fs/ksmbd/smb2pdu.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  *   Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
0004  *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
0005  */
0006
0007 #include <linux/inetdevice.h>
0008 #include <net/addrconf.h>
0009 #include <linux/syscalls.h>
0010 #include <linux/namei.h>
0011 #include <linux/statfs.h>
0012 #include <linux/ethtool.h>
0013 #include <linux/falloc.h>
0014 #include <linux/mount.h>
0015
0016 #include "glob.h"
0017 #include "smbfsctl.h"
0018 #include "oplock.h"
0019 #include "smbacl.h"
0020
0021 #include "auth.h"
0022 #include "asn1.h"
0023 #include "connection.h"
0024 #include "transport_ipc.h"
0025 #include "transport_rdma.h"
0026 #include "vfs.h"
0027 #include "vfs_cache.h"
0028 #include "misc.h"
0029
0030 #include "server.h"
0031 #include "smb_common.h"
0032 #include "smbstatus.h"
0033 #include "ksmbd_work.h"
0034 #include "mgmt/user_config.h"
0035 #include "mgmt/share_config.h"
0036 #include "mgmt/tree_connect.h"
0037 #include "mgmt/user_session.h"
0038 #include "mgmt/ksmbd_ida.h"
0039 #include "ndr.h"
0040
0041 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
0042 {
0043     if (work->next_smb2_rcv_hdr_off) {
0044         *req = ksmbd_req_buf_next(work);
0045         *rsp = ksmbd_resp_buf_next(work);
0046     } else {
0047         *req = smb2_get_msg(work->request_buf);
0048         *rsp = smb2_get_msg(work->response_buf);
0049     }
0050 }
0051
0052 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
0053
0054 /**
0055  * check_session_id() - check for valid session id in smb header
0056  * @conn:   connection instance
0057  * @id:     session id from smb header
0058  *
0059  * Return:      1 if valid session id, otherwise 0
0060  */
0061 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
0062 {
0063     struct ksmbd_session *sess;
0064
0065     if (id == 0 || id == -1)
0066         return false;
0067
0068     sess = ksmbd_session_lookup_all(conn, id);
0069     if (sess)
0070         return true;
0071     pr_err("Invalid user session id: %llu\n", id);
0072     return false;
0073 }
0074
0075 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
0076 {
0077     struct channel *chann;
0078
0079     list_for_each_entry(chann, &sess->ksmbd_chann_list, chann_list) {
0080         if (chann->conn == conn)
0081             return chann;
0082     }
0083
0084     return NULL;
0085 }
0086
0087 /**
0088  * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
0089  * @work:   smb work
0090  *
0091  * Return:  0 if there is a tree connection matched or these are
0092  *      skipable commands, otherwise error
0093  */
0094 int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
0095 {
0096     struct smb2_hdr *req_hdr = smb2_get_msg(work->request_buf);
0097     unsigned int cmd = le16_to_cpu(req_hdr->Command);
0098     int tree_id;
0099
0100     work->tcon = NULL;
0101     if (cmd == SMB2_TREE_CONNECT_HE ||
0102         cmd ==  SMB2_CANCEL_HE ||
0103         cmd ==  SMB2_LOGOFF_HE) {
0104         ksmbd_debug(SMB, "skip to check tree connect request\n");
0105         return 0;
0106     }
0107
0108     if (xa_empty(&work->sess->tree_conns)) {
0109         ksmbd_debug(SMB, "NO tree connected\n");
0110         return -ENOENT;
0111     }
0112
0113     tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
0114     work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
0115     if (!work->tcon) {
0116         pr_err("Invalid tid %d\n", tree_id);
0117         return -EINVAL;
0118     }
0119
0120     return 1;
0121 }
0122
0123 /**
0124  * smb2_set_err_rsp() - set error response code on smb response
0125  * @work:   smb work containing response buffer
0126  */
0127 void smb2_set_err_rsp(struct ksmbd_work *work)
0128 {
0129     struct smb2_err_rsp *err_rsp;
0130
0131     if (work->next_smb2_rcv_hdr_off)
0132         err_rsp = ksmbd_resp_buf_next(work);
0133     else
0134         err_rsp = smb2_get_msg(work->response_buf);
0135
0136     if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
0137         err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
0138         err_rsp->ErrorContextCount = 0;
0139         err_rsp->Reserved = 0;
0140         err_rsp->ByteCount = 0;
0141         err_rsp->ErrorData[0] = 0;
0142         inc_rfc1001_len(work->response_buf, SMB2_ERROR_STRUCTURE_SIZE2);
0143     }
0144 }
0145
0146 /**
0147  * is_smb2_neg_cmd() - is it smb2 negotiation command
0148  * @work:   smb work containing smb header
0149  *
0150  * Return:      true if smb2 negotiation command, otherwise false
0151  */
0152 bool is_smb2_neg_cmd(struct ksmbd_work *work)
0153 {
0154     struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
0155
0156     /* is it SMB2 header ? */
0157     if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
0158         return false;
0159
0160     /* make sure it is request not response message */
0161     if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
0162         return false;
0163
0164     if (hdr->Command != SMB2_NEGOTIATE)
0165         return false;
0166
0167     return true;
0168 }
0169
0170 /**
0171  * is_smb2_rsp() - is it smb2 response
0172  * @work:   smb work containing smb response buffer
0173  *
0174  * Return:      true if smb2 response, otherwise false
0175  */
0176 bool is_smb2_rsp(struct ksmbd_work *work)
0177 {
0178     struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
0179
0180     /* is it SMB2 header ? */
0181     if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
0182         return false;
0183
0184     /* make sure it is response not request message */
0185     if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
0186         return false;
0187
0188     return true;
0189 }
0190
0191 /**
0192  * get_smb2_cmd_val() - get smb command code from smb header
0193  * @work:   smb work containing smb request buffer
0194  *
0195  * Return:      smb2 request command value
0196  */
0197 u16 get_smb2_cmd_val(struct ksmbd_work *work)
0198 {
0199     struct smb2_hdr *rcv_hdr;
0200
0201     if (work->next_smb2_rcv_hdr_off)
0202         rcv_hdr = ksmbd_req_buf_next(work);
0203     else
0204         rcv_hdr = smb2_get_msg(work->request_buf);
0205     return le16_to_cpu(rcv_hdr->Command);
0206 }
0207
0208 /**
0209  * set_smb2_rsp_status() - set error response code on smb2 header
0210  * @work:   smb work containing response buffer
0211  * @err:    error response code
0212  */
0213 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
0214 {
0215     struct smb2_hdr *rsp_hdr;
0216
0217     if (work->next_smb2_rcv_hdr_off)
0218         rsp_hdr = ksmbd_resp_buf_next(work);
0219     else
0220         rsp_hdr = smb2_get_msg(work->response_buf);
0221     rsp_hdr->Status = err;
0222     smb2_set_err_rsp(work);
0223 }
0224
0225 /**
0226  * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
0227  * @work:   smb work containing smb request buffer
0228  *
0229  * smb2 negotiate response is sent in reply of smb1 negotiate command for
0230  * dialect auto-negotiation.
0231  */
0232 int init_smb2_neg_rsp(struct ksmbd_work *work)
0233 {
0234     struct smb2_hdr *rsp_hdr;
0235     struct smb2_negotiate_rsp *rsp;
0236     struct ksmbd_conn *conn = work->conn;
0237
0238     if (conn->need_neg == false)
0239         return -EINVAL;
0240
0241     *(__be32 *)work->response_buf =
0242         cpu_to_be32(conn->vals->header_size);
0243
0244     rsp_hdr = smb2_get_msg(work->response_buf);
0245     memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
0246     rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
0247     rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
0248     rsp_hdr->CreditRequest = cpu_to_le16(2);
0249     rsp_hdr->Command = SMB2_NEGOTIATE;
0250     rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
0251     rsp_hdr->NextCommand = 0;
0252     rsp_hdr->MessageId = 0;
0253     rsp_hdr->Id.SyncId.ProcessId = 0;
0254     rsp_hdr->Id.SyncId.TreeId = 0;
0255     rsp_hdr->SessionId = 0;
0256     memset(rsp_hdr->Signature, 0, 16);
0257
0258     rsp = smb2_get_msg(work->response_buf);
0259
0260     WARN_ON(ksmbd_conn_good(work));
0261
0262     rsp->StructureSize = cpu_to_le16(65);
0263     ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
0264     rsp->DialectRevision = cpu_to_le16(conn->dialect);
0265     /* Not setting conn guid rsp->ServerGUID, as it
0266      * not used by client for identifying connection
0267      */
0268     rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
0269     /* Default Max Message Size till SMB2.0, 64K*/
0270     rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
0271     rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
0272     rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
0273
0274     rsp->SystemTime = cpu_to_le64(ksmbd_systime());
0275     rsp->ServerStartTime = 0;
0276
0277     rsp->SecurityBufferOffset = cpu_to_le16(128);
0278     rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
0279     ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
0280         le16_to_cpu(rsp->SecurityBufferOffset));
0281     inc_rfc1001_len(work->response_buf,
0282             sizeof(struct smb2_negotiate_rsp) -
0283             sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
0284             AUTH_GSS_LENGTH);
0285     rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
0286     if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
0287         rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
0288     conn->use_spnego = true;
0289
0290     ksmbd_conn_set_need_negotiate(work);
0291     return 0;
0292 }
0293
0294 /**
0295  * smb2_set_rsp_credits() - set number of credits in response buffer
0296  * @work:   smb work containing smb response buffer
0297  */
0298 int smb2_set_rsp_credits(struct ksmbd_work *work)
0299 {
0300     struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
0301     struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
0302     struct ksmbd_conn *conn = work->conn;
0303     unsigned short credits_requested, aux_max;
0304     unsigned short credit_charge, credits_granted = 0;
0305
0306     if (work->send_no_response)
0307         return 0;
0308
0309     hdr->CreditCharge = req_hdr->CreditCharge;
0310
0311     if (conn->total_credits > conn->vals->max_credits) {
0312         hdr->CreditRequest = 0;
0313         pr_err("Total credits overflow: %d\n", conn->total_credits);
0314         return -EINVAL;
0315     }
0316
0317     credit_charge = max_t(unsigned short,
0318                   le16_to_cpu(req_hdr->CreditCharge), 1);
0319     if (credit_charge > conn->total_credits) {
0320         ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
0321                 credit_charge, conn->total_credits);
0322         return -EINVAL;
0323     }
0324
0325     conn->total_credits -= credit_charge;
0326     conn->outstanding_credits -= credit_charge;
0327     credits_requested = max_t(unsigned short,
0328                   le16_to_cpu(req_hdr->CreditRequest), 1);
0329
0330     /* according to smb2.credits smbtorture, Windows server
0331      * 2016 or later grant up to 8192 credits at once.
0332      *
0333      * TODO: Need to adjuct CreditRequest value according to
0334      * current cpu load
0335      */
0336     if (hdr->Command == SMB2_NEGOTIATE)
0337         aux_max = 1;
0338     else
0339         aux_max = conn->vals->max_credits - credit_charge;
0340     credits_granted = min_t(unsigned short, credits_requested, aux_max);
0341
0342     if (conn->vals->max_credits - conn->total_credits < credits_granted)
0343         credits_granted = conn->vals->max_credits -
0344             conn->total_credits;
0345
0346     conn->total_credits += credits_granted;
0347     work->credits_granted += credits_granted;
0348
0349     if (!req_hdr->NextCommand) {
0350         /* Update CreditRequest in last request */
0351         hdr->CreditRequest = cpu_to_le16(work->credits_granted);
0352     }
0353     ksmbd_debug(SMB,
0354             "credits: requested[%d] granted[%d] total_granted[%d]\n",
0355             credits_requested, credits_granted,
0356             conn->total_credits);
0357     return 0;
0358 }
0359
0360 /**
0361  * init_chained_smb2_rsp() - initialize smb2 chained response
0362  * @work:   smb work containing smb response buffer
0363  */
0364 static void init_chained_smb2_rsp(struct ksmbd_work *work)
0365 {
0366     struct smb2_hdr *req = ksmbd_req_buf_next(work);
0367     struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
0368     struct smb2_hdr *rsp_hdr;
0369     struct smb2_hdr *rcv_hdr;
0370     int next_hdr_offset = 0;
0371     int len, new_len;
0372
0373     /* Len of this response = updated RFC len - offset of previous cmd
0374      * in the compound rsp
0375      */
0376
0377     /* Storing the current local FID which may be needed by subsequent
0378      * command in the compound request
0379      */
0380     if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
0381         work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;
0382         work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;
0383         work->compound_sid = le64_to_cpu(rsp->SessionId);
0384     }
0385
0386     len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
0387     next_hdr_offset = le32_to_cpu(req->NextCommand);
0388
0389     new_len = ALIGN(len, 8);
0390     inc_rfc1001_len(work->response_buf,
0391             sizeof(struct smb2_hdr) + new_len - len);
0392     rsp->NextCommand = cpu_to_le32(new_len);
0393
0394     work->next_smb2_rcv_hdr_off += next_hdr_offset;
0395     work->next_smb2_rsp_hdr_off += new_len;
0396     ksmbd_debug(SMB,
0397             "Compound req new_len = %d rcv off = %d rsp off = %d\n",
0398             new_len, work->next_smb2_rcv_hdr_off,
0399             work->next_smb2_rsp_hdr_off);
0400
0401     rsp_hdr = ksmbd_resp_buf_next(work);
0402     rcv_hdr = ksmbd_req_buf_next(work);
0403
0404     if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
0405         ksmbd_debug(SMB, "related flag should be set\n");
0406         work->compound_fid = KSMBD_NO_FID;
0407         work->compound_pfid = KSMBD_NO_FID;
0408     }
0409     memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
0410     rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
0411     rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
0412     rsp_hdr->Command = rcv_hdr->Command;
0413
0414     /*
0415      * Message is response. We don't grant oplock yet.
0416      */
0417     rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
0418                 SMB2_FLAGS_RELATED_OPERATIONS);
0419     rsp_hdr->NextCommand = 0;
0420     rsp_hdr->MessageId = rcv_hdr->MessageId;
0421     rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
0422     rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
0423     rsp_hdr->SessionId = rcv_hdr->SessionId;
0424     memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
0425 }
0426
0427 /**
0428  * is_chained_smb2_message() - check for chained command
0429  * @work:   smb work containing smb request buffer
0430  *
0431  * Return:      true if chained request, otherwise false
0432  */
0433 bool is_chained_smb2_message(struct ksmbd_work *work)
0434 {
0435     struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
0436     unsigned int len, next_cmd;
0437
0438     if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
0439         return false;
0440
0441     hdr = ksmbd_req_buf_next(work);
0442     next_cmd = le32_to_cpu(hdr->NextCommand);
0443     if (next_cmd > 0) {
0444         if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
0445             __SMB2_HEADER_STRUCTURE_SIZE >
0446             get_rfc1002_len(work->request_buf)) {
0447             pr_err("next command(%u) offset exceeds smb msg size\n",
0448                    next_cmd);
0449             return false;
0450         }
0451
0452         if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
0453             work->response_sz) {
0454             pr_err("next response offset exceeds response buffer size\n");
0455             return false;
0456         }
0457
0458         ksmbd_debug(SMB, "got SMB2 chained command\n");
0459         init_chained_smb2_rsp(work);
0460         return true;
0461     } else if (work->next_smb2_rcv_hdr_off) {
0462         /*
0463          * This is last request in chained command,
0464          * align response to 8 byte
0465          */
0466         len = ALIGN(get_rfc1002_len(work->response_buf), 8);
0467         len = len - get_rfc1002_len(work->response_buf);
0468         if (len) {
0469             ksmbd_debug(SMB, "padding len %u\n", len);
0470             inc_rfc1001_len(work->response_buf, len);
0471             if (work->aux_payload_sz)
0472                 work->aux_payload_sz += len;
0473         }
0474     }
0475     return false;
0476 }
0477
0478 /**
0479  * init_smb2_rsp_hdr() - initialize smb2 response
0480  * @work:   smb work containing smb request buffer
0481  *
0482  * Return:      0
0483  */
0484 int init_smb2_rsp_hdr(struct ksmbd_work *work)
0485 {
0486     struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
0487     struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
0488     struct ksmbd_conn *conn = work->conn;
0489
0490     memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
0491     *(__be32 *)work->response_buf =
0492         cpu_to_be32(conn->vals->header_size);
0493     rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
0494     rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
0495     rsp_hdr->Command = rcv_hdr->Command;
0496
0497     /*
0498      * Message is response. We don't grant oplock yet.
0499      */
0500     rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
0501     rsp_hdr->NextCommand = 0;
0502     rsp_hdr->MessageId = rcv_hdr->MessageId;
0503     rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
0504     rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
0505     rsp_hdr->SessionId = rcv_hdr->SessionId;
0506     memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
0507
0508     work->syncronous = true;
0509     if (work->async_id) {
0510         ksmbd_release_id(&conn->async_ida, work->async_id);
0511         work->async_id = 0;
0512     }
0513
0514     return 0;
0515 }
0516
0517 /**
0518  * smb2_allocate_rsp_buf() - allocate smb2 response buffer
0519  * @work:   smb work containing smb request buffer
0520  *
0521  * Return:      0 on success, otherwise -ENOMEM
0522  */
0523 int smb2_allocate_rsp_buf(struct ksmbd_work *work)
0524 {
0525     struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
0526     size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
0527     size_t large_sz = small_sz + work->conn->vals->max_trans_size;
0528     size_t sz = small_sz;
0529     int cmd = le16_to_cpu(hdr->Command);
0530
0531     if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
0532         sz = large_sz;
0533
0534     if (cmd == SMB2_QUERY_INFO_HE) {
0535         struct smb2_query_info_req *req;
0536
0537         req = smb2_get_msg(work->request_buf);
0538         if ((req->InfoType == SMB2_O_INFO_FILE &&
0539              (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
0540              req->FileInfoClass == FILE_ALL_INFORMATION)) ||
0541             req->InfoType == SMB2_O_INFO_SECURITY)
0542             sz = large_sz;
0543     }
0544
0545     /* allocate large response buf for chained commands */
0546     if (le32_to_cpu(hdr->NextCommand) > 0)
0547         sz = large_sz;
0548
0549     work->response_buf = kvmalloc(sz, GFP_KERNEL | __GFP_ZERO);
0550     if (!work->response_buf)
0551         return -ENOMEM;
0552
0553     work->response_sz = sz;
0554     return 0;
0555 }
0556
0557 /**
0558  * smb2_check_user_session() - check for valid session for a user
0559  * @work:   smb work containing smb request buffer
0560  *
0561  * Return:      0 on success, otherwise error
0562  */
0563 int smb2_check_user_session(struct ksmbd_work *work)
0564 {
0565     struct smb2_hdr *req_hdr = smb2_get_msg(work->request_buf);
0566     struct ksmbd_conn *conn = work->conn;
0567     unsigned int cmd = conn->ops->get_cmd_val(work);
0568     unsigned long long sess_id;
0569
0570     work->sess = NULL;
0571     /*
0572      * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
0573      * require a session id, so no need to validate user session's for
0574      * these commands.
0575      */
0576     if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
0577         cmd == SMB2_SESSION_SETUP_HE)
0578         return 0;
0579
0580     if (!ksmbd_conn_good(work))
0581         return -EINVAL;
0582
0583     sess_id = le64_to_cpu(req_hdr->SessionId);
0584     /* Check for validity of user session */
0585     work->sess = ksmbd_session_lookup_all(conn, sess_id);
0586     if (work->sess)
0587         return 1;
0588     ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
0589     return -EINVAL;
0590 }
0591
0592 static void destroy_previous_session(struct ksmbd_conn *conn,
0593                      struct ksmbd_user *user, u64 id)
0594 {
0595     struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id);
0596     struct ksmbd_user *prev_user;
0597     struct channel *chann;
0598
0599     if (!prev_sess)
0600         return;
0601
0602     prev_user = prev_sess->user;
0603
0604     if (!prev_user ||
0605         strcmp(user->name, prev_user->name) ||
0606         user->passkey_sz != prev_user->passkey_sz ||
0607         memcmp(user->passkey, prev_user->passkey, user->passkey_sz))
0608         return;
0609
0610     prev_sess->state = SMB2_SESSION_EXPIRED;
0611     write_lock(&prev_sess->chann_lock);
0612     list_for_each_entry(chann, &prev_sess->ksmbd_chann_list, chann_list)
0613         chann->conn->status = KSMBD_SESS_EXITING;
0614     write_unlock(&prev_sess->chann_lock);
0615 }
0616
0617 /**
0618  * smb2_get_name() - get filename string from on the wire smb format
0619  * @src:    source buffer
0620  * @maxlen: maxlen of source string
0621  * @local_nls:  nls_table pointer
0622  *
0623  * Return:      matching converted filename on success, otherwise error ptr
0624  */
0625 static char *
0626 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
0627 {
0628     char *name;
0629
0630     name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
0631     if (IS_ERR(name)) {
0632         pr_err("failed to get name %ld\n", PTR_ERR(name));
0633         return name;
0634     }
0635
0636     ksmbd_conv_path_to_unix(name);
0637     ksmbd_strip_last_slash(name);
0638     return name;
0639 }
0640
0641 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
0642 {
0643     struct smb2_hdr *rsp_hdr;
0644     struct ksmbd_conn *conn = work->conn;
0645     int id;
0646
0647     rsp_hdr = smb2_get_msg(work->response_buf);
0648     rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
0649
0650     id = ksmbd_acquire_async_msg_id(&conn->async_ida);
0651     if (id < 0) {
0652         pr_err("Failed to alloc async message id\n");
0653         return id;
0654     }
0655     work->syncronous = false;
0656     work->async_id = id;
0657     rsp_hdr->Id.AsyncId = cpu_to_le64(id);
0658
0659     ksmbd_debug(SMB,
0660             "Send interim Response to inform async request id : %d\n",
0661             work->async_id);
0662
0663     work->cancel_fn = fn;
0664     work->cancel_argv = arg;
0665
0666     if (list_empty(&work->async_request_entry)) {
0667         spin_lock(&conn->request_lock);
0668         list_add_tail(&work->async_request_entry, &conn->async_requests);
0669         spin_unlock(&conn->request_lock);
0670     }
0671
0672     return 0;
0673 }
0674
0675 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
0676 {
0677     struct smb2_hdr *rsp_hdr;
0678
0679     rsp_hdr = smb2_get_msg(work->response_buf);
0680     smb2_set_err_rsp(work);
0681     rsp_hdr->Status = status;
0682
0683     work->multiRsp = 1;
0684     ksmbd_conn_write(work);
0685     rsp_hdr->Status = 0;
0686     work->multiRsp = 0;
0687 }
0688
0689 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
0690 {
0691     if (S_ISDIR(mode) || S_ISREG(mode))
0692         return 0;
0693
0694     if (S_ISLNK(mode))
0695         return IO_REPARSE_TAG_LX_SYMLINK_LE;
0696     else if (S_ISFIFO(mode))
0697         return IO_REPARSE_TAG_LX_FIFO_LE;
0698     else if (S_ISSOCK(mode))
0699         return IO_REPARSE_TAG_AF_UNIX_LE;
0700     else if (S_ISCHR(mode))
0701         return IO_REPARSE_TAG_LX_CHR_LE;
0702     else if (S_ISBLK(mode))
0703         return IO_REPARSE_TAG_LX_BLK_LE;
0704
0705     return 0;
0706 }
0707
0708 /**
0709  * smb2_get_dos_mode() - get file mode in dos format from unix mode
0710  * @stat:   kstat containing file mode
0711  * @attribute:  attribute flags
0712  *
0713  * Return:      converted dos mode
0714  */
0715 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
0716 {
0717     int attr = 0;
0718
0719     if (S_ISDIR(stat->mode)) {
0720         attr = FILE_ATTRIBUTE_DIRECTORY |
0721             (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
0722     } else {
0723         attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
0724         attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
0725         if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
0726                 FILE_SUPPORTS_SPARSE_FILES))
0727             attr |= FILE_ATTRIBUTE_SPARSE_FILE;
0728
0729         if (smb2_get_reparse_tag_special_file(stat->mode))
0730             attr |= FILE_ATTRIBUTE_REPARSE_POINT;
0731     }
0732
0733     return attr;
0734 }
0735
0736 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
0737                    __le16 hash_id)
0738 {
0739     pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
0740     pneg_ctxt->DataLength = cpu_to_le16(38);
0741     pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
0742     pneg_ctxt->Reserved = cpu_to_le32(0);
0743     pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
0744     get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
0745     pneg_ctxt->HashAlgorithms = hash_id;
0746 }
0747
0748 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
0749                    __le16 cipher_type)
0750 {
0751     pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
0752     pneg_ctxt->DataLength = cpu_to_le16(4);
0753     pneg_ctxt->Reserved = cpu_to_le32(0);
0754     pneg_ctxt->CipherCount = cpu_to_le16(1);
0755     pneg_ctxt->Ciphers[0] = cipher_type;
0756 }
0757
0758 static void build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt,
0759                    __le16 comp_algo)
0760 {
0761     pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES;
0762     pneg_ctxt->DataLength =
0763         cpu_to_le16(sizeof(struct smb2_compression_capabilities_context)
0764             - sizeof(struct smb2_neg_context));
0765     pneg_ctxt->Reserved = cpu_to_le32(0);
0766     pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(1);
0767     pneg_ctxt->Flags = cpu_to_le32(0);
0768     pneg_ctxt->CompressionAlgorithms[0] = comp_algo;
0769 }
0770
0771 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
0772                 __le16 sign_algo)
0773 {
0774     pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
0775     pneg_ctxt->DataLength =
0776         cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
0777             - sizeof(struct smb2_neg_context));
0778     pneg_ctxt->Reserved = cpu_to_le32(0);
0779     pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
0780     pneg_ctxt->SigningAlgorithms[0] = sign_algo;
0781 }
0782
0783 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
0784 {
0785     pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
0786     pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
0787     /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
0788     pneg_ctxt->Name[0] = 0x93;
0789     pneg_ctxt->Name[1] = 0xAD;
0790     pneg_ctxt->Name[2] = 0x25;
0791     pneg_ctxt->Name[3] = 0x50;
0792     pneg_ctxt->Name[4] = 0x9C;
0793     pneg_ctxt->Name[5] = 0xB4;
0794     pneg_ctxt->Name[6] = 0x11;
0795     pneg_ctxt->Name[7] = 0xE7;
0796     pneg_ctxt->Name[8] = 0xB4;
0797     pneg_ctxt->Name[9] = 0x23;
0798     pneg_ctxt->Name[10] = 0x83;
0799     pneg_ctxt->Name[11] = 0xDE;
0800     pneg_ctxt->Name[12] = 0x96;
0801     pneg_ctxt->Name[13] = 0x8B;
0802     pneg_ctxt->Name[14] = 0xCD;
0803     pneg_ctxt->Name[15] = 0x7C;
0804 }
0805
0806 static void assemble_neg_contexts(struct ksmbd_conn *conn,
0807                   struct smb2_negotiate_rsp *rsp,
0808                   void *smb2_buf_len)
0809 {
0810     char *pneg_ctxt = (char *)rsp +
0811             le32_to_cpu(rsp->NegotiateContextOffset);
0812     int neg_ctxt_cnt = 1;
0813     int ctxt_size;
0814
0815     ksmbd_debug(SMB,
0816             "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
0817     build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
0818                conn->preauth_info->Preauth_HashId);
0819     rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
0820     inc_rfc1001_len(smb2_buf_len, AUTH_GSS_PADDING);
0821     ctxt_size = sizeof(struct smb2_preauth_neg_context);
0822     /* Round to 8 byte boundary */
0823     pneg_ctxt += round_up(sizeof(struct smb2_preauth_neg_context), 8);
0824
0825     if (conn->cipher_type) {
0826         ctxt_size = round_up(ctxt_size, 8);
0827         ksmbd_debug(SMB,
0828                 "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
0829         build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt,
0830                    conn->cipher_type);
0831         rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
0832         ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
0833         /* Round to 8 byte boundary */
0834         pneg_ctxt +=
0835             round_up(sizeof(struct smb2_encryption_neg_context) + 2,
0836                  8);
0837     }
0838
0839     if (conn->compress_algorithm) {
0840         ctxt_size = round_up(ctxt_size, 8);
0841         ksmbd_debug(SMB,
0842                 "assemble SMB2_COMPRESSION_CAPABILITIES context\n");
0843         /* Temporarily set to SMB3_COMPRESS_NONE */
0844         build_compression_ctxt((struct smb2_compression_capabilities_context *)pneg_ctxt,
0845                        conn->compress_algorithm);
0846         rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
0847         ctxt_size += sizeof(struct smb2_compression_capabilities_context) + 2;
0848         /* Round to 8 byte boundary */
0849         pneg_ctxt += round_up(sizeof(struct smb2_compression_capabilities_context) + 2,
0850                       8);
0851     }
0852
0853     if (conn->posix_ext_supported) {
0854         ctxt_size = round_up(ctxt_size, 8);
0855         ksmbd_debug(SMB,
0856                 "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
0857         build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
0858         rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
0859         ctxt_size += sizeof(struct smb2_posix_neg_context);
0860         /* Round to 8 byte boundary */
0861         pneg_ctxt += round_up(sizeof(struct smb2_posix_neg_context), 8);
0862     }
0863
0864     if (conn->signing_negotiated) {
0865         ctxt_size = round_up(ctxt_size, 8);
0866         ksmbd_debug(SMB,
0867                 "assemble SMB2_SIGNING_CAPABILITIES context\n");
0868         build_sign_cap_ctxt((struct smb2_signing_capabilities *)pneg_ctxt,
0869                     conn->signing_algorithm);
0870         rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
0871         ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
0872     }
0873
0874     inc_rfc1001_len(smb2_buf_len, ctxt_size);
0875 }
0876
0877 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
0878                   struct smb2_preauth_neg_context *pneg_ctxt)
0879 {
0880     __le32 err = STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
0881
0882     if (pneg_ctxt->HashAlgorithms == SMB2_PREAUTH_INTEGRITY_SHA512) {
0883         conn->preauth_info->Preauth_HashId =
0884             SMB2_PREAUTH_INTEGRITY_SHA512;
0885         err = STATUS_SUCCESS;
0886     }
0887
0888     return err;
0889 }
0890
0891 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
0892                 struct smb2_encryption_neg_context *pneg_ctxt,
0893                 int len_of_ctxts)
0894 {
0895     int cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
0896     int i, cphs_size = cph_cnt * sizeof(__le16);
0897
0898     conn->cipher_type = 0;
0899
0900     if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
0901         len_of_ctxts) {
0902         pr_err("Invalid cipher count(%d)\n", cph_cnt);
0903         return;
0904     }
0905
0906     if (!(server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION))
0907         return;
0908
0909     for (i = 0; i < cph_cnt; i++) {
0910         if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
0911             pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
0912             pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
0913             pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
0914             ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
0915                     pneg_ctxt->Ciphers[i]);
0916             conn->cipher_type = pneg_ctxt->Ciphers[i];
0917             break;
0918         }
0919     }
0920 }
0921
0922 /**
0923  * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
0924  * @conn:   smb connection
0925  *
0926  * Return:  true if connection should be encrypted, else false
0927  */
0928 static bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
0929 {
0930     if (!conn->ops->generate_encryptionkey)
0931         return false;
0932
0933     /*
0934      * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
0935      * SMB 3.1.1 uses the cipher_type field.
0936      */
0937     return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
0938         conn->cipher_type;
0939 }
0940
0941 static void decode_compress_ctxt(struct ksmbd_conn *conn,
0942                  struct smb2_compression_capabilities_context *pneg_ctxt)
0943 {
0944     conn->compress_algorithm = SMB3_COMPRESS_NONE;
0945 }
0946
0947 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
0948                  struct smb2_signing_capabilities *pneg_ctxt,
0949                  int len_of_ctxts)
0950 {
0951     int sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
0952     int i, sign_alos_size = sign_algo_cnt * sizeof(__le16);
0953
0954     conn->signing_negotiated = false;
0955
0956     if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
0957         len_of_ctxts) {
0958         pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
0959         return;
0960     }
0961
0962     for (i = 0; i < sign_algo_cnt; i++) {
0963         if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
0964             pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
0965             ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
0966                     pneg_ctxt->SigningAlgorithms[i]);
0967             conn->signing_negotiated = true;
0968             conn->signing_algorithm =
0969                 pneg_ctxt->SigningAlgorithms[i];
0970             break;
0971         }
0972     }
0973 }
0974
0975 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
0976                       struct smb2_negotiate_req *req,
0977                       int len_of_smb)
0978 {
0979     /* +4 is to account for the RFC1001 len field */
0980     struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
0981     int i = 0, len_of_ctxts;
0982     int offset = le32_to_cpu(req->NegotiateContextOffset);
0983     int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
0984     __le32 status = STATUS_INVALID_PARAMETER;
0985
0986     ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
0987     if (len_of_smb <= offset) {
0988         ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
0989         return status;
0990     }
0991
0992     len_of_ctxts = len_of_smb - offset;
0993
0994     while (i++ < neg_ctxt_cnt) {
0995         int clen;
0996
0997         /* check that offset is not beyond end of SMB */
0998         if (len_of_ctxts == 0)
0999             break;
1000
1001         if (len_of_ctxts < sizeof(struct smb2_neg_context))
1002             break;
1003
1004         pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1005         clen = le16_to_cpu(pctx->DataLength);
1006         if (clen + sizeof(struct smb2_neg_context) > len_of_ctxts)
1007             break;
1008
1009         if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1010             ksmbd_debug(SMB,
1011                     "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1012             if (conn->preauth_info->Preauth_HashId)
1013                 break;
1014
1015             status = decode_preauth_ctxt(conn,
1016                              (struct smb2_preauth_neg_context *)pctx);
1017             if (status != STATUS_SUCCESS)
1018                 break;
1019         } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1020             ksmbd_debug(SMB,
1021                     "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1022             if (conn->cipher_type)
1023                 break;
1024
1025             decode_encrypt_ctxt(conn,
1026                         (struct smb2_encryption_neg_context *)pctx,
1027                         len_of_ctxts);
1028         } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1029             ksmbd_debug(SMB,
1030                     "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1031             if (conn->compress_algorithm)
1032                 break;
1033
1034             decode_compress_ctxt(conn,
1035                          (struct smb2_compression_capabilities_context *)pctx);
1036         } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1037             ksmbd_debug(SMB,
1038                     "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1039         } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1040             ksmbd_debug(SMB,
1041                     "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1042             conn->posix_ext_supported = true;
1043         } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1044             ksmbd_debug(SMB,
1045                     "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1046             decode_sign_cap_ctxt(conn,
1047                          (struct smb2_signing_capabilities *)pctx,
1048                          len_of_ctxts);
1049         }
1050
1051         /* offsets must be 8 byte aligned */
1052         clen = (clen + 7) & ~0x7;
1053         offset = clen + sizeof(struct smb2_neg_context);
1054         len_of_ctxts -= clen + sizeof(struct smb2_neg_context);
1055     }
1056     return status;
1057 }
1058
1059 /**
1060  * smb2_handle_negotiate() - handler for smb2 negotiate command
1061  * @work:   smb work containing smb request buffer
1062  *
1063  * Return:      0
1064  */
1065 int smb2_handle_negotiate(struct ksmbd_work *work)
1066 {
1067     struct ksmbd_conn *conn = work->conn;
1068     struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1069     struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1070     int rc = 0;
1071     unsigned int smb2_buf_len, smb2_neg_size;
1072     __le32 status;
1073
1074     ksmbd_debug(SMB, "Received negotiate request\n");
1075     conn->need_neg = false;
1076     if (ksmbd_conn_good(work)) {
1077         pr_err("conn->tcp_status is already in CifsGood State\n");
1078         work->send_no_response = 1;
1079         return rc;
1080     }
1081
1082     if (req->DialectCount == 0) {
1083         pr_err("malformed packet\n");
1084         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1085         rc = -EINVAL;
1086         goto err_out;
1087     }
1088
1089     smb2_buf_len = get_rfc1002_len(work->request_buf);
1090     smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1091     if (smb2_neg_size > smb2_buf_len) {
1092         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1093         rc = -EINVAL;
1094         goto err_out;
1095     }
1096
1097     if (conn->dialect == SMB311_PROT_ID) {
1098         unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1099
1100         if (smb2_buf_len < nego_ctxt_off) {
1101             rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1102             rc = -EINVAL;
1103             goto err_out;
1104         }
1105
1106         if (smb2_neg_size > nego_ctxt_off) {
1107             rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1108             rc = -EINVAL;
1109             goto err_out;
1110         }
1111
1112         if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1113             nego_ctxt_off) {
1114             rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1115             rc = -EINVAL;
1116             goto err_out;
1117         }
1118     } else {
1119         if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1120             smb2_buf_len) {
1121             rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1122             rc = -EINVAL;
1123             goto err_out;
1124         }
1125     }
1126
1127     conn->cli_cap = le32_to_cpu(req->Capabilities);
1128     switch (conn->dialect) {
1129     case SMB311_PROT_ID:
1130         conn->preauth_info =
1131             kzalloc(sizeof(struct preauth_integrity_info),
1132                 GFP_KERNEL);
1133         if (!conn->preauth_info) {
1134             rc = -ENOMEM;
1135             rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1136             goto err_out;
1137         }
1138
1139         status = deassemble_neg_contexts(conn, req,
1140                          get_rfc1002_len(work->request_buf));
1141         if (status != STATUS_SUCCESS) {
1142             pr_err("deassemble_neg_contexts error(0x%x)\n",
1143                    status);
1144             rsp->hdr.Status = status;
1145             rc = -EINVAL;
1146             kfree(conn->preauth_info);
1147             conn->preauth_info = NULL;
1148             goto err_out;
1149         }
1150
1151         rc = init_smb3_11_server(conn);
1152         if (rc < 0) {
1153             rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1154             kfree(conn->preauth_info);
1155             conn->preauth_info = NULL;
1156             goto err_out;
1157         }
1158
1159         ksmbd_gen_preauth_integrity_hash(conn,
1160                          work->request_buf,
1161                          conn->preauth_info->Preauth_HashValue);
1162         rsp->NegotiateContextOffset =
1163                 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1164         assemble_neg_contexts(conn, rsp, work->response_buf);
1165         break;
1166     case SMB302_PROT_ID:
1167         init_smb3_02_server(conn);
1168         break;
1169     case SMB30_PROT_ID:
1170         init_smb3_0_server(conn);
1171         break;
1172     case SMB21_PROT_ID:
1173         init_smb2_1_server(conn);
1174         break;
1175     case SMB2X_PROT_ID:
1176     case BAD_PROT_ID:
1177     default:
1178         ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1179                 conn->dialect);
1180         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1181         rc = -EINVAL;
1182         goto err_out;
1183     }
1184     rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1185
1186     /* For stats */
1187     conn->connection_type = conn->dialect;
1188
1189     rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1190     rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1191     rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1192
1193     memcpy(conn->ClientGUID, req->ClientGUID,
1194             SMB2_CLIENT_GUID_SIZE);
1195     conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1196
1197     rsp->StructureSize = cpu_to_le16(65);
1198     rsp->DialectRevision = cpu_to_le16(conn->dialect);
1199     /* Not setting conn guid rsp->ServerGUID, as it
1200      * not used by client for identifying server
1201      */
1202     memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1203
1204     rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1205     rsp->ServerStartTime = 0;
1206     ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1207             le32_to_cpu(rsp->NegotiateContextOffset),
1208             le16_to_cpu(rsp->NegotiateContextCount));
1209
1210     rsp->SecurityBufferOffset = cpu_to_le16(128);
1211     rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1212     ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1213                   le16_to_cpu(rsp->SecurityBufferOffset));
1214     inc_rfc1001_len(work->response_buf, sizeof(struct smb2_negotiate_rsp) -
1215             sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
1216              AUTH_GSS_LENGTH);
1217     rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1218     conn->use_spnego = true;
1219
1220     if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1221          server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1222         req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1223         conn->sign = true;
1224     else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1225         server_conf.enforced_signing = true;
1226         rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1227         conn->sign = true;
1228     }
1229
1230     conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1231     ksmbd_conn_set_need_negotiate(work);
1232
1233 err_out:
1234     if (rc < 0)
1235         smb2_set_err_rsp(work);
1236
1237     return rc;
1238 }
1239
1240 static int alloc_preauth_hash(struct ksmbd_session *sess,
1241                   struct ksmbd_conn *conn)
1242 {
1243     if (sess->Preauth_HashValue)
1244         return 0;
1245
1246     sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1247                       PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1248     if (!sess->Preauth_HashValue)
1249         return -ENOMEM;
1250
1251     return 0;
1252 }
1253
1254 static int generate_preauth_hash(struct ksmbd_work *work)
1255 {
1256     struct ksmbd_conn *conn = work->conn;
1257     struct ksmbd_session *sess = work->sess;
1258     u8 *preauth_hash;
1259
1260     if (conn->dialect != SMB311_PROT_ID)
1261         return 0;
1262
1263     if (conn->binding) {
1264         struct preauth_session *preauth_sess;
1265
1266         preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1267         if (!preauth_sess) {
1268             preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1269             if (!preauth_sess)
1270                 return -ENOMEM;
1271         }
1272
1273         preauth_hash = preauth_sess->Preauth_HashValue;
1274     } else {
1275         if (!sess->Preauth_HashValue)
1276             if (alloc_preauth_hash(sess, conn))
1277                 return -ENOMEM;
1278         preauth_hash = sess->Preauth_HashValue;
1279     }
1280
1281     ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1282     return 0;
1283 }
1284
1285 static int decode_negotiation_token(struct ksmbd_conn *conn,
1286                     struct negotiate_message *negblob,
1287                     size_t sz)
1288 {
1289     if (!conn->use_spnego)
1290         return -EINVAL;
1291
1292     if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1293         if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1294             conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1295             conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1296             conn->use_spnego = false;
1297         }
1298     }
1299     return 0;
1300 }
1301
1302 static int ntlm_negotiate(struct ksmbd_work *work,
1303               struct negotiate_message *negblob,
1304               size_t negblob_len)
1305 {
1306     struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1307     struct challenge_message *chgblob;
1308     unsigned char *spnego_blob = NULL;
1309     u16 spnego_blob_len;
1310     char *neg_blob;
1311     int sz, rc;
1312
1313     ksmbd_debug(SMB, "negotiate phase\n");
1314     rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1315     if (rc)
1316         return rc;
1317
1318     sz = le16_to_cpu(rsp->SecurityBufferOffset);
1319     chgblob =
1320         (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
1321     memset(chgblob, 0, sizeof(struct challenge_message));
1322
1323     if (!work->conn->use_spnego) {
1324         sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1325         if (sz < 0)
1326             return -ENOMEM;
1327
1328         rsp->SecurityBufferLength = cpu_to_le16(sz);
1329         return 0;
1330     }
1331
1332     sz = sizeof(struct challenge_message);
1333     sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1334
1335     neg_blob = kzalloc(sz, GFP_KERNEL);
1336     if (!neg_blob)
1337         return -ENOMEM;
1338
1339     chgblob = (struct challenge_message *)neg_blob;
1340     sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1341     if (sz < 0) {
1342         rc = -ENOMEM;
1343         goto out;
1344     }
1345
1346     rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1347                        neg_blob, sz);
1348     if (rc) {
1349         rc = -ENOMEM;
1350         goto out;
1351     }
1352
1353     sz = le16_to_cpu(rsp->SecurityBufferOffset);
1354     memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1355     rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1356
1357 out:
1358     kfree(spnego_blob);
1359     kfree(neg_blob);
1360     return rc;
1361 }
1362
1363 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1364                           struct smb2_sess_setup_req *req)
1365 {
1366     int sz;
1367
1368     if (conn->use_spnego && conn->mechToken)
1369         return (struct authenticate_message *)conn->mechToken;
1370
1371     sz = le16_to_cpu(req->SecurityBufferOffset);
1372     return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1373                            + sz);
1374 }
1375
1376 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1377                        struct smb2_sess_setup_req *req)
1378 {
1379     struct authenticate_message *authblob;
1380     struct ksmbd_user *user;
1381     char *name;
1382     unsigned int auth_msg_len, name_off, name_len, secbuf_len;
1383
1384     secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1385     if (secbuf_len < sizeof(struct authenticate_message)) {
1386         ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1387         return NULL;
1388     }
1389     authblob = user_authblob(conn, req);
1390     name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1391     name_len = le16_to_cpu(authblob->UserName.Length);
1392     auth_msg_len = le16_to_cpu(req->SecurityBufferOffset) + secbuf_len;
1393
1394     if (auth_msg_len < (u64)name_off + name_len)
1395         return NULL;
1396
1397     name = smb_strndup_from_utf16((const char *)authblob + name_off,
1398                       name_len,
1399                       true,
1400                       conn->local_nls);
1401     if (IS_ERR(name)) {
1402         pr_err("cannot allocate memory\n");
1403         return NULL;
1404     }
1405
1406     ksmbd_debug(SMB, "session setup request for user %s\n", name);
1407     user = ksmbd_login_user(name);
1408     kfree(name);
1409     return user;
1410 }
1411
1412 static int ntlm_authenticate(struct ksmbd_work *work)
1413 {
1414     struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
1415     struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1416     struct ksmbd_conn *conn = work->conn;
1417     struct ksmbd_session *sess = work->sess;
1418     struct channel *chann = NULL;
1419     struct ksmbd_user *user;
1420     u64 prev_id;
1421     int sz, rc;
1422
1423     ksmbd_debug(SMB, "authenticate phase\n");
1424     if (conn->use_spnego) {
1425         unsigned char *spnego_blob;
1426         u16 spnego_blob_len;
1427
1428         rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1429                             &spnego_blob_len,
1430                             0);
1431         if (rc)
1432             return -ENOMEM;
1433
1434         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1435         memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1436         rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1437         kfree(spnego_blob);
1438         inc_rfc1001_len(work->response_buf, spnego_blob_len - 1);
1439     }
1440
1441     user = session_user(conn, req);
1442     if (!user) {
1443         ksmbd_debug(SMB, "Unknown user name or an error\n");
1444         return -EPERM;
1445     }
1446
1447     /* Check for previous session */
1448     prev_id = le64_to_cpu(req->PreviousSessionId);
1449     if (prev_id && prev_id != sess->id)
1450         destroy_previous_session(conn, user, prev_id);
1451
1452     if (sess->state == SMB2_SESSION_VALID) {
1453         /*
1454          * Reuse session if anonymous try to connect
1455          * on reauthetication.
1456          */
1457         if (ksmbd_anonymous_user(user)) {
1458             ksmbd_free_user(user);
1459             return 0;
1460         }
1461
1462         if (!ksmbd_compare_user(sess->user, user)) {
1463             ksmbd_free_user(user);
1464             return -EPERM;
1465         }
1466         ksmbd_free_user(user);
1467     } else {
1468         sess->user = user;
1469     }
1470
1471     if (user_guest(sess->user)) {
1472         rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1473     } else {
1474         struct authenticate_message *authblob;
1475
1476         authblob = user_authblob(conn, req);
1477         sz = le16_to_cpu(req->SecurityBufferLength);
1478         rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1479         if (rc) {
1480             set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1481             ksmbd_debug(SMB, "authentication failed\n");
1482             return -EPERM;
1483         }
1484     }
1485
1486     /*
1487      * If session state is SMB2_SESSION_VALID, We can assume
1488      * that it is reauthentication. And the user/password
1489      * has been verified, so return it here.
1490      */
1491     if (sess->state == SMB2_SESSION_VALID) {
1492         if (conn->binding)
1493             goto binding_session;
1494         return 0;
1495     }
1496
1497     if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1498          (conn->sign || server_conf.enforced_signing)) ||
1499         (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1500         sess->sign = true;
1501
1502     if (smb3_encryption_negotiated(conn) &&
1503             !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1504         rc = conn->ops->generate_encryptionkey(conn, sess);
1505         if (rc) {
1506             ksmbd_debug(SMB,
1507                     "SMB3 encryption key generation failed\n");
1508             return -EINVAL;
1509         }
1510         sess->enc = true;
1511         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1512         /*
1513          * signing is disable if encryption is enable
1514          * on this session
1515          */
1516         sess->sign = false;
1517     }
1518
1519 binding_session:
1520     if (conn->dialect >= SMB30_PROT_ID) {
1521         read_lock(&sess->chann_lock);
1522         chann = lookup_chann_list(sess, conn);
1523         read_unlock(&sess->chann_lock);
1524         if (!chann) {
1525             chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1526             if (!chann)
1527                 return -ENOMEM;
1528
1529             chann->conn = conn;
1530             INIT_LIST_HEAD(&chann->chann_list);
1531             write_lock(&sess->chann_lock);
1532             list_add(&chann->chann_list, &sess->ksmbd_chann_list);
1533             write_unlock(&sess->chann_lock);
1534         }
1535     }
1536
1537     if (conn->ops->generate_signingkey) {
1538         rc = conn->ops->generate_signingkey(sess, conn);
1539         if (rc) {
1540             ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1541             return -EINVAL;
1542         }
1543     }
1544
1545     if (!ksmbd_conn_lookup_dialect(conn)) {
1546         pr_err("fail to verify the dialect\n");
1547         return -ENOENT;
1548     }
1549     return 0;
1550 }
1551
1552 #ifdef CONFIG_SMB_SERVER_KERBEROS5
1553 static int krb5_authenticate(struct ksmbd_work *work)
1554 {
1555     struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
1556     struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1557     struct ksmbd_conn *conn = work->conn;
1558     struct ksmbd_session *sess = work->sess;
1559     char *in_blob, *out_blob;
1560     struct channel *chann = NULL;
1561     u64 prev_sess_id;
1562     int in_len, out_len;
1563     int retval;
1564
1565     in_blob = (char *)&req->hdr.ProtocolId +
1566         le16_to_cpu(req->SecurityBufferOffset);
1567     in_len = le16_to_cpu(req->SecurityBufferLength);
1568     out_blob = (char *)&rsp->hdr.ProtocolId +
1569         le16_to_cpu(rsp->SecurityBufferOffset);
1570     out_len = work->response_sz -
1571         (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1572
1573     /* Check previous session */
1574     prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1575     if (prev_sess_id && prev_sess_id != sess->id)
1576         destroy_previous_session(conn, sess->user, prev_sess_id);
1577
1578     if (sess->state == SMB2_SESSION_VALID)
1579         ksmbd_free_user(sess->user);
1580
1581     retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1582                      out_blob, &out_len);
1583     if (retval) {
1584         ksmbd_debug(SMB, "krb5 authentication failed\n");
1585         return -EINVAL;
1586     }
1587     rsp->SecurityBufferLength = cpu_to_le16(out_len);
1588     inc_rfc1001_len(work->response_buf, out_len - 1);
1589
1590     if ((conn->sign || server_conf.enforced_signing) ||
1591         (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1592         sess->sign = true;
1593
1594     if (smb3_encryption_negotiated(conn)) {
1595         retval = conn->ops->generate_encryptionkey(conn, sess);
1596         if (retval) {
1597             ksmbd_debug(SMB,
1598                     "SMB3 encryption key generation failed\n");
1599             return -EINVAL;
1600         }
1601         sess->enc = true;
1602         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1603         sess->sign = false;
1604     }
1605
1606     if (conn->dialect >= SMB30_PROT_ID) {
1607         read_lock(&sess->chann_lock);
1608         chann = lookup_chann_list(sess, conn);
1609         read_unlock(&sess->chann_lock);
1610         if (!chann) {
1611             chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1612             if (!chann)
1613                 return -ENOMEM;
1614
1615             chann->conn = conn;
1616             INIT_LIST_HEAD(&chann->chann_list);
1617             write_lock(&sess->chann_lock);
1618             list_add(&chann->chann_list, &sess->ksmbd_chann_list);
1619             write_unlock(&sess->chann_lock);
1620         }
1621     }
1622
1623     if (conn->ops->generate_signingkey) {
1624         retval = conn->ops->generate_signingkey(sess, conn);
1625         if (retval) {
1626             ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1627             return -EINVAL;
1628         }
1629     }
1630
1631     if (!ksmbd_conn_lookup_dialect(conn)) {
1632         pr_err("fail to verify the dialect\n");
1633         return -ENOENT;
1634     }
1635     return 0;
1636 }
1637 #else
1638 static int krb5_authenticate(struct ksmbd_work *work)
1639 {
1640     return -EOPNOTSUPP;
1641 }
1642 #endif
1643
1644 int smb2_sess_setup(struct ksmbd_work *work)
1645 {
1646     struct ksmbd_conn *conn = work->conn;
1647     struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
1648     struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1649     struct ksmbd_session *sess;
1650     struct negotiate_message *negblob;
1651     unsigned int negblob_len, negblob_off;
1652     int rc = 0;
1653
1654     ksmbd_debug(SMB, "Received request for session setup\n");
1655
1656     rsp->StructureSize = cpu_to_le16(9);
1657     rsp->SessionFlags = 0;
1658     rsp->SecurityBufferOffset = cpu_to_le16(72);
1659     rsp->SecurityBufferLength = 0;
1660     inc_rfc1001_len(work->response_buf, 9);
1661
1662     if (!req->hdr.SessionId) {
1663         sess = ksmbd_smb2_session_create();
1664         if (!sess) {
1665             rc = -ENOMEM;
1666             goto out_err;
1667         }
1668         rsp->hdr.SessionId = cpu_to_le64(sess->id);
1669         rc = ksmbd_session_register(conn, sess);
1670         if (rc)
1671             goto out_err;
1672     } else if (conn->dialect >= SMB30_PROT_ID &&
1673            (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1674            req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1675         u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1676
1677         sess = ksmbd_session_lookup_slowpath(sess_id);
1678         if (!sess) {
1679             rc = -ENOENT;
1680             goto out_err;
1681         }
1682
1683         if (conn->dialect != sess->dialect) {
1684             rc = -EINVAL;
1685             goto out_err;
1686         }
1687
1688         if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1689             rc = -EINVAL;
1690             goto out_err;
1691         }
1692
1693         if (strncmp(conn->ClientGUID, sess->ClientGUID,
1694                 SMB2_CLIENT_GUID_SIZE)) {
1695             rc = -ENOENT;
1696             goto out_err;
1697         }
1698
1699         if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1700             rc = -EACCES;
1701             goto out_err;
1702         }
1703
1704         if (sess->state == SMB2_SESSION_EXPIRED) {
1705             rc = -EFAULT;
1706             goto out_err;
1707         }
1708
1709         if (ksmbd_session_lookup(conn, sess_id)) {
1710             rc = -EACCES;
1711             goto out_err;
1712         }
1713
1714         conn->binding = true;
1715     } else if ((conn->dialect < SMB30_PROT_ID ||
1716             server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1717            (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1718         sess = NULL;
1719         rc = -EACCES;
1720         goto out_err;
1721     } else {
1722         sess = ksmbd_session_lookup(conn,
1723                         le64_to_cpu(req->hdr.SessionId));
1724         if (!sess) {
1725             rc = -ENOENT;
1726             goto out_err;
1727         }
1728     }
1729     work->sess = sess;
1730
1731     if (sess->state == SMB2_SESSION_EXPIRED)
1732         sess->state = SMB2_SESSION_IN_PROGRESS;
1733
1734     negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1735     negblob_len = le16_to_cpu(req->SecurityBufferLength);
1736     if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer) ||
1737         negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1738         rc = -EINVAL;
1739         goto out_err;
1740     }
1741
1742     negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1743             negblob_off);
1744
1745     if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1746         if (conn->mechToken)
1747             negblob = (struct negotiate_message *)conn->mechToken;
1748     }
1749
1750     if (server_conf.auth_mechs & conn->auth_mechs) {
1751         rc = generate_preauth_hash(work);
1752         if (rc)
1753             goto out_err;
1754
1755         if (conn->preferred_auth_mech &
1756                 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1757             rc = krb5_authenticate(work);
1758             if (rc) {
1759                 rc = -EINVAL;
1760                 goto out_err;
1761             }
1762
1763             ksmbd_conn_set_good(work);
1764             sess->state = SMB2_SESSION_VALID;
1765             kfree(sess->Preauth_HashValue);
1766             sess->Preauth_HashValue = NULL;
1767         } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1768             if (negblob->MessageType == NtLmNegotiate) {
1769                 rc = ntlm_negotiate(work, negblob, negblob_len);
1770                 if (rc)
1771                     goto out_err;
1772                 rsp->hdr.Status =
1773                     STATUS_MORE_PROCESSING_REQUIRED;
1774                 /*
1775                  * Note: here total size -1 is done as an
1776                  * adjustment for 0 size blob
1777                  */
1778                 inc_rfc1001_len(work->response_buf,
1779                         le16_to_cpu(rsp->SecurityBufferLength) - 1);
1780
1781             } else if (negblob->MessageType == NtLmAuthenticate) {
1782                 rc = ntlm_authenticate(work);
1783                 if (rc)
1784                     goto out_err;
1785
1786                 ksmbd_conn_set_good(work);
1787                 sess->state = SMB2_SESSION_VALID;
1788                 if (conn->binding) {
1789                     struct preauth_session *preauth_sess;
1790
1791                     preauth_sess =
1792                         ksmbd_preauth_session_lookup(conn, sess->id);
1793                     if (preauth_sess) {
1794                         list_del(&preauth_sess->preauth_entry);
1795                         kfree(preauth_sess);
1796                     }
1797                 }
1798                 kfree(sess->Preauth_HashValue);
1799                 sess->Preauth_HashValue = NULL;
1800             }
1801         } else {
1802             /* TODO: need one more negotiation */
1803             pr_err("Not support the preferred authentication\n");
1804             rc = -EINVAL;
1805         }
1806     } else {
1807         pr_err("Not support authentication\n");
1808         rc = -EINVAL;
1809     }
1810
1811 out_err:
1812     if (rc == -EINVAL)
1813         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1814     else if (rc == -ENOENT)
1815         rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1816     else if (rc == -EACCES)
1817         rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1818     else if (rc == -EFAULT)
1819         rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1820     else if (rc == -ENOMEM)
1821         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1822     else if (rc)
1823         rsp->hdr.Status = STATUS_LOGON_FAILURE;
1824
1825     if (conn->use_spnego && conn->mechToken) {
1826         kfree(conn->mechToken);
1827         conn->mechToken = NULL;
1828     }
1829
1830     if (rc < 0) {
1831         /*
1832          * SecurityBufferOffset should be set to zero
1833          * in session setup error response.
1834          */
1835         rsp->SecurityBufferOffset = 0;
1836
1837         if (sess) {
1838             bool try_delay = false;
1839
1840             /*
1841              * To avoid dictionary attacks (repeated session setups rapidly sent) to
1842              * connect to server, ksmbd make a delay of a 5 seconds on session setup
1843              * failure to make it harder to send enough random connection requests
1844              * to break into a server.
1845              */
1846             if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1847                 try_delay = true;
1848
1849             xa_erase(&conn->sessions, sess->id);
1850             ksmbd_session_destroy(sess);
1851             work->sess = NULL;
1852             if (try_delay)
1853                 ssleep(5);
1854         }
1855     }
1856
1857     return rc;
1858 }
1859
1860 /**
1861  * smb2_tree_connect() - handler for smb2 tree connect command
1862  * @work:   smb work containing smb request buffer
1863  *
1864  * Return:      0 on success, otherwise error
1865  */
1866 int smb2_tree_connect(struct ksmbd_work *work)
1867 {
1868     struct ksmbd_conn *conn = work->conn;
1869     struct smb2_tree_connect_req *req = smb2_get_msg(work->request_buf);
1870     struct smb2_tree_connect_rsp *rsp = smb2_get_msg(work->response_buf);
1871     struct ksmbd_session *sess = work->sess;
1872     char *treename = NULL, *name = NULL;
1873     struct ksmbd_tree_conn_status status;
1874     struct ksmbd_share_config *share;
1875     int rc = -EINVAL;
1876
1877     treename = smb_strndup_from_utf16(req->Buffer,
1878                       le16_to_cpu(req->PathLength), true,
1879                       conn->local_nls);
1880     if (IS_ERR(treename)) {
1881         pr_err("treename is NULL\n");
1882         status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1883         goto out_err1;
1884     }
1885
1886     name = ksmbd_extract_sharename(treename);
1887     if (IS_ERR(name)) {
1888         status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1889         goto out_err1;
1890     }
1891
1892     ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1893             name, treename);
1894
1895     status = ksmbd_tree_conn_connect(conn, sess, name);
1896     if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1897         rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1898     else
1899         goto out_err1;
1900
1901     share = status.tree_conn->share_conf;
1902     if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1903         ksmbd_debug(SMB, "IPC share path request\n");
1904         rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1905         rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1906             FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1907             FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1908             FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1909             FILE_SYNCHRONIZE_LE;
1910     } else {
1911         rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1912         rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1913             FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1914         if (test_tree_conn_flag(status.tree_conn,
1915                     KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1916             rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1917                 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1918                 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1919                 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1920                 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1921                 FILE_SYNCHRONIZE_LE;
1922         }
1923     }
1924
1925     status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1926     if (conn->posix_ext_supported)
1927         status.tree_conn->posix_extensions = true;
1928
1929 out_err1:
1930     rsp->StructureSize = cpu_to_le16(16);
1931     rsp->Capabilities = 0;
1932     rsp->Reserved = 0;
1933     /* default manual caching */
1934     rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
1935     inc_rfc1001_len(work->response_buf, 16);
1936
1937     if (!IS_ERR(treename))
1938         kfree(treename);
1939     if (!IS_ERR(name))
1940         kfree(name);
1941
1942     switch (status.ret) {
1943     case KSMBD_TREE_CONN_STATUS_OK:
1944         rsp->hdr.Status = STATUS_SUCCESS;
1945         rc = 0;
1946         break;
1947     case -ESTALE:
1948     case -ENOENT:
1949     case KSMBD_TREE_CONN_STATUS_NO_SHARE:
1950         rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
1951         break;
1952     case -ENOMEM:
1953     case KSMBD_TREE_CONN_STATUS_NOMEM:
1954         rsp->hdr.Status = STATUS_NO_MEMORY;
1955         break;
1956     case KSMBD_TREE_CONN_STATUS_ERROR:
1957     case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
1958     case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
1959         rsp->hdr.Status = STATUS_ACCESS_DENIED;
1960         break;
1961     case -EINVAL:
1962         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1963         break;
1964     default:
1965         rsp->hdr.Status = STATUS_ACCESS_DENIED;
1966     }
1967
1968     return rc;
1969 }
1970
1971 /**
1972  * smb2_create_open_flags() - convert smb open flags to unix open flags
1973  * @file_present:   is file already present
1974  * @access:     file access flags
1975  * @disposition:    file disposition flags
1976  * @may_flags:      set with MAY_ flags
1977  *
1978  * Return:      file open flags
1979  */
1980 static int smb2_create_open_flags(bool file_present, __le32 access,
1981                   __le32 disposition,
1982                   int *may_flags)
1983 {
1984     int oflags = O_NONBLOCK | O_LARGEFILE;
1985
1986     if (access & FILE_READ_DESIRED_ACCESS_LE &&
1987         access & FILE_WRITE_DESIRE_ACCESS_LE) {
1988         oflags |= O_RDWR;
1989         *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
1990     } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
1991         oflags |= O_WRONLY;
1992         *may_flags = MAY_OPEN | MAY_WRITE;
1993     } else {
1994         oflags |= O_RDONLY;
1995         *may_flags = MAY_OPEN | MAY_READ;
1996     }
1997
1998     if (access == FILE_READ_ATTRIBUTES_LE)
1999         oflags |= O_PATH;
2000
2001     if (file_present) {
2002         switch (disposition & FILE_CREATE_MASK_LE) {
2003         case FILE_OPEN_LE:
2004         case FILE_CREATE_LE:
2005             break;
2006         case FILE_SUPERSEDE_LE:
2007         case FILE_OVERWRITE_LE:
2008         case FILE_OVERWRITE_IF_LE:
2009             oflags |= O_TRUNC;
2010             break;
2011         default:
2012             break;
2013         }
2014     } else {
2015         switch (disposition & FILE_CREATE_MASK_LE) {
2016         case FILE_SUPERSEDE_LE:
2017         case FILE_CREATE_LE:
2018         case FILE_OPEN_IF_LE:
2019         case FILE_OVERWRITE_IF_LE:
2020             oflags |= O_CREAT;
2021             break;
2022         case FILE_OPEN_LE:
2023         case FILE_OVERWRITE_LE:
2024             oflags &= ~O_CREAT;
2025             break;
2026         default:
2027             break;
2028         }
2029     }
2030
2031     return oflags;
2032 }
2033
2034 /**
2035  * smb2_tree_disconnect() - handler for smb tree connect request
2036  * @work:   smb work containing request buffer
2037  *
2038  * Return:      0
2039  */
2040 int smb2_tree_disconnect(struct ksmbd_work *work)
2041 {
2042     struct smb2_tree_disconnect_rsp *rsp = smb2_get_msg(work->response_buf);
2043     struct ksmbd_session *sess = work->sess;
2044     struct ksmbd_tree_connect *tcon = work->tcon;
2045
2046     rsp->StructureSize = cpu_to_le16(4);
2047     inc_rfc1001_len(work->response_buf, 4);
2048
2049     ksmbd_debug(SMB, "request\n");
2050
2051     if (!tcon) {
2052         struct smb2_tree_disconnect_req *req =
2053             smb2_get_msg(work->request_buf);
2054
2055         ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2056         rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2057         smb2_set_err_rsp(work);
2058         return 0;
2059     }
2060
2061     ksmbd_close_tree_conn_fds(work);
2062     ksmbd_tree_conn_disconnect(sess, tcon);
2063     work->tcon = NULL;
2064     return 0;
2065 }
2066
2067 /**
2068  * smb2_session_logoff() - handler for session log off request
2069  * @work:   smb work containing request buffer
2070  *
2071  * Return:      0
2072  */
2073 int smb2_session_logoff(struct ksmbd_work *work)
2074 {
2075     struct ksmbd_conn *conn = work->conn;
2076     struct smb2_logoff_rsp *rsp = smb2_get_msg(work->response_buf);
2077     struct ksmbd_session *sess = work->sess;
2078
2079     rsp->StructureSize = cpu_to_le16(4);
2080     inc_rfc1001_len(work->response_buf, 4);
2081
2082     ksmbd_debug(SMB, "request\n");
2083
2084     /* setting CifsExiting here may race with start_tcp_sess */
2085     ksmbd_conn_set_need_reconnect(work);
2086     ksmbd_close_session_fds(work);
2087     ksmbd_conn_wait_idle(conn);
2088
2089     if (ksmbd_tree_conn_session_logoff(sess)) {
2090         struct smb2_logoff_req *req = smb2_get_msg(work->request_buf);
2091
2092         ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2093         rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2094         smb2_set_err_rsp(work);
2095         return 0;
2096     }
2097
2098     ksmbd_destroy_file_table(&sess->file_table);
2099     sess->state = SMB2_SESSION_EXPIRED;
2100
2101     ksmbd_free_user(sess->user);
2102     sess->user = NULL;
2103
2104     /* let start_tcp_sess free connection info now */
2105     ksmbd_conn_set_need_negotiate(work);
2106     return 0;
2107 }
2108
2109 /**
2110  * create_smb2_pipe() - create IPC pipe
2111  * @work:   smb work containing request buffer
2112  *
2113  * Return:      0 on success, otherwise error
2114  */
2115 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2116 {
2117     struct smb2_create_rsp *rsp = smb2_get_msg(work->response_buf);
2118     struct smb2_create_req *req = smb2_get_msg(work->request_buf);
2119     int id;
2120     int err;
2121     char *name;
2122
2123     name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2124                       1, work->conn->local_nls);
2125     if (IS_ERR(name)) {
2126         rsp->hdr.Status = STATUS_NO_MEMORY;
2127         err = PTR_ERR(name);
2128         goto out;
2129     }
2130
2131     id = ksmbd_session_rpc_open(work->sess, name);
2132     if (id < 0) {
2133         pr_err("Unable to open RPC pipe: %d\n", id);
2134         err = id;
2135         goto out;
2136     }
2137
2138     rsp->hdr.Status = STATUS_SUCCESS;
2139     rsp->StructureSize = cpu_to_le16(89);
2140     rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2141     rsp->Flags = 0;
2142     rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2143
2144     rsp->CreationTime = cpu_to_le64(0);
2145     rsp->LastAccessTime = cpu_to_le64(0);
2146     rsp->ChangeTime = cpu_to_le64(0);
2147     rsp->AllocationSize = cpu_to_le64(0);
2148     rsp->EndofFile = cpu_to_le64(0);
2149     rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2150     rsp->Reserved2 = 0;
2151     rsp->VolatileFileId = id;
2152     rsp->PersistentFileId = 0;
2153     rsp->CreateContextsOffset = 0;
2154     rsp->CreateContextsLength = 0;
2155
2156     inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/
2157     kfree(name);
2158     return 0;
2159
2160 out:
2161     switch (err) {
2162     case -EINVAL:
2163         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2164         break;
2165     case -ENOSPC:
2166     case -ENOMEM:
2167         rsp->hdr.Status = STATUS_NO_MEMORY;
2168         break;
2169     }
2170
2171     if (!IS_ERR(name))
2172         kfree(name);
2173
2174     smb2_set_err_rsp(work);
2175     return err;
2176 }
2177
2178 /**
2179  * smb2_set_ea() - handler for setting extended attributes using set
2180  *      info command
2181  * @eabuf:  set info command buffer
2182  * @buf_len:    set info command buffer length
2183  * @path:   dentry path for get ea
2184  *
2185  * Return:  0 on success, otherwise error
2186  */
2187 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2188                struct path *path)
2189 {
2190     struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2191     char *attr_name = NULL, *value;
2192     int rc = 0;
2193     unsigned int next = 0;
2194
2195     if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2196             le16_to_cpu(eabuf->EaValueLength))
2197         return -EINVAL;
2198
2199     attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2200     if (!attr_name)
2201         return -ENOMEM;
2202
2203     do {
2204         if (!eabuf->EaNameLength)
2205             goto next;
2206
2207         ksmbd_debug(SMB,
2208                 "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2209                 eabuf->name, eabuf->EaNameLength,
2210                 le16_to_cpu(eabuf->EaValueLength),
2211                 le32_to_cpu(eabuf->NextEntryOffset));
2212
2213         if (eabuf->EaNameLength >
2214             (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2215             rc = -EINVAL;
2216             break;
2217         }
2218
2219         memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2220         memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2221                eabuf->EaNameLength);
2222         attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2223         value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2224
2225         if (!eabuf->EaValueLength) {
2226             rc = ksmbd_vfs_casexattr_len(user_ns,
2227                              path->dentry,
2228                              attr_name,
2229                              XATTR_USER_PREFIX_LEN +
2230                              eabuf->EaNameLength);
2231
2232             /* delete the EA only when it exits */
2233             if (rc > 0) {
2234                 rc = ksmbd_vfs_remove_xattr(user_ns,
2235                                 path->dentry,
2236                                 attr_name);
2237
2238                 if (rc < 0) {
2239                     ksmbd_debug(SMB,
2240                             "remove xattr failed(%d)\n",
2241                             rc);
2242                     break;
2243                 }
2244             }
2245
2246             /* if the EA doesn't exist, just do nothing. */
2247             rc = 0;
2248         } else {
2249             rc = ksmbd_vfs_setxattr(user_ns,
2250                         path->dentry, attr_name, value,
2251                         le16_to_cpu(eabuf->EaValueLength), 0);
2252             if (rc < 0) {
2253                 ksmbd_debug(SMB,
2254                         "ksmbd_vfs_setxattr is failed(%d)\n",
2255                         rc);
2256                 break;
2257             }
2258         }
2259
2260 next:
2261         next = le32_to_cpu(eabuf->NextEntryOffset);
2262         if (next == 0 || buf_len < next)
2263             break;
2264         buf_len -= next;
2265         eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2266         if (next < (u32)eabuf->EaNameLength + le16_to_cpu(eabuf->EaValueLength))
2267             break;
2268
2269     } while (next != 0);
2270
2271     kfree(attr_name);
2272     return rc;
2273 }
2274
2275 static noinline int smb2_set_stream_name_xattr(struct path *path,
2276                            struct ksmbd_file *fp,
2277                            char *stream_name, int s_type)
2278 {
2279     struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2280     size_t xattr_stream_size;
2281     char *xattr_stream_name;
2282     int rc;
2283
2284     rc = ksmbd_vfs_xattr_stream_name(stream_name,
2285                      &xattr_stream_name,
2286                      &xattr_stream_size,
2287                      s_type);
2288     if (rc)
2289         return rc;
2290
2291     fp->stream.name = xattr_stream_name;
2292     fp->stream.size = xattr_stream_size;
2293
2294     /* Check if there is stream prefix in xattr space */
2295     rc = ksmbd_vfs_casexattr_len(user_ns,
2296                      path->dentry,
2297                      xattr_stream_name,
2298                      xattr_stream_size);
2299     if (rc >= 0)
2300         return 0;
2301
2302     if (fp->cdoption == FILE_OPEN_LE) {
2303         ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2304         return -EBADF;
2305     }
2306
2307     rc = ksmbd_vfs_setxattr(user_ns, path->dentry,
2308                 xattr_stream_name, NULL, 0, 0);
2309     if (rc < 0)
2310         pr_err("Failed to store XATTR stream name :%d\n", rc);
2311     return 0;
2312 }
2313
2314 static int smb2_remove_smb_xattrs(struct path *path)
2315 {
2316     struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2317     char *name, *xattr_list = NULL;
2318     ssize_t xattr_list_len;
2319     int err = 0;
2320
2321     xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2322     if (xattr_list_len < 0) {
2323         goto out;
2324     } else if (!xattr_list_len) {
2325         ksmbd_debug(SMB, "empty xattr in the file\n");
2326         goto out;
2327     }
2328
2329     for (name = xattr_list; name - xattr_list < xattr_list_len;
2330             name += strlen(name) + 1) {
2331         ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2332
2333         if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2334             !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2335                  STREAM_PREFIX_LEN)) {
2336             err = ksmbd_vfs_remove_xattr(user_ns, path->dentry,
2337                              name);
2338             if (err)
2339                 ksmbd_debug(SMB, "remove xattr failed : %s\n",
2340                         name);
2341         }
2342     }
2343 out:
2344     kvfree(xattr_list);
2345     return err;
2346 }
2347
2348 static int smb2_create_truncate(struct path *path)
2349 {
2350     int rc = vfs_truncate(path, 0);
2351
2352     if (rc) {
2353         pr_err("vfs_truncate failed, rc %d\n", rc);
2354         return rc;
2355     }
2356
2357     rc = smb2_remove_smb_xattrs(path);
2358     if (rc == -EOPNOTSUPP)
2359         rc = 0;
2360     if (rc)
2361         ksmbd_debug(SMB,
2362                 "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2363                 rc);
2364     return rc;
2365 }
2366
2367 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, struct path *path,
2368                 struct ksmbd_file *fp)
2369 {
2370     struct xattr_dos_attrib da = {0};
2371     int rc;
2372
2373     if (!test_share_config_flag(tcon->share_conf,
2374                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2375         return;
2376
2377     da.version = 4;
2378     da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2379     da.itime = da.create_time = fp->create_time;
2380     da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2381         XATTR_DOSINFO_ITIME;
2382
2383     rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_user_ns(path->mnt),
2384                         path->dentry, &da);
2385     if (rc)
2386         ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2387 }
2388
2389 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2390                    struct path *path, struct ksmbd_file *fp)
2391 {
2392     struct xattr_dos_attrib da;
2393     int rc;
2394
2395     fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2396
2397     /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2398     if (!test_share_config_flag(tcon->share_conf,
2399                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2400         return;
2401
2402     rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_user_ns(path->mnt),
2403                         path->dentry, &da);
2404     if (rc > 0) {
2405         fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2406         fp->create_time = da.create_time;
2407         fp->itime = da.itime;
2408     }
2409 }
2410
2411 static int smb2_creat(struct ksmbd_work *work, struct path *path, char *name,
2412               int open_flags, umode_t posix_mode, bool is_dir)
2413 {
2414     struct ksmbd_tree_connect *tcon = work->tcon;
2415     struct ksmbd_share_config *share = tcon->share_conf;
2416     umode_t mode;
2417     int rc;
2418
2419     if (!(open_flags & O_CREAT))
2420         return -EBADF;
2421
2422     ksmbd_debug(SMB, "file does not exist, so creating\n");
2423     if (is_dir == true) {
2424         ksmbd_debug(SMB, "creating directory\n");
2425
2426         mode = share_config_directory_mode(share, posix_mode);
2427         rc = ksmbd_vfs_mkdir(work, name, mode);
2428         if (rc)
2429             return rc;
2430     } else {
2431         ksmbd_debug(SMB, "creating regular file\n");
2432
2433         mode = share_config_create_mode(share, posix_mode);
2434         rc = ksmbd_vfs_create(work, name, mode);
2435         if (rc)
2436             return rc;
2437     }
2438
2439     rc = ksmbd_vfs_kern_path(work, name, 0, path, 0);
2440     if (rc) {
2441         pr_err("cannot get linux path (%s), err = %d\n",
2442                name, rc);
2443         return rc;
2444     }
2445     return 0;
2446 }
2447
2448 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2449                  struct smb2_create_req *req,
2450                  struct path *path)
2451 {
2452     struct create_context *context;
2453     struct create_sd_buf_req *sd_buf;
2454
2455     if (!req->CreateContextsOffset)
2456         return -ENOENT;
2457
2458     /* Parse SD BUFFER create contexts */
2459     context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER);
2460     if (!context)
2461         return -ENOENT;
2462     else if (IS_ERR(context))
2463         return PTR_ERR(context);
2464
2465     ksmbd_debug(SMB,
2466             "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2467     sd_buf = (struct create_sd_buf_req *)context;
2468     if (le16_to_cpu(context->DataOffset) +
2469         le32_to_cpu(context->DataLength) <
2470         sizeof(struct create_sd_buf_req))
2471         return -EINVAL;
2472     return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2473                 le32_to_cpu(sd_buf->ccontext.DataLength), true);
2474 }
2475
2476 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2477                  struct user_namespace *mnt_userns,
2478                  struct inode *inode)
2479 {
2480     fattr->cf_uid = i_uid_into_mnt(mnt_userns, inode);
2481     fattr->cf_gid = i_gid_into_mnt(mnt_userns, inode);
2482     fattr->cf_mode = inode->i_mode;
2483     fattr->cf_acls = NULL;
2484     fattr->cf_dacls = NULL;
2485
2486     if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2487         fattr->cf_acls = get_acl(inode, ACL_TYPE_ACCESS);
2488         if (S_ISDIR(inode->i_mode))
2489             fattr->cf_dacls = get_acl(inode, ACL_TYPE_DEFAULT);
2490     }
2491 }
2492
2493 /**
2494  * smb2_open() - handler for smb file open request
2495  * @work:   smb work containing request buffer
2496  *
2497  * Return:      0 on success, otherwise error
2498  */
2499 int smb2_open(struct ksmbd_work *work)
2500 {
2501     struct ksmbd_conn *conn = work->conn;
2502     struct ksmbd_session *sess = work->sess;
2503     struct ksmbd_tree_connect *tcon = work->tcon;
2504     struct smb2_create_req *req;
2505     struct smb2_create_rsp *rsp;
2506     struct path path;
2507     struct ksmbd_share_config *share = tcon->share_conf;
2508     struct ksmbd_file *fp = NULL;
2509     struct file *filp = NULL;
2510     struct user_namespace *user_ns = NULL;
2511     struct kstat stat;
2512     struct create_context *context;
2513     struct lease_ctx_info *lc = NULL;
2514     struct create_ea_buf_req *ea_buf = NULL;
2515     struct oplock_info *opinfo;
2516     __le32 *next_ptr = NULL;
2517     int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2518     int rc = 0;
2519     int contxt_cnt = 0, query_disk_id = 0;
2520     int maximal_access_ctxt = 0, posix_ctxt = 0;
2521     int s_type = 0;
2522     int next_off = 0;
2523     char *name = NULL;
2524     char *stream_name = NULL;
2525     bool file_present = false, created = false, already_permitted = false;
2526     int share_ret, need_truncate = 0;
2527     u64 time;
2528     umode_t posix_mode = 0;
2529     __le32 daccess, maximal_access = 0;
2530
2531     WORK_BUFFERS(work, req, rsp);
2532
2533     if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2534         (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2535         ksmbd_debug(SMB, "invalid flag in chained command\n");
2536         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2537         smb2_set_err_rsp(work);
2538         return -EINVAL;
2539     }
2540
2541     if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2542         ksmbd_debug(SMB, "IPC pipe create request\n");
2543         return create_smb2_pipe(work);
2544     }
2545
2546     if (req->NameLength) {
2547         if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2548             *(char *)req->Buffer == '\\') {
2549             pr_err("not allow directory name included leading slash\n");
2550             rc = -EINVAL;
2551             goto err_out1;
2552         }
2553
2554         name = smb2_get_name(req->Buffer,
2555                      le16_to_cpu(req->NameLength),
2556                      work->conn->local_nls);
2557         if (IS_ERR(name)) {
2558             rc = PTR_ERR(name);
2559             if (rc != -ENOMEM)
2560                 rc = -ENOENT;
2561             name = NULL;
2562             goto err_out1;
2563         }
2564
2565         ksmbd_debug(SMB, "converted name = %s\n", name);
2566         if (strchr(name, ':')) {
2567             if (!test_share_config_flag(work->tcon->share_conf,
2568                             KSMBD_SHARE_FLAG_STREAMS)) {
2569                 rc = -EBADF;
2570                 goto err_out1;
2571             }
2572             rc = parse_stream_name(name, &stream_name, &s_type);
2573             if (rc < 0)
2574                 goto err_out1;
2575         }
2576
2577         rc = ksmbd_validate_filename(name);
2578         if (rc < 0)
2579             goto err_out1;
2580
2581         if (ksmbd_share_veto_filename(share, name)) {
2582             rc = -ENOENT;
2583             ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2584                     name);
2585             goto err_out1;
2586         }
2587     } else {
2588         name = kstrdup("", GFP_KERNEL);
2589         if (!name) {
2590             rc = -ENOMEM;
2591             goto err_out1;
2592         }
2593     }
2594
2595     req_op_level = req->RequestedOplockLevel;
2596     if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
2597         lc = parse_lease_state(req);
2598
2599     if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2600         pr_err("Invalid impersonationlevel : 0x%x\n",
2601                le32_to_cpu(req->ImpersonationLevel));
2602         rc = -EIO;
2603         rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2604         goto err_out1;
2605     }
2606
2607     if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2608         pr_err("Invalid create options : 0x%x\n",
2609                le32_to_cpu(req->CreateOptions));
2610         rc = -EINVAL;
2611         goto err_out1;
2612     } else {
2613         if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2614             req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2615             req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2616
2617         if (req->CreateOptions &
2618             (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2619              FILE_RESERVE_OPFILTER_LE)) {
2620             rc = -EOPNOTSUPP;
2621             goto err_out1;
2622         }
2623
2624         if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2625             if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2626                 rc = -EINVAL;
2627                 goto err_out1;
2628             } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2629                 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2630             }
2631         }
2632     }
2633
2634     if (le32_to_cpu(req->CreateDisposition) >
2635         le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2636         pr_err("Invalid create disposition : 0x%x\n",
2637                le32_to_cpu(req->CreateDisposition));
2638         rc = -EINVAL;
2639         goto err_out1;
2640     }
2641
2642     if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2643         pr_err("Invalid desired access : 0x%x\n",
2644                le32_to_cpu(req->DesiredAccess));
2645         rc = -EACCES;
2646         goto err_out1;
2647     }
2648
2649     if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
2650         pr_err("Invalid file attribute : 0x%x\n",
2651                le32_to_cpu(req->FileAttributes));
2652         rc = -EINVAL;
2653         goto err_out1;
2654     }
2655
2656     if (req->CreateContextsOffset) {
2657         /* Parse non-durable handle create contexts */
2658         context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER);
2659         if (IS_ERR(context)) {
2660             rc = PTR_ERR(context);
2661             goto err_out1;
2662         } else if (context) {
2663             ea_buf = (struct create_ea_buf_req *)context;
2664             if (le16_to_cpu(context->DataOffset) +
2665                 le32_to_cpu(context->DataLength) <
2666                 sizeof(struct create_ea_buf_req)) {
2667                 rc = -EINVAL;
2668                 goto err_out1;
2669             }
2670             if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
2671                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2672                 rc = -EACCES;
2673                 goto err_out1;
2674             }
2675         }
2676
2677         context = smb2_find_context_vals(req,
2678                          SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST);
2679         if (IS_ERR(context)) {
2680             rc = PTR_ERR(context);
2681             goto err_out1;
2682         } else if (context) {
2683             ksmbd_debug(SMB,
2684                     "get query maximal access context\n");
2685             maximal_access_ctxt = 1;
2686         }
2687
2688         context = smb2_find_context_vals(req,
2689                          SMB2_CREATE_TIMEWARP_REQUEST);
2690         if (IS_ERR(context)) {
2691             rc = PTR_ERR(context);
2692             goto err_out1;
2693         } else if (context) {
2694             ksmbd_debug(SMB, "get timewarp context\n");
2695             rc = -EBADF;
2696             goto err_out1;
2697         }
2698
2699         if (tcon->posix_extensions) {
2700             context = smb2_find_context_vals(req,
2701                              SMB2_CREATE_TAG_POSIX);
2702             if (IS_ERR(context)) {
2703                 rc = PTR_ERR(context);
2704                 goto err_out1;
2705             } else if (context) {
2706                 struct create_posix *posix =
2707                     (struct create_posix *)context;
2708                 if (le16_to_cpu(context->DataOffset) +
2709                     le32_to_cpu(context->DataLength) <
2710                     sizeof(struct create_posix) - 4) {
2711                     rc = -EINVAL;
2712                     goto err_out1;
2713                 }
2714                 ksmbd_debug(SMB, "get posix context\n");
2715
2716                 posix_mode = le32_to_cpu(posix->Mode);
2717                 posix_ctxt = 1;
2718             }
2719         }
2720     }
2721
2722     if (ksmbd_override_fsids(work)) {
2723         rc = -ENOMEM;
2724         goto err_out1;
2725     }
2726
2727     rc = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, &path, 1);
2728     if (!rc) {
2729         if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
2730             /*
2731              * If file exists with under flags, return access
2732              * denied error.
2733              */
2734             if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
2735                 req->CreateDisposition == FILE_OPEN_IF_LE) {
2736                 rc = -EACCES;
2737                 path_put(&path);
2738                 goto err_out;
2739             }
2740
2741             if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2742                 ksmbd_debug(SMB,
2743                         "User does not have write permission\n");
2744                 rc = -EACCES;
2745                 path_put(&path);
2746                 goto err_out;
2747             }
2748         } else if (d_is_symlink(path.dentry)) {
2749             rc = -EACCES;
2750             path_put(&path);
2751             goto err_out;
2752         }
2753     }
2754
2755     if (rc) {
2756         if (rc != -ENOENT)
2757             goto err_out;
2758         ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
2759                 name, rc);
2760         rc = 0;
2761     } else {
2762         file_present = true;
2763         user_ns = mnt_user_ns(path.mnt);
2764         generic_fillattr(user_ns, d_inode(path.dentry), &stat);
2765     }
2766     if (stream_name) {
2767         if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2768             if (s_type == DATA_STREAM) {
2769                 rc = -EIO;
2770                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2771             }
2772         } else {
2773             if (S_ISDIR(stat.mode) && s_type == DATA_STREAM) {
2774                 rc = -EIO;
2775                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2776             }
2777         }
2778
2779         if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
2780             req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
2781             rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2782             rc = -EIO;
2783         }
2784
2785         if (rc < 0)
2786             goto err_out;
2787     }
2788
2789     if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
2790         S_ISDIR(stat.mode) && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2791         ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
2792                 name, req->CreateOptions);
2793         rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2794         rc = -EIO;
2795         goto err_out;
2796     }
2797
2798     if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2799         !(req->CreateDisposition == FILE_CREATE_LE) &&
2800         !S_ISDIR(stat.mode)) {
2801         rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2802         rc = -EIO;
2803         goto err_out;
2804     }
2805
2806     if (!stream_name && file_present &&
2807         req->CreateDisposition == FILE_CREATE_LE) {
2808         rc = -EEXIST;
2809         goto err_out;
2810     }
2811
2812     daccess = smb_map_generic_desired_access(req->DesiredAccess);
2813
2814     if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2815         rc = smb_check_perm_dacl(conn, &path, &daccess,
2816                      sess->user->uid);
2817         if (rc)
2818             goto err_out;
2819     }
2820
2821     if (daccess & FILE_MAXIMAL_ACCESS_LE) {
2822         if (!file_present) {
2823             daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
2824         } else {
2825             rc = ksmbd_vfs_query_maximal_access(user_ns,
2826                                 path.dentry,
2827                                 &daccess);
2828             if (rc)
2829                 goto err_out;
2830             already_permitted = true;
2831         }
2832         maximal_access = daccess;
2833     }
2834
2835     open_flags = smb2_create_open_flags(file_present, daccess,
2836                         req->CreateDisposition,
2837                         &may_flags);
2838
2839     if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2840         if (open_flags & O_CREAT) {
2841             ksmbd_debug(SMB,
2842                     "User does not have write permission\n");
2843             rc = -EACCES;
2844             goto err_out;
2845         }
2846     }
2847
2848     /*create file if not present */
2849     if (!file_present) {
2850         rc = smb2_creat(work, &path, name, open_flags, posix_mode,
2851                 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
2852         if (rc) {
2853             if (rc == -ENOENT) {
2854                 rc = -EIO;
2855                 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
2856             }
2857             goto err_out;
2858         }
2859
2860         created = true;
2861         user_ns = mnt_user_ns(path.mnt);
2862         if (ea_buf) {
2863             if (le32_to_cpu(ea_buf->ccontext.DataLength) <
2864                 sizeof(struct smb2_ea_info)) {
2865                 rc = -EINVAL;
2866                 goto err_out;
2867             }
2868
2869             rc = smb2_set_ea(&ea_buf->ea,
2870                      le32_to_cpu(ea_buf->ccontext.DataLength),
2871                      &path);
2872             if (rc == -EOPNOTSUPP)
2873                 rc = 0;
2874             else if (rc)
2875                 goto err_out;
2876         }
2877     } else if (!already_permitted) {
2878         /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
2879          * because execute(search) permission on a parent directory,
2880          * is already granted.
2881          */
2882         if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
2883             rc = inode_permission(user_ns,
2884                           d_inode(path.dentry),
2885                           may_flags);
2886             if (rc)
2887                 goto err_out;
2888
2889             if ((daccess & FILE_DELETE_LE) ||
2890                 (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2891                 rc = ksmbd_vfs_may_delete(user_ns,
2892                               path.dentry);
2893                 if (rc)
2894                     goto err_out;
2895             }
2896         }
2897     }
2898
2899     rc = ksmbd_query_inode_status(d_inode(path.dentry->d_parent));
2900     if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
2901         rc = -EBUSY;
2902         goto err_out;
2903     }
2904
2905     rc = 0;
2906     filp = dentry_open(&path, open_flags, current_cred());
2907     if (IS_ERR(filp)) {
2908         rc = PTR_ERR(filp);
2909         pr_err("dentry open for dir failed, rc %d\n", rc);
2910         goto err_out;
2911     }
2912
2913     if (file_present) {
2914         if (!(open_flags & O_TRUNC))
2915             file_info = FILE_OPENED;
2916         else
2917             file_info = FILE_OVERWRITTEN;
2918
2919         if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
2920             FILE_SUPERSEDE_LE)
2921             file_info = FILE_SUPERSEDED;
2922     } else if (open_flags & O_CREAT) {
2923         file_info = FILE_CREATED;
2924     }
2925
2926     ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
2927
2928     /* Obtain Volatile-ID */
2929     fp = ksmbd_open_fd(work, filp);
2930     if (IS_ERR(fp)) {
2931         fput(filp);
2932         rc = PTR_ERR(fp);
2933         fp = NULL;
2934         goto err_out;
2935     }
2936
2937     /* Get Persistent-ID */
2938     ksmbd_open_durable_fd(fp);
2939     if (!has_file_id(fp->persistent_id)) {
2940         rc = -ENOMEM;
2941         goto err_out;
2942     }
2943
2944     fp->cdoption = req->CreateDisposition;
2945     fp->daccess = daccess;
2946     fp->saccess = req->ShareAccess;
2947     fp->coption = req->CreateOptions;
2948
2949     /* Set default windows and posix acls if creating new file */
2950     if (created) {
2951         int posix_acl_rc;
2952         struct inode *inode = d_inode(path.dentry);
2953
2954         posix_acl_rc = ksmbd_vfs_inherit_posix_acl(user_ns,
2955                                inode,
2956                                d_inode(path.dentry->d_parent));
2957         if (posix_acl_rc)
2958             ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
2959
2960         if (test_share_config_flag(work->tcon->share_conf,
2961                        KSMBD_SHARE_FLAG_ACL_XATTR)) {
2962             rc = smb_inherit_dacl(conn, &path, sess->user->uid,
2963                           sess->user->gid);
2964         }
2965
2966         if (rc) {
2967             rc = smb2_create_sd_buffer(work, req, &path);
2968             if (rc) {
2969                 if (posix_acl_rc)
2970                     ksmbd_vfs_set_init_posix_acl(user_ns,
2971                                      inode);
2972
2973                 if (test_share_config_flag(work->tcon->share_conf,
2974                                KSMBD_SHARE_FLAG_ACL_XATTR)) {
2975                     struct smb_fattr fattr;
2976                     struct smb_ntsd *pntsd;
2977                     int pntsd_size, ace_num = 0;
2978
2979                     ksmbd_acls_fattr(&fattr, user_ns, inode);
2980                     if (fattr.cf_acls)
2981                         ace_num = fattr.cf_acls->a_count;
2982                     if (fattr.cf_dacls)
2983                         ace_num += fattr.cf_dacls->a_count;
2984
2985                     pntsd = kmalloc(sizeof(struct smb_ntsd) +
2986                             sizeof(struct smb_sid) * 3 +
2987                             sizeof(struct smb_acl) +
2988                             sizeof(struct smb_ace) * ace_num * 2,
2989                             GFP_KERNEL);
2990                     if (!pntsd)
2991                         goto err_out;
2992
2993                     rc = build_sec_desc(user_ns,
2994                                 pntsd, NULL, 0,
2995                                 OWNER_SECINFO |
2996                                 GROUP_SECINFO |
2997                                 DACL_SECINFO,
2998                                 &pntsd_size, &fattr);
2999                     posix_acl_release(fattr.cf_acls);
3000                     posix_acl_release(fattr.cf_dacls);
3001                     if (rc) {
3002                         kfree(pntsd);
3003                         goto err_out;
3004                     }
3005
3006                     rc = ksmbd_vfs_set_sd_xattr(conn,
3007                                     user_ns,
3008                                     path.dentry,
3009                                     pntsd,
3010                                     pntsd_size);
3011                     kfree(pntsd);
3012                     if (rc)
3013                         pr_err("failed to store ntacl in xattr : %d\n",
3014                                rc);
3015                 }
3016             }
3017         }
3018         rc = 0;
3019     }
3020
3021     if (stream_name) {
3022         rc = smb2_set_stream_name_xattr(&path,
3023                         fp,
3024                         stream_name,
3025                         s_type);
3026         if (rc)
3027             goto err_out;
3028         file_info = FILE_CREATED;
3029     }
3030
3031     fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3032             FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3033     if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3034         !fp->attrib_only && !stream_name) {
3035         smb_break_all_oplock(work, fp);
3036         need_truncate = 1;
3037     }
3038
3039     /* fp should be searchable through ksmbd_inode.m_fp_list
3040      * after daccess, saccess, attrib_only, and stream are
3041      * initialized.
3042      */
3043     write_lock(&fp->f_ci->m_lock);
3044     list_add(&fp->node, &fp->f_ci->m_fp_list);
3045     write_unlock(&fp->f_ci->m_lock);
3046
3047     /* Check delete pending among previous fp before oplock break */
3048     if (ksmbd_inode_pending_delete(fp)) {
3049         rc = -EBUSY;
3050         goto err_out;
3051     }
3052
3053     share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3054     if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3055         (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3056          !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3057         if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3058             rc = share_ret;
3059             goto err_out;
3060         }
3061     } else {
3062         if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
3063             req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3064             ksmbd_debug(SMB,
3065                     "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3066                     name, req_op_level, lc->req_state);
3067             rc = find_same_lease_key(sess, fp->f_ci, lc);
3068             if (rc)
3069                 goto err_out;
3070         } else if (open_flags == O_RDONLY &&
3071                (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3072                 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3073             req_op_level = SMB2_OPLOCK_LEVEL_II;
3074
3075         rc = smb_grant_oplock(work, req_op_level,
3076                       fp->persistent_id, fp,
3077                       le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3078                       lc, share_ret);
3079         if (rc < 0)
3080             goto err_out;
3081     }
3082
3083     if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3084         ksmbd_fd_set_delete_on_close(fp, file_info);
3085
3086     if (need_truncate) {
3087         rc = smb2_create_truncate(&path);
3088         if (rc)
3089             goto err_out;
3090     }
3091
3092     if (req->CreateContextsOffset) {
3093         struct create_alloc_size_req *az_req;
3094
3095         az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3096                     SMB2_CREATE_ALLOCATION_SIZE);
3097         if (IS_ERR(az_req)) {
3098             rc = PTR_ERR(az_req);
3099             goto err_out;
3100         } else if (az_req) {
3101             loff_t alloc_size;
3102             int err;
3103
3104             if (le16_to_cpu(az_req->ccontext.DataOffset) +
3105                 le32_to_cpu(az_req->ccontext.DataLength) <
3106                 sizeof(struct create_alloc_size_req)) {
3107                 rc = -EINVAL;
3108                 goto err_out;
3109             }
3110             alloc_size = le64_to_cpu(az_req->AllocationSize);
3111             ksmbd_debug(SMB,
3112                     "request smb2 create allocate size : %llu\n",
3113                     alloc_size);
3114             smb_break_all_levII_oplock(work, fp, 1);
3115             err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3116                         alloc_size);
3117             if (err < 0)
3118                 ksmbd_debug(SMB,
3119                         "vfs_fallocate is failed : %d\n",
3120                         err);
3121         }
3122
3123         context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID);
3124         if (IS_ERR(context)) {
3125             rc = PTR_ERR(context);
3126             goto err_out;
3127         } else if (context) {
3128             ksmbd_debug(SMB, "get query on disk id context\n");
3129             query_disk_id = 1;
3130         }
3131     }
3132
3133     rc = ksmbd_vfs_getattr(&path, &stat);
3134     if (rc)
3135         goto err_out;
3136
3137     if (stat.result_mask & STATX_BTIME)
3138         fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3139     else
3140         fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3141     if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3142         fp->f_ci->m_fattr =
3143             cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3144
3145     if (!created)
3146         smb2_update_xattrs(tcon, &path, fp);
3147     else
3148         smb2_new_xattrs(tcon, &path, fp);
3149
3150     memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3151
3152     rsp->StructureSize = cpu_to_le16(89);
3153     rcu_read_lock();
3154     opinfo = rcu_dereference(fp->f_opinfo);
3155     rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3156     rcu_read_unlock();
3157     rsp->Flags = 0;
3158     rsp->CreateAction = cpu_to_le32(file_info);
3159     rsp->CreationTime = cpu_to_le64(fp->create_time);
3160     time = ksmbd_UnixTimeToNT(stat.atime);
3161     rsp->LastAccessTime = cpu_to_le64(time);
3162     time = ksmbd_UnixTimeToNT(stat.mtime);
3163     rsp->LastWriteTime = cpu_to_le64(time);
3164     time = ksmbd_UnixTimeToNT(stat.ctime);
3165     rsp->ChangeTime = cpu_to_le64(time);
3166     rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3167         cpu_to_le64(stat.blocks << 9);
3168     rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3169     rsp->FileAttributes = fp->f_ci->m_fattr;
3170
3171     rsp->Reserved2 = 0;
3172
3173     rsp->PersistentFileId = fp->persistent_id;
3174     rsp->VolatileFileId = fp->volatile_id;
3175
3176     rsp->CreateContextsOffset = 0;
3177     rsp->CreateContextsLength = 0;
3178     inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/
3179
3180     /* If lease is request send lease context response */
3181     if (opinfo && opinfo->is_lease) {
3182         struct create_context *lease_ccontext;
3183
3184         ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3185                 name, opinfo->o_lease->state);
3186         rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3187
3188         lease_ccontext = (struct create_context *)rsp->Buffer;
3189         contxt_cnt++;
3190         create_lease_buf(rsp->Buffer, opinfo->o_lease);
3191         le32_add_cpu(&rsp->CreateContextsLength,
3192                  conn->vals->create_lease_size);
3193         inc_rfc1001_len(work->response_buf,
3194                 conn->vals->create_lease_size);
3195         next_ptr = &lease_ccontext->Next;
3196         next_off = conn->vals->create_lease_size;
3197     }
3198
3199     if (maximal_access_ctxt) {
3200         struct create_context *mxac_ccontext;
3201
3202         if (maximal_access == 0)
3203             ksmbd_vfs_query_maximal_access(user_ns,
3204                                path.dentry,
3205                                &maximal_access);
3206         mxac_ccontext = (struct create_context *)(rsp->Buffer +
3207                 le32_to_cpu(rsp->CreateContextsLength));
3208         contxt_cnt++;
3209         create_mxac_rsp_buf(rsp->Buffer +
3210                 le32_to_cpu(rsp->CreateContextsLength),
3211                 le32_to_cpu(maximal_access));
3212         le32_add_cpu(&rsp->CreateContextsLength,
3213                  conn->vals->create_mxac_size);
3214         inc_rfc1001_len(work->response_buf,
3215                 conn->vals->create_mxac_size);
3216         if (next_ptr)
3217             *next_ptr = cpu_to_le32(next_off);
3218         next_ptr = &mxac_ccontext->Next;
3219         next_off = conn->vals->create_mxac_size;
3220     }
3221
3222     if (query_disk_id) {
3223         struct create_context *disk_id_ccontext;
3224
3225         disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3226                 le32_to_cpu(rsp->CreateContextsLength));
3227         contxt_cnt++;
3228         create_disk_id_rsp_buf(rsp->Buffer +
3229                 le32_to_cpu(rsp->CreateContextsLength),
3230                 stat.ino, tcon->id);
3231         le32_add_cpu(&rsp->CreateContextsLength,
3232                  conn->vals->create_disk_id_size);
3233         inc_rfc1001_len(work->response_buf,
3234                 conn->vals->create_disk_id_size);
3235         if (next_ptr)
3236             *next_ptr = cpu_to_le32(next_off);
3237         next_ptr = &disk_id_ccontext->Next;
3238         next_off = conn->vals->create_disk_id_size;
3239     }
3240
3241     if (posix_ctxt) {
3242         contxt_cnt++;
3243         create_posix_rsp_buf(rsp->Buffer +
3244                 le32_to_cpu(rsp->CreateContextsLength),
3245                 fp);
3246         le32_add_cpu(&rsp->CreateContextsLength,
3247                  conn->vals->create_posix_size);
3248         inc_rfc1001_len(work->response_buf,
3249                 conn->vals->create_posix_size);
3250         if (next_ptr)
3251             *next_ptr = cpu_to_le32(next_off);
3252     }
3253
3254     if (contxt_cnt > 0) {
3255         rsp->CreateContextsOffset =
3256             cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3257     }
3258
3259 err_out:
3260     if (file_present || created)
3261         path_put(&path);
3262     ksmbd_revert_fsids(work);
3263 err_out1:
3264     if (rc) {
3265         if (rc == -EINVAL)
3266             rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3267         else if (rc == -EOPNOTSUPP)
3268             rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3269         else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3270             rsp->hdr.Status = STATUS_ACCESS_DENIED;
3271         else if (rc == -ENOENT)
3272             rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3273         else if (rc == -EPERM)
3274             rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3275         else if (rc == -EBUSY)
3276             rsp->hdr.Status = STATUS_DELETE_PENDING;
3277         else if (rc == -EBADF)
3278             rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3279         else if (rc == -ENOEXEC)
3280             rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3281         else if (rc == -ENXIO)
3282             rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3283         else if (rc == -EEXIST)
3284             rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3285         else if (rc == -EMFILE)
3286             rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3287         if (!rsp->hdr.Status)
3288             rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3289
3290         if (fp)
3291             ksmbd_fd_put(work, fp);
3292         smb2_set_err_rsp(work);
3293         ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3294     }
3295
3296     kfree(name);
3297     kfree(lc);
3298
3299     return 0;
3300 }
3301
3302 static int readdir_info_level_struct_sz(int info_level)
3303 {
3304     switch (info_level) {
3305     case FILE_FULL_DIRECTORY_INFORMATION:
3306         return sizeof(struct file_full_directory_info);
3307     case FILE_BOTH_DIRECTORY_INFORMATION:
3308         return sizeof(struct file_both_directory_info);
3309     case FILE_DIRECTORY_INFORMATION:
3310         return sizeof(struct file_directory_info);
3311     case FILE_NAMES_INFORMATION:
3312         return sizeof(struct file_names_info);
3313     case FILEID_FULL_DIRECTORY_INFORMATION:
3314         return sizeof(struct file_id_full_dir_info);
3315     case FILEID_BOTH_DIRECTORY_INFORMATION:
3316         return sizeof(struct file_id_both_directory_info);
3317     case SMB_FIND_FILE_POSIX_INFO:
3318         return sizeof(struct smb2_posix_info);
3319     default:
3320         return -EOPNOTSUPP;
3321     }
3322 }
3323
3324 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3325 {
3326     switch (info_level) {
3327     case FILE_FULL_DIRECTORY_INFORMATION:
3328     {
3329         struct file_full_directory_info *ffdinfo;
3330
3331         ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3332         d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3333         d_info->name = ffdinfo->FileName;
3334         d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3335         return 0;
3336     }
3337     case FILE_BOTH_DIRECTORY_INFORMATION:
3338     {
3339         struct file_both_directory_info *fbdinfo;
3340
3341         fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3342         d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3343         d_info->name = fbdinfo->FileName;
3344         d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3345         return 0;
3346     }
3347     case FILE_DIRECTORY_INFORMATION:
3348     {
3349         struct file_directory_info *fdinfo;
3350
3351         fdinfo = (struct file_directory_info *)d_info->rptr;
3352         d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3353         d_info->name = fdinfo->FileName;
3354         d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3355         return 0;
3356     }
3357     case FILE_NAMES_INFORMATION:
3358     {
3359         struct file_names_info *fninfo;
3360
3361         fninfo = (struct file_names_info *)d_info->rptr;
3362         d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3363         d_info->name = fninfo->FileName;
3364         d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3365         return 0;
3366     }
3367     case FILEID_FULL_DIRECTORY_INFORMATION:
3368     {
3369         struct file_id_full_dir_info *dinfo;
3370
3371         dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3372         d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3373         d_info->name = dinfo->FileName;
3374         d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3375         return 0;
3376     }
3377     case FILEID_BOTH_DIRECTORY_INFORMATION:
3378     {
3379         struct file_id_both_directory_info *fibdinfo;
3380
3381         fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3382         d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3383         d_info->name = fibdinfo->FileName;
3384         d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3385         return 0;
3386     }
3387     case SMB_FIND_FILE_POSIX_INFO:
3388     {
3389         struct smb2_posix_info *posix_info;
3390
3391         posix_info = (struct smb2_posix_info *)d_info->rptr;
3392         d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3393         d_info->name = posix_info->name;
3394         d_info->name_len = le32_to_cpu(posix_info->name_len);
3395         return 0;
3396     }
3397     default:
3398         return -EINVAL;
3399     }
3400 }
3401
3402 /**
3403  * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3404  * buffer
3405  * @conn:   connection instance
3406  * @info_level: smb information level
3407  * @d_info: structure included variables for query dir
3408  * @ksmbd_kstat:    ksmbd wrapper of dirent stat information
3409  *
3410  * if directory has many entries, find first can't read it fully.
3411  * find next might be called multiple times to read remaining dir entries
3412  *
3413  * Return:  0 on success, otherwise error
3414  */
3415 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3416                        struct ksmbd_dir_info *d_info,
3417                        struct ksmbd_kstat *ksmbd_kstat)
3418 {
3419     int next_entry_offset = 0;
3420     char *conv_name;
3421     int conv_len;
3422     void *kstat;
3423     int struct_sz, rc = 0;
3424
3425     conv_name = ksmbd_convert_dir_info_name(d_info,
3426                         conn->local_nls,
3427                         &conv_len);
3428     if (!conv_name)
3429         return -ENOMEM;
3430
3431     /* Somehow the name has only terminating NULL bytes */
3432     if (conv_len < 0) {
3433         rc = -EINVAL;
3434         goto free_conv_name;
3435     }
3436
3437     struct_sz = readdir_info_level_struct_sz(info_level) - 1 + conv_len;
3438     next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3439     d_info->last_entry_off_align = next_entry_offset - struct_sz;
3440
3441     if (next_entry_offset > d_info->out_buf_len) {
3442         d_info->out_buf_len = 0;
3443         rc = -ENOSPC;
3444         goto free_conv_name;
3445     }
3446
3447     kstat = d_info->wptr;
3448     if (info_level != FILE_NAMES_INFORMATION)
3449         kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3450
3451     switch (info_level) {
3452     case FILE_FULL_DIRECTORY_INFORMATION:
3453     {
3454         struct file_full_directory_info *ffdinfo;
3455
3456         ffdinfo = (struct file_full_directory_info *)kstat;
3457         ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3458         ffdinfo->EaSize =
3459             smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3460         if (ffdinfo->EaSize)
3461             ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3462         if (d_info->hide_dot_file && d_info->name[0] == '.')
3463             ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3464         memcpy(ffdinfo->FileName, conv_name, conv_len);
3465         ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3466         break;
3467     }
3468     case FILE_BOTH_DIRECTORY_INFORMATION:
3469     {
3470         struct file_both_directory_info *fbdinfo;
3471
3472         fbdinfo = (struct file_both_directory_info *)kstat;
3473         fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3474         fbdinfo->EaSize =
3475             smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3476         if (fbdinfo->EaSize)
3477             fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3478         fbdinfo->ShortNameLength = 0;
3479         fbdinfo->Reserved = 0;
3480         if (d_info->hide_dot_file && d_info->name[0] == '.')
3481             fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3482         memcpy(fbdinfo->FileName, conv_name, conv_len);
3483         fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3484         break;
3485     }
3486     case FILE_DIRECTORY_INFORMATION:
3487     {
3488         struct file_directory_info *fdinfo;
3489
3490         fdinfo = (struct file_directory_info *)kstat;
3491         fdinfo->FileNameLength = cpu_to_le32(conv_len);
3492         if (d_info->hide_dot_file && d_info->name[0] == '.')
3493             fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3494         memcpy(fdinfo->FileName, conv_name, conv_len);
3495         fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3496         break;
3497     }
3498     case FILE_NAMES_INFORMATION:
3499     {
3500         struct file_names_info *fninfo;
3501
3502         fninfo = (struct file_names_info *)kstat;
3503         fninfo->FileNameLength = cpu_to_le32(conv_len);
3504         memcpy(fninfo->FileName, conv_name, conv_len);
3505         fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3506         break;
3507     }
3508     case FILEID_FULL_DIRECTORY_INFORMATION:
3509     {
3510         struct file_id_full_dir_info *dinfo;
3511
3512         dinfo = (struct file_id_full_dir_info *)kstat;
3513         dinfo->FileNameLength = cpu_to_le32(conv_len);
3514         dinfo->EaSize =
3515             smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3516         if (dinfo->EaSize)
3517             dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3518         dinfo->Reserved = 0;
3519         dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3520         if (d_info->hide_dot_file && d_info->name[0] == '.')
3521             dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3522         memcpy(dinfo->FileName, conv_name, conv_len);
3523         dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3524         break;
3525     }
3526     case FILEID_BOTH_DIRECTORY_INFORMATION:
3527     {
3528         struct file_id_both_directory_info *fibdinfo;
3529
3530         fibdinfo = (struct file_id_both_directory_info *)kstat;
3531         fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3532         fibdinfo->EaSize =
3533             smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3534         if (fibdinfo->EaSize)
3535             fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3536         fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3537         fibdinfo->ShortNameLength = 0;
3538         fibdinfo->Reserved = 0;
3539         fibdinfo->Reserved2 = cpu_to_le16(0);
3540         if (d_info->hide_dot_file && d_info->name[0] == '.')
3541             fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3542         memcpy(fibdinfo->FileName, conv_name, conv_len);
3543         fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3544         break;
3545     }
3546     case SMB_FIND_FILE_POSIX_INFO:
3547     {
3548         struct smb2_posix_info *posix_info;
3549         u64 time;
3550
3551         posix_info = (struct smb2_posix_info *)kstat;
3552         posix_info->Ignored = 0;
3553         posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3554         time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3555         posix_info->ChangeTime = cpu_to_le64(time);
3556         time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3557         posix_info->LastAccessTime = cpu_to_le64(time);
3558         time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3559         posix_info->LastWriteTime = cpu_to_le64(time);
3560         posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3561         posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3562         posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3563         posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3564         posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode);
3565         posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3566         posix_info->DosAttributes =
3567             S_ISDIR(ksmbd_kstat->kstat->mode) ?
3568                 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3569         if (d_info->hide_dot_file && d_info->name[0] == '.')
3570             posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3571         id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3572               SIDNFS_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3573         id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3574               SIDNFS_GROUP, (struct smb_sid *)&posix_info->SidBuffer[20]);
3575         memcpy(posix_info->name, conv_name, conv_len);
3576         posix_info->name_len = cpu_to_le32(conv_len);
3577         posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
3578         break;
3579     }
3580
3581     } /* switch (info_level) */
3582
3583     d_info->last_entry_offset = d_info->data_count;
3584     d_info->data_count += next_entry_offset;
3585     d_info->out_buf_len -= next_entry_offset;
3586     d_info->wptr += next_entry_offset;
3587
3588     ksmbd_debug(SMB,
3589             "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
3590             info_level, d_info->out_buf_len,
3591             next_entry_offset, d_info->data_count);
3592
3593 free_conv_name:
3594     kfree(conv_name);
3595     return rc;
3596 }
3597
3598 struct smb2_query_dir_private {
3599     struct ksmbd_work   *work;
3600     char            *search_pattern;
3601     struct ksmbd_file   *dir_fp;
3602
3603     struct ksmbd_dir_info   *d_info;
3604     int         info_level;
3605 };
3606
3607 static void lock_dir(struct ksmbd_file *dir_fp)
3608 {
3609     struct dentry *dir = dir_fp->filp->f_path.dentry;
3610
3611     inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
3612 }
3613
3614 static void unlock_dir(struct ksmbd_file *dir_fp)
3615 {
3616     struct dentry *dir = dir_fp->filp->f_path.dentry;
3617
3618     inode_unlock(d_inode(dir));
3619 }
3620
3621 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
3622 {
3623     struct user_namespace   *user_ns = file_mnt_user_ns(priv->dir_fp->filp);
3624     struct kstat        kstat;
3625     struct ksmbd_kstat  ksmbd_kstat;
3626     int         rc;
3627     int         i;
3628
3629     for (i = 0; i < priv->d_info->num_entry; i++) {
3630         struct dentry *dent;
3631
3632         if (dentry_name(priv->d_info, priv->info_level))
3633             return -EINVAL;
3634
3635         lock_dir(priv->dir_fp);
3636         dent = lookup_one(user_ns, priv->d_info->name,
3637                   priv->dir_fp->filp->f_path.dentry,
3638                   priv->d_info->name_len);
3639         unlock_dir(priv->dir_fp);
3640
3641         if (IS_ERR(dent)) {
3642             ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
3643                     priv->d_info->name,
3644                     PTR_ERR(dent));
3645             continue;
3646         }
3647         if (unlikely(d_is_negative(dent))) {
3648             dput(dent);
3649             ksmbd_debug(SMB, "Negative dentry `%s'\n",
3650                     priv->d_info->name);
3651             continue;
3652         }
3653
3654         ksmbd_kstat.kstat = &kstat;
3655         if (priv->info_level != FILE_NAMES_INFORMATION)
3656             ksmbd_vfs_fill_dentry_attrs(priv->work,
3657                             user_ns,
3658                             dent,
3659                             &ksmbd_kstat);
3660
3661         rc = smb2_populate_readdir_entry(priv->work->conn,
3662                          priv->info_level,
3663                          priv->d_info,
3664                          &ksmbd_kstat);
3665         dput(dent);
3666         if (rc)
3667             return rc;
3668     }
3669     return 0;
3670 }
3671
3672 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
3673                    int info_level)
3674 {
3675     int struct_sz;
3676     int conv_len;
3677     int next_entry_offset;
3678
3679     struct_sz = readdir_info_level_struct_sz(info_level);
3680     if (struct_sz == -EOPNOTSUPP)
3681         return -EOPNOTSUPP;
3682
3683     conv_len = (d_info->name_len + 1) * 2;
3684     next_entry_offset = ALIGN(struct_sz - 1 + conv_len,
3685                   KSMBD_DIR_INFO_ALIGNMENT);
3686
3687     if (next_entry_offset > d_info->out_buf_len) {
3688         d_info->out_buf_len = 0;
3689         return -ENOSPC;
3690     }
3691
3692     switch (info_level) {
3693     case FILE_FULL_DIRECTORY_INFORMATION:
3694     {
3695         struct file_full_directory_info *ffdinfo;
3696
3697         ffdinfo = (struct file_full_directory_info *)d_info->wptr;
3698         memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
3699         ffdinfo->FileName[d_info->name_len] = 0x00;
3700         ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3701         ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3702         break;
3703     }
3704     case FILE_BOTH_DIRECTORY_INFORMATION:
3705     {
3706         struct file_both_directory_info *fbdinfo;
3707
3708         fbdinfo = (struct file_both_directory_info *)d_info->wptr;
3709         memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
3710         fbdinfo->FileName[d_info->name_len] = 0x00;
3711         fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3712         fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3713         break;
3714     }
3715     case FILE_DIRECTORY_INFORMATION:
3716     {
3717         struct file_directory_info *fdinfo;
3718
3719         fdinfo = (struct file_directory_info *)d_info->wptr;
3720         memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
3721         fdinfo->FileName[d_info->name_len] = 0x00;
3722         fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3723         fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3724         break;
3725     }
3726     case FILE_NAMES_INFORMATION:
3727     {
3728         struct file_names_info *fninfo;
3729
3730         fninfo = (struct file_names_info *)d_info->wptr;
3731         memcpy(fninfo->FileName, d_info->name, d_info->name_len);
3732         fninfo->FileName[d_info->name_len] = 0x00;
3733         fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
3734         fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3735         break;
3736     }
3737     case FILEID_FULL_DIRECTORY_INFORMATION:
3738     {
3739         struct file_id_full_dir_info *dinfo;
3740
3741         dinfo = (struct file_id_full_dir_info *)d_info->wptr;
3742         memcpy(dinfo->FileName, d_info->name, d_info->name_len);
3743         dinfo->FileName[d_info->name_len] = 0x00;
3744         dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3745         dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3746         break;
3747     }
3748     case FILEID_BOTH_DIRECTORY_INFORMATION:
3749     {
3750         struct file_id_both_directory_info *fibdinfo;
3751
3752         fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
3753         memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
3754         fibdinfo->FileName[d_info->name_len] = 0x00;
3755         fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3756         fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3757         break;
3758     }
3759     case SMB_FIND_FILE_POSIX_INFO:
3760     {
3761         struct smb2_posix_info *posix_info;
3762
3763         posix_info = (struct smb2_posix_info *)d_info->wptr;
3764         memcpy(posix_info->name, d_info->name, d_info->name_len);
3765         posix_info->name[d_info->name_len] = 0x00;
3766         posix_info->name_len = cpu_to_le32(d_info->name_len);
3767         posix_info->NextEntryOffset =
3768             cpu_to_le32(next_entry_offset);
3769         break;
3770     }
3771     } /* switch (info_level) */
3772
3773     d_info->num_entry++;
3774     d_info->out_buf_len -= next_entry_offset;
3775     d_info->wptr += next_entry_offset;
3776     return 0;
3777 }
3778
3779 static int __query_dir(struct dir_context *ctx, const char *name, int namlen,
3780                loff_t offset, u64 ino, unsigned int d_type)
3781 {
3782     struct ksmbd_readdir_data   *buf;
3783     struct smb2_query_dir_private   *priv;
3784     struct ksmbd_dir_info       *d_info;
3785     int             rc;
3786
3787     buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
3788     priv    = buf->private;
3789     d_info  = priv->d_info;
3790
3791     /* dot and dotdot entries are already reserved */
3792     if (!strcmp(".", name) || !strcmp("..", name))
3793         return 0;
3794     if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
3795         return 0;
3796     if (!match_pattern(name, namlen, priv->search_pattern))
3797         return 0;
3798
3799     d_info->name        = name;
3800     d_info->name_len    = namlen;
3801     rc = reserve_populate_dentry(d_info, priv->info_level);
3802     if (rc)
3803         return rc;
3804     if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) {
3805         d_info->out_buf_len = 0;
3806         return 0;
3807     }
3808     return 0;
3809 }
3810
3811 static void restart_ctx(struct dir_context *ctx)
3812 {
3813     ctx->pos = 0;
3814 }
3815
3816 static int verify_info_level(int info_level)
3817 {
3818     switch (info_level) {
3819     case FILE_FULL_DIRECTORY_INFORMATION:
3820     case FILE_BOTH_DIRECTORY_INFORMATION:
3821     case FILE_DIRECTORY_INFORMATION:
3822     case FILE_NAMES_INFORMATION:
3823     case FILEID_FULL_DIRECTORY_INFORMATION:
3824     case FILEID_BOTH_DIRECTORY_INFORMATION:
3825     case SMB_FIND_FILE_POSIX_INFO:
3826         break;
3827     default:
3828         return -EOPNOTSUPP;
3829     }
3830
3831     return 0;
3832 }
3833
3834 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
3835 {
3836     int free_len;
3837
3838     free_len = (int)(work->response_sz -
3839         (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
3840     return free_len;
3841 }
3842
3843 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
3844                      unsigned short hdr2_len,
3845                      unsigned int out_buf_len)
3846 {
3847     int free_len;
3848
3849     if (out_buf_len > work->conn->vals->max_trans_size)
3850         return -EINVAL;
3851
3852     free_len = smb2_resp_buf_len(work, hdr2_len);
3853     if (free_len < 0)
3854         return -EINVAL;
3855
3856     return min_t(int, out_buf_len, free_len);
3857 }
3858
3859 int smb2_query_dir(struct ksmbd_work *work)
3860 {
3861     struct ksmbd_conn *conn = work->conn;
3862     struct smb2_query_directory_req *req;
3863     struct smb2_query_directory_rsp *rsp;
3864     struct ksmbd_share_config *share = work->tcon->share_conf;
3865     struct ksmbd_file *dir_fp = NULL;
3866     struct ksmbd_dir_info d_info;
3867     int rc = 0;
3868     char *srch_ptr = NULL;
3869     unsigned char srch_flag;
3870     int buffer_sz;
3871     struct smb2_query_dir_private query_dir_private = {NULL, };
3872
3873     WORK_BUFFERS(work, req, rsp);
3874
3875     if (ksmbd_override_fsids(work)) {
3876         rsp->hdr.Status = STATUS_NO_MEMORY;
3877         smb2_set_err_rsp(work);
3878         return -ENOMEM;
3879     }
3880
3881     rc = verify_info_level(req->FileInformationClass);
3882     if (rc) {
3883         rc = -EFAULT;
3884         goto err_out2;
3885     }
3886
3887     dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
3888     if (!dir_fp) {
3889         rc = -EBADF;
3890         goto err_out2;
3891     }
3892
3893     if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
3894         inode_permission(file_mnt_user_ns(dir_fp->filp),
3895                  file_inode(dir_fp->filp),
3896                  MAY_READ | MAY_EXEC)) {
3897         pr_err("no right to enumerate directory (%pd)\n",
3898                dir_fp->filp->f_path.dentry);
3899         rc = -EACCES;
3900         goto err_out2;
3901     }
3902
3903     if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
3904         pr_err("can't do query dir for a file\n");
3905         rc = -EINVAL;
3906         goto err_out2;
3907     }
3908
3909     srch_flag = req->Flags;
3910     srch_ptr = smb_strndup_from_utf16(req->Buffer,
3911                       le16_to_cpu(req->FileNameLength), 1,
3912                       conn->local_nls);
3913     if (IS_ERR(srch_ptr)) {
3914         ksmbd_debug(SMB, "Search Pattern not found\n");
3915         rc = -EINVAL;
3916         goto err_out2;
3917     } else {
3918         ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
3919     }
3920
3921     if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
3922         ksmbd_debug(SMB, "Restart directory scan\n");
3923         generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
3924         restart_ctx(&dir_fp->readdir_data.ctx);
3925     }
3926
3927     memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
3928     d_info.wptr = (char *)rsp->Buffer;
3929     d_info.rptr = (char *)rsp->Buffer;
3930     d_info.out_buf_len =
3931         smb2_calc_max_out_buf_len(work, 8,
3932                       le32_to_cpu(req->OutputBufferLength));
3933     if (d_info.out_buf_len < 0) {
3934         rc = -EINVAL;
3935         goto err_out;
3936     }
3937     d_info.flags = srch_flag;
3938
3939     /*
3940      * reserve dot and dotdot entries in head of buffer
3941      * in first response
3942      */
3943     rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
3944                            dir_fp, &d_info, srch_ptr,
3945                            smb2_populate_readdir_entry);
3946     if (rc == -ENOSPC)
3947         rc = 0;
3948     else if (rc)
3949         goto err_out;
3950
3951     if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
3952         d_info.hide_dot_file = true;
3953
3954     buffer_sz               = d_info.out_buf_len;
3955     d_info.rptr             = d_info.wptr;
3956     query_dir_private.work          = work;
3957     query_dir_private.search_pattern    = srch_ptr;
3958     query_dir_private.dir_fp        = dir_fp;
3959     query_dir_private.d_info        = &d_info;
3960     query_dir_private.info_level        = req->FileInformationClass;
3961     dir_fp->readdir_data.private        = &query_dir_private;
3962     set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
3963
3964     rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
3965     /*
3966      * req->OutputBufferLength is too small to contain even one entry.
3967      * In this case, it immediately returns OutputBufferLength 0 to client.
3968      */
3969     if (!d_info.out_buf_len && !d_info.num_entry)
3970         goto no_buf_len;
3971     if (rc == 0)
3972         restart_ctx(&dir_fp->readdir_data.ctx);
3973     if (rc == -ENOSPC)
3974         rc = 0;
3975     if (rc)
3976         goto err_out;
3977
3978     d_info.wptr = d_info.rptr;
3979     d_info.out_buf_len = buffer_sz;
3980     rc = process_query_dir_entries(&query_dir_private);
3981     if (rc)
3982         goto err_out;
3983
3984     if (!d_info.data_count && d_info.out_buf_len >= 0) {
3985         if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
3986             rsp->hdr.Status = STATUS_NO_SUCH_FILE;
3987         } else {
3988             dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
3989             rsp->hdr.Status = STATUS_NO_MORE_FILES;
3990         }
3991         rsp->StructureSize = cpu_to_le16(9);
3992         rsp->OutputBufferOffset = cpu_to_le16(0);
3993         rsp->OutputBufferLength = cpu_to_le32(0);
3994         rsp->Buffer[0] = 0;
3995         inc_rfc1001_len(work->response_buf, 9);
3996     } else {
3997 no_buf_len:
3998         ((struct file_directory_info *)
3999         ((char *)rsp->Buffer + d_info.last_entry_offset))
4000         ->NextEntryOffset = 0;
4001         if (d_info.data_count >= d_info.last_entry_off_align)
4002             d_info.data_count -= d_info.last_entry_off_align;
4003
4004         rsp->StructureSize = cpu_to_le16(9);
4005         rsp->OutputBufferOffset = cpu_to_le16(72);
4006         rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4007         inc_rfc1001_len(work->response_buf, 8 + d_info.data_count);
4008     }
4009
4010     kfree(srch_ptr);
4011     ksmbd_fd_put(work, dir_fp);
4012     ksmbd_revert_fsids(work);
4013     return 0;
4014
4015 err_out:
4016     pr_err("error while processing smb2 query dir rc = %d\n", rc);
4017     kfree(srch_ptr);
4018
4019 err_out2:
4020     if (rc == -EINVAL)
4021         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4022     else if (rc == -EACCES)
4023         rsp->hdr.Status = STATUS_ACCESS_DENIED;
4024     else if (rc == -ENOENT)
4025         rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4026     else if (rc == -EBADF)
4027         rsp->hdr.Status = STATUS_FILE_CLOSED;
4028     else if (rc == -ENOMEM)
4029         rsp->hdr.Status = STATUS_NO_MEMORY;
4030     else if (rc == -EFAULT)
4031         rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4032     if (!rsp->hdr.Status)
4033         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4034
4035     smb2_set_err_rsp(work);
4036     ksmbd_fd_put(work, dir_fp);
4037     ksmbd_revert_fsids(work);
4038     return 0;
4039 }
4040
4041 /**
4042  * buffer_check_err() - helper function to check buffer errors
4043  * @reqOutputBufferLength:  max buffer length expected in command response
4044  * @rsp:        query info response buffer contains output buffer length
4045  * @rsp_org:        base response buffer pointer in case of chained response
4046  * @infoclass_size: query info class response buffer size
4047  *
4048  * Return:  0 on success, otherwise error
4049  */
4050 static int buffer_check_err(int reqOutputBufferLength,
4051                 struct smb2_query_info_rsp *rsp,
4052                 void *rsp_org, int infoclass_size)
4053 {
4054     if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4055         if (reqOutputBufferLength < infoclass_size) {
4056             pr_err("Invalid Buffer Size Requested\n");
4057             rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4058             *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4059             return -EINVAL;
4060         }
4061
4062         ksmbd_debug(SMB, "Buffer Overflow\n");
4063         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
4064         *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr) +
4065                 reqOutputBufferLength);
4066         rsp->OutputBufferLength = cpu_to_le32(reqOutputBufferLength);
4067     }
4068     return 0;
4069 }
4070
4071 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4072                    void *rsp_org)
4073 {
4074     struct smb2_file_standard_info *sinfo;
4075
4076     sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4077
4078     sinfo->AllocationSize = cpu_to_le64(4096);
4079     sinfo->EndOfFile = cpu_to_le64(0);
4080     sinfo->NumberOfLinks = cpu_to_le32(1);
4081     sinfo->DeletePending = 1;
4082     sinfo->Directory = 0;
4083     rsp->OutputBufferLength =
4084         cpu_to_le32(sizeof(struct smb2_file_standard_info));
4085     inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_standard_info));
4086 }
4087
4088 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4089                    void *rsp_org)
4090 {
4091     struct smb2_file_internal_info *file_info;
4092
4093     file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4094
4095     /* any unique number */
4096     file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4097     rsp->OutputBufferLength =
4098         cpu_to_le32(sizeof(struct smb2_file_internal_info));
4099     inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info));
4100 }
4101
4102 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4103                    struct smb2_query_info_req *req,
4104                    struct smb2_query_info_rsp *rsp,
4105                    void *rsp_org)
4106 {
4107     u64 id;
4108     int rc;
4109
4110     /*
4111      * Windows can sometime send query file info request on
4112      * pipe without opening it, checking error condition here
4113      */
4114     id = req->VolatileFileId;
4115     if (!ksmbd_session_rpc_method(sess, id))
4116         return -ENOENT;
4117
4118     ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4119             req->FileInfoClass, req->VolatileFileId);
4120
4121     switch (req->FileInfoClass) {
4122     case FILE_STANDARD_INFORMATION:
4123         get_standard_info_pipe(rsp, rsp_org);
4124         rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4125                       rsp, rsp_org,
4126                       FILE_STANDARD_INFORMATION_SIZE);
4127         break;
4128     case FILE_INTERNAL_INFORMATION:
4129         get_internal_info_pipe(rsp, id, rsp_org);
4130         rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4131                       rsp, rsp_org,
4132                       FILE_INTERNAL_INFORMATION_SIZE);
4133         break;
4134     default:
4135         ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4136                 req->FileInfoClass);
4137         rc = -EOPNOTSUPP;
4138     }
4139     return rc;
4140 }
4141
4142 /**
4143  * smb2_get_ea() - handler for smb2 get extended attribute command
4144  * @work:   smb work containing query info command buffer
4145  * @fp:     ksmbd_file pointer
4146  * @req:    get extended attribute request
4147  * @rsp:    response buffer pointer
4148  * @rsp_org:    base response buffer pointer in case of chained response
4149  *
4150  * Return:  0 on success, otherwise error
4151  */
4152 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4153                struct smb2_query_info_req *req,
4154                struct smb2_query_info_rsp *rsp, void *rsp_org)
4155 {
4156     struct smb2_ea_info *eainfo, *prev_eainfo;
4157     char *name, *ptr, *xattr_list = NULL, *buf;
4158     int rc, name_len, value_len, xattr_list_len, idx;
4159     ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4160     struct smb2_ea_info_req *ea_req = NULL;
4161     struct path *path;
4162     struct user_namespace *user_ns = file_mnt_user_ns(fp->filp);
4163
4164     if (!(fp->daccess & FILE_READ_EA_LE)) {
4165         pr_err("Not permitted to read ext attr : 0x%x\n",
4166                fp->daccess);
4167         return -EACCES;
4168     }
4169
4170     path = &fp->filp->f_path;
4171     /* single EA entry is requested with given user.* name */
4172     if (req->InputBufferLength) {
4173         if (le32_to_cpu(req->InputBufferLength) <
4174             sizeof(struct smb2_ea_info_req))
4175             return -EINVAL;
4176
4177         ea_req = (struct smb2_ea_info_req *)req->Buffer;
4178     } else {
4179         /* need to send all EAs, if no specific EA is requested*/
4180         if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4181             ksmbd_debug(SMB,
4182                     "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4183                     le32_to_cpu(req->Flags));
4184     }
4185
4186     buf_free_len =
4187         smb2_calc_max_out_buf_len(work, 8,
4188                       le32_to_cpu(req->OutputBufferLength));
4189     if (buf_free_len < 0)
4190         return -EINVAL;
4191
4192     rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4193     if (rc < 0) {
4194         rsp->hdr.Status = STATUS_INVALID_HANDLE;
4195         goto out;
4196     } else if (!rc) { /* there is no EA in the file */
4197         ksmbd_debug(SMB, "no ea data in the file\n");
4198         goto done;
4199     }
4200     xattr_list_len = rc;
4201
4202     ptr = (char *)rsp->Buffer;
4203     eainfo = (struct smb2_ea_info *)ptr;
4204     prev_eainfo = eainfo;
4205     idx = 0;
4206
4207     while (idx < xattr_list_len) {
4208         name = xattr_list + idx;
4209         name_len = strlen(name);
4210
4211         ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4212         idx += name_len + 1;
4213
4214         /*
4215          * CIFS does not support EA other than user.* namespace,
4216          * still keep the framework generic, to list other attrs
4217          * in future.
4218          */
4219         if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4220             continue;
4221
4222         if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4223                  STREAM_PREFIX_LEN))
4224             continue;
4225
4226         if (req->InputBufferLength &&
4227             strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4228                 ea_req->EaNameLength))
4229             continue;
4230
4231         if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4232                  DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4233             continue;
4234
4235         if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4236             name_len -= XATTR_USER_PREFIX_LEN;
4237
4238         ptr = (char *)(&eainfo->name + name_len + 1);
4239         buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4240                 name_len + 1);
4241         /* bailout if xattr can't fit in buf_free_len */
4242         value_len = ksmbd_vfs_getxattr(user_ns, path->dentry,
4243                            name, &buf);
4244         if (value_len <= 0) {
4245             rc = -ENOENT;
4246             rsp->hdr.Status = STATUS_INVALID_HANDLE;
4247             goto out;
4248         }
4249
4250         buf_free_len -= value_len;
4251         if (buf_free_len < 0) {
4252             kfree(buf);
4253             break;
4254         }
4255
4256         memcpy(ptr, buf, value_len);
4257         kfree(buf);
4258
4259         ptr += value_len;
4260         eainfo->Flags = 0;
4261         eainfo->EaNameLength = name_len;
4262
4263         if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4264             memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4265                    name_len);
4266         else
4267             memcpy(eainfo->name, name, name_len);
4268
4269         eainfo->name[name_len] = '\0';
4270         eainfo->EaValueLength = cpu_to_le16(value_len);
4271         next_offset = offsetof(struct smb2_ea_info, name) +
4272             name_len + 1 + value_len;
4273
4274         /* align next xattr entry at 4 byte bundary */
4275         alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4276         if (alignment_bytes) {
4277             memset(ptr, '\0', alignment_bytes);
4278             ptr += alignment_bytes;
4279             next_offset += alignment_bytes;
4280             buf_free_len -= alignment_bytes;
4281         }
4282         eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4283         prev_eainfo = eainfo;
4284         eainfo = (struct smb2_ea_info *)ptr;
4285         rsp_data_cnt += next_offset;
4286
4287         if (req->InputBufferLength) {
4288             ksmbd_debug(SMB, "single entry requested\n");
4289             break;
4290         }
4291     }
4292
4293     /* no more ea entries */
4294     prev_eainfo->NextEntryOffset = 0;
4295 done:
4296     rc = 0;
4297     if (rsp_data_cnt == 0)
4298         rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4299     rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4300     inc_rfc1001_len(rsp_org, rsp_data_cnt);
4301 out:
4302     kvfree(xattr_list);
4303     return rc;
4304 }
4305
4306 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4307                  struct ksmbd_file *fp, void *rsp_org)
4308 {
4309     struct smb2_file_access_info *file_info;
4310
4311     file_info = (struct smb2_file_access_info *)rsp->Buffer;
4312     file_info->AccessFlags = fp->daccess;
4313     rsp->OutputBufferLength =
4314         cpu_to_le32(sizeof(struct smb2_file_access_info));
4315     inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_access_info));
4316 }
4317
4318 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4319                    struct ksmbd_file *fp, void *rsp_org)
4320 {
4321     struct smb2_file_basic_info *basic_info;
4322     struct kstat stat;
4323     u64 time;
4324
4325     if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4326         pr_err("no right to read the attributes : 0x%x\n",
4327                fp->daccess);
4328         return -EACCES;
4329     }
4330
4331     basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4332     generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4333              &stat);
4334     basic_info->CreationTime = cpu_to_le64(fp->create_time);
4335     time = ksmbd_UnixTimeToNT(stat.atime);
4336     basic_info->LastAccessTime = cpu_to_le64(time);
4337     time = ksmbd_UnixTimeToNT(stat.mtime);
4338     basic_info->LastWriteTime = cpu_to_le64(time);
4339     time = ksmbd_UnixTimeToNT(stat.ctime);
4340     basic_info->ChangeTime = cpu_to_le64(time);
4341     basic_info->Attributes = fp->f_ci->m_fattr;
4342     basic_info->Pad1 = 0;
4343     rsp->OutputBufferLength =
4344         cpu_to_le32(sizeof(struct smb2_file_basic_info));
4345     inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_basic_info));
4346     return 0;
4347 }
4348
4349 static unsigned long long get_allocation_size(struct inode *inode,
4350                           struct kstat *stat)
4351 {
4352     unsigned long long alloc_size = 0;
4353
4354     if (!S_ISDIR(stat->mode)) {
4355         if ((inode->i_blocks << 9) <= stat->size)
4356             alloc_size = stat->size;
4357         else
4358             alloc_size = inode->i_blocks << 9;
4359     }
4360
4361     return alloc_size;
4362 }
4363
4364 static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
4365                    struct ksmbd_file *fp, void *rsp_org)
4366 {
4367     struct smb2_file_standard_info *sinfo;
4368     unsigned int delete_pending;
4369     struct inode *inode;
4370     struct kstat stat;
4371
4372     inode = file_inode(fp->filp);
4373     generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4374
4375     sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4376     delete_pending = ksmbd_inode_pending_delete(fp);
4377
4378     sinfo->AllocationSize = cpu_to_le64(get_allocation_size(inode, &stat));
4379     sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4380     sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4381     sinfo->DeletePending = delete_pending;
4382     sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4383     rsp->OutputBufferLength =
4384         cpu_to_le32(sizeof(struct smb2_file_standard_info));
4385     inc_rfc1001_len(rsp_org,
4386             sizeof(struct smb2_file_standard_info));
4387 }
4388
4389 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4390                     void *rsp_org)
4391 {
4392     struct smb2_file_alignment_info *file_info;
4393
4394     file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4395     file_info->AlignmentRequirement = 0;
4396     rsp->OutputBufferLength =
4397         cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4398     inc_rfc1001_len(rsp_org,
4399             sizeof(struct smb2_file_alignment_info));
4400 }
4401
4402 static int get_file_all_info(struct ksmbd_work *work,
4403                  struct smb2_query_info_rsp *rsp,
4404                  struct ksmbd_file *fp,
4405                  void *rsp_org)
4406 {
4407     struct ksmbd_conn *conn = work->conn;
4408     struct smb2_file_all_info *file_info;
4409     unsigned int delete_pending;
4410     struct inode *inode;
4411     struct kstat stat;
4412     int conv_len;
4413     char *filename;
4414     u64 time;
4415
4416     if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4417         ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4418                 fp->daccess);
4419         return -EACCES;
4420     }
4421
4422     filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4423     if (IS_ERR(filename))
4424         return PTR_ERR(filename);
4425
4426     inode = file_inode(fp->filp);
4427     generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4428
4429     ksmbd_debug(SMB, "filename = %s\n", filename);
4430     delete_pending = ksmbd_inode_pending_delete(fp);
4431     file_info = (struct smb2_file_all_info *)rsp->Buffer;
4432
4433     file_info->CreationTime = cpu_to_le64(fp->create_time);
4434     time = ksmbd_UnixTimeToNT(stat.atime);
4435     file_info->LastAccessTime = cpu_to_le64(time);
4436     time = ksmbd_UnixTimeToNT(stat.mtime);
4437     file_info->LastWriteTime = cpu_to_le64(time);
4438     time = ksmbd_UnixTimeToNT(stat.ctime);
4439     file_info->ChangeTime = cpu_to_le64(time);
4440     file_info->Attributes = fp->f_ci->m_fattr;
4441     file_info->Pad1 = 0;
4442     file_info->AllocationSize =
4443         cpu_to_le64(get_allocation_size(inode, &stat));
4444     file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4445     file_info->NumberOfLinks =
4446             cpu_to_le32(get_nlink(&stat) - delete_pending);
4447     file_info->DeletePending = delete_pending;
4448     file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4449     file_info->Pad2 = 0;
4450     file_info->IndexNumber = cpu_to_le64(stat.ino);
4451     file_info->EASize = 0;
4452     file_info->AccessFlags = fp->daccess;
4453     file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4454     file_info->Mode = fp->coption;
4455     file_info->AlignmentRequirement = 0;
4456     conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4457                      PATH_MAX, conn->local_nls, 0);
4458     conv_len *= 2;
4459     file_info->FileNameLength = cpu_to_le32(conv_len);
4460     rsp->OutputBufferLength =
4461         cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4462     kfree(filename);
4463     inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
4464     return 0;
4465 }
4466
4467 static void get_file_alternate_info(struct ksmbd_work *work,
4468                     struct smb2_query_info_rsp *rsp,
4469                     struct ksmbd_file *fp,
4470                     void *rsp_org)
4471 {
4472     struct ksmbd_conn *conn = work->conn;
4473     struct smb2_file_alt_name_info *file_info;
4474     struct dentry *dentry = fp->filp->f_path.dentry;
4475     int conv_len;
4476
4477     spin_lock(&dentry->d_lock);
4478     file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4479     conv_len = ksmbd_extract_shortname(conn,
4480                        dentry->d_name.name,
4481                        file_info->FileName);
4482     spin_unlock(&dentry->d_lock);
4483     file_info->FileNameLength = cpu_to_le32(conv_len);
4484     rsp->OutputBufferLength =
4485         cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4486     inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
4487 }
4488
4489 static void get_file_stream_info(struct ksmbd_work *work,
4490                  struct smb2_query_info_rsp *rsp,
4491                  struct ksmbd_file *fp,
4492                  void *rsp_org)
4493 {
4494     struct ksmbd_conn *conn = work->conn;
4495     struct smb2_file_stream_info *file_info;
4496     char *stream_name, *xattr_list = NULL, *stream_buf;
4497     struct kstat stat;
4498     struct path *path = &fp->filp->f_path;
4499     ssize_t xattr_list_len;
4500     int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4501     int buf_free_len;
4502     struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4503
4504     generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4505              &stat);
4506     file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4507
4508     buf_free_len =
4509         smb2_calc_max_out_buf_len(work, 8,
4510                       le32_to_cpu(req->OutputBufferLength));
4511     if (buf_free_len < 0)
4512         goto out;
4513
4514     xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4515     if (xattr_list_len < 0) {
4516         goto out;
4517     } else if (!xattr_list_len) {
4518         ksmbd_debug(SMB, "empty xattr in the file\n");
4519         goto out;
4520     }
4521
4522     while (idx < xattr_list_len) {
4523         stream_name = xattr_list + idx;
4524         streamlen = strlen(stream_name);
4525         idx += streamlen + 1;
4526
4527         ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4528
4529         if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4530                 STREAM_PREFIX, STREAM_PREFIX_LEN))
4531             continue;
4532
4533         stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4534                 STREAM_PREFIX_LEN);
4535         streamlen = stream_name_len;
4536
4537         /* plus : size */
4538         streamlen += 1;
4539         stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4540         if (!stream_buf)
4541             break;
4542
4543         streamlen = snprintf(stream_buf, streamlen + 1,
4544                      ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4545
4546         next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4547         if (next > buf_free_len) {
4548             kfree(stream_buf);
4549             break;
4550         }
4551
4552         file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4553         streamlen  = smbConvertToUTF16((__le16 *)file_info->StreamName,
4554                            stream_buf, streamlen,
4555                            conn->local_nls, 0);
4556         streamlen *= 2;
4557         kfree(stream_buf);
4558         file_info->StreamNameLength = cpu_to_le32(streamlen);
4559         file_info->StreamSize = cpu_to_le64(stream_name_len);
4560         file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4561
4562         nbytes += next;
4563         buf_free_len -= next;
4564         file_info->NextEntryOffset = cpu_to_le32(next);
4565     }
4566
4567 out:
4568     if (!S_ISDIR(stat.mode) &&
4569         buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4570         file_info = (struct smb2_file_stream_info *)
4571             &rsp->Buffer[nbytes];
4572         streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4573                           "::$DATA", 7, conn->local_nls, 0);
4574         streamlen *= 2;
4575         file_info->StreamNameLength = cpu_to_le32(streamlen);
4576         file_info->StreamSize = cpu_to_le64(stat.size);
4577         file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
4578         nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4579     }
4580
4581     /* last entry offset should be 0 */
4582     file_info->NextEntryOffset = 0;
4583     kvfree(xattr_list);
4584
4585     rsp->OutputBufferLength = cpu_to_le32(nbytes);
4586     inc_rfc1001_len(rsp_org, nbytes);
4587 }
4588
4589 static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
4590                    struct ksmbd_file *fp, void *rsp_org)
4591 {
4592     struct smb2_file_internal_info *file_info;
4593     struct kstat stat;
4594
4595     generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4596              &stat);
4597     file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4598     file_info->IndexNumber = cpu_to_le64(stat.ino);
4599     rsp->OutputBufferLength =
4600         cpu_to_le32(sizeof(struct smb2_file_internal_info));
4601     inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info));
4602 }
4603
4604 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
4605                       struct ksmbd_file *fp, void *rsp_org)
4606 {
4607     struct smb2_file_ntwrk_info *file_info;
4608     struct inode *inode;
4609     struct kstat stat;
4610     u64 time;
4611
4612     if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4613         pr_err("no right to read the attributes : 0x%x\n",
4614                fp->daccess);
4615         return -EACCES;
4616     }
4617
4618     file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
4619
4620     inode = file_inode(fp->filp);
4621     generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4622
4623     file_info->CreationTime = cpu_to_le64(fp->create_time);
4624     time = ksmbd_UnixTimeToNT(stat.atime);
4625     file_info->LastAccessTime = cpu_to_le64(time);
4626     time = ksmbd_UnixTimeToNT(stat.mtime);
4627     file_info->LastWriteTime = cpu_to_le64(time);
4628     time = ksmbd_UnixTimeToNT(stat.ctime);
4629     file_info->ChangeTime = cpu_to_le64(time);
4630     file_info->Attributes = fp->f_ci->m_fattr;
4631     file_info->AllocationSize =
4632         cpu_to_le64(get_allocation_size(inode, &stat));
4633     file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4634     file_info->Reserved = cpu_to_le32(0);
4635     rsp->OutputBufferLength =
4636         cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
4637     inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ntwrk_info));
4638     return 0;
4639 }
4640
4641 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
4642 {
4643     struct smb2_file_ea_info *file_info;
4644
4645     file_info = (struct smb2_file_ea_info *)rsp->Buffer;
4646     file_info->EASize = 0;
4647     rsp->OutputBufferLength =
4648         cpu_to_le32(sizeof(struct smb2_file_ea_info));
4649     inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ea_info));
4650 }
4651
4652 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
4653                    struct ksmbd_file *fp, void *rsp_org)
4654 {
4655     struct smb2_file_pos_info *file_info;
4656
4657     file_info = (struct smb2_file_pos_info *)rsp->Buffer;
4658     file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4659     rsp->OutputBufferLength =
4660         cpu_to_le32(sizeof(struct smb2_file_pos_info));
4661     inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_pos_info));
4662 }
4663
4664 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
4665                    struct ksmbd_file *fp, void *rsp_org)
4666 {
4667     struct smb2_file_mode_info *file_info;
4668
4669     file_info = (struct smb2_file_mode_info *)rsp->Buffer;
4670     file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
4671     rsp->OutputBufferLength =
4672         cpu_to_le32(sizeof(struct smb2_file_mode_info));
4673     inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_mode_info));
4674 }
4675
4676 static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
4677                       struct ksmbd_file *fp, void *rsp_org)
4678 {
4679     struct smb2_file_comp_info *file_info;
4680     struct kstat stat;
4681
4682     generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4683              &stat);
4684
4685     file_info = (struct smb2_file_comp_info *)rsp->Buffer;
4686     file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
4687     file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
4688     file_info->CompressionUnitShift = 0;
4689     file_info->ChunkShift = 0;
4690     file_info->ClusterShift = 0;
4691     memset(&file_info->Reserved[0], 0, 3);
4692
4693     rsp->OutputBufferLength =
4694         cpu_to_le32(sizeof(struct smb2_file_comp_info));
4695     inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_comp_info));
4696 }
4697
4698 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
4699                        struct ksmbd_file *fp, void *rsp_org)
4700 {
4701     struct smb2_file_attr_tag_info *file_info;
4702
4703     if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4704         pr_err("no right to read the attributes : 0x%x\n",
4705                fp->daccess);
4706         return -EACCES;
4707     }
4708
4709     file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
4710     file_info->FileAttributes = fp->f_ci->m_fattr;
4711     file_info->ReparseTag = 0;
4712     rsp->OutputBufferLength =
4713         cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
4714     inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_attr_tag_info));
4715     return 0;
4716 }
4717
4718 static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
4719                 struct ksmbd_file *fp, void *rsp_org)
4720 {
4721     struct smb311_posix_qinfo *file_info;
4722     struct inode *inode = file_inode(fp->filp);
4723     u64 time;
4724
4725     file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
4726     file_info->CreationTime = cpu_to_le64(fp->create_time);
4727     time = ksmbd_UnixTimeToNT(inode->i_atime);
4728     file_info->LastAccessTime = cpu_to_le64(time);
4729     time = ksmbd_UnixTimeToNT(inode->i_mtime);
4730     file_info->LastWriteTime = cpu_to_le64(time);
4731     time = ksmbd_UnixTimeToNT(inode->i_ctime);
4732     file_info->ChangeTime = cpu_to_le64(time);
4733     file_info->DosAttributes = fp->f_ci->m_fattr;
4734     file_info->Inode = cpu_to_le64(inode->i_ino);
4735     file_info->EndOfFile = cpu_to_le64(inode->i_size);
4736     file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4737     file_info->HardLinks = cpu_to_le32(inode->i_nlink);
4738     file_info->Mode = cpu_to_le32(inode->i_mode);
4739     file_info->DeviceId = cpu_to_le32(inode->i_rdev);
4740     rsp->OutputBufferLength =
4741         cpu_to_le32(sizeof(struct smb311_posix_qinfo));
4742     inc_rfc1001_len(rsp_org, sizeof(struct smb311_posix_qinfo));
4743     return 0;
4744 }
4745
4746 static int smb2_get_info_file(struct ksmbd_work *work,
4747                   struct smb2_query_info_req *req,
4748                   struct smb2_query_info_rsp *rsp)
4749 {
4750     struct ksmbd_file *fp;
4751     int fileinfoclass = 0;
4752     int rc = 0;
4753     int file_infoclass_size;
4754     unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
4755
4756     if (test_share_config_flag(work->tcon->share_conf,
4757                    KSMBD_SHARE_FLAG_PIPE)) {
4758         /* smb2 info file called for pipe */
4759         return smb2_get_info_file_pipe(work->sess, req, rsp,
4760                            work->response_buf);
4761     }
4762
4763     if (work->next_smb2_rcv_hdr_off) {
4764         if (!has_file_id(req->VolatileFileId)) {
4765             ksmbd_debug(SMB, "Compound request set FID = %llu\n",
4766                     work->compound_fid);
4767             id = work->compound_fid;
4768             pid = work->compound_pfid;
4769         }
4770     }
4771
4772     if (!has_file_id(id)) {
4773         id = req->VolatileFileId;
4774         pid = req->PersistentFileId;
4775     }
4776
4777     fp = ksmbd_lookup_fd_slow(work, id, pid);
4778     if (!fp)
4779         return -ENOENT;
4780
4781     fileinfoclass = req->FileInfoClass;
4782
4783     switch (fileinfoclass) {
4784     case FILE_ACCESS_INFORMATION:
4785         get_file_access_info(rsp, fp, work->response_buf);
4786         file_infoclass_size = FILE_ACCESS_INFORMATION_SIZE;
4787         break;
4788
4789     case FILE_BASIC_INFORMATION:
4790         rc = get_file_basic_info(rsp, fp, work->response_buf);
4791         file_infoclass_size = FILE_BASIC_INFORMATION_SIZE;
4792         break;
4793
4794     case FILE_STANDARD_INFORMATION:
4795         get_file_standard_info(rsp, fp, work->response_buf);
4796         file_infoclass_size = FILE_STANDARD_INFORMATION_SIZE;
4797         break;
4798
4799     case FILE_ALIGNMENT_INFORMATION:
4800         get_file_alignment_info(rsp, work->response_buf);
4801         file_infoclass_size = FILE_ALIGNMENT_INFORMATION_SIZE;
4802         break;
4803
4804     case FILE_ALL_INFORMATION:
4805         rc = get_file_all_info(work, rsp, fp, work->response_buf);
4806         file_infoclass_size = FILE_ALL_INFORMATION_SIZE;
4807         break;
4808
4809     case FILE_ALTERNATE_NAME_INFORMATION:
4810         get_file_alternate_info(work, rsp, fp, work->response_buf);
4811         file_infoclass_size = FILE_ALTERNATE_NAME_INFORMATION_SIZE;
4812         break;
4813
4814     case FILE_STREAM_INFORMATION:
4815         get_file_stream_info(work, rsp, fp, work->response_buf);
4816         file_infoclass_size = FILE_STREAM_INFORMATION_SIZE;
4817         break;
4818
4819     case FILE_INTERNAL_INFORMATION:
4820         get_file_internal_info(rsp, fp, work->response_buf);
4821         file_infoclass_size = FILE_INTERNAL_INFORMATION_SIZE;
4822         break;
4823
4824     case FILE_NETWORK_OPEN_INFORMATION:
4825         rc = get_file_network_open_info(rsp, fp, work->response_buf);
4826         file_infoclass_size = FILE_NETWORK_OPEN_INFORMATION_SIZE;
4827         break;
4828
4829     case FILE_EA_INFORMATION:
4830         get_file_ea_info(rsp, work->response_buf);
4831         file_infoclass_size = FILE_EA_INFORMATION_SIZE;
4832         break;
4833
4834     case FILE_FULL_EA_INFORMATION:
4835         rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
4836         file_infoclass_size = FILE_FULL_EA_INFORMATION_SIZE;
4837         break;
4838
4839     case FILE_POSITION_INFORMATION:
4840         get_file_position_info(rsp, fp, work->response_buf);
4841         file_infoclass_size = FILE_POSITION_INFORMATION_SIZE;
4842         break;
4843
4844     case FILE_MODE_INFORMATION:
4845         get_file_mode_info(rsp, fp, work->response_buf);
4846         file_infoclass_size = FILE_MODE_INFORMATION_SIZE;
4847         break;
4848
4849     case FILE_COMPRESSION_INFORMATION:
4850         get_file_compression_info(rsp, fp, work->response_buf);
4851         file_infoclass_size = FILE_COMPRESSION_INFORMATION_SIZE;
4852         break;
4853
4854     case FILE_ATTRIBUTE_TAG_INFORMATION:
4855         rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
4856         file_infoclass_size = FILE_ATTRIBUTE_TAG_INFORMATION_SIZE;
4857         break;
4858     case SMB_FIND_FILE_POSIX_INFO:
4859         if (!work->tcon->posix_extensions) {
4860             pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
4861             rc = -EOPNOTSUPP;
4862         } else {
4863             rc = find_file_posix_info(rsp, fp, work->response_buf);
4864             file_infoclass_size = sizeof(struct smb311_posix_qinfo);
4865         }
4866         break;
4867     default:
4868         ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
4869                 fileinfoclass);
4870         rc = -EOPNOTSUPP;
4871     }
4872     if (!rc)
4873         rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4874                       rsp, work->response_buf,
4875                       file_infoclass_size);
4876     ksmbd_fd_put(work, fp);
4877     return rc;
4878 }
4879
4880 static int smb2_get_info_filesystem(struct ksmbd_work *work,
4881                     struct smb2_query_info_req *req,
4882                     struct smb2_query_info_rsp *rsp)
4883 {
4884     struct ksmbd_session *sess = work->sess;
4885     struct ksmbd_conn *conn = work->conn;
4886     struct ksmbd_share_config *share = work->tcon->share_conf;
4887     int fsinfoclass = 0;
4888     struct kstatfs stfs;
4889     struct path path;
4890     int rc = 0, len;
4891     int fs_infoclass_size = 0;
4892
4893     rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
4894     if (rc) {
4895         pr_err("cannot create vfs path\n");
4896         return -EIO;
4897     }
4898
4899     rc = vfs_statfs(&path, &stfs);
4900     if (rc) {
4901         pr_err("cannot do stat of path %s\n", share->path);
4902         path_put(&path);
4903         return -EIO;
4904     }
4905
4906     fsinfoclass = req->FileInfoClass;
4907
4908     switch (fsinfoclass) {
4909     case FS_DEVICE_INFORMATION:
4910     {
4911         struct filesystem_device_info *info;
4912
4913         info = (struct filesystem_device_info *)rsp->Buffer;
4914
4915         info->DeviceType = cpu_to_le32(stfs.f_type);
4916         info->DeviceCharacteristics = cpu_to_le32(0x00000020);
4917         rsp->OutputBufferLength = cpu_to_le32(8);
4918         inc_rfc1001_len(work->response_buf, 8);
4919         fs_infoclass_size = FS_DEVICE_INFORMATION_SIZE;
4920         break;
4921     }
4922     case FS_ATTRIBUTE_INFORMATION:
4923     {
4924         struct filesystem_attribute_info *info;
4925         size_t sz;
4926
4927         info = (struct filesystem_attribute_info *)rsp->Buffer;
4928         info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
4929                            FILE_PERSISTENT_ACLS |
4930                            FILE_UNICODE_ON_DISK |
4931                            FILE_CASE_PRESERVED_NAMES |
4932                            FILE_CASE_SENSITIVE_SEARCH |
4933                            FILE_SUPPORTS_BLOCK_REFCOUNTING);
4934
4935         info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
4936
4937         info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
4938         len = smbConvertToUTF16((__le16 *)info->FileSystemName,
4939                     "NTFS", PATH_MAX, conn->local_nls, 0);
4940         len = len * 2;
4941         info->FileSystemNameLen = cpu_to_le32(len);
4942         sz = sizeof(struct filesystem_attribute_info) - 2 + len;
4943         rsp->OutputBufferLength = cpu_to_le32(sz);
4944         inc_rfc1001_len(work->response_buf, sz);
4945         fs_infoclass_size = FS_ATTRIBUTE_INFORMATION_SIZE;
4946         break;
4947     }
4948     case FS_VOLUME_INFORMATION:
4949     {
4950         struct filesystem_vol_info *info;
4951         size_t sz;
4952         unsigned int serial_crc = 0;
4953
4954         info = (struct filesystem_vol_info *)(rsp->Buffer);
4955         info->VolumeCreationTime = 0;
4956         serial_crc = crc32_le(serial_crc, share->name,
4957                       strlen(share->name));
4958         serial_crc = crc32_le(serial_crc, share->path,
4959                       strlen(share->path));
4960         serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
4961                       strlen(ksmbd_netbios_name()));
4962         /* Taking dummy value of serial number*/
4963         info->SerialNumber = cpu_to_le32(serial_crc);
4964         len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
4965                     share->name, PATH_MAX,
4966                     conn->local_nls, 0);
4967         len = len * 2;
4968         info->VolumeLabelSize = cpu_to_le32(len);
4969         info->Reserved = 0;
4970         sz = sizeof(struct filesystem_vol_info) - 2 + len;
4971         rsp->OutputBufferLength = cpu_to_le32(sz);
4972         inc_rfc1001_len(work->response_buf, sz);
4973         fs_infoclass_size = FS_VOLUME_INFORMATION_SIZE;
4974         break;
4975     }
4976     case FS_SIZE_INFORMATION:
4977     {
4978         struct filesystem_info *info;
4979
4980         info = (struct filesystem_info *)(rsp->Buffer);
4981         info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
4982         info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
4983         info->SectorsPerAllocationUnit = cpu_to_le32(1);
4984         info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
4985         rsp->OutputBufferLength = cpu_to_le32(24);
4986         inc_rfc1001_len(work->response_buf, 24);
4987         fs_infoclass_size = FS_SIZE_INFORMATION_SIZE;
4988         break;
4989     }
4990     case FS_FULL_SIZE_INFORMATION:
4991     {
4992         struct smb2_fs_full_size_info *info;
4993
4994         info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
4995         info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
4996         info->CallerAvailableAllocationUnits =
4997                     cpu_to_le64(stfs.f_bavail);
4998         info->ActualAvailableAllocationUnits =
4999                     cpu_to_le64(stfs.f_bfree);
5000         info->SectorsPerAllocationUnit = cpu_to_le32(1);
5001         info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5002         rsp->OutputBufferLength = cpu_to_le32(32);
5003         inc_rfc1001_len(work->response_buf, 32);
5004         fs_infoclass_size = FS_FULL_SIZE_INFORMATION_SIZE;
5005         break;
5006     }
5007     case FS_OBJECT_ID_INFORMATION:
5008     {
5009         struct object_id_info *info;
5010
5011         info = (struct object_id_info *)(rsp->Buffer);
5012
5013         if (!user_guest(sess->user))
5014             memcpy(info->objid, user_passkey(sess->user), 16);
5015         else
5016             memset(info->objid, 0, 16);
5017
5018         info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5019         info->extended_info.version = cpu_to_le32(1);
5020         info->extended_info.release = cpu_to_le32(1);
5021         info->extended_info.rel_date = 0;
5022         memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5023         rsp->OutputBufferLength = cpu_to_le32(64);
5024         inc_rfc1001_len(work->response_buf, 64);
5025         fs_infoclass_size = FS_OBJECT_ID_INFORMATION_SIZE;
5026         break;
5027     }
5028     case FS_SECTOR_SIZE_INFORMATION:
5029     {
5030         struct smb3_fs_ss_info *info;
5031         unsigned int sector_size =
5032             min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5033
5034         info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5035
5036         info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5037         info->PhysicalBytesPerSectorForAtomicity =
5038                 cpu_to_le32(sector_size);
5039         info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5040         info->FSEffPhysicalBytesPerSectorForAtomicity =
5041                 cpu_to_le32(sector_size);
5042         info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5043                     SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5044         info->ByteOffsetForSectorAlignment = 0;
5045         info->ByteOffsetForPartitionAlignment = 0;
5046         rsp->OutputBufferLength = cpu_to_le32(28);
5047         inc_rfc1001_len(work->response_buf, 28);
5048         fs_infoclass_size = FS_SECTOR_SIZE_INFORMATION_SIZE;
5049         break;
5050     }
5051     case FS_CONTROL_INFORMATION:
5052     {
5053         /*
5054          * TODO : The current implementation is based on
5055          * test result with win7(NTFS) server. It's need to
5056          * modify this to get valid Quota values
5057          * from Linux kernel
5058          */
5059         struct smb2_fs_control_info *info;
5060
5061         info = (struct smb2_fs_control_info *)(rsp->Buffer);
5062         info->FreeSpaceStartFiltering = 0;
5063         info->FreeSpaceThreshold = 0;
5064         info->FreeSpaceStopFiltering = 0;
5065         info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5066         info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5067         info->Padding = 0;
5068         rsp->OutputBufferLength = cpu_to_le32(48);
5069         inc_rfc1001_len(work->response_buf, 48);
5070         fs_infoclass_size = FS_CONTROL_INFORMATION_SIZE;
5071         break;
5072     }
5073     case FS_POSIX_INFORMATION:
5074     {
5075         struct filesystem_posix_info *info;
5076
5077         if (!work->tcon->posix_extensions) {
5078             pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5079             rc = -EOPNOTSUPP;
5080         } else {
5081             info = (struct filesystem_posix_info *)(rsp->Buffer);
5082             info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5083             info->BlockSize = cpu_to_le32(stfs.f_bsize);
5084             info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5085             info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5086             info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5087             info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5088             info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5089             rsp->OutputBufferLength = cpu_to_le32(56);
5090             inc_rfc1001_len(work->response_buf, 56);
5091             fs_infoclass_size = FS_POSIX_INFORMATION_SIZE;
5092         }
5093         break;
5094     }
5095     default:
5096         path_put(&path);
5097         return -EOPNOTSUPP;
5098     }
5099     rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5100                   rsp, work->response_buf,
5101                   fs_infoclass_size);
5102     path_put(&path);
5103     return rc;
5104 }
5105
5106 static int smb2_get_info_sec(struct ksmbd_work *work,
5107                  struct smb2_query_info_req *req,
5108                  struct smb2_query_info_rsp *rsp)
5109 {
5110     struct ksmbd_file *fp;
5111     struct user_namespace *user_ns;
5112     struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5113     struct smb_fattr fattr = {{0}};
5114     struct inode *inode;
5115     __u32 secdesclen = 0;
5116     unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5117     int addition_info = le32_to_cpu(req->AdditionalInformation);
5118     int rc = 0, ppntsd_size = 0;
5119
5120     if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5121                   PROTECTED_DACL_SECINFO |
5122                   UNPROTECTED_DACL_SECINFO)) {
5123         ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5124                addition_info);
5125
5126         pntsd->revision = cpu_to_le16(1);
5127         pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5128         pntsd->osidoffset = 0;
5129         pntsd->gsidoffset = 0;
5130         pntsd->sacloffset = 0;
5131         pntsd->dacloffset = 0;
5132
5133         secdesclen = sizeof(struct smb_ntsd);
5134         rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5135         inc_rfc1001_len(work->response_buf, secdesclen);
5136
5137         return 0;
5138     }
5139
5140     if (work->next_smb2_rcv_hdr_off) {
5141         if (!has_file_id(req->VolatileFileId)) {
5142             ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5143                     work->compound_fid);
5144             id = work->compound_fid;
5145             pid = work->compound_pfid;
5146         }
5147     }
5148
5149     if (!has_file_id(id)) {
5150         id = req->VolatileFileId;
5151         pid = req->PersistentFileId;
5152     }
5153
5154     fp = ksmbd_lookup_fd_slow(work, id, pid);
5155     if (!fp)
5156         return -ENOENT;
5157
5158     user_ns = file_mnt_user_ns(fp->filp);
5159     inode = file_inode(fp->filp);
5160     ksmbd_acls_fattr(&fattr, user_ns, inode);
5161
5162     if (test_share_config_flag(work->tcon->share_conf,
5163                    KSMBD_SHARE_FLAG_ACL_XATTR))
5164         ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, user_ns,
5165                              fp->filp->f_path.dentry,
5166                              &ppntsd);
5167
5168     /* Check if sd buffer size exceeds response buffer size */
5169     if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5170         rc = build_sec_desc(user_ns, pntsd, ppntsd, ppntsd_size,
5171                     addition_info, &secdesclen, &fattr);
5172     posix_acl_release(fattr.cf_acls);
5173     posix_acl_release(fattr.cf_dacls);
5174     kfree(ppntsd);
5175     ksmbd_fd_put(work, fp);
5176     if (rc)
5177         return rc;
5178
5179     rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5180     inc_rfc1001_len(work->response_buf, secdesclen);
5181     return 0;
5182 }
5183
5184 /**
5185  * smb2_query_info() - handler for smb2 query info command
5186  * @work:   smb work containing query info request buffer
5187  *
5188  * Return:  0 on success, otherwise error
5189  */
5190 int smb2_query_info(struct ksmbd_work *work)
5191 {
5192     struct smb2_query_info_req *req;
5193     struct smb2_query_info_rsp *rsp;
5194     int rc = 0;
5195
5196     WORK_BUFFERS(work, req, rsp);
5197
5198     ksmbd_debug(SMB, "GOT query info request\n");
5199
5200     switch (req->InfoType) {
5201     case SMB2_O_INFO_FILE:
5202         ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5203         rc = smb2_get_info_file(work, req, rsp);
5204         break;
5205     case SMB2_O_INFO_FILESYSTEM:
5206         ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5207         rc = smb2_get_info_filesystem(work, req, rsp);
5208         break;
5209     case SMB2_O_INFO_SECURITY:
5210         ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5211         rc = smb2_get_info_sec(work, req, rsp);
5212         break;
5213     default:
5214         ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5215                 req->InfoType);
5216         rc = -EOPNOTSUPP;
5217     }
5218
5219     if (rc < 0) {
5220         if (rc == -EACCES)
5221             rsp->hdr.Status = STATUS_ACCESS_DENIED;
5222         else if (rc == -ENOENT)
5223             rsp->hdr.Status = STATUS_FILE_CLOSED;
5224         else if (rc == -EIO)
5225             rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5226         else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5227             rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5228         smb2_set_err_rsp(work);
5229
5230         ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5231                 rc);
5232         return rc;
5233     }
5234     rsp->StructureSize = cpu_to_le16(9);
5235     rsp->OutputBufferOffset = cpu_to_le16(72);
5236     inc_rfc1001_len(work->response_buf, 8);
5237     return 0;
5238 }
5239
5240 /**
5241  * smb2_close_pipe() - handler for closing IPC pipe
5242  * @work:   smb work containing close request buffer
5243  *
5244  * Return:  0
5245  */
5246 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5247 {
5248     u64 id;
5249     struct smb2_close_req *req = smb2_get_msg(work->request_buf);
5250     struct smb2_close_rsp *rsp = smb2_get_msg(work->response_buf);
5251
5252     id = req->VolatileFileId;
5253     ksmbd_session_rpc_close(work->sess, id);
5254
5255     rsp->StructureSize = cpu_to_le16(60);
5256     rsp->Flags = 0;
5257     rsp->Reserved = 0;
5258     rsp->CreationTime = 0;
5259     rsp->LastAccessTime = 0;
5260     rsp->LastWriteTime = 0;
5261     rsp->ChangeTime = 0;
5262     rsp->AllocationSize = 0;
5263     rsp->EndOfFile = 0;
5264     rsp->Attributes = 0;
5265     inc_rfc1001_len(work->response_buf, 60);
5266     return 0;
5267 }
5268
5269 /**
5270  * smb2_close() - handler for smb2 close file command
5271  * @work:   smb work containing close request buffer
5272  *
5273  * Return:  0
5274  */
5275 int smb2_close(struct ksmbd_work *work)
5276 {
5277     u64 volatile_id = KSMBD_NO_FID;
5278     u64 sess_id;
5279     struct smb2_close_req *req;
5280     struct smb2_close_rsp *rsp;
5281     struct ksmbd_conn *conn = work->conn;
5282     struct ksmbd_file *fp;
5283     struct inode *inode;
5284     u64 time;
5285     int err = 0;
5286
5287     WORK_BUFFERS(work, req, rsp);
5288
5289     if (test_share_config_flag(work->tcon->share_conf,
5290                    KSMBD_SHARE_FLAG_PIPE)) {
5291         ksmbd_debug(SMB, "IPC pipe close request\n");
5292         return smb2_close_pipe(work);
5293     }
5294
5295     sess_id = le64_to_cpu(req->hdr.SessionId);
5296     if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5297         sess_id = work->compound_sid;
5298
5299     work->compound_sid = 0;
5300     if (check_session_id(conn, sess_id)) {
5301         work->compound_sid = sess_id;
5302     } else {
5303         rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5304         if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5305             rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5306         err = -EBADF;
5307         goto out;
5308     }
5309
5310     if (work->next_smb2_rcv_hdr_off &&
5311         !has_file_id(req->VolatileFileId)) {
5312         if (!has_file_id(work->compound_fid)) {
5313             /* file already closed, return FILE_CLOSED */
5314             ksmbd_debug(SMB, "file already closed\n");
5315             rsp->hdr.Status = STATUS_FILE_CLOSED;
5316             err = -EBADF;
5317             goto out;
5318         } else {
5319             ksmbd_debug(SMB,
5320                     "Compound request set FID = %llu:%llu\n",
5321                     work->compound_fid,
5322                     work->compound_pfid);
5323             volatile_id = work->compound_fid;
5324
5325             /* file closed, stored id is not valid anymore */
5326             work->compound_fid = KSMBD_NO_FID;
5327             work->compound_pfid = KSMBD_NO_FID;
5328         }
5329     } else {
5330         volatile_id = req->VolatileFileId;
5331     }
5332     ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5333
5334     rsp->StructureSize = cpu_to_le16(60);
5335     rsp->Reserved = 0;
5336
5337     if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5338         fp = ksmbd_lookup_fd_fast(work, volatile_id);
5339         if (!fp) {
5340             err = -ENOENT;
5341             goto out;
5342         }
5343
5344         inode = file_inode(fp->filp);
5345         rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5346         rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
5347             cpu_to_le64(inode->i_blocks << 9);
5348         rsp->EndOfFile = cpu_to_le64(inode->i_size);
5349         rsp->Attributes = fp->f_ci->m_fattr;
5350         rsp->CreationTime = cpu_to_le64(fp->create_time);
5351         time = ksmbd_UnixTimeToNT(inode->i_atime);
5352         rsp->LastAccessTime = cpu_to_le64(time);
5353         time = ksmbd_UnixTimeToNT(inode->i_mtime);
5354         rsp->LastWriteTime = cpu_to_le64(time);
5355         time = ksmbd_UnixTimeToNT(inode->i_ctime);
5356         rsp->ChangeTime = cpu_to_le64(time);
5357         ksmbd_fd_put(work, fp);
5358     } else {
5359         rsp->Flags = 0;
5360         rsp->AllocationSize = 0;
5361         rsp->EndOfFile = 0;
5362         rsp->Attributes = 0;
5363         rsp->CreationTime = 0;
5364         rsp->LastAccessTime = 0;
5365         rsp->LastWriteTime = 0;
5366         rsp->ChangeTime = 0;
5367     }
5368
5369     err = ksmbd_close_fd(work, volatile_id);
5370 out:
5371     if (err) {
5372         if (rsp->hdr.Status == 0)
5373             rsp->hdr.Status = STATUS_FILE_CLOSED;
5374         smb2_set_err_rsp(work);
5375     } else {
5376         inc_rfc1001_len(work->response_buf, 60);
5377     }
5378
5379     return 0;
5380 }
5381
5382 /**
5383  * smb2_echo() - handler for smb2 echo(ping) command
5384  * @work:   smb work containing echo request buffer
5385  *
5386  * Return:  0
5387  */
5388 int smb2_echo(struct ksmbd_work *work)
5389 {
5390     struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5391
5392     rsp->StructureSize = cpu_to_le16(4);
5393     rsp->Reserved = 0;
5394     inc_rfc1001_len(work->response_buf, 4);
5395     return 0;
5396 }
5397
5398 static int smb2_rename(struct ksmbd_work *work,
5399                struct ksmbd_file *fp,
5400                struct user_namespace *user_ns,
5401                struct smb2_file_rename_info *file_info,
5402                struct nls_table *local_nls)
5403 {
5404     struct ksmbd_share_config *share = fp->tcon->share_conf;
5405     char *new_name = NULL, *abs_oldname = NULL, *old_name = NULL;
5406     char *pathname = NULL;
5407     struct path path;
5408     bool file_present = true;
5409     int rc;
5410
5411     ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5412     pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5413     if (!pathname)
5414         return -ENOMEM;
5415
5416     abs_oldname = d_path(&fp->filp->f_path, pathname, PATH_MAX);
5417     if (IS_ERR(abs_oldname)) {
5418         rc = -EINVAL;
5419         goto out;
5420     }
5421     old_name = strrchr(abs_oldname, '/');
5422     if (old_name && old_name[1] != '\0') {
5423         old_name++;
5424     } else {
5425         ksmbd_debug(SMB, "can't get last component in path %s\n",
5426                 abs_oldname);
5427         rc = -ENOENT;
5428         goto out;
5429     }
5430
5431     new_name = smb2_get_name(file_info->FileName,
5432                  le32_to_cpu(file_info->FileNameLength),
5433                  local_nls);
5434     if (IS_ERR(new_name)) {
5435         rc = PTR_ERR(new_name);
5436         goto out;
5437     }
5438
5439     if (strchr(new_name, ':')) {
5440         int s_type;
5441         char *xattr_stream_name, *stream_name = NULL;
5442         size_t xattr_stream_size;
5443         int len;
5444
5445         rc = parse_stream_name(new_name, &stream_name, &s_type);
5446         if (rc < 0)
5447             goto out;
5448
5449         len = strlen(new_name);
5450         if (len > 0 && new_name[len - 1] != '/') {
5451             pr_err("not allow base filename in rename\n");
5452             rc = -ESHARE;
5453             goto out;
5454         }
5455
5456         rc = ksmbd_vfs_xattr_stream_name(stream_name,
5457                          &xattr_stream_name,
5458                          &xattr_stream_size,
5459                          s_type);
5460         if (rc)
5461             goto out;
5462
5463         rc = ksmbd_vfs_setxattr(user_ns,
5464                     fp->filp->f_path.dentry,
5465                     xattr_stream_name,
5466                     NULL, 0, 0);
5467         if (rc < 0) {
5468             pr_err("failed to store stream name in xattr: %d\n",
5469                    rc);
5470             rc = -EINVAL;
5471             goto out;
5472         }
5473
5474         goto out;
5475     }
5476
5477     ksmbd_debug(SMB, "new name %s\n", new_name);
5478     rc = ksmbd_vfs_kern_path(work, new_name, LOOKUP_NO_SYMLINKS, &path, 1);
5479     if (rc) {
5480         if (rc != -ENOENT)
5481             goto out;
5482         file_present = false;
5483     } else {
5484         path_put(&path);
5485     }
5486
5487     if (ksmbd_share_veto_filename(share, new_name)) {
5488         rc = -ENOENT;
5489         ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5490         goto out;
5491     }
5492
5493     if (file_info->ReplaceIfExists) {
5494         if (file_present) {
5495             rc = ksmbd_vfs_remove_file(work, new_name);
5496             if (rc) {
5497                 if (rc != -ENOTEMPTY)
5498                     rc = -EINVAL;
5499                 ksmbd_debug(SMB, "cannot delete %s, rc %d\n",
5500                         new_name, rc);
5501                 goto out;
5502             }
5503         }
5504     } else {
5505         if (file_present &&
5506             strncmp(old_name, path.dentry->d_name.name, strlen(old_name))) {
5507             rc = -EEXIST;
5508             ksmbd_debug(SMB,
5509                     "cannot rename already existing file\n");
5510             goto out;
5511         }
5512     }
5513
5514     rc = ksmbd_vfs_fp_rename(work, fp, new_name);
5515 out:
5516     kfree(pathname);
5517     if (!IS_ERR(new_name))
5518         kfree(new_name);
5519     return rc;
5520 }
5521
5522 static int smb2_create_link(struct ksmbd_work *work,
5523                 struct ksmbd_share_config *share,
5524                 struct smb2_file_link_info *file_info,
5525                 unsigned int buf_len, struct file *filp,
5526                 struct nls_table *local_nls)
5527 {
5528     char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5529     struct path path;
5530     bool file_present = true;
5531     int rc;
5532
5533     if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5534             le32_to_cpu(file_info->FileNameLength))
5535         return -EINVAL;
5536
5537     ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5538     pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5539     if (!pathname)
5540         return -ENOMEM;
5541
5542     link_name = smb2_get_name(file_info->FileName,
5543                   le32_to_cpu(file_info->FileNameLength),
5544                   local_nls);
5545     if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5546         rc = -EINVAL;
5547         goto out;
5548     }
5549
5550     ksmbd_debug(SMB, "link name is %s\n", link_name);
5551     target_name = d_path(&filp->f_path, pathname, PATH_MAX);
5552     if (IS_ERR(target_name)) {
5553         rc = -EINVAL;
5554         goto out;
5555     }
5556
5557     ksmbd_debug(SMB, "target name is %s\n", target_name);
5558     rc = ksmbd_vfs_kern_path(work, link_name, LOOKUP_NO_SYMLINKS, &path, 0);
5559     if (rc) {
5560         if (rc != -ENOENT)
5561             goto out;
5562         file_present = false;
5563     } else {
5564         path_put(&path);
5565     }
5566
5567     if (file_info->ReplaceIfExists) {
5568         if (file_present) {
5569             rc = ksmbd_vfs_remove_file(work, link_name);
5570             if (rc) {
5571                 rc = -EINVAL;
5572                 ksmbd_debug(SMB, "cannot delete %s\n",
5573                         link_name);
5574                 goto out;
5575             }
5576         }
5577     } else {
5578         if (file_present) {
5579             rc = -EEXIST;
5580             ksmbd_debug(SMB, "link already exists\n");
5581             goto out;
5582         }
5583     }
5584
5585     rc = ksmbd_vfs_link(work, target_name, link_name);
5586     if (rc)
5587         rc = -EINVAL;
5588 out:
5589     if (!IS_ERR(link_name))
5590         kfree(link_name);
5591     kfree(pathname);
5592     return rc;
5593 }
5594
5595 static int set_file_basic_info(struct ksmbd_file *fp,
5596                    struct smb2_file_basic_info *file_info,
5597                    struct ksmbd_share_config *share)
5598 {
5599     struct iattr attrs;
5600     struct file *filp;
5601     struct inode *inode;
5602     struct user_namespace *user_ns;
5603     int rc = 0;
5604
5605     if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5606         return -EACCES;
5607
5608     attrs.ia_valid = 0;
5609     filp = fp->filp;
5610     inode = file_inode(filp);
5611     user_ns = file_mnt_user_ns(filp);
5612
5613     if (file_info->CreationTime)
5614         fp->create_time = le64_to_cpu(file_info->CreationTime);
5615
5616     if (file_info->LastAccessTime) {
5617         attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5618         attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5619     }
5620
5621     attrs.ia_valid |= ATTR_CTIME;
5622     if (file_info->ChangeTime)
5623         attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
5624     else
5625         attrs.ia_ctime = inode->i_ctime;
5626
5627     if (file_info->LastWriteTime) {
5628         attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
5629         attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
5630     }
5631
5632     if (file_info->Attributes) {
5633         if (!S_ISDIR(inode->i_mode) &&
5634             file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
5635             pr_err("can't change a file to a directory\n");
5636             return -EINVAL;
5637         }
5638
5639         if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
5640             fp->f_ci->m_fattr = file_info->Attributes |
5641                 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
5642     }
5643
5644     if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
5645         (file_info->CreationTime || file_info->Attributes)) {
5646         struct xattr_dos_attrib da = {0};
5647
5648         da.version = 4;
5649         da.itime = fp->itime;
5650         da.create_time = fp->create_time;
5651         da.attr = le32_to_cpu(fp->f_ci->m_fattr);
5652         da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
5653             XATTR_DOSINFO_ITIME;
5654
5655         rc = ksmbd_vfs_set_dos_attrib_xattr(user_ns,
5656                             filp->f_path.dentry, &da);
5657         if (rc)
5658             ksmbd_debug(SMB,
5659                     "failed to restore file attribute in EA\n");
5660         rc = 0;
5661     }
5662
5663     if (attrs.ia_valid) {
5664         struct dentry *dentry = filp->f_path.dentry;
5665         struct inode *inode = d_inode(dentry);
5666
5667         if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
5668             return -EACCES;
5669
5670         inode_lock(inode);
5671         inode->i_ctime = attrs.ia_ctime;
5672         attrs.ia_valid &= ~ATTR_CTIME;
5673         rc = notify_change(user_ns, dentry, &attrs, NULL);
5674         inode_unlock(inode);
5675     }
5676     return rc;
5677 }
5678
5679 static int set_file_allocation_info(struct ksmbd_work *work,
5680                     struct ksmbd_file *fp,
5681                     struct smb2_file_alloc_info *file_alloc_info)
5682 {
5683     /*
5684      * TODO : It's working fine only when store dos attributes
5685      * is not yes. need to implement a logic which works
5686      * properly with any smb.conf option
5687      */
5688
5689     loff_t alloc_blks;
5690     struct inode *inode;
5691     int rc;
5692
5693     if (!(fp->daccess & FILE_WRITE_DATA_LE))
5694         return -EACCES;
5695
5696     alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
5697     inode = file_inode(fp->filp);
5698
5699     if (alloc_blks > inode->i_blocks) {
5700         smb_break_all_levII_oplock(work, fp, 1);
5701         rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
5702                    alloc_blks * 512);
5703         if (rc && rc != -EOPNOTSUPP) {
5704             pr_err("vfs_fallocate is failed : %d\n", rc);
5705             return rc;
5706         }
5707     } else if (alloc_blks < inode->i_blocks) {
5708         loff_t size;
5709
5710         /*
5711          * Allocation size could be smaller than original one
5712          * which means allocated blocks in file should be
5713          * deallocated. use truncate to cut out it, but inode
5714          * size is also updated with truncate offset.
5715          * inode size is retained by backup inode size.
5716          */
5717         size = i_size_read(inode);
5718         rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
5719         if (rc) {
5720             pr_err("truncate failed!, err %d\n", rc);
5721             return rc;
5722         }
5723         if (size < alloc_blks * 512)
5724             i_size_write(inode, size);
5725     }
5726     return 0;
5727 }
5728
5729 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5730                 struct smb2_file_eof_info *file_eof_info)
5731 {
5732     loff_t newsize;
5733     struct inode *inode;
5734     int rc;
5735
5736     if (!(fp->daccess & FILE_WRITE_DATA_LE))
5737         return -EACCES;
5738
5739     newsize = le64_to_cpu(file_eof_info->EndOfFile);
5740     inode = file_inode(fp->filp);
5741
5742     /*
5743      * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
5744      * on FAT32 shared device, truncate execution time is too long
5745      * and network error could cause from windows client. because
5746      * truncate of some filesystem like FAT32 fill zero data in
5747      * truncated range.
5748      */
5749     if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
5750         ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
5751         rc = ksmbd_vfs_truncate(work, fp, newsize);
5752         if (rc) {
5753             ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
5754             if (rc != -EAGAIN)
5755                 rc = -EBADF;
5756             return rc;
5757         }
5758     }
5759     return 0;
5760 }
5761
5762 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5763                struct smb2_file_rename_info *rename_info,
5764                unsigned int buf_len)
5765 {
5766     struct user_namespace *user_ns;
5767     struct ksmbd_file *parent_fp;
5768     struct dentry *parent;
5769     struct dentry *dentry = fp->filp->f_path.dentry;
5770     int ret;
5771
5772     if (!(fp->daccess & FILE_DELETE_LE)) {
5773         pr_err("no right to delete : 0x%x\n", fp->daccess);
5774         return -EACCES;
5775     }
5776
5777     if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
5778             le32_to_cpu(rename_info->FileNameLength))
5779         return -EINVAL;
5780
5781     user_ns = file_mnt_user_ns(fp->filp);
5782     if (ksmbd_stream_fd(fp))
5783         goto next;
5784
5785     parent = dget_parent(dentry);
5786     ret = ksmbd_vfs_lock_parent(user_ns, parent, dentry);
5787     if (ret) {
5788         dput(parent);
5789         return ret;
5790     }
5791
5792     parent_fp = ksmbd_lookup_fd_inode(d_inode(parent));
5793     inode_unlock(d_inode(parent));
5794     dput(parent);
5795
5796     if (parent_fp) {
5797         if (parent_fp->daccess & FILE_DELETE_LE) {
5798             pr_err("parent dir is opened with delete access\n");
5799             ksmbd_fd_put(work, parent_fp);
5800             return -ESHARE;
5801         }
5802         ksmbd_fd_put(work, parent_fp);
5803     }
5804 next:
5805     return smb2_rename(work, fp, user_ns, rename_info,
5806                work->conn->local_nls);
5807 }
5808
5809 static int set_file_disposition_info(struct ksmbd_file *fp,
5810                      struct smb2_file_disposition_info *file_info)
5811 {
5812     struct inode *inode;
5813
5814     if (!(fp->daccess & FILE_DELETE_LE)) {
5815         pr_err("no right to delete : 0x%x\n", fp->daccess);
5816         return -EACCES;
5817     }
5818
5819     inode = file_inode(fp->filp);
5820     if (file_info->DeletePending) {
5821         if (S_ISDIR(inode->i_mode) &&
5822             ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
5823             return -EBUSY;
5824         ksmbd_set_inode_pending_delete(fp);
5825     } else {
5826         ksmbd_clear_inode_pending_delete(fp);
5827     }
5828     return 0;
5829 }
5830
5831 static int set_file_position_info(struct ksmbd_file *fp,
5832                   struct smb2_file_pos_info *file_info)
5833 {
5834     loff_t current_byte_offset;
5835     unsigned long sector_size;
5836     struct inode *inode;
5837
5838     inode = file_inode(fp->filp);
5839     current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
5840     sector_size = inode->i_sb->s_blocksize;
5841
5842     if (current_byte_offset < 0 ||
5843         (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
5844          current_byte_offset & (sector_size - 1))) {
5845         pr_err("CurrentByteOffset is not valid : %llu\n",
5846                current_byte_offset);
5847         return -EINVAL;
5848     }
5849
5850     fp->filp->f_pos = current_byte_offset;
5851     return 0;
5852 }
5853
5854 static int set_file_mode_info(struct ksmbd_file *fp,
5855                   struct smb2_file_mode_info *file_info)
5856 {
5857     __le32 mode;
5858
5859     mode = file_info->Mode;
5860
5861     if ((mode & ~FILE_MODE_INFO_MASK)) {
5862         pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
5863         return -EINVAL;
5864     }
5865
5866     /*
5867      * TODO : need to implement consideration for
5868      * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
5869      */
5870     ksmbd_vfs_set_fadvise(fp->filp, mode);
5871     fp->coption = mode;
5872     return 0;
5873 }
5874
5875 /**
5876  * smb2_set_info_file() - handler for smb2 set info command
5877  * @work:   smb work containing set info command buffer
5878  * @fp:     ksmbd_file pointer
5879  * @req:    request buffer pointer
5880  * @share:  ksmbd_share_config pointer
5881  *
5882  * Return:  0 on success, otherwise error
5883  * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
5884  */
5885 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
5886                   struct smb2_set_info_req *req,
5887                   struct ksmbd_share_config *share)
5888 {
5889     unsigned int buf_len = le32_to_cpu(req->BufferLength);
5890
5891     switch (req->FileInfoClass) {
5892     case FILE_BASIC_INFORMATION:
5893     {
5894         if (buf_len < sizeof(struct smb2_file_basic_info))
5895             return -EINVAL;
5896
5897         return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share);
5898     }
5899     case FILE_ALLOCATION_INFORMATION:
5900     {
5901         if (buf_len < sizeof(struct smb2_file_alloc_info))
5902             return -EINVAL;
5903
5904         return set_file_allocation_info(work, fp,
5905                         (struct smb2_file_alloc_info *)req->Buffer);
5906     }
5907     case FILE_END_OF_FILE_INFORMATION:
5908     {
5909         if (buf_len < sizeof(struct smb2_file_eof_info))
5910             return -EINVAL;
5911
5912         return set_end_of_file_info(work, fp,
5913                         (struct smb2_file_eof_info *)req->Buffer);
5914     }
5915     case FILE_RENAME_INFORMATION:
5916     {
5917         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5918             ksmbd_debug(SMB,
5919                     "User does not have write permission\n");
5920             return -EACCES;
5921         }
5922
5923         if (buf_len < sizeof(struct smb2_file_rename_info))
5924             return -EINVAL;
5925
5926         return set_rename_info(work, fp,
5927                        (struct smb2_file_rename_info *)req->Buffer,
5928                        buf_len);
5929     }
5930     case FILE_LINK_INFORMATION:
5931     {
5932         if (buf_len < sizeof(struct smb2_file_link_info))
5933             return -EINVAL;
5934
5935         return smb2_create_link(work, work->tcon->share_conf,
5936                     (struct smb2_file_link_info *)req->Buffer,
5937                     buf_len, fp->filp,
5938                     work->conn->local_nls);
5939     }
5940     case FILE_DISPOSITION_INFORMATION:
5941     {
5942         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5943             ksmbd_debug(SMB,
5944                     "User does not have write permission\n");
5945             return -EACCES;
5946         }
5947
5948         if (buf_len < sizeof(struct smb2_file_disposition_info))
5949             return -EINVAL;
5950
5951         return set_file_disposition_info(fp,
5952                          (struct smb2_file_disposition_info *)req->Buffer);
5953     }
5954     case FILE_FULL_EA_INFORMATION:
5955     {
5956         if (!(fp->daccess & FILE_WRITE_EA_LE)) {
5957             pr_err("Not permitted to write ext  attr: 0x%x\n",
5958                    fp->daccess);
5959             return -EACCES;
5960         }
5961
5962         if (buf_len < sizeof(struct smb2_ea_info))
5963             return -EINVAL;
5964
5965         return smb2_set_ea((struct smb2_ea_info *)req->Buffer,
5966                    buf_len, &fp->filp->f_path);
5967     }
5968     case FILE_POSITION_INFORMATION:
5969     {
5970         if (buf_len < sizeof(struct smb2_file_pos_info))
5971             return -EINVAL;
5972
5973         return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer);
5974     }
5975     case FILE_MODE_INFORMATION:
5976     {
5977         if (buf_len < sizeof(struct smb2_file_mode_info))
5978             return -EINVAL;
5979
5980         return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer);
5981     }
5982     }
5983
5984     pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
5985     return -EOPNOTSUPP;
5986 }
5987
5988 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
5989                  char *buffer, int buf_len)
5990 {
5991     struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
5992
5993     fp->saccess |= FILE_SHARE_DELETE_LE;
5994
5995     return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
5996             buf_len, false);
5997 }
5998
5999 /**
6000  * smb2_set_info() - handler for smb2 set info command handler
6001  * @work:   smb work containing set info request buffer
6002  *
6003  * Return:  0 on success, otherwise error
6004  */
6005 int smb2_set_info(struct ksmbd_work *work)
6006 {
6007     struct smb2_set_info_req *req;
6008     struct smb2_set_info_rsp *rsp;
6009     struct ksmbd_file *fp;
6010     int rc = 0;
6011     unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6012
6013     ksmbd_debug(SMB, "Received set info request\n");
6014
6015     if (work->next_smb2_rcv_hdr_off) {
6016         req = ksmbd_req_buf_next(work);
6017         rsp = ksmbd_resp_buf_next(work);
6018         if (!has_file_id(req->VolatileFileId)) {
6019             ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6020                     work->compound_fid);
6021             id = work->compound_fid;
6022             pid = work->compound_pfid;
6023         }
6024     } else {
6025         req = smb2_get_msg(work->request_buf);
6026         rsp = smb2_get_msg(work->response_buf);
6027     }
6028
6029     if (!has_file_id(id)) {
6030         id = req->VolatileFileId;
6031         pid = req->PersistentFileId;
6032     }
6033
6034     fp = ksmbd_lookup_fd_slow(work, id, pid);
6035     if (!fp) {
6036         ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6037         rc = -ENOENT;
6038         goto err_out;
6039     }
6040
6041     switch (req->InfoType) {
6042     case SMB2_O_INFO_FILE:
6043         ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6044         rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6045         break;
6046     case SMB2_O_INFO_SECURITY:
6047         ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6048         if (ksmbd_override_fsids(work)) {
6049             rc = -ENOMEM;
6050             goto err_out;
6051         }
6052         rc = smb2_set_info_sec(fp,
6053                        le32_to_cpu(req->AdditionalInformation),
6054                        req->Buffer,
6055                        le32_to_cpu(req->BufferLength));
6056         ksmbd_revert_fsids(work);
6057         break;
6058     default:
6059         rc = -EOPNOTSUPP;
6060     }
6061
6062     if (rc < 0)
6063         goto err_out;
6064
6065     rsp->StructureSize = cpu_to_le16(2);
6066     inc_rfc1001_len(work->response_buf, 2);
6067     ksmbd_fd_put(work, fp);
6068     return 0;
6069
6070 err_out:
6071     if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6072         rsp->hdr.Status = STATUS_ACCESS_DENIED;
6073     else if (rc == -EINVAL)
6074         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6075     else if (rc == -ESHARE)
6076         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6077     else if (rc == -ENOENT)
6078         rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6079     else if (rc == -EBUSY || rc == -ENOTEMPTY)
6080         rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6081     else if (rc == -EAGAIN)
6082         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6083     else if (rc == -EBADF || rc == -ESTALE)
6084         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6085     else if (rc == -EEXIST)
6086         rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6087     else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6088         rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6089     smb2_set_err_rsp(work);
6090     ksmbd_fd_put(work, fp);
6091     ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6092     return rc;
6093 }
6094
6095 /**
6096  * smb2_read_pipe() - handler for smb2 read from IPC pipe
6097  * @work:   smb work containing read IPC pipe command buffer
6098  *
6099  * Return:  0 on success, otherwise error
6100  */
6101 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6102 {
6103     int nbytes = 0, err;
6104     u64 id;
6105     struct ksmbd_rpc_command *rpc_resp;
6106     struct smb2_read_req *req = smb2_get_msg(work->request_buf);
6107     struct smb2_read_rsp *rsp = smb2_get_msg(work->response_buf);
6108
6109     id = req->VolatileFileId;
6110
6111     inc_rfc1001_len(work->response_buf, 16);
6112     rpc_resp = ksmbd_rpc_read(work->sess, id);
6113     if (rpc_resp) {
6114         if (rpc_resp->flags != KSMBD_RPC_OK) {
6115             err = -EINVAL;
6116             goto out;
6117         }
6118
6119         work->aux_payload_buf =
6120             kvmalloc(rpc_resp->payload_sz, GFP_KERNEL | __GFP_ZERO);
6121         if (!work->aux_payload_buf) {
6122             err = -ENOMEM;
6123             goto out;
6124         }
6125
6126         memcpy(work->aux_payload_buf, rpc_resp->payload,
6127                rpc_resp->payload_sz);
6128
6129         nbytes = rpc_resp->payload_sz;
6130         work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4;
6131         work->aux_payload_sz = nbytes;
6132         kvfree(rpc_resp);
6133     }
6134
6135     rsp->StructureSize = cpu_to_le16(17);
6136     rsp->DataOffset = 80;
6137     rsp->Reserved = 0;
6138     rsp->DataLength = cpu_to_le32(nbytes);
6139     rsp->DataRemaining = 0;
6140     rsp->Flags = 0;
6141     inc_rfc1001_len(work->response_buf, nbytes);
6142     return 0;
6143
6144 out:
6145     rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6146     smb2_set_err_rsp(work);
6147     kvfree(rpc_resp);
6148     return err;
6149 }
6150
6151 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6152                     struct smb2_buffer_desc_v1 *desc,
6153                     __le32 Channel,
6154                     __le16 ChannelInfoLength)
6155 {
6156     unsigned int i, ch_count;
6157
6158     if (work->conn->dialect == SMB30_PROT_ID &&
6159         Channel != SMB2_CHANNEL_RDMA_V1)
6160         return -EINVAL;
6161
6162     ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6163     if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6164         for (i = 0; i < ch_count; i++) {
6165             pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6166                 i,
6167                 le32_to_cpu(desc[i].token),
6168                 le32_to_cpu(desc[i].length));
6169         }
6170     }
6171     if (!ch_count)
6172         return -EINVAL;
6173
6174     work->need_invalidate_rkey =
6175         (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6176     if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6177         work->remote_key = le32_to_cpu(desc->token);
6178     return 0;
6179 }
6180
6181 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6182                       struct smb2_read_req *req, void *data_buf,
6183                       size_t length)
6184 {
6185     int err;
6186
6187     err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6188                     (struct smb2_buffer_desc_v1 *)
6189                     ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6190                     le16_to_cpu(req->ReadChannelInfoLength));
6191     if (err)
6192         return err;
6193
6194     return length;
6195 }
6196
6197 /**
6198  * smb2_read() - handler for smb2 read from file
6199  * @work:   smb work containing read command buffer
6200  *
6201  * Return:  0 on success, otherwise error
6202  */
6203 int smb2_read(struct ksmbd_work *work)
6204 {
6205     struct ksmbd_conn *conn = work->conn;
6206     struct smb2_read_req *req;
6207     struct smb2_read_rsp *rsp;
6208     struct ksmbd_file *fp = NULL;
6209     loff_t offset;
6210     size_t length, mincount;
6211     ssize_t nbytes = 0, remain_bytes = 0;
6212     int err = 0;
6213     bool is_rdma_channel = false;
6214     unsigned int max_read_size = conn->vals->max_read_size;
6215
6216     WORK_BUFFERS(work, req, rsp);
6217
6218     if (test_share_config_flag(work->tcon->share_conf,
6219                    KSMBD_SHARE_FLAG_PIPE)) {
6220         ksmbd_debug(SMB, "IPC pipe read request\n");
6221         return smb2_read_pipe(work);
6222     }
6223
6224     if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6225         req->Channel == SMB2_CHANNEL_RDMA_V1) {
6226         is_rdma_channel = true;
6227         max_read_size = get_smbd_max_read_write_size();
6228     }
6229
6230     if (is_rdma_channel == true) {
6231         unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6232
6233         if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6234             err = -EINVAL;
6235             goto out;
6236         }
6237         err = smb2_set_remote_key_for_rdma(work,
6238                            (struct smb2_buffer_desc_v1 *)
6239                            ((char *)req + ch_offset),
6240                            req->Channel,
6241                            req->ReadChannelInfoLength);
6242         if (err)
6243             goto out;
6244     }
6245
6246     fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6247     if (!fp) {
6248         err = -ENOENT;
6249         goto out;
6250     }
6251
6252     if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6253         pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6254         err = -EACCES;
6255         goto out;
6256     }
6257
6258     offset = le64_to_cpu(req->Offset);
6259     length = le32_to_cpu(req->Length);
6260     mincount = le32_to_cpu(req->MinimumCount);
6261
6262     if (length > max_read_size) {
6263         ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6264                 max_read_size);
6265         err = -EINVAL;
6266         goto out;
6267     }
6268
6269     ksmbd_debug(SMB, "filename %pd, offset %lld, len %zu\n",
6270             fp->filp->f_path.dentry, offset, length);
6271
6272     work->aux_payload_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
6273     if (!work->aux_payload_buf) {
6274         err = -ENOMEM;
6275         goto out;
6276     }
6277
6278     nbytes = ksmbd_vfs_read(work, fp, length, &offset);
6279     if (nbytes < 0) {
6280         err = nbytes;
6281         goto out;
6282     }
6283
6284     if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6285         kvfree(work->aux_payload_buf);
6286         work->aux_payload_buf = NULL;
6287         rsp->hdr.Status = STATUS_END_OF_FILE;
6288         smb2_set_err_rsp(work);
6289         ksmbd_fd_put(work, fp);
6290         return 0;
6291     }
6292
6293     ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6294             nbytes, offset, mincount);
6295
6296     if (is_rdma_channel == true) {
6297         /* write data to the client using rdma channel */
6298         remain_bytes = smb2_read_rdma_channel(work, req,
6299                               work->aux_payload_buf,
6300                               nbytes);
6301         kvfree(work->aux_payload_buf);
6302         work->aux_payload_buf = NULL;
6303
6304         nbytes = 0;
6305         if (remain_bytes < 0) {
6306             err = (int)remain_bytes;
6307             goto out;
6308         }
6309     }
6310
6311     rsp->StructureSize = cpu_to_le16(17);
6312     rsp->DataOffset = 80;
6313     rsp->Reserved = 0;
6314     rsp->DataLength = cpu_to_le32(nbytes);
6315     rsp->DataRemaining = cpu_to_le32(remain_bytes);
6316     rsp->Flags = 0;
6317     inc_rfc1001_len(work->response_buf, 16);
6318     work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4;
6319     work->aux_payload_sz = nbytes;
6320     inc_rfc1001_len(work->response_buf, nbytes);
6321     ksmbd_fd_put(work, fp);
6322     return 0;
6323
6324 out:
6325     if (err) {
6326         if (err == -EISDIR)
6327             rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6328         else if (err == -EAGAIN)
6329             rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6330         else if (err == -ENOENT)
6331             rsp->hdr.Status = STATUS_FILE_CLOSED;
6332         else if (err == -EACCES)
6333             rsp->hdr.Status = STATUS_ACCESS_DENIED;
6334         else if (err == -ESHARE)
6335             rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6336         else if (err == -EINVAL)
6337             rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6338         else
6339             rsp->hdr.Status = STATUS_INVALID_HANDLE;
6340
6341         smb2_set_err_rsp(work);
6342     }
6343     ksmbd_fd_put(work, fp);
6344     return err;
6345 }
6346
6347 /**
6348  * smb2_write_pipe() - handler for smb2 write on IPC pipe
6349  * @work:   smb work containing write IPC pipe command buffer
6350  *
6351  * Return:  0 on success, otherwise error
6352  */
6353 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6354 {
6355     struct smb2_write_req *req = smb2_get_msg(work->request_buf);
6356     struct smb2_write_rsp *rsp = smb2_get_msg(work->response_buf);
6357     struct ksmbd_rpc_command *rpc_resp;
6358     u64 id = 0;
6359     int err = 0, ret = 0;
6360     char *data_buf;
6361     size_t length;
6362
6363     length = le32_to_cpu(req->Length);
6364     id = req->VolatileFileId;
6365
6366     if ((u64)le16_to_cpu(req->DataOffset) + length >
6367         get_rfc1002_len(work->request_buf)) {
6368         pr_err("invalid write data offset %u, smb_len %u\n",
6369                le16_to_cpu(req->DataOffset),
6370                get_rfc1002_len(work->request_buf));
6371         err = -EINVAL;
6372         goto out;
6373     }
6374
6375     data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6376                le16_to_cpu(req->DataOffset));
6377
6378     rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6379     if (rpc_resp) {
6380         if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6381             rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6382             kvfree(rpc_resp);
6383             smb2_set_err_rsp(work);
6384             return -EOPNOTSUPP;
6385         }
6386         if (rpc_resp->flags != KSMBD_RPC_OK) {
6387             rsp->hdr.Status = STATUS_INVALID_HANDLE;
6388             smb2_set_err_rsp(work);
6389             kvfree(rpc_resp);
6390             return ret;
6391         }
6392         kvfree(rpc_resp);
6393     }
6394
6395     rsp->StructureSize = cpu_to_le16(17);
6396     rsp->DataOffset = 0;
6397     rsp->Reserved = 0;
6398     rsp->DataLength = cpu_to_le32(length);
6399     rsp->DataRemaining = 0;
6400     rsp->Reserved2 = 0;
6401     inc_rfc1001_len(work->response_buf, 16);
6402     return 0;
6403 out:
6404     if (err) {
6405         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6406         smb2_set_err_rsp(work);
6407     }
6408
6409     return err;
6410 }
6411
6412 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6413                        struct smb2_write_req *req,
6414                        struct ksmbd_file *fp,
6415                        loff_t offset, size_t length, bool sync)
6416 {
6417     char *data_buf;
6418     int ret;
6419     ssize_t nbytes;
6420
6421     data_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
6422     if (!data_buf)
6423         return -ENOMEM;
6424
6425     ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6426                    (struct smb2_buffer_desc_v1 *)
6427                    ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6428                    le16_to_cpu(req->WriteChannelInfoLength));
6429     if (ret < 0) {
6430         kvfree(data_buf);
6431         return ret;
6432     }
6433
6434     ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6435     kvfree(data_buf);
6436     if (ret < 0)
6437         return ret;
6438
6439     return nbytes;
6440 }
6441
6442 /**
6443  * smb2_write() - handler for smb2 write from file
6444  * @work:   smb work containing write command buffer
6445  *
6446  * Return:  0 on success, otherwise error
6447  */
6448 int smb2_write(struct ksmbd_work *work)
6449 {
6450     struct smb2_write_req *req;
6451     struct smb2_write_rsp *rsp;
6452     struct ksmbd_file *fp = NULL;
6453     loff_t offset;
6454     size_t length;
6455     ssize_t nbytes;
6456     char *data_buf;
6457     bool writethrough = false, is_rdma_channel = false;
6458     int err = 0;
6459     unsigned int max_write_size = work->conn->vals->max_write_size;
6460
6461     WORK_BUFFERS(work, req, rsp);
6462
6463     if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6464         ksmbd_debug(SMB, "IPC pipe write request\n");
6465         return smb2_write_pipe(work);
6466     }
6467
6468     offset = le64_to_cpu(req->Offset);
6469     length = le32_to_cpu(req->Length);
6470
6471     if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6472         req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6473         is_rdma_channel = true;
6474         max_write_size = get_smbd_max_read_write_size();
6475         length = le32_to_cpu(req->RemainingBytes);
6476     }
6477
6478     if (is_rdma_channel == true) {
6479         unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6480
6481         if (req->Length != 0 || req->DataOffset != 0 ||
6482             ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6483             err = -EINVAL;
6484             goto out;
6485         }
6486         err = smb2_set_remote_key_for_rdma(work,
6487                            (struct smb2_buffer_desc_v1 *)
6488                            ((char *)req + ch_offset),
6489                            req->Channel,
6490                            req->WriteChannelInfoLength);
6491         if (err)
6492             goto out;
6493     }
6494
6495     if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6496         ksmbd_debug(SMB, "User does not have write permission\n");
6497         err = -EACCES;
6498         goto out;
6499     }
6500
6501     fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6502     if (!fp) {
6503         err = -ENOENT;
6504         goto out;
6505     }
6506
6507     if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6508         pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6509         err = -EACCES;
6510         goto out;
6511     }
6512
6513     if (length > max_write_size) {
6514         ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6515                 max_write_size);
6516         err = -EINVAL;
6517         goto out;
6518     }
6519
6520     ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6521     if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6522         writethrough = true;
6523
6524     if (is_rdma_channel == false) {
6525         if (le16_to_cpu(req->DataOffset) <
6526             offsetof(struct smb2_write_req, Buffer)) {
6527             err = -EINVAL;
6528             goto out;
6529         }
6530
6531         data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6532                     le16_to_cpu(req->DataOffset));
6533
6534         ksmbd_debug(SMB, "filename %pd, offset %lld, len %zu\n",
6535                 fp->filp->f_path.dentry, offset, length);
6536         err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6537                       writethrough, &nbytes);
6538         if (err < 0)
6539             goto out;
6540     } else {
6541         /* read data from the client using rdma channel, and
6542          * write the data.
6543          */
6544         nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
6545                          writethrough);
6546         if (nbytes < 0) {
6547             err = (int)nbytes;
6548             goto out;
6549         }
6550     }
6551
6552     rsp->StructureSize = cpu_to_le16(17);
6553     rsp->DataOffset = 0;
6554     rsp->Reserved = 0;
6555     rsp->DataLength = cpu_to_le32(nbytes);
6556     rsp->DataRemaining = 0;
6557     rsp->Reserved2 = 0;
6558     inc_rfc1001_len(work->response_buf, 16);
6559     ksmbd_fd_put(work, fp);
6560     return 0;
6561
6562 out:
6563     if (err == -EAGAIN)
6564         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6565     else if (err == -ENOSPC || err == -EFBIG)
6566         rsp->hdr.Status = STATUS_DISK_FULL;
6567     else if (err == -ENOENT)
6568         rsp->hdr.Status = STATUS_FILE_CLOSED;
6569     else if (err == -EACCES)
6570         rsp->hdr.Status = STATUS_ACCESS_DENIED;
6571     else if (err == -ESHARE)
6572         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6573     else if (err == -EINVAL)
6574         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6575     else
6576         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6577
6578     smb2_set_err_rsp(work);
6579     ksmbd_fd_put(work, fp);
6580     return err;
6581 }
6582
6583 /**
6584  * smb2_flush() - handler for smb2 flush file - fsync
6585  * @work:   smb work containing flush command buffer
6586  *
6587  * Return:  0 on success, otherwise error
6588  */
6589 int smb2_flush(struct ksmbd_work *work)
6590 {
6591     struct smb2_flush_req *req;
6592     struct smb2_flush_rsp *rsp;
6593     int err;
6594
6595     WORK_BUFFERS(work, req, rsp);
6596
6597     ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
6598
6599     err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
6600     if (err)
6601         goto out;
6602
6603     rsp->StructureSize = cpu_to_le16(4);
6604     rsp->Reserved = 0;
6605     inc_rfc1001_len(work->response_buf, 4);
6606     return 0;
6607
6608 out:
6609     if (err) {
6610         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6611         smb2_set_err_rsp(work);
6612     }
6613
6614     return err;
6615 }
6616
6617 /**
6618  * smb2_cancel() - handler for smb2 cancel command
6619  * @work:   smb work containing cancel command buffer
6620  *
6621  * Return:  0 on success, otherwise error
6622  */
6623 int smb2_cancel(struct ksmbd_work *work)
6624 {
6625     struct ksmbd_conn *conn = work->conn;
6626     struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
6627     struct smb2_hdr *chdr;
6628     struct ksmbd_work *cancel_work = NULL, *iter;
6629     struct list_head *command_list;
6630
6631     ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
6632             hdr->MessageId, hdr->Flags);
6633
6634     if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
6635         command_list = &conn->async_requests;
6636
6637         spin_lock(&conn->request_lock);
6638         list_for_each_entry(iter, command_list,
6639                     async_request_entry) {
6640             chdr = smb2_get_msg(iter->request_buf);
6641
6642             if (iter->async_id !=
6643                 le64_to_cpu(hdr->Id.AsyncId))
6644                 continue;
6645
6646             ksmbd_debug(SMB,
6647                     "smb2 with AsyncId %llu cancelled command = 0x%x\n",
6648                     le64_to_cpu(hdr->Id.AsyncId),
6649                     le16_to_cpu(chdr->Command));
6650             cancel_work = iter;
6651             break;
6652         }
6653         spin_unlock(&conn->request_lock);
6654     } else {
6655         command_list = &conn->requests;
6656
6657         spin_lock(&conn->request_lock);
6658         list_for_each_entry(iter, command_list, request_entry) {
6659             chdr = smb2_get_msg(iter->request_buf);
6660
6661             if (chdr->MessageId != hdr->MessageId ||
6662                 iter == work)
6663                 continue;
6664
6665             ksmbd_debug(SMB,
6666                     "smb2 with mid %llu cancelled command = 0x%x\n",
6667                     le64_to_cpu(hdr->MessageId),
6668                     le16_to_cpu(chdr->Command));
6669             cancel_work = iter;
6670             break;
6671         }
6672         spin_unlock(&conn->request_lock);
6673     }
6674
6675     if (cancel_work) {
6676         cancel_work->state = KSMBD_WORK_CANCELLED;
6677         if (cancel_work->cancel_fn)
6678             cancel_work->cancel_fn(cancel_work->cancel_argv);
6679     }
6680
6681     /* For SMB2_CANCEL command itself send no response*/
6682     work->send_no_response = 1;
6683     return 0;
6684 }
6685
6686 struct file_lock *smb_flock_init(struct file *f)
6687 {
6688     struct file_lock *fl;
6689
6690     fl = locks_alloc_lock();
6691     if (!fl)
6692         goto out;
6693
6694     locks_init_lock(fl);
6695
6696     fl->fl_owner = f;
6697     fl->fl_pid = current->tgid;
6698     fl->fl_file = f;
6699     fl->fl_flags = FL_POSIX;
6700     fl->fl_ops = NULL;
6701     fl->fl_lmops = NULL;
6702
6703 out:
6704     return fl;
6705 }
6706
6707 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
6708 {
6709     int cmd = -EINVAL;
6710
6711     /* Checking for wrong flag combination during lock request*/
6712     switch (flags) {
6713     case SMB2_LOCKFLAG_SHARED:
6714         ksmbd_debug(SMB, "received shared request\n");
6715         cmd = F_SETLKW;
6716         flock->fl_type = F_RDLCK;
6717         flock->fl_flags |= FL_SLEEP;
6718         break;
6719     case SMB2_LOCKFLAG_EXCLUSIVE:
6720         ksmbd_debug(SMB, "received exclusive request\n");
6721         cmd = F_SETLKW;
6722         flock->fl_type = F_WRLCK;
6723         flock->fl_flags |= FL_SLEEP;
6724         break;
6725     case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6726         ksmbd_debug(SMB,
6727                 "received shared & fail immediately request\n");
6728         cmd = F_SETLK;
6729         flock->fl_type = F_RDLCK;
6730         break;
6731     case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6732         ksmbd_debug(SMB,
6733                 "received exclusive & fail immediately request\n");
6734         cmd = F_SETLK;
6735         flock->fl_type = F_WRLCK;
6736         break;
6737     case SMB2_LOCKFLAG_UNLOCK:
6738         ksmbd_debug(SMB, "received unlock request\n");
6739         flock->fl_type = F_UNLCK;
6740         cmd = 0;
6741         break;
6742     }
6743
6744     return cmd;
6745 }
6746
6747 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
6748                      unsigned int cmd, int flags,
6749                      struct list_head *lock_list)
6750 {
6751     struct ksmbd_lock *lock;
6752
6753     lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
6754     if (!lock)
6755         return NULL;
6756
6757     lock->cmd = cmd;
6758     lock->fl = flock;
6759     lock->start = flock->fl_start;
6760     lock->end = flock->fl_end;
6761     lock->flags = flags;
6762     if (lock->start == lock->end)
6763         lock->zero_len = 1;
6764     INIT_LIST_HEAD(&lock->clist);
6765     INIT_LIST_HEAD(&lock->flist);
6766     INIT_LIST_HEAD(&lock->llist);
6767     list_add_tail(&lock->llist, lock_list);
6768
6769     return lock;
6770 }
6771
6772 static void smb2_remove_blocked_lock(void **argv)
6773 {
6774     struct file_lock *flock = (struct file_lock *)argv[0];
6775
6776     ksmbd_vfs_posix_lock_unblock(flock);
6777     wake_up(&flock->fl_wait);
6778 }
6779
6780 static inline bool lock_defer_pending(struct file_lock *fl)
6781 {
6782     /* check pending lock waiters */
6783     return waitqueue_active(&fl->fl_wait);
6784 }
6785
6786 /**
6787  * smb2_lock() - handler for smb2 file lock command
6788  * @work:   smb work containing lock command buffer
6789  *
6790  * Return:  0 on success, otherwise error
6791  */
6792 int smb2_lock(struct ksmbd_work *work)
6793 {
6794     struct smb2_lock_req *req = smb2_get_msg(work->request_buf);
6795     struct smb2_lock_rsp *rsp = smb2_get_msg(work->response_buf);
6796     struct smb2_lock_element *lock_ele;
6797     struct ksmbd_file *fp = NULL;
6798     struct file_lock *flock = NULL;
6799     struct file *filp = NULL;
6800     int lock_count;
6801     int flags = 0;
6802     int cmd = 0;
6803     int err = -EIO, i, rc = 0;
6804     u64 lock_start, lock_length;
6805     struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
6806     struct ksmbd_conn *conn;
6807     int nolock = 0;
6808     LIST_HEAD(lock_list);
6809     LIST_HEAD(rollback_list);
6810     int prior_lock = 0;
6811
6812     ksmbd_debug(SMB, "Received lock request\n");
6813     fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6814     if (!fp) {
6815         ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
6816         err = -ENOENT;
6817         goto out2;
6818     }
6819
6820     filp = fp->filp;
6821     lock_count = le16_to_cpu(req->LockCount);
6822     lock_ele = req->locks;
6823
6824     ksmbd_debug(SMB, "lock count is %d\n", lock_count);
6825     if (!lock_count) {
6826         err = -EINVAL;
6827         goto out2;
6828     }
6829
6830     for (i = 0; i < lock_count; i++) {
6831         flags = le32_to_cpu(lock_ele[i].Flags);
6832
6833         flock = smb_flock_init(filp);
6834         if (!flock)
6835             goto out;
6836
6837         cmd = smb2_set_flock_flags(flock, flags);
6838
6839         lock_start = le64_to_cpu(lock_ele[i].Offset);
6840         lock_length = le64_to_cpu(lock_ele[i].Length);
6841         if (lock_start > U64_MAX - lock_length) {
6842             pr_err("Invalid lock range requested\n");
6843             rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6844             goto out;
6845         }
6846
6847         if (lock_start > OFFSET_MAX)
6848             flock->fl_start = OFFSET_MAX;
6849         else
6850             flock->fl_start = lock_start;
6851
6852         lock_length = le64_to_cpu(lock_ele[i].Length);
6853         if (lock_length > OFFSET_MAX - flock->fl_start)
6854             lock_length = OFFSET_MAX - flock->fl_start;
6855
6856         flock->fl_end = flock->fl_start + lock_length;
6857
6858         if (flock->fl_end < flock->fl_start) {
6859             ksmbd_debug(SMB,
6860                     "the end offset(%llx) is smaller than the start offset(%llx)\n",
6861                     flock->fl_end, flock->fl_start);
6862             rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6863             goto out;
6864         }
6865
6866         /* Check conflict locks in one request */
6867         list_for_each_entry(cmp_lock, &lock_list, llist) {
6868             if (cmp_lock->fl->fl_start <= flock->fl_start &&
6869                 cmp_lock->fl->fl_end >= flock->fl_end) {
6870                 if (cmp_lock->fl->fl_type != F_UNLCK &&
6871                     flock->fl_type != F_UNLCK) {
6872                     pr_err("conflict two locks in one request\n");
6873                     err = -EINVAL;
6874                     goto out;
6875                 }
6876             }
6877         }
6878
6879         smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
6880         if (!smb_lock) {
6881             err = -EINVAL;
6882             goto out;
6883         }
6884     }
6885
6886     list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
6887         if (smb_lock->cmd < 0) {
6888             err = -EINVAL;
6889             goto out;
6890         }
6891
6892         if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
6893             err = -EINVAL;
6894             goto out;
6895         }
6896
6897         if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
6898              smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
6899             (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
6900              !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
6901             err = -EINVAL;
6902             goto out;
6903         }
6904
6905         prior_lock = smb_lock->flags;
6906
6907         if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
6908             !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
6909             goto no_check_cl;
6910
6911         nolock = 1;
6912         /* check locks in connection list */
6913         read_lock(&conn_list_lock);
6914         list_for_each_entry(conn, &conn_list, conns_list) {
6915             spin_lock(&conn->llist_lock);
6916             list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
6917                 if (file_inode(cmp_lock->fl->fl_file) !=
6918                     file_inode(smb_lock->fl->fl_file))
6919                     continue;
6920
6921                 if (smb_lock->fl->fl_type == F_UNLCK) {
6922                     if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
6923                         cmp_lock->start == smb_lock->start &&
6924                         cmp_lock->end == smb_lock->end &&
6925                         !lock_defer_pending(cmp_lock->fl)) {
6926                         nolock = 0;
6927                         list_del(&cmp_lock->flist);
6928                         list_del(&cmp_lock->clist);
6929                         spin_unlock(&conn->llist_lock);
6930                         read_unlock(&conn_list_lock);
6931
6932                         locks_free_lock(cmp_lock->fl);
6933                         kfree(cmp_lock);
6934                         goto out_check_cl;
6935                     }
6936                     continue;
6937                 }
6938
6939                 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
6940                     if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
6941                         continue;
6942                 } else {
6943                     if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
6944                         continue;
6945                 }
6946
6947                 /* check zero byte lock range */
6948                 if (cmp_lock->zero_len && !smb_lock->zero_len &&
6949                     cmp_lock->start > smb_lock->start &&
6950                     cmp_lock->start < smb_lock->end) {
6951                     spin_unlock(&conn->llist_lock);
6952                     read_unlock(&conn_list_lock);
6953                     pr_err("previous lock conflict with zero byte lock range\n");
6954                     goto out;
6955                 }
6956
6957                 if (smb_lock->zero_len && !cmp_lock->zero_len &&
6958                     smb_lock->start > cmp_lock->start &&
6959                     smb_lock->start < cmp_lock->end) {
6960                     spin_unlock(&conn->llist_lock);
6961                     read_unlock(&conn_list_lock);
6962                     pr_err("current lock conflict with zero byte lock range\n");
6963                     goto out;
6964                 }
6965
6966                 if (((cmp_lock->start <= smb_lock->start &&
6967                       cmp_lock->end > smb_lock->start) ||
6968                      (cmp_lock->start < smb_lock->end &&
6969                       cmp_lock->end >= smb_lock->end)) &&
6970                     !cmp_lock->zero_len && !smb_lock->zero_len) {
6971                     spin_unlock(&conn->llist_lock);
6972                     read_unlock(&conn_list_lock);
6973                     pr_err("Not allow lock operation on exclusive lock range\n");
6974                     goto out;
6975                 }
6976             }
6977             spin_unlock(&conn->llist_lock);
6978         }
6979         read_unlock(&conn_list_lock);
6980 out_check_cl:
6981         if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
6982             pr_err("Try to unlock nolocked range\n");
6983             rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
6984             goto out;
6985         }
6986
6987 no_check_cl:
6988         if (smb_lock->zero_len) {
6989             err = 0;
6990             goto skip;
6991         }
6992
6993         flock = smb_lock->fl;
6994         list_del(&smb_lock->llist);
6995 retry:
6996         rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
6997 skip:
6998         if (flags & SMB2_LOCKFLAG_UNLOCK) {
6999             if (!rc) {
7000                 ksmbd_debug(SMB, "File unlocked\n");
7001             } else if (rc == -ENOENT) {
7002                 rsp->hdr.Status = STATUS_NOT_LOCKED;
7003                 goto out;
7004             }
7005             locks_free_lock(flock);
7006             kfree(smb_lock);
7007         } else {
7008             if (rc == FILE_LOCK_DEFERRED) {
7009                 void **argv;
7010
7011                 ksmbd_debug(SMB,
7012                         "would have to wait for getting lock\n");
7013                 spin_lock(&work->conn->llist_lock);
7014                 list_add_tail(&smb_lock->clist,
7015                           &work->conn->lock_list);
7016                 spin_unlock(&work->conn->llist_lock);
7017                 list_add(&smb_lock->llist, &rollback_list);
7018
7019                 argv = kmalloc(sizeof(void *), GFP_KERNEL);
7020                 if (!argv) {
7021                     err = -ENOMEM;
7022                     goto out;
7023                 }
7024                 argv[0] = flock;
7025
7026                 rc = setup_async_work(work,
7027                               smb2_remove_blocked_lock,
7028                               argv);
7029                 if (rc) {
7030                     err = -ENOMEM;
7031                     goto out;
7032                 }
7033                 spin_lock(&fp->f_lock);
7034                 list_add(&work->fp_entry, &fp->blocked_works);
7035                 spin_unlock(&fp->f_lock);
7036
7037                 smb2_send_interim_resp(work, STATUS_PENDING);
7038
7039                 ksmbd_vfs_posix_lock_wait(flock);
7040
7041                 if (work->state != KSMBD_WORK_ACTIVE) {
7042                     list_del(&smb_lock->llist);
7043                     spin_lock(&work->conn->llist_lock);
7044                     list_del(&smb_lock->clist);
7045                     spin_unlock(&work->conn->llist_lock);
7046                     locks_free_lock(flock);
7047
7048                     if (work->state == KSMBD_WORK_CANCELLED) {
7049                         spin_lock(&fp->f_lock);
7050                         list_del(&work->fp_entry);
7051                         spin_unlock(&fp->f_lock);
7052                         rsp->hdr.Status =
7053                             STATUS_CANCELLED;
7054                         kfree(smb_lock);
7055                         smb2_send_interim_resp(work,
7056                                        STATUS_CANCELLED);
7057                         work->send_no_response = 1;
7058                         goto out;
7059                     }
7060                     init_smb2_rsp_hdr(work);
7061                     smb2_set_err_rsp(work);
7062                     rsp->hdr.Status =
7063                         STATUS_RANGE_NOT_LOCKED;
7064                     kfree(smb_lock);
7065                     goto out2;
7066                 }
7067
7068                 list_del(&smb_lock->llist);
7069                 spin_lock(&work->conn->llist_lock);
7070                 list_del(&smb_lock->clist);
7071                 spin_unlock(&work->conn->llist_lock);
7072
7073                 spin_lock(&fp->f_lock);
7074                 list_del(&work->fp_entry);
7075                 spin_unlock(&fp->f_lock);
7076                 goto retry;
7077             } else if (!rc) {
7078                 spin_lock(&work->conn->llist_lock);
7079                 list_add_tail(&smb_lock->clist,
7080                           &work->conn->lock_list);
7081                 list_add_tail(&smb_lock->flist,
7082                           &fp->lock_list);
7083                 spin_unlock(&work->conn->llist_lock);
7084                 list_add(&smb_lock->llist, &rollback_list);
7085                 ksmbd_debug(SMB, "successful in taking lock\n");
7086             } else {
7087                 goto out;
7088             }
7089         }
7090     }
7091
7092     if (atomic_read(&fp->f_ci->op_count) > 1)
7093         smb_break_all_oplock(work, fp);
7094
7095     rsp->StructureSize = cpu_to_le16(4);
7096     ksmbd_debug(SMB, "successful in taking lock\n");
7097     rsp->hdr.Status = STATUS_SUCCESS;
7098     rsp->Reserved = 0;
7099     inc_rfc1001_len(work->response_buf, 4);
7100     ksmbd_fd_put(work, fp);
7101     return 0;
7102
7103 out:
7104     list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7105         locks_free_lock(smb_lock->fl);
7106         list_del(&smb_lock->llist);
7107         kfree(smb_lock);
7108     }
7109
7110     list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7111         struct file_lock *rlock = NULL;
7112
7113         rlock = smb_flock_init(filp);
7114         rlock->fl_type = F_UNLCK;
7115         rlock->fl_start = smb_lock->start;
7116         rlock->fl_end = smb_lock->end;
7117
7118         rc = vfs_lock_file(filp, 0, rlock, NULL);
7119         if (rc)
7120             pr_err("rollback unlock fail : %d\n", rc);
7121
7122         list_del(&smb_lock->llist);
7123         spin_lock(&work->conn->llist_lock);
7124         if (!list_empty(&smb_lock->flist))
7125             list_del(&smb_lock->flist);
7126         list_del(&smb_lock->clist);
7127         spin_unlock(&work->conn->llist_lock);
7128
7129         locks_free_lock(smb_lock->fl);
7130         locks_free_lock(rlock);
7131         kfree(smb_lock);
7132     }
7133 out2:
7134     ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7135
7136     if (!rsp->hdr.Status) {
7137         if (err == -EINVAL)
7138             rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7139         else if (err == -ENOMEM)
7140             rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7141         else if (err == -ENOENT)
7142             rsp->hdr.Status = STATUS_FILE_CLOSED;
7143         else
7144             rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7145     }
7146
7147     smb2_set_err_rsp(work);
7148     ksmbd_fd_put(work, fp);
7149     return err;
7150 }
7151
7152 static int fsctl_copychunk(struct ksmbd_work *work,
7153                struct copychunk_ioctl_req *ci_req,
7154                unsigned int cnt_code,
7155                unsigned int input_count,
7156                unsigned long long volatile_id,
7157                unsigned long long persistent_id,
7158                struct smb2_ioctl_rsp *rsp)
7159 {
7160     struct copychunk_ioctl_rsp *ci_rsp;
7161     struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7162     struct srv_copychunk *chunks;
7163     unsigned int i, chunk_count, chunk_count_written = 0;
7164     unsigned int chunk_size_written = 0;
7165     loff_t total_size_written = 0;
7166     int ret = 0;
7167
7168     ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7169
7170     rsp->VolatileFileId = volatile_id;
7171     rsp->PersistentFileId = persistent_id;
7172     ci_rsp->ChunksWritten =
7173         cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7174     ci_rsp->ChunkBytesWritten =
7175         cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7176     ci_rsp->TotalBytesWritten =
7177         cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7178
7179     chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7180     chunk_count = le32_to_cpu(ci_req->ChunkCount);
7181     if (chunk_count == 0)
7182         goto out;
7183     total_size_written = 0;
7184
7185     /* verify the SRV_COPYCHUNK_COPY packet */
7186     if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7187         input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7188          chunk_count * sizeof(struct srv_copychunk)) {
7189         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7190         return -EINVAL;
7191     }
7192
7193     for (i = 0; i < chunk_count; i++) {
7194         if (le32_to_cpu(chunks[i].Length) == 0 ||
7195             le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7196             break;
7197         total_size_written += le32_to_cpu(chunks[i].Length);
7198     }
7199
7200     if (i < chunk_count ||
7201         total_size_written > ksmbd_server_side_copy_max_total_size()) {
7202         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7203         return -EINVAL;
7204     }
7205
7206     src_fp = ksmbd_lookup_foreign_fd(work,
7207                      le64_to_cpu(ci_req->ResumeKey[0]));
7208     dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7209     ret = -EINVAL;
7210     if (!src_fp ||
7211         src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7212         rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7213         goto out;
7214     }
7215
7216     if (!dst_fp) {
7217         rsp->hdr.Status = STATUS_FILE_CLOSED;
7218         goto out;
7219     }
7220
7221     /*
7222      * FILE_READ_DATA should only be included in
7223      * the FSCTL_COPYCHUNK case
7224      */
7225     if (cnt_code == FSCTL_COPYCHUNK &&
7226         !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7227         rsp->hdr.Status = STATUS_ACCESS_DENIED;
7228         goto out;
7229     }
7230
7231     ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7232                      chunks, chunk_count,
7233                      &chunk_count_written,
7234                      &chunk_size_written,
7235                      &total_size_written);
7236     if (ret < 0) {
7237         if (ret == -EACCES)
7238             rsp->hdr.Status = STATUS_ACCESS_DENIED;
7239         if (ret == -EAGAIN)
7240             rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7241         else if (ret == -EBADF)
7242             rsp->hdr.Status = STATUS_INVALID_HANDLE;
7243         else if (ret == -EFBIG || ret == -ENOSPC)
7244             rsp->hdr.Status = STATUS_DISK_FULL;
7245         else if (ret == -EINVAL)
7246             rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7247         else if (ret == -EISDIR)
7248             rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7249         else if (ret == -E2BIG)
7250             rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7251         else
7252             rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7253     }
7254
7255     ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7256     ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7257     ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7258 out:
7259     ksmbd_fd_put(work, src_fp);
7260     ksmbd_fd_put(work, dst_fp);
7261     return ret;
7262 }
7263
7264 static __be32 idev_ipv4_address(struct in_device *idev)
7265 {
7266     __be32 addr = 0;
7267
7268     struct in_ifaddr *ifa;
7269
7270     rcu_read_lock();
7271     in_dev_for_each_ifa_rcu(ifa, idev) {
7272         if (ifa->ifa_flags & IFA_F_SECONDARY)
7273             continue;
7274
7275         addr = ifa->ifa_address;
7276         break;
7277     }
7278     rcu_read_unlock();
7279     return addr;
7280 }
7281
7282 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7283                     struct smb2_ioctl_rsp *rsp,
7284                     unsigned int out_buf_len)
7285 {
7286     struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7287     int nbytes = 0;
7288     struct net_device *netdev;
7289     struct sockaddr_storage_rsp *sockaddr_storage;
7290     unsigned int flags;
7291     unsigned long long speed;
7292
7293     rtnl_lock();
7294     for_each_netdev(&init_net, netdev) {
7295         bool ipv4_set = false;
7296
7297         if (netdev->type == ARPHRD_LOOPBACK)
7298             continue;
7299
7300         flags = dev_get_flags(netdev);
7301         if (!(flags & IFF_RUNNING))
7302             continue;
7303 ipv6_retry:
7304         if (out_buf_len <
7305             nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7306             rtnl_unlock();
7307             return -ENOSPC;
7308         }
7309
7310         nii_rsp = (struct network_interface_info_ioctl_rsp *)
7311                 &rsp->Buffer[nbytes];
7312         nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7313
7314         nii_rsp->Capability = 0;
7315         if (netdev->real_num_tx_queues > 1)
7316             nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7317         if (ksmbd_rdma_capable_netdev(netdev))
7318             nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7319
7320         nii_rsp->Next = cpu_to_le32(152);
7321         nii_rsp->Reserved = 0;
7322
7323         if (netdev->ethtool_ops->get_link_ksettings) {
7324             struct ethtool_link_ksettings cmd;
7325
7326             netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7327             speed = cmd.base.speed;
7328         } else {
7329             ksmbd_debug(SMB, "%s %s\n", netdev->name,
7330                     "speed is unknown, defaulting to 1Gb/sec");
7331             speed = SPEED_1000;
7332         }
7333
7334         speed *= 1000000;
7335         nii_rsp->LinkSpeed = cpu_to_le64(speed);
7336
7337         sockaddr_storage = (struct sockaddr_storage_rsp *)
7338                     nii_rsp->SockAddr_Storage;
7339         memset(sockaddr_storage, 0, 128);
7340
7341         if (!ipv4_set) {
7342             struct in_device *idev;
7343
7344             sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7345             sockaddr_storage->addr4.Port = 0;
7346
7347             idev = __in_dev_get_rtnl(netdev);
7348             if (!idev)
7349                 continue;
7350             sockaddr_storage->addr4.IPv4address =
7351                         idev_ipv4_address(idev);
7352             nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7353             ipv4_set = true;
7354             goto ipv6_retry;
7355         } else {
7356             struct inet6_dev *idev6;
7357             struct inet6_ifaddr *ifa;
7358             __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7359
7360             sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7361             sockaddr_storage->addr6.Port = 0;
7362             sockaddr_storage->addr6.FlowInfo = 0;
7363
7364             idev6 = __in6_dev_get(netdev);
7365             if (!idev6)
7366                 continue;
7367
7368             list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7369                 if (ifa->flags & (IFA_F_TENTATIVE |
7370                             IFA_F_DEPRECATED))
7371                     continue;
7372                 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7373                 break;
7374             }
7375             sockaddr_storage->addr6.ScopeId = 0;
7376             nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7377         }
7378     }
7379     rtnl_unlock();
7380
7381     /* zero if this is last one */
7382     if (nii_rsp)
7383         nii_rsp->Next = 0;
7384
7385     rsp->PersistentFileId = SMB2_NO_FID;
7386     rsp->VolatileFileId = SMB2_NO_FID;
7387     return nbytes;
7388 }
7389
7390 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7391                      struct validate_negotiate_info_req *neg_req,
7392                      struct validate_negotiate_info_rsp *neg_rsp,
7393                      unsigned int in_buf_len)
7394 {
7395     int ret = 0;
7396     int dialect;
7397
7398     if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7399             le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7400         return -EINVAL;
7401
7402     dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7403                          neg_req->DialectCount);
7404     if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7405         ret = -EINVAL;
7406         goto err_out;
7407     }
7408
7409     if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7410         ret = -EINVAL;
7411         goto err_out;
7412     }
7413
7414     if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7415         ret = -EINVAL;
7416         goto err_out;
7417     }
7418
7419     if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7420         ret = -EINVAL;
7421         goto err_out;
7422     }
7423
7424     neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7425     memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7426     neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7427     neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7428 err_out:
7429     return ret;
7430 }
7431
7432 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7433                     struct file_allocated_range_buffer *qar_req,
7434                     struct file_allocated_range_buffer *qar_rsp,
7435                     unsigned int in_count, unsigned int *out_count)
7436 {
7437     struct ksmbd_file *fp;
7438     loff_t start, length;
7439     int ret = 0;
7440
7441     *out_count = 0;
7442     if (in_count == 0)
7443         return -EINVAL;
7444
7445     fp = ksmbd_lookup_fd_fast(work, id);
7446     if (!fp)
7447         return -ENOENT;
7448
7449     start = le64_to_cpu(qar_req->file_offset);
7450     length = le64_to_cpu(qar_req->length);
7451
7452     ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7453                    qar_rsp, in_count, out_count);
7454     if (ret && ret != -E2BIG)
7455         *out_count = 0;
7456
7457     ksmbd_fd_put(work, fp);
7458     return ret;
7459 }
7460
7461 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7462                  unsigned int out_buf_len,
7463                  struct smb2_ioctl_req *req,
7464                  struct smb2_ioctl_rsp *rsp)
7465 {
7466     struct ksmbd_rpc_command *rpc_resp;
7467     char *data_buf = (char *)&req->Buffer[0];
7468     int nbytes = 0;
7469
7470     rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7471                    le32_to_cpu(req->InputCount));
7472     if (rpc_resp) {
7473         if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7474             /*
7475              * set STATUS_SOME_NOT_MAPPED response
7476              * for unknown domain sid.
7477              */
7478             rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7479         } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7480             rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7481             goto out;
7482         } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7483             rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7484             goto out;
7485         }
7486
7487         nbytes = rpc_resp->payload_sz;
7488         if (rpc_resp->payload_sz > out_buf_len) {
7489             rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7490             nbytes = out_buf_len;
7491         }
7492
7493         if (!rpc_resp->payload_sz) {
7494             rsp->hdr.Status =
7495                 STATUS_UNEXPECTED_IO_ERROR;
7496             goto out;
7497         }
7498
7499         memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7500     }
7501 out:
7502     kvfree(rpc_resp);
7503     return nbytes;
7504 }
7505
7506 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7507                    struct file_sparse *sparse)
7508 {
7509     struct ksmbd_file *fp;
7510     struct user_namespace *user_ns;
7511     int ret = 0;
7512     __le32 old_fattr;
7513
7514     fp = ksmbd_lookup_fd_fast(work, id);
7515     if (!fp)
7516         return -ENOENT;
7517     user_ns = file_mnt_user_ns(fp->filp);
7518
7519     old_fattr = fp->f_ci->m_fattr;
7520     if (sparse->SetSparse)
7521         fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7522     else
7523         fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7524
7525     if (fp->f_ci->m_fattr != old_fattr &&
7526         test_share_config_flag(work->tcon->share_conf,
7527                    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7528         struct xattr_dos_attrib da;
7529
7530         ret = ksmbd_vfs_get_dos_attrib_xattr(user_ns,
7531                              fp->filp->f_path.dentry, &da);
7532         if (ret <= 0)
7533             goto out;
7534
7535         da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7536         ret = ksmbd_vfs_set_dos_attrib_xattr(user_ns,
7537                              fp->filp->f_path.dentry, &da);
7538         if (ret)
7539             fp->f_ci->m_fattr = old_fattr;
7540     }
7541
7542 out:
7543     ksmbd_fd_put(work, fp);
7544     return ret;
7545 }
7546
7547 static int fsctl_request_resume_key(struct ksmbd_work *work,
7548                     struct smb2_ioctl_req *req,
7549                     struct resume_key_ioctl_rsp *key_rsp)
7550 {
7551     struct ksmbd_file *fp;
7552
7553     fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7554     if (!fp)
7555         return -ENOENT;
7556
7557     memset(key_rsp, 0, sizeof(*key_rsp));
7558     key_rsp->ResumeKey[0] = req->VolatileFileId;
7559     key_rsp->ResumeKey[1] = req->PersistentFileId;
7560     ksmbd_fd_put(work, fp);
7561
7562     return 0;
7563 }
7564
7565 /**
7566  * smb2_ioctl() - handler for smb2 ioctl command
7567  * @work:   smb work containing ioctl command buffer
7568  *
7569  * Return:  0 on success, otherwise error
7570  */
7571 int smb2_ioctl(struct ksmbd_work *work)
7572 {
7573     struct smb2_ioctl_req *req;
7574     struct smb2_ioctl_rsp *rsp;
7575     unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7576     u64 id = KSMBD_NO_FID;
7577     struct ksmbd_conn *conn = work->conn;
7578     int ret = 0;
7579
7580     if (work->next_smb2_rcv_hdr_off) {
7581         req = ksmbd_req_buf_next(work);
7582         rsp = ksmbd_resp_buf_next(work);
7583         if (!has_file_id(req->VolatileFileId)) {
7584             ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7585                     work->compound_fid);
7586             id = work->compound_fid;
7587         }
7588     } else {
7589         req = smb2_get_msg(work->request_buf);
7590         rsp = smb2_get_msg(work->response_buf);
7591     }
7592
7593     if (!has_file_id(id))
7594         id = req->VolatileFileId;
7595
7596     if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7597         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7598         goto out;
7599     }
7600
7601     cnt_code = le32_to_cpu(req->CtlCode);
7602     ret = smb2_calc_max_out_buf_len(work, 48,
7603                     le32_to_cpu(req->MaxOutputResponse));
7604     if (ret < 0) {
7605         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7606         goto out;
7607     }
7608     out_buf_len = (unsigned int)ret;
7609     in_buf_len = le32_to_cpu(req->InputCount);
7610
7611     switch (cnt_code) {
7612     case FSCTL_DFS_GET_REFERRALS:
7613     case FSCTL_DFS_GET_REFERRALS_EX:
7614         /* Not support DFS yet */
7615         rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
7616         goto out;
7617     case FSCTL_CREATE_OR_GET_OBJECT_ID:
7618     {
7619         struct file_object_buf_type1_ioctl_rsp *obj_buf;
7620
7621         nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
7622         obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
7623             &rsp->Buffer[0];
7624
7625         /*
7626          * TODO: This is dummy implementation to pass smbtorture
7627          * Need to check correct response later
7628          */
7629         memset(obj_buf->ObjectId, 0x0, 16);
7630         memset(obj_buf->BirthVolumeId, 0x0, 16);
7631         memset(obj_buf->BirthObjectId, 0x0, 16);
7632         memset(obj_buf->DomainId, 0x0, 16);
7633
7634         break;
7635     }
7636     case FSCTL_PIPE_TRANSCEIVE:
7637         out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
7638         nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
7639         break;
7640     case FSCTL_VALIDATE_NEGOTIATE_INFO:
7641         if (conn->dialect < SMB30_PROT_ID) {
7642             ret = -EOPNOTSUPP;
7643             goto out;
7644         }
7645
7646         if (in_buf_len < sizeof(struct validate_negotiate_info_req))
7647             return -EINVAL;
7648
7649         if (out_buf_len < sizeof(struct validate_negotiate_info_rsp))
7650             return -EINVAL;
7651
7652         ret = fsctl_validate_negotiate_info(conn,
7653             (struct validate_negotiate_info_req *)&req->Buffer[0],
7654             (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
7655             in_buf_len);
7656         if (ret < 0)
7657             goto out;
7658
7659         nbytes = sizeof(struct validate_negotiate_info_rsp);
7660         rsp->PersistentFileId = SMB2_NO_FID;
7661         rsp->VolatileFileId = SMB2_NO_FID;
7662         break;
7663     case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
7664         ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
7665         if (ret < 0)
7666             goto out;
7667         nbytes = ret;
7668         break;
7669     case FSCTL_REQUEST_RESUME_KEY:
7670         if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
7671             ret = -EINVAL;
7672             goto out;
7673         }
7674
7675         ret = fsctl_request_resume_key(work, req,
7676                            (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
7677         if (ret < 0)
7678             goto out;
7679         rsp->PersistentFileId = req->PersistentFileId;
7680         rsp->VolatileFileId = req->VolatileFileId;
7681         nbytes = sizeof(struct resume_key_ioctl_rsp);
7682         break;
7683     case FSCTL_COPYCHUNK:
7684     case FSCTL_COPYCHUNK_WRITE:
7685         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7686             ksmbd_debug(SMB,
7687                     "User does not have write permission\n");
7688             ret = -EACCES;
7689             goto out;
7690         }
7691
7692         if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
7693             ret = -EINVAL;
7694             goto out;
7695         }
7696
7697         if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
7698             ret = -EINVAL;
7699             goto out;
7700         }
7701
7702         nbytes = sizeof(struct copychunk_ioctl_rsp);
7703         rsp->VolatileFileId = req->VolatileFileId;
7704         rsp->PersistentFileId = req->PersistentFileId;
7705         fsctl_copychunk(work,
7706                 (struct copychunk_ioctl_req *)&req->Buffer[0],
7707                 le32_to_cpu(req->CtlCode),
7708                 le32_to_cpu(req->InputCount),
7709                 req->VolatileFileId,
7710                 req->PersistentFileId,
7711                 rsp);
7712         break;
7713     case FSCTL_SET_SPARSE:
7714         if (in_buf_len < sizeof(struct file_sparse)) {
7715             ret = -EINVAL;
7716             goto out;
7717         }
7718
7719         ret = fsctl_set_sparse(work, id,
7720                        (struct file_sparse *)&req->Buffer[0]);
7721         if (ret < 0)
7722             goto out;
7723         break;
7724     case FSCTL_SET_ZERO_DATA:
7725     {
7726         struct file_zero_data_information *zero_data;
7727         struct ksmbd_file *fp;
7728         loff_t off, len, bfz;
7729
7730         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7731             ksmbd_debug(SMB,
7732                     "User does not have write permission\n");
7733             ret = -EACCES;
7734             goto out;
7735         }
7736
7737         if (in_buf_len < sizeof(struct file_zero_data_information)) {
7738             ret = -EINVAL;
7739             goto out;
7740         }
7741
7742         zero_data =
7743             (struct file_zero_data_information *)&req->Buffer[0];
7744
7745         off = le64_to_cpu(zero_data->FileOffset);
7746         bfz = le64_to_cpu(zero_data->BeyondFinalZero);
7747         if (off > bfz) {
7748             ret = -EINVAL;
7749             goto out;
7750         }
7751
7752         len = bfz - off;
7753         if (len) {
7754             fp = ksmbd_lookup_fd_fast(work, id);
7755             if (!fp) {
7756                 ret = -ENOENT;
7757                 goto out;
7758             }
7759
7760             ret = ksmbd_vfs_zero_data(work, fp, off, len);
7761             ksmbd_fd_put(work, fp);
7762             if (ret < 0)
7763                 goto out;
7764         }
7765         break;
7766     }
7767     case FSCTL_QUERY_ALLOCATED_RANGES:
7768         if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
7769             ret = -EINVAL;
7770             goto out;
7771         }
7772
7773         ret = fsctl_query_allocated_ranges(work, id,
7774             (struct file_allocated_range_buffer *)&req->Buffer[0],
7775             (struct file_allocated_range_buffer *)&rsp->Buffer[0],
7776             out_buf_len /
7777             sizeof(struct file_allocated_range_buffer), &nbytes);
7778         if (ret == -E2BIG) {
7779             rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7780         } else if (ret < 0) {
7781             nbytes = 0;
7782             goto out;
7783         }
7784
7785         nbytes *= sizeof(struct file_allocated_range_buffer);
7786         break;
7787     case FSCTL_GET_REPARSE_POINT:
7788     {
7789         struct reparse_data_buffer *reparse_ptr;
7790         struct ksmbd_file *fp;
7791
7792         reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
7793         fp = ksmbd_lookup_fd_fast(work, id);
7794         if (!fp) {
7795             pr_err("not found fp!!\n");
7796             ret = -ENOENT;
7797             goto out;
7798         }
7799
7800         reparse_ptr->ReparseTag =
7801             smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
7802         reparse_ptr->ReparseDataLength = 0;
7803         ksmbd_fd_put(work, fp);
7804         nbytes = sizeof(struct reparse_data_buffer);
7805         break;
7806     }
7807     case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
7808     {
7809         struct ksmbd_file *fp_in, *fp_out = NULL;
7810         struct duplicate_extents_to_file *dup_ext;
7811         loff_t src_off, dst_off, length, cloned;
7812
7813         if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
7814             ret = -EINVAL;
7815             goto out;
7816         }
7817
7818         dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
7819
7820         fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
7821                          dup_ext->PersistentFileHandle);
7822         if (!fp_in) {
7823             pr_err("not found file handle in duplicate extent to file\n");
7824             ret = -ENOENT;
7825             goto out;
7826         }
7827
7828         fp_out = ksmbd_lookup_fd_fast(work, id);
7829         if (!fp_out) {
7830             pr_err("not found fp\n");
7831             ret = -ENOENT;
7832             goto dup_ext_out;
7833         }
7834
7835         src_off = le64_to_cpu(dup_ext->SourceFileOffset);
7836         dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
7837         length = le64_to_cpu(dup_ext->ByteCount);
7838         /*
7839          * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
7840          * should fall back to vfs_copy_file_range().  This could be
7841          * beneficial when re-exporting nfs/smb mount, but note that
7842          * this can result in partial copy that returns an error status.
7843          * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
7844          * fall back to vfs_copy_file_range(), should be avoided when
7845          * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
7846          */
7847         cloned = vfs_clone_file_range(fp_in->filp, src_off,
7848                           fp_out->filp, dst_off, length, 0);
7849         if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
7850             ret = -EOPNOTSUPP;
7851             goto dup_ext_out;
7852         } else if (cloned != length) {
7853             cloned = vfs_copy_file_range(fp_in->filp, src_off,
7854                              fp_out->filp, dst_off,
7855                              length, 0);
7856             if (cloned != length) {
7857                 if (cloned < 0)
7858                     ret = cloned;
7859                 else
7860                     ret = -EINVAL;
7861             }
7862         }
7863
7864 dup_ext_out:
7865         ksmbd_fd_put(work, fp_in);
7866         ksmbd_fd_put(work, fp_out);
7867         if (ret < 0)
7868             goto out;
7869         break;
7870     }
7871     default:
7872         ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
7873                 cnt_code);
7874         ret = -EOPNOTSUPP;
7875         goto out;
7876     }
7877
7878     rsp->CtlCode = cpu_to_le32(cnt_code);
7879     rsp->InputCount = cpu_to_le32(0);
7880     rsp->InputOffset = cpu_to_le32(112);
7881     rsp->OutputOffset = cpu_to_le32(112);
7882     rsp->OutputCount = cpu_to_le32(nbytes);
7883     rsp->StructureSize = cpu_to_le16(49);
7884     rsp->Reserved = cpu_to_le16(0);
7885     rsp->Flags = cpu_to_le32(0);
7886     rsp->Reserved2 = cpu_to_le32(0);
7887     inc_rfc1001_len(work->response_buf, 48 + nbytes);
7888
7889     return 0;
7890
7891 out:
7892     if (ret == -EACCES)
7893         rsp->hdr.Status = STATUS_ACCESS_DENIED;
7894     else if (ret == -ENOENT)
7895         rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7896     else if (ret == -EOPNOTSUPP)
7897         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7898     else if (ret == -ENOSPC)
7899         rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
7900     else if (ret < 0 || rsp->hdr.Status == 0)
7901         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7902     smb2_set_err_rsp(work);
7903     return 0;
7904 }
7905
7906 /**
7907  * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
7908  * @work:   smb work containing oplock break command buffer
7909  *
7910  * Return:  0
7911  */
7912 static void smb20_oplock_break_ack(struct ksmbd_work *work)
7913 {
7914     struct smb2_oplock_break *req = smb2_get_msg(work->request_buf);
7915     struct smb2_oplock_break *rsp = smb2_get_msg(work->response_buf);
7916     struct ksmbd_file *fp;
7917     struct oplock_info *opinfo = NULL;
7918     __le32 err = 0;
7919     int ret = 0;
7920     u64 volatile_id, persistent_id;
7921     char req_oplevel = 0, rsp_oplevel = 0;
7922     unsigned int oplock_change_type;
7923
7924     volatile_id = req->VolatileFid;
7925     persistent_id = req->PersistentFid;
7926     req_oplevel = req->OplockLevel;
7927     ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
7928             volatile_id, persistent_id, req_oplevel);
7929
7930     fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7931     if (!fp) {
7932         rsp->hdr.Status = STATUS_FILE_CLOSED;
7933         smb2_set_err_rsp(work);
7934         return;
7935     }
7936
7937     opinfo = opinfo_get(fp);
7938     if (!opinfo) {
7939         pr_err("unexpected null oplock_info\n");
7940         rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
7941         smb2_set_err_rsp(work);
7942         ksmbd_fd_put(work, fp);
7943         return;
7944     }
7945
7946     if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
7947         rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
7948         goto err_out;
7949     }
7950
7951     if (opinfo->op_state == OPLOCK_STATE_NONE) {
7952         ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
7953         rsp->hdr.Status = STATUS_UNSUCCESSFUL;
7954         goto err_out;
7955     }
7956
7957     if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7958          opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7959         (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
7960          req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
7961         err = STATUS_INVALID_OPLOCK_PROTOCOL;
7962         oplock_change_type = OPLOCK_WRITE_TO_NONE;
7963     } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
7964            req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
7965         err = STATUS_INVALID_OPLOCK_PROTOCOL;
7966         oplock_change_type = OPLOCK_READ_TO_NONE;
7967     } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
7968            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7969         err = STATUS_INVALID_DEVICE_STATE;
7970         if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7971              opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7972             req_oplevel == SMB2_OPLOCK_LEVEL_II) {
7973             oplock_change_type = OPLOCK_WRITE_TO_READ;
7974         } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7975                 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7976                req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7977             oplock_change_type = OPLOCK_WRITE_TO_NONE;
7978         } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
7979                req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7980             oplock_change_type = OPLOCK_READ_TO_NONE;
7981         } else {
7982             oplock_change_type = 0;
7983         }
7984     } else {
7985         oplock_change_type = 0;
7986     }
7987
7988     switch (oplock_change_type) {
7989     case OPLOCK_WRITE_TO_READ:
7990         ret = opinfo_write_to_read(opinfo);
7991         rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
7992         break;
7993     case OPLOCK_WRITE_TO_NONE:
7994         ret = opinfo_write_to_none(opinfo);
7995         rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
7996         break;
7997     case OPLOCK_READ_TO_NONE:
7998         ret = opinfo_read_to_none(opinfo);
7999         rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8000         break;
8001     default:
8002         pr_err("unknown oplock change 0x%x -> 0x%x\n",
8003                opinfo->level, rsp_oplevel);
8004     }
8005
8006     if (ret < 0) {
8007         rsp->hdr.Status = err;
8008         goto err_out;
8009     }
8010
8011     opinfo_put(opinfo);
8012     ksmbd_fd_put(work, fp);
8013     opinfo->op_state = OPLOCK_STATE_NONE;
8014     wake_up_interruptible_all(&opinfo->oplock_q);
8015
8016     rsp->StructureSize = cpu_to_le16(24);
8017     rsp->OplockLevel = rsp_oplevel;
8018     rsp->Reserved = 0;
8019     rsp->Reserved2 = 0;
8020     rsp->VolatileFid = volatile_id;
8021     rsp->PersistentFid = persistent_id;
8022     inc_rfc1001_len(work->response_buf, 24);
8023     return;
8024
8025 err_out:
8026     opinfo->op_state = OPLOCK_STATE_NONE;
8027     wake_up_interruptible_all(&opinfo->oplock_q);
8028
8029     opinfo_put(opinfo);
8030     ksmbd_fd_put(work, fp);
8031     smb2_set_err_rsp(work);
8032 }
8033
8034 static int check_lease_state(struct lease *lease, __le32 req_state)
8035 {
8036     if ((lease->new_state ==
8037          (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8038         !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8039         lease->new_state = req_state;
8040         return 0;
8041     }
8042
8043     if (lease->new_state == req_state)
8044         return 0;
8045
8046     return 1;
8047 }
8048
8049 /**
8050  * smb21_lease_break_ack() - handler for smb2.1 lease break command
8051  * @work:   smb work containing lease break command buffer
8052  *
8053  * Return:  0
8054  */
8055 static void smb21_lease_break_ack(struct ksmbd_work *work)
8056 {
8057     struct ksmbd_conn *conn = work->conn;
8058     struct smb2_lease_ack *req = smb2_get_msg(work->request_buf);
8059     struct smb2_lease_ack *rsp = smb2_get_msg(work->response_buf);
8060     struct oplock_info *opinfo;
8061     __le32 err = 0;
8062     int ret = 0;
8063     unsigned int lease_change_type;
8064     __le32 lease_state;
8065     struct lease *lease;
8066
8067     ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8068             le32_to_cpu(req->LeaseState));
8069     opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8070     if (!opinfo) {
8071         ksmbd_debug(OPLOCK, "file not opened\n");
8072         smb2_set_err_rsp(work);
8073         rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8074         return;
8075     }
8076     lease = opinfo->o_lease;
8077
8078     if (opinfo->op_state == OPLOCK_STATE_NONE) {
8079         pr_err("unexpected lease break state 0x%x\n",
8080                opinfo->op_state);
8081         rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8082         goto err_out;
8083     }
8084
8085     if (check_lease_state(lease, req->LeaseState)) {
8086         rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8087         ksmbd_debug(OPLOCK,
8088                 "req lease state: 0x%x, expected state: 0x%x\n",
8089                 req->LeaseState, lease->new_state);
8090         goto err_out;
8091     }
8092
8093     if (!atomic_read(&opinfo->breaking_cnt)) {
8094         rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8095         goto err_out;
8096     }
8097
8098     /* check for bad lease state */
8099     if (req->LeaseState &
8100         (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8101         err = STATUS_INVALID_OPLOCK_PROTOCOL;
8102         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8103             lease_change_type = OPLOCK_WRITE_TO_NONE;
8104         else
8105             lease_change_type = OPLOCK_READ_TO_NONE;
8106         ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8107                 le32_to_cpu(lease->state),
8108                 le32_to_cpu(req->LeaseState));
8109     } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8110            req->LeaseState != SMB2_LEASE_NONE_LE) {
8111         err = STATUS_INVALID_OPLOCK_PROTOCOL;
8112         lease_change_type = OPLOCK_READ_TO_NONE;
8113         ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8114                 le32_to_cpu(lease->state),
8115                 le32_to_cpu(req->LeaseState));
8116     } else {
8117         /* valid lease state changes */
8118         err = STATUS_INVALID_DEVICE_STATE;
8119         if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8120             if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8121                 lease_change_type = OPLOCK_WRITE_TO_NONE;
8122             else
8123                 lease_change_type = OPLOCK_READ_TO_NONE;
8124         } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8125             if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8126                 lease_change_type = OPLOCK_WRITE_TO_READ;
8127             else
8128                 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8129         } else {
8130             lease_change_type = 0;
8131         }
8132     }
8133
8134     switch (lease_change_type) {
8135     case OPLOCK_WRITE_TO_READ:
8136         ret = opinfo_write_to_read(opinfo);
8137         break;
8138     case OPLOCK_READ_HANDLE_TO_READ:
8139         ret = opinfo_read_handle_to_read(opinfo);
8140         break;
8141     case OPLOCK_WRITE_TO_NONE:
8142         ret = opinfo_write_to_none(opinfo);
8143         break;
8144     case OPLOCK_READ_TO_NONE:
8145         ret = opinfo_read_to_none(opinfo);
8146         break;
8147     default:
8148         ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8149                 le32_to_cpu(lease->state),
8150                 le32_to_cpu(req->LeaseState));
8151     }
8152
8153     lease_state = lease->state;
8154     opinfo->op_state = OPLOCK_STATE_NONE;
8155     wake_up_interruptible_all(&opinfo->oplock_q);
8156     atomic_dec(&opinfo->breaking_cnt);
8157     wake_up_interruptible_all(&opinfo->oplock_brk);
8158     opinfo_put(opinfo);
8159
8160     if (ret < 0) {
8161         rsp->hdr.Status = err;
8162         goto err_out;
8163     }
8164
8165     rsp->StructureSize = cpu_to_le16(36);
8166     rsp->Reserved = 0;
8167     rsp->Flags = 0;
8168     memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8169     rsp->LeaseState = lease_state;
8170     rsp->LeaseDuration = 0;
8171     inc_rfc1001_len(work->response_buf, 36);
8172     return;
8173
8174 err_out:
8175     opinfo->op_state = OPLOCK_STATE_NONE;
8176     wake_up_interruptible_all(&opinfo->oplock_q);
8177     atomic_dec(&opinfo->breaking_cnt);
8178     wake_up_interruptible_all(&opinfo->oplock_brk);
8179
8180     opinfo_put(opinfo);
8181     smb2_set_err_rsp(work);
8182 }
8183
8184 /**
8185  * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8186  * @work:   smb work containing oplock/lease break command buffer
8187  *
8188  * Return:  0
8189  */
8190 int smb2_oplock_break(struct ksmbd_work *work)
8191 {
8192     struct smb2_oplock_break *req = smb2_get_msg(work->request_buf);
8193     struct smb2_oplock_break *rsp = smb2_get_msg(work->response_buf);
8194
8195     switch (le16_to_cpu(req->StructureSize)) {
8196     case OP_BREAK_STRUCT_SIZE_20:
8197         smb20_oplock_break_ack(work);
8198         break;
8199     case OP_BREAK_STRUCT_SIZE_21:
8200         smb21_lease_break_ack(work);
8201         break;
8202     default:
8203         ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8204                 le16_to_cpu(req->StructureSize));
8205         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8206         smb2_set_err_rsp(work);
8207     }
8208
8209     return 0;
8210 }
8211
8212 /**
8213  * smb2_notify() - handler for smb2 notify request
8214  * @work:   smb work containing notify command buffer
8215  *
8216  * Return:      0
8217  */
8218 int smb2_notify(struct ksmbd_work *work)
8219 {
8220     struct smb2_change_notify_req *req;
8221     struct smb2_change_notify_rsp *rsp;
8222
8223     WORK_BUFFERS(work, req, rsp);
8224
8225     if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8226         rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8227         smb2_set_err_rsp(work);
8228         return 0;
8229     }
8230
8231     smb2_set_err_rsp(work);
8232     rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8233     return 0;
8234 }
8235
8236 /**
8237  * smb2_is_sign_req() - handler for checking packet signing status
8238  * @work:   smb work containing notify command buffer
8239  * @command:    SMB2 command id
8240  *
8241  * Return:  true if packed is signed, false otherwise
8242  */
8243 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8244 {
8245     struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8246
8247     if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8248         command != SMB2_NEGOTIATE_HE &&
8249         command != SMB2_SESSION_SETUP_HE &&
8250         command != SMB2_OPLOCK_BREAK_HE)
8251         return true;
8252
8253     return false;
8254 }
8255
8256 /**
8257  * smb2_check_sign_req() - handler for req packet sign processing
8258  * @work:   smb work containing notify command buffer
8259  *
8260  * Return:  1 on success, 0 otherwise
8261  */
8262 int smb2_check_sign_req(struct ksmbd_work *work)
8263 {
8264     struct smb2_hdr *hdr;
8265     char signature_req[SMB2_SIGNATURE_SIZE];
8266     char signature[SMB2_HMACSHA256_SIZE];
8267     struct kvec iov[1];
8268     size_t len;
8269
8270     hdr = smb2_get_msg(work->request_buf);
8271     if (work->next_smb2_rcv_hdr_off)
8272         hdr = ksmbd_req_buf_next(work);
8273
8274     if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8275         len = get_rfc1002_len(work->request_buf);
8276     else if (hdr->NextCommand)
8277         len = le32_to_cpu(hdr->NextCommand);
8278     else
8279         len = get_rfc1002_len(work->request_buf) -
8280             work->next_smb2_rcv_hdr_off;
8281
8282     memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8283     memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8284
8285     iov[0].iov_base = (char *)&hdr->ProtocolId;
8286     iov[0].iov_len = len;
8287
8288     if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8289                 signature))
8290         return 0;
8291
8292     if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8293         pr_err("bad smb2 signature\n");
8294         return 0;
8295     }
8296
8297     return 1;
8298 }
8299
8300 /**
8301  * smb2_set_sign_rsp() - handler for rsp packet sign processing
8302  * @work:   smb work containing notify command buffer
8303  *
8304  */
8305 void smb2_set_sign_rsp(struct ksmbd_work *work)
8306 {
8307     struct smb2_hdr *hdr;
8308     struct smb2_hdr *req_hdr;
8309     char signature[SMB2_HMACSHA256_SIZE];
8310     struct kvec iov[2];
8311     size_t len;
8312     int n_vec = 1;
8313
8314     hdr = smb2_get_msg(work->response_buf);
8315     if (work->next_smb2_rsp_hdr_off)
8316         hdr = ksmbd_resp_buf_next(work);
8317
8318     req_hdr = ksmbd_req_buf_next(work);
8319
8320     if (!work->next_smb2_rsp_hdr_off) {
8321         len = get_rfc1002_len(work->response_buf);
8322         if (req_hdr->NextCommand)
8323             len = ALIGN(len, 8);
8324     } else {
8325         len = get_rfc1002_len(work->response_buf) -
8326             work->next_smb2_rsp_hdr_off;
8327         len = ALIGN(len, 8);
8328     }
8329
8330     if (req_hdr->NextCommand)
8331         hdr->NextCommand = cpu_to_le32(len);
8332
8333     hdr->Flags |= SMB2_FLAGS_SIGNED;
8334     memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8335
8336     iov[0].iov_base = (char *)&hdr->ProtocolId;
8337     iov[0].iov_len = len;
8338
8339     if (work->aux_payload_sz) {
8340         iov[0].iov_len -= work->aux_payload_sz;
8341
8342         iov[1].iov_base = work->aux_payload_buf;
8343         iov[1].iov_len = work->aux_payload_sz;
8344         n_vec++;
8345     }
8346
8347     if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8348                  signature))
8349         memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8350 }
8351
8352 /**
8353  * smb3_check_sign_req() - handler for req packet sign processing
8354  * @work:   smb work containing notify command buffer
8355  *
8356  * Return:  1 on success, 0 otherwise
8357  */
8358 int smb3_check_sign_req(struct ksmbd_work *work)
8359 {
8360     struct ksmbd_conn *conn = work->conn;
8361     char *signing_key;
8362     struct smb2_hdr *hdr;
8363     struct channel *chann;
8364     char signature_req[SMB2_SIGNATURE_SIZE];
8365     char signature[SMB2_CMACAES_SIZE];
8366     struct kvec iov[1];
8367     size_t len;
8368
8369     hdr = smb2_get_msg(work->request_buf);
8370     if (work->next_smb2_rcv_hdr_off)
8371         hdr = ksmbd_req_buf_next(work);
8372
8373     if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8374         len = get_rfc1002_len(work->request_buf);
8375     else if (hdr->NextCommand)
8376         len = le32_to_cpu(hdr->NextCommand);
8377     else
8378         len = get_rfc1002_len(work->request_buf) -
8379             work->next_smb2_rcv_hdr_off;
8380
8381     if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8382         signing_key = work->sess->smb3signingkey;
8383     } else {
8384         read_lock(&work->sess->chann_lock);
8385         chann = lookup_chann_list(work->sess, conn);
8386         if (!chann) {
8387             read_unlock(&work->sess->chann_lock);
8388             return 0;
8389         }
8390         signing_key = chann->smb3signingkey;
8391         read_unlock(&work->sess->chann_lock);
8392     }
8393
8394     if (!signing_key) {
8395         pr_err("SMB3 signing key is not generated\n");
8396         return 0;
8397     }
8398
8399     memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8400     memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8401     iov[0].iov_base = (char *)&hdr->ProtocolId;
8402     iov[0].iov_len = len;
8403
8404     if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8405         return 0;
8406
8407     if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8408         pr_err("bad smb2 signature\n");
8409         return 0;
8410     }
8411
8412     return 1;
8413 }
8414
8415 /**
8416  * smb3_set_sign_rsp() - handler for rsp packet sign processing
8417  * @work:   smb work containing notify command buffer
8418  *
8419  */
8420 void smb3_set_sign_rsp(struct ksmbd_work *work)
8421 {
8422     struct ksmbd_conn *conn = work->conn;
8423     struct smb2_hdr *req_hdr, *hdr;
8424     struct channel *chann;
8425     char signature[SMB2_CMACAES_SIZE];
8426     struct kvec iov[2];
8427     int n_vec = 1;
8428     size_t len;
8429     char *signing_key;
8430
8431     hdr = smb2_get_msg(work->response_buf);
8432     if (work->next_smb2_rsp_hdr_off)
8433         hdr = ksmbd_resp_buf_next(work);
8434
8435     req_hdr = ksmbd_req_buf_next(work);
8436
8437     if (!work->next_smb2_rsp_hdr_off) {
8438         len = get_rfc1002_len(work->response_buf);
8439         if (req_hdr->NextCommand)
8440             len = ALIGN(len, 8);
8441     } else {
8442         len = get_rfc1002_len(work->response_buf) -
8443             work->next_smb2_rsp_hdr_off;
8444         len = ALIGN(len, 8);
8445     }
8446
8447     if (conn->binding == false &&
8448         le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8449         signing_key = work->sess->smb3signingkey;
8450     } else {
8451         read_lock(&work->sess->chann_lock);
8452         chann = lookup_chann_list(work->sess, work->conn);
8453         if (!chann) {
8454             read_unlock(&work->sess->chann_lock);
8455             return;
8456         }
8457         signing_key = chann->smb3signingkey;
8458         read_unlock(&work->sess->chann_lock);
8459     }
8460
8461     if (!signing_key)
8462         return;
8463
8464     if (req_hdr->NextCommand)
8465         hdr->NextCommand = cpu_to_le32(len);
8466
8467     hdr->Flags |= SMB2_FLAGS_SIGNED;
8468     memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8469     iov[0].iov_base = (char *)&hdr->ProtocolId;
8470     iov[0].iov_len = len;
8471     if (work->aux_payload_sz) {
8472         iov[0].iov_len -= work->aux_payload_sz;
8473         iov[1].iov_base = work->aux_payload_buf;
8474         iov[1].iov_len = work->aux_payload_sz;
8475         n_vec++;
8476     }
8477
8478     if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, signature))
8479         memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8480 }
8481
8482 /**
8483  * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8484  * @work:   smb work containing response buffer
8485  *
8486  */
8487 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8488 {
8489     struct ksmbd_conn *conn = work->conn;
8490     struct ksmbd_session *sess = work->sess;
8491     struct smb2_hdr *req, *rsp;
8492
8493     if (conn->dialect != SMB311_PROT_ID)
8494         return;
8495
8496     WORK_BUFFERS(work, req, rsp);
8497
8498     if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8499         conn->preauth_info)
8500         ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8501                          conn->preauth_info->Preauth_HashValue);
8502
8503     if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8504         __u8 *hash_value;
8505
8506         if (conn->binding) {
8507             struct preauth_session *preauth_sess;
8508
8509             preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8510             if (!preauth_sess)
8511                 return;
8512             hash_value = preauth_sess->Preauth_HashValue;
8513         } else {
8514             hash_value = sess->Preauth_HashValue;
8515             if (!hash_value)
8516                 return;
8517         }
8518         ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8519                          hash_value);
8520     }
8521 }
8522
8523 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8524 {
8525     struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8526     struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8527     unsigned int orig_len = get_rfc1002_len(old_buf);
8528
8529     /* tr_buf must be cleared by the caller */
8530     tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8531     tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8532     tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8533     if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8534         cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8535         get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8536     else
8537         get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8538     memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8539     inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8540     inc_rfc1001_len(tr_buf, orig_len);
8541 }
8542
8543 int smb3_encrypt_resp(struct ksmbd_work *work)
8544 {
8545     char *buf = work->response_buf;
8546     struct kvec iov[3];
8547     int rc = -ENOMEM;
8548     int buf_size = 0, rq_nvec = 2 + (work->aux_payload_sz ? 1 : 0);
8549
8550     if (ARRAY_SIZE(iov) < rq_nvec)
8551         return -ENOMEM;
8552
8553     work->tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
8554     if (!work->tr_buf)
8555         return rc;
8556
8557     /* fill transform header */
8558     fill_transform_hdr(work->tr_buf, buf, work->conn->cipher_type);
8559
8560     iov[0].iov_base = work->tr_buf;
8561     iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8562     buf_size += iov[0].iov_len - 4;
8563
8564     iov[1].iov_base = buf + 4;
8565     iov[1].iov_len = get_rfc1002_len(buf);
8566     if (work->aux_payload_sz) {
8567         iov[1].iov_len = work->resp_hdr_sz - 4;
8568
8569         iov[2].iov_base = work->aux_payload_buf;
8570         iov[2].iov_len = work->aux_payload_sz;
8571         buf_size += iov[2].iov_len;
8572     }
8573     buf_size += iov[1].iov_len;
8574     work->resp_hdr_sz = iov[1].iov_len;
8575
8576     rc = ksmbd_crypt_message(work->conn, iov, rq_nvec, 1);
8577     if (rc)
8578         return rc;
8579
8580     memmove(buf, iov[1].iov_base, iov[1].iov_len);
8581     *(__be32 *)work->tr_buf = cpu_to_be32(buf_size);
8582
8583     return rc;
8584 }
8585
8586 bool smb3_is_transform_hdr(void *buf)
8587 {
8588     struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8589
8590     return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8591 }
8592
8593 int smb3_decrypt_req(struct ksmbd_work *work)
8594 {
8595     struct ksmbd_conn *conn = work->conn;
8596     struct ksmbd_session *sess;
8597     char *buf = work->request_buf;
8598     unsigned int pdu_length = get_rfc1002_len(buf);
8599     struct kvec iov[2];
8600     int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8601     struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8602     int rc = 0;
8603
8604     if (buf_data_size < sizeof(struct smb2_hdr)) {
8605         pr_err("Transform message is too small (%u)\n",
8606                pdu_length);
8607         return -ECONNABORTED;
8608     }
8609
8610     if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8611         pr_err("Transform message is broken\n");
8612         return -ECONNABORTED;
8613     }
8614
8615     sess = ksmbd_session_lookup_all(conn, le64_to_cpu(tr_hdr->SessionId));
8616     if (!sess) {
8617         pr_err("invalid session id(%llx) in transform header\n",
8618                le64_to_cpu(tr_hdr->SessionId));
8619         return -ECONNABORTED;
8620     }
8621
8622     iov[0].iov_base = buf;
8623     iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8624     iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8625     iov[1].iov_len = buf_data_size;
8626     rc = ksmbd_crypt_message(conn, iov, 2, 0);
8627     if (rc)
8628         return rc;
8629
8630     memmove(buf + 4, iov[1].iov_base, buf_data_size);
8631     *(__be32 *)buf = cpu_to_be32(buf_data_size);
8632
8633     return rc;
8634 }
8635
8636 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8637 {
8638     struct ksmbd_conn *conn = work->conn;
8639     struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
8640
8641     if (conn->dialect < SMB30_PROT_ID)
8642         return false;
8643
8644     if (work->next_smb2_rcv_hdr_off)
8645         rsp = ksmbd_resp_buf_next(work);
8646
8647     if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8648         rsp->Status == STATUS_SUCCESS)
8649         return true;
8650     return false;
8651 }