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0007 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
0008
0009 #include <linux/module.h>
0010 #include <linux/kmod.h>
0011 #include <linux/net.h> /* struct socket, struct proto_ops */
0012 #include <linux/atm.h> /* ATM stuff */
0013 #include <linux/atmdev.h>
0014 #include <linux/atmclip.h> /* CLIP_*ENCAP */
0015 #include <linux/atmarp.h> /* manifest constants */
0016 #include <linux/capability.h>
0017 #include <linux/sonet.h> /* for ioctls */
0018 #include <linux/atmsvc.h>
0019 #include <linux/atmmpc.h>
0020 #include <net/atmclip.h>
0021 #include <linux/atmlec.h>
0022 #include <linux/mutex.h>
0023 #include <asm/ioctls.h>
0024 #include <net/compat.h>
0025
0026 #include "resources.h"
0027 #include "signaling.h" /* for WAITING and sigd_attach */
0028 #include "common.h"
0029
0030
0031 static DEFINE_MUTEX(ioctl_mutex);
0032 static LIST_HEAD(ioctl_list);
0033
0034
0035 void register_atm_ioctl(struct atm_ioctl *ioctl)
0036 {
0037 mutex_lock(&ioctl_mutex);
0038 list_add_tail(&ioctl->list, &ioctl_list);
0039 mutex_unlock(&ioctl_mutex);
0040 }
0041 EXPORT_SYMBOL(register_atm_ioctl);
0042
0043 void deregister_atm_ioctl(struct atm_ioctl *ioctl)
0044 {
0045 mutex_lock(&ioctl_mutex);
0046 list_del(&ioctl->list);
0047 mutex_unlock(&ioctl_mutex);
0048 }
0049 EXPORT_SYMBOL(deregister_atm_ioctl);
0050
0051 static int do_vcc_ioctl(struct socket *sock, unsigned int cmd,
0052 unsigned long arg, int compat)
0053 {
0054 struct sock *sk = sock->sk;
0055 struct atm_vcc *vcc;
0056 int error;
0057 struct list_head *pos;
0058 void __user *argp = (void __user *)arg;
0059 void __user *buf;
0060 int __user *len;
0061
0062 vcc = ATM_SD(sock);
0063 switch (cmd) {
0064 case SIOCOUTQ:
0065 if (sock->state != SS_CONNECTED ||
0066 !test_bit(ATM_VF_READY, &vcc->flags)) {
0067 error = -EINVAL;
0068 goto done;
0069 }
0070 error = put_user(sk->sk_sndbuf - sk_wmem_alloc_get(sk),
0071 (int __user *)argp) ? -EFAULT : 0;
0072 goto done;
0073 case SIOCINQ:
0074 {
0075 struct sk_buff *skb;
0076
0077 if (sock->state != SS_CONNECTED) {
0078 error = -EINVAL;
0079 goto done;
0080 }
0081 skb = skb_peek(&sk->sk_receive_queue);
0082 error = put_user(skb ? skb->len : 0,
0083 (int __user *)argp) ? -EFAULT : 0;
0084 goto done;
0085 }
0086 case ATM_SETSC:
0087 net_warn_ratelimited("ATM_SETSC is obsolete; used by %s:%d\n",
0088 current->comm, task_pid_nr(current));
0089 error = 0;
0090 goto done;
0091 case ATMSIGD_CTRL:
0092 if (!capable(CAP_NET_ADMIN)) {
0093 error = -EPERM;
0094 goto done;
0095 }
0096
0097
0098
0099
0100
0101
0102
0103 if (!capable(CAP_SYS_RAWIO)) {
0104 error = -EPERM;
0105 goto done;
0106 }
0107 #ifdef CONFIG_COMPAT
0108
0109
0110
0111 if (compat) {
0112 net_warn_ratelimited("32-bit task cannot be atmsigd\n");
0113 error = -EINVAL;
0114 goto done;
0115 }
0116 #endif
0117 error = sigd_attach(vcc);
0118 if (!error)
0119 sock->state = SS_CONNECTED;
0120 goto done;
0121 case ATM_SETBACKEND:
0122 case ATM_NEWBACKENDIF:
0123 {
0124 atm_backend_t backend;
0125 error = get_user(backend, (atm_backend_t __user *)argp);
0126 if (error)
0127 goto done;
0128 switch (backend) {
0129 case ATM_BACKEND_PPP:
0130 request_module("pppoatm");
0131 break;
0132 case ATM_BACKEND_BR2684:
0133 request_module("br2684");
0134 break;
0135 }
0136 break;
0137 }
0138 case ATMMPC_CTRL:
0139 case ATMMPC_DATA:
0140 request_module("mpoa");
0141 break;
0142 case ATMARPD_CTRL:
0143 request_module("clip");
0144 break;
0145 case ATMLEC_CTRL:
0146 request_module("lec");
0147 break;
0148 }
0149
0150 error = -ENOIOCTLCMD;
0151
0152 mutex_lock(&ioctl_mutex);
0153 list_for_each(pos, &ioctl_list) {
0154 struct atm_ioctl *ic = list_entry(pos, struct atm_ioctl, list);
0155 if (try_module_get(ic->owner)) {
0156 error = ic->ioctl(sock, cmd, arg);
0157 module_put(ic->owner);
0158 if (error != -ENOIOCTLCMD)
0159 break;
0160 }
0161 }
0162 mutex_unlock(&ioctl_mutex);
0163
0164 if (error != -ENOIOCTLCMD)
0165 goto done;
0166
0167 if (cmd == ATM_GETNAMES) {
0168 if (IS_ENABLED(CONFIG_COMPAT) && compat) {
0169 #ifdef CONFIG_COMPAT
0170 struct compat_atm_iobuf __user *ciobuf = argp;
0171 compat_uptr_t cbuf;
0172 len = &ciobuf->length;
0173 if (get_user(cbuf, &ciobuf->buffer))
0174 return -EFAULT;
0175 buf = compat_ptr(cbuf);
0176 #endif
0177 } else {
0178 struct atm_iobuf __user *iobuf = argp;
0179 len = &iobuf->length;
0180 if (get_user(buf, &iobuf->buffer))
0181 return -EFAULT;
0182 }
0183 error = atm_getnames(buf, len);
0184 } else {
0185 int number;
0186
0187 if (IS_ENABLED(CONFIG_COMPAT) && compat) {
0188 #ifdef CONFIG_COMPAT
0189 struct compat_atmif_sioc __user *csioc = argp;
0190 compat_uptr_t carg;
0191
0192 len = &csioc->length;
0193 if (get_user(carg, &csioc->arg))
0194 return -EFAULT;
0195 buf = compat_ptr(carg);
0196 if (get_user(number, &csioc->number))
0197 return -EFAULT;
0198 #endif
0199 } else {
0200 struct atmif_sioc __user *sioc = argp;
0201
0202 len = &sioc->length;
0203 if (get_user(buf, &sioc->arg))
0204 return -EFAULT;
0205 if (get_user(number, &sioc->number))
0206 return -EFAULT;
0207 }
0208 error = atm_dev_ioctl(cmd, buf, len, number, compat);
0209 }
0210
0211 done:
0212 return error;
0213 }
0214
0215 int vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
0216 {
0217 return do_vcc_ioctl(sock, cmd, arg, 0);
0218 }
0219
0220 #ifdef CONFIG_COMPAT
0221
0222
0223
0224
0225
0226
0227
0228
0229
0230
0231 #define ATM_GETLINKRATE32 _IOW('a', ATMIOC_ITF+1, struct compat_atmif_sioc)
0232 #define ATM_GETNAMES32 _IOW('a', ATMIOC_ITF+3, struct compat_atm_iobuf)
0233 #define ATM_GETTYPE32 _IOW('a', ATMIOC_ITF+4, struct compat_atmif_sioc)
0234 #define ATM_GETESI32 _IOW('a', ATMIOC_ITF+5, struct compat_atmif_sioc)
0235 #define ATM_GETADDR32 _IOW('a', ATMIOC_ITF+6, struct compat_atmif_sioc)
0236 #define ATM_RSTADDR32 _IOW('a', ATMIOC_ITF+7, struct compat_atmif_sioc)
0237 #define ATM_ADDADDR32 _IOW('a', ATMIOC_ITF+8, struct compat_atmif_sioc)
0238 #define ATM_DELADDR32 _IOW('a', ATMIOC_ITF+9, struct compat_atmif_sioc)
0239 #define ATM_GETCIRANGE32 _IOW('a', ATMIOC_ITF+10, struct compat_atmif_sioc)
0240 #define ATM_SETCIRANGE32 _IOW('a', ATMIOC_ITF+11, struct compat_atmif_sioc)
0241 #define ATM_SETESI32 _IOW('a', ATMIOC_ITF+12, struct compat_atmif_sioc)
0242 #define ATM_SETESIF32 _IOW('a', ATMIOC_ITF+13, struct compat_atmif_sioc)
0243 #define ATM_GETSTAT32 _IOW('a', ATMIOC_SARCOM+0, struct compat_atmif_sioc)
0244 #define ATM_GETSTATZ32 _IOW('a', ATMIOC_SARCOM+1, struct compat_atmif_sioc)
0245 #define ATM_GETLOOP32 _IOW('a', ATMIOC_SARCOM+2, struct compat_atmif_sioc)
0246 #define ATM_SETLOOP32 _IOW('a', ATMIOC_SARCOM+3, struct compat_atmif_sioc)
0247 #define ATM_QUERYLOOP32 _IOW('a', ATMIOC_SARCOM+4, struct compat_atmif_sioc)
0248
0249 static struct {
0250 unsigned int cmd32;
0251 unsigned int cmd;
0252 } atm_ioctl_map[] = {
0253 { ATM_GETLINKRATE32, ATM_GETLINKRATE },
0254 { ATM_GETNAMES32, ATM_GETNAMES },
0255 { ATM_GETTYPE32, ATM_GETTYPE },
0256 { ATM_GETESI32, ATM_GETESI },
0257 { ATM_GETADDR32, ATM_GETADDR },
0258 { ATM_RSTADDR32, ATM_RSTADDR },
0259 { ATM_ADDADDR32, ATM_ADDADDR },
0260 { ATM_DELADDR32, ATM_DELADDR },
0261 { ATM_GETCIRANGE32, ATM_GETCIRANGE },
0262 { ATM_SETCIRANGE32, ATM_SETCIRANGE },
0263 { ATM_SETESI32, ATM_SETESI },
0264 { ATM_SETESIF32, ATM_SETESIF },
0265 { ATM_GETSTAT32, ATM_GETSTAT },
0266 { ATM_GETSTATZ32, ATM_GETSTATZ },
0267 { ATM_GETLOOP32, ATM_GETLOOP },
0268 { ATM_SETLOOP32, ATM_SETLOOP },
0269 { ATM_QUERYLOOP32, ATM_QUERYLOOP },
0270 };
0271
0272 #define NR_ATM_IOCTL ARRAY_SIZE(atm_ioctl_map)
0273
0274 static int do_atm_iobuf(struct socket *sock, unsigned int cmd,
0275 unsigned long arg)
0276 {
0277 struct compat_atm_iobuf __user *iobuf32 = compat_ptr(arg);
0278 u32 data;
0279
0280 if (get_user(data, &iobuf32->buffer))
0281 return -EFAULT;
0282
0283 return atm_getnames(&iobuf32->length, compat_ptr(data));
0284 }
0285
0286 static int do_atmif_sioc(struct socket *sock, unsigned int cmd,
0287 unsigned long arg)
0288 {
0289 struct compat_atmif_sioc __user *sioc32 = compat_ptr(arg);
0290 int number;
0291 u32 data;
0292
0293 if (get_user(data, &sioc32->arg) || get_user(number, &sioc32->number))
0294 return -EFAULT;
0295 return atm_dev_ioctl(cmd, compat_ptr(data), &sioc32->length, number, 0);
0296 }
0297
0298 static int do_atm_ioctl(struct socket *sock, unsigned int cmd32,
0299 unsigned long arg)
0300 {
0301 int i;
0302 unsigned int cmd = 0;
0303
0304 switch (cmd32) {
0305 case SONET_GETSTAT:
0306 case SONET_GETSTATZ:
0307 case SONET_GETDIAG:
0308 case SONET_SETDIAG:
0309 case SONET_CLRDIAG:
0310 case SONET_SETFRAMING:
0311 case SONET_GETFRAMING:
0312 case SONET_GETFRSENSE:
0313 return do_atmif_sioc(sock, cmd32, arg);
0314 }
0315
0316 for (i = 0; i < NR_ATM_IOCTL; i++) {
0317 if (cmd32 == atm_ioctl_map[i].cmd32) {
0318 cmd = atm_ioctl_map[i].cmd;
0319 break;
0320 }
0321 }
0322 if (i == NR_ATM_IOCTL)
0323 return -EINVAL;
0324
0325 switch (cmd) {
0326 case ATM_GETNAMES:
0327 return do_atm_iobuf(sock, cmd, arg);
0328
0329 case ATM_GETLINKRATE:
0330 case ATM_GETTYPE:
0331 case ATM_GETESI:
0332 case ATM_GETADDR:
0333 case ATM_RSTADDR:
0334 case ATM_ADDADDR:
0335 case ATM_DELADDR:
0336 case ATM_GETCIRANGE:
0337 case ATM_SETCIRANGE:
0338 case ATM_SETESI:
0339 case ATM_SETESIF:
0340 case ATM_GETSTAT:
0341 case ATM_GETSTATZ:
0342 case ATM_GETLOOP:
0343 case ATM_SETLOOP:
0344 case ATM_QUERYLOOP:
0345 return do_atmif_sioc(sock, cmd, arg);
0346 }
0347
0348 return -EINVAL;
0349 }
0350
0351 int vcc_compat_ioctl(struct socket *sock, unsigned int cmd,
0352 unsigned long arg)
0353 {
0354 int ret;
0355
0356 ret = do_vcc_ioctl(sock, cmd, arg, 1);
0357 if (ret != -ENOIOCTLCMD)
0358 return ret;
0359
0360 return do_atm_ioctl(sock, cmd, arg);
0361 }
0362 #endif
