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0001 // SPDX-License-Identifier: GPL-2.0
0002 #include <linux/ceph/ceph_debug.h>
0003 
0004 #include <linux/device.h>
0005 #include <linux/slab.h>
0006 #include <linux/module.h>
0007 #include <linux/ctype.h>
0008 #include <linux/debugfs.h>
0009 #include <linux/seq_file.h>
0010 #include <linux/math64.h>
0011 #include <linux/ktime.h>
0012 
0013 #include <linux/ceph/libceph.h>
0014 #include <linux/ceph/mon_client.h>
0015 #include <linux/ceph/auth.h>
0016 #include <linux/ceph/debugfs.h>
0017 
0018 #include "super.h"
0019 
0020 #ifdef CONFIG_DEBUG_FS
0021 
0022 #include "mds_client.h"
0023 #include "metric.h"
0024 
0025 static int mdsmap_show(struct seq_file *s, void *p)
0026 {
0027     int i;
0028     struct ceph_fs_client *fsc = s->private;
0029     struct ceph_mdsmap *mdsmap;
0030 
0031     if (!fsc->mdsc || !fsc->mdsc->mdsmap)
0032         return 0;
0033     mdsmap = fsc->mdsc->mdsmap;
0034     seq_printf(s, "epoch %d\n", mdsmap->m_epoch);
0035     seq_printf(s, "root %d\n", mdsmap->m_root);
0036     seq_printf(s, "max_mds %d\n", mdsmap->m_max_mds);
0037     seq_printf(s, "session_timeout %d\n", mdsmap->m_session_timeout);
0038     seq_printf(s, "session_autoclose %d\n", mdsmap->m_session_autoclose);
0039     for (i = 0; i < mdsmap->possible_max_rank; i++) {
0040         struct ceph_entity_addr *addr = &mdsmap->m_info[i].addr;
0041         int state = mdsmap->m_info[i].state;
0042         seq_printf(s, "\tmds%d\t%s\t(%s)\n", i,
0043                    ceph_pr_addr(addr),
0044                    ceph_mds_state_name(state));
0045     }
0046     return 0;
0047 }
0048 
0049 /*
0050  * mdsc debugfs
0051  */
0052 static int mdsc_show(struct seq_file *s, void *p)
0053 {
0054     struct ceph_fs_client *fsc = s->private;
0055     struct ceph_mds_client *mdsc = fsc->mdsc;
0056     struct ceph_mds_request *req;
0057     struct rb_node *rp;
0058     int pathlen = 0;
0059     u64 pathbase;
0060     char *path;
0061 
0062     mutex_lock(&mdsc->mutex);
0063     for (rp = rb_first(&mdsc->request_tree); rp; rp = rb_next(rp)) {
0064         req = rb_entry(rp, struct ceph_mds_request, r_node);
0065 
0066         if (req->r_request && req->r_session)
0067             seq_printf(s, "%lld\tmds%d\t", req->r_tid,
0068                    req->r_session->s_mds);
0069         else if (!req->r_request)
0070             seq_printf(s, "%lld\t(no request)\t", req->r_tid);
0071         else
0072             seq_printf(s, "%lld\t(no session)\t", req->r_tid);
0073 
0074         seq_printf(s, "%s", ceph_mds_op_name(req->r_op));
0075 
0076         if (test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags))
0077             seq_puts(s, "\t(unsafe)");
0078         else
0079             seq_puts(s, "\t");
0080 
0081         if (req->r_inode) {
0082             seq_printf(s, " #%llx", ceph_ino(req->r_inode));
0083         } else if (req->r_dentry) {
0084             path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
0085                             &pathbase, 0);
0086             if (IS_ERR(path))
0087                 path = NULL;
0088             spin_lock(&req->r_dentry->d_lock);
0089             seq_printf(s, " #%llx/%pd (%s)",
0090                    ceph_ino(d_inode(req->r_dentry->d_parent)),
0091                    req->r_dentry,
0092                    path ? path : "");
0093             spin_unlock(&req->r_dentry->d_lock);
0094             ceph_mdsc_free_path(path, pathlen);
0095         } else if (req->r_path1) {
0096             seq_printf(s, " #%llx/%s", req->r_ino1.ino,
0097                    req->r_path1);
0098         } else {
0099             seq_printf(s, " #%llx", req->r_ino1.ino);
0100         }
0101 
0102         if (req->r_old_dentry) {
0103             path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
0104                             &pathbase, 0);
0105             if (IS_ERR(path))
0106                 path = NULL;
0107             spin_lock(&req->r_old_dentry->d_lock);
0108             seq_printf(s, " #%llx/%pd (%s)",
0109                    req->r_old_dentry_dir ?
0110                    ceph_ino(req->r_old_dentry_dir) : 0,
0111                    req->r_old_dentry,
0112                    path ? path : "");
0113             spin_unlock(&req->r_old_dentry->d_lock);
0114             ceph_mdsc_free_path(path, pathlen);
0115         } else if (req->r_path2 && req->r_op != CEPH_MDS_OP_SYMLINK) {
0116             if (req->r_ino2.ino)
0117                 seq_printf(s, " #%llx/%s", req->r_ino2.ino,
0118                        req->r_path2);
0119             else
0120                 seq_printf(s, " %s", req->r_path2);
0121         }
0122 
0123         seq_puts(s, "\n");
0124     }
0125     mutex_unlock(&mdsc->mutex);
0126 
0127     return 0;
0128 }
0129 
0130 #define CEPH_LAT_METRIC_SHOW(name, total, avg, min, max, sq) {      \
0131     s64 _total, _avg, _min, _max, _sq, _st;             \
0132     _avg = ktime_to_us(avg);                    \
0133     _min = ktime_to_us(min == KTIME_MAX ? 0 : min);         \
0134     _max = ktime_to_us(max);                    \
0135     _total = total - 1;                     \
0136     _sq = _total > 0 ? DIV64_U64_ROUND_CLOSEST(sq, _total) : 0; \
0137     _st = int_sqrt64(_sq);                      \
0138     _st = ktime_to_us(_st);                     \
0139     seq_printf(s, "%-14s%-12lld%-16lld%-16lld%-16lld%lld\n",    \
0140            name, total, _avg, _min, _max, _st);         \
0141 }
0142 
0143 #define CEPH_SZ_METRIC_SHOW(name, total, avg, min, max, sum) {      \
0144     u64 _min = min == U64_MAX ? 0 : min;                \
0145     seq_printf(s, "%-14s%-12lld%-16llu%-16llu%-16llu%llu\n",    \
0146            name, total, avg, _min, max, sum);           \
0147 }
0148 
0149 static int metrics_file_show(struct seq_file *s, void *p)
0150 {
0151     struct ceph_fs_client *fsc = s->private;
0152     struct ceph_client_metric *m = &fsc->mdsc->metric;
0153 
0154     seq_printf(s, "item                               total\n");
0155     seq_printf(s, "------------------------------------------\n");
0156     seq_printf(s, "%-35s%lld\n", "total inodes",
0157            percpu_counter_sum(&m->total_inodes));
0158     seq_printf(s, "%-35s%lld\n", "opened files",
0159            atomic64_read(&m->opened_files));
0160     seq_printf(s, "%-35s%lld\n", "pinned i_caps",
0161            atomic64_read(&m->total_caps));
0162     seq_printf(s, "%-35s%lld\n", "opened inodes",
0163            percpu_counter_sum(&m->opened_inodes));
0164     return 0;
0165 }
0166 
0167 static const char * const metric_str[] = {
0168     "read",
0169     "write",
0170     "metadata",
0171     "copyfrom"
0172 };
0173 static int metrics_latency_show(struct seq_file *s, void *p)
0174 {
0175     struct ceph_fs_client *fsc = s->private;
0176     struct ceph_client_metric *cm = &fsc->mdsc->metric;
0177     struct ceph_metric *m;
0178     s64 total, avg, min, max, sq;
0179     int i;
0180 
0181     seq_printf(s, "item          total       avg_lat(us)     min_lat(us)     max_lat(us)     stdev(us)\n");
0182     seq_printf(s, "-----------------------------------------------------------------------------------\n");
0183 
0184     for (i = 0; i < METRIC_MAX; i++) {
0185         m = &cm->metric[i];
0186         spin_lock(&m->lock);
0187         total = m->total;
0188         avg = m->latency_avg;
0189         min = m->latency_min;
0190         max = m->latency_max;
0191         sq = m->latency_sq_sum;
0192         spin_unlock(&m->lock);
0193         CEPH_LAT_METRIC_SHOW(metric_str[i], total, avg, min, max, sq);
0194     }
0195 
0196     return 0;
0197 }
0198 
0199 static int metrics_size_show(struct seq_file *s, void *p)
0200 {
0201     struct ceph_fs_client *fsc = s->private;
0202     struct ceph_client_metric *cm = &fsc->mdsc->metric;
0203     struct ceph_metric *m;
0204     s64 total;
0205     u64 sum, avg, min, max;
0206     int i;
0207 
0208     seq_printf(s, "item          total       avg_sz(bytes)   min_sz(bytes)   max_sz(bytes)  total_sz(bytes)\n");
0209     seq_printf(s, "----------------------------------------------------------------------------------------\n");
0210 
0211     for (i = 0; i < METRIC_MAX; i++) {
0212         /* skip 'metadata' as it doesn't use the size metric */
0213         if (i == METRIC_METADATA)
0214             continue;
0215         m = &cm->metric[i];
0216         spin_lock(&m->lock);
0217         total = m->total;
0218         sum = m->size_sum;
0219         avg = total > 0 ? DIV64_U64_ROUND_CLOSEST(sum, total) : 0;
0220         min = m->size_min;
0221         max = m->size_max;
0222         spin_unlock(&m->lock);
0223         CEPH_SZ_METRIC_SHOW(metric_str[i], total, avg, min, max, sum);
0224     }
0225 
0226     return 0;
0227 }
0228 
0229 static int metrics_caps_show(struct seq_file *s, void *p)
0230 {
0231     struct ceph_fs_client *fsc = s->private;
0232     struct ceph_client_metric *m = &fsc->mdsc->metric;
0233     int nr_caps = 0;
0234 
0235     seq_printf(s, "item          total           miss            hit\n");
0236     seq_printf(s, "-------------------------------------------------\n");
0237 
0238     seq_printf(s, "%-14s%-16lld%-16lld%lld\n", "d_lease",
0239            atomic64_read(&m->total_dentries),
0240            percpu_counter_sum(&m->d_lease_mis),
0241            percpu_counter_sum(&m->d_lease_hit));
0242 
0243     nr_caps = atomic64_read(&m->total_caps);
0244     seq_printf(s, "%-14s%-16d%-16lld%lld\n", "caps", nr_caps,
0245            percpu_counter_sum(&m->i_caps_mis),
0246            percpu_counter_sum(&m->i_caps_hit));
0247 
0248     return 0;
0249 }
0250 
0251 static int caps_show_cb(struct inode *inode, struct ceph_cap *cap, void *p)
0252 {
0253     struct seq_file *s = p;
0254 
0255     seq_printf(s, "0x%-17llx%-3d%-17s%-17s\n", ceph_ino(inode),
0256            cap->session->s_mds,
0257            ceph_cap_string(cap->issued),
0258            ceph_cap_string(cap->implemented));
0259     return 0;
0260 }
0261 
0262 static int caps_show(struct seq_file *s, void *p)
0263 {
0264     struct ceph_fs_client *fsc = s->private;
0265     struct ceph_mds_client *mdsc = fsc->mdsc;
0266     int total, avail, used, reserved, min, i;
0267     struct cap_wait *cw;
0268 
0269     ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
0270     seq_printf(s, "total\t\t%d\n"
0271            "avail\t\t%d\n"
0272            "used\t\t%d\n"
0273            "reserved\t%d\n"
0274            "min\t\t%d\n\n",
0275            total, avail, used, reserved, min);
0276     seq_printf(s, "ino              mds  issued           implemented\n");
0277     seq_printf(s, "--------------------------------------------------\n");
0278 
0279     mutex_lock(&mdsc->mutex);
0280     for (i = 0; i < mdsc->max_sessions; i++) {
0281         struct ceph_mds_session *session;
0282 
0283         session = __ceph_lookup_mds_session(mdsc, i);
0284         if (!session)
0285             continue;
0286         mutex_unlock(&mdsc->mutex);
0287         mutex_lock(&session->s_mutex);
0288         ceph_iterate_session_caps(session, caps_show_cb, s);
0289         mutex_unlock(&session->s_mutex);
0290         ceph_put_mds_session(session);
0291         mutex_lock(&mdsc->mutex);
0292     }
0293     mutex_unlock(&mdsc->mutex);
0294 
0295     seq_printf(s, "\n\nWaiters:\n--------\n");
0296     seq_printf(s, "tgid         ino                need             want\n");
0297     seq_printf(s, "-----------------------------------------------------\n");
0298 
0299     spin_lock(&mdsc->caps_list_lock);
0300     list_for_each_entry(cw, &mdsc->cap_wait_list, list) {
0301         seq_printf(s, "%-13d0x%-17llx%-17s%-17s\n", cw->tgid, cw->ino,
0302                 ceph_cap_string(cw->need),
0303                 ceph_cap_string(cw->want));
0304     }
0305     spin_unlock(&mdsc->caps_list_lock);
0306 
0307     return 0;
0308 }
0309 
0310 static int mds_sessions_show(struct seq_file *s, void *ptr)
0311 {
0312     struct ceph_fs_client *fsc = s->private;
0313     struct ceph_mds_client *mdsc = fsc->mdsc;
0314     struct ceph_auth_client *ac = fsc->client->monc.auth;
0315     struct ceph_options *opt = fsc->client->options;
0316     int mds;
0317 
0318     mutex_lock(&mdsc->mutex);
0319 
0320     /* The 'num' portion of an 'entity name' */
0321     seq_printf(s, "global_id %llu\n", ac->global_id);
0322 
0323     /* The -o name mount argument */
0324     seq_printf(s, "name \"%s\"\n", opt->name ? opt->name : "");
0325 
0326     /* The list of MDS session rank+state */
0327     for (mds = 0; mds < mdsc->max_sessions; mds++) {
0328         struct ceph_mds_session *session =
0329             __ceph_lookup_mds_session(mdsc, mds);
0330         if (!session) {
0331             continue;
0332         }
0333         mutex_unlock(&mdsc->mutex);
0334         seq_printf(s, "mds.%d %s\n",
0335                 session->s_mds,
0336                 ceph_session_state_name(session->s_state));
0337 
0338         ceph_put_mds_session(session);
0339         mutex_lock(&mdsc->mutex);
0340     }
0341     mutex_unlock(&mdsc->mutex);
0342 
0343     return 0;
0344 }
0345 
0346 static int status_show(struct seq_file *s, void *p)
0347 {
0348     struct ceph_fs_client *fsc = s->private;
0349     struct ceph_entity_inst *inst = &fsc->client->msgr.inst;
0350     struct ceph_entity_addr *client_addr = ceph_client_addr(fsc->client);
0351 
0352     seq_printf(s, "instance: %s.%lld %s/%u\n", ENTITY_NAME(inst->name),
0353            ceph_pr_addr(client_addr), le32_to_cpu(client_addr->nonce));
0354     seq_printf(s, "blocklisted: %s\n", fsc->blocklisted ? "true" : "false");
0355 
0356     return 0;
0357 }
0358 
0359 DEFINE_SHOW_ATTRIBUTE(mdsmap);
0360 DEFINE_SHOW_ATTRIBUTE(mdsc);
0361 DEFINE_SHOW_ATTRIBUTE(caps);
0362 DEFINE_SHOW_ATTRIBUTE(mds_sessions);
0363 DEFINE_SHOW_ATTRIBUTE(status);
0364 DEFINE_SHOW_ATTRIBUTE(metrics_file);
0365 DEFINE_SHOW_ATTRIBUTE(metrics_latency);
0366 DEFINE_SHOW_ATTRIBUTE(metrics_size);
0367 DEFINE_SHOW_ATTRIBUTE(metrics_caps);
0368 
0369 
0370 /*
0371  * debugfs
0372  */
0373 static int congestion_kb_set(void *data, u64 val)
0374 {
0375     struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
0376 
0377     fsc->mount_options->congestion_kb = (int)val;
0378     return 0;
0379 }
0380 
0381 static int congestion_kb_get(void *data, u64 *val)
0382 {
0383     struct ceph_fs_client *fsc = (struct ceph_fs_client *)data;
0384 
0385     *val = (u64)fsc->mount_options->congestion_kb;
0386     return 0;
0387 }
0388 
0389 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
0390             congestion_kb_set, "%llu\n");
0391 
0392 
0393 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
0394 {
0395     dout("ceph_fs_debugfs_cleanup\n");
0396     debugfs_remove(fsc->debugfs_bdi);
0397     debugfs_remove(fsc->debugfs_congestion_kb);
0398     debugfs_remove(fsc->debugfs_mdsmap);
0399     debugfs_remove(fsc->debugfs_mds_sessions);
0400     debugfs_remove(fsc->debugfs_caps);
0401     debugfs_remove(fsc->debugfs_status);
0402     debugfs_remove(fsc->debugfs_mdsc);
0403     debugfs_remove_recursive(fsc->debugfs_metrics_dir);
0404 }
0405 
0406 void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
0407 {
0408     char name[100];
0409 
0410     dout("ceph_fs_debugfs_init\n");
0411     fsc->debugfs_congestion_kb =
0412         debugfs_create_file("writeback_congestion_kb",
0413                     0600,
0414                     fsc->client->debugfs_dir,
0415                     fsc,
0416                     &congestion_kb_fops);
0417 
0418     snprintf(name, sizeof(name), "../../bdi/%s",
0419          bdi_dev_name(fsc->sb->s_bdi));
0420     fsc->debugfs_bdi =
0421         debugfs_create_symlink("bdi",
0422                        fsc->client->debugfs_dir,
0423                        name);
0424 
0425     fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
0426                     0400,
0427                     fsc->client->debugfs_dir,
0428                     fsc,
0429                     &mdsmap_fops);
0430 
0431     fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
0432                     0400,
0433                     fsc->client->debugfs_dir,
0434                     fsc,
0435                     &mds_sessions_fops);
0436 
0437     fsc->debugfs_mdsc = debugfs_create_file("mdsc",
0438                         0400,
0439                         fsc->client->debugfs_dir,
0440                         fsc,
0441                         &mdsc_fops);
0442 
0443     fsc->debugfs_caps = debugfs_create_file("caps",
0444                         0400,
0445                         fsc->client->debugfs_dir,
0446                         fsc,
0447                         &caps_fops);
0448 
0449     fsc->debugfs_status = debugfs_create_file("status",
0450                           0400,
0451                           fsc->client->debugfs_dir,
0452                           fsc,
0453                           &status_fops);
0454 
0455     fsc->debugfs_metrics_dir = debugfs_create_dir("metrics",
0456                               fsc->client->debugfs_dir);
0457 
0458     debugfs_create_file("file", 0400, fsc->debugfs_metrics_dir, fsc,
0459                 &metrics_file_fops);
0460     debugfs_create_file("latency", 0400, fsc->debugfs_metrics_dir, fsc,
0461                 &metrics_latency_fops);
0462     debugfs_create_file("size", 0400, fsc->debugfs_metrics_dir, fsc,
0463                 &metrics_size_fops);
0464     debugfs_create_file("caps", 0400, fsc->debugfs_metrics_dir, fsc,
0465                 &metrics_caps_fops);
0466 }
0467 
0468 
0469 #else  /* CONFIG_DEBUG_FS */
0470 
0471 void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
0472 {
0473 }
0474 
0475 void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
0476 {
0477 }
0478 
0479 #endif  /* CONFIG_DEBUG_FS */
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