net/ceph/debugfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/ceph/ceph_debug.h>
   3
   4 #include <linux/device.h>
   5 #include <linux/slab.h>
   6 #include <linux/module.h>
   7 #include <linux/ctype.h>
   8 #include <linux/debugfs.h>
   9 #include <linux/seq_file.h>
  10
  11 #include <linux/ceph/libceph.h>
  12 #include <linux/ceph/mon_client.h>
  13 #include <linux/ceph/auth.h>
  14 #include <linux/ceph/debugfs.h>
  15
  16 #ifdef CONFIG_DEBUG_FS
  17
  18 /*
  19  * Implement /sys/kernel/debug/ceph fun
  20  *
  21  * /sys/kernel/debug/ceph/client*  - an instance of the ceph client
  22  *      .../osdmap      - current osdmap
  23  *      .../monmap      - current monmap
  24  *      .../osdc        - active osd requests
  25  *      .../monc        - mon client state
  26  *      .../client_options - libceph-only (i.e. not rbd or cephfs) options
  27  *      .../dentry_lru  - dump contents of dentry lru
  28  *      .../caps        - expose cap (reservation) stats
  29  *      .../bdi         - symlink to ../../bdi/something
  30  */
  31
  32 static struct dentry *ceph_debugfs_dir;
  33
  34 static int monmap_show(struct seq_file *s, void *p)
  35 {
  36         int i;
  37         struct ceph_client *client = s->private;
  38
  39         if (client->monc.monmap == NULL)
  40                 return 0;
  41
  42         seq_printf(s, "epoch %d\n", client->monc.monmap->epoch);
  43         for (i = 0; i < client->monc.monmap->num_mon; i++) {
  44                 struct ceph_entity_inst *inst =
  45                         &client->monc.monmap->mon_inst[i];
  46
  47                 seq_printf(s, "\t%s%lld\t%s\n",
  48                            ENTITY_NAME(inst->name),
  49                            ceph_pr_addr(&inst->addr.in_addr));
  50         }
  51         return 0;
  52 }
  53
  54 static int osdmap_show(struct seq_file *s, void *p)
  55 {
  56         int i;
  57         struct ceph_client *client = s->private;
  58         struct ceph_osd_client *osdc = &client->osdc;
  59         struct ceph_osdmap *map = osdc->osdmap;
  60         struct rb_node *n;
  61
  62         if (map == NULL)
  63                 return 0;
  64
  65         down_read(&osdc->lock);
  66         seq_printf(s, "epoch %u barrier %u flags 0x%x\n", map->epoch,
  67                         osdc->epoch_barrier, map->flags);
  68
  69         for (n = rb_first(&map->pg_pools); n; n = rb_next(n)) {
  70                 struct ceph_pg_pool_info *pi =
  71                         rb_entry(n, struct ceph_pg_pool_info, node);
  72
  73                 seq_printf(s, "pool %lld '%s' type %d size %d min_size %d pg_num %u pg_num_mask %d flags 0x%llx lfor %u read_tier %lld write_tier %lld\n",
  74                            pi->id, pi->name, pi->type, pi->size, pi->min_size,
  75                            pi->pg_num, pi->pg_num_mask, pi->flags,
  76                            pi->last_force_request_resend, pi->read_tier,
  77                            pi->write_tier);
  78         }
  79         for (i = 0; i < map->max_osd; i++) {
  80                 struct ceph_entity_addr *addr = &map->osd_addr[i];
  81                 u32 state = map->osd_state[i];
  82                 char sb[64];
  83
  84                 seq_printf(s, "osd%d\t%s\t%3d%%\t(%s)\t%3d%%\n",
  85                            i, ceph_pr_addr(&addr->in_addr),
  86                            ((map->osd_weight[i]*100) >> 16),
  87                            ceph_osdmap_state_str(sb, sizeof(sb), state),
  88                            ((ceph_get_primary_affinity(map, i)*100) >> 16));
  89         }
  90         for (n = rb_first(&map->pg_temp); n; n = rb_next(n)) {
  91                 struct ceph_pg_mapping *pg =
  92                         rb_entry(n, struct ceph_pg_mapping, node);
  93
  94                 seq_printf(s, "pg_temp %llu.%x [", pg->pgid.pool,
  95                            pg->pgid.seed);
  96                 for (i = 0; i < pg->pg_temp.len; i++)
  97                         seq_printf(s, "%s%d", (i == 0 ? "" : ","),
  98                                    pg->pg_temp.osds[i]);
  99                 seq_printf(s, "]\n");
 100         }
 101         for (n = rb_first(&map->primary_temp); n; n = rb_next(n)) {
 102                 struct ceph_pg_mapping *pg =
 103                         rb_entry(n, struct ceph_pg_mapping, node);
 104
 105                 seq_printf(s, "primary_temp %llu.%x %d\n", pg->pgid.pool,
 106                            pg->pgid.seed, pg->primary_temp.osd);
 107         }
 108         for (n = rb_first(&map->pg_upmap); n; n = rb_next(n)) {
 109                 struct ceph_pg_mapping *pg =
 110                         rb_entry(n, struct ceph_pg_mapping, node);
 111
 112                 seq_printf(s, "pg_upmap %llu.%x [", pg->pgid.pool,
 113                            pg->pgid.seed);
 114                 for (i = 0; i < pg->pg_upmap.len; i++)
 115                         seq_printf(s, "%s%d", (i == 0 ? "" : ","),
 116                                    pg->pg_upmap.osds[i]);
 117                 seq_printf(s, "]\n");
 118         }
 119         for (n = rb_first(&map->pg_upmap_items); n; n = rb_next(n)) {
 120                 struct ceph_pg_mapping *pg =
 121                         rb_entry(n, struct ceph_pg_mapping, node);
 122
 123                 seq_printf(s, "pg_upmap_items %llu.%x [", pg->pgid.pool,
 124                            pg->pgid.seed);
 125                 for (i = 0; i < pg->pg_upmap_items.len; i++)
 126                         seq_printf(s, "%s%d->%d", (i == 0 ? "" : ","),
 127                                    pg->pg_upmap_items.from_to[i][0],
 128                                    pg->pg_upmap_items.from_to[i][1]);
 129                 seq_printf(s, "]\n");
 130         }
 131
 132         up_read(&osdc->lock);
 133         return 0;
 134 }
 135
 136 static int monc_show(struct seq_file *s, void *p)
 137 {
 138         struct ceph_client *client = s->private;
 139         struct ceph_mon_generic_request *req;
 140         struct ceph_mon_client *monc = &client->monc;
 141         struct rb_node *rp;
 142         int i;
 143
 144         mutex_lock(&monc->mutex);
 145
 146         for (i = 0; i < ARRAY_SIZE(monc->subs); i++) {
 147                 seq_printf(s, "have %s %u", ceph_sub_str[i],
 148                            monc->subs[i].have);
 149                 if (monc->subs[i].want)
 150                         seq_printf(s, " want %llu%s",
 151                                    le64_to_cpu(monc->subs[i].item.start),
 152                                    (monc->subs[i].item.flags &
 153                                         CEPH_SUBSCRIBE_ONETIME ?  "" : "+"));
 154                 seq_putc(s, '\n');
 155         }
 156         seq_printf(s, "fs_cluster_id %d\n", monc->fs_cluster_id);
 157
 158         for (rp = rb_first(&monc->generic_request_tree); rp; rp = rb_next(rp)) {
 159                 __u16 op;
 160                 req = rb_entry(rp, struct ceph_mon_generic_request, node);
 161                 op = le16_to_cpu(req->request->hdr.type);
 162                 if (op == CEPH_MSG_STATFS)
 163                         seq_printf(s, "%llu statfs\n", req->tid);
 164                 else if (op == CEPH_MSG_MON_GET_VERSION)
 165                         seq_printf(s, "%llu mon_get_version", req->tid);
 166                 else
 167                         seq_printf(s, "%llu unknown\n", req->tid);
 168         }
 169
 170         mutex_unlock(&monc->mutex);
 171         return 0;
 172 }
 173
 174 static void dump_spgid(struct seq_file *s, const struct ceph_spg *spgid)
 175 {
 176         seq_printf(s, "%llu.%x", spgid->pgid.pool, spgid->pgid.seed);
 177         if (spgid->shard != CEPH_SPG_NOSHARD)
 178                 seq_printf(s, "s%d", spgid->shard);
 179 }
 180
 181 static void dump_target(struct seq_file *s, struct ceph_osd_request_target *t)
 182 {
 183         int i;
 184
 185         seq_printf(s, "osd%d\t%llu.%x\t", t->osd, t->pgid.pool, t->pgid.seed);
 186         dump_spgid(s, &t->spgid);
 187         seq_puts(s, "\t[");
 188         for (i = 0; i < t->up.size; i++)
 189                 seq_printf(s, "%s%d", (!i ? "" : ","), t->up.osds[i]);
 190         seq_printf(s, "]/%d\t[", t->up.primary);
 191         for (i = 0; i < t->acting.size; i++)
 192                 seq_printf(s, "%s%d", (!i ? "" : ","), t->acting.osds[i]);
 193         seq_printf(s, "]/%d\te%u\t", t->acting.primary, t->epoch);
 194         if (t->target_oloc.pool_ns) {
 195                 seq_printf(s, "%*pE/%*pE\t0x%x",
 196                         (int)t->target_oloc.pool_ns->len,
 197                         t->target_oloc.pool_ns->str,
 198                         t->target_oid.name_len, t->target_oid.name, t->flags);
 199         } else {
 200                 seq_printf(s, "%*pE\t0x%x", t->target_oid.name_len,
 201                         t->target_oid.name, t->flags);
 202         }
 203         if (t->paused)
 204                 seq_puts(s, "\tP");
 205 }
 206
 207 static void dump_request(struct seq_file *s, struct ceph_osd_request *req)
 208 {
 209         int i;
 210
 211         seq_printf(s, "%llu\t", req->r_tid);
 212         dump_target(s, &req->r_t);
 213
 214         seq_printf(s, "\t%d", req->r_attempts);
 215
 216         for (i = 0; i < req->r_num_ops; i++) {
 217                 struct ceph_osd_req_op *op = &req->r_ops[i];
 218
 219                 seq_printf(s, "%s%s", (i == 0 ? "\t" : ","),
 220                            ceph_osd_op_name(op->op));
 221                 if (op->op == CEPH_OSD_OP_WATCH)
 222                         seq_printf(s, "-%s",
 223                                    ceph_osd_watch_op_name(op->watch.op));
 224         }
 225
 226         seq_putc(s, '\n');
 227 }
 228
 229 static void dump_requests(struct seq_file *s, struct ceph_osd *osd)
 230 {
 231         struct rb_node *n;
 232
 233         mutex_lock(&osd->lock);
 234         for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
 235                 struct ceph_osd_request *req =
 236                     rb_entry(n, struct ceph_osd_request, r_node);
 237
 238                 dump_request(s, req);
 239         }
 240
 241         mutex_unlock(&osd->lock);
 242 }
 243
 244 static void dump_linger_request(struct seq_file *s,
 245                                 struct ceph_osd_linger_request *lreq)
 246 {
 247         seq_printf(s, "%llu\t", lreq->linger_id);
 248         dump_target(s, &lreq->t);
 249
 250         seq_printf(s, "\t%u\t%s%s/%d\n", lreq->register_gen,
 251                    lreq->is_watch ? "W" : "N", lreq->committed ? "C" : "",
 252                    lreq->last_error);
 253 }
 254
 255 static void dump_linger_requests(struct seq_file *s, struct ceph_osd *osd)
 256 {
 257         struct rb_node *n;
 258
 259         mutex_lock(&osd->lock);
 260         for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
 261                 struct ceph_osd_linger_request *lreq =
 262                     rb_entry(n, struct ceph_osd_linger_request, node);
 263
 264                 dump_linger_request(s, lreq);
 265         }
 266
 267         mutex_unlock(&osd->lock);
 268 }
 269
 270 static void dump_snapid(struct seq_file *s, u64 snapid)
 271 {
 272         if (snapid == CEPH_NOSNAP)
 273                 seq_puts(s, "head");
 274         else if (snapid == CEPH_SNAPDIR)
 275                 seq_puts(s, "snapdir");
 276         else
 277                 seq_printf(s, "%llx", snapid);
 278 }
 279
 280 static void dump_name_escaped(struct seq_file *s, unsigned char *name,
 281                               size_t len)
 282 {
 283         size_t i;
 284
 285         for (i = 0; i < len; i++) {
 286                 if (name[i] == '%' || name[i] == ':' || name[i] == '/' ||
 287                     name[i] < 32 || name[i] >= 127) {
 288                         seq_printf(s, "%%%02x", name[i]);
 289                 } else {
 290                         seq_putc(s, name[i]);
 291                 }
 292         }
 293 }
 294
 295 static void dump_hoid(struct seq_file *s, const struct ceph_hobject_id *hoid)
 296 {
 297         if (hoid->snapid == 0 && hoid->hash == 0 && !hoid->is_max &&
 298             hoid->pool == S64_MIN) {
 299                 seq_puts(s, "MIN");
 300                 return;
 301         }
 302         if (hoid->is_max) {
 303                 seq_puts(s, "MAX");
 304                 return;
 305         }
 306         seq_printf(s, "%lld:%08x:", hoid->pool, hoid->hash_reverse_bits);
 307         dump_name_escaped(s, hoid->nspace, hoid->nspace_len);
 308         seq_putc(s, ':');
 309         dump_name_escaped(s, hoid->key, hoid->key_len);
 310         seq_putc(s, ':');
 311         dump_name_escaped(s, hoid->oid, hoid->oid_len);
 312         seq_putc(s, ':');
 313         dump_snapid(s, hoid->snapid);
 314 }
 315
 316 static void dump_backoffs(struct seq_file *s, struct ceph_osd *osd)
 317 {
 318         struct rb_node *n;
 319
 320         mutex_lock(&osd->lock);
 321         for (n = rb_first(&osd->o_backoffs_by_id); n; n = rb_next(n)) {
 322                 struct ceph_osd_backoff *backoff =
 323                     rb_entry(n, struct ceph_osd_backoff, id_node);
 324
 325                 seq_printf(s, "osd%d\t", osd->o_osd);
 326                 dump_spgid(s, &backoff->spgid);
 327                 seq_printf(s, "\t%llu\t", backoff->id);
 328                 dump_hoid(s, backoff->begin);
 329                 seq_putc(s, '\t');
 330                 dump_hoid(s, backoff->end);
 331                 seq_putc(s, '\n');
 332         }
 333
 334         mutex_unlock(&osd->lock);
 335 }
 336
 337 static int osdc_show(struct seq_file *s, void *pp)
 338 {
 339         struct ceph_client *client = s->private;
 340         struct ceph_osd_client *osdc = &client->osdc;
 341         struct rb_node *n;
 342
 343         down_read(&osdc->lock);
 344         seq_printf(s, "REQUESTS %d homeless %d\n",
 345                    atomic_read(&osdc->num_requests),
 346                    atomic_read(&osdc->num_homeless));
 347         for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
 348                 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
 349
 350                 dump_requests(s, osd);
 351         }
 352         dump_requests(s, &osdc->homeless_osd);
 353
 354         seq_puts(s, "LINGER REQUESTS\n");
 355         for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
 356                 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
 357
 358                 dump_linger_requests(s, osd);
 359         }
 360         dump_linger_requests(s, &osdc->homeless_osd);
 361
 362         seq_puts(s, "BACKOFFS\n");
 363         for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
 364                 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
 365
 366                 dump_backoffs(s, osd);
 367         }
 368
 369         up_read(&osdc->lock);
 370         return 0;
 371 }
 372
 373 static int client_options_show(struct seq_file *s, void *p)
 374 {
 375         struct ceph_client *client = s->private;
 376         int ret;
 377
 378         ret = ceph_print_client_options(s, client);
 379         if (ret)
 380                 return ret;
 381
 382         seq_putc(s, '\n');
 383         return 0;
 384 }
 385
 386 CEPH_DEFINE_SHOW_FUNC(monmap_show)
 387 CEPH_DEFINE_SHOW_FUNC(osdmap_show)
 388 CEPH_DEFINE_SHOW_FUNC(monc_show)
 389 CEPH_DEFINE_SHOW_FUNC(osdc_show)
 390 CEPH_DEFINE_SHOW_FUNC(client_options_show)
 391
 392 int __init ceph_debugfs_init(void)
 393 {
 394         ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
 395         if (!ceph_debugfs_dir)
 396                 return -ENOMEM;
 397         return 0;
 398 }
 399
 400 void ceph_debugfs_cleanup(void)
 401 {
 402         debugfs_remove(ceph_debugfs_dir);
 403 }
 404
 405 int ceph_debugfs_client_init(struct ceph_client *client)
 406 {
 407         int ret = -ENOMEM;
 408         char name[80];
 409
 410         snprintf(name, sizeof(name), "%pU.client%lld", &client->fsid,
 411                  client->monc.auth->global_id);
 412
 413         dout("ceph_debugfs_client_init %p %s\n", client, name);
 414
 415         BUG_ON(client->debugfs_dir);
 416         client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
 417         if (!client->debugfs_dir)
 418                 goto out;
 419
 420         client->monc.debugfs_file = debugfs_create_file("monc",
 421                                                       0400,
 422                                                       client->debugfs_dir,
 423                                                       client,
 424                                                       &monc_show_fops);
 425         if (!client->monc.debugfs_file)
 426                 goto out;
 427
 428         client->osdc.debugfs_file = debugfs_create_file("osdc",
 429                                                       0400,
 430                                                       client->debugfs_dir,
 431                                                       client,
 432                                                       &osdc_show_fops);
 433         if (!client->osdc.debugfs_file)
 434                 goto out;
 435
 436         client->debugfs_monmap = debugfs_create_file("monmap",
 437                                         0400,
 438                                         client->debugfs_dir,
 439                                         client,
 440                                         &monmap_show_fops);
 441         if (!client->debugfs_monmap)
 442                 goto out;
 443
 444         client->debugfs_osdmap = debugfs_create_file("osdmap",
 445                                         0400,
 446                                         client->debugfs_dir,
 447                                         client,
 448                                         &osdmap_show_fops);
 449         if (!client->debugfs_osdmap)
 450                 goto out;
 451
 452         client->debugfs_options = debugfs_create_file("client_options",
 453                                         0400,
 454                                         client->debugfs_dir,
 455                                         client,
 456                                         &client_options_show_fops);
 457         if (!client->debugfs_options)
 458                 goto out;
 459
 460         return 0;
 461
 462 out:
 463         ceph_debugfs_client_cleanup(client);
 464         return ret;
 465 }
 466
 467 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 468 {
 469         dout("ceph_debugfs_client_cleanup %p\n", client);
 470         debugfs_remove(client->debugfs_options);
 471         debugfs_remove(client->debugfs_osdmap);
 472         debugfs_remove(client->debugfs_monmap);
 473         debugfs_remove(client->osdc.debugfs_file);
 474         debugfs_remove(client->monc.debugfs_file);
 475         debugfs_remove(client->debugfs_dir);
 476 }
 477
 478 #else  /* CONFIG_DEBUG_FS */
 479
 480 int __init ceph_debugfs_init(void)
 481 {
 482         return 0;
 483 }
 484
 485 void ceph_debugfs_cleanup(void)
 486 {
 487 }
 488
 489 int ceph_debugfs_client_init(struct ceph_client *client)
 490 {
 491         return 0;
 492 }
 493
 494 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 495 {
 496 }
 497
 498 #endif  /* CONFIG_DEBUG_FS */