net/ceph/debugfs.c

   1 #include <linux/ceph/ceph_debug.h>
   2
   3 #include <linux/device.h>
   4 #include <linux/slab.h>
   5 #include <linux/module.h>
   6 #include <linux/ctype.h>
   7 #include <linux/debugfs.h>
   8 #include <linux/seq_file.h>
   9
  10 #include <linux/ceph/libceph.h>
  11 #include <linux/ceph/mon_client.h>
  12 #include <linux/ceph/auth.h>
  13 #include <linux/ceph/debugfs.h>
  14
  15 #ifdef CONFIG_DEBUG_FS
  16
  17 /*
  18  * Implement /sys/kernel/debug/ceph fun
  19  *
  20  * /sys/kernel/debug/ceph/client*  - an instance of the ceph client
  21  *      .../osdmap      - current osdmap
  22  *      .../monmap      - current monmap
  23  *      .../osdc        - active osd requests
  24  *      .../monc        - mon client state
  25  *      .../client_options - libceph-only (i.e. not rbd or cephfs) options
  26  *      .../dentry_lru  - dump contents of dentry lru
  27  *      .../caps        - expose cap (reservation) stats
  28  *      .../bdi         - symlink to ../../bdi/something
  29  */
  30
  31 static struct dentry *ceph_debugfs_dir;
  32
  33 static int monmap_show(struct seq_file *s, void *p)
  34 {
  35         int i;
  36         struct ceph_client *client = s->private;
  37
  38         if (client->monc.monmap == NULL)
  39                 return 0;
  40
  41         seq_printf(s, "epoch %d\n", client->monc.monmap->epoch);
  42         for (i = 0; i < client->monc.monmap->num_mon; i++) {
  43                 struct ceph_entity_inst *inst =
  44                         &client->monc.monmap->mon_inst[i];
  45
  46                 seq_printf(s, "\t%s%lld\t%s\n",
  47                            ENTITY_NAME(inst->name),
  48                            ceph_pr_addr(&inst->addr.in_addr));
  49         }
  50         return 0;
  51 }
  52
  53 static int osdmap_show(struct seq_file *s, void *p)
  54 {
  55         int i;
  56         struct ceph_client *client = s->private;
  57         struct ceph_osd_client *osdc = &client->osdc;
  58         struct ceph_osdmap *map = osdc->osdmap;
  59         struct rb_node *n;
  60
  61         if (map == NULL)
  62                 return 0;
  63
  64         down_read(&osdc->lock);
  65         seq_printf(s, "epoch %u barrier %u flags 0x%x\n", map->epoch,
  66                         osdc->epoch_barrier, map->flags);
  67
  68         for (n = rb_first(&map->pg_pools); n; n = rb_next(n)) {
  69                 struct ceph_pg_pool_info *pi =
  70                         rb_entry(n, struct ceph_pg_pool_info, node);
  71
  72                 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",
  73                            pi->id, pi->name, pi->type, pi->size, pi->min_size,
  74                            pi->pg_num, pi->pg_num_mask, pi->flags,
  75                            pi->last_force_request_resend, pi->read_tier,
  76                            pi->write_tier);
  77         }
  78         for (i = 0; i < map->max_osd; i++) {
  79                 struct ceph_entity_addr *addr = &map->osd_addr[i];
  80                 int state = map->osd_state[i];
  81                 char sb[64];
  82
  83                 seq_printf(s, "osd%d\t%s\t%3d%%\t(%s)\t%3d%%\n",
  84                            i, ceph_pr_addr(&addr->in_addr),
  85                            ((map->osd_weight[i]*100) >> 16),
  86                            ceph_osdmap_state_str(sb, sizeof(sb), state),
  87                            ((ceph_get_primary_affinity(map, i)*100) >> 16));
  88         }
  89         for (n = rb_first(&map->pg_temp); n; n = rb_next(n)) {
  90                 struct ceph_pg_mapping *pg =
  91                         rb_entry(n, struct ceph_pg_mapping, node);
  92
  93                 seq_printf(s, "pg_temp %llu.%x [", pg->pgid.pool,
  94                            pg->pgid.seed);
  95                 for (i = 0; i < pg->pg_temp.len; i++)
  96                         seq_printf(s, "%s%d", (i == 0 ? "" : ","),
  97                                    pg->pg_temp.osds[i]);
  98                 seq_printf(s, "]\n");
  99         }
 100         for (n = rb_first(&map->primary_temp); n; n = rb_next(n)) {
 101                 struct ceph_pg_mapping *pg =
 102                         rb_entry(n, struct ceph_pg_mapping, node);
 103
 104                 seq_printf(s, "primary_temp %llu.%x %d\n", pg->pgid.pool,
 105                            pg->pgid.seed, pg->primary_temp.osd);
 106         }
 107
 108         up_read(&osdc->lock);
 109         return 0;
 110 }
 111
 112 static int monc_show(struct seq_file *s, void *p)
 113 {
 114         struct ceph_client *client = s->private;
 115         struct ceph_mon_generic_request *req;
 116         struct ceph_mon_client *monc = &client->monc;
 117         struct rb_node *rp;
 118         int i;
 119
 120         mutex_lock(&monc->mutex);
 121
 122         for (i = 0; i < ARRAY_SIZE(monc->subs); i++) {
 123                 seq_printf(s, "have %s %u", ceph_sub_str[i],
 124                            monc->subs[i].have);
 125                 if (monc->subs[i].want)
 126                         seq_printf(s, " want %llu%s",
 127                                    le64_to_cpu(monc->subs[i].item.start),
 128                                    (monc->subs[i].item.flags &
 129                                         CEPH_SUBSCRIBE_ONETIME ?  "" : "+"));
 130                 seq_putc(s, '\n');
 131         }
 132         seq_printf(s, "fs_cluster_id %d\n", monc->fs_cluster_id);
 133
 134         for (rp = rb_first(&monc->generic_request_tree); rp; rp = rb_next(rp)) {
 135                 __u16 op;
 136                 req = rb_entry(rp, struct ceph_mon_generic_request, node);
 137                 op = le16_to_cpu(req->request->hdr.type);
 138                 if (op == CEPH_MSG_STATFS)
 139                         seq_printf(s, "%llu statfs\n", req->tid);
 140                 else if (op == CEPH_MSG_MON_GET_VERSION)
 141                         seq_printf(s, "%llu mon_get_version", req->tid);
 142                 else
 143                         seq_printf(s, "%llu unknown\n", req->tid);
 144         }
 145
 146         mutex_unlock(&monc->mutex);
 147         return 0;
 148 }
 149
 150 static void dump_target(struct seq_file *s, struct ceph_osd_request_target *t)
 151 {
 152         int i;
 153
 154         seq_printf(s, "osd%d\t%llu.%x\t[", t->osd, t->pgid.pool, t->pgid.seed);
 155         for (i = 0; i < t->up.size; i++)
 156                 seq_printf(s, "%s%d", (!i ? "" : ","), t->up.osds[i]);
 157         seq_printf(s, "]/%d\t[", t->up.primary);
 158         for (i = 0; i < t->acting.size; i++)
 159                 seq_printf(s, "%s%d", (!i ? "" : ","), t->acting.osds[i]);
 160         seq_printf(s, "]/%d\t", t->acting.primary);
 161         if (t->target_oloc.pool_ns) {
 162                 seq_printf(s, "%*pE/%*pE\t0x%x",
 163                         (int)t->target_oloc.pool_ns->len,
 164                         t->target_oloc.pool_ns->str,
 165                         t->target_oid.name_len, t->target_oid.name, t->flags);
 166         } else {
 167                 seq_printf(s, "%*pE\t0x%x", t->target_oid.name_len,
 168                         t->target_oid.name, t->flags);
 169         }
 170         if (t->paused)
 171                 seq_puts(s, "\tP");
 172 }
 173
 174 static void dump_request(struct seq_file *s, struct ceph_osd_request *req)
 175 {
 176         int i;
 177
 178         seq_printf(s, "%llu\t", req->r_tid);
 179         dump_target(s, &req->r_t);
 180
 181         seq_printf(s, "\t%d", req->r_attempts);
 182
 183         for (i = 0; i < req->r_num_ops; i++) {
 184                 struct ceph_osd_req_op *op = &req->r_ops[i];
 185
 186                 seq_printf(s, "%s%s", (i == 0 ? "\t" : ","),
 187                            ceph_osd_op_name(op->op));
 188                 if (op->op == CEPH_OSD_OP_WATCH)
 189                         seq_printf(s, "-%s",
 190                                    ceph_osd_watch_op_name(op->watch.op));
 191         }
 192
 193         seq_putc(s, '\n');
 194 }
 195
 196 static void dump_requests(struct seq_file *s, struct ceph_osd *osd)
 197 {
 198         struct rb_node *n;
 199
 200         mutex_lock(&osd->lock);
 201         for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
 202                 struct ceph_osd_request *req =
 203                     rb_entry(n, struct ceph_osd_request, r_node);
 204
 205                 dump_request(s, req);
 206         }
 207
 208         mutex_unlock(&osd->lock);
 209 }
 210
 211 static void dump_linger_request(struct seq_file *s,
 212                                 struct ceph_osd_linger_request *lreq)
 213 {
 214         seq_printf(s, "%llu\t", lreq->linger_id);
 215         dump_target(s, &lreq->t);
 216
 217         seq_printf(s, "\t%u\t%s%s/%d\n", lreq->register_gen,
 218                    lreq->is_watch ? "W" : "N", lreq->committed ? "C" : "",
 219                    lreq->last_error);
 220 }
 221
 222 static void dump_linger_requests(struct seq_file *s, struct ceph_osd *osd)
 223 {
 224         struct rb_node *n;
 225
 226         mutex_lock(&osd->lock);
 227         for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
 228                 struct ceph_osd_linger_request *lreq =
 229                     rb_entry(n, struct ceph_osd_linger_request, node);
 230
 231                 dump_linger_request(s, lreq);
 232         }
 233
 234         mutex_unlock(&osd->lock);
 235 }
 236
 237 static int osdc_show(struct seq_file *s, void *pp)
 238 {
 239         struct ceph_client *client = s->private;
 240         struct ceph_osd_client *osdc = &client->osdc;
 241         struct rb_node *n;
 242
 243         down_read(&osdc->lock);
 244         seq_printf(s, "REQUESTS %d homeless %d\n",
 245                    atomic_read(&osdc->num_requests),
 246                    atomic_read(&osdc->num_homeless));
 247         for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
 248                 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
 249
 250                 dump_requests(s, osd);
 251         }
 252         dump_requests(s, &osdc->homeless_osd);
 253
 254         seq_puts(s, "LINGER REQUESTS\n");
 255         for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
 256                 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
 257
 258                 dump_linger_requests(s, osd);
 259         }
 260         dump_linger_requests(s, &osdc->homeless_osd);
 261
 262         up_read(&osdc->lock);
 263         return 0;
 264 }
 265
 266 static int client_options_show(struct seq_file *s, void *p)
 267 {
 268         struct ceph_client *client = s->private;
 269         int ret;
 270
 271         ret = ceph_print_client_options(s, client);
 272         if (ret)
 273                 return ret;
 274
 275         seq_putc(s, '\n');
 276         return 0;
 277 }
 278
 279 CEPH_DEFINE_SHOW_FUNC(monmap_show)
 280 CEPH_DEFINE_SHOW_FUNC(osdmap_show)
 281 CEPH_DEFINE_SHOW_FUNC(monc_show)
 282 CEPH_DEFINE_SHOW_FUNC(osdc_show)
 283 CEPH_DEFINE_SHOW_FUNC(client_options_show)
 284
 285 int ceph_debugfs_init(void)
 286 {
 287         ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
 288         if (!ceph_debugfs_dir)
 289                 return -ENOMEM;
 290         return 0;
 291 }
 292
 293 void ceph_debugfs_cleanup(void)
 294 {
 295         debugfs_remove(ceph_debugfs_dir);
 296 }
 297
 298 int ceph_debugfs_client_init(struct ceph_client *client)
 299 {
 300         int ret = -ENOMEM;
 301         char name[80];
 302
 303         snprintf(name, sizeof(name), "%pU.client%lld", &client->fsid,
 304                  client->monc.auth->global_id);
 305
 306         dout("ceph_debugfs_client_init %p %s\n", client, name);
 307
 308         BUG_ON(client->debugfs_dir);
 309         client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
 310         if (!client->debugfs_dir)
 311                 goto out;
 312
 313         client->monc.debugfs_file = debugfs_create_file("monc",
 314                                                       0600,
 315                                                       client->debugfs_dir,
 316                                                       client,
 317                                                       &monc_show_fops);
 318         if (!client->monc.debugfs_file)
 319                 goto out;
 320
 321         client->osdc.debugfs_file = debugfs_create_file("osdc",
 322                                                       0600,
 323                                                       client->debugfs_dir,
 324                                                       client,
 325                                                       &osdc_show_fops);
 326         if (!client->osdc.debugfs_file)
 327                 goto out;
 328
 329         client->debugfs_monmap = debugfs_create_file("monmap",
 330                                         0600,
 331                                         client->debugfs_dir,
 332                                         client,
 333                                         &monmap_show_fops);
 334         if (!client->debugfs_monmap)
 335                 goto out;
 336
 337         client->debugfs_osdmap = debugfs_create_file("osdmap",
 338                                         0600,
 339                                         client->debugfs_dir,
 340                                         client,
 341                                         &osdmap_show_fops);
 342         if (!client->debugfs_osdmap)
 343                 goto out;
 344
 345         client->debugfs_options = debugfs_create_file("client_options",
 346                                         0600,
 347                                         client->debugfs_dir,
 348                                         client,
 349                                         &client_options_show_fops);
 350         if (!client->debugfs_options)
 351                 goto out;
 352
 353         return 0;
 354
 355 out:
 356         ceph_debugfs_client_cleanup(client);
 357         return ret;
 358 }
 359
 360 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 361 {
 362         dout("ceph_debugfs_client_cleanup %p\n", client);
 363         debugfs_remove(client->debugfs_options);
 364         debugfs_remove(client->debugfs_osdmap);
 365         debugfs_remove(client->debugfs_monmap);
 366         debugfs_remove(client->osdc.debugfs_file);
 367         debugfs_remove(client->monc.debugfs_file);
 368         debugfs_remove(client->debugfs_dir);
 369 }
 370
 371 #else  /* CONFIG_DEBUG_FS */
 372
 373 int ceph_debugfs_init(void)
 374 {
 375         return 0;
 376 }
 377
 378 void ceph_debugfs_cleanup(void)
 379 {
 380 }
 381
 382 int ceph_debugfs_client_init(struct ceph_client *client)
 383 {
 384         return 0;
 385 }
 386
 387 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 388 {
 389 }
 390
 391 #endif  /* CONFIG_DEBUG_FS */
 392
 393 EXPORT_SYMBOL(ceph_debugfs_init);
 394 EXPORT_SYMBOL(ceph_debugfs_cleanup);