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 %d flags 0x%x\n", map->epoch, map->flags);
  66
  67         for (n = rb_first(&map->pg_pools); n; n = rb_next(n)) {
  68                 struct ceph_pg_pool_info *pi =
  69                         rb_entry(n, struct ceph_pg_pool_info, node);
  70
  71                 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",
  72                            pi->id, pi->name, pi->type, pi->size, pi->min_size,
  73                            pi->pg_num, pi->pg_num_mask, pi->flags,
  74                            pi->last_force_request_resend, pi->read_tier,
  75                            pi->write_tier);
  76         }
  77         for (i = 0; i < map->max_osd; i++) {
  78                 struct ceph_entity_addr *addr = &map->osd_addr[i];
  79                 int state = map->osd_state[i];
  80                 char sb[64];
  81
  82                 seq_printf(s, "osd%d\t%s\t%3d%%\t(%s)\t%3d%%\n",
  83                            i, ceph_pr_addr(&addr->in_addr),
  84                            ((map->osd_weight[i]*100) >> 16),
  85                            ceph_osdmap_state_str(sb, sizeof(sb), state),
  86                            ((ceph_get_primary_affinity(map, i)*100) >> 16));
  87         }
  88         for (n = rb_first(&map->pg_temp); n; n = rb_next(n)) {
  89                 struct ceph_pg_mapping *pg =
  90                         rb_entry(n, struct ceph_pg_mapping, node);
  91
  92                 seq_printf(s, "pg_temp %llu.%x [", pg->pgid.pool,
  93                            pg->pgid.seed);
  94                 for (i = 0; i < pg->pg_temp.len; i++)
  95                         seq_printf(s, "%s%d", (i == 0 ? "" : ","),
  96                                    pg->pg_temp.osds[i]);
  97                 seq_printf(s, "]\n");
  98         }
  99         for (n = rb_first(&map->primary_temp); n; n = rb_next(n)) {
 100                 struct ceph_pg_mapping *pg =
 101                         rb_entry(n, struct ceph_pg_mapping, node);
 102
 103                 seq_printf(s, "primary_temp %llu.%x %d\n", pg->pgid.pool,
 104                            pg->pgid.seed, pg->primary_temp.osd);
 105         }
 106
 107         up_read(&osdc->lock);
 108         return 0;
 109 }
 110
 111 static int monc_show(struct seq_file *s, void *p)
 112 {
 113         struct ceph_client *client = s->private;
 114         struct ceph_mon_generic_request *req;
 115         struct ceph_mon_client *monc = &client->monc;
 116         struct rb_node *rp;
 117         int i;
 118
 119         mutex_lock(&monc->mutex);
 120
 121         for (i = 0; i < ARRAY_SIZE(monc->subs); i++) {
 122                 seq_printf(s, "have %s %u", ceph_sub_str[i],
 123                            monc->subs[i].have);
 124                 if (monc->subs[i].want)
 125                         seq_printf(s, " want %llu%s",
 126                                    le64_to_cpu(monc->subs[i].item.start),
 127                                    (monc->subs[i].item.flags &
 128                                         CEPH_SUBSCRIBE_ONETIME ?  "" : "+"));
 129                 seq_putc(s, '\n');
 130         }
 131
 132         for (rp = rb_first(&monc->generic_request_tree); rp; rp = rb_next(rp)) {
 133                 __u16 op;
 134                 req = rb_entry(rp, struct ceph_mon_generic_request, node);
 135                 op = le16_to_cpu(req->request->hdr.type);
 136                 if (op == CEPH_MSG_STATFS)
 137                         seq_printf(s, "%llu statfs\n", req->tid);
 138                 else if (op == CEPH_MSG_MON_GET_VERSION)
 139                         seq_printf(s, "%llu mon_get_version", req->tid);
 140                 else
 141                         seq_printf(s, "%llu unknown\n", req->tid);
 142         }
 143
 144         mutex_unlock(&monc->mutex);
 145         return 0;
 146 }
 147
 148 static void dump_target(struct seq_file *s, struct ceph_osd_request_target *t)
 149 {
 150         int i;
 151
 152         seq_printf(s, "osd%d\t%llu.%x\t[", t->osd, t->pgid.pool, t->pgid.seed);
 153         for (i = 0; i < t->up.size; i++)
 154                 seq_printf(s, "%s%d", (!i ? "" : ","), t->up.osds[i]);
 155         seq_printf(s, "]/%d\t[", t->up.primary);
 156         for (i = 0; i < t->acting.size; i++)
 157                 seq_printf(s, "%s%d", (!i ? "" : ","), t->acting.osds[i]);
 158         seq_printf(s, "]/%d\t%*pE\t0x%x", t->acting.primary,
 159                    t->target_oid.name_len, t->target_oid.name, t->flags);
 160         if (t->paused)
 161                 seq_puts(s, "\tP");
 162 }
 163
 164 static void dump_request(struct seq_file *s, struct ceph_osd_request *req)
 165 {
 166         int i;
 167
 168         seq_printf(s, "%llu\t", req->r_tid);
 169         dump_target(s, &req->r_t);
 170
 171         seq_printf(s, "\t%d\t%u'%llu", req->r_attempts,
 172                    le32_to_cpu(req->r_replay_version.epoch),
 173                    le64_to_cpu(req->r_replay_version.version));
 174
 175         for (i = 0; i < req->r_num_ops; i++) {
 176                 struct ceph_osd_req_op *op = &req->r_ops[i];
 177
 178                 seq_printf(s, "%s%s", (i == 0 ? "\t" : ","),
 179                            ceph_osd_op_name(op->op));
 180                 if (op->op == CEPH_OSD_OP_WATCH)
 181                         seq_printf(s, "-%s",
 182                                    ceph_osd_watch_op_name(op->watch.op));
 183         }
 184
 185         seq_putc(s, '\n');
 186 }
 187
 188 static void dump_requests(struct seq_file *s, struct ceph_osd *osd)
 189 {
 190         struct rb_node *n;
 191
 192         mutex_lock(&osd->lock);
 193         for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
 194                 struct ceph_osd_request *req =
 195                     rb_entry(n, struct ceph_osd_request, r_node);
 196
 197                 dump_request(s, req);
 198         }
 199
 200         mutex_unlock(&osd->lock);
 201 }
 202
 203 static void dump_linger_request(struct seq_file *s,
 204                                 struct ceph_osd_linger_request *lreq)
 205 {
 206         seq_printf(s, "%llu\t", lreq->linger_id);
 207         dump_target(s, &lreq->t);
 208
 209         seq_printf(s, "\t%u\t%s%s/%d\n", lreq->register_gen,
 210                    lreq->is_watch ? "W" : "N", lreq->committed ? "C" : "",
 211                    lreq->last_error);
 212 }
 213
 214 static void dump_linger_requests(struct seq_file *s, struct ceph_osd *osd)
 215 {
 216         struct rb_node *n;
 217
 218         mutex_lock(&osd->lock);
 219         for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
 220                 struct ceph_osd_linger_request *lreq =
 221                     rb_entry(n, struct ceph_osd_linger_request, node);
 222
 223                 dump_linger_request(s, lreq);
 224         }
 225
 226         mutex_unlock(&osd->lock);
 227 }
 228
 229 static int osdc_show(struct seq_file *s, void *pp)
 230 {
 231         struct ceph_client *client = s->private;
 232         struct ceph_osd_client *osdc = &client->osdc;
 233         struct rb_node *n;
 234
 235         down_read(&osdc->lock);
 236         seq_printf(s, "REQUESTS %d homeless %d\n",
 237                    atomic_read(&osdc->num_requests),
 238                    atomic_read(&osdc->num_homeless));
 239         for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
 240                 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
 241
 242                 dump_requests(s, osd);
 243         }
 244         dump_requests(s, &osdc->homeless_osd);
 245
 246         seq_puts(s, "LINGER REQUESTS\n");
 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_linger_requests(s, osd);
 251         }
 252         dump_linger_requests(s, &osdc->homeless_osd);
 253
 254         up_read(&osdc->lock);
 255         return 0;
 256 }
 257
 258 static int client_options_show(struct seq_file *s, void *p)
 259 {
 260         struct ceph_client *client = s->private;
 261         int ret;
 262
 263         ret = ceph_print_client_options(s, client);
 264         if (ret)
 265                 return ret;
 266
 267         seq_putc(s, '\n');
 268         return 0;
 269 }
 270
 271 CEPH_DEFINE_SHOW_FUNC(monmap_show)
 272 CEPH_DEFINE_SHOW_FUNC(osdmap_show)
 273 CEPH_DEFINE_SHOW_FUNC(monc_show)
 274 CEPH_DEFINE_SHOW_FUNC(osdc_show)
 275 CEPH_DEFINE_SHOW_FUNC(client_options_show)
 276
 277 int ceph_debugfs_init(void)
 278 {
 279         ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
 280         if (!ceph_debugfs_dir)
 281                 return -ENOMEM;
 282         return 0;
 283 }
 284
 285 void ceph_debugfs_cleanup(void)
 286 {
 287         debugfs_remove(ceph_debugfs_dir);
 288 }
 289
 290 int ceph_debugfs_client_init(struct ceph_client *client)
 291 {
 292         int ret = -ENOMEM;
 293         char name[80];
 294
 295         snprintf(name, sizeof(name), "%pU.client%lld", &client->fsid,
 296                  client->monc.auth->global_id);
 297
 298         dout("ceph_debugfs_client_init %p %s\n", client, name);
 299
 300         BUG_ON(client->debugfs_dir);
 301         client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
 302         if (!client->debugfs_dir)
 303                 goto out;
 304
 305         client->monc.debugfs_file = debugfs_create_file("monc",
 306                                                       0600,
 307                                                       client->debugfs_dir,
 308                                                       client,
 309                                                       &monc_show_fops);
 310         if (!client->monc.debugfs_file)
 311                 goto out;
 312
 313         client->osdc.debugfs_file = debugfs_create_file("osdc",
 314                                                       0600,
 315                                                       client->debugfs_dir,
 316                                                       client,
 317                                                       &osdc_show_fops);
 318         if (!client->osdc.debugfs_file)
 319                 goto out;
 320
 321         client->debugfs_monmap = debugfs_create_file("monmap",
 322                                         0600,
 323                                         client->debugfs_dir,
 324                                         client,
 325                                         &monmap_show_fops);
 326         if (!client->debugfs_monmap)
 327                 goto out;
 328
 329         client->debugfs_osdmap = debugfs_create_file("osdmap",
 330                                         0600,
 331                                         client->debugfs_dir,
 332                                         client,
 333                                         &osdmap_show_fops);
 334         if (!client->debugfs_osdmap)
 335                 goto out;
 336
 337         client->debugfs_options = debugfs_create_file("client_options",
 338                                         0600,
 339                                         client->debugfs_dir,
 340                                         client,
 341                                         &client_options_show_fops);
 342         if (!client->debugfs_options)
 343                 goto out;
 344
 345         return 0;
 346
 347 out:
 348         ceph_debugfs_client_cleanup(client);
 349         return ret;
 350 }
 351
 352 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 353 {
 354         dout("ceph_debugfs_client_cleanup %p\n", client);
 355         debugfs_remove(client->debugfs_options);
 356         debugfs_remove(client->debugfs_osdmap);
 357         debugfs_remove(client->debugfs_monmap);
 358         debugfs_remove(client->osdc.debugfs_file);
 359         debugfs_remove(client->monc.debugfs_file);
 360         debugfs_remove(client->debugfs_dir);
 361 }
 362
 363 #else  /* CONFIG_DEBUG_FS */
 364
 365 int ceph_debugfs_init(void)
 366 {
 367         return 0;
 368 }
 369
 370 void ceph_debugfs_cleanup(void)
 371 {
 372 }
 373
 374 int ceph_debugfs_client_init(struct ceph_client *client)
 375 {
 376         return 0;
 377 }
 378
 379 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 380 {
 381 }
 382
 383 #endif  /* CONFIG_DEBUG_FS */
 384
 385 EXPORT_SYMBOL(ceph_debugfs_init);
 386 EXPORT_SYMBOL(ceph_debugfs_cleanup);