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         seq_printf(s, "fs_cluster_id %d\n", monc->fs_cluster_id);
 132
 133         for (rp = rb_first(&monc->generic_request_tree); rp; rp = rb_next(rp)) {
 134                 __u16 op;
 135                 req = rb_entry(rp, struct ceph_mon_generic_request, node);
 136                 op = le16_to_cpu(req->request->hdr.type);
 137                 if (op == CEPH_MSG_STATFS)
 138                         seq_printf(s, "%llu statfs\n", req->tid);
 139                 else if (op == CEPH_MSG_MON_GET_VERSION)
 140                         seq_printf(s, "%llu mon_get_version", req->tid);
 141                 else
 142                         seq_printf(s, "%llu unknown\n", req->tid);
 143         }
 144
 145         mutex_unlock(&monc->mutex);
 146         return 0;
 147 }
 148
 149 static void dump_target(struct seq_file *s, struct ceph_osd_request_target *t)
 150 {
 151         int i;
 152
 153         seq_printf(s, "osd%d\t%llu.%x\t[", t->osd, t->pgid.pool, t->pgid.seed);
 154         for (i = 0; i < t->up.size; i++)
 155                 seq_printf(s, "%s%d", (!i ? "" : ","), t->up.osds[i]);
 156         seq_printf(s, "]/%d\t[", t->up.primary);
 157         for (i = 0; i < t->acting.size; i++)
 158                 seq_printf(s, "%s%d", (!i ? "" : ","), t->acting.osds[i]);
 159         seq_printf(s, "]/%d\t%*pE\t0x%x", t->acting.primary,
 160                    t->target_oid.name_len, t->target_oid.name, t->flags);
 161         if (t->paused)
 162                 seq_puts(s, "\tP");
 163 }
 164
 165 static void dump_request(struct seq_file *s, struct ceph_osd_request *req)
 166 {
 167         int i;
 168
 169         seq_printf(s, "%llu\t", req->r_tid);
 170         dump_target(s, &req->r_t);
 171
 172         seq_printf(s, "\t%d\t%u'%llu", req->r_attempts,
 173                    le32_to_cpu(req->r_replay_version.epoch),
 174                    le64_to_cpu(req->r_replay_version.version));
 175
 176         for (i = 0; i < req->r_num_ops; i++) {
 177                 struct ceph_osd_req_op *op = &req->r_ops[i];
 178
 179                 seq_printf(s, "%s%s", (i == 0 ? "\t" : ","),
 180                            ceph_osd_op_name(op->op));
 181                 if (op->op == CEPH_OSD_OP_WATCH)
 182                         seq_printf(s, "-%s",
 183                                    ceph_osd_watch_op_name(op->watch.op));
 184         }
 185
 186         seq_putc(s, '\n');
 187 }
 188
 189 static void dump_requests(struct seq_file *s, struct ceph_osd *osd)
 190 {
 191         struct rb_node *n;
 192
 193         mutex_lock(&osd->lock);
 194         for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
 195                 struct ceph_osd_request *req =
 196                     rb_entry(n, struct ceph_osd_request, r_node);
 197
 198                 dump_request(s, req);
 199         }
 200
 201         mutex_unlock(&osd->lock);
 202 }
 203
 204 static void dump_linger_request(struct seq_file *s,
 205                                 struct ceph_osd_linger_request *lreq)
 206 {
 207         seq_printf(s, "%llu\t", lreq->linger_id);
 208         dump_target(s, &lreq->t);
 209
 210         seq_printf(s, "\t%u\t%s%s/%d\n", lreq->register_gen,
 211                    lreq->is_watch ? "W" : "N", lreq->committed ? "C" : "",
 212                    lreq->last_error);
 213 }
 214
 215 static void dump_linger_requests(struct seq_file *s, struct ceph_osd *osd)
 216 {
 217         struct rb_node *n;
 218
 219         mutex_lock(&osd->lock);
 220         for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
 221                 struct ceph_osd_linger_request *lreq =
 222                     rb_entry(n, struct ceph_osd_linger_request, node);
 223
 224                 dump_linger_request(s, lreq);
 225         }
 226
 227         mutex_unlock(&osd->lock);
 228 }
 229
 230 static int osdc_show(struct seq_file *s, void *pp)
 231 {
 232         struct ceph_client *client = s->private;
 233         struct ceph_osd_client *osdc = &client->osdc;
 234         struct rb_node *n;
 235
 236         down_read(&osdc->lock);
 237         seq_printf(s, "REQUESTS %d homeless %d\n",
 238                    atomic_read(&osdc->num_requests),
 239                    atomic_read(&osdc->num_homeless));
 240         for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
 241                 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
 242
 243                 dump_requests(s, osd);
 244         }
 245         dump_requests(s, &osdc->homeless_osd);
 246
 247         seq_puts(s, "LINGER REQUESTS\n");
 248         for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
 249                 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
 250
 251                 dump_linger_requests(s, osd);
 252         }
 253         dump_linger_requests(s, &osdc->homeless_osd);
 254
 255         up_read(&osdc->lock);
 256         return 0;
 257 }
 258
 259 static int client_options_show(struct seq_file *s, void *p)
 260 {
 261         struct ceph_client *client = s->private;
 262         int ret;
 263
 264         ret = ceph_print_client_options(s, client);
 265         if (ret)
 266                 return ret;
 267
 268         seq_putc(s, '\n');
 269         return 0;
 270 }
 271
 272 CEPH_DEFINE_SHOW_FUNC(monmap_show)
 273 CEPH_DEFINE_SHOW_FUNC(osdmap_show)
 274 CEPH_DEFINE_SHOW_FUNC(monc_show)
 275 CEPH_DEFINE_SHOW_FUNC(osdc_show)
 276 CEPH_DEFINE_SHOW_FUNC(client_options_show)
 277
 278 int ceph_debugfs_init(void)
 279 {
 280         ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
 281         if (!ceph_debugfs_dir)
 282                 return -ENOMEM;
 283         return 0;
 284 }
 285
 286 void ceph_debugfs_cleanup(void)
 287 {
 288         debugfs_remove(ceph_debugfs_dir);
 289 }
 290
 291 int ceph_debugfs_client_init(struct ceph_client *client)
 292 {
 293         int ret = -ENOMEM;
 294         char name[80];
 295
 296         snprintf(name, sizeof(name), "%pU.client%lld", &client->fsid,
 297                  client->monc.auth->global_id);
 298
 299         dout("ceph_debugfs_client_init %p %s\n", client, name);
 300
 301         BUG_ON(client->debugfs_dir);
 302         client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
 303         if (!client->debugfs_dir)
 304                 goto out;
 305
 306         client->monc.debugfs_file = debugfs_create_file("monc",
 307                                                       0600,
 308                                                       client->debugfs_dir,
 309                                                       client,
 310                                                       &monc_show_fops);
 311         if (!client->monc.debugfs_file)
 312                 goto out;
 313
 314         client->osdc.debugfs_file = debugfs_create_file("osdc",
 315                                                       0600,
 316                                                       client->debugfs_dir,
 317                                                       client,
 318                                                       &osdc_show_fops);
 319         if (!client->osdc.debugfs_file)
 320                 goto out;
 321
 322         client->debugfs_monmap = debugfs_create_file("monmap",
 323                                         0600,
 324                                         client->debugfs_dir,
 325                                         client,
 326                                         &monmap_show_fops);
 327         if (!client->debugfs_monmap)
 328                 goto out;
 329
 330         client->debugfs_osdmap = debugfs_create_file("osdmap",
 331                                         0600,
 332                                         client->debugfs_dir,
 333                                         client,
 334                                         &osdmap_show_fops);
 335         if (!client->debugfs_osdmap)
 336                 goto out;
 337
 338         client->debugfs_options = debugfs_create_file("client_options",
 339                                         0600,
 340                                         client->debugfs_dir,
 341                                         client,
 342                                         &client_options_show_fops);
 343         if (!client->debugfs_options)
 344                 goto out;
 345
 346         return 0;
 347
 348 out:
 349         ceph_debugfs_client_cleanup(client);
 350         return ret;
 351 }
 352
 353 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 354 {
 355         dout("ceph_debugfs_client_cleanup %p\n", client);
 356         debugfs_remove(client->debugfs_options);
 357         debugfs_remove(client->debugfs_osdmap);
 358         debugfs_remove(client->debugfs_monmap);
 359         debugfs_remove(client->osdc.debugfs_file);
 360         debugfs_remove(client->monc.debugfs_file);
 361         debugfs_remove(client->debugfs_dir);
 362 }
 363
 364 #else  /* CONFIG_DEBUG_FS */
 365
 366 int ceph_debugfs_init(void)
 367 {
 368         return 0;
 369 }
 370
 371 void ceph_debugfs_cleanup(void)
 372 {
 373 }
 374
 375 int ceph_debugfs_client_init(struct ceph_client *client)
 376 {
 377         return 0;
 378 }
 379
 380 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 381 {
 382 }
 383
 384 #endif  /* CONFIG_DEBUG_FS */
 385
 386 EXPORT_SYMBOL(ceph_debugfs_init);
 387 EXPORT_SYMBOL(ceph_debugfs_cleanup);