fs/ceph/debugfs.c

   1 #include "ceph_debug.h"
   2
   3 #include <linux/device.h>
   4 #include <linux/module.h>
   5 #include <linux/ctype.h>
   6 #include <linux/debugfs.h>
   7 #include <linux/seq_file.h>
   8
   9 #include "super.h"
  10 #include "mds_client.h"
  11 #include "mon_client.h"
  12 #include "auth.h"
  13
  14 #ifdef CONFIG_DEBUG_FS
  15
  16 /*
  17  * Implement /sys/kernel/debug/ceph fun
  18  *
  19  * /sys/kernel/debug/ceph/client*  - an instance of the ceph client
  20  *      .../osdmap      - current osdmap
  21  *      .../mdsmap      - current mdsmap
  22  *      .../monmap      - current monmap
  23  *      .../osdc        - active osd requests
  24  *      .../mdsc        - active mds requests
  25  *      .../monc        - mon client state
  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                            pr_addr(&inst->addr.in_addr));
  49         }
  50         return 0;
  51 }
  52
  53 static int mdsmap_show(struct seq_file *s, void *p)
  54 {
  55         int i;
  56         struct ceph_client *client = s->private;
  57
  58         if (client->mdsc.mdsmap == NULL)
  59                 return 0;
  60         seq_printf(s, "epoch %d\n", client->mdsc.mdsmap->m_epoch);
  61         seq_printf(s, "root %d\n", client->mdsc.mdsmap->m_root);
  62         seq_printf(s, "session_timeout %d\n",
  63                        client->mdsc.mdsmap->m_session_timeout);
  64         seq_printf(s, "session_autoclose %d\n",
  65                        client->mdsc.mdsmap->m_session_autoclose);
  66         for (i = 0; i < client->mdsc.mdsmap->m_max_mds; i++) {
  67                 struct ceph_entity_addr *addr =
  68                         &client->mdsc.mdsmap->m_info[i].addr;
  69                 int state = client->mdsc.mdsmap->m_info[i].state;
  70
  71                 seq_printf(s, "\tmds%d\t%s\t(%s)\n", i, pr_addr(&addr->in_addr),
  72                                ceph_mds_state_name(state));
  73         }
  74         return 0;
  75 }
  76
  77 static int osdmap_show(struct seq_file *s, void *p)
  78 {
  79         int i;
  80         struct ceph_client *client = s->private;
  81
  82         if (client->osdc.osdmap == NULL)
  83                 return 0;
  84         seq_printf(s, "epoch %d\n", client->osdc.osdmap->epoch);
  85         seq_printf(s, "flags%s%s\n",
  86                    (client->osdc.osdmap->flags & CEPH_OSDMAP_NEARFULL) ?
  87                    " NEARFULL" : "",
  88                    (client->osdc.osdmap->flags & CEPH_OSDMAP_FULL) ?
  89                    " FULL" : "");
  90         for (i = 0; i < client->osdc.osdmap->num_pools; i++) {
  91                 struct ceph_pg_pool_info *pool =
  92                         &client->osdc.osdmap->pg_pool[i];
  93                 seq_printf(s, "pg_pool %d pg_num %d / %d, lpg_num %d / %d\n",
  94                            i, pool->v.pg_num, pool->pg_num_mask,
  95                            pool->v.lpg_num, pool->lpg_num_mask);
  96         }
  97         for (i = 0; i < client->osdc.osdmap->max_osd; i++) {
  98                 struct ceph_entity_addr *addr =
  99                         &client->osdc.osdmap->osd_addr[i];
 100                 int state = client->osdc.osdmap->osd_state[i];
 101                 char sb[64];
 102
 103                 seq_printf(s, "\tosd%d\t%s\t%3d%%\t(%s)\n",
 104                            i, pr_addr(&addr->in_addr),
 105                            ((client->osdc.osdmap->osd_weight[i]*100) >> 16),
 106                            ceph_osdmap_state_str(sb, sizeof(sb), state));
 107         }
 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_statfs_request *req;
 115         u64 nexttid = 0;
 116         int got;
 117         struct ceph_mon_client *monc = &client->monc;
 118
 119         mutex_lock(&monc->mutex);
 120
 121         if (monc->have_mdsmap)
 122                 seq_printf(s, "have mdsmap %u\n", (unsigned)monc->have_mdsmap);
 123         if (monc->have_osdmap)
 124                 seq_printf(s, "have osdmap %u\n", (unsigned)monc->have_osdmap);
 125         if (monc->want_next_osdmap)
 126                 seq_printf(s, "want next osdmap\n");
 127
 128         while (nexttid < monc->last_tid) {
 129                 got = radix_tree_gang_lookup(&monc->statfs_request_tree,
 130                                              (void **)&req, nexttid, 1);
 131                 if (got == 0)
 132                         break;
 133                 nexttid = req->tid + 1;
 134
 135                 seq_printf(s, "%lld statfs\n", req->tid);
 136         }
 137         mutex_unlock(&monc->mutex);
 138
 139         return 0;
 140 }
 141
 142 static int mdsc_show(struct seq_file *s, void *p)
 143 {
 144         struct ceph_client *client = s->private;
 145         struct ceph_mds_request *req;
 146         u64 nexttid = 0;
 147         int got;
 148         struct ceph_mds_client *mdsc = &client->mdsc;
 149         int pathlen;
 150         u64 pathbase;
 151         char *path;
 152
 153         mutex_lock(&mdsc->mutex);
 154         while (nexttid < mdsc->last_tid) {
 155                 got = radix_tree_gang_lookup(&mdsc->request_tree,
 156                                              (void **)&req, nexttid, 1);
 157                 if (got == 0)
 158                         break;
 159                 nexttid = req->r_tid + 1;
 160
 161                 if (req->r_request)
 162                         seq_printf(s, "%lld\tmds%d\t", req->r_tid, req->r_mds);
 163                 else
 164                         seq_printf(s, "%lld\t(no request)\t", req->r_tid);
 165
 166                 seq_printf(s, "%s", ceph_mds_op_name(req->r_op));
 167
 168                 if (req->r_got_unsafe)
 169                         seq_printf(s, "\t(unsafe)");
 170                 else
 171                         seq_printf(s, "\t");
 172
 173                 if (req->r_inode) {
 174                         seq_printf(s, " #%llx", ceph_ino(req->r_inode));
 175                 } else if (req->r_dentry) {
 176                         path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
 177                                                     &pathbase, 0);
 178                         spin_lock(&req->r_dentry->d_lock);
 179                         seq_printf(s, " #%llx/%.*s (%s)",
 180                                    ceph_ino(req->r_dentry->d_parent->d_inode),
 181                                    req->r_dentry->d_name.len,
 182                                    req->r_dentry->d_name.name,
 183                                    path ? path : "");
 184                         spin_unlock(&req->r_dentry->d_lock);
 185                         kfree(path);
 186                 } else if (req->r_path1) {
 187                         seq_printf(s, " #%llx/%s", req->r_ino1.ino,
 188                                    req->r_path1);
 189                 }
 190
 191                 if (req->r_old_dentry) {
 192                         path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
 193                                                     &pathbase, 0);
 194                         spin_lock(&req->r_old_dentry->d_lock);
 195                         seq_printf(s, " #%llx/%.*s (%s)",
 196                            ceph_ino(req->r_old_dentry->d_parent->d_inode),
 197                                    req->r_old_dentry->d_name.len,
 198                                    req->r_old_dentry->d_name.name,
 199                                    path ? path : "");
 200                         spin_unlock(&req->r_old_dentry->d_lock);
 201                         kfree(path);
 202                 } else if (req->r_path2) {
 203                         if (req->r_ino2.ino)
 204                                 seq_printf(s, " #%llx/%s", req->r_ino2.ino,
 205                                            req->r_path2);
 206                         else
 207                                 seq_printf(s, " %s", req->r_path2);
 208                 }
 209
 210                 seq_printf(s, "\n");
 211         }
 212         mutex_unlock(&mdsc->mutex);
 213
 214         return 0;
 215 }
 216
 217 static int osdc_show(struct seq_file *s, void *pp)
 218 {
 219         struct ceph_client *client = s->private;
 220         struct ceph_osd_client *osdc = &client->osdc;
 221         struct rb_node *p;
 222
 223         mutex_lock(&osdc->request_mutex);
 224         for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
 225                 struct ceph_osd_request *req;
 226                 struct ceph_osd_request_head *head;
 227                 struct ceph_osd_op *op;
 228                 int num_ops;
 229                 int opcode, olen;
 230                 int i;
 231
 232                 req = rb_entry(p, struct ceph_osd_request, r_node);
 233
 234                 seq_printf(s, "%lld\tosd%d\t", req->r_tid,
 235                            req->r_osd ? req->r_osd->o_osd : -1);
 236
 237                 head = req->r_request->front.iov_base;
 238                 op = (void *)(head + 1);
 239
 240                 num_ops = le16_to_cpu(head->num_ops);
 241                 olen = le32_to_cpu(head->object_len);
 242                 seq_printf(s, "%.*s", olen,
 243                            (const char *)(head->ops + num_ops));
 244
 245                 if (req->r_reassert_version.epoch)
 246                         seq_printf(s, "\t%u'%llu",
 247                            (unsigned)le32_to_cpu(req->r_reassert_version.epoch),
 248                            le64_to_cpu(req->r_reassert_version.version));
 249                 else
 250                         seq_printf(s, "\t");
 251
 252                 for (i = 0; i < num_ops; i++) {
 253                         opcode = le16_to_cpu(op->op);
 254                         seq_printf(s, "\t%s", ceph_osd_op_name(opcode));
 255                         op++;
 256                 }
 257
 258                 seq_printf(s, "\n");
 259         }
 260         mutex_unlock(&osdc->request_mutex);
 261         return 0;
 262 }
 263
 264 static int caps_show(struct seq_file *s, void *p)
 265 {
 266         struct ceph_client *client = p;
 267         int total, avail, used, reserved;
 268
 269         ceph_reservation_status(client, &total, &avail, &used, &reserved);
 270         seq_printf(s, "total\t\t%d\n"
 271                       "avail\t\t%d\n"
 272                       "used\t\t%d\n"
 273                       "reserved\t%d\n",
 274                    total, avail, used, reserved);
 275         return 0;
 276 }
 277
 278 static int dentry_lru_show(struct seq_file *s, void *ptr)
 279 {
 280         struct ceph_client *client = s->private;
 281         struct ceph_mds_client *mdsc = &client->mdsc;
 282         struct ceph_dentry_info *di;
 283
 284         spin_lock(&mdsc->dentry_lru_lock);
 285         list_for_each_entry(di, &mdsc->dentry_lru, lru) {
 286                 struct dentry *dentry = di->dentry;
 287                 seq_printf(s, "%p %p\t%.*s\n",
 288                            di, dentry, dentry->d_name.len, dentry->d_name.name);
 289         }
 290         spin_unlock(&mdsc->dentry_lru_lock);
 291
 292         return 0;
 293 }
 294
 295 #define DEFINE_SHOW_FUNC(name)                                          \
 296 static int name##_open(struct inode *inode, struct file *file)          \
 297 {                                                                       \
 298         struct seq_file *sf;                                            \
 299         int ret;                                                        \
 300                                                                         \
 301         ret = single_open(file, name, NULL);                            \
 302         sf = file->private_data;                                        \
 303         sf->private = inode->i_private;                                 \
 304         return ret;                                                     \
 305 }                                                                       \
 306                                                                         \
 307 static const struct file_operations name##_fops = {                     \
 308         .open           = name##_open,                                  \
 309         .read           = seq_read,                                     \
 310         .llseek         = seq_lseek,                                    \
 311         .release        = single_release,                               \
 312 };
 313
 314 DEFINE_SHOW_FUNC(monmap_show)
 315 DEFINE_SHOW_FUNC(mdsmap_show)
 316 DEFINE_SHOW_FUNC(osdmap_show)
 317 DEFINE_SHOW_FUNC(monc_show)
 318 DEFINE_SHOW_FUNC(mdsc_show)
 319 DEFINE_SHOW_FUNC(osdc_show)
 320 DEFINE_SHOW_FUNC(dentry_lru_show)
 321 DEFINE_SHOW_FUNC(caps_show)
 322
 323 static int congestion_kb_set(void *data, u64 val)
 324 {
 325         struct ceph_client *client = (struct ceph_client *)data;
 326
 327         if (client)
 328                 client->mount_args->congestion_kb = (int)val;
 329
 330         return 0;
 331 }
 332
 333 static int congestion_kb_get(void *data, u64 *val)
 334 {
 335         struct ceph_client *client = (struct ceph_client *)data;
 336
 337         if (client)
 338                 *val = (u64)client->mount_args->congestion_kb;
 339
 340         return 0;
 341 }
 342
 343
 344 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
 345                         congestion_kb_set, "%llu\n");
 346
 347 int __init ceph_debugfs_init(void)
 348 {
 349         ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
 350         if (!ceph_debugfs_dir)
 351                 return -ENOMEM;
 352         return 0;
 353 }
 354
 355 void ceph_debugfs_cleanup(void)
 356 {
 357         debugfs_remove(ceph_debugfs_dir);
 358 }
 359
 360 int ceph_debugfs_client_init(struct ceph_client *client)
 361 {
 362         int ret = 0;
 363         char name[80];
 364
 365         snprintf(name, sizeof(name), FSID_FORMAT ".client%lld",
 366                  PR_FSID(&client->fsid), client->monc.auth->global_id);
 367
 368         client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
 369         if (!client->debugfs_dir)
 370                 goto out;
 371
 372         client->monc.debugfs_file = debugfs_create_file("monc",
 373                                                       0600,
 374                                                       client->debugfs_dir,
 375                                                       client,
 376                                                       &monc_show_fops);
 377         if (!client->monc.debugfs_file)
 378                 goto out;
 379
 380         client->mdsc.debugfs_file = debugfs_create_file("mdsc",
 381                                                       0600,
 382                                                       client->debugfs_dir,
 383                                                       client,
 384                                                       &mdsc_show_fops);
 385         if (!client->mdsc.debugfs_file)
 386                 goto out;
 387
 388         client->osdc.debugfs_file = debugfs_create_file("osdc",
 389                                                       0600,
 390                                                       client->debugfs_dir,
 391                                                       client,
 392                                                       &osdc_show_fops);
 393         if (!client->osdc.debugfs_file)
 394                 goto out;
 395
 396         client->debugfs_monmap = debugfs_create_file("monmap",
 397                                         0600,
 398                                         client->debugfs_dir,
 399                                         client,
 400                                         &monmap_show_fops);
 401         if (!client->debugfs_monmap)
 402                 goto out;
 403
 404         client->debugfs_mdsmap = debugfs_create_file("mdsmap",
 405                                         0600,
 406                                         client->debugfs_dir,
 407                                         client,
 408                                         &mdsmap_show_fops);
 409         if (!client->debugfs_mdsmap)
 410                 goto out;
 411
 412         client->debugfs_osdmap = debugfs_create_file("osdmap",
 413                                         0600,
 414                                         client->debugfs_dir,
 415                                         client,
 416                                         &osdmap_show_fops);
 417         if (!client->debugfs_osdmap)
 418                 goto out;
 419
 420         client->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
 421                                         0600,
 422                                         client->debugfs_dir,
 423                                         client,
 424                                         &dentry_lru_show_fops);
 425         if (!client->debugfs_dentry_lru)
 426                 goto out;
 427
 428         client->debugfs_caps = debugfs_create_file("caps",
 429                                                    0400,
 430                                                    client->debugfs_dir,
 431                                                    client,
 432                                                    &caps_show_fops);
 433         if (!client->debugfs_caps)
 434                 goto out;
 435
 436         client->debugfs_congestion_kb = debugfs_create_file("writeback_congestion_kb",
 437                                                    0600,
 438                                                    client->debugfs_dir,
 439                                                    client,
 440                                                    &congestion_kb_fops);
 441         if (!client->debugfs_congestion_kb)
 442                 goto out;
 443
 444         sprintf(name, "../../bdi/%s", dev_name(client->sb->s_bdi->dev));
 445         client->debugfs_bdi = debugfs_create_symlink("bdi", client->debugfs_dir,
 446                                                      name);
 447
 448         return 0;
 449
 450 out:
 451         ceph_debugfs_client_cleanup(client);
 452         return ret;
 453 }
 454
 455 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 456 {
 457         debugfs_remove(client->debugfs_bdi);
 458         debugfs_remove(client->debugfs_caps);
 459         debugfs_remove(client->debugfs_dentry_lru);
 460         debugfs_remove(client->debugfs_osdmap);
 461         debugfs_remove(client->debugfs_mdsmap);
 462         debugfs_remove(client->debugfs_monmap);
 463         debugfs_remove(client->osdc.debugfs_file);
 464         debugfs_remove(client->mdsc.debugfs_file);
 465         debugfs_remove(client->monc.debugfs_file);
 466         debugfs_remove(client->debugfs_congestion_kb);
 467         debugfs_remove(client->debugfs_dir);
 468 }
 469
 470 #else  // CONFIG_DEBUG_FS
 471
 472 int __init ceph_debugfs_init(void)
 473 {
 474         return 0;
 475 }
 476
 477 void ceph_debugfs_cleanup(void)
 478 {
 479 }
 480
 481 int ceph_debugfs_client_init(struct ceph_client *client)
 482 {
 483         return 0;
 484 }
 485
 486 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 487 {
 488 }
 489
 490 #endif  // CONFIG_DEBUG_FS