fs/ceph/debugfs.c

   1 #include "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 "super.h"
  11 #include "mds_client.h"
  12 #include "mon_client.h"
  13 #include "auth.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  *      .../mdsmap      - current mdsmap
  23  *      .../monmap      - current monmap
  24  *      .../osdc        - active osd requests
  25  *      .../mdsc        - active mds requests
  26  *      .../monc        - mon client state
  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                            pr_addr(&inst->addr.in_addr));
  50         }
  51         return 0;
  52 }
  53
  54 static int mdsmap_show(struct seq_file *s, void *p)
  55 {
  56         int i;
  57         struct ceph_client *client = s->private;
  58
  59         if (client->mdsc.mdsmap == NULL)
  60                 return 0;
  61         seq_printf(s, "epoch %d\n", client->mdsc.mdsmap->m_epoch);
  62         seq_printf(s, "root %d\n", client->mdsc.mdsmap->m_root);
  63         seq_printf(s, "session_timeout %d\n",
  64                        client->mdsc.mdsmap->m_session_timeout);
  65         seq_printf(s, "session_autoclose %d\n",
  66                        client->mdsc.mdsmap->m_session_autoclose);
  67         for (i = 0; i < client->mdsc.mdsmap->m_max_mds; i++) {
  68                 struct ceph_entity_addr *addr =
  69                         &client->mdsc.mdsmap->m_info[i].addr;
  70                 int state = client->mdsc.mdsmap->m_info[i].state;
  71
  72                 seq_printf(s, "\tmds%d\t%s\t(%s)\n", i, pr_addr(&addr->in_addr),
  73                                ceph_mds_state_name(state));
  74         }
  75         return 0;
  76 }
  77
  78 static int osdmap_show(struct seq_file *s, void *p)
  79 {
  80         int i;
  81         struct ceph_client *client = s->private;
  82         struct rb_node *n;
  83
  84         if (client->osdc.osdmap == NULL)
  85                 return 0;
  86         seq_printf(s, "epoch %d\n", client->osdc.osdmap->epoch);
  87         seq_printf(s, "flags%s%s\n",
  88                    (client->osdc.osdmap->flags & CEPH_OSDMAP_NEARFULL) ?
  89                    " NEARFULL" : "",
  90                    (client->osdc.osdmap->flags & CEPH_OSDMAP_FULL) ?
  91                    " FULL" : "");
  92         for (n = rb_first(&client->osdc.osdmap->pg_pools); n; n = rb_next(n)) {
  93                 struct ceph_pg_pool_info *pool =
  94                         rb_entry(n, struct ceph_pg_pool_info, node);
  95                 seq_printf(s, "pg_pool %d pg_num %d / %d, lpg_num %d / %d\n",
  96                            pool->id, pool->v.pg_num, pool->pg_num_mask,
  97                            pool->v.lpg_num, pool->lpg_num_mask);
  98         }
  99         for (i = 0; i < client->osdc.osdmap->max_osd; i++) {
 100                 struct ceph_entity_addr *addr =
 101                         &client->osdc.osdmap->osd_addr[i];
 102                 int state = client->osdc.osdmap->osd_state[i];
 103                 char sb[64];
 104
 105                 seq_printf(s, "\tosd%d\t%s\t%3d%%\t(%s)\n",
 106                            i, pr_addr(&addr->in_addr),
 107                            ((client->osdc.osdmap->osd_weight[i]*100) >> 16),
 108                            ceph_osdmap_state_str(sb, sizeof(sb), state));
 109         }
 110         return 0;
 111 }
 112
 113 static int monc_show(struct seq_file *s, void *p)
 114 {
 115         struct ceph_client *client = s->private;
 116         struct ceph_mon_generic_request *req;
 117         struct ceph_mon_client *monc = &client->monc;
 118         struct rb_node *rp;
 119
 120         mutex_lock(&monc->mutex);
 121
 122         if (monc->have_mdsmap)
 123                 seq_printf(s, "have mdsmap %u\n", (unsigned)monc->have_mdsmap);
 124         if (monc->have_osdmap)
 125                 seq_printf(s, "have osdmap %u\n", (unsigned)monc->have_osdmap);
 126         if (monc->want_next_osdmap)
 127                 seq_printf(s, "want next osdmap\n");
 128
 129         for (rp = rb_first(&monc->generic_request_tree); rp; rp = rb_next(rp)) {
 130                 __u16 op;
 131                 req = rb_entry(rp, struct ceph_mon_generic_request, node);
 132                 op = le16_to_cpu(req->request->hdr.type);
 133                 if (op == CEPH_MSG_STATFS)
 134                         seq_printf(s, "%lld statfs\n", req->tid);
 135                 else
 136                         seq_printf(s, "%lld unknown\n", req->tid);
 137         }
 138
 139         mutex_unlock(&monc->mutex);
 140         return 0;
 141 }
 142
 143 static int mdsc_show(struct seq_file *s, void *p)
 144 {
 145         struct ceph_client *client = s->private;
 146         struct ceph_mds_client *mdsc = &client->mdsc;
 147         struct ceph_mds_request *req;
 148         struct rb_node *rp;
 149         int pathlen;
 150         u64 pathbase;
 151         char *path;
 152
 153         mutex_lock(&mdsc->mutex);
 154         for (rp = rb_first(&mdsc->request_tree); rp; rp = rb_next(rp)) {
 155                 req = rb_entry(rp, struct ceph_mds_request, r_node);
 156
 157                 if (req->r_request)
 158                         seq_printf(s, "%lld\tmds%d\t", req->r_tid, req->r_mds);
 159                 else
 160                         seq_printf(s, "%lld\t(no request)\t", req->r_tid);
 161
 162                 seq_printf(s, "%s", ceph_mds_op_name(req->r_op));
 163
 164                 if (req->r_got_unsafe)
 165                         seq_printf(s, "\t(unsafe)");
 166                 else
 167                         seq_printf(s, "\t");
 168
 169                 if (req->r_inode) {
 170                         seq_printf(s, " #%llx", ceph_ino(req->r_inode));
 171                 } else if (req->r_dentry) {
 172                         path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
 173                                                     &pathbase, 0);
 174                         if (IS_ERR(path))
 175                                 path = NULL;
 176                         spin_lock(&req->r_dentry->d_lock);
 177                         seq_printf(s, " #%llx/%.*s (%s)",
 178                                    ceph_ino(req->r_dentry->d_parent->d_inode),
 179                                    req->r_dentry->d_name.len,
 180                                    req->r_dentry->d_name.name,
 181                                    path ? path : "");
 182                         spin_unlock(&req->r_dentry->d_lock);
 183                         kfree(path);
 184                 } else if (req->r_path1) {
 185                         seq_printf(s, " #%llx/%s", req->r_ino1.ino,
 186                                    req->r_path1);
 187                 }
 188
 189                 if (req->r_old_dentry) {
 190                         path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
 191                                                     &pathbase, 0);
 192                         if (IS_ERR(path))
 193                                 path = NULL;
 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%d.%x\t", req->r_tid,
 235                            req->r_osd ? req->r_osd->o_osd : -1,
 236                            le32_to_cpu(req->r_pgid.pool),
 237                            le16_to_cpu(req->r_pgid.ps));
 238
 239                 head = req->r_request->front.iov_base;
 240                 op = (void *)(head + 1);
 241
 242                 num_ops = le16_to_cpu(head->num_ops);
 243                 olen = le32_to_cpu(head->object_len);
 244                 seq_printf(s, "%.*s", olen,
 245                            (const char *)(head->ops + num_ops));
 246
 247                 if (req->r_reassert_version.epoch)
 248                         seq_printf(s, "\t%u'%llu",
 249                            (unsigned)le32_to_cpu(req->r_reassert_version.epoch),
 250                            le64_to_cpu(req->r_reassert_version.version));
 251                 else
 252                         seq_printf(s, "\t");
 253
 254                 for (i = 0; i < num_ops; i++) {
 255                         opcode = le16_to_cpu(op->op);
 256                         seq_printf(s, "\t%s", ceph_osd_op_name(opcode));
 257                         op++;
 258                 }
 259
 260                 seq_printf(s, "\n");
 261         }
 262         mutex_unlock(&osdc->request_mutex);
 263         return 0;
 264 }
 265
 266 static int caps_show(struct seq_file *s, void *p)
 267 {
 268         struct ceph_client *client = s->private;
 269         int total, avail, used, reserved, min;
 270
 271         ceph_reservation_status(client, &total, &avail, &used, &reserved, &min);
 272         seq_printf(s, "total\t\t%d\n"
 273                    "avail\t\t%d\n"
 274                    "used\t\t%d\n"
 275                    "reserved\t%d\n"
 276                    "min\t%d\n",
 277                    total, avail, used, reserved, min);
 278         return 0;
 279 }
 280
 281 static int dentry_lru_show(struct seq_file *s, void *ptr)
 282 {
 283         struct ceph_client *client = s->private;
 284         struct ceph_mds_client *mdsc = &client->mdsc;
 285         struct ceph_dentry_info *di;
 286
 287         spin_lock(&mdsc->dentry_lru_lock);
 288         list_for_each_entry(di, &mdsc->dentry_lru, lru) {
 289                 struct dentry *dentry = di->dentry;
 290                 seq_printf(s, "%p %p\t%.*s\n",
 291                            di, dentry, dentry->d_name.len, dentry->d_name.name);
 292         }
 293         spin_unlock(&mdsc->dentry_lru_lock);
 294
 295         return 0;
 296 }
 297
 298 #define DEFINE_SHOW_FUNC(name)                                          \
 299 static int name##_open(struct inode *inode, struct file *file)          \
 300 {                                                                       \
 301         struct seq_file *sf;                                            \
 302         int ret;                                                        \
 303                                                                         \
 304         ret = single_open(file, name, NULL);                            \
 305         sf = file->private_data;                                        \
 306         sf->private = inode->i_private;                                 \
 307         return ret;                                                     \
 308 }                                                                       \
 309                                                                         \
 310 static const struct file_operations name##_fops = {                     \
 311         .open           = name##_open,                                  \
 312         .read           = seq_read,                                     \
 313         .llseek         = seq_lseek,                                    \
 314         .release        = single_release,                               \
 315 };
 316
 317 DEFINE_SHOW_FUNC(monmap_show)
 318 DEFINE_SHOW_FUNC(mdsmap_show)
 319 DEFINE_SHOW_FUNC(osdmap_show)
 320 DEFINE_SHOW_FUNC(monc_show)
 321 DEFINE_SHOW_FUNC(mdsc_show)
 322 DEFINE_SHOW_FUNC(osdc_show)
 323 DEFINE_SHOW_FUNC(dentry_lru_show)
 324 DEFINE_SHOW_FUNC(caps_show)
 325
 326 static int congestion_kb_set(void *data, u64 val)
 327 {
 328         struct ceph_client *client = (struct ceph_client *)data;
 329
 330         if (client)
 331                 client->mount_args->congestion_kb = (int)val;
 332
 333         return 0;
 334 }
 335
 336 static int congestion_kb_get(void *data, u64 *val)
 337 {
 338         struct ceph_client *client = (struct ceph_client *)data;
 339
 340         if (client)
 341                 *val = (u64)client->mount_args->congestion_kb;
 342
 343         return 0;
 344 }
 345
 346
 347 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
 348                         congestion_kb_set, "%llu\n");
 349
 350 int __init ceph_debugfs_init(void)
 351 {
 352         ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
 353         if (!ceph_debugfs_dir)
 354                 return -ENOMEM;
 355         return 0;
 356 }
 357
 358 void ceph_debugfs_cleanup(void)
 359 {
 360         debugfs_remove(ceph_debugfs_dir);
 361 }
 362
 363 int ceph_debugfs_client_init(struct ceph_client *client)
 364 {
 365         int ret = 0;
 366         char name[80];
 367
 368         snprintf(name, sizeof(name), "%pU.client%lld", &client->fsid,
 369                  client->monc.auth->global_id);
 370
 371         client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
 372         if (!client->debugfs_dir)
 373                 goto out;
 374
 375         client->monc.debugfs_file = debugfs_create_file("monc",
 376                                                       0600,
 377                                                       client->debugfs_dir,
 378                                                       client,
 379                                                       &monc_show_fops);
 380         if (!client->monc.debugfs_file)
 381                 goto out;
 382
 383         client->mdsc.debugfs_file = debugfs_create_file("mdsc",
 384                                                       0600,
 385                                                       client->debugfs_dir,
 386                                                       client,
 387                                                       &mdsc_show_fops);
 388         if (!client->mdsc.debugfs_file)
 389                 goto out;
 390
 391         client->osdc.debugfs_file = debugfs_create_file("osdc",
 392                                                       0600,
 393                                                       client->debugfs_dir,
 394                                                       client,
 395                                                       &osdc_show_fops);
 396         if (!client->osdc.debugfs_file)
 397                 goto out;
 398
 399         client->debugfs_monmap = debugfs_create_file("monmap",
 400                                         0600,
 401                                         client->debugfs_dir,
 402                                         client,
 403                                         &monmap_show_fops);
 404         if (!client->debugfs_monmap)
 405                 goto out;
 406
 407         client->debugfs_mdsmap = debugfs_create_file("mdsmap",
 408                                         0600,
 409                                         client->debugfs_dir,
 410                                         client,
 411                                         &mdsmap_show_fops);
 412         if (!client->debugfs_mdsmap)
 413                 goto out;
 414
 415         client->debugfs_osdmap = debugfs_create_file("osdmap",
 416                                         0600,
 417                                         client->debugfs_dir,
 418                                         client,
 419                                         &osdmap_show_fops);
 420         if (!client->debugfs_osdmap)
 421                 goto out;
 422
 423         client->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
 424                                         0600,
 425                                         client->debugfs_dir,
 426                                         client,
 427                                         &dentry_lru_show_fops);
 428         if (!client->debugfs_dentry_lru)
 429                 goto out;
 430
 431         client->debugfs_caps = debugfs_create_file("caps",
 432                                                    0400,
 433                                                    client->debugfs_dir,
 434                                                    client,
 435                                                    &caps_show_fops);
 436         if (!client->debugfs_caps)
 437                 goto out;
 438
 439         client->debugfs_congestion_kb =
 440                 debugfs_create_file("writeback_congestion_kb",
 441                                     0600,
 442                                     client->debugfs_dir,
 443                                     client,
 444                                     &congestion_kb_fops);
 445         if (!client->debugfs_congestion_kb)
 446                 goto out;
 447
 448         sprintf(name, "../../bdi/%s", dev_name(client->sb->s_bdi->dev));
 449         client->debugfs_bdi = debugfs_create_symlink("bdi", client->debugfs_dir,
 450                                                      name);
 451
 452         return 0;
 453
 454 out:
 455         ceph_debugfs_client_cleanup(client);
 456         return ret;
 457 }
 458
 459 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 460 {
 461         debugfs_remove(client->debugfs_bdi);
 462         debugfs_remove(client->debugfs_caps);
 463         debugfs_remove(client->debugfs_dentry_lru);
 464         debugfs_remove(client->debugfs_osdmap);
 465         debugfs_remove(client->debugfs_mdsmap);
 466         debugfs_remove(client->debugfs_monmap);
 467         debugfs_remove(client->osdc.debugfs_file);
 468         debugfs_remove(client->mdsc.debugfs_file);
 469         debugfs_remove(client->monc.debugfs_file);
 470         debugfs_remove(client->debugfs_congestion_kb);
 471         debugfs_remove(client->debugfs_dir);
 472 }
 473
 474 #else  /* CONFIG_DEBUG_FS */
 475
 476 int __init ceph_debugfs_init(void)
 477 {
 478         return 0;
 479 }
 480
 481 void ceph_debugfs_cleanup(void)
 482 {
 483 }
 484
 485 int ceph_debugfs_client_init(struct ceph_client *client)
 486 {
 487         return 0;
 488 }
 489
 490 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 491 {
 492 }
 493
 494 #endif  /* CONFIG_DEBUG_FS */