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                         spin_lock(&req->r_dentry->d_lock);
 175                         seq_printf(s, " #%llx/%.*s (%s)",
 176                                    ceph_ino(req->r_dentry->d_parent->d_inode),
 177                                    req->r_dentry->d_name.len,
 178                                    req->r_dentry->d_name.name,
 179                                    path ? path : "");
 180                         spin_unlock(&req->r_dentry->d_lock);
 181                         kfree(path);
 182                 } else if (req->r_path1) {
 183                         seq_printf(s, " #%llx/%s", req->r_ino1.ino,
 184                                    req->r_path1);
 185                 }
 186
 187                 if (req->r_old_dentry) {
 188                         path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
 189                                                     &pathbase, 0);
 190                         spin_lock(&req->r_old_dentry->d_lock);
 191                         seq_printf(s, " #%llx/%.*s (%s)",
 192                            ceph_ino(req->r_old_dentry->d_parent->d_inode),
 193                                    req->r_old_dentry->d_name.len,
 194                                    req->r_old_dentry->d_name.name,
 195                                    path ? path : "");
 196                         spin_unlock(&req->r_old_dentry->d_lock);
 197                         kfree(path);
 198                 } else if (req->r_path2) {
 199                         if (req->r_ino2.ino)
 200                                 seq_printf(s, " #%llx/%s", req->r_ino2.ino,
 201                                            req->r_path2);
 202                         else
 203                                 seq_printf(s, " %s", req->r_path2);
 204                 }
 205
 206                 seq_printf(s, "\n");
 207         }
 208         mutex_unlock(&mdsc->mutex);
 209
 210         return 0;
 211 }
 212
 213 static int osdc_show(struct seq_file *s, void *pp)
 214 {
 215         struct ceph_client *client = s->private;
 216         struct ceph_osd_client *osdc = &client->osdc;
 217         struct rb_node *p;
 218
 219         mutex_lock(&osdc->request_mutex);
 220         for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
 221                 struct ceph_osd_request *req;
 222                 struct ceph_osd_request_head *head;
 223                 struct ceph_osd_op *op;
 224                 int num_ops;
 225                 int opcode, olen;
 226                 int i;
 227
 228                 req = rb_entry(p, struct ceph_osd_request, r_node);
 229
 230                 seq_printf(s, "%lld\tosd%d\t%d.%x\t", req->r_tid,
 231                            req->r_osd ? req->r_osd->o_osd : -1,
 232                            le32_to_cpu(req->r_pgid.pool),
 233                            le16_to_cpu(req->r_pgid.ps));
 234
 235                 head = req->r_request->front.iov_base;
 236                 op = (void *)(head + 1);
 237
 238                 num_ops = le16_to_cpu(head->num_ops);
 239                 olen = le32_to_cpu(head->object_len);
 240                 seq_printf(s, "%.*s", olen,
 241                            (const char *)(head->ops + num_ops));
 242
 243                 if (req->r_reassert_version.epoch)
 244                         seq_printf(s, "\t%u'%llu",
 245                            (unsigned)le32_to_cpu(req->r_reassert_version.epoch),
 246                            le64_to_cpu(req->r_reassert_version.version));
 247                 else
 248                         seq_printf(s, "\t");
 249
 250                 for (i = 0; i < num_ops; i++) {
 251                         opcode = le16_to_cpu(op->op);
 252                         seq_printf(s, "\t%s", ceph_osd_op_name(opcode));
 253                         op++;
 254                 }
 255
 256                 seq_printf(s, "\n");
 257         }
 258         mutex_unlock(&osdc->request_mutex);
 259         return 0;
 260 }
 261
 262 static int caps_show(struct seq_file *s, void *p)
 263 {
 264         struct ceph_client *client = p;
 265         int total, avail, used, reserved, min;
 266
 267         ceph_reservation_status(client, &total, &avail, &used, &reserved, &min);
 268         seq_printf(s, "total\t\t%d\n"
 269                    "avail\t\t%d\n"
 270                    "used\t\t%d\n"
 271                    "reserved\t%d\n"
 272                    "min\t%d\n",
 273                    total, avail, used, reserved, min);
 274         return 0;
 275 }
 276
 277 static int dentry_lru_show(struct seq_file *s, void *ptr)
 278 {
 279         struct ceph_client *client = s->private;
 280         struct ceph_mds_client *mdsc = &client->mdsc;
 281         struct ceph_dentry_info *di;
 282
 283         spin_lock(&mdsc->dentry_lru_lock);
 284         list_for_each_entry(di, &mdsc->dentry_lru, lru) {
 285                 struct dentry *dentry = di->dentry;
 286                 seq_printf(s, "%p %p\t%.*s\n",
 287                            di, dentry, dentry->d_name.len, dentry->d_name.name);
 288         }
 289         spin_unlock(&mdsc->dentry_lru_lock);
 290
 291         return 0;
 292 }
 293
 294 #define DEFINE_SHOW_FUNC(name)                                          \
 295 static int name##_open(struct inode *inode, struct file *file)          \
 296 {                                                                       \
 297         struct seq_file *sf;                                            \
 298         int ret;                                                        \
 299                                                                         \
 300         ret = single_open(file, name, NULL);                            \
 301         sf = file->private_data;                                        \
 302         sf->private = inode->i_private;                                 \
 303         return ret;                                                     \
 304 }                                                                       \
 305                                                                         \
 306 static const struct file_operations name##_fops = {                     \
 307         .open           = name##_open,                                  \
 308         .read           = seq_read,                                     \
 309         .llseek         = seq_lseek,                                    \
 310         .release        = single_release,                               \
 311 };
 312
 313 DEFINE_SHOW_FUNC(monmap_show)
 314 DEFINE_SHOW_FUNC(mdsmap_show)
 315 DEFINE_SHOW_FUNC(osdmap_show)
 316 DEFINE_SHOW_FUNC(monc_show)
 317 DEFINE_SHOW_FUNC(mdsc_show)
 318 DEFINE_SHOW_FUNC(osdc_show)
 319 DEFINE_SHOW_FUNC(dentry_lru_show)
 320 DEFINE_SHOW_FUNC(caps_show)
 321
 322 static int congestion_kb_set(void *data, u64 val)
 323 {
 324         struct ceph_client *client = (struct ceph_client *)data;
 325
 326         if (client)
 327                 client->mount_args->congestion_kb = (int)val;
 328
 329         return 0;
 330 }
 331
 332 static int congestion_kb_get(void *data, u64 *val)
 333 {
 334         struct ceph_client *client = (struct ceph_client *)data;
 335
 336         if (client)
 337                 *val = (u64)client->mount_args->congestion_kb;
 338
 339         return 0;
 340 }
 341
 342
 343 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
 344                         congestion_kb_set, "%llu\n");
 345
 346 int __init ceph_debugfs_init(void)
 347 {
 348         ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
 349         if (!ceph_debugfs_dir)
 350                 return -ENOMEM;
 351         return 0;
 352 }
 353
 354 void ceph_debugfs_cleanup(void)
 355 {
 356         debugfs_remove(ceph_debugfs_dir);
 357 }
 358
 359 int ceph_debugfs_client_init(struct ceph_client *client)
 360 {
 361         int ret = 0;
 362         char name[80];
 363
 364         snprintf(name, sizeof(name), FSID_FORMAT ".client%lld",
 365                  PR_FSID(&client->fsid), client->monc.auth->global_id);
 366
 367         client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
 368         if (!client->debugfs_dir)
 369                 goto out;
 370
 371         client->monc.debugfs_file = debugfs_create_file("monc",
 372                                                       0600,
 373                                                       client->debugfs_dir,
 374                                                       client,
 375                                                       &monc_show_fops);
 376         if (!client->monc.debugfs_file)
 377                 goto out;
 378
 379         client->mdsc.debugfs_file = debugfs_create_file("mdsc",
 380                                                       0600,
 381                                                       client->debugfs_dir,
 382                                                       client,
 383                                                       &mdsc_show_fops);
 384         if (!client->mdsc.debugfs_file)
 385                 goto out;
 386
 387         client->osdc.debugfs_file = debugfs_create_file("osdc",
 388                                                       0600,
 389                                                       client->debugfs_dir,
 390                                                       client,
 391                                                       &osdc_show_fops);
 392         if (!client->osdc.debugfs_file)
 393                 goto out;
 394
 395         client->debugfs_monmap = debugfs_create_file("monmap",
 396                                         0600,
 397                                         client->debugfs_dir,
 398                                         client,
 399                                         &monmap_show_fops);
 400         if (!client->debugfs_monmap)
 401                 goto out;
 402
 403         client->debugfs_mdsmap = debugfs_create_file("mdsmap",
 404                                         0600,
 405                                         client->debugfs_dir,
 406                                         client,
 407                                         &mdsmap_show_fops);
 408         if (!client->debugfs_mdsmap)
 409                 goto out;
 410
 411         client->debugfs_osdmap = debugfs_create_file("osdmap",
 412                                         0600,
 413                                         client->debugfs_dir,
 414                                         client,
 415                                         &osdmap_show_fops);
 416         if (!client->debugfs_osdmap)
 417                 goto out;
 418
 419         client->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
 420                                         0600,
 421                                         client->debugfs_dir,
 422                                         client,
 423                                         &dentry_lru_show_fops);
 424         if (!client->debugfs_dentry_lru)
 425                 goto out;
 426
 427         client->debugfs_caps = debugfs_create_file("caps",
 428                                                    0400,
 429                                                    client->debugfs_dir,
 430                                                    client,
 431                                                    &caps_show_fops);
 432         if (!client->debugfs_caps)
 433                 goto out;
 434
 435         client->debugfs_congestion_kb = debugfs_create_file("writeback_congestion_kb",
 436                                                    0600,
 437                                                    client->debugfs_dir,
 438                                                    client,
 439                                                    &congestion_kb_fops);
 440         if (!client->debugfs_congestion_kb)
 441                 goto out;
 442
 443         sprintf(name, "../../bdi/%s", dev_name(client->sb->s_bdi->dev));
 444         client->debugfs_bdi = debugfs_create_symlink("bdi", client->debugfs_dir,
 445                                                      name);
 446
 447         return 0;
 448
 449 out:
 450         ceph_debugfs_client_cleanup(client);
 451         return ret;
 452 }
 453
 454 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 455 {
 456         debugfs_remove(client->debugfs_bdi);
 457         debugfs_remove(client->debugfs_caps);
 458         debugfs_remove(client->debugfs_dentry_lru);
 459         debugfs_remove(client->debugfs_osdmap);
 460         debugfs_remove(client->debugfs_mdsmap);
 461         debugfs_remove(client->debugfs_monmap);
 462         debugfs_remove(client->osdc.debugfs_file);
 463         debugfs_remove(client->mdsc.debugfs_file);
 464         debugfs_remove(client->monc.debugfs_file);
 465         debugfs_remove(client->debugfs_congestion_kb);
 466         debugfs_remove(client->debugfs_dir);
 467 }
 468
 469 #else  // CONFIG_DEBUG_FS
 470
 471 int __init ceph_debugfs_init(void)
 472 {
 473         return 0;
 474 }
 475
 476 void ceph_debugfs_cleanup(void)
 477 {
 478 }
 479
 480 int ceph_debugfs_client_init(struct ceph_client *client)
 481 {
 482         return 0;
 483 }
 484
 485 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 486 {
 487 }
 488
 489 #endif  // CONFIG_DEBUG_FS