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_statfs_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->statfs_request_tree); rp; rp = rb_next(rp)) {
 130                 req = rb_entry(rp, struct ceph_mon_statfs_request, node);
 131                 seq_printf(s, "%lld statfs\n", req->tid);
 132         }
 133
 134         mutex_unlock(&monc->mutex);
 135         return 0;
 136 }
 137
 138 static int mdsc_show(struct seq_file *s, void *p)
 139 {
 140         struct ceph_client *client = s->private;
 141         struct ceph_mds_client *mdsc = &client->mdsc;
 142         struct ceph_mds_request *req;
 143         struct rb_node *rp;
 144         int pathlen;
 145         u64 pathbase;
 146         char *path;
 147
 148         mutex_lock(&mdsc->mutex);
 149         for (rp = rb_first(&mdsc->request_tree); rp; rp = rb_next(rp)) {
 150                 req = rb_entry(rp, struct ceph_mds_request, r_node);
 151
 152                 if (req->r_request)
 153                         seq_printf(s, "%lld\tmds%d\t", req->r_tid, req->r_mds);
 154                 else
 155                         seq_printf(s, "%lld\t(no request)\t", req->r_tid);
 156
 157                 seq_printf(s, "%s", ceph_mds_op_name(req->r_op));
 158
 159                 if (req->r_got_unsafe)
 160                         seq_printf(s, "\t(unsafe)");
 161                 else
 162                         seq_printf(s, "\t");
 163
 164                 if (req->r_inode) {
 165                         seq_printf(s, " #%llx", ceph_ino(req->r_inode));
 166                 } else if (req->r_dentry) {
 167                         path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
 168                                                     &pathbase, 0);
 169                         spin_lock(&req->r_dentry->d_lock);
 170                         seq_printf(s, " #%llx/%.*s (%s)",
 171                                    ceph_ino(req->r_dentry->d_parent->d_inode),
 172                                    req->r_dentry->d_name.len,
 173                                    req->r_dentry->d_name.name,
 174                                    path ? path : "");
 175                         spin_unlock(&req->r_dentry->d_lock);
 176                         kfree(path);
 177                 } else if (req->r_path1) {
 178                         seq_printf(s, " #%llx/%s", req->r_ino1.ino,
 179                                    req->r_path1);
 180                 }
 181
 182                 if (req->r_old_dentry) {
 183                         path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
 184                                                     &pathbase, 0);
 185                         spin_lock(&req->r_old_dentry->d_lock);
 186                         seq_printf(s, " #%llx/%.*s (%s)",
 187                            ceph_ino(req->r_old_dentry->d_parent->d_inode),
 188                                    req->r_old_dentry->d_name.len,
 189                                    req->r_old_dentry->d_name.name,
 190                                    path ? path : "");
 191                         spin_unlock(&req->r_old_dentry->d_lock);
 192                         kfree(path);
 193                 } else if (req->r_path2) {
 194                         if (req->r_ino2.ino)
 195                                 seq_printf(s, " #%llx/%s", req->r_ino2.ino,
 196                                            req->r_path2);
 197                         else
 198                                 seq_printf(s, " %s", req->r_path2);
 199                 }
 200
 201                 seq_printf(s, "\n");
 202         }
 203         mutex_unlock(&mdsc->mutex);
 204
 205         return 0;
 206 }
 207
 208 static int osdc_show(struct seq_file *s, void *pp)
 209 {
 210         struct ceph_client *client = s->private;
 211         struct ceph_osd_client *osdc = &client->osdc;
 212         struct rb_node *p;
 213
 214         mutex_lock(&osdc->request_mutex);
 215         for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
 216                 struct ceph_osd_request *req;
 217                 struct ceph_osd_request_head *head;
 218                 struct ceph_osd_op *op;
 219                 int num_ops;
 220                 int opcode, olen;
 221                 int i;
 222
 223                 req = rb_entry(p, struct ceph_osd_request, r_node);
 224
 225                 seq_printf(s, "%lld\tosd%d\t%d.%x\t", req->r_tid,
 226                            req->r_osd ? req->r_osd->o_osd : -1,
 227                            le32_to_cpu(req->r_pgid.pool),
 228                            le16_to_cpu(req->r_pgid.ps));
 229
 230                 head = req->r_request->front.iov_base;
 231                 op = (void *)(head + 1);
 232
 233                 num_ops = le16_to_cpu(head->num_ops);
 234                 olen = le32_to_cpu(head->object_len);
 235                 seq_printf(s, "%.*s", olen,
 236                            (const char *)(head->ops + num_ops));
 237
 238                 if (req->r_reassert_version.epoch)
 239                         seq_printf(s, "\t%u'%llu",
 240                            (unsigned)le32_to_cpu(req->r_reassert_version.epoch),
 241                            le64_to_cpu(req->r_reassert_version.version));
 242                 else
 243                         seq_printf(s, "\t");
 244
 245                 for (i = 0; i < num_ops; i++) {
 246                         opcode = le16_to_cpu(op->op);
 247                         seq_printf(s, "\t%s", ceph_osd_op_name(opcode));
 248                         op++;
 249                 }
 250
 251                 seq_printf(s, "\n");
 252         }
 253         mutex_unlock(&osdc->request_mutex);
 254         return 0;
 255 }
 256
 257 static int caps_show(struct seq_file *s, void *p)
 258 {
 259         struct ceph_client *client = p;
 260         int total, avail, used, reserved, min;
 261
 262         ceph_reservation_status(client, &total, &avail, &used, &reserved, &min);
 263         seq_printf(s, "total\t\t%d\n"
 264                    "avail\t\t%d\n"
 265                    "used\t\t%d\n"
 266                    "reserved\t%d\n"
 267                    "min\t%d\n",
 268                    total, avail, used, reserved, min);
 269         return 0;
 270 }
 271
 272 static int dentry_lru_show(struct seq_file *s, void *ptr)
 273 {
 274         struct ceph_client *client = s->private;
 275         struct ceph_mds_client *mdsc = &client->mdsc;
 276         struct ceph_dentry_info *di;
 277
 278         spin_lock(&mdsc->dentry_lru_lock);
 279         list_for_each_entry(di, &mdsc->dentry_lru, lru) {
 280                 struct dentry *dentry = di->dentry;
 281                 seq_printf(s, "%p %p\t%.*s\n",
 282                            di, dentry, dentry->d_name.len, dentry->d_name.name);
 283         }
 284         spin_unlock(&mdsc->dentry_lru_lock);
 285
 286         return 0;
 287 }
 288
 289 #define DEFINE_SHOW_FUNC(name)                                          \
 290 static int name##_open(struct inode *inode, struct file *file)          \
 291 {                                                                       \
 292         struct seq_file *sf;                                            \
 293         int ret;                                                        \
 294                                                                         \
 295         ret = single_open(file, name, NULL);                            \
 296         sf = file->private_data;                                        \
 297         sf->private = inode->i_private;                                 \
 298         return ret;                                                     \
 299 }                                                                       \
 300                                                                         \
 301 static const struct file_operations name##_fops = {                     \
 302         .open           = name##_open,                                  \
 303         .read           = seq_read,                                     \
 304         .llseek         = seq_lseek,                                    \
 305         .release        = single_release,                               \
 306 };
 307
 308 DEFINE_SHOW_FUNC(monmap_show)
 309 DEFINE_SHOW_FUNC(mdsmap_show)
 310 DEFINE_SHOW_FUNC(osdmap_show)
 311 DEFINE_SHOW_FUNC(monc_show)
 312 DEFINE_SHOW_FUNC(mdsc_show)
 313 DEFINE_SHOW_FUNC(osdc_show)
 314 DEFINE_SHOW_FUNC(dentry_lru_show)
 315 DEFINE_SHOW_FUNC(caps_show)
 316
 317 static int congestion_kb_set(void *data, u64 val)
 318 {
 319         struct ceph_client *client = (struct ceph_client *)data;
 320
 321         if (client)
 322                 client->mount_args->congestion_kb = (int)val;
 323
 324         return 0;
 325 }
 326
 327 static int congestion_kb_get(void *data, u64 *val)
 328 {
 329         struct ceph_client *client = (struct ceph_client *)data;
 330
 331         if (client)
 332                 *val = (u64)client->mount_args->congestion_kb;
 333
 334         return 0;
 335 }
 336
 337
 338 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
 339                         congestion_kb_set, "%llu\n");
 340
 341 int __init ceph_debugfs_init(void)
 342 {
 343         ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
 344         if (!ceph_debugfs_dir)
 345                 return -ENOMEM;
 346         return 0;
 347 }
 348
 349 void ceph_debugfs_cleanup(void)
 350 {
 351         debugfs_remove(ceph_debugfs_dir);
 352 }
 353
 354 int ceph_debugfs_client_init(struct ceph_client *client)
 355 {
 356         int ret = 0;
 357         char name[80];
 358
 359         snprintf(name, sizeof(name), FSID_FORMAT ".client%lld",
 360                  PR_FSID(&client->fsid), client->monc.auth->global_id);
 361
 362         client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
 363         if (!client->debugfs_dir)
 364                 goto out;
 365
 366         client->monc.debugfs_file = debugfs_create_file("monc",
 367                                                       0600,
 368                                                       client->debugfs_dir,
 369                                                       client,
 370                                                       &monc_show_fops);
 371         if (!client->monc.debugfs_file)
 372                 goto out;
 373
 374         client->mdsc.debugfs_file = debugfs_create_file("mdsc",
 375                                                       0600,
 376                                                       client->debugfs_dir,
 377                                                       client,
 378                                                       &mdsc_show_fops);
 379         if (!client->mdsc.debugfs_file)
 380                 goto out;
 381
 382         client->osdc.debugfs_file = debugfs_create_file("osdc",
 383                                                       0600,
 384                                                       client->debugfs_dir,
 385                                                       client,
 386                                                       &osdc_show_fops);
 387         if (!client->osdc.debugfs_file)
 388                 goto out;
 389
 390         client->debugfs_monmap = debugfs_create_file("monmap",
 391                                         0600,
 392                                         client->debugfs_dir,
 393                                         client,
 394                                         &monmap_show_fops);
 395         if (!client->debugfs_monmap)
 396                 goto out;
 397
 398         client->debugfs_mdsmap = debugfs_create_file("mdsmap",
 399                                         0600,
 400                                         client->debugfs_dir,
 401                                         client,
 402                                         &mdsmap_show_fops);
 403         if (!client->debugfs_mdsmap)
 404                 goto out;
 405
 406         client->debugfs_osdmap = debugfs_create_file("osdmap",
 407                                         0600,
 408                                         client->debugfs_dir,
 409                                         client,
 410                                         &osdmap_show_fops);
 411         if (!client->debugfs_osdmap)
 412                 goto out;
 413
 414         client->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
 415                                         0600,
 416                                         client->debugfs_dir,
 417                                         client,
 418                                         &dentry_lru_show_fops);
 419         if (!client->debugfs_dentry_lru)
 420                 goto out;
 421
 422         client->debugfs_caps = debugfs_create_file("caps",
 423                                                    0400,
 424                                                    client->debugfs_dir,
 425                                                    client,
 426                                                    &caps_show_fops);
 427         if (!client->debugfs_caps)
 428                 goto out;
 429
 430         client->debugfs_congestion_kb = debugfs_create_file("writeback_congestion_kb",
 431                                                    0600,
 432                                                    client->debugfs_dir,
 433                                                    client,
 434                                                    &congestion_kb_fops);
 435         if (!client->debugfs_congestion_kb)
 436                 goto out;
 437
 438         sprintf(name, "../../bdi/%s", dev_name(client->sb->s_bdi->dev));
 439         client->debugfs_bdi = debugfs_create_symlink("bdi", client->debugfs_dir,
 440                                                      name);
 441
 442         return 0;
 443
 444 out:
 445         ceph_debugfs_client_cleanup(client);
 446         return ret;
 447 }
 448
 449 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 450 {
 451         debugfs_remove(client->debugfs_bdi);
 452         debugfs_remove(client->debugfs_caps);
 453         debugfs_remove(client->debugfs_dentry_lru);
 454         debugfs_remove(client->debugfs_osdmap);
 455         debugfs_remove(client->debugfs_mdsmap);
 456         debugfs_remove(client->debugfs_monmap);
 457         debugfs_remove(client->osdc.debugfs_file);
 458         debugfs_remove(client->mdsc.debugfs_file);
 459         debugfs_remove(client->monc.debugfs_file);
 460         debugfs_remove(client->debugfs_congestion_kb);
 461         debugfs_remove(client->debugfs_dir);
 462 }
 463
 464 #else  // CONFIG_DEBUG_FS
 465
 466 int __init ceph_debugfs_init(void)
 467 {
 468         return 0;
 469 }
 470
 471 void ceph_debugfs_cleanup(void)
 472 {
 473 }
 474
 475 int ceph_debugfs_client_init(struct ceph_client *client)
 476 {
 477         return 0;
 478 }
 479
 480 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 481 {
 482 }
 483
 484 #endif  // CONFIG_DEBUG_FS