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         struct rb_node *n;
  82
  83         if (client->osdc.osdmap == NULL)
  84                 return 0;
  85         seq_printf(s, "epoch %d\n", client->osdc.osdmap->epoch);
  86         seq_printf(s, "flags%s%s\n",
  87                    (client->osdc.osdmap->flags & CEPH_OSDMAP_NEARFULL) ?
  88                    " NEARFULL" : "",
  89                    (client->osdc.osdmap->flags & CEPH_OSDMAP_FULL) ?
  90                    " FULL" : "");
  91         for (n = rb_first(&client->osdc.osdmap->pg_pools); n; n = rb_next(n)) {
  92                 struct ceph_pg_pool_info *pool =
  93                         rb_entry(n, struct ceph_pg_pool_info, node);
  94                 seq_printf(s, "pg_pool %d pg_num %d / %d, lpg_num %d / %d\n",
  95                            pool->id, pool->v.pg_num, pool->pg_num_mask,
  96                            pool->v.lpg_num, pool->lpg_num_mask);
  97         }
  98         for (i = 0; i < client->osdc.osdmap->max_osd; i++) {
  99                 struct ceph_entity_addr *addr =
 100                         &client->osdc.osdmap->osd_addr[i];
 101                 int state = client->osdc.osdmap->osd_state[i];
 102                 char sb[64];
 103
 104                 seq_printf(s, "\tosd%d\t%s\t%3d%%\t(%s)\n",
 105                            i, pr_addr(&addr->in_addr),
 106                            ((client->osdc.osdmap->osd_weight[i]*100) >> 16),
 107                            ceph_osdmap_state_str(sb, sizeof(sb), state));
 108         }
 109         return 0;
 110 }
 111
 112 static int monc_show(struct seq_file *s, void *p)
 113 {
 114         struct ceph_client *client = s->private;
 115         struct ceph_mon_statfs_request *req;
 116         struct ceph_mon_client *monc = &client->monc;
 117         struct rb_node *rp;
 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         for (rp = rb_first(&monc->statfs_request_tree); rp; rp = rb_next(rp)) {
 129                 req = rb_entry(rp, struct ceph_mon_statfs_request, node);
 130                 seq_printf(s, "%lld statfs\n", req->tid);
 131         }
 132
 133         mutex_unlock(&monc->mutex);
 134         return 0;
 135 }
 136
 137 static int mdsc_show(struct seq_file *s, void *p)
 138 {
 139         struct ceph_client *client = s->private;
 140         struct ceph_mds_client *mdsc = &client->mdsc;
 141         struct ceph_mds_request *req;
 142         struct rb_node *rp;
 143         int pathlen;
 144         u64 pathbase;
 145         char *path;
 146
 147         mutex_lock(&mdsc->mutex);
 148         for (rp = rb_first(&mdsc->request_tree); rp; rp = rb_next(rp)) {
 149                 req = rb_entry(rp, struct ceph_mds_request, r_node);
 150
 151                 if (req->r_request)
 152                         seq_printf(s, "%lld\tmds%d\t", req->r_tid, req->r_mds);
 153                 else
 154                         seq_printf(s, "%lld\t(no request)\t", req->r_tid);
 155
 156                 seq_printf(s, "%s", ceph_mds_op_name(req->r_op));
 157
 158                 if (req->r_got_unsafe)
 159                         seq_printf(s, "\t(unsafe)");
 160                 else
 161                         seq_printf(s, "\t");
 162
 163                 if (req->r_inode) {
 164                         seq_printf(s, " #%llx", ceph_ino(req->r_inode));
 165                 } else if (req->r_dentry) {
 166                         path = ceph_mdsc_build_path(req->r_dentry, &pathlen,
 167                                                     &pathbase, 0);
 168                         spin_lock(&req->r_dentry->d_lock);
 169                         seq_printf(s, " #%llx/%.*s (%s)",
 170                                    ceph_ino(req->r_dentry->d_parent->d_inode),
 171                                    req->r_dentry->d_name.len,
 172                                    req->r_dentry->d_name.name,
 173                                    path ? path : "");
 174                         spin_unlock(&req->r_dentry->d_lock);
 175                         kfree(path);
 176                 } else if (req->r_path1) {
 177                         seq_printf(s, " #%llx/%s", req->r_ino1.ino,
 178                                    req->r_path1);
 179                 }
 180
 181                 if (req->r_old_dentry) {
 182                         path = ceph_mdsc_build_path(req->r_old_dentry, &pathlen,
 183                                                     &pathbase, 0);
 184                         spin_lock(&req->r_old_dentry->d_lock);
 185                         seq_printf(s, " #%llx/%.*s (%s)",
 186                            ceph_ino(req->r_old_dentry->d_parent->d_inode),
 187                                    req->r_old_dentry->d_name.len,
 188                                    req->r_old_dentry->d_name.name,
 189                                    path ? path : "");
 190                         spin_unlock(&req->r_old_dentry->d_lock);
 191                         kfree(path);
 192                 } else if (req->r_path2) {
 193                         if (req->r_ino2.ino)
 194                                 seq_printf(s, " #%llx/%s", req->r_ino2.ino,
 195                                            req->r_path2);
 196                         else
 197                                 seq_printf(s, " %s", req->r_path2);
 198                 }
 199
 200                 seq_printf(s, "\n");
 201         }
 202         mutex_unlock(&mdsc->mutex);
 203
 204         return 0;
 205 }
 206
 207 static int osdc_show(struct seq_file *s, void *pp)
 208 {
 209         struct ceph_client *client = s->private;
 210         struct ceph_osd_client *osdc = &client->osdc;
 211         struct rb_node *p;
 212
 213         mutex_lock(&osdc->request_mutex);
 214         for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
 215                 struct ceph_osd_request *req;
 216                 struct ceph_osd_request_head *head;
 217                 struct ceph_osd_op *op;
 218                 int num_ops;
 219                 int opcode, olen;
 220                 int i;
 221
 222                 req = rb_entry(p, struct ceph_osd_request, r_node);
 223
 224                 seq_printf(s, "%lld\tosd%d\t%d.%x\t", req->r_tid,
 225                            req->r_osd ? req->r_osd->o_osd : -1,
 226                            le32_to_cpu(req->r_pgid.pool),
 227                            le16_to_cpu(req->r_pgid.ps));
 228
 229                 head = req->r_request->front.iov_base;
 230                 op = (void *)(head + 1);
 231
 232                 num_ops = le16_to_cpu(head->num_ops);
 233                 olen = le32_to_cpu(head->object_len);
 234                 seq_printf(s, "%.*s", olen,
 235                            (const char *)(head->ops + num_ops));
 236
 237                 if (req->r_reassert_version.epoch)
 238                         seq_printf(s, "\t%u'%llu",
 239                            (unsigned)le32_to_cpu(req->r_reassert_version.epoch),
 240                            le64_to_cpu(req->r_reassert_version.version));
 241                 else
 242                         seq_printf(s, "\t");
 243
 244                 for (i = 0; i < num_ops; i++) {
 245                         opcode = le16_to_cpu(op->op);
 246                         seq_printf(s, "\t%s", ceph_osd_op_name(opcode));
 247                         op++;
 248                 }
 249
 250                 seq_printf(s, "\n");
 251         }
 252         mutex_unlock(&osdc->request_mutex);
 253         return 0;
 254 }
 255
 256 static int caps_show(struct seq_file *s, void *p)
 257 {
 258         struct ceph_client *client = p;
 259         int total, avail, used, reserved, min;
 260
 261         ceph_reservation_status(client, &total, &avail, &used, &reserved, &min);
 262         seq_printf(s, "total\t\t%d\n"
 263                    "avail\t\t%d\n"
 264                    "used\t\t%d\n"
 265                    "reserved\t%d\n"
 266                    "min\t%d\n",
 267                    total, avail, used, reserved, min);
 268         return 0;
 269 }
 270
 271 static int dentry_lru_show(struct seq_file *s, void *ptr)
 272 {
 273         struct ceph_client *client = s->private;
 274         struct ceph_mds_client *mdsc = &client->mdsc;
 275         struct ceph_dentry_info *di;
 276
 277         spin_lock(&mdsc->dentry_lru_lock);
 278         list_for_each_entry(di, &mdsc->dentry_lru, lru) {
 279                 struct dentry *dentry = di->dentry;
 280                 seq_printf(s, "%p %p\t%.*s\n",
 281                            di, dentry, dentry->d_name.len, dentry->d_name.name);
 282         }
 283         spin_unlock(&mdsc->dentry_lru_lock);
 284
 285         return 0;
 286 }
 287
 288 #define DEFINE_SHOW_FUNC(name)                                          \
 289 static int name##_open(struct inode *inode, struct file *file)          \
 290 {                                                                       \
 291         struct seq_file *sf;                                            \
 292         int ret;                                                        \
 293                                                                         \
 294         ret = single_open(file, name, NULL);                            \
 295         sf = file->private_data;                                        \
 296         sf->private = inode->i_private;                                 \
 297         return ret;                                                     \
 298 }                                                                       \
 299                                                                         \
 300 static const struct file_operations name##_fops = {                     \
 301         .open           = name##_open,                                  \
 302         .read           = seq_read,                                     \
 303         .llseek         = seq_lseek,                                    \
 304         .release        = single_release,                               \
 305 };
 306
 307 DEFINE_SHOW_FUNC(monmap_show)
 308 DEFINE_SHOW_FUNC(mdsmap_show)
 309 DEFINE_SHOW_FUNC(osdmap_show)
 310 DEFINE_SHOW_FUNC(monc_show)
 311 DEFINE_SHOW_FUNC(mdsc_show)
 312 DEFINE_SHOW_FUNC(osdc_show)
 313 DEFINE_SHOW_FUNC(dentry_lru_show)
 314 DEFINE_SHOW_FUNC(caps_show)
 315
 316 static int congestion_kb_set(void *data, u64 val)
 317 {
 318         struct ceph_client *client = (struct ceph_client *)data;
 319
 320         if (client)
 321                 client->mount_args->congestion_kb = (int)val;
 322
 323         return 0;
 324 }
 325
 326 static int congestion_kb_get(void *data, u64 *val)
 327 {
 328         struct ceph_client *client = (struct ceph_client *)data;
 329
 330         if (client)
 331                 *val = (u64)client->mount_args->congestion_kb;
 332
 333         return 0;
 334 }
 335
 336
 337 DEFINE_SIMPLE_ATTRIBUTE(congestion_kb_fops, congestion_kb_get,
 338                         congestion_kb_set, "%llu\n");
 339
 340 int __init ceph_debugfs_init(void)
 341 {
 342         ceph_debugfs_dir = debugfs_create_dir("ceph", NULL);
 343         if (!ceph_debugfs_dir)
 344                 return -ENOMEM;
 345         return 0;
 346 }
 347
 348 void ceph_debugfs_cleanup(void)
 349 {
 350         debugfs_remove(ceph_debugfs_dir);
 351 }
 352
 353 int ceph_debugfs_client_init(struct ceph_client *client)
 354 {
 355         int ret = 0;
 356         char name[80];
 357
 358         snprintf(name, sizeof(name), FSID_FORMAT ".client%lld",
 359                  PR_FSID(&client->fsid), client->monc.auth->global_id);
 360
 361         client->debugfs_dir = debugfs_create_dir(name, ceph_debugfs_dir);
 362         if (!client->debugfs_dir)
 363                 goto out;
 364
 365         client->monc.debugfs_file = debugfs_create_file("monc",
 366                                                       0600,
 367                                                       client->debugfs_dir,
 368                                                       client,
 369                                                       &monc_show_fops);
 370         if (!client->monc.debugfs_file)
 371                 goto out;
 372
 373         client->mdsc.debugfs_file = debugfs_create_file("mdsc",
 374                                                       0600,
 375                                                       client->debugfs_dir,
 376                                                       client,
 377                                                       &mdsc_show_fops);
 378         if (!client->mdsc.debugfs_file)
 379                 goto out;
 380
 381         client->osdc.debugfs_file = debugfs_create_file("osdc",
 382                                                       0600,
 383                                                       client->debugfs_dir,
 384                                                       client,
 385                                                       &osdc_show_fops);
 386         if (!client->osdc.debugfs_file)
 387                 goto out;
 388
 389         client->debugfs_monmap = debugfs_create_file("monmap",
 390                                         0600,
 391                                         client->debugfs_dir,
 392                                         client,
 393                                         &monmap_show_fops);
 394         if (!client->debugfs_monmap)
 395                 goto out;
 396
 397         client->debugfs_mdsmap = debugfs_create_file("mdsmap",
 398                                         0600,
 399                                         client->debugfs_dir,
 400                                         client,
 401                                         &mdsmap_show_fops);
 402         if (!client->debugfs_mdsmap)
 403                 goto out;
 404
 405         client->debugfs_osdmap = debugfs_create_file("osdmap",
 406                                         0600,
 407                                         client->debugfs_dir,
 408                                         client,
 409                                         &osdmap_show_fops);
 410         if (!client->debugfs_osdmap)
 411                 goto out;
 412
 413         client->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
 414                                         0600,
 415                                         client->debugfs_dir,
 416                                         client,
 417                                         &dentry_lru_show_fops);
 418         if (!client->debugfs_dentry_lru)
 419                 goto out;
 420
 421         client->debugfs_caps = debugfs_create_file("caps",
 422                                                    0400,
 423                                                    client->debugfs_dir,
 424                                                    client,
 425                                                    &caps_show_fops);
 426         if (!client->debugfs_caps)
 427                 goto out;
 428
 429         client->debugfs_congestion_kb = debugfs_create_file("writeback_congestion_kb",
 430                                                    0600,
 431                                                    client->debugfs_dir,
 432                                                    client,
 433                                                    &congestion_kb_fops);
 434         if (!client->debugfs_congestion_kb)
 435                 goto out;
 436
 437         sprintf(name, "../../bdi/%s", dev_name(client->sb->s_bdi->dev));
 438         client->debugfs_bdi = debugfs_create_symlink("bdi", client->debugfs_dir,
 439                                                      name);
 440
 441         return 0;
 442
 443 out:
 444         ceph_debugfs_client_cleanup(client);
 445         return ret;
 446 }
 447
 448 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 449 {
 450         debugfs_remove(client->debugfs_bdi);
 451         debugfs_remove(client->debugfs_caps);
 452         debugfs_remove(client->debugfs_dentry_lru);
 453         debugfs_remove(client->debugfs_osdmap);
 454         debugfs_remove(client->debugfs_mdsmap);
 455         debugfs_remove(client->debugfs_monmap);
 456         debugfs_remove(client->osdc.debugfs_file);
 457         debugfs_remove(client->mdsc.debugfs_file);
 458         debugfs_remove(client->monc.debugfs_file);
 459         debugfs_remove(client->debugfs_congestion_kb);
 460         debugfs_remove(client->debugfs_dir);
 461 }
 462
 463 #else  // CONFIG_DEBUG_FS
 464
 465 int __init ceph_debugfs_init(void)
 466 {
 467         return 0;
 468 }
 469
 470 void ceph_debugfs_cleanup(void)
 471 {
 472 }
 473
 474 int ceph_debugfs_client_init(struct ceph_client *client)
 475 {
 476         return 0;
 477 }
 478
 479 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 480 {
 481 }
 482
 483 #endif  // CONFIG_DEBUG_FS