lustre/obdclass/lprocfs_status_server.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2014, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/obdclass/lprocfs_status_server.c
  33  */
  34
  35 #define DEBUG_SUBSYSTEM S_CLASS
  36
  37 #include <linux/kobject.h>
  38 #include <linux/sysfs.h>
  39
  40 #include <obd_class.h>
  41 #include <lprocfs_status.h>
  42 #include <lustre_nodemap.h>
  43
  44 #define MAX_STRING_SIZE 128
  45
  46 struct dentry *ldebugfs_add_symlink(const char *name, const char *target,
  47                                     const char *format, ...)
  48 {
  49         struct dentry *entry = NULL;
  50         struct dentry *parent;
  51         struct qstr dname;
  52         va_list ap;
  53         char *dest;
  54
  55         if (!target || !format)
  56                 return NULL;
  57
  58         dname.name = target;
  59         dname.len = strlen(dname.name);
  60         dname.hash = ll_full_name_hash(debugfs_lustre_root,
  61                                        dname.name, dname.len);
  62         parent = d_lookup(debugfs_lustre_root, &dname);
  63         if (!parent)
  64                 return NULL;
  65
  66         OBD_ALLOC_WAIT(dest, MAX_STRING_SIZE + 1);
  67         if (!dest)
  68                 goto no_entry;
  69
  70         va_start(ap, format);
  71         vsnprintf(dest, MAX_STRING_SIZE, format, ap);
  72         va_end(ap);
  73
  74         entry = debugfs_create_symlink(name, parent, dest);
  75         if (IS_ERR_OR_NULL(entry)) {
  76                 CERROR("LdebugFS: Could not create symbolic link from %s to %s\n",
  77                        name, dest);
  78                 entry = NULL;
  79         }
  80
  81         OBD_FREE(dest, MAX_STRING_SIZE + 1);
  82 no_entry:
  83         dput(parent);
  84         return entry;
  85 }
  86 EXPORT_SYMBOL(ldebugfs_add_symlink);
  87
  88 #ifdef CONFIG_PROC_FS
  89
  90 int lprocfs_evict_client_open(struct inode *inode, struct file *f)
  91 {
  92         struct obd_device *obd = PDE_DATA(file_inode(f));
  93
  94         atomic_inc(&obd->obd_evict_inprogress);
  95         return 0;
  96 }
  97
  98 int lprocfs_evict_client_release(struct inode *inode, struct file *f)
  99 {
 100         struct obd_device *obd = PDE_DATA(file_inode(f));
 101
 102         atomic_dec(&obd->obd_evict_inprogress);
 103         wake_up(&obd->obd_evict_inprogress_waitq);
 104
 105         return 0;
 106 }
 107
 108 #define BUFLEN (UUID_MAX + 5)
 109
 110 ssize_t
 111 lprocfs_evict_client_seq_write(struct file *file, const char __user *buffer,
 112                                size_t count, loff_t *off)
 113 {
 114         struct seq_file *m = file->private_data;
 115         struct obd_device *obd = m->private;
 116         char *tmpbuf, *kbuf;
 117
 118         OBD_ALLOC(kbuf, BUFLEN);
 119         if (kbuf == NULL)
 120                 return -ENOMEM;
 121
 122         /*
 123          * OBD_ALLOC() will zero kbuf, but we only copy BUFLEN - 1
 124          * bytes into kbuf, to ensure that the string is NUL-terminated.
 125          * UUID_MAX should include a trailing NUL already.
 126          */
 127         if (copy_from_user(kbuf, buffer,
 128                            min_t(unsigned long, BUFLEN - 1, count))) {
 129                 count = -EFAULT;
 130                 goto out;
 131         }
 132         tmpbuf = cfs_firststr(kbuf, min_t(unsigned long, BUFLEN - 1, count));
 133         class_incref(obd, __func__, current);
 134
 135         if (strncmp(tmpbuf, "nid:", 4) == 0)
 136                 obd_export_evict_by_nid(obd, tmpbuf + 4);
 137         else if (strncmp(tmpbuf, "uuid:", 5) == 0)
 138                 obd_export_evict_by_uuid(obd, tmpbuf + 5);
 139         else
 140                 obd_export_evict_by_uuid(obd, tmpbuf);
 141
 142         class_decref(obd, __func__, current);
 143
 144 out:
 145         OBD_FREE(kbuf, BUFLEN);
 146         return count;
 147 }
 148 EXPORT_SYMBOL(lprocfs_evict_client_seq_write);
 149
 150 #undef BUFLEN
 151
 152 ssize_t num_exports_show(struct kobject *kobj, struct attribute *attr,
 153                          char *buf)
 154 {
 155         struct obd_device *obd = container_of(kobj, struct obd_device,
 156                                               obd_kset.kobj);
 157
 158         return scnprintf(buf, PAGE_SIZE, "%u\n", obd->obd_num_exports);
 159 }
 160 EXPORT_SYMBOL(num_exports_show);
 161
 162 static int obd_export_flags2str(struct obd_export *exp, struct seq_file *m)
 163 {
 164         bool first = true;
 165
 166         flag2str(exp, failed);
 167         flag2str(exp, in_recovery);
 168         flag2str(exp, disconnected);
 169         flag2str(exp, connecting);
 170
 171         return 0;
 172 }
 173
 174 static int
 175 lprocfs_exp_print_export_seq(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 176                              struct hlist_node *hnode, void *cb_data)
 177 {
 178         struct seq_file         *m = cb_data;
 179         struct obd_export       *exp = cfs_hash_object(hs, hnode);
 180         struct obd_device       *obd;
 181         struct obd_connect_data *ocd;
 182
 183         LASSERT(exp != NULL);
 184         if (exp->exp_nid_stats == NULL)
 185                 goto out;
 186         obd = exp->exp_obd;
 187         ocd = &exp->exp_connect_data;
 188
 189         seq_printf(m, "%s:\n"
 190                    "    name: %s\n"
 191                    "    client: %s\n"
 192                    "    connect_flags: [ ",
 193                    obd_uuid2str(&exp->exp_client_uuid),
 194                    obd->obd_name,
 195                    obd_export_nid2str(exp));
 196         obd_connect_seq_flags2str(m, ocd->ocd_connect_flags,
 197                                   ocd->ocd_connect_flags2, ", ");
 198         seq_printf(m, " ]\n");
 199         obd_connect_data_seqprint(m, ocd);
 200         seq_printf(m, "    export_flags: [ ");
 201         obd_export_flags2str(exp, m);
 202         seq_printf(m, " ]\n");
 203
 204 out:
 205         return 0;
 206 }
 207
 208 /**
 209  * RPC connections are composed of an import and an export. Using the
 210  * lctl utility we can extract important information about the state.
 211  * The lprocfs_exp_export_seq_show routine displays the state information
 212  * for the export.
 213  *
 214  * \param[in] m         seq file
 215  * \param[in] data      unused
 216  *
 217  * \retval              0 on success
 218  *
 219  * The format of the export state information is like:
 220  * a793e354-49c0-aa11-8c4f-a4f2b1a1a92b:
 221  *     name: MGS
 222  *     client: 10.211.55.10@tcp
 223  *     connect_flags: [ version, barrier, adaptive_timeouts, ... ]
 224  *     connect_data:
 225  *        flags: 0x2000011005002020
 226  *        instance: 0
 227  *        target_version: 2.10.51.0
 228  *        export_flags: [ ... ]
 229  *
 230  */
 231 static int lprocfs_exp_export_seq_show(struct seq_file *m, void *data)
 232 {
 233         struct nid_stat *stats = m->private;
 234         struct obd_device *obd = stats->nid_obd;
 235
 236         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
 237                               lprocfs_exp_print_export_seq, m);
 238         return 0;
 239 }
 240 LPROC_SEQ_FOPS_RO(lprocfs_exp_export);
 241
 242 static void lprocfs_free_client_stats(struct nid_stat *client_stat)
 243 {
 244         CDEBUG(D_CONFIG, "stat %p - data %p/%p\n", client_stat,
 245                client_stat->nid_proc, client_stat->nid_stats);
 246
 247         LASSERTF(atomic_read(&client_stat->nid_exp_ref_count) == 0,
 248                  "nid %s:count %d\n", libcfs_nid2str(client_stat->nid),
 249                  atomic_read(&client_stat->nid_exp_ref_count));
 250
 251         if (client_stat->nid_proc)
 252                 lprocfs_remove(&client_stat->nid_proc);
 253
 254         if (client_stat->nid_stats)
 255                 lprocfs_free_stats(&client_stat->nid_stats);
 256
 257         if (client_stat->nid_ldlm_stats)
 258                 lprocfs_free_stats(&client_stat->nid_ldlm_stats);
 259
 260         OBD_FREE_PTR(client_stat);
 261 }
 262
 263 void lprocfs_free_per_client_stats(struct obd_device *obd)
 264 {
 265         struct cfs_hash *hash = obd->obd_nid_stats_hash;
 266         struct nid_stat *stat;
 267         ENTRY;
 268
 269         /* we need extra list - because hash_exit called to early */
 270         /* not need locking because all clients is died */
 271         while (!list_empty(&obd->obd_nid_stats)) {
 272                 stat = list_entry(obd->obd_nid_stats.next,
 273                                   struct nid_stat, nid_list);
 274                 list_del_init(&stat->nid_list);
 275                 cfs_hash_del(hash, &stat->nid, &stat->nid_hash);
 276                 lprocfs_free_client_stats(stat);
 277         }
 278         EXIT;
 279 }
 280 EXPORT_SYMBOL(lprocfs_free_per_client_stats);
 281
 282 static int
 283 lprocfs_exp_print_uuid_seq(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 284                            struct hlist_node *hnode, void *cb_data)
 285 {
 286         struct seq_file *m = cb_data;
 287         struct obd_export *exp = cfs_hash_object(hs, hnode);
 288
 289         if (exp->exp_nid_stats != NULL)
 290                 seq_printf(m, "%s\n", obd_uuid2str(&exp->exp_client_uuid));
 291         return 0;
 292 }
 293
 294 static int
 295 lprocfs_exp_print_nodemap_seq(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 296                               struct hlist_node *hnode, void *cb_data)
 297 {
 298         struct seq_file *m = cb_data;
 299         struct obd_export *exp = cfs_hash_object(hs, hnode);
 300         struct lu_nodemap *nodemap = exp->exp_target_data.ted_nodemap;
 301
 302         if (nodemap != NULL)
 303                 seq_printf(m, "%s\n", nodemap->nm_name);
 304         return 0;
 305 }
 306
 307 static int
 308 lprocfs_exp_nodemap_seq_show(struct seq_file *m, void *data)
 309 {
 310         struct nid_stat *stats = m->private;
 311         struct obd_device *obd = stats->nid_obd;
 312
 313         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
 314                               lprocfs_exp_print_nodemap_seq, m);
 315         return 0;
 316 }
 317 LPROC_SEQ_FOPS_RO(lprocfs_exp_nodemap);
 318
 319 static int lprocfs_exp_uuid_seq_show(struct seq_file *m, void *data)
 320 {
 321         struct nid_stat *stats = m->private;
 322         struct obd_device *obd = stats->nid_obd;
 323
 324         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
 325                                 lprocfs_exp_print_uuid_seq, m);
 326         return 0;
 327 }
 328 LPROC_SEQ_FOPS_RO(lprocfs_exp_uuid);
 329
 330 #define HASH_NAME_LEN   16
 331
 332 static void ldebugfs_rhash_seq_show(const char *name, struct rhashtable *ht,
 333                                     struct seq_file *m)
 334 {
 335         unsigned int max_size = ht->p.max_size ? ht->p.max_size : UINT_MAX;
 336         struct bucket_table *tbl;
 337         int dist[8] = { 0, };
 338         int maxdep = 0;
 339         int i;
 340
 341         rcu_read_lock();
 342         tbl = rht_dereference(ht->tbl, ht);
 343         for (i = 0; i < tbl->size; i++) {
 344                 struct rhash_head *pos;
 345                 int count = 0;
 346
 347                 rht_for_each(pos, tbl, i)
 348                         count++;
 349
 350                 if (count)
 351                         maxdep = max(maxdep, count);
 352
 353                 dist[min(fls(count), 7)]++;
 354         }
 355
 356         seq_printf(m, "%-*s %5d %5d %10u %d.%03d 0.300 0.750 0x%03x %7d %7d %7d ",
 357                    HASH_NAME_LEN, name, tbl->size, ht->p.min_size, max_size,
 358                    atomic_read(&ht->nelems) / tbl->size,
 359                    atomic_read(&ht->nelems) * 1000 / tbl->size,
 360                    ht->p.automatic_shrinking, 0,
 361                    atomic_read(&ht->nelems), maxdep);
 362         rcu_read_unlock();
 363
 364         for (i = 0; i < 8; i++)
 365                 seq_printf(m, "%d%c",  dist[i], (i == 7) ? '\n' : '/');
 366 }
 367
 368 static int
 369 lprocfs_exp_print_hash_seq(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 370                            struct hlist_node *hnode, void *cb_data)
 371
 372 {
 373         struct seq_file *m = cb_data;
 374         struct obd_export *exp = cfs_hash_object(hs, hnode);
 375
 376         if (exp->exp_lock_hash != NULL) {
 377                 cfs_hash_debug_header(m);
 378                 cfs_hash_debug_str(hs, m);
 379         }
 380         return 0;
 381 }
 382
 383 static int lprocfs_exp_hash_seq_show(struct seq_file *m, void *data)
 384 {
 385         struct nid_stat *stats = m->private;
 386         struct obd_device *obd = stats->nid_obd;
 387
 388         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
 389                                 lprocfs_exp_print_hash_seq, m);
 390         return 0;
 391 }
 392 LPROC_SEQ_FOPS_RO(lprocfs_exp_hash);
 393
 394 int lprocfs_exp_print_replydata_seq(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 395                                     struct hlist_node *hnode, void *cb_data)
 396
 397 {
 398         struct obd_export *exp = cfs_hash_object(hs, hnode);
 399         struct seq_file *m = cb_data;
 400         struct tg_export_data *ted = &exp->exp_target_data;
 401
 402         seq_printf(m, "reply_cnt: %d\n"
 403                    "reply_max: %d\n"
 404                    "reply_released_by_xid: %d\n"
 405                    "reply_released_by_tag: %d\n\n",
 406                    ted->ted_reply_cnt,
 407                    ted->ted_reply_max,
 408                    ted->ted_release_xid,
 409                    ted->ted_release_tag);
 410         return 0;
 411 }
 412
 413 int lprocfs_exp_replydata_seq_show(struct seq_file *m, void *data)
 414 {
 415         struct nid_stat *stats = m->private;
 416         struct obd_device *obd = stats->nid_obd;
 417
 418         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
 419                                 lprocfs_exp_print_replydata_seq, m);
 420         return 0;
 421 }
 422 LPROC_SEQ_FOPS_RO(lprocfs_exp_replydata);
 423
 424 int lprocfs_exp_print_fmd_count_seq(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 425                                     struct hlist_node *hnode, void *cb_data)
 426
 427 {
 428         struct obd_export *exp = cfs_hash_object(hs, hnode);
 429         struct seq_file *m = cb_data;
 430         struct tg_export_data *ted = &exp->exp_target_data;
 431
 432         seq_printf(m, "%d\n", ted->ted_fmd_count);
 433
 434         return 0;
 435 }
 436
 437 int lprocfs_exp_fmd_count_seq_show(struct seq_file *m, void *data)
 438 {
 439         struct nid_stat *stats = m->private;
 440         struct obd_device *obd = stats->nid_obd;
 441
 442         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
 443                               lprocfs_exp_print_fmd_count_seq, m);
 444         return 0;
 445 }
 446 LPROC_SEQ_FOPS_RO(lprocfs_exp_fmd_count);
 447
 448 int lprocfs_nid_stats_clear_seq_show(struct seq_file *m, void *data)
 449 {
 450         seq_puts(m, "Write into this file to clear all nid stats and stale nid entries\n");
 451         return 0;
 452 }
 453 EXPORT_SYMBOL(lprocfs_nid_stats_clear_seq_show);
 454
 455 static int lprocfs_nid_stats_clear_write_cb(void *obj, void *data)
 456 {
 457         struct nid_stat *stat = obj;
 458         ENTRY;
 459
 460         CDEBUG(D_INFO, "refcnt %d\n", atomic_read(&stat->nid_exp_ref_count));
 461         if (atomic_read(&stat->nid_exp_ref_count) == 1) {
 462                 /* object has only hash references. */
 463                 spin_lock(&stat->nid_obd->obd_nid_lock);
 464                 list_move(&stat->nid_list, data);
 465                 spin_unlock(&stat->nid_obd->obd_nid_lock);
 466                 RETURN(1);
 467         }
 468         /* we has reference to object - only clear data*/
 469         if (stat->nid_stats)
 470                 lprocfs_clear_stats(stat->nid_stats);
 471
 472         RETURN(0);
 473 }
 474
 475 ssize_t
 476 lprocfs_nid_stats_clear_seq_write(struct file *file, const char __user *buffer,
 477                                         size_t count, loff_t *off)
 478 {
 479         struct seq_file *m = file->private_data;
 480         struct obd_device *obd = m->private;
 481         struct nid_stat *client_stat;
 482         LIST_HEAD(free_list);
 483
 484         cfs_hash_cond_del(obd->obd_nid_stats_hash,
 485                           lprocfs_nid_stats_clear_write_cb, &free_list);
 486
 487         while (!list_empty(&free_list)) {
 488                 client_stat = list_entry(free_list.next, struct nid_stat,
 489                                          nid_list);
 490                 list_del_init(&client_stat->nid_list);
 491                 lprocfs_free_client_stats(client_stat);
 492         }
 493         return count;
 494 }
 495 EXPORT_SYMBOL(lprocfs_nid_stats_clear_seq_write);
 496
 497 int lprocfs_exp_setup(struct obd_export *exp, lnet_nid_t *nid)
 498 {
 499         struct nid_stat *new_stat, *old_stat;
 500         struct obd_device *obd = NULL;
 501         struct proc_dir_entry *entry;
 502         char nidstr[LNET_NIDSTR_SIZE];
 503         int rc = 0;
 504         ENTRY;
 505
 506         if (!exp || !exp->exp_obd || !exp->exp_obd->obd_proc_exports_entry ||
 507             !exp->exp_obd->obd_nid_stats_hash)
 508                 RETURN(-EINVAL);
 509
 510         /* not test against zero because eric say:
 511          * You may only test nid against another nid, or LNET_NID_ANY.
 512          * Anything else is nonsense.*/
 513         if (nid == NULL || *nid == LNET_NID_ANY)
 514                 RETURN(-EALREADY);
 515
 516         libcfs_nid2str_r(*nid, nidstr, sizeof(nidstr));
 517
 518         spin_lock(&exp->exp_lock);
 519         if (exp->exp_nid_stats != NULL) {
 520                 spin_unlock(&exp->exp_lock);
 521                 RETURN(-EALREADY);
 522         }
 523         spin_unlock(&exp->exp_lock);
 524
 525         obd = exp->exp_obd;
 526
 527         CDEBUG(D_CONFIG, "using hash %p\n", obd->obd_nid_stats_hash);
 528
 529         OBD_ALLOC_PTR(new_stat);
 530         if (new_stat == NULL)
 531                 RETURN(-ENOMEM);
 532
 533         new_stat->nid     = *nid;
 534         new_stat->nid_obd = exp->exp_obd;
 535         /* we need set default refcount to 1 to balance obd_disconnect */
 536         atomic_set(&new_stat->nid_exp_ref_count, 1);
 537
 538         old_stat = cfs_hash_findadd_unique(obd->obd_nid_stats_hash,
 539                                            nid, &new_stat->nid_hash);
 540         CDEBUG(D_INFO, "Found stats %p for nid %s - ref %d\n",
 541                old_stat, nidstr, atomic_read(&old_stat->nid_exp_ref_count));
 542
 543         /* Return -EALREADY here so that we know that the /proc
 544          * entry already has been created */
 545         if (old_stat != new_stat) {
 546                 spin_lock(&exp->exp_lock);
 547                 if (exp->exp_nid_stats) {
 548                         LASSERT(exp->exp_nid_stats == old_stat);
 549                         nidstat_putref(exp->exp_nid_stats);
 550                 }
 551                 exp->exp_nid_stats = old_stat;
 552                 spin_unlock(&exp->exp_lock);
 553                 GOTO(destroy_new, rc = -EALREADY);
 554         }
 555         /* not found - create */
 556         new_stat->nid_proc = lprocfs_register(nidstr,
 557                                               obd->obd_proc_exports_entry,
 558                                               NULL, NULL);
 559
 560         if (IS_ERR(new_stat->nid_proc)) {
 561                 rc = PTR_ERR(new_stat->nid_proc);
 562                 new_stat->nid_proc = NULL;
 563                 CERROR("%s: cannot create proc entry for export %s: rc = %d\n",
 564                        obd->obd_name, nidstr, rc);
 565                 GOTO(destroy_new_ns, rc);
 566         }
 567
 568         entry = lprocfs_add_simple(new_stat->nid_proc, "nodemap", new_stat,
 569                                    &lprocfs_exp_nodemap_fops);
 570         if (IS_ERR(entry)) {
 571                 rc = PTR_ERR(entry);
 572                 CWARN("%s: error adding the nodemap file: rc = %d\n",
 573                       obd->obd_name, rc);
 574                 GOTO(destroy_new_ns, rc);
 575         }
 576
 577         entry = lprocfs_add_simple(new_stat->nid_proc, "uuid", new_stat,
 578                                    &lprocfs_exp_uuid_fops);
 579         if (IS_ERR(entry)) {
 580                 rc = PTR_ERR(entry);
 581                 CWARN("%s: error adding the NID stats file: rc = %d\n",
 582                       obd->obd_name, rc);
 583                 GOTO(destroy_new_ns, rc);
 584         }
 585
 586         entry = lprocfs_add_simple(new_stat->nid_proc, "hash", new_stat,
 587                                    &lprocfs_exp_hash_fops);
 588         if (IS_ERR(entry)) {
 589                 rc = PTR_ERR(entry);
 590                 CWARN("%s: error adding the hash file: rc = %d\n",
 591                       obd->obd_name, rc);
 592                 GOTO(destroy_new_ns, rc);
 593         }
 594
 595         entry = lprocfs_add_simple(new_stat->nid_proc, "export",
 596                                    new_stat, &lprocfs_exp_export_fops);
 597         if (IS_ERR(entry)) {
 598                 rc = PTR_ERR(entry);
 599                 CWARN("%s: error adding the export file: rc = %d\n",
 600                       obd->obd_name, rc);
 601                 GOTO(destroy_new_ns, rc);
 602         }
 603
 604         entry = lprocfs_add_simple(new_stat->nid_proc, "reply_data", new_stat,
 605                                    &lprocfs_exp_replydata_fops);
 606         if (IS_ERR(entry)) {
 607                 rc = PTR_ERR(entry);
 608                 CWARN("%s: error adding the reply_data file: rc = %d\n",
 609                       obd->obd_name, rc);
 610                 GOTO(destroy_new_ns, rc);
 611         }
 612
 613         entry = lprocfs_add_simple(new_stat->nid_proc, "fmd_count", new_stat,
 614                                    &lprocfs_exp_fmd_count_fops);
 615         if (IS_ERR(entry)) {
 616                 rc = PTR_ERR(entry);
 617                 CWARN("%s: error adding the fmd_count file: rc = %d\n",
 618                       obd->obd_name, rc);
 619                 GOTO(destroy_new_ns, rc);
 620         }
 621
 622         spin_lock(&exp->exp_lock);
 623         exp->exp_nid_stats = new_stat;
 624         spin_unlock(&exp->exp_lock);
 625
 626         /* protect competitive add to list, not need locking on destroy */
 627         spin_lock(&obd->obd_nid_lock);
 628         list_add(&new_stat->nid_list, &obd->obd_nid_stats);
 629         spin_unlock(&obd->obd_nid_lock);
 630
 631         RETURN(0);
 632
 633 destroy_new_ns:
 634         if (new_stat->nid_proc != NULL)
 635                 lprocfs_remove(&new_stat->nid_proc);
 636         cfs_hash_del(obd->obd_nid_stats_hash, nid, &new_stat->nid_hash);
 637
 638 destroy_new:
 639         nidstat_putref(new_stat);
 640         OBD_FREE_PTR(new_stat);
 641         RETURN(rc);
 642 }
 643 EXPORT_SYMBOL(lprocfs_exp_setup);
 644
 645 int lprocfs_exp_cleanup(struct obd_export *exp)
 646 {
 647         struct nid_stat *stat = exp->exp_nid_stats;
 648
 649         if (!stat || !exp->exp_obd)
 650                 RETURN(0);
 651
 652         nidstat_putref(exp->exp_nid_stats);
 653         exp->exp_nid_stats = NULL;
 654
 655         return 0;
 656 }
 657
 658 int lprocfs_alloc_obd_stats(struct obd_device *obd, unsigned int num_stats)
 659 {
 660         struct lprocfs_stats *stats;
 661         int rc;
 662
 663         LASSERT(obd->obd_stats == NULL);
 664         LASSERT(obd->obd_proc_entry != NULL);
 665
 666         stats = lprocfs_alloc_stats(num_stats, 0);
 667         if (stats == NULL)
 668                 return -ENOMEM;
 669
 670         rc = lprocfs_register_stats(obd->obd_proc_entry, "stats", stats);
 671         if (rc < 0)
 672                 lprocfs_free_stats(&stats);
 673         else
 674                 obd->obd_stats = stats;
 675
 676         return rc;
 677 }
 678 EXPORT_SYMBOL(lprocfs_alloc_obd_stats);
 679
 680 void lprocfs_free_obd_stats(struct obd_device *obd)
 681 {
 682         if (obd->obd_stats)
 683                 lprocfs_free_stats(&obd->obd_stats);
 684 }
 685 EXPORT_SYMBOL(lprocfs_free_obd_stats);
 686
 687 int lprocfs_hash_seq_show(struct seq_file *m, void *data)
 688 {
 689         struct obd_device *obd = m->private;
 690
 691         if (obd == NULL)
 692                 return 0;
 693
 694         /* header for rhashtable state */
 695         seq_printf(m, "%-*s   cur   min        max theta t-min t-max flags  rehash   count  maxdep distribution\n",
 696                    HASH_NAME_LEN, "name");
 697         ldebugfs_rhash_seq_show("UUID_HASH", &obd->obd_uuid_hash, m);
 698
 699         cfs_hash_debug_header(m);
 700         cfs_hash_debug_str(obd->obd_nid_hash, m);
 701         cfs_hash_debug_str(obd->obd_nid_stats_hash, m);
 702         return 0;
 703 }
 704 EXPORT_SYMBOL(lprocfs_hash_seq_show);
 705
 706 int lprocfs_recovery_status_seq_show(struct seq_file *m, void *data)
 707 {
 708         struct obd_device *obd = m->private;
 709         struct target_distribute_txn_data *tdtd;
 710
 711         LASSERT(obd != NULL);
 712
 713         seq_printf(m, "status: ");
 714         if (atomic_read(&obd->obd_max_recoverable_clients) == 0) {
 715                 seq_printf(m, "INACTIVE\n");
 716                 goto out;
 717         }
 718
 719         /* sampled unlocked, but really... */
 720         if (obd->obd_recovering == 0) {
 721                 seq_printf(m, "COMPLETE\n");
 722                 seq_printf(m, "recovery_start: %lld\n",
 723                            (s64)obd->obd_recovery_start);
 724                 seq_printf(m, "recovery_duration: %lld\n",
 725                            obd->obd_recovery_end ?
 726                            obd->obd_recovery_end - obd->obd_recovery_start :
 727                            ktime_get_real_seconds() - obd->obd_recovery_start);
 728                 /* Number of clients that have completed recovery */
 729                 seq_printf(m, "completed_clients: %d/%d\n",
 730                            atomic_read(&obd->obd_max_recoverable_clients) -
 731                            obd->obd_stale_clients,
 732                            atomic_read(&obd->obd_max_recoverable_clients));
 733                 seq_printf(m, "replayed_requests: %d\n",
 734                            obd->obd_replayed_requests);
 735                 seq_printf(m, "last_transno: %lld\n",
 736                            obd->obd_next_recovery_transno - 1);
 737                 seq_printf(m, "VBR: %s\n", obd->obd_version_recov ?
 738                            "ENABLED" : "DISABLED");
 739                 seq_printf(m, "IR: %s\n", obd->obd_no_ir ?
 740                            "DISABLED" : "ENABLED");
 741                 goto out;
 742         }
 743
 744         tdtd = obd->u.obt.obt_lut->lut_tdtd;
 745         if (tdtd && tdtd->tdtd_show_update_logs_retrievers) {
 746                 char *buf;
 747                 int size = 0;
 748                 int count = 0;
 749
 750                 buf = tdtd->tdtd_show_update_logs_retrievers(
 751                         tdtd->tdtd_show_retrievers_cbdata,
 752                         &size, &count);
 753                 if (count > 0) {
 754                         seq_printf(m, "WAITING\n");
 755                         seq_printf(m, "non-ready MDTs: %s\n",
 756                                    buf ? buf : "unknown (not enough RAM)");
 757                         seq_printf(m, "recovery_start: %lld\n",
 758                                    (s64)obd->obd_recovery_start);
 759                         seq_printf(m, "time_waited: %lld\n",
 760                                    (s64)(ktime_get_real_seconds() -
 761                                          obd->obd_recovery_start));
 762                 }
 763
 764                 if (buf != NULL)
 765                         OBD_FREE(buf, size);
 766
 767                 if (likely(count > 0))
 768                         goto out;
 769         }
 770
 771         /* recovery won't start until the clients connect */
 772         if (obd->obd_recovery_start == 0) {
 773                 seq_printf(m, "WAITING_FOR_CLIENTS\n");
 774                 goto out;
 775         }
 776
 777         seq_printf(m, "RECOVERING\n");
 778         seq_printf(m, "recovery_start: %lld\n", (s64)obd->obd_recovery_start);
 779         seq_printf(m, "time_remaining: %lld\n",
 780                    ktime_get_real_seconds() >=
 781                    obd->obd_recovery_start +
 782                    obd->obd_recovery_timeout ? 0 :
 783                    (s64)(obd->obd_recovery_start +
 784                          obd->obd_recovery_timeout -
 785                          ktime_get_real_seconds()));
 786         seq_printf(m, "connected_clients: %d/%d\n",
 787                    atomic_read(&obd->obd_connected_clients),
 788                    atomic_read(&obd->obd_max_recoverable_clients));
 789         /* Number of clients that have completed recovery */
 790         seq_printf(m, "req_replay_clients: %d\n",
 791                    atomic_read(&obd->obd_req_replay_clients));
 792         seq_printf(m, "lock_repay_clients: %d\n",
 793                    atomic_read(&obd->obd_lock_replay_clients));
 794         seq_printf(m, "completed_clients: %d\n",
 795                    atomic_read(&obd->obd_connected_clients) -
 796                    atomic_read(&obd->obd_lock_replay_clients));
 797         seq_printf(m, "evicted_clients: %d\n", obd->obd_stale_clients);
 798         seq_printf(m, "replayed_requests: %d\n", obd->obd_replayed_requests);
 799         seq_printf(m, "queued_requests: %d\n",
 800                    obd->obd_requests_queued_for_recovery);
 801         seq_printf(m, "next_transno: %lld\n",
 802                    obd->obd_next_recovery_transno);
 803 out:
 804         return 0;
 805 }
 806 EXPORT_SYMBOL(lprocfs_recovery_status_seq_show);
 807
 808 ssize_t ir_factor_show(struct kobject *kobj, struct attribute *attr,
 809                        char *buf)
 810 {
 811         struct obd_device *obd = container_of(kobj, struct obd_device,
 812                                               obd_kset.kobj);
 813
 814         return scnprintf(buf, PAGE_SIZE, "%d\n", obd->obd_recovery_ir_factor);
 815 }
 816 EXPORT_SYMBOL(ir_factor_show);
 817
 818 ssize_t ir_factor_store(struct kobject *kobj, struct attribute *attr,
 819                         const char *buffer, size_t count)
 820 {
 821         struct obd_device *obd = container_of(kobj, struct obd_device,
 822                                               obd_kset.kobj);
 823         int val;
 824         int rc;
 825
 826         rc = kstrtoint(buffer, 10, &val);
 827         if (rc)
 828                 return rc;
 829
 830         if (val < OBD_IR_FACTOR_MIN || val > OBD_IR_FACTOR_MAX)
 831                 return -EINVAL;
 832
 833         obd->obd_recovery_ir_factor = val;
 834         return count;
 835 }
 836 EXPORT_SYMBOL(ir_factor_store);
 837
 838 int lprocfs_checksum_dump_seq_show(struct seq_file *m, void *data)
 839 {
 840         struct obd_device *obd = m->private;
 841
 842         LASSERT(obd != NULL);
 843         seq_printf(m, "%d\n", obd->obd_checksum_dump);
 844         return 0;
 845 }
 846 EXPORT_SYMBOL(lprocfs_checksum_dump_seq_show);
 847
 848 ssize_t
 849 lprocfs_checksum_dump_seq_write(struct file *file, const char __user *buffer,
 850                             size_t count, loff_t *off)
 851 {
 852         struct seq_file *m = file->private_data;
 853         struct obd_device *obd = m->private;
 854         bool val;
 855         int rc;
 856
 857         LASSERT(obd != NULL);
 858         rc = kstrtobool_from_user(buffer, count, &val);
 859         if (rc)
 860                 return rc;
 861
 862         obd->obd_checksum_dump = val;
 863         return count;
 864 }
 865 EXPORT_SYMBOL(lprocfs_checksum_dump_seq_write);
 866
 867 ssize_t recovery_time_soft_show(struct kobject *kobj, struct attribute *attr,
 868                                 char *buf)
 869 {
 870         struct obd_device *obd = container_of(kobj, struct obd_device,
 871                                               obd_kset.kobj);
 872
 873         return scnprintf(buf, PAGE_SIZE, "%ld\n", obd->obd_recovery_timeout);
 874 }
 875 EXPORT_SYMBOL(recovery_time_soft_show);
 876
 877 ssize_t recovery_time_soft_store(struct kobject *kobj,
 878                                  struct attribute *attr,
 879                                  const char *buffer, size_t count)
 880 {
 881         struct obd_device *obd = container_of(kobj, struct obd_device,
 882                                               obd_kset.kobj);
 883         unsigned int val;
 884         int rc;
 885
 886         rc = kstrtouint(buffer, 0, &val);
 887         if (rc)
 888                 return rc;
 889
 890         obd->obd_recovery_timeout = val;
 891         return count;
 892 }
 893 EXPORT_SYMBOL(recovery_time_soft_store);
 894
 895 ssize_t recovery_time_hard_show(struct kobject *kobj, struct attribute *attr,
 896                                 char *buf)
 897 {
 898         struct obd_device *obd = container_of(kobj, struct obd_device,
 899                                               obd_kset.kobj);
 900
 901         return scnprintf(buf, PAGE_SIZE, "%ld\n", obd->obd_recovery_time_hard);
 902 }
 903 EXPORT_SYMBOL(recovery_time_hard_show);
 904
 905 ssize_t recovery_time_hard_store(struct kobject *kobj,
 906                                  struct attribute *attr,
 907                                  const char *buffer, size_t count)
 908 {
 909         struct obd_device *obd = container_of(kobj, struct obd_device,
 910                                               obd_kset.kobj);
 911         unsigned int val;
 912         int rc;
 913
 914         rc = kstrtouint(buffer, 0, &val);
 915         if (rc)
 916                 return rc;
 917
 918         obd->obd_recovery_time_hard = val;
 919         return count;
 920 }
 921 EXPORT_SYMBOL(recovery_time_hard_store);
 922
 923 ssize_t instance_show(struct kobject *kobj, struct attribute *attr,
 924                       char *buf)
 925 {
 926         struct obd_device *obd = container_of(kobj, struct obd_device,
 927                                               obd_kset.kobj);
 928         struct obd_device_target *target = &obd->u.obt;
 929
 930         LASSERT(target->obt_magic == OBT_MAGIC);
 931         return scnprintf(buf, PAGE_SIZE, "%u\n", obd->u.obt.obt_instance);
 932 }
 933 EXPORT_SYMBOL(instance_show);
 934
 935 #endif /* CONFIG_PROC_FS*/