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 int lprocfs_num_exports_seq_show(struct seq_file *m, void *data)
 153 {
 154         struct obd_device *obd = data;
 155
 156         LASSERT(obd != NULL);
 157         seq_printf(m, "%u\n", obd->obd_num_exports);
 158         return 0;
 159 }
 160 EXPORT_SYMBOL(lprocfs_num_exports_seq_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         return;
 262 }
 263
 264 void lprocfs_free_per_client_stats(struct obd_device *obd)
 265 {
 266         struct cfs_hash *hash = obd->obd_nid_stats_hash;
 267         struct nid_stat *stat;
 268         ENTRY;
 269
 270         /* we need extra list - because hash_exit called to early */
 271         /* not need locking because all clients is died */
 272         while (!list_empty(&obd->obd_nid_stats)) {
 273                 stat = list_entry(obd->obd_nid_stats.next,
 274                                   struct nid_stat, nid_list);
 275                 list_del_init(&stat->nid_list);
 276                 cfs_hash_del(hash, &stat->nid, &stat->nid_hash);
 277                 lprocfs_free_client_stats(stat);
 278         }
 279         EXIT;
 280 }
 281 EXPORT_SYMBOL(lprocfs_free_per_client_stats);
 282
 283 static int
 284 lprocfs_exp_print_uuid_seq(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 285                            struct hlist_node *hnode, void *cb_data)
 286 {
 287         struct seq_file *m = cb_data;
 288         struct obd_export *exp = cfs_hash_object(hs, hnode);
 289
 290         if (exp->exp_nid_stats != NULL)
 291                 seq_printf(m, "%s\n", obd_uuid2str(&exp->exp_client_uuid));
 292         return 0;
 293 }
 294
 295 static int
 296 lprocfs_exp_print_nodemap_seq(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 297                               struct hlist_node *hnode, void *cb_data)
 298 {
 299         struct seq_file *m = cb_data;
 300         struct obd_export *exp = cfs_hash_object(hs, hnode);
 301         struct lu_nodemap *nodemap = exp->exp_target_data.ted_nodemap;
 302
 303         if (nodemap != NULL)
 304                 seq_printf(m, "%s\n", nodemap->nm_name);
 305         return 0;
 306 }
 307
 308 static int
 309 lprocfs_exp_nodemap_seq_show(struct seq_file *m, void *data)
 310 {
 311         struct nid_stat *stats = m->private;
 312         struct obd_device *obd = stats->nid_obd;
 313
 314         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
 315                               lprocfs_exp_print_nodemap_seq, m);
 316         return 0;
 317 }
 318 LPROC_SEQ_FOPS_RO(lprocfs_exp_nodemap);
 319
 320 static int lprocfs_exp_uuid_seq_show(struct seq_file *m, void *data)
 321 {
 322         struct nid_stat *stats = m->private;
 323         struct obd_device *obd = stats->nid_obd;
 324
 325         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
 326                                 lprocfs_exp_print_uuid_seq, m);
 327         return 0;
 328 }
 329 LPROC_SEQ_FOPS_RO(lprocfs_exp_uuid);
 330
 331 static int
 332 lprocfs_exp_print_hash_seq(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 333                            struct hlist_node *hnode, void *cb_data)
 334
 335 {
 336         struct seq_file *m = cb_data;
 337         struct obd_export *exp = cfs_hash_object(hs, hnode);
 338
 339         if (exp->exp_lock_hash != NULL) {
 340                 cfs_hash_debug_header(m);
 341                 cfs_hash_debug_str(hs, m);
 342         }
 343         return 0;
 344 }
 345
 346 static int lprocfs_exp_hash_seq_show(struct seq_file *m, void *data)
 347 {
 348         struct nid_stat *stats = m->private;
 349         struct obd_device *obd = stats->nid_obd;
 350
 351         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
 352                                 lprocfs_exp_print_hash_seq, m);
 353         return 0;
 354 }
 355 LPROC_SEQ_FOPS_RO(lprocfs_exp_hash);
 356
 357 int lprocfs_exp_print_replydata_seq(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 358                                     struct hlist_node *hnode, void *cb_data)
 359
 360 {
 361         struct obd_export *exp = cfs_hash_object(hs, hnode);
 362         struct seq_file *m = cb_data;
 363         struct tg_export_data *ted = &exp->exp_target_data;
 364
 365         seq_printf(m, "reply_cnt: %d\n"
 366                    "reply_max: %d\n"
 367                    "reply_released_by_xid: %d\n"
 368                    "reply_released_by_tag: %d\n\n",
 369                    ted->ted_reply_cnt,
 370                    ted->ted_reply_max,
 371                    ted->ted_release_xid,
 372                    ted->ted_release_tag);
 373         return 0;
 374 }
 375
 376 int lprocfs_exp_replydata_seq_show(struct seq_file *m, void *data)
 377 {
 378         struct nid_stat *stats = m->private;
 379         struct obd_device *obd = stats->nid_obd;
 380
 381         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
 382                                 lprocfs_exp_print_replydata_seq, m);
 383         return 0;
 384 }
 385 LPROC_SEQ_FOPS_RO(lprocfs_exp_replydata);
 386
 387 int lprocfs_nid_stats_clear_seq_show(struct seq_file *m, void *data)
 388 {
 389         seq_puts(m, "Write into this file to clear all nid stats and stale nid entries\n");
 390         return 0;
 391 }
 392 EXPORT_SYMBOL(lprocfs_nid_stats_clear_seq_show);
 393
 394 static int lprocfs_nid_stats_clear_write_cb(void *obj, void *data)
 395 {
 396         struct nid_stat *stat = obj;
 397         ENTRY;
 398
 399         CDEBUG(D_INFO, "refcnt %d\n", atomic_read(&stat->nid_exp_ref_count));
 400         if (atomic_read(&stat->nid_exp_ref_count) == 1) {
 401                 /* object has only hash references. */
 402                 spin_lock(&stat->nid_obd->obd_nid_lock);
 403                 list_move(&stat->nid_list, data);
 404                 spin_unlock(&stat->nid_obd->obd_nid_lock);
 405                 RETURN(1);
 406         }
 407         /* we has reference to object - only clear data*/
 408         if (stat->nid_stats)
 409                 lprocfs_clear_stats(stat->nid_stats);
 410
 411         RETURN(0);
 412 }
 413
 414 ssize_t
 415 lprocfs_nid_stats_clear_seq_write(struct file *file, const char __user *buffer,
 416                                         size_t count, loff_t *off)
 417 {
 418         struct seq_file *m = file->private_data;
 419         struct obd_device *obd = m->private;
 420         struct nid_stat *client_stat;
 421         struct list_head free_list;
 422
 423         INIT_LIST_HEAD(&free_list);
 424         cfs_hash_cond_del(obd->obd_nid_stats_hash,
 425                           lprocfs_nid_stats_clear_write_cb, &free_list);
 426
 427         while (!list_empty(&free_list)) {
 428                 client_stat = list_entry(free_list.next, struct nid_stat,
 429                                          nid_list);
 430                 list_del_init(&client_stat->nid_list);
 431                 lprocfs_free_client_stats(client_stat);
 432         }
 433         return count;
 434 }
 435 EXPORT_SYMBOL(lprocfs_nid_stats_clear_seq_write);
 436
 437 int lprocfs_exp_setup(struct obd_export *exp, lnet_nid_t *nid)
 438 {
 439         struct nid_stat *new_stat, *old_stat;
 440         struct obd_device *obd = NULL;
 441         struct proc_dir_entry *entry;
 442         char nidstr[LNET_NIDSTR_SIZE];
 443         int rc = 0;
 444         ENTRY;
 445
 446         if (!exp || !exp->exp_obd || !exp->exp_obd->obd_proc_exports_entry ||
 447             !exp->exp_obd->obd_nid_stats_hash)
 448                 RETURN(-EINVAL);
 449
 450         /* not test against zero because eric say:
 451          * You may only test nid against another nid, or LNET_NID_ANY.
 452          * Anything else is nonsense.*/
 453         if (nid == NULL || *nid == LNET_NID_ANY)
 454                 RETURN(-EALREADY);
 455
 456         libcfs_nid2str_r(*nid, nidstr, sizeof(nidstr));
 457
 458         spin_lock(&exp->exp_lock);
 459         if (exp->exp_nid_stats != NULL) {
 460                 spin_unlock(&exp->exp_lock);
 461                 RETURN(-EALREADY);
 462         }
 463         spin_unlock(&exp->exp_lock);
 464
 465         obd = exp->exp_obd;
 466
 467         CDEBUG(D_CONFIG, "using hash %p\n", obd->obd_nid_stats_hash);
 468
 469         OBD_ALLOC_PTR(new_stat);
 470         if (new_stat == NULL)
 471                 RETURN(-ENOMEM);
 472
 473         new_stat->nid     = *nid;
 474         new_stat->nid_obd = exp->exp_obd;
 475         /* we need set default refcount to 1 to balance obd_disconnect */
 476         atomic_set(&new_stat->nid_exp_ref_count, 1);
 477
 478         old_stat = cfs_hash_findadd_unique(obd->obd_nid_stats_hash,
 479                                            nid, &new_stat->nid_hash);
 480         CDEBUG(D_INFO, "Found stats %p for nid %s - ref %d\n",
 481                old_stat, nidstr, atomic_read(&old_stat->nid_exp_ref_count));
 482
 483         /* Return -EALREADY here so that we know that the /proc
 484          * entry already has been created */
 485         if (old_stat != new_stat) {
 486                 spin_lock(&exp->exp_lock);
 487                 if (exp->exp_nid_stats) {
 488                         LASSERT(exp->exp_nid_stats == old_stat);
 489                         nidstat_putref(exp->exp_nid_stats);
 490                 }
 491                 exp->exp_nid_stats = old_stat;
 492                 spin_unlock(&exp->exp_lock);
 493                 GOTO(destroy_new, rc = -EALREADY);
 494         }
 495         /* not found - create */
 496         new_stat->nid_proc = lprocfs_register(nidstr,
 497                                               obd->obd_proc_exports_entry,
 498                                               NULL, NULL);
 499
 500         if (IS_ERR(new_stat->nid_proc)) {
 501                 rc = PTR_ERR(new_stat->nid_proc);
 502                 new_stat->nid_proc = NULL;
 503                 CERROR("%s: cannot create proc entry for export %s: rc = %d\n",
 504                        obd->obd_name, nidstr, rc);
 505                 GOTO(destroy_new_ns, rc);
 506         }
 507
 508         entry = lprocfs_add_simple(new_stat->nid_proc, "nodemap", new_stat,
 509                                    &lprocfs_exp_nodemap_fops);
 510         if (IS_ERR(entry)) {
 511                 rc = PTR_ERR(entry);
 512                 CWARN("%s: error adding the nodemap file: rc = %d\n",
 513                       obd->obd_name, rc);
 514                 GOTO(destroy_new_ns, rc);
 515         }
 516
 517         entry = lprocfs_add_simple(new_stat->nid_proc, "uuid", new_stat,
 518                                    &lprocfs_exp_uuid_fops);
 519         if (IS_ERR(entry)) {
 520                 rc = PTR_ERR(entry);
 521                 CWARN("%s: error adding the NID stats file: rc = %d\n",
 522                       obd->obd_name, rc);
 523                 GOTO(destroy_new_ns, rc);
 524         }
 525
 526         entry = lprocfs_add_simple(new_stat->nid_proc, "hash", new_stat,
 527                                    &lprocfs_exp_hash_fops);
 528         if (IS_ERR(entry)) {
 529                 rc = PTR_ERR(entry);
 530                 CWARN("%s: error adding the hash file: rc = %d\n",
 531                       obd->obd_name, rc);
 532                 GOTO(destroy_new_ns, rc);
 533         }
 534
 535         entry = lprocfs_add_simple(new_stat->nid_proc, "export",
 536                                    new_stat, &lprocfs_exp_export_fops);
 537         if (IS_ERR(entry)) {
 538                 rc = PTR_ERR(entry);
 539                 CWARN("%s: error adding the export file: rc = %d\n",
 540                       obd->obd_name, rc);
 541                 GOTO(destroy_new_ns, rc);
 542         }
 543
 544         entry = lprocfs_add_simple(new_stat->nid_proc, "reply_data", new_stat,
 545                                    &lprocfs_exp_replydata_fops);
 546         if (IS_ERR(entry)) {
 547                 rc = PTR_ERR(entry);
 548                 CWARN("%s: error adding the reply_data file: rc = %d\n",
 549                       obd->obd_name, rc);
 550                 GOTO(destroy_new_ns, rc);
 551         }
 552
 553         spin_lock(&exp->exp_lock);
 554         exp->exp_nid_stats = new_stat;
 555         spin_unlock(&exp->exp_lock);
 556
 557         /* protect competitive add to list, not need locking on destroy */
 558         spin_lock(&obd->obd_nid_lock);
 559         list_add(&new_stat->nid_list, &obd->obd_nid_stats);
 560         spin_unlock(&obd->obd_nid_lock);
 561
 562         RETURN(0);
 563
 564 destroy_new_ns:
 565         if (new_stat->nid_proc != NULL)
 566                 lprocfs_remove(&new_stat->nid_proc);
 567         cfs_hash_del(obd->obd_nid_stats_hash, nid, &new_stat->nid_hash);
 568
 569 destroy_new:
 570         nidstat_putref(new_stat);
 571         OBD_FREE_PTR(new_stat);
 572         RETURN(rc);
 573 }
 574 EXPORT_SYMBOL(lprocfs_exp_setup);
 575
 576 int lprocfs_exp_cleanup(struct obd_export *exp)
 577 {
 578         struct nid_stat *stat = exp->exp_nid_stats;
 579
 580         if (!stat || !exp->exp_obd)
 581                 RETURN(0);
 582
 583         nidstat_putref(exp->exp_nid_stats);
 584         exp->exp_nid_stats = NULL;
 585
 586         return 0;
 587 }
 588
 589 int lprocfs_alloc_obd_stats(struct obd_device *obd, unsigned int num_stats)
 590 {
 591         struct lprocfs_stats *stats;
 592         int rc;
 593
 594         LASSERT(obd->obd_stats == NULL);
 595         LASSERT(obd->obd_proc_entry != NULL);
 596
 597         stats = lprocfs_alloc_stats(num_stats, 0);
 598         if (stats == NULL)
 599                 return -ENOMEM;
 600
 601         rc = lprocfs_register_stats(obd->obd_proc_entry, "stats", stats);
 602         if (rc < 0)
 603                 lprocfs_free_stats(&stats);
 604         else
 605                 obd->obd_stats = stats;
 606
 607         return rc;
 608 }
 609 EXPORT_SYMBOL(lprocfs_alloc_obd_stats);
 610
 611 void lprocfs_free_obd_stats(struct obd_device *obd)
 612 {
 613         if (obd->obd_stats)
 614                 lprocfs_free_stats(&obd->obd_stats);
 615 }
 616 EXPORT_SYMBOL(lprocfs_free_obd_stats);
 617
 618 int lprocfs_hash_seq_show(struct seq_file *m, void *data)
 619 {
 620         struct obd_device *obd = m->private;
 621
 622         if (obd == NULL)
 623                 return 0;
 624
 625         cfs_hash_debug_header(m);
 626         cfs_hash_debug_str(obd->obd_uuid_hash, m);
 627         cfs_hash_debug_str(obd->obd_nid_hash, m);
 628         cfs_hash_debug_str(obd->obd_nid_stats_hash, m);
 629         return 0;
 630 }
 631 EXPORT_SYMBOL(lprocfs_hash_seq_show);
 632
 633 int lprocfs_recovery_status_seq_show(struct seq_file *m, void *data)
 634 {
 635         struct obd_device *obd = m->private;
 636         struct target_distribute_txn_data *tdtd;
 637
 638         LASSERT(obd != NULL);
 639
 640         seq_printf(m, "status: ");
 641         if (obd->obd_max_recoverable_clients == 0) {
 642                 seq_printf(m, "INACTIVE\n");
 643                 goto out;
 644         }
 645
 646         /* sampled unlocked, but really... */
 647         if (obd->obd_recovering == 0) {
 648                 seq_printf(m, "COMPLETE\n");
 649                 seq_printf(m, "recovery_start: %lld\n",
 650                            (s64)obd->obd_recovery_start);
 651                 seq_printf(m, "recovery_duration: %lld\n",
 652                            obd->obd_recovery_end ?
 653                            obd->obd_recovery_end - obd->obd_recovery_start :
 654                            ktime_get_real_seconds() - obd->obd_recovery_start);
 655                 /* Number of clients that have completed recovery */
 656                 seq_printf(m, "completed_clients: %d/%d\n",
 657                            obd->obd_max_recoverable_clients -
 658                            obd->obd_stale_clients,
 659                            obd->obd_max_recoverable_clients);
 660                 seq_printf(m, "replayed_requests: %d\n",
 661                            obd->obd_replayed_requests);
 662                 seq_printf(m, "last_transno: %lld\n",
 663                            obd->obd_next_recovery_transno - 1);
 664                 seq_printf(m, "VBR: %s\n", obd->obd_version_recov ?
 665                            "ENABLED" : "DISABLED");
 666                 seq_printf(m, "IR: %s\n", obd->obd_no_ir ?
 667                            "DISABLED" : "ENABLED");
 668                 goto out;
 669         }
 670
 671         tdtd = obd->u.obt.obt_lut->lut_tdtd;
 672         if (tdtd && tdtd->tdtd_show_update_logs_retrievers) {
 673                 char *buf;
 674                 int size = 0;
 675                 int count = 0;
 676
 677                 buf = tdtd->tdtd_show_update_logs_retrievers(
 678                         tdtd->tdtd_show_retrievers_cbdata,
 679                         &size, &count);
 680                 if (count > 0) {
 681                         seq_printf(m, "WAITING\n");
 682                         seq_printf(m, "non-ready MDTs: %s\n",
 683                                    buf ? buf : "unknown (not enough RAM)");
 684                         seq_printf(m, "recovery_start: %lld\n",
 685                                    (s64)obd->obd_recovery_start);
 686                         seq_printf(m, "time_waited: %lld\n",
 687                                    (s64)(ktime_get_real_seconds() -
 688                                          obd->obd_recovery_start));
 689                 }
 690
 691                 if (buf != NULL)
 692                         OBD_FREE(buf, size);
 693
 694                 if (likely(count > 0))
 695                         goto out;
 696         }
 697
 698         /* recovery won't start until the clients connect */
 699         if (obd->obd_recovery_start == 0) {
 700                 seq_printf(m, "WAITING_FOR_CLIENTS\n");
 701                 goto out;
 702         }
 703
 704         seq_printf(m, "RECOVERING\n");
 705         seq_printf(m, "recovery_start: %lld\n", (s64)obd->obd_recovery_start);
 706         seq_printf(m, "time_remaining: %lld\n",
 707                    ktime_get_real_seconds() >=
 708                    obd->obd_recovery_start +
 709                    obd->obd_recovery_timeout ? 0 :
 710                    (s64)(obd->obd_recovery_start +
 711                          obd->obd_recovery_timeout -
 712                          ktime_get_real_seconds()));
 713         seq_printf(m, "connected_clients: %d/%d\n",
 714                    atomic_read(&obd->obd_connected_clients),
 715                    obd->obd_max_recoverable_clients);
 716         /* Number of clients that have completed recovery */
 717         seq_printf(m, "req_replay_clients: %d\n",
 718                    atomic_read(&obd->obd_req_replay_clients));
 719         seq_printf(m, "lock_repay_clients: %d\n",
 720                    atomic_read(&obd->obd_lock_replay_clients));
 721         seq_printf(m, "completed_clients: %d\n",
 722                    atomic_read(&obd->obd_connected_clients) -
 723                    atomic_read(&obd->obd_lock_replay_clients));
 724         seq_printf(m, "evicted_clients: %d\n", obd->obd_stale_clients);
 725         seq_printf(m, "replayed_requests: %d\n", obd->obd_replayed_requests);
 726         seq_printf(m, "queued_requests: %d\n",
 727                    obd->obd_requests_queued_for_recovery);
 728         seq_printf(m, "next_transno: %lld\n",
 729                    obd->obd_next_recovery_transno);
 730 out:
 731         return 0;
 732 }
 733 EXPORT_SYMBOL(lprocfs_recovery_status_seq_show);
 734
 735 int lprocfs_ir_factor_seq_show(struct seq_file *m, void *data)
 736 {
 737         struct obd_device *obd = m->private;
 738
 739         LASSERT(obd != NULL);
 740         seq_printf(m, "%d\n", obd->obd_recovery_ir_factor);
 741         return 0;
 742 }
 743 EXPORT_SYMBOL(lprocfs_ir_factor_seq_show);
 744
 745 ssize_t
 746 lprocfs_ir_factor_seq_write(struct file *file, const char __user *buffer,
 747                             size_t count, loff_t *off)
 748 {
 749         struct seq_file *m = file->private_data;
 750         struct obd_device *obd = m->private;
 751         int val;
 752         int rc;
 753
 754         LASSERT(obd != NULL);
 755         rc = kstrtoint_from_user(buffer, count, 10, &val);
 756         if (rc)
 757                 return rc;
 758
 759         if (val < OBD_IR_FACTOR_MIN || val > OBD_IR_FACTOR_MAX)
 760                 return -EINVAL;
 761
 762         obd->obd_recovery_ir_factor = val;
 763         return count;
 764 }
 765 EXPORT_SYMBOL(lprocfs_ir_factor_seq_write);
 766
 767 int lprocfs_checksum_dump_seq_show(struct seq_file *m, void *data)
 768 {
 769         struct obd_device *obd = m->private;
 770
 771         LASSERT(obd != NULL);
 772         seq_printf(m, "%d\n", obd->obd_checksum_dump);
 773         return 0;
 774 }
 775 EXPORT_SYMBOL(lprocfs_checksum_dump_seq_show);
 776
 777 ssize_t
 778 lprocfs_checksum_dump_seq_write(struct file *file, const char __user *buffer,
 779                             size_t count, loff_t *off)
 780 {
 781         struct seq_file *m = file->private_data;
 782         struct obd_device *obd = m->private;
 783         bool val;
 784         int rc;
 785
 786         LASSERT(obd != NULL);
 787         rc = kstrtobool_from_user(buffer, count, &val);
 788         if (rc)
 789                 return rc;
 790
 791         obd->obd_checksum_dump = val;
 792         return count;
 793 }
 794 EXPORT_SYMBOL(lprocfs_checksum_dump_seq_write);
 795
 796 int lprocfs_recovery_time_soft_seq_show(struct seq_file *m, void *data)
 797 {
 798         struct obd_device *obd = m->private;
 799
 800         LASSERT(obd != NULL);
 801         seq_printf(m, "%llu\n", obd->obd_recovery_timeout);
 802         return 0;
 803 }
 804 EXPORT_SYMBOL(lprocfs_recovery_time_soft_seq_show);
 805
 806 ssize_t
 807 lprocfs_recovery_time_soft_seq_write(struct file *file,
 808                                      const char __user *buffer,
 809                                      size_t count, loff_t *off)
 810 {
 811         struct seq_file *m = file->private_data;
 812         struct obd_device *obd = m->private;
 813         unsigned int val;
 814         int rc;
 815
 816         LASSERT(obd != NULL);
 817         rc = kstrtouint_from_user(buffer, count, 0, &val);
 818         if (rc)
 819                 return rc;
 820
 821         obd->obd_recovery_timeout = val;
 822         return count;
 823 }
 824 EXPORT_SYMBOL(lprocfs_recovery_time_soft_seq_write);
 825
 826 int lprocfs_recovery_time_hard_seq_show(struct seq_file *m, void *data)
 827 {
 828         struct obd_device *obd = m->private;
 829
 830         LASSERT(obd != NULL);
 831         seq_printf(m, "%lld\n", obd->obd_recovery_time_hard);
 832         return 0;
 833 }
 834 EXPORT_SYMBOL(lprocfs_recovery_time_hard_seq_show);
 835
 836 ssize_t
 837 lprocfs_recovery_time_hard_seq_write(struct file *file,
 838                                      const char __user *buffer,
 839                                      size_t count, loff_t *off)
 840 {
 841         struct seq_file *m = file->private_data;
 842         struct obd_device *obd = m->private;
 843         unsigned int val;
 844         int rc;
 845
 846         LASSERT(obd != NULL);
 847         rc = kstrtouint_from_user(buffer, count, 0, &val);
 848         if (rc)
 849                 return rc;
 850
 851         obd->obd_recovery_time_hard = val;
 852         return count;
 853 }
 854 EXPORT_SYMBOL(lprocfs_recovery_time_hard_seq_write);
 855
 856 int lprocfs_target_instance_seq_show(struct seq_file *m, void *data)
 857 {
 858         struct obd_device *obd = m->private;
 859         struct obd_device_target *target = &obd->u.obt;
 860
 861         LASSERT(obd != NULL);
 862         LASSERT(target->obt_magic == OBT_MAGIC);
 863         seq_printf(m, "%u\n", obd->u.obt.obt_instance);
 864         return 0;
 865 }
 866 EXPORT_SYMBOL(lprocfs_target_instance_seq_show);
 867
 868 #endif /* CONFIG_PROC_FS*/