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 static int
 331 lprocfs_exp_print_hash_seq(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 332                            struct hlist_node *hnode, void *cb_data)
 333
 334 {
 335         struct seq_file *m = cb_data;
 336         struct obd_export *exp = cfs_hash_object(hs, hnode);
 337
 338         if (exp->exp_lock_hash != NULL) {
 339                 cfs_hash_debug_header(m);
 340                 cfs_hash_debug_str(hs, m);
 341         }
 342         return 0;
 343 }
 344
 345 static int lprocfs_exp_hash_seq_show(struct seq_file *m, void *data)
 346 {
 347         struct nid_stat *stats = m->private;
 348         struct obd_device *obd = stats->nid_obd;
 349
 350         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
 351                                 lprocfs_exp_print_hash_seq, m);
 352         return 0;
 353 }
 354 LPROC_SEQ_FOPS_RO(lprocfs_exp_hash);
 355
 356 int lprocfs_exp_print_replydata_seq(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 357                                     struct hlist_node *hnode, void *cb_data)
 358
 359 {
 360         struct obd_export *exp = cfs_hash_object(hs, hnode);
 361         struct seq_file *m = cb_data;
 362         struct tg_export_data *ted = &exp->exp_target_data;
 363
 364         seq_printf(m, "reply_cnt: %d\n"
 365                    "reply_max: %d\n"
 366                    "reply_released_by_xid: %d\n"
 367                    "reply_released_by_tag: %d\n\n",
 368                    ted->ted_reply_cnt,
 369                    ted->ted_reply_max,
 370                    ted->ted_release_xid,
 371                    ted->ted_release_tag);
 372         return 0;
 373 }
 374
 375 int lprocfs_exp_replydata_seq_show(struct seq_file *m, void *data)
 376 {
 377         struct nid_stat *stats = m->private;
 378         struct obd_device *obd = stats->nid_obd;
 379
 380         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
 381                                 lprocfs_exp_print_replydata_seq, m);
 382         return 0;
 383 }
 384 LPROC_SEQ_FOPS_RO(lprocfs_exp_replydata);
 385
 386 int lprocfs_exp_print_fmd_count_seq(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 387                                     struct hlist_node *hnode, void *cb_data)
 388
 389 {
 390         struct obd_export *exp = cfs_hash_object(hs, hnode);
 391         struct seq_file *m = cb_data;
 392         struct tg_export_data *ted = &exp->exp_target_data;
 393
 394         seq_printf(m, "%d\n", ted->ted_fmd_count);
 395
 396         return 0;
 397 }
 398
 399 int lprocfs_exp_fmd_count_seq_show(struct seq_file *m, void *data)
 400 {
 401         struct nid_stat *stats = m->private;
 402         struct obd_device *obd = stats->nid_obd;
 403
 404         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
 405                               lprocfs_exp_print_fmd_count_seq, m);
 406         return 0;
 407 }
 408 LPROC_SEQ_FOPS_RO(lprocfs_exp_fmd_count);
 409
 410 int lprocfs_nid_stats_clear_seq_show(struct seq_file *m, void *data)
 411 {
 412         seq_puts(m, "Write into this file to clear all nid stats and stale nid entries\n");
 413         return 0;
 414 }
 415 EXPORT_SYMBOL(lprocfs_nid_stats_clear_seq_show);
 416
 417 static int lprocfs_nid_stats_clear_write_cb(void *obj, void *data)
 418 {
 419         struct nid_stat *stat = obj;
 420         ENTRY;
 421
 422         CDEBUG(D_INFO, "refcnt %d\n", atomic_read(&stat->nid_exp_ref_count));
 423         if (atomic_read(&stat->nid_exp_ref_count) == 1) {
 424                 /* object has only hash references. */
 425                 spin_lock(&stat->nid_obd->obd_nid_lock);
 426                 list_move(&stat->nid_list, data);
 427                 spin_unlock(&stat->nid_obd->obd_nid_lock);
 428                 RETURN(1);
 429         }
 430         /* we has reference to object - only clear data*/
 431         if (stat->nid_stats)
 432                 lprocfs_clear_stats(stat->nid_stats);
 433
 434         RETURN(0);
 435 }
 436
 437 ssize_t
 438 lprocfs_nid_stats_clear_seq_write(struct file *file, const char __user *buffer,
 439                                         size_t count, loff_t *off)
 440 {
 441         struct seq_file *m = file->private_data;
 442         struct obd_device *obd = m->private;
 443         struct nid_stat *client_stat;
 444         struct list_head free_list;
 445
 446         INIT_LIST_HEAD(&free_list);
 447         cfs_hash_cond_del(obd->obd_nid_stats_hash,
 448                           lprocfs_nid_stats_clear_write_cb, &free_list);
 449
 450         while (!list_empty(&free_list)) {
 451                 client_stat = list_entry(free_list.next, struct nid_stat,
 452                                          nid_list);
 453                 list_del_init(&client_stat->nid_list);
 454                 lprocfs_free_client_stats(client_stat);
 455         }
 456         return count;
 457 }
 458 EXPORT_SYMBOL(lprocfs_nid_stats_clear_seq_write);
 459
 460 int lprocfs_exp_setup(struct obd_export *exp, lnet_nid_t *nid)
 461 {
 462         struct nid_stat *new_stat, *old_stat;
 463         struct obd_device *obd = NULL;
 464         struct proc_dir_entry *entry;
 465         char nidstr[LNET_NIDSTR_SIZE];
 466         int rc = 0;
 467         ENTRY;
 468
 469         if (!exp || !exp->exp_obd || !exp->exp_obd->obd_proc_exports_entry ||
 470             !exp->exp_obd->obd_nid_stats_hash)
 471                 RETURN(-EINVAL);
 472
 473         /* not test against zero because eric say:
 474          * You may only test nid against another nid, or LNET_NID_ANY.
 475          * Anything else is nonsense.*/
 476         if (nid == NULL || *nid == LNET_NID_ANY)
 477                 RETURN(-EALREADY);
 478
 479         libcfs_nid2str_r(*nid, nidstr, sizeof(nidstr));
 480
 481         spin_lock(&exp->exp_lock);
 482         if (exp->exp_nid_stats != NULL) {
 483                 spin_unlock(&exp->exp_lock);
 484                 RETURN(-EALREADY);
 485         }
 486         spin_unlock(&exp->exp_lock);
 487
 488         obd = exp->exp_obd;
 489
 490         CDEBUG(D_CONFIG, "using hash %p\n", obd->obd_nid_stats_hash);
 491
 492         OBD_ALLOC_PTR(new_stat);
 493         if (new_stat == NULL)
 494                 RETURN(-ENOMEM);
 495
 496         new_stat->nid     = *nid;
 497         new_stat->nid_obd = exp->exp_obd;
 498         /* we need set default refcount to 1 to balance obd_disconnect */
 499         atomic_set(&new_stat->nid_exp_ref_count, 1);
 500
 501         old_stat = cfs_hash_findadd_unique(obd->obd_nid_stats_hash,
 502                                            nid, &new_stat->nid_hash);
 503         CDEBUG(D_INFO, "Found stats %p for nid %s - ref %d\n",
 504                old_stat, nidstr, atomic_read(&old_stat->nid_exp_ref_count));
 505
 506         /* Return -EALREADY here so that we know that the /proc
 507          * entry already has been created */
 508         if (old_stat != new_stat) {
 509                 spin_lock(&exp->exp_lock);
 510                 if (exp->exp_nid_stats) {
 511                         LASSERT(exp->exp_nid_stats == old_stat);
 512                         nidstat_putref(exp->exp_nid_stats);
 513                 }
 514                 exp->exp_nid_stats = old_stat;
 515                 spin_unlock(&exp->exp_lock);
 516                 GOTO(destroy_new, rc = -EALREADY);
 517         }
 518         /* not found - create */
 519         new_stat->nid_proc = lprocfs_register(nidstr,
 520                                               obd->obd_proc_exports_entry,
 521                                               NULL, NULL);
 522
 523         if (IS_ERR(new_stat->nid_proc)) {
 524                 rc = PTR_ERR(new_stat->nid_proc);
 525                 new_stat->nid_proc = NULL;
 526                 CERROR("%s: cannot create proc entry for export %s: rc = %d\n",
 527                        obd->obd_name, nidstr, rc);
 528                 GOTO(destroy_new_ns, rc);
 529         }
 530
 531         entry = lprocfs_add_simple(new_stat->nid_proc, "nodemap", new_stat,
 532                                    &lprocfs_exp_nodemap_fops);
 533         if (IS_ERR(entry)) {
 534                 rc = PTR_ERR(entry);
 535                 CWARN("%s: error adding the nodemap file: rc = %d\n",
 536                       obd->obd_name, rc);
 537                 GOTO(destroy_new_ns, rc);
 538         }
 539
 540         entry = lprocfs_add_simple(new_stat->nid_proc, "uuid", new_stat,
 541                                    &lprocfs_exp_uuid_fops);
 542         if (IS_ERR(entry)) {
 543                 rc = PTR_ERR(entry);
 544                 CWARN("%s: error adding the NID stats file: rc = %d\n",
 545                       obd->obd_name, rc);
 546                 GOTO(destroy_new_ns, rc);
 547         }
 548
 549         entry = lprocfs_add_simple(new_stat->nid_proc, "hash", new_stat,
 550                                    &lprocfs_exp_hash_fops);
 551         if (IS_ERR(entry)) {
 552                 rc = PTR_ERR(entry);
 553                 CWARN("%s: error adding the hash file: rc = %d\n",
 554                       obd->obd_name, rc);
 555                 GOTO(destroy_new_ns, rc);
 556         }
 557
 558         entry = lprocfs_add_simple(new_stat->nid_proc, "export",
 559                                    new_stat, &lprocfs_exp_export_fops);
 560         if (IS_ERR(entry)) {
 561                 rc = PTR_ERR(entry);
 562                 CWARN("%s: error adding the export file: rc = %d\n",
 563                       obd->obd_name, rc);
 564                 GOTO(destroy_new_ns, rc);
 565         }
 566
 567         entry = lprocfs_add_simple(new_stat->nid_proc, "reply_data", new_stat,
 568                                    &lprocfs_exp_replydata_fops);
 569         if (IS_ERR(entry)) {
 570                 rc = PTR_ERR(entry);
 571                 CWARN("%s: error adding the reply_data file: rc = %d\n",
 572                       obd->obd_name, rc);
 573                 GOTO(destroy_new_ns, rc);
 574         }
 575
 576         entry = lprocfs_add_simple(new_stat->nid_proc, "fmd_count", new_stat,
 577                                    &lprocfs_exp_fmd_count_fops);
 578         if (IS_ERR(entry)) {
 579                 rc = PTR_ERR(entry);
 580                 CWARN("%s: error adding the fmd_count file: rc = %d\n",
 581                       obd->obd_name, rc);
 582                 GOTO(destroy_new_ns, rc);
 583         }
 584
 585         spin_lock(&exp->exp_lock);
 586         exp->exp_nid_stats = new_stat;
 587         spin_unlock(&exp->exp_lock);
 588
 589         /* protect competitive add to list, not need locking on destroy */
 590         spin_lock(&obd->obd_nid_lock);
 591         list_add(&new_stat->nid_list, &obd->obd_nid_stats);
 592         spin_unlock(&obd->obd_nid_lock);
 593
 594         RETURN(0);
 595
 596 destroy_new_ns:
 597         if (new_stat->nid_proc != NULL)
 598                 lprocfs_remove(&new_stat->nid_proc);
 599         cfs_hash_del(obd->obd_nid_stats_hash, nid, &new_stat->nid_hash);
 600
 601 destroy_new:
 602         nidstat_putref(new_stat);
 603         OBD_FREE_PTR(new_stat);
 604         RETURN(rc);
 605 }
 606 EXPORT_SYMBOL(lprocfs_exp_setup);
 607
 608 int lprocfs_exp_cleanup(struct obd_export *exp)
 609 {
 610         struct nid_stat *stat = exp->exp_nid_stats;
 611
 612         if (!stat || !exp->exp_obd)
 613                 RETURN(0);
 614
 615         nidstat_putref(exp->exp_nid_stats);
 616         exp->exp_nid_stats = NULL;
 617
 618         return 0;
 619 }
 620
 621 int lprocfs_alloc_obd_stats(struct obd_device *obd, unsigned int num_stats)
 622 {
 623         struct lprocfs_stats *stats;
 624         int rc;
 625
 626         LASSERT(obd->obd_stats == NULL);
 627         LASSERT(obd->obd_proc_entry != NULL);
 628
 629         stats = lprocfs_alloc_stats(num_stats, 0);
 630         if (stats == NULL)
 631                 return -ENOMEM;
 632
 633         rc = lprocfs_register_stats(obd->obd_proc_entry, "stats", stats);
 634         if (rc < 0)
 635                 lprocfs_free_stats(&stats);
 636         else
 637                 obd->obd_stats = stats;
 638
 639         return rc;
 640 }
 641 EXPORT_SYMBOL(lprocfs_alloc_obd_stats);
 642
 643 void lprocfs_free_obd_stats(struct obd_device *obd)
 644 {
 645         if (obd->obd_stats)
 646                 lprocfs_free_stats(&obd->obd_stats);
 647 }
 648 EXPORT_SYMBOL(lprocfs_free_obd_stats);
 649
 650 int lprocfs_hash_seq_show(struct seq_file *m, void *data)
 651 {
 652         struct obd_device *obd = m->private;
 653
 654         if (obd == NULL)
 655                 return 0;
 656
 657         cfs_hash_debug_header(m);
 658         cfs_hash_debug_str(obd->obd_uuid_hash, m);
 659         cfs_hash_debug_str(obd->obd_nid_hash, m);
 660         cfs_hash_debug_str(obd->obd_nid_stats_hash, m);
 661         return 0;
 662 }
 663 EXPORT_SYMBOL(lprocfs_hash_seq_show);
 664
 665 int lprocfs_recovery_status_seq_show(struct seq_file *m, void *data)
 666 {
 667         struct obd_device *obd = m->private;
 668         struct target_distribute_txn_data *tdtd;
 669
 670         LASSERT(obd != NULL);
 671
 672         seq_printf(m, "status: ");
 673         if (atomic_read(&obd->obd_max_recoverable_clients) == 0) {
 674                 seq_printf(m, "INACTIVE\n");
 675                 goto out;
 676         }
 677
 678         /* sampled unlocked, but really... */
 679         if (obd->obd_recovering == 0) {
 680                 seq_printf(m, "COMPLETE\n");
 681                 seq_printf(m, "recovery_start: %lld\n",
 682                            (s64)obd->obd_recovery_start);
 683                 seq_printf(m, "recovery_duration: %lld\n",
 684                            obd->obd_recovery_end ?
 685                            obd->obd_recovery_end - obd->obd_recovery_start :
 686                            ktime_get_real_seconds() - obd->obd_recovery_start);
 687                 /* Number of clients that have completed recovery */
 688                 seq_printf(m, "completed_clients: %d/%d\n",
 689                            atomic_read(&obd->obd_max_recoverable_clients) -
 690                            obd->obd_stale_clients,
 691                            atomic_read(&obd->obd_max_recoverable_clients));
 692                 seq_printf(m, "replayed_requests: %d\n",
 693                            obd->obd_replayed_requests);
 694                 seq_printf(m, "last_transno: %lld\n",
 695                            obd->obd_next_recovery_transno - 1);
 696                 seq_printf(m, "VBR: %s\n", obd->obd_version_recov ?
 697                            "ENABLED" : "DISABLED");
 698                 seq_printf(m, "IR: %s\n", obd->obd_no_ir ?
 699                            "DISABLED" : "ENABLED");
 700                 goto out;
 701         }
 702
 703         tdtd = obd->u.obt.obt_lut->lut_tdtd;
 704         if (tdtd && tdtd->tdtd_show_update_logs_retrievers) {
 705                 char *buf;
 706                 int size = 0;
 707                 int count = 0;
 708
 709                 buf = tdtd->tdtd_show_update_logs_retrievers(
 710                         tdtd->tdtd_show_retrievers_cbdata,
 711                         &size, &count);
 712                 if (count > 0) {
 713                         seq_printf(m, "WAITING\n");
 714                         seq_printf(m, "non-ready MDTs: %s\n",
 715                                    buf ? buf : "unknown (not enough RAM)");
 716                         seq_printf(m, "recovery_start: %lld\n",
 717                                    (s64)obd->obd_recovery_start);
 718                         seq_printf(m, "time_waited: %lld\n",
 719                                    (s64)(ktime_get_real_seconds() -
 720                                          obd->obd_recovery_start));
 721                 }
 722
 723                 if (buf != NULL)
 724                         OBD_FREE(buf, size);
 725
 726                 if (likely(count > 0))
 727                         goto out;
 728         }
 729
 730         /* recovery won't start until the clients connect */
 731         if (obd->obd_recovery_start == 0) {
 732                 seq_printf(m, "WAITING_FOR_CLIENTS\n");
 733                 goto out;
 734         }
 735
 736         seq_printf(m, "RECOVERING\n");
 737         seq_printf(m, "recovery_start: %lld\n", (s64)obd->obd_recovery_start);
 738         seq_printf(m, "time_remaining: %lld\n",
 739                    ktime_get_real_seconds() >=
 740                    obd->obd_recovery_start +
 741                    obd->obd_recovery_timeout ? 0 :
 742                    (s64)(obd->obd_recovery_start +
 743                          obd->obd_recovery_timeout -
 744                          ktime_get_real_seconds()));
 745         seq_printf(m, "connected_clients: %d/%d\n",
 746                    atomic_read(&obd->obd_connected_clients),
 747                    atomic_read(&obd->obd_max_recoverable_clients));
 748         /* Number of clients that have completed recovery */
 749         seq_printf(m, "req_replay_clients: %d\n",
 750                    atomic_read(&obd->obd_req_replay_clients));
 751         seq_printf(m, "lock_repay_clients: %d\n",
 752                    atomic_read(&obd->obd_lock_replay_clients));
 753         seq_printf(m, "completed_clients: %d\n",
 754                    atomic_read(&obd->obd_connected_clients) -
 755                    atomic_read(&obd->obd_lock_replay_clients));
 756         seq_printf(m, "evicted_clients: %d\n", obd->obd_stale_clients);
 757         seq_printf(m, "replayed_requests: %d\n", obd->obd_replayed_requests);
 758         seq_printf(m, "queued_requests: %d\n",
 759                    obd->obd_requests_queued_for_recovery);
 760         seq_printf(m, "next_transno: %lld\n",
 761                    obd->obd_next_recovery_transno);
 762 out:
 763         return 0;
 764 }
 765 EXPORT_SYMBOL(lprocfs_recovery_status_seq_show);
 766
 767 ssize_t ir_factor_show(struct kobject *kobj, struct attribute *attr,
 768                        char *buf)
 769 {
 770         struct obd_device *obd = container_of(kobj, struct obd_device,
 771                                               obd_kset.kobj);
 772
 773         return scnprintf(buf, PAGE_SIZE, "%d\n", obd->obd_recovery_ir_factor);
 774 }
 775 EXPORT_SYMBOL(ir_factor_show);
 776
 777 ssize_t ir_factor_store(struct kobject *kobj, struct attribute *attr,
 778                         const char *buffer, size_t count)
 779 {
 780         struct obd_device *obd = container_of(kobj, struct obd_device,
 781                                               obd_kset.kobj);
 782         int val;
 783         int rc;
 784
 785         rc = kstrtoint(buffer, 10, &val);
 786         if (rc)
 787                 return rc;
 788
 789         if (val < OBD_IR_FACTOR_MIN || val > OBD_IR_FACTOR_MAX)
 790                 return -EINVAL;
 791
 792         obd->obd_recovery_ir_factor = val;
 793         return count;
 794 }
 795 EXPORT_SYMBOL(ir_factor_store);
 796
 797 int lprocfs_checksum_dump_seq_show(struct seq_file *m, void *data)
 798 {
 799         struct obd_device *obd = m->private;
 800
 801         LASSERT(obd != NULL);
 802         seq_printf(m, "%d\n", obd->obd_checksum_dump);
 803         return 0;
 804 }
 805 EXPORT_SYMBOL(lprocfs_checksum_dump_seq_show);
 806
 807 ssize_t
 808 lprocfs_checksum_dump_seq_write(struct file *file, 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         bool val;
 814         int rc;
 815
 816         LASSERT(obd != NULL);
 817         rc = kstrtobool_from_user(buffer, count, &val);
 818         if (rc)
 819                 return rc;
 820
 821         obd->obd_checksum_dump = val;
 822         return count;
 823 }
 824 EXPORT_SYMBOL(lprocfs_checksum_dump_seq_write);
 825
 826 ssize_t recovery_time_soft_show(struct kobject *kobj, struct attribute *attr,
 827                                 char *buf)
 828 {
 829         struct obd_device *obd = container_of(kobj, struct obd_device,
 830                                               obd_kset.kobj);
 831
 832         return scnprintf(buf, PAGE_SIZE, "%ld\n", obd->obd_recovery_timeout);
 833 }
 834 EXPORT_SYMBOL(recovery_time_soft_show);
 835
 836 ssize_t recovery_time_soft_store(struct kobject *kobj,
 837                                  struct attribute *attr,
 838                                  const char *buffer, size_t count)
 839 {
 840         struct obd_device *obd = container_of(kobj, struct obd_device,
 841                                               obd_kset.kobj);
 842         unsigned int val;
 843         int rc;
 844
 845         rc = kstrtouint(buffer, 0, &val);
 846         if (rc)
 847                 return rc;
 848
 849         obd->obd_recovery_timeout = val;
 850         return count;
 851 }
 852 EXPORT_SYMBOL(recovery_time_soft_store);
 853
 854 ssize_t recovery_time_hard_show(struct kobject *kobj, struct attribute *attr,
 855                                 char *buf)
 856 {
 857         struct obd_device *obd = container_of(kobj, struct obd_device,
 858                                               obd_kset.kobj);
 859
 860         return scnprintf(buf, PAGE_SIZE, "%ld\n", obd->obd_recovery_time_hard);
 861 }
 862 EXPORT_SYMBOL(recovery_time_hard_show);
 863
 864 ssize_t recovery_time_hard_store(struct kobject *kobj,
 865                                  struct attribute *attr,
 866                                  const char *buffer, size_t count)
 867 {
 868         struct obd_device *obd = container_of(kobj, struct obd_device,
 869                                               obd_kset.kobj);
 870         unsigned int val;
 871         int rc;
 872
 873         rc = kstrtouint(buffer, 0, &val);
 874         if (rc)
 875                 return rc;
 876
 877         obd->obd_recovery_time_hard = val;
 878         return count;
 879 }
 880 EXPORT_SYMBOL(recovery_time_hard_store);
 881
 882 ssize_t instance_show(struct kobject *kobj, struct attribute *attr,
 883                       char *buf)
 884 {
 885         struct obd_device *obd = container_of(kobj, struct obd_device,
 886                                               obd_kset.kobj);
 887         struct obd_device_target *target = &obd->u.obt;
 888
 889         LASSERT(target->obt_magic == OBT_MAGIC);
 890         return scnprintf(buf, PAGE_SIZE, "%u\n", obd->u.obt.obt_instance);
 891 }
 892 EXPORT_SYMBOL(instance_show);
 893
 894 #endif /* CONFIG_PROC_FS*/