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         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_exp_print_fmd_count_seq(struct cfs_hash *hs, struct cfs_hash_bd *bd,
 388                                     struct hlist_node *hnode, void *cb_data)
 389
 390 {
 391         struct obd_export *exp = cfs_hash_object(hs, hnode);
 392         struct seq_file *m = cb_data;
 393         struct tg_export_data *ted = &exp->exp_target_data;
 394
 395         seq_printf(m, "%d\n", ted->ted_fmd_count);
 396
 397         return 0;
 398 }
 399
 400 int lprocfs_exp_fmd_count_seq_show(struct seq_file *m, void *data)
 401 {
 402         struct nid_stat *stats = m->private;
 403         struct obd_device *obd = stats->nid_obd;
 404
 405         cfs_hash_for_each_key(obd->obd_nid_hash, &stats->nid,
 406                               lprocfs_exp_print_fmd_count_seq, m);
 407         return 0;
 408 }
 409 LPROC_SEQ_FOPS_RO(lprocfs_exp_fmd_count);
 410
 411 int lprocfs_nid_stats_clear_seq_show(struct seq_file *m, void *data)
 412 {
 413         seq_puts(m, "Write into this file to clear all nid stats and stale nid entries\n");
 414         return 0;
 415 }
 416 EXPORT_SYMBOL(lprocfs_nid_stats_clear_seq_show);
 417
 418 static int lprocfs_nid_stats_clear_write_cb(void *obj, void *data)
 419 {
 420         struct nid_stat *stat = obj;
 421         ENTRY;
 422
 423         CDEBUG(D_INFO, "refcnt %d\n", atomic_read(&stat->nid_exp_ref_count));
 424         if (atomic_read(&stat->nid_exp_ref_count) == 1) {
 425                 /* object has only hash references. */
 426                 spin_lock(&stat->nid_obd->obd_nid_lock);
 427                 list_move(&stat->nid_list, data);
 428                 spin_unlock(&stat->nid_obd->obd_nid_lock);
 429                 RETURN(1);
 430         }
 431         /* we has reference to object - only clear data*/
 432         if (stat->nid_stats)
 433                 lprocfs_clear_stats(stat->nid_stats);
 434
 435         RETURN(0);
 436 }
 437
 438 ssize_t
 439 lprocfs_nid_stats_clear_seq_write(struct file *file, const char __user *buffer,
 440                                         size_t count, loff_t *off)
 441 {
 442         struct seq_file *m = file->private_data;
 443         struct obd_device *obd = m->private;
 444         struct nid_stat *client_stat;
 445         struct list_head free_list;
 446
 447         INIT_LIST_HEAD(&free_list);
 448         cfs_hash_cond_del(obd->obd_nid_stats_hash,
 449                           lprocfs_nid_stats_clear_write_cb, &free_list);
 450
 451         while (!list_empty(&free_list)) {
 452                 client_stat = list_entry(free_list.next, struct nid_stat,
 453                                          nid_list);
 454                 list_del_init(&client_stat->nid_list);
 455                 lprocfs_free_client_stats(client_stat);
 456         }
 457         return count;
 458 }
 459 EXPORT_SYMBOL(lprocfs_nid_stats_clear_seq_write);
 460
 461 int lprocfs_exp_setup(struct obd_export *exp, lnet_nid_t *nid)
 462 {
 463         struct nid_stat *new_stat, *old_stat;
 464         struct obd_device *obd = NULL;
 465         struct proc_dir_entry *entry;
 466         char nidstr[LNET_NIDSTR_SIZE];
 467         int rc = 0;
 468         ENTRY;
 469
 470         if (!exp || !exp->exp_obd || !exp->exp_obd->obd_proc_exports_entry ||
 471             !exp->exp_obd->obd_nid_stats_hash)
 472                 RETURN(-EINVAL);
 473
 474         /* not test against zero because eric say:
 475          * You may only test nid against another nid, or LNET_NID_ANY.
 476          * Anything else is nonsense.*/
 477         if (nid == NULL || *nid == LNET_NID_ANY)
 478                 RETURN(-EALREADY);
 479
 480         libcfs_nid2str_r(*nid, nidstr, sizeof(nidstr));
 481
 482         spin_lock(&exp->exp_lock);
 483         if (exp->exp_nid_stats != NULL) {
 484                 spin_unlock(&exp->exp_lock);
 485                 RETURN(-EALREADY);
 486         }
 487         spin_unlock(&exp->exp_lock);
 488
 489         obd = exp->exp_obd;
 490
 491         CDEBUG(D_CONFIG, "using hash %p\n", obd->obd_nid_stats_hash);
 492
 493         OBD_ALLOC_PTR(new_stat);
 494         if (new_stat == NULL)
 495                 RETURN(-ENOMEM);
 496
 497         new_stat->nid     = *nid;
 498         new_stat->nid_obd = exp->exp_obd;
 499         /* we need set default refcount to 1 to balance obd_disconnect */
 500         atomic_set(&new_stat->nid_exp_ref_count, 1);
 501
 502         old_stat = cfs_hash_findadd_unique(obd->obd_nid_stats_hash,
 503                                            nid, &new_stat->nid_hash);
 504         CDEBUG(D_INFO, "Found stats %p for nid %s - ref %d\n",
 505                old_stat, nidstr, atomic_read(&old_stat->nid_exp_ref_count));
 506
 507         /* Return -EALREADY here so that we know that the /proc
 508          * entry already has been created */
 509         if (old_stat != new_stat) {
 510                 spin_lock(&exp->exp_lock);
 511                 if (exp->exp_nid_stats) {
 512                         LASSERT(exp->exp_nid_stats == old_stat);
 513                         nidstat_putref(exp->exp_nid_stats);
 514                 }
 515                 exp->exp_nid_stats = old_stat;
 516                 spin_unlock(&exp->exp_lock);
 517                 GOTO(destroy_new, rc = -EALREADY);
 518         }
 519         /* not found - create */
 520         new_stat->nid_proc = lprocfs_register(nidstr,
 521                                               obd->obd_proc_exports_entry,
 522                                               NULL, NULL);
 523
 524         if (IS_ERR(new_stat->nid_proc)) {
 525                 rc = PTR_ERR(new_stat->nid_proc);
 526                 new_stat->nid_proc = NULL;
 527                 CERROR("%s: cannot create proc entry for export %s: rc = %d\n",
 528                        obd->obd_name, nidstr, rc);
 529                 GOTO(destroy_new_ns, rc);
 530         }
 531
 532         entry = lprocfs_add_simple(new_stat->nid_proc, "nodemap", new_stat,
 533                                    &lprocfs_exp_nodemap_fops);
 534         if (IS_ERR(entry)) {
 535                 rc = PTR_ERR(entry);
 536                 CWARN("%s: error adding the nodemap file: rc = %d\n",
 537                       obd->obd_name, rc);
 538                 GOTO(destroy_new_ns, rc);
 539         }
 540
 541         entry = lprocfs_add_simple(new_stat->nid_proc, "uuid", new_stat,
 542                                    &lprocfs_exp_uuid_fops);
 543         if (IS_ERR(entry)) {
 544                 rc = PTR_ERR(entry);
 545                 CWARN("%s: error adding the NID stats file: rc = %d\n",
 546                       obd->obd_name, rc);
 547                 GOTO(destroy_new_ns, rc);
 548         }
 549
 550         entry = lprocfs_add_simple(new_stat->nid_proc, "hash", new_stat,
 551                                    &lprocfs_exp_hash_fops);
 552         if (IS_ERR(entry)) {
 553                 rc = PTR_ERR(entry);
 554                 CWARN("%s: error adding the hash file: rc = %d\n",
 555                       obd->obd_name, rc);
 556                 GOTO(destroy_new_ns, rc);
 557         }
 558
 559         entry = lprocfs_add_simple(new_stat->nid_proc, "export",
 560                                    new_stat, &lprocfs_exp_export_fops);
 561         if (IS_ERR(entry)) {
 562                 rc = PTR_ERR(entry);
 563                 CWARN("%s: error adding the export file: rc = %d\n",
 564                       obd->obd_name, rc);
 565                 GOTO(destroy_new_ns, rc);
 566         }
 567
 568         entry = lprocfs_add_simple(new_stat->nid_proc, "reply_data", new_stat,
 569                                    &lprocfs_exp_replydata_fops);
 570         if (IS_ERR(entry)) {
 571                 rc = PTR_ERR(entry);
 572                 CWARN("%s: error adding the reply_data 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, "fmd_count", new_stat,
 578                                    &lprocfs_exp_fmd_count_fops);
 579         if (IS_ERR(entry)) {
 580                 rc = PTR_ERR(entry);
 581                 CWARN("%s: error adding the fmd_count file: rc = %d\n",
 582                       obd->obd_name, rc);
 583                 GOTO(destroy_new_ns, rc);
 584         }
 585
 586         spin_lock(&exp->exp_lock);
 587         exp->exp_nid_stats = new_stat;
 588         spin_unlock(&exp->exp_lock);
 589
 590         /* protect competitive add to list, not need locking on destroy */
 591         spin_lock(&obd->obd_nid_lock);
 592         list_add(&new_stat->nid_list, &obd->obd_nid_stats);
 593         spin_unlock(&obd->obd_nid_lock);
 594
 595         RETURN(0);
 596
 597 destroy_new_ns:
 598         if (new_stat->nid_proc != NULL)
 599                 lprocfs_remove(&new_stat->nid_proc);
 600         cfs_hash_del(obd->obd_nid_stats_hash, nid, &new_stat->nid_hash);
 601
 602 destroy_new:
 603         nidstat_putref(new_stat);
 604         OBD_FREE_PTR(new_stat);
 605         RETURN(rc);
 606 }
 607 EXPORT_SYMBOL(lprocfs_exp_setup);
 608
 609 int lprocfs_exp_cleanup(struct obd_export *exp)
 610 {
 611         struct nid_stat *stat = exp->exp_nid_stats;
 612
 613         if (!stat || !exp->exp_obd)
 614                 RETURN(0);
 615
 616         nidstat_putref(exp->exp_nid_stats);
 617         exp->exp_nid_stats = NULL;
 618
 619         return 0;
 620 }
 621
 622 int lprocfs_alloc_obd_stats(struct obd_device *obd, unsigned int num_stats)
 623 {
 624         struct lprocfs_stats *stats;
 625         int rc;
 626
 627         LASSERT(obd->obd_stats == NULL);
 628         LASSERT(obd->obd_proc_entry != NULL);
 629
 630         stats = lprocfs_alloc_stats(num_stats, 0);
 631         if (stats == NULL)
 632                 return -ENOMEM;
 633
 634         rc = lprocfs_register_stats(obd->obd_proc_entry, "stats", stats);
 635         if (rc < 0)
 636                 lprocfs_free_stats(&stats);
 637         else
 638                 obd->obd_stats = stats;
 639
 640         return rc;
 641 }
 642 EXPORT_SYMBOL(lprocfs_alloc_obd_stats);
 643
 644 void lprocfs_free_obd_stats(struct obd_device *obd)
 645 {
 646         if (obd->obd_stats)
 647                 lprocfs_free_stats(&obd->obd_stats);
 648 }
 649 EXPORT_SYMBOL(lprocfs_free_obd_stats);
 650
 651 int lprocfs_hash_seq_show(struct seq_file *m, void *data)
 652 {
 653         struct obd_device *obd = m->private;
 654
 655         if (obd == NULL)
 656                 return 0;
 657
 658         cfs_hash_debug_header(m);
 659         cfs_hash_debug_str(obd->obd_uuid_hash, m);
 660         cfs_hash_debug_str(obd->obd_nid_hash, m);
 661         cfs_hash_debug_str(obd->obd_nid_stats_hash, m);
 662         return 0;
 663 }
 664 EXPORT_SYMBOL(lprocfs_hash_seq_show);
 665
 666 int lprocfs_recovery_status_seq_show(struct seq_file *m, void *data)
 667 {
 668         struct obd_device *obd = m->private;
 669         struct target_distribute_txn_data *tdtd;
 670
 671         LASSERT(obd != NULL);
 672
 673         seq_printf(m, "status: ");
 674         if (obd->obd_max_recoverable_clients == 0) {
 675                 seq_printf(m, "INACTIVE\n");
 676                 goto out;
 677         }
 678
 679         /* sampled unlocked, but really... */
 680         if (obd->obd_recovering == 0) {
 681                 seq_printf(m, "COMPLETE\n");
 682                 seq_printf(m, "recovery_start: %lld\n",
 683                            (s64)obd->obd_recovery_start);
 684                 seq_printf(m, "recovery_duration: %lld\n",
 685                            obd->obd_recovery_end ?
 686                            obd->obd_recovery_end - obd->obd_recovery_start :
 687                            ktime_get_real_seconds() - obd->obd_recovery_start);
 688                 /* Number of clients that have completed recovery */
 689                 seq_printf(m, "completed_clients: %d/%d\n",
 690                            obd->obd_max_recoverable_clients -
 691                            obd->obd_stale_clients,
 692                            obd->obd_max_recoverable_clients);
 693                 seq_printf(m, "replayed_requests: %d\n",
 694                            obd->obd_replayed_requests);
 695                 seq_printf(m, "last_transno: %lld\n",
 696                            obd->obd_next_recovery_transno - 1);
 697                 seq_printf(m, "VBR: %s\n", obd->obd_version_recov ?
 698                            "ENABLED" : "DISABLED");
 699                 seq_printf(m, "IR: %s\n", obd->obd_no_ir ?
 700                            "DISABLED" : "ENABLED");
 701                 goto out;
 702         }
 703
 704         tdtd = obd->u.obt.obt_lut->lut_tdtd;
 705         if (tdtd && tdtd->tdtd_show_update_logs_retrievers) {
 706                 char *buf;
 707                 int size = 0;
 708                 int count = 0;
 709
 710                 buf = tdtd->tdtd_show_update_logs_retrievers(
 711                         tdtd->tdtd_show_retrievers_cbdata,
 712                         &size, &count);
 713                 if (count > 0) {
 714                         seq_printf(m, "WAITING\n");
 715                         seq_printf(m, "non-ready MDTs: %s\n",
 716                                    buf ? buf : "unknown (not enough RAM)");
 717                         seq_printf(m, "recovery_start: %lld\n",
 718                                    (s64)obd->obd_recovery_start);
 719                         seq_printf(m, "time_waited: %lld\n",
 720                                    (s64)(ktime_get_real_seconds() -
 721                                          obd->obd_recovery_start));
 722                 }
 723
 724                 if (buf != NULL)
 725                         OBD_FREE(buf, size);
 726
 727                 if (likely(count > 0))
 728                         goto out;
 729         }
 730
 731         /* recovery won't start until the clients connect */
 732         if (obd->obd_recovery_start == 0) {
 733                 seq_printf(m, "WAITING_FOR_CLIENTS\n");
 734                 goto out;
 735         }
 736
 737         seq_printf(m, "RECOVERING\n");
 738         seq_printf(m, "recovery_start: %lld\n", (s64)obd->obd_recovery_start);
 739         seq_printf(m, "time_remaining: %lld\n",
 740                    ktime_get_real_seconds() >=
 741                    obd->obd_recovery_start +
 742                    obd->obd_recovery_timeout ? 0 :
 743                    (s64)(obd->obd_recovery_start +
 744                          obd->obd_recovery_timeout -
 745                          ktime_get_real_seconds()));
 746         seq_printf(m, "connected_clients: %d/%d\n",
 747                    atomic_read(&obd->obd_connected_clients),
 748                    obd->obd_max_recoverable_clients);
 749         /* Number of clients that have completed recovery */
 750         seq_printf(m, "req_replay_clients: %d\n",
 751                    atomic_read(&obd->obd_req_replay_clients));
 752         seq_printf(m, "lock_repay_clients: %d\n",
 753                    atomic_read(&obd->obd_lock_replay_clients));
 754         seq_printf(m, "completed_clients: %d\n",
 755                    atomic_read(&obd->obd_connected_clients) -
 756                    atomic_read(&obd->obd_lock_replay_clients));
 757         seq_printf(m, "evicted_clients: %d\n", obd->obd_stale_clients);
 758         seq_printf(m, "replayed_requests: %d\n", obd->obd_replayed_requests);
 759         seq_printf(m, "queued_requests: %d\n",
 760                    obd->obd_requests_queued_for_recovery);
 761         seq_printf(m, "next_transno: %lld\n",
 762                    obd->obd_next_recovery_transno);
 763 out:
 764         return 0;
 765 }
 766 EXPORT_SYMBOL(lprocfs_recovery_status_seq_show);
 767
 768 ssize_t ir_factor_show(struct kobject *kobj, struct attribute *attr,
 769                        char *buf)
 770 {
 771         struct obd_device *obd = container_of(kobj, struct obd_device,
 772                                               obd_kset.kobj);
 773
 774         return scnprintf(buf, PAGE_SIZE, "%d\n", obd->obd_recovery_ir_factor);
 775 }
 776 EXPORT_SYMBOL(ir_factor_show);
 777
 778 ssize_t ir_factor_store(struct kobject *kobj, struct attribute *attr,
 779                         const char *buffer, size_t count)
 780 {
 781         struct obd_device *obd = container_of(kobj, struct obd_device,
 782                                               obd_kset.kobj);
 783         int val;
 784         int rc;
 785
 786         rc = kstrtoint(buffer, 10, &val);
 787         if (rc)
 788                 return rc;
 789
 790         if (val < OBD_IR_FACTOR_MIN || val > OBD_IR_FACTOR_MAX)
 791                 return -EINVAL;
 792
 793         obd->obd_recovery_ir_factor = val;
 794         return count;
 795 }
 796 EXPORT_SYMBOL(ir_factor_store);
 797
 798 int lprocfs_checksum_dump_seq_show(struct seq_file *m, void *data)
 799 {
 800         struct obd_device *obd = m->private;
 801
 802         LASSERT(obd != NULL);
 803         seq_printf(m, "%d\n", obd->obd_checksum_dump);
 804         return 0;
 805 }
 806 EXPORT_SYMBOL(lprocfs_checksum_dump_seq_show);
 807
 808 ssize_t
 809 lprocfs_checksum_dump_seq_write(struct file *file, const char __user *buffer,
 810                             size_t count, loff_t *off)
 811 {
 812         struct seq_file *m = file->private_data;
 813         struct obd_device *obd = m->private;
 814         bool val;
 815         int rc;
 816
 817         LASSERT(obd != NULL);
 818         rc = kstrtobool_from_user(buffer, count, &val);
 819         if (rc)
 820                 return rc;
 821
 822         obd->obd_checksum_dump = val;
 823         return count;
 824 }
 825 EXPORT_SYMBOL(lprocfs_checksum_dump_seq_write);
 826
 827 ssize_t recovery_time_soft_show(struct kobject *kobj, struct attribute *attr,
 828                                 char *buf)
 829 {
 830         struct obd_device *obd = container_of(kobj, struct obd_device,
 831                                               obd_kset.kobj);
 832
 833         return scnprintf(buf, PAGE_SIZE, "%ld\n", obd->obd_recovery_timeout);
 834 }
 835 EXPORT_SYMBOL(recovery_time_soft_show);
 836
 837 ssize_t recovery_time_soft_store(struct kobject *kobj,
 838                                  struct attribute *attr,
 839                                  const char *buffer, size_t count)
 840 {
 841         struct obd_device *obd = container_of(kobj, struct obd_device,
 842                                               obd_kset.kobj);
 843         unsigned int val;
 844         int rc;
 845
 846         rc = kstrtouint(buffer, 0, &val);
 847         if (rc)
 848                 return rc;
 849
 850         obd->obd_recovery_timeout = val;
 851         return count;
 852 }
 853 EXPORT_SYMBOL(recovery_time_soft_store);
 854
 855 ssize_t recovery_time_hard_show(struct kobject *kobj, struct attribute *attr,
 856                                 char *buf)
 857 {
 858         struct obd_device *obd = container_of(kobj, struct obd_device,
 859                                               obd_kset.kobj);
 860
 861         return scnprintf(buf, PAGE_SIZE, "%ld\n", obd->obd_recovery_time_hard);
 862 }
 863 EXPORT_SYMBOL(recovery_time_hard_show);
 864
 865 ssize_t recovery_time_hard_store(struct kobject *kobj,
 866                                  struct attribute *attr,
 867                                  const char *buffer, size_t count)
 868 {
 869         struct obd_device *obd = container_of(kobj, struct obd_device,
 870                                               obd_kset.kobj);
 871         unsigned int val;
 872         int rc;
 873
 874         rc = kstrtouint(buffer, 0, &val);
 875         if (rc)
 876                 return rc;
 877
 878         obd->obd_recovery_time_hard = val;
 879         return count;
 880 }
 881 EXPORT_SYMBOL(recovery_time_hard_store);
 882
 883 ssize_t instance_show(struct kobject *kobj, struct attribute *attr,
 884                       char *buf)
 885 {
 886         struct obd_device *obd = container_of(kobj, struct obd_device,
 887                                               obd_kset.kobj);
 888         struct obd_device_target *target = &obd->u.obt;
 889
 890         LASSERT(target->obt_magic == OBT_MAGIC);
 891         return scnprintf(buf, PAGE_SIZE, "%u\n", obd->u.obt.obt_instance);
 892 }
 893 EXPORT_SYMBOL(instance_show);
 894
 895 #endif /* CONFIG_PROC_FS*/