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