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