lustre/mdc/lproc_mdc.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) 2011, 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 #define DEBUG_SUBSYSTEM S_CLASS
  33
  34 #include <linux/vfs.h>
  35 #include <obd_class.h>
  36 #include <obd_cksum.h>
  37 #include <lprocfs_status.h>
  38 #include <lustre_osc.h>
  39 #include <cl_object.h>
  40 #include "mdc_internal.h"
  41
  42 static ssize_t active_show(struct kobject *kobj, struct attribute *attr,
  43                            char *buf)
  44 {
  45         struct obd_device *obd = container_of(kobj, struct obd_device,
  46                                               obd_kset.kobj);
  47         struct obd_import *imp;
  48         ssize_t len;
  49
  50         with_imp_locked(obd, imp, len)
  51                 len = sprintf(buf, "%d\n", !imp->imp_deactive);
  52         return len;
  53 }
  54
  55 static ssize_t active_store(struct kobject *kobj, struct attribute *attr,
  56                             const char *buffer, size_t count)
  57 {
  58         struct obd_device *obd = container_of(kobj, struct obd_device,
  59                                               obd_kset.kobj);
  60         struct obd_import *imp, *imp0;
  61         bool val;
  62         int rc;
  63
  64         rc = kstrtobool(buffer, &val);
  65         if (rc)
  66                 return rc;
  67
  68         with_imp_locked(obd, imp0, rc)
  69                 imp = class_import_get(imp0);
  70         if (rc)
  71                 return rc;
  72         /* opposite senses */
  73         if (imp->imp_deactive == val)
  74                 rc = ptlrpc_set_import_active(imp, val);
  75         else
  76                 CDEBUG(D_CONFIG, "activate %u: ignoring repeat request\n",
  77                        val);
  78         class_import_put(imp);
  79         return rc ?: count;
  80 }
  81 LUSTRE_RW_ATTR(active);
  82
  83 static ssize_t max_rpcs_in_flight_show(struct kobject *kobj,
  84                                        struct attribute *attr,
  85                                        char *buf)
  86 {
  87         struct obd_device *obd = container_of(kobj, struct obd_device,
  88                                               obd_kset.kobj);
  89         ssize_t len;
  90         u32 max;
  91
  92         max = obd_get_max_rpcs_in_flight(&obd->u.cli);
  93         len = sprintf(buf, "%u\n", max);
  94
  95         return len;
  96 }
  97
  98 static ssize_t max_rpcs_in_flight_store(struct kobject *kobj,
  99                                         struct attribute *attr,
 100                                         const char *buffer,
 101                                         size_t count)
 102 {
 103         struct obd_device *obd = container_of(kobj, struct obd_device,
 104                                               obd_kset.kobj);
 105         unsigned int val;
 106         int rc;
 107
 108         rc = kstrtouint(buffer, 10, &val);
 109         if (rc)
 110                 return rc;
 111
 112         rc = obd_set_max_rpcs_in_flight(&obd->u.cli, val);
 113         if (rc)
 114                 count = rc;
 115
 116         return count;
 117 }
 118 LUSTRE_RW_ATTR(max_rpcs_in_flight);
 119
 120 static ssize_t max_mod_rpcs_in_flight_show(struct kobject *kobj,
 121                                            struct attribute *attr,
 122                                            char *buf)
 123 {
 124         struct obd_device *obd = container_of(kobj, struct obd_device,
 125                                               obd_kset.kobj);
 126         u16 max;
 127
 128         max = obd_get_max_mod_rpcs_in_flight(&obd->u.cli);
 129         return sprintf(buf, "%hu\n", max);
 130 }
 131
 132 static ssize_t max_mod_rpcs_in_flight_store(struct kobject *kobj,
 133                                             struct attribute *attr,
 134                                             const char *buffer,
 135                                             size_t count)
 136 {
 137         struct obd_device *obd = container_of(kobj, struct obd_device,
 138                                               obd_kset.kobj);
 139         u16 val;
 140         int rc;
 141
 142         rc = kstrtou16(buffer, 10, &val);
 143         if (rc)
 144                 return rc;
 145
 146         rc = obd_set_max_mod_rpcs_in_flight(&obd->u.cli, val);
 147         if (rc)
 148                 count = rc;
 149
 150         return count;
 151 }
 152 LUSTRE_RW_ATTR(max_mod_rpcs_in_flight);
 153
 154 static int mdc_max_dirty_mb_seq_show(struct seq_file *m, void *v)
 155 {
 156         struct obd_device *obd = m->private;
 157         struct client_obd *cli = &obd->u.cli;
 158
 159         seq_printf(m, "%lu\n", PAGES_TO_MiB(cli->cl_dirty_max_pages));
 160         return 0;
 161 }
 162
 163 static ssize_t mdc_max_dirty_mb_seq_write(struct file *file,
 164                                           const char __user *buffer,
 165                                           size_t count, loff_t *off)
 166 {
 167         struct seq_file *sfl = file->private_data;
 168         struct obd_device *obd = sfl->private;
 169         struct client_obd *cli = &obd->u.cli;
 170         char kernbuf[22] = "";
 171         u64 pages_number;
 172         int rc;
 173
 174         if (count >= sizeof(kernbuf))
 175                 return -EINVAL;
 176
 177         if (copy_from_user(kernbuf, buffer, count))
 178                 return -EFAULT;
 179         kernbuf[count] = 0;
 180
 181         rc = sysfs_memparse(kernbuf, count, &pages_number, "MiB");
 182         if (rc < 0)
 183                 return rc;
 184
 185         /* MB -> pages */
 186         pages_number = round_up(pages_number, 1024 * 1024) >> PAGE_SHIFT;
 187         if (pages_number <= 0 ||
 188             pages_number >= MiB_TO_PAGES(OSC_MAX_DIRTY_MB_MAX) ||
 189             pages_number > cfs_totalram_pages() / 4) /* 1/4 of RAM */
 190                 return -ERANGE;
 191
 192         spin_lock(&cli->cl_loi_list_lock);
 193         cli->cl_dirty_max_pages = pages_number;
 194         osc_wake_cache_waiters(cli);
 195         spin_unlock(&cli->cl_loi_list_lock);
 196
 197         return count;
 198 }
 199 LPROC_SEQ_FOPS(mdc_max_dirty_mb);
 200
 201 DECLARE_CKSUM_NAME;
 202
 203 static int mdc_checksum_type_seq_show(struct seq_file *m, void *v)
 204 {
 205         struct obd_device *obd = m->private;
 206         int i;
 207
 208         if (obd == NULL)
 209                 return 0;
 210
 211         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 212                 if ((BIT(i) & obd->u.cli.cl_supp_cksum_types) == 0)
 213                         continue;
 214                 if (obd->u.cli.cl_cksum_type == BIT(i))
 215                         seq_printf(m, "[%s] ", cksum_name[i]);
 216                 else
 217                         seq_printf(m, "%s ", cksum_name[i]);
 218         }
 219         seq_puts(m, "\n");
 220
 221         return 0;
 222 }
 223
 224 static ssize_t mdc_checksum_type_seq_write(struct file *file,
 225                                            const char __user *buffer,
 226                                            size_t count, loff_t *off)
 227 {
 228         struct seq_file *m = file->private_data;
 229         struct obd_device *obd = m->private;
 230         char kernbuf[10];
 231         int rc = -EINVAL;
 232         int i;
 233
 234         if (obd == NULL)
 235                 return 0;
 236
 237         if (count > sizeof(kernbuf) - 1)
 238                 return -EINVAL;
 239         if (copy_from_user(kernbuf, buffer, count))
 240                 return -EFAULT;
 241
 242         if (count > 0 && kernbuf[count - 1] == '\n')
 243                 kernbuf[count - 1] = '\0';
 244         else
 245                 kernbuf[count] = '\0';
 246
 247         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 248                 if (strcmp(kernbuf, cksum_name[i]) == 0) {
 249                         obd->u.cli.cl_preferred_cksum_type = BIT(i);
 250                         if (obd->u.cli.cl_supp_cksum_types & BIT(i)) {
 251                                 obd->u.cli.cl_cksum_type = BIT(i);
 252                                 rc = count;
 253                         } else {
 254                                 rc = -ENOTSUPP;
 255                         }
 256                         break;
 257                 }
 258         }
 259
 260         return rc;
 261 }
 262 LPROC_SEQ_FOPS(mdc_checksum_type);
 263
 264 static ssize_t checksums_show(struct kobject *kobj,
 265                               struct attribute *attr, char *buf)
 266 {
 267         struct obd_device *obd = container_of(kobj, struct obd_device,
 268                                               obd_kset.kobj);
 269
 270         return scnprintf(buf, PAGE_SIZE, "%d\n", !!obd->u.cli.cl_checksum);
 271 }
 272
 273 static ssize_t checksums_store(struct kobject *kobj,
 274                                struct attribute *attr,
 275                                const char *buffer,
 276                                size_t count)
 277 {
 278         struct obd_device *obd = container_of(kobj, struct obd_device,
 279                                               obd_kset.kobj);
 280         bool val;
 281         int rc;
 282
 283         rc = kstrtobool(buffer, &val);
 284         if (rc)
 285                 return rc;
 286
 287         obd->u.cli.cl_checksum = val;
 288
 289         return count;
 290 }
 291 LUSTRE_RW_ATTR(checksums);
 292
 293 static ssize_t checksum_dump_show(struct kobject *kobj,
 294                                   struct attribute *attr, char *buf)
 295 {
 296         struct obd_device *obd = container_of(kobj, struct obd_device,
 297                                               obd_kset.kobj);
 298
 299         return scnprintf(buf, PAGE_SIZE, "%d\n", !!obd->u.cli.cl_checksum_dump);
 300 }
 301
 302 static ssize_t checksum_dump_store(struct kobject *kobj,
 303                                    struct attribute *attr,
 304                                    const char *buffer,
 305                                    size_t count)
 306 {
 307         struct obd_device *obd = container_of(kobj, struct obd_device,
 308                                               obd_kset.kobj);
 309         bool val;
 310         int rc;
 311
 312         rc = kstrtobool(buffer, &val);
 313         if (rc)
 314                 return rc;
 315
 316         obd->u.cli.cl_checksum_dump = val;
 317
 318         return count;
 319 }
 320 LUSTRE_RW_ATTR(checksum_dump);
 321
 322 static ssize_t contention_seconds_show(struct kobject *kobj,
 323                                        struct attribute *attr,
 324                                        char *buf)
 325 {
 326         struct obd_device *obd = container_of(kobj, struct obd_device,
 327                                               obd_kset.kobj);
 328         struct osc_device *od = obd2osc_dev(obd);
 329
 330         return sprintf(buf, "%lld\n", od->od_contention_time);
 331 }
 332
 333 static ssize_t contention_seconds_store(struct kobject *kobj,
 334                                         struct attribute *attr,
 335                                         const char *buffer,
 336                                         size_t count)
 337 {
 338         struct obd_device *obd = container_of(kobj, struct obd_device,
 339                                               obd_kset.kobj);
 340         struct osc_device *od = obd2osc_dev(obd);
 341         time64_t val;
 342         int rc;
 343
 344         rc = kstrtoll(buffer, 0, &val);
 345         if (rc)
 346                 return rc;
 347
 348         od->od_contention_time = val;
 349
 350         return count;
 351 }
 352 LUSTRE_RW_ATTR(contention_seconds);
 353
 354 LUSTRE_ATTR(mds_conn_uuid, 0444, conn_uuid_show, NULL);
 355 LUSTRE_RO_ATTR(conn_uuid);
 356
 357 LUSTRE_RW_ATTR(ping);
 358
 359 static int mdc_cached_mb_seq_show(struct seq_file *m, void *v)
 360 {
 361         struct obd_device *obd = m->private;
 362         struct client_obd *cli = &obd->u.cli;
 363         int shift = 20 - PAGE_SHIFT;
 364
 365         seq_printf(m, "used_mb: %ld\n"
 366                    "busy_cnt: %ld\n"
 367                    "reclaim: %llu\n",
 368                    (atomic_long_read(&cli->cl_lru_in_list) +
 369                     atomic_long_read(&cli->cl_lru_busy)) >> shift,
 370                     atomic_long_read(&cli->cl_lru_busy),
 371                    cli->cl_lru_reclaim);
 372
 373         return 0;
 374 }
 375
 376 /* shrink the number of caching pages to a specific number */
 377 static ssize_t
 378 mdc_cached_mb_seq_write(struct file *file, const char __user *buffer,
 379                         size_t count, loff_t *off)
 380 {
 381         struct seq_file *sfl = file->private_data;
 382         struct obd_device *obd = sfl->private;
 383         struct client_obd *cli = &obd->u.cli;
 384         u64 pages_number;
 385         const char *tmp;
 386         long rc;
 387         char kernbuf[128];
 388
 389         if (count >= sizeof(kernbuf))
 390                 return -EINVAL;
 391
 392         if (copy_from_user(kernbuf, buffer, count))
 393                 return -EFAULT;
 394         kernbuf[count] = 0;
 395
 396         tmp = lprocfs_find_named_value(kernbuf, "used_mb:", &count);
 397         rc = sysfs_memparse(tmp, count, &pages_number, "MiB");
 398         if (rc < 0)
 399                 return rc;
 400
 401         pages_number >>= PAGE_SHIFT;
 402
 403         rc = atomic_long_read(&cli->cl_lru_in_list) - pages_number;
 404         if (rc > 0) {
 405                 struct lu_env *env;
 406                 __u16 refcheck;
 407
 408                 env = cl_env_get(&refcheck);
 409                 if (!IS_ERR(env)) {
 410                         (void)osc_lru_shrink(env, cli, rc, true);
 411                         cl_env_put(env, &refcheck);
 412                 }
 413         }
 414
 415         return count;
 416 }
 417 LPROC_SEQ_FOPS(mdc_cached_mb);
 418
 419 static int mdc_unstable_stats_seq_show(struct seq_file *m, void *v)
 420 {
 421         struct obd_device *obd = m->private;
 422         struct client_obd *cli = &obd->u.cli;
 423         long pages;
 424         int mb;
 425
 426         pages = atomic_long_read(&cli->cl_unstable_count);
 427         mb    = (pages * PAGE_SIZE) >> 20;
 428
 429         seq_printf(m, "unstable_pages: %20ld\n"
 430                    "unstable_mb:              %10d\n", pages, mb);
 431         return 0;
 432 }
 433 LPROC_SEQ_FOPS_RO(mdc_unstable_stats);
 434
 435 static ssize_t mdc_rpc_stats_seq_write(struct file *file,
 436                                        const char __user *buf,
 437                                        size_t len, loff_t *off)
 438 {
 439         struct seq_file *seq = file->private_data;
 440         struct obd_device *obd = seq->private;
 441         struct client_obd *cli = &obd->u.cli;
 442
 443         lprocfs_oh_clear(&cli->cl_mod_rpcs_hist);
 444
 445         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 446         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 447         lprocfs_oh_clear(&cli->cl_read_page_hist);
 448         lprocfs_oh_clear(&cli->cl_write_page_hist);
 449         lprocfs_oh_clear(&cli->cl_read_offset_hist);
 450         lprocfs_oh_clear(&cli->cl_write_offset_hist);
 451
 452         return len;
 453 }
 454
 455 static int mdc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 456 {
 457         struct obd_device *obd = seq->private;
 458         struct client_obd *cli = &obd->u.cli;
 459         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 460         int i;
 461
 462         obd_mod_rpc_stats_seq_show(cli, seq);
 463
 464         spin_lock(&cli->cl_loi_list_lock);
 465
 466         seq_printf(seq, "\nread RPCs in flight:  %d\n",
 467                    cli->cl_r_in_flight);
 468         seq_printf(seq, "write RPCs in flight: %d\n",
 469                    cli->cl_w_in_flight);
 470         seq_printf(seq, "pending write pages:  %d\n",
 471                    atomic_read(&cli->cl_pending_w_pages));
 472         seq_printf(seq, "pending read pages:   %d\n",
 473                    atomic_read(&cli->cl_pending_r_pages));
 474
 475         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 476         seq_printf(seq, "pages per rpc         rpcs   %% cum %% |");
 477         seq_printf(seq, "       rpcs   %% cum %%\n");
 478
 479         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 480         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 481
 482         read_cum = 0;
 483         write_cum = 0;
 484         for (i = 0; i < OBD_HIST_MAX; i++) {
 485                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 486                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 487
 488                 read_cum += r;
 489                 write_cum += w;
 490                 seq_printf(seq, "%d:\t\t%10lu %3u %3u   | %10lu %3u %3u\n",
 491                            1 << i, r, pct(r, read_tot),
 492                            pct(read_cum, read_tot), w,
 493                            pct(w, write_tot),
 494                            pct(write_cum, write_tot));
 495                 if (read_cum == read_tot && write_cum == write_tot)
 496                         break;
 497         }
 498
 499         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 500         seq_printf(seq, "rpcs in flight        rpcs   %% cum %% |");
 501         seq_printf(seq, "       rpcs   %% cum %%\n");
 502
 503         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 504         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
 505
 506         read_cum = 0;
 507         write_cum = 0;
 508         for (i = 1; i < OBD_HIST_MAX; i++) {
 509                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
 510                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
 511
 512                 read_cum += r;
 513                 write_cum += w;
 514                 seq_printf(seq, "%d:\t\t%10lu %3u %3u   | %10lu %3u %3u\n",
 515                            i, r, pct(r, read_tot), pct(read_cum, read_tot), w,
 516                            pct(w, write_tot), pct(write_cum, write_tot));
 517                 if (read_cum == read_tot && write_cum == write_tot)
 518                         break;
 519         }
 520
 521         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 522         seq_printf(seq, "offset                rpcs   %% cum %% |");
 523         seq_printf(seq, "       rpcs   %% cum %%\n");
 524
 525         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
 526         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist);
 527
 528         read_cum = 0;
 529         write_cum = 0;
 530         for (i = 0; i < OBD_HIST_MAX; i++) {
 531                 unsigned long r = cli->cl_read_offset_hist.oh_buckets[i];
 532                 unsigned long w = cli->cl_write_offset_hist.oh_buckets[i];
 533
 534                 read_cum += r;
 535                 write_cum += w;
 536                 seq_printf(seq, "%d:\t\t%10lu %3u %3u   | %10lu %3u %3u\n",
 537                            (i == 0) ? 0 : 1 << (i - 1),
 538                            r, pct(r, read_tot), pct(read_cum, read_tot),
 539                            w, pct(w, write_tot), pct(write_cum, write_tot));
 540                 if (read_cum == read_tot && write_cum == write_tot)
 541                         break;
 542         }
 543         spin_unlock(&cli->cl_loi_list_lock);
 544
 545         return 0;
 546 }
 547 LPROC_SEQ_FOPS(mdc_rpc_stats);
 548
 549 static int mdc_stats_seq_show(struct seq_file *seq, void *v)
 550 {
 551         struct timespec64 now;
 552         struct obd_device *obd = seq->private;
 553         struct osc_stats *stats = &obd2osc_dev(obd)->od_stats;
 554
 555         ktime_get_real_ts64(&now);
 556
 557         seq_printf(seq, "snapshot_time:         %lld.%09lu (secs.nsecs)\n",
 558                    (s64)now.tv_sec, now.tv_nsec);
 559         seq_printf(seq, "lockless_write_bytes\t\t%llu\n",
 560                    stats->os_lockless_writes);
 561         seq_printf(seq, "lockless_read_bytes\t\t%llu\n",
 562                    stats->os_lockless_reads);
 563         seq_printf(seq, "lockless_truncate\t\t%llu\n",
 564                    stats->os_lockless_truncates);
 565         return 0;
 566 }
 567
 568 static ssize_t mdc_stats_seq_write(struct file *file,
 569                                    const char __user *buf,
 570                                    size_t len, loff_t *off)
 571 {
 572         struct seq_file *seq = file->private_data;
 573         struct obd_device *obd = seq->private;
 574         struct osc_stats *stats = &obd2osc_dev(obd)->od_stats;
 575
 576         memset(stats, 0, sizeof(*stats));
 577         return len;
 578 }
 579 LPROC_SEQ_FOPS(mdc_stats);
 580
 581 static int mdc_dom_min_repsize_seq_show(struct seq_file *m, void *v)
 582 {
 583         struct obd_device *obd = m->private;
 584
 585         seq_printf(m, "%u\n", obd->u.cli.cl_dom_min_inline_repsize);
 586
 587         return 0;
 588 }
 589
 590 static ssize_t mdc_dom_min_repsize_seq_write(struct file *file,
 591                                              const char __user *buffer,
 592                                              size_t count, loff_t *off)
 593 {
 594         struct seq_file *m = file->private_data;
 595         struct obd_device *obd = m->private;
 596         unsigned int val;
 597         int rc;
 598
 599         rc = kstrtouint_from_user(buffer, count, 0, &val);
 600         if (rc)
 601                 return rc;
 602
 603         if (val > MDC_DOM_MAX_INLINE_REPSIZE)
 604                 return -ERANGE;
 605
 606         obd->u.cli.cl_dom_min_inline_repsize = val;
 607         return count;
 608 }
 609 LPROC_SEQ_FOPS(mdc_dom_min_repsize);
 610
 611 LPROC_SEQ_FOPS_RO_TYPE(mdc, connect_flags);
 612 LPROC_SEQ_FOPS_RO_TYPE(mdc, server_uuid);
 613 LPROC_SEQ_FOPS_RO_TYPE(mdc, timeouts);
 614 LPROC_SEQ_FOPS_RO_TYPE(mdc, state);
 615 LPROC_SEQ_FOPS_RW_TYPE(mdc, obd_max_pages_per_rpc);
 616 LPROC_SEQ_FOPS_RW_TYPE(mdc, import);
 617 LPROC_SEQ_FOPS_RW_TYPE(mdc, pinger_recov);
 618
 619 struct lprocfs_vars lprocfs_mdc_obd_vars[] = {
 620         { .name =       "connect_flags",
 621           .fops =       &mdc_connect_flags_fops },
 622         { .name =       "mds_server_uuid",
 623           .fops =       &mdc_server_uuid_fops   },
 624         { .name =       "max_pages_per_rpc",
 625           .fops =       &mdc_obd_max_pages_per_rpc_fops },
 626         { .name =       "max_dirty_mb",
 627           .fops =       &mdc_max_dirty_mb_fops          },
 628         { .name =       "mdc_cached_mb",
 629           .fops =       &mdc_cached_mb_fops             },
 630         { .name =       "checksum_type",
 631           .fops =       &mdc_checksum_type_fops         },
 632         { .name =       "timeouts",
 633           .fops =       &mdc_timeouts_fops              },
 634         { .name =       "import",
 635           .fops =       &mdc_import_fops                },
 636         { .name =       "state",
 637           .fops =       &mdc_state_fops                 },
 638         { .name =       "pinger_recov",
 639           .fops =       &mdc_pinger_recov_fops          },
 640         { .name =       "rpc_stats",
 641           .fops =       &mdc_rpc_stats_fops             },
 642         { .name =       "unstable_stats",
 643           .fops =       &mdc_unstable_stats_fops        },
 644         { .name =       "mdc_stats",
 645           .fops =       &mdc_stats_fops                 },
 646         { .name =       "mdc_dom_min_repsize",
 647           .fops =       &mdc_dom_min_repsize_fops       },
 648         { NULL }
 649 };
 650
 651 static struct attribute *mdc_attrs[] = {
 652         &lustre_attr_active.attr,
 653         &lustre_attr_checksums.attr,
 654         &lustre_attr_checksum_dump.attr,
 655         &lustre_attr_max_rpcs_in_flight.attr,
 656         &lustre_attr_max_mod_rpcs_in_flight.attr,
 657         &lustre_attr_contention_seconds.attr,
 658         &lustre_attr_mds_conn_uuid.attr,
 659         &lustre_attr_conn_uuid.attr,
 660         &lustre_attr_ping.attr,
 661         NULL,
 662 };
 663
 664 int mdc_tunables_init(struct obd_device *obd)
 665 {
 666         int rc;
 667
 668         obd->obd_ktype.default_attrs = mdc_attrs;
 669         obd->obd_vars = lprocfs_mdc_obd_vars;
 670
 671         rc = lprocfs_obd_setup(obd, false);
 672         if (rc)
 673                 goto out_failed;
 674 #ifdef CONFIG_PROC_FS
 675         rc = lprocfs_alloc_md_stats(obd, 0);
 676         if (rc) {
 677                 lprocfs_obd_cleanup(obd);
 678                 goto out_failed;
 679         }
 680 #endif
 681         rc = sptlrpc_lprocfs_cliobd_attach(obd);
 682         if (rc) {
 683 #ifdef CONFIG_PROC_FS
 684                 lprocfs_free_md_stats(obd);
 685 #endif
 686                 lprocfs_obd_cleanup(obd);
 687                 goto out_failed;
 688         }
 689         ptlrpc_lprocfs_register_obd(obd);
 690
 691 out_failed:
 692         return rc;
 693 }