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  */
  31 #define DEBUG_SUBSYSTEM S_CLASS
  32
  33 #include <linux/vfs.h>
  34 #include <obd_class.h>
  35 #include <obd_cksum.h>
  36 #include <lprocfs_status.h>
  37 #include <lustre_osc.h>
  38 #include <cl_object.h>
  39 #include "mdc_internal.h"
  40
  41 static ssize_t active_show(struct kobject *kobj, struct attribute *attr,
  42                            char *buf)
  43 {
  44         struct obd_device *obd = container_of(kobj, struct obd_device,
  45                                               obd_kset.kobj);
  46         struct obd_import *imp;
  47         ssize_t len;
  48
  49         with_imp_locked(obd, imp, len)
  50                 len = sprintf(buf, "%d\n", !imp->imp_deactive);
  51         return len;
  52 }
  53
  54 static ssize_t active_store(struct kobject *kobj, struct attribute *attr,
  55                             const char *buffer, size_t count)
  56 {
  57         struct obd_device *obd = container_of(kobj, struct obd_device,
  58                                               obd_kset.kobj);
  59         struct obd_import *imp, *imp0;
  60         bool val;
  61         int rc;
  62
  63         rc = kstrtobool(buffer, &val);
  64         if (rc)
  65                 return rc;
  66
  67         with_imp_locked(obd, imp0, rc)
  68                 imp = class_import_get(imp0);
  69         if (rc)
  70                 return rc;
  71         /* opposite senses */
  72         if (imp->imp_deactive == val)
  73                 rc = ptlrpc_set_import_active(imp, val);
  74         else
  75                 CDEBUG(D_CONFIG, "activate %u: ignoring repeat request\n",
  76                        val);
  77         class_import_put(imp);
  78         return rc ?: count;
  79 }
  80 LUSTRE_RW_ATTR(active);
  81
  82 static ssize_t max_rpcs_in_flight_show(struct kobject *kobj,
  83                                        struct attribute *attr,
  84                                        char *buf)
  85 {
  86         struct obd_device *obd = container_of(kobj, struct obd_device,
  87                                               obd_kset.kobj);
  88         ssize_t len;
  89         u32 max;
  90
  91         max = obd_get_max_rpcs_in_flight(&obd->u.cli);
  92         len = sprintf(buf, "%u\n", max);
  93
  94         return len;
  95 }
  96
  97 static ssize_t max_rpcs_in_flight_store(struct kobject *kobj,
  98                                         struct attribute *attr,
  99                                         const char *buffer,
 100                                         size_t count)
 101 {
 102         struct obd_device *obd = container_of(kobj, struct obd_device,
 103                                               obd_kset.kobj);
 104         unsigned int val;
 105         int rc;
 106
 107         rc = kstrtouint(buffer, 10, &val);
 108         if (rc)
 109                 return rc;
 110
 111         rc = obd_set_max_rpcs_in_flight(&obd->u.cli, val);
 112         if (rc)
 113                 count = rc;
 114
 115         return count;
 116 }
 117 LUSTRE_RW_ATTR(max_rpcs_in_flight);
 118
 119 static ssize_t max_mod_rpcs_in_flight_show(struct kobject *kobj,
 120                                            struct attribute *attr,
 121                                            char *buf)
 122 {
 123         struct obd_device *obd = container_of(kobj, struct obd_device,
 124                                               obd_kset.kobj);
 125         u16 max;
 126
 127         max = obd_get_max_mod_rpcs_in_flight(&obd->u.cli);
 128         return sprintf(buf, "%hu\n", max);
 129 }
 130
 131 static ssize_t max_mod_rpcs_in_flight_store(struct kobject *kobj,
 132                                             struct attribute *attr,
 133                                             const char *buffer,
 134                                             size_t count)
 135 {
 136         struct obd_device *obd = container_of(kobj, struct obd_device,
 137                                               obd_kset.kobj);
 138         u16 val;
 139         int rc;
 140
 141         rc = kstrtou16(buffer, 10, &val);
 142         if (rc)
 143                 return rc;
 144
 145         rc = obd_set_max_mod_rpcs_in_flight(&obd->u.cli, val);
 146         if (rc)
 147                 count = rc;
 148
 149         return count;
 150 }
 151 LUSTRE_RW_ATTR(max_mod_rpcs_in_flight);
 152
 153 static int mdc_max_dirty_mb_seq_show(struct seq_file *m, void *v)
 154 {
 155         struct obd_device *obd = m->private;
 156         struct client_obd *cli = &obd->u.cli;
 157
 158         seq_printf(m, "%lu\n", PAGES_TO_MiB(cli->cl_dirty_max_pages));
 159         return 0;
 160 }
 161
 162 static ssize_t mdc_max_dirty_mb_seq_write(struct file *file,
 163                                           const char __user *buffer,
 164                                           size_t count, loff_t *off)
 165 {
 166         struct seq_file *sfl = file->private_data;
 167         struct obd_device *obd = sfl->private;
 168         struct client_obd *cli = &obd->u.cli;
 169         char kernbuf[22] = "";
 170         u64 pages_number;
 171         int rc;
 172
 173         if (count >= sizeof(kernbuf))
 174                 return -EINVAL;
 175
 176         if (copy_from_user(kernbuf, buffer, count))
 177                 return -EFAULT;
 178         kernbuf[count] = 0;
 179
 180         rc = sysfs_memparse(kernbuf, count, &pages_number, "MiB");
 181         if (rc < 0)
 182                 return rc;
 183
 184         /* MB -> pages */
 185         pages_number = round_up(pages_number, 1024 * 1024) >> PAGE_SHIFT;
 186         if (pages_number <= 0 ||
 187             pages_number >= MiB_TO_PAGES(OSC_MAX_DIRTY_MB_MAX) ||
 188             pages_number > cfs_totalram_pages() / 4) /* 1/4 of RAM */
 189                 return -ERANGE;
 190
 191         spin_lock(&cli->cl_loi_list_lock);
 192         cli->cl_dirty_max_pages = pages_number;
 193         osc_wake_cache_waiters(cli);
 194         spin_unlock(&cli->cl_loi_list_lock);
 195
 196         return count;
 197 }
 198 LPROC_SEQ_FOPS(mdc_max_dirty_mb);
 199
 200 DECLARE_CKSUM_NAME;
 201
 202 static int mdc_checksum_type_seq_show(struct seq_file *m, void *v)
 203 {
 204         struct obd_device *obd = m->private;
 205         int i;
 206
 207         if (obd == NULL)
 208                 return 0;
 209
 210         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 211                 if ((BIT(i) & obd->u.cli.cl_supp_cksum_types) == 0)
 212                         continue;
 213                 if (obd->u.cli.cl_cksum_type == BIT(i))
 214                         seq_printf(m, "[%s] ", cksum_name[i]);
 215                 else
 216                         seq_printf(m, "%s ", cksum_name[i]);
 217         }
 218         seq_puts(m, "\n");
 219
 220         return 0;
 221 }
 222
 223 static ssize_t mdc_checksum_type_seq_write(struct file *file,
 224                                            const char __user *buffer,
 225                                            size_t count, loff_t *off)
 226 {
 227         struct seq_file *m = file->private_data;
 228         struct obd_device *obd = m->private;
 229         char kernbuf[10];
 230         int rc = -EINVAL;
 231         int i;
 232
 233         if (obd == NULL)
 234                 return 0;
 235
 236         if (count > sizeof(kernbuf) - 1)
 237                 return -EINVAL;
 238         if (copy_from_user(kernbuf, buffer, count))
 239                 return -EFAULT;
 240
 241         if (count > 0 && kernbuf[count - 1] == '\n')
 242                 kernbuf[count - 1] = '\0';
 243         else
 244                 kernbuf[count] = '\0';
 245
 246         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 247                 if (strcmp(kernbuf, cksum_name[i]) == 0) {
 248                         obd->u.cli.cl_preferred_cksum_type = BIT(i);
 249                         if (obd->u.cli.cl_supp_cksum_types & BIT(i)) {
 250                                 obd->u.cli.cl_cksum_type = BIT(i);
 251                                 rc = count;
 252                         } else {
 253                                 rc = -ENOTSUPP;
 254                         }
 255                         break;
 256                 }
 257         }
 258
 259         return rc;
 260 }
 261 LPROC_SEQ_FOPS(mdc_checksum_type);
 262
 263 static ssize_t checksums_show(struct kobject *kobj,
 264                               struct attribute *attr, char *buf)
 265 {
 266         struct obd_device *obd = container_of(kobj, struct obd_device,
 267                                               obd_kset.kobj);
 268
 269         return scnprintf(buf, PAGE_SIZE, "%d\n", !!obd->u.cli.cl_checksum);
 270 }
 271
 272 static ssize_t checksums_store(struct kobject *kobj,
 273                                struct attribute *attr,
 274                                const char *buffer,
 275                                size_t count)
 276 {
 277         struct obd_device *obd = container_of(kobj, struct obd_device,
 278                                               obd_kset.kobj);
 279         bool val;
 280         int rc;
 281
 282         rc = kstrtobool(buffer, &val);
 283         if (rc)
 284                 return rc;
 285
 286         obd->u.cli.cl_checksum = val;
 287
 288         return count;
 289 }
 290 LUSTRE_RW_ATTR(checksums);
 291
 292 static ssize_t checksum_dump_show(struct kobject *kobj,
 293                                   struct attribute *attr, char *buf)
 294 {
 295         struct obd_device *obd = container_of(kobj, struct obd_device,
 296                                               obd_kset.kobj);
 297
 298         return scnprintf(buf, PAGE_SIZE, "%d\n", !!obd->u.cli.cl_checksum_dump);
 299 }
 300
 301 static ssize_t checksum_dump_store(struct kobject *kobj,
 302                                    struct attribute *attr,
 303                                    const char *buffer,
 304                                    size_t count)
 305 {
 306         struct obd_device *obd = container_of(kobj, struct obd_device,
 307                                               obd_kset.kobj);
 308         bool val;
 309         int rc;
 310
 311         rc = kstrtobool(buffer, &val);
 312         if (rc)
 313                 return rc;
 314
 315         obd->u.cli.cl_checksum_dump = val;
 316
 317         return count;
 318 }
 319 LUSTRE_RW_ATTR(checksum_dump);
 320
 321 static ssize_t contention_seconds_show(struct kobject *kobj,
 322                                        struct attribute *attr,
 323                                        char *buf)
 324 {
 325         struct obd_device *obd = container_of(kobj, struct obd_device,
 326                                               obd_kset.kobj);
 327         struct osc_device *od = obd2osc_dev(obd);
 328
 329         return sprintf(buf, "%lld\n", od->od_contention_time);
 330 }
 331
 332 static ssize_t contention_seconds_store(struct kobject *kobj,
 333                                         struct attribute *attr,
 334                                         const char *buffer,
 335                                         size_t count)
 336 {
 337         struct obd_device *obd = container_of(kobj, struct obd_device,
 338                                               obd_kset.kobj);
 339         struct osc_device *od = obd2osc_dev(obd);
 340         time64_t val;
 341         int rc;
 342
 343         rc = kstrtoll(buffer, 0, &val);
 344         if (rc)
 345                 return rc;
 346
 347         od->od_contention_time = val;
 348
 349         return count;
 350 }
 351 LUSTRE_RW_ATTR(contention_seconds);
 352
 353 LUSTRE_ATTR(mds_conn_uuid, 0444, conn_uuid_show, NULL);
 354 LUSTRE_RO_ATTR(conn_uuid);
 355
 356 LUSTRE_RW_ATTR(ping);
 357
 358 static int mdc_cached_mb_seq_show(struct seq_file *m, void *v)
 359 {
 360         struct obd_device *obd = m->private;
 361         struct client_obd *cli = &obd->u.cli;
 362         int shift = 20 - PAGE_SHIFT;
 363
 364         seq_printf(m, "used_mb: %ld\n"
 365                    "busy_cnt: %ld\n"
 366                    "reclaim: %llu\n",
 367                    (atomic_long_read(&cli->cl_lru_in_list) +
 368                     atomic_long_read(&cli->cl_lru_busy)) >> shift,
 369                     atomic_long_read(&cli->cl_lru_busy),
 370                    cli->cl_lru_reclaim);
 371
 372         return 0;
 373 }
 374
 375 /* shrink the number of caching pages to a specific number */
 376 static ssize_t
 377 mdc_cached_mb_seq_write(struct file *file, const char __user *buffer,
 378                         size_t count, loff_t *off)
 379 {
 380         struct seq_file *sfl = file->private_data;
 381         struct obd_device *obd = sfl->private;
 382         struct client_obd *cli = &obd->u.cli;
 383         u64 pages_number;
 384         const char *tmp;
 385         long rc;
 386         char kernbuf[128];
 387
 388         if (count >= sizeof(kernbuf))
 389                 return -EINVAL;
 390
 391         if (copy_from_user(kernbuf, buffer, count))
 392                 return -EFAULT;
 393         kernbuf[count] = 0;
 394
 395         tmp = lprocfs_find_named_value(kernbuf, "used_mb:", &count);
 396         rc = sysfs_memparse(tmp, count, &pages_number, "MiB");
 397         if (rc < 0)
 398                 return rc;
 399
 400         pages_number >>= PAGE_SHIFT;
 401
 402         rc = atomic_long_read(&cli->cl_lru_in_list) - pages_number;
 403         if (rc > 0) {
 404                 struct lu_env *env;
 405                 __u16 refcheck;
 406
 407                 env = cl_env_get(&refcheck);
 408                 if (!IS_ERR(env)) {
 409                         (void)osc_lru_shrink(env, cli, rc, true);
 410                         cl_env_put(env, &refcheck);
 411                 }
 412         }
 413
 414         return count;
 415 }
 416 LPROC_SEQ_FOPS(mdc_cached_mb);
 417
 418 static int mdc_unstable_stats_seq_show(struct seq_file *m, void *v)
 419 {
 420         struct obd_device *obd = m->private;
 421         struct client_obd *cli = &obd->u.cli;
 422         long pages;
 423         int mb;
 424
 425         pages = atomic_long_read(&cli->cl_unstable_count);
 426         mb    = (pages * PAGE_SIZE) >> 20;
 427
 428         seq_printf(m, "unstable_pages: %20ld\n"
 429                    "unstable_mb:              %10d\n", pages, mb);
 430         return 0;
 431 }
 432 LPROC_SEQ_FOPS_RO(mdc_unstable_stats);
 433
 434 static ssize_t mdc_rpc_stats_seq_write(struct file *file,
 435                                        const char __user *buf,
 436                                        size_t len, loff_t *off)
 437 {
 438         struct seq_file *seq = file->private_data;
 439         struct obd_device *obd = seq->private;
 440         struct client_obd *cli = &obd->u.cli;
 441
 442         lprocfs_oh_clear(&cli->cl_mod_rpcs_hist);
 443
 444         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 445         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 446         lprocfs_oh_clear(&cli->cl_read_page_hist);
 447         lprocfs_oh_clear(&cli->cl_write_page_hist);
 448         lprocfs_oh_clear(&cli->cl_read_offset_hist);
 449         lprocfs_oh_clear(&cli->cl_write_offset_hist);
 450
 451         return len;
 452 }
 453
 454 static int mdc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 455 {
 456         struct obd_device *obd = seq->private;
 457         struct client_obd *cli = &obd->u.cli;
 458         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 459         int i;
 460
 461         obd_mod_rpc_stats_seq_show(cli, seq);
 462
 463         spin_lock(&cli->cl_loi_list_lock);
 464
 465         seq_printf(seq, "\nread RPCs in flight:  %d\n",
 466                    cli->cl_r_in_flight);
 467         seq_printf(seq, "write RPCs in flight: %d\n",
 468                    cli->cl_w_in_flight);
 469         seq_printf(seq, "pending write pages:  %d\n",
 470                    atomic_read(&cli->cl_pending_w_pages));
 471         seq_printf(seq, "pending read pages:   %d\n",
 472                    atomic_read(&cli->cl_pending_r_pages));
 473
 474         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 475         seq_printf(seq, "pages per rpc         rpcs   %% cum %% |");
 476         seq_printf(seq, "       rpcs   %% cum %%\n");
 477
 478         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 479         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 480
 481         read_cum = 0;
 482         write_cum = 0;
 483         for (i = 0; i < OBD_HIST_MAX; i++) {
 484                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 485                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 486
 487                 read_cum += r;
 488                 write_cum += w;
 489                 seq_printf(seq, "%d:\t\t%10lu %3u %3u   | %10lu %3u %3u\n",
 490                            1 << i, r, pct(r, read_tot),
 491                            pct(read_cum, read_tot), w,
 492                            pct(w, write_tot),
 493                            pct(write_cum, write_tot));
 494                 if (read_cum == read_tot && write_cum == write_tot)
 495                         break;
 496         }
 497
 498         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 499         seq_printf(seq, "rpcs in flight        rpcs   %% cum %% |");
 500         seq_printf(seq, "       rpcs   %% cum %%\n");
 501
 502         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 503         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
 504
 505         read_cum = 0;
 506         write_cum = 0;
 507         for (i = 1; i < OBD_HIST_MAX; i++) {
 508                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
 509                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
 510
 511                 read_cum += r;
 512                 write_cum += w;
 513                 seq_printf(seq, "%d:\t\t%10lu %3u %3u   | %10lu %3u %3u\n",
 514                            i, r, pct(r, read_tot), pct(read_cum, read_tot), w,
 515                            pct(w, write_tot), pct(write_cum, write_tot));
 516                 if (read_cum == read_tot && write_cum == write_tot)
 517                         break;
 518         }
 519
 520         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 521         seq_printf(seq, "offset                rpcs   %% cum %% |");
 522         seq_printf(seq, "       rpcs   %% cum %%\n");
 523
 524         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
 525         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist);
 526
 527         read_cum = 0;
 528         write_cum = 0;
 529         for (i = 0; i < OBD_HIST_MAX; i++) {
 530                 unsigned long r = cli->cl_read_offset_hist.oh_buckets[i];
 531                 unsigned long w = cli->cl_write_offset_hist.oh_buckets[i];
 532
 533                 read_cum += r;
 534                 write_cum += w;
 535                 seq_printf(seq, "%d:\t\t%10lu %3u %3u   | %10lu %3u %3u\n",
 536                            (i == 0) ? 0 : 1 << (i - 1),
 537                            r, pct(r, read_tot), pct(read_cum, read_tot),
 538                            w, pct(w, write_tot), pct(write_cum, write_tot));
 539                 if (read_cum == read_tot && write_cum == write_tot)
 540                         break;
 541         }
 542         spin_unlock(&cli->cl_loi_list_lock);
 543
 544         return 0;
 545 }
 546 LPROC_SEQ_FOPS(mdc_rpc_stats);
 547
 548 static int mdc_stats_seq_show(struct seq_file *seq, void *v)
 549 {
 550         struct timespec64 now;
 551         struct obd_device *obd = seq->private;
 552         struct osc_stats *stats = &obd2osc_dev(obd)->od_stats;
 553
 554         ktime_get_real_ts64(&now);
 555
 556         seq_printf(seq, "snapshot_time:         %lld.%09lu (secs.nsecs)\n",
 557                    (s64)now.tv_sec, now.tv_nsec);
 558         seq_printf(seq, "lockless_write_bytes\t\t%llu\n",
 559                    stats->os_lockless_writes);
 560         seq_printf(seq, "lockless_read_bytes\t\t%llu\n",
 561                    stats->os_lockless_reads);
 562         return 0;
 563 }
 564
 565 static ssize_t mdc_stats_seq_write(struct file *file,
 566                                    const char __user *buf,
 567                                    size_t len, loff_t *off)
 568 {
 569         struct seq_file *seq = file->private_data;
 570         struct obd_device *obd = seq->private;
 571         struct osc_stats *stats = &obd2osc_dev(obd)->od_stats;
 572
 573         memset(stats, 0, sizeof(*stats));
 574         return len;
 575 }
 576 LPROC_SEQ_FOPS(mdc_stats);
 577
 578 static int mdc_dom_min_repsize_seq_show(struct seq_file *m, void *v)
 579 {
 580         struct obd_device *obd = m->private;
 581
 582         seq_printf(m, "%u\n", obd->u.cli.cl_dom_min_inline_repsize);
 583
 584         return 0;
 585 }
 586
 587 static ssize_t mdc_dom_min_repsize_seq_write(struct file *file,
 588                                              const char __user *buffer,
 589                                              size_t count, loff_t *off)
 590 {
 591         struct seq_file *m = file->private_data;
 592         struct obd_device *obd = m->private;
 593         unsigned int val;
 594         int rc;
 595
 596         rc = kstrtouint_from_user(buffer, count, 0, &val);
 597         if (rc)
 598                 return rc;
 599
 600         if (val > MDC_DOM_MAX_INLINE_REPSIZE)
 601                 return -ERANGE;
 602
 603         obd->u.cli.cl_dom_min_inline_repsize = val;
 604         return count;
 605 }
 606 LPROC_SEQ_FOPS(mdc_dom_min_repsize);
 607
 608 LPROC_SEQ_FOPS_RO_TYPE(mdc, connect_flags);
 609 LPROC_SEQ_FOPS_RO_TYPE(mdc, server_uuid);
 610 LPROC_SEQ_FOPS_RO_TYPE(mdc, timeouts);
 611 LPROC_SEQ_FOPS_RO_TYPE(mdc, state);
 612 LPROC_SEQ_FOPS_RW_TYPE(mdc, obd_max_pages_per_rpc);
 613 LPROC_SEQ_FOPS_RW_TYPE(mdc, import);
 614 LPROC_SEQ_FOPS_RW_TYPE(mdc, pinger_recov);
 615
 616 struct lprocfs_vars lprocfs_mdc_obd_vars[] = {
 617         { .name =       "connect_flags",
 618           .fops =       &mdc_connect_flags_fops },
 619         { .name =       "mds_server_uuid",
 620           .fops =       &mdc_server_uuid_fops   },
 621         { .name =       "max_pages_per_rpc",
 622           .fops =       &mdc_obd_max_pages_per_rpc_fops },
 623         { .name =       "max_dirty_mb",
 624           .fops =       &mdc_max_dirty_mb_fops          },
 625         { .name =       "mdc_cached_mb",
 626           .fops =       &mdc_cached_mb_fops             },
 627         { .name =       "checksum_type",
 628           .fops =       &mdc_checksum_type_fops         },
 629         { .name =       "timeouts",
 630           .fops =       &mdc_timeouts_fops              },
 631         { .name =       "import",
 632           .fops =       &mdc_import_fops                },
 633         { .name =       "state",
 634           .fops =       &mdc_state_fops                 },
 635         { .name =       "pinger_recov",
 636           .fops =       &mdc_pinger_recov_fops          },
 637         { .name =       "rpc_stats",
 638           .fops =       &mdc_rpc_stats_fops             },
 639         { .name =       "unstable_stats",
 640           .fops =       &mdc_unstable_stats_fops        },
 641         { .name =       "mdc_stats",
 642           .fops =       &mdc_stats_fops                 },
 643         { .name =       "mdc_dom_min_repsize",
 644           .fops =       &mdc_dom_min_repsize_fops       },
 645         { NULL }
 646 };
 647
 648 static struct attribute *mdc_attrs[] = {
 649         &lustre_attr_active.attr,
 650         &lustre_attr_checksums.attr,
 651         &lustre_attr_checksum_dump.attr,
 652         &lustre_attr_max_rpcs_in_flight.attr,
 653         &lustre_attr_max_mod_rpcs_in_flight.attr,
 654         &lustre_attr_contention_seconds.attr,
 655         &lustre_attr_mds_conn_uuid.attr,
 656         &lustre_attr_conn_uuid.attr,
 657         &lustre_attr_ping.attr,
 658         NULL,
 659 };
 660
 661 int mdc_tunables_init(struct obd_device *obd)
 662 {
 663         int rc;
 664
 665         obd->obd_ktype.default_attrs = mdc_attrs;
 666         obd->obd_vars = lprocfs_mdc_obd_vars;
 667
 668         rc = lprocfs_obd_setup(obd, false);
 669         if (rc)
 670                 goto out_failed;
 671 #ifdef CONFIG_PROC_FS
 672         rc = lprocfs_alloc_md_stats(obd, 0);
 673         if (rc) {
 674                 lprocfs_obd_cleanup(obd);
 675                 goto out_failed;
 676         }
 677 #endif
 678         rc = sptlrpc_lprocfs_cliobd_attach(obd);
 679         if (rc) {
 680 #ifdef CONFIG_PROC_FS
 681                 lprocfs_free_md_stats(obd);
 682 #endif
 683                 lprocfs_obd_cleanup(obd);
 684                 goto out_failed;
 685         }
 686         ptlrpc_lprocfs_register_obd(obd);
 687
 688 out_failed:
 689         return rc;
 690 }