lustre/osc/lproc_osc.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/version.h>
  35 #include <asm/statfs.h>
  36 #include <obd_cksum.h>
  37 #include <obd_class.h>
  38 #include <lprocfs_status.h>
  39 #include <linux/seq_file.h>
  40 #include <lustre_osc.h>
  41
  42 #include "osc_internal.h"
  43
  44 static ssize_t active_show(struct kobject *kobj, struct attribute *attr,
  45                            char *buf)
  46 {
  47         struct obd_device *obd = container_of(kobj, struct obd_device,
  48                                               obd_kset.kobj);
  49         struct obd_import *imp;
  50         int rc;
  51
  52         with_imp_locked(obd, imp, rc)
  53                 rc = sprintf(buf, "%d\n", !imp->imp_deactive);
  54
  55         return rc;
  56 }
  57
  58 static ssize_t active_store(struct kobject *kobj, struct attribute *attr,
  59                             const char *buffer, size_t count)
  60 {
  61         struct obd_device *obd = container_of(kobj, struct obd_device,
  62                                               obd_kset.kobj);
  63         bool val;
  64         int rc;
  65
  66         rc = kstrtobool(buffer, &val);
  67         if (rc)
  68                 return rc;
  69
  70         /* opposite senses */
  71         if (obd->u.cli.cl_import->imp_deactive == val)
  72                 rc = ptlrpc_set_import_active(obd->u.cli.cl_import, val);
  73         else
  74                 CDEBUG(D_CONFIG, "activate %u: ignoring repeat request\n",
  75                        (unsigned int)val);
  76
  77         return count;
  78 }
  79 LUSTRE_RW_ATTR(active);
  80
  81 static ssize_t max_rpcs_in_flight_show(struct kobject *kobj,
  82                                        struct attribute *attr,
  83                                        char *buf)
  84 {
  85         struct obd_device *obd = container_of(kobj, struct obd_device,
  86                                               obd_kset.kobj);
  87         struct client_obd *cli = &obd->u.cli;
  88
  89         return  scnprintf(buf, PAGE_SIZE, "%u\n", cli->cl_max_rpcs_in_flight);
  90 }
  91
  92 static ssize_t max_rpcs_in_flight_store(struct kobject *kobj,
  93                                         struct attribute *attr,
  94                                         const char *buffer,
  95                                         size_t count)
  96 {
  97         struct obd_device *obd = container_of(kobj, struct obd_device,
  98                                               obd_kset.kobj);
  99         struct client_obd *cli = &obd->u.cli;
 100         int adding, added, req_count;
 101         unsigned int val;
 102         int rc;
 103
 104         rc = kstrtouint(buffer, 0, &val);
 105         if (rc)
 106                 return rc;
 107
 108         if (val == 0 || val > OSC_MAX_RIF_MAX)
 109                 return -ERANGE;
 110
 111         adding = (int)val - cli->cl_max_rpcs_in_flight;
 112         req_count = atomic_read(&osc_pool_req_count);
 113         if (adding > 0 && req_count < osc_reqpool_maxreqcount) {
 114                 /*
 115                  * There might be some race which will cause over-limit
 116                  * allocation, but it is fine.
 117                  */
 118                 if (req_count + adding > osc_reqpool_maxreqcount)
 119                         adding = osc_reqpool_maxreqcount - req_count;
 120
 121                 added = osc_rq_pool->prp_populate(osc_rq_pool, adding);
 122                 atomic_add(added, &osc_pool_req_count);
 123         }
 124
 125         spin_lock(&cli->cl_loi_list_lock);
 126         cli->cl_max_rpcs_in_flight = val;
 127         client_adjust_max_dirty(cli);
 128         spin_unlock(&cli->cl_loi_list_lock);
 129
 130         return count;
 131 }
 132 LUSTRE_RW_ATTR(max_rpcs_in_flight);
 133
 134 static ssize_t max_dirty_mb_show(struct kobject *kobj,
 135                                  struct attribute *attr,
 136                                  char *buf)
 137 {
 138         struct obd_device *obd = container_of(kobj, struct obd_device,
 139                                               obd_kset.kobj);
 140         struct client_obd *cli = &obd->u.cli;
 141
 142         return scnprintf(buf, PAGE_SIZE, "%lu\n",
 143                          PAGES_TO_MiB(cli->cl_dirty_max_pages));
 144 }
 145
 146 static ssize_t max_dirty_mb_store(struct kobject *kobj,
 147                                   struct attribute *attr,
 148                                   const char *buffer,
 149                                   size_t count)
 150 {
 151         struct obd_device *obd = container_of(kobj, struct obd_device,
 152                                               obd_kset.kobj);
 153         struct client_obd *cli = &obd->u.cli;
 154         unsigned long pages_number, max_dirty_mb;
 155         int rc;
 156
 157         rc = kstrtoul(buffer, 10, &max_dirty_mb);
 158         if (rc)
 159                 return rc;
 160
 161         pages_number = MiB_TO_PAGES(max_dirty_mb);
 162
 163         if (pages_number >= MiB_TO_PAGES(OSC_MAX_DIRTY_MB_MAX) ||
 164             pages_number > cfs_totalram_pages() / 4) /* 1/4 of RAM */
 165                 return -ERANGE;
 166
 167         spin_lock(&cli->cl_loi_list_lock);
 168         cli->cl_dirty_max_pages = pages_number;
 169         osc_wake_cache_waiters(cli);
 170         spin_unlock(&cli->cl_loi_list_lock);
 171
 172         return count;
 173 }
 174 LUSTRE_RW_ATTR(max_dirty_mb);
 175
 176 LUSTRE_ATTR(ost_conn_uuid, 0444, conn_uuid_show, NULL);
 177 LUSTRE_RO_ATTR(conn_uuid);
 178
 179 LUSTRE_RW_ATTR(ping);
 180
 181 static int osc_cached_mb_seq_show(struct seq_file *m, void *v)
 182 {
 183         struct obd_device *obd = m->private;
 184         struct client_obd *cli = &obd->u.cli;
 185         int shift = 20 - PAGE_SHIFT;
 186
 187         seq_printf(m, "used_mb: %ld\n"
 188                    "busy_cnt: %ld\n"
 189                    "reclaim: %llu\n",
 190                    (atomic_long_read(&cli->cl_lru_in_list) +
 191                     atomic_long_read(&cli->cl_lru_busy)) >> shift,
 192                     atomic_long_read(&cli->cl_lru_busy),
 193                    cli->cl_lru_reclaim);
 194
 195         return 0;
 196 }
 197
 198 /* shrink the number of caching pages to a specific number */
 199 static ssize_t osc_cached_mb_seq_write(struct file *file,
 200                                        const char __user *buffer,
 201                                        size_t count, loff_t *off)
 202 {
 203         struct seq_file *m = file->private_data;
 204         struct obd_device *obd = m->private;
 205         struct client_obd *cli = &obd->u.cli;
 206         u64 pages_number;
 207         const char *tmp;
 208         long rc;
 209         char kernbuf[128];
 210
 211         if (count >= sizeof(kernbuf))
 212                 return -EINVAL;
 213
 214         if (copy_from_user(kernbuf, buffer, count))
 215                 return -EFAULT;
 216         kernbuf[count] = 0;
 217
 218         tmp = lprocfs_find_named_value(kernbuf, "used_mb:", &count);
 219         rc = sysfs_memparse(tmp, count, &pages_number, "MiB");
 220         if (rc < 0)
 221                 return rc;
 222
 223         pages_number >>= PAGE_SHIFT;
 224
 225         rc = atomic_long_read(&cli->cl_lru_in_list) - pages_number;
 226         if (rc > 0) {
 227                 struct lu_env *env;
 228                 __u16 refcheck;
 229
 230                 env = cl_env_get(&refcheck);
 231                 if (!IS_ERR(env)) {
 232                         (void)osc_lru_shrink(env, cli, rc, true);
 233                         cl_env_put(env, &refcheck);
 234                 }
 235         }
 236
 237         return count;
 238 }
 239
 240 LPROC_SEQ_FOPS(osc_cached_mb);
 241
 242 static ssize_t cur_dirty_bytes_show(struct kobject *kobj,
 243                                     struct attribute *attr,
 244                                     char *buf)
 245 {
 246         struct obd_device *obd = container_of(kobj, struct obd_device,
 247                                               obd_kset.kobj);
 248         struct client_obd *cli = &obd->u.cli;
 249
 250         return scnprintf(buf, PAGE_SIZE, "%lu\n",
 251                          cli->cl_dirty_pages << PAGE_SHIFT);
 252 }
 253 LUSTRE_RO_ATTR(cur_dirty_bytes);
 254
 255 static int osc_cur_grant_bytes_seq_show(struct seq_file *m, void *v)
 256 {
 257         struct obd_device *obd = m->private;
 258         struct client_obd *cli = &obd->u.cli;
 259
 260         seq_printf(m, "%lu\n", cli->cl_avail_grant);
 261         return 0;
 262 }
 263
 264 static ssize_t osc_cur_grant_bytes_seq_write(struct file *file,
 265                                              const char __user *buffer,
 266                                              size_t count, loff_t *off)
 267 {
 268         struct seq_file *m = file->private_data;
 269         struct obd_device *obd = m->private;
 270         struct client_obd *cli = &obd->u.cli;
 271         struct obd_import *imp;
 272         char kernbuf[22] = "";
 273         u64 val;
 274         int rc;
 275
 276         if (obd == NULL)
 277                 return 0;
 278
 279         if (count >= sizeof(kernbuf))
 280                 return -EINVAL;
 281
 282         if (copy_from_user(kernbuf, buffer, count))
 283                 return -EFAULT;
 284         kernbuf[count] = 0;
 285
 286         rc = sysfs_memparse(kernbuf, count, &val, "MiB");
 287         if (rc < 0)
 288                 return rc;
 289
 290         /* this is only for shrinking grant */
 291         if (val >= cli->cl_avail_grant)
 292                 return 0;
 293
 294         with_imp_locked(obd, imp, rc)
 295                 if (imp->imp_state == LUSTRE_IMP_FULL)
 296                         rc = osc_shrink_grant_to_target(cli, val);
 297
 298         return rc ? rc : count;
 299 }
 300 LPROC_SEQ_FOPS(osc_cur_grant_bytes);
 301
 302 static ssize_t cur_lost_grant_bytes_show(struct kobject *kobj,
 303                                          struct attribute *attr,
 304                                          char *buf)
 305 {
 306         struct obd_device *obd = container_of(kobj, struct obd_device,
 307                                               obd_kset.kobj);
 308         struct client_obd *cli = &obd->u.cli;
 309
 310         return scnprintf(buf, PAGE_SIZE, "%lu\n", cli->cl_lost_grant);
 311 }
 312 LUSTRE_RO_ATTR(cur_lost_grant_bytes);
 313
 314 static ssize_t cur_dirty_grant_bytes_show(struct kobject *kobj,
 315                                           struct attribute *attr,
 316                                           char *buf)
 317 {
 318         struct obd_device *obd = container_of(kobj, struct obd_device,
 319                                               obd_kset.kobj);
 320         struct client_obd *cli = &obd->u.cli;
 321
 322         return scnprintf(buf, PAGE_SIZE, "%lu\n", cli->cl_dirty_grant);
 323 }
 324 LUSTRE_RO_ATTR(cur_dirty_grant_bytes);
 325
 326 static ssize_t grant_shrink_interval_show(struct kobject *kobj,
 327                                           struct attribute *attr,
 328                                           char *buf)
 329 {
 330         struct obd_device *obd = container_of(kobj, struct obd_device,
 331                                               obd_kset.kobj);
 332
 333         return sprintf(buf, "%lld\n", obd->u.cli.cl_grant_shrink_interval);
 334 }
 335
 336 static ssize_t grant_shrink_interval_store(struct kobject *kobj,
 337                                            struct attribute *attr,
 338                                            const char *buffer,
 339                                            size_t count)
 340 {
 341         struct obd_device *obd = container_of(kobj, struct obd_device,
 342                                               obd_kset.kobj);
 343         unsigned int val;
 344         int rc;
 345
 346         rc = kstrtouint(buffer, 0, &val);
 347         if (rc)
 348                 return rc;
 349
 350         if (val == 0)
 351                 return -ERANGE;
 352
 353         obd->u.cli.cl_grant_shrink_interval = val;
 354         osc_update_next_shrink(&obd->u.cli);
 355         osc_schedule_grant_work();
 356
 357         return count;
 358 }
 359 LUSTRE_RW_ATTR(grant_shrink_interval);
 360
 361 static ssize_t checksums_show(struct kobject *kobj,
 362                               struct attribute *attr,
 363                               char *buf)
 364 {
 365         struct obd_device *obd = container_of(kobj, struct obd_device,
 366                                               obd_kset.kobj);
 367
 368         return sprintf(buf, "%d\n", obd->u.cli.cl_checksum ? 1 : 0);
 369 }
 370
 371 static ssize_t checksums_store(struct kobject *kobj,
 372                                struct attribute *attr,
 373                                const char *buffer,
 374                                size_t count)
 375 {
 376         struct obd_device *obd = container_of(kobj, struct obd_device,
 377                                               obd_kset.kobj);
 378         bool val;
 379         int rc;
 380
 381         rc = kstrtobool(buffer, &val);
 382         if (rc)
 383                 return rc;
 384
 385         obd->u.cli.cl_checksum = val;
 386
 387         return count;
 388 }
 389 LUSTRE_RW_ATTR(checksums);
 390
 391 static int osc_checksum_type_seq_show(struct seq_file *m, void *v)
 392 {
 393         struct obd_device *obd = m->private;
 394         int i;
 395         DECLARE_CKSUM_NAME;
 396
 397         if (obd == NULL)
 398                 return 0;
 399
 400         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 401                 if ((BIT(i) & obd->u.cli.cl_supp_cksum_types) == 0)
 402                         continue;
 403                 if (obd->u.cli.cl_cksum_type == BIT(i))
 404                         seq_printf(m, "[%s] ", cksum_name[i]);
 405                 else
 406                         seq_printf(m, "%s ", cksum_name[i]);
 407         }
 408         seq_printf(m, "\n");
 409         return 0;
 410 }
 411
 412 static ssize_t osc_checksum_type_seq_write(struct file *file,
 413                                            const char __user *buffer,
 414                                            size_t count, loff_t *off)
 415 {
 416         struct seq_file *m = file->private_data;
 417         struct obd_device *obd = m->private;
 418         int i;
 419         DECLARE_CKSUM_NAME;
 420         char kernbuf[10];
 421         int rc = -EINVAL;
 422
 423         if (obd == NULL)
 424                 return 0;
 425
 426         if (count > sizeof(kernbuf) - 1)
 427                 return -EINVAL;
 428         if (copy_from_user(kernbuf, buffer, count))
 429                 return -EFAULT;
 430
 431         if (count > 0 && kernbuf[count - 1] == '\n')
 432                 kernbuf[count - 1] = '\0';
 433         else
 434                 kernbuf[count] = '\0';
 435
 436         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 437                 if (strcmp(kernbuf, cksum_name[i]) == 0) {
 438                         obd->u.cli.cl_preferred_cksum_type = BIT(i);
 439                         if (obd->u.cli.cl_supp_cksum_types & BIT(i)) {
 440                                 obd->u.cli.cl_cksum_type = BIT(i);
 441                                 rc = count;
 442                         } else {
 443                                 rc = -ENOTSUPP;
 444                         }
 445                         break;
 446                 }
 447         }
 448         return rc;
 449 }
 450 LPROC_SEQ_FOPS(osc_checksum_type);
 451
 452 static ssize_t resend_count_show(struct kobject *kobj,
 453                                  struct attribute *attr,
 454                                  char *buf)
 455 {
 456         struct obd_device *obd = container_of(kobj, struct obd_device,
 457                                               obd_kset.kobj);
 458
 459         return sprintf(buf, "%u\n", atomic_read(&obd->u.cli.cl_resends));
 460 }
 461
 462 static ssize_t resend_count_store(struct kobject *kobj,
 463                                   struct attribute *attr,
 464                                   const char *buffer,
 465                                   size_t count)
 466 {
 467         struct obd_device *obd = container_of(kobj, struct obd_device,
 468                                               obd_kset.kobj);
 469         unsigned int val;
 470         int rc;
 471
 472         rc = kstrtouint(buffer, 10, &val);
 473         if (rc)
 474                 return rc;
 475
 476         atomic_set(&obd->u.cli.cl_resends, val);
 477
 478         return count;
 479 }
 480 LUSTRE_RW_ATTR(resend_count);
 481
 482 static ssize_t checksum_dump_show(struct kobject *kobj,
 483                                   struct attribute *attr,
 484                                   char *buf)
 485 {
 486         struct obd_device *obd = container_of(kobj, struct obd_device,
 487                                               obd_kset.kobj);
 488
 489         return sprintf(buf, "%d\n", obd->u.cli.cl_checksum_dump ? 1 : 0);
 490 }
 491
 492 static ssize_t checksum_dump_store(struct kobject *kobj,
 493                                    struct attribute *attr,
 494                                    const char *buffer,
 495                                    size_t count)
 496 {
 497         struct obd_device *obd = container_of(kobj, struct obd_device,
 498                                               obd_kset.kobj);
 499         bool val;
 500         int rc;
 501
 502         rc = kstrtobool(buffer, &val);
 503         if (rc)
 504                 return rc;
 505
 506         obd->u.cli.cl_checksum_dump = val;
 507
 508         return count;
 509 }
 510 LUSTRE_RW_ATTR(checksum_dump);
 511
 512 static ssize_t contention_seconds_show(struct kobject *kobj,
 513                                        struct attribute *attr,
 514                                        char *buf)
 515 {
 516         struct obd_device *obd = container_of(kobj, struct obd_device,
 517                                               obd_kset.kobj);
 518         struct osc_device *od = obd2osc_dev(obd);
 519
 520         return sprintf(buf, "%lld\n", od->od_contention_time);
 521 }
 522
 523 static ssize_t contention_seconds_store(struct kobject *kobj,
 524                                         struct attribute *attr,
 525                                         const char *buffer,
 526                                         size_t count)
 527 {
 528         struct obd_device *obd = container_of(kobj, struct obd_device,
 529                                               obd_kset.kobj);
 530         struct osc_device *od = obd2osc_dev(obd);
 531         unsigned int val;
 532         int rc;
 533
 534         rc = kstrtouint(buffer, 0, &val);
 535         if (rc)
 536                 return rc;
 537
 538         od->od_contention_time = val;
 539
 540         return count;
 541 }
 542 LUSTRE_RW_ATTR(contention_seconds);
 543
 544 static ssize_t lockless_truncate_show(struct kobject *kobj,
 545                                       struct attribute *attr,
 546                                       char *buf)
 547 {
 548         struct obd_device *obd = container_of(kobj, struct obd_device,
 549                                               obd_kset.kobj);
 550         struct osc_device *od = obd2osc_dev(obd);
 551
 552         return sprintf(buf, "%u\n", od->od_lockless_truncate);
 553 }
 554
 555 static ssize_t lockless_truncate_store(struct kobject *kobj,
 556                                        struct attribute *attr,
 557                                        const char *buffer,
 558                                        size_t count)
 559 {
 560         struct obd_device *obd = container_of(kobj, struct obd_device,
 561                                               obd_kset.kobj);
 562         struct osc_device *od = obd2osc_dev(obd);
 563         bool val;
 564         int rc;
 565
 566         rc = kstrtobool(buffer, &val);
 567         if (rc)
 568                 return rc;
 569
 570         od->od_lockless_truncate = val;
 571
 572         return count;
 573 }
 574 LUSTRE_RW_ATTR(lockless_truncate);
 575
 576 static ssize_t destroys_in_flight_show(struct kobject *kobj,
 577                                        struct attribute *attr,
 578                                        char *buf)
 579 {
 580         struct obd_device *obd = container_of(kobj, struct obd_device,
 581                                               obd_kset.kobj);
 582
 583         return sprintf(buf, "%u\n",
 584                        atomic_read(&obd->u.cli.cl_destroy_in_flight));
 585 }
 586 LUSTRE_RO_ATTR(destroys_in_flight);
 587
 588 LPROC_SEQ_FOPS_RW_TYPE(osc, obd_max_pages_per_rpc);
 589
 590 LUSTRE_RW_ATTR(short_io_bytes);
 591
 592 #ifdef CONFIG_PROC_FS
 593 static int osc_unstable_stats_seq_show(struct seq_file *m, void *v)
 594 {
 595         struct obd_device *obd = m->private;
 596         struct client_obd *cli = &obd->u.cli;
 597         long pages;
 598         int mb;
 599
 600         pages = atomic_long_read(&cli->cl_unstable_count);
 601         mb    = (pages * PAGE_SIZE) >> 20;
 602
 603         seq_printf(m, "unstable_pages: %20ld\n"
 604                    "unstable_mb:              %10d\n",
 605                    pages, mb);
 606         return 0;
 607 }
 608 LPROC_SEQ_FOPS_RO(osc_unstable_stats);
 609
 610 static ssize_t idle_timeout_show(struct kobject *kobj, struct attribute *attr,
 611                                  char *buf)
 612 {
 613         struct obd_device *obd = container_of(kobj, struct obd_device,
 614                                               obd_kset.kobj);
 615         struct obd_import *imp;
 616         int ret;
 617
 618         with_imp_locked(obd, imp, ret)
 619                 ret = sprintf(buf, "%u\n", imp->imp_idle_timeout);
 620
 621         return ret;
 622 }
 623
 624 static ssize_t idle_timeout_store(struct kobject *kobj, struct attribute *attr,
 625                                   const char *buffer, size_t count)
 626 {
 627         struct obd_device *obd = container_of(kobj, struct obd_device,
 628                                               obd_kset.kobj);
 629         struct obd_import *imp;
 630         struct ptlrpc_request *req;
 631         unsigned int idle_debug = 0;
 632         unsigned int val;
 633         int rc;
 634
 635         if (strncmp(buffer, "debug", 5) == 0) {
 636                 idle_debug = D_CONSOLE;
 637         } else if (strncmp(buffer, "nodebug", 6) == 0) {
 638                 idle_debug = D_HA;
 639         } else {
 640                 rc = kstrtouint(buffer, 10, &val);
 641                 if (rc)
 642                         return rc;
 643
 644                 if (val > CONNECTION_SWITCH_MAX)
 645                         return -ERANGE;
 646         }
 647
 648         with_imp_locked(obd, imp, rc) {
 649                 if (idle_debug) {
 650                         imp->imp_idle_debug = idle_debug;
 651                 } else {
 652                         if (!val) {
 653                                 /* initiate the connection if it's in IDLE state */
 654                                 req = ptlrpc_request_alloc(imp,
 655                                                            &RQF_OST_STATFS);
 656                                 if (req != NULL)
 657                                         ptlrpc_req_finished(req);
 658                         }
 659                         imp->imp_idle_timeout = val;
 660                 }
 661         }
 662
 663         return count;
 664 }
 665 LUSTRE_RW_ATTR(idle_timeout);
 666
 667 static ssize_t idle_connect_store(struct kobject *kobj, struct attribute *attr,
 668                                   const char *buffer, size_t count)
 669 {
 670         struct obd_device *obd = container_of(kobj, struct obd_device,
 671                                               obd_kset.kobj);
 672         struct obd_import *imp;
 673         struct ptlrpc_request *req;
 674         int rc;
 675
 676         with_imp_locked(obd, imp, rc) {
 677                 /* to initiate the connection if it's in IDLE state */
 678                 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
 679                 if (req)
 680                         ptlrpc_req_finished(req);
 681                 ptlrpc_pinger_force(imp);
 682         }
 683
 684         return rc ?: count;
 685 }
 686 LUSTRE_WO_ATTR(idle_connect);
 687
 688 static ssize_t grant_shrink_show(struct kobject *kobj, struct attribute *attr,
 689                                  char *buf)
 690 {
 691         struct obd_device *obd = container_of(kobj, struct obd_device,
 692                                               obd_kset.kobj);
 693         struct obd_import *imp;
 694         ssize_t len;
 695
 696         with_imp_locked(obd, imp, len)
 697                 len = scnprintf(buf, PAGE_SIZE, "%d\n",
 698                                 !imp->imp_grant_shrink_disabled &&
 699                                 OCD_HAS_FLAG(&imp->imp_connect_data,
 700                                              GRANT_SHRINK));
 701
 702         return len;
 703 }
 704
 705 static ssize_t grant_shrink_store(struct kobject *kobj, struct attribute *attr,
 706                                   const char *buffer, size_t count)
 707 {
 708         struct obd_device *obd = container_of(kobj, struct obd_device,
 709                                               obd_kset.kobj);
 710         struct obd_import *imp;
 711         bool val;
 712         int rc;
 713
 714         if (obd == NULL)
 715                 return 0;
 716
 717         rc = kstrtobool(buffer, &val);
 718         if (rc)
 719                 return rc;
 720
 721         with_imp_locked(obd, imp, rc) {
 722                 spin_lock(&imp->imp_lock);
 723                 imp->imp_grant_shrink_disabled = !val;
 724                 spin_unlock(&imp->imp_lock);
 725         }
 726
 727         return rc ?: count;
 728 }
 729 LUSTRE_RW_ATTR(grant_shrink);
 730
 731 LPROC_SEQ_FOPS_RO_TYPE(osc, connect_flags);
 732 LPROC_SEQ_FOPS_RO_TYPE(osc, server_uuid);
 733 LPROC_SEQ_FOPS_RO_TYPE(osc, timeouts);
 734 LPROC_SEQ_FOPS_RO_TYPE(osc, state);
 735
 736 LPROC_SEQ_FOPS_RW_TYPE(osc, import);
 737 LPROC_SEQ_FOPS_RW_TYPE(osc, pinger_recov);
 738
 739 struct lprocfs_vars lprocfs_osc_obd_vars[] = {
 740         { .name =       "connect_flags",
 741           .fops =       &osc_connect_flags_fops         },
 742         { .name =       "ost_server_uuid",
 743           .fops =       &osc_server_uuid_fops           },
 744         { .name =       "max_pages_per_rpc",
 745           .fops =       &osc_obd_max_pages_per_rpc_fops },
 746         { .name =       "osc_cached_mb",
 747           .fops =       &osc_cached_mb_fops             },
 748         { .name =       "cur_grant_bytes",
 749           .fops =       &osc_cur_grant_bytes_fops       },
 750         { .name =       "checksum_type",
 751           .fops =       &osc_checksum_type_fops         },
 752         { .name =       "timeouts",
 753           .fops =       &osc_timeouts_fops              },
 754         { .name =       "import",
 755           .fops =       &osc_import_fops                },
 756         { .name =       "state",
 757           .fops =       &osc_state_fops                 },
 758         { .name =       "pinger_recov",
 759           .fops =       &osc_pinger_recov_fops          },
 760         { .name =       "unstable_stats",
 761           .fops =       &osc_unstable_stats_fops        },
 762         { NULL }
 763 };
 764
 765 static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 766 {
 767         struct timespec64 now;
 768         struct obd_device *obd = seq->private;
 769         struct client_obd *cli = &obd->u.cli;
 770         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 771         int i;
 772
 773         ktime_get_real_ts64(&now);
 774
 775         spin_lock(&cli->cl_loi_list_lock);
 776
 777         seq_printf(seq, "snapshot_time:         %lld.%09lu (secs.nsecs)\n",
 778                    (s64)now.tv_sec, now.tv_nsec);
 779         seq_printf(seq, "read RPCs in flight:  %d\n",
 780                    cli->cl_r_in_flight);
 781         seq_printf(seq, "write RPCs in flight: %d\n",
 782                    cli->cl_w_in_flight);
 783         seq_printf(seq, "pending write pages:  %d\n",
 784                    atomic_read(&cli->cl_pending_w_pages));
 785         seq_printf(seq, "pending read pages:   %d\n",
 786                    atomic_read(&cli->cl_pending_r_pages));
 787
 788         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 789         seq_printf(seq, "pages per rpc         rpcs   %% cum %% |");
 790         seq_printf(seq, "       rpcs   %% cum %%\n");
 791
 792         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 793         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 794
 795         read_cum = 0;
 796         write_cum = 0;
 797         for (i = 0; i < OBD_HIST_MAX; i++) {
 798                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 799                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 800
 801                 read_cum += r;
 802                 write_cum += w;
 803                 seq_printf(seq, "%d:\t\t%10lu %3u %3u   | %10lu %3u %3u\n",
 804                            1 << i, r, pct(r, read_tot),
 805                            pct(read_cum, read_tot), w,
 806                            pct(w, write_tot),
 807                            pct(write_cum, write_tot));
 808                 if (read_cum == read_tot && write_cum == write_tot)
 809                         break;
 810         }
 811
 812         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 813         seq_printf(seq, "rpcs in flight        rpcs   %% cum %% |");
 814         seq_printf(seq, "       rpcs   %% cum %%\n");
 815
 816         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 817         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
 818
 819         read_cum = 0;
 820         write_cum = 0;
 821         for (i = 0; i < OBD_HIST_MAX; i++) {
 822                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
 823                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
 824                 read_cum += r;
 825                 write_cum += w;
 826                 seq_printf(seq, "%d:\t\t%10lu %3u %3u   | %10lu %3u %3u\n",
 827                            i, r, pct(r, read_tot),
 828                            pct(read_cum, read_tot), w,
 829                            pct(w, write_tot),
 830                            pct(write_cum, write_tot));
 831                 if (read_cum == read_tot && write_cum == write_tot)
 832                         break;
 833         }
 834
 835         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 836         seq_printf(seq, "offset                rpcs   %% cum %% |");
 837         seq_printf(seq, "       rpcs   %% cum %%\n");
 838
 839         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
 840         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist);
 841
 842         read_cum = 0;
 843         write_cum = 0;
 844         for (i = 0; i < OBD_HIST_MAX; i++) {
 845                 unsigned long r = cli->cl_read_offset_hist.oh_buckets[i];
 846                 unsigned long w = cli->cl_write_offset_hist.oh_buckets[i];
 847                 read_cum += r;
 848                 write_cum += w;
 849                 seq_printf(seq, "%d:\t\t%10lu %3u %3u   | %10lu %3u %3u\n",
 850                            (i == 0) ? 0 : 1 << (i - 1),
 851                            r, pct(r, read_tot), pct(read_cum, read_tot),
 852                            w, pct(w, write_tot), pct(write_cum, write_tot));
 853                 if (read_cum == read_tot && write_cum == write_tot)
 854                         break;
 855         }
 856
 857         spin_unlock(&cli->cl_loi_list_lock);
 858
 859         return 0;
 860 }
 861
 862 static ssize_t osc_rpc_stats_seq_write(struct file *file,
 863                                        const char __user *buf,
 864                                        size_t len, loff_t *off)
 865 {
 866         struct seq_file *seq = file->private_data;
 867         struct obd_device *obd = seq->private;
 868         struct client_obd *cli = &obd->u.cli;
 869
 870         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 871         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 872         lprocfs_oh_clear(&cli->cl_read_page_hist);
 873         lprocfs_oh_clear(&cli->cl_write_page_hist);
 874         lprocfs_oh_clear(&cli->cl_read_offset_hist);
 875         lprocfs_oh_clear(&cli->cl_write_offset_hist);
 876
 877         return len;
 878 }
 879 LPROC_SEQ_FOPS(osc_rpc_stats);
 880
 881 static int osc_stats_seq_show(struct seq_file *seq, void *v)
 882 {
 883         struct timespec64 now;
 884         struct obd_device *obd = seq->private;
 885         struct osc_stats *stats = &obd2osc_dev(obd)->od_stats;
 886
 887         ktime_get_real_ts64(&now);
 888
 889         seq_printf(seq, "snapshot_time:         %lld.%09lu (secs.nsecs)\n",
 890                    (s64)now.tv_sec, now.tv_nsec);
 891         seq_printf(seq, "lockless_write_bytes\t\t%llu\n",
 892                    stats->os_lockless_writes);
 893         seq_printf(seq, "lockless_read_bytes\t\t%llu\n",
 894                    stats->os_lockless_reads);
 895         seq_printf(seq, "lockless_truncate\t\t%llu\n",
 896                    stats->os_lockless_truncates);
 897         return 0;
 898 }
 899
 900 static ssize_t osc_stats_seq_write(struct file *file,
 901                                    const char __user *buf,
 902                                    size_t len, loff_t *off)
 903 {
 904         struct seq_file *seq = file->private_data;
 905         struct obd_device *obd = seq->private;
 906         struct osc_stats *stats = &obd2osc_dev(obd)->od_stats;
 907
 908         memset(stats, 0, sizeof(*stats));
 909         return len;
 910 }
 911
 912 LPROC_SEQ_FOPS(osc_stats);
 913
 914 int lprocfs_osc_attach_seqstat(struct obd_device *obd)
 915 {
 916         int rc;
 917
 918         rc = lprocfs_seq_create(obd->obd_proc_entry, "osc_stats", 0644,
 919                                 &osc_stats_fops, obd);
 920         if (rc == 0)
 921                 rc = lprocfs_obd_seq_create(obd, "rpc_stats", 0644,
 922                                             &osc_rpc_stats_fops, obd);
 923
 924         return rc;
 925 }
 926 #endif /* CONFIG_PROC_FS */
 927
 928 static struct attribute *osc_attrs[] = {
 929         &lustre_attr_active.attr,
 930         &lustre_attr_checksums.attr,
 931         &lustre_attr_checksum_dump.attr,
 932         &lustre_attr_contention_seconds.attr,
 933         &lustre_attr_cur_dirty_bytes.attr,
 934         &lustre_attr_cur_lost_grant_bytes.attr,
 935         &lustre_attr_cur_dirty_grant_bytes.attr,
 936         &lustre_attr_destroys_in_flight.attr,
 937         &lustre_attr_grant_shrink_interval.attr,
 938         &lustre_attr_lockless_truncate.attr,
 939         &lustre_attr_max_dirty_mb.attr,
 940         &lustre_attr_max_rpcs_in_flight.attr,
 941         &lustre_attr_short_io_bytes.attr,
 942         &lustre_attr_resend_count.attr,
 943         &lustre_attr_ost_conn_uuid.attr,
 944         &lustre_attr_conn_uuid.attr,
 945         &lustre_attr_ping.attr,
 946         &lustre_attr_idle_timeout.attr,
 947         &lustre_attr_idle_connect.attr,
 948         &lustre_attr_grant_shrink.attr,
 949         NULL,
 950 };
 951
 952 int osc_tunables_init(struct obd_device *obd)
 953 {
 954         int rc;
 955
 956         obd->obd_vars = lprocfs_osc_obd_vars;
 957         obd->obd_ktype.default_attrs = osc_attrs;
 958         rc = lprocfs_obd_setup(obd, false);
 959         if (rc)
 960                 return rc;
 961 #ifdef CONFIG_PROC_FS
 962         /* If the basic OSC proc tree construction succeeded then
 963          * lets do the rest.
 964          */
 965         rc = lprocfs_osc_attach_seqstat(obd);
 966         if (rc)
 967                 goto obd_cleanup;
 968
 969 #endif /* CONFIG_PROC_FS */
 970         rc = sptlrpc_lprocfs_cliobd_attach(obd);
 971         if (rc)
 972                 goto obd_cleanup;
 973
 974         ptlrpc_lprocfs_register_obd(obd);
 975 obd_cleanup:
 976         if (rc)
 977                 lprocfs_obd_cleanup(obd);
 978         return rc;
 979 }