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 scnprintf(buf, PAGE_SIZE, "%d\n", !!obd->u.cli.cl_checksum);
 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 DECLARE_CKSUM_NAME;
 392
 393 static int osc_checksum_type_seq_show(struct seq_file *m, void *v)
 394 {
 395         struct obd_device *obd = m->private;
 396         int i;
 397
 398         if (obd == NULL)
 399                 return 0;
 400
 401         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 402                 if ((BIT(i) & obd->u.cli.cl_supp_cksum_types) == 0)
 403                         continue;
 404                 if (obd->u.cli.cl_cksum_type == BIT(i))
 405                         seq_printf(m, "[%s] ", cksum_name[i]);
 406                 else
 407                         seq_printf(m, "%s ", cksum_name[i]);
 408         }
 409         seq_puts(m, "\n");
 410
 411         return 0;
 412 }
 413
 414 static ssize_t osc_checksum_type_seq_write(struct file *file,
 415                                            const char __user *buffer,
 416                                            size_t count, loff_t *off)
 417 {
 418         struct seq_file *m = file->private_data;
 419         struct obd_device *obd = m->private;
 420         char kernbuf[10];
 421         int rc = -EINVAL;
 422         int i;
 423
 424         if (obd == NULL)
 425                 return 0;
 426
 427         if (count > sizeof(kernbuf) - 1)
 428                 return -EINVAL;
 429         if (copy_from_user(kernbuf, buffer, count))
 430                 return -EFAULT;
 431
 432         if (count > 0 && kernbuf[count - 1] == '\n')
 433                 kernbuf[count - 1] = '\0';
 434         else
 435                 kernbuf[count] = '\0';
 436
 437         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 438                 if (strcmp(kernbuf, cksum_name[i]) == 0) {
 439                         obd->u.cli.cl_preferred_cksum_type = BIT(i);
 440                         if (obd->u.cli.cl_supp_cksum_types & BIT(i)) {
 441                                 obd->u.cli.cl_cksum_type = BIT(i);
 442                                 rc = count;
 443                         } else {
 444                                 rc = -ENOTSUPP;
 445                         }
 446                         break;
 447                 }
 448         }
 449         return rc;
 450 }
 451 LPROC_SEQ_FOPS(osc_checksum_type);
 452
 453 static ssize_t resend_count_show(struct kobject *kobj,
 454                                  struct attribute *attr,
 455                                  char *buf)
 456 {
 457         struct obd_device *obd = container_of(kobj, struct obd_device,
 458                                               obd_kset.kobj);
 459
 460         return sprintf(buf, "%u\n", atomic_read(&obd->u.cli.cl_resends));
 461 }
 462
 463 static ssize_t resend_count_store(struct kobject *kobj,
 464                                   struct attribute *attr,
 465                                   const char *buffer,
 466                                   size_t count)
 467 {
 468         struct obd_device *obd = container_of(kobj, struct obd_device,
 469                                               obd_kset.kobj);
 470         unsigned int val;
 471         int rc;
 472
 473         rc = kstrtouint(buffer, 10, &val);
 474         if (rc)
 475                 return rc;
 476
 477         atomic_set(&obd->u.cli.cl_resends, val);
 478
 479         return count;
 480 }
 481 LUSTRE_RW_ATTR(resend_count);
 482
 483 static ssize_t checksum_dump_show(struct kobject *kobj,
 484                                   struct attribute *attr,
 485                                   char *buf)
 486 {
 487         struct obd_device *obd = container_of(kobj, struct obd_device,
 488                                               obd_kset.kobj);
 489
 490         return scnprintf(buf, PAGE_SIZE, "%d\n", !!obd->u.cli.cl_checksum_dump);
 491 }
 492
 493 static ssize_t checksum_dump_store(struct kobject *kobj,
 494                                    struct attribute *attr,
 495                                    const char *buffer,
 496                                    size_t count)
 497 {
 498         struct obd_device *obd = container_of(kobj, struct obd_device,
 499                                               obd_kset.kobj);
 500         bool val;
 501         int rc;
 502
 503         rc = kstrtobool(buffer, &val);
 504         if (rc)
 505                 return rc;
 506
 507         obd->u.cli.cl_checksum_dump = val;
 508
 509         return count;
 510 }
 511 LUSTRE_RW_ATTR(checksum_dump);
 512
 513 static ssize_t contention_seconds_show(struct kobject *kobj,
 514                                        struct attribute *attr,
 515                                        char *buf)
 516 {
 517         struct obd_device *obd = container_of(kobj, struct obd_device,
 518                                               obd_kset.kobj);
 519         struct osc_device *od = obd2osc_dev(obd);
 520
 521         return sprintf(buf, "%lld\n", od->od_contention_time);
 522 }
 523
 524 static ssize_t contention_seconds_store(struct kobject *kobj,
 525                                         struct attribute *attr,
 526                                         const char *buffer,
 527                                         size_t count)
 528 {
 529         struct obd_device *obd = container_of(kobj, struct obd_device,
 530                                               obd_kset.kobj);
 531         struct osc_device *od = obd2osc_dev(obd);
 532         unsigned int val;
 533         int rc;
 534
 535         rc = kstrtouint(buffer, 0, &val);
 536         if (rc)
 537                 return rc;
 538
 539         od->od_contention_time = val;
 540
 541         return count;
 542 }
 543 LUSTRE_RW_ATTR(contention_seconds);
 544
 545 static ssize_t lockless_truncate_show(struct kobject *kobj,
 546                                       struct attribute *attr,
 547                                       char *buf)
 548 {
 549         struct obd_device *obd = container_of(kobj, struct obd_device,
 550                                               obd_kset.kobj);
 551         struct osc_device *od = obd2osc_dev(obd);
 552
 553         return sprintf(buf, "%u\n", od->od_lockless_truncate);
 554 }
 555
 556 static ssize_t lockless_truncate_store(struct kobject *kobj,
 557                                        struct attribute *attr,
 558                                        const char *buffer,
 559                                        size_t count)
 560 {
 561         struct obd_device *obd = container_of(kobj, struct obd_device,
 562                                               obd_kset.kobj);
 563         struct osc_device *od = obd2osc_dev(obd);
 564         bool val;
 565         int rc;
 566
 567         rc = kstrtobool(buffer, &val);
 568         if (rc)
 569                 return rc;
 570
 571         od->od_lockless_truncate = val;
 572
 573         return count;
 574 }
 575 LUSTRE_RW_ATTR(lockless_truncate);
 576
 577 static ssize_t destroys_in_flight_show(struct kobject *kobj,
 578                                        struct attribute *attr,
 579                                        char *buf)
 580 {
 581         struct obd_device *obd = container_of(kobj, struct obd_device,
 582                                               obd_kset.kobj);
 583
 584         return sprintf(buf, "%u\n",
 585                        atomic_read(&obd->u.cli.cl_destroy_in_flight));
 586 }
 587 LUSTRE_RO_ATTR(destroys_in_flight);
 588
 589 LPROC_SEQ_FOPS_RW_TYPE(osc, obd_max_pages_per_rpc);
 590
 591 LUSTRE_RW_ATTR(short_io_bytes);
 592
 593 #ifdef CONFIG_PROC_FS
 594 static int osc_unstable_stats_seq_show(struct seq_file *m, void *v)
 595 {
 596         struct obd_device *obd = m->private;
 597         struct client_obd *cli = &obd->u.cli;
 598         long pages;
 599         int mb;
 600
 601         pages = atomic_long_read(&cli->cl_unstable_count);
 602         mb    = (pages * PAGE_SIZE) >> 20;
 603
 604         seq_printf(m, "unstable_pages: %20ld\n"
 605                    "unstable_mb:              %10d\n",
 606                    pages, mb);
 607         return 0;
 608 }
 609 LPROC_SEQ_FOPS_RO(osc_unstable_stats);
 610
 611 static ssize_t idle_timeout_show(struct kobject *kobj, struct attribute *attr,
 612                                  char *buf)
 613 {
 614         struct obd_device *obd = container_of(kobj, struct obd_device,
 615                                               obd_kset.kobj);
 616         struct obd_import *imp;
 617         int ret;
 618
 619         with_imp_locked(obd, imp, ret)
 620                 ret = sprintf(buf, "%u\n", imp->imp_idle_timeout);
 621
 622         return ret;
 623 }
 624
 625 static ssize_t idle_timeout_store(struct kobject *kobj, struct attribute *attr,
 626                                   const char *buffer, size_t count)
 627 {
 628         struct obd_device *obd = container_of(kobj, struct obd_device,
 629                                               obd_kset.kobj);
 630         struct obd_import *imp;
 631         struct ptlrpc_request *req;
 632         unsigned int idle_debug = 0;
 633         unsigned int val;
 634         int rc;
 635
 636         if (strncmp(buffer, "debug", 5) == 0) {
 637                 idle_debug = D_CONSOLE;
 638         } else if (strncmp(buffer, "nodebug", 6) == 0) {
 639                 idle_debug = D_HA;
 640         } else {
 641                 rc = kstrtouint(buffer, 10, &val);
 642                 if (rc)
 643                         return rc;
 644
 645                 if (val > CONNECTION_SWITCH_MAX)
 646                         return -ERANGE;
 647         }
 648
 649         with_imp_locked(obd, imp, rc) {
 650                 if (idle_debug) {
 651                         imp->imp_idle_debug = idle_debug;
 652                 } else {
 653                         if (!val) {
 654                                 /* initiate the connection if it's in IDLE state */
 655                                 req = ptlrpc_request_alloc(imp,
 656                                                            &RQF_OST_STATFS);
 657                                 if (req != NULL)
 658                                         ptlrpc_req_finished(req);
 659                         }
 660                         imp->imp_idle_timeout = val;
 661                 }
 662         }
 663
 664         return count;
 665 }
 666 LUSTRE_RW_ATTR(idle_timeout);
 667
 668 static ssize_t idle_connect_store(struct kobject *kobj, struct attribute *attr,
 669                                   const char *buffer, size_t count)
 670 {
 671         struct obd_device *obd = container_of(kobj, struct obd_device,
 672                                               obd_kset.kobj);
 673         struct obd_import *imp;
 674         struct ptlrpc_request *req;
 675         int rc;
 676
 677         with_imp_locked(obd, imp, rc) {
 678                 /* to initiate the connection if it's in IDLE state */
 679                 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
 680                 if (req)
 681                         ptlrpc_req_finished(req);
 682                 ptlrpc_pinger_force(imp);
 683         }
 684
 685         return rc ?: count;
 686 }
 687 LUSTRE_WO_ATTR(idle_connect);
 688
 689 static ssize_t grant_shrink_show(struct kobject *kobj, struct attribute *attr,
 690                                  char *buf)
 691 {
 692         struct obd_device *obd = container_of(kobj, struct obd_device,
 693                                               obd_kset.kobj);
 694         struct obd_import *imp;
 695         ssize_t len;
 696
 697         with_imp_locked(obd, imp, len)
 698                 len = scnprintf(buf, PAGE_SIZE, "%d\n",
 699                                 !imp->imp_grant_shrink_disabled &&
 700                                 OCD_HAS_FLAG(&imp->imp_connect_data,
 701                                              GRANT_SHRINK));
 702
 703         return len;
 704 }
 705
 706 static ssize_t grant_shrink_store(struct kobject *kobj, struct attribute *attr,
 707                                   const char *buffer, size_t count)
 708 {
 709         struct obd_device *obd = container_of(kobj, struct obd_device,
 710                                               obd_kset.kobj);
 711         struct obd_import *imp;
 712         bool val;
 713         int rc;
 714
 715         if (obd == NULL)
 716                 return 0;
 717
 718         rc = kstrtobool(buffer, &val);
 719         if (rc)
 720                 return rc;
 721
 722         with_imp_locked(obd, imp, rc) {
 723                 spin_lock(&imp->imp_lock);
 724                 imp->imp_grant_shrink_disabled = !val;
 725                 spin_unlock(&imp->imp_lock);
 726         }
 727
 728         return rc ?: count;
 729 }
 730 LUSTRE_RW_ATTR(grant_shrink);
 731
 732 LPROC_SEQ_FOPS_RO_TYPE(osc, connect_flags);
 733 LPROC_SEQ_FOPS_RO_TYPE(osc, server_uuid);
 734 LPROC_SEQ_FOPS_RO_TYPE(osc, timeouts);
 735 LPROC_SEQ_FOPS_RO_TYPE(osc, state);
 736
 737 LPROC_SEQ_FOPS_RW_TYPE(osc, import);
 738 LPROC_SEQ_FOPS_RW_TYPE(osc, pinger_recov);
 739
 740 struct lprocfs_vars lprocfs_osc_obd_vars[] = {
 741         { .name =       "connect_flags",
 742           .fops =       &osc_connect_flags_fops         },
 743         { .name =       "ost_server_uuid",
 744           .fops =       &osc_server_uuid_fops           },
 745         { .name =       "max_pages_per_rpc",
 746           .fops =       &osc_obd_max_pages_per_rpc_fops },
 747         { .name =       "osc_cached_mb",
 748           .fops =       &osc_cached_mb_fops             },
 749         { .name =       "cur_grant_bytes",
 750           .fops =       &osc_cur_grant_bytes_fops       },
 751         { .name =       "checksum_type",
 752           .fops =       &osc_checksum_type_fops         },
 753         { .name =       "timeouts",
 754           .fops =       &osc_timeouts_fops              },
 755         { .name =       "import",
 756           .fops =       &osc_import_fops                },
 757         { .name =       "state",
 758           .fops =       &osc_state_fops                 },
 759         { .name =       "pinger_recov",
 760           .fops =       &osc_pinger_recov_fops          },
 761         { .name =       "unstable_stats",
 762           .fops =       &osc_unstable_stats_fops        },
 763         { NULL }
 764 };
 765
 766 static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 767 {
 768         struct timespec64 now;
 769         struct obd_device *obd = seq->private;
 770         struct client_obd *cli = &obd->u.cli;
 771         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 772         int i;
 773
 774         ktime_get_real_ts64(&now);
 775
 776         spin_lock(&cli->cl_loi_list_lock);
 777
 778         seq_printf(seq, "snapshot_time:         %lld.%09lu (secs.nsecs)\n",
 779                    (s64)now.tv_sec, now.tv_nsec);
 780         seq_printf(seq, "read RPCs in flight:  %d\n",
 781                    cli->cl_r_in_flight);
 782         seq_printf(seq, "write RPCs in flight: %d\n",
 783                    cli->cl_w_in_flight);
 784         seq_printf(seq, "pending write pages:  %d\n",
 785                    atomic_read(&cli->cl_pending_w_pages));
 786         seq_printf(seq, "pending read pages:   %d\n",
 787                    atomic_read(&cli->cl_pending_r_pages));
 788
 789         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 790         seq_printf(seq, "pages per rpc         rpcs   %% cum %% |");
 791         seq_printf(seq, "       rpcs   %% cum %%\n");
 792
 793         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 794         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 795
 796         read_cum = 0;
 797         write_cum = 0;
 798         for (i = 0; i < OBD_HIST_MAX; i++) {
 799                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 800                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 801
 802                 read_cum += r;
 803                 write_cum += w;
 804                 seq_printf(seq, "%d:\t\t%10lu %3u %3u   | %10lu %3u %3u\n",
 805                            1 << i, r, pct(r, read_tot),
 806                            pct(read_cum, read_tot), w,
 807                            pct(w, write_tot),
 808                            pct(write_cum, write_tot));
 809                 if (read_cum == read_tot && write_cum == write_tot)
 810                         break;
 811         }
 812
 813         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 814         seq_printf(seq, "rpcs in flight        rpcs   %% cum %% |");
 815         seq_printf(seq, "       rpcs   %% cum %%\n");
 816
 817         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 818         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
 819
 820         read_cum = 0;
 821         write_cum = 0;
 822         for (i = 1; i < OBD_HIST_MAX; i++) {
 823                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
 824                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
 825                 read_cum += r;
 826                 write_cum += w;
 827                 seq_printf(seq, "%d:\t\t%10lu %3u %3u   | %10lu %3u %3u\n",
 828                            i, r, pct(r, read_tot),
 829                            pct(read_cum, read_tot), w,
 830                            pct(w, write_tot),
 831                            pct(write_cum, write_tot));
 832                 if (read_cum == read_tot && write_cum == write_tot)
 833                         break;
 834         }
 835
 836         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 837         seq_printf(seq, "offset                rpcs   %% cum %% |");
 838         seq_printf(seq, "       rpcs   %% cum %%\n");
 839
 840         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
 841         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist);
 842
 843         read_cum = 0;
 844         write_cum = 0;
 845         for (i = 0; i < OBD_HIST_MAX; i++) {
 846                 unsigned long r = cli->cl_read_offset_hist.oh_buckets[i];
 847                 unsigned long w = cli->cl_write_offset_hist.oh_buckets[i];
 848                 read_cum += r;
 849                 write_cum += w;
 850                 seq_printf(seq, "%d:\t\t%10lu %3u %3u   | %10lu %3u %3u\n",
 851                            (i == 0) ? 0 : 1 << (i - 1),
 852                            r, pct(r, read_tot), pct(read_cum, read_tot),
 853                            w, pct(w, write_tot), pct(write_cum, write_tot));
 854                 if (read_cum == read_tot && write_cum == write_tot)
 855                         break;
 856         }
 857
 858         spin_unlock(&cli->cl_loi_list_lock);
 859
 860         return 0;
 861 }
 862
 863 static ssize_t osc_rpc_stats_seq_write(struct file *file,
 864                                        const char __user *buf,
 865                                        size_t len, loff_t *off)
 866 {
 867         struct seq_file *seq = file->private_data;
 868         struct obd_device *obd = seq->private;
 869         struct client_obd *cli = &obd->u.cli;
 870
 871         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 872         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 873         lprocfs_oh_clear(&cli->cl_read_page_hist);
 874         lprocfs_oh_clear(&cli->cl_write_page_hist);
 875         lprocfs_oh_clear(&cli->cl_read_offset_hist);
 876         lprocfs_oh_clear(&cli->cl_write_offset_hist);
 877
 878         return len;
 879 }
 880 LPROC_SEQ_FOPS(osc_rpc_stats);
 881
 882 static int osc_stats_seq_show(struct seq_file *seq, void *v)
 883 {
 884         struct timespec64 now;
 885         struct obd_device *obd = seq->private;
 886         struct osc_stats *stats = &obd2osc_dev(obd)->od_stats;
 887
 888         ktime_get_real_ts64(&now);
 889
 890         seq_printf(seq, "snapshot_time:         %lld.%09lu (secs.nsecs)\n",
 891                    (s64)now.tv_sec, now.tv_nsec);
 892         seq_printf(seq, "lockless_write_bytes\t\t%llu\n",
 893                    stats->os_lockless_writes);
 894         seq_printf(seq, "lockless_read_bytes\t\t%llu\n",
 895                    stats->os_lockless_reads);
 896         seq_printf(seq, "lockless_truncate\t\t%llu\n",
 897                    stats->os_lockless_truncates);
 898         return 0;
 899 }
 900
 901 static ssize_t osc_stats_seq_write(struct file *file,
 902                                    const char __user *buf,
 903                                    size_t len, loff_t *off)
 904 {
 905         struct seq_file *seq = file->private_data;
 906         struct obd_device *obd = seq->private;
 907         struct osc_stats *stats = &obd2osc_dev(obd)->od_stats;
 908
 909         memset(stats, 0, sizeof(*stats));
 910         return len;
 911 }
 912
 913 LPROC_SEQ_FOPS(osc_stats);
 914
 915 int lprocfs_osc_attach_seqstat(struct obd_device *obd)
 916 {
 917         int rc;
 918
 919         rc = lprocfs_seq_create(obd->obd_proc_entry, "osc_stats", 0644,
 920                                 &osc_stats_fops, obd);
 921         if (rc == 0)
 922                 rc = lprocfs_obd_seq_create(obd, "rpc_stats", 0644,
 923                                             &osc_rpc_stats_fops, obd);
 924
 925         return rc;
 926 }
 927 #endif /* CONFIG_PROC_FS */
 928
 929 static struct attribute *osc_attrs[] = {
 930         &lustre_attr_active.attr,
 931         &lustre_attr_checksums.attr,
 932         &lustre_attr_checksum_dump.attr,
 933         &lustre_attr_contention_seconds.attr,
 934         &lustre_attr_cur_dirty_bytes.attr,
 935         &lustre_attr_cur_lost_grant_bytes.attr,
 936         &lustre_attr_cur_dirty_grant_bytes.attr,
 937         &lustre_attr_destroys_in_flight.attr,
 938         &lustre_attr_grant_shrink_interval.attr,
 939         &lustre_attr_lockless_truncate.attr,
 940         &lustre_attr_max_dirty_mb.attr,
 941         &lustre_attr_max_rpcs_in_flight.attr,
 942         &lustre_attr_short_io_bytes.attr,
 943         &lustre_attr_resend_count.attr,
 944         &lustre_attr_ost_conn_uuid.attr,
 945         &lustre_attr_conn_uuid.attr,
 946         &lustre_attr_ping.attr,
 947         &lustre_attr_idle_timeout.attr,
 948         &lustre_attr_idle_connect.attr,
 949         &lustre_attr_grant_shrink.attr,
 950         NULL,
 951 };
 952
 953 int osc_tunables_init(struct obd_device *obd)
 954 {
 955         int rc;
 956
 957         obd->obd_vars = lprocfs_osc_obd_vars;
 958         obd->obd_ktype.default_attrs = osc_attrs;
 959         rc = lprocfs_obd_setup(obd, false);
 960         if (rc)
 961                 return rc;
 962 #ifdef CONFIG_PROC_FS
 963         /* If the basic OSC proc tree construction succeeded then
 964          * lets do the rest.
 965          */
 966         rc = lprocfs_osc_attach_seqstat(obd);
 967         if (rc)
 968                 goto obd_cleanup;
 969
 970 #endif /* CONFIG_PROC_FS */
 971         rc = sptlrpc_lprocfs_cliobd_attach(obd);
 972         if (rc)
 973                 goto obd_cleanup;
 974
 975         ptlrpc_lprocfs_register_obd(obd);
 976 obd_cleanup:
 977         if (rc)
 978                 lprocfs_obd_cleanup(obd);
 979         return rc;
 980 }