drivers/staging/lustre/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.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2015, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36 #define DEBUG_SUBSYSTEM S_CLASS
  37
  38 #include <linux/statfs.h>
  39 #include "../include/obd_cksum.h"
  40 #include "../include/obd_class.h"
  41 #include "../include/lprocfs_status.h"
  42 #include <linux/seq_file.h>
  43 #include "osc_internal.h"
  44
  45 static ssize_t active_show(struct kobject *kobj, struct attribute *attr,
  46                            char *buf)
  47 {
  48         struct obd_device *dev = container_of(kobj, struct obd_device,
  49                                               obd_kobj);
  50
  51         return sprintf(buf, "%d\n", !dev->u.cli.cl_import->imp_deactive);
  52 }
  53
  54 static ssize_t active_store(struct kobject *kobj, struct attribute *attr,
  55                             const char *buffer,
  56                             size_t count)
  57 {
  58         struct obd_device *dev = container_of(kobj, struct obd_device,
  59                                               obd_kobj);
  60         int rc;
  61         unsigned long val;
  62
  63         rc = kstrtoul(buffer, 10, &val);
  64         if (rc)
  65                 return rc;
  66         if (val > 1)
  67                 return -ERANGE;
  68
  69         /* opposite senses */
  70         if (dev->u.cli.cl_import->imp_deactive == val)
  71                 rc = ptlrpc_set_import_active(dev->u.cli.cl_import, val);
  72         else
  73                 CDEBUG(D_CONFIG, "activate %ld: ignoring repeat request\n",
  74                        val);
  75
  76         return count;
  77 }
  78 LUSTRE_RW_ATTR(active);
  79
  80 static ssize_t max_rpcs_in_flight_show(struct kobject *kobj,
  81                                        struct attribute *attr,
  82                                        char *buf)
  83 {
  84         struct obd_device *dev = container_of(kobj, struct obd_device,
  85                                               obd_kobj);
  86         struct client_obd *cli = &dev->u.cli;
  87
  88         return sprintf(buf, "%u\n", cli->cl_max_rpcs_in_flight);
  89 }
  90
  91 static ssize_t max_rpcs_in_flight_store(struct kobject *kobj,
  92                                         struct attribute *attr,
  93                                         const char *buffer,
  94                                         size_t count)
  95 {
  96         struct obd_device *dev = container_of(kobj, struct obd_device,
  97                                               obd_kobj);
  98         struct client_obd *cli = &dev->u.cli;
  99         int rc;
 100         unsigned long val;
 101         int adding, added, req_count;
 102
 103         rc = kstrtoul(buffer, 10, &val);
 104         if (rc)
 105                 return rc;
 106
 107         if (val < 1 || val > OSC_MAX_RIF_MAX)
 108                 return -ERANGE;
 109
 110         adding = val - cli->cl_max_rpcs_in_flight;
 111         req_count = atomic_read(&osc_pool_req_count);
 112         if (adding > 0 && req_count < osc_reqpool_maxreqcount) {
 113                 /*
 114                  * There might be some race which will cause over-limit
 115                  * allocation, but it is fine.
 116                  */
 117                 if (req_count + adding > osc_reqpool_maxreqcount)
 118                         adding = osc_reqpool_maxreqcount - req_count;
 119
 120                 added = osc_rq_pool->prp_populate(osc_rq_pool, adding);
 121                 atomic_add(added, &osc_pool_req_count);
 122         }
 123
 124         client_obd_list_lock(&cli->cl_loi_list_lock);
 125         cli->cl_max_rpcs_in_flight = val;
 126         client_obd_list_unlock(&cli->cl_loi_list_lock);
 127
 128         return count;
 129 }
 130 LUSTRE_RW_ATTR(max_rpcs_in_flight);
 131
 132 static ssize_t max_dirty_mb_show(struct kobject *kobj,
 133                                  struct attribute *attr,
 134                                  char *buf)
 135 {
 136         struct obd_device *dev = container_of(kobj, struct obd_device,
 137                                               obd_kobj);
 138         struct client_obd *cli = &dev->u.cli;
 139         long val;
 140         int mult;
 141
 142         client_obd_list_lock(&cli->cl_loi_list_lock);
 143         val = cli->cl_dirty_max;
 144         client_obd_list_unlock(&cli->cl_loi_list_lock);
 145
 146         mult = 1 << 20;
 147         return lprocfs_read_frac_helper(buf, PAGE_SIZE, val, mult);
 148 }
 149
 150 static ssize_t max_dirty_mb_store(struct kobject *kobj,
 151                                   struct attribute *attr,
 152                                   const char *buffer,
 153                                   size_t count)
 154 {
 155         struct obd_device *dev = container_of(kobj, struct obd_device,
 156                                               obd_kobj);
 157         struct client_obd *cli = &dev->u.cli;
 158         int rc;
 159         unsigned long pages_number;
 160
 161         rc = kstrtoul(buffer, 10, &pages_number);
 162         if (rc)
 163                 return rc;
 164
 165         pages_number *= 1 << (20 - PAGE_CACHE_SHIFT); /* MB -> pages */
 166
 167         if (pages_number <= 0 ||
 168             pages_number > OSC_MAX_DIRTY_MB_MAX << (20 - PAGE_CACHE_SHIFT) ||
 169             pages_number > totalram_pages / 4) /* 1/4 of RAM */
 170                 return -ERANGE;
 171
 172         client_obd_list_lock(&cli->cl_loi_list_lock);
 173         cli->cl_dirty_max = (u32)(pages_number << PAGE_CACHE_SHIFT);
 174         osc_wake_cache_waiters(cli);
 175         client_obd_list_unlock(&cli->cl_loi_list_lock);
 176
 177         return count;
 178 }
 179 LUSTRE_RW_ATTR(max_dirty_mb);
 180
 181 static int osc_cached_mb_seq_show(struct seq_file *m, void *v)
 182 {
 183         struct obd_device *dev = m->private;
 184         struct client_obd *cli = &dev->u.cli;
 185         int shift = 20 - PAGE_CACHE_SHIFT;
 186
 187         seq_printf(m,
 188                    "used_mb: %d\n"
 189                    "busy_cnt: %d\n",
 190                    (atomic_read(&cli->cl_lru_in_list) +
 191                     atomic_read(&cli->cl_lru_busy)) >> shift,
 192                    atomic_read(&cli->cl_lru_busy));
 193
 194         return 0;
 195 }
 196
 197 /* shrink the number of caching pages to a specific number */
 198 static ssize_t osc_cached_mb_seq_write(struct file *file,
 199                                        const char __user *buffer,
 200                                        size_t count, loff_t *off)
 201 {
 202         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
 203         struct client_obd *cli = &dev->u.cli;
 204         int pages_number, mult, rc;
 205         char kernbuf[128];
 206
 207         if (count >= sizeof(kernbuf))
 208                 return -EINVAL;
 209
 210         if (copy_from_user(kernbuf, buffer, count))
 211                 return -EFAULT;
 212         kernbuf[count] = 0;
 213
 214         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 215         buffer += lprocfs_find_named_value(kernbuf, "used_mb:", &count) -
 216                   kernbuf;
 217         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 218         if (rc)
 219                 return rc;
 220
 221         if (pages_number < 0)
 222                 return -ERANGE;
 223
 224         rc = atomic_read(&cli->cl_lru_in_list) - pages_number;
 225         if (rc > 0)
 226                 (void)osc_lru_shrink(cli, rc);
 227
 228         return count;
 229 }
 230
 231 LPROC_SEQ_FOPS(osc_cached_mb);
 232
 233 static ssize_t cur_dirty_bytes_show(struct kobject *kobj,
 234                                     struct attribute *attr,
 235                                     char *buf)
 236 {
 237         struct obd_device *dev = container_of(kobj, struct obd_device,
 238                                               obd_kobj);
 239         struct client_obd *cli = &dev->u.cli;
 240         int len;
 241
 242         client_obd_list_lock(&cli->cl_loi_list_lock);
 243         len = sprintf(buf, "%lu\n", cli->cl_dirty);
 244         client_obd_list_unlock(&cli->cl_loi_list_lock);
 245
 246         return len;
 247 }
 248 LUSTRE_RO_ATTR(cur_dirty_bytes);
 249
 250 static ssize_t cur_grant_bytes_show(struct kobject *kobj,
 251                                     struct attribute *attr,
 252                                     char *buf)
 253 {
 254         struct obd_device *dev = container_of(kobj, struct obd_device,
 255                                               obd_kobj);
 256         struct client_obd *cli = &dev->u.cli;
 257         int len;
 258
 259         client_obd_list_lock(&cli->cl_loi_list_lock);
 260         len = sprintf(buf, "%lu\n", cli->cl_avail_grant);
 261         client_obd_list_unlock(&cli->cl_loi_list_lock);
 262
 263         return len;
 264 }
 265
 266 static ssize_t cur_grant_bytes_store(struct kobject *kobj,
 267                                      struct attribute *attr,
 268                                      const char *buffer,
 269                                      size_t count)
 270 {
 271         struct obd_device *obd = container_of(kobj, struct obd_device,
 272                                               obd_kobj);
 273         struct client_obd *cli = &obd->u.cli;
 274         int rc;
 275         unsigned long long val;
 276
 277         rc = kstrtoull(buffer, 10, &val);
 278         if (rc)
 279                 return rc;
 280
 281         /* this is only for shrinking grant */
 282         client_obd_list_lock(&cli->cl_loi_list_lock);
 283         if (val >= cli->cl_avail_grant) {
 284                 client_obd_list_unlock(&cli->cl_loi_list_lock);
 285                 return -EINVAL;
 286         }
 287         client_obd_list_unlock(&cli->cl_loi_list_lock);
 288
 289         if (cli->cl_import->imp_state == LUSTRE_IMP_FULL)
 290                 rc = osc_shrink_grant_to_target(cli, val);
 291         if (rc)
 292                 return rc;
 293         return count;
 294 }
 295 LUSTRE_RW_ATTR(cur_grant_bytes);
 296
 297 static ssize_t cur_lost_grant_bytes_show(struct kobject *kobj,
 298                                          struct attribute *attr,
 299                                          char *buf)
 300 {
 301         struct obd_device *dev = container_of(kobj, struct obd_device,
 302                                               obd_kobj);
 303         struct client_obd *cli = &dev->u.cli;
 304         int len;
 305
 306         client_obd_list_lock(&cli->cl_loi_list_lock);
 307         len = sprintf(buf, "%lu\n", cli->cl_lost_grant);
 308         client_obd_list_unlock(&cli->cl_loi_list_lock);
 309
 310         return len;
 311 }
 312 LUSTRE_RO_ATTR(cur_lost_grant_bytes);
 313
 314 static ssize_t grant_shrink_interval_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_kobj);
 320
 321         return sprintf(buf, "%d\n", obd->u.cli.cl_grant_shrink_interval);
 322 }
 323
 324 static ssize_t grant_shrink_interval_store(struct kobject *kobj,
 325                                            struct attribute *attr,
 326                                            const char *buffer,
 327                                            size_t count)
 328 {
 329         struct obd_device *obd = container_of(kobj, struct obd_device,
 330                                               obd_kobj);
 331         int rc;
 332         unsigned long val;
 333
 334         rc = kstrtoul(buffer, 10, &val);
 335         if (rc)
 336                 return rc;
 337
 338         if (val <= 0)
 339                 return -ERANGE;
 340
 341         obd->u.cli.cl_grant_shrink_interval = val;
 342
 343         return count;
 344 }
 345 LUSTRE_RW_ATTR(grant_shrink_interval);
 346
 347 static ssize_t checksums_show(struct kobject *kobj,
 348                               struct attribute *attr,
 349                               char *buf)
 350 {
 351         struct obd_device *obd = container_of(kobj, struct obd_device,
 352                                               obd_kobj);
 353
 354         return sprintf(buf, "%d\n", obd->u.cli.cl_checksum ? 1 : 0);
 355 }
 356
 357 static ssize_t checksums_store(struct kobject *kobj,
 358                                struct attribute *attr,
 359                                const char *buffer,
 360                                size_t count)
 361 {
 362         struct obd_device *obd = container_of(kobj, struct obd_device,
 363                                               obd_kobj);
 364         int rc;
 365         unsigned long val;
 366
 367         rc = kstrtoul(buffer, 10, &val);
 368         if (rc)
 369                 return rc;
 370
 371         obd->u.cli.cl_checksum = (val ? 1 : 0);
 372
 373         return count;
 374 }
 375 LUSTRE_RW_ATTR(checksums);
 376
 377 static int osc_checksum_type_seq_show(struct seq_file *m, void *v)
 378 {
 379         struct obd_device *obd = m->private;
 380         int i;
 381
 382         DECLARE_CKSUM_NAME;
 383
 384         if (!obd)
 385                 return 0;
 386
 387         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 388                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 389                         continue;
 390                 if (obd->u.cli.cl_cksum_type == (1 << i))
 391                         seq_printf(m, "[%s] ", cksum_name[i]);
 392                 else
 393                         seq_printf(m, "%s ", cksum_name[i]);
 394         }
 395         seq_putc(m, '\n');
 396         return 0;
 397 }
 398
 399 static ssize_t osc_checksum_type_seq_write(struct file *file,
 400                                            const char __user *buffer,
 401                                            size_t count, loff_t *off)
 402 {
 403         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 404         int i;
 405
 406         DECLARE_CKSUM_NAME;
 407         char kernbuf[10];
 408
 409         if (!obd)
 410                 return 0;
 411
 412         if (count > sizeof(kernbuf) - 1)
 413                 return -EINVAL;
 414         if (copy_from_user(kernbuf, buffer, count))
 415                 return -EFAULT;
 416         if (count > 0 && kernbuf[count - 1] == '\n')
 417                 kernbuf[count - 1] = '\0';
 418         else
 419                 kernbuf[count] = '\0';
 420
 421         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 422                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 423                         continue;
 424                 if (!strcmp(kernbuf, cksum_name[i])) {
 425                         obd->u.cli.cl_cksum_type = 1 << i;
 426                         return count;
 427                 }
 428         }
 429         return -EINVAL;
 430 }
 431
 432 LPROC_SEQ_FOPS(osc_checksum_type);
 433
 434 static ssize_t resend_count_show(struct kobject *kobj,
 435                                  struct attribute *attr,
 436                                  char *buf)
 437 {
 438         struct obd_device *obd = container_of(kobj, struct obd_device,
 439                                               obd_kobj);
 440
 441         return sprintf(buf, "%u\n", atomic_read(&obd->u.cli.cl_resends));
 442 }
 443
 444 static ssize_t resend_count_store(struct kobject *kobj,
 445                                   struct attribute *attr,
 446                                   const char *buffer,
 447                                   size_t count)
 448 {
 449         struct obd_device *obd = container_of(kobj, struct obd_device,
 450                                               obd_kobj);
 451         int rc;
 452         unsigned long val;
 453
 454         rc = kstrtoul(buffer, 10, &val);
 455         if (rc)
 456                 return rc;
 457
 458         atomic_set(&obd->u.cli.cl_resends, val);
 459
 460         return count;
 461 }
 462 LUSTRE_RW_ATTR(resend_count);
 463
 464 static ssize_t contention_seconds_show(struct kobject *kobj,
 465                                        struct attribute *attr,
 466                                        char *buf)
 467 {
 468         struct obd_device *obd = container_of(kobj, struct obd_device,
 469                                               obd_kobj);
 470         struct osc_device *od  = obd2osc_dev(obd);
 471
 472         return sprintf(buf, "%u\n", od->od_contention_time);
 473 }
 474
 475 static ssize_t contention_seconds_store(struct kobject *kobj,
 476                                         struct attribute *attr,
 477                                         const char *buffer,
 478                                         size_t count)
 479 {
 480         struct obd_device *obd = container_of(kobj, struct obd_device,
 481                                               obd_kobj);
 482         struct osc_device *od  = obd2osc_dev(obd);
 483         int rc;
 484         int val;
 485
 486         rc = kstrtoint(buffer, 10, &val);
 487         if (rc)
 488                 return rc;
 489
 490         if (val < 0)
 491                 return -EINVAL;
 492
 493         od->od_contention_time = val;
 494
 495         return count;
 496 }
 497 LUSTRE_RW_ATTR(contention_seconds);
 498
 499 static ssize_t lockless_truncate_show(struct kobject *kobj,
 500                                       struct attribute *attr,
 501                                       char *buf)
 502 {
 503         struct obd_device *obd = container_of(kobj, struct obd_device,
 504                                               obd_kobj);
 505         struct osc_device *od  = obd2osc_dev(obd);
 506
 507         return sprintf(buf, "%u\n", od->od_lockless_truncate);
 508 }
 509
 510 static ssize_t lockless_truncate_store(struct kobject *kobj,
 511                                        struct attribute *attr,
 512                                        const char *buffer,
 513                                        size_t count)
 514 {
 515         struct obd_device *obd = container_of(kobj, struct obd_device,
 516                                               obd_kobj);
 517         struct osc_device *od  = obd2osc_dev(obd);
 518         int rc;
 519         unsigned int val;
 520
 521         rc = kstrtouint(buffer, 10, &val);
 522         if (rc)
 523                 return rc;
 524
 525         od->od_lockless_truncate = val;
 526
 527         return count;
 528 }
 529 LUSTRE_RW_ATTR(lockless_truncate);
 530
 531 static ssize_t destroys_in_flight_show(struct kobject *kobj,
 532                                        struct attribute *attr,
 533                                        char *buf)
 534 {
 535         struct obd_device *obd = container_of(kobj, struct obd_device,
 536                                               obd_kobj);
 537
 538         return sprintf(buf, "%u\n",
 539                        atomic_read(&obd->u.cli.cl_destroy_in_flight));
 540 }
 541 LUSTRE_RO_ATTR(destroys_in_flight);
 542
 543 static ssize_t max_pages_per_rpc_show(struct kobject *kobj,
 544                                       struct attribute *attr,
 545                                       char *buf)
 546 {
 547         struct obd_device *dev = container_of(kobj, struct obd_device,
 548                                               obd_kobj);
 549         struct client_obd *cli = &dev->u.cli;
 550
 551         return sprintf(buf, "%d\n", cli->cl_max_pages_per_rpc);
 552 }
 553
 554 static ssize_t max_pages_per_rpc_store(struct kobject *kobj,
 555                                        struct attribute *attr,
 556                                        const char *buffer,
 557                                        size_t count)
 558 {
 559         struct obd_device *dev = container_of(kobj, struct obd_device,
 560                                               obd_kobj);
 561         struct client_obd *cli = &dev->u.cli;
 562         struct obd_connect_data *ocd = &cli->cl_import->imp_connect_data;
 563         int chunk_mask, rc;
 564         unsigned long long val;
 565
 566         rc = kstrtoull(buffer, 10, &val);
 567         if (rc)
 568                 return rc;
 569
 570         /* if the max_pages is specified in bytes, convert to pages */
 571         if (val >= ONE_MB_BRW_SIZE)
 572                 val >>= PAGE_CACHE_SHIFT;
 573
 574         chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_CACHE_SHIFT)) - 1);
 575         /* max_pages_per_rpc must be chunk aligned */
 576         val = (val + ~chunk_mask) & chunk_mask;
 577         if (val == 0 || val > ocd->ocd_brw_size >> PAGE_CACHE_SHIFT) {
 578                 return -ERANGE;
 579         }
 580         client_obd_list_lock(&cli->cl_loi_list_lock);
 581         cli->cl_max_pages_per_rpc = val;
 582         client_obd_list_unlock(&cli->cl_loi_list_lock);
 583
 584         return count;
 585 }
 586 LUSTRE_RW_ATTR(max_pages_per_rpc);
 587
 588 LPROC_SEQ_FOPS_RO_TYPE(osc, connect_flags);
 589 LPROC_SEQ_FOPS_RO_TYPE(osc, server_uuid);
 590 LPROC_SEQ_FOPS_RO_TYPE(osc, conn_uuid);
 591 LPROC_SEQ_FOPS_RO_TYPE(osc, timeouts);
 592 LPROC_SEQ_FOPS_RO_TYPE(osc, state);
 593
 594 LPROC_SEQ_FOPS_WR_ONLY(osc, ping);
 595
 596 LPROC_SEQ_FOPS_RW_TYPE(osc, import);
 597 LPROC_SEQ_FOPS_RW_TYPE(osc, pinger_recov);
 598
 599 static struct lprocfs_vars lprocfs_osc_obd_vars[] = {
 600         { "ping",            &osc_ping_fops,    NULL, 0222 },
 601         { "connect_flags",   &osc_connect_flags_fops, NULL, 0 },
 602         /*{ "filegroups",      lprocfs_rd_filegroups,  NULL, 0 },*/
 603         { "ost_server_uuid", &osc_server_uuid_fops, NULL, 0 },
 604         { "ost_conn_uuid",   &osc_conn_uuid_fops, NULL, 0 },
 605         { "osc_cached_mb",   &osc_cached_mb_fops, NULL },
 606         { "checksum_type",   &osc_checksum_type_fops, NULL },
 607         { "timeouts",        &osc_timeouts_fops, NULL, 0 },
 608         { "import",             &osc_import_fops, NULL },
 609         { "state",              &osc_state_fops, NULL, 0 },
 610         { "pinger_recov",       &osc_pinger_recov_fops, NULL },
 611         { NULL }
 612 };
 613
 614 #define pct(a, b) (b ? a * 100 / b : 0)
 615
 616 static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 617 {
 618         struct timespec64 now;
 619         struct obd_device *dev = seq->private;
 620         struct client_obd *cli = &dev->u.cli;
 621         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 622         int i;
 623
 624         ktime_get_real_ts64(&now);
 625
 626         client_obd_list_lock(&cli->cl_loi_list_lock);
 627
 628         seq_printf(seq, "snapshot_time:  %llu.%9lu (secs.usecs)\n",
 629                    (s64)now.tv_sec, (unsigned long)now.tv_nsec);
 630         seq_printf(seq, "read RPCs in flight:  %d\n",
 631                    cli->cl_r_in_flight);
 632         seq_printf(seq, "write RPCs in flight: %d\n",
 633                    cli->cl_w_in_flight);
 634         seq_printf(seq, "pending write pages:  %d\n",
 635                    atomic_read(&cli->cl_pending_w_pages));
 636         seq_printf(seq, "pending read pages:   %d\n",
 637                    atomic_read(&cli->cl_pending_r_pages));
 638
 639         seq_puts(seq, "\n\t\t\tread\t\t\twrite\n");
 640         seq_puts(seq, "pages per rpc     rpcs   % cum % |");
 641         seq_puts(seq, "       rpcs   % cum %\n");
 642
 643         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 644         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 645
 646         read_cum = 0;
 647         write_cum = 0;
 648         for (i = 0; i < OBD_HIST_MAX; i++) {
 649                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 650                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 651
 652                 read_cum += r;
 653                 write_cum += w;
 654                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 655                            1 << i, r, pct(r, read_tot),
 656                            pct(read_cum, read_tot), w,
 657                            pct(w, write_tot),
 658                            pct(write_cum, write_tot));
 659                 if (read_cum == read_tot && write_cum == write_tot)
 660                         break;
 661         }
 662
 663         seq_puts(seq, "\n\t\t\tread\t\t\twrite\n");
 664         seq_puts(seq, "rpcs in flight   rpcs   % cum % |");
 665         seq_puts(seq, "       rpcs   % cum %\n");
 666
 667         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 668         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
 669
 670         read_cum = 0;
 671         write_cum = 0;
 672         for (i = 0; i < OBD_HIST_MAX; i++) {
 673                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
 674                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
 675
 676                 read_cum += r;
 677                 write_cum += w;
 678                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 679                            i, r, pct(r, read_tot),
 680                            pct(read_cum, read_tot), w,
 681                            pct(w, write_tot),
 682                            pct(write_cum, write_tot));
 683                 if (read_cum == read_tot && write_cum == write_tot)
 684                         break;
 685         }
 686
 687         seq_puts(seq, "\n\t\t\tread\t\t\twrite\n");
 688         seq_puts(seq, "offset           rpcs   % cum % |");
 689         seq_puts(seq, "       rpcs   % cum %\n");
 690
 691         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
 692         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist);
 693
 694         read_cum = 0;
 695         write_cum = 0;
 696         for (i = 0; i < OBD_HIST_MAX; i++) {
 697                 unsigned long r = cli->cl_read_offset_hist.oh_buckets[i];
 698                 unsigned long w = cli->cl_write_offset_hist.oh_buckets[i];
 699
 700                 read_cum += r;
 701                 write_cum += w;
 702                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 703                            (i == 0) ? 0 : 1 << (i - 1),
 704                            r, pct(r, read_tot), pct(read_cum, read_tot),
 705                            w, pct(w, write_tot), pct(write_cum, write_tot));
 706                 if (read_cum == read_tot && write_cum == write_tot)
 707                         break;
 708         }
 709
 710         client_obd_list_unlock(&cli->cl_loi_list_lock);
 711
 712         return 0;
 713 }
 714
 715 #undef pct
 716
 717 static ssize_t osc_rpc_stats_seq_write(struct file *file,
 718                                        const char __user *buf,
 719                                        size_t len, loff_t *off)
 720 {
 721         struct seq_file *seq = file->private_data;
 722         struct obd_device *dev = seq->private;
 723         struct client_obd *cli = &dev->u.cli;
 724
 725         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 726         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 727         lprocfs_oh_clear(&cli->cl_read_page_hist);
 728         lprocfs_oh_clear(&cli->cl_write_page_hist);
 729         lprocfs_oh_clear(&cli->cl_read_offset_hist);
 730         lprocfs_oh_clear(&cli->cl_write_offset_hist);
 731
 732         return len;
 733 }
 734
 735 LPROC_SEQ_FOPS(osc_rpc_stats);
 736
 737 static int osc_stats_seq_show(struct seq_file *seq, void *v)
 738 {
 739         struct timespec64 now;
 740         struct obd_device *dev = seq->private;
 741         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 742
 743         ktime_get_real_ts64(&now);
 744
 745         seq_printf(seq, "snapshot_time:  %llu.%9lu (secs.usecs)\n",
 746                    (s64)now.tv_sec, (unsigned long)now.tv_nsec);
 747         seq_printf(seq, "lockless_write_bytes\t\t%llu\n",
 748                    stats->os_lockless_writes);
 749         seq_printf(seq, "lockless_read_bytes\t\t%llu\n",
 750                    stats->os_lockless_reads);
 751         seq_printf(seq, "lockless_truncate\t\t%llu\n",
 752                    stats->os_lockless_truncates);
 753         return 0;
 754 }
 755
 756 static ssize_t osc_stats_seq_write(struct file *file,
 757                                    const char __user *buf,
 758                                    size_t len, loff_t *off)
 759 {
 760         struct seq_file *seq = file->private_data;
 761         struct obd_device *dev = seq->private;
 762         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 763
 764         memset(stats, 0, sizeof(*stats));
 765         return len;
 766 }
 767
 768 LPROC_SEQ_FOPS(osc_stats);
 769
 770 int lproc_osc_attach_seqstat(struct obd_device *dev)
 771 {
 772         int rc;
 773
 774         rc = ldebugfs_seq_create(dev->obd_debugfs_entry, "osc_stats", 0644,
 775                                  &osc_stats_fops, dev);
 776         if (rc == 0)
 777                 rc = ldebugfs_obd_seq_create(dev, "rpc_stats", 0644,
 778                                              &osc_rpc_stats_fops, dev);
 779
 780         return rc;
 781 }
 782
 783 static struct attribute *osc_attrs[] = {
 784         &lustre_attr_active.attr,
 785         &lustre_attr_checksums.attr,
 786         &lustre_attr_contention_seconds.attr,
 787         &lustre_attr_cur_dirty_bytes.attr,
 788         &lustre_attr_cur_grant_bytes.attr,
 789         &lustre_attr_cur_lost_grant_bytes.attr,
 790         &lustre_attr_destroys_in_flight.attr,
 791         &lustre_attr_grant_shrink_interval.attr,
 792         &lustre_attr_lockless_truncate.attr,
 793         &lustre_attr_max_dirty_mb.attr,
 794         &lustre_attr_max_pages_per_rpc.attr,
 795         &lustre_attr_max_rpcs_in_flight.attr,
 796         &lustre_attr_resend_count.attr,
 797         NULL,
 798 };
 799
 800 static struct attribute_group osc_attr_group = {
 801         .attrs = osc_attrs,
 802 };
 803
 804 void lprocfs_osc_init_vars(struct lprocfs_static_vars *lvars)
 805 {
 806         lvars->sysfs_vars  = &osc_attr_group;
 807         lvars->obd_vars    = lprocfs_osc_obd_vars;
 808 }