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.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, 2015, 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/statfs.h>
  35 #include "../include/obd_cksum.h"
  36 #include "../include/obd_class.h"
  37 #include "../include/lprocfs_status.h"
  38 #include <linux/seq_file.h>
  39 #include "osc_internal.h"
  40
  41 static ssize_t active_show(struct kobject *kobj, struct attribute *attr,
  42                            char *buf)
  43 {
  44         struct obd_device *dev = container_of(kobj, struct obd_device,
  45                                               obd_kobj);
  46
  47         return sprintf(buf, "%d\n", !dev->u.cli.cl_import->imp_deactive);
  48 }
  49
  50 static ssize_t active_store(struct kobject *kobj, struct attribute *attr,
  51                             const char *buffer,
  52                             size_t count)
  53 {
  54         struct obd_device *dev = container_of(kobj, struct obd_device,
  55                                               obd_kobj);
  56         int rc;
  57         unsigned long val;
  58
  59         rc = kstrtoul(buffer, 10, &val);
  60         if (rc)
  61                 return rc;
  62         if (val > 1)
  63                 return -ERANGE;
  64
  65         /* opposite senses */
  66         if (dev->u.cli.cl_import->imp_deactive == val)
  67                 rc = ptlrpc_set_import_active(dev->u.cli.cl_import, val);
  68         else
  69                 CDEBUG(D_CONFIG, "activate %ld: ignoring repeat request\n",
  70                        val);
  71
  72         return count;
  73 }
  74 LUSTRE_RW_ATTR(active);
  75
  76 static ssize_t max_rpcs_in_flight_show(struct kobject *kobj,
  77                                        struct attribute *attr,
  78                                        char *buf)
  79 {
  80         struct obd_device *dev = container_of(kobj, struct obd_device,
  81                                               obd_kobj);
  82         struct client_obd *cli = &dev->u.cli;
  83
  84         return sprintf(buf, "%u\n", cli->cl_max_rpcs_in_flight);
  85 }
  86
  87 static ssize_t max_rpcs_in_flight_store(struct kobject *kobj,
  88                                         struct attribute *attr,
  89                                         const char *buffer,
  90                                         size_t count)
  91 {
  92         struct obd_device *dev = container_of(kobj, struct obd_device,
  93                                               obd_kobj);
  94         struct client_obd *cli = &dev->u.cli;
  95         int rc;
  96         unsigned long val;
  97         int adding, added, req_count;
  98
  99         rc = kstrtoul(buffer, 10, &val);
 100         if (rc)
 101                 return rc;
 102
 103         if (val < 1 || val > OSC_MAX_RIF_MAX)
 104                 return -ERANGE;
 105
 106         adding = val - cli->cl_max_rpcs_in_flight;
 107         req_count = atomic_read(&osc_pool_req_count);
 108         if (adding > 0 && req_count < osc_reqpool_maxreqcount) {
 109                 /*
 110                  * There might be some race which will cause over-limit
 111                  * allocation, but it is fine.
 112                  */
 113                 if (req_count + adding > osc_reqpool_maxreqcount)
 114                         adding = osc_reqpool_maxreqcount - req_count;
 115
 116                 added = osc_rq_pool->prp_populate(osc_rq_pool, adding);
 117                 atomic_add(added, &osc_pool_req_count);
 118         }
 119
 120         spin_lock(&cli->cl_loi_list_lock);
 121         cli->cl_max_rpcs_in_flight = val;
 122         spin_unlock(&cli->cl_loi_list_lock);
 123
 124         return count;
 125 }
 126 LUSTRE_RW_ATTR(max_rpcs_in_flight);
 127
 128 static ssize_t max_dirty_mb_show(struct kobject *kobj,
 129                                  struct attribute *attr,
 130                                  char *buf)
 131 {
 132         struct obd_device *dev = container_of(kobj, struct obd_device,
 133                                               obd_kobj);
 134         struct client_obd *cli = &dev->u.cli;
 135         long val;
 136         int mult;
 137
 138         spin_lock(&cli->cl_loi_list_lock);
 139         val = cli->cl_dirty_max;
 140         spin_unlock(&cli->cl_loi_list_lock);
 141
 142         mult = 1 << 20;
 143         return lprocfs_read_frac_helper(buf, PAGE_SIZE, val, mult);
 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 *dev = container_of(kobj, struct obd_device,
 152                                               obd_kobj);
 153         struct client_obd *cli = &dev->u.cli;
 154         int rc;
 155         unsigned long pages_number;
 156
 157         rc = kstrtoul(buffer, 10, &pages_number);
 158         if (rc)
 159                 return rc;
 160
 161         pages_number *= 1 << (20 - PAGE_SHIFT); /* MB -> pages */
 162
 163         if (pages_number <= 0 ||
 164             pages_number > OSC_MAX_DIRTY_MB_MAX << (20 - PAGE_SHIFT) ||
 165             pages_number > totalram_pages / 4) /* 1/4 of RAM */
 166                 return -ERANGE;
 167
 168         spin_lock(&cli->cl_loi_list_lock);
 169         cli->cl_dirty_max = (u32)(pages_number << PAGE_SHIFT);
 170         osc_wake_cache_waiters(cli);
 171         spin_unlock(&cli->cl_loi_list_lock);
 172
 173         return count;
 174 }
 175 LUSTRE_RW_ATTR(max_dirty_mb);
 176
 177 static int osc_cached_mb_seq_show(struct seq_file *m, void *v)
 178 {
 179         struct obd_device *dev = m->private;
 180         struct client_obd *cli = &dev->u.cli;
 181         int shift = 20 - PAGE_SHIFT;
 182
 183         seq_printf(m,
 184                    "used_mb: %d\n"
 185                    "busy_cnt: %d\n",
 186                    (atomic_read(&cli->cl_lru_in_list) +
 187                     atomic_read(&cli->cl_lru_busy)) >> shift,
 188                    atomic_read(&cli->cl_lru_busy));
 189
 190         return 0;
 191 }
 192
 193 /* shrink the number of caching pages to a specific number */
 194 static ssize_t osc_cached_mb_seq_write(struct file *file,
 195                                        const char __user *buffer,
 196                                        size_t count, loff_t *off)
 197 {
 198         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
 199         struct client_obd *cli = &dev->u.cli;
 200         int pages_number, mult, rc;
 201         char kernbuf[128];
 202
 203         if (count >= sizeof(kernbuf))
 204                 return -EINVAL;
 205
 206         if (copy_from_user(kernbuf, buffer, count))
 207                 return -EFAULT;
 208         kernbuf[count] = 0;
 209
 210         mult = 1 << (20 - PAGE_SHIFT);
 211         buffer += lprocfs_find_named_value(kernbuf, "used_mb:", &count) -
 212                   kernbuf;
 213         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 214         if (rc)
 215                 return rc;
 216
 217         if (pages_number < 0)
 218                 return -ERANGE;
 219
 220         rc = atomic_read(&cli->cl_lru_in_list) - pages_number;
 221         if (rc > 0) {
 222                 struct lu_env *env;
 223                 int refcheck;
 224
 225                 env = cl_env_get(&refcheck);
 226                 if (!IS_ERR(env)) {
 227                         (void)osc_lru_shrink(env, cli, rc, true);
 228                         cl_env_put(env, &refcheck);
 229                 }
 230         }
 231
 232         return count;
 233 }
 234
 235 LPROC_SEQ_FOPS(osc_cached_mb);
 236
 237 static ssize_t cur_dirty_bytes_show(struct kobject *kobj,
 238                                     struct attribute *attr,
 239                                     char *buf)
 240 {
 241         struct obd_device *dev = container_of(kobj, struct obd_device,
 242                                               obd_kobj);
 243         struct client_obd *cli = &dev->u.cli;
 244         int len;
 245
 246         spin_lock(&cli->cl_loi_list_lock);
 247         len = sprintf(buf, "%lu\n", cli->cl_dirty);
 248         spin_unlock(&cli->cl_loi_list_lock);
 249
 250         return len;
 251 }
 252 LUSTRE_RO_ATTR(cur_dirty_bytes);
 253
 254 static ssize_t cur_grant_bytes_show(struct kobject *kobj,
 255                                     struct attribute *attr,
 256                                     char *buf)
 257 {
 258         struct obd_device *dev = container_of(kobj, struct obd_device,
 259                                               obd_kobj);
 260         struct client_obd *cli = &dev->u.cli;
 261         int len;
 262
 263         spin_lock(&cli->cl_loi_list_lock);
 264         len = sprintf(buf, "%lu\n", cli->cl_avail_grant);
 265         spin_unlock(&cli->cl_loi_list_lock);
 266
 267         return len;
 268 }
 269
 270 static ssize_t cur_grant_bytes_store(struct kobject *kobj,
 271                                      struct attribute *attr,
 272                                      const char *buffer,
 273                                      size_t count)
 274 {
 275         struct obd_device *obd = container_of(kobj, struct obd_device,
 276                                               obd_kobj);
 277         struct client_obd *cli = &obd->u.cli;
 278         int rc;
 279         unsigned long long val;
 280
 281         rc = kstrtoull(buffer, 10, &val);
 282         if (rc)
 283                 return rc;
 284
 285         /* this is only for shrinking grant */
 286         spin_lock(&cli->cl_loi_list_lock);
 287         if (val >= cli->cl_avail_grant) {
 288                 spin_unlock(&cli->cl_loi_list_lock);
 289                 return -EINVAL;
 290         }
 291         spin_unlock(&cli->cl_loi_list_lock);
 292
 293         if (cli->cl_import->imp_state == LUSTRE_IMP_FULL)
 294                 rc = osc_shrink_grant_to_target(cli, val);
 295         if (rc)
 296                 return rc;
 297         return count;
 298 }
 299 LUSTRE_RW_ATTR(cur_grant_bytes);
 300
 301 static ssize_t cur_lost_grant_bytes_show(struct kobject *kobj,
 302                                          struct attribute *attr,
 303                                          char *buf)
 304 {
 305         struct obd_device *dev = container_of(kobj, struct obd_device,
 306                                               obd_kobj);
 307         struct client_obd *cli = &dev->u.cli;
 308         int len;
 309
 310         spin_lock(&cli->cl_loi_list_lock);
 311         len = sprintf(buf, "%lu\n", cli->cl_lost_grant);
 312         spin_unlock(&cli->cl_loi_list_lock);
 313
 314         return len;
 315 }
 316 LUSTRE_RO_ATTR(cur_lost_grant_bytes);
 317
 318 static ssize_t grant_shrink_interval_show(struct kobject *kobj,
 319                                           struct attribute *attr,
 320                                           char *buf)
 321 {
 322         struct obd_device *obd = container_of(kobj, struct obd_device,
 323                                               obd_kobj);
 324
 325         return sprintf(buf, "%d\n", obd->u.cli.cl_grant_shrink_interval);
 326 }
 327
 328 static ssize_t grant_shrink_interval_store(struct kobject *kobj,
 329                                            struct attribute *attr,
 330                                            const char *buffer,
 331                                            size_t count)
 332 {
 333         struct obd_device *obd = container_of(kobj, struct obd_device,
 334                                               obd_kobj);
 335         int rc;
 336         unsigned long val;
 337
 338         rc = kstrtoul(buffer, 10, &val);
 339         if (rc)
 340                 return rc;
 341
 342         if (val <= 0)
 343                 return -ERANGE;
 344
 345         obd->u.cli.cl_grant_shrink_interval = val;
 346
 347         return count;
 348 }
 349 LUSTRE_RW_ATTR(grant_shrink_interval);
 350
 351 static ssize_t checksums_show(struct kobject *kobj,
 352                               struct attribute *attr,
 353                               char *buf)
 354 {
 355         struct obd_device *obd = container_of(kobj, struct obd_device,
 356                                               obd_kobj);
 357
 358         return sprintf(buf, "%d\n", obd->u.cli.cl_checksum ? 1 : 0);
 359 }
 360
 361 static ssize_t checksums_store(struct kobject *kobj,
 362                                struct attribute *attr,
 363                                const char *buffer,
 364                                size_t count)
 365 {
 366         struct obd_device *obd = container_of(kobj, struct obd_device,
 367                                               obd_kobj);
 368         int rc;
 369         unsigned long val;
 370
 371         rc = kstrtoul(buffer, 10, &val);
 372         if (rc)
 373                 return rc;
 374
 375         obd->u.cli.cl_checksum = (val ? 1 : 0);
 376
 377         return count;
 378 }
 379 LUSTRE_RW_ATTR(checksums);
 380
 381 static int osc_checksum_type_seq_show(struct seq_file *m, void *v)
 382 {
 383         struct obd_device *obd = m->private;
 384         int i;
 385
 386         DECLARE_CKSUM_NAME;
 387
 388         if (!obd)
 389                 return 0;
 390
 391         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 392                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 393                         continue;
 394                 if (obd->u.cli.cl_cksum_type == (1 << i))
 395                         seq_printf(m, "[%s] ", cksum_name[i]);
 396                 else
 397                         seq_printf(m, "%s ", cksum_name[i]);
 398         }
 399         seq_putc(m, '\n');
 400         return 0;
 401 }
 402
 403 static ssize_t osc_checksum_type_seq_write(struct file *file,
 404                                            const char __user *buffer,
 405                                            size_t count, loff_t *off)
 406 {
 407         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 408         int i;
 409
 410         DECLARE_CKSUM_NAME;
 411         char kernbuf[10];
 412
 413         if (!obd)
 414                 return 0;
 415
 416         if (count > sizeof(kernbuf) - 1)
 417                 return -EINVAL;
 418         if (copy_from_user(kernbuf, buffer, count))
 419                 return -EFAULT;
 420         if (count > 0 && kernbuf[count - 1] == '\n')
 421                 kernbuf[count - 1] = '\0';
 422         else
 423                 kernbuf[count] = '\0';
 424
 425         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 426                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 427                         continue;
 428                 if (!strcmp(kernbuf, cksum_name[i])) {
 429                         obd->u.cli.cl_cksum_type = 1 << i;
 430                         return count;
 431                 }
 432         }
 433         return -EINVAL;
 434 }
 435
 436 LPROC_SEQ_FOPS(osc_checksum_type);
 437
 438 static ssize_t resend_count_show(struct kobject *kobj,
 439                                  struct attribute *attr,
 440                                  char *buf)
 441 {
 442         struct obd_device *obd = container_of(kobj, struct obd_device,
 443                                               obd_kobj);
 444
 445         return sprintf(buf, "%u\n", atomic_read(&obd->u.cli.cl_resends));
 446 }
 447
 448 static ssize_t resend_count_store(struct kobject *kobj,
 449                                   struct attribute *attr,
 450                                   const char *buffer,
 451                                   size_t count)
 452 {
 453         struct obd_device *obd = container_of(kobj, struct obd_device,
 454                                               obd_kobj);
 455         int rc;
 456         unsigned long val;
 457
 458         rc = kstrtoul(buffer, 10, &val);
 459         if (rc)
 460                 return rc;
 461
 462         atomic_set(&obd->u.cli.cl_resends, val);
 463
 464         return count;
 465 }
 466 LUSTRE_RW_ATTR(resend_count);
 467
 468 static ssize_t contention_seconds_show(struct kobject *kobj,
 469                                        struct attribute *attr,
 470                                        char *buf)
 471 {
 472         struct obd_device *obd = container_of(kobj, struct obd_device,
 473                                               obd_kobj);
 474         struct osc_device *od  = obd2osc_dev(obd);
 475
 476         return sprintf(buf, "%u\n", od->od_contention_time);
 477 }
 478
 479 static ssize_t contention_seconds_store(struct kobject *kobj,
 480                                         struct attribute *attr,
 481                                         const char *buffer,
 482                                         size_t count)
 483 {
 484         struct obd_device *obd = container_of(kobj, struct obd_device,
 485                                               obd_kobj);
 486         struct osc_device *od  = obd2osc_dev(obd);
 487         int rc;
 488         int val;
 489
 490         rc = kstrtoint(buffer, 10, &val);
 491         if (rc)
 492                 return rc;
 493
 494         if (val < 0)
 495                 return -EINVAL;
 496
 497         od->od_contention_time = val;
 498
 499         return count;
 500 }
 501 LUSTRE_RW_ATTR(contention_seconds);
 502
 503 static ssize_t lockless_truncate_show(struct kobject *kobj,
 504                                       struct attribute *attr,
 505                                       char *buf)
 506 {
 507         struct obd_device *obd = container_of(kobj, struct obd_device,
 508                                               obd_kobj);
 509         struct osc_device *od  = obd2osc_dev(obd);
 510
 511         return sprintf(buf, "%u\n", od->od_lockless_truncate);
 512 }
 513
 514 static ssize_t lockless_truncate_store(struct kobject *kobj,
 515                                        struct attribute *attr,
 516                                        const char *buffer,
 517                                        size_t count)
 518 {
 519         struct obd_device *obd = container_of(kobj, struct obd_device,
 520                                               obd_kobj);
 521         struct osc_device *od  = obd2osc_dev(obd);
 522         int rc;
 523         unsigned int val;
 524
 525         rc = kstrtouint(buffer, 10, &val);
 526         if (rc)
 527                 return rc;
 528
 529         od->od_lockless_truncate = val;
 530
 531         return count;
 532 }
 533 LUSTRE_RW_ATTR(lockless_truncate);
 534
 535 static ssize_t destroys_in_flight_show(struct kobject *kobj,
 536                                        struct attribute *attr,
 537                                        char *buf)
 538 {
 539         struct obd_device *obd = container_of(kobj, struct obd_device,
 540                                               obd_kobj);
 541
 542         return sprintf(buf, "%u\n",
 543                        atomic_read(&obd->u.cli.cl_destroy_in_flight));
 544 }
 545 LUSTRE_RO_ATTR(destroys_in_flight);
 546
 547 static ssize_t max_pages_per_rpc_show(struct kobject *kobj,
 548                                       struct attribute *attr,
 549                                       char *buf)
 550 {
 551         struct obd_device *dev = container_of(kobj, struct obd_device,
 552                                               obd_kobj);
 553         struct client_obd *cli = &dev->u.cli;
 554
 555         return sprintf(buf, "%d\n", cli->cl_max_pages_per_rpc);
 556 }
 557
 558 static ssize_t max_pages_per_rpc_store(struct kobject *kobj,
 559                                        struct attribute *attr,
 560                                        const char *buffer,
 561                                        size_t count)
 562 {
 563         struct obd_device *dev = container_of(kobj, struct obd_device,
 564                                               obd_kobj);
 565         struct client_obd *cli = &dev->u.cli;
 566         struct obd_connect_data *ocd = &cli->cl_import->imp_connect_data;
 567         int chunk_mask, rc;
 568         unsigned long long val;
 569
 570         rc = kstrtoull(buffer, 10, &val);
 571         if (rc)
 572                 return rc;
 573
 574         /* if the max_pages is specified in bytes, convert to pages */
 575         if (val >= ONE_MB_BRW_SIZE)
 576                 val >>= PAGE_SHIFT;
 577
 578         chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_SHIFT)) - 1);
 579         /* max_pages_per_rpc must be chunk aligned */
 580         val = (val + ~chunk_mask) & chunk_mask;
 581         if (val == 0 || val > ocd->ocd_brw_size >> PAGE_SHIFT) {
 582                 return -ERANGE;
 583         }
 584         spin_lock(&cli->cl_loi_list_lock);
 585         cli->cl_max_pages_per_rpc = val;
 586         spin_unlock(&cli->cl_loi_list_lock);
 587
 588         return count;
 589 }
 590 LUSTRE_RW_ATTR(max_pages_per_rpc);
 591
 592 static ssize_t unstable_stats_show(struct kobject *kobj,
 593                                    struct attribute *attr,
 594                                    char *buf)
 595 {
 596         struct obd_device *dev = container_of(kobj, struct obd_device,
 597                                               obd_kobj);
 598         struct client_obd *cli = &dev->u.cli;
 599         int pages, mb;
 600
 601         pages = atomic_read(&cli->cl_unstable_count);
 602         mb = (pages * PAGE_SIZE) >> 20;
 603
 604         return sprintf(buf, "unstable_pages: %8d\n"
 605                        "unstable_mb:    %8d\n", pages, mb);
 606 }
 607 LUSTRE_RO_ATTR(unstable_stats);
 608
 609 LPROC_SEQ_FOPS_RO_TYPE(osc, connect_flags);
 610 LPROC_SEQ_FOPS_RO_TYPE(osc, server_uuid);
 611 LPROC_SEQ_FOPS_RO_TYPE(osc, conn_uuid);
 612 LPROC_SEQ_FOPS_RO_TYPE(osc, timeouts);
 613 LPROC_SEQ_FOPS_RO_TYPE(osc, state);
 614
 615 LPROC_SEQ_FOPS_WR_ONLY(osc, ping);
 616
 617 LPROC_SEQ_FOPS_RW_TYPE(osc, import);
 618 LPROC_SEQ_FOPS_RW_TYPE(osc, pinger_recov);
 619
 620 static struct lprocfs_vars lprocfs_osc_obd_vars[] = {
 621         { "ping",            &osc_ping_fops,    NULL, 0222 },
 622         { "connect_flags",   &osc_connect_flags_fops, NULL, 0 },
 623         /*{ "filegroups",      lprocfs_rd_filegroups,  NULL, 0 },*/
 624         { "ost_server_uuid", &osc_server_uuid_fops, NULL, 0 },
 625         { "ost_conn_uuid",   &osc_conn_uuid_fops, NULL, 0 },
 626         { "osc_cached_mb",   &osc_cached_mb_fops, NULL },
 627         { "checksum_type",   &osc_checksum_type_fops, NULL },
 628         { "timeouts",        &osc_timeouts_fops, NULL, 0 },
 629         { "import",             &osc_import_fops, NULL },
 630         { "state",              &osc_state_fops, NULL, 0 },
 631         { "pinger_recov",       &osc_pinger_recov_fops, NULL },
 632         { NULL }
 633 };
 634
 635 #define pct(a, b) (b ? a * 100 / b : 0)
 636
 637 static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 638 {
 639         struct timespec64 now;
 640         struct obd_device *dev = seq->private;
 641         struct client_obd *cli = &dev->u.cli;
 642         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 643         int i;
 644
 645         ktime_get_real_ts64(&now);
 646
 647         spin_lock(&cli->cl_loi_list_lock);
 648
 649         seq_printf(seq, "snapshot_time:  %llu.%9lu (secs.usecs)\n",
 650                    (s64)now.tv_sec, (unsigned long)now.tv_nsec);
 651         seq_printf(seq, "read RPCs in flight:  %d\n",
 652                    cli->cl_r_in_flight);
 653         seq_printf(seq, "write RPCs in flight: %d\n",
 654                    cli->cl_w_in_flight);
 655         seq_printf(seq, "pending write pages:  %d\n",
 656                    atomic_read(&cli->cl_pending_w_pages));
 657         seq_printf(seq, "pending read pages:   %d\n",
 658                    atomic_read(&cli->cl_pending_r_pages));
 659
 660         seq_puts(seq, "\n\t\t\tread\t\t\twrite\n");
 661         seq_puts(seq, "pages per rpc     rpcs   % cum % |");
 662         seq_puts(seq, "       rpcs   % cum %\n");
 663
 664         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 665         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 666
 667         read_cum = 0;
 668         write_cum = 0;
 669         for (i = 0; i < OBD_HIST_MAX; i++) {
 670                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 671                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 672
 673                 read_cum += r;
 674                 write_cum += w;
 675                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 676                            1 << i, r, pct(r, read_tot),
 677                            pct(read_cum, read_tot), w,
 678                            pct(w, write_tot),
 679                            pct(write_cum, write_tot));
 680                 if (read_cum == read_tot && write_cum == write_tot)
 681                         break;
 682         }
 683
 684         seq_puts(seq, "\n\t\t\tread\t\t\twrite\n");
 685         seq_puts(seq, "rpcs in flight   rpcs   % cum % |");
 686         seq_puts(seq, "       rpcs   % cum %\n");
 687
 688         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 689         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
 690
 691         read_cum = 0;
 692         write_cum = 0;
 693         for (i = 0; i < OBD_HIST_MAX; i++) {
 694                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
 695                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
 696
 697                 read_cum += r;
 698                 write_cum += w;
 699                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 700                            i, r, pct(r, read_tot),
 701                            pct(read_cum, read_tot), w,
 702                            pct(w, write_tot),
 703                            pct(write_cum, write_tot));
 704                 if (read_cum == read_tot && write_cum == write_tot)
 705                         break;
 706         }
 707
 708         seq_puts(seq, "\n\t\t\tread\t\t\twrite\n");
 709         seq_puts(seq, "offset           rpcs   % cum % |");
 710         seq_puts(seq, "       rpcs   % cum %\n");
 711
 712         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
 713         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist);
 714
 715         read_cum = 0;
 716         write_cum = 0;
 717         for (i = 0; i < OBD_HIST_MAX; i++) {
 718                 unsigned long r = cli->cl_read_offset_hist.oh_buckets[i];
 719                 unsigned long w = cli->cl_write_offset_hist.oh_buckets[i];
 720
 721                 read_cum += r;
 722                 write_cum += w;
 723                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 724                            (i == 0) ? 0 : 1 << (i - 1),
 725                            r, pct(r, read_tot), pct(read_cum, read_tot),
 726                            w, pct(w, write_tot), pct(write_cum, write_tot));
 727                 if (read_cum == read_tot && write_cum == write_tot)
 728                         break;
 729         }
 730
 731         spin_unlock(&cli->cl_loi_list_lock);
 732
 733         return 0;
 734 }
 735
 736 #undef pct
 737
 738 static ssize_t osc_rpc_stats_seq_write(struct file *file,
 739                                        const char __user *buf,
 740                                        size_t len, loff_t *off)
 741 {
 742         struct seq_file *seq = file->private_data;
 743         struct obd_device *dev = seq->private;
 744         struct client_obd *cli = &dev->u.cli;
 745
 746         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 747         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 748         lprocfs_oh_clear(&cli->cl_read_page_hist);
 749         lprocfs_oh_clear(&cli->cl_write_page_hist);
 750         lprocfs_oh_clear(&cli->cl_read_offset_hist);
 751         lprocfs_oh_clear(&cli->cl_write_offset_hist);
 752
 753         return len;
 754 }
 755
 756 LPROC_SEQ_FOPS(osc_rpc_stats);
 757
 758 static int osc_stats_seq_show(struct seq_file *seq, void *v)
 759 {
 760         struct timespec64 now;
 761         struct obd_device *dev = seq->private;
 762         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 763
 764         ktime_get_real_ts64(&now);
 765
 766         seq_printf(seq, "snapshot_time:  %llu.%9lu (secs.usecs)\n",
 767                    (s64)now.tv_sec, (unsigned long)now.tv_nsec);
 768         seq_printf(seq, "lockless_write_bytes\t\t%llu\n",
 769                    stats->os_lockless_writes);
 770         seq_printf(seq, "lockless_read_bytes\t\t%llu\n",
 771                    stats->os_lockless_reads);
 772         seq_printf(seq, "lockless_truncate\t\t%llu\n",
 773                    stats->os_lockless_truncates);
 774         return 0;
 775 }
 776
 777 static ssize_t osc_stats_seq_write(struct file *file,
 778                                    const char __user *buf,
 779                                    size_t len, loff_t *off)
 780 {
 781         struct seq_file *seq = file->private_data;
 782         struct obd_device *dev = seq->private;
 783         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 784
 785         memset(stats, 0, sizeof(*stats));
 786         return len;
 787 }
 788
 789 LPROC_SEQ_FOPS(osc_stats);
 790
 791 int lproc_osc_attach_seqstat(struct obd_device *dev)
 792 {
 793         int rc;
 794
 795         rc = ldebugfs_seq_create(dev->obd_debugfs_entry, "osc_stats", 0644,
 796                                  &osc_stats_fops, dev);
 797         if (rc == 0)
 798                 rc = ldebugfs_obd_seq_create(dev, "rpc_stats", 0644,
 799                                              &osc_rpc_stats_fops, dev);
 800
 801         return rc;
 802 }
 803
 804 static struct attribute *osc_attrs[] = {
 805         &lustre_attr_active.attr,
 806         &lustre_attr_checksums.attr,
 807         &lustre_attr_contention_seconds.attr,
 808         &lustre_attr_cur_dirty_bytes.attr,
 809         &lustre_attr_cur_grant_bytes.attr,
 810         &lustre_attr_cur_lost_grant_bytes.attr,
 811         &lustre_attr_destroys_in_flight.attr,
 812         &lustre_attr_grant_shrink_interval.attr,
 813         &lustre_attr_lockless_truncate.attr,
 814         &lustre_attr_max_dirty_mb.attr,
 815         &lustre_attr_max_pages_per_rpc.attr,
 816         &lustre_attr_max_rpcs_in_flight.attr,
 817         &lustre_attr_resend_count.attr,
 818         &lustre_attr_unstable_stats.attr,
 819         NULL,
 820 };
 821
 822 static struct attribute_group osc_attr_group = {
 823         .attrs = osc_attrs,
 824 };
 825
 826 void lprocfs_osc_init_vars(struct lprocfs_static_vars *lvars)
 827 {
 828         lvars->sysfs_vars  = &osc_attr_group;
 829         lvars->obd_vars    = lprocfs_osc_obd_vars;
 830 }