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         client_adjust_max_dirty(cli);
 123         spin_unlock(&cli->cl_loi_list_lock);
 124
 125         return count;
 126 }
 127 LUSTRE_RW_ATTR(max_rpcs_in_flight);
 128
 129 static ssize_t max_dirty_mb_show(struct kobject *kobj,
 130                                  struct attribute *attr,
 131                                  char *buf)
 132 {
 133         struct obd_device *dev = container_of(kobj, struct obd_device,
 134                                               obd_kobj);
 135         struct client_obd *cli = &dev->u.cli;
 136         long val;
 137         int mult;
 138
 139         spin_lock(&cli->cl_loi_list_lock);
 140         val = cli->cl_dirty_max_pages;
 141         spin_unlock(&cli->cl_loi_list_lock);
 142
 143         mult = 1 << (20 - PAGE_SHIFT);
 144         return lprocfs_read_frac_helper(buf, PAGE_SIZE, val, mult);
 145 }
 146
 147 static ssize_t max_dirty_mb_store(struct kobject *kobj,
 148                                   struct attribute *attr,
 149                                   const char *buffer,
 150                                   size_t count)
 151 {
 152         struct obd_device *dev = container_of(kobj, struct obd_device,
 153                                               obd_kobj);
 154         struct client_obd *cli = &dev->u.cli;
 155         int rc;
 156         unsigned long pages_number;
 157
 158         rc = kstrtoul(buffer, 10, &pages_number);
 159         if (rc)
 160                 return rc;
 161
 162         pages_number *= 1 << (20 - PAGE_SHIFT); /* MB -> pages */
 163
 164         if (pages_number <= 0 ||
 165             pages_number > OSC_MAX_DIRTY_MB_MAX << (20 - PAGE_SHIFT) ||
 166             pages_number > totalram_pages / 4) /* 1/4 of RAM */
 167                 return -ERANGE;
 168
 169         spin_lock(&cli->cl_loi_list_lock);
 170         cli->cl_dirty_max_pages = pages_number;
 171         osc_wake_cache_waiters(cli);
 172         spin_unlock(&cli->cl_loi_list_lock);
 173
 174         return count;
 175 }
 176 LUSTRE_RW_ATTR(max_dirty_mb);
 177
 178 static int osc_cached_mb_seq_show(struct seq_file *m, void *v)
 179 {
 180         struct obd_device *dev = m->private;
 181         struct client_obd *cli = &dev->u.cli;
 182         int shift = 20 - PAGE_SHIFT;
 183
 184         seq_printf(m,
 185                    "used_mb: %ld\n"
 186                    "busy_cnt: %ld\n",
 187                    (atomic_long_read(&cli->cl_lru_in_list) +
 188                     atomic_long_read(&cli->cl_lru_busy)) >> shift,
 189                    atomic_long_read(&cli->cl_lru_busy));
 190
 191         return 0;
 192 }
 193
 194 /* shrink the number of caching pages to a specific number */
 195 static ssize_t osc_cached_mb_seq_write(struct file *file,
 196                                        const char __user *buffer,
 197                                        size_t count, loff_t *off)
 198 {
 199         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
 200         struct client_obd *cli = &dev->u.cli;
 201         long pages_number, rc;
 202         char kernbuf[128];
 203         int mult;
 204         u64 val;
 205
 206         if (count >= sizeof(kernbuf))
 207                 return -EINVAL;
 208
 209         if (copy_from_user(kernbuf, buffer, count))
 210                 return -EFAULT;
 211         kernbuf[count] = 0;
 212
 213         mult = 1 << (20 - PAGE_SHIFT);
 214         buffer += lprocfs_find_named_value(kernbuf, "used_mb:", &count) -
 215                   kernbuf;
 216         rc = lprocfs_write_frac_u64_helper(buffer, count, &val, mult);
 217         if (rc)
 218                 return rc;
 219
 220         if (val > LONG_MAX)
 221                 return -ERANGE;
 222         pages_number = (long)val;
 223
 224         if (pages_number < 0)
 225                 return -ERANGE;
 226
 227         rc = atomic_long_read(&cli->cl_lru_in_list) - pages_number;
 228         if (rc > 0) {
 229                 struct lu_env *env;
 230                 int refcheck;
 231
 232                 env = cl_env_get(&refcheck);
 233                 if (!IS_ERR(env)) {
 234                         (void)osc_lru_shrink(env, cli, rc, true);
 235                         cl_env_put(env, &refcheck);
 236                 }
 237         }
 238
 239         return count;
 240 }
 241
 242 LPROC_SEQ_FOPS(osc_cached_mb);
 243
 244 static ssize_t cur_dirty_bytes_show(struct kobject *kobj,
 245                                     struct attribute *attr,
 246                                     char *buf)
 247 {
 248         struct obd_device *dev = container_of(kobj, struct obd_device,
 249                                               obd_kobj);
 250         struct client_obd *cli = &dev->u.cli;
 251         int len;
 252
 253         spin_lock(&cli->cl_loi_list_lock);
 254         len = sprintf(buf, "%lu\n", cli->cl_dirty_pages << PAGE_SHIFT);
 255         spin_unlock(&cli->cl_loi_list_lock);
 256
 257         return len;
 258 }
 259 LUSTRE_RO_ATTR(cur_dirty_bytes);
 260
 261 static ssize_t cur_grant_bytes_show(struct kobject *kobj,
 262                                     struct attribute *attr,
 263                                     char *buf)
 264 {
 265         struct obd_device *dev = container_of(kobj, struct obd_device,
 266                                               obd_kobj);
 267         struct client_obd *cli = &dev->u.cli;
 268         int len;
 269
 270         spin_lock(&cli->cl_loi_list_lock);
 271         len = sprintf(buf, "%lu\n", cli->cl_avail_grant);
 272         spin_unlock(&cli->cl_loi_list_lock);
 273
 274         return len;
 275 }
 276
 277 static ssize_t cur_grant_bytes_store(struct kobject *kobj,
 278                                      struct attribute *attr,
 279                                      const char *buffer,
 280                                      size_t count)
 281 {
 282         struct obd_device *obd = container_of(kobj, struct obd_device,
 283                                               obd_kobj);
 284         struct client_obd *cli = &obd->u.cli;
 285         int rc;
 286         unsigned long long val;
 287
 288         rc = kstrtoull(buffer, 10, &val);
 289         if (rc)
 290                 return rc;
 291
 292         /* this is only for shrinking grant */
 293         spin_lock(&cli->cl_loi_list_lock);
 294         if (val >= cli->cl_avail_grant) {
 295                 spin_unlock(&cli->cl_loi_list_lock);
 296                 return -EINVAL;
 297         }
 298         spin_unlock(&cli->cl_loi_list_lock);
 299
 300         if (cli->cl_import->imp_state == LUSTRE_IMP_FULL)
 301                 rc = osc_shrink_grant_to_target(cli, val);
 302         if (rc)
 303                 return rc;
 304         return count;
 305 }
 306 LUSTRE_RW_ATTR(cur_grant_bytes);
 307
 308 static ssize_t cur_lost_grant_bytes_show(struct kobject *kobj,
 309                                          struct attribute *attr,
 310                                          char *buf)
 311 {
 312         struct obd_device *dev = container_of(kobj, struct obd_device,
 313                                               obd_kobj);
 314         struct client_obd *cli = &dev->u.cli;
 315         int len;
 316
 317         spin_lock(&cli->cl_loi_list_lock);
 318         len = sprintf(buf, "%lu\n", cli->cl_lost_grant);
 319         spin_unlock(&cli->cl_loi_list_lock);
 320
 321         return len;
 322 }
 323 LUSTRE_RO_ATTR(cur_lost_grant_bytes);
 324
 325 static ssize_t grant_shrink_interval_show(struct kobject *kobj,
 326                                           struct attribute *attr,
 327                                           char *buf)
 328 {
 329         struct obd_device *obd = container_of(kobj, struct obd_device,
 330                                               obd_kobj);
 331
 332         return sprintf(buf, "%d\n", obd->u.cli.cl_grant_shrink_interval);
 333 }
 334
 335 static ssize_t grant_shrink_interval_store(struct kobject *kobj,
 336                                            struct attribute *attr,
 337                                            const char *buffer,
 338                                            size_t count)
 339 {
 340         struct obd_device *obd = container_of(kobj, struct obd_device,
 341                                               obd_kobj);
 342         int rc;
 343         unsigned long val;
 344
 345         rc = kstrtoul(buffer, 10, &val);
 346         if (rc)
 347                 return rc;
 348
 349         if (val <= 0)
 350                 return -ERANGE;
 351
 352         obd->u.cli.cl_grant_shrink_interval = val;
 353
 354         return count;
 355 }
 356 LUSTRE_RW_ATTR(grant_shrink_interval);
 357
 358 static ssize_t checksums_show(struct kobject *kobj,
 359                               struct attribute *attr,
 360                               char *buf)
 361 {
 362         struct obd_device *obd = container_of(kobj, struct obd_device,
 363                                               obd_kobj);
 364
 365         return sprintf(buf, "%d\n", obd->u.cli.cl_checksum ? 1 : 0);
 366 }
 367
 368 static ssize_t checksums_store(struct kobject *kobj,
 369                                struct attribute *attr,
 370                                const char *buffer,
 371                                size_t count)
 372 {
 373         struct obd_device *obd = container_of(kobj, struct obd_device,
 374                                               obd_kobj);
 375         int rc;
 376         unsigned long val;
 377
 378         rc = kstrtoul(buffer, 10, &val);
 379         if (rc)
 380                 return rc;
 381
 382         obd->u.cli.cl_checksum = (val ? 1 : 0);
 383
 384         return count;
 385 }
 386 LUSTRE_RW_ATTR(checksums);
 387
 388 static int osc_checksum_type_seq_show(struct seq_file *m, void *v)
 389 {
 390         struct obd_device *obd = m->private;
 391         int i;
 392
 393         DECLARE_CKSUM_NAME;
 394
 395         if (!obd)
 396                 return 0;
 397
 398         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 399                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 400                         continue;
 401                 if (obd->u.cli.cl_cksum_type == (1 << i))
 402                         seq_printf(m, "[%s] ", cksum_name[i]);
 403                 else
 404                         seq_printf(m, "%s ", cksum_name[i]);
 405         }
 406         seq_putc(m, '\n');
 407         return 0;
 408 }
 409
 410 static ssize_t osc_checksum_type_seq_write(struct file *file,
 411                                            const char __user *buffer,
 412                                            size_t count, loff_t *off)
 413 {
 414         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 415         int i;
 416
 417         DECLARE_CKSUM_NAME;
 418         char kernbuf[10];
 419
 420         if (!obd)
 421                 return 0;
 422
 423         if (count > sizeof(kernbuf) - 1)
 424                 return -EINVAL;
 425         if (copy_from_user(kernbuf, buffer, count))
 426                 return -EFAULT;
 427         if (count > 0 && kernbuf[count - 1] == '\n')
 428                 kernbuf[count - 1] = '\0';
 429         else
 430                 kernbuf[count] = '\0';
 431
 432         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 433                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 434                         continue;
 435                 if (!strcmp(kernbuf, cksum_name[i])) {
 436                         obd->u.cli.cl_cksum_type = 1 << i;
 437                         return count;
 438                 }
 439         }
 440         return -EINVAL;
 441 }
 442
 443 LPROC_SEQ_FOPS(osc_checksum_type);
 444
 445 static ssize_t resend_count_show(struct kobject *kobj,
 446                                  struct attribute *attr,
 447                                  char *buf)
 448 {
 449         struct obd_device *obd = container_of(kobj, struct obd_device,
 450                                               obd_kobj);
 451
 452         return sprintf(buf, "%u\n", atomic_read(&obd->u.cli.cl_resends));
 453 }
 454
 455 static ssize_t resend_count_store(struct kobject *kobj,
 456                                   struct attribute *attr,
 457                                   const char *buffer,
 458                                   size_t count)
 459 {
 460         struct obd_device *obd = container_of(kobj, struct obd_device,
 461                                               obd_kobj);
 462         int rc;
 463         unsigned long val;
 464
 465         rc = kstrtoul(buffer, 10, &val);
 466         if (rc)
 467                 return rc;
 468
 469         atomic_set(&obd->u.cli.cl_resends, val);
 470
 471         return count;
 472 }
 473 LUSTRE_RW_ATTR(resend_count);
 474
 475 static ssize_t contention_seconds_show(struct kobject *kobj,
 476                                        struct attribute *attr,
 477                                        char *buf)
 478 {
 479         struct obd_device *obd = container_of(kobj, struct obd_device,
 480                                               obd_kobj);
 481         struct osc_device *od  = obd2osc_dev(obd);
 482
 483         return sprintf(buf, "%u\n", od->od_contention_time);
 484 }
 485
 486 static ssize_t contention_seconds_store(struct kobject *kobj,
 487                                         struct attribute *attr,
 488                                         const char *buffer,
 489                                         size_t count)
 490 {
 491         struct obd_device *obd = container_of(kobj, struct obd_device,
 492                                               obd_kobj);
 493         struct osc_device *od  = obd2osc_dev(obd);
 494         int rc;
 495         int val;
 496
 497         rc = kstrtoint(buffer, 10, &val);
 498         if (rc)
 499                 return rc;
 500
 501         if (val < 0)
 502                 return -EINVAL;
 503
 504         od->od_contention_time = val;
 505
 506         return count;
 507 }
 508 LUSTRE_RW_ATTR(contention_seconds);
 509
 510 static ssize_t lockless_truncate_show(struct kobject *kobj,
 511                                       struct attribute *attr,
 512                                       char *buf)
 513 {
 514         struct obd_device *obd = container_of(kobj, struct obd_device,
 515                                               obd_kobj);
 516         struct osc_device *od  = obd2osc_dev(obd);
 517
 518         return sprintf(buf, "%u\n", od->od_lockless_truncate);
 519 }
 520
 521 static ssize_t lockless_truncate_store(struct kobject *kobj,
 522                                        struct attribute *attr,
 523                                        const char *buffer,
 524                                        size_t count)
 525 {
 526         struct obd_device *obd = container_of(kobj, struct obd_device,
 527                                               obd_kobj);
 528         struct osc_device *od  = obd2osc_dev(obd);
 529         int rc;
 530         unsigned int val;
 531
 532         rc = kstrtouint(buffer, 10, &val);
 533         if (rc)
 534                 return rc;
 535
 536         od->od_lockless_truncate = val;
 537
 538         return count;
 539 }
 540 LUSTRE_RW_ATTR(lockless_truncate);
 541
 542 static ssize_t destroys_in_flight_show(struct kobject *kobj,
 543                                        struct attribute *attr,
 544                                        char *buf)
 545 {
 546         struct obd_device *obd = container_of(kobj, struct obd_device,
 547                                               obd_kobj);
 548
 549         return sprintf(buf, "%u\n",
 550                        atomic_read(&obd->u.cli.cl_destroy_in_flight));
 551 }
 552 LUSTRE_RO_ATTR(destroys_in_flight);
 553
 554 static ssize_t max_pages_per_rpc_show(struct kobject *kobj,
 555                                       struct attribute *attr,
 556                                       char *buf)
 557 {
 558         struct obd_device *dev = container_of(kobj, struct obd_device,
 559                                               obd_kobj);
 560         struct client_obd *cli = &dev->u.cli;
 561
 562         return sprintf(buf, "%d\n", cli->cl_max_pages_per_rpc);
 563 }
 564
 565 static ssize_t max_pages_per_rpc_store(struct kobject *kobj,
 566                                        struct attribute *attr,
 567                                        const char *buffer,
 568                                        size_t count)
 569 {
 570         struct obd_device *dev = container_of(kobj, struct obd_device,
 571                                               obd_kobj);
 572         struct client_obd *cli = &dev->u.cli;
 573         struct obd_connect_data *ocd = &cli->cl_import->imp_connect_data;
 574         int chunk_mask, rc;
 575         unsigned long long val;
 576
 577         rc = kstrtoull(buffer, 10, &val);
 578         if (rc)
 579                 return rc;
 580
 581         /* if the max_pages is specified in bytes, convert to pages */
 582         if (val >= ONE_MB_BRW_SIZE)
 583                 val >>= PAGE_SHIFT;
 584
 585         chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_SHIFT)) - 1);
 586         /* max_pages_per_rpc must be chunk aligned */
 587         val = (val + ~chunk_mask) & chunk_mask;
 588         if (val == 0 || val > ocd->ocd_brw_size >> PAGE_SHIFT) {
 589                 return -ERANGE;
 590         }
 591         spin_lock(&cli->cl_loi_list_lock);
 592         cli->cl_max_pages_per_rpc = val;
 593         client_adjust_max_dirty(cli);
 594         spin_unlock(&cli->cl_loi_list_lock);
 595
 596         return count;
 597 }
 598 LUSTRE_RW_ATTR(max_pages_per_rpc);
 599
 600 static ssize_t unstable_stats_show(struct kobject *kobj,
 601                                    struct attribute *attr,
 602                                    char *buf)
 603 {
 604         struct obd_device *dev = container_of(kobj, struct obd_device,
 605                                               obd_kobj);
 606         struct client_obd *cli = &dev->u.cli;
 607         long pages;
 608         int mb;
 609
 610         pages = atomic_long_read(&cli->cl_unstable_count);
 611         mb = (pages * PAGE_SIZE) >> 20;
 612
 613         return sprintf(buf, "unstable_pages: %20ld\n"
 614                        "unstable_mb:              %10d\n", pages, mb);
 615 }
 616 LUSTRE_RO_ATTR(unstable_stats);
 617
 618 LPROC_SEQ_FOPS_RO_TYPE(osc, connect_flags);
 619 LPROC_SEQ_FOPS_RO_TYPE(osc, server_uuid);
 620 LPROC_SEQ_FOPS_RO_TYPE(osc, conn_uuid);
 621 LPROC_SEQ_FOPS_RO_TYPE(osc, timeouts);
 622 LPROC_SEQ_FOPS_RO_TYPE(osc, state);
 623
 624 LPROC_SEQ_FOPS_WR_ONLY(osc, ping);
 625
 626 LPROC_SEQ_FOPS_RW_TYPE(osc, import);
 627 LPROC_SEQ_FOPS_RW_TYPE(osc, pinger_recov);
 628
 629 static struct lprocfs_vars lprocfs_osc_obd_vars[] = {
 630         { "ping",            &osc_ping_fops,    NULL, 0222 },
 631         { "connect_flags",   &osc_connect_flags_fops, NULL, 0 },
 632         /*{ "filegroups",      lprocfs_rd_filegroups,  NULL, 0 },*/
 633         { "ost_server_uuid", &osc_server_uuid_fops, NULL, 0 },
 634         { "ost_conn_uuid",   &osc_conn_uuid_fops, NULL, 0 },
 635         { "osc_cached_mb",   &osc_cached_mb_fops, NULL },
 636         { "checksum_type",   &osc_checksum_type_fops, NULL },
 637         { "timeouts",        &osc_timeouts_fops, NULL, 0 },
 638         { "import",             &osc_import_fops, NULL },
 639         { "state",              &osc_state_fops, NULL, 0 },
 640         { "pinger_recov",       &osc_pinger_recov_fops, NULL },
 641         { NULL }
 642 };
 643
 644 #define pct(a, b) (b ? a * 100 / b : 0)
 645
 646 static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 647 {
 648         struct timespec64 now;
 649         struct obd_device *dev = seq->private;
 650         struct client_obd *cli = &dev->u.cli;
 651         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 652         int i;
 653
 654         ktime_get_real_ts64(&now);
 655
 656         spin_lock(&cli->cl_loi_list_lock);
 657
 658         seq_printf(seq, "snapshot_time:  %llu.%9lu (secs.usecs)\n",
 659                    (s64)now.tv_sec, (unsigned long)now.tv_nsec);
 660         seq_printf(seq, "read RPCs in flight:  %d\n",
 661                    cli->cl_r_in_flight);
 662         seq_printf(seq, "write RPCs in flight: %d\n",
 663                    cli->cl_w_in_flight);
 664         seq_printf(seq, "pending write pages:  %d\n",
 665                    atomic_read(&cli->cl_pending_w_pages));
 666         seq_printf(seq, "pending read pages:   %d\n",
 667                    atomic_read(&cli->cl_pending_r_pages));
 668
 669         seq_puts(seq, "\n\t\t\tread\t\t\twrite\n");
 670         seq_puts(seq, "pages per rpc     rpcs   % cum % |");
 671         seq_puts(seq, "       rpcs   % cum %\n");
 672
 673         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 674         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 675
 676         read_cum = 0;
 677         write_cum = 0;
 678         for (i = 0; i < OBD_HIST_MAX; i++) {
 679                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 680                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 681
 682                 read_cum += r;
 683                 write_cum += w;
 684                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 685                            1 << i, r, pct(r, read_tot),
 686                            pct(read_cum, read_tot), w,
 687                            pct(w, write_tot),
 688                            pct(write_cum, write_tot));
 689                 if (read_cum == read_tot && write_cum == write_tot)
 690                         break;
 691         }
 692
 693         seq_puts(seq, "\n\t\t\tread\t\t\twrite\n");
 694         seq_puts(seq, "rpcs in flight   rpcs   % cum % |");
 695         seq_puts(seq, "       rpcs   % cum %\n");
 696
 697         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 698         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
 699
 700         read_cum = 0;
 701         write_cum = 0;
 702         for (i = 0; i < OBD_HIST_MAX; i++) {
 703                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
 704                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
 705
 706                 read_cum += r;
 707                 write_cum += w;
 708                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 709                            i, r, pct(r, read_tot),
 710                            pct(read_cum, read_tot), w,
 711                            pct(w, write_tot),
 712                            pct(write_cum, write_tot));
 713                 if (read_cum == read_tot && write_cum == write_tot)
 714                         break;
 715         }
 716
 717         seq_puts(seq, "\n\t\t\tread\t\t\twrite\n");
 718         seq_puts(seq, "offset           rpcs   % cum % |");
 719         seq_puts(seq, "       rpcs   % cum %\n");
 720
 721         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
 722         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist);
 723
 724         read_cum = 0;
 725         write_cum = 0;
 726         for (i = 0; i < OBD_HIST_MAX; i++) {
 727                 unsigned long r = cli->cl_read_offset_hist.oh_buckets[i];
 728                 unsigned long w = cli->cl_write_offset_hist.oh_buckets[i];
 729
 730                 read_cum += r;
 731                 write_cum += w;
 732                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 733                            (i == 0) ? 0 : 1 << (i - 1),
 734                            r, pct(r, read_tot), pct(read_cum, read_tot),
 735                            w, pct(w, write_tot), pct(write_cum, write_tot));
 736                 if (read_cum == read_tot && write_cum == write_tot)
 737                         break;
 738         }
 739
 740         spin_unlock(&cli->cl_loi_list_lock);
 741
 742         return 0;
 743 }
 744
 745 #undef pct
 746
 747 static ssize_t osc_rpc_stats_seq_write(struct file *file,
 748                                        const char __user *buf,
 749                                        size_t len, loff_t *off)
 750 {
 751         struct seq_file *seq = file->private_data;
 752         struct obd_device *dev = seq->private;
 753         struct client_obd *cli = &dev->u.cli;
 754
 755         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 756         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 757         lprocfs_oh_clear(&cli->cl_read_page_hist);
 758         lprocfs_oh_clear(&cli->cl_write_page_hist);
 759         lprocfs_oh_clear(&cli->cl_read_offset_hist);
 760         lprocfs_oh_clear(&cli->cl_write_offset_hist);
 761
 762         return len;
 763 }
 764
 765 LPROC_SEQ_FOPS(osc_rpc_stats);
 766
 767 static int osc_stats_seq_show(struct seq_file *seq, void *v)
 768 {
 769         struct timespec64 now;
 770         struct obd_device *dev = seq->private;
 771         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 772
 773         ktime_get_real_ts64(&now);
 774
 775         seq_printf(seq, "snapshot_time:  %llu.%9lu (secs.usecs)\n",
 776                    (s64)now.tv_sec, (unsigned long)now.tv_nsec);
 777         seq_printf(seq, "lockless_write_bytes\t\t%llu\n",
 778                    stats->os_lockless_writes);
 779         seq_printf(seq, "lockless_read_bytes\t\t%llu\n",
 780                    stats->os_lockless_reads);
 781         seq_printf(seq, "lockless_truncate\t\t%llu\n",
 782                    stats->os_lockless_truncates);
 783         return 0;
 784 }
 785
 786 static ssize_t osc_stats_seq_write(struct file *file,
 787                                    const char __user *buf,
 788                                    size_t len, loff_t *off)
 789 {
 790         struct seq_file *seq = file->private_data;
 791         struct obd_device *dev = seq->private;
 792         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 793
 794         memset(stats, 0, sizeof(*stats));
 795         return len;
 796 }
 797
 798 LPROC_SEQ_FOPS(osc_stats);
 799
 800 int lproc_osc_attach_seqstat(struct obd_device *dev)
 801 {
 802         int rc;
 803
 804         rc = ldebugfs_seq_create(dev->obd_debugfs_entry, "osc_stats", 0644,
 805                                  &osc_stats_fops, dev);
 806         if (rc == 0)
 807                 rc = ldebugfs_obd_seq_create(dev, "rpc_stats", 0644,
 808                                              &osc_rpc_stats_fops, dev);
 809
 810         return rc;
 811 }
 812
 813 static struct attribute *osc_attrs[] = {
 814         &lustre_attr_active.attr,
 815         &lustre_attr_checksums.attr,
 816         &lustre_attr_contention_seconds.attr,
 817         &lustre_attr_cur_dirty_bytes.attr,
 818         &lustre_attr_cur_grant_bytes.attr,
 819         &lustre_attr_cur_lost_grant_bytes.attr,
 820         &lustre_attr_destroys_in_flight.attr,
 821         &lustre_attr_grant_shrink_interval.attr,
 822         &lustre_attr_lockless_truncate.attr,
 823         &lustre_attr_max_dirty_mb.attr,
 824         &lustre_attr_max_pages_per_rpc.attr,
 825         &lustre_attr_max_rpcs_in_flight.attr,
 826         &lustre_attr_resend_count.attr,
 827         &lustre_attr_unstable_stats.attr,
 828         NULL,
 829 };
 830
 831 static struct attribute_group osc_attr_group = {
 832         .attrs = osc_attrs,
 833 };
 834
 835 void lprocfs_osc_init_vars(struct lprocfs_static_vars *lvars)
 836 {
 837         lvars->sysfs_vars  = &osc_attr_group;
 838         lvars->obd_vars    = lprocfs_osc_obd_vars;
 839 }