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/version.h>
  35 #include <asm/statfs.h>
  36 #include <obd_cksum.h>
  37 #include <obd_class.h>
  38 #include <lprocfs_status.h>
  39 #include <linux/seq_file.h>
  40 #include "osc_internal.h"
  41
  42 #ifdef CONFIG_PROC_FS
  43 static int osc_active_seq_show(struct seq_file *m, void *v)
  44 {
  45         struct obd_device *dev = m->private;
  46
  47         LPROCFS_CLIMP_CHECK(dev);
  48         seq_printf(m, "%d\n", !dev->u.cli.cl_import->imp_deactive);
  49         LPROCFS_CLIMP_EXIT(dev);
  50         return 0;
  51 }
  52
  53 static ssize_t osc_active_seq_write(struct file *file,
  54                                     const char __user *buffer,
  55                                     size_t count, loff_t *off)
  56 {
  57         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
  58         int rc;
  59         __s64 val;
  60
  61         rc = lprocfs_str_to_s64(buffer, count, &val);
  62         if (rc)
  63                 return rc;
  64         if (val < 0 || val > 1)
  65                 return -ERANGE;
  66
  67         /* opposite senses */
  68         if (dev->u.cli.cl_import->imp_deactive == val)
  69                 rc = ptlrpc_set_import_active(dev->u.cli.cl_import, val);
  70         else
  71                 CDEBUG(D_CONFIG, "activate %d: ignoring repeat request\n",
  72                         (int)val);
  73
  74         return count;
  75 }
  76 LPROC_SEQ_FOPS(osc_active);
  77
  78 static int osc_max_rpcs_in_flight_seq_show(struct seq_file *m, void *v)
  79 {
  80         struct obd_device *dev = m->private;
  81         struct client_obd *cli = &dev->u.cli;
  82
  83         spin_lock(&cli->cl_loi_list_lock);
  84         seq_printf(m, "%u\n", cli->cl_max_rpcs_in_flight);
  85         spin_unlock(&cli->cl_loi_list_lock);
  86         return 0;
  87 }
  88
  89 static ssize_t osc_max_rpcs_in_flight_seq_write(struct file *file,
  90                                                 const char __user *buffer,
  91                                                 size_t count, loff_t *off)
  92 {
  93         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
  94         struct client_obd *cli = &dev->u.cli;
  95         int rc;
  96         int adding, added, req_count;
  97         __s64 val;
  98
  99         rc = lprocfs_str_to_s64(buffer, count, &val);
 100         if (rc)
 101                 return rc;
 102         if (val < 1 || val > OSC_MAX_RIF_MAX)
 103                 return -ERANGE;
 104
 105         LPROCFS_CLIMP_CHECK(dev);
 106
 107         adding = (int)val - cli->cl_max_rpcs_in_flight;
 108         req_count = atomic_read(&osc_pool_req_count);
 109         if (adding > 0 && req_count < osc_reqpool_maxreqcount) {
 110                 /*
 111                  * There might be some race which will cause over-limit
 112                  * allocation, but it is fine.
 113                  */
 114                 if (req_count + adding > osc_reqpool_maxreqcount)
 115                         adding = osc_reqpool_maxreqcount - req_count;
 116
 117                 added = osc_rq_pool->prp_populate(osc_rq_pool, adding);
 118                 atomic_add(added, &osc_pool_req_count);
 119         }
 120
 121         spin_lock(&cli->cl_loi_list_lock);
 122         cli->cl_max_rpcs_in_flight = val;
 123         client_adjust_max_dirty(cli);
 124         spin_unlock(&cli->cl_loi_list_lock);
 125
 126         LPROCFS_CLIMP_EXIT(dev);
 127         return count;
 128 }
 129 LPROC_SEQ_FOPS(osc_max_rpcs_in_flight);
 130
 131 static int osc_max_dirty_mb_seq_show(struct seq_file *m, void *v)
 132 {
 133         struct obd_device *dev = m->private;
 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_pages;
 140         spin_unlock(&cli->cl_loi_list_lock);
 141
 142         mult = 1 << (20 - PAGE_SHIFT);
 143         return lprocfs_seq_read_frac_helper(m, val, mult);
 144 }
 145
 146 static ssize_t osc_max_dirty_mb_seq_write(struct file *file,
 147                                           const char __user *buffer,
 148                                           size_t count, loff_t *off)
 149 {
 150         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
 151         struct client_obd *cli = &dev->u.cli;
 152         int rc;
 153         __s64 pages_number;
 154
 155         rc = lprocfs_str_with_units_to_s64(buffer, count, &pages_number, 'M');
 156         if (rc)
 157                 return rc;
 158
 159         pages_number >>= PAGE_SHIFT;
 160
 161         if (pages_number <= 0 ||
 162             pages_number >= OSC_MAX_DIRTY_MB_MAX << (20 - PAGE_SHIFT) ||
 163             pages_number > totalram_pages / 4) /* 1/4 of RAM */
 164                 return -ERANGE;
 165
 166         spin_lock(&cli->cl_loi_list_lock);
 167         cli->cl_dirty_max_pages = pages_number;
 168         osc_wake_cache_waiters(cli);
 169         spin_unlock(&cli->cl_loi_list_lock);
 170
 171         return count;
 172 }
 173 LPROC_SEQ_FOPS(osc_max_dirty_mb);
 174
 175 static int osc_cached_mb_seq_show(struct seq_file *m, void *v)
 176 {
 177         struct obd_device *dev = m->private;
 178         struct client_obd *cli = &dev->u.cli;
 179         int shift = 20 - PAGE_SHIFT;
 180
 181         seq_printf(m, "used_mb: %ld\n"
 182                    "busy_cnt: %ld\n"
 183                    "reclaim: %llu\n",
 184                    (atomic_long_read(&cli->cl_lru_in_list) +
 185                     atomic_long_read(&cli->cl_lru_busy)) >> shift,
 186                     atomic_long_read(&cli->cl_lru_busy),
 187                    cli->cl_lru_reclaim);
 188
 189         return 0;
 190 }
 191
 192 /* shrink the number of caching pages to a specific number */
 193 static ssize_t
 194 osc_cached_mb_seq_write(struct file *file, const char __user *buffer,
 195                         size_t count, loff_t *off)
 196 {
 197         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
 198         struct client_obd *cli = &dev->u.cli;
 199         __s64 pages_number;
 200         long 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         buffer += lprocfs_find_named_value(kernbuf, "used_mb:", &count) -
 211                   kernbuf;
 212         rc = lprocfs_str_with_units_to_s64(buffer, count, &pages_number, 'M');
 213         if (rc)
 214                 return rc;
 215
 216         pages_number >>= PAGE_SHIFT;
 217
 218         if (pages_number < 0)
 219                 return -ERANGE;
 220
 221         rc = atomic_long_read(&cli->cl_lru_in_list) - pages_number;
 222         if (rc > 0) {
 223                 struct lu_env *env;
 224                 __u16 refcheck;
 225
 226                 env = cl_env_get(&refcheck);
 227                 if (!IS_ERR(env)) {
 228                         (void)osc_lru_shrink(env, cli, rc, true);
 229                         cl_env_put(env, &refcheck);
 230                 }
 231         }
 232
 233         return count;
 234 }
 235 LPROC_SEQ_FOPS(osc_cached_mb);
 236
 237 static int osc_cur_dirty_bytes_seq_show(struct seq_file *m, void *v)
 238 {
 239         struct obd_device *dev = m->private;
 240         struct client_obd *cli = &dev->u.cli;
 241
 242         spin_lock(&cli->cl_loi_list_lock);
 243         seq_printf(m, "%lu\n", cli->cl_dirty_pages << PAGE_SHIFT);
 244         spin_unlock(&cli->cl_loi_list_lock);
 245         return 0;
 246 }
 247 LPROC_SEQ_FOPS_RO(osc_cur_dirty_bytes);
 248
 249 static int osc_cur_grant_bytes_seq_show(struct seq_file *m, void *v)
 250 {
 251         struct obd_device *dev = m->private;
 252         struct client_obd *cli = &dev->u.cli;
 253
 254         spin_lock(&cli->cl_loi_list_lock);
 255         seq_printf(m, "%lu\n", cli->cl_avail_grant);
 256         spin_unlock(&cli->cl_loi_list_lock);
 257         return 0;
 258 }
 259
 260 static ssize_t osc_cur_grant_bytes_seq_write(struct file *file,
 261                                              const char __user *buffer,
 262                                              size_t count, loff_t *off)
 263 {
 264         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 265         struct client_obd *cli = &obd->u.cli;
 266         int                rc;
 267         __s64              val;
 268
 269         if (obd == NULL)
 270                 return 0;
 271
 272         rc = lprocfs_str_with_units_to_s64(buffer, count, &val, '1');
 273         if (rc)
 274                 return rc;
 275         if (val < 0)
 276                 return -ERANGE;
 277
 278         /* this is only for shrinking grant */
 279         spin_lock(&cli->cl_loi_list_lock);
 280         if (val >= cli->cl_avail_grant) {
 281                 spin_unlock(&cli->cl_loi_list_lock);
 282                 return 0;
 283         }
 284
 285         spin_unlock(&cli->cl_loi_list_lock);
 286
 287         LPROCFS_CLIMP_CHECK(obd);
 288         if (cli->cl_import->imp_state == LUSTRE_IMP_FULL)
 289                 rc = osc_shrink_grant_to_target(cli, val);
 290         LPROCFS_CLIMP_EXIT(obd);
 291         if (rc)
 292                 return rc;
 293         return count;
 294 }
 295 LPROC_SEQ_FOPS(osc_cur_grant_bytes);
 296
 297 static int osc_cur_lost_grant_bytes_seq_show(struct seq_file *m, void *v)
 298 {
 299         struct obd_device *dev = m->private;
 300         struct client_obd *cli = &dev->u.cli;
 301
 302         spin_lock(&cli->cl_loi_list_lock);
 303         seq_printf(m, "%lu\n", cli->cl_lost_grant);
 304         spin_unlock(&cli->cl_loi_list_lock);
 305         return 0;
 306 }
 307 LPROC_SEQ_FOPS_RO(osc_cur_lost_grant_bytes);
 308
 309 static int osc_cur_dirty_grant_bytes_seq_show(struct seq_file *m, void *v)
 310 {
 311         struct obd_device *dev = m->private;
 312         struct client_obd *cli = &dev->u.cli;
 313
 314         spin_lock(&cli->cl_loi_list_lock);
 315         seq_printf(m, "%lu\n", cli->cl_dirty_grant);
 316         spin_unlock(&cli->cl_loi_list_lock);
 317         return 0;
 318 }
 319 LPROC_SEQ_FOPS_RO(osc_cur_dirty_grant_bytes);
 320
 321 static int osc_grant_shrink_interval_seq_show(struct seq_file *m, void *v)
 322 {
 323         struct obd_device *obd = m->private;
 324
 325         if (obd == NULL)
 326                 return 0;
 327         seq_printf(m, "%d\n",
 328                    obd->u.cli.cl_grant_shrink_interval);
 329         return 0;
 330 }
 331
 332 static ssize_t osc_grant_shrink_interval_seq_write(struct file *file,
 333                                                    const char __user *buffer,
 334                                                    size_t count, loff_t *off)
 335 {
 336         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 337         int rc;
 338         __s64 val;
 339
 340         if (obd == NULL)
 341                 return 0;
 342
 343         rc = lprocfs_str_to_s64(buffer, count, &val);
 344         if (rc)
 345                 return rc;
 346
 347         if (val <= 0 || val > INT_MAX)
 348                 return -ERANGE;
 349
 350         obd->u.cli.cl_grant_shrink_interval = val;
 351
 352         return count;
 353 }
 354 LPROC_SEQ_FOPS(osc_grant_shrink_interval);
 355
 356 static int osc_checksum_seq_show(struct seq_file *m, void *v)
 357 {
 358         struct obd_device *obd = m->private;
 359
 360         if (obd == NULL)
 361                 return 0;
 362
 363         seq_printf(m, "%d\n", obd->u.cli.cl_checksum ? 1 : 0);
 364         return 0;
 365 }
 366
 367 static ssize_t osc_checksum_seq_write(struct file *file,
 368                                       const char __user *buffer,
 369                                       size_t count, loff_t *off)
 370 {
 371         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 372         int rc;
 373         __s64 val;
 374
 375         if (obd == NULL)
 376                 return 0;
 377
 378         rc = lprocfs_str_to_s64(buffer, count, &val);
 379         if (rc)
 380                 return rc;
 381
 382         obd->u.cli.cl_checksum = !!val;
 383
 384         return count;
 385 }
 386 LPROC_SEQ_FOPS(osc_checksum);
 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         DECLARE_CKSUM_NAME;
 393
 394         if (obd == NULL)
 395                 return 0;
 396
 397         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 398                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 399                         continue;
 400                 if (obd->u.cli.cl_cksum_type == (1 << i))
 401                         seq_printf(m, "[%s] ", cksum_name[i]);
 402                 else
 403                         seq_printf(m, "%s ", cksum_name[i]);
 404         }
 405         seq_printf(m, "\n");
 406         return 0;
 407 }
 408
 409 static ssize_t osc_checksum_type_seq_write(struct file *file,
 410                                            const char __user *buffer,
 411                                            size_t count, loff_t *off)
 412 {
 413         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 414         int i;
 415         DECLARE_CKSUM_NAME;
 416         char kernbuf[10];
 417
 418         if (obd == NULL)
 419                 return 0;
 420
 421         if (count > sizeof(kernbuf) - 1)
 422                 return -EINVAL;
 423         if (copy_from_user(kernbuf, buffer, count))
 424                 return -EFAULT;
 425         if (count > 0 && kernbuf[count - 1] == '\n')
 426                 kernbuf[count - 1] = '\0';
 427         else
 428                 kernbuf[count] = '\0';
 429
 430         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 431                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 432                         continue;
 433                 if (!strcmp(kernbuf, cksum_name[i])) {
 434                        obd->u.cli.cl_cksum_type = 1 << i;
 435                        return count;
 436                 }
 437         }
 438         return -EINVAL;
 439 }
 440 LPROC_SEQ_FOPS(osc_checksum_type);
 441
 442 static int osc_resend_count_seq_show(struct seq_file *m, void *v)
 443 {
 444         struct obd_device *obd = m->private;
 445
 446         seq_printf(m, "%u\n", atomic_read(&obd->u.cli.cl_resends));
 447         return 0;
 448 }
 449
 450 static ssize_t osc_resend_count_seq_write(struct file *file,
 451                                           const char __user *buffer,
 452                                           size_t count, loff_t *off)
 453 {
 454         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 455         int rc;
 456         __s64 val;
 457
 458         rc = lprocfs_str_to_s64(buffer, count, &val);
 459         if (rc)
 460                 return rc;
 461
 462         if (val < 0 || val > INT_MAX)
 463                 return -EINVAL;
 464
 465         atomic_set(&obd->u.cli.cl_resends, val);
 466
 467         return count;
 468 }
 469 LPROC_SEQ_FOPS(osc_resend_count);
 470
 471 static int osc_contention_seconds_seq_show(struct seq_file *m, void *v)
 472 {
 473         struct obd_device *obd = m->private;
 474         struct osc_device *od  = obd2osc_dev(obd);
 475
 476         seq_printf(m, "%u\n", od->od_contention_time);
 477         return 0;
 478 }
 479
 480 static ssize_t osc_contention_seconds_seq_write(struct file *file,
 481                                                 const char __user *buffer,
 482                                                 size_t count, loff_t *off)
 483 {
 484         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 485         struct osc_device *od  = obd2osc_dev(obd);
 486         int rc;
 487         __s64 val;
 488
 489         rc = lprocfs_str_to_s64(buffer, count, &val);
 490         if (rc)
 491                 return rc;
 492         if (val < 0 || val > INT_MAX)
 493                 return -ERANGE;
 494
 495         od->od_contention_time = val;
 496
 497         return count;
 498 }
 499 LPROC_SEQ_FOPS(osc_contention_seconds);
 500
 501 static int osc_lockless_truncate_seq_show(struct seq_file *m, void *v)
 502 {
 503         struct obd_device *obd = m->private;
 504         struct osc_device *od  = obd2osc_dev(obd);
 505
 506         seq_printf(m, "%u\n", od->od_lockless_truncate);
 507         return 0;
 508 }
 509
 510 static ssize_t osc_lockless_truncate_seq_write(struct file *file,
 511                                                const char __user *buffer,
 512                                     size_t count, loff_t *off)
 513 {
 514         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 515         struct osc_device *od  = obd2osc_dev(obd);
 516         int rc;
 517         __s64 val;
 518
 519         rc = lprocfs_str_to_s64(buffer, count, &val);
 520         if (rc)
 521                 return rc;
 522         if (val < 0)
 523                 return -ERANGE;
 524
 525         od->od_lockless_truncate = !!val;
 526
 527         return count;
 528 }
 529 LPROC_SEQ_FOPS(osc_lockless_truncate);
 530
 531 static int osc_destroys_in_flight_seq_show(struct seq_file *m, void *v)
 532 {
 533         struct obd_device *obd = m->private;
 534         seq_printf(m, "%u\n",
 535                    atomic_read(&obd->u.cli.cl_destroy_in_flight));
 536         return 0;
 537 }
 538 LPROC_SEQ_FOPS_RO(osc_destroys_in_flight);
 539
 540 static int osc_obd_max_pages_per_rpc_seq_show(struct seq_file *m, void *v)
 541 {
 542         return lprocfs_obd_max_pages_per_rpc_seq_show(m, m->private);
 543 }
 544
 545 static ssize_t osc_obd_max_pages_per_rpc_seq_write(struct file *file,
 546                                                    const char __user *buffer,
 547                                                    size_t count, loff_t *off)
 548 {
 549         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
 550         struct client_obd *cli = &dev->u.cli;
 551         struct obd_connect_data *ocd = &cli->cl_import->imp_connect_data;
 552         int chunk_mask, rc;
 553         __s64 val;
 554
 555         rc = lprocfs_str_with_units_to_s64(buffer, count, &val, '1');
 556         if (rc)
 557                 return rc;
 558         if (val < 0)
 559                 return -ERANGE;
 560
 561         /* if the max_pages is specified in bytes, convert to pages */
 562         if (val >= ONE_MB_BRW_SIZE)
 563                 val >>= PAGE_SHIFT;
 564
 565         LPROCFS_CLIMP_CHECK(dev);
 566
 567         chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_SHIFT)) - 1);
 568         /* max_pages_per_rpc must be chunk aligned */
 569         val = (val + ~chunk_mask) & chunk_mask;
 570         if (val == 0 || (ocd->ocd_brw_size != 0 &&
 571                          val > ocd->ocd_brw_size >> PAGE_SHIFT)) {
 572                 LPROCFS_CLIMP_EXIT(dev);
 573                 return -ERANGE;
 574         }
 575         spin_lock(&cli->cl_loi_list_lock);
 576         cli->cl_max_pages_per_rpc = val;
 577         client_adjust_max_dirty(cli);
 578         spin_unlock(&cli->cl_loi_list_lock);
 579
 580         LPROCFS_CLIMP_EXIT(dev);
 581         return count;
 582 }
 583 LPROC_SEQ_FOPS(osc_obd_max_pages_per_rpc);
 584
 585 static int osc_unstable_stats_seq_show(struct seq_file *m, void *v)
 586 {
 587         struct obd_device *dev = m->private;
 588         struct client_obd *cli = &dev->u.cli;
 589         long pages;
 590         int mb;
 591
 592         pages = atomic_long_read(&cli->cl_unstable_count);
 593         mb    = (pages * PAGE_SIZE) >> 20;
 594
 595         seq_printf(m, "unstable_pages: %20ld\n"
 596                    "unstable_mb:              %10d\n",
 597                    pages, mb);
 598         return 0;
 599 }
 600 LPROC_SEQ_FOPS_RO(osc_unstable_stats);
 601
 602 LPROC_SEQ_FOPS_RO_TYPE(osc, uuid);
 603 LPROC_SEQ_FOPS_RO_TYPE(osc, connect_flags);
 604 LPROC_SEQ_FOPS_RO_TYPE(osc, blksize);
 605 LPROC_SEQ_FOPS_RO_TYPE(osc, kbytestotal);
 606 LPROC_SEQ_FOPS_RO_TYPE(osc, kbytesfree);
 607 LPROC_SEQ_FOPS_RO_TYPE(osc, kbytesavail);
 608 LPROC_SEQ_FOPS_RO_TYPE(osc, filestotal);
 609 LPROC_SEQ_FOPS_RO_TYPE(osc, filesfree);
 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_WO_TYPE(osc, ping);
 616
 617 LPROC_SEQ_FOPS_RW_TYPE(osc, import);
 618 LPROC_SEQ_FOPS_RW_TYPE(osc, pinger_recov);
 619
 620 struct lprocfs_vars lprocfs_osc_obd_vars[] = {
 621         { .name =       "uuid",
 622           .fops =       &osc_uuid_fops                  },
 623         { .name =       "ping",
 624           .fops =       &osc_ping_fops,
 625           .proc_mode =  0222                            },
 626         { .name =       "connect_flags",
 627           .fops =       &osc_connect_flags_fops         },
 628         { .name =       "blocksize",
 629           .fops =       &osc_blksize_fops               },
 630         { .name =       "kbytestotal",
 631           .fops =       &osc_kbytestotal_fops           },
 632         { .name =       "kbytesfree",
 633           .fops =       &osc_kbytesfree_fops            },
 634         { .name =       "kbytesavail",
 635           .fops =       &osc_kbytesavail_fops           },
 636         { .name =       "filestotal",
 637           .fops =       &osc_filestotal_fops            },
 638         { .name =       "filesfree",
 639           .fops =       &osc_filesfree_fops             },
 640         { .name =       "ost_server_uuid",
 641           .fops =       &osc_server_uuid_fops           },
 642         { .name =       "ost_conn_uuid",
 643           .fops =       &osc_conn_uuid_fops             },
 644         { .name =       "active",
 645           .fops =       &osc_active_fops                },
 646         { .name =       "max_pages_per_rpc",
 647           .fops =       &osc_obd_max_pages_per_rpc_fops },
 648         { .name =       "max_rpcs_in_flight",
 649           .fops =       &osc_max_rpcs_in_flight_fops    },
 650         { .name =       "destroys_in_flight",
 651           .fops =       &osc_destroys_in_flight_fops    },
 652         { .name =       "max_dirty_mb",
 653           .fops =       &osc_max_dirty_mb_fops          },
 654         { .name =       "osc_cached_mb",
 655           .fops =       &osc_cached_mb_fops             },
 656         { .name =       "cur_dirty_bytes",
 657           .fops =       &osc_cur_dirty_bytes_fops       },
 658         { .name =       "cur_grant_bytes",
 659           .fops =       &osc_cur_grant_bytes_fops       },
 660         { .name =       "cur_lost_grant_bytes",
 661           .fops =       &osc_cur_lost_grant_bytes_fops  },
 662         { .name =       "cur_dirty_grant_bytes",
 663           .fops =       &osc_cur_dirty_grant_bytes_fops },
 664         { .name =       "grant_shrink_interval",
 665           .fops =       &osc_grant_shrink_interval_fops },
 666         { .name =       "checksums",
 667           .fops =       &osc_checksum_fops              },
 668         { .name =       "checksum_type",
 669           .fops =       &osc_checksum_type_fops         },
 670         { .name =       "resend_count",
 671           .fops =       &osc_resend_count_fops          },
 672         { .name =       "timeouts",
 673           .fops =       &osc_timeouts_fops              },
 674         { .name =       "contention_seconds",
 675           .fops =       &osc_contention_seconds_fops    },
 676         { .name =       "lockless_truncate",
 677           .fops =       &osc_lockless_truncate_fops     },
 678         { .name =       "import",
 679           .fops =       &osc_import_fops                },
 680         { .name =       "state",
 681           .fops =       &osc_state_fops                 },
 682         { .name =       "pinger_recov",
 683           .fops =       &osc_pinger_recov_fops          },
 684         { .name =       "unstable_stats",
 685           .fops =       &osc_unstable_stats_fops        },
 686         { NULL }
 687 };
 688
 689 #define pct(a,b) (b ? a * 100 / b : 0)
 690
 691 static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 692 {
 693         struct timeval now;
 694         struct obd_device *dev = seq->private;
 695         struct client_obd *cli = &dev->u.cli;
 696         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 697         int i;
 698
 699         do_gettimeofday(&now);
 700
 701         spin_lock(&cli->cl_loi_list_lock);
 702
 703         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 704                    now.tv_sec, now.tv_usec);
 705         seq_printf(seq, "read RPCs in flight:  %d\n",
 706                    cli->cl_r_in_flight);
 707         seq_printf(seq, "write RPCs in flight: %d\n",
 708                    cli->cl_w_in_flight);
 709         seq_printf(seq, "pending write pages:  %d\n",
 710                    atomic_read(&cli->cl_pending_w_pages));
 711         seq_printf(seq, "pending read pages:   %d\n",
 712                    atomic_read(&cli->cl_pending_r_pages));
 713
 714         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 715         seq_printf(seq, "pages per rpc         rpcs   %% cum %% |");
 716         seq_printf(seq, "       rpcs   %% cum %%\n");
 717
 718         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 719         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 720
 721         read_cum = 0;
 722         write_cum = 0;
 723         for (i = 0; i < OBD_HIST_MAX; i++) {
 724                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 725                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 726
 727                 read_cum += r;
 728                 write_cum += w;
 729                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 730                            1 << i, r, pct(r, read_tot),
 731                            pct(read_cum, read_tot), w,
 732                            pct(w, write_tot),
 733                            pct(write_cum, write_tot));
 734                 if (read_cum == read_tot && write_cum == write_tot)
 735                         break;
 736         }
 737
 738         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 739         seq_printf(seq, "rpcs in flight        rpcs   %% cum %% |");
 740         seq_printf(seq, "       rpcs   %% cum %%\n");
 741
 742         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 743         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
 744
 745         read_cum = 0;
 746         write_cum = 0;
 747         for (i = 0; i < OBD_HIST_MAX; i++) {
 748                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
 749                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
 750                 read_cum += r;
 751                 write_cum += w;
 752                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 753                            i, r, pct(r, read_tot),
 754                            pct(read_cum, read_tot), w,
 755                            pct(w, write_tot),
 756                            pct(write_cum, write_tot));
 757                 if (read_cum == read_tot && write_cum == write_tot)
 758                         break;
 759         }
 760
 761         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 762         seq_printf(seq, "offset                rpcs   %% cum %% |");
 763         seq_printf(seq, "       rpcs   %% cum %%\n");
 764
 765         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
 766         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist);
 767
 768         read_cum = 0;
 769         write_cum = 0;
 770         for (i = 0; i < OBD_HIST_MAX; i++) {
 771                 unsigned long r = cli->cl_read_offset_hist.oh_buckets[i];
 772                 unsigned long w = cli->cl_write_offset_hist.oh_buckets[i];
 773                 read_cum += r;
 774                 write_cum += w;
 775                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 776                            (i == 0) ? 0 : 1 << (i - 1),
 777                            r, pct(r, read_tot), pct(read_cum, read_tot),
 778                            w, pct(w, write_tot), pct(write_cum, write_tot));
 779                 if (read_cum == read_tot && write_cum == write_tot)
 780                         break;
 781         }
 782
 783         spin_unlock(&cli->cl_loi_list_lock);
 784
 785         return 0;
 786 }
 787 #undef pct
 788
 789 static ssize_t osc_rpc_stats_seq_write(struct file *file,
 790                                        const char __user *buf,
 791                                        size_t len, loff_t *off)
 792 {
 793         struct seq_file *seq = file->private_data;
 794         struct obd_device *dev = seq->private;
 795         struct client_obd *cli = &dev->u.cli;
 796
 797         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 798         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 799         lprocfs_oh_clear(&cli->cl_read_page_hist);
 800         lprocfs_oh_clear(&cli->cl_write_page_hist);
 801         lprocfs_oh_clear(&cli->cl_read_offset_hist);
 802         lprocfs_oh_clear(&cli->cl_write_offset_hist);
 803
 804         return len;
 805 }
 806 LPROC_SEQ_FOPS(osc_rpc_stats);
 807
 808 static int osc_stats_seq_show(struct seq_file *seq, void *v)
 809 {
 810         struct timeval now;
 811         struct obd_device *dev = seq->private;
 812         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 813
 814         do_gettimeofday(&now);
 815
 816         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 817                    now.tv_sec, now.tv_usec);
 818         seq_printf(seq, "lockless_write_bytes\t\t%llu\n",
 819                    stats->os_lockless_writes);
 820         seq_printf(seq, "lockless_read_bytes\t\t%llu\n",
 821                    stats->os_lockless_reads);
 822         seq_printf(seq, "lockless_truncate\t\t%llu\n",
 823                    stats->os_lockless_truncates);
 824         return 0;
 825 }
 826
 827 static ssize_t osc_stats_seq_write(struct file *file,
 828                                    const char __user *buf,
 829                                    size_t len, loff_t *off)
 830 {
 831         struct seq_file *seq = file->private_data;
 832         struct obd_device *dev = seq->private;
 833         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 834
 835         memset(stats, 0, sizeof(*stats));
 836         return len;
 837 }
 838
 839 LPROC_SEQ_FOPS(osc_stats);
 840
 841 int lproc_osc_attach_seqstat(struct obd_device *dev)
 842 {
 843         int rc;
 844
 845         rc = lprocfs_seq_create(dev->obd_proc_entry, "osc_stats", 0644,
 846                                 &osc_stats_fops, dev);
 847         if (rc == 0)
 848                 rc = lprocfs_obd_seq_create(dev, "rpc_stats", 0644,
 849                                             &osc_rpc_stats_fops, dev);
 850
 851         return rc;
 852 }
 853 #endif /* CONFIG_PROC_FS */