lustre/osc/lproc_osc.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2013, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36 #define DEBUG_SUBSYSTEM S_CLASS
  37
  38 #include <linux/version.h>
  39 #include <asm/statfs.h>
  40 #include <obd_cksum.h>
  41 #include <obd_class.h>
  42 #include <lprocfs_status.h>
  43 #include <linux/seq_file.h>
  44 #include "osc_internal.h"
  45
  46 #ifdef LPROCFS
  47 static int osc_rd_active(char *page, char **start, off_t off,
  48                          int count, int *eof, void *data)
  49 {
  50         struct obd_device *dev = data;
  51         int rc;
  52
  53         LPROCFS_CLIMP_CHECK(dev);
  54         rc = snprintf(page, count, "%d\n", !dev->u.cli.cl_import->imp_deactive);
  55         LPROCFS_CLIMP_EXIT(dev);
  56         return rc;
  57 }
  58
  59 static int osc_wr_active(struct file *file, const char *buffer,
  60                          unsigned long count, void *data)
  61 {
  62         struct obd_device *dev = data;
  63         int val, rc;
  64
  65         rc = lprocfs_write_helper(buffer, count, &val);
  66         if (rc)
  67                 return rc;
  68         if (val < 0 || val > 1)
  69                 return -ERANGE;
  70
  71         /* opposite senses */
  72         if (dev->u.cli.cl_import->imp_deactive == val)
  73                 rc = ptlrpc_set_import_active(dev->u.cli.cl_import, val);
  74         else
  75                 CDEBUG(D_CONFIG, "activate %d: ignoring repeat request\n", val);
  76
  77         return count;
  78 }
  79
  80 static int osc_rd_max_rpcs_in_flight(char *page, char **start, off_t off,
  81                                      int count, int *eof, void *data)
  82 {
  83         struct obd_device *dev = data;
  84         struct client_obd *cli = &dev->u.cli;
  85         int rc;
  86
  87         client_obd_list_lock(&cli->cl_loi_list_lock);
  88         rc = snprintf(page, count, "%u\n", cli->cl_max_rpcs_in_flight);
  89         client_obd_list_unlock(&cli->cl_loi_list_lock);
  90         return rc;
  91 }
  92
  93 static int osc_wr_max_rpcs_in_flight(struct file *file, const char *buffer,
  94                                      unsigned long count, void *data)
  95 {
  96         struct obd_device *dev = data;
  97         struct client_obd *cli = &dev->u.cli;
  98         struct ptlrpc_request_pool *pool = cli->cl_import->imp_rq_pool;
  99         int val, rc;
 100
 101         rc = lprocfs_write_helper(buffer, count, &val);
 102         if (rc)
 103                 return rc;
 104
 105         if (val < 1 || val > OSC_MAX_RIF_MAX)
 106                 return -ERANGE;
 107
 108         LPROCFS_CLIMP_CHECK(dev);
 109         if (pool && val > cli->cl_max_rpcs_in_flight)
 110                 pool->prp_populate(pool, val-cli->cl_max_rpcs_in_flight);
 111
 112         client_obd_list_lock(&cli->cl_loi_list_lock);
 113         cli->cl_max_rpcs_in_flight = val;
 114         client_obd_list_unlock(&cli->cl_loi_list_lock);
 115
 116         LPROCFS_CLIMP_EXIT(dev);
 117         return count;
 118 }
 119
 120 static int osc_rd_max_dirty_mb(char *page, char **start, off_t off, int count,
 121                                int *eof, void *data)
 122 {
 123         struct obd_device *dev = data;
 124         struct client_obd *cli = &dev->u.cli;
 125         long val;
 126         int mult;
 127
 128         client_obd_list_lock(&cli->cl_loi_list_lock);
 129         val = cli->cl_dirty_max;
 130         client_obd_list_unlock(&cli->cl_loi_list_lock);
 131
 132         mult = 1 << 20;
 133         return lprocfs_read_frac_helper(page, count, val, mult);
 134 }
 135
 136 static int osc_wr_max_dirty_mb(struct file *file, const char *buffer,
 137                                unsigned long count, void *data)
 138 {
 139         struct obd_device *dev = data;
 140         struct client_obd *cli = &dev->u.cli;
 141         int pages_number, mult, rc;
 142
 143         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 144         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 145         if (rc)
 146                 return rc;
 147
 148         if (pages_number <= 0 ||
 149             pages_number > OSC_MAX_DIRTY_MB_MAX << (20 - PAGE_CACHE_SHIFT) ||
 150             pages_number > totalram_pages / 4) /* 1/4 of RAM */
 151                 return -ERANGE;
 152
 153         client_obd_list_lock(&cli->cl_loi_list_lock);
 154         cli->cl_dirty_max = (obd_count)(pages_number << PAGE_CACHE_SHIFT);
 155         osc_wake_cache_waiters(cli);
 156         client_obd_list_unlock(&cli->cl_loi_list_lock);
 157
 158         return count;
 159 }
 160
 161 static int osc_rd_cached_mb(char *page, char **start, off_t off, int count,
 162                             int *eof, void *data)
 163 {
 164         struct obd_device *dev = data;
 165         struct client_obd *cli = &dev->u.cli;
 166         int shift = 20 - PAGE_CACHE_SHIFT;
 167         int rc;
 168
 169         rc = snprintf(page, count,
 170                       "used_mb: %d\n"
 171                       "busy_cnt: %d\n",
 172                       (cfs_atomic_read(&cli->cl_lru_in_list) +
 173                         cfs_atomic_read(&cli->cl_lru_busy)) >> shift,
 174                       cfs_atomic_read(&cli->cl_lru_busy));
 175
 176         return rc;
 177 }
 178
 179 /* shrink the number of caching pages to a specific number */
 180 static int osc_wr_cached_mb(struct file *file, const char *buffer,
 181                             unsigned long count, void *data)
 182 {
 183         struct obd_device *dev = data;
 184         struct client_obd *cli = &dev->u.cli;
 185         int pages_number, mult, rc;
 186
 187         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 188         buffer = lprocfs_find_named_value(buffer, "used_mb:", &count);
 189         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 190         if (rc)
 191                 return rc;
 192
 193         if (pages_number < 0)
 194                 return -ERANGE;
 195
 196         rc = cfs_atomic_read(&cli->cl_lru_in_list) - pages_number;
 197         if (rc > 0) {
 198                 struct lu_env *env;
 199                 int refcheck;
 200
 201                 env = cl_env_get(&refcheck);
 202                 if (!IS_ERR(env)) {
 203                         (void)osc_lru_shrink(env, cli, rc, true);
 204                         cl_env_put(env, &refcheck);
 205                 }
 206         }
 207
 208         return count;
 209 }
 210
 211 static int osc_rd_cur_dirty_bytes(char *page, char **start, off_t off,
 212                                   int count, int *eof, void *data)
 213 {
 214         struct obd_device *dev = data;
 215         struct client_obd *cli = &dev->u.cli;
 216         int rc;
 217
 218         client_obd_list_lock(&cli->cl_loi_list_lock);
 219         rc = snprintf(page, count, "%lu\n", cli->cl_dirty);
 220         client_obd_list_unlock(&cli->cl_loi_list_lock);
 221         return rc;
 222 }
 223
 224 static int osc_rd_cur_grant_bytes(char *page, char **start, off_t off,
 225                                   int count, int *eof, void *data)
 226 {
 227         struct obd_device *dev = data;
 228         struct client_obd *cli = &dev->u.cli;
 229         int rc;
 230
 231         client_obd_list_lock(&cli->cl_loi_list_lock);
 232         rc = snprintf(page, count, "%lu\n", cli->cl_avail_grant);
 233         client_obd_list_unlock(&cli->cl_loi_list_lock);
 234         return rc;
 235 }
 236
 237 static int osc_wr_cur_grant_bytes(struct file *file, const char *buffer,
 238                                   unsigned long count, void *data)
 239 {
 240         struct obd_device *obd = data;
 241         struct client_obd *cli = &obd->u.cli;
 242         int                rc;
 243         __u64              val;
 244
 245         if (obd == NULL)
 246                 return 0;
 247
 248         rc = lprocfs_write_u64_helper(buffer, count, &val);
 249         if (rc)
 250                 return rc;
 251
 252         /* this is only for shrinking grant */
 253         client_obd_list_lock(&cli->cl_loi_list_lock);
 254         if (val >= cli->cl_avail_grant) {
 255                 client_obd_list_unlock(&cli->cl_loi_list_lock);
 256                 return 0;
 257         }
 258         client_obd_list_unlock(&cli->cl_loi_list_lock);
 259
 260         LPROCFS_CLIMP_CHECK(obd);
 261         if (cli->cl_import->imp_state == LUSTRE_IMP_FULL)
 262                 rc = osc_shrink_grant_to_target(cli, val);
 263         LPROCFS_CLIMP_EXIT(obd);
 264         if (rc)
 265                 return rc;
 266         return count;
 267 }
 268
 269 static int osc_rd_cur_lost_grant_bytes(char *page, char **start, off_t off,
 270                                        int count, int *eof, void *data)
 271 {
 272         struct obd_device *dev = data;
 273         struct client_obd *cli = &dev->u.cli;
 274         int rc;
 275
 276         client_obd_list_lock(&cli->cl_loi_list_lock);
 277         rc = snprintf(page, count, "%lu\n", cli->cl_lost_grant);
 278         client_obd_list_unlock(&cli->cl_loi_list_lock);
 279         return rc;
 280 }
 281
 282 static int osc_rd_grant_shrink_interval(char *page, char **start, off_t off,
 283                                         int count, int *eof, void *data)
 284 {
 285         struct obd_device *obd = data;
 286
 287         if (obd == NULL)
 288                 return 0;
 289         return snprintf(page, count, "%d\n",
 290                         obd->u.cli.cl_grant_shrink_interval);
 291 }
 292
 293 static int osc_wr_grant_shrink_interval(struct file *file, const char *buffer,
 294                                         unsigned long count, void *data)
 295 {
 296         struct obd_device *obd = data;
 297         int val, rc;
 298
 299         if (obd == NULL)
 300                 return 0;
 301
 302         rc = lprocfs_write_helper(buffer, count, &val);
 303         if (rc)
 304                 return rc;
 305
 306         if (val <= 0)
 307                 return -ERANGE;
 308
 309         obd->u.cli.cl_grant_shrink_interval = val;
 310
 311         return count;
 312 }
 313
 314 static int osc_rd_checksum(char *page, char **start, off_t off, int count,
 315                            int *eof, void *data)
 316 {
 317         struct obd_device *obd = data;
 318
 319         if (obd == NULL)
 320                 return 0;
 321
 322         return snprintf(page, count, "%d\n",
 323                         obd->u.cli.cl_checksum ? 1 : 0);
 324 }
 325
 326 static int osc_wr_checksum(struct file *file, const char *buffer,
 327                            unsigned long count, void *data)
 328 {
 329         struct obd_device *obd = data;
 330         int val, rc;
 331
 332         if (obd == NULL)
 333                 return 0;
 334
 335         rc = lprocfs_write_helper(buffer, count, &val);
 336         if (rc)
 337                 return rc;
 338
 339         obd->u.cli.cl_checksum = (val ? 1 : 0);
 340
 341         return count;
 342 }
 343
 344 static int osc_rd_checksum_type(char *page, char **start, off_t off, int count,
 345                                 int *eof, void *data)
 346 {
 347         struct obd_device *obd = data;
 348         int i, len =0;
 349         DECLARE_CKSUM_NAME;
 350
 351         if (obd == NULL)
 352                 return 0;
 353
 354         for (i = 0; i < ARRAY_SIZE(cksum_name) && len < count; i++) {
 355                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 356                         continue;
 357                 if (obd->u.cli.cl_cksum_type == (1 << i))
 358                         len += snprintf(page + len, count - len, "[%s] ",
 359                                         cksum_name[i]);
 360                 else
 361                         len += snprintf(page + len, count - len, "%s ",
 362                                         cksum_name[i]);
 363         }
 364         if (len < count)
 365                 len += sprintf(page + len, "\n");
 366         return len;
 367 }
 368
 369 static int osc_wd_checksum_type(struct file *file, const char *buffer,
 370                                 unsigned long count, void *data)
 371 {
 372         struct obd_device *obd = data;
 373         int i;
 374         DECLARE_CKSUM_NAME;
 375         char kernbuf[10];
 376
 377         if (obd == NULL)
 378                 return 0;
 379
 380         if (count > sizeof(kernbuf) - 1)
 381                 return -EINVAL;
 382         if (copy_from_user(kernbuf, buffer, count))
 383                 return -EFAULT;
 384         if (count > 0 && kernbuf[count - 1] == '\n')
 385                 kernbuf[count - 1] = '\0';
 386         else
 387                 kernbuf[count] = '\0';
 388
 389         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 390                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 391                         continue;
 392                 if (!strcmp(kernbuf, cksum_name[i])) {
 393                        obd->u.cli.cl_cksum_type = 1 << i;
 394                        return count;
 395                 }
 396         }
 397         return -EINVAL;
 398 }
 399
 400 static int osc_rd_resend_count(char *page, char **start, off_t off, int count,
 401                                int *eof, void *data)
 402 {
 403         struct obd_device *obd = data;
 404
 405         return snprintf(page, count, "%u\n",
 406                         cfs_atomic_read(&obd->u.cli.cl_resends));
 407 }
 408
 409 static int osc_wr_resend_count(struct file *file, const char *buffer,
 410                                unsigned long count, void *data)
 411 {
 412         struct obd_device *obd = data;
 413         int val, rc;
 414
 415         rc = lprocfs_write_helper(buffer, count, &val);
 416         if (rc)
 417                 return rc;
 418
 419         if (val < 0)
 420                return -EINVAL;
 421
 422         cfs_atomic_set(&obd->u.cli.cl_resends, val);
 423
 424         return count;
 425 }
 426
 427 static int osc_rd_contention_seconds(char *page, char **start, off_t off,
 428                                      int count, int *eof, void *data)
 429 {
 430         struct obd_device *obd = data;
 431         struct osc_device *od  = obd2osc_dev(obd);
 432
 433         return snprintf(page, count, "%u\n", od->od_contention_time);
 434 }
 435
 436 static int osc_wr_contention_seconds(struct file *file, const char *buffer,
 437                                      unsigned long count, void *data)
 438 {
 439         struct obd_device *obd = data;
 440         struct osc_device *od  = obd2osc_dev(obd);
 441
 442         return lprocfs_write_helper(buffer, count, &od->od_contention_time) ?:
 443                 count;
 444 }
 445
 446 static int osc_rd_lockless_truncate(char *page, char **start, off_t off,
 447                                     int count, int *eof, void *data)
 448 {
 449         struct obd_device *obd = data;
 450         struct osc_device *od  = obd2osc_dev(obd);
 451
 452         return snprintf(page, count, "%u\n", od->od_lockless_truncate);
 453 }
 454
 455 static int osc_wr_lockless_truncate(struct file *file, const char *buffer,
 456                                     unsigned long count, void *data)
 457 {
 458         struct obd_device *obd = data;
 459         struct osc_device *od  = obd2osc_dev(obd);
 460
 461         return lprocfs_write_helper(buffer, count, &od->od_lockless_truncate) ?:
 462                 count;
 463 }
 464
 465 static int osc_rd_destroys_in_flight(char *page, char **start, off_t off,
 466                                      int count, int *eof, void *data)
 467 {
 468         struct obd_device *obd = data;
 469         return snprintf(page, count, "%u\n",
 470                         cfs_atomic_read(&obd->u.cli.cl_destroy_in_flight));
 471 }
 472
 473 static int lprocfs_osc_wr_max_pages_per_rpc(struct file *file,
 474         const char *buffer, unsigned long count, void *data)
 475 {
 476         struct obd_device *dev = data;
 477         struct client_obd *cli = &dev->u.cli;
 478         struct obd_connect_data *ocd = &cli->cl_import->imp_connect_data;
 479         int chunk_mask, rc;
 480         __u64 val;
 481
 482         rc = lprocfs_write_u64_helper(buffer, count, &val);
 483         if (rc)
 484                 return rc;
 485
 486         /* if the max_pages is specified in bytes, convert to pages */
 487         if (val >= ONE_MB_BRW_SIZE)
 488                 val >>= PAGE_CACHE_SHIFT;
 489
 490         LPROCFS_CLIMP_CHECK(dev);
 491
 492         chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_CACHE_SHIFT)) - 1);
 493         /* max_pages_per_rpc must be chunk aligned */
 494         val = (val + ~chunk_mask) & chunk_mask;
 495         if (val == 0 || val > ocd->ocd_brw_size >> PAGE_CACHE_SHIFT) {
 496                 LPROCFS_CLIMP_EXIT(dev);
 497                 return -ERANGE;
 498         }
 499         client_obd_list_lock(&cli->cl_loi_list_lock);
 500         cli->cl_max_pages_per_rpc = val;
 501         client_obd_list_unlock(&cli->cl_loi_list_lock);
 502
 503         LPROCFS_CLIMP_EXIT(dev);
 504         return count;
 505 }
 506
 507 static int osc_rd_unstable_stats(char *page, char **start, off_t off,
 508                                 int count, int *eof, void *data)
 509 {
 510         struct obd_device *dev = data;
 511         struct client_obd *cli = &dev->u.cli;
 512         int pages, mb;
 513
 514         pages = cfs_atomic_read(&cli->cl_unstable_count);
 515         mb    = (pages * PAGE_CACHE_SIZE) >> 20;
 516
 517         return snprintf(page, count,
 518                         "unstable_pages: %8d\n"
 519                         "unstable_mb:    %8d\n",
 520                         pages, mb);
 521 }
 522
 523 static struct lprocfs_vars lprocfs_osc_obd_vars[] = {
 524         { "uuid",            lprocfs_rd_uuid,        0, 0 },
 525         { "ping",            0, lprocfs_wr_ping,     0, 0, 0222 },
 526         { "connect_flags",   lprocfs_rd_connect_flags, 0, 0 },
 527         { "blocksize",       lprocfs_rd_blksize,     0, 0 },
 528         { "kbytestotal",     lprocfs_rd_kbytestotal, 0, 0 },
 529         { "kbytesfree",      lprocfs_rd_kbytesfree,  0, 0 },
 530         { "kbytesavail",     lprocfs_rd_kbytesavail, 0, 0 },
 531         { "filestotal",      lprocfs_rd_filestotal,  0, 0 },
 532         { "filesfree",       lprocfs_rd_filesfree,   0, 0 },
 533         //{ "filegroups",      lprocfs_rd_filegroups,  0, 0 },
 534         { "ost_server_uuid", lprocfs_rd_server_uuid, 0, 0 },
 535         { "ost_conn_uuid",   lprocfs_rd_conn_uuid, 0, 0 },
 536         { "active",          osc_rd_active,
 537                              osc_wr_active, 0 },
 538         { "max_pages_per_rpc", lprocfs_obd_rd_max_pages_per_rpc,
 539                                lprocfs_osc_wr_max_pages_per_rpc, 0 },
 540         { "max_rpcs_in_flight", osc_rd_max_rpcs_in_flight,
 541                                 osc_wr_max_rpcs_in_flight, 0 },
 542         { "destroys_in_flight", osc_rd_destroys_in_flight, 0, 0 },
 543         { "max_dirty_mb",    osc_rd_max_dirty_mb, osc_wr_max_dirty_mb, 0 },
 544         { "osc_cached_mb",   osc_rd_cached_mb,     osc_wr_cached_mb, 0 },
 545         { "cur_dirty_bytes", osc_rd_cur_dirty_bytes, 0, 0 },
 546         { "cur_grant_bytes", osc_rd_cur_grant_bytes,
 547                              osc_wr_cur_grant_bytes, 0 },
 548         { "cur_lost_grant_bytes", osc_rd_cur_lost_grant_bytes, 0, 0},
 549         { "grant_shrink_interval", osc_rd_grant_shrink_interval,
 550                                    osc_wr_grant_shrink_interval, 0 },
 551         { "checksums",       osc_rd_checksum, osc_wr_checksum, 0 },
 552         { "checksum_type",   osc_rd_checksum_type, osc_wd_checksum_type, 0 },
 553         { "resend_count",    osc_rd_resend_count, osc_wr_resend_count, 0},
 554         { "timeouts",        lprocfs_rd_timeouts,      0, 0 },
 555         { "contention_seconds", osc_rd_contention_seconds,
 556                                 osc_wr_contention_seconds, 0 },
 557         { "lockless_truncate",  osc_rd_lockless_truncate,
 558                                 osc_wr_lockless_truncate, 0 },
 559         { "import",          lprocfs_rd_import,        lprocfs_wr_import, 0 },
 560         { "state",           lprocfs_rd_state,         0, 0 },
 561         { "pinger_recov",    lprocfs_rd_pinger_recov,
 562                              lprocfs_wr_pinger_recov,  0, 0 },
 563         { "unstable_stats",  osc_rd_unstable_stats, 0, 0},
 564
 565         { 0 }
 566 };
 567
 568 static struct lprocfs_vars lprocfs_osc_module_vars[] = {
 569         { "num_refs",        lprocfs_rd_numrefs,     0, 0 },
 570         { 0 }
 571 };
 572
 573 #define pct(a,b) (b ? a * 100 / b : 0)
 574
 575 static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 576 {
 577         struct timeval now;
 578         struct obd_device *dev = seq->private;
 579         struct client_obd *cli = &dev->u.cli;
 580         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 581         int i;
 582
 583         do_gettimeofday(&now);
 584
 585         client_obd_list_lock(&cli->cl_loi_list_lock);
 586
 587         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 588                    now.tv_sec, now.tv_usec);
 589         seq_printf(seq, "read RPCs in flight:  %d\n",
 590                    cli->cl_r_in_flight);
 591         seq_printf(seq, "write RPCs in flight: %d\n",
 592                    cli->cl_w_in_flight);
 593         seq_printf(seq, "pending write pages:  %d\n",
 594                    cfs_atomic_read(&cli->cl_pending_w_pages));
 595         seq_printf(seq, "pending read pages:   %d\n",
 596                    cfs_atomic_read(&cli->cl_pending_r_pages));
 597
 598         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 599         seq_printf(seq, "pages per rpc         rpcs   %% cum %% |");
 600         seq_printf(seq, "       rpcs   %% cum %%\n");
 601
 602         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 603         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 604
 605         read_cum = 0;
 606         write_cum = 0;
 607         for (i = 0; i < OBD_HIST_MAX; i++) {
 608                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 609                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 610                 read_cum += r;
 611                 write_cum += w;
 612                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 613                                  1 << i, r, pct(r, read_tot),
 614                                  pct(read_cum, read_tot), w,
 615                                  pct(w, write_tot),
 616                                  pct(write_cum, write_tot));
 617                 if (read_cum == read_tot && write_cum == write_tot)
 618                         break;
 619         }
 620
 621         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 622         seq_printf(seq, "rpcs in flight        rpcs   %% cum %% |");
 623         seq_printf(seq, "       rpcs   %% cum %%\n");
 624
 625         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 626         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
 627
 628         read_cum = 0;
 629         write_cum = 0;
 630         for (i = 0; i < OBD_HIST_MAX; i++) {
 631                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
 632                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
 633                 read_cum += r;
 634                 write_cum += w;
 635                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 636                                  i, r, pct(r, read_tot),
 637                                  pct(read_cum, read_tot), w,
 638                                  pct(w, write_tot),
 639                                  pct(write_cum, write_tot));
 640                 if (read_cum == read_tot && write_cum == write_tot)
 641                         break;
 642         }
 643
 644         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 645         seq_printf(seq, "offset                rpcs   %% cum %% |");
 646         seq_printf(seq, "       rpcs   %% cum %%\n");
 647
 648         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
 649         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist);
 650
 651         read_cum = 0;
 652         write_cum = 0;
 653         for (i = 0; i < OBD_HIST_MAX; i++) {
 654                 unsigned long r = cli->cl_read_offset_hist.oh_buckets[i];
 655                 unsigned long w = cli->cl_write_offset_hist.oh_buckets[i];
 656                 read_cum += r;
 657                 write_cum += w;
 658                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 659                            (i == 0) ? 0 : 1 << (i - 1),
 660                            r, pct(r, read_tot), pct(read_cum, read_tot),
 661                            w, pct(w, write_tot), pct(write_cum, write_tot));
 662                 if (read_cum == read_tot && write_cum == write_tot)
 663                         break;
 664         }
 665
 666         client_obd_list_unlock(&cli->cl_loi_list_lock);
 667
 668         return 0;
 669 }
 670 #undef pct
 671
 672 static ssize_t osc_rpc_stats_seq_write(struct file *file, const char *buf,
 673                                        size_t len, loff_t *off)
 674 {
 675         struct seq_file *seq = file->private_data;
 676         struct obd_device *dev = seq->private;
 677         struct client_obd *cli = &dev->u.cli;
 678
 679         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 680         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 681         lprocfs_oh_clear(&cli->cl_read_page_hist);
 682         lprocfs_oh_clear(&cli->cl_write_page_hist);
 683         lprocfs_oh_clear(&cli->cl_read_offset_hist);
 684         lprocfs_oh_clear(&cli->cl_write_offset_hist);
 685
 686         return len;
 687 }
 688
 689 LPROC_SEQ_FOPS(osc_rpc_stats);
 690
 691 static int osc_stats_seq_show(struct seq_file *seq, void *v)
 692 {
 693         struct timeval now;
 694         struct obd_device *dev = seq->private;
 695         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 696
 697         do_gettimeofday(&now);
 698
 699         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 700                    now.tv_sec, now.tv_usec);
 701         seq_printf(seq, "lockless_write_bytes\t\t"LPU64"\n",
 702                    stats->os_lockless_writes);
 703         seq_printf(seq, "lockless_read_bytes\t\t"LPU64"\n",
 704                    stats->os_lockless_reads);
 705         seq_printf(seq, "lockless_truncate\t\t"LPU64"\n",
 706                    stats->os_lockless_truncates);
 707         return 0;
 708 }
 709
 710 static ssize_t osc_stats_seq_write(struct file *file, const char *buf,
 711                                    size_t len, loff_t *off)
 712 {
 713         struct seq_file *seq = file->private_data;
 714         struct obd_device *dev = seq->private;
 715         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 716
 717         memset(stats, 0, sizeof(*stats));
 718         return len;
 719 }
 720
 721 LPROC_SEQ_FOPS(osc_stats);
 722
 723 int lproc_osc_attach_seqstat(struct obd_device *dev)
 724 {
 725         int rc;
 726
 727         rc = lprocfs_seq_create(dev->obd_proc_entry, "osc_stats", 0644,
 728                                 &osc_stats_fops, dev);
 729         if (rc == 0)
 730                 rc = lprocfs_obd_seq_create(dev, "rpc_stats", 0644,
 731                                             &osc_rpc_stats_fops, dev);
 732
 733         return rc;
 734 }
 735
 736 void lprocfs_osc_init_vars(struct lprocfs_static_vars *lvars)
 737 {
 738         lvars->module_vars = lprocfs_osc_module_vars;
 739         lvars->obd_vars    = lprocfs_osc_obd_vars;
 740 }
 741 #endif /* LPROCFS */