lustre/osc/lproc_osc.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  30  * Use is subject to license terms.
  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_class.h>
  41 #include <lprocfs_status.h>
  42 #include <linux/seq_file.h>
  43 #include "osc_internal.h"
  44
  45 #ifdef LPROCFS
  46 static int osc_rd_active(char *page, char **start, off_t off,
  47                          int count, int *eof, void *data)
  48 {
  49         struct obd_device *dev = data;
  50         int rc;
  51
  52         LPROCFS_CLIMP_CHECK(dev);
  53         rc = snprintf(page, count, "%d\n", !dev->u.cli.cl_import->imp_deactive);
  54         LPROCFS_CLIMP_EXIT(dev);
  55         return rc;
  56 }
  57
  58 static int osc_wr_active(struct file *file, const char *buffer,
  59                          unsigned long count, void *data)
  60 {
  61         struct obd_device *dev = data;
  62         int val, rc;
  63
  64         rc = lprocfs_write_helper(buffer, count, &val);
  65         if (rc)
  66                 return rc;
  67         if (val < 0 || val > 1)
  68                 return -ERANGE;
  69
  70         LPROCFS_CLIMP_CHECK(dev);
  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         LPROCFS_CLIMP_EXIT(dev);
  78         return count;
  79 }
  80
  81
  82 static int osc_rd_max_pages_per_rpc(char *page, char **start, off_t off,
  83                                     int count, int *eof, void *data)
  84 {
  85         struct obd_device *dev = data;
  86         struct client_obd *cli = &dev->u.cli;
  87         int rc;
  88
  89         client_obd_list_lock(&cli->cl_loi_list_lock);
  90         rc = snprintf(page, count, "%d\n", cli->cl_max_pages_per_rpc);
  91         client_obd_list_unlock(&cli->cl_loi_list_lock);
  92         return rc;
  93 }
  94
  95 static int osc_wr_max_pages_per_rpc(struct file *file, const char *buffer,
  96                                     unsigned long count, void *data)
  97 {
  98         struct obd_device *dev = data;
  99         struct client_obd *cli = &dev->u.cli;
 100         struct obd_connect_data *ocd;
 101         int val, rc;
 102
 103         rc = lprocfs_write_helper(buffer, count, &val);
 104         if (rc)
 105                 return rc;
 106
 107         LPROCFS_CLIMP_CHECK(dev);
 108         ocd = &cli->cl_import->imp_connect_data;
 109         if (val < 1 || val > ocd->ocd_brw_size >> CFS_PAGE_SHIFT) {
 110                 LPROCFS_CLIMP_EXIT(dev);
 111                 return -ERANGE;
 112         }
 113         client_obd_list_lock(&cli->cl_loi_list_lock);
 114         cli->cl_max_pages_per_rpc = val;
 115         client_obd_list_unlock(&cli->cl_loi_list_lock);
 116         LPROCFS_CLIMP_EXIT(dev);
 117         return count;
 118 }
 119
 120 static int osc_rd_max_rpcs_in_flight(char *page, char **start, off_t off,
 121                                      int count, int *eof, void *data)
 122 {
 123         struct obd_device *dev = data;
 124         struct client_obd *cli = &dev->u.cli;
 125         int rc;
 126
 127         client_obd_list_lock(&cli->cl_loi_list_lock);
 128         rc = snprintf(page, count, "%u\n", cli->cl_max_rpcs_in_flight);
 129         client_obd_list_unlock(&cli->cl_loi_list_lock);
 130         return rc;
 131 }
 132
 133 static int osc_wr_max_rpcs_in_flight(struct file *file, const char *buffer,
 134                                      unsigned long count, void *data)
 135 {
 136         struct obd_device *dev = data;
 137         struct client_obd *cli = &dev->u.cli;
 138         struct ptlrpc_request_pool *pool;
 139         int val, rc;
 140
 141         rc = lprocfs_write_helper(buffer, count, &val);
 142         if (rc)
 143                 return rc;
 144         if (val < 1 || val > OSC_MAX_RIF_MAX)
 145                 return -ERANGE;
 146
 147         LPROCFS_CLIMP_CHECK(dev);
 148         pool = cli->cl_import->imp_rq_pool;
 149         if (pool && val > cli->cl_max_rpcs_in_flight)
 150                 pool->prp_populate(pool, val-cli->cl_max_rpcs_in_flight);
 151
 152         client_obd_list_lock(&cli->cl_loi_list_lock);
 153         cli->cl_max_rpcs_in_flight = val;
 154         client_obd_list_unlock(&cli->cl_loi_list_lock);
 155
 156         LPROCFS_CLIMP_EXIT(dev);
 157         return count;
 158 }
 159
 160 static int osc_rd_max_dirty_mb(char *page, char **start, off_t off, int count,
 161                                int *eof, void *data)
 162 {
 163         struct obd_device *dev = data;
 164         struct client_obd *cli = &dev->u.cli;
 165         long val;
 166         int mult;
 167
 168         client_obd_list_lock(&cli->cl_loi_list_lock);
 169         val = cli->cl_dirty_max;
 170         client_obd_list_unlock(&cli->cl_loi_list_lock);
 171
 172         mult = 1 << 20;
 173         return lprocfs_read_frac_helper(page, count, val, mult);
 174 }
 175
 176 static int osc_wr_max_dirty_mb(struct file *file, const char *buffer,
 177                                unsigned long count, void *data)
 178 {
 179         struct obd_device *dev = data;
 180         struct client_obd *cli = &dev->u.cli;
 181         int pages_number, mult, rc;
 182
 183         mult = 1 << (20 - CFS_PAGE_SHIFT);
 184         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 185         if (rc)
 186                 return rc;
 187
 188         if (pages_number < 0 || pages_number > OSC_MAX_DIRTY_MB_MAX << (20 - CFS_PAGE_SHIFT) ||
 189             pages_number > num_physpages / 4) /* 1/4 of RAM */
 190                 return -ERANGE;
 191
 192         client_obd_list_lock(&cli->cl_loi_list_lock);
 193         cli->cl_dirty_max = (obd_count)(pages_number << CFS_PAGE_SHIFT);
 194         osc_wake_cache_waiters(cli);
 195         client_obd_list_unlock(&cli->cl_loi_list_lock);
 196
 197         return count;
 198 }
 199
 200 static int osc_rd_cur_dirty_bytes(char *page, char **start, off_t off,
 201                                   int count, int *eof, void *data)
 202 {
 203         struct obd_device *dev = data;
 204         struct client_obd *cli = &dev->u.cli;
 205         int rc;
 206
 207         client_obd_list_lock(&cli->cl_loi_list_lock);
 208         rc = snprintf(page, count, "%lu\n", cli->cl_dirty);
 209         client_obd_list_unlock(&cli->cl_loi_list_lock);
 210         return rc;
 211 }
 212
 213 static int osc_rd_cur_grant_bytes(char *page, char **start, off_t off,
 214                                   int count, int *eof, void *data)
 215 {
 216         struct obd_device *dev = data;
 217         struct client_obd *cli = &dev->u.cli;
 218         int rc;
 219
 220         client_obd_list_lock(&cli->cl_loi_list_lock);
 221         rc = snprintf(page, count, "%lu\n", cli->cl_avail_grant);
 222         client_obd_list_unlock(&cli->cl_loi_list_lock);
 223         return rc;
 224 }
 225
 226 static int osc_wr_cur_grant_bytes(struct file *file, const char *buffer,
 227                                   unsigned long count, void *data)
 228 {
 229         struct obd_device *obd = data;
 230         struct client_obd *cli = &obd->u.cli;
 231         int                rc;
 232         __u64              val;
 233
 234         if (obd == NULL)
 235                 return 0;
 236
 237         rc = lprocfs_write_u64_helper(buffer, count, &val);
 238         if (rc)
 239                 return rc;
 240
 241         /* this is only for shrinking grant */
 242         client_obd_list_lock(&cli->cl_loi_list_lock);
 243         if (val >= cli->cl_avail_grant) {
 244                 client_obd_list_unlock(&cli->cl_loi_list_lock);
 245                 return 0;
 246         }
 247         client_obd_list_unlock(&cli->cl_loi_list_lock);
 248
 249         LPROCFS_CLIMP_CHECK(obd);
 250         if (cli->cl_import->imp_state == LUSTRE_IMP_FULL)
 251                 rc = osc_shrink_grant_to_target(cli, val);
 252         LPROCFS_CLIMP_EXIT(obd);
 253         if (rc)
 254                 return rc;
 255         return count;
 256 }
 257
 258 static int osc_rd_cur_lost_grant_bytes(char *page, char **start, off_t off,
 259                                        int count, int *eof, void *data)
 260 {
 261         struct obd_device *dev = data;
 262         struct client_obd *cli = &dev->u.cli;
 263         int rc;
 264
 265         client_obd_list_lock(&cli->cl_loi_list_lock);
 266         rc = snprintf(page, count, "%lu\n", cli->cl_lost_grant);
 267         client_obd_list_unlock(&cli->cl_loi_list_lock);
 268         return rc;
 269 }
 270
 271 static int osc_rd_grant_shrink_interval(char *page, char **start, off_t off,
 272                                         int count, int *eof, void *data)
 273 {
 274         struct obd_device *obd = data;
 275
 276         if (obd == NULL)
 277                 return 0;
 278         return snprintf(page, count, "%d\n",
 279                         obd->u.cli.cl_grant_shrink_interval);
 280 }
 281
 282 static int osc_wr_grant_shrink_interval(struct file *file, const char *buffer,
 283                                         unsigned long count, void *data)
 284 {
 285         struct obd_device *obd = data;
 286         int val, rc;
 287
 288         if (obd == NULL)
 289                 return 0;
 290
 291         rc = lprocfs_write_helper(buffer, count, &val);
 292         if (rc)
 293                 return rc;
 294
 295         if (val <= 0)
 296                 return -ERANGE;
 297
 298         obd->u.cli.cl_grant_shrink_interval = val;
 299
 300         return count;
 301 }
 302
 303 static int osc_rd_create_count(char *page, char **start, off_t off, int count,
 304                                int *eof, void *data)
 305 {
 306         struct obd_device *obd = data;
 307
 308         if (obd == NULL)
 309                 return 0;
 310
 311         return snprintf(page, count, "%d\n",
 312                         obd->u.cli.cl_oscc.oscc_grow_count);
 313 }
 314
 315 static int osc_wr_create_count(struct file *file, const char *buffer,
 316                                unsigned long count, void *data)
 317 {
 318         struct obd_device *obd = data;
 319         int val, rc, i;
 320
 321         if (obd == NULL)
 322                 return 0;
 323
 324         rc = lprocfs_write_helper(buffer, count, &val);
 325         if (rc)
 326                 return rc;
 327
 328         /* The MDT ALWAYS needs to limit the precreate count to
 329          * OST_MAX_PRECREATE, and the constant cannot be changed
 330          * because it is a value shared between the OSC and OST
 331          * that is the maximum possible number of objects that will
 332          * ever be handled by MDT->OST recovery processing.
 333          *
 334          * If the OST ever gets a request to delete more orphans,
 335          * this implies that something has gone badly on the MDT
 336          * and the OST will refuse to delete so much data from the
 337          * filesystem as a safety measure. */
 338         if (val < OST_MIN_PRECREATE || val > OST_MAX_PRECREATE)
 339                 return -ERANGE;
 340         if (val > obd->u.cli.cl_oscc.oscc_max_grow_count)
 341                 return -ERANGE;
 342
 343         for (i = 1; (i << 1) <= val; i <<= 1)
 344                 ;
 345         obd->u.cli.cl_oscc.oscc_grow_count = i;
 346
 347         return count;
 348 }
 349
 350 static int osc_rd_max_create_count(char *page, char **start, off_t off,
 351                                    int count, int *eof, void *data)
 352 {
 353         struct obd_device *obd = data;
 354
 355         if (obd == NULL)
 356                 return 0;
 357
 358         return snprintf(page, count, "%d\n",
 359                         obd->u.cli.cl_oscc.oscc_max_grow_count);
 360 }
 361
 362 static int osc_wr_max_create_count(struct file *file, const char *buffer,
 363                                    unsigned long count, void *data)
 364 {
 365         struct obd_device *obd = data;
 366         int val, rc;
 367
 368         if (obd == NULL)
 369                 return 0;
 370
 371         rc = lprocfs_write_helper(buffer, count, &val);
 372         if (rc)
 373                 return rc;
 374
 375         if (val < 0)
 376                 return -ERANGE;
 377         if (val > OST_MAX_PRECREATE)
 378                 return -ERANGE;
 379
 380         if (obd->u.cli.cl_oscc.oscc_grow_count > val)
 381                 obd->u.cli.cl_oscc.oscc_grow_count = val;
 382
 383         obd->u.cli.cl_oscc.oscc_max_grow_count = val;
 384
 385         return count;
 386 }
 387
 388 static int osc_rd_prealloc_next_id(char *page, char **start, off_t off,
 389                                    int count, int *eof, void *data)
 390 {
 391         struct obd_device *obd = data;
 392
 393         if (obd == NULL)
 394                 return 0;
 395
 396         return snprintf(page, count, LPU64"\n",
 397                         obd->u.cli.cl_oscc.oscc_next_id);
 398 }
 399
 400 static int osc_rd_prealloc_last_id(char *page, char **start, off_t off,
 401                                    int count, int *eof, void *data)
 402 {
 403         struct obd_device *obd = data;
 404
 405         if (obd == NULL)
 406                 return 0;
 407
 408         return snprintf(page, count, LPU64"\n",
 409                         obd->u.cli.cl_oscc.oscc_last_id);
 410 }
 411
 412 static int osc_rd_checksum(char *page, char **start, off_t off, int count,
 413                            int *eof, void *data)
 414 {
 415         struct obd_device *obd = data;
 416
 417         if (obd == NULL)
 418                 return 0;
 419
 420         return snprintf(page, count, "%d\n",
 421                         obd->u.cli.cl_checksum ? 1 : 0);
 422 }
 423
 424 static int osc_wr_checksum(struct file *file, const char *buffer,
 425                            unsigned long count, void *data)
 426 {
 427         struct obd_device *obd = data;
 428         int val, rc;
 429
 430         if (obd == NULL)
 431                 return 0;
 432
 433         rc = lprocfs_write_helper(buffer, count, &val);
 434         if (rc)
 435                 return rc;
 436
 437         obd->u.cli.cl_checksum = (val ? 1 : 0);
 438
 439         return count;
 440 }
 441
 442 static int osc_rd_checksum_type(char *page, char **start, off_t off, int count,
 443                                 int *eof, void *data)
 444 {
 445         struct obd_device *obd = data;
 446         int i, len =0;
 447         DECLARE_CKSUM_NAME;
 448
 449         if (obd == NULL)
 450                 return 0;
 451
 452         for (i = 0; i < ARRAY_SIZE(cksum_name) && len < count; i++) {
 453                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 454                         continue;
 455                 if (obd->u.cli.cl_cksum_type == (1 << i))
 456                         len += snprintf(page + len, count - len, "[%s] ",
 457                                         cksum_name[i]);
 458                 else
 459                         len += snprintf(page + len, count - len, "%s ",
 460                                         cksum_name[i]);
 461         }
 462         if (len < count)
 463                 len += sprintf(page + len, "\n");
 464         return len;
 465 }
 466
 467 static int osc_wd_checksum_type(struct file *file, const char *buffer,
 468                                 unsigned long count, void *data)
 469 {
 470         struct obd_device *obd = data;
 471         int i;
 472         DECLARE_CKSUM_NAME;
 473         char kernbuf[10];
 474
 475         if (obd == NULL)
 476                 return 0;
 477
 478         if (count > sizeof(kernbuf) - 1)
 479                 return -EINVAL;
 480         if (copy_from_user(kernbuf, buffer, count))
 481                 return -EFAULT;
 482         if (count > 0 && kernbuf[count - 1] == '\n')
 483                 kernbuf[count - 1] = '\0';
 484         else
 485                 kernbuf[count] = '\0';
 486
 487         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 488                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 489                         continue;
 490                 if (!strcmp(kernbuf, cksum_name[i])) {
 491                        obd->u.cli.cl_cksum_type = 1 << i;
 492                        return count;
 493                 }
 494         }
 495         return -EINVAL;
 496 }
 497
 498 static int osc_rd_resend_count(char *page, char **start, off_t off, int count,
 499                                int *eof, void *data)
 500 {
 501         struct obd_device *obd = data;
 502
 503         return snprintf(page, count, "%u\n", atomic_read(&obd->u.cli.cl_resends));
 504 }
 505
 506 static int osc_wr_resend_count(struct file *file, const char *buffer,
 507                                unsigned long count, void *data)
 508 {
 509         struct obd_device *obd = data;
 510         int val, rc;
 511
 512         rc = lprocfs_write_helper(buffer, count, &val);
 513         if (rc)
 514                 return rc;
 515
 516         if (val < 0)
 517                return -EINVAL;
 518
 519         atomic_set(&obd->u.cli.cl_resends, val);
 520
 521         return count;
 522 }
 523
 524 static int osc_rd_destroys_in_flight(char *page, char **start, off_t off,
 525                                      int count, int *eof, void *data)
 526 {
 527         struct obd_device *obd = data;
 528         return snprintf(page, count, "%u\n",
 529                         atomic_read(&obd->u.cli.cl_destroy_in_flight));
 530 }
 531
 532 static struct lprocfs_vars lprocfs_osc_obd_vars[] = {
 533         { "uuid",            lprocfs_rd_uuid,        0, 0 },
 534         { "ping",            0, lprocfs_wr_ping,     0, 0, 0222 },
 535         { "connect_flags",   lprocfs_rd_connect_flags, 0, 0 },
 536         { "blocksize",       lprocfs_rd_blksize,     0, 0 },
 537         { "kbytestotal",     lprocfs_rd_kbytestotal, 0, 0 },
 538         { "kbytesfree",      lprocfs_rd_kbytesfree,  0, 0 },
 539         { "kbytesavail",     lprocfs_rd_kbytesavail, 0, 0 },
 540         { "filestotal",      lprocfs_rd_filestotal,  0, 0 },
 541         { "filesfree",       lprocfs_rd_filesfree,   0, 0 },
 542         //{ "filegroups",      lprocfs_rd_filegroups,  0, 0 },
 543         { "ost_server_uuid", lprocfs_rd_server_uuid, 0, 0 },
 544         { "ost_conn_uuid",   lprocfs_rd_conn_uuid, 0, 0 },
 545         { "active",          osc_rd_active,
 546                              osc_wr_active, 0 },
 547         { "max_pages_per_rpc", osc_rd_max_pages_per_rpc,
 548                                osc_wr_max_pages_per_rpc, 0 },
 549         { "max_rpcs_in_flight", osc_rd_max_rpcs_in_flight,
 550                                 osc_wr_max_rpcs_in_flight, 0 },
 551         { "destroys_in_flight", osc_rd_destroys_in_flight, 0, 0 },
 552         { "max_dirty_mb",    osc_rd_max_dirty_mb, osc_wr_max_dirty_mb, 0 },
 553         { "cur_dirty_bytes", osc_rd_cur_dirty_bytes, 0, 0 },
 554         { "cur_grant_bytes", osc_rd_cur_grant_bytes,
 555                              osc_wr_cur_grant_bytes, 0 },
 556         { "cur_lost_grant_bytes", osc_rd_cur_lost_grant_bytes, 0, 0},
 557         { "grant_shrink_interval", osc_rd_grant_shrink_interval,
 558                                    osc_wr_grant_shrink_interval, 0 },
 559         { "create_count",    osc_rd_create_count, osc_wr_create_count, 0 },
 560         { "max_create_count", osc_rd_max_create_count,
 561                               osc_wr_max_create_count, 0},
 562         { "prealloc_next_id", osc_rd_prealloc_next_id, 0, 0 },
 563         { "prealloc_last_id", osc_rd_prealloc_last_id, 0, 0 },
 564         { "checksums",       osc_rd_checksum, osc_wr_checksum, 0 },
 565         { "checksum_type",   osc_rd_checksum_type, osc_wd_checksum_type, 0 },
 566         { "resend_count",  osc_rd_resend_count, osc_wr_resend_count, 0},
 567         { "timeouts",        lprocfs_rd_timeouts,      0, 0 },
 568         { "import",          lprocfs_rd_import,    0, 0 },
 569         { "state",           lprocfs_rd_state,         0, 0 },
 570         { 0 }
 571 };
 572
 573 static struct lprocfs_vars lprocfs_osc_module_vars[] = {
 574         { "num_refs",        lprocfs_rd_numrefs,     0, 0 },
 575         { 0 }
 576 };
 577
 578 #define pct(a,b) (b ? a * 100 / b : 0)
 579
 580 static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 581 {
 582         struct timeval now;
 583         struct obd_device *dev = seq->private;
 584         struct client_obd *cli = &dev->u.cli;
 585         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 586         int i;
 587
 588         do_gettimeofday(&now);
 589
 590         client_obd_list_lock(&cli->cl_loi_list_lock);
 591
 592         seq_printf(seq, "snapshot_time:            %lu.%lu (secs.usecs)\n",
 593                    now.tv_sec, now.tv_usec);
 594         seq_printf(seq, "read RPCs in flight:      %d\n",
 595                    cli->cl_r_in_flight);
 596         seq_printf(seq, "write RPCs in flight:     %d\n",
 597                    cli->cl_w_in_flight);
 598         seq_printf(seq, "dio read RPCs in flight:  %d\n",
 599                    cli->cl_dio_r_in_flight);
 600         seq_printf(seq, "dio write RPCs in flight: %d\n",
 601                    cli->cl_dio_w_in_flight);
 602         seq_printf(seq, "pending write pages:      %d\n",
 603                    cli->cl_pending_w_pages);
 604         seq_printf(seq, "pending read pages:       %d\n",
 605                    cli->cl_pending_r_pages);
 606
 607         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 608         seq_printf(seq, "pages per rpc         rpcs   %% cum %% |");
 609         seq_printf(seq, "       rpcs   %% cum %%\n");
 610
 611         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 612         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 613
 614         read_cum = 0;
 615         write_cum = 0;
 616         for (i = 0; i < OBD_HIST_MAX; i++) {
 617                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 618                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 619                 read_cum += r;
 620                 write_cum += w;
 621                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 622                                  1 << i, r, pct(r, read_tot),
 623                                  pct(read_cum, read_tot), w,
 624                                  pct(w, write_tot),
 625                                  pct(write_cum, write_tot));
 626                 if (read_cum == read_tot && write_cum == write_tot)
 627                         break;
 628         }
 629
 630         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 631         seq_printf(seq, "rpcs in flight        rpcs   %% cum %% |");
 632         seq_printf(seq, "       rpcs   %% cum %%\n");
 633
 634         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 635         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
 636
 637         read_cum = 0;
 638         write_cum = 0;
 639         for (i = 0; i < OBD_HIST_MAX; i++) {
 640                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
 641                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
 642                 read_cum += r;
 643                 write_cum += w;
 644                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 645                                  i, r, pct(r, read_tot),
 646                                  pct(read_cum, read_tot), w,
 647                                  pct(w, write_tot),
 648                                  pct(write_cum, write_tot));
 649                 if (read_cum == read_tot && write_cum == write_tot)
 650                         break;
 651         }
 652
 653         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 654         seq_printf(seq, "offset                rpcs   %% cum %% |");
 655         seq_printf(seq, "       rpcs   %% cum %%\n");
 656
 657         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
 658         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist);
 659
 660         read_cum = 0;
 661         write_cum = 0;
 662         for (i = 0; i < OBD_HIST_MAX; i++) {
 663                 unsigned long r = cli->cl_read_offset_hist.oh_buckets[i];
 664                 unsigned long w = cli->cl_write_offset_hist.oh_buckets[i];
 665                 read_cum += r;
 666                 write_cum += w;
 667                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 668                            (i == 0) ? 0 : 1 << (i - 1),
 669                            r, pct(r, read_tot), pct(read_cum, read_tot),
 670                            w, pct(w, write_tot), pct(write_cum, write_tot));
 671                 if (read_cum == read_tot && write_cum == write_tot)
 672                         break;
 673         }
 674
 675         client_obd_list_unlock(&cli->cl_loi_list_lock);
 676
 677         return 0;
 678 }
 679 #undef pct
 680
 681 static ssize_t osc_rpc_stats_seq_write(struct file *file, const char *buf,
 682                                        size_t len, loff_t *off)
 683 {
 684         struct seq_file *seq = file->private_data;
 685         struct obd_device *dev = seq->private;
 686         struct client_obd *cli = &dev->u.cli;
 687
 688         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 689         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 690         lprocfs_oh_clear(&cli->cl_read_page_hist);
 691         lprocfs_oh_clear(&cli->cl_write_page_hist);
 692         lprocfs_oh_clear(&cli->cl_read_offset_hist);
 693         lprocfs_oh_clear(&cli->cl_write_offset_hist);
 694
 695         return len;
 696 }
 697
 698 LPROC_SEQ_FOPS(osc_rpc_stats);
 699
 700 int lproc_osc_attach_seqstat(struct obd_device *dev)
 701 {
 702         return lprocfs_obd_seq_create(dev, "rpc_stats", 0444,
 703                                       &osc_rpc_stats_fops, dev);
 704 }
 705
 706 void lprocfs_osc_init_vars(struct lprocfs_static_vars *lvars)
 707 {
 708         lvars->module_vars = lprocfs_osc_module_vars;
 709         lvars->obd_vars    = lprocfs_osc_obd_vars;
 710 }
 711 #endif /* LPROCFS */