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  2008 Sun Microsystems, Inc. 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_grant_shrink_interval(char *page, char **start, off_t off,
 259                                         int count, int *eof, void *data)
 260 {
 261         struct obd_device *obd = data;
 262
 263         if (obd == NULL)
 264                 return 0;
 265         return snprintf(page, count, "%d\n",
 266                         obd->u.cli.cl_grant_shrink_interval);
 267 }
 268
 269 static int osc_wr_grant_shrink_interval(struct file *file, const char *buffer,
 270                                         unsigned long count, void *data)
 271 {
 272         struct obd_device *obd = data;
 273         int val, rc;
 274
 275         if (obd == NULL)
 276                 return 0;
 277
 278         rc = lprocfs_write_helper(buffer, count, &val);
 279         if (rc)
 280                 return rc;
 281
 282         if (val <= 0)
 283                 return -ERANGE;
 284
 285         obd->u.cli.cl_grant_shrink_interval = val;
 286
 287         return count;
 288 }
 289
 290 static int osc_rd_create_count(char *page, char **start, off_t off, int count,
 291                                int *eof, void *data)
 292 {
 293         struct obd_device *obd = data;
 294
 295         if (obd == NULL)
 296                 return 0;
 297
 298         return snprintf(page, count, "%d\n",
 299                         obd->u.cli.cl_oscc.oscc_grow_count);
 300 }
 301
 302 static int osc_wr_create_count(struct file *file, const char *buffer,
 303                                unsigned long count, void *data)
 304 {
 305         struct obd_device *obd = data;
 306         int val, rc, i;
 307
 308         if (obd == NULL)
 309                 return 0;
 310
 311         rc = lprocfs_write_helper(buffer, count, &val);
 312         if (rc)
 313                 return rc;
 314
 315         /* The MDT ALWAYS needs to limit the precreate count to
 316          * OST_MAX_PRECREATE, and the constant cannot be changed
 317          * because it is a value shared between the OSC and OST
 318          * that is the maximum possible number of objects that will
 319          * ever be handled by MDT->OST recovery processing.
 320          *
 321          * If the OST ever gets a request to delete more orphans,
 322          * this implies that something has gone badly on the MDT
 323          * and the OST will refuse to delete so much data from the
 324          * filesystem as a safety measure. */
 325         if (val < OST_MIN_PRECREATE || val > OST_MAX_PRECREATE)
 326                 return -ERANGE;
 327         if (val > obd->u.cli.cl_oscc.oscc_max_grow_count)
 328                 return -ERANGE;
 329
 330         for (i = 1; (i << 1) <= val; i <<= 1)
 331                 ;
 332         obd->u.cli.cl_oscc.oscc_grow_count = i;
 333
 334         return count;
 335 }
 336
 337 static int osc_rd_max_create_count(char *page, char **start, off_t off,
 338                                    int count, int *eof, void *data)
 339 {
 340         struct obd_device *obd = data;
 341
 342         if (obd == NULL)
 343                 return 0;
 344
 345         return snprintf(page, count, "%d\n",
 346                         obd->u.cli.cl_oscc.oscc_max_grow_count);
 347 }
 348
 349 static int osc_wr_max_create_count(struct file *file, const char *buffer,
 350                                    unsigned long count, void *data)
 351 {
 352         struct obd_device *obd = data;
 353         int val, rc;
 354
 355         if (obd == NULL)
 356                 return 0;
 357
 358         rc = lprocfs_write_helper(buffer, count, &val);
 359         if (rc)
 360                 return rc;
 361
 362         if (val < 0)
 363                 return -ERANGE;
 364         if (val > OST_MAX_PRECREATE)
 365                 return -ERANGE;
 366
 367         if (obd->u.cli.cl_oscc.oscc_grow_count > val)
 368                 obd->u.cli.cl_oscc.oscc_grow_count = val;
 369
 370         obd->u.cli.cl_oscc.oscc_max_grow_count = val;
 371
 372         return count;
 373 }
 374
 375 static int osc_rd_prealloc_next_id(char *page, char **start, off_t off,
 376                                    int count, int *eof, void *data)
 377 {
 378         struct obd_device *obd = data;
 379
 380         if (obd == NULL)
 381                 return 0;
 382
 383         return snprintf(page, count, LPU64"\n",
 384                         obd->u.cli.cl_oscc.oscc_next_id);
 385 }
 386
 387 static int osc_rd_prealloc_last_id(char *page, char **start, off_t off,
 388                                    int count, int *eof, void *data)
 389 {
 390         struct obd_device *obd = data;
 391
 392         if (obd == NULL)
 393                 return 0;
 394
 395         return snprintf(page, count, LPU64"\n",
 396                         obd->u.cli.cl_oscc.oscc_last_id);
 397 }
 398
 399 static int osc_rd_checksum(char *page, char **start, off_t off, int count,
 400                            int *eof, void *data)
 401 {
 402         struct obd_device *obd = data;
 403
 404         if (obd == NULL)
 405                 return 0;
 406
 407         return snprintf(page, count, "%d\n",
 408                         obd->u.cli.cl_checksum ? 1 : 0);
 409 }
 410
 411 static int osc_wr_checksum(struct file *file, const char *buffer,
 412                            unsigned long count, void *data)
 413 {
 414         struct obd_device *obd = data;
 415         int val, rc;
 416
 417         if (obd == NULL)
 418                 return 0;
 419
 420         rc = lprocfs_write_helper(buffer, count, &val);
 421         if (rc)
 422                 return rc;
 423
 424         obd->u.cli.cl_checksum = (val ? 1 : 0);
 425
 426         return count;
 427 }
 428
 429 static int osc_rd_checksum_type(char *page, char **start, off_t off, int count,
 430                                 int *eof, void *data)
 431 {
 432         struct obd_device *obd = data;
 433         int i, len =0;
 434         DECLARE_CKSUM_NAME;
 435
 436         if (obd == NULL)
 437                 return 0;
 438
 439         for (i = 0; i < ARRAY_SIZE(cksum_name) && len < count; i++) {
 440                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 441                         continue;
 442                 if (obd->u.cli.cl_cksum_type == (1 << i))
 443                         len += snprintf(page + len, count - len, "[%s] ",
 444                                         cksum_name[i]);
 445                 else
 446                         len += snprintf(page + len, count - len, "%s ",
 447                                         cksum_name[i]);
 448         }
 449         if (len < count)
 450                 len += sprintf(page + len, "\n");
 451         return len;
 452 }
 453
 454 static int osc_wd_checksum_type(struct file *file, const char *buffer,
 455                                 unsigned long count, void *data)
 456 {
 457         struct obd_device *obd = data;
 458         int i;
 459         DECLARE_CKSUM_NAME;
 460         char kernbuf[10];
 461
 462         if (obd == NULL)
 463                 return 0;
 464
 465         if (count > sizeof(kernbuf) - 1)
 466                 return -EINVAL;
 467         if (copy_from_user(kernbuf, buffer, count))
 468                 return -EFAULT;
 469         if (count > 0 && kernbuf[count - 1] == '\n')
 470                 kernbuf[count - 1] = '\0';
 471         else
 472                 kernbuf[count] = '\0';
 473
 474         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 475                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 476                         continue;
 477                 if (!strcmp(kernbuf, cksum_name[i])) {
 478                        obd->u.cli.cl_cksum_type = 1 << i;
 479                        return count;
 480                 }
 481         }
 482         return -EINVAL;
 483 }
 484
 485 static int osc_rd_resend_count(char *page, char **start, off_t off, int count,
 486                                int *eof, void *data)
 487 {
 488         struct obd_device *obd = data;
 489
 490         return snprintf(page, count, "%u\n", atomic_read(&obd->u.cli.cl_resends));
 491 }
 492
 493 static int osc_wr_resend_count(struct file *file, const char *buffer,
 494                                unsigned long count, void *data)
 495 {
 496         struct obd_device *obd = data;
 497         int val, rc;
 498
 499         rc = lprocfs_write_helper(buffer, count, &val);
 500         if (rc)
 501                 return rc;
 502
 503         if (val < 0)
 504                return -EINVAL;
 505
 506         atomic_set(&obd->u.cli.cl_resends, val);
 507
 508         return count;
 509 }
 510
 511 static struct lprocfs_vars lprocfs_osc_obd_vars[] = {
 512         { "uuid",            lprocfs_rd_uuid,        0, 0 },
 513         { "ping",            0, lprocfs_wr_ping,     0, 0, 0222 },
 514         { "connect_flags",   lprocfs_rd_connect_flags, 0, 0 },
 515         { "blocksize",       lprocfs_rd_blksize,     0, 0 },
 516         { "kbytestotal",     lprocfs_rd_kbytestotal, 0, 0 },
 517         { "kbytesfree",      lprocfs_rd_kbytesfree,  0, 0 },
 518         { "kbytesavail",     lprocfs_rd_kbytesavail, 0, 0 },
 519         { "filestotal",      lprocfs_rd_filestotal,  0, 0 },
 520         { "filesfree",       lprocfs_rd_filesfree,   0, 0 },
 521         //{ "filegroups",      lprocfs_rd_filegroups,  0, 0 },
 522         { "ost_server_uuid", lprocfs_rd_server_uuid, 0, 0 },
 523         { "ost_conn_uuid",   lprocfs_rd_conn_uuid, 0, 0 },
 524         { "active",          osc_rd_active,
 525                              osc_wr_active, 0 },
 526         { "max_pages_per_rpc", osc_rd_max_pages_per_rpc,
 527                                osc_wr_max_pages_per_rpc, 0 },
 528         { "max_rpcs_in_flight", osc_rd_max_rpcs_in_flight,
 529                                 osc_wr_max_rpcs_in_flight, 0 },
 530         { "max_dirty_mb",    osc_rd_max_dirty_mb, osc_wr_max_dirty_mb, 0 },
 531         { "cur_dirty_bytes", osc_rd_cur_dirty_bytes, 0, 0 },
 532         { "cur_grant_bytes", osc_rd_cur_grant_bytes,
 533                              osc_wr_cur_grant_bytes, 0 },
 534         { "grant_shrink_interval", osc_rd_grant_shrink_interval,
 535                                    osc_wr_grant_shrink_interval, 0 },
 536         { "create_count",    osc_rd_create_count, osc_wr_create_count, 0 },
 537         { "max_create_count", osc_rd_max_create_count,
 538                               osc_wr_max_create_count, 0},
 539         { "prealloc_next_id", osc_rd_prealloc_next_id, 0, 0 },
 540         { "prealloc_last_id", osc_rd_prealloc_last_id, 0, 0 },
 541         { "checksums",       osc_rd_checksum, osc_wr_checksum, 0 },
 542         { "checksum_type",   osc_rd_checksum_type, osc_wd_checksum_type, 0 },
 543         { "resend_count",  osc_rd_resend_count, osc_wr_resend_count, 0},
 544         { "quota_resend_count",  lprocfs_rd_quota_resend_count,
 545                                  lprocfs_wr_quota_resend_count, 0},
 546         { "timeouts",        lprocfs_rd_timeouts,      0, 0 },
 547         { "import",          lprocfs_rd_import,    0, 0 },
 548         { "state",           lprocfs_rd_state,         0, 0 },
 549         { 0 }
 550 };
 551
 552 static struct lprocfs_vars lprocfs_osc_module_vars[] = {
 553         { "num_refs",        lprocfs_rd_numrefs,     0, 0 },
 554         { 0 }
 555 };
 556
 557 #define pct(a,b) (b ? a * 100 / b : 0)
 558
 559 static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 560 {
 561         struct timeval now;
 562         struct obd_device *dev = seq->private;
 563         struct client_obd *cli = &dev->u.cli;
 564         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 565         int i;
 566
 567         do_gettimeofday(&now);
 568
 569         client_obd_list_lock(&cli->cl_loi_list_lock);
 570
 571         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 572                    now.tv_sec, now.tv_usec);
 573         seq_printf(seq, "read RPCs in flight:  %d\n",
 574                    cli->cl_r_in_flight);
 575         seq_printf(seq, "write RPCs in flight: %d\n",
 576                    cli->cl_w_in_flight);
 577         seq_printf(seq, "pending write pages:  %d\n",
 578                    cli->cl_pending_w_pages);
 579         seq_printf(seq, "pending read pages:   %d\n",
 580                    cli->cl_pending_r_pages);
 581
 582         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 583         seq_printf(seq, "pages per rpc         rpcs   %% cum %% |");
 584         seq_printf(seq, "       rpcs   %% cum %%\n");
 585
 586         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 587         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 588
 589         read_cum = 0;
 590         write_cum = 0;
 591         for (i = 0; i < OBD_HIST_MAX; i++) {
 592                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 593                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 594                 read_cum += r;
 595                 write_cum += w;
 596                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 597                                  1 << i, r, pct(r, read_tot),
 598                                  pct(read_cum, read_tot), w,
 599                                  pct(w, write_tot),
 600                                  pct(write_cum, write_tot));
 601                 if (read_cum == read_tot && write_cum == write_tot)
 602                         break;
 603         }
 604
 605         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 606         seq_printf(seq, "rpcs in flight        rpcs   %% cum %% |");
 607         seq_printf(seq, "       rpcs   %% cum %%\n");
 608
 609         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 610         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
 611
 612         read_cum = 0;
 613         write_cum = 0;
 614         for (i = 0; i < OBD_HIST_MAX; i++) {
 615                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
 616                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
 617                 read_cum += r;
 618                 write_cum += w;
 619                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 620                                  i, r, pct(r, read_tot),
 621                                  pct(read_cum, read_tot), w,
 622                                  pct(w, write_tot),
 623                                  pct(write_cum, write_tot));
 624                 if (read_cum == read_tot && write_cum == write_tot)
 625                         break;
 626         }
 627
 628         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 629         seq_printf(seq, "offset                rpcs   %% cum %% |");
 630         seq_printf(seq, "       rpcs   %% cum %%\n");
 631
 632         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
 633         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist);
 634
 635         read_cum = 0;
 636         write_cum = 0;
 637         for (i = 0; i < OBD_HIST_MAX; i++) {
 638                 unsigned long r = cli->cl_read_offset_hist.oh_buckets[i];
 639                 unsigned long w = cli->cl_write_offset_hist.oh_buckets[i];
 640                 read_cum += r;
 641                 write_cum += w;
 642                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 643                            (i == 0) ? 0 : 1 << (i - 1),
 644                            r, pct(r, read_tot), pct(read_cum, read_tot),
 645                            w, pct(w, write_tot), pct(write_cum, write_tot));
 646                 if (read_cum == read_tot && write_cum == write_tot)
 647                         break;
 648         }
 649
 650         client_obd_list_unlock(&cli->cl_loi_list_lock);
 651
 652         return 0;
 653 }
 654 #undef pct
 655
 656 static ssize_t osc_rpc_stats_seq_write(struct file *file, const char *buf,
 657                                        size_t len, loff_t *off)
 658 {
 659         struct seq_file *seq = file->private_data;
 660         struct obd_device *dev = seq->private;
 661         struct client_obd *cli = &dev->u.cli;
 662
 663         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 664         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 665         lprocfs_oh_clear(&cli->cl_read_page_hist);
 666         lprocfs_oh_clear(&cli->cl_write_page_hist);
 667         lprocfs_oh_clear(&cli->cl_read_offset_hist);
 668         lprocfs_oh_clear(&cli->cl_write_offset_hist);
 669
 670         return len;
 671 }
 672
 673 LPROC_SEQ_FOPS(osc_rpc_stats);
 674
 675 int lproc_osc_attach_seqstat(struct obd_device *dev)
 676 {
 677         return lprocfs_obd_seq_create(dev, "rpc_stats", 0444,
 678                                       &osc_rpc_stats_fops, dev);
 679 }
 680
 681 void lprocfs_osc_init_vars(struct lprocfs_static_vars *lvars)
 682 {
 683         lvars->module_vars = lprocfs_osc_module_vars;
 684         lvars->obd_vars    = lprocfs_osc_obd_vars;
 685 }
 686 #endif /* LPROCFS */