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_adjust_max_dirty(cli);
 115         client_obd_list_unlock(&cli->cl_loi_list_lock);
 116
 117         LPROCFS_CLIMP_EXIT(dev);
 118         return count;
 119 }
 120
 121 static int osc_rd_max_dirty_mb(char *page, char **start, off_t off, int count,
 122                                int *eof, void *data)
 123 {
 124         struct obd_device *dev = data;
 125         struct client_obd *cli = &dev->u.cli;
 126         long val;
 127         int mult;
 128
 129         client_obd_list_lock(&cli->cl_loi_list_lock);
 130         val = cli->cl_dirty_max_pages;
 131         client_obd_list_unlock(&cli->cl_loi_list_lock);
 132
 133         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 134         return lprocfs_read_frac_helper(page, count, val, mult);
 135 }
 136
 137 static int osc_wr_max_dirty_mb(struct file *file, const char *buffer,
 138                                unsigned long count, void *data)
 139 {
 140         struct obd_device *dev = data;
 141         struct client_obd *cli = &dev->u.cli;
 142         int pages_number, mult, rc;
 143
 144         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 145         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 146         if (rc)
 147                 return rc;
 148
 149         if (pages_number <= 0 ||
 150             pages_number > OSC_MAX_DIRTY_MB_MAX << (20 - PAGE_CACHE_SHIFT) ||
 151             pages_number > totalram_pages / 4) /* 1/4 of RAM */
 152                 return -ERANGE;
 153
 154         client_obd_list_lock(&cli->cl_loi_list_lock);
 155         cli->cl_dirty_max_pages = pages_number;
 156         osc_wake_cache_waiters(cli);
 157         client_obd_list_unlock(&cli->cl_loi_list_lock);
 158
 159         return count;
 160 }
 161
 162 static int osc_rd_cached_mb(char *page, char **start, off_t off, int count,
 163                             int *eof, void *data)
 164 {
 165         struct obd_device *dev = data;
 166         struct client_obd *cli = &dev->u.cli;
 167         int shift = 20 - PAGE_CACHE_SHIFT;
 168         int rc;
 169
 170         rc = snprintf(page, count,
 171                       "used_mb: %d\n"
 172                       "busy_cnt: %d\n",
 173                       (cfs_atomic_read(&cli->cl_lru_in_list) +
 174                         cfs_atomic_read(&cli->cl_lru_busy)) >> shift,
 175                       cfs_atomic_read(&cli->cl_lru_busy));
 176
 177         return rc;
 178 }
 179
 180 /* shrink the number of caching pages to a specific number */
 181 static int osc_wr_cached_mb(struct file *file, const char *buffer,
 182                             unsigned long count, void *data)
 183 {
 184         struct obd_device *dev = data;
 185         struct client_obd *cli = &dev->u.cli;
 186         int pages_number, mult, rc;
 187
 188         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 189         buffer = lprocfs_find_named_value(buffer, "used_mb:", &count);
 190         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 191         if (rc)
 192                 return rc;
 193
 194         if (pages_number < 0)
 195                 return -ERANGE;
 196
 197         rc = cfs_atomic_read(&cli->cl_lru_in_list) - pages_number;
 198         if (rc > 0)
 199                 (void)osc_lru_shrink(cli, rc);
 200
 201         return count;
 202 }
 203
 204 static int osc_rd_cur_dirty_bytes(char *page, char **start, off_t off,
 205                                   int count, int *eof, void *data)
 206 {
 207         struct obd_device *dev = data;
 208         struct client_obd *cli = &dev->u.cli;
 209         int rc;
 210
 211         client_obd_list_lock(&cli->cl_loi_list_lock);
 212         rc = snprintf(page, count, "%lu\n",
 213                       cli->cl_dirty_pages << PAGE_CACHE_SHIFT);
 214         client_obd_list_unlock(&cli->cl_loi_list_lock);
 215         return rc;
 216 }
 217
 218 static int osc_rd_cur_grant_bytes(char *page, char **start, off_t off,
 219                                   int count, int *eof, void *data)
 220 {
 221         struct obd_device *dev = data;
 222         struct client_obd *cli = &dev->u.cli;
 223         int rc;
 224
 225         client_obd_list_lock(&cli->cl_loi_list_lock);
 226         rc = snprintf(page, count, "%lu\n", cli->cl_avail_grant);
 227         client_obd_list_unlock(&cli->cl_loi_list_lock);
 228         return rc;
 229 }
 230
 231 static int osc_wr_cur_grant_bytes(struct file *file, const char *buffer,
 232                                   unsigned long count, void *data)
 233 {
 234         struct obd_device *obd = data;
 235         struct client_obd *cli = &obd->u.cli;
 236         int                rc;
 237         __u64              val;
 238
 239         if (obd == NULL)
 240                 return 0;
 241
 242         rc = lprocfs_write_u64_helper(buffer, count, &val);
 243         if (rc)
 244                 return rc;
 245
 246         /* this is only for shrinking grant */
 247         client_obd_list_lock(&cli->cl_loi_list_lock);
 248         if (val >= cli->cl_avail_grant) {
 249                 client_obd_list_unlock(&cli->cl_loi_list_lock);
 250                 return 0;
 251         }
 252         client_obd_list_unlock(&cli->cl_loi_list_lock);
 253
 254         LPROCFS_CLIMP_CHECK(obd);
 255         if (cli->cl_import->imp_state == LUSTRE_IMP_FULL)
 256                 rc = osc_shrink_grant_to_target(cli, val);
 257         LPROCFS_CLIMP_EXIT(obd);
 258         if (rc)
 259                 return rc;
 260         return count;
 261 }
 262
 263 static int osc_rd_cur_lost_grant_bytes(char *page, char **start, off_t off,
 264                                        int count, int *eof, void *data)
 265 {
 266         struct obd_device *dev = data;
 267         struct client_obd *cli = &dev->u.cli;
 268         int rc;
 269
 270         client_obd_list_lock(&cli->cl_loi_list_lock);
 271         rc = snprintf(page, count, "%lu\n", cli->cl_lost_grant);
 272         client_obd_list_unlock(&cli->cl_loi_list_lock);
 273         return rc;
 274 }
 275
 276 static int osc_rd_grant_shrink_interval(char *page, char **start, off_t off,
 277                                         int count, int *eof, void *data)
 278 {
 279         struct obd_device *obd = data;
 280
 281         if (obd == NULL)
 282                 return 0;
 283         return snprintf(page, count, "%d\n",
 284                         obd->u.cli.cl_grant_shrink_interval);
 285 }
 286
 287 static int osc_wr_grant_shrink_interval(struct file *file, const char *buffer,
 288                                         unsigned long count, void *data)
 289 {
 290         struct obd_device *obd = data;
 291         int val, rc;
 292
 293         if (obd == NULL)
 294                 return 0;
 295
 296         rc = lprocfs_write_helper(buffer, count, &val);
 297         if (rc)
 298                 return rc;
 299
 300         if (val <= 0)
 301                 return -ERANGE;
 302
 303         obd->u.cli.cl_grant_shrink_interval = val;
 304
 305         return count;
 306 }
 307
 308 static int osc_rd_checksum(char *page, char **start, off_t off, int count,
 309                            int *eof, void *data)
 310 {
 311         struct obd_device *obd = data;
 312
 313         if (obd == NULL)
 314                 return 0;
 315
 316         return snprintf(page, count, "%d\n",
 317                         obd->u.cli.cl_checksum ? 1 : 0);
 318 }
 319
 320 static int osc_wr_checksum(struct file *file, const char *buffer,
 321                            unsigned long count, void *data)
 322 {
 323         struct obd_device *obd = data;
 324         int val, rc;
 325
 326         if (obd == NULL)
 327                 return 0;
 328
 329         rc = lprocfs_write_helper(buffer, count, &val);
 330         if (rc)
 331                 return rc;
 332
 333         obd->u.cli.cl_checksum = (val ? 1 : 0);
 334
 335         return count;
 336 }
 337
 338 static int osc_rd_checksum_type(char *page, char **start, off_t off, int count,
 339                                 int *eof, void *data)
 340 {
 341         struct obd_device *obd = data;
 342         int i, len =0;
 343         DECLARE_CKSUM_NAME;
 344
 345         if (obd == NULL)
 346                 return 0;
 347
 348         for (i = 0; i < ARRAY_SIZE(cksum_name) && len < count; i++) {
 349                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 350                         continue;
 351                 if (obd->u.cli.cl_cksum_type == (1 << i))
 352                         len += snprintf(page + len, count - len, "[%s] ",
 353                                         cksum_name[i]);
 354                 else
 355                         len += snprintf(page + len, count - len, "%s ",
 356                                         cksum_name[i]);
 357         }
 358         if (len < count)
 359                 len += sprintf(page + len, "\n");
 360         return len;
 361 }
 362
 363 static int osc_wd_checksum_type(struct file *file, const char *buffer,
 364                                 unsigned long count, void *data)
 365 {
 366         struct obd_device *obd = data;
 367         int i;
 368         DECLARE_CKSUM_NAME;
 369         char kernbuf[10];
 370
 371         if (obd == NULL)
 372                 return 0;
 373
 374         if (count > sizeof(kernbuf) - 1)
 375                 return -EINVAL;
 376         if (copy_from_user(kernbuf, buffer, count))
 377                 return -EFAULT;
 378         if (count > 0 && kernbuf[count - 1] == '\n')
 379                 kernbuf[count - 1] = '\0';
 380         else
 381                 kernbuf[count] = '\0';
 382
 383         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 384                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 385                         continue;
 386                 if (!strcmp(kernbuf, cksum_name[i])) {
 387                        obd->u.cli.cl_cksum_type = 1 << i;
 388                        return count;
 389                 }
 390         }
 391         return -EINVAL;
 392 }
 393
 394 static int osc_rd_resend_count(char *page, char **start, off_t off, int count,
 395                                int *eof, void *data)
 396 {
 397         struct obd_device *obd = data;
 398
 399         return snprintf(page, count, "%u\n",
 400                         cfs_atomic_read(&obd->u.cli.cl_resends));
 401 }
 402
 403 static int osc_wr_resend_count(struct file *file, const char *buffer,
 404                                unsigned long count, void *data)
 405 {
 406         struct obd_device *obd = data;
 407         int val, rc;
 408
 409         rc = lprocfs_write_helper(buffer, count, &val);
 410         if (rc)
 411                 return rc;
 412
 413         if (val < 0)
 414                return -EINVAL;
 415
 416         cfs_atomic_set(&obd->u.cli.cl_resends, val);
 417
 418         return count;
 419 }
 420
 421 static int osc_rd_contention_seconds(char *page, char **start, off_t off,
 422                                      int count, int *eof, void *data)
 423 {
 424         struct obd_device *obd = data;
 425         struct osc_device *od  = obd2osc_dev(obd);
 426
 427         return snprintf(page, count, "%u\n", od->od_contention_time);
 428 }
 429
 430 static int osc_wr_contention_seconds(struct file *file, const char *buffer,
 431                                      unsigned long count, void *data)
 432 {
 433         struct obd_device *obd = data;
 434         struct osc_device *od  = obd2osc_dev(obd);
 435
 436         return lprocfs_write_helper(buffer, count, &od->od_contention_time) ?:
 437                 count;
 438 }
 439
 440 static int osc_rd_lockless_truncate(char *page, char **start, off_t off,
 441                                     int count, int *eof, void *data)
 442 {
 443         struct obd_device *obd = data;
 444         struct osc_device *od  = obd2osc_dev(obd);
 445
 446         return snprintf(page, count, "%u\n", od->od_lockless_truncate);
 447 }
 448
 449 static int osc_wr_lockless_truncate(struct file *file, const char *buffer,
 450                                     unsigned long count, void *data)
 451 {
 452         struct obd_device *obd = data;
 453         struct osc_device *od  = obd2osc_dev(obd);
 454
 455         return lprocfs_write_helper(buffer, count, &od->od_lockless_truncate) ?:
 456                 count;
 457 }
 458
 459 static int osc_rd_destroys_in_flight(char *page, char **start, off_t off,
 460                                      int count, int *eof, void *data)
 461 {
 462         struct obd_device *obd = data;
 463         return snprintf(page, count, "%u\n",
 464                         cfs_atomic_read(&obd->u.cli.cl_destroy_in_flight));
 465 }
 466
 467 static int lprocfs_osc_wr_max_pages_per_rpc(struct file *file,
 468         const char *buffer, unsigned long count, void *data)
 469 {
 470         struct obd_device *dev = data;
 471         struct client_obd *cli = &dev->u.cli;
 472         struct obd_connect_data *ocd = &cli->cl_import->imp_connect_data;
 473         int chunk_mask, rc;
 474         __u64 val;
 475
 476         rc = lprocfs_write_u64_helper(buffer, count, &val);
 477         if (rc)
 478                 return rc;
 479
 480         /* if the max_pages is specified in bytes, convert to pages */
 481         if (val >= ONE_MB_BRW_SIZE)
 482                 val >>= PAGE_CACHE_SHIFT;
 483
 484         LPROCFS_CLIMP_CHECK(dev);
 485
 486         chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_CACHE_SHIFT)) - 1);
 487         /* max_pages_per_rpc must be chunk aligned */
 488         val = (val + ~chunk_mask) & chunk_mask;
 489         if (val == 0 || val > ocd->ocd_brw_size >> PAGE_CACHE_SHIFT) {
 490                 LPROCFS_CLIMP_EXIT(dev);
 491                 return -ERANGE;
 492         }
 493         client_obd_list_lock(&cli->cl_loi_list_lock);
 494         cli->cl_max_pages_per_rpc = val;
 495         client_adjust_max_dirty(cli);
 496         client_obd_list_unlock(&cli->cl_loi_list_lock);
 497
 498         LPROCFS_CLIMP_EXIT(dev);
 499         return count;
 500 }
 501
 502 static struct lprocfs_vars lprocfs_osc_obd_vars[] = {
 503         { "uuid",            lprocfs_rd_uuid,        0, 0 },
 504         { "ping",            0, lprocfs_wr_ping,     0, 0, 0222 },
 505         { "connect_flags",   lprocfs_rd_connect_flags, 0, 0 },
 506         { "blocksize",       lprocfs_rd_blksize,     0, 0 },
 507         { "kbytestotal",     lprocfs_rd_kbytestotal, 0, 0 },
 508         { "kbytesfree",      lprocfs_rd_kbytesfree,  0, 0 },
 509         { "kbytesavail",     lprocfs_rd_kbytesavail, 0, 0 },
 510         { "filestotal",      lprocfs_rd_filestotal,  0, 0 },
 511         { "filesfree",       lprocfs_rd_filesfree,   0, 0 },
 512         //{ "filegroups",      lprocfs_rd_filegroups,  0, 0 },
 513         { "ost_server_uuid", lprocfs_rd_server_uuid, 0, 0 },
 514         { "ost_conn_uuid",   lprocfs_rd_conn_uuid, 0, 0 },
 515         { "active",          osc_rd_active,
 516                              osc_wr_active, 0 },
 517         { "max_pages_per_rpc", lprocfs_obd_rd_max_pages_per_rpc,
 518                                lprocfs_osc_wr_max_pages_per_rpc, 0 },
 519         { "max_rpcs_in_flight", osc_rd_max_rpcs_in_flight,
 520                                 osc_wr_max_rpcs_in_flight, 0 },
 521         { "destroys_in_flight", osc_rd_destroys_in_flight, 0, 0 },
 522         { "max_dirty_mb",    osc_rd_max_dirty_mb, osc_wr_max_dirty_mb, 0 },
 523         { "osc_cached_mb",   osc_rd_cached_mb,     osc_wr_cached_mb, 0 },
 524         { "cur_dirty_bytes", osc_rd_cur_dirty_bytes, 0, 0 },
 525         { "cur_grant_bytes", osc_rd_cur_grant_bytes,
 526                              osc_wr_cur_grant_bytes, 0 },
 527         { "cur_lost_grant_bytes", osc_rd_cur_lost_grant_bytes, 0, 0},
 528         { "grant_shrink_interval", osc_rd_grant_shrink_interval,
 529                                    osc_wr_grant_shrink_interval, 0 },
 530         { "checksums",       osc_rd_checksum, osc_wr_checksum, 0 },
 531         { "checksum_type",   osc_rd_checksum_type, osc_wd_checksum_type, 0 },
 532         { "resend_count",    osc_rd_resend_count, osc_wr_resend_count, 0},
 533         { "timeouts",        lprocfs_rd_timeouts,      0, 0 },
 534         { "contention_seconds", osc_rd_contention_seconds,
 535                                 osc_wr_contention_seconds, 0 },
 536         { "lockless_truncate",  osc_rd_lockless_truncate,
 537                                 osc_wr_lockless_truncate, 0 },
 538         { "import",          lprocfs_rd_import,        lprocfs_wr_import, 0 },
 539         { "state",           lprocfs_rd_state,         0, 0 },
 540         { "pinger_recov",    lprocfs_rd_pinger_recov,
 541                              lprocfs_wr_pinger_recov,  0, 0 },
 542         { 0 }
 543 };
 544
 545 static struct lprocfs_vars lprocfs_osc_module_vars[] = {
 546         { "num_refs",        lprocfs_rd_numrefs,     0, 0 },
 547         { 0 }
 548 };
 549
 550 #define pct(a,b) (b ? a * 100 / b : 0)
 551
 552 static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 553 {
 554         struct timeval now;
 555         struct obd_device *dev = seq->private;
 556         struct client_obd *cli = &dev->u.cli;
 557         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 558         int i;
 559
 560         do_gettimeofday(&now);
 561
 562         client_obd_list_lock(&cli->cl_loi_list_lock);
 563
 564         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 565                    now.tv_sec, now.tv_usec);
 566         seq_printf(seq, "read RPCs in flight:  %d\n",
 567                    cli->cl_r_in_flight);
 568         seq_printf(seq, "write RPCs in flight: %d\n",
 569                    cli->cl_w_in_flight);
 570         seq_printf(seq, "pending write pages:  %d\n",
 571                    cfs_atomic_read(&cli->cl_pending_w_pages));
 572         seq_printf(seq, "pending read pages:   %d\n",
 573                    cfs_atomic_read(&cli->cl_pending_r_pages));
 574
 575         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 576         seq_printf(seq, "pages per rpc         rpcs   %% cum %% |");
 577         seq_printf(seq, "       rpcs   %% cum %%\n");
 578
 579         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 580         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 581
 582         read_cum = 0;
 583         write_cum = 0;
 584         for (i = 0; i < OBD_HIST_MAX; i++) {
 585                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 586                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 587                 read_cum += r;
 588                 write_cum += w;
 589                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 590                                  1 << i, r, pct(r, read_tot),
 591                                  pct(read_cum, read_tot), w,
 592                                  pct(w, write_tot),
 593                                  pct(write_cum, write_tot));
 594                 if (read_cum == read_tot && write_cum == write_tot)
 595                         break;
 596         }
 597
 598         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 599         seq_printf(seq, "rpcs in flight        rpcs   %% cum %% |");
 600         seq_printf(seq, "       rpcs   %% cum %%\n");
 601
 602         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 603         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_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_rpc_hist.oh_buckets[i];
 609                 unsigned long w = cli->cl_write_rpc_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                                  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, "offset                rpcs   %% cum %% |");
 623         seq_printf(seq, "       rpcs   %% cum %%\n");
 624
 625         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
 626         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_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_offset_hist.oh_buckets[i];
 632                 unsigned long w = cli->cl_write_offset_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 == 0) ? 0 : 1 << (i - 1),
 637                            r, pct(r, read_tot), pct(read_cum, read_tot),
 638                            w, pct(w, write_tot), pct(write_cum, write_tot));
 639                 if (read_cum == read_tot && write_cum == write_tot)
 640                         break;
 641         }
 642
 643         client_obd_list_unlock(&cli->cl_loi_list_lock);
 644
 645         return 0;
 646 }
 647 #undef pct
 648
 649 static ssize_t osc_rpc_stats_seq_write(struct file *file, const char *buf,
 650                                        size_t len, loff_t *off)
 651 {
 652         struct seq_file *seq = file->private_data;
 653         struct obd_device *dev = seq->private;
 654         struct client_obd *cli = &dev->u.cli;
 655
 656         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 657         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 658         lprocfs_oh_clear(&cli->cl_read_page_hist);
 659         lprocfs_oh_clear(&cli->cl_write_page_hist);
 660         lprocfs_oh_clear(&cli->cl_read_offset_hist);
 661         lprocfs_oh_clear(&cli->cl_write_offset_hist);
 662
 663         return len;
 664 }
 665
 666 LPROC_SEQ_FOPS(osc_rpc_stats);
 667
 668 static int osc_stats_seq_show(struct seq_file *seq, void *v)
 669 {
 670         struct timeval now;
 671         struct obd_device *dev = seq->private;
 672         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 673
 674         do_gettimeofday(&now);
 675
 676         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 677                    now.tv_sec, now.tv_usec);
 678         seq_printf(seq, "lockless_write_bytes\t\t"LPU64"\n",
 679                    stats->os_lockless_writes);
 680         seq_printf(seq, "lockless_read_bytes\t\t"LPU64"\n",
 681                    stats->os_lockless_reads);
 682         seq_printf(seq, "lockless_truncate\t\t"LPU64"\n",
 683                    stats->os_lockless_truncates);
 684         return 0;
 685 }
 686
 687 static ssize_t osc_stats_seq_write(struct file *file, const char *buf,
 688                                    size_t len, loff_t *off)
 689 {
 690         struct seq_file *seq = file->private_data;
 691         struct obd_device *dev = seq->private;
 692         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 693
 694         memset(stats, 0, sizeof(*stats));
 695         return len;
 696 }
 697
 698 LPROC_SEQ_FOPS(osc_stats);
 699
 700 int lproc_osc_attach_seqstat(struct obd_device *dev)
 701 {
 702         int rc;
 703
 704         rc = lprocfs_seq_create(dev->obd_proc_entry, "osc_stats", 0644,
 705                                 &osc_stats_fops, dev);
 706         if (rc == 0)
 707                 rc = lprocfs_obd_seq_create(dev, "rpc_stats", 0644,
 708                                             &osc_rpc_stats_fops, dev);
 709
 710         return rc;
 711 }
 712
 713 void lprocfs_osc_init_vars(struct lprocfs_static_vars *lvars)
 714 {
 715         lvars->module_vars = lprocfs_osc_module_vars;
 716         lvars->obd_vars    = lprocfs_osc_obd_vars;
 717 }
 718 #endif /* LPROCFS */