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, 2012, 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 - CFS_PAGE_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 - CFS_PAGE_SHIFT) ||
 150             pages_number > cfs_num_physpages / 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 << CFS_PAGE_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 - CFS_PAGE_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 - CFS_PAGE_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                 (void)osc_lru_shrink(cli, rc);
 199
 200         return count;
 201 }
 202
 203 static int osc_rd_cur_dirty_bytes(char *page, char **start, off_t off,
 204                                   int count, int *eof, void *data)
 205 {
 206         struct obd_device *dev = data;
 207         struct client_obd *cli = &dev->u.cli;
 208         int rc;
 209
 210         client_obd_list_lock(&cli->cl_loi_list_lock);
 211         rc = snprintf(page, count, "%lu\n", cli->cl_dirty);
 212         client_obd_list_unlock(&cli->cl_loi_list_lock);
 213         return rc;
 214 }
 215
 216 static int osc_rd_cur_grant_bytes(char *page, char **start, off_t off,
 217                                   int count, int *eof, void *data)
 218 {
 219         struct obd_device *dev = data;
 220         struct client_obd *cli = &dev->u.cli;
 221         int rc;
 222
 223         client_obd_list_lock(&cli->cl_loi_list_lock);
 224         rc = snprintf(page, count, "%lu\n", cli->cl_avail_grant);
 225         client_obd_list_unlock(&cli->cl_loi_list_lock);
 226         return rc;
 227 }
 228
 229 static int osc_wr_cur_grant_bytes(struct file *file, const char *buffer,
 230                                   unsigned long count, void *data)
 231 {
 232         struct obd_device *obd = data;
 233         struct client_obd *cli = &obd->u.cli;
 234         int                rc;
 235         __u64              val;
 236
 237         if (obd == NULL)
 238                 return 0;
 239
 240         rc = lprocfs_write_u64_helper(buffer, count, &val);
 241         if (rc)
 242                 return rc;
 243
 244         /* this is only for shrinking grant */
 245         client_obd_list_lock(&cli->cl_loi_list_lock);
 246         if (val >= cli->cl_avail_grant) {
 247                 client_obd_list_unlock(&cli->cl_loi_list_lock);
 248                 return 0;
 249         }
 250         client_obd_list_unlock(&cli->cl_loi_list_lock);
 251
 252         LPROCFS_CLIMP_CHECK(obd);
 253         if (cli->cl_import->imp_state == LUSTRE_IMP_FULL)
 254                 rc = osc_shrink_grant_to_target(cli, val);
 255         LPROCFS_CLIMP_EXIT(obd);
 256         if (rc)
 257                 return rc;
 258         return count;
 259 }
 260
 261 static int osc_rd_cur_lost_grant_bytes(char *page, char **start, off_t off,
 262                                        int count, int *eof, void *data)
 263 {
 264         struct obd_device *dev = data;
 265         struct client_obd *cli = &dev->u.cli;
 266         int rc;
 267
 268         client_obd_list_lock(&cli->cl_loi_list_lock);
 269         rc = snprintf(page, count, "%lu\n", cli->cl_lost_grant);
 270         client_obd_list_unlock(&cli->cl_loi_list_lock);
 271         return rc;
 272 }
 273
 274 static int osc_rd_grant_shrink_interval(char *page, char **start, off_t off,
 275                                         int count, int *eof, void *data)
 276 {
 277         struct obd_device *obd = data;
 278
 279         if (obd == NULL)
 280                 return 0;
 281         return snprintf(page, count, "%d\n",
 282                         obd->u.cli.cl_grant_shrink_interval);
 283 }
 284
 285 static int osc_wr_grant_shrink_interval(struct file *file, const char *buffer,
 286                                         unsigned long count, void *data)
 287 {
 288         struct obd_device *obd = data;
 289         int val, rc;
 290
 291         if (obd == NULL)
 292                 return 0;
 293
 294         rc = lprocfs_write_helper(buffer, count, &val);
 295         if (rc)
 296                 return rc;
 297
 298         if (val <= 0)
 299                 return -ERANGE;
 300
 301         obd->u.cli.cl_grant_shrink_interval = val;
 302
 303         return count;
 304 }
 305
 306 static int osc_rd_checksum(char *page, char **start, off_t off, int count,
 307                            int *eof, void *data)
 308 {
 309         struct obd_device *obd = data;
 310
 311         if (obd == NULL)
 312                 return 0;
 313
 314         return snprintf(page, count, "%d\n",
 315                         obd->u.cli.cl_checksum ? 1 : 0);
 316 }
 317
 318 static int osc_wr_checksum(struct file *file, const char *buffer,
 319                            unsigned long count, void *data)
 320 {
 321         struct obd_device *obd = data;
 322         int val, rc;
 323
 324         if (obd == NULL)
 325                 return 0;
 326
 327         rc = lprocfs_write_helper(buffer, count, &val);
 328         if (rc)
 329                 return rc;
 330
 331         obd->u.cli.cl_checksum = (val ? 1 : 0);
 332
 333         return count;
 334 }
 335
 336 static int osc_rd_checksum_type(char *page, char **start, off_t off, int count,
 337                                 int *eof, void *data)
 338 {
 339         struct obd_device *obd = data;
 340         int i, len =0;
 341         DECLARE_CKSUM_NAME;
 342
 343         if (obd == NULL)
 344                 return 0;
 345
 346         for (i = 0; i < ARRAY_SIZE(cksum_name) && len < count; i++) {
 347                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 348                         continue;
 349                 if (obd->u.cli.cl_cksum_type == (1 << i))
 350                         len += snprintf(page + len, count - len, "[%s] ",
 351                                         cksum_name[i]);
 352                 else
 353                         len += snprintf(page + len, count - len, "%s ",
 354                                         cksum_name[i]);
 355         }
 356         if (len < count)
 357                 len += sprintf(page + len, "\n");
 358         return len;
 359 }
 360
 361 static int osc_wd_checksum_type(struct file *file, const char *buffer,
 362                                 unsigned long count, void *data)
 363 {
 364         struct obd_device *obd = data;
 365         int i;
 366         DECLARE_CKSUM_NAME;
 367         char kernbuf[10];
 368
 369         if (obd == NULL)
 370                 return 0;
 371
 372         if (count > sizeof(kernbuf) - 1)
 373                 return -EINVAL;
 374         if (cfs_copy_from_user(kernbuf, buffer, count))
 375                 return -EFAULT;
 376         if (count > 0 && kernbuf[count - 1] == '\n')
 377                 kernbuf[count - 1] = '\0';
 378         else
 379                 kernbuf[count] = '\0';
 380
 381         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 382                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 383                         continue;
 384                 if (!strcmp(kernbuf, cksum_name[i])) {
 385                        obd->u.cli.cl_cksum_type = 1 << i;
 386                        return count;
 387                 }
 388         }
 389         return -EINVAL;
 390 }
 391
 392 static int osc_rd_resend_count(char *page, char **start, off_t off, int count,
 393                                int *eof, void *data)
 394 {
 395         struct obd_device *obd = data;
 396
 397         return snprintf(page, count, "%u\n",
 398                         cfs_atomic_read(&obd->u.cli.cl_resends));
 399 }
 400
 401 static int osc_wr_resend_count(struct file *file, const char *buffer,
 402                                unsigned long count, void *data)
 403 {
 404         struct obd_device *obd = data;
 405         int val, rc;
 406
 407         rc = lprocfs_write_helper(buffer, count, &val);
 408         if (rc)
 409                 return rc;
 410
 411         if (val < 0)
 412                return -EINVAL;
 413
 414         cfs_atomic_set(&obd->u.cli.cl_resends, val);
 415
 416         return count;
 417 }
 418
 419 static int osc_rd_contention_seconds(char *page, char **start, off_t off,
 420                                      int count, int *eof, void *data)
 421 {
 422         struct obd_device *obd = data;
 423         struct osc_device *od  = obd2osc_dev(obd);
 424
 425         return snprintf(page, count, "%u\n", od->od_contention_time);
 426 }
 427
 428 static int osc_wr_contention_seconds(struct file *file, const char *buffer,
 429                                      unsigned long count, void *data)
 430 {
 431         struct obd_device *obd = data;
 432         struct osc_device *od  = obd2osc_dev(obd);
 433
 434         return lprocfs_write_helper(buffer, count, &od->od_contention_time) ?:
 435                 count;
 436 }
 437
 438 static int osc_rd_lockless_truncate(char *page, char **start, off_t off,
 439                                     int count, int *eof, void *data)
 440 {
 441         struct obd_device *obd = data;
 442         struct osc_device *od  = obd2osc_dev(obd);
 443
 444         return snprintf(page, count, "%u\n", od->od_lockless_truncate);
 445 }
 446
 447 static int osc_wr_lockless_truncate(struct file *file, const char *buffer,
 448                                     unsigned long count, void *data)
 449 {
 450         struct obd_device *obd = data;
 451         struct osc_device *od  = obd2osc_dev(obd);
 452
 453         return lprocfs_write_helper(buffer, count, &od->od_lockless_truncate) ?:
 454                 count;
 455 }
 456
 457 static int osc_rd_destroys_in_flight(char *page, char **start, off_t off,
 458                                      int count, int *eof, void *data)
 459 {
 460         struct obd_device *obd = data;
 461         return snprintf(page, count, "%u\n",
 462                         cfs_atomic_read(&obd->u.cli.cl_destroy_in_flight));
 463 }
 464
 465 static int lprocfs_osc_wr_max_pages_per_rpc(struct file *file,
 466         const char *buffer, unsigned long count, void *data)
 467 {
 468         struct obd_device *dev = data;
 469         struct client_obd *cli = &dev->u.cli;
 470         struct obd_connect_data *ocd = &cli->cl_import->imp_connect_data;
 471         int chunk_mask, rc;
 472         __u64 val;
 473
 474         rc = lprocfs_write_u64_helper(buffer, count, &val);
 475         if (rc)
 476                 return rc;
 477
 478         /* if the max_pages is specified in bytes, convert to pages */
 479         if (val >= ONE_MB_BRW_SIZE)
 480                 val >>= CFS_PAGE_SHIFT;
 481
 482         LPROCFS_CLIMP_CHECK(dev);
 483
 484         chunk_mask = ~((1 << (cli->cl_chunkbits - CFS_PAGE_SHIFT)) - 1);
 485         /* max_pages_per_rpc must be chunk aligned */
 486         val = (val + ~chunk_mask) & chunk_mask;
 487         if (val == 0 || val > ocd->ocd_brw_size >> CFS_PAGE_SHIFT) {
 488                 LPROCFS_CLIMP_EXIT(dev);
 489                 return -ERANGE;
 490         }
 491         client_obd_list_lock(&cli->cl_loi_list_lock);
 492         cli->cl_max_pages_per_rpc = val;
 493         client_obd_list_unlock(&cli->cl_loi_list_lock);
 494
 495         LPROCFS_CLIMP_EXIT(dev);
 496         return count;
 497 }
 498
 499 static struct lprocfs_vars lprocfs_osc_obd_vars[] = {
 500         { "uuid",            lprocfs_rd_uuid,        0, 0 },
 501         { "ping",            0, lprocfs_wr_ping,     0, 0, 0222 },
 502         { "connect_flags",   lprocfs_rd_connect_flags, 0, 0 },
 503         { "blocksize",       lprocfs_rd_blksize,     0, 0 },
 504         { "kbytestotal",     lprocfs_rd_kbytestotal, 0, 0 },
 505         { "kbytesfree",      lprocfs_rd_kbytesfree,  0, 0 },
 506         { "kbytesavail",     lprocfs_rd_kbytesavail, 0, 0 },
 507         { "filestotal",      lprocfs_rd_filestotal,  0, 0 },
 508         { "filesfree",       lprocfs_rd_filesfree,   0, 0 },
 509         //{ "filegroups",      lprocfs_rd_filegroups,  0, 0 },
 510         { "ost_server_uuid", lprocfs_rd_server_uuid, 0, 0 },
 511         { "ost_conn_uuid",   lprocfs_rd_conn_uuid, 0, 0 },
 512         { "active",          osc_rd_active,
 513                              osc_wr_active, 0 },
 514         { "max_pages_per_rpc", lprocfs_obd_rd_max_pages_per_rpc,
 515                                lprocfs_osc_wr_max_pages_per_rpc, 0 },
 516         { "max_rpcs_in_flight", osc_rd_max_rpcs_in_flight,
 517                                 osc_wr_max_rpcs_in_flight, 0 },
 518         { "destroys_in_flight", osc_rd_destroys_in_flight, 0, 0 },
 519         { "max_dirty_mb",    osc_rd_max_dirty_mb, osc_wr_max_dirty_mb, 0 },
 520         { "osc_cached_mb",   osc_rd_cached_mb,     osc_wr_cached_mb, 0 },
 521         { "cur_dirty_bytes", osc_rd_cur_dirty_bytes, 0, 0 },
 522         { "cur_grant_bytes", osc_rd_cur_grant_bytes,
 523                              osc_wr_cur_grant_bytes, 0 },
 524         { "cur_lost_grant_bytes", osc_rd_cur_lost_grant_bytes, 0, 0},
 525         { "grant_shrink_interval", osc_rd_grant_shrink_interval,
 526                                    osc_wr_grant_shrink_interval, 0 },
 527         { "checksums",       osc_rd_checksum, osc_wr_checksum, 0 },
 528         { "checksum_type",   osc_rd_checksum_type, osc_wd_checksum_type, 0 },
 529         { "resend_count",    osc_rd_resend_count, osc_wr_resend_count, 0},
 530         { "timeouts",        lprocfs_rd_timeouts,      0, 0 },
 531         { "contention_seconds", osc_rd_contention_seconds,
 532                                 osc_wr_contention_seconds, 0 },
 533         { "lockless_truncate",  osc_rd_lockless_truncate,
 534                                 osc_wr_lockless_truncate, 0 },
 535         { "import",          lprocfs_rd_import,        lprocfs_wr_import, 0 },
 536         { "state",           lprocfs_rd_state,         0, 0 },
 537         { "pinger_recov",    lprocfs_rd_pinger_recov,
 538                              lprocfs_wr_pinger_recov,  0, 0 },
 539         { 0 }
 540 };
 541
 542 static struct lprocfs_vars lprocfs_osc_module_vars[] = {
 543         { "num_refs",        lprocfs_rd_numrefs,     0, 0 },
 544         { 0 }
 545 };
 546
 547 #define pct(a,b) (b ? a * 100 / b : 0)
 548
 549 static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 550 {
 551         struct timeval now;
 552         struct obd_device *dev = seq->private;
 553         struct client_obd *cli = &dev->u.cli;
 554         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 555         int i;
 556
 557         cfs_gettimeofday(&now);
 558
 559         client_obd_list_lock(&cli->cl_loi_list_lock);
 560
 561         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 562                    now.tv_sec, now.tv_usec);
 563         seq_printf(seq, "read RPCs in flight:  %d\n",
 564                    cli->cl_r_in_flight);
 565         seq_printf(seq, "write RPCs in flight: %d\n",
 566                    cli->cl_w_in_flight);
 567         seq_printf(seq, "pending write pages:  %d\n",
 568                    cfs_atomic_read(&cli->cl_pending_w_pages));
 569         seq_printf(seq, "pending read pages:   %d\n",
 570                    cfs_atomic_read(&cli->cl_pending_r_pages));
 571
 572         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 573         seq_printf(seq, "pages per rpc         rpcs   %% cum %% |");
 574         seq_printf(seq, "       rpcs   %% cum %%\n");
 575
 576         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 577         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 578
 579         read_cum = 0;
 580         write_cum = 0;
 581         for (i = 0; i < OBD_HIST_MAX; i++) {
 582                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 583                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 584                 read_cum += r;
 585                 write_cum += w;
 586                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 587                                  1 << i, r, pct(r, read_tot),
 588                                  pct(read_cum, read_tot), w,
 589                                  pct(w, write_tot),
 590                                  pct(write_cum, write_tot));
 591                 if (read_cum == read_tot && write_cum == write_tot)
 592                         break;
 593         }
 594
 595         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 596         seq_printf(seq, "rpcs in flight        rpcs   %% cum %% |");
 597         seq_printf(seq, "       rpcs   %% cum %%\n");
 598
 599         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 600         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
 601
 602         read_cum = 0;
 603         write_cum = 0;
 604         for (i = 0; i < OBD_HIST_MAX; i++) {
 605                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
 606                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
 607                 read_cum += r;
 608                 write_cum += w;
 609                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 610                                  i, r, pct(r, read_tot),
 611                                  pct(read_cum, read_tot), w,
 612                                  pct(w, write_tot),
 613                                  pct(write_cum, write_tot));
 614                 if (read_cum == read_tot && write_cum == write_tot)
 615                         break;
 616         }
 617
 618         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 619         seq_printf(seq, "offset                rpcs   %% cum %% |");
 620         seq_printf(seq, "       rpcs   %% cum %%\n");
 621
 622         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
 623         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist);
 624
 625         read_cum = 0;
 626         write_cum = 0;
 627         for (i = 0; i < OBD_HIST_MAX; i++) {
 628                 unsigned long r = cli->cl_read_offset_hist.oh_buckets[i];
 629                 unsigned long w = cli->cl_write_offset_hist.oh_buckets[i];
 630                 read_cum += r;
 631                 write_cum += w;
 632                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 633                            (i == 0) ? 0 : 1 << (i - 1),
 634                            r, pct(r, read_tot), pct(read_cum, read_tot),
 635                            w, pct(w, write_tot), pct(write_cum, write_tot));
 636                 if (read_cum == read_tot && write_cum == write_tot)
 637                         break;
 638         }
 639
 640         client_obd_list_unlock(&cli->cl_loi_list_lock);
 641
 642         return 0;
 643 }
 644 #undef pct
 645
 646 static ssize_t osc_rpc_stats_seq_write(struct file *file, const char *buf,
 647                                        size_t len, loff_t *off)
 648 {
 649         struct seq_file *seq = file->private_data;
 650         struct obd_device *dev = seq->private;
 651         struct client_obd *cli = &dev->u.cli;
 652
 653         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 654         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 655         lprocfs_oh_clear(&cli->cl_read_page_hist);
 656         lprocfs_oh_clear(&cli->cl_write_page_hist);
 657         lprocfs_oh_clear(&cli->cl_read_offset_hist);
 658         lprocfs_oh_clear(&cli->cl_write_offset_hist);
 659
 660         return len;
 661 }
 662
 663 LPROC_SEQ_FOPS(osc_rpc_stats);
 664
 665 static int osc_stats_seq_show(struct seq_file *seq, void *v)
 666 {
 667         struct timeval now;
 668         struct obd_device *dev = seq->private;
 669         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 670
 671         cfs_gettimeofday(&now);
 672
 673         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 674                    now.tv_sec, now.tv_usec);
 675         seq_printf(seq, "lockless_write_bytes\t\t"LPU64"\n",
 676                    stats->os_lockless_writes);
 677         seq_printf(seq, "lockless_read_bytes\t\t"LPU64"\n",
 678                    stats->os_lockless_reads);
 679         seq_printf(seq, "lockless_truncate\t\t"LPU64"\n",
 680                    stats->os_lockless_truncates);
 681         return 0;
 682 }
 683
 684 static ssize_t osc_stats_seq_write(struct file *file, const char *buf,
 685                                    size_t len, loff_t *off)
 686 {
 687         struct seq_file *seq = file->private_data;
 688         struct obd_device *dev = seq->private;
 689         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 690
 691         memset(stats, 0, sizeof(*stats));
 692         return len;
 693 }
 694
 695 LPROC_SEQ_FOPS(osc_stats);
 696
 697 int lproc_osc_attach_seqstat(struct obd_device *dev)
 698 {
 699         int rc;
 700
 701         rc = lprocfs_seq_create(dev->obd_proc_entry, "osc_stats", 0644,
 702                                 &osc_stats_fops, dev);
 703         if (rc == 0)
 704                 rc = lprocfs_obd_seq_create(dev, "rpc_stats", 0644,
 705                                             &osc_rpc_stats_fops, dev);
 706
 707         return rc;
 708 }
 709
 710 void lprocfs_osc_init_vars(struct lprocfs_static_vars *lvars)
 711 {
 712         lvars->module_vars = lprocfs_osc_module_vars;
 713         lvars->obd_vars    = lprocfs_osc_obd_vars;
 714 }
 715 #endif /* LPROCFS */