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, Whamcloud, Inc.
  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         LPROCFS_CLIMP_CHECK(dev);
  72         /* opposite senses */
  73         if (dev->u.cli.cl_import->imp_deactive == val)
  74                 rc = ptlrpc_set_import_active(dev->u.cli.cl_import, val);
  75         else
  76                 CDEBUG(D_CONFIG, "activate %d: ignoring repeat request\n", val);
  77
  78         LPROCFS_CLIMP_EXIT(dev);
  79         return count;
  80 }
  81
  82 static int osc_rd_max_rpcs_in_flight(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, "%u\n", cli->cl_max_rpcs_in_flight);
  91         client_obd_list_unlock(&cli->cl_loi_list_lock);
  92         return rc;
  93 }
  94
  95 static int osc_wr_max_rpcs_in_flight(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 ptlrpc_request_pool *pool = cli->cl_import->imp_rq_pool;
 101         int val, rc;
 102
 103         rc = lprocfs_write_helper(buffer, count, &val);
 104         if (rc)
 105                 return rc;
 106
 107         if (val < 1 || val > OSC_MAX_RIF_MAX)
 108                 return -ERANGE;
 109
 110         LPROCFS_CLIMP_CHECK(dev);
 111         if (pool && val > cli->cl_max_rpcs_in_flight)
 112                 pool->prp_populate(pool, val-cli->cl_max_rpcs_in_flight);
 113
 114         client_obd_list_lock(&cli->cl_loi_list_lock);
 115         cli->cl_max_rpcs_in_flight = val;
 116         client_obd_list_unlock(&cli->cl_loi_list_lock);
 117
 118         LPROCFS_CLIMP_EXIT(dev);
 119         return count;
 120 }
 121
 122 static int osc_rd_max_dirty_mb(char *page, char **start, off_t off, int count,
 123                                int *eof, void *data)
 124 {
 125         struct obd_device *dev = data;
 126         struct client_obd *cli = &dev->u.cli;
 127         long val;
 128         int mult;
 129
 130         client_obd_list_lock(&cli->cl_loi_list_lock);
 131         val = cli->cl_dirty_max;
 132         client_obd_list_unlock(&cli->cl_loi_list_lock);
 133
 134         mult = 1 << 20;
 135         return lprocfs_read_frac_helper(page, count, val, mult);
 136 }
 137
 138 static int osc_wr_max_dirty_mb(struct file *file, const char *buffer,
 139                                unsigned long count, void *data)
 140 {
 141         struct obd_device *dev = data;
 142         struct client_obd *cli = &dev->u.cli;
 143         int pages_number, mult, rc;
 144
 145         mult = 1 << (20 - CFS_PAGE_SHIFT);
 146         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 147         if (rc)
 148                 return rc;
 149
 150         if (pages_number < 0 ||
 151             pages_number > OSC_MAX_DIRTY_MB_MAX << (20 - CFS_PAGE_SHIFT) ||
 152             pages_number > cfs_num_physpages / 4) /* 1/4 of RAM */
 153                 return -ERANGE;
 154
 155         client_obd_list_lock(&cli->cl_loi_list_lock);
 156         cli->cl_dirty_max = (obd_count)(pages_number << CFS_PAGE_SHIFT);
 157         osc_wake_cache_waiters(cli);
 158         client_obd_list_unlock(&cli->cl_loi_list_lock);
 159
 160         return count;
 161 }
 162
 163 static int osc_rd_cached_mb(char *page, char **start, off_t off, int count,
 164                             int *eof, void *data)
 165 {
 166         struct obd_device *dev = data;
 167         struct client_obd *cli = &dev->u.cli;
 168         int shift = 20 - CFS_PAGE_SHIFT;
 169         int rc;
 170
 171         rc = snprintf(page, count,
 172                       "used_mb: %d\n"
 173                       "busy_cnt: %d\n",
 174                       (cfs_atomic_read(&cli->cl_lru_in_list) +
 175                         cfs_atomic_read(&cli->cl_lru_busy)) >> shift,
 176                       cfs_atomic_read(&cli->cl_lru_busy));
 177
 178         return rc;
 179 }
 180
 181 /* shrink the number of caching pages to a specific number */
 182 static int osc_wr_cached_mb(struct file *file, const char *buffer,
 183                             unsigned long count, void *data)
 184 {
 185         struct obd_device *dev = data;
 186         struct client_obd *cli = &dev->u.cli;
 187         int pages_number, mult, rc;
 188
 189         mult = 1 << (20 - CFS_PAGE_SHIFT);
 190         buffer = lprocfs_find_named_value(buffer, "used_mb:", &count);
 191         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 192         if (rc)
 193                 return rc;
 194
 195         if (pages_number < 0)
 196                 return -ERANGE;
 197
 198         rc = cfs_atomic_read(&cli->cl_lru_in_list) - pages_number;
 199         if (rc > 0)
 200                 (void)osc_lru_shrink(cli, rc);
 201
 202         return count;
 203 }
 204
 205 static int osc_rd_cur_dirty_bytes(char *page, char **start, off_t off,
 206                                   int count, int *eof, void *data)
 207 {
 208         struct obd_device *dev = data;
 209         struct client_obd *cli = &dev->u.cli;
 210         int rc;
 211
 212         client_obd_list_lock(&cli->cl_loi_list_lock);
 213         rc = snprintf(page, count, "%lu\n", cli->cl_dirty);
 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 (cfs_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, val, rc;
 474
 475         rc = lprocfs_write_helper(buffer, count, &val);
 476         if (rc)
 477                 return rc;
 478
 479         LPROCFS_CLIMP_CHECK(dev);
 480
 481         chunk_mask = ~((1 << (cli->cl_chunkbits - CFS_PAGE_SHIFT)) - 1);
 482         /* max_pages_per_rpc must be chunk aligned */
 483         val = (val + ~chunk_mask) & chunk_mask;
 484         if (val == 0 || val > ocd->ocd_brw_size >> CFS_PAGE_SHIFT) {
 485                 LPROCFS_CLIMP_EXIT(dev);
 486                 return -ERANGE;
 487         }
 488         client_obd_list_lock(&cli->cl_loi_list_lock);
 489         cli->cl_max_pages_per_rpc = val;
 490         client_obd_list_unlock(&cli->cl_loi_list_lock);
 491
 492         LPROCFS_CLIMP_EXIT(dev);
 493         return count;
 494 }
 495
 496 static struct lprocfs_vars lprocfs_osc_obd_vars[] = {
 497         { "uuid",            lprocfs_rd_uuid,        0, 0 },
 498         { "ping",            0, lprocfs_wr_ping,     0, 0, 0222 },
 499         { "connect_flags",   lprocfs_rd_connect_flags, 0, 0 },
 500         { "blocksize",       lprocfs_rd_blksize,     0, 0 },
 501         { "kbytestotal",     lprocfs_rd_kbytestotal, 0, 0 },
 502         { "kbytesfree",      lprocfs_rd_kbytesfree,  0, 0 },
 503         { "kbytesavail",     lprocfs_rd_kbytesavail, 0, 0 },
 504         { "filestotal",      lprocfs_rd_filestotal,  0, 0 },
 505         { "filesfree",       lprocfs_rd_filesfree,   0, 0 },
 506         //{ "filegroups",      lprocfs_rd_filegroups,  0, 0 },
 507         { "ost_server_uuid", lprocfs_rd_server_uuid, 0, 0 },
 508         { "ost_conn_uuid",   lprocfs_rd_conn_uuid, 0, 0 },
 509         { "active",          osc_rd_active,
 510                              osc_wr_active, 0 },
 511         { "max_pages_per_rpc", lprocfs_obd_rd_max_pages_per_rpc,
 512                                lprocfs_osc_wr_max_pages_per_rpc, 0 },
 513         { "max_rpcs_in_flight", osc_rd_max_rpcs_in_flight,
 514                                 osc_wr_max_rpcs_in_flight, 0 },
 515         { "destroys_in_flight", osc_rd_destroys_in_flight, 0, 0 },
 516         { "max_dirty_mb",    osc_rd_max_dirty_mb, osc_wr_max_dirty_mb, 0 },
 517         { "osc_cached_mb",   osc_rd_cached_mb,     osc_wr_cached_mb, 0 },
 518         { "cur_dirty_bytes", osc_rd_cur_dirty_bytes, 0, 0 },
 519         { "cur_grant_bytes", osc_rd_cur_grant_bytes,
 520                              osc_wr_cur_grant_bytes, 0 },
 521         { "cur_lost_grant_bytes", osc_rd_cur_lost_grant_bytes, 0, 0},
 522         { "grant_shrink_interval", osc_rd_grant_shrink_interval,
 523                                    osc_wr_grant_shrink_interval, 0 },
 524         { "checksums",       osc_rd_checksum, osc_wr_checksum, 0 },
 525         { "checksum_type",   osc_rd_checksum_type, osc_wd_checksum_type, 0 },
 526         { "resend_count",    osc_rd_resend_count, osc_wr_resend_count, 0},
 527         { "timeouts",        lprocfs_rd_timeouts,      0, 0 },
 528         { "contention_seconds", osc_rd_contention_seconds,
 529                                 osc_wr_contention_seconds, 0 },
 530         { "lockless_truncate",  osc_rd_lockless_truncate,
 531                                 osc_wr_lockless_truncate, 0 },
 532         { "import",          lprocfs_rd_import,        lprocfs_wr_import, 0 },
 533         { "state",           lprocfs_rd_state,         0, 0 },
 534         { "pinger_recov",    lprocfs_rd_pinger_recov,
 535                              lprocfs_wr_pinger_recov,  0, 0 },
 536         { 0 }
 537 };
 538
 539 static struct lprocfs_vars lprocfs_osc_module_vars[] = {
 540         { "num_refs",        lprocfs_rd_numrefs,     0, 0 },
 541         { 0 }
 542 };
 543
 544 #define pct(a,b) (b ? a * 100 / b : 0)
 545
 546 static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 547 {
 548         struct timeval now;
 549         struct obd_device *dev = seq->private;
 550         struct client_obd *cli = &dev->u.cli;
 551         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 552         int i;
 553
 554         cfs_gettimeofday(&now);
 555
 556         client_obd_list_lock(&cli->cl_loi_list_lock);
 557
 558         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 559                    now.tv_sec, now.tv_usec);
 560         seq_printf(seq, "read RPCs in flight:  %d\n",
 561                    cli->cl_r_in_flight);
 562         seq_printf(seq, "write RPCs in flight: %d\n",
 563                    cli->cl_w_in_flight);
 564         seq_printf(seq, "pending write pages:  %d\n",
 565                    cfs_atomic_read(&cli->cl_pending_w_pages));
 566         seq_printf(seq, "pending read pages:   %d\n",
 567                    cfs_atomic_read(&cli->cl_pending_r_pages));
 568
 569         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 570         seq_printf(seq, "pages per rpc         rpcs   %% cum %% |");
 571         seq_printf(seq, "       rpcs   %% cum %%\n");
 572
 573         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 574         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 575
 576         read_cum = 0;
 577         write_cum = 0;
 578         for (i = 0; i < OBD_HIST_MAX; i++) {
 579                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 580                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 581                 read_cum += r;
 582                 write_cum += w;
 583                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 584                                  1 << i, r, pct(r, read_tot),
 585                                  pct(read_cum, read_tot), w,
 586                                  pct(w, write_tot),
 587                                  pct(write_cum, write_tot));
 588                 if (read_cum == read_tot && write_cum == write_tot)
 589                         break;
 590         }
 591
 592         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 593         seq_printf(seq, "rpcs in flight        rpcs   %% cum %% |");
 594         seq_printf(seq, "       rpcs   %% cum %%\n");
 595
 596         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 597         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
 598
 599         read_cum = 0;
 600         write_cum = 0;
 601         for (i = 0; i < OBD_HIST_MAX; i++) {
 602                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
 603                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
 604                 read_cum += r;
 605                 write_cum += w;
 606                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 607                                  i, r, pct(r, read_tot),
 608                                  pct(read_cum, read_tot), w,
 609                                  pct(w, write_tot),
 610                                  pct(write_cum, write_tot));
 611                 if (read_cum == read_tot && write_cum == write_tot)
 612                         break;
 613         }
 614
 615         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 616         seq_printf(seq, "offset                rpcs   %% cum %% |");
 617         seq_printf(seq, "       rpcs   %% cum %%\n");
 618
 619         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
 620         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist);
 621
 622         read_cum = 0;
 623         write_cum = 0;
 624         for (i = 0; i < OBD_HIST_MAX; i++) {
 625                 unsigned long r = cli->cl_read_offset_hist.oh_buckets[i];
 626                 unsigned long w = cli->cl_write_offset_hist.oh_buckets[i];
 627                 read_cum += r;
 628                 write_cum += w;
 629                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 630                            (i == 0) ? 0 : 1 << (i - 1),
 631                            r, pct(r, read_tot), pct(read_cum, read_tot),
 632                            w, pct(w, write_tot), pct(write_cum, write_tot));
 633                 if (read_cum == read_tot && write_cum == write_tot)
 634                         break;
 635         }
 636
 637         client_obd_list_unlock(&cli->cl_loi_list_lock);
 638
 639         return 0;
 640 }
 641 #undef pct
 642
 643 static ssize_t osc_rpc_stats_seq_write(struct file *file, const char *buf,
 644                                        size_t len, loff_t *off)
 645 {
 646         struct seq_file *seq = file->private_data;
 647         struct obd_device *dev = seq->private;
 648         struct client_obd *cli = &dev->u.cli;
 649
 650         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 651         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 652         lprocfs_oh_clear(&cli->cl_read_page_hist);
 653         lprocfs_oh_clear(&cli->cl_write_page_hist);
 654         lprocfs_oh_clear(&cli->cl_read_offset_hist);
 655         lprocfs_oh_clear(&cli->cl_write_offset_hist);
 656
 657         return len;
 658 }
 659
 660 LPROC_SEQ_FOPS(osc_rpc_stats);
 661
 662 static int osc_stats_seq_show(struct seq_file *seq, void *v)
 663 {
 664         struct timeval now;
 665         struct obd_device *dev = seq->private;
 666         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 667
 668         cfs_gettimeofday(&now);
 669
 670         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 671                    now.tv_sec, now.tv_usec);
 672         seq_printf(seq, "lockless_write_bytes\t\t"LPU64"\n",
 673                    stats->os_lockless_writes);
 674         seq_printf(seq, "lockless_read_bytes\t\t"LPU64"\n",
 675                    stats->os_lockless_reads);
 676         seq_printf(seq, "lockless_truncate\t\t"LPU64"\n",
 677                    stats->os_lockless_truncates);
 678         return 0;
 679 }
 680
 681 static ssize_t osc_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 osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 687
 688         memset(stats, 0, sizeof(*stats));
 689         return len;
 690 }
 691
 692 LPROC_SEQ_FOPS(osc_stats);
 693
 694 int lproc_osc_attach_seqstat(struct obd_device *dev)
 695 {
 696         int rc;
 697
 698         rc = lprocfs_seq_create(dev->obd_proc_entry, "osc_stats", 0444,
 699                                 &osc_stats_fops, dev);
 700         if (rc == 0)
 701                 rc = lprocfs_obd_seq_create(dev, "rpc_stats", 0444,
 702                                             &osc_rpc_stats_fops, dev);
 703         return rc;
 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 */