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_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_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 = &cli->cl_import->imp_connect_data;
 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         if (val < 1 || val > ocd->ocd_brw_size >> CFS_PAGE_SHIFT) {
 109                 LPROCFS_CLIMP_EXIT(dev);
 110                 return -ERANGE;
 111         }
 112         client_obd_list_lock(&cli->cl_loi_list_lock);
 113         cli->cl_max_pages_per_rpc = 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_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 = cli->cl_import->imp_rq_pool;
 139         int val, rc;
 140
 141         rc = lprocfs_write_helper(buffer, count, &val);
 142         if (rc)
 143                 return rc;
 144
 145         if (val < 1 || val > OSC_MAX_RIF_MAX)
 146                 return -ERANGE;
 147
 148         LPROCFS_CLIMP_CHECK(dev);
 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 ||
 189             pages_number > OSC_MAX_DIRTY_MB_MAX << (20 - CFS_PAGE_SHIFT) ||
 190             pages_number > num_physpages / 4) /* 1/4 of RAM */
 191                 return -ERANGE;
 192
 193         client_obd_list_lock(&cli->cl_loi_list_lock);
 194         cli->cl_dirty_max = (obd_count)(pages_number << CFS_PAGE_SHIFT);
 195         osc_wake_cache_waiters(cli);
 196         client_obd_list_unlock(&cli->cl_loi_list_lock);
 197
 198         return count;
 199 }
 200
 201 static int osc_rd_cur_dirty_bytes(char *page, char **start, off_t off,
 202                                   int count, int *eof, void *data)
 203 {
 204         struct obd_device *dev = data;
 205         struct client_obd *cli = &dev->u.cli;
 206         int rc;
 207
 208         client_obd_list_lock(&cli->cl_loi_list_lock);
 209         rc = snprintf(page, count, "%lu\n", cli->cl_dirty);
 210         client_obd_list_unlock(&cli->cl_loi_list_lock);
 211         return rc;
 212 }
 213
 214 static int osc_rd_cur_grant_bytes(char *page, char **start, off_t off,
 215                                   int count, int *eof, void *data)
 216 {
 217         struct obd_device *dev = data;
 218         struct client_obd *cli = &dev->u.cli;
 219         int rc;
 220
 221         client_obd_list_lock(&cli->cl_loi_list_lock);
 222         rc = snprintf(page, count, "%lu\n", cli->cl_avail_grant);
 223         client_obd_list_unlock(&cli->cl_loi_list_lock);
 224         return rc;
 225 }
 226
 227 static int osc_rd_create_count(char *page, char **start, off_t off, int count,
 228                                int *eof, void *data)
 229 {
 230         struct obd_device *obd = data;
 231
 232         if (obd == NULL)
 233                 return 0;
 234
 235         return snprintf(page, count, "%d\n",
 236                         obd->u.cli.cl_oscc.oscc_grow_count);
 237 }
 238
 239 /**
 240  * Set OSC creator's osc_creator::oscc_grow_count
 241  *
 242  * \param file   proc file
 243  * \param buffer buffer containing the value
 244  * \param count  buffer size
 245  * \param data   obd device
 246  *
 247  * \retval \a count
 248  */
 249 static int osc_wr_create_count(struct file *file, const char *buffer,
 250                                unsigned long count, void *data)
 251 {
 252         struct obd_device *obd = data;
 253         int val, rc, i;
 254
 255         if (obd == NULL)
 256                 return 0;
 257
 258         rc = lprocfs_write_helper(buffer, count, &val);
 259         if (rc)
 260                 return rc;
 261
 262         /* The MDT ALWAYS needs to limit the precreate count to
 263          * OST_MAX_PRECREATE, and the constant cannot be changed
 264          * because it is a value shared between the OSC and OST
 265          * that is the maximum possible number of objects that will
 266          * ever be handled by MDT->OST recovery processing.
 267          *
 268          * If the OST ever gets a request to delete more orphans,
 269          * this implies that something has gone badly on the MDT
 270          * and the OST will refuse to delete so much data from the
 271          * filesystem as a safety measure. */
 272         if (val < OST_MIN_PRECREATE || val > OST_MAX_PRECREATE)
 273                 return -ERANGE;
 274         if (val > obd->u.cli.cl_oscc.oscc_max_grow_count)
 275                 return -ERANGE;
 276
 277         for (i = 1; (i << 1) <= val; i <<= 1)
 278                 ;
 279         obd->u.cli.cl_oscc.oscc_grow_count = i;
 280
 281         return count;
 282 }
 283
 284 /**
 285  * Read OSC creator's osc_creator::oscc_max_grow_count
 286  *
 287  * \param page       buffer to hold the returning string
 288  * \param start
 289  * \param off
 290  * \param count
 291  * \param eof
 292  *              proc read function parameters, please refer to kernel
 293  *              code fs/proc/generic.c proc_file_read()
 294  * \param data   obd device
 295  *
 296  * \retval number of characters printed.
 297  */
 298 static int osc_rd_max_create_count(char *page, char **start, off_t off,
 299                                    int count, int *eof, void *data)
 300 {
 301         struct obd_device *obd = data;
 302
 303         if (obd == NULL)
 304                 return 0;
 305
 306         return snprintf(page, count, "%d\n",
 307                         obd->u.cli.cl_oscc.oscc_max_grow_count);
 308 }
 309
 310 /**
 311  * Set OSC creator's osc_creator::oscc_max_grow_count
 312  *
 313  * \param file   proc file
 314  * \param buffer buffer containing the value
 315  * \param count  buffer size
 316  * \param data   obd device
 317  *
 318  * \retval \a count
 319  */
 320 static int osc_wr_max_create_count(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         if (val < 0)
 334                 return -ERANGE;
 335         if (val > OST_MAX_PRECREATE)
 336                 return -ERANGE;
 337
 338         if (obd->u.cli.cl_oscc.oscc_grow_count > val)
 339                 obd->u.cli.cl_oscc.oscc_grow_count = val;
 340
 341         obd->u.cli.cl_oscc.oscc_max_grow_count = val;
 342
 343         return count;
 344 }
 345
 346 static int osc_rd_prealloc_next_id(char *page, char **start, off_t off,
 347                                    int count, int *eof, void *data)
 348 {
 349         struct obd_device *obd = data;
 350
 351         if (obd == NULL)
 352                 return 0;
 353
 354         return snprintf(page, count, LPU64"\n",
 355                         obd->u.cli.cl_oscc.oscc_next_id);
 356 }
 357
 358 static int osc_rd_prealloc_last_id(char *page, char **start, off_t off,
 359                                    int count, int *eof, void *data)
 360 {
 361         struct obd_device *obd = data;
 362
 363         if (obd == NULL)
 364                 return 0;
 365
 366         return snprintf(page, count, LPU64"\n",
 367                         obd->u.cli.cl_oscc.oscc_last_id);
 368 }
 369
 370 static int osc_rd_checksum(char *page, char **start, off_t off, int count,
 371                            int *eof, void *data)
 372 {
 373         struct obd_device *obd = data;
 374
 375         if (obd == NULL)
 376                 return 0;
 377
 378         return snprintf(page, count, "%d\n",
 379                         obd->u.cli.cl_checksum ? 1 : 0);
 380 }
 381
 382 static int osc_wr_checksum(struct file *file, const char *buffer,
 383                            unsigned long count, void *data)
 384 {
 385         struct obd_device *obd = data;
 386         int val, rc;
 387
 388         if (obd == NULL)
 389                 return 0;
 390
 391         rc = lprocfs_write_helper(buffer, count, &val);
 392         if (rc)
 393                 return rc;
 394
 395         obd->u.cli.cl_checksum = (val ? 1 : 0);
 396
 397         return count;
 398 }
 399
 400 static int osc_rd_checksum_type(char *page, char **start, off_t off, int count,
 401                                 int *eof, void *data)
 402 {
 403         struct obd_device *obd = data;
 404         int i, len =0;
 405         DECLARE_CKSUM_NAME;
 406
 407         if (obd == NULL)
 408                 return 0;
 409
 410         for (i = 0; i < ARRAY_SIZE(cksum_name) && len < count; i++) {
 411                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 412                         continue;
 413                 if (obd->u.cli.cl_cksum_type == (1 << i))
 414                         len += snprintf(page + len, count - len, "[%s] ",
 415                                         cksum_name[i]);
 416                 else
 417                         len += snprintf(page + len, count - len, "%s ",
 418                                         cksum_name[i]);
 419         }
 420         if (len < count)
 421                 len += sprintf(page + len, "\n");
 422         return len;
 423 }
 424
 425 static int osc_wd_checksum_type(struct file *file, const char *buffer,
 426                                 unsigned long count, void *data)
 427 {
 428         struct obd_device *obd = data;
 429         int i;
 430         DECLARE_CKSUM_NAME;
 431         char kernbuf[10];
 432
 433         if (obd == NULL)
 434                 return 0;
 435
 436         if (count > sizeof(kernbuf) - 1)
 437                 return -EINVAL;
 438         if (copy_from_user(kernbuf, buffer, count))
 439                 return -EFAULT;
 440         if (count > 0 && kernbuf[count - 1] == '\n')
 441                 kernbuf[count - 1] = '\0';
 442         else
 443                 kernbuf[count] = '\0';
 444
 445         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 446                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 447                         continue;
 448                 if (!strcmp(kernbuf, cksum_name[i])) {
 449                        obd->u.cli.cl_cksum_type = 1 << i;
 450                        return count;
 451                 }
 452         }
 453         return -EINVAL;
 454 }
 455
 456 static int osc_rd_resend_count(char *page, char **start, off_t off, int count,
 457                                int *eof, void *data)
 458 {
 459         struct obd_device *obd = data;
 460
 461         return snprintf(page, count, "%u\n", atomic_read(&obd->u.cli.cl_resends));
 462 }
 463
 464 static int osc_wr_resend_count(struct file *file, const char *buffer,
 465                                unsigned long count, void *data)
 466 {
 467         struct obd_device *obd = data;
 468         int val, rc;
 469
 470         rc = lprocfs_write_helper(buffer, count, &val);
 471         if (rc)
 472                 return rc;
 473
 474         if (val < 0)
 475                return -EINVAL;
 476
 477         atomic_set(&obd->u.cli.cl_resends, val);
 478
 479         return count;
 480 }
 481
 482 static struct lprocfs_vars lprocfs_osc_obd_vars[] = {
 483         { "uuid",            lprocfs_rd_uuid,        0, 0 },
 484         { "ping",            0, lprocfs_wr_ping,        0 },
 485         { "connect_flags",   lprocfs_rd_connect_flags, 0, 0 },
 486         { "blocksize",       lprocfs_rd_blksize,     0, 0 },
 487         { "kbytestotal",     lprocfs_rd_kbytestotal, 0, 0 },
 488         { "kbytesfree",      lprocfs_rd_kbytesfree,  0, 0 },
 489         { "kbytesavail",     lprocfs_rd_kbytesavail, 0, 0 },
 490         { "filestotal",      lprocfs_rd_filestotal,  0, 0 },
 491         { "filesfree",       lprocfs_rd_filesfree,   0, 0 },
 492         //{ "filegroups",      lprocfs_rd_filegroups,  0, 0 },
 493         { "ost_server_uuid", lprocfs_rd_server_uuid, 0, 0 },
 494         { "ost_conn_uuid",   lprocfs_rd_conn_uuid, 0, 0 },
 495         { "active",          osc_rd_active,
 496                              osc_wr_active, 0 },
 497         { "max_pages_per_rpc", osc_rd_max_pages_per_rpc,
 498                                osc_wr_max_pages_per_rpc, 0 },
 499         { "max_rpcs_in_flight", osc_rd_max_rpcs_in_flight,
 500                                 osc_wr_max_rpcs_in_flight, 0 },
 501         { "max_dirty_mb",    osc_rd_max_dirty_mb, osc_wr_max_dirty_mb, 0 },
 502         { "cur_dirty_bytes", osc_rd_cur_dirty_bytes, 0, 0 },
 503         { "cur_grant_bytes", osc_rd_cur_grant_bytes, 0, 0 },
 504         { "create_count",    osc_rd_create_count, osc_wr_create_count, 0 },
 505         { "max_create_count", osc_rd_max_create_count,
 506                               osc_wr_max_create_count, 0},
 507         { "prealloc_next_id", osc_rd_prealloc_next_id, 0, 0 },
 508         { "prealloc_last_id", osc_rd_prealloc_last_id, 0, 0 },
 509         { "checksums",       osc_rd_checksum, osc_wr_checksum, 0 },
 510         { "checksum_type",   osc_rd_checksum_type, osc_wd_checksum_type, 0 },
 511         { "resend_count",    osc_rd_resend_count, osc_wr_resend_count, 0},
 512         { "timeouts",        lprocfs_rd_timeouts,      0, 0 },
 513         { 0 }
 514 };
 515
 516 static struct lprocfs_vars lprocfs_osc_module_vars[] = {
 517         { "num_refs",        lprocfs_rd_numrefs,     0, 0 },
 518         { 0 }
 519 };
 520
 521 #define pct(a,b) (b ? a * 100 / b : 0)
 522
 523 static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 524 {
 525         struct timeval now;
 526         struct obd_device *dev = seq->private;
 527         struct client_obd *cli = &dev->u.cli;
 528         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 529         int i;
 530
 531         do_gettimeofday(&now);
 532
 533         client_obd_list_lock(&cli->cl_loi_list_lock);
 534
 535         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 536                    now.tv_sec, now.tv_usec);
 537         seq_printf(seq, "read RPCs in flight:  %d\n",
 538                    cli->cl_r_in_flight);
 539         seq_printf(seq, "write RPCs in flight: %d\n",
 540                    cli->cl_w_in_flight);
 541         seq_printf(seq, "pending write pages:  %d\n",
 542                    cli->cl_pending_w_pages);
 543         seq_printf(seq, "pending read pages:   %d\n",
 544                    cli->cl_pending_r_pages);
 545
 546         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 547         seq_printf(seq, "pages per rpc         rpcs   %% cum %% |");
 548         seq_printf(seq, "       rpcs   %% cum %%\n");
 549
 550         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 551         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 552
 553         read_cum = 0;
 554         write_cum = 0;
 555         for (i = 0; i < OBD_HIST_MAX; i++) {
 556                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 557                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 558                 read_cum += r;
 559                 write_cum += w;
 560                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 561                                  1 << i, r, pct(r, read_tot),
 562                                  pct(read_cum, read_tot), w,
 563                                  pct(w, write_tot),
 564                                  pct(write_cum, write_tot));
 565                 if (read_cum == read_tot && write_cum == write_tot)
 566                         break;
 567         }
 568
 569         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 570         seq_printf(seq, "rpcs in flight        rpcs   %% cum %% |");
 571         seq_printf(seq, "       rpcs   %% cum %%\n");
 572
 573         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 574         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_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_rpc_hist.oh_buckets[i];
 580                 unsigned long w = cli->cl_write_rpc_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                                  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, "offset                rpcs   %% cum %% |");
 594         seq_printf(seq, "       rpcs   %% cum %%\n");
 595
 596         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
 597         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_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_offset_hist.oh_buckets[i];
 603                 unsigned long w = cli->cl_write_offset_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 == 0) ? 0 : 1 << (i - 1),
 608                            r, pct(r, read_tot), pct(read_cum, read_tot),
 609                            w, pct(w, write_tot), pct(write_cum, write_tot));
 610                 if (read_cum == read_tot && write_cum == write_tot)
 611                         break;
 612         }
 613
 614         client_obd_list_unlock(&cli->cl_loi_list_lock);
 615
 616         return 0;
 617 }
 618 #undef pct
 619
 620 static ssize_t osc_rpc_stats_seq_write(struct file *file, const char *buf,
 621                                        size_t len, loff_t *off)
 622 {
 623         struct seq_file *seq = file->private_data;
 624         struct obd_device *dev = seq->private;
 625         struct client_obd *cli = &dev->u.cli;
 626
 627         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 628         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 629         lprocfs_oh_clear(&cli->cl_read_page_hist);
 630         lprocfs_oh_clear(&cli->cl_write_page_hist);
 631         lprocfs_oh_clear(&cli->cl_read_offset_hist);
 632         lprocfs_oh_clear(&cli->cl_write_offset_hist);
 633
 634         return len;
 635 }
 636
 637 LPROC_SEQ_FOPS(osc_rpc_stats);
 638
 639 int lproc_osc_attach_seqstat(struct obd_device *dev)
 640 {
 641         return lprocfs_obd_seq_create(dev, "rpc_stats", 0444,
 642                                       &osc_rpc_stats_fops, dev);
 643 }
 644
 645 void lprocfs_osc_init_vars(struct lprocfs_static_vars *lvars)
 646 {
 647         lvars->module_vars = lprocfs_osc_module_vars;
 648         lvars->obd_vars    = lprocfs_osc_obd_vars;
 649 }
 650 #endif /* LPROCFS */