drivers/staging/lustre/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_active_seq_show(struct seq_file *m, void *v)
  48 {
  49         struct obd_device *dev = m->private;
  50         int rc;
  51
  52         LPROCFS_CLIMP_CHECK(dev);
  53         rc = seq_printf(m, "%d\n", !dev->u.cli.cl_import->imp_deactive);
  54         LPROCFS_CLIMP_EXIT(dev);
  55         return rc;
  56 }
  57
  58 static ssize_t osc_active_seq_write(struct file *file, const char *buffer,
  59                                     size_t count, loff_t *off)
  60 {
  61         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
  62         int val, rc;
  63
  64         rc = lprocfs_write_helper(buffer, count, &val);
  65         if (rc)
  66                 return rc;
  67         if (val < 0 || val > 1)
  68                 return -ERANGE;
  69
  70         /* opposite senses */
  71         if (dev->u.cli.cl_import->imp_deactive == val)
  72                 rc = ptlrpc_set_import_active(dev->u.cli.cl_import, val);
  73         else
  74                 CDEBUG(D_CONFIG, "activate %d: ignoring repeat request\n", val);
  75
  76         return count;
  77 }
  78 LPROC_SEQ_FOPS(osc_active);
  79
  80 static int osc_max_rpcs_in_flight_seq_show(struct seq_file *m, void *v)
  81 {
  82         struct obd_device *dev = m->private;
  83         struct client_obd *cli = &dev->u.cli;
  84         int rc;
  85
  86         client_obd_list_lock(&cli->cl_loi_list_lock);
  87         rc = seq_printf(m, "%u\n", cli->cl_max_rpcs_in_flight);
  88         client_obd_list_unlock(&cli->cl_loi_list_lock);
  89         return rc;
  90 }
  91
  92 static ssize_t osc_max_rpcs_in_flight_seq_write(struct file *file,
  93                         const char *buffer, size_t count, loff_t *off)
  94 {
  95         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
  96         struct client_obd *cli = &dev->u.cli;
  97         struct ptlrpc_request_pool *pool = cli->cl_import->imp_rq_pool;
  98         int val, rc;
  99
 100         rc = lprocfs_write_helper(buffer, count, &val);
 101         if (rc)
 102                 return rc;
 103
 104         if (val < 1 || val > OSC_MAX_RIF_MAX)
 105                 return -ERANGE;
 106
 107         LPROCFS_CLIMP_CHECK(dev);
 108         if (pool && val > cli->cl_max_rpcs_in_flight)
 109                 pool->prp_populate(pool, val-cli->cl_max_rpcs_in_flight);
 110
 111         client_obd_list_lock(&cli->cl_loi_list_lock);
 112         cli->cl_max_rpcs_in_flight = val;
 113         client_obd_list_unlock(&cli->cl_loi_list_lock);
 114
 115         LPROCFS_CLIMP_EXIT(dev);
 116         return count;
 117 }
 118 LPROC_SEQ_FOPS(osc_max_rpcs_in_flight);
 119
 120 static int osc_max_dirty_mb_seq_show(struct seq_file *m, void *v)
 121 {
 122         struct obd_device *dev = m->private;
 123         struct client_obd *cli = &dev->u.cli;
 124         long val;
 125         int mult;
 126
 127         client_obd_list_lock(&cli->cl_loi_list_lock);
 128         val = cli->cl_dirty_max;
 129         client_obd_list_unlock(&cli->cl_loi_list_lock);
 130
 131         mult = 1 << 20;
 132         return lprocfs_seq_read_frac_helper(m, val, mult);
 133 }
 134
 135 static ssize_t osc_max_dirty_mb_seq_write(struct file *file, const char *buffer,
 136                                       size_t count, loff_t *off)
 137 {
 138         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
 139         struct client_obd *cli = &dev->u.cli;
 140         int pages_number, mult, rc;
 141
 142         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 143         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 144         if (rc)
 145                 return rc;
 146
 147         if (pages_number <= 0 ||
 148             pages_number > OSC_MAX_DIRTY_MB_MAX << (20 - PAGE_CACHE_SHIFT) ||
 149             pages_number > num_physpages / 4) /* 1/4 of RAM */
 150                 return -ERANGE;
 151
 152         client_obd_list_lock(&cli->cl_loi_list_lock);
 153         cli->cl_dirty_max = (obd_count)(pages_number << PAGE_CACHE_SHIFT);
 154         osc_wake_cache_waiters(cli);
 155         client_obd_list_unlock(&cli->cl_loi_list_lock);
 156
 157         return count;
 158 }
 159 LPROC_SEQ_FOPS(osc_max_dirty_mb);
 160
 161 static int osc_cached_mb_seq_show(struct seq_file *m, void *v)
 162 {
 163         struct obd_device *dev = m->private;
 164         struct client_obd *cli = &dev->u.cli;
 165         int shift = 20 - PAGE_CACHE_SHIFT;
 166         int rc;
 167
 168         rc = seq_printf(m,
 169                       "used_mb: %d\n"
 170                       "busy_cnt: %d\n",
 171                       (atomic_read(&cli->cl_lru_in_list) +
 172                         atomic_read(&cli->cl_lru_busy)) >> shift,
 173                       atomic_read(&cli->cl_lru_busy));
 174
 175         return rc;
 176 }
 177
 178 /* shrink the number of caching pages to a specific number */
 179 static ssize_t osc_cached_mb_seq_write(struct file *file, const char *buffer,
 180                                    size_t count, loff_t *off)
 181 {
 182         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
 183         struct client_obd *cli = &dev->u.cli;
 184         int pages_number, mult, rc;
 185
 186         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 187         buffer = lprocfs_find_named_value(buffer, "used_mb:", &count);
 188         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 189         if (rc)
 190                 return rc;
 191
 192         if (pages_number < 0)
 193                 return -ERANGE;
 194
 195         rc = atomic_read(&cli->cl_lru_in_list) - pages_number;
 196         if (rc > 0)
 197                 (void)osc_lru_shrink(cli, rc);
 198
 199         return count;
 200 }
 201 LPROC_SEQ_FOPS(osc_cached_mb);
 202
 203 static int osc_cur_dirty_bytes_seq_show(struct seq_file *m, void *v)
 204 {
 205         struct obd_device *dev = m->private;
 206         struct client_obd *cli = &dev->u.cli;
 207         int rc;
 208
 209         client_obd_list_lock(&cli->cl_loi_list_lock);
 210         rc = seq_printf(m, "%lu\n", cli->cl_dirty);
 211         client_obd_list_unlock(&cli->cl_loi_list_lock);
 212         return rc;
 213 }
 214 LPROC_SEQ_FOPS_RO(osc_cur_dirty_bytes);
 215
 216 static int osc_cur_grant_bytes_seq_show(struct seq_file *m, void *v)
 217 {
 218         struct obd_device *dev = m->private;
 219         struct client_obd *cli = &dev->u.cli;
 220         int rc;
 221
 222         client_obd_list_lock(&cli->cl_loi_list_lock);
 223         rc = seq_printf(m, "%lu\n", cli->cl_avail_grant);
 224         client_obd_list_unlock(&cli->cl_loi_list_lock);
 225         return rc;
 226 }
 227
 228 static ssize_t osc_cur_grant_bytes_seq_write(struct file *file, const char *buffer,
 229                                   size_t count, loff_t *off)
 230 {
 231         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 232         struct client_obd *cli = &obd->u.cli;
 233         int             rc;
 234         __u64         val;
 235
 236         if (obd == NULL)
 237                 return 0;
 238
 239         rc = lprocfs_write_u64_helper(buffer, count, &val);
 240         if (rc)
 241                 return rc;
 242
 243         /* this is only for shrinking grant */
 244         client_obd_list_lock(&cli->cl_loi_list_lock);
 245         if (val >= cli->cl_avail_grant) {
 246                 client_obd_list_unlock(&cli->cl_loi_list_lock);
 247                 return 0;
 248         }
 249         client_obd_list_unlock(&cli->cl_loi_list_lock);
 250
 251         LPROCFS_CLIMP_CHECK(obd);
 252         if (cli->cl_import->imp_state == LUSTRE_IMP_FULL)
 253                 rc = osc_shrink_grant_to_target(cli, val);
 254         LPROCFS_CLIMP_EXIT(obd);
 255         if (rc)
 256                 return rc;
 257         return count;
 258 }
 259 LPROC_SEQ_FOPS(osc_cur_grant_bytes);
 260
 261 static int osc_cur_lost_grant_bytes_seq_show(struct seq_file *m, void *v)
 262 {
 263         struct obd_device *dev = m->private;
 264         struct client_obd *cli = &dev->u.cli;
 265         int rc;
 266
 267         client_obd_list_lock(&cli->cl_loi_list_lock);
 268         rc = seq_printf(m, "%lu\n", cli->cl_lost_grant);
 269         client_obd_list_unlock(&cli->cl_loi_list_lock);
 270         return rc;
 271 }
 272 LPROC_SEQ_FOPS_RO(osc_cur_lost_grant_bytes);
 273
 274 static int osc_grant_shrink_interval_seq_show(struct seq_file *m, void *v)
 275 {
 276         struct obd_device *obd = m->private;
 277
 278         if (obd == NULL)
 279                 return 0;
 280         return seq_printf(m, "%d\n",
 281                         obd->u.cli.cl_grant_shrink_interval);
 282 }
 283
 284 static ssize_t osc_grant_shrink_interval_seq_write(struct file *file,
 285                                 const char *buffer, size_t count, loff_t *off)
 286 {
 287         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 288         int val, rc;
 289
 290         if (obd == NULL)
 291                 return 0;
 292
 293         rc = lprocfs_write_helper(buffer, count, &val);
 294         if (rc)
 295                 return rc;
 296
 297         if (val <= 0)
 298                 return -ERANGE;
 299
 300         obd->u.cli.cl_grant_shrink_interval = val;
 301
 302         return count;
 303 }
 304 LPROC_SEQ_FOPS(osc_grant_shrink_interval);
 305
 306 static int osc_checksum_seq_show(struct seq_file *m, void *v)
 307 {
 308         struct obd_device *obd = m->private;
 309
 310         if (obd == NULL)
 311                 return 0;
 312
 313         return seq_printf(m, "%d\n",
 314                         obd->u.cli.cl_checksum ? 1 : 0);
 315 }
 316
 317 static ssize_t osc_checksum_seq_write(struct file *file, const char *buffer,
 318                            size_t count, loff_t *off)
 319 {
 320         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 321         int val, rc;
 322
 323         if (obd == NULL)
 324                 return 0;
 325
 326         rc = lprocfs_write_helper(buffer, count, &val);
 327         if (rc)
 328                 return rc;
 329
 330         obd->u.cli.cl_checksum = (val ? 1 : 0);
 331
 332         return count;
 333 }
 334 LPROC_SEQ_FOPS(osc_checksum);
 335
 336 static int osc_checksum_type_seq_show(struct seq_file *m, void *v)
 337 {
 338         struct obd_device *obd = m->private;
 339         int i;
 340         DECLARE_CKSUM_NAME;
 341
 342         if (obd == NULL)
 343                 return 0;
 344
 345         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 346                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 347                         continue;
 348                 if (obd->u.cli.cl_cksum_type == (1 << i))
 349                         seq_printf(m, "[%s] ", cksum_name[i]);
 350                 else
 351                         seq_printf(m, "%s ", cksum_name[i]);
 352         }
 353         seq_printf(m, "\n");
 354         return 0;
 355 }
 356
 357 static ssize_t osc_checksum_type_seq_write(struct file *file, const char *buffer,
 358                                 size_t count, loff_t *off)
 359 {
 360         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 361         int i;
 362         DECLARE_CKSUM_NAME;
 363         char kernbuf[10];
 364
 365         if (obd == NULL)
 366                 return 0;
 367
 368         if (count > sizeof(kernbuf) - 1)
 369                 return -EINVAL;
 370         if (copy_from_user(kernbuf, buffer, count))
 371                 return -EFAULT;
 372         if (count > 0 && kernbuf[count - 1] == '\n')
 373                 kernbuf[count - 1] = '\0';
 374         else
 375                 kernbuf[count] = '\0';
 376
 377         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 378                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 379                         continue;
 380                 if (!strcmp(kernbuf, cksum_name[i])) {
 381                        obd->u.cli.cl_cksum_type = 1 << i;
 382                        return count;
 383                 }
 384         }
 385         return -EINVAL;
 386 }
 387 LPROC_SEQ_FOPS(osc_checksum_type);
 388
 389 static int osc_resend_count_seq_show(struct seq_file *m, void *v)
 390 {
 391         struct obd_device *obd = m->private;
 392
 393         return seq_printf(m, "%u\n", atomic_read(&obd->u.cli.cl_resends));
 394 }
 395
 396 static ssize_t osc_resend_count_seq_write(struct file *file, const char *buffer,
 397                                size_t count, loff_t *off)
 398 {
 399         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 400         int val, rc;
 401
 402         rc = lprocfs_write_helper(buffer, count, &val);
 403         if (rc)
 404                 return rc;
 405
 406         if (val < 0)
 407                return -EINVAL;
 408
 409         atomic_set(&obd->u.cli.cl_resends, val);
 410
 411         return count;
 412 }
 413 LPROC_SEQ_FOPS(osc_resend_count);
 414
 415 static int osc_contention_seconds_seq_show(struct seq_file *m, void *v)
 416 {
 417         struct obd_device *obd = m->private;
 418         struct osc_device *od  = obd2osc_dev(obd);
 419
 420         return seq_printf(m, "%u\n", od->od_contention_time);
 421 }
 422
 423 static ssize_t osc_contention_seconds_seq_write(struct file *file, const char *buffer,
 424                                      size_t count, loff_t *off)
 425 {
 426         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 427         struct osc_device *od  = obd2osc_dev(obd);
 428
 429         return lprocfs_write_helper(buffer, count, &od->od_contention_time) ?:
 430                 count;
 431 }
 432 LPROC_SEQ_FOPS(osc_contention_seconds);
 433
 434 static int osc_lockless_truncate_seq_show(struct seq_file *m, void *v)
 435 {
 436         struct obd_device *obd = m->private;
 437         struct osc_device *od  = obd2osc_dev(obd);
 438
 439         return seq_printf(m, "%u\n", od->od_lockless_truncate);
 440 }
 441
 442 static ssize_t osc_lockless_truncate_seq_write(struct file *file, const char *buffer,
 443                                     size_t count, loff_t *off)
 444 {
 445         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 446         struct osc_device *od  = obd2osc_dev(obd);
 447
 448         return lprocfs_write_helper(buffer, count, &od->od_lockless_truncate) ?:
 449                 count;
 450 }
 451 LPROC_SEQ_FOPS(osc_lockless_truncate);
 452
 453 static int osc_destroys_in_flight_seq_show(struct seq_file *m, void *v)
 454 {
 455         struct obd_device *obd = m->private;
 456         return seq_printf(m, "%u\n",
 457                         atomic_read(&obd->u.cli.cl_destroy_in_flight));
 458 }
 459 LPROC_SEQ_FOPS_RO(osc_destroys_in_flight);
 460
 461 static int osc_obd_max_pages_per_rpc_seq_show(struct seq_file *m, void *v)
 462 {
 463         return lprocfs_obd_rd_max_pages_per_rpc(m, m->private);
 464 }
 465
 466 static ssize_t osc_obd_max_pages_per_rpc_seq_write(struct file *file,
 467                                 const char *buffer, size_t count, loff_t *off)
 468 {
 469         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
 470         struct client_obd *cli = &dev->u.cli;
 471         struct obd_connect_data *ocd = &cli->cl_import->imp_connect_data;
 472         int chunk_mask, rc;
 473         __u64 val;
 474
 475         rc = lprocfs_write_u64_helper(buffer, count, &val);
 476         if (rc)
 477                 return rc;
 478
 479         /* if the max_pages is specified in bytes, convert to pages */
 480         if (val >= ONE_MB_BRW_SIZE)
 481                 val >>= PAGE_CACHE_SHIFT;
 482
 483         LPROCFS_CLIMP_CHECK(dev);
 484
 485         chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_CACHE_SHIFT)) - 1);
 486         /* max_pages_per_rpc must be chunk aligned */
 487         val = (val + ~chunk_mask) & chunk_mask;
 488         if (val == 0 || val > ocd->ocd_brw_size >> PAGE_CACHE_SHIFT) {
 489                 LPROCFS_CLIMP_EXIT(dev);
 490                 return -ERANGE;
 491         }
 492         client_obd_list_lock(&cli->cl_loi_list_lock);
 493         cli->cl_max_pages_per_rpc = val;
 494         client_obd_list_unlock(&cli->cl_loi_list_lock);
 495
 496         LPROCFS_CLIMP_EXIT(dev);
 497         return count;
 498 }
 499 LPROC_SEQ_FOPS(osc_obd_max_pages_per_rpc);
 500
 501 LPROC_SEQ_FOPS_RO_TYPE(osc, uuid);
 502 LPROC_SEQ_FOPS_RO_TYPE(osc, connect_flags);
 503 LPROC_SEQ_FOPS_RO_TYPE(osc, blksize);
 504 LPROC_SEQ_FOPS_RO_TYPE(osc, kbytestotal);
 505 LPROC_SEQ_FOPS_RO_TYPE(osc, kbytesfree);
 506 LPROC_SEQ_FOPS_RO_TYPE(osc, kbytesavail);
 507 LPROC_SEQ_FOPS_RO_TYPE(osc, filestotal);
 508 LPROC_SEQ_FOPS_RO_TYPE(osc, filesfree);
 509 LPROC_SEQ_FOPS_RO_TYPE(osc, server_uuid);
 510 LPROC_SEQ_FOPS_RO_TYPE(osc, conn_uuid);
 511 LPROC_SEQ_FOPS_RO_TYPE(osc, timeouts);
 512 LPROC_SEQ_FOPS_RO_TYPE(osc, state);
 513
 514 LPROC_SEQ_FOPS_WR_ONLY(osc, ping);
 515
 516 LPROC_SEQ_FOPS_RW_TYPE(osc, import);
 517 LPROC_SEQ_FOPS_RW_TYPE(osc, pinger_recov);
 518
 519 static struct lprocfs_vars lprocfs_osc_obd_vars[] = {
 520         { "uuid",            &osc_uuid_fops,    0, 0 },
 521         { "ping",            &osc_ping_fops,    0, 0222 },
 522         { "connect_flags",   &osc_connect_flags_fops, 0, 0 },
 523         { "blocksize",       &osc_blksize_fops,     0, 0 },
 524         { "kbytestotal",     &osc_kbytestotal_fops, 0, 0 },
 525         { "kbytesfree",      &osc_kbytesfree_fops,  0, 0 },
 526         { "kbytesavail",     &osc_kbytesavail_fops, 0, 0 },
 527         { "filestotal",      &osc_filestotal_fops,  0, 0 },
 528         { "filesfree",       &osc_filesfree_fops,   0, 0 },
 529         //{ "filegroups",      lprocfs_rd_filegroups,  0, 0 },
 530         { "ost_server_uuid", &osc_server_uuid_fops, 0, 0 },
 531         { "ost_conn_uuid",   &osc_conn_uuid_fops, 0, 0 },
 532         { "active",          &osc_active_fops, 0 },
 533         { "max_pages_per_rpc", &osc_obd_max_pages_per_rpc_fops, 0 },
 534         { "max_rpcs_in_flight", &osc_max_rpcs_in_flight_fops, 0 },
 535         { "destroys_in_flight", &osc_destroys_in_flight_fops, 0, 0 },
 536         { "max_dirty_mb",    &osc_max_dirty_mb_fops, 0 },
 537         { "osc_cached_mb",   &osc_cached_mb_fops, 0 },
 538         { "cur_dirty_bytes", &osc_cur_dirty_bytes_fops, 0, 0 },
 539         { "cur_grant_bytes", &osc_cur_grant_bytes_fops, 0 },
 540         { "cur_lost_grant_bytes", &osc_cur_lost_grant_bytes_fops, 0, 0},
 541         { "grant_shrink_interval", &osc_grant_shrink_interval_fops, 0 },
 542         { "checksums",       &osc_checksum_fops, 0 },
 543         { "checksum_type",   &osc_checksum_type_fops, 0 },
 544         { "resend_count",    &osc_resend_count_fops, 0},
 545         { "timeouts",        &osc_timeouts_fops, 0, 0 },
 546         { "contention_seconds", &osc_contention_seconds_fops, 0 },
 547         { "lockless_truncate",  &osc_lockless_truncate_fops, 0 },
 548         { "import",             &osc_import_fops, 0 },
 549         { "state",              &osc_state_fops, 0, 0 },
 550         { "pinger_recov",       &osc_pinger_recov_fops, 0 },
 551         { 0 }
 552 };
 553
 554 LPROC_SEQ_FOPS_RO_TYPE(osc, numrefs);
 555 static struct lprocfs_vars lprocfs_osc_module_vars[] = {
 556         { "num_refs",   &osc_numrefs_fops,     0, 0 },
 557         { 0 }
 558 };
 559
 560 #define pct(a,b) (b ? a * 100 / b : 0)
 561
 562 static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 563 {
 564         struct timeval now;
 565         struct obd_device *dev = seq->private;
 566         struct client_obd *cli = &dev->u.cli;
 567         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 568         int i;
 569
 570         do_gettimeofday(&now);
 571
 572         client_obd_list_lock(&cli->cl_loi_list_lock);
 573
 574         seq_printf(seq, "snapshot_time:  %lu.%lu (secs.usecs)\n",
 575                    now.tv_sec, now.tv_usec);
 576         seq_printf(seq, "read RPCs in flight:  %d\n",
 577                    cli->cl_r_in_flight);
 578         seq_printf(seq, "write RPCs in flight: %d\n",
 579                    cli->cl_w_in_flight);
 580         seq_printf(seq, "pending write pages:  %d\n",
 581                    atomic_read(&cli->cl_pending_w_pages));
 582         seq_printf(seq, "pending read pages:   %d\n",
 583                    atomic_read(&cli->cl_pending_r_pages));
 584
 585         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 586         seq_printf(seq, "pages per rpc   rpcs   %% cum %% |");
 587         seq_printf(seq, "       rpcs   %% cum %%\n");
 588
 589         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 590         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 591
 592         read_cum = 0;
 593         write_cum = 0;
 594         for (i = 0; i < OBD_HIST_MAX; i++) {
 595                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 596                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 597                 read_cum += r;
 598                 write_cum += w;
 599                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 600                                  1 << i, r, pct(r, read_tot),
 601                                  pct(read_cum, read_tot), w,
 602                                  pct(w, write_tot),
 603                                  pct(write_cum, write_tot));
 604                 if (read_cum == read_tot && write_cum == write_tot)
 605                         break;
 606         }
 607
 608         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 609         seq_printf(seq, "rpcs in flight rpcs   %% cum %% |");
 610         seq_printf(seq, "       rpcs   %% cum %%\n");
 611
 612         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 613         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
 614
 615         read_cum = 0;
 616         write_cum = 0;
 617         for (i = 0; i < OBD_HIST_MAX; i++) {
 618                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
 619                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
 620                 read_cum += r;
 621                 write_cum += w;
 622                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 623                                  i, r, pct(r, read_tot),
 624                                  pct(read_cum, read_tot), w,
 625                                  pct(w, write_tot),
 626                                  pct(write_cum, write_tot));
 627                 if (read_cum == read_tot && write_cum == write_tot)
 628                         break;
 629         }
 630
 631         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 632         seq_printf(seq, "offset         rpcs   %% cum %% |");
 633         seq_printf(seq, "       rpcs   %% cum %%\n");
 634
 635         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
 636         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist);
 637
 638         read_cum = 0;
 639         write_cum = 0;
 640         for (i = 0; i < OBD_HIST_MAX; i++) {
 641                 unsigned long r = cli->cl_read_offset_hist.oh_buckets[i];
 642                 unsigned long w = cli->cl_write_offset_hist.oh_buckets[i];
 643                 read_cum += r;
 644                 write_cum += w;
 645                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 646                            (i == 0) ? 0 : 1 << (i - 1),
 647                            r, pct(r, read_tot), pct(read_cum, read_tot),
 648                            w, pct(w, write_tot), pct(write_cum, write_tot));
 649                 if (read_cum == read_tot && write_cum == write_tot)
 650                         break;
 651         }
 652
 653         client_obd_list_unlock(&cli->cl_loi_list_lock);
 654
 655         return 0;
 656 }
 657 #undef pct
 658
 659 static ssize_t osc_rpc_stats_seq_write(struct file *file, const char *buf,
 660                                        size_t len, loff_t *off)
 661 {
 662         struct seq_file *seq = file->private_data;
 663         struct obd_device *dev = seq->private;
 664         struct client_obd *cli = &dev->u.cli;
 665
 666         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 667         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 668         lprocfs_oh_clear(&cli->cl_read_page_hist);
 669         lprocfs_oh_clear(&cli->cl_write_page_hist);
 670         lprocfs_oh_clear(&cli->cl_read_offset_hist);
 671         lprocfs_oh_clear(&cli->cl_write_offset_hist);
 672
 673         return len;
 674 }
 675
 676 LPROC_SEQ_FOPS(osc_rpc_stats);
 677
 678 static int osc_stats_seq_show(struct seq_file *seq, void *v)
 679 {
 680         struct timeval now;
 681         struct obd_device *dev = seq->private;
 682         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 683
 684         do_gettimeofday(&now);
 685
 686         seq_printf(seq, "snapshot_time:  %lu.%lu (secs.usecs)\n",
 687                    now.tv_sec, now.tv_usec);
 688         seq_printf(seq, "lockless_write_bytes\t\t"LPU64"\n",
 689                    stats->os_lockless_writes);
 690         seq_printf(seq, "lockless_read_bytes\t\t"LPU64"\n",
 691                    stats->os_lockless_reads);
 692         seq_printf(seq, "lockless_truncate\t\t"LPU64"\n",
 693                    stats->os_lockless_truncates);
 694         return 0;
 695 }
 696
 697 static ssize_t osc_stats_seq_write(struct file *file, const char *buf,
 698                                    size_t len, loff_t *off)
 699 {
 700         struct seq_file *seq = file->private_data;
 701         struct obd_device *dev = seq->private;
 702         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 703
 704         memset(stats, 0, sizeof(*stats));
 705         return len;
 706 }
 707
 708 LPROC_SEQ_FOPS(osc_stats);
 709
 710 int lproc_osc_attach_seqstat(struct obd_device *dev)
 711 {
 712         int rc;
 713
 714         rc = lprocfs_seq_create(dev->obd_proc_entry, "osc_stats", 0644,
 715                                 &osc_stats_fops, dev);
 716         if (rc == 0)
 717                 rc = lprocfs_obd_seq_create(dev, "rpc_stats", 0644,
 718                                             &osc_rpc_stats_fops, dev);
 719
 720         return rc;
 721 }
 722
 723 void lprocfs_osc_init_vars(struct lprocfs_static_vars *lvars)
 724 {
 725         lvars->module_vars = lprocfs_osc_module_vars;
 726         lvars->obd_vars    = lprocfs_osc_obd_vars;
 727 }
 728 #endif /* LPROCFS */