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 <asm/statfs.h>
  39 #include <obd_cksum.h>
  40 #include <obd_class.h>
  41 #include <lprocfs_status.h>
  42 #include <linux/seq_file.h>
  43 #include "osc_internal.h"
  44
  45 #ifdef LPROCFS
  46 static int osc_active_seq_show(struct seq_file *m, void *v)
  47 {
  48         struct obd_device *dev = m->private;
  49         int rc;
  50
  51         LPROCFS_CLIMP_CHECK(dev);
  52         rc = seq_printf(m, "%d\n", !dev->u.cli.cl_import->imp_deactive);
  53         LPROCFS_CLIMP_EXIT(dev);
  54         return rc;
  55 }
  56
  57 static ssize_t osc_active_seq_write(struct file *file, const char *buffer,
  58                                     size_t count, loff_t *off)
  59 {
  60         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
  61         int val, rc;
  62
  63         rc = lprocfs_write_helper(buffer, count, &val);
  64         if (rc)
  65                 return rc;
  66         if (val < 0 || val > 1)
  67                 return -ERANGE;
  68
  69         /* opposite senses */
  70         if (dev->u.cli.cl_import->imp_deactive == val)
  71                 rc = ptlrpc_set_import_active(dev->u.cli.cl_import, val);
  72         else
  73                 CDEBUG(D_CONFIG, "activate %d: ignoring repeat request\n", val);
  74
  75         return count;
  76 }
  77 LPROC_SEQ_FOPS(osc_active);
  78
  79 static int osc_max_rpcs_in_flight_seq_show(struct seq_file *m, void *v)
  80 {
  81         struct obd_device *dev = m->private;
  82         struct client_obd *cli = &dev->u.cli;
  83         int rc;
  84
  85         client_obd_list_lock(&cli->cl_loi_list_lock);
  86         rc = seq_printf(m, "%u\n", cli->cl_max_rpcs_in_flight);
  87         client_obd_list_unlock(&cli->cl_loi_list_lock);
  88         return rc;
  89 }
  90
  91 static ssize_t osc_max_rpcs_in_flight_seq_write(struct file *file,
  92                         const char *buffer, size_t count, loff_t *off)
  93 {
  94         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
  95         struct client_obd *cli = &dev->u.cli;
  96         struct ptlrpc_request_pool *pool = cli->cl_import->imp_rq_pool;
  97         int val, rc;
  98
  99         rc = lprocfs_write_helper(buffer, count, &val);
 100         if (rc)
 101                 return rc;
 102
 103         if (val < 1 || val > OSC_MAX_RIF_MAX)
 104                 return -ERANGE;
 105
 106         LPROCFS_CLIMP_CHECK(dev);
 107         if (pool && val > cli->cl_max_rpcs_in_flight)
 108                 pool->prp_populate(pool, val-cli->cl_max_rpcs_in_flight);
 109
 110         client_obd_list_lock(&cli->cl_loi_list_lock);
 111         cli->cl_max_rpcs_in_flight = val;
 112         client_obd_list_unlock(&cli->cl_loi_list_lock);
 113
 114         LPROCFS_CLIMP_EXIT(dev);
 115         return count;
 116 }
 117 LPROC_SEQ_FOPS(osc_max_rpcs_in_flight);
 118
 119 static int osc_max_dirty_mb_seq_show(struct seq_file *m, void *v)
 120 {
 121         struct obd_device *dev = m->private;
 122         struct client_obd *cli = &dev->u.cli;
 123         long val;
 124         int mult;
 125
 126         client_obd_list_lock(&cli->cl_loi_list_lock);
 127         val = cli->cl_dirty_max;
 128         client_obd_list_unlock(&cli->cl_loi_list_lock);
 129
 130         mult = 1 << 20;
 131         return lprocfs_seq_read_frac_helper(m, val, mult);
 132 }
 133
 134 static ssize_t osc_max_dirty_mb_seq_write(struct file *file, const char *buffer,
 135                                       size_t count, loff_t *off)
 136 {
 137         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
 138         struct client_obd *cli = &dev->u.cli;
 139         int pages_number, mult, rc;
 140
 141         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 142         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 143         if (rc)
 144                 return rc;
 145
 146         if (pages_number <= 0 ||
 147             pages_number > OSC_MAX_DIRTY_MB_MAX << (20 - PAGE_CACHE_SHIFT) ||
 148             pages_number > totalram_pages / 4) /* 1/4 of RAM */
 149                 return -ERANGE;
 150
 151         client_obd_list_lock(&cli->cl_loi_list_lock);
 152         cli->cl_dirty_max = (obd_count)(pages_number << PAGE_CACHE_SHIFT);
 153         osc_wake_cache_waiters(cli);
 154         client_obd_list_unlock(&cli->cl_loi_list_lock);
 155
 156         return count;
 157 }
 158 LPROC_SEQ_FOPS(osc_max_dirty_mb);
 159
 160 static int osc_cached_mb_seq_show(struct seq_file *m, void *v)
 161 {
 162         struct obd_device *dev = m->private;
 163         struct client_obd *cli = &dev->u.cli;
 164         int shift = 20 - PAGE_CACHE_SHIFT;
 165         int rc;
 166
 167         rc = seq_printf(m,
 168                       "used_mb: %d\n"
 169                       "busy_cnt: %d\n",
 170                       (atomic_read(&cli->cl_lru_in_list) +
 171                         atomic_read(&cli->cl_lru_busy)) >> shift,
 172                       atomic_read(&cli->cl_lru_busy));
 173
 174         return rc;
 175 }
 176
 177 /* shrink the number of caching pages to a specific number */
 178 static ssize_t osc_cached_mb_seq_write(struct file *file, const char *buffer,
 179                                    size_t count, loff_t *off)
 180 {
 181         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
 182         struct client_obd *cli = &dev->u.cli;
 183         int pages_number, mult, rc;
 184
 185         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 186         buffer = lprocfs_find_named_value(buffer, "used_mb:", &count);
 187         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 188         if (rc)
 189                 return rc;
 190
 191         if (pages_number < 0)
 192                 return -ERANGE;
 193
 194         rc = atomic_read(&cli->cl_lru_in_list) - pages_number;
 195         if (rc > 0)
 196                 (void)osc_lru_shrink(cli, rc);
 197
 198         return count;
 199 }
 200 LPROC_SEQ_FOPS(osc_cached_mb);
 201
 202 static int osc_cur_dirty_bytes_seq_show(struct seq_file *m, void *v)
 203 {
 204         struct obd_device *dev = m->private;
 205         struct client_obd *cli = &dev->u.cli;
 206         int rc;
 207
 208         client_obd_list_lock(&cli->cl_loi_list_lock);
 209         rc = seq_printf(m, "%lu\n", cli->cl_dirty);
 210         client_obd_list_unlock(&cli->cl_loi_list_lock);
 211         return rc;
 212 }
 213 LPROC_SEQ_FOPS_RO(osc_cur_dirty_bytes);
 214
 215 static int osc_cur_grant_bytes_seq_show(struct seq_file *m, void *v)
 216 {
 217         struct obd_device *dev = m->private;
 218         struct client_obd *cli = &dev->u.cli;
 219         int rc;
 220
 221         client_obd_list_lock(&cli->cl_loi_list_lock);
 222         rc = seq_printf(m, "%lu\n", cli->cl_avail_grant);
 223         client_obd_list_unlock(&cli->cl_loi_list_lock);
 224         return rc;
 225 }
 226
 227 static ssize_t osc_cur_grant_bytes_seq_write(struct file *file, const char *buffer,
 228                                   size_t count, loff_t *off)
 229 {
 230         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 231         struct client_obd *cli = &obd->u.cli;
 232         int             rc;
 233         __u64         val;
 234
 235         if (obd == NULL)
 236                 return 0;
 237
 238         rc = lprocfs_write_u64_helper(buffer, count, &val);
 239         if (rc)
 240                 return rc;
 241
 242         /* this is only for shrinking grant */
 243         client_obd_list_lock(&cli->cl_loi_list_lock);
 244         if (val >= cli->cl_avail_grant) {
 245                 client_obd_list_unlock(&cli->cl_loi_list_lock);
 246                 return 0;
 247         }
 248         client_obd_list_unlock(&cli->cl_loi_list_lock);
 249
 250         LPROCFS_CLIMP_CHECK(obd);
 251         if (cli->cl_import->imp_state == LUSTRE_IMP_FULL)
 252                 rc = osc_shrink_grant_to_target(cli, val);
 253         LPROCFS_CLIMP_EXIT(obd);
 254         if (rc)
 255                 return rc;
 256         return count;
 257 }
 258 LPROC_SEQ_FOPS(osc_cur_grant_bytes);
 259
 260 static int osc_cur_lost_grant_bytes_seq_show(struct seq_file *m, void *v)
 261 {
 262         struct obd_device *dev = m->private;
 263         struct client_obd *cli = &dev->u.cli;
 264         int rc;
 265
 266         client_obd_list_lock(&cli->cl_loi_list_lock);
 267         rc = seq_printf(m, "%lu\n", cli->cl_lost_grant);
 268         client_obd_list_unlock(&cli->cl_loi_list_lock);
 269         return rc;
 270 }
 271 LPROC_SEQ_FOPS_RO(osc_cur_lost_grant_bytes);
 272
 273 static int osc_grant_shrink_interval_seq_show(struct seq_file *m, void *v)
 274 {
 275         struct obd_device *obd = m->private;
 276
 277         if (obd == NULL)
 278                 return 0;
 279         return seq_printf(m, "%d\n",
 280                         obd->u.cli.cl_grant_shrink_interval);
 281 }
 282
 283 static ssize_t osc_grant_shrink_interval_seq_write(struct file *file,
 284                                 const char *buffer, size_t count, loff_t *off)
 285 {
 286         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 287         int val, rc;
 288
 289         if (obd == NULL)
 290                 return 0;
 291
 292         rc = lprocfs_write_helper(buffer, count, &val);
 293         if (rc)
 294                 return rc;
 295
 296         if (val <= 0)
 297                 return -ERANGE;
 298
 299         obd->u.cli.cl_grant_shrink_interval = val;
 300
 301         return count;
 302 }
 303 LPROC_SEQ_FOPS(osc_grant_shrink_interval);
 304
 305 static int osc_checksum_seq_show(struct seq_file *m, void *v)
 306 {
 307         struct obd_device *obd = m->private;
 308
 309         if (obd == NULL)
 310                 return 0;
 311
 312         return seq_printf(m, "%d\n",
 313                         obd->u.cli.cl_checksum ? 1 : 0);
 314 }
 315
 316 static ssize_t osc_checksum_seq_write(struct file *file, const char *buffer,
 317                            size_t count, loff_t *off)
 318 {
 319         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 320         int val, rc;
 321
 322         if (obd == NULL)
 323                 return 0;
 324
 325         rc = lprocfs_write_helper(buffer, count, &val);
 326         if (rc)
 327                 return rc;
 328
 329         obd->u.cli.cl_checksum = (val ? 1 : 0);
 330
 331         return count;
 332 }
 333 LPROC_SEQ_FOPS(osc_checksum);
 334
 335 static int osc_checksum_type_seq_show(struct seq_file *m, void *v)
 336 {
 337         struct obd_device *obd = m->private;
 338         int i;
 339         DECLARE_CKSUM_NAME;
 340
 341         if (obd == NULL)
 342                 return 0;
 343
 344         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 345                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 346                         continue;
 347                 if (obd->u.cli.cl_cksum_type == (1 << i))
 348                         seq_printf(m, "[%s] ", cksum_name[i]);
 349                 else
 350                         seq_printf(m, "%s ", cksum_name[i]);
 351         }
 352         seq_printf(m, "\n");
 353         return 0;
 354 }
 355
 356 static ssize_t osc_checksum_type_seq_write(struct file *file, const char *buffer,
 357                                 size_t count, loff_t *off)
 358 {
 359         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 360         int i;
 361         DECLARE_CKSUM_NAME;
 362         char kernbuf[10];
 363
 364         if (obd == NULL)
 365                 return 0;
 366
 367         if (count > sizeof(kernbuf) - 1)
 368                 return -EINVAL;
 369         if (copy_from_user(kernbuf, buffer, count))
 370                 return -EFAULT;
 371         if (count > 0 && kernbuf[count - 1] == '\n')
 372                 kernbuf[count - 1] = '\0';
 373         else
 374                 kernbuf[count] = '\0';
 375
 376         for (i = 0; i < ARRAY_SIZE(cksum_name); i++) {
 377                 if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0)
 378                         continue;
 379                 if (!strcmp(kernbuf, cksum_name[i])) {
 380                        obd->u.cli.cl_cksum_type = 1 << i;
 381                        return count;
 382                 }
 383         }
 384         return -EINVAL;
 385 }
 386 LPROC_SEQ_FOPS(osc_checksum_type);
 387
 388 static int osc_resend_count_seq_show(struct seq_file *m, void *v)
 389 {
 390         struct obd_device *obd = m->private;
 391
 392         return seq_printf(m, "%u\n", atomic_read(&obd->u.cli.cl_resends));
 393 }
 394
 395 static ssize_t osc_resend_count_seq_write(struct file *file, const char *buffer,
 396                                size_t count, loff_t *off)
 397 {
 398         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 399         int val, rc;
 400
 401         rc = lprocfs_write_helper(buffer, count, &val);
 402         if (rc)
 403                 return rc;
 404
 405         if (val < 0)
 406                return -EINVAL;
 407
 408         atomic_set(&obd->u.cli.cl_resends, val);
 409
 410         return count;
 411 }
 412 LPROC_SEQ_FOPS(osc_resend_count);
 413
 414 static int osc_contention_seconds_seq_show(struct seq_file *m, void *v)
 415 {
 416         struct obd_device *obd = m->private;
 417         struct osc_device *od  = obd2osc_dev(obd);
 418
 419         return seq_printf(m, "%u\n", od->od_contention_time);
 420 }
 421
 422 static ssize_t osc_contention_seconds_seq_write(struct file *file, const char *buffer,
 423                                      size_t count, loff_t *off)
 424 {
 425         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 426         struct osc_device *od  = obd2osc_dev(obd);
 427
 428         return lprocfs_write_helper(buffer, count, &od->od_contention_time) ?:
 429                 count;
 430 }
 431 LPROC_SEQ_FOPS(osc_contention_seconds);
 432
 433 static int osc_lockless_truncate_seq_show(struct seq_file *m, void *v)
 434 {
 435         struct obd_device *obd = m->private;
 436         struct osc_device *od  = obd2osc_dev(obd);
 437
 438         return seq_printf(m, "%u\n", od->od_lockless_truncate);
 439 }
 440
 441 static ssize_t osc_lockless_truncate_seq_write(struct file *file, const char *buffer,
 442                                     size_t count, loff_t *off)
 443 {
 444         struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
 445         struct osc_device *od  = obd2osc_dev(obd);
 446
 447         return lprocfs_write_helper(buffer, count, &od->od_lockless_truncate) ?:
 448                 count;
 449 }
 450 LPROC_SEQ_FOPS(osc_lockless_truncate);
 451
 452 static int osc_destroys_in_flight_seq_show(struct seq_file *m, void *v)
 453 {
 454         struct obd_device *obd = m->private;
 455         return seq_printf(m, "%u\n",
 456                         atomic_read(&obd->u.cli.cl_destroy_in_flight));
 457 }
 458 LPROC_SEQ_FOPS_RO(osc_destroys_in_flight);
 459
 460 static int osc_obd_max_pages_per_rpc_seq_show(struct seq_file *m, void *v)
 461 {
 462         return lprocfs_obd_rd_max_pages_per_rpc(m, m->private);
 463 }
 464
 465 static ssize_t osc_obd_max_pages_per_rpc_seq_write(struct file *file,
 466                                 const char *buffer, size_t count, loff_t *off)
 467 {
 468         struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
 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 >>= PAGE_CACHE_SHIFT;
 481
 482         LPROCFS_CLIMP_CHECK(dev);
 483
 484         chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_CACHE_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 >> PAGE_CACHE_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 LPROC_SEQ_FOPS(osc_obd_max_pages_per_rpc);
 499
 500 LPROC_SEQ_FOPS_RO_TYPE(osc, uuid);
 501 LPROC_SEQ_FOPS_RO_TYPE(osc, connect_flags);
 502 LPROC_SEQ_FOPS_RO_TYPE(osc, blksize);
 503 LPROC_SEQ_FOPS_RO_TYPE(osc, kbytestotal);
 504 LPROC_SEQ_FOPS_RO_TYPE(osc, kbytesfree);
 505 LPROC_SEQ_FOPS_RO_TYPE(osc, kbytesavail);
 506 LPROC_SEQ_FOPS_RO_TYPE(osc, filestotal);
 507 LPROC_SEQ_FOPS_RO_TYPE(osc, filesfree);
 508 LPROC_SEQ_FOPS_RO_TYPE(osc, server_uuid);
 509 LPROC_SEQ_FOPS_RO_TYPE(osc, conn_uuid);
 510 LPROC_SEQ_FOPS_RO_TYPE(osc, timeouts);
 511 LPROC_SEQ_FOPS_RO_TYPE(osc, state);
 512
 513 LPROC_SEQ_FOPS_WR_ONLY(osc, ping);
 514
 515 LPROC_SEQ_FOPS_RW_TYPE(osc, import);
 516 LPROC_SEQ_FOPS_RW_TYPE(osc, pinger_recov);
 517
 518 static struct lprocfs_vars lprocfs_osc_obd_vars[] = {
 519         { "uuid",            &osc_uuid_fops,    0, 0 },
 520         { "ping",            &osc_ping_fops,    0, 0222 },
 521         { "connect_flags",   &osc_connect_flags_fops, 0, 0 },
 522         { "blocksize",       &osc_blksize_fops,     0, 0 },
 523         { "kbytestotal",     &osc_kbytestotal_fops, 0, 0 },
 524         { "kbytesfree",      &osc_kbytesfree_fops,  0, 0 },
 525         { "kbytesavail",     &osc_kbytesavail_fops, 0, 0 },
 526         { "filestotal",      &osc_filestotal_fops,  0, 0 },
 527         { "filesfree",       &osc_filesfree_fops,   0, 0 },
 528         //{ "filegroups",      lprocfs_rd_filegroups,  0, 0 },
 529         { "ost_server_uuid", &osc_server_uuid_fops, 0, 0 },
 530         { "ost_conn_uuid",   &osc_conn_uuid_fops, 0, 0 },
 531         { "active",          &osc_active_fops, 0 },
 532         { "max_pages_per_rpc", &osc_obd_max_pages_per_rpc_fops, 0 },
 533         { "max_rpcs_in_flight", &osc_max_rpcs_in_flight_fops, 0 },
 534         { "destroys_in_flight", &osc_destroys_in_flight_fops, 0, 0 },
 535         { "max_dirty_mb",    &osc_max_dirty_mb_fops, 0 },
 536         { "osc_cached_mb",   &osc_cached_mb_fops, 0 },
 537         { "cur_dirty_bytes", &osc_cur_dirty_bytes_fops, 0, 0 },
 538         { "cur_grant_bytes", &osc_cur_grant_bytes_fops, 0 },
 539         { "cur_lost_grant_bytes", &osc_cur_lost_grant_bytes_fops, 0, 0},
 540         { "grant_shrink_interval", &osc_grant_shrink_interval_fops, 0 },
 541         { "checksums",       &osc_checksum_fops, 0 },
 542         { "checksum_type",   &osc_checksum_type_fops, 0 },
 543         { "resend_count",    &osc_resend_count_fops, 0},
 544         { "timeouts",        &osc_timeouts_fops, 0, 0 },
 545         { "contention_seconds", &osc_contention_seconds_fops, 0 },
 546         { "lockless_truncate",  &osc_lockless_truncate_fops, 0 },
 547         { "import",             &osc_import_fops, 0 },
 548         { "state",              &osc_state_fops, 0, 0 },
 549         { "pinger_recov",       &osc_pinger_recov_fops, 0 },
 550         { 0 }
 551 };
 552
 553 LPROC_SEQ_FOPS_RO_TYPE(osc, numrefs);
 554 static struct lprocfs_vars lprocfs_osc_module_vars[] = {
 555         { "num_refs",   &osc_numrefs_fops,     0, 0 },
 556         { 0 }
 557 };
 558
 559 #define pct(a,b) (b ? a * 100 / b : 0)
 560
 561 static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
 562 {
 563         struct timeval now;
 564         struct obd_device *dev = seq->private;
 565         struct client_obd *cli = &dev->u.cli;
 566         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 567         int i;
 568
 569         do_gettimeofday(&now);
 570
 571         client_obd_list_lock(&cli->cl_loi_list_lock);
 572
 573         seq_printf(seq, "snapshot_time:  %lu.%lu (secs.usecs)\n",
 574                    now.tv_sec, now.tv_usec);
 575         seq_printf(seq, "read RPCs in flight:  %d\n",
 576                    cli->cl_r_in_flight);
 577         seq_printf(seq, "write RPCs in flight: %d\n",
 578                    cli->cl_w_in_flight);
 579         seq_printf(seq, "pending write pages:  %d\n",
 580                    atomic_read(&cli->cl_pending_w_pages));
 581         seq_printf(seq, "pending read pages:   %d\n",
 582                    atomic_read(&cli->cl_pending_r_pages));
 583
 584         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 585         seq_printf(seq, "pages per rpc   rpcs   %% cum %% |");
 586         seq_printf(seq, "       rpcs   %% cum %%\n");
 587
 588         read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist);
 589         write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist);
 590
 591         read_cum = 0;
 592         write_cum = 0;
 593         for (i = 0; i < OBD_HIST_MAX; i++) {
 594                 unsigned long r = cli->cl_read_page_hist.oh_buckets[i];
 595                 unsigned long w = cli->cl_write_page_hist.oh_buckets[i];
 596                 read_cum += r;
 597                 write_cum += w;
 598                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 599                                  1 << i, r, pct(r, read_tot),
 600                                  pct(read_cum, read_tot), w,
 601                                  pct(w, write_tot),
 602                                  pct(write_cum, write_tot));
 603                 if (read_cum == read_tot && write_cum == write_tot)
 604                         break;
 605         }
 606
 607         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 608         seq_printf(seq, "rpcs in flight rpcs   %% cum %% |");
 609         seq_printf(seq, "       rpcs   %% cum %%\n");
 610
 611         read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist);
 612         write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist);
 613
 614         read_cum = 0;
 615         write_cum = 0;
 616         for (i = 0; i < OBD_HIST_MAX; i++) {
 617                 unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i];
 618                 unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i];
 619                 read_cum += r;
 620                 write_cum += w;
 621                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 622                                  i, r, pct(r, read_tot),
 623                                  pct(read_cum, read_tot), w,
 624                                  pct(w, write_tot),
 625                                  pct(write_cum, write_tot));
 626                 if (read_cum == read_tot && write_cum == write_tot)
 627                         break;
 628         }
 629
 630         seq_printf(seq, "\n\t\t\tread\t\t\twrite\n");
 631         seq_printf(seq, "offset         rpcs   %% cum %% |");
 632         seq_printf(seq, "       rpcs   %% cum %%\n");
 633
 634         read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist);
 635         write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist);
 636
 637         read_cum = 0;
 638         write_cum = 0;
 639         for (i = 0; i < OBD_HIST_MAX; i++) {
 640                 unsigned long r = cli->cl_read_offset_hist.oh_buckets[i];
 641                 unsigned long w = cli->cl_write_offset_hist.oh_buckets[i];
 642                 read_cum += r;
 643                 write_cum += w;
 644                 seq_printf(seq, "%d:\t\t%10lu %3lu %3lu   | %10lu %3lu %3lu\n",
 645                            (i == 0) ? 0 : 1 << (i - 1),
 646                            r, pct(r, read_tot), pct(read_cum, read_tot),
 647                            w, pct(w, write_tot), pct(write_cum, write_tot));
 648                 if (read_cum == read_tot && write_cum == write_tot)
 649                         break;
 650         }
 651
 652         client_obd_list_unlock(&cli->cl_loi_list_lock);
 653
 654         return 0;
 655 }
 656 #undef pct
 657
 658 static ssize_t osc_rpc_stats_seq_write(struct file *file, const char *buf,
 659                                        size_t len, loff_t *off)
 660 {
 661         struct seq_file *seq = file->private_data;
 662         struct obd_device *dev = seq->private;
 663         struct client_obd *cli = &dev->u.cli;
 664
 665         lprocfs_oh_clear(&cli->cl_read_rpc_hist);
 666         lprocfs_oh_clear(&cli->cl_write_rpc_hist);
 667         lprocfs_oh_clear(&cli->cl_read_page_hist);
 668         lprocfs_oh_clear(&cli->cl_write_page_hist);
 669         lprocfs_oh_clear(&cli->cl_read_offset_hist);
 670         lprocfs_oh_clear(&cli->cl_write_offset_hist);
 671
 672         return len;
 673 }
 674
 675 LPROC_SEQ_FOPS(osc_rpc_stats);
 676
 677 static int osc_stats_seq_show(struct seq_file *seq, void *v)
 678 {
 679         struct timeval now;
 680         struct obd_device *dev = seq->private;
 681         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 682
 683         do_gettimeofday(&now);
 684
 685         seq_printf(seq, "snapshot_time:  %lu.%lu (secs.usecs)\n",
 686                    now.tv_sec, now.tv_usec);
 687         seq_printf(seq, "lockless_write_bytes\t\t"LPU64"\n",
 688                    stats->os_lockless_writes);
 689         seq_printf(seq, "lockless_read_bytes\t\t"LPU64"\n",
 690                    stats->os_lockless_reads);
 691         seq_printf(seq, "lockless_truncate\t\t"LPU64"\n",
 692                    stats->os_lockless_truncates);
 693         return 0;
 694 }
 695
 696 static ssize_t osc_stats_seq_write(struct file *file, const char *buf,
 697                                    size_t len, loff_t *off)
 698 {
 699         struct seq_file *seq = file->private_data;
 700         struct obd_device *dev = seq->private;
 701         struct osc_stats *stats = &obd2osc_dev(dev)->od_stats;
 702
 703         memset(stats, 0, sizeof(*stats));
 704         return len;
 705 }
 706
 707 LPROC_SEQ_FOPS(osc_stats);
 708
 709 int lproc_osc_attach_seqstat(struct obd_device *dev)
 710 {
 711         int rc;
 712
 713         rc = lprocfs_seq_create(dev->obd_proc_entry, "osc_stats", 0644,
 714                                 &osc_stats_fops, dev);
 715         if (rc == 0)
 716                 rc = lprocfs_obd_seq_create(dev, "rpc_stats", 0644,
 717                                             &osc_rpc_stats_fops, dev);
 718
 719         return rc;
 720 }
 721
 722 void lprocfs_osc_init_vars(struct lprocfs_static_vars *lvars)
 723 {
 724         lvars->module_vars = lprocfs_osc_module_vars;
 725         lvars->obd_vars    = lprocfs_osc_obd_vars;
 726 }
 727 #endif /* LPROCFS */