lustre/llite/lproc_llite.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_LLITE
  37
  38 #include <linux/version.h>
  39 #include <lustre_lite.h>
  40 #include <lprocfs_status.h>
  41 #include <linux/seq_file.h>
  42 #include <obd_support.h>
  43
  44 #include "llite_internal.h"
  45
  46 struct proc_dir_entry *proc_lustre_fs_root;
  47
  48 #ifdef LPROCFS
  49 /* /proc/lustre/llite mount point registration */
  50 extern struct file_operations vvp_dump_pgcache_file_ops;
  51 struct file_operations ll_rw_extents_stats_fops;
  52 struct file_operations ll_rw_extents_stats_pp_fops;
  53 struct file_operations ll_rw_offset_stats_fops;
  54
  55 static int ll_rd_blksize(char *page, char **start, off_t off, int count,
  56                          int *eof, void *data)
  57 {
  58         struct super_block *sb = (struct super_block *)data;
  59         struct obd_statfs osfs;
  60         int rc;
  61
  62         LASSERT(sb != NULL);
  63         rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - CFS_HZ,
  64                                 OBD_STATFS_NODELAY);
  65         if (!rc) {
  66               *eof = 1;
  67               rc = snprintf(page, count, "%u\n", osfs.os_bsize);
  68         }
  69
  70         return rc;
  71 }
  72
  73 static int ll_rd_kbytestotal(char *page, char **start, off_t off, int count,
  74                              int *eof, void *data)
  75 {
  76         struct super_block *sb = (struct super_block *)data;
  77         struct obd_statfs osfs;
  78         int rc;
  79
  80         LASSERT(sb != NULL);
  81         rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - CFS_HZ,
  82                                 OBD_STATFS_NODELAY);
  83         if (!rc) {
  84                 __u32 blk_size = osfs.os_bsize >> 10;
  85                 __u64 result = osfs.os_blocks;
  86
  87                 while (blk_size >>= 1)
  88                         result <<= 1;
  89
  90                 *eof = 1;
  91                 rc = snprintf(page, count, LPU64"\n", result);
  92         }
  93         return rc;
  94
  95 }
  96
  97 static int ll_rd_kbytesfree(char *page, char **start, off_t off, int count,
  98                             int *eof, void *data)
  99 {
 100         struct super_block *sb = (struct super_block *)data;
 101         struct obd_statfs osfs;
 102         int rc;
 103
 104         LASSERT(sb != NULL);
 105         rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - CFS_HZ,
 106                                 OBD_STATFS_NODELAY);
 107         if (!rc) {
 108                 __u32 blk_size = osfs.os_bsize >> 10;
 109                 __u64 result = osfs.os_bfree;
 110
 111                 while (blk_size >>= 1)
 112                         result <<= 1;
 113
 114                 *eof = 1;
 115                 rc = snprintf(page, count, LPU64"\n", result);
 116         }
 117         return rc;
 118 }
 119
 120 static int ll_rd_kbytesavail(char *page, char **start, off_t off, int count,
 121                              int *eof, void *data)
 122 {
 123         struct super_block *sb = (struct super_block *)data;
 124         struct obd_statfs osfs;
 125         int rc;
 126
 127         LASSERT(sb != NULL);
 128         rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - CFS_HZ,
 129                                 OBD_STATFS_NODELAY);
 130         if (!rc) {
 131                 __u32 blk_size = osfs.os_bsize >> 10;
 132                 __u64 result = osfs.os_bavail;
 133
 134                 while (blk_size >>= 1)
 135                         result <<= 1;
 136
 137                 *eof = 1;
 138                 rc = snprintf(page, count, LPU64"\n", result);
 139         }
 140         return rc;
 141 }
 142
 143 static int ll_rd_filestotal(char *page, char **start, off_t off, int count,
 144                             int *eof, void *data)
 145 {
 146         struct super_block *sb = (struct super_block *)data;
 147         struct obd_statfs osfs;
 148         int rc;
 149
 150         LASSERT(sb != NULL);
 151         rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - CFS_HZ,
 152                                 OBD_STATFS_NODELAY);
 153         if (!rc) {
 154                  *eof = 1;
 155                  rc = snprintf(page, count, LPU64"\n", osfs.os_files);
 156         }
 157         return rc;
 158 }
 159
 160 static int ll_rd_filesfree(char *page, char **start, off_t off, int count,
 161                            int *eof, void *data)
 162 {
 163         struct super_block *sb = (struct super_block *)data;
 164         struct obd_statfs osfs;
 165         int rc;
 166
 167         LASSERT(sb != NULL);
 168         rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - CFS_HZ,
 169                                 OBD_STATFS_NODELAY);
 170         if (!rc) {
 171                  *eof = 1;
 172                  rc = snprintf(page, count, LPU64"\n", osfs.os_ffree);
 173         }
 174         return rc;
 175
 176 }
 177
 178 static int ll_rd_client_type(char *page, char **start, off_t off, int count,
 179                             int *eof, void *data)
 180 {
 181         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)data);
 182         int rc;
 183
 184         LASSERT(sbi != NULL);
 185
 186         *eof = 1;
 187         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 188                 rc = snprintf(page, count, "remote client\n");
 189         else
 190                 rc = snprintf(page, count, "local client\n");
 191
 192         return rc;
 193 }
 194
 195 static int ll_rd_fstype(char *page, char **start, off_t off, int count,
 196                         int *eof, void *data)
 197 {
 198         struct super_block *sb = (struct super_block*)data;
 199
 200         LASSERT(sb != NULL);
 201         *eof = 1;
 202         return snprintf(page, count, "%s\n", sb->s_type->name);
 203 }
 204
 205 static int ll_rd_sb_uuid(char *page, char **start, off_t off, int count,
 206                          int *eof, void *data)
 207 {
 208         struct super_block *sb = (struct super_block *)data;
 209
 210         LASSERT(sb != NULL);
 211         *eof = 1;
 212         return snprintf(page, count, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
 213 }
 214
 215 static int ll_rd_site_stats(char *page, char **start, off_t off,
 216                             int count, int *eof, void *data)
 217 {
 218         struct super_block *sb = data;
 219
 220         /*
 221          * See description of statistical counters in struct cl_site, and
 222          * struct lu_site.
 223          */
 224         return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site),
 225                                    page, count);
 226 }
 227
 228 static int ll_rd_max_readahead_mb(char *page, char **start, off_t off,
 229                                    int count, int *eof, void *data)
 230 {
 231         struct super_block *sb = data;
 232         struct ll_sb_info *sbi = ll_s2sbi(sb);
 233         long pages_number;
 234         int mult;
 235
 236         cfs_spin_lock(&sbi->ll_lock);
 237         pages_number = sbi->ll_ra_info.ra_max_pages;
 238         cfs_spin_unlock(&sbi->ll_lock);
 239
 240         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 241         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 242 }
 243
 244 static int ll_wr_max_readahead_mb(struct file *file, const char *buffer,
 245                                   unsigned long count, void *data)
 246 {
 247         struct super_block *sb = data;
 248         struct ll_sb_info *sbi = ll_s2sbi(sb);
 249         int mult, rc, pages_number;
 250
 251         mult = 1 << (20 - CFS_PAGE_SHIFT);
 252         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 253         if (rc)
 254                 return rc;
 255
 256         if (pages_number < 0 || pages_number > cfs_num_physpages / 2) {
 257                 CERROR("can't set file readahead more than %lu MB\n",
 258                        cfs_num_physpages >> (20 - CFS_PAGE_SHIFT + 1)); /*1/2 of RAM*/
 259                 return -ERANGE;
 260         }
 261
 262         cfs_spin_lock(&sbi->ll_lock);
 263         sbi->ll_ra_info.ra_max_pages = pages_number;
 264         cfs_spin_unlock(&sbi->ll_lock);
 265
 266         return count;
 267 }
 268
 269 static int ll_rd_max_readahead_per_file_mb(char *page, char **start, off_t off,
 270                                            int count, int *eof, void *data)
 271 {
 272         struct super_block *sb = data;
 273         struct ll_sb_info *sbi = ll_s2sbi(sb);
 274         long pages_number;
 275         int mult;
 276
 277         cfs_spin_lock(&sbi->ll_lock);
 278         pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
 279         cfs_spin_unlock(&sbi->ll_lock);
 280
 281         mult = 1 << (20 - CFS_PAGE_SHIFT);
 282         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 283 }
 284
 285 static int ll_wr_max_readahead_per_file_mb(struct file *file, const char *buffer,
 286                                           unsigned long count, void *data)
 287 {
 288         struct super_block *sb = data;
 289         struct ll_sb_info *sbi = ll_s2sbi(sb);
 290         int mult, rc, pages_number;
 291
 292         mult = 1 << (20 - CFS_PAGE_SHIFT);
 293         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 294         if (rc)
 295                 return rc;
 296
 297         if (pages_number < 0 ||
 298                 pages_number > sbi->ll_ra_info.ra_max_pages) {
 299                 CERROR("can't set file readahead more than"
 300                        "max_read_ahead_mb %lu MB\n",
 301                        sbi->ll_ra_info.ra_max_pages);
 302                 return -ERANGE;
 303         }
 304
 305         cfs_spin_lock(&sbi->ll_lock);
 306         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 307         cfs_spin_unlock(&sbi->ll_lock);
 308
 309         return count;
 310 }
 311
 312 static int ll_rd_max_read_ahead_whole_mb(char *page, char **start, off_t off,
 313                                          int count, int *eof, void *data)
 314 {
 315         struct super_block *sb = data;
 316         struct ll_sb_info *sbi = ll_s2sbi(sb);
 317         long pages_number;
 318         int mult;
 319
 320         cfs_spin_lock(&sbi->ll_lock);
 321         pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
 322         cfs_spin_unlock(&sbi->ll_lock);
 323
 324         mult = 1 << (20 - CFS_PAGE_SHIFT);
 325         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 326 }
 327
 328 static int ll_wr_max_read_ahead_whole_mb(struct file *file, const char *buffer,
 329                                          unsigned long count, void *data)
 330 {
 331         struct super_block *sb = data;
 332         struct ll_sb_info *sbi = ll_s2sbi(sb);
 333         int mult, rc, pages_number;
 334
 335         mult = 1 << (20 - CFS_PAGE_SHIFT);
 336         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 337         if (rc)
 338                 return rc;
 339
 340         /* Cap this at the current max readahead window size, the readahead
 341          * algorithm does this anyway so it's pointless to set it larger. */
 342         if (pages_number < 0 ||
 343             pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
 344                 CERROR("can't set max_read_ahead_whole_mb more than "
 345                        "max_read_ahead_per_file_mb: %lu\n",
 346                         sbi->ll_ra_info.ra_max_pages_per_file >> (20 - CFS_PAGE_SHIFT));
 347                 return -ERANGE;
 348         }
 349
 350         cfs_spin_lock(&sbi->ll_lock);
 351         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 352         cfs_spin_unlock(&sbi->ll_lock);
 353
 354         return count;
 355 }
 356
 357 static int ll_rd_max_cached_mb(char *page, char **start, off_t off,
 358                                int count, int *eof, void *data)
 359 {
 360         struct super_block *sb = data;
 361         struct ll_sb_info *sbi = ll_s2sbi(sb);
 362         long pages_number;
 363         int mult;
 364
 365         cfs_spin_lock(&sbi->ll_lock);
 366         pages_number = sbi->ll_async_page_max;
 367         cfs_spin_unlock(&sbi->ll_lock);
 368
 369         mult = 1 << (20 - CFS_PAGE_SHIFT);
 370         return lprocfs_read_frac_helper(page, count, pages_number, mult);;
 371 }
 372
 373 static int ll_wr_max_cached_mb(struct file *file, const char *buffer,
 374                                unsigned long count, void *data)
 375 {
 376         struct super_block *sb = data;
 377         struct ll_sb_info *sbi = ll_s2sbi(sb);
 378         int mult, rc, pages_number;
 379
 380         mult = 1 << (20 - CFS_PAGE_SHIFT);
 381         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 382         if (rc)
 383                 return rc;
 384
 385         if (pages_number < 0 || pages_number > cfs_num_physpages) {
 386                 CERROR("can't set max cache more than %lu MB\n",
 387                         cfs_num_physpages >> (20 - CFS_PAGE_SHIFT));
 388                 return -ERANGE;
 389         }
 390
 391         cfs_spin_lock(&sbi->ll_lock);
 392         sbi->ll_async_page_max = pages_number ;
 393         cfs_spin_unlock(&sbi->ll_lock);
 394
 395         if (!sbi->ll_dt_exp)
 396                 /* Not set up yet, don't call llap_shrink_cache */
 397                 return count;
 398
 399         return count;
 400 }
 401
 402 static int ll_rd_checksum(char *page, char **start, off_t off,
 403                           int count, int *eof, void *data)
 404 {
 405         struct super_block *sb = data;
 406         struct ll_sb_info *sbi = ll_s2sbi(sb);
 407
 408         return snprintf(page, count, "%u\n",
 409                         (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 410 }
 411
 412 static int ll_wr_checksum(struct file *file, const char *buffer,
 413                           unsigned long count, void *data)
 414 {
 415         struct super_block *sb = data;
 416         struct ll_sb_info *sbi = ll_s2sbi(sb);
 417         int val, rc;
 418
 419         if (!sbi->ll_dt_exp)
 420                 /* Not set up yet */
 421                 return -EAGAIN;
 422
 423         rc = lprocfs_write_helper(buffer, count, &val);
 424         if (rc)
 425                 return rc;
 426         if (val)
 427                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 428         else
 429                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 430
 431         rc = obd_set_info_async(sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 432                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 433         if (rc)
 434                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 435
 436         return count;
 437 }
 438
 439 static int ll_rd_max_rw_chunk(char *page, char **start, off_t off,
 440                           int count, int *eof, void *data)
 441 {
 442         struct super_block *sb = data;
 443
 444         return snprintf(page, count, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk);
 445 }
 446
 447 static int ll_wr_max_rw_chunk(struct file *file, const char *buffer,
 448                           unsigned long count, void *data)
 449 {
 450         struct super_block *sb = data;
 451         int rc, val;
 452
 453         rc = lprocfs_write_helper(buffer, count, &val);
 454         if (rc)
 455                 return rc;
 456         ll_s2sbi(sb)->ll_max_rw_chunk = val;
 457         return count;
 458 }
 459
 460 static int ll_rd_track_id(char *page, int count, void *data,
 461                           enum stats_track_type type)
 462 {
 463         struct super_block *sb = data;
 464
 465         if (ll_s2sbi(sb)->ll_stats_track_type == type) {
 466                 return snprintf(page, count, "%d\n",
 467                                 ll_s2sbi(sb)->ll_stats_track_id);
 468
 469         } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
 470                 return snprintf(page, count, "0 (all)\n");
 471         } else {
 472                 return snprintf(page, count, "untracked\n");
 473         }
 474 }
 475
 476 static int ll_wr_track_id(const char *buffer, unsigned long count, void *data,
 477                           enum stats_track_type type)
 478 {
 479         struct super_block *sb = data;
 480         int rc, pid;
 481
 482         rc = lprocfs_write_helper(buffer, count, &pid);
 483         if (rc)
 484                 return rc;
 485         ll_s2sbi(sb)->ll_stats_track_id = pid;
 486         if (pid == 0)
 487                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 488         else
 489                 ll_s2sbi(sb)->ll_stats_track_type = type;
 490         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 491         return count;
 492 }
 493
 494 static int ll_rd_track_pid(char *page, char **start, off_t off,
 495                           int count, int *eof, void *data)
 496 {
 497         return (ll_rd_track_id(page, count, data, STATS_TRACK_PID));
 498 }
 499
 500 static int ll_wr_track_pid(struct file *file, const char *buffer,
 501                           unsigned long count, void *data)
 502 {
 503         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PID));
 504 }
 505
 506 static int ll_rd_track_ppid(char *page, char **start, off_t off,
 507                           int count, int *eof, void *data)
 508 {
 509         return (ll_rd_track_id(page, count, data, STATS_TRACK_PPID));
 510 }
 511
 512 static int ll_wr_track_ppid(struct file *file, const char *buffer,
 513                           unsigned long count, void *data)
 514 {
 515         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PPID));
 516 }
 517
 518 static int ll_rd_track_gid(char *page, char **start, off_t off,
 519                           int count, int *eof, void *data)
 520 {
 521         return (ll_rd_track_id(page, count, data, STATS_TRACK_GID));
 522 }
 523
 524 static int ll_wr_track_gid(struct file *file, const char *buffer,
 525                           unsigned long count, void *data)
 526 {
 527         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_GID));
 528 }
 529
 530 static int ll_rd_statahead_max(char *page, char **start, off_t off,
 531                                int count, int *eof, void *data)
 532 {
 533         struct super_block *sb = data;
 534         struct ll_sb_info *sbi = ll_s2sbi(sb);
 535
 536         return snprintf(page, count, "%u\n", sbi->ll_sa_max);
 537 }
 538
 539 static int ll_wr_statahead_max(struct file *file, const char *buffer,
 540                                unsigned long count, void *data)
 541 {
 542         struct super_block *sb = data;
 543         struct ll_sb_info *sbi = ll_s2sbi(sb);
 544         int val, rc;
 545
 546         rc = lprocfs_write_helper(buffer, count, &val);
 547         if (rc)
 548                 return rc;
 549
 550         if (val >= 0 && val <= LL_SA_RPC_MAX)
 551                 sbi->ll_sa_max = val;
 552         else
 553                 CERROR("Bad statahead_max value %d. Valid values are in the "
 554                        "range [0, %d]\n", val, LL_SA_RPC_MAX);
 555
 556         return count;
 557 }
 558
 559 static int ll_rd_statahead_stats(char *page, char **start, off_t off,
 560                                  int count, int *eof, void *data)
 561 {
 562         struct super_block *sb = data;
 563         struct ll_sb_info *sbi = ll_s2sbi(sb);
 564
 565         return snprintf(page, count,
 566                         "statahead wrong: %u\n"
 567                         "statahead total: %u\n"
 568                         "ls blocked:      %llu\n"
 569                         "ls cached:       %llu\n"
 570                         "hit count:       %llu\n"
 571                         "miss count:      %llu\n",
 572                         sbi->ll_sa_wrong,
 573                         sbi->ll_sa_total,
 574                         sbi->ll_sa_blocked,
 575                         sbi->ll_sa_cached,
 576                         sbi->ll_sa_hit,
 577                         sbi->ll_sa_miss);
 578 }
 579
 580 static int ll_rd_lazystatfs(char *page, char **start, off_t off,
 581                             int count, int *eof, void *data)
 582 {
 583         struct super_block *sb = data;
 584         struct ll_sb_info *sbi = ll_s2sbi(sb);
 585
 586         return snprintf(page, count, "%u\n",
 587                         (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 588 }
 589
 590 static int ll_wr_lazystatfs(struct file *file, const char *buffer,
 591                             unsigned long count, void *data)
 592 {
 593         struct super_block *sb = data;
 594         struct ll_sb_info *sbi = ll_s2sbi(sb);
 595         int val, rc;
 596
 597         rc = lprocfs_write_helper(buffer, count, &val);
 598         if (rc)
 599                 return rc;
 600
 601         if (val)
 602                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 603         else
 604                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 605
 606         return count;
 607 }
 608
 609 static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 610         { "uuid",         ll_rd_sb_uuid,          0, 0 },
 611         //{ "mntpt_path",   ll_rd_path,             0, 0 },
 612         { "fstype",       ll_rd_fstype,           0, 0 },
 613         { "site",         ll_rd_site_stats,       0, 0 },
 614         { "blocksize",    ll_rd_blksize,          0, 0 },
 615         { "kbytestotal",  ll_rd_kbytestotal,      0, 0 },
 616         { "kbytesfree",   ll_rd_kbytesfree,       0, 0 },
 617         { "kbytesavail",  ll_rd_kbytesavail,      0, 0 },
 618         { "filestotal",   ll_rd_filestotal,       0, 0 },
 619         { "filesfree",    ll_rd_filesfree,        0, 0 },
 620         { "client_type",  ll_rd_client_type,      0, 0 },
 621         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
 622         { "max_read_ahead_mb", ll_rd_max_readahead_mb,
 623                                ll_wr_max_readahead_mb, 0 },
 624         { "max_read_ahead_per_file_mb", ll_rd_max_readahead_per_file_mb,
 625                                         ll_wr_max_readahead_per_file_mb, 0 },
 626         { "max_read_ahead_whole_mb", ll_rd_max_read_ahead_whole_mb,
 627                                      ll_wr_max_read_ahead_whole_mb, 0 },
 628         { "max_cached_mb",    ll_rd_max_cached_mb, ll_wr_max_cached_mb, 0 },
 629         { "checksum_pages",   ll_rd_checksum, ll_wr_checksum, 0 },
 630         { "max_rw_chunk",     ll_rd_max_rw_chunk, ll_wr_max_rw_chunk, 0 },
 631         { "stats_track_pid",  ll_rd_track_pid, ll_wr_track_pid, 0 },
 632         { "stats_track_ppid", ll_rd_track_ppid, ll_wr_track_ppid, 0 },
 633         { "stats_track_gid",  ll_rd_track_gid, ll_wr_track_gid, 0 },
 634         { "statahead_max",    ll_rd_statahead_max, ll_wr_statahead_max, 0 },
 635         { "statahead_stats",  ll_rd_statahead_stats, 0, 0 },
 636         { "lazystatfs",         ll_rd_lazystatfs, ll_wr_lazystatfs, 0 },
 637         { 0 }
 638 };
 639
 640 #define MAX_STRING_SIZE 128
 641
 642 struct llite_file_opcode {
 643         __u32       opcode;
 644         __u32       type;
 645         const char *opname;
 646 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 647         /* file operation */
 648         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 649         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 650         { LPROC_LL_WB_WRITEPAGE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 651                                    "writeback_from_writepage" },
 652         { LPROC_LL_WB_PRESSURE,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 653                                    "writeback_from_pressure" },
 654         { LPROC_LL_WB_OK,          LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 655                                    "writeback_ok_pages" },
 656         { LPROC_LL_WB_FAIL,        LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 657                                    "writeback_failed_pages" },
 658         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 659                                    "read_bytes" },
 660         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 661                                    "write_bytes" },
 662         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 663                                    "brw_read" },
 664         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 665                                    "brw_write" },
 666
 667         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
 668         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 669         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
 670         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
 671         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
 672         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
 673         /* inode operation */
 674         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
 675         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "truncate" },
 676         { LPROC_LL_LOCKLESS_TRUNC, LPROCFS_TYPE_REGS, "lockless_truncate"},
 677         { LPROC_LL_FLOCK,          LPROCFS_TYPE_REGS, "flock" },
 678         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
 679         /* special inode operation */
 680         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
 681         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 682         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 683         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 684         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
 685         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
 686         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
 687         { LPROC_LL_DIRECT_READ,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 688                                    "direct_read" },
 689         { LPROC_LL_DIRECT_WRITE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 690                                    "direct_write" },
 691         { LPROC_LL_LOCKLESS_READ,  LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 692                                    "lockless_read_bytes" },
 693         { LPROC_LL_LOCKLESS_WRITE, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 694                                    "lockless_write_bytes" },
 695
 696 };
 697
 698 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 699 {
 700         if (!sbi->ll_stats)
 701                 return;
 702         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 703                 lprocfs_counter_add(sbi->ll_stats, op, count);
 704         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
 705                  sbi->ll_stats_track_id == current->pid)
 706                 lprocfs_counter_add(sbi->ll_stats, op, count);
 707         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
 708                  sbi->ll_stats_track_id == current->parent->pid)
 709                 lprocfs_counter_add(sbi->ll_stats, op, count);
 710         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 711                  sbi->ll_stats_track_id == current->gid)
 712                 lprocfs_counter_add(sbi->ll_stats, op, count);
 713 }
 714 EXPORT_SYMBOL(ll_stats_ops_tally);
 715
 716 static const char *ra_stat_string[] = {
 717         [RA_STAT_HIT] = "hits",
 718         [RA_STAT_MISS] = "misses",
 719         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 720         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 721         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
 722         [RA_STAT_FAILED_MATCH] = "failed lock match",
 723         [RA_STAT_DISCARDED] = "read but discarded",
 724         [RA_STAT_ZERO_LEN] = "zero length file",
 725         [RA_STAT_ZERO_WINDOW] = "zero size window",
 726         [RA_STAT_EOF] = "read-ahead to EOF",
 727         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 728         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
 729 };
 730
 731
 732 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 733                                 struct super_block *sb, char *osc, char *mdc)
 734 {
 735         struct lprocfs_vars lvars[2];
 736         struct lustre_sb_info *lsi = s2lsi(sb);
 737         struct ll_sb_info *sbi = ll_s2sbi(sb);
 738         struct obd_device *obd;
 739         char name[MAX_STRING_SIZE + 1], *ptr;
 740         int err, id, len, rc;
 741         ENTRY;
 742
 743         memset(lvars, 0, sizeof(lvars));
 744
 745         name[MAX_STRING_SIZE] = '\0';
 746         lvars[0].name = name;
 747
 748         LASSERT(sbi != NULL);
 749         LASSERT(mdc != NULL);
 750         LASSERT(osc != NULL);
 751
 752         /* Get fsname */
 753         len = strlen(lsi->lsi_lmd->lmd_profile);
 754         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
 755         if (ptr && (strcmp(ptr, "-client") == 0))
 756                 len -= 7;
 757
 758         /* Mount info */
 759         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
 760                  lsi->lsi_lmd->lmd_profile, sb);
 761
 762         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 763         if (IS_ERR(sbi->ll_proc_root)) {
 764                 err = PTR_ERR(sbi->ll_proc_root);
 765                 sbi->ll_proc_root = NULL;
 766                 RETURN(err);
 767         }
 768
 769         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
 770                                 &vvp_dump_pgcache_file_ops, sbi);
 771         if (rc)
 772                 CWARN("Error adding the dump_page_cache file\n");
 773
 774         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
 775                                 &ll_rw_extents_stats_fops, sbi);
 776         if (rc)
 777                 CWARN("Error adding the extent_stats file\n");
 778
 779         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
 780                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
 781         if (rc)
 782                 CWARN("Error adding the extents_stats_per_process file\n");
 783
 784         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
 785                                 &ll_rw_offset_stats_fops, sbi);
 786         if (rc)
 787                 CWARN("Error adding the offset_stats file\n");
 788
 789         /* File operations stats */
 790         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
 791                                             LPROCFS_STATS_FLAG_NONE);
 792         if (sbi->ll_stats == NULL)
 793                 GOTO(out, err = -ENOMEM);
 794         /* do counter init */
 795         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 796                 __u32 type = llite_opcode_table[id].type;
 797                 void *ptr = NULL;
 798                 if (type & LPROCFS_TYPE_REGS)
 799                         ptr = "regs";
 800                 else if (type & LPROCFS_TYPE_BYTES)
 801                         ptr = "bytes";
 802                 else if (type & LPROCFS_TYPE_PAGES)
 803                         ptr = "pages";
 804                 lprocfs_counter_init(sbi->ll_stats,
 805                                      llite_opcode_table[id].opcode,
 806                                      (type & LPROCFS_CNTR_AVGMINMAX),
 807                                      llite_opcode_table[id].opname, ptr);
 808         }
 809         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
 810         if (err)
 811                 GOTO(out, err);
 812
 813         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
 814                                                LPROCFS_STATS_FLAG_NONE);
 815         if (sbi->ll_ra_stats == NULL)
 816                 GOTO(out, err = -ENOMEM);
 817
 818         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
 819                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
 820                                      ra_stat_string[id], "pages");
 821         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
 822                                      sbi->ll_ra_stats);
 823         if (err)
 824                 GOTO(out, err);
 825
 826
 827         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
 828         if (err)
 829                 GOTO(out, err);
 830
 831         /* MDC info */
 832         obd = class_name2obd(mdc);
 833
 834         LASSERT(obd != NULL);
 835         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 836         LASSERT(obd->obd_type->typ_name != NULL);
 837
 838         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 839                  obd->obd_type->typ_name);
 840         lvars[0].read_fptr = lprocfs_rd_name;
 841         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 842         if (err)
 843                 GOTO(out, err);
 844
 845         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 846         lvars[0].read_fptr = lprocfs_rd_uuid;
 847         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 848         if (err)
 849                 GOTO(out, err);
 850
 851         /* OSC */
 852         obd = class_name2obd(osc);
 853
 854         LASSERT(obd != NULL);
 855         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 856         LASSERT(obd->obd_type->typ_name != NULL);
 857
 858         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 859                  obd->obd_type->typ_name);
 860         lvars[0].read_fptr = lprocfs_rd_name;
 861         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 862         if (err)
 863                 GOTO(out, err);
 864
 865         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 866         lvars[0].read_fptr = lprocfs_rd_uuid;
 867         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 868 out:
 869         if (err) {
 870                 lprocfs_remove(&sbi->ll_proc_root);
 871                 lprocfs_free_stats(&sbi->ll_ra_stats);
 872                 lprocfs_free_stats(&sbi->ll_stats);
 873         }
 874         RETURN(err);
 875 }
 876
 877 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
 878 {
 879         if (sbi->ll_proc_root) {
 880                 lprocfs_remove(&sbi->ll_proc_root);
 881                 lprocfs_free_stats(&sbi->ll_ra_stats);
 882                 lprocfs_free_stats(&sbi->ll_stats);
 883         }
 884 }
 885 #undef MAX_STRING_SIZE
 886
 887 #define pct(a,b) (b ? a * 100 / b : 0)
 888
 889 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
 890                                    struct seq_file *seq, int which)
 891 {
 892         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 893         unsigned long start, end, r, w;
 894         char *unitp = "KMGTPEZY";
 895         int i, units = 10;
 896         struct per_process_info *pp_info = &io_extents->pp_extents[which];
 897
 898         read_cum = 0;
 899         write_cum = 0;
 900         start = 0;
 901
 902         for(i = 0; i < LL_HIST_MAX; i++) {
 903                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
 904                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
 905         }
 906
 907         for(i = 0; i < LL_HIST_MAX; i++) {
 908                 r = pp_info->pp_r_hist.oh_buckets[i];
 909                 w = pp_info->pp_w_hist.oh_buckets[i];
 910                 read_cum += r;
 911                 write_cum += w;
 912                 end = 1 << (i + LL_HIST_START - units);
 913                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
 914                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
 915                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
 916                            r, pct(r, read_tot), pct(read_cum, read_tot),
 917                            w, pct(w, write_tot), pct(write_cum, write_tot));
 918                 start = end;
 919                 if (start == 1<<10) {
 920                         start = 1;
 921                         units += 10;
 922                         unitp++;
 923                 }
 924                 if (read_cum == read_tot && write_cum == write_tot)
 925                         break;
 926         }
 927 }
 928
 929 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
 930 {
 931         struct timeval now;
 932         struct ll_sb_info *sbi = seq->private;
 933         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
 934         int k;
 935
 936         cfs_gettimeofday(&now);
 937
 938         if (!sbi->ll_rw_stats_on) {
 939                 seq_printf(seq, "disabled\n"
 940                                 "write anything in this file to activate, "
 941                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
 942                 return 0;
 943         }
 944         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 945                    now.tv_sec, now.tv_usec);
 946         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
 947         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
 948                    "extents", "calls", "%", "cum%",
 949                    "calls", "%", "cum%");
 950         cfs_spin_lock(&sbi->ll_pp_extent_lock);
 951         for(k = 0; k < LL_PROCESS_HIST_MAX; k++) {
 952                 if(io_extents->pp_extents[k].pid != 0) {
 953                         seq_printf(seq, "\nPID: %d\n",
 954                                    io_extents->pp_extents[k].pid);
 955                         ll_display_extents_info(io_extents, seq, k);
 956                 }
 957         }
 958         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
 959         return 0;
 960 }
 961
 962 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
 963                                                 const char *buf, size_t len,
 964                                                 loff_t *off)
 965 {
 966         struct seq_file *seq = file->private_data;
 967         struct ll_sb_info *sbi = seq->private;
 968         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
 969         int i;
 970         int value = 1, rc = 0;
 971
 972         rc = lprocfs_write_helper(buf, len, &value);
 973         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
 974                        strcmp(buf, "Disabled") == 0))
 975                 value = 0;
 976
 977         if (value == 0)
 978                 sbi->ll_rw_stats_on = 0;
 979         else
 980                 sbi->ll_rw_stats_on = 1;
 981
 982         cfs_spin_lock(&sbi->ll_pp_extent_lock);
 983         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
 984                 io_extents->pp_extents[i].pid = 0;
 985                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
 986                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
 987         }
 988         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
 989         return len;
 990 }
 991
 992 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
 993
 994 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
 995 {
 996         struct timeval now;
 997         struct ll_sb_info *sbi = seq->private;
 998         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
 999
1000         cfs_gettimeofday(&now);
1001
1002         if (!sbi->ll_rw_stats_on) {
1003                 seq_printf(seq, "disabled\n"
1004                                 "write anything in this file to activate, "
1005                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1006                 return 0;
1007         }
1008         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1009                    now.tv_sec, now.tv_usec);
1010
1011         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1012         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1013                    "extents", "calls", "%", "cum%",
1014                    "calls", "%", "cum%");
1015         cfs_spin_lock(&sbi->ll_lock);
1016         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1017         cfs_spin_unlock(&sbi->ll_lock);
1018
1019         return 0;
1020 }
1021
1022 static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf,
1023                                         size_t len, loff_t *off)
1024 {
1025         struct seq_file *seq = file->private_data;
1026         struct ll_sb_info *sbi = seq->private;
1027         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1028         int i;
1029         int value = 1, rc = 0;
1030
1031         rc = lprocfs_write_helper(buf, len, &value);
1032         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1033                        strcmp(buf, "Disabled") == 0))
1034                 value = 0;
1035
1036         if (value == 0)
1037                 sbi->ll_rw_stats_on = 0;
1038         else
1039                 sbi->ll_rw_stats_on = 1;
1040         cfs_spin_lock(&sbi->ll_pp_extent_lock);
1041         for(i = 0; i <= LL_PROCESS_HIST_MAX; i++)
1042         {
1043                 io_extents->pp_extents[i].pid = 0;
1044                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1045                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1046         }
1047         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
1048
1049         return len;
1050 }
1051
1052 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1053
1054 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1055                        struct ll_file_data *file, loff_t pos,
1056                        size_t count, int rw)
1057 {
1058         int i, cur = -1;
1059         struct ll_rw_process_info *process;
1060         struct ll_rw_process_info *offset;
1061         int *off_count = &sbi->ll_rw_offset_entry_count;
1062         int *process_count = &sbi->ll_offset_process_count;
1063         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1064
1065         if(!sbi->ll_rw_stats_on)
1066                 return;
1067         process = sbi->ll_rw_process_info;
1068         offset = sbi->ll_rw_offset_info;
1069
1070         cfs_spin_lock(&sbi->ll_pp_extent_lock);
1071         /* Extent statistics */
1072         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1073                 if(io_extents->pp_extents[i].pid == pid) {
1074                         cur = i;
1075                         break;
1076                 }
1077         }
1078
1079         if (cur == -1) {
1080                 /* new process */
1081                 sbi->ll_extent_process_count =
1082                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1083                 cur = sbi->ll_extent_process_count;
1084                 io_extents->pp_extents[cur].pid = pid;
1085                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1086                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1087         }
1088
1089         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1090              (i < (LL_HIST_MAX - 1)); i++);
1091         if (rw == 0) {
1092                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1093                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1094         } else {
1095                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1096                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1097         }
1098         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
1099
1100         cfs_spin_lock(&sbi->ll_process_lock);
1101         /* Offset statistics */
1102         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1103                 if (process[i].rw_pid == pid) {
1104                         if (process[i].rw_last_file != file) {
1105                                 process[i].rw_range_start = pos;
1106                                 process[i].rw_last_file_pos = pos + count;
1107                                 process[i].rw_smallest_extent = count;
1108                                 process[i].rw_largest_extent = count;
1109                                 process[i].rw_offset = 0;
1110                                 process[i].rw_last_file = file;
1111                                 cfs_spin_unlock(&sbi->ll_process_lock);
1112                                 return;
1113                         }
1114                         if (process[i].rw_last_file_pos != pos) {
1115                                 *off_count =
1116                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1117                                 offset[*off_count].rw_op = process[i].rw_op;
1118                                 offset[*off_count].rw_pid = pid;
1119                                 offset[*off_count].rw_range_start =
1120                                         process[i].rw_range_start;
1121                                 offset[*off_count].rw_range_end =
1122                                         process[i].rw_last_file_pos;
1123                                 offset[*off_count].rw_smallest_extent =
1124                                         process[i].rw_smallest_extent;
1125                                 offset[*off_count].rw_largest_extent =
1126                                         process[i].rw_largest_extent;
1127                                 offset[*off_count].rw_offset =
1128                                         process[i].rw_offset;
1129                                 process[i].rw_op = rw;
1130                                 process[i].rw_range_start = pos;
1131                                 process[i].rw_smallest_extent = count;
1132                                 process[i].rw_largest_extent = count;
1133                                 process[i].rw_offset = pos -
1134                                         process[i].rw_last_file_pos;
1135                         }
1136                         if(process[i].rw_smallest_extent > count)
1137                                 process[i].rw_smallest_extent = count;
1138                         if(process[i].rw_largest_extent < count)
1139                                 process[i].rw_largest_extent = count;
1140                         process[i].rw_last_file_pos = pos + count;
1141                         cfs_spin_unlock(&sbi->ll_process_lock);
1142                         return;
1143                 }
1144         }
1145         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1146         process[*process_count].rw_pid = pid;
1147         process[*process_count].rw_op = rw;
1148         process[*process_count].rw_range_start = pos;
1149         process[*process_count].rw_last_file_pos = pos + count;
1150         process[*process_count].rw_smallest_extent = count;
1151         process[*process_count].rw_largest_extent = count;
1152         process[*process_count].rw_offset = 0;
1153         process[*process_count].rw_last_file = file;
1154         cfs_spin_unlock(&sbi->ll_process_lock);
1155 }
1156
1157 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1158 {
1159         struct timeval now;
1160         struct ll_sb_info *sbi = seq->private;
1161         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1162         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1163         int i;
1164
1165         cfs_gettimeofday(&now);
1166
1167         if (!sbi->ll_rw_stats_on) {
1168                 seq_printf(seq, "disabled\n"
1169                                 "write anything in this file to activate, "
1170                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1171                 return 0;
1172         }
1173         cfs_spin_lock(&sbi->ll_process_lock);
1174
1175         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1176                    now.tv_sec, now.tv_usec);
1177         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1178                    "R/W", "PID", "RANGE START", "RANGE END",
1179                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1180         /* We stored the discontiguous offsets here; print them first */
1181         for(i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1182                 if (offset[i].rw_pid != 0)
1183                         seq_printf(seq,"%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1184                                    offset[i].rw_op ? 'W' : 'R',
1185                                    offset[i].rw_pid,
1186                                    offset[i].rw_range_start,
1187                                    offset[i].rw_range_end,
1188                                    (unsigned long)offset[i].rw_smallest_extent,
1189                                    (unsigned long)offset[i].rw_largest_extent,
1190                                    offset[i].rw_offset);
1191         }
1192         /* Then print the current offsets for each process */
1193         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1194                 if (process[i].rw_pid != 0)
1195                         seq_printf(seq,"%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1196                                    process[i].rw_op ? 'W' : 'R',
1197                                    process[i].rw_pid,
1198                                    process[i].rw_range_start,
1199                                    process[i].rw_last_file_pos,
1200                                    (unsigned long)process[i].rw_smallest_extent,
1201                                    (unsigned long)process[i].rw_largest_extent,
1202                                    process[i].rw_offset);
1203         }
1204         cfs_spin_unlock(&sbi->ll_process_lock);
1205
1206         return 0;
1207 }
1208
1209 static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf,
1210                                        size_t len, loff_t *off)
1211 {
1212         struct seq_file *seq = file->private_data;
1213         struct ll_sb_info *sbi = seq->private;
1214         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1215         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1216         int value = 1, rc = 0;
1217
1218         rc = lprocfs_write_helper(buf, len, &value);
1219
1220         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1221                            strcmp(buf, "Disabled") == 0))
1222                 value = 0;
1223
1224         if (value == 0)
1225                 sbi->ll_rw_stats_on = 0;
1226         else
1227                 sbi->ll_rw_stats_on = 1;
1228
1229         cfs_spin_lock(&sbi->ll_process_lock);
1230         sbi->ll_offset_process_count = 0;
1231         sbi->ll_rw_offset_entry_count = 0;
1232         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1233                LL_PROCESS_HIST_MAX);
1234         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1235                LL_OFFSET_HIST_MAX);
1236         cfs_spin_unlock(&sbi->ll_process_lock);
1237
1238         return len;
1239 }
1240
1241 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1242
1243 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
1244 {
1245     lvars->module_vars  = NULL;
1246     lvars->obd_vars     = lprocfs_llite_obd_vars;
1247 }
1248 #endif /* LPROCFS */