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 (c) 2002, 2010, Oracle and/or its affiliates. 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,
  64                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  65                                 OBD_STATFS_NODELAY);
  66         if (!rc) {
  67               *eof = 1;
  68               rc = snprintf(page, count, "%u\n", osfs.os_bsize);
  69         }
  70
  71         return rc;
  72 }
  73
  74 static int ll_rd_kbytestotal(char *page, char **start, off_t off, int count,
  75                              int *eof, void *data)
  76 {
  77         struct super_block *sb = (struct super_block *)data;
  78         struct obd_statfs osfs;
  79         int rc;
  80
  81         LASSERT(sb != NULL);
  82         rc = ll_statfs_internal(sb, &osfs,
  83                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  84                                 OBD_STATFS_NODELAY);
  85         if (!rc) {
  86                 __u32 blk_size = osfs.os_bsize >> 10;
  87                 __u64 result = osfs.os_blocks;
  88
  89                 while (blk_size >>= 1)
  90                         result <<= 1;
  91
  92                 *eof = 1;
  93                 rc = snprintf(page, count, LPU64"\n", result);
  94         }
  95         return rc;
  96
  97 }
  98
  99 static int ll_rd_kbytesfree(char *page, char **start, off_t off, int count,
 100                             int *eof, void *data)
 101 {
 102         struct super_block *sb = (struct super_block *)data;
 103         struct obd_statfs osfs;
 104         int rc;
 105
 106         LASSERT(sb != NULL);
 107         rc = ll_statfs_internal(sb, &osfs,
 108                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 109                                 OBD_STATFS_NODELAY);
 110         if (!rc) {
 111                 __u32 blk_size = osfs.os_bsize >> 10;
 112                 __u64 result = osfs.os_bfree;
 113
 114                 while (blk_size >>= 1)
 115                         result <<= 1;
 116
 117                 *eof = 1;
 118                 rc = snprintf(page, count, LPU64"\n", result);
 119         }
 120         return rc;
 121 }
 122
 123 static int ll_rd_kbytesavail(char *page, char **start, off_t off, int count,
 124                              int *eof, void *data)
 125 {
 126         struct super_block *sb = (struct super_block *)data;
 127         struct obd_statfs osfs;
 128         int rc;
 129
 130         LASSERT(sb != NULL);
 131         rc = ll_statfs_internal(sb, &osfs,
 132                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 133                                 OBD_STATFS_NODELAY);
 134         if (!rc) {
 135                 __u32 blk_size = osfs.os_bsize >> 10;
 136                 __u64 result = osfs.os_bavail;
 137
 138                 while (blk_size >>= 1)
 139                         result <<= 1;
 140
 141                 *eof = 1;
 142                 rc = snprintf(page, count, LPU64"\n", result);
 143         }
 144         return rc;
 145 }
 146
 147 static int ll_rd_filestotal(char *page, char **start, off_t off, int count,
 148                             int *eof, void *data)
 149 {
 150         struct super_block *sb = (struct super_block *)data;
 151         struct obd_statfs osfs;
 152         int rc;
 153
 154         LASSERT(sb != NULL);
 155         rc = ll_statfs_internal(sb, &osfs,
 156                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 157                                 OBD_STATFS_NODELAY);
 158         if (!rc) {
 159                  *eof = 1;
 160                  rc = snprintf(page, count, LPU64"\n", osfs.os_files);
 161         }
 162         return rc;
 163 }
 164
 165 static int ll_rd_filesfree(char *page, char **start, off_t off, int count,
 166                            int *eof, void *data)
 167 {
 168         struct super_block *sb = (struct super_block *)data;
 169         struct obd_statfs osfs;
 170         int rc;
 171
 172         LASSERT(sb != NULL);
 173         rc = ll_statfs_internal(sb, &osfs,
 174                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 175                                 OBD_STATFS_NODELAY);
 176         if (!rc) {
 177                  *eof = 1;
 178                  rc = snprintf(page, count, LPU64"\n", osfs.os_ffree);
 179         }
 180         return rc;
 181
 182 }
 183
 184 static int ll_rd_client_type(char *page, char **start, off_t off, int count,
 185                             int *eof, void *data)
 186 {
 187         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)data);
 188         int rc;
 189
 190         LASSERT(sbi != NULL);
 191
 192         *eof = 1;
 193         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 194                 rc = snprintf(page, count, "remote client\n");
 195         else
 196                 rc = snprintf(page, count, "local client\n");
 197
 198         return rc;
 199 }
 200
 201 static int ll_rd_fstype(char *page, char **start, off_t off, int count,
 202                         int *eof, void *data)
 203 {
 204         struct super_block *sb = (struct super_block*)data;
 205
 206         LASSERT(sb != NULL);
 207         *eof = 1;
 208         return snprintf(page, count, "%s\n", sb->s_type->name);
 209 }
 210
 211 static int ll_rd_sb_uuid(char *page, char **start, off_t off, int count,
 212                          int *eof, void *data)
 213 {
 214         struct super_block *sb = (struct super_block *)data;
 215
 216         LASSERT(sb != NULL);
 217         *eof = 1;
 218         return snprintf(page, count, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
 219 }
 220
 221 static int ll_rd_site_stats(char *page, char **start, off_t off,
 222                             int count, int *eof, void *data)
 223 {
 224         struct super_block *sb = data;
 225
 226         /*
 227          * See description of statistical counters in struct cl_site, and
 228          * struct lu_site.
 229          */
 230         return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site),
 231                                    page, count);
 232 }
 233
 234 static int ll_rd_max_readahead_mb(char *page, char **start, off_t off,
 235                                    int count, int *eof, void *data)
 236 {
 237         struct super_block *sb = data;
 238         struct ll_sb_info *sbi = ll_s2sbi(sb);
 239         long pages_number;
 240         int mult;
 241
 242         cfs_spin_lock(&sbi->ll_lock);
 243         pages_number = sbi->ll_ra_info.ra_max_pages;
 244         cfs_spin_unlock(&sbi->ll_lock);
 245
 246         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 247         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 248 }
 249
 250 static int ll_wr_max_readahead_mb(struct file *file, const char *buffer,
 251                                   unsigned long count, void *data)
 252 {
 253         struct super_block *sb = data;
 254         struct ll_sb_info *sbi = ll_s2sbi(sb);
 255         int mult, rc, pages_number;
 256
 257         mult = 1 << (20 - CFS_PAGE_SHIFT);
 258         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 259         if (rc)
 260                 return rc;
 261
 262         if (pages_number < 0 || pages_number > cfs_num_physpages / 2) {
 263                 CERROR("can't set file readahead more than %lu MB\n",
 264                        cfs_num_physpages >> (20 - CFS_PAGE_SHIFT + 1)); /*1/2 of RAM*/
 265                 return -ERANGE;
 266         }
 267
 268         cfs_spin_lock(&sbi->ll_lock);
 269         sbi->ll_ra_info.ra_max_pages = pages_number;
 270         cfs_spin_unlock(&sbi->ll_lock);
 271
 272         return count;
 273 }
 274
 275 static int ll_rd_max_readahead_per_file_mb(char *page, char **start, off_t off,
 276                                            int count, int *eof, void *data)
 277 {
 278         struct super_block *sb = data;
 279         struct ll_sb_info *sbi = ll_s2sbi(sb);
 280         long pages_number;
 281         int mult;
 282
 283         cfs_spin_lock(&sbi->ll_lock);
 284         pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
 285         cfs_spin_unlock(&sbi->ll_lock);
 286
 287         mult = 1 << (20 - CFS_PAGE_SHIFT);
 288         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 289 }
 290
 291 static int ll_wr_max_readahead_per_file_mb(struct file *file, const char *buffer,
 292                                           unsigned long count, void *data)
 293 {
 294         struct super_block *sb = data;
 295         struct ll_sb_info *sbi = ll_s2sbi(sb);
 296         int mult, rc, pages_number;
 297
 298         mult = 1 << (20 - CFS_PAGE_SHIFT);
 299         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 300         if (rc)
 301                 return rc;
 302
 303         if (pages_number < 0 ||
 304                 pages_number > sbi->ll_ra_info.ra_max_pages) {
 305                 CERROR("can't set file readahead more than"
 306                        "max_read_ahead_mb %lu MB\n",
 307                        sbi->ll_ra_info.ra_max_pages);
 308                 return -ERANGE;
 309         }
 310
 311         cfs_spin_lock(&sbi->ll_lock);
 312         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 313         cfs_spin_unlock(&sbi->ll_lock);
 314
 315         return count;
 316 }
 317
 318 static int ll_rd_max_read_ahead_whole_mb(char *page, char **start, off_t off,
 319                                          int count, int *eof, void *data)
 320 {
 321         struct super_block *sb = data;
 322         struct ll_sb_info *sbi = ll_s2sbi(sb);
 323         long pages_number;
 324         int mult;
 325
 326         cfs_spin_lock(&sbi->ll_lock);
 327         pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
 328         cfs_spin_unlock(&sbi->ll_lock);
 329
 330         mult = 1 << (20 - CFS_PAGE_SHIFT);
 331         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 332 }
 333
 334 static int ll_wr_max_read_ahead_whole_mb(struct file *file, const char *buffer,
 335                                          unsigned long count, void *data)
 336 {
 337         struct super_block *sb = data;
 338         struct ll_sb_info *sbi = ll_s2sbi(sb);
 339         int mult, rc, pages_number;
 340
 341         mult = 1 << (20 - CFS_PAGE_SHIFT);
 342         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 343         if (rc)
 344                 return rc;
 345
 346         /* Cap this at the current max readahead window size, the readahead
 347          * algorithm does this anyway so it's pointless to set it larger. */
 348         if (pages_number < 0 ||
 349             pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
 350                 CERROR("can't set max_read_ahead_whole_mb more than "
 351                        "max_read_ahead_per_file_mb: %lu\n",
 352                         sbi->ll_ra_info.ra_max_pages_per_file >> (20 - CFS_PAGE_SHIFT));
 353                 return -ERANGE;
 354         }
 355
 356         cfs_spin_lock(&sbi->ll_lock);
 357         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 358         cfs_spin_unlock(&sbi->ll_lock);
 359
 360         return count;
 361 }
 362
 363 static int ll_rd_max_cached_mb(char *page, char **start, off_t off,
 364                                int count, int *eof, void *data)
 365 {
 366         struct super_block *sb = data;
 367         struct ll_sb_info *sbi = ll_s2sbi(sb);
 368         long pages_number;
 369         int mult;
 370
 371         cfs_spin_lock(&sbi->ll_lock);
 372         pages_number = sbi->ll_async_page_max;
 373         cfs_spin_unlock(&sbi->ll_lock);
 374
 375         mult = 1 << (20 - CFS_PAGE_SHIFT);
 376         return lprocfs_read_frac_helper(page, count, pages_number, mult);;
 377 }
 378
 379 static int ll_wr_max_cached_mb(struct file *file, const char *buffer,
 380                                unsigned long count, void *data)
 381 {
 382         struct super_block *sb = data;
 383         struct ll_sb_info *sbi = ll_s2sbi(sb);
 384         int mult, rc, pages_number;
 385
 386         mult = 1 << (20 - CFS_PAGE_SHIFT);
 387         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 388         if (rc)
 389                 return rc;
 390
 391         if (pages_number < 0 || pages_number > cfs_num_physpages) {
 392                 CERROR("can't set max cache more than %lu MB\n",
 393                         cfs_num_physpages >> (20 - CFS_PAGE_SHIFT));
 394                 return -ERANGE;
 395         }
 396
 397         cfs_spin_lock(&sbi->ll_lock);
 398         sbi->ll_async_page_max = pages_number ;
 399         cfs_spin_unlock(&sbi->ll_lock);
 400
 401         if (!sbi->ll_dt_exp)
 402                 /* Not set up yet, don't call llap_shrink_cache */
 403                 return count;
 404
 405         return count;
 406 }
 407
 408 static int ll_rd_checksum(char *page, char **start, off_t off,
 409                           int count, int *eof, void *data)
 410 {
 411         struct super_block *sb = data;
 412         struct ll_sb_info *sbi = ll_s2sbi(sb);
 413
 414         return snprintf(page, count, "%u\n",
 415                         (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 416 }
 417
 418 static int ll_wr_checksum(struct file *file, const char *buffer,
 419                           unsigned long count, void *data)
 420 {
 421         struct super_block *sb = data;
 422         struct ll_sb_info *sbi = ll_s2sbi(sb);
 423         int val, rc;
 424
 425         if (!sbi->ll_dt_exp)
 426                 /* Not set up yet */
 427                 return -EAGAIN;
 428
 429         rc = lprocfs_write_helper(buffer, count, &val);
 430         if (rc)
 431                 return rc;
 432         if (val)
 433                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 434         else
 435                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 436
 437         rc = obd_set_info_async(sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 438                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 439         if (rc)
 440                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 441
 442         return count;
 443 }
 444
 445 static int ll_rd_max_rw_chunk(char *page, char **start, off_t off,
 446                           int count, int *eof, void *data)
 447 {
 448         struct super_block *sb = data;
 449
 450         return snprintf(page, count, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk);
 451 }
 452
 453 static int ll_wr_max_rw_chunk(struct file *file, const char *buffer,
 454                           unsigned long count, void *data)
 455 {
 456         struct super_block *sb = data;
 457         int rc, val;
 458
 459         rc = lprocfs_write_helper(buffer, count, &val);
 460         if (rc)
 461                 return rc;
 462         ll_s2sbi(sb)->ll_max_rw_chunk = val;
 463         return count;
 464 }
 465
 466 static int ll_rd_track_id(char *page, int count, void *data,
 467                           enum stats_track_type type)
 468 {
 469         struct super_block *sb = data;
 470
 471         if (ll_s2sbi(sb)->ll_stats_track_type == type) {
 472                 return snprintf(page, count, "%d\n",
 473                                 ll_s2sbi(sb)->ll_stats_track_id);
 474
 475         } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
 476                 return snprintf(page, count, "0 (all)\n");
 477         } else {
 478                 return snprintf(page, count, "untracked\n");
 479         }
 480 }
 481
 482 static int ll_wr_track_id(const char *buffer, unsigned long count, void *data,
 483                           enum stats_track_type type)
 484 {
 485         struct super_block *sb = data;
 486         int rc, pid;
 487
 488         rc = lprocfs_write_helper(buffer, count, &pid);
 489         if (rc)
 490                 return rc;
 491         ll_s2sbi(sb)->ll_stats_track_id = pid;
 492         if (pid == 0)
 493                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 494         else
 495                 ll_s2sbi(sb)->ll_stats_track_type = type;
 496         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 497         return count;
 498 }
 499
 500 static int ll_rd_track_pid(char *page, char **start, off_t off,
 501                           int count, int *eof, void *data)
 502 {
 503         return (ll_rd_track_id(page, count, data, STATS_TRACK_PID));
 504 }
 505
 506 static int ll_wr_track_pid(struct file *file, const char *buffer,
 507                           unsigned long count, void *data)
 508 {
 509         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PID));
 510 }
 511
 512 static int ll_rd_track_ppid(char *page, char **start, off_t off,
 513                           int count, int *eof, void *data)
 514 {
 515         return (ll_rd_track_id(page, count, data, STATS_TRACK_PPID));
 516 }
 517
 518 static int ll_wr_track_ppid(struct file *file, const char *buffer,
 519                           unsigned long count, void *data)
 520 {
 521         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PPID));
 522 }
 523
 524 static int ll_rd_track_gid(char *page, char **start, off_t off,
 525                           int count, int *eof, void *data)
 526 {
 527         return (ll_rd_track_id(page, count, data, STATS_TRACK_GID));
 528 }
 529
 530 static int ll_wr_track_gid(struct file *file, const char *buffer,
 531                           unsigned long count, void *data)
 532 {
 533         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_GID));
 534 }
 535
 536 static int ll_rd_statahead_max(char *page, char **start, off_t off,
 537                                int count, int *eof, void *data)
 538 {
 539         struct super_block *sb = data;
 540         struct ll_sb_info *sbi = ll_s2sbi(sb);
 541
 542         return snprintf(page, count, "%u\n", sbi->ll_sa_max);
 543 }
 544
 545 static int ll_wr_statahead_max(struct file *file, const char *buffer,
 546                                unsigned long count, void *data)
 547 {
 548         struct super_block *sb = data;
 549         struct ll_sb_info *sbi = ll_s2sbi(sb);
 550         int val, rc;
 551
 552         rc = lprocfs_write_helper(buffer, count, &val);
 553         if (rc)
 554                 return rc;
 555
 556         if (val >= 0 && val <= LL_SA_RPC_MAX)
 557                 sbi->ll_sa_max = val;
 558         else
 559                 CERROR("Bad statahead_max value %d. Valid values are in the "
 560                        "range [0, %d]\n", val, LL_SA_RPC_MAX);
 561
 562         return count;
 563 }
 564
 565 static int ll_rd_statahead_stats(char *page, char **start, off_t off,
 566                                  int count, int *eof, void *data)
 567 {
 568         struct super_block *sb = data;
 569         struct ll_sb_info *sbi = ll_s2sbi(sb);
 570
 571         return snprintf(page, count,
 572                         "statahead total: %u\n"
 573                         "statahead wrong: %u\n",
 574                         atomic_read(&sbi->ll_sa_total),
 575                         atomic_read(&sbi->ll_sa_wrong));
 576 }
 577
 578 static int ll_rd_lazystatfs(char *page, char **start, off_t off,
 579                             int count, int *eof, void *data)
 580 {
 581         struct super_block *sb = data;
 582         struct ll_sb_info *sbi = ll_s2sbi(sb);
 583
 584         return snprintf(page, count, "%u\n",
 585                         (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 586 }
 587
 588 static int ll_wr_lazystatfs(struct file *file, const char *buffer,
 589                             unsigned long count, void *data)
 590 {
 591         struct super_block *sb = data;
 592         struct ll_sb_info *sbi = ll_s2sbi(sb);
 593         int val, rc;
 594
 595         rc = lprocfs_write_helper(buffer, count, &val);
 596         if (rc)
 597                 return rc;
 598
 599         if (val)
 600                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 601         else
 602                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 603
 604         return count;
 605 }
 606
 607 static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 608         { "uuid",         ll_rd_sb_uuid,          0, 0 },
 609         //{ "mntpt_path",   ll_rd_path,             0, 0 },
 610         { "fstype",       ll_rd_fstype,           0, 0 },
 611         { "site",         ll_rd_site_stats,       0, 0 },
 612         { "blocksize",    ll_rd_blksize,          0, 0 },
 613         { "kbytestotal",  ll_rd_kbytestotal,      0, 0 },
 614         { "kbytesfree",   ll_rd_kbytesfree,       0, 0 },
 615         { "kbytesavail",  ll_rd_kbytesavail,      0, 0 },
 616         { "filestotal",   ll_rd_filestotal,       0, 0 },
 617         { "filesfree",    ll_rd_filesfree,        0, 0 },
 618         { "client_type",  ll_rd_client_type,      0, 0 },
 619         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
 620         { "max_read_ahead_mb", ll_rd_max_readahead_mb,
 621                                ll_wr_max_readahead_mb, 0 },
 622         { "max_read_ahead_per_file_mb", ll_rd_max_readahead_per_file_mb,
 623                                         ll_wr_max_readahead_per_file_mb, 0 },
 624         { "max_read_ahead_whole_mb", ll_rd_max_read_ahead_whole_mb,
 625                                      ll_wr_max_read_ahead_whole_mb, 0 },
 626         { "max_cached_mb",    ll_rd_max_cached_mb, ll_wr_max_cached_mb, 0 },
 627         { "checksum_pages",   ll_rd_checksum, ll_wr_checksum, 0 },
 628         { "max_rw_chunk",     ll_rd_max_rw_chunk, ll_wr_max_rw_chunk, 0 },
 629         { "stats_track_pid",  ll_rd_track_pid, ll_wr_track_pid, 0 },
 630         { "stats_track_ppid", ll_rd_track_ppid, ll_wr_track_ppid, 0 },
 631         { "stats_track_gid",  ll_rd_track_gid, ll_wr_track_gid, 0 },
 632         { "statahead_max",    ll_rd_statahead_max, ll_wr_statahead_max, 0 },
 633         { "statahead_stats",  ll_rd_statahead_stats, 0, 0 },
 634         { "lazystatfs",         ll_rd_lazystatfs, ll_wr_lazystatfs, 0 },
 635         { 0 }
 636 };
 637
 638 #define MAX_STRING_SIZE 128
 639
 640 struct llite_file_opcode {
 641         __u32       opcode;
 642         __u32       type;
 643         const char *opname;
 644 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 645         /* file operation */
 646         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 647         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 648         { LPROC_LL_WB_WRITEPAGE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 649                                    "writeback_from_writepage" },
 650         { LPROC_LL_WB_PRESSURE,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 651                                    "writeback_from_pressure" },
 652         { LPROC_LL_WB_OK,          LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 653                                    "writeback_ok_pages" },
 654         { LPROC_LL_WB_FAIL,        LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 655                                    "writeback_failed_pages" },
 656         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 657                                    "read_bytes" },
 658         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 659                                    "write_bytes" },
 660         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 661                                    "brw_read" },
 662         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 663                                    "brw_write" },
 664
 665         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
 666         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 667         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
 668         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
 669         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
 670         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
 671         /* inode operation */
 672         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
 673         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "truncate" },
 674         { LPROC_LL_LOCKLESS_TRUNC, LPROCFS_TYPE_REGS, "lockless_truncate"},
 675         { LPROC_LL_FLOCK,          LPROCFS_TYPE_REGS, "flock" },
 676         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
 677         /* special inode operation */
 678         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
 679         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 680         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 681         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 682         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
 683         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
 684         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
 685         { LPROC_LL_DIRECT_READ,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 686                                    "direct_read" },
 687         { LPROC_LL_DIRECT_WRITE,   LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 688                                    "direct_write" },
 689         { LPROC_LL_LOCKLESS_READ,  LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 690                                    "lockless_read_bytes" },
 691         { LPROC_LL_LOCKLESS_WRITE, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 692                                    "lockless_write_bytes" },
 693
 694 };
 695
 696 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 697 {
 698         if (!sbi->ll_stats)
 699                 return;
 700         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 701                 lprocfs_counter_add(sbi->ll_stats, op, count);
 702         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
 703                  sbi->ll_stats_track_id == current->pid)
 704                 lprocfs_counter_add(sbi->ll_stats, op, count);
 705         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
 706                  sbi->ll_stats_track_id == current->parent->pid)
 707                 lprocfs_counter_add(sbi->ll_stats, op, count);
 708         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 709                  sbi->ll_stats_track_id == cfs_curproc_gid())
 710                 lprocfs_counter_add(sbi->ll_stats, op, count);
 711 }
 712 EXPORT_SYMBOL(ll_stats_ops_tally);
 713
 714 static const char *ra_stat_string[] = {
 715         [RA_STAT_HIT] = "hits",
 716         [RA_STAT_MISS] = "misses",
 717         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 718         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 719         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
 720         [RA_STAT_FAILED_MATCH] = "failed lock match",
 721         [RA_STAT_DISCARDED] = "read but discarded",
 722         [RA_STAT_ZERO_LEN] = "zero length file",
 723         [RA_STAT_ZERO_WINDOW] = "zero size window",
 724         [RA_STAT_EOF] = "read-ahead to EOF",
 725         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 726         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
 727 };
 728
 729
 730 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 731                                 struct super_block *sb, char *osc, char *mdc)
 732 {
 733         struct lprocfs_vars lvars[2];
 734         struct lustre_sb_info *lsi = s2lsi(sb);
 735         struct ll_sb_info *sbi = ll_s2sbi(sb);
 736         struct obd_device *obd;
 737         char name[MAX_STRING_SIZE + 1], *ptr;
 738         int err, id, len, rc;
 739         ENTRY;
 740
 741         memset(lvars, 0, sizeof(lvars));
 742
 743         name[MAX_STRING_SIZE] = '\0';
 744         lvars[0].name = name;
 745
 746         LASSERT(sbi != NULL);
 747         LASSERT(mdc != NULL);
 748         LASSERT(osc != NULL);
 749
 750         /* Get fsname */
 751         len = strlen(lsi->lsi_lmd->lmd_profile);
 752         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
 753         if (ptr && (strcmp(ptr, "-client") == 0))
 754                 len -= 7;
 755
 756         /* Mount info */
 757         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
 758                  lsi->lsi_lmd->lmd_profile, sb);
 759
 760         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 761         if (IS_ERR(sbi->ll_proc_root)) {
 762                 err = PTR_ERR(sbi->ll_proc_root);
 763                 sbi->ll_proc_root = NULL;
 764                 RETURN(err);
 765         }
 766
 767         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
 768                                 &vvp_dump_pgcache_file_ops, sbi);
 769         if (rc)
 770                 CWARN("Error adding the dump_page_cache file\n");
 771
 772         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
 773                                 &ll_rw_extents_stats_fops, sbi);
 774         if (rc)
 775                 CWARN("Error adding the extent_stats file\n");
 776
 777         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
 778                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
 779         if (rc)
 780                 CWARN("Error adding the extents_stats_per_process file\n");
 781
 782         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
 783                                 &ll_rw_offset_stats_fops, sbi);
 784         if (rc)
 785                 CWARN("Error adding the offset_stats file\n");
 786
 787         /* File operations stats */
 788         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
 789                                             LPROCFS_STATS_FLAG_NONE);
 790         if (sbi->ll_stats == NULL)
 791                 GOTO(out, err = -ENOMEM);
 792         /* do counter init */
 793         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 794                 __u32 type = llite_opcode_table[id].type;
 795                 void *ptr = NULL;
 796                 if (type & LPROCFS_TYPE_REGS)
 797                         ptr = "regs";
 798                 else if (type & LPROCFS_TYPE_BYTES)
 799                         ptr = "bytes";
 800                 else if (type & LPROCFS_TYPE_PAGES)
 801                         ptr = "pages";
 802                 lprocfs_counter_init(sbi->ll_stats,
 803                                      llite_opcode_table[id].opcode,
 804                                      (type & LPROCFS_CNTR_AVGMINMAX),
 805                                      llite_opcode_table[id].opname, ptr);
 806         }
 807         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
 808         if (err)
 809                 GOTO(out, err);
 810
 811         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
 812                                                LPROCFS_STATS_FLAG_NONE);
 813         if (sbi->ll_ra_stats == NULL)
 814                 GOTO(out, err = -ENOMEM);
 815
 816         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
 817                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
 818                                      ra_stat_string[id], "pages");
 819         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
 820                                      sbi->ll_ra_stats);
 821         if (err)
 822                 GOTO(out, err);
 823
 824
 825         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
 826         if (err)
 827                 GOTO(out, err);
 828
 829         /* MDC info */
 830         obd = class_name2obd(mdc);
 831
 832         LASSERT(obd != NULL);
 833         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 834         LASSERT(obd->obd_type->typ_name != NULL);
 835
 836         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 837                  obd->obd_type->typ_name);
 838         lvars[0].read_fptr = lprocfs_rd_name;
 839         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 840         if (err)
 841                 GOTO(out, err);
 842
 843         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 844         lvars[0].read_fptr = lprocfs_rd_uuid;
 845         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 846         if (err)
 847                 GOTO(out, err);
 848
 849         /* OSC */
 850         obd = class_name2obd(osc);
 851
 852         LASSERT(obd != NULL);
 853         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 854         LASSERT(obd->obd_type->typ_name != NULL);
 855
 856         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 857                  obd->obd_type->typ_name);
 858         lvars[0].read_fptr = lprocfs_rd_name;
 859         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 860         if (err)
 861                 GOTO(out, err);
 862
 863         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 864         lvars[0].read_fptr = lprocfs_rd_uuid;
 865         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 866 out:
 867         if (err) {
 868                 lprocfs_remove(&sbi->ll_proc_root);
 869                 lprocfs_free_stats(&sbi->ll_ra_stats);
 870                 lprocfs_free_stats(&sbi->ll_stats);
 871         }
 872         RETURN(err);
 873 }
 874
 875 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
 876 {
 877         if (sbi->ll_proc_root) {
 878                 lprocfs_remove(&sbi->ll_proc_root);
 879                 lprocfs_free_stats(&sbi->ll_ra_stats);
 880                 lprocfs_free_stats(&sbi->ll_stats);
 881         }
 882 }
 883 #undef MAX_STRING_SIZE
 884
 885 #define pct(a,b) (b ? a * 100 / b : 0)
 886
 887 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
 888                                    struct seq_file *seq, int which)
 889 {
 890         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 891         unsigned long start, end, r, w;
 892         char *unitp = "KMGTPEZY";
 893         int i, units = 10;
 894         struct per_process_info *pp_info = &io_extents->pp_extents[which];
 895
 896         read_cum = 0;
 897         write_cum = 0;
 898         start = 0;
 899
 900         for(i = 0; i < LL_HIST_MAX; i++) {
 901                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
 902                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
 903         }
 904
 905         for(i = 0; i < LL_HIST_MAX; i++) {
 906                 r = pp_info->pp_r_hist.oh_buckets[i];
 907                 w = pp_info->pp_w_hist.oh_buckets[i];
 908                 read_cum += r;
 909                 write_cum += w;
 910                 end = 1 << (i + LL_HIST_START - units);
 911                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
 912                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
 913                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
 914                            r, pct(r, read_tot), pct(read_cum, read_tot),
 915                            w, pct(w, write_tot), pct(write_cum, write_tot));
 916                 start = end;
 917                 if (start == 1<<10) {
 918                         start = 1;
 919                         units += 10;
 920                         unitp++;
 921                 }
 922                 if (read_cum == read_tot && write_cum == write_tot)
 923                         break;
 924         }
 925 }
 926
 927 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
 928 {
 929         struct timeval now;
 930         struct ll_sb_info *sbi = seq->private;
 931         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
 932         int k;
 933
 934         cfs_gettimeofday(&now);
 935
 936         if (!sbi->ll_rw_stats_on) {
 937                 seq_printf(seq, "disabled\n"
 938                                 "write anything in this file to activate, "
 939                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
 940                 return 0;
 941         }
 942         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
 943                    now.tv_sec, now.tv_usec);
 944         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
 945         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
 946                    "extents", "calls", "%", "cum%",
 947                    "calls", "%", "cum%");
 948         cfs_spin_lock(&sbi->ll_pp_extent_lock);
 949         for(k = 0; k < LL_PROCESS_HIST_MAX; k++) {
 950                 if(io_extents->pp_extents[k].pid != 0) {
 951                         seq_printf(seq, "\nPID: %d\n",
 952                                    io_extents->pp_extents[k].pid);
 953                         ll_display_extents_info(io_extents, seq, k);
 954                 }
 955         }
 956         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
 957         return 0;
 958 }
 959
 960 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
 961                                                 const char *buf, size_t len,
 962                                                 loff_t *off)
 963 {
 964         struct seq_file *seq = file->private_data;
 965         struct ll_sb_info *sbi = seq->private;
 966         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
 967         int i;
 968         int value = 1, rc = 0;
 969
 970         rc = lprocfs_write_helper(buf, len, &value);
 971         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
 972                        strcmp(buf, "Disabled") == 0))
 973                 value = 0;
 974
 975         if (value == 0)
 976                 sbi->ll_rw_stats_on = 0;
 977         else
 978                 sbi->ll_rw_stats_on = 1;
 979
 980         cfs_spin_lock(&sbi->ll_pp_extent_lock);
 981         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
 982                 io_extents->pp_extents[i].pid = 0;
 983                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
 984                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
 985         }
 986         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
 987         return len;
 988 }
 989
 990 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
 991
 992 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
 993 {
 994         struct timeval now;
 995         struct ll_sb_info *sbi = seq->private;
 996         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
 997
 998         cfs_gettimeofday(&now);
 999
1000         if (!sbi->ll_rw_stats_on) {
1001                 seq_printf(seq, "disabled\n"
1002                                 "write anything in this file to activate, "
1003                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1004                 return 0;
1005         }
1006         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1007                    now.tv_sec, now.tv_usec);
1008
1009         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1010         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1011                    "extents", "calls", "%", "cum%",
1012                    "calls", "%", "cum%");
1013         cfs_spin_lock(&sbi->ll_lock);
1014         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1015         cfs_spin_unlock(&sbi->ll_lock);
1016
1017         return 0;
1018 }
1019
1020 static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf,
1021                                         size_t len, loff_t *off)
1022 {
1023         struct seq_file *seq = file->private_data;
1024         struct ll_sb_info *sbi = seq->private;
1025         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1026         int i;
1027         int value = 1, rc = 0;
1028
1029         rc = lprocfs_write_helper(buf, len, &value);
1030         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1031                        strcmp(buf, "Disabled") == 0))
1032                 value = 0;
1033
1034         if (value == 0)
1035                 sbi->ll_rw_stats_on = 0;
1036         else
1037                 sbi->ll_rw_stats_on = 1;
1038         cfs_spin_lock(&sbi->ll_pp_extent_lock);
1039         for(i = 0; i <= LL_PROCESS_HIST_MAX; i++)
1040         {
1041                 io_extents->pp_extents[i].pid = 0;
1042                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1043                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1044         }
1045         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
1046
1047         return len;
1048 }
1049
1050 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1051
1052 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1053                        struct ll_file_data *file, loff_t pos,
1054                        size_t count, int rw)
1055 {
1056         int i, cur = -1;
1057         struct ll_rw_process_info *process;
1058         struct ll_rw_process_info *offset;
1059         int *off_count = &sbi->ll_rw_offset_entry_count;
1060         int *process_count = &sbi->ll_offset_process_count;
1061         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1062
1063         if(!sbi->ll_rw_stats_on)
1064                 return;
1065         process = sbi->ll_rw_process_info;
1066         offset = sbi->ll_rw_offset_info;
1067
1068         cfs_spin_lock(&sbi->ll_pp_extent_lock);
1069         /* Extent statistics */
1070         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1071                 if(io_extents->pp_extents[i].pid == pid) {
1072                         cur = i;
1073                         break;
1074                 }
1075         }
1076
1077         if (cur == -1) {
1078                 /* new process */
1079                 sbi->ll_extent_process_count =
1080                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1081                 cur = sbi->ll_extent_process_count;
1082                 io_extents->pp_extents[cur].pid = pid;
1083                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1084                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1085         }
1086
1087         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1088              (i < (LL_HIST_MAX - 1)); i++);
1089         if (rw == 0) {
1090                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1091                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1092         } else {
1093                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1094                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1095         }
1096         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
1097
1098         cfs_spin_lock(&sbi->ll_process_lock);
1099         /* Offset statistics */
1100         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1101                 if (process[i].rw_pid == pid) {
1102                         if (process[i].rw_last_file != file) {
1103                                 process[i].rw_range_start = pos;
1104                                 process[i].rw_last_file_pos = pos + count;
1105                                 process[i].rw_smallest_extent = count;
1106                                 process[i].rw_largest_extent = count;
1107                                 process[i].rw_offset = 0;
1108                                 process[i].rw_last_file = file;
1109                                 cfs_spin_unlock(&sbi->ll_process_lock);
1110                                 return;
1111                         }
1112                         if (process[i].rw_last_file_pos != pos) {
1113                                 *off_count =
1114                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1115                                 offset[*off_count].rw_op = process[i].rw_op;
1116                                 offset[*off_count].rw_pid = pid;
1117                                 offset[*off_count].rw_range_start =
1118                                         process[i].rw_range_start;
1119                                 offset[*off_count].rw_range_end =
1120                                         process[i].rw_last_file_pos;
1121                                 offset[*off_count].rw_smallest_extent =
1122                                         process[i].rw_smallest_extent;
1123                                 offset[*off_count].rw_largest_extent =
1124                                         process[i].rw_largest_extent;
1125                                 offset[*off_count].rw_offset =
1126                                         process[i].rw_offset;
1127                                 process[i].rw_op = rw;
1128                                 process[i].rw_range_start = pos;
1129                                 process[i].rw_smallest_extent = count;
1130                                 process[i].rw_largest_extent = count;
1131                                 process[i].rw_offset = pos -
1132                                         process[i].rw_last_file_pos;
1133                         }
1134                         if(process[i].rw_smallest_extent > count)
1135                                 process[i].rw_smallest_extent = count;
1136                         if(process[i].rw_largest_extent < count)
1137                                 process[i].rw_largest_extent = count;
1138                         process[i].rw_last_file_pos = pos + count;
1139                         cfs_spin_unlock(&sbi->ll_process_lock);
1140                         return;
1141                 }
1142         }
1143         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1144         process[*process_count].rw_pid = pid;
1145         process[*process_count].rw_op = rw;
1146         process[*process_count].rw_range_start = pos;
1147         process[*process_count].rw_last_file_pos = pos + count;
1148         process[*process_count].rw_smallest_extent = count;
1149         process[*process_count].rw_largest_extent = count;
1150         process[*process_count].rw_offset = 0;
1151         process[*process_count].rw_last_file = file;
1152         cfs_spin_unlock(&sbi->ll_process_lock);
1153 }
1154
1155 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1156 {
1157         struct timeval now;
1158         struct ll_sb_info *sbi = seq->private;
1159         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1160         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1161         int i;
1162
1163         cfs_gettimeofday(&now);
1164
1165         if (!sbi->ll_rw_stats_on) {
1166                 seq_printf(seq, "disabled\n"
1167                                 "write anything in this file to activate, "
1168                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1169                 return 0;
1170         }
1171         cfs_spin_lock(&sbi->ll_process_lock);
1172
1173         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1174                    now.tv_sec, now.tv_usec);
1175         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1176                    "R/W", "PID", "RANGE START", "RANGE END",
1177                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1178         /* We stored the discontiguous offsets here; print them first */
1179         for(i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1180                 if (offset[i].rw_pid != 0)
1181                         seq_printf(seq,"%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1182                                    offset[i].rw_op ? 'W' : 'R',
1183                                    offset[i].rw_pid,
1184                                    offset[i].rw_range_start,
1185                                    offset[i].rw_range_end,
1186                                    (unsigned long)offset[i].rw_smallest_extent,
1187                                    (unsigned long)offset[i].rw_largest_extent,
1188                                    offset[i].rw_offset);
1189         }
1190         /* Then print the current offsets for each process */
1191         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1192                 if (process[i].rw_pid != 0)
1193                         seq_printf(seq,"%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1194                                    process[i].rw_op ? 'W' : 'R',
1195                                    process[i].rw_pid,
1196                                    process[i].rw_range_start,
1197                                    process[i].rw_last_file_pos,
1198                                    (unsigned long)process[i].rw_smallest_extent,
1199                                    (unsigned long)process[i].rw_largest_extent,
1200                                    process[i].rw_offset);
1201         }
1202         cfs_spin_unlock(&sbi->ll_process_lock);
1203
1204         return 0;
1205 }
1206
1207 static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf,
1208                                        size_t len, loff_t *off)
1209 {
1210         struct seq_file *seq = file->private_data;
1211         struct ll_sb_info *sbi = seq->private;
1212         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1213         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1214         int value = 1, rc = 0;
1215
1216         rc = lprocfs_write_helper(buf, len, &value);
1217
1218         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1219                            strcmp(buf, "Disabled") == 0))
1220                 value = 0;
1221
1222         if (value == 0)
1223                 sbi->ll_rw_stats_on = 0;
1224         else
1225                 sbi->ll_rw_stats_on = 1;
1226
1227         cfs_spin_lock(&sbi->ll_process_lock);
1228         sbi->ll_offset_process_count = 0;
1229         sbi->ll_rw_offset_entry_count = 0;
1230         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1231                LL_PROCESS_HIST_MAX);
1232         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1233                LL_OFFSET_HIST_MAX);
1234         cfs_spin_unlock(&sbi->ll_process_lock);
1235
1236         return len;
1237 }
1238
1239 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1240
1241 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
1242 {
1243     lvars->module_vars  = NULL;
1244     lvars->obd_vars     = lprocfs_llite_obd_vars;
1245 }
1246 #endif /* LPROCFS */