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