lustre/llite/lproc_llite.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36 #define DEBUG_SUBSYSTEM S_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         spin_lock(&sbi->ll_lock);
 243         pages_number = sbi->ll_ra_info.ra_max_pages;
 244         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         spin_lock(&sbi->ll_lock);
 269         sbi->ll_ra_info.ra_max_pages = pages_number;
 270         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         spin_lock(&sbi->ll_lock);
 284         pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
 285         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         spin_lock(&sbi->ll_lock);
 312         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 313         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         spin_lock(&sbi->ll_lock);
 327         pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
 328         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         spin_lock(&sbi->ll_lock);
 357         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 358         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         struct cl_client_cache *cache = &sbi->ll_cache;
 369         int shift = 20 - CFS_PAGE_SHIFT;
 370         int max_cached_mb;
 371         int unused_mb;
 372
 373         *eof = 1;
 374         max_cached_mb = cache->ccc_lru_max >> shift;
 375         unused_mb = cfs_atomic_read(&cache->ccc_lru_left) >> shift;
 376         return snprintf(page, count,
 377                         "users: %d\n"
 378                         "max_cached_mb: %d\n"
 379                         "used_mb: %d\n"
 380                         "unused_mb: %d\n"
 381                         "reclaim_count: %u\n",
 382                         cfs_atomic_read(&cache->ccc_users),
 383                         max_cached_mb,
 384                         max_cached_mb - unused_mb,
 385                         unused_mb,
 386                         cache->ccc_lru_shrinkers);
 387 }
 388
 389 static int ll_wr_max_cached_mb(struct file *file, const char *buffer,
 390                                unsigned long count, void *data)
 391 {
 392         struct super_block *sb = data;
 393         struct ll_sb_info *sbi = ll_s2sbi(sb);
 394         struct cl_client_cache *cache = &sbi->ll_cache;
 395         int mult, rc, pages_number;
 396         int diff = 0;
 397         int nrpages = 0;
 398         ENTRY;
 399
 400         mult = 1 << (20 - CFS_PAGE_SHIFT);
 401         buffer = lprocfs_find_named_value(buffer, "max_cached_mb:", &count);
 402         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 403         if (rc)
 404                 RETURN(rc);
 405
 406         if (pages_number < 0 || pages_number > cfs_num_physpages) {
 407                 CERROR("%s: can't set max cache more than %lu MB\n",
 408                        ll_get_fsname(sb, NULL, 0),
 409                        cfs_num_physpages >> (20 - CFS_PAGE_SHIFT));
 410                 RETURN(-ERANGE);
 411         }
 412
 413         if (sbi->ll_dt_exp == NULL)
 414                 RETURN(-ENODEV);
 415
 416         spin_lock(&sbi->ll_lock);
 417         diff = pages_number - cache->ccc_lru_max;
 418         spin_unlock(&sbi->ll_lock);
 419
 420         /* easy - add more LRU slots. */
 421         if (diff >= 0) {
 422                 cfs_atomic_add(diff, &cache->ccc_lru_left);
 423                 GOTO(out, rc = 0);
 424         }
 425
 426         diff = -diff;
 427         while (diff > 0) {
 428                 int tmp;
 429
 430                 /* reduce LRU budget from free slots. */
 431                 do {
 432                         int ov, nv;
 433
 434                         ov = cfs_atomic_read(&cache->ccc_lru_left);
 435                         if (ov == 0)
 436                                 break;
 437
 438                         nv = ov > diff ? ov - diff : 0;
 439                         rc = cfs_atomic_cmpxchg(&cache->ccc_lru_left, ov, nv);
 440                         if (likely(ov == rc)) {
 441                                 diff -= ov - nv;
 442                                 nrpages += ov - nv;
 443                                 break;
 444                         }
 445                 } while (1);
 446
 447                 if (diff <= 0)
 448                         break;
 449
 450                 /* difficult - have to ask OSCs to drop LRU slots. */
 451                 tmp = diff << 1;
 452                 rc = obd_set_info_async(NULL, sbi->ll_dt_exp,
 453                                 sizeof(KEY_CACHE_LRU_SHRINK),
 454                                 KEY_CACHE_LRU_SHRINK,
 455                                 sizeof(tmp), &tmp, NULL);
 456                 if (rc < 0)
 457                         break;
 458         }
 459
 460 out:
 461         if (rc >= 0) {
 462                 spin_lock(&sbi->ll_lock);
 463                 cache->ccc_lru_max = pages_number;
 464                 spin_unlock(&sbi->ll_lock);
 465                 rc = count;
 466         } else {
 467                 cfs_atomic_add(nrpages, &cache->ccc_lru_left);
 468         }
 469         return rc;
 470 }
 471
 472 static int ll_rd_checksum(char *page, char **start, off_t off,
 473                           int count, int *eof, void *data)
 474 {
 475         struct super_block *sb = data;
 476         struct ll_sb_info *sbi = ll_s2sbi(sb);
 477
 478         return snprintf(page, count, "%u\n",
 479                         (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 480 }
 481
 482 static int ll_wr_checksum(struct file *file, const char *buffer,
 483                           unsigned long count, void *data)
 484 {
 485         struct super_block *sb = data;
 486         struct ll_sb_info *sbi = ll_s2sbi(sb);
 487         int val, rc;
 488
 489         if (!sbi->ll_dt_exp)
 490                 /* Not set up yet */
 491                 return -EAGAIN;
 492
 493         rc = lprocfs_write_helper(buffer, count, &val);
 494         if (rc)
 495                 return rc;
 496         if (val)
 497                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 498         else
 499                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 500
 501         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 502                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 503         if (rc)
 504                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 505
 506         return count;
 507 }
 508
 509 static int ll_rd_max_rw_chunk(char *page, char **start, off_t off,
 510                           int count, int *eof, void *data)
 511 {
 512         struct super_block *sb = data;
 513
 514         return snprintf(page, count, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk);
 515 }
 516
 517 static int ll_wr_max_rw_chunk(struct file *file, const char *buffer,
 518                           unsigned long count, void *data)
 519 {
 520         struct super_block *sb = data;
 521         int rc, val;
 522
 523         rc = lprocfs_write_helper(buffer, count, &val);
 524         if (rc)
 525                 return rc;
 526         ll_s2sbi(sb)->ll_max_rw_chunk = val;
 527         return count;
 528 }
 529
 530 static int ll_rd_track_id(char *page, int count, void *data,
 531                           enum stats_track_type type)
 532 {
 533         struct super_block *sb = data;
 534
 535         if (ll_s2sbi(sb)->ll_stats_track_type == type) {
 536                 return snprintf(page, count, "%d\n",
 537                                 ll_s2sbi(sb)->ll_stats_track_id);
 538
 539         } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
 540                 return snprintf(page, count, "0 (all)\n");
 541         } else {
 542                 return snprintf(page, count, "untracked\n");
 543         }
 544 }
 545
 546 static int ll_wr_track_id(const char *buffer, unsigned long count, void *data,
 547                           enum stats_track_type type)
 548 {
 549         struct super_block *sb = data;
 550         int rc, pid;
 551
 552         rc = lprocfs_write_helper(buffer, count, &pid);
 553         if (rc)
 554                 return rc;
 555         ll_s2sbi(sb)->ll_stats_track_id = pid;
 556         if (pid == 0)
 557                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 558         else
 559                 ll_s2sbi(sb)->ll_stats_track_type = type;
 560         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 561         return count;
 562 }
 563
 564 static int ll_rd_track_pid(char *page, char **start, off_t off,
 565                           int count, int *eof, void *data)
 566 {
 567         return (ll_rd_track_id(page, count, data, STATS_TRACK_PID));
 568 }
 569
 570 static int ll_wr_track_pid(struct file *file, const char *buffer,
 571                           unsigned long count, void *data)
 572 {
 573         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PID));
 574 }
 575
 576 static int ll_rd_track_ppid(char *page, char **start, off_t off,
 577                           int count, int *eof, void *data)
 578 {
 579         return (ll_rd_track_id(page, count, data, STATS_TRACK_PPID));
 580 }
 581
 582 static int ll_wr_track_ppid(struct file *file, const char *buffer,
 583                           unsigned long count, void *data)
 584 {
 585         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PPID));
 586 }
 587
 588 static int ll_rd_track_gid(char *page, char **start, off_t off,
 589                           int count, int *eof, void *data)
 590 {
 591         return (ll_rd_track_id(page, count, data, STATS_TRACK_GID));
 592 }
 593
 594 static int ll_wr_track_gid(struct file *file, const char *buffer,
 595                           unsigned long count, void *data)
 596 {
 597         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_GID));
 598 }
 599
 600 static int ll_rd_statahead_max(char *page, char **start, off_t off,
 601                                int count, int *eof, void *data)
 602 {
 603         struct super_block *sb = data;
 604         struct ll_sb_info *sbi = ll_s2sbi(sb);
 605
 606         return snprintf(page, count, "%u\n", sbi->ll_sa_max);
 607 }
 608
 609 static int ll_wr_statahead_max(struct file *file, const char *buffer,
 610                                unsigned long count, void *data)
 611 {
 612         struct super_block *sb = data;
 613         struct ll_sb_info *sbi = ll_s2sbi(sb);
 614         int val, rc;
 615
 616         rc = lprocfs_write_helper(buffer, count, &val);
 617         if (rc)
 618                 return rc;
 619
 620         if (val >= 0 && val <= LL_SA_RPC_MAX)
 621                 sbi->ll_sa_max = val;
 622         else
 623                 CERROR("Bad statahead_max value %d. Valid values are in the "
 624                        "range [0, %d]\n", val, LL_SA_RPC_MAX);
 625
 626         return count;
 627 }
 628
 629 static int ll_rd_statahead_agl(char *page, char **start, off_t off,
 630                                int count, int *eof, void *data)
 631 {
 632         struct super_block *sb = data;
 633         struct ll_sb_info *sbi = ll_s2sbi(sb);
 634
 635         return snprintf(page, count, "%u\n",
 636                         sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
 637 }
 638
 639 static int ll_wr_statahead_agl(struct file *file, const char *buffer,
 640                                unsigned long count, void *data)
 641 {
 642         struct super_block *sb = data;
 643         struct ll_sb_info *sbi = ll_s2sbi(sb);
 644         int val, rc;
 645
 646         rc = lprocfs_write_helper(buffer, count, &val);
 647         if (rc)
 648                 return rc;
 649
 650         if (val)
 651                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 652         else
 653                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
 654
 655         return count;
 656 }
 657
 658 static int ll_rd_statahead_stats(char *page, char **start, off_t off,
 659                                  int count, int *eof, void *data)
 660 {
 661         struct super_block *sb = data;
 662         struct ll_sb_info *sbi = ll_s2sbi(sb);
 663
 664         return snprintf(page, count,
 665                         "statahead total: %u\n"
 666                         "statahead wrong: %u\n"
 667                         "agl total: %u\n",
 668                         atomic_read(&sbi->ll_sa_total),
 669                         atomic_read(&sbi->ll_sa_wrong),
 670                         atomic_read(&sbi->ll_agl_total));
 671 }
 672
 673 static int ll_rd_lazystatfs(char *page, char **start, off_t off,
 674                             int count, int *eof, void *data)
 675 {
 676         struct super_block *sb = data;
 677         struct ll_sb_info *sbi = ll_s2sbi(sb);
 678
 679         return snprintf(page, count, "%u\n",
 680                         (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 681 }
 682
 683 static int ll_wr_lazystatfs(struct file *file, const char *buffer,
 684                             unsigned long count, void *data)
 685 {
 686         struct super_block *sb = data;
 687         struct ll_sb_info *sbi = ll_s2sbi(sb);
 688         int val, rc;
 689
 690         rc = lprocfs_write_helper(buffer, count, &val);
 691         if (rc)
 692                 return rc;
 693
 694         if (val)
 695                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 696         else
 697                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 698
 699         return count;
 700 }
 701
 702 static int ll_rd_maxea_size(char *page, char **start, off_t off,
 703                             int count, int *eof, void *data)
 704 {
 705         struct super_block *sb = data;
 706         struct ll_sb_info *sbi = ll_s2sbi(sb);
 707         unsigned int ealen;
 708         int rc;
 709
 710         rc = ll_get_max_mdsize(sbi, &ealen);
 711         if (rc)
 712                 return rc;
 713
 714         return snprintf(page, count, "%u\n", ealen);
 715 }
 716
 717 static int ll_rd_sbi_flags(char *page, char **start, off_t off,
 718                                 int count, int *eof, void *data)
 719 {
 720         const char *str[] = LL_SBI_FLAGS;
 721         struct super_block *sb = data;
 722         int flags = ll_s2sbi(sb)->ll_flags;
 723         int i = 0;
 724         int rc = 0;
 725
 726         while (flags != 0) {
 727                 if (ARRAY_SIZE(str) <= i) {
 728                         CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
 729                                 "flags please.\n", ll_get_fsname(sb, NULL, 0));
 730                         return -EINVAL;
 731                 }
 732
 733                 if (flags & 0x1)
 734                         rc += snprintf(page + rc, count - rc, "%s ", str[i]);
 735                 flags >>= 1;
 736                 ++i;
 737         }
 738         if (rc > 0)
 739                 rc += snprintf(page + rc, count - rc, "\b\n");
 740         return rc;
 741 }
 742
 743 static int ll_rd_unstable_stats(char *page, char **start, off_t off,
 744                               int count, int *eof, void *data)
 745 {
 746         struct super_block      *sb    = data;
 747         struct ll_sb_info       *sbi   = ll_s2sbi(sb);
 748         struct cl_client_cache  *cache = &sbi->ll_cache;
 749         int pages, mb, rc;
 750
 751         pages = cfs_atomic_read(&cache->ccc_unstable_nr);
 752         mb    = (pages * CFS_PAGE_SIZE) >> 20;
 753
 754         rc = snprintf(page, count, "unstable_pages: %8d\n"
 755                                    "unstable_mb:    %8d\n", pages, mb);
 756
 757         return rc;
 758 }
 759
 760 static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 761         { "uuid",         ll_rd_sb_uuid,          0, 0 },
 762         //{ "mntpt_path",   ll_rd_path,             0, 0 },
 763         { "fstype",       ll_rd_fstype,           0, 0 },
 764         { "site",         ll_rd_site_stats,       0, 0 },
 765         { "blocksize",    ll_rd_blksize,          0, 0 },
 766         { "kbytestotal",  ll_rd_kbytestotal,      0, 0 },
 767         { "kbytesfree",   ll_rd_kbytesfree,       0, 0 },
 768         { "kbytesavail",  ll_rd_kbytesavail,      0, 0 },
 769         { "filestotal",   ll_rd_filestotal,       0, 0 },
 770         { "filesfree",    ll_rd_filesfree,        0, 0 },
 771         { "client_type",  ll_rd_client_type,      0, 0 },
 772         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
 773         { "max_read_ahead_mb", ll_rd_max_readahead_mb,
 774                                ll_wr_max_readahead_mb, 0 },
 775         { "max_read_ahead_per_file_mb", ll_rd_max_readahead_per_file_mb,
 776                                         ll_wr_max_readahead_per_file_mb, 0 },
 777         { "max_read_ahead_whole_mb", ll_rd_max_read_ahead_whole_mb,
 778                                      ll_wr_max_read_ahead_whole_mb, 0 },
 779         { "max_cached_mb",    ll_rd_max_cached_mb, ll_wr_max_cached_mb, 0 },
 780         { "checksum_pages",   ll_rd_checksum, ll_wr_checksum, 0 },
 781         { "max_rw_chunk",     ll_rd_max_rw_chunk, ll_wr_max_rw_chunk, 0 },
 782         { "stats_track_pid",  ll_rd_track_pid, ll_wr_track_pid, 0 },
 783         { "stats_track_ppid", ll_rd_track_ppid, ll_wr_track_ppid, 0 },
 784         { "stats_track_gid",  ll_rd_track_gid, ll_wr_track_gid, 0 },
 785         { "statahead_max",    ll_rd_statahead_max, ll_wr_statahead_max, 0 },
 786         { "statahead_agl",    ll_rd_statahead_agl, ll_wr_statahead_agl, 0 },
 787         { "statahead_stats",  ll_rd_statahead_stats, 0, 0 },
 788         { "lazystatfs",       ll_rd_lazystatfs, ll_wr_lazystatfs, 0 },
 789         { "max_easize",       ll_rd_maxea_size, 0, 0 },
 790         { "sbi_flags",        ll_rd_sbi_flags, 0, 0 },
 791         { "unstable_stats",   ll_rd_unstable_stats, 0, 0},
 792         { 0 }
 793 };
 794
 795 #define MAX_STRING_SIZE 128
 796
 797 struct llite_file_opcode {
 798         __u32       opcode;
 799         __u32       type;
 800         const char *opname;
 801 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 802         /* file operation */
 803         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 804         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 805         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 806                                    "read_bytes" },
 807         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 808                                    "write_bytes" },
 809         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 810                                    "brw_read" },
 811         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 812                                    "brw_write" },
 813         { LPROC_LL_OSC_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 814                                    "osc_read" },
 815         { LPROC_LL_OSC_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 816                                    "osc_write" },
 817         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
 818         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 819         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
 820         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
 821         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
 822         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
 823         { LPROC_LL_READDIR,        LPROCFS_TYPE_REGS, "readdir" },
 824         /* inode operation */
 825         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
 826         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "truncate" },
 827         { LPROC_LL_FLOCK,          LPROCFS_TYPE_REGS, "flock" },
 828         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
 829         /* dir inode operation */
 830         { LPROC_LL_CREATE,         LPROCFS_TYPE_REGS, "create" },
 831         { LPROC_LL_LINK,           LPROCFS_TYPE_REGS, "link" },
 832         { LPROC_LL_UNLINK,         LPROCFS_TYPE_REGS, "unlink" },
 833         { LPROC_LL_SYMLINK,        LPROCFS_TYPE_REGS, "symlink" },
 834         { LPROC_LL_MKDIR,          LPROCFS_TYPE_REGS, "mkdir" },
 835         { LPROC_LL_RMDIR,          LPROCFS_TYPE_REGS, "rmdir" },
 836         { LPROC_LL_MKNOD,          LPROCFS_TYPE_REGS, "mknod" },
 837         { LPROC_LL_RENAME,         LPROCFS_TYPE_REGS, "rename" },
 838         /* special inode operation */
 839         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
 840         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 841         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 842         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 843         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
 844         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
 845         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
 846 };
 847
 848 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 849 {
 850         if (!sbi->ll_stats)
 851                 return;
 852         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 853                 lprocfs_counter_add(sbi->ll_stats, op, count);
 854         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
 855                  sbi->ll_stats_track_id == current->pid)
 856                 lprocfs_counter_add(sbi->ll_stats, op, count);
 857         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
 858                  sbi->ll_stats_track_id == current->parent->pid)
 859                 lprocfs_counter_add(sbi->ll_stats, op, count);
 860         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 861                  sbi->ll_stats_track_id == cfs_curproc_gid())
 862                 lprocfs_counter_add(sbi->ll_stats, op, count);
 863 }
 864 EXPORT_SYMBOL(ll_stats_ops_tally);
 865
 866 static const char *ra_stat_string[] = {
 867         [RA_STAT_HIT] = "hits",
 868         [RA_STAT_MISS] = "misses",
 869         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 870         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 871         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
 872         [RA_STAT_FAILED_MATCH] = "failed lock match",
 873         [RA_STAT_DISCARDED] = "read but discarded",
 874         [RA_STAT_ZERO_LEN] = "zero length file",
 875         [RA_STAT_ZERO_WINDOW] = "zero size window",
 876         [RA_STAT_EOF] = "read-ahead to EOF",
 877         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 878         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
 879 };
 880
 881
 882 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 883                                 struct super_block *sb, char *osc, char *mdc)
 884 {
 885         struct lprocfs_vars lvars[2];
 886         struct lustre_sb_info *lsi = s2lsi(sb);
 887         struct ll_sb_info *sbi = ll_s2sbi(sb);
 888         struct obd_device *obd;
 889         char name[MAX_STRING_SIZE + 1], *ptr;
 890         int err, id, len, rc;
 891         ENTRY;
 892
 893         memset(lvars, 0, sizeof(lvars));
 894
 895         name[MAX_STRING_SIZE] = '\0';
 896         lvars[0].name = name;
 897
 898         LASSERT(sbi != NULL);
 899         LASSERT(mdc != NULL);
 900         LASSERT(osc != NULL);
 901
 902         /* Get fsname */
 903         len = strlen(lsi->lsi_lmd->lmd_profile);
 904         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
 905         if (ptr && (strcmp(ptr, "-client") == 0))
 906                 len -= 7;
 907
 908         /* Mount info */
 909         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
 910                  lsi->lsi_lmd->lmd_profile, sb);
 911
 912         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 913         if (IS_ERR(sbi->ll_proc_root)) {
 914                 err = PTR_ERR(sbi->ll_proc_root);
 915                 sbi->ll_proc_root = NULL;
 916                 RETURN(err);
 917         }
 918
 919         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
 920                                 &vvp_dump_pgcache_file_ops, sbi);
 921         if (rc)
 922                 CWARN("Error adding the dump_page_cache file\n");
 923
 924         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
 925                                 &ll_rw_extents_stats_fops, sbi);
 926         if (rc)
 927                 CWARN("Error adding the extent_stats file\n");
 928
 929         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
 930                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
 931         if (rc)
 932                 CWARN("Error adding the extents_stats_per_process file\n");
 933
 934         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
 935                                 &ll_rw_offset_stats_fops, sbi);
 936         if (rc)
 937                 CWARN("Error adding the offset_stats file\n");
 938
 939         /* File operations stats */
 940         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
 941                                             LPROCFS_STATS_FLAG_NONE);
 942         if (sbi->ll_stats == NULL)
 943                 GOTO(out, err = -ENOMEM);
 944         /* do counter init */
 945         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 946                 __u32 type = llite_opcode_table[id].type;
 947                 void *ptr = NULL;
 948                 if (type & LPROCFS_TYPE_REGS)
 949                         ptr = "regs";
 950                 else if (type & LPROCFS_TYPE_BYTES)
 951                         ptr = "bytes";
 952                 else if (type & LPROCFS_TYPE_PAGES)
 953                         ptr = "pages";
 954                 lprocfs_counter_init(sbi->ll_stats,
 955                                      llite_opcode_table[id].opcode,
 956                                      (type & LPROCFS_CNTR_AVGMINMAX),
 957                                      llite_opcode_table[id].opname, ptr);
 958         }
 959         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
 960         if (err)
 961                 GOTO(out, err);
 962
 963         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
 964                                                LPROCFS_STATS_FLAG_NONE);
 965         if (sbi->ll_ra_stats == NULL)
 966                 GOTO(out, err = -ENOMEM);
 967
 968         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
 969                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
 970                                      ra_stat_string[id], "pages");
 971         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
 972                                      sbi->ll_ra_stats);
 973         if (err)
 974                 GOTO(out, err);
 975
 976
 977         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
 978         if (err)
 979                 GOTO(out, err);
 980
 981         /* MDC info */
 982         obd = class_name2obd(mdc);
 983
 984         LASSERT(obd != NULL);
 985         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 986         LASSERT(obd->obd_type->typ_name != NULL);
 987
 988         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 989                  obd->obd_type->typ_name);
 990         lvars[0].read_fptr = lprocfs_rd_name;
 991         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 992         if (err)
 993                 GOTO(out, err);
 994
 995         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 996         lvars[0].read_fptr = lprocfs_rd_uuid;
 997         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 998         if (err)
 999                 GOTO(out, err);
1000
1001         /* OSC */
1002         obd = class_name2obd(osc);
1003
1004         LASSERT(obd != NULL);
1005         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1006         LASSERT(obd->obd_type->typ_name != NULL);
1007
1008         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
1009                  obd->obd_type->typ_name);
1010         lvars[0].read_fptr = lprocfs_rd_name;
1011         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
1012         if (err)
1013                 GOTO(out, err);
1014
1015         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
1016         lvars[0].read_fptr = lprocfs_rd_uuid;
1017         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
1018 out:
1019         if (err) {
1020                 lprocfs_remove(&sbi->ll_proc_root);
1021                 lprocfs_free_stats(&sbi->ll_ra_stats);
1022                 lprocfs_free_stats(&sbi->ll_stats);
1023         }
1024         RETURN(err);
1025 }
1026
1027 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
1028 {
1029         if (sbi->ll_proc_root) {
1030                 lprocfs_remove(&sbi->ll_proc_root);
1031                 lprocfs_free_stats(&sbi->ll_ra_stats);
1032                 lprocfs_free_stats(&sbi->ll_stats);
1033         }
1034 }
1035 #undef MAX_STRING_SIZE
1036
1037 #define pct(a,b) (b ? a * 100 / b : 0)
1038
1039 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1040                                    struct seq_file *seq, int which)
1041 {
1042         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1043         unsigned long start, end, r, w;
1044         char *unitp = "KMGTPEZY";
1045         int i, units = 10;
1046         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1047
1048         read_cum = 0;
1049         write_cum = 0;
1050         start = 0;
1051
1052         for(i = 0; i < LL_HIST_MAX; i++) {
1053                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1054                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1055         }
1056
1057         for(i = 0; i < LL_HIST_MAX; i++) {
1058                 r = pp_info->pp_r_hist.oh_buckets[i];
1059                 w = pp_info->pp_w_hist.oh_buckets[i];
1060                 read_cum += r;
1061                 write_cum += w;
1062                 end = 1 << (i + LL_HIST_START - units);
1063                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
1064                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
1065                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1066                            r, pct(r, read_tot), pct(read_cum, read_tot),
1067                            w, pct(w, write_tot), pct(write_cum, write_tot));
1068                 start = end;
1069                 if (start == 1<<10) {
1070                         start = 1;
1071                         units += 10;
1072                         unitp++;
1073                 }
1074                 if (read_cum == read_tot && write_cum == write_tot)
1075                         break;
1076         }
1077 }
1078
1079 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1080 {
1081         struct timeval now;
1082         struct ll_sb_info *sbi = seq->private;
1083         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1084         int k;
1085
1086         cfs_gettimeofday(&now);
1087
1088         if (!sbi->ll_rw_stats_on) {
1089                 seq_printf(seq, "disabled\n"
1090                                 "write anything in this file to activate, "
1091                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1092                 return 0;
1093         }
1094         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1095                    now.tv_sec, now.tv_usec);
1096         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1097         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1098                    "extents", "calls", "%", "cum%",
1099                    "calls", "%", "cum%");
1100         spin_lock(&sbi->ll_pp_extent_lock);
1101         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1102                 if (io_extents->pp_extents[k].pid != 0) {
1103                         seq_printf(seq, "\nPID: %d\n",
1104                                    io_extents->pp_extents[k].pid);
1105                         ll_display_extents_info(io_extents, seq, k);
1106                 }
1107         }
1108         spin_unlock(&sbi->ll_pp_extent_lock);
1109         return 0;
1110 }
1111
1112 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1113                                                 const char *buf, size_t len,
1114                                                 loff_t *off)
1115 {
1116         struct seq_file *seq = file->private_data;
1117         struct ll_sb_info *sbi = seq->private;
1118         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1119         int i;
1120         int value = 1, rc = 0;
1121
1122         rc = lprocfs_write_helper(buf, len, &value);
1123         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1124                        strcmp(buf, "Disabled") == 0))
1125                 value = 0;
1126
1127         if (value == 0)
1128                 sbi->ll_rw_stats_on = 0;
1129         else
1130                 sbi->ll_rw_stats_on = 1;
1131
1132         spin_lock(&sbi->ll_pp_extent_lock);
1133         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1134                 io_extents->pp_extents[i].pid = 0;
1135                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1136                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1137         }
1138         spin_unlock(&sbi->ll_pp_extent_lock);
1139         return len;
1140 }
1141
1142 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1143
1144 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1145 {
1146         struct timeval now;
1147         struct ll_sb_info *sbi = seq->private;
1148         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1149
1150         cfs_gettimeofday(&now);
1151
1152         if (!sbi->ll_rw_stats_on) {
1153                 seq_printf(seq, "disabled\n"
1154                                 "write anything in this file to activate, "
1155                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1156                 return 0;
1157         }
1158         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1159                    now.tv_sec, now.tv_usec);
1160
1161         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1162         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1163                    "extents", "calls", "%", "cum%",
1164                    "calls", "%", "cum%");
1165         spin_lock(&sbi->ll_lock);
1166         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1167         spin_unlock(&sbi->ll_lock);
1168
1169         return 0;
1170 }
1171
1172 static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf,
1173                                         size_t len, loff_t *off)
1174 {
1175         struct seq_file *seq = file->private_data;
1176         struct ll_sb_info *sbi = seq->private;
1177         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1178         int i;
1179         int value = 1, rc = 0;
1180
1181         rc = lprocfs_write_helper(buf, len, &value);
1182         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1183                        strcmp(buf, "Disabled") == 0))
1184                 value = 0;
1185
1186         if (value == 0)
1187                 sbi->ll_rw_stats_on = 0;
1188         else
1189                 sbi->ll_rw_stats_on = 1;
1190         spin_lock(&sbi->ll_pp_extent_lock);
1191         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1192                 io_extents->pp_extents[i].pid = 0;
1193                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1194                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1195         }
1196         spin_unlock(&sbi->ll_pp_extent_lock);
1197
1198         return len;
1199 }
1200
1201 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1202
1203 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1204                        struct ll_file_data *file, loff_t pos,
1205                        size_t count, int rw)
1206 {
1207         int i, cur = -1;
1208         struct ll_rw_process_info *process;
1209         struct ll_rw_process_info *offset;
1210         int *off_count = &sbi->ll_rw_offset_entry_count;
1211         int *process_count = &sbi->ll_offset_process_count;
1212         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1213
1214         if(!sbi->ll_rw_stats_on)
1215                 return;
1216         process = sbi->ll_rw_process_info;
1217         offset = sbi->ll_rw_offset_info;
1218
1219         spin_lock(&sbi->ll_pp_extent_lock);
1220         /* Extent statistics */
1221         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1222                 if(io_extents->pp_extents[i].pid == pid) {
1223                         cur = i;
1224                         break;
1225                 }
1226         }
1227
1228         if (cur == -1) {
1229                 /* new process */
1230                 sbi->ll_extent_process_count =
1231                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1232                 cur = sbi->ll_extent_process_count;
1233                 io_extents->pp_extents[cur].pid = pid;
1234                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1235                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1236         }
1237
1238         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1239              (i < (LL_HIST_MAX - 1)); i++);
1240         if (rw == 0) {
1241                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1242                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1243         } else {
1244                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1245                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1246         }
1247         spin_unlock(&sbi->ll_pp_extent_lock);
1248
1249         spin_lock(&sbi->ll_process_lock);
1250         /* Offset statistics */
1251         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1252                 if (process[i].rw_pid == pid) {
1253                         if (process[i].rw_last_file != file) {
1254                                 process[i].rw_range_start = pos;
1255                                 process[i].rw_last_file_pos = pos + count;
1256                                 process[i].rw_smallest_extent = count;
1257                                 process[i].rw_largest_extent = count;
1258                                 process[i].rw_offset = 0;
1259                                 process[i].rw_last_file = file;
1260                                 spin_unlock(&sbi->ll_process_lock);
1261                                 return;
1262                         }
1263                         if (process[i].rw_last_file_pos != pos) {
1264                                 *off_count =
1265                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1266                                 offset[*off_count].rw_op = process[i].rw_op;
1267                                 offset[*off_count].rw_pid = pid;
1268                                 offset[*off_count].rw_range_start =
1269                                         process[i].rw_range_start;
1270                                 offset[*off_count].rw_range_end =
1271                                         process[i].rw_last_file_pos;
1272                                 offset[*off_count].rw_smallest_extent =
1273                                         process[i].rw_smallest_extent;
1274                                 offset[*off_count].rw_largest_extent =
1275                                         process[i].rw_largest_extent;
1276                                 offset[*off_count].rw_offset =
1277                                         process[i].rw_offset;
1278                                 process[i].rw_op = rw;
1279                                 process[i].rw_range_start = pos;
1280                                 process[i].rw_smallest_extent = count;
1281                                 process[i].rw_largest_extent = count;
1282                                 process[i].rw_offset = pos -
1283                                         process[i].rw_last_file_pos;
1284                         }
1285                         if(process[i].rw_smallest_extent > count)
1286                                 process[i].rw_smallest_extent = count;
1287                         if(process[i].rw_largest_extent < count)
1288                                 process[i].rw_largest_extent = count;
1289                         process[i].rw_last_file_pos = pos + count;
1290                         spin_unlock(&sbi->ll_process_lock);
1291                         return;
1292                 }
1293         }
1294         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1295         process[*process_count].rw_pid = pid;
1296         process[*process_count].rw_op = rw;
1297         process[*process_count].rw_range_start = pos;
1298         process[*process_count].rw_last_file_pos = pos + count;
1299         process[*process_count].rw_smallest_extent = count;
1300         process[*process_count].rw_largest_extent = count;
1301         process[*process_count].rw_offset = 0;
1302         process[*process_count].rw_last_file = file;
1303         spin_unlock(&sbi->ll_process_lock);
1304 }
1305
1306 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1307 {
1308         struct timeval now;
1309         struct ll_sb_info *sbi = seq->private;
1310         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1311         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1312         int i;
1313
1314         cfs_gettimeofday(&now);
1315
1316         if (!sbi->ll_rw_stats_on) {
1317                 seq_printf(seq, "disabled\n"
1318                                 "write anything in this file to activate, "
1319                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1320                 return 0;
1321         }
1322         spin_lock(&sbi->ll_process_lock);
1323
1324         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1325                    now.tv_sec, now.tv_usec);
1326         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1327                    "R/W", "PID", "RANGE START", "RANGE END",
1328                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1329         /* We stored the discontiguous offsets here; print them first */
1330         for(i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1331                 if (offset[i].rw_pid != 0)
1332                         seq_printf(seq,"%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1333                                    offset[i].rw_op ? 'W' : 'R',
1334                                    offset[i].rw_pid,
1335                                    offset[i].rw_range_start,
1336                                    offset[i].rw_range_end,
1337                                    (unsigned long)offset[i].rw_smallest_extent,
1338                                    (unsigned long)offset[i].rw_largest_extent,
1339                                    offset[i].rw_offset);
1340         }
1341         /* Then print the current offsets for each process */
1342         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1343                 if (process[i].rw_pid != 0)
1344                         seq_printf(seq,"%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1345                                    process[i].rw_op ? 'W' : 'R',
1346                                    process[i].rw_pid,
1347                                    process[i].rw_range_start,
1348                                    process[i].rw_last_file_pos,
1349                                    (unsigned long)process[i].rw_smallest_extent,
1350                                    (unsigned long)process[i].rw_largest_extent,
1351                                    process[i].rw_offset);
1352         }
1353         spin_unlock(&sbi->ll_process_lock);
1354
1355         return 0;
1356 }
1357
1358 static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf,
1359                                        size_t len, loff_t *off)
1360 {
1361         struct seq_file *seq = file->private_data;
1362         struct ll_sb_info *sbi = seq->private;
1363         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1364         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1365         int value = 1, rc = 0;
1366
1367         rc = lprocfs_write_helper(buf, len, &value);
1368
1369         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1370                            strcmp(buf, "Disabled") == 0))
1371                 value = 0;
1372
1373         if (value == 0)
1374                 sbi->ll_rw_stats_on = 0;
1375         else
1376                 sbi->ll_rw_stats_on = 1;
1377
1378         spin_lock(&sbi->ll_process_lock);
1379         sbi->ll_offset_process_count = 0;
1380         sbi->ll_rw_offset_entry_count = 0;
1381         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1382                LL_PROCESS_HIST_MAX);
1383         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1384                LL_OFFSET_HIST_MAX);
1385         spin_unlock(&sbi->ll_process_lock);
1386
1387         return len;
1388 }
1389
1390 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1391
1392 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
1393 {
1394     lvars->module_vars  = NULL;
1395     lvars->obd_vars     = lprocfs_llite_obd_vars;
1396 }
1397 #endif /* LPROCFS */