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) 2012, Whamcloud, Inc.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36 #define DEBUG_SUBSYSTEM S_LLITE
  37
  38 #include <linux/version.h>
  39 #include <lustre_lite.h>
  40 #include <lprocfs_status.h>
  41 #include <linux/seq_file.h>
  42 #include <obd_support.h>
  43
  44 #include "llite_internal.h"
  45
  46 struct proc_dir_entry *proc_lustre_fs_root;
  47
  48 #ifdef LPROCFS
  49 /* /proc/lustre/llite mount point registration */
  50 extern struct file_operations vvp_dump_pgcache_file_ops;
  51 struct file_operations ll_rw_extents_stats_fops;
  52 struct file_operations ll_rw_extents_stats_pp_fops;
  53 struct file_operations ll_rw_offset_stats_fops;
  54
  55 static int ll_rd_blksize(char *page, char **start, off_t off, int count,
  56                          int *eof, void *data)
  57 {
  58         struct super_block *sb = (struct super_block *)data;
  59         struct obd_statfs osfs;
  60         int rc;
  61
  62         LASSERT(sb != NULL);
  63         rc = ll_statfs_internal(sb, &osfs,
  64                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  65                                 OBD_STATFS_NODELAY);
  66         if (!rc) {
  67               *eof = 1;
  68               rc = snprintf(page, count, "%u\n", osfs.os_bsize);
  69         }
  70
  71         return rc;
  72 }
  73
  74 static int ll_rd_kbytestotal(char *page, char **start, off_t off, int count,
  75                              int *eof, void *data)
  76 {
  77         struct super_block *sb = (struct super_block *)data;
  78         struct obd_statfs osfs;
  79         int rc;
  80
  81         LASSERT(sb != NULL);
  82         rc = ll_statfs_internal(sb, &osfs,
  83                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  84                                 OBD_STATFS_NODELAY);
  85         if (!rc) {
  86                 __u32 blk_size = osfs.os_bsize >> 10;
  87                 __u64 result = osfs.os_blocks;
  88
  89                 while (blk_size >>= 1)
  90                         result <<= 1;
  91
  92                 *eof = 1;
  93                 rc = snprintf(page, count, LPU64"\n", result);
  94         }
  95         return rc;
  96
  97 }
  98
  99 static int ll_rd_kbytesfree(char *page, char **start, off_t off, int count,
 100                             int *eof, void *data)
 101 {
 102         struct super_block *sb = (struct super_block *)data;
 103         struct obd_statfs osfs;
 104         int rc;
 105
 106         LASSERT(sb != NULL);
 107         rc = ll_statfs_internal(sb, &osfs,
 108                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 109                                 OBD_STATFS_NODELAY);
 110         if (!rc) {
 111                 __u32 blk_size = osfs.os_bsize >> 10;
 112                 __u64 result = osfs.os_bfree;
 113
 114                 while (blk_size >>= 1)
 115                         result <<= 1;
 116
 117                 *eof = 1;
 118                 rc = snprintf(page, count, LPU64"\n", result);
 119         }
 120         return rc;
 121 }
 122
 123 static int ll_rd_kbytesavail(char *page, char **start, off_t off, int count,
 124                              int *eof, void *data)
 125 {
 126         struct super_block *sb = (struct super_block *)data;
 127         struct obd_statfs osfs;
 128         int rc;
 129
 130         LASSERT(sb != NULL);
 131         rc = ll_statfs_internal(sb, &osfs,
 132                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 133                                 OBD_STATFS_NODELAY);
 134         if (!rc) {
 135                 __u32 blk_size = osfs.os_bsize >> 10;
 136                 __u64 result = osfs.os_bavail;
 137
 138                 while (blk_size >>= 1)
 139                         result <<= 1;
 140
 141                 *eof = 1;
 142                 rc = snprintf(page, count, LPU64"\n", result);
 143         }
 144         return rc;
 145 }
 146
 147 static int ll_rd_filestotal(char *page, char **start, off_t off, int count,
 148                             int *eof, void *data)
 149 {
 150         struct super_block *sb = (struct super_block *)data;
 151         struct obd_statfs osfs;
 152         int rc;
 153
 154         LASSERT(sb != NULL);
 155         rc = ll_statfs_internal(sb, &osfs,
 156                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 157                                 OBD_STATFS_NODELAY);
 158         if (!rc) {
 159                  *eof = 1;
 160                  rc = snprintf(page, count, LPU64"\n", osfs.os_files);
 161         }
 162         return rc;
 163 }
 164
 165 static int ll_rd_filesfree(char *page, char **start, off_t off, int count,
 166                            int *eof, void *data)
 167 {
 168         struct super_block *sb = (struct super_block *)data;
 169         struct obd_statfs osfs;
 170         int rc;
 171
 172         LASSERT(sb != NULL);
 173         rc = ll_statfs_internal(sb, &osfs,
 174                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 175                                 OBD_STATFS_NODELAY);
 176         if (!rc) {
 177                  *eof = 1;
 178                  rc = snprintf(page, count, LPU64"\n", osfs.os_ffree);
 179         }
 180         return rc;
 181
 182 }
 183
 184 static int ll_rd_client_type(char *page, char **start, off_t off, int count,
 185                             int *eof, void *data)
 186 {
 187         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)data);
 188         int rc;
 189
 190         LASSERT(sbi != NULL);
 191
 192         *eof = 1;
 193         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 194                 rc = snprintf(page, count, "remote client\n");
 195         else
 196                 rc = snprintf(page, count, "local client\n");
 197
 198         return rc;
 199 }
 200
 201 static int ll_rd_fstype(char *page, char **start, off_t off, int count,
 202                         int *eof, void *data)
 203 {
 204         struct super_block *sb = (struct super_block*)data;
 205
 206         LASSERT(sb != NULL);
 207         *eof = 1;
 208         return snprintf(page, count, "%s\n", sb->s_type->name);
 209 }
 210
 211 static int ll_rd_sb_uuid(char *page, char **start, off_t off, int count,
 212                          int *eof, void *data)
 213 {
 214         struct super_block *sb = (struct super_block *)data;
 215
 216         LASSERT(sb != NULL);
 217         *eof = 1;
 218         return snprintf(page, count, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
 219 }
 220
 221 static int ll_rd_site_stats(char *page, char **start, off_t off,
 222                             int count, int *eof, void *data)
 223 {
 224         struct super_block *sb = data;
 225
 226         /*
 227          * See description of statistical counters in struct cl_site, and
 228          * struct lu_site.
 229          */
 230         return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site),
 231                                    page, count);
 232 }
 233
 234 static int ll_rd_max_readahead_mb(char *page, char **start, off_t off,
 235                                    int count, int *eof, void *data)
 236 {
 237         struct super_block *sb = data;
 238         struct ll_sb_info *sbi = ll_s2sbi(sb);
 239         long pages_number;
 240         int mult;
 241
 242         cfs_spin_lock(&sbi->ll_lock);
 243         pages_number = sbi->ll_ra_info.ra_max_pages;
 244         cfs_spin_unlock(&sbi->ll_lock);
 245
 246         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 247         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 248 }
 249
 250 static int ll_wr_max_readahead_mb(struct file *file, const char *buffer,
 251                                   unsigned long count, void *data)
 252 {
 253         struct super_block *sb = data;
 254         struct ll_sb_info *sbi = ll_s2sbi(sb);
 255         int mult, rc, pages_number;
 256
 257         mult = 1 << (20 - CFS_PAGE_SHIFT);
 258         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 259         if (rc)
 260                 return rc;
 261
 262         if (pages_number < 0 || pages_number > cfs_num_physpages / 2) {
 263                 CERROR("can't set file readahead more than %lu MB\n",
 264                        cfs_num_physpages >> (20 - CFS_PAGE_SHIFT + 1)); /*1/2 of RAM*/
 265                 return -ERANGE;
 266         }
 267
 268         cfs_spin_lock(&sbi->ll_lock);
 269         sbi->ll_ra_info.ra_max_pages = pages_number;
 270         cfs_spin_unlock(&sbi->ll_lock);
 271
 272         return count;
 273 }
 274
 275 static int ll_rd_max_readahead_per_file_mb(char *page, char **start, off_t off,
 276                                            int count, int *eof, void *data)
 277 {
 278         struct super_block *sb = data;
 279         struct ll_sb_info *sbi = ll_s2sbi(sb);
 280         long pages_number;
 281         int mult;
 282
 283         cfs_spin_lock(&sbi->ll_lock);
 284         pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
 285         cfs_spin_unlock(&sbi->ll_lock);
 286
 287         mult = 1 << (20 - CFS_PAGE_SHIFT);
 288         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 289 }
 290
 291 static int ll_wr_max_readahead_per_file_mb(struct file *file, const char *buffer,
 292                                           unsigned long count, void *data)
 293 {
 294         struct super_block *sb = data;
 295         struct ll_sb_info *sbi = ll_s2sbi(sb);
 296         int mult, rc, pages_number;
 297
 298         mult = 1 << (20 - CFS_PAGE_SHIFT);
 299         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 300         if (rc)
 301                 return rc;
 302
 303         if (pages_number < 0 ||
 304                 pages_number > sbi->ll_ra_info.ra_max_pages) {
 305                 CERROR("can't set file readahead more than"
 306                        "max_read_ahead_mb %lu MB\n",
 307                        sbi->ll_ra_info.ra_max_pages);
 308                 return -ERANGE;
 309         }
 310
 311         cfs_spin_lock(&sbi->ll_lock);
 312         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 313         cfs_spin_unlock(&sbi->ll_lock);
 314
 315         return count;
 316 }
 317
 318 static int ll_rd_max_read_ahead_whole_mb(char *page, char **start, off_t off,
 319                                          int count, int *eof, void *data)
 320 {
 321         struct super_block *sb = data;
 322         struct ll_sb_info *sbi = ll_s2sbi(sb);
 323         long pages_number;
 324         int mult;
 325
 326         cfs_spin_lock(&sbi->ll_lock);
 327         pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
 328         cfs_spin_unlock(&sbi->ll_lock);
 329
 330         mult = 1 << (20 - CFS_PAGE_SHIFT);
 331         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 332 }
 333
 334 static int ll_wr_max_read_ahead_whole_mb(struct file *file, const char *buffer,
 335                                          unsigned long count, void *data)
 336 {
 337         struct super_block *sb = data;
 338         struct ll_sb_info *sbi = ll_s2sbi(sb);
 339         int mult, rc, pages_number;
 340
 341         mult = 1 << (20 - CFS_PAGE_SHIFT);
 342         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 343         if (rc)
 344                 return rc;
 345
 346         /* Cap this at the current max readahead window size, the readahead
 347          * algorithm does this anyway so it's pointless to set it larger. */
 348         if (pages_number < 0 ||
 349             pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
 350                 CERROR("can't set max_read_ahead_whole_mb more than "
 351                        "max_read_ahead_per_file_mb: %lu\n",
 352                         sbi->ll_ra_info.ra_max_pages_per_file >> (20 - CFS_PAGE_SHIFT));
 353                 return -ERANGE;
 354         }
 355
 356         cfs_spin_lock(&sbi->ll_lock);
 357         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 358         cfs_spin_unlock(&sbi->ll_lock);
 359
 360         return count;
 361 }
 362
 363 static int ll_rd_max_cached_mb(char *page, char **start, off_t off,
 364                                int count, int *eof, void *data)
 365 {
 366         struct super_block     *sb    = data;
 367         struct ll_sb_info      *sbi   = ll_s2sbi(sb);
 368         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         cfs_spin_lock(&sbi->ll_lock);
 417         diff = pages_number - cache->ccc_lru_max;
 418         cfs_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                 cfs_spin_lock(&sbi->ll_lock);
 463                 cache->ccc_lru_max = pages_number;
 464                 cfs_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 struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 718         { "uuid",         ll_rd_sb_uuid,          0, 0 },
 719         //{ "mntpt_path",   ll_rd_path,             0, 0 },
 720         { "fstype",       ll_rd_fstype,           0, 0 },
 721         { "site",         ll_rd_site_stats,       0, 0 },
 722         { "blocksize",    ll_rd_blksize,          0, 0 },
 723         { "kbytestotal",  ll_rd_kbytestotal,      0, 0 },
 724         { "kbytesfree",   ll_rd_kbytesfree,       0, 0 },
 725         { "kbytesavail",  ll_rd_kbytesavail,      0, 0 },
 726         { "filestotal",   ll_rd_filestotal,       0, 0 },
 727         { "filesfree",    ll_rd_filesfree,        0, 0 },
 728         { "client_type",  ll_rd_client_type,      0, 0 },
 729         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
 730         { "max_read_ahead_mb", ll_rd_max_readahead_mb,
 731                                ll_wr_max_readahead_mb, 0 },
 732         { "max_read_ahead_per_file_mb", ll_rd_max_readahead_per_file_mb,
 733                                         ll_wr_max_readahead_per_file_mb, 0 },
 734         { "max_read_ahead_whole_mb", ll_rd_max_read_ahead_whole_mb,
 735                                      ll_wr_max_read_ahead_whole_mb, 0 },
 736         { "max_cached_mb",    ll_rd_max_cached_mb, ll_wr_max_cached_mb, 0 },
 737         { "checksum_pages",   ll_rd_checksum, ll_wr_checksum, 0 },
 738         { "max_rw_chunk",     ll_rd_max_rw_chunk, ll_wr_max_rw_chunk, 0 },
 739         { "stats_track_pid",  ll_rd_track_pid, ll_wr_track_pid, 0 },
 740         { "stats_track_ppid", ll_rd_track_ppid, ll_wr_track_ppid, 0 },
 741         { "stats_track_gid",  ll_rd_track_gid, ll_wr_track_gid, 0 },
 742         { "statahead_max",    ll_rd_statahead_max, ll_wr_statahead_max, 0 },
 743         { "statahead_agl",    ll_rd_statahead_agl, ll_wr_statahead_agl, 0 },
 744         { "statahead_stats",  ll_rd_statahead_stats, 0, 0 },
 745         { "lazystatfs",       ll_rd_lazystatfs, ll_wr_lazystatfs, 0 },
 746         { "max_easize",       ll_rd_maxea_size, 0, 0 },
 747         { 0 }
 748 };
 749
 750 #define MAX_STRING_SIZE 128
 751
 752 struct llite_file_opcode {
 753         __u32       opcode;
 754         __u32       type;
 755         const char *opname;
 756 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 757         /* file operation */
 758         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 759         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 760         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 761                                    "read_bytes" },
 762         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 763                                    "write_bytes" },
 764         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 765                                    "brw_read" },
 766         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 767                                    "brw_write" },
 768         { LPROC_LL_OSC_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 769                                    "osc_read" },
 770         { LPROC_LL_OSC_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 771                                    "osc_write" },
 772         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
 773         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 774         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
 775         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
 776         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
 777         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
 778         { LPROC_LL_READDIR,        LPROCFS_TYPE_REGS, "readdir" },
 779         /* inode operation */
 780         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
 781         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "truncate" },
 782         { LPROC_LL_FLOCK,          LPROCFS_TYPE_REGS, "flock" },
 783         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
 784         /* dir inode operation */
 785         { LPROC_LL_CREATE,         LPROCFS_TYPE_REGS, "create" },
 786         { LPROC_LL_LINK,           LPROCFS_TYPE_REGS, "link" },
 787         { LPROC_LL_UNLINK,         LPROCFS_TYPE_REGS, "unlink" },
 788         { LPROC_LL_SYMLINK,        LPROCFS_TYPE_REGS, "symlink" },
 789         { LPROC_LL_MKDIR,          LPROCFS_TYPE_REGS, "mkdir" },
 790         { LPROC_LL_RMDIR,          LPROCFS_TYPE_REGS, "rmdir" },
 791         { LPROC_LL_MKNOD,          LPROCFS_TYPE_REGS, "mknod" },
 792         { LPROC_LL_RENAME,         LPROCFS_TYPE_REGS, "rename" },
 793         /* special inode operation */
 794         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
 795         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 796         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 797         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 798         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
 799         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
 800         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
 801 };
 802
 803 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 804 {
 805         if (!sbi->ll_stats)
 806                 return;
 807         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 808                 lprocfs_counter_add(sbi->ll_stats, op, count);
 809         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
 810                  sbi->ll_stats_track_id == current->pid)
 811                 lprocfs_counter_add(sbi->ll_stats, op, count);
 812         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
 813                  sbi->ll_stats_track_id == current->parent->pid)
 814                 lprocfs_counter_add(sbi->ll_stats, op, count);
 815         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 816                  sbi->ll_stats_track_id == cfs_curproc_gid())
 817                 lprocfs_counter_add(sbi->ll_stats, op, count);
 818 }
 819 EXPORT_SYMBOL(ll_stats_ops_tally);
 820
 821 static const char *ra_stat_string[] = {
 822         [RA_STAT_HIT] = "hits",
 823         [RA_STAT_MISS] = "misses",
 824         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 825         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 826         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
 827         [RA_STAT_FAILED_MATCH] = "failed lock match",
 828         [RA_STAT_DISCARDED] = "read but discarded",
 829         [RA_STAT_ZERO_LEN] = "zero length file",
 830         [RA_STAT_ZERO_WINDOW] = "zero size window",
 831         [RA_STAT_EOF] = "read-ahead to EOF",
 832         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 833         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
 834 };
 835
 836
 837 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 838                                 struct super_block *sb, char *osc, char *mdc)
 839 {
 840         struct lprocfs_vars lvars[2];
 841         struct lustre_sb_info *lsi = s2lsi(sb);
 842         struct ll_sb_info *sbi = ll_s2sbi(sb);
 843         struct obd_device *obd;
 844         char name[MAX_STRING_SIZE + 1], *ptr;
 845         int err, id, len, rc;
 846         ENTRY;
 847
 848         memset(lvars, 0, sizeof(lvars));
 849
 850         name[MAX_STRING_SIZE] = '\0';
 851         lvars[0].name = name;
 852
 853         LASSERT(sbi != NULL);
 854         LASSERT(mdc != NULL);
 855         LASSERT(osc != NULL);
 856
 857         /* Get fsname */
 858         len = strlen(lsi->lsi_lmd->lmd_profile);
 859         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
 860         if (ptr && (strcmp(ptr, "-client") == 0))
 861                 len -= 7;
 862
 863         /* Mount info */
 864         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
 865                  lsi->lsi_lmd->lmd_profile, sb);
 866
 867         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 868         if (IS_ERR(sbi->ll_proc_root)) {
 869                 err = PTR_ERR(sbi->ll_proc_root);
 870                 sbi->ll_proc_root = NULL;
 871                 RETURN(err);
 872         }
 873
 874         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
 875                                 &vvp_dump_pgcache_file_ops, sbi);
 876         if (rc)
 877                 CWARN("Error adding the dump_page_cache file\n");
 878
 879         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
 880                                 &ll_rw_extents_stats_fops, sbi);
 881         if (rc)
 882                 CWARN("Error adding the extent_stats file\n");
 883
 884         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
 885                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
 886         if (rc)
 887                 CWARN("Error adding the extents_stats_per_process file\n");
 888
 889         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
 890                                 &ll_rw_offset_stats_fops, sbi);
 891         if (rc)
 892                 CWARN("Error adding the offset_stats file\n");
 893
 894         /* File operations stats */
 895         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
 896                                             LPROCFS_STATS_FLAG_NONE);
 897         if (sbi->ll_stats == NULL)
 898                 GOTO(out, err = -ENOMEM);
 899         /* do counter init */
 900         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 901                 __u32 type = llite_opcode_table[id].type;
 902                 void *ptr = NULL;
 903                 if (type & LPROCFS_TYPE_REGS)
 904                         ptr = "regs";
 905                 else if (type & LPROCFS_TYPE_BYTES)
 906                         ptr = "bytes";
 907                 else if (type & LPROCFS_TYPE_PAGES)
 908                         ptr = "pages";
 909                 lprocfs_counter_init(sbi->ll_stats,
 910                                      llite_opcode_table[id].opcode,
 911                                      (type & LPROCFS_CNTR_AVGMINMAX),
 912                                      llite_opcode_table[id].opname, ptr);
 913         }
 914         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
 915         if (err)
 916                 GOTO(out, err);
 917
 918         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
 919                                                LPROCFS_STATS_FLAG_NONE);
 920         if (sbi->ll_ra_stats == NULL)
 921                 GOTO(out, err = -ENOMEM);
 922
 923         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
 924                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
 925                                      ra_stat_string[id], "pages");
 926         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
 927                                      sbi->ll_ra_stats);
 928         if (err)
 929                 GOTO(out, err);
 930
 931
 932         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
 933         if (err)
 934                 GOTO(out, err);
 935
 936         /* MDC info */
 937         obd = class_name2obd(mdc);
 938
 939         LASSERT(obd != NULL);
 940         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 941         LASSERT(obd->obd_type->typ_name != NULL);
 942
 943         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 944                  obd->obd_type->typ_name);
 945         lvars[0].read_fptr = lprocfs_rd_name;
 946         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 947         if (err)
 948                 GOTO(out, err);
 949
 950         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 951         lvars[0].read_fptr = lprocfs_rd_uuid;
 952         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 953         if (err)
 954                 GOTO(out, err);
 955
 956         /* OSC */
 957         obd = class_name2obd(osc);
 958
 959         LASSERT(obd != NULL);
 960         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 961         LASSERT(obd->obd_type->typ_name != NULL);
 962
 963         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 964                  obd->obd_type->typ_name);
 965         lvars[0].read_fptr = lprocfs_rd_name;
 966         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 967         if (err)
 968                 GOTO(out, err);
 969
 970         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 971         lvars[0].read_fptr = lprocfs_rd_uuid;
 972         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 973 out:
 974         if (err) {
 975                 lprocfs_remove(&sbi->ll_proc_root);
 976                 lprocfs_free_stats(&sbi->ll_ra_stats);
 977                 lprocfs_free_stats(&sbi->ll_stats);
 978         }
 979         RETURN(err);
 980 }
 981
 982 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
 983 {
 984         if (sbi->ll_proc_root) {
 985                 lprocfs_remove(&sbi->ll_proc_root);
 986                 lprocfs_free_stats(&sbi->ll_ra_stats);
 987                 lprocfs_free_stats(&sbi->ll_stats);
 988         }
 989 }
 990 #undef MAX_STRING_SIZE
 991
 992 #define pct(a,b) (b ? a * 100 / b : 0)
 993
 994 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
 995                                    struct seq_file *seq, int which)
 996 {
 997         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
 998         unsigned long start, end, r, w;
 999         char *unitp = "KMGTPEZY";
1000         int i, units = 10;
1001         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1002
1003         read_cum = 0;
1004         write_cum = 0;
1005         start = 0;
1006
1007         for(i = 0; i < LL_HIST_MAX; i++) {
1008                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1009                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1010         }
1011
1012         for(i = 0; i < LL_HIST_MAX; i++) {
1013                 r = pp_info->pp_r_hist.oh_buckets[i];
1014                 w = pp_info->pp_w_hist.oh_buckets[i];
1015                 read_cum += r;
1016                 write_cum += w;
1017                 end = 1 << (i + LL_HIST_START - units);
1018                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
1019                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
1020                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1021                            r, pct(r, read_tot), pct(read_cum, read_tot),
1022                            w, pct(w, write_tot), pct(write_cum, write_tot));
1023                 start = end;
1024                 if (start == 1<<10) {
1025                         start = 1;
1026                         units += 10;
1027                         unitp++;
1028                 }
1029                 if (read_cum == read_tot && write_cum == write_tot)
1030                         break;
1031         }
1032 }
1033
1034 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1035 {
1036         struct timeval now;
1037         struct ll_sb_info *sbi = seq->private;
1038         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1039         int k;
1040
1041         cfs_gettimeofday(&now);
1042
1043         if (!sbi->ll_rw_stats_on) {
1044                 seq_printf(seq, "disabled\n"
1045                                 "write anything in this file to activate, "
1046                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1047                 return 0;
1048         }
1049         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1050                    now.tv_sec, now.tv_usec);
1051         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1052         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1053                    "extents", "calls", "%", "cum%",
1054                    "calls", "%", "cum%");
1055         cfs_spin_lock(&sbi->ll_pp_extent_lock);
1056         for(k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1057                 if(io_extents->pp_extents[k].pid != 0) {
1058                         seq_printf(seq, "\nPID: %d\n",
1059                                    io_extents->pp_extents[k].pid);
1060                         ll_display_extents_info(io_extents, seq, k);
1061                 }
1062         }
1063         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
1064         return 0;
1065 }
1066
1067 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1068                                                 const char *buf, size_t len,
1069                                                 loff_t *off)
1070 {
1071         struct seq_file *seq = file->private_data;
1072         struct ll_sb_info *sbi = seq->private;
1073         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1074         int i;
1075         int value = 1, rc = 0;
1076
1077         rc = lprocfs_write_helper(buf, len, &value);
1078         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1079                        strcmp(buf, "Disabled") == 0))
1080                 value = 0;
1081
1082         if (value == 0)
1083                 sbi->ll_rw_stats_on = 0;
1084         else
1085                 sbi->ll_rw_stats_on = 1;
1086
1087         cfs_spin_lock(&sbi->ll_pp_extent_lock);
1088         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1089                 io_extents->pp_extents[i].pid = 0;
1090                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1091                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1092         }
1093         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
1094         return len;
1095 }
1096
1097 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1098
1099 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1100 {
1101         struct timeval now;
1102         struct ll_sb_info *sbi = seq->private;
1103         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1104
1105         cfs_gettimeofday(&now);
1106
1107         if (!sbi->ll_rw_stats_on) {
1108                 seq_printf(seq, "disabled\n"
1109                                 "write anything in this file to activate, "
1110                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1111                 return 0;
1112         }
1113         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1114                    now.tv_sec, now.tv_usec);
1115
1116         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1117         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1118                    "extents", "calls", "%", "cum%",
1119                    "calls", "%", "cum%");
1120         cfs_spin_lock(&sbi->ll_lock);
1121         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1122         cfs_spin_unlock(&sbi->ll_lock);
1123
1124         return 0;
1125 }
1126
1127 static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf,
1128                                         size_t len, loff_t *off)
1129 {
1130         struct seq_file *seq = file->private_data;
1131         struct ll_sb_info *sbi = seq->private;
1132         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1133         int i;
1134         int value = 1, rc = 0;
1135
1136         rc = lprocfs_write_helper(buf, len, &value);
1137         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1138                        strcmp(buf, "Disabled") == 0))
1139                 value = 0;
1140
1141         if (value == 0)
1142                 sbi->ll_rw_stats_on = 0;
1143         else
1144                 sbi->ll_rw_stats_on = 1;
1145         cfs_spin_lock(&sbi->ll_pp_extent_lock);
1146         for(i = 0; i <= LL_PROCESS_HIST_MAX; i++)
1147         {
1148                 io_extents->pp_extents[i].pid = 0;
1149                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1150                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1151         }
1152         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
1153
1154         return len;
1155 }
1156
1157 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1158
1159 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1160                        struct ll_file_data *file, loff_t pos,
1161                        size_t count, int rw)
1162 {
1163         int i, cur = -1;
1164         struct ll_rw_process_info *process;
1165         struct ll_rw_process_info *offset;
1166         int *off_count = &sbi->ll_rw_offset_entry_count;
1167         int *process_count = &sbi->ll_offset_process_count;
1168         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1169
1170         if(!sbi->ll_rw_stats_on)
1171                 return;
1172         process = sbi->ll_rw_process_info;
1173         offset = sbi->ll_rw_offset_info;
1174
1175         cfs_spin_lock(&sbi->ll_pp_extent_lock);
1176         /* Extent statistics */
1177         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1178                 if(io_extents->pp_extents[i].pid == pid) {
1179                         cur = i;
1180                         break;
1181                 }
1182         }
1183
1184         if (cur == -1) {
1185                 /* new process */
1186                 sbi->ll_extent_process_count =
1187                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1188                 cur = sbi->ll_extent_process_count;
1189                 io_extents->pp_extents[cur].pid = pid;
1190                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1191                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1192         }
1193
1194         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1195              (i < (LL_HIST_MAX - 1)); i++);
1196         if (rw == 0) {
1197                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1198                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1199         } else {
1200                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1201                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1202         }
1203         cfs_spin_unlock(&sbi->ll_pp_extent_lock);
1204
1205         cfs_spin_lock(&sbi->ll_process_lock);
1206         /* Offset statistics */
1207         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1208                 if (process[i].rw_pid == pid) {
1209                         if (process[i].rw_last_file != file) {
1210                                 process[i].rw_range_start = pos;
1211                                 process[i].rw_last_file_pos = pos + count;
1212                                 process[i].rw_smallest_extent = count;
1213                                 process[i].rw_largest_extent = count;
1214                                 process[i].rw_offset = 0;
1215                                 process[i].rw_last_file = file;
1216                                 cfs_spin_unlock(&sbi->ll_process_lock);
1217                                 return;
1218                         }
1219                         if (process[i].rw_last_file_pos != pos) {
1220                                 *off_count =
1221                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1222                                 offset[*off_count].rw_op = process[i].rw_op;
1223                                 offset[*off_count].rw_pid = pid;
1224                                 offset[*off_count].rw_range_start =
1225                                         process[i].rw_range_start;
1226                                 offset[*off_count].rw_range_end =
1227                                         process[i].rw_last_file_pos;
1228                                 offset[*off_count].rw_smallest_extent =
1229                                         process[i].rw_smallest_extent;
1230                                 offset[*off_count].rw_largest_extent =
1231                                         process[i].rw_largest_extent;
1232                                 offset[*off_count].rw_offset =
1233                                         process[i].rw_offset;
1234                                 process[i].rw_op = rw;
1235                                 process[i].rw_range_start = pos;
1236                                 process[i].rw_smallest_extent = count;
1237                                 process[i].rw_largest_extent = count;
1238                                 process[i].rw_offset = pos -
1239                                         process[i].rw_last_file_pos;
1240                         }
1241                         if(process[i].rw_smallest_extent > count)
1242                                 process[i].rw_smallest_extent = count;
1243                         if(process[i].rw_largest_extent < count)
1244                                 process[i].rw_largest_extent = count;
1245                         process[i].rw_last_file_pos = pos + count;
1246                         cfs_spin_unlock(&sbi->ll_process_lock);
1247                         return;
1248                 }
1249         }
1250         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1251         process[*process_count].rw_pid = pid;
1252         process[*process_count].rw_op = rw;
1253         process[*process_count].rw_range_start = pos;
1254         process[*process_count].rw_last_file_pos = pos + count;
1255         process[*process_count].rw_smallest_extent = count;
1256         process[*process_count].rw_largest_extent = count;
1257         process[*process_count].rw_offset = 0;
1258         process[*process_count].rw_last_file = file;
1259         cfs_spin_unlock(&sbi->ll_process_lock);
1260 }
1261
1262 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1263 {
1264         struct timeval now;
1265         struct ll_sb_info *sbi = seq->private;
1266         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1267         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1268         int i;
1269
1270         cfs_gettimeofday(&now);
1271
1272         if (!sbi->ll_rw_stats_on) {
1273                 seq_printf(seq, "disabled\n"
1274                                 "write anything in this file to activate, "
1275                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1276                 return 0;
1277         }
1278         cfs_spin_lock(&sbi->ll_process_lock);
1279
1280         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1281                    now.tv_sec, now.tv_usec);
1282         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1283                    "R/W", "PID", "RANGE START", "RANGE END",
1284                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1285         /* We stored the discontiguous offsets here; print them first */
1286         for(i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1287                 if (offset[i].rw_pid != 0)
1288                         seq_printf(seq,"%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1289                                    offset[i].rw_op ? 'W' : 'R',
1290                                    offset[i].rw_pid,
1291                                    offset[i].rw_range_start,
1292                                    offset[i].rw_range_end,
1293                                    (unsigned long)offset[i].rw_smallest_extent,
1294                                    (unsigned long)offset[i].rw_largest_extent,
1295                                    offset[i].rw_offset);
1296         }
1297         /* Then print the current offsets for each process */
1298         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1299                 if (process[i].rw_pid != 0)
1300                         seq_printf(seq,"%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1301                                    process[i].rw_op ? 'W' : 'R',
1302                                    process[i].rw_pid,
1303                                    process[i].rw_range_start,
1304                                    process[i].rw_last_file_pos,
1305                                    (unsigned long)process[i].rw_smallest_extent,
1306                                    (unsigned long)process[i].rw_largest_extent,
1307                                    process[i].rw_offset);
1308         }
1309         cfs_spin_unlock(&sbi->ll_process_lock);
1310
1311         return 0;
1312 }
1313
1314 static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf,
1315                                        size_t len, loff_t *off)
1316 {
1317         struct seq_file *seq = file->private_data;
1318         struct ll_sb_info *sbi = seq->private;
1319         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1320         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1321         int value = 1, rc = 0;
1322
1323         rc = lprocfs_write_helper(buf, len, &value);
1324
1325         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1326                            strcmp(buf, "Disabled") == 0))
1327                 value = 0;
1328
1329         if (value == 0)
1330                 sbi->ll_rw_stats_on = 0;
1331         else
1332                 sbi->ll_rw_stats_on = 1;
1333
1334         cfs_spin_lock(&sbi->ll_process_lock);
1335         sbi->ll_offset_process_count = 0;
1336         sbi->ll_rw_offset_entry_count = 0;
1337         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1338                LL_PROCESS_HIST_MAX);
1339         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1340                LL_OFFSET_HIST_MAX);
1341         cfs_spin_unlock(&sbi->ll_process_lock);
1342
1343         return len;
1344 }
1345
1346 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1347
1348 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
1349 {
1350     lvars->module_vars  = NULL;
1351     lvars->obd_vars     = lprocfs_llite_obd_vars;
1352 }
1353 #endif /* LPROCFS */