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, 2013, 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 - PAGE_CACHE_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 > num_physpages / 2) {
 263                 /* 1/2 of RAM */
 264                 CERROR("can't set file readahead more than %lu MB\n",
 265                        num_physpages >> (20 - PAGE_CACHE_SHIFT + 1));
 266                 return -ERANGE;
 267         }
 268
 269         spin_lock(&sbi->ll_lock);
 270         sbi->ll_ra_info.ra_max_pages = pages_number;
 271         spin_unlock(&sbi->ll_lock);
 272
 273         return count;
 274 }
 275
 276 static int ll_rd_max_readahead_per_file_mb(char *page, char **start, off_t off,
 277                                            int count, int *eof, void *data)
 278 {
 279         struct super_block *sb = data;
 280         struct ll_sb_info *sbi = ll_s2sbi(sb);
 281         long pages_number;
 282         int mult;
 283
 284         spin_lock(&sbi->ll_lock);
 285         pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
 286         spin_unlock(&sbi->ll_lock);
 287
 288         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 289         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 290 }
 291
 292 static int ll_wr_max_readahead_per_file_mb(struct file *file, const char *buffer,
 293                                           unsigned long count, void *data)
 294 {
 295         struct super_block *sb = data;
 296         struct ll_sb_info *sbi = ll_s2sbi(sb);
 297         int mult, rc, pages_number;
 298
 299         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 300         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 301         if (rc)
 302                 return rc;
 303
 304         if (pages_number < 0 ||
 305                 pages_number > sbi->ll_ra_info.ra_max_pages) {
 306                 CERROR("can't set file readahead more than"
 307                        "max_read_ahead_mb %lu MB\n",
 308                        sbi->ll_ra_info.ra_max_pages);
 309                 return -ERANGE;
 310         }
 311
 312         spin_lock(&sbi->ll_lock);
 313         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 314         spin_unlock(&sbi->ll_lock);
 315
 316         return count;
 317 }
 318
 319 static int ll_rd_max_read_ahead_whole_mb(char *page, char **start, off_t off,
 320                                          int count, int *eof, void *data)
 321 {
 322         struct super_block *sb = data;
 323         struct ll_sb_info *sbi = ll_s2sbi(sb);
 324         long pages_number;
 325         int mult;
 326
 327         spin_lock(&sbi->ll_lock);
 328         pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
 329         spin_unlock(&sbi->ll_lock);
 330
 331         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 332         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 333 }
 334
 335 static int ll_wr_max_read_ahead_whole_mb(struct file *file, const char *buffer,
 336                                          unsigned long count, void *data)
 337 {
 338         struct super_block *sb = data;
 339         struct ll_sb_info *sbi = ll_s2sbi(sb);
 340         int mult, rc, pages_number;
 341
 342         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 343         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 344         if (rc)
 345                 return rc;
 346
 347         /* Cap this at the current max readahead window size, the readahead
 348          * algorithm does this anyway so it's pointless to set it larger. */
 349         if (pages_number < 0 ||
 350             pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
 351                 CERROR("can't set max_read_ahead_whole_mb more than "
 352                        "max_read_ahead_per_file_mb: %lu\n",
 353                         sbi->ll_ra_info.ra_max_pages_per_file >>
 354                         (20 - PAGE_CACHE_SHIFT));
 355                 return -ERANGE;
 356         }
 357
 358         spin_lock(&sbi->ll_lock);
 359         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 360         spin_unlock(&sbi->ll_lock);
 361
 362         return count;
 363 }
 364
 365 static int ll_rd_max_cached_mb(char *page, char **start, off_t off,
 366                                int count, int *eof, void *data)
 367 {
 368         struct super_block     *sb    = data;
 369         struct ll_sb_info      *sbi   = ll_s2sbi(sb);
 370         struct cl_client_cache *cache = &sbi->ll_cache;
 371         int shift = 20 - PAGE_CACHE_SHIFT;
 372         int max_cached_mb;
 373         int unused_mb;
 374
 375         *eof = 1;
 376         max_cached_mb = cache->ccc_lru_max >> shift;
 377         unused_mb = cfs_atomic_read(&cache->ccc_lru_left) >> shift;
 378         return snprintf(page, count,
 379                         "users: %d\n"
 380                         "max_cached_mb: %d\n"
 381                         "used_mb: %d\n"
 382                         "unused_mb: %d\n"
 383                         "reclaim_count: %u\n",
 384                         cfs_atomic_read(&cache->ccc_users),
 385                         max_cached_mb,
 386                         max_cached_mb - unused_mb,
 387                         unused_mb,
 388                         cache->ccc_lru_shrinkers);
 389 }
 390
 391 static int ll_wr_max_cached_mb(struct file *file, const char *buffer,
 392                                unsigned long count, void *data)
 393 {
 394         struct super_block *sb = data;
 395         struct ll_sb_info *sbi = ll_s2sbi(sb);
 396         struct cl_client_cache *cache = &sbi->ll_cache;
 397         int mult, rc, pages_number;
 398         int diff = 0;
 399         int nrpages = 0;
 400         ENTRY;
 401
 402         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 403         buffer = lprocfs_find_named_value(buffer, "max_cached_mb:", &count);
 404         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 405         if (rc)
 406                 RETURN(rc);
 407
 408         if (pages_number < 0 || pages_number > num_physpages) {
 409                 CERROR("%s: can't set max cache more than %lu MB\n",
 410                        ll_get_fsname(sb, NULL, 0),
 411                        num_physpages >> (20 - PAGE_CACHE_SHIFT));
 412                 RETURN(-ERANGE);
 413         }
 414
 415         if (sbi->ll_dt_exp == NULL)
 416                 RETURN(-ENODEV);
 417
 418         spin_lock(&sbi->ll_lock);
 419         diff = pages_number - cache->ccc_lru_max;
 420         spin_unlock(&sbi->ll_lock);
 421
 422         /* easy - add more LRU slots. */
 423         if (diff >= 0) {
 424                 cfs_atomic_add(diff, &cache->ccc_lru_left);
 425                 GOTO(out, rc = 0);
 426         }
 427
 428         diff = -diff;
 429         while (diff > 0) {
 430                 int tmp;
 431
 432                 /* reduce LRU budget from free slots. */
 433                 do {
 434                         int ov, nv;
 435
 436                         ov = cfs_atomic_read(&cache->ccc_lru_left);
 437                         if (ov == 0)
 438                                 break;
 439
 440                         nv = ov > diff ? ov - diff : 0;
 441                         rc = cfs_atomic_cmpxchg(&cache->ccc_lru_left, ov, nv);
 442                         if (likely(ov == rc)) {
 443                                 diff -= ov - nv;
 444                                 nrpages += ov - nv;
 445                                 break;
 446                         }
 447                 } while (1);
 448
 449                 if (diff <= 0)
 450                         break;
 451
 452                 /* difficult - have to ask OSCs to drop LRU slots. */
 453                 tmp = diff << 1;
 454                 rc = obd_set_info_async(NULL, sbi->ll_dt_exp,
 455                                 sizeof(KEY_CACHE_LRU_SHRINK),
 456                                 KEY_CACHE_LRU_SHRINK,
 457                                 sizeof(tmp), &tmp, NULL);
 458                 if (rc < 0)
 459                         break;
 460         }
 461
 462 out:
 463         if (rc >= 0) {
 464                 spin_lock(&sbi->ll_lock);
 465                 cache->ccc_lru_max = pages_number;
 466                 spin_unlock(&sbi->ll_lock);
 467                 rc = count;
 468         } else {
 469                 cfs_atomic_add(nrpages, &cache->ccc_lru_left);
 470         }
 471         return rc;
 472 }
 473
 474 static int ll_rd_checksum(char *page, char **start, off_t off,
 475                           int count, int *eof, void *data)
 476 {
 477         struct super_block *sb = data;
 478         struct ll_sb_info *sbi = ll_s2sbi(sb);
 479
 480         return snprintf(page, count, "%u\n",
 481                         (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 482 }
 483
 484 static int ll_wr_checksum(struct file *file, const char *buffer,
 485                           unsigned long count, void *data)
 486 {
 487         struct super_block *sb = data;
 488         struct ll_sb_info *sbi = ll_s2sbi(sb);
 489         int val, rc;
 490
 491         if (!sbi->ll_dt_exp)
 492                 /* Not set up yet */
 493                 return -EAGAIN;
 494
 495         rc = lprocfs_write_helper(buffer, count, &val);
 496         if (rc)
 497                 return rc;
 498         if (val)
 499                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 500         else
 501                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 502
 503         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 504                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 505         if (rc)
 506                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 507
 508         return count;
 509 }
 510
 511 static int ll_rd_max_rw_chunk(char *page, char **start, off_t off,
 512                           int count, int *eof, void *data)
 513 {
 514         struct super_block *sb = data;
 515
 516         return snprintf(page, count, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk);
 517 }
 518
 519 static int ll_wr_max_rw_chunk(struct file *file, const char *buffer,
 520                           unsigned long count, void *data)
 521 {
 522         struct super_block *sb = data;
 523         int rc, val;
 524
 525         rc = lprocfs_write_helper(buffer, count, &val);
 526         if (rc)
 527                 return rc;
 528         ll_s2sbi(sb)->ll_max_rw_chunk = val;
 529         return count;
 530 }
 531
 532 static int ll_rd_track_id(char *page, int count, void *data,
 533                           enum stats_track_type type)
 534 {
 535         struct super_block *sb = data;
 536
 537         if (ll_s2sbi(sb)->ll_stats_track_type == type) {
 538                 return snprintf(page, count, "%d\n",
 539                                 ll_s2sbi(sb)->ll_stats_track_id);
 540
 541         } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
 542                 return snprintf(page, count, "0 (all)\n");
 543         } else {
 544                 return snprintf(page, count, "untracked\n");
 545         }
 546 }
 547
 548 static int ll_wr_track_id(const char *buffer, unsigned long count, void *data,
 549                           enum stats_track_type type)
 550 {
 551         struct super_block *sb = data;
 552         int rc, pid;
 553
 554         rc = lprocfs_write_helper(buffer, count, &pid);
 555         if (rc)
 556                 return rc;
 557         ll_s2sbi(sb)->ll_stats_track_id = pid;
 558         if (pid == 0)
 559                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 560         else
 561                 ll_s2sbi(sb)->ll_stats_track_type = type;
 562         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 563         return count;
 564 }
 565
 566 static int ll_rd_track_pid(char *page, char **start, off_t off,
 567                           int count, int *eof, void *data)
 568 {
 569         return (ll_rd_track_id(page, count, data, STATS_TRACK_PID));
 570 }
 571
 572 static int ll_wr_track_pid(struct file *file, const char *buffer,
 573                           unsigned long count, void *data)
 574 {
 575         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PID));
 576 }
 577
 578 static int ll_rd_track_ppid(char *page, char **start, off_t off,
 579                           int count, int *eof, void *data)
 580 {
 581         return (ll_rd_track_id(page, count, data, STATS_TRACK_PPID));
 582 }
 583
 584 static int ll_wr_track_ppid(struct file *file, const char *buffer,
 585                           unsigned long count, void *data)
 586 {
 587         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PPID));
 588 }
 589
 590 static int ll_rd_track_gid(char *page, char **start, off_t off,
 591                           int count, int *eof, void *data)
 592 {
 593         return (ll_rd_track_id(page, count, data, STATS_TRACK_GID));
 594 }
 595
 596 static int ll_wr_track_gid(struct file *file, const char *buffer,
 597                           unsigned long count, void *data)
 598 {
 599         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_GID));
 600 }
 601
 602 static int ll_rd_statahead_max(char *page, char **start, off_t off,
 603                                int count, int *eof, void *data)
 604 {
 605         struct super_block *sb = data;
 606         struct ll_sb_info *sbi = ll_s2sbi(sb);
 607
 608         return snprintf(page, count, "%u\n", sbi->ll_sa_max);
 609 }
 610
 611 static int ll_wr_statahead_max(struct file *file, const char *buffer,
 612                                unsigned long count, void *data)
 613 {
 614         struct super_block *sb = data;
 615         struct ll_sb_info *sbi = ll_s2sbi(sb);
 616         int val, rc;
 617
 618         rc = lprocfs_write_helper(buffer, count, &val);
 619         if (rc)
 620                 return rc;
 621
 622         if (val >= 0 && val <= LL_SA_RPC_MAX)
 623                 sbi->ll_sa_max = val;
 624         else
 625                 CERROR("Bad statahead_max value %d. Valid values are in the "
 626                        "range [0, %d]\n", val, LL_SA_RPC_MAX);
 627
 628         return count;
 629 }
 630
 631 static int ll_rd_statahead_agl(char *page, char **start, off_t off,
 632                                int count, int *eof, void *data)
 633 {
 634         struct super_block *sb = data;
 635         struct ll_sb_info *sbi = ll_s2sbi(sb);
 636
 637         return snprintf(page, count, "%u\n",
 638                         sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
 639 }
 640
 641 static int ll_wr_statahead_agl(struct file *file, const char *buffer,
 642                                unsigned long count, void *data)
 643 {
 644         struct super_block *sb = data;
 645         struct ll_sb_info *sbi = ll_s2sbi(sb);
 646         int val, rc;
 647
 648         rc = lprocfs_write_helper(buffer, count, &val);
 649         if (rc)
 650                 return rc;
 651
 652         if (val)
 653                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 654         else
 655                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
 656
 657         return count;
 658 }
 659
 660 static int ll_rd_statahead_stats(char *page, char **start, off_t off,
 661                                  int count, int *eof, void *data)
 662 {
 663         struct super_block *sb = data;
 664         struct ll_sb_info *sbi = ll_s2sbi(sb);
 665
 666         return snprintf(page, count,
 667                         "statahead total: %u\n"
 668                         "statahead wrong: %u\n"
 669                         "agl total: %u\n",
 670                         atomic_read(&sbi->ll_sa_total),
 671                         atomic_read(&sbi->ll_sa_wrong),
 672                         atomic_read(&sbi->ll_agl_total));
 673 }
 674
 675 static int ll_rd_lazystatfs(char *page, char **start, off_t off,
 676                             int count, int *eof, void *data)
 677 {
 678         struct super_block *sb = data;
 679         struct ll_sb_info *sbi = ll_s2sbi(sb);
 680
 681         return snprintf(page, count, "%u\n",
 682                         (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 683 }
 684
 685 static int ll_wr_lazystatfs(struct file *file, const char *buffer,
 686                             unsigned long count, void *data)
 687 {
 688         struct super_block *sb = data;
 689         struct ll_sb_info *sbi = ll_s2sbi(sb);
 690         int val, rc;
 691
 692         rc = lprocfs_write_helper(buffer, count, &val);
 693         if (rc)
 694                 return rc;
 695
 696         if (val)
 697                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 698         else
 699                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 700
 701         return count;
 702 }
 703
 704 static int ll_rd_maxea_size(char *page, char **start, off_t off,
 705                             int count, int *eof, void *data)
 706 {
 707         struct super_block *sb = data;
 708         struct ll_sb_info *sbi = ll_s2sbi(sb);
 709         unsigned int ealen;
 710         int rc;
 711
 712         rc = ll_get_max_mdsize(sbi, &ealen);
 713         if (rc)
 714                 return rc;
 715
 716         return snprintf(page, count, "%u\n", ealen);
 717 }
 718
 719 static int ll_rd_sbi_flags(char *page, char **start, off_t off,
 720                                 int count, int *eof, void *data)
 721 {
 722         const char *str[] = LL_SBI_FLAGS;
 723         struct super_block *sb = data;
 724         int flags = ll_s2sbi(sb)->ll_flags;
 725         int i = 0;
 726         int rc = 0;
 727
 728         while (flags != 0) {
 729                 if (ARRAY_SIZE(str) <= i) {
 730                         CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
 731                                 "flags please.\n", ll_get_fsname(sb, NULL, 0));
 732                         return -EINVAL;
 733                 }
 734
 735                 if (flags & 0x1)
 736                         rc += snprintf(page + rc, count - rc, "%s ", str[i]);
 737                 flags >>= 1;
 738                 ++i;
 739         }
 740         if (rc > 0)
 741                 rc += snprintf(page + rc, count - rc, "\b\n");
 742         return rc;
 743 }
 744
 745 static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 746         { "uuid",         ll_rd_sb_uuid,          0, 0 },
 747         //{ "mntpt_path",   ll_rd_path,             0, 0 },
 748         { "fstype",       ll_rd_fstype,           0, 0 },
 749         { "site",         ll_rd_site_stats,       0, 0 },
 750         { "blocksize",    ll_rd_blksize,          0, 0 },
 751         { "kbytestotal",  ll_rd_kbytestotal,      0, 0 },
 752         { "kbytesfree",   ll_rd_kbytesfree,       0, 0 },
 753         { "kbytesavail",  ll_rd_kbytesavail,      0, 0 },
 754         { "filestotal",   ll_rd_filestotal,       0, 0 },
 755         { "filesfree",    ll_rd_filesfree,        0, 0 },
 756         { "client_type",  ll_rd_client_type,      0, 0 },
 757         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
 758         { "max_read_ahead_mb", ll_rd_max_readahead_mb,
 759                                ll_wr_max_readahead_mb, 0 },
 760         { "max_read_ahead_per_file_mb", ll_rd_max_readahead_per_file_mb,
 761                                         ll_wr_max_readahead_per_file_mb, 0 },
 762         { "max_read_ahead_whole_mb", ll_rd_max_read_ahead_whole_mb,
 763                                      ll_wr_max_read_ahead_whole_mb, 0 },
 764         { "max_cached_mb",    ll_rd_max_cached_mb, ll_wr_max_cached_mb, 0 },
 765         { "checksum_pages",   ll_rd_checksum, ll_wr_checksum, 0 },
 766         { "max_rw_chunk",     ll_rd_max_rw_chunk, ll_wr_max_rw_chunk, 0 },
 767         { "stats_track_pid",  ll_rd_track_pid, ll_wr_track_pid, 0 },
 768         { "stats_track_ppid", ll_rd_track_ppid, ll_wr_track_ppid, 0 },
 769         { "stats_track_gid",  ll_rd_track_gid, ll_wr_track_gid, 0 },
 770         { "statahead_max",    ll_rd_statahead_max, ll_wr_statahead_max, 0 },
 771         { "statahead_agl",    ll_rd_statahead_agl, ll_wr_statahead_agl, 0 },
 772         { "statahead_stats",  ll_rd_statahead_stats, 0, 0 },
 773         { "lazystatfs",       ll_rd_lazystatfs, ll_wr_lazystatfs, 0 },
 774         { "max_easize",       ll_rd_maxea_size, 0, 0 },
 775         { "sbi_flags",        ll_rd_sbi_flags, 0, 0 },
 776         { 0 }
 777 };
 778
 779 #define MAX_STRING_SIZE 128
 780
 781 struct llite_file_opcode {
 782         __u32       opcode;
 783         __u32       type;
 784         const char *opname;
 785 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 786         /* file operation */
 787         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 788         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 789         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 790                                    "read_bytes" },
 791         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 792                                    "write_bytes" },
 793         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 794                                    "brw_read" },
 795         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 796                                    "brw_write" },
 797         { LPROC_LL_OSC_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 798                                    "osc_read" },
 799         { LPROC_LL_OSC_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 800                                    "osc_write" },
 801         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
 802         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 803         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
 804         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
 805         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
 806         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
 807         { LPROC_LL_READDIR,        LPROCFS_TYPE_REGS, "readdir" },
 808         /* inode operation */
 809         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
 810         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "truncate" },
 811         { LPROC_LL_FLOCK,          LPROCFS_TYPE_REGS, "flock" },
 812         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
 813         /* dir inode operation */
 814         { LPROC_LL_CREATE,         LPROCFS_TYPE_REGS, "create" },
 815         { LPROC_LL_LINK,           LPROCFS_TYPE_REGS, "link" },
 816         { LPROC_LL_UNLINK,         LPROCFS_TYPE_REGS, "unlink" },
 817         { LPROC_LL_SYMLINK,        LPROCFS_TYPE_REGS, "symlink" },
 818         { LPROC_LL_MKDIR,          LPROCFS_TYPE_REGS, "mkdir" },
 819         { LPROC_LL_RMDIR,          LPROCFS_TYPE_REGS, "rmdir" },
 820         { LPROC_LL_MKNOD,          LPROCFS_TYPE_REGS, "mknod" },
 821         { LPROC_LL_RENAME,         LPROCFS_TYPE_REGS, "rename" },
 822         /* special inode operation */
 823         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
 824         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 825         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 826         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 827         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
 828         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
 829         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
 830 };
 831
 832 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 833 {
 834         if (!sbi->ll_stats)
 835                 return;
 836         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 837                 lprocfs_counter_add(sbi->ll_stats, op, count);
 838         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
 839                  sbi->ll_stats_track_id == current->pid)
 840                 lprocfs_counter_add(sbi->ll_stats, op, count);
 841         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
 842                  sbi->ll_stats_track_id == current->parent->pid)
 843                 lprocfs_counter_add(sbi->ll_stats, op, count);
 844         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 845                  sbi->ll_stats_track_id == cfs_curproc_gid())
 846                 lprocfs_counter_add(sbi->ll_stats, op, count);
 847 }
 848 EXPORT_SYMBOL(ll_stats_ops_tally);
 849
 850 static const char *ra_stat_string[] = {
 851         [RA_STAT_HIT] = "hits",
 852         [RA_STAT_MISS] = "misses",
 853         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 854         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 855         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
 856         [RA_STAT_FAILED_MATCH] = "failed lock match",
 857         [RA_STAT_DISCARDED] = "read but discarded",
 858         [RA_STAT_ZERO_LEN] = "zero length file",
 859         [RA_STAT_ZERO_WINDOW] = "zero size window",
 860         [RA_STAT_EOF] = "read-ahead to EOF",
 861         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 862         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
 863 };
 864
 865
 866 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 867                                 struct super_block *sb, char *osc, char *mdc)
 868 {
 869         struct lprocfs_vars lvars[2];
 870         struct lustre_sb_info *lsi = s2lsi(sb);
 871         struct ll_sb_info *sbi = ll_s2sbi(sb);
 872         struct obd_device *obd;
 873         char name[MAX_STRING_SIZE + 1], *ptr;
 874         int err, id, len, rc;
 875         ENTRY;
 876
 877         memset(lvars, 0, sizeof(lvars));
 878
 879         name[MAX_STRING_SIZE] = '\0';
 880         lvars[0].name = name;
 881
 882         LASSERT(sbi != NULL);
 883         LASSERT(mdc != NULL);
 884         LASSERT(osc != NULL);
 885
 886         /* Get fsname */
 887         len = strlen(lsi->lsi_lmd->lmd_profile);
 888         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
 889         if (ptr && (strcmp(ptr, "-client") == 0))
 890                 len -= 7;
 891
 892         /* Mount info */
 893         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
 894                  lsi->lsi_lmd->lmd_profile, sb);
 895
 896         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 897         if (IS_ERR(sbi->ll_proc_root)) {
 898                 err = PTR_ERR(sbi->ll_proc_root);
 899                 sbi->ll_proc_root = NULL;
 900                 RETURN(err);
 901         }
 902
 903         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
 904                                 &vvp_dump_pgcache_file_ops, sbi);
 905         if (rc)
 906                 CWARN("Error adding the dump_page_cache file\n");
 907
 908         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
 909                                 &ll_rw_extents_stats_fops, sbi);
 910         if (rc)
 911                 CWARN("Error adding the extent_stats file\n");
 912
 913         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
 914                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
 915         if (rc)
 916                 CWARN("Error adding the extents_stats_per_process file\n");
 917
 918         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
 919                                 &ll_rw_offset_stats_fops, sbi);
 920         if (rc)
 921                 CWARN("Error adding the offset_stats file\n");
 922
 923         /* File operations stats */
 924         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
 925                                             LPROCFS_STATS_FLAG_NONE);
 926         if (sbi->ll_stats == NULL)
 927                 GOTO(out, err = -ENOMEM);
 928         /* do counter init */
 929         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 930                 __u32 type = llite_opcode_table[id].type;
 931                 void *ptr = NULL;
 932                 if (type & LPROCFS_TYPE_REGS)
 933                         ptr = "regs";
 934                 else if (type & LPROCFS_TYPE_BYTES)
 935                         ptr = "bytes";
 936                 else if (type & LPROCFS_TYPE_PAGES)
 937                         ptr = "pages";
 938                 lprocfs_counter_init(sbi->ll_stats,
 939                                      llite_opcode_table[id].opcode,
 940                                      (type & LPROCFS_CNTR_AVGMINMAX),
 941                                      llite_opcode_table[id].opname, ptr);
 942         }
 943         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
 944         if (err)
 945                 GOTO(out, err);
 946
 947         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
 948                                                LPROCFS_STATS_FLAG_NONE);
 949         if (sbi->ll_ra_stats == NULL)
 950                 GOTO(out, err = -ENOMEM);
 951
 952         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
 953                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
 954                                      ra_stat_string[id], "pages");
 955         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
 956                                      sbi->ll_ra_stats);
 957         if (err)
 958                 GOTO(out, err);
 959
 960
 961         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
 962         if (err)
 963                 GOTO(out, err);
 964
 965         /* MDC info */
 966         obd = class_name2obd(mdc);
 967
 968         LASSERT(obd != NULL);
 969         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 970         LASSERT(obd->obd_type->typ_name != NULL);
 971
 972         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 973                  obd->obd_type->typ_name);
 974         lvars[0].read_fptr = lprocfs_rd_name;
 975         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 976         if (err)
 977                 GOTO(out, err);
 978
 979         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
 980         lvars[0].read_fptr = lprocfs_rd_uuid;
 981         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 982         if (err)
 983                 GOTO(out, err);
 984
 985         /* OSC */
 986         obd = class_name2obd(osc);
 987
 988         LASSERT(obd != NULL);
 989         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 990         LASSERT(obd->obd_type->typ_name != NULL);
 991
 992         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
 993                  obd->obd_type->typ_name);
 994         lvars[0].read_fptr = lprocfs_rd_name;
 995         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
 996         if (err)
 997                 GOTO(out, err);
 998
 999         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
1000         lvars[0].read_fptr = lprocfs_rd_uuid;
1001         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
1002 out:
1003         if (err) {
1004                 lprocfs_remove(&sbi->ll_proc_root);
1005                 lprocfs_free_stats(&sbi->ll_ra_stats);
1006                 lprocfs_free_stats(&sbi->ll_stats);
1007         }
1008         RETURN(err);
1009 }
1010
1011 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
1012 {
1013         if (sbi->ll_proc_root) {
1014                 lprocfs_remove(&sbi->ll_proc_root);
1015                 lprocfs_free_stats(&sbi->ll_ra_stats);
1016                 lprocfs_free_stats(&sbi->ll_stats);
1017         }
1018 }
1019 #undef MAX_STRING_SIZE
1020
1021 #define pct(a,b) (b ? a * 100 / b : 0)
1022
1023 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1024                                    struct seq_file *seq, int which)
1025 {
1026         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1027         unsigned long start, end, r, w;
1028         char *unitp = "KMGTPEZY";
1029         int i, units = 10;
1030         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1031
1032         read_cum = 0;
1033         write_cum = 0;
1034         start = 0;
1035
1036         for(i = 0; i < LL_HIST_MAX; i++) {
1037                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1038                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1039         }
1040
1041         for(i = 0; i < LL_HIST_MAX; i++) {
1042                 r = pp_info->pp_r_hist.oh_buckets[i];
1043                 w = pp_info->pp_w_hist.oh_buckets[i];
1044                 read_cum += r;
1045                 write_cum += w;
1046                 end = 1 << (i + LL_HIST_START - units);
1047                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
1048                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
1049                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1050                            r, pct(r, read_tot), pct(read_cum, read_tot),
1051                            w, pct(w, write_tot), pct(write_cum, write_tot));
1052                 start = end;
1053                 if (start == 1<<10) {
1054                         start = 1;
1055                         units += 10;
1056                         unitp++;
1057                 }
1058                 if (read_cum == read_tot && write_cum == write_tot)
1059                         break;
1060         }
1061 }
1062
1063 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1064 {
1065         struct timeval now;
1066         struct ll_sb_info *sbi = seq->private;
1067         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1068         int k;
1069
1070         cfs_gettimeofday(&now);
1071
1072         if (!sbi->ll_rw_stats_on) {
1073                 seq_printf(seq, "disabled\n"
1074                                 "write anything in this file to activate, "
1075                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1076                 return 0;
1077         }
1078         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1079                    now.tv_sec, now.tv_usec);
1080         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1081         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1082                    "extents", "calls", "%", "cum%",
1083                    "calls", "%", "cum%");
1084         spin_lock(&sbi->ll_pp_extent_lock);
1085         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1086                 if (io_extents->pp_extents[k].pid != 0) {
1087                         seq_printf(seq, "\nPID: %d\n",
1088                                    io_extents->pp_extents[k].pid);
1089                         ll_display_extents_info(io_extents, seq, k);
1090                 }
1091         }
1092         spin_unlock(&sbi->ll_pp_extent_lock);
1093         return 0;
1094 }
1095
1096 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1097                                                 const char *buf, size_t len,
1098                                                 loff_t *off)
1099 {
1100         struct seq_file *seq = file->private_data;
1101         struct ll_sb_info *sbi = seq->private;
1102         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1103         int i;
1104         int value = 1, rc = 0;
1105
1106         rc = lprocfs_write_helper(buf, len, &value);
1107         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1108                        strcmp(buf, "Disabled") == 0))
1109                 value = 0;
1110
1111         if (value == 0)
1112                 sbi->ll_rw_stats_on = 0;
1113         else
1114                 sbi->ll_rw_stats_on = 1;
1115
1116         spin_lock(&sbi->ll_pp_extent_lock);
1117         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1118                 io_extents->pp_extents[i].pid = 0;
1119                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1120                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1121         }
1122         spin_unlock(&sbi->ll_pp_extent_lock);
1123         return len;
1124 }
1125
1126 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1127
1128 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1129 {
1130         struct timeval now;
1131         struct ll_sb_info *sbi = seq->private;
1132         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1133
1134         cfs_gettimeofday(&now);
1135
1136         if (!sbi->ll_rw_stats_on) {
1137                 seq_printf(seq, "disabled\n"
1138                                 "write anything in this file to activate, "
1139                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1140                 return 0;
1141         }
1142         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1143                    now.tv_sec, now.tv_usec);
1144
1145         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1146         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1147                    "extents", "calls", "%", "cum%",
1148                    "calls", "%", "cum%");
1149         spin_lock(&sbi->ll_lock);
1150         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1151         spin_unlock(&sbi->ll_lock);
1152
1153         return 0;
1154 }
1155
1156 static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf,
1157                                         size_t len, loff_t *off)
1158 {
1159         struct seq_file *seq = file->private_data;
1160         struct ll_sb_info *sbi = seq->private;
1161         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1162         int i;
1163         int value = 1, rc = 0;
1164
1165         rc = lprocfs_write_helper(buf, len, &value);
1166         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1167                        strcmp(buf, "Disabled") == 0))
1168                 value = 0;
1169
1170         if (value == 0)
1171                 sbi->ll_rw_stats_on = 0;
1172         else
1173                 sbi->ll_rw_stats_on = 1;
1174         spin_lock(&sbi->ll_pp_extent_lock);
1175         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1176                 io_extents->pp_extents[i].pid = 0;
1177                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1178                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1179         }
1180         spin_unlock(&sbi->ll_pp_extent_lock);
1181
1182         return len;
1183 }
1184
1185 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1186
1187 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1188                        struct ll_file_data *file, loff_t pos,
1189                        size_t count, int rw)
1190 {
1191         int i, cur = -1;
1192         struct ll_rw_process_info *process;
1193         struct ll_rw_process_info *offset;
1194         int *off_count = &sbi->ll_rw_offset_entry_count;
1195         int *process_count = &sbi->ll_offset_process_count;
1196         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1197
1198         if(!sbi->ll_rw_stats_on)
1199                 return;
1200         process = sbi->ll_rw_process_info;
1201         offset = sbi->ll_rw_offset_info;
1202
1203         spin_lock(&sbi->ll_pp_extent_lock);
1204         /* Extent statistics */
1205         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1206                 if(io_extents->pp_extents[i].pid == pid) {
1207                         cur = i;
1208                         break;
1209                 }
1210         }
1211
1212         if (cur == -1) {
1213                 /* new process */
1214                 sbi->ll_extent_process_count =
1215                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1216                 cur = sbi->ll_extent_process_count;
1217                 io_extents->pp_extents[cur].pid = pid;
1218                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1219                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1220         }
1221
1222         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1223              (i < (LL_HIST_MAX - 1)); i++);
1224         if (rw == 0) {
1225                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1226                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1227         } else {
1228                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1229                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1230         }
1231         spin_unlock(&sbi->ll_pp_extent_lock);
1232
1233         spin_lock(&sbi->ll_process_lock);
1234         /* Offset statistics */
1235         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1236                 if (process[i].rw_pid == pid) {
1237                         if (process[i].rw_last_file != file) {
1238                                 process[i].rw_range_start = pos;
1239                                 process[i].rw_last_file_pos = pos + count;
1240                                 process[i].rw_smallest_extent = count;
1241                                 process[i].rw_largest_extent = count;
1242                                 process[i].rw_offset = 0;
1243                                 process[i].rw_last_file = file;
1244                                 spin_unlock(&sbi->ll_process_lock);
1245                                 return;
1246                         }
1247                         if (process[i].rw_last_file_pos != pos) {
1248                                 *off_count =
1249                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1250                                 offset[*off_count].rw_op = process[i].rw_op;
1251                                 offset[*off_count].rw_pid = pid;
1252                                 offset[*off_count].rw_range_start =
1253                                         process[i].rw_range_start;
1254                                 offset[*off_count].rw_range_end =
1255                                         process[i].rw_last_file_pos;
1256                                 offset[*off_count].rw_smallest_extent =
1257                                         process[i].rw_smallest_extent;
1258                                 offset[*off_count].rw_largest_extent =
1259                                         process[i].rw_largest_extent;
1260                                 offset[*off_count].rw_offset =
1261                                         process[i].rw_offset;
1262                                 process[i].rw_op = rw;
1263                                 process[i].rw_range_start = pos;
1264                                 process[i].rw_smallest_extent = count;
1265                                 process[i].rw_largest_extent = count;
1266                                 process[i].rw_offset = pos -
1267                                         process[i].rw_last_file_pos;
1268                         }
1269                         if(process[i].rw_smallest_extent > count)
1270                                 process[i].rw_smallest_extent = count;
1271                         if(process[i].rw_largest_extent < count)
1272                                 process[i].rw_largest_extent = count;
1273                         process[i].rw_last_file_pos = pos + count;
1274                         spin_unlock(&sbi->ll_process_lock);
1275                         return;
1276                 }
1277         }
1278         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1279         process[*process_count].rw_pid = pid;
1280         process[*process_count].rw_op = rw;
1281         process[*process_count].rw_range_start = pos;
1282         process[*process_count].rw_last_file_pos = pos + count;
1283         process[*process_count].rw_smallest_extent = count;
1284         process[*process_count].rw_largest_extent = count;
1285         process[*process_count].rw_offset = 0;
1286         process[*process_count].rw_last_file = file;
1287         spin_unlock(&sbi->ll_process_lock);
1288 }
1289
1290 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1291 {
1292         struct timeval now;
1293         struct ll_sb_info *sbi = seq->private;
1294         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1295         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1296         int i;
1297
1298         cfs_gettimeofday(&now);
1299
1300         if (!sbi->ll_rw_stats_on) {
1301                 seq_printf(seq, "disabled\n"
1302                                 "write anything in this file to activate, "
1303                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1304                 return 0;
1305         }
1306         spin_lock(&sbi->ll_process_lock);
1307
1308         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1309                    now.tv_sec, now.tv_usec);
1310         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1311                    "R/W", "PID", "RANGE START", "RANGE END",
1312                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1313
1314         /* We stored the discontiguous offsets here; print them first */
1315         for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1316                 if (offset[i].rw_pid != 0)
1317                         seq_printf(seq,
1318                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1319                                    offset[i].rw_op == READ ? 'R' : 'W',
1320                                    offset[i].rw_pid,
1321                                    offset[i].rw_range_start,
1322                                    offset[i].rw_range_end,
1323                                    (unsigned long)offset[i].rw_smallest_extent,
1324                                    (unsigned long)offset[i].rw_largest_extent,
1325                                    offset[i].rw_offset);
1326         }
1327
1328         /* Then print the current offsets for each process */
1329         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1330                 if (process[i].rw_pid != 0)
1331                         seq_printf(seq,
1332                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1333                                    process[i].rw_op == READ ? 'R' : 'W',
1334                                    process[i].rw_pid,
1335                                    process[i].rw_range_start,
1336                                    process[i].rw_last_file_pos,
1337                                    (unsigned long)process[i].rw_smallest_extent,
1338                                    (unsigned long)process[i].rw_largest_extent,
1339                                    process[i].rw_offset);
1340         }
1341         spin_unlock(&sbi->ll_process_lock);
1342
1343         return 0;
1344 }
1345
1346 static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf,
1347                                        size_t len, loff_t *off)
1348 {
1349         struct seq_file *seq = file->private_data;
1350         struct ll_sb_info *sbi = seq->private;
1351         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1352         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1353         int value = 1, rc = 0;
1354
1355         rc = lprocfs_write_helper(buf, len, &value);
1356
1357         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1358                            strcmp(buf, "Disabled") == 0))
1359                 value = 0;
1360
1361         if (value == 0)
1362                 sbi->ll_rw_stats_on = 0;
1363         else
1364                 sbi->ll_rw_stats_on = 1;
1365
1366         spin_lock(&sbi->ll_process_lock);
1367         sbi->ll_offset_process_count = 0;
1368         sbi->ll_rw_offset_entry_count = 0;
1369         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1370                LL_PROCESS_HIST_MAX);
1371         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1372                LL_OFFSET_HIST_MAX);
1373         spin_unlock(&sbi->ll_process_lock);
1374
1375         return len;
1376 }
1377
1378 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1379
1380 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
1381 {
1382     lvars->module_vars  = NULL;
1383     lvars->obd_vars     = lprocfs_llite_obd_vars;
1384 }
1385 #endif /* LPROCFS */