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