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_xattr_cache(char *page, char **start, off_t off,
 222                                 int count, int *eof, void *data)
 223 {
 224         struct super_block *sb = (struct super_block *)data;
 225         struct ll_sb_info *sbi = ll_s2sbi(sb);
 226         int rc;
 227
 228         rc = snprintf(page, count, "%u\n", sbi->ll_xattr_cache_enabled);
 229
 230         return rc;
 231 }
 232
 233 static int ll_wr_xattr_cache(struct file *file, const char *buffer,
 234                                 unsigned long count, void *data)
 235 {
 236         struct super_block *sb = (struct super_block *)data;
 237         struct ll_sb_info *sbi = ll_s2sbi(sb);
 238         int val, rc;
 239
 240         rc = lprocfs_write_helper(buffer, count, &val);
 241         if (rc)
 242                 return rc;
 243
 244         if (val != 0 && val != 1)
 245                 return -ERANGE;
 246
 247         if (val == 1 && !(sbi->ll_flags & LL_SBI_XATTR_CACHE))
 248                 return -ENOTSUPP;
 249
 250         sbi->ll_xattr_cache_enabled = val;
 251
 252         return count;
 253 }
 254
 255 static int ll_rd_site_stats(char *page, char **start, off_t off,
 256                             int count, int *eof, void *data)
 257 {
 258         struct super_block *sb = data;
 259
 260         /*
 261          * See description of statistical counters in struct cl_site, and
 262          * struct lu_site.
 263          */
 264         return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site),
 265                                    page, count);
 266 }
 267
 268 static int ll_rd_max_readahead_mb(char *page, char **start, off_t off,
 269                                    int count, int *eof, void *data)
 270 {
 271         struct super_block *sb = data;
 272         struct ll_sb_info *sbi = ll_s2sbi(sb);
 273         long pages_number;
 274         int mult;
 275
 276         spin_lock(&sbi->ll_lock);
 277         pages_number = sbi->ll_ra_info.ra_max_pages;
 278         spin_unlock(&sbi->ll_lock);
 279
 280         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 281         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 282 }
 283
 284 static int ll_wr_max_readahead_mb(struct file *file, const char *buffer,
 285                                   unsigned long count, void *data)
 286 {
 287         struct super_block *sb = data;
 288         struct ll_sb_info *sbi = ll_s2sbi(sb);
 289         int mult, rc, pages_number;
 290
 291         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 292         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 293         if (rc)
 294                 return rc;
 295
 296         if (pages_number < 0 || pages_number > totalram_pages / 2) {
 297                 /* 1/2 of RAM */
 298                 CERROR("can't set file readahead more than %lu MB\n",
 299                        totalram_pages >> (20 - PAGE_CACHE_SHIFT + 1));
 300                 return -ERANGE;
 301         }
 302
 303         spin_lock(&sbi->ll_lock);
 304         sbi->ll_ra_info.ra_max_pages = pages_number;
 305         spin_unlock(&sbi->ll_lock);
 306
 307         return count;
 308 }
 309
 310 static int ll_rd_max_readahead_per_file_mb(char *page, char **start, off_t off,
 311                                            int count, int *eof, void *data)
 312 {
 313         struct super_block *sb = data;
 314         struct ll_sb_info *sbi = ll_s2sbi(sb);
 315         long pages_number;
 316         int mult;
 317
 318         spin_lock(&sbi->ll_lock);
 319         pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
 320         spin_unlock(&sbi->ll_lock);
 321
 322         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 323         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 324 }
 325
 326 static int ll_wr_max_readahead_per_file_mb(struct file *file, const char *buffer,
 327                                           unsigned long count, void *data)
 328 {
 329         struct super_block *sb = data;
 330         struct ll_sb_info *sbi = ll_s2sbi(sb);
 331         int mult, rc, pages_number;
 332
 333         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 334         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 335         if (rc)
 336                 return rc;
 337
 338         if (pages_number < 0 ||
 339                 pages_number > sbi->ll_ra_info.ra_max_pages) {
 340                 CERROR("can't set file readahead more than"
 341                        "max_read_ahead_mb %lu MB\n",
 342                        sbi->ll_ra_info.ra_max_pages);
 343                 return -ERANGE;
 344         }
 345
 346         spin_lock(&sbi->ll_lock);
 347         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 348         spin_unlock(&sbi->ll_lock);
 349
 350         return count;
 351 }
 352
 353 static int ll_rd_max_read_ahead_whole_mb(char *page, char **start, off_t off,
 354                                          int count, int *eof, void *data)
 355 {
 356         struct super_block *sb = data;
 357         struct ll_sb_info *sbi = ll_s2sbi(sb);
 358         long pages_number;
 359         int mult;
 360
 361         spin_lock(&sbi->ll_lock);
 362         pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
 363         spin_unlock(&sbi->ll_lock);
 364
 365         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 366         return lprocfs_read_frac_helper(page, count, pages_number, mult);
 367 }
 368
 369 static int ll_wr_max_read_ahead_whole_mb(struct file *file, const char *buffer,
 370                                          unsigned long count, void *data)
 371 {
 372         struct super_block *sb = data;
 373         struct ll_sb_info *sbi = ll_s2sbi(sb);
 374         int mult, rc, pages_number;
 375
 376         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 377         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 378         if (rc)
 379                 return rc;
 380
 381         /* Cap this at the current max readahead window size, the readahead
 382          * algorithm does this anyway so it's pointless to set it larger. */
 383         if (pages_number < 0 ||
 384             pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
 385                 CERROR("can't set max_read_ahead_whole_mb more than "
 386                        "max_read_ahead_per_file_mb: %lu\n",
 387                         sbi->ll_ra_info.ra_max_pages_per_file >>
 388                         (20 - PAGE_CACHE_SHIFT));
 389                 return -ERANGE;
 390         }
 391
 392         spin_lock(&sbi->ll_lock);
 393         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 394         spin_unlock(&sbi->ll_lock);
 395
 396         return count;
 397 }
 398
 399 static int ll_rd_max_cached_mb(char *page, char **start, off_t off,
 400                                int count, int *eof, void *data)
 401 {
 402         struct super_block     *sb    = data;
 403         struct ll_sb_info      *sbi   = ll_s2sbi(sb);
 404         struct cl_client_cache *cache = &sbi->ll_cache;
 405         int shift = 20 - PAGE_CACHE_SHIFT;
 406         int max_cached_mb;
 407         int unused_mb;
 408
 409         *eof = 1;
 410         max_cached_mb = cache->ccc_lru_max >> shift;
 411         unused_mb = cfs_atomic_read(&cache->ccc_lru_left) >> shift;
 412         return snprintf(page, count,
 413                         "users: %d\n"
 414                         "max_cached_mb: %d\n"
 415                         "used_mb: %d\n"
 416                         "unused_mb: %d\n"
 417                         "reclaim_count: %u\n",
 418                         cfs_atomic_read(&cache->ccc_users),
 419                         max_cached_mb,
 420                         max_cached_mb - unused_mb,
 421                         unused_mb,
 422                         cache->ccc_lru_shrinkers);
 423 }
 424
 425 static int ll_wr_max_cached_mb(struct file *file, const char *buffer,
 426                                unsigned long count, void *data)
 427 {
 428         struct super_block *sb = data;
 429         struct ll_sb_info *sbi = ll_s2sbi(sb);
 430         struct cl_client_cache *cache = &sbi->ll_cache;
 431         struct lu_env *env;
 432         int refcheck;
 433         int mult, rc, pages_number;
 434         int diff = 0;
 435         int nrpages = 0;
 436         ENTRY;
 437
 438         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 439         buffer = lprocfs_find_named_value(buffer, "max_cached_mb:", &count);
 440         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 441         if (rc)
 442                 RETURN(rc);
 443
 444         if (pages_number < 0 || pages_number > totalram_pages) {
 445                 CERROR("%s: can't set max cache more than %lu MB\n",
 446                        ll_get_fsname(sb, NULL, 0),
 447                        totalram_pages >> (20 - PAGE_CACHE_SHIFT));
 448                 RETURN(-ERANGE);
 449         }
 450
 451         if (sbi->ll_dt_exp == NULL) /* being initialized */
 452                 GOTO(out, rc = 0);
 453
 454         spin_lock(&sbi->ll_lock);
 455         diff = pages_number - cache->ccc_lru_max;
 456         spin_unlock(&sbi->ll_lock);
 457
 458         /* easy - add more LRU slots. */
 459         if (diff >= 0) {
 460                 cfs_atomic_add(diff, &cache->ccc_lru_left);
 461                 GOTO(out, rc = 0);
 462         }
 463
 464         env = cl_env_get(&refcheck);
 465         if (IS_ERR(env))
 466                 RETURN(rc);
 467
 468         diff = -diff;
 469         while (diff > 0) {
 470                 int tmp;
 471
 472                 /* reduce LRU budget from free slots. */
 473                 do {
 474                         int ov, nv;
 475
 476                         ov = cfs_atomic_read(&cache->ccc_lru_left);
 477                         if (ov == 0)
 478                                 break;
 479
 480                         nv = ov > diff ? ov - diff : 0;
 481                         rc = cfs_atomic_cmpxchg(&cache->ccc_lru_left, ov, nv);
 482                         if (likely(ov == rc)) {
 483                                 diff -= ov - nv;
 484                                 nrpages += ov - nv;
 485                                 break;
 486                         }
 487                 } while (1);
 488
 489                 if (diff <= 0)
 490                         break;
 491
 492                 /* difficult - have to ask OSCs to drop LRU slots. */
 493                 tmp = diff << 1;
 494                 rc = obd_set_info_async(env, sbi->ll_dt_exp,
 495                                 sizeof(KEY_CACHE_LRU_SHRINK),
 496                                 KEY_CACHE_LRU_SHRINK,
 497                                 sizeof(tmp), &tmp, NULL);
 498                 if (rc < 0)
 499                         break;
 500         }
 501         cl_env_put(env, &refcheck);
 502
 503 out:
 504         if (rc >= 0) {
 505                 spin_lock(&sbi->ll_lock);
 506                 cache->ccc_lru_max = pages_number;
 507                 spin_unlock(&sbi->ll_lock);
 508                 rc = count;
 509         } else {
 510                 cfs_atomic_add(nrpages, &cache->ccc_lru_left);
 511         }
 512         return rc;
 513 }
 514
 515 static int ll_rd_checksum(char *page, char **start, off_t off,
 516                           int count, int *eof, void *data)
 517 {
 518         struct super_block *sb = data;
 519         struct ll_sb_info *sbi = ll_s2sbi(sb);
 520
 521         return snprintf(page, count, "%u\n",
 522                         (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 523 }
 524
 525 static int ll_wr_checksum(struct file *file, const char *buffer,
 526                           unsigned long count, void *data)
 527 {
 528         struct super_block *sb = data;
 529         struct ll_sb_info *sbi = ll_s2sbi(sb);
 530         int val, rc;
 531
 532         if (!sbi->ll_dt_exp)
 533                 /* Not set up yet */
 534                 return -EAGAIN;
 535
 536         rc = lprocfs_write_helper(buffer, count, &val);
 537         if (rc)
 538                 return rc;
 539         if (val)
 540                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 541         else
 542                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 543
 544         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 545                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 546         if (rc)
 547                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 548
 549         return count;
 550 }
 551
 552 static int ll_rd_max_rw_chunk(char *page, char **start, off_t off,
 553                           int count, int *eof, void *data)
 554 {
 555         struct super_block *sb = data;
 556
 557         return snprintf(page, count, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk);
 558 }
 559
 560 static int ll_wr_max_rw_chunk(struct file *file, const char *buffer,
 561                           unsigned long count, void *data)
 562 {
 563         struct super_block *sb = data;
 564         int rc, val;
 565
 566         rc = lprocfs_write_helper(buffer, count, &val);
 567         if (rc)
 568                 return rc;
 569         ll_s2sbi(sb)->ll_max_rw_chunk = val;
 570         return count;
 571 }
 572
 573 static int ll_rd_track_id(char *page, int count, void *data,
 574                           enum stats_track_type type)
 575 {
 576         struct super_block *sb = data;
 577
 578         if (ll_s2sbi(sb)->ll_stats_track_type == type) {
 579                 return snprintf(page, count, "%d\n",
 580                                 ll_s2sbi(sb)->ll_stats_track_id);
 581
 582         } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
 583                 return snprintf(page, count, "0 (all)\n");
 584         } else {
 585                 return snprintf(page, count, "untracked\n");
 586         }
 587 }
 588
 589 static int ll_wr_track_id(const char *buffer, unsigned long count, void *data,
 590                           enum stats_track_type type)
 591 {
 592         struct super_block *sb = data;
 593         int rc, pid;
 594
 595         rc = lprocfs_write_helper(buffer, count, &pid);
 596         if (rc)
 597                 return rc;
 598         ll_s2sbi(sb)->ll_stats_track_id = pid;
 599         if (pid == 0)
 600                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 601         else
 602                 ll_s2sbi(sb)->ll_stats_track_type = type;
 603         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 604         return count;
 605 }
 606
 607 static int ll_rd_track_pid(char *page, char **start, off_t off,
 608                           int count, int *eof, void *data)
 609 {
 610         return (ll_rd_track_id(page, count, data, STATS_TRACK_PID));
 611 }
 612
 613 static int ll_wr_track_pid(struct file *file, const char *buffer,
 614                           unsigned long count, void *data)
 615 {
 616         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PID));
 617 }
 618
 619 static int ll_rd_track_ppid(char *page, char **start, off_t off,
 620                           int count, int *eof, void *data)
 621 {
 622         return (ll_rd_track_id(page, count, data, STATS_TRACK_PPID));
 623 }
 624
 625 static int ll_wr_track_ppid(struct file *file, const char *buffer,
 626                           unsigned long count, void *data)
 627 {
 628         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_PPID));
 629 }
 630
 631 static int ll_rd_track_gid(char *page, char **start, off_t off,
 632                           int count, int *eof, void *data)
 633 {
 634         return (ll_rd_track_id(page, count, data, STATS_TRACK_GID));
 635 }
 636
 637 static int ll_wr_track_gid(struct file *file, const char *buffer,
 638                           unsigned long count, void *data)
 639 {
 640         return (ll_wr_track_id(buffer, count, data, STATS_TRACK_GID));
 641 }
 642
 643 static int ll_rd_statahead_max(char *page, char **start, off_t off,
 644                                int count, int *eof, void *data)
 645 {
 646         struct super_block *sb = data;
 647         struct ll_sb_info *sbi = ll_s2sbi(sb);
 648
 649         return snprintf(page, count, "%u\n", sbi->ll_sa_max);
 650 }
 651
 652 static int ll_wr_statahead_max(struct file *file, const char *buffer,
 653                                unsigned long count, void *data)
 654 {
 655         struct super_block *sb = data;
 656         struct ll_sb_info *sbi = ll_s2sbi(sb);
 657         int val, rc;
 658
 659         rc = lprocfs_write_helper(buffer, count, &val);
 660         if (rc)
 661                 return rc;
 662
 663         if (val >= 0 && val <= LL_SA_RPC_MAX)
 664                 sbi->ll_sa_max = val;
 665         else
 666                 CERROR("Bad statahead_max value %d. Valid values are in the "
 667                        "range [0, %d]\n", val, LL_SA_RPC_MAX);
 668
 669         return count;
 670 }
 671
 672 static int ll_rd_statahead_agl(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_AGL_ENABLED ? 1 : 0);
 680 }
 681
 682 static int ll_wr_statahead_agl(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_AGL_ENABLED;
 695         else
 696                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
 697
 698         return count;
 699 }
 700
 701 static int ll_rd_statahead_stats(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
 707         return snprintf(page, count,
 708                         "statahead total: %u\n"
 709                         "statahead wrong: %u\n"
 710                         "agl total: %u\n",
 711                         atomic_read(&sbi->ll_sa_total),
 712                         atomic_read(&sbi->ll_sa_wrong),
 713                         atomic_read(&sbi->ll_agl_total));
 714 }
 715
 716 static int ll_rd_lazystatfs(char *page, char **start, off_t off,
 717                             int count, int *eof, void *data)
 718 {
 719         struct super_block *sb = data;
 720         struct ll_sb_info *sbi = ll_s2sbi(sb);
 721
 722         return snprintf(page, count, "%u\n",
 723                         (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 724 }
 725
 726 static int ll_wr_lazystatfs(struct file *file, const char *buffer,
 727                             unsigned long count, void *data)
 728 {
 729         struct super_block *sb = data;
 730         struct ll_sb_info *sbi = ll_s2sbi(sb);
 731         int val, rc;
 732
 733         rc = lprocfs_write_helper(buffer, count, &val);
 734         if (rc)
 735                 return rc;
 736
 737         if (val)
 738                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 739         else
 740                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 741
 742         return count;
 743 }
 744
 745 static int ll_rd_maxea_size(char *page, char **start, off_t off,
 746                             int count, int *eof, void *data)
 747 {
 748         struct super_block *sb = data;
 749         struct ll_sb_info *sbi = ll_s2sbi(sb);
 750         unsigned int ealen;
 751         int rc;
 752
 753         rc = ll_get_max_mdsize(sbi, &ealen);
 754         if (rc)
 755                 return rc;
 756
 757         return snprintf(page, count, "%u\n", ealen);
 758 }
 759
 760 static int ll_rd_sbi_flags(char *page, char **start, off_t off,
 761                                 int count, int *eof, void *data)
 762 {
 763         const char *str[] = LL_SBI_FLAGS;
 764         struct super_block *sb = data;
 765         int flags = ll_s2sbi(sb)->ll_flags;
 766         int i = 0;
 767         int rc = 0;
 768
 769         while (flags != 0) {
 770                 if (ARRAY_SIZE(str) <= i) {
 771                         CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
 772                                 "flags please.\n", ll_get_fsname(sb, NULL, 0));
 773                         return -EINVAL;
 774                 }
 775
 776                 if (flags & 0x1)
 777                         rc += snprintf(page + rc, count - rc, "%s ", str[i]);
 778                 flags >>= 1;
 779                 ++i;
 780         }
 781         if (rc > 0)
 782                 rc += snprintf(page + rc, count - rc, "\b\n");
 783         return rc;
 784 }
 785
 786 static int ll_rd_unstable_stats(char *page, char **start, off_t off,
 787                               int count, int *eof, void *data)
 788 {
 789         struct super_block      *sb    = data;
 790         struct ll_sb_info       *sbi   = ll_s2sbi(sb);
 791         struct cl_client_cache  *cache = &sbi->ll_cache;
 792         int pages, mb, rc;
 793
 794         pages = cfs_atomic_read(&cache->ccc_unstable_nr);
 795         mb    = (pages * PAGE_CACHE_SIZE) >> 20;
 796
 797         rc = snprintf(page, count, "unstable_pages: %8d\n"
 798                                    "unstable_mb:    %8d\n", pages, mb);
 799
 800         return rc;
 801 }
 802
 803 static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 804         { "uuid",         ll_rd_sb_uuid,          0, 0 },
 805         //{ "mntpt_path",   ll_rd_path,             0, 0 },
 806         { "fstype",       ll_rd_fstype,           0, 0 },
 807         { "site",         ll_rd_site_stats,       0, 0 },
 808         { "blocksize",    ll_rd_blksize,          0, 0 },
 809         { "kbytestotal",  ll_rd_kbytestotal,      0, 0 },
 810         { "kbytesfree",   ll_rd_kbytesfree,       0, 0 },
 811         { "kbytesavail",  ll_rd_kbytesavail,      0, 0 },
 812         { "filestotal",   ll_rd_filestotal,       0, 0 },
 813         { "filesfree",    ll_rd_filesfree,        0, 0 },
 814         { "client_type",  ll_rd_client_type,      0, 0 },
 815         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
 816         { "max_read_ahead_mb", ll_rd_max_readahead_mb,
 817                                ll_wr_max_readahead_mb, 0 },
 818         { "max_read_ahead_per_file_mb", ll_rd_max_readahead_per_file_mb,
 819                                         ll_wr_max_readahead_per_file_mb, 0 },
 820         { "max_read_ahead_whole_mb", ll_rd_max_read_ahead_whole_mb,
 821                                      ll_wr_max_read_ahead_whole_mb, 0 },
 822         { "max_cached_mb",    ll_rd_max_cached_mb, ll_wr_max_cached_mb, 0 },
 823         { "checksum_pages",   ll_rd_checksum, ll_wr_checksum, 0 },
 824         { "max_rw_chunk",     ll_rd_max_rw_chunk, ll_wr_max_rw_chunk, 0 },
 825         { "stats_track_pid",  ll_rd_track_pid, ll_wr_track_pid, 0 },
 826         { "stats_track_ppid", ll_rd_track_ppid, ll_wr_track_ppid, 0 },
 827         { "stats_track_gid",  ll_rd_track_gid, ll_wr_track_gid, 0 },
 828         { "statahead_max",    ll_rd_statahead_max, ll_wr_statahead_max, 0 },
 829         { "statahead_agl",    ll_rd_statahead_agl, ll_wr_statahead_agl, 0 },
 830         { "statahead_stats",  ll_rd_statahead_stats, 0, 0 },
 831         { "lazystatfs",       ll_rd_lazystatfs, ll_wr_lazystatfs, 0 },
 832         { "max_easize",       ll_rd_maxea_size, 0, 0 },
 833         { "sbi_flags",        ll_rd_sbi_flags, 0, 0 },
 834         { "xattr_cache",      ll_rd_xattr_cache, ll_wr_xattr_cache, 0 },
 835         { "unstable_stats",   ll_rd_unstable_stats, 0, 0},
 836         { 0 }
 837 };
 838
 839 #define MAX_STRING_SIZE 128
 840
 841 struct llite_file_opcode {
 842         __u32       opcode;
 843         __u32       type;
 844         const char *opname;
 845 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 846         /* file operation */
 847         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 848         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 849         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 850                                    "read_bytes" },
 851         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 852                                    "write_bytes" },
 853         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 854                                    "brw_read" },
 855         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 856                                    "brw_write" },
 857         { LPROC_LL_OSC_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 858                                    "osc_read" },
 859         { LPROC_LL_OSC_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 860                                    "osc_write" },
 861         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
 862         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 863         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
 864         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
 865         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
 866         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
 867         { LPROC_LL_READDIR,        LPROCFS_TYPE_REGS, "readdir" },
 868         /* inode operation */
 869         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
 870         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "truncate" },
 871         { LPROC_LL_FLOCK,          LPROCFS_TYPE_REGS, "flock" },
 872         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
 873         /* dir inode operation */
 874         { LPROC_LL_CREATE,         LPROCFS_TYPE_REGS, "create" },
 875         { LPROC_LL_LINK,           LPROCFS_TYPE_REGS, "link" },
 876         { LPROC_LL_UNLINK,         LPROCFS_TYPE_REGS, "unlink" },
 877         { LPROC_LL_SYMLINK,        LPROCFS_TYPE_REGS, "symlink" },
 878         { LPROC_LL_MKDIR,          LPROCFS_TYPE_REGS, "mkdir" },
 879         { LPROC_LL_RMDIR,          LPROCFS_TYPE_REGS, "rmdir" },
 880         { LPROC_LL_MKNOD,          LPROCFS_TYPE_REGS, "mknod" },
 881         { LPROC_LL_RENAME,         LPROCFS_TYPE_REGS, "rename" },
 882         /* special inode operation */
 883         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
 884         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 885         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 886         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 887         { LPROC_LL_GETXATTR_HITS,  LPROCFS_TYPE_REGS, "getxattr_hits" },
 888         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
 889         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
 890         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
 891 };
 892
 893 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 894 {
 895         if (!sbi->ll_stats)
 896                 return;
 897         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 898                 lprocfs_counter_add(sbi->ll_stats, op, count);
 899         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
 900                  sbi->ll_stats_track_id == current->pid)
 901                 lprocfs_counter_add(sbi->ll_stats, op, count);
 902         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
 903                  sbi->ll_stats_track_id == current->parent->pid)
 904                 lprocfs_counter_add(sbi->ll_stats, op, count);
 905         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 906                  sbi->ll_stats_track_id == current_gid())
 907                 lprocfs_counter_add(sbi->ll_stats, op, count);
 908 }
 909 EXPORT_SYMBOL(ll_stats_ops_tally);
 910
 911 static const char *ra_stat_string[] = {
 912         [RA_STAT_HIT] = "hits",
 913         [RA_STAT_MISS] = "misses",
 914         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 915         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 916         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
 917         [RA_STAT_FAILED_MATCH] = "failed lock match",
 918         [RA_STAT_DISCARDED] = "read but discarded",
 919         [RA_STAT_ZERO_LEN] = "zero length file",
 920         [RA_STAT_ZERO_WINDOW] = "zero size window",
 921         [RA_STAT_EOF] = "read-ahead to EOF",
 922         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 923         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
 924 };
 925
 926
 927 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 928                                 struct super_block *sb, char *osc, char *mdc)
 929 {
 930         struct lprocfs_vars lvars[2];
 931         struct lustre_sb_info *lsi = s2lsi(sb);
 932         struct ll_sb_info *sbi = ll_s2sbi(sb);
 933         struct obd_device *obd;
 934         char name[MAX_STRING_SIZE + 1], *ptr;
 935         int err, id, len, rc;
 936         ENTRY;
 937
 938         memset(lvars, 0, sizeof(lvars));
 939
 940         name[MAX_STRING_SIZE] = '\0';
 941         lvars[0].name = name;
 942
 943         LASSERT(sbi != NULL);
 944         LASSERT(mdc != NULL);
 945         LASSERT(osc != NULL);
 946
 947         /* Get fsname */
 948         len = strlen(lsi->lsi_lmd->lmd_profile);
 949         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
 950         if (ptr && (strcmp(ptr, "-client") == 0))
 951                 len -= 7;
 952
 953         /* Mount info */
 954         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
 955                  lsi->lsi_lmd->lmd_profile, sb);
 956
 957         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 958         if (IS_ERR(sbi->ll_proc_root)) {
 959                 err = PTR_ERR(sbi->ll_proc_root);
 960                 sbi->ll_proc_root = NULL;
 961                 RETURN(err);
 962         }
 963
 964         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
 965                                 &vvp_dump_pgcache_file_ops, sbi);
 966         if (rc)
 967                 CWARN("Error adding the dump_page_cache file\n");
 968
 969         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
 970                                 &ll_rw_extents_stats_fops, sbi);
 971         if (rc)
 972                 CWARN("Error adding the extent_stats file\n");
 973
 974         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
 975                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
 976         if (rc)
 977                 CWARN("Error adding the extents_stats_per_process file\n");
 978
 979         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
 980                                 &ll_rw_offset_stats_fops, sbi);
 981         if (rc)
 982                 CWARN("Error adding the offset_stats file\n");
 983
 984         /* File operations stats */
 985         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
 986                                             LPROCFS_STATS_FLAG_NONE);
 987         if (sbi->ll_stats == NULL)
 988                 GOTO(out, err = -ENOMEM);
 989         /* do counter init */
 990         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 991                 __u32 type = llite_opcode_table[id].type;
 992                 void *ptr = NULL;
 993                 if (type & LPROCFS_TYPE_REGS)
 994                         ptr = "regs";
 995                 else if (type & LPROCFS_TYPE_BYTES)
 996                         ptr = "bytes";
 997                 else if (type & LPROCFS_TYPE_PAGES)
 998                         ptr = "pages";
 999                 lprocfs_counter_init(sbi->ll_stats,
1000                                      llite_opcode_table[id].opcode,
1001                                      (type & LPROCFS_CNTR_AVGMINMAX),
1002                                      llite_opcode_table[id].opname, ptr);
1003         }
1004         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
1005         if (err)
1006                 GOTO(out, err);
1007
1008         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1009                                                LPROCFS_STATS_FLAG_NONE);
1010         if (sbi->ll_ra_stats == NULL)
1011                 GOTO(out, err = -ENOMEM);
1012
1013         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1014                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
1015                                      ra_stat_string[id], "pages");
1016         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
1017                                      sbi->ll_ra_stats);
1018         if (err)
1019                 GOTO(out, err);
1020
1021
1022         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
1023         if (err)
1024                 GOTO(out, err);
1025
1026         /* MDC info */
1027         obd = class_name2obd(mdc);
1028
1029         LASSERT(obd != NULL);
1030         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1031         LASSERT(obd->obd_type->typ_name != NULL);
1032
1033         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
1034                  obd->obd_type->typ_name);
1035         lvars[0].read_fptr = lprocfs_rd_name;
1036         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
1037         if (err)
1038                 GOTO(out, err);
1039
1040         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
1041         lvars[0].read_fptr = lprocfs_rd_uuid;
1042         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
1043         if (err)
1044                 GOTO(out, err);
1045
1046         /* OSC */
1047         obd = class_name2obd(osc);
1048
1049         LASSERT(obd != NULL);
1050         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1051         LASSERT(obd->obd_type->typ_name != NULL);
1052
1053         snprintf(name, MAX_STRING_SIZE, "%s/common_name",
1054                  obd->obd_type->typ_name);
1055         lvars[0].read_fptr = lprocfs_rd_name;
1056         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
1057         if (err)
1058                 GOTO(out, err);
1059
1060         snprintf(name, MAX_STRING_SIZE, "%s/uuid", obd->obd_type->typ_name);
1061         lvars[0].read_fptr = lprocfs_rd_uuid;
1062         err = lprocfs_add_vars(sbi->ll_proc_root, lvars, obd);
1063 out:
1064         if (err) {
1065                 lprocfs_remove(&sbi->ll_proc_root);
1066                 lprocfs_free_stats(&sbi->ll_ra_stats);
1067                 lprocfs_free_stats(&sbi->ll_stats);
1068         }
1069         RETURN(err);
1070 }
1071
1072 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
1073 {
1074         if (sbi->ll_proc_root) {
1075                 lprocfs_remove(&sbi->ll_proc_root);
1076                 lprocfs_free_stats(&sbi->ll_ra_stats);
1077                 lprocfs_free_stats(&sbi->ll_stats);
1078         }
1079 }
1080 #undef MAX_STRING_SIZE
1081
1082 #define pct(a,b) (b ? a * 100 / b : 0)
1083
1084 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1085                                    struct seq_file *seq, int which)
1086 {
1087         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1088         unsigned long start, end, r, w;
1089         char *unitp = "KMGTPEZY";
1090         int i, units = 10;
1091         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1092
1093         read_cum = 0;
1094         write_cum = 0;
1095         start = 0;
1096
1097         for(i = 0; i < LL_HIST_MAX; i++) {
1098                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1099                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1100         }
1101
1102         for(i = 0; i < LL_HIST_MAX; i++) {
1103                 r = pp_info->pp_r_hist.oh_buckets[i];
1104                 w = pp_info->pp_w_hist.oh_buckets[i];
1105                 read_cum += r;
1106                 write_cum += w;
1107                 end = 1 << (i + LL_HIST_START - units);
1108                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
1109                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
1110                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1111                            r, pct(r, read_tot), pct(read_cum, read_tot),
1112                            w, pct(w, write_tot), pct(write_cum, write_tot));
1113                 start = end;
1114                 if (start == 1<<10) {
1115                         start = 1;
1116                         units += 10;
1117                         unitp++;
1118                 }
1119                 if (read_cum == read_tot && write_cum == write_tot)
1120                         break;
1121         }
1122 }
1123
1124 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1125 {
1126         struct timeval now;
1127         struct ll_sb_info *sbi = seq->private;
1128         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1129         int k;
1130
1131         do_gettimeofday(&now);
1132
1133         if (!sbi->ll_rw_stats_on) {
1134                 seq_printf(seq, "disabled\n"
1135                                 "write anything in this file to activate, "
1136                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1137                 return 0;
1138         }
1139         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1140                    now.tv_sec, now.tv_usec);
1141         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1142         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1143                    "extents", "calls", "%", "cum%",
1144                    "calls", "%", "cum%");
1145         spin_lock(&sbi->ll_pp_extent_lock);
1146         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1147                 if (io_extents->pp_extents[k].pid != 0) {
1148                         seq_printf(seq, "\nPID: %d\n",
1149                                    io_extents->pp_extents[k].pid);
1150                         ll_display_extents_info(io_extents, seq, k);
1151                 }
1152         }
1153         spin_unlock(&sbi->ll_pp_extent_lock);
1154         return 0;
1155 }
1156
1157 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1158                                                 const char *buf, size_t len,
1159                                                 loff_t *off)
1160 {
1161         struct seq_file *seq = file->private_data;
1162         struct ll_sb_info *sbi = seq->private;
1163         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1164         int i;
1165         int value = 1, rc = 0;
1166
1167         rc = lprocfs_write_helper(buf, len, &value);
1168         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1169                        strcmp(buf, "Disabled") == 0))
1170                 value = 0;
1171
1172         if (value == 0)
1173                 sbi->ll_rw_stats_on = 0;
1174         else
1175                 sbi->ll_rw_stats_on = 1;
1176
1177         spin_lock(&sbi->ll_pp_extent_lock);
1178         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1179                 io_extents->pp_extents[i].pid = 0;
1180                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1181                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1182         }
1183         spin_unlock(&sbi->ll_pp_extent_lock);
1184         return len;
1185 }
1186
1187 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1188
1189 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1190 {
1191         struct timeval now;
1192         struct ll_sb_info *sbi = seq->private;
1193         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1194
1195         do_gettimeofday(&now);
1196
1197         if (!sbi->ll_rw_stats_on) {
1198                 seq_printf(seq, "disabled\n"
1199                                 "write anything in this file to activate, "
1200                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1201                 return 0;
1202         }
1203         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1204                    now.tv_sec, now.tv_usec);
1205
1206         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1207         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1208                    "extents", "calls", "%", "cum%",
1209                    "calls", "%", "cum%");
1210         spin_lock(&sbi->ll_lock);
1211         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1212         spin_unlock(&sbi->ll_lock);
1213
1214         return 0;
1215 }
1216
1217 static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf,
1218                                         size_t len, loff_t *off)
1219 {
1220         struct seq_file *seq = file->private_data;
1221         struct ll_sb_info *sbi = seq->private;
1222         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1223         int i;
1224         int value = 1, rc = 0;
1225
1226         rc = lprocfs_write_helper(buf, len, &value);
1227         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1228                        strcmp(buf, "Disabled") == 0))
1229                 value = 0;
1230
1231         if (value == 0)
1232                 sbi->ll_rw_stats_on = 0;
1233         else
1234                 sbi->ll_rw_stats_on = 1;
1235         spin_lock(&sbi->ll_pp_extent_lock);
1236         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1237                 io_extents->pp_extents[i].pid = 0;
1238                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1239                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1240         }
1241         spin_unlock(&sbi->ll_pp_extent_lock);
1242
1243         return len;
1244 }
1245
1246 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1247
1248 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1249                        struct ll_file_data *file, loff_t pos,
1250                        size_t count, int rw)
1251 {
1252         int i, cur = -1;
1253         struct ll_rw_process_info *process;
1254         struct ll_rw_process_info *offset;
1255         int *off_count = &sbi->ll_rw_offset_entry_count;
1256         int *process_count = &sbi->ll_offset_process_count;
1257         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1258
1259         if(!sbi->ll_rw_stats_on)
1260                 return;
1261         process = sbi->ll_rw_process_info;
1262         offset = sbi->ll_rw_offset_info;
1263
1264         spin_lock(&sbi->ll_pp_extent_lock);
1265         /* Extent statistics */
1266         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1267                 if(io_extents->pp_extents[i].pid == pid) {
1268                         cur = i;
1269                         break;
1270                 }
1271         }
1272
1273         if (cur == -1) {
1274                 /* new process */
1275                 sbi->ll_extent_process_count =
1276                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1277                 cur = sbi->ll_extent_process_count;
1278                 io_extents->pp_extents[cur].pid = pid;
1279                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1280                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1281         }
1282
1283         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1284              (i < (LL_HIST_MAX - 1)); i++);
1285         if (rw == 0) {
1286                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1287                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1288         } else {
1289                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1290                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1291         }
1292         spin_unlock(&sbi->ll_pp_extent_lock);
1293
1294         spin_lock(&sbi->ll_process_lock);
1295         /* Offset statistics */
1296         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1297                 if (process[i].rw_pid == pid) {
1298                         if (process[i].rw_last_file != file) {
1299                                 process[i].rw_range_start = pos;
1300                                 process[i].rw_last_file_pos = pos + count;
1301                                 process[i].rw_smallest_extent = count;
1302                                 process[i].rw_largest_extent = count;
1303                                 process[i].rw_offset = 0;
1304                                 process[i].rw_last_file = file;
1305                                 spin_unlock(&sbi->ll_process_lock);
1306                                 return;
1307                         }
1308                         if (process[i].rw_last_file_pos != pos) {
1309                                 *off_count =
1310                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1311                                 offset[*off_count].rw_op = process[i].rw_op;
1312                                 offset[*off_count].rw_pid = pid;
1313                                 offset[*off_count].rw_range_start =
1314                                         process[i].rw_range_start;
1315                                 offset[*off_count].rw_range_end =
1316                                         process[i].rw_last_file_pos;
1317                                 offset[*off_count].rw_smallest_extent =
1318                                         process[i].rw_smallest_extent;
1319                                 offset[*off_count].rw_largest_extent =
1320                                         process[i].rw_largest_extent;
1321                                 offset[*off_count].rw_offset =
1322                                         process[i].rw_offset;
1323                                 process[i].rw_op = rw;
1324                                 process[i].rw_range_start = pos;
1325                                 process[i].rw_smallest_extent = count;
1326                                 process[i].rw_largest_extent = count;
1327                                 process[i].rw_offset = pos -
1328                                         process[i].rw_last_file_pos;
1329                         }
1330                         if(process[i].rw_smallest_extent > count)
1331                                 process[i].rw_smallest_extent = count;
1332                         if(process[i].rw_largest_extent < count)
1333                                 process[i].rw_largest_extent = count;
1334                         process[i].rw_last_file_pos = pos + count;
1335                         spin_unlock(&sbi->ll_process_lock);
1336                         return;
1337                 }
1338         }
1339         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1340         process[*process_count].rw_pid = pid;
1341         process[*process_count].rw_op = rw;
1342         process[*process_count].rw_range_start = pos;
1343         process[*process_count].rw_last_file_pos = pos + count;
1344         process[*process_count].rw_smallest_extent = count;
1345         process[*process_count].rw_largest_extent = count;
1346         process[*process_count].rw_offset = 0;
1347         process[*process_count].rw_last_file = file;
1348         spin_unlock(&sbi->ll_process_lock);
1349 }
1350
1351 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1352 {
1353         struct timeval now;
1354         struct ll_sb_info *sbi = seq->private;
1355         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1356         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1357         int i;
1358
1359         do_gettimeofday(&now);
1360
1361         if (!sbi->ll_rw_stats_on) {
1362                 seq_printf(seq, "disabled\n"
1363                                 "write anything in this file to activate, "
1364                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1365                 return 0;
1366         }
1367         spin_lock(&sbi->ll_process_lock);
1368
1369         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1370                    now.tv_sec, now.tv_usec);
1371         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1372                    "R/W", "PID", "RANGE START", "RANGE END",
1373                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1374
1375         /* We stored the discontiguous offsets here; print them first */
1376         for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1377                 if (offset[i].rw_pid != 0)
1378                         seq_printf(seq,
1379                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1380                                    offset[i].rw_op == READ ? 'R' : 'W',
1381                                    offset[i].rw_pid,
1382                                    offset[i].rw_range_start,
1383                                    offset[i].rw_range_end,
1384                                    (unsigned long)offset[i].rw_smallest_extent,
1385                                    (unsigned long)offset[i].rw_largest_extent,
1386                                    offset[i].rw_offset);
1387         }
1388
1389         /* Then print the current offsets for each process */
1390         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1391                 if (process[i].rw_pid != 0)
1392                         seq_printf(seq,
1393                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1394                                    process[i].rw_op == READ ? 'R' : 'W',
1395                                    process[i].rw_pid,
1396                                    process[i].rw_range_start,
1397                                    process[i].rw_last_file_pos,
1398                                    (unsigned long)process[i].rw_smallest_extent,
1399                                    (unsigned long)process[i].rw_largest_extent,
1400                                    process[i].rw_offset);
1401         }
1402         spin_unlock(&sbi->ll_process_lock);
1403
1404         return 0;
1405 }
1406
1407 static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf,
1408                                        size_t len, loff_t *off)
1409 {
1410         struct seq_file *seq = file->private_data;
1411         struct ll_sb_info *sbi = seq->private;
1412         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1413         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1414         int value = 1, rc = 0;
1415
1416         rc = lprocfs_write_helper(buf, len, &value);
1417
1418         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1419                            strcmp(buf, "Disabled") == 0))
1420                 value = 0;
1421
1422         if (value == 0)
1423                 sbi->ll_rw_stats_on = 0;
1424         else
1425                 sbi->ll_rw_stats_on = 1;
1426
1427         spin_lock(&sbi->ll_process_lock);
1428         sbi->ll_offset_process_count = 0;
1429         sbi->ll_rw_offset_entry_count = 0;
1430         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1431                LL_PROCESS_HIST_MAX);
1432         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1433                LL_OFFSET_HIST_MAX);
1434         spin_unlock(&sbi->ll_process_lock);
1435
1436         return len;
1437 }
1438
1439 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1440
1441 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
1442 {
1443     lvars->module_vars  = NULL;
1444     lvars->obd_vars     = lprocfs_llite_obd_vars;
1445 }
1446 #endif /* LPROCFS */