drivers/staging/lustre/lustre/llite/lproc_llite.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36 #define DEBUG_SUBSYSTEM S_LLITE
  37
  38 #include <linux/version.h>
  39 #include <lustre_lite.h>
  40 #include <lprocfs_status.h>
  41 #include <linux/seq_file.h>
  42 #include <obd_support.h>
  43
  44 #include "llite_internal.h"
  45
  46 struct proc_dir_entry *proc_lustre_fs_root;
  47
  48 #ifdef LPROCFS
  49 /* /proc/lustre/llite mount point registration */
  50 extern struct file_operations vvp_dump_pgcache_file_ops;
  51 struct file_operations ll_rw_extents_stats_fops;
  52 struct file_operations ll_rw_extents_stats_pp_fops;
  53 struct file_operations ll_rw_offset_stats_fops;
  54
  55 static int ll_blksize_seq_show(struct seq_file *m, void *v)
  56 {
  57         struct super_block *sb = (struct super_block *)m->private;
  58         struct obd_statfs osfs;
  59         int rc;
  60
  61         LASSERT(sb != NULL);
  62         rc = ll_statfs_internal(sb, &osfs,
  63                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  64                                 OBD_STATFS_NODELAY);
  65         if (!rc)
  66               rc = seq_printf(m, "%u\n", osfs.os_bsize);
  67
  68         return rc;
  69 }
  70 LPROC_SEQ_FOPS_RO(ll_blksize);
  71
  72 static int ll_kbytestotal_seq_show(struct seq_file *m, void *v)
  73 {
  74         struct super_block *sb = (struct super_block *)m->private;
  75         struct obd_statfs osfs;
  76         int rc;
  77
  78         LASSERT(sb != NULL);
  79         rc = ll_statfs_internal(sb, &osfs,
  80                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  81                                 OBD_STATFS_NODELAY);
  82         if (!rc) {
  83                 __u32 blk_size = osfs.os_bsize >> 10;
  84                 __u64 result = osfs.os_blocks;
  85
  86                 while (blk_size >>= 1)
  87                         result <<= 1;
  88
  89                 rc = seq_printf(m, LPU64"\n", result);
  90         }
  91         return rc;
  92 }
  93 LPROC_SEQ_FOPS_RO(ll_kbytestotal);
  94
  95 static int ll_kbytesfree_seq_show(struct seq_file *m, void *v)
  96 {
  97         struct super_block *sb = (struct super_block *)m->private;
  98         struct obd_statfs osfs;
  99         int rc;
 100
 101         LASSERT(sb != NULL);
 102         rc = ll_statfs_internal(sb, &osfs,
 103                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 104                                 OBD_STATFS_NODELAY);
 105         if (!rc) {
 106                 __u32 blk_size = osfs.os_bsize >> 10;
 107                 __u64 result = osfs.os_bfree;
 108
 109                 while (blk_size >>= 1)
 110                         result <<= 1;
 111
 112                 rc = seq_printf(m, LPU64"\n", result);
 113         }
 114         return rc;
 115 }
 116 LPROC_SEQ_FOPS_RO(ll_kbytesfree);
 117
 118 static int ll_kbytesavail_seq_show(struct seq_file *m, void *v)
 119 {
 120         struct super_block *sb = (struct super_block *)m->private;
 121         struct obd_statfs osfs;
 122         int rc;
 123
 124         LASSERT(sb != NULL);
 125         rc = ll_statfs_internal(sb, &osfs,
 126                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 127                                 OBD_STATFS_NODELAY);
 128         if (!rc) {
 129                 __u32 blk_size = osfs.os_bsize >> 10;
 130                 __u64 result = osfs.os_bavail;
 131
 132                 while (blk_size >>= 1)
 133                         result <<= 1;
 134
 135                 rc = seq_printf(m, LPU64"\n", result);
 136         }
 137         return rc;
 138 }
 139 LPROC_SEQ_FOPS_RO(ll_kbytesavail);
 140
 141 static int ll_filestotal_seq_show(struct seq_file *m, void *v)
 142 {
 143         struct super_block *sb = (struct super_block *)m->private;
 144         struct obd_statfs osfs;
 145         int rc;
 146
 147         LASSERT(sb != NULL);
 148         rc = ll_statfs_internal(sb, &osfs,
 149                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 150                                 OBD_STATFS_NODELAY);
 151         if (!rc)
 152                  rc = seq_printf(m, LPU64"\n", osfs.os_files);
 153         return rc;
 154 }
 155 LPROC_SEQ_FOPS_RO(ll_filestotal);
 156
 157 static int ll_filesfree_seq_show(struct seq_file *m, void *v)
 158 {
 159         struct super_block *sb = (struct super_block *)m->private;
 160         struct obd_statfs osfs;
 161         int rc;
 162
 163         LASSERT(sb != NULL);
 164         rc = ll_statfs_internal(sb, &osfs,
 165                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 166                                 OBD_STATFS_NODELAY);
 167         if (!rc)
 168                  rc = seq_printf(m, LPU64"\n", osfs.os_ffree);
 169         return rc;
 170 }
 171 LPROC_SEQ_FOPS_RO(ll_filesfree);
 172
 173 static int ll_client_type_seq_show(struct seq_file *m, void *v)
 174 {
 175         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 176         int rc;
 177
 178         LASSERT(sbi != NULL);
 179
 180         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 181                 rc = seq_printf(m, "remote client\n");
 182         else
 183                 rc = seq_printf(m, "local client\n");
 184
 185         return rc;
 186 }
 187 LPROC_SEQ_FOPS_RO(ll_client_type);
 188
 189 static int ll_fstype_seq_show(struct seq_file *m, void *v)
 190 {
 191         struct super_block *sb = (struct super_block *)m->private;
 192
 193         LASSERT(sb != NULL);
 194         return seq_printf(m, "%s\n", sb->s_type->name);
 195 }
 196 LPROC_SEQ_FOPS_RO(ll_fstype);
 197
 198 static int ll_sb_uuid_seq_show(struct seq_file *m, void *v)
 199 {
 200         struct super_block *sb = (struct super_block *)m->private;
 201
 202         LASSERT(sb != NULL);
 203         return seq_printf(m, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
 204 }
 205 LPROC_SEQ_FOPS_RO(ll_sb_uuid);
 206
 207 static int ll_site_stats_seq_show(struct seq_file *m, void *v)
 208 {
 209         struct super_block *sb = m->private;
 210
 211         /*
 212          * See description of statistical counters in struct cl_site, and
 213          * struct lu_site.
 214          */
 215         return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site), m);
 216 }
 217 LPROC_SEQ_FOPS_RO(ll_site_stats);
 218
 219 static int ll_max_readahead_mb_seq_show(struct seq_file *m, void *v)
 220 {
 221         struct super_block *sb = m->private;
 222         struct ll_sb_info *sbi = ll_s2sbi(sb);
 223         long pages_number;
 224         int mult;
 225
 226         spin_lock(&sbi->ll_lock);
 227         pages_number = sbi->ll_ra_info.ra_max_pages;
 228         spin_unlock(&sbi->ll_lock);
 229
 230         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 231         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 232 }
 233
 234 static ssize_t ll_max_readahead_mb_seq_write(struct file *file, const char *buffer,
 235                                          size_t count, loff_t *off)
 236 {
 237         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 238         struct ll_sb_info *sbi = ll_s2sbi(sb);
 239         int mult, rc, pages_number;
 240
 241         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 242         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 243         if (rc)
 244                 return rc;
 245
 246         if (pages_number < 0 || pages_number > totalram_pages / 2) {
 247                 CERROR("can't set file readahead more than %lu MB\n",
 248                        totalram_pages >> (20 - PAGE_CACHE_SHIFT + 1)); /*1/2 of RAM*/
 249                 return -ERANGE;
 250         }
 251
 252         spin_lock(&sbi->ll_lock);
 253         sbi->ll_ra_info.ra_max_pages = pages_number;
 254         spin_unlock(&sbi->ll_lock);
 255
 256         return count;
 257 }
 258 LPROC_SEQ_FOPS(ll_max_readahead_mb);
 259
 260 static int ll_max_readahead_per_file_mb_seq_show(struct seq_file *m, void *v)
 261 {
 262         struct super_block *sb = m->private;
 263         struct ll_sb_info *sbi = ll_s2sbi(sb);
 264         long pages_number;
 265         int mult;
 266
 267         spin_lock(&sbi->ll_lock);
 268         pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
 269         spin_unlock(&sbi->ll_lock);
 270
 271         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 272         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 273 }
 274
 275 static ssize_t ll_max_readahead_per_file_mb_seq_write(struct file *file,
 276                                                   const char *buffer,
 277                                                   size_t count, loff_t *off)
 278 {
 279         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 280         struct ll_sb_info *sbi = ll_s2sbi(sb);
 281         int mult, rc, pages_number;
 282
 283         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 284         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 285         if (rc)
 286                 return rc;
 287
 288         if (pages_number < 0 ||
 289                 pages_number > sbi->ll_ra_info.ra_max_pages) {
 290                 CERROR("can't set file readahead more than"
 291                        "max_read_ahead_mb %lu MB\n",
 292                        sbi->ll_ra_info.ra_max_pages);
 293                 return -ERANGE;
 294         }
 295
 296         spin_lock(&sbi->ll_lock);
 297         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 298         spin_unlock(&sbi->ll_lock);
 299
 300         return count;
 301 }
 302 LPROC_SEQ_FOPS(ll_max_readahead_per_file_mb);
 303
 304 static int ll_max_read_ahead_whole_mb_seq_show(struct seq_file *m, void *unused)
 305 {
 306         struct super_block *sb = m->private;
 307         struct ll_sb_info *sbi = ll_s2sbi(sb);
 308         long pages_number;
 309         int mult;
 310
 311         spin_lock(&sbi->ll_lock);
 312         pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
 313         spin_unlock(&sbi->ll_lock);
 314
 315         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 316         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 317 }
 318
 319 static ssize_t ll_max_read_ahead_whole_mb_seq_write(struct file *file,
 320                                                 const char *buffer,
 321                                                 size_t count, loff_t *off)
 322 {
 323         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 324         struct ll_sb_info *sbi = ll_s2sbi(sb);
 325         int mult, rc, pages_number;
 326
 327         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 328         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 329         if (rc)
 330                 return rc;
 331
 332         /* Cap this at the current max readahead window size, the readahead
 333          * algorithm does this anyway so it's pointless to set it larger. */
 334         if (pages_number < 0 ||
 335             pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
 336                 CERROR("can't set max_read_ahead_whole_mb more than "
 337                        "max_read_ahead_per_file_mb: %lu\n",
 338                         sbi->ll_ra_info.ra_max_pages_per_file >> (20 - PAGE_CACHE_SHIFT));
 339                 return -ERANGE;
 340         }
 341
 342         spin_lock(&sbi->ll_lock);
 343         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 344         spin_unlock(&sbi->ll_lock);
 345
 346         return count;
 347 }
 348 LPROC_SEQ_FOPS(ll_max_read_ahead_whole_mb);
 349
 350 static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v)
 351 {
 352         struct super_block     *sb    = m->private;
 353         struct ll_sb_info      *sbi   = ll_s2sbi(sb);
 354         struct cl_client_cache *cache = &sbi->ll_cache;
 355         int shift = 20 - PAGE_CACHE_SHIFT;
 356         int max_cached_mb;
 357         int unused_mb;
 358
 359         max_cached_mb = cache->ccc_lru_max >> shift;
 360         unused_mb = atomic_read(&cache->ccc_lru_left) >> shift;
 361         return seq_printf(m,
 362                         "users: %d\n"
 363                         "max_cached_mb: %d\n"
 364                         "used_mb: %d\n"
 365                         "unused_mb: %d\n"
 366                         "reclaim_count: %u\n",
 367                         atomic_read(&cache->ccc_users),
 368                         max_cached_mb,
 369                         max_cached_mb - unused_mb,
 370                         unused_mb,
 371                         cache->ccc_lru_shrinkers);
 372 }
 373
 374 static ssize_t ll_max_cached_mb_seq_write(struct file *file, const char *buffer,
 375                                       size_t count, loff_t *off)
 376 {
 377         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 378         struct ll_sb_info *sbi = ll_s2sbi(sb);
 379         struct cl_client_cache *cache = &sbi->ll_cache;
 380         int mult, rc, pages_number;
 381         int diff = 0;
 382         int nrpages = 0;
 383         ENTRY;
 384
 385         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 386         buffer = lprocfs_find_named_value(buffer, "max_cached_mb:", &count);
 387         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 388         if (rc)
 389                 RETURN(rc);
 390
 391         if (pages_number < 0 || pages_number > totalram_pages) {
 392                 CERROR("%s: can't set max cache more than %lu MB\n",
 393                        ll_get_fsname(sb, NULL, 0),
 394                        totalram_pages >> (20 - PAGE_CACHE_SHIFT));
 395                 RETURN(-ERANGE);
 396         }
 397
 398         if (sbi->ll_dt_exp == NULL)
 399                 RETURN(-ENODEV);
 400
 401         spin_lock(&sbi->ll_lock);
 402         diff = pages_number - cache->ccc_lru_max;
 403         spin_unlock(&sbi->ll_lock);
 404
 405         /* easy - add more LRU slots. */
 406         if (diff >= 0) {
 407                 atomic_add(diff, &cache->ccc_lru_left);
 408                 GOTO(out, rc = 0);
 409         }
 410
 411         diff = -diff;
 412         while (diff > 0) {
 413                 int tmp;
 414
 415                 /* reduce LRU budget from free slots. */
 416                 do {
 417                         int ov, nv;
 418
 419                         ov = atomic_read(&cache->ccc_lru_left);
 420                         if (ov == 0)
 421                                 break;
 422
 423                         nv = ov > diff ? ov - diff : 0;
 424                         rc = cfs_atomic_cmpxchg(&cache->ccc_lru_left, ov, nv);
 425                         if (likely(ov == rc)) {
 426                                 diff -= ov - nv;
 427                                 nrpages += ov - nv;
 428                                 break;
 429                         }
 430                 } while (1);
 431
 432                 if (diff <= 0)
 433                         break;
 434
 435                 /* difficult - have to ask OSCs to drop LRU slots. */
 436                 tmp = diff << 1;
 437                 rc = obd_set_info_async(NULL, sbi->ll_dt_exp,
 438                                 sizeof(KEY_CACHE_LRU_SHRINK),
 439                                 KEY_CACHE_LRU_SHRINK,
 440                                 sizeof(tmp), &tmp, NULL);
 441                 if (rc < 0)
 442                         break;
 443         }
 444
 445 out:
 446         if (rc >= 0) {
 447                 spin_lock(&sbi->ll_lock);
 448                 cache->ccc_lru_max = pages_number;
 449                 spin_unlock(&sbi->ll_lock);
 450                 rc = count;
 451         } else {
 452                 atomic_add(nrpages, &cache->ccc_lru_left);
 453         }
 454         return rc;
 455 }
 456 LPROC_SEQ_FOPS(ll_max_cached_mb);
 457
 458 static int ll_checksum_seq_show(struct seq_file *m, void *v)
 459 {
 460         struct super_block *sb = m->private;
 461         struct ll_sb_info *sbi = ll_s2sbi(sb);
 462
 463         return seq_printf(m, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 464 }
 465
 466 static ssize_t ll_checksum_seq_write(struct file *file, const char *buffer,
 467                                  size_t count, loff_t *off)
 468 {
 469         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 470         struct ll_sb_info *sbi = ll_s2sbi(sb);
 471         int val, rc;
 472
 473         if (!sbi->ll_dt_exp)
 474                 /* Not set up yet */
 475                 return -EAGAIN;
 476
 477         rc = lprocfs_write_helper(buffer, count, &val);
 478         if (rc)
 479                 return rc;
 480         if (val)
 481                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 482         else
 483                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 484
 485         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 486                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 487         if (rc)
 488                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 489
 490         return count;
 491 }
 492 LPROC_SEQ_FOPS(ll_checksum);
 493
 494 static int ll_max_rw_chunk_seq_show(struct seq_file *m, void *v)
 495 {
 496         struct super_block *sb = m->private;
 497
 498         return seq_printf(m, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk);
 499 }
 500
 501 static ssize_t ll_max_rw_chunk_seq_write(struct file *file, const char *buffer,
 502                                      size_t count, loff_t *off)
 503 {
 504         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 505         int rc, val;
 506
 507         rc = lprocfs_write_helper(buffer, count, &val);
 508         if (rc)
 509                 return rc;
 510         ll_s2sbi(sb)->ll_max_rw_chunk = val;
 511         return count;
 512 }
 513 LPROC_SEQ_FOPS(ll_max_rw_chunk);
 514
 515 static int ll_rd_track_id(struct seq_file *m, enum stats_track_type type)
 516 {
 517         struct super_block *sb = m->private;
 518
 519         if (ll_s2sbi(sb)->ll_stats_track_type == type) {
 520                 return seq_printf(m, "%d\n",
 521                                 ll_s2sbi(sb)->ll_stats_track_id);
 522
 523         } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
 524                 return seq_printf(m, "0 (all)\n");
 525         } else {
 526                 return seq_printf(m, "untracked\n");
 527         }
 528 }
 529
 530 static int ll_wr_track_id(const char *buffer, unsigned long count, void *data,
 531                           enum stats_track_type type)
 532 {
 533         struct super_block *sb = data;
 534         int rc, pid;
 535
 536         rc = lprocfs_write_helper(buffer, count, &pid);
 537         if (rc)
 538                 return rc;
 539         ll_s2sbi(sb)->ll_stats_track_id = pid;
 540         if (pid == 0)
 541                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 542         else
 543                 ll_s2sbi(sb)->ll_stats_track_type = type;
 544         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 545         return count;
 546 }
 547
 548 static int ll_track_pid_seq_show(struct seq_file *m, void *v)
 549 {
 550         return ll_rd_track_id(m, STATS_TRACK_PID);
 551 }
 552
 553 static ssize_t ll_track_pid_seq_write(struct file *file, const char *buffer,
 554                                   size_t count, loff_t *off)
 555 {
 556         struct seq_file *seq = file->private_data;
 557         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PID);
 558 }
 559 LPROC_SEQ_FOPS(ll_track_pid);
 560
 561 static int ll_track_ppid_seq_show(struct seq_file *m, void *v)
 562 {
 563         return ll_rd_track_id(m, STATS_TRACK_PPID);
 564 }
 565
 566 static ssize_t ll_track_ppid_seq_write(struct file *file, const char *buffer,
 567                                    size_t count, loff_t *off)
 568 {
 569         struct seq_file *seq = file->private_data;
 570         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PPID);
 571 }
 572 LPROC_SEQ_FOPS(ll_track_ppid);
 573
 574 static int ll_track_gid_seq_show(struct seq_file *m, void *v)
 575 {
 576         return ll_rd_track_id(m, STATS_TRACK_GID);
 577 }
 578
 579 static ssize_t ll_track_gid_seq_write(struct file *file, const char *buffer,
 580                                   size_t count, loff_t *off)
 581 {
 582         struct seq_file *seq = file->private_data;
 583         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_GID);
 584 }
 585 LPROC_SEQ_FOPS(ll_track_gid);
 586
 587 static int ll_statahead_max_seq_show(struct seq_file *m, void *v)
 588 {
 589         struct super_block *sb = m->private;
 590         struct ll_sb_info *sbi = ll_s2sbi(sb);
 591
 592         return seq_printf(m, "%u\n", sbi->ll_sa_max);
 593 }
 594
 595 static ssize_t ll_statahead_max_seq_write(struct file *file, const char *buffer,
 596                                       size_t count, loff_t *off)
 597 {
 598         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 599         struct ll_sb_info *sbi = ll_s2sbi(sb);
 600         int val, rc;
 601
 602         rc = lprocfs_write_helper(buffer, count, &val);
 603         if (rc)
 604                 return rc;
 605
 606         if (val >= 0 && val <= LL_SA_RPC_MAX)
 607                 sbi->ll_sa_max = val;
 608         else
 609                 CERROR("Bad statahead_max value %d. Valid values are in the "
 610                        "range [0, %d]\n", val, LL_SA_RPC_MAX);
 611
 612         return count;
 613 }
 614 LPROC_SEQ_FOPS(ll_statahead_max);
 615
 616 static int ll_statahead_agl_seq_show(struct seq_file *m, void *v)
 617 {
 618         struct super_block *sb = m->private;
 619         struct ll_sb_info *sbi = ll_s2sbi(sb);
 620
 621         return seq_printf(m, "%u\n",
 622                         sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
 623 }
 624
 625 static ssize_t ll_statahead_agl_seq_write(struct file *file, const char *buffer,
 626                                       size_t count, loff_t *off)
 627 {
 628         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 629         struct ll_sb_info *sbi = ll_s2sbi(sb);
 630         int val, rc;
 631
 632         rc = lprocfs_write_helper(buffer, count, &val);
 633         if (rc)
 634                 return rc;
 635
 636         if (val)
 637                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 638         else
 639                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
 640
 641         return count;
 642 }
 643 LPROC_SEQ_FOPS(ll_statahead_agl);
 644
 645 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
 646 {
 647         struct super_block *sb = m->private;
 648         struct ll_sb_info *sbi = ll_s2sbi(sb);
 649
 650         return seq_printf(m,
 651                         "statahead total: %u\n"
 652                         "statahead wrong: %u\n"
 653                         "agl total: %u\n",
 654                         atomic_read(&sbi->ll_sa_total),
 655                         atomic_read(&sbi->ll_sa_wrong),
 656                         atomic_read(&sbi->ll_agl_total));
 657 }
 658 LPROC_SEQ_FOPS_RO(ll_statahead_stats);
 659
 660 static int ll_lazystatfs_seq_show(struct seq_file *m, void *v)
 661 {
 662         struct super_block *sb = m->private;
 663         struct ll_sb_info *sbi = ll_s2sbi(sb);
 664
 665         return seq_printf(m, "%u\n",
 666                         (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 667 }
 668
 669 static ssize_t ll_lazystatfs_seq_write(struct file *file, const char *buffer,
 670                                    size_t count, loff_t *off)
 671 {
 672         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 673         struct ll_sb_info *sbi = ll_s2sbi(sb);
 674         int val, rc;
 675
 676         rc = lprocfs_write_helper(buffer, count, &val);
 677         if (rc)
 678                 return rc;
 679
 680         if (val)
 681                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 682         else
 683                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 684
 685         return count;
 686 }
 687 LPROC_SEQ_FOPS(ll_lazystatfs);
 688
 689 static int ll_maxea_size_seq_show(struct seq_file *m, void *v)
 690 {
 691         struct super_block *sb = m->private;
 692         struct ll_sb_info *sbi = ll_s2sbi(sb);
 693         unsigned int ealen;
 694         int rc;
 695
 696         rc = ll_get_max_mdsize(sbi, &ealen);
 697         if (rc)
 698                 return rc;
 699
 700         return seq_printf(m, "%u\n", ealen);
 701 }
 702 LPROC_SEQ_FOPS_RO(ll_maxea_size);
 703
 704 static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
 705 {
 706         const char *str[] = LL_SBI_FLAGS;
 707         struct super_block *sb = m->private;
 708         int flags = ll_s2sbi(sb)->ll_flags;
 709         int i = 0;
 710
 711         while (flags != 0) {
 712                 if (ARRAY_SIZE(str) <= i) {
 713                         CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
 714                                 "flags please.\n", ll_get_fsname(sb, NULL, 0));
 715                         return -EINVAL;
 716                 }
 717
 718                 if (flags & 0x1)
 719                         seq_printf(m, "%s ", str[i]);
 720                 flags >>= 1;
 721                 ++i;
 722         }
 723         seq_printf(m, "\b\n");
 724         return 0;
 725 }
 726 LPROC_SEQ_FOPS_RO(ll_sbi_flags);
 727
 728 static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 729         { "uuid",         &ll_sb_uuid_fops,       0, 0 },
 730         //{ "mntpt_path",   ll_rd_path,      0, 0 },
 731         { "fstype",       &ll_fstype_fops,        0, 0 },
 732         { "site",         &ll_site_stats_fops,    0, 0 },
 733         { "blocksize",    &ll_blksize_fops,       0, 0 },
 734         { "kbytestotal",  &ll_kbytestotal_fops,   0, 0 },
 735         { "kbytesfree",   &ll_kbytesfree_fops,    0, 0 },
 736         { "kbytesavail",  &ll_kbytesavail_fops,   0, 0 },
 737         { "filestotal",   &ll_filestotal_fops,    0, 0 },
 738         { "filesfree",    &ll_filesfree_fops,     0, 0 },
 739         { "client_type",  &ll_client_type_fops,   0, 0 },
 740         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
 741         { "max_read_ahead_mb", &ll_max_readahead_mb_fops, 0 },
 742         { "max_read_ahead_per_file_mb", &ll_max_readahead_per_file_mb_fops, 0 },
 743         { "max_read_ahead_whole_mb", &ll_max_read_ahead_whole_mb_fops, 0 },
 744         { "max_cached_mb",    &ll_max_cached_mb_fops, 0 },
 745         { "checksum_pages",   &ll_checksum_fops, 0 },
 746         { "max_rw_chunk",     &ll_max_rw_chunk_fops, 0 },
 747         { "stats_track_pid",  &ll_track_pid_fops, 0 },
 748         { "stats_track_ppid", &ll_track_ppid_fops, 0 },
 749         { "stats_track_gid",  &ll_track_gid_fops, 0 },
 750         { "statahead_max",    &ll_statahead_max_fops, 0 },
 751         { "statahead_agl",    &ll_statahead_agl_fops, 0 },
 752         { "statahead_stats",  &ll_statahead_stats_fops, 0, 0 },
 753         { "lazystatfs",       &ll_lazystatfs_fops, 0 },
 754         { "max_easize",       &ll_maxea_size_fops, 0, 0 },
 755         { "sbi_flags",        &ll_sbi_flags_fops, 0, 0 },
 756         { 0 }
 757 };
 758
 759 #define MAX_STRING_SIZE 128
 760
 761 struct llite_file_opcode {
 762         __u32       opcode;
 763         __u32       type;
 764         const char *opname;
 765 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 766         /* file operation */
 767         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 768         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 769         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 770                                    "read_bytes" },
 771         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 772                                    "write_bytes" },
 773         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 774                                    "brw_read" },
 775         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 776                                    "brw_write" },
 777         { LPROC_LL_OSC_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 778                                    "osc_read" },
 779         { LPROC_LL_OSC_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 780                                    "osc_write" },
 781         { LPROC_LL_IOCTL,         LPROCFS_TYPE_REGS, "ioctl" },
 782         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 783         { LPROC_LL_RELEASE,     LPROCFS_TYPE_REGS, "close" },
 784         { LPROC_LL_MAP,     LPROCFS_TYPE_REGS, "mmap" },
 785         { LPROC_LL_LLSEEK,       LPROCFS_TYPE_REGS, "seek" },
 786         { LPROC_LL_FSYNC,         LPROCFS_TYPE_REGS, "fsync" },
 787         { LPROC_LL_READDIR,     LPROCFS_TYPE_REGS, "readdir" },
 788         /* inode operation */
 789         { LPROC_LL_SETATTR,     LPROCFS_TYPE_REGS, "setattr" },
 790         { LPROC_LL_TRUNC,         LPROCFS_TYPE_REGS, "truncate" },
 791         { LPROC_LL_FLOCK,         LPROCFS_TYPE_REGS, "flock" },
 792         { LPROC_LL_GETATTR,     LPROCFS_TYPE_REGS, "getattr" },
 793         /* dir inode operation */
 794         { LPROC_LL_CREATE,       LPROCFS_TYPE_REGS, "create" },
 795         { LPROC_LL_LINK,           LPROCFS_TYPE_REGS, "link" },
 796         { LPROC_LL_UNLINK,       LPROCFS_TYPE_REGS, "unlink" },
 797         { LPROC_LL_SYMLINK,     LPROCFS_TYPE_REGS, "symlink" },
 798         { LPROC_LL_MKDIR,         LPROCFS_TYPE_REGS, "mkdir" },
 799         { LPROC_LL_RMDIR,         LPROCFS_TYPE_REGS, "rmdir" },
 800         { LPROC_LL_MKNOD,         LPROCFS_TYPE_REGS, "mknod" },
 801         { LPROC_LL_RENAME,       LPROCFS_TYPE_REGS, "rename" },
 802         /* special inode operation */
 803         { LPROC_LL_STAFS,         LPROCFS_TYPE_REGS, "statfs" },
 804         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 805         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 806         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 807         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
 808         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
 809         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
 810 };
 811
 812 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 813 {
 814         if (!sbi->ll_stats)
 815                 return;
 816         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 817                 lprocfs_counter_add(sbi->ll_stats, op, count);
 818         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
 819                  sbi->ll_stats_track_id == current->pid)
 820                 lprocfs_counter_add(sbi->ll_stats, op, count);
 821         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
 822                  sbi->ll_stats_track_id == current->parent->pid)
 823                 lprocfs_counter_add(sbi->ll_stats, op, count);
 824         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 825                  sbi->ll_stats_track_id ==
 826                         from_kgid(&init_user_ns, current_gid()))
 827                 lprocfs_counter_add(sbi->ll_stats, op, count);
 828 }
 829 EXPORT_SYMBOL(ll_stats_ops_tally);
 830
 831 static const char *ra_stat_string[] = {
 832         [RA_STAT_HIT] = "hits",
 833         [RA_STAT_MISS] = "misses",
 834         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 835         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 836         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
 837         [RA_STAT_FAILED_MATCH] = "failed lock match",
 838         [RA_STAT_DISCARDED] = "read but discarded",
 839         [RA_STAT_ZERO_LEN] = "zero length file",
 840         [RA_STAT_ZERO_WINDOW] = "zero size window",
 841         [RA_STAT_EOF] = "read-ahead to EOF",
 842         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 843         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
 844 };
 845
 846 LPROC_SEQ_FOPS_RO_TYPE(llite, name);
 847 LPROC_SEQ_FOPS_RO_TYPE(llite, uuid);
 848
 849 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 850                                 struct super_block *sb, char *osc, char *mdc)
 851 {
 852         struct lprocfs_vars lvars[2];
 853         struct lustre_sb_info *lsi = s2lsi(sb);
 854         struct ll_sb_info *sbi = ll_s2sbi(sb);
 855         struct obd_device *obd;
 856         proc_dir_entry_t *dir;
 857         char name[MAX_STRING_SIZE + 1], *ptr;
 858         int err, id, len, rc;
 859         ENTRY;
 860
 861         memset(lvars, 0, sizeof(lvars));
 862
 863         name[MAX_STRING_SIZE] = '\0';
 864         lvars[0].name = name;
 865
 866         LASSERT(sbi != NULL);
 867         LASSERT(mdc != NULL);
 868         LASSERT(osc != NULL);
 869
 870         /* Get fsname */
 871         len = strlen(lsi->lsi_lmd->lmd_profile);
 872         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
 873         if (ptr && (strcmp(ptr, "-client") == 0))
 874                 len -= 7;
 875
 876         /* Mount info */
 877         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
 878                  lsi->lsi_lmd->lmd_profile, sb);
 879
 880         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 881         if (IS_ERR(sbi->ll_proc_root)) {
 882                 err = PTR_ERR(sbi->ll_proc_root);
 883                 sbi->ll_proc_root = NULL;
 884                 RETURN(err);
 885         }
 886
 887         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
 888                                 &vvp_dump_pgcache_file_ops, sbi);
 889         if (rc)
 890                 CWARN("Error adding the dump_page_cache file\n");
 891
 892         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
 893                                 &ll_rw_extents_stats_fops, sbi);
 894         if (rc)
 895                 CWARN("Error adding the extent_stats file\n");
 896
 897         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
 898                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
 899         if (rc)
 900                 CWARN("Error adding the extents_stats_per_process file\n");
 901
 902         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
 903                                 &ll_rw_offset_stats_fops, sbi);
 904         if (rc)
 905                 CWARN("Error adding the offset_stats file\n");
 906
 907         /* File operations stats */
 908         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
 909                                             LPROCFS_STATS_FLAG_NONE);
 910         if (sbi->ll_stats == NULL)
 911                 GOTO(out, err = -ENOMEM);
 912         /* do counter init */
 913         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 914                 __u32 type = llite_opcode_table[id].type;
 915                 void *ptr = NULL;
 916                 if (type & LPROCFS_TYPE_REGS)
 917                         ptr = "regs";
 918                 else if (type & LPROCFS_TYPE_BYTES)
 919                         ptr = "bytes";
 920                 else if (type & LPROCFS_TYPE_PAGES)
 921                         ptr = "pages";
 922                 lprocfs_counter_init(sbi->ll_stats,
 923                                      llite_opcode_table[id].opcode,
 924                                      (type & LPROCFS_CNTR_AVGMINMAX),
 925                                      llite_opcode_table[id].opname, ptr);
 926         }
 927         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
 928         if (err)
 929                 GOTO(out, err);
 930
 931         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
 932                                                LPROCFS_STATS_FLAG_NONE);
 933         if (sbi->ll_ra_stats == NULL)
 934                 GOTO(out, err = -ENOMEM);
 935
 936         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
 937                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
 938                                      ra_stat_string[id], "pages");
 939         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
 940                                      sbi->ll_ra_stats);
 941         if (err)
 942                 GOTO(out, err);
 943
 944
 945         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
 946         if (err)
 947                 GOTO(out, err);
 948
 949         /* MDC info */
 950         obd = class_name2obd(mdc);
 951
 952         LASSERT(obd != NULL);
 953         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 954         LASSERT(obd->obd_type->typ_name != NULL);
 955
 956         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
 957         if (dir == NULL)
 958                 GOTO(out, err = -ENOMEM);
 959
 960         snprintf(name, MAX_STRING_SIZE, "common_name");
 961         lvars[0].fops = &llite_name_fops;
 962         err = lprocfs_add_vars(dir, lvars, obd);
 963         if (err)
 964                 GOTO(out, err);
 965
 966         snprintf(name, MAX_STRING_SIZE, "uuid");
 967         lvars[0].fops = &llite_uuid_fops;
 968         err = lprocfs_add_vars(dir, lvars, obd);
 969         if (err)
 970                 GOTO(out, err);
 971
 972         /* OSC */
 973         obd = class_name2obd(osc);
 974
 975         LASSERT(obd != NULL);
 976         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 977         LASSERT(obd->obd_type->typ_name != NULL);
 978
 979         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
 980         if (dir == NULL)
 981                 GOTO(out, err = -ENOMEM);
 982
 983         snprintf(name, MAX_STRING_SIZE, "common_name");
 984         lvars[0].fops = &llite_name_fops;
 985         err = lprocfs_add_vars(dir, lvars, obd);
 986         if (err)
 987                 GOTO(out, err);
 988
 989         snprintf(name, MAX_STRING_SIZE, "uuid");
 990         lvars[0].fops = &llite_uuid_fops;
 991         err = lprocfs_add_vars(dir, lvars, obd);
 992 out:
 993         if (err) {
 994                 lprocfs_remove(&sbi->ll_proc_root);
 995                 lprocfs_free_stats(&sbi->ll_ra_stats);
 996                 lprocfs_free_stats(&sbi->ll_stats);
 997         }
 998         RETURN(err);
 999 }
1000
1001 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
1002 {
1003         if (sbi->ll_proc_root) {
1004                 lprocfs_remove(&sbi->ll_proc_root);
1005                 lprocfs_free_stats(&sbi->ll_ra_stats);
1006                 lprocfs_free_stats(&sbi->ll_stats);
1007         }
1008 }
1009 #undef MAX_STRING_SIZE
1010
1011 #define pct(a,b) (b ? a * 100 / b : 0)
1012
1013 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1014                                    struct seq_file *seq, int which)
1015 {
1016         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1017         unsigned long start, end, r, w;
1018         char *unitp = "KMGTPEZY";
1019         int i, units = 10;
1020         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1021
1022         read_cum = 0;
1023         write_cum = 0;
1024         start = 0;
1025
1026         for(i = 0; i < LL_HIST_MAX; i++) {
1027                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1028                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1029         }
1030
1031         for(i = 0; i < LL_HIST_MAX; i++) {
1032                 r = pp_info->pp_r_hist.oh_buckets[i];
1033                 w = pp_info->pp_w_hist.oh_buckets[i];
1034                 read_cum += r;
1035                 write_cum += w;
1036                 end = 1 << (i + LL_HIST_START - units);
1037                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
1038                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
1039                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1040                            r, pct(r, read_tot), pct(read_cum, read_tot),
1041                            w, pct(w, write_tot), pct(write_cum, write_tot));
1042                 start = end;
1043                 if (start == 1<<10) {
1044                         start = 1;
1045                         units += 10;
1046                         unitp++;
1047                 }
1048                 if (read_cum == read_tot && write_cum == write_tot)
1049                         break;
1050         }
1051 }
1052
1053 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1054 {
1055         struct timeval now;
1056         struct ll_sb_info *sbi = seq->private;
1057         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1058         int k;
1059
1060         do_gettimeofday(&now);
1061
1062         if (!sbi->ll_rw_stats_on) {
1063                 seq_printf(seq, "disabled\n"
1064                                 "write anything in this file to activate, "
1065                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1066                 return 0;
1067         }
1068         seq_printf(seq, "snapshot_time:  %lu.%lu (secs.usecs)\n",
1069                    now.tv_sec, now.tv_usec);
1070         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1071         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1072                    "extents", "calls", "%", "cum%",
1073                    "calls", "%", "cum%");
1074         spin_lock(&sbi->ll_pp_extent_lock);
1075         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1076                 if (io_extents->pp_extents[k].pid != 0) {
1077                         seq_printf(seq, "\nPID: %d\n",
1078                                    io_extents->pp_extents[k].pid);
1079                         ll_display_extents_info(io_extents, seq, k);
1080                 }
1081         }
1082         spin_unlock(&sbi->ll_pp_extent_lock);
1083         return 0;
1084 }
1085
1086 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1087                                                 const char *buf, size_t len,
1088                                                 loff_t *off)
1089 {
1090         struct seq_file *seq = file->private_data;
1091         struct ll_sb_info *sbi = seq->private;
1092         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1093         int i;
1094         int value = 1, rc = 0;
1095
1096         rc = lprocfs_write_helper(buf, len, &value);
1097         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1098                        strcmp(buf, "Disabled") == 0))
1099                 value = 0;
1100
1101         if (value == 0)
1102                 sbi->ll_rw_stats_on = 0;
1103         else
1104                 sbi->ll_rw_stats_on = 1;
1105
1106         spin_lock(&sbi->ll_pp_extent_lock);
1107         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1108                 io_extents->pp_extents[i].pid = 0;
1109                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1110                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1111         }
1112         spin_unlock(&sbi->ll_pp_extent_lock);
1113         return len;
1114 }
1115
1116 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1117
1118 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1119 {
1120         struct timeval now;
1121         struct ll_sb_info *sbi = seq->private;
1122         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1123
1124         do_gettimeofday(&now);
1125
1126         if (!sbi->ll_rw_stats_on) {
1127                 seq_printf(seq, "disabled\n"
1128                                 "write anything in this file to activate, "
1129                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1130                 return 0;
1131         }
1132         seq_printf(seq, "snapshot_time:  %lu.%lu (secs.usecs)\n",
1133                    now.tv_sec, now.tv_usec);
1134
1135         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1136         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1137                    "extents", "calls", "%", "cum%",
1138                    "calls", "%", "cum%");
1139         spin_lock(&sbi->ll_lock);
1140         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1141         spin_unlock(&sbi->ll_lock);
1142
1143         return 0;
1144 }
1145
1146 static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf,
1147                                         size_t len, loff_t *off)
1148 {
1149         struct seq_file *seq = file->private_data;
1150         struct ll_sb_info *sbi = seq->private;
1151         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1152         int i;
1153         int value = 1, rc = 0;
1154
1155         rc = lprocfs_write_helper(buf, len, &value);
1156         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1157                        strcmp(buf, "Disabled") == 0))
1158                 value = 0;
1159
1160         if (value == 0)
1161                 sbi->ll_rw_stats_on = 0;
1162         else
1163                 sbi->ll_rw_stats_on = 1;
1164         spin_lock(&sbi->ll_pp_extent_lock);
1165         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1166                 io_extents->pp_extents[i].pid = 0;
1167                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1168                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1169         }
1170         spin_unlock(&sbi->ll_pp_extent_lock);
1171
1172         return len;
1173 }
1174
1175 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1176
1177 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1178                        struct ll_file_data *file, loff_t pos,
1179                        size_t count, int rw)
1180 {
1181         int i, cur = -1;
1182         struct ll_rw_process_info *process;
1183         struct ll_rw_process_info *offset;
1184         int *off_count = &sbi->ll_rw_offset_entry_count;
1185         int *process_count = &sbi->ll_offset_process_count;
1186         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1187
1188         if(!sbi->ll_rw_stats_on)
1189                 return;
1190         process = sbi->ll_rw_process_info;
1191         offset = sbi->ll_rw_offset_info;
1192
1193         spin_lock(&sbi->ll_pp_extent_lock);
1194         /* Extent statistics */
1195         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1196                 if(io_extents->pp_extents[i].pid == pid) {
1197                         cur = i;
1198                         break;
1199                 }
1200         }
1201
1202         if (cur == -1) {
1203                 /* new process */
1204                 sbi->ll_extent_process_count =
1205                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1206                 cur = sbi->ll_extent_process_count;
1207                 io_extents->pp_extents[cur].pid = pid;
1208                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1209                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1210         }
1211
1212         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1213              (i < (LL_HIST_MAX - 1)); i++);
1214         if (rw == 0) {
1215                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1216                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1217         } else {
1218                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1219                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1220         }
1221         spin_unlock(&sbi->ll_pp_extent_lock);
1222
1223         spin_lock(&sbi->ll_process_lock);
1224         /* Offset statistics */
1225         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1226                 if (process[i].rw_pid == pid) {
1227                         if (process[i].rw_last_file != file) {
1228                                 process[i].rw_range_start = pos;
1229                                 process[i].rw_last_file_pos = pos + count;
1230                                 process[i].rw_smallest_extent = count;
1231                                 process[i].rw_largest_extent = count;
1232                                 process[i].rw_offset = 0;
1233                                 process[i].rw_last_file = file;
1234                                 spin_unlock(&sbi->ll_process_lock);
1235                                 return;
1236                         }
1237                         if (process[i].rw_last_file_pos != pos) {
1238                                 *off_count =
1239                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1240                                 offset[*off_count].rw_op = process[i].rw_op;
1241                                 offset[*off_count].rw_pid = pid;
1242                                 offset[*off_count].rw_range_start =
1243                                         process[i].rw_range_start;
1244                                 offset[*off_count].rw_range_end =
1245                                         process[i].rw_last_file_pos;
1246                                 offset[*off_count].rw_smallest_extent =
1247                                         process[i].rw_smallest_extent;
1248                                 offset[*off_count].rw_largest_extent =
1249                                         process[i].rw_largest_extent;
1250                                 offset[*off_count].rw_offset =
1251                                         process[i].rw_offset;
1252                                 process[i].rw_op = rw;
1253                                 process[i].rw_range_start = pos;
1254                                 process[i].rw_smallest_extent = count;
1255                                 process[i].rw_largest_extent = count;
1256                                 process[i].rw_offset = pos -
1257                                         process[i].rw_last_file_pos;
1258                         }
1259                         if(process[i].rw_smallest_extent > count)
1260                                 process[i].rw_smallest_extent = count;
1261                         if(process[i].rw_largest_extent < count)
1262                                 process[i].rw_largest_extent = count;
1263                         process[i].rw_last_file_pos = pos + count;
1264                         spin_unlock(&sbi->ll_process_lock);
1265                         return;
1266                 }
1267         }
1268         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1269         process[*process_count].rw_pid = pid;
1270         process[*process_count].rw_op = rw;
1271         process[*process_count].rw_range_start = pos;
1272         process[*process_count].rw_last_file_pos = pos + count;
1273         process[*process_count].rw_smallest_extent = count;
1274         process[*process_count].rw_largest_extent = count;
1275         process[*process_count].rw_offset = 0;
1276         process[*process_count].rw_last_file = file;
1277         spin_unlock(&sbi->ll_process_lock);
1278 }
1279
1280 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1281 {
1282         struct timeval now;
1283         struct ll_sb_info *sbi = seq->private;
1284         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1285         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1286         int i;
1287
1288         do_gettimeofday(&now);
1289
1290         if (!sbi->ll_rw_stats_on) {
1291                 seq_printf(seq, "disabled\n"
1292                                 "write anything in this file to activate, "
1293                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1294                 return 0;
1295         }
1296         spin_lock(&sbi->ll_process_lock);
1297
1298         seq_printf(seq, "snapshot_time:  %lu.%lu (secs.usecs)\n",
1299                    now.tv_sec, now.tv_usec);
1300         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1301                    "R/W", "PID", "RANGE START", "RANGE END",
1302                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1303         /* We stored the discontiguous offsets here; print them first */
1304         for(i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1305                 if (offset[i].rw_pid != 0)
1306                         seq_printf(seq,"%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1307                                    offset[i].rw_op ? 'W' : 'R',
1308                                    offset[i].rw_pid,
1309                                    offset[i].rw_range_start,
1310                                    offset[i].rw_range_end,
1311                                    (unsigned long)offset[i].rw_smallest_extent,
1312                                    (unsigned long)offset[i].rw_largest_extent,
1313                                    offset[i].rw_offset);
1314         }
1315         /* Then print the current offsets for each process */
1316         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1317                 if (process[i].rw_pid != 0)
1318                         seq_printf(seq,"%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1319                                    process[i].rw_op ? 'W' : 'R',
1320                                    process[i].rw_pid,
1321                                    process[i].rw_range_start,
1322                                    process[i].rw_last_file_pos,
1323                                    (unsigned long)process[i].rw_smallest_extent,
1324                                    (unsigned long)process[i].rw_largest_extent,
1325                                    process[i].rw_offset);
1326         }
1327         spin_unlock(&sbi->ll_process_lock);
1328
1329         return 0;
1330 }
1331
1332 static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf,
1333                                        size_t len, loff_t *off)
1334 {
1335         struct seq_file *seq = file->private_data;
1336         struct ll_sb_info *sbi = seq->private;
1337         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1338         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1339         int value = 1, rc = 0;
1340
1341         rc = lprocfs_write_helper(buf, len, &value);
1342
1343         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1344                            strcmp(buf, "Disabled") == 0))
1345                 value = 0;
1346
1347         if (value == 0)
1348                 sbi->ll_rw_stats_on = 0;
1349         else
1350                 sbi->ll_rw_stats_on = 1;
1351
1352         spin_lock(&sbi->ll_process_lock);
1353         sbi->ll_offset_process_count = 0;
1354         sbi->ll_rw_offset_entry_count = 0;
1355         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1356                LL_PROCESS_HIST_MAX);
1357         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1358                LL_OFFSET_HIST_MAX);
1359         spin_unlock(&sbi->ll_process_lock);
1360
1361         return len;
1362 }
1363
1364 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1365
1366 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
1367 {
1368     lvars->module_vars  = NULL;
1369     lvars->obd_vars     = lprocfs_llite_obd_vars;
1370 }
1371 #endif /* LPROCFS */