Pileus Git - ~andy/linux/blob - 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 <lustre_lite.h>
  39 #include <lprocfs_status.h>
  40 #include <linux/seq_file.h>
  41 #include <obd_support.h>
  42
  43 #include "llite_internal.h"
  44
  45 /* /proc/lustre/llite mount point registration */
  46 extern struct file_operations vvp_dump_pgcache_file_ops;
  47 struct file_operations ll_rw_extents_stats_fops;
  48 struct file_operations ll_rw_extents_stats_pp_fops;
  49 struct file_operations ll_rw_offset_stats_fops;
  50
  51 static int ll_blksize_seq_show(struct seq_file *m, void *v)
  52 {
  53         struct super_block *sb = (struct super_block *)m->private;
  54         struct obd_statfs osfs;
  55         int rc;
  56
  57         LASSERT(sb != NULL);
  58         rc = ll_statfs_internal(sb, &osfs,
  59                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  60                                 OBD_STATFS_NODELAY);
  61         if (!rc)
  62               rc = seq_printf(m, "%u\n", osfs.os_bsize);
  63
  64         return rc;
  65 }
  66 LPROC_SEQ_FOPS_RO(ll_blksize);
  67
  68 static int ll_kbytestotal_seq_show(struct seq_file *m, void *v)
  69 {
  70         struct super_block *sb = (struct super_block *)m->private;
  71         struct obd_statfs osfs;
  72         int rc;
  73
  74         LASSERT(sb != NULL);
  75         rc = ll_statfs_internal(sb, &osfs,
  76                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  77                                 OBD_STATFS_NODELAY);
  78         if (!rc) {
  79                 __u32 blk_size = osfs.os_bsize >> 10;
  80                 __u64 result = osfs.os_blocks;
  81
  82                 while (blk_size >>= 1)
  83                         result <<= 1;
  84
  85                 rc = seq_printf(m, LPU64"\n", result);
  86         }
  87         return rc;
  88 }
  89 LPROC_SEQ_FOPS_RO(ll_kbytestotal);
  90
  91 static int ll_kbytesfree_seq_show(struct seq_file *m, void *v)
  92 {
  93         struct super_block *sb = (struct super_block *)m->private;
  94         struct obd_statfs osfs;
  95         int rc;
  96
  97         LASSERT(sb != NULL);
  98         rc = ll_statfs_internal(sb, &osfs,
  99                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 100                                 OBD_STATFS_NODELAY);
 101         if (!rc) {
 102                 __u32 blk_size = osfs.os_bsize >> 10;
 103                 __u64 result = osfs.os_bfree;
 104
 105                 while (blk_size >>= 1)
 106                         result <<= 1;
 107
 108                 rc = seq_printf(m, LPU64"\n", result);
 109         }
 110         return rc;
 111 }
 112 LPROC_SEQ_FOPS_RO(ll_kbytesfree);
 113
 114 static int ll_kbytesavail_seq_show(struct seq_file *m, void *v)
 115 {
 116         struct super_block *sb = (struct super_block *)m->private;
 117         struct obd_statfs osfs;
 118         int rc;
 119
 120         LASSERT(sb != NULL);
 121         rc = ll_statfs_internal(sb, &osfs,
 122                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 123                                 OBD_STATFS_NODELAY);
 124         if (!rc) {
 125                 __u32 blk_size = osfs.os_bsize >> 10;
 126                 __u64 result = osfs.os_bavail;
 127
 128                 while (blk_size >>= 1)
 129                         result <<= 1;
 130
 131                 rc = seq_printf(m, LPU64"\n", result);
 132         }
 133         return rc;
 134 }
 135 LPROC_SEQ_FOPS_RO(ll_kbytesavail);
 136
 137 static int ll_filestotal_seq_show(struct seq_file *m, void *v)
 138 {
 139         struct super_block *sb = (struct super_block *)m->private;
 140         struct obd_statfs osfs;
 141         int rc;
 142
 143         LASSERT(sb != NULL);
 144         rc = ll_statfs_internal(sb, &osfs,
 145                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 146                                 OBD_STATFS_NODELAY);
 147         if (!rc)
 148                  rc = seq_printf(m, LPU64"\n", osfs.os_files);
 149         return rc;
 150 }
 151 LPROC_SEQ_FOPS_RO(ll_filestotal);
 152
 153 static int ll_filesfree_seq_show(struct seq_file *m, void *v)
 154 {
 155         struct super_block *sb = (struct super_block *)m->private;
 156         struct obd_statfs osfs;
 157         int rc;
 158
 159         LASSERT(sb != NULL);
 160         rc = ll_statfs_internal(sb, &osfs,
 161                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 162                                 OBD_STATFS_NODELAY);
 163         if (!rc)
 164                  rc = seq_printf(m, LPU64"\n", osfs.os_ffree);
 165         return rc;
 166 }
 167 LPROC_SEQ_FOPS_RO(ll_filesfree);
 168
 169 static int ll_client_type_seq_show(struct seq_file *m, void *v)
 170 {
 171         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 172         int rc;
 173
 174         LASSERT(sbi != NULL);
 175
 176         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 177                 rc = seq_printf(m, "remote client\n");
 178         else
 179                 rc = seq_printf(m, "local client\n");
 180
 181         return rc;
 182 }
 183 LPROC_SEQ_FOPS_RO(ll_client_type);
 184
 185 static int ll_fstype_seq_show(struct seq_file *m, void *v)
 186 {
 187         struct super_block *sb = (struct super_block *)m->private;
 188
 189         LASSERT(sb != NULL);
 190         return seq_printf(m, "%s\n", sb->s_type->name);
 191 }
 192 LPROC_SEQ_FOPS_RO(ll_fstype);
 193
 194 static int ll_sb_uuid_seq_show(struct seq_file *m, void *v)
 195 {
 196         struct super_block *sb = (struct super_block *)m->private;
 197
 198         LASSERT(sb != NULL);
 199         return seq_printf(m, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
 200 }
 201 LPROC_SEQ_FOPS_RO(ll_sb_uuid);
 202
 203 static int ll_site_stats_seq_show(struct seq_file *m, void *v)
 204 {
 205         struct super_block *sb = m->private;
 206
 207         /*
 208          * See description of statistical counters in struct cl_site, and
 209          * struct lu_site.
 210          */
 211         return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site), m);
 212 }
 213 LPROC_SEQ_FOPS_RO(ll_site_stats);
 214
 215 static int ll_max_readahead_mb_seq_show(struct seq_file *m, void *v)
 216 {
 217         struct super_block *sb = m->private;
 218         struct ll_sb_info *sbi = ll_s2sbi(sb);
 219         long pages_number;
 220         int mult;
 221
 222         spin_lock(&sbi->ll_lock);
 223         pages_number = sbi->ll_ra_info.ra_max_pages;
 224         spin_unlock(&sbi->ll_lock);
 225
 226         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 227         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 228 }
 229
 230 static ssize_t ll_max_readahead_mb_seq_write(struct file *file, const char *buffer,
 231                                          size_t count, loff_t *off)
 232 {
 233         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 234         struct ll_sb_info *sbi = ll_s2sbi(sb);
 235         int mult, rc, pages_number;
 236
 237         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 238         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 239         if (rc)
 240                 return rc;
 241
 242         if (pages_number < 0 || pages_number > totalram_pages / 2) {
 243                 CERROR("can't set file readahead more than %lu MB\n",
 244                        totalram_pages >> (20 - PAGE_CACHE_SHIFT + 1)); /*1/2 of RAM*/
 245                 return -ERANGE;
 246         }
 247
 248         spin_lock(&sbi->ll_lock);
 249         sbi->ll_ra_info.ra_max_pages = pages_number;
 250         spin_unlock(&sbi->ll_lock);
 251
 252         return count;
 253 }
 254 LPROC_SEQ_FOPS(ll_max_readahead_mb);
 255
 256 static int ll_max_readahead_per_file_mb_seq_show(struct seq_file *m, void *v)
 257 {
 258         struct super_block *sb = m->private;
 259         struct ll_sb_info *sbi = ll_s2sbi(sb);
 260         long pages_number;
 261         int mult;
 262
 263         spin_lock(&sbi->ll_lock);
 264         pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
 265         spin_unlock(&sbi->ll_lock);
 266
 267         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 268         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 269 }
 270
 271 static ssize_t ll_max_readahead_per_file_mb_seq_write(struct file *file,
 272                                                   const char *buffer,
 273                                                   size_t count, loff_t *off)
 274 {
 275         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 276         struct ll_sb_info *sbi = ll_s2sbi(sb);
 277         int mult, rc, pages_number;
 278
 279         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 280         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 281         if (rc)
 282                 return rc;
 283
 284         if (pages_number < 0 ||
 285                 pages_number > sbi->ll_ra_info.ra_max_pages) {
 286                 CERROR("can't set file readahead more than"
 287                        "max_read_ahead_mb %lu MB\n",
 288                        sbi->ll_ra_info.ra_max_pages);
 289                 return -ERANGE;
 290         }
 291
 292         spin_lock(&sbi->ll_lock);
 293         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 294         spin_unlock(&sbi->ll_lock);
 295
 296         return count;
 297 }
 298 LPROC_SEQ_FOPS(ll_max_readahead_per_file_mb);
 299
 300 static int ll_max_read_ahead_whole_mb_seq_show(struct seq_file *m, void *unused)
 301 {
 302         struct super_block *sb = m->private;
 303         struct ll_sb_info *sbi = ll_s2sbi(sb);
 304         long pages_number;
 305         int mult;
 306
 307         spin_lock(&sbi->ll_lock);
 308         pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
 309         spin_unlock(&sbi->ll_lock);
 310
 311         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 312         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 313 }
 314
 315 static ssize_t ll_max_read_ahead_whole_mb_seq_write(struct file *file,
 316                                                 const char *buffer,
 317                                                 size_t count, loff_t *off)
 318 {
 319         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 320         struct ll_sb_info *sbi = ll_s2sbi(sb);
 321         int mult, rc, pages_number;
 322
 323         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 324         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 325         if (rc)
 326                 return rc;
 327
 328         /* Cap this at the current max readahead window size, the readahead
 329          * algorithm does this anyway so it's pointless to set it larger. */
 330         if (pages_number < 0 ||
 331             pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
 332                 CERROR("can't set max_read_ahead_whole_mb more than "
 333                        "max_read_ahead_per_file_mb: %lu\n",
 334                         sbi->ll_ra_info.ra_max_pages_per_file >> (20 - PAGE_CACHE_SHIFT));
 335                 return -ERANGE;
 336         }
 337
 338         spin_lock(&sbi->ll_lock);
 339         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 340         spin_unlock(&sbi->ll_lock);
 341
 342         return count;
 343 }
 344 LPROC_SEQ_FOPS(ll_max_read_ahead_whole_mb);
 345
 346 static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v)
 347 {
 348         struct super_block     *sb    = m->private;
 349         struct ll_sb_info      *sbi   = ll_s2sbi(sb);
 350         struct cl_client_cache *cache = &sbi->ll_cache;
 351         int shift = 20 - PAGE_CACHE_SHIFT;
 352         int max_cached_mb;
 353         int unused_mb;
 354
 355         max_cached_mb = cache->ccc_lru_max >> shift;
 356         unused_mb = atomic_read(&cache->ccc_lru_left) >> shift;
 357         return seq_printf(m,
 358                         "users: %d\n"
 359                         "max_cached_mb: %d\n"
 360                         "used_mb: %d\n"
 361                         "unused_mb: %d\n"
 362                         "reclaim_count: %u\n",
 363                         atomic_read(&cache->ccc_users),
 364                         max_cached_mb,
 365                         max_cached_mb - unused_mb,
 366                         unused_mb,
 367                         cache->ccc_lru_shrinkers);
 368 }
 369
 370 static ssize_t ll_max_cached_mb_seq_write(struct file *file, const char *buffer,
 371                                       size_t count, loff_t *off)
 372 {
 373         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 374         struct ll_sb_info *sbi = ll_s2sbi(sb);
 375         struct cl_client_cache *cache = &sbi->ll_cache;
 376         int mult, rc, pages_number;
 377         int diff = 0;
 378         int nrpages = 0;
 379
 380         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 381         buffer = lprocfs_find_named_value(buffer, "max_cached_mb:", &count);
 382         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 383         if (rc)
 384                 return rc;
 385
 386         if (pages_number < 0 || pages_number > totalram_pages) {
 387                 CERROR("%s: can't set max cache more than %lu MB\n",
 388                        ll_get_fsname(sb, NULL, 0),
 389                        totalram_pages >> (20 - PAGE_CACHE_SHIFT));
 390                 return -ERANGE;
 391         }
 392
 393         if (sbi->ll_dt_exp == NULL)
 394                 return -ENODEV;
 395
 396         spin_lock(&sbi->ll_lock);
 397         diff = pages_number - cache->ccc_lru_max;
 398         spin_unlock(&sbi->ll_lock);
 399
 400         /* easy - add more LRU slots. */
 401         if (diff >= 0) {
 402                 atomic_add(diff, &cache->ccc_lru_left);
 403                 GOTO(out, rc = 0);
 404         }
 405
 406         diff = -diff;
 407         while (diff > 0) {
 408                 int tmp;
 409
 410                 /* reduce LRU budget from free slots. */
 411                 do {
 412                         int ov, nv;
 413
 414                         ov = atomic_read(&cache->ccc_lru_left);
 415                         if (ov == 0)
 416                                 break;
 417
 418                         nv = ov > diff ? ov - diff : 0;
 419                         rc = atomic_cmpxchg(&cache->ccc_lru_left, ov, nv);
 420                         if (likely(ov == rc)) {
 421                                 diff -= ov - nv;
 422                                 nrpages += ov - nv;
 423                                 break;
 424                         }
 425                 } while (1);
 426
 427                 if (diff <= 0)
 428                         break;
 429
 430                 /* difficult - have to ask OSCs to drop LRU slots. */
 431                 tmp = diff << 1;
 432                 rc = obd_set_info_async(NULL, sbi->ll_dt_exp,
 433                                 sizeof(KEY_CACHE_LRU_SHRINK),
 434                                 KEY_CACHE_LRU_SHRINK,
 435                                 sizeof(tmp), &tmp, NULL);
 436                 if (rc < 0)
 437                         break;
 438         }
 439
 440 out:
 441         if (rc >= 0) {
 442                 spin_lock(&sbi->ll_lock);
 443                 cache->ccc_lru_max = pages_number;
 444                 spin_unlock(&sbi->ll_lock);
 445                 rc = count;
 446         } else {
 447                 atomic_add(nrpages, &cache->ccc_lru_left);
 448         }
 449         return rc;
 450 }
 451 LPROC_SEQ_FOPS(ll_max_cached_mb);
 452
 453 static int ll_checksum_seq_show(struct seq_file *m, void *v)
 454 {
 455         struct super_block *sb = m->private;
 456         struct ll_sb_info *sbi = ll_s2sbi(sb);
 457
 458         return seq_printf(m, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 459 }
 460
 461 static ssize_t ll_checksum_seq_write(struct file *file, const char *buffer,
 462                                  size_t count, loff_t *off)
 463 {
 464         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 465         struct ll_sb_info *sbi = ll_s2sbi(sb);
 466         int val, rc;
 467
 468         if (!sbi->ll_dt_exp)
 469                 /* Not set up yet */
 470                 return -EAGAIN;
 471
 472         rc = lprocfs_write_helper(buffer, count, &val);
 473         if (rc)
 474                 return rc;
 475         if (val)
 476                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 477         else
 478                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 479
 480         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 481                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 482         if (rc)
 483                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 484
 485         return count;
 486 }
 487 LPROC_SEQ_FOPS(ll_checksum);
 488
 489 static int ll_max_rw_chunk_seq_show(struct seq_file *m, void *v)
 490 {
 491         struct super_block *sb = m->private;
 492
 493         return seq_printf(m, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk);
 494 }
 495
 496 static ssize_t ll_max_rw_chunk_seq_write(struct file *file, const char *buffer,
 497                                      size_t count, loff_t *off)
 498 {
 499         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 500         int rc, val;
 501
 502         rc = lprocfs_write_helper(buffer, count, &val);
 503         if (rc)
 504                 return rc;
 505         ll_s2sbi(sb)->ll_max_rw_chunk = val;
 506         return count;
 507 }
 508 LPROC_SEQ_FOPS(ll_max_rw_chunk);
 509
 510 static int ll_rd_track_id(struct seq_file *m, enum stats_track_type type)
 511 {
 512         struct super_block *sb = m->private;
 513
 514         if (ll_s2sbi(sb)->ll_stats_track_type == type) {
 515                 return seq_printf(m, "%d\n",
 516                                 ll_s2sbi(sb)->ll_stats_track_id);
 517
 518         } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
 519                 return seq_printf(m, "0 (all)\n");
 520         } else {
 521                 return seq_printf(m, "untracked\n");
 522         }
 523 }
 524
 525 static int ll_wr_track_id(const char *buffer, unsigned long count, void *data,
 526                           enum stats_track_type type)
 527 {
 528         struct super_block *sb = data;
 529         int rc, pid;
 530
 531         rc = lprocfs_write_helper(buffer, count, &pid);
 532         if (rc)
 533                 return rc;
 534         ll_s2sbi(sb)->ll_stats_track_id = pid;
 535         if (pid == 0)
 536                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 537         else
 538                 ll_s2sbi(sb)->ll_stats_track_type = type;
 539         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 540         return count;
 541 }
 542
 543 static int ll_track_pid_seq_show(struct seq_file *m, void *v)
 544 {
 545         return ll_rd_track_id(m, STATS_TRACK_PID);
 546 }
 547
 548 static ssize_t ll_track_pid_seq_write(struct file *file, const char *buffer,
 549                                   size_t count, loff_t *off)
 550 {
 551         struct seq_file *seq = file->private_data;
 552         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PID);
 553 }
 554 LPROC_SEQ_FOPS(ll_track_pid);
 555
 556 static int ll_track_ppid_seq_show(struct seq_file *m, void *v)
 557 {
 558         return ll_rd_track_id(m, STATS_TRACK_PPID);
 559 }
 560
 561 static ssize_t ll_track_ppid_seq_write(struct file *file, const char *buffer,
 562                                    size_t count, loff_t *off)
 563 {
 564         struct seq_file *seq = file->private_data;
 565         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PPID);
 566 }
 567 LPROC_SEQ_FOPS(ll_track_ppid);
 568
 569 static int ll_track_gid_seq_show(struct seq_file *m, void *v)
 570 {
 571         return ll_rd_track_id(m, STATS_TRACK_GID);
 572 }
 573
 574 static ssize_t ll_track_gid_seq_write(struct file *file, const char *buffer,
 575                                   size_t count, loff_t *off)
 576 {
 577         struct seq_file *seq = file->private_data;
 578         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_GID);
 579 }
 580 LPROC_SEQ_FOPS(ll_track_gid);
 581
 582 static int ll_statahead_max_seq_show(struct seq_file *m, void *v)
 583 {
 584         struct super_block *sb = m->private;
 585         struct ll_sb_info *sbi = ll_s2sbi(sb);
 586
 587         return seq_printf(m, "%u\n", sbi->ll_sa_max);
 588 }
 589
 590 static ssize_t ll_statahead_max_seq_write(struct file *file, const char *buffer,
 591                                       size_t count, loff_t *off)
 592 {
 593         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 594         struct ll_sb_info *sbi = ll_s2sbi(sb);
 595         int val, rc;
 596
 597         rc = lprocfs_write_helper(buffer, count, &val);
 598         if (rc)
 599                 return rc;
 600
 601         if (val >= 0 && val <= LL_SA_RPC_MAX)
 602                 sbi->ll_sa_max = val;
 603         else
 604                 CERROR("Bad statahead_max value %d. Valid values are in the "
 605                        "range [0, %d]\n", val, LL_SA_RPC_MAX);
 606
 607         return count;
 608 }
 609 LPROC_SEQ_FOPS(ll_statahead_max);
 610
 611 static int ll_statahead_agl_seq_show(struct seq_file *m, void *v)
 612 {
 613         struct super_block *sb = m->private;
 614         struct ll_sb_info *sbi = ll_s2sbi(sb);
 615
 616         return seq_printf(m, "%u\n",
 617                         sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
 618 }
 619
 620 static ssize_t ll_statahead_agl_seq_write(struct file *file, const char *buffer,
 621                                       size_t count, loff_t *off)
 622 {
 623         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 624         struct ll_sb_info *sbi = ll_s2sbi(sb);
 625         int val, rc;
 626
 627         rc = lprocfs_write_helper(buffer, count, &val);
 628         if (rc)
 629                 return rc;
 630
 631         if (val)
 632                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 633         else
 634                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
 635
 636         return count;
 637 }
 638 LPROC_SEQ_FOPS(ll_statahead_agl);
 639
 640 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
 641 {
 642         struct super_block *sb = m->private;
 643         struct ll_sb_info *sbi = ll_s2sbi(sb);
 644
 645         return seq_printf(m,
 646                         "statahead total: %u\n"
 647                         "statahead wrong: %u\n"
 648                         "agl total: %u\n",
 649                         atomic_read(&sbi->ll_sa_total),
 650                         atomic_read(&sbi->ll_sa_wrong),
 651                         atomic_read(&sbi->ll_agl_total));
 652 }
 653 LPROC_SEQ_FOPS_RO(ll_statahead_stats);
 654
 655 static int ll_lazystatfs_seq_show(struct seq_file *m, void *v)
 656 {
 657         struct super_block *sb = m->private;
 658         struct ll_sb_info *sbi = ll_s2sbi(sb);
 659
 660         return seq_printf(m, "%u\n",
 661                         (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 662 }
 663
 664 static ssize_t ll_lazystatfs_seq_write(struct file *file, const char *buffer,
 665                                    size_t count, loff_t *off)
 666 {
 667         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 668         struct ll_sb_info *sbi = ll_s2sbi(sb);
 669         int val, rc;
 670
 671         rc = lprocfs_write_helper(buffer, count, &val);
 672         if (rc)
 673                 return rc;
 674
 675         if (val)
 676                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 677         else
 678                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 679
 680         return count;
 681 }
 682 LPROC_SEQ_FOPS(ll_lazystatfs);
 683
 684 static int ll_maxea_size_seq_show(struct seq_file *m, void *v)
 685 {
 686         struct super_block *sb = m->private;
 687         struct ll_sb_info *sbi = ll_s2sbi(sb);
 688         unsigned int ealen;
 689         int rc;
 690
 691         rc = ll_get_max_mdsize(sbi, &ealen);
 692         if (rc)
 693                 return rc;
 694
 695         return seq_printf(m, "%u\n", ealen);
 696 }
 697 LPROC_SEQ_FOPS_RO(ll_maxea_size);
 698
 699 static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
 700 {
 701         const char *str[] = LL_SBI_FLAGS;
 702         struct super_block *sb = m->private;
 703         int flags = ll_s2sbi(sb)->ll_flags;
 704         int i = 0;
 705
 706         while (flags != 0) {
 707                 if (ARRAY_SIZE(str) <= i) {
 708                         CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
 709                                 "flags please.\n", ll_get_fsname(sb, NULL, 0));
 710                         return -EINVAL;
 711                 }
 712
 713                 if (flags & 0x1)
 714                         seq_printf(m, "%s ", str[i]);
 715                 flags >>= 1;
 716                 ++i;
 717         }
 718         seq_printf(m, "\b\n");
 719         return 0;
 720 }
 721 LPROC_SEQ_FOPS_RO(ll_sbi_flags);
 722
 723 static int ll_xattr_cache_seq_show(struct seq_file *m, void *v)
 724 {
 725         struct super_block *sb = m->private;
 726         struct ll_sb_info *sbi = ll_s2sbi(sb);
 727         int rc;
 728
 729         rc = seq_printf(m, "%u\n", sbi->ll_xattr_cache_enabled);
 730
 731         return rc;
 732 }
 733
 734 static ssize_t ll_xattr_cache_seq_write(struct file *file, const char *buffer,
 735                                         size_t count, loff_t *off)
 736 {
 737         struct seq_file *seq = file->private_data;
 738         struct super_block *sb = seq->private;
 739         struct ll_sb_info *sbi = ll_s2sbi(sb);
 740         int val, rc;
 741
 742         rc = lprocfs_write_helper(buffer, count, &val);
 743         if (rc)
 744                 return rc;
 745
 746         if (val != 0 && val != 1)
 747                 return -ERANGE;
 748
 749         if (val == 1 && !(sbi->ll_flags & LL_SBI_XATTR_CACHE))
 750                 return -ENOTSUPP;
 751
 752         sbi->ll_xattr_cache_enabled = val;
 753
 754         return count;
 755 }
 756 LPROC_SEQ_FOPS(ll_xattr_cache);
 757
 758 static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 759         { "uuid",         &ll_sb_uuid_fops,       0, 0 },
 760         //{ "mntpt_path",   ll_rd_path,      0, 0 },
 761         { "fstype",       &ll_fstype_fops,        0, 0 },
 762         { "site",         &ll_site_stats_fops,    0, 0 },
 763         { "blocksize",    &ll_blksize_fops,       0, 0 },
 764         { "kbytestotal",  &ll_kbytestotal_fops,   0, 0 },
 765         { "kbytesfree",   &ll_kbytesfree_fops,    0, 0 },
 766         { "kbytesavail",  &ll_kbytesavail_fops,   0, 0 },
 767         { "filestotal",   &ll_filestotal_fops,    0, 0 },
 768         { "filesfree",    &ll_filesfree_fops,     0, 0 },
 769         { "client_type",  &ll_client_type_fops,   0, 0 },
 770         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
 771         { "max_read_ahead_mb", &ll_max_readahead_mb_fops, 0 },
 772         { "max_read_ahead_per_file_mb", &ll_max_readahead_per_file_mb_fops, 0 },
 773         { "max_read_ahead_whole_mb", &ll_max_read_ahead_whole_mb_fops, 0 },
 774         { "max_cached_mb",    &ll_max_cached_mb_fops, 0 },
 775         { "checksum_pages",   &ll_checksum_fops, 0 },
 776         { "max_rw_chunk",     &ll_max_rw_chunk_fops, 0 },
 777         { "stats_track_pid",  &ll_track_pid_fops, 0 },
 778         { "stats_track_ppid", &ll_track_ppid_fops, 0 },
 779         { "stats_track_gid",  &ll_track_gid_fops, 0 },
 780         { "statahead_max",    &ll_statahead_max_fops, 0 },
 781         { "statahead_agl",    &ll_statahead_agl_fops, 0 },
 782         { "statahead_stats",  &ll_statahead_stats_fops, 0, 0 },
 783         { "lazystatfs",       &ll_lazystatfs_fops, 0 },
 784         { "max_easize",       &ll_maxea_size_fops, 0, 0 },
 785         { "sbi_flags",        &ll_sbi_flags_fops, 0, 0 },
 786         { "xattr_cache",      &ll_xattr_cache_fops, 0, 0 },
 787         { 0 }
 788 };
 789
 790 #define MAX_STRING_SIZE 128
 791
 792 struct llite_file_opcode {
 793         __u32       opcode;
 794         __u32       type;
 795         const char *opname;
 796 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 797         /* file operation */
 798         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 799         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 800         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 801                                    "read_bytes" },
 802         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 803                                    "write_bytes" },
 804         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 805                                    "brw_read" },
 806         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 807                                    "brw_write" },
 808         { LPROC_LL_OSC_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 809                                    "osc_read" },
 810         { LPROC_LL_OSC_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 811                                    "osc_write" },
 812         { LPROC_LL_IOCTL,         LPROCFS_TYPE_REGS, "ioctl" },
 813         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 814         { LPROC_LL_RELEASE,     LPROCFS_TYPE_REGS, "close" },
 815         { LPROC_LL_MAP,     LPROCFS_TYPE_REGS, "mmap" },
 816         { LPROC_LL_LLSEEK,       LPROCFS_TYPE_REGS, "seek" },
 817         { LPROC_LL_FSYNC,         LPROCFS_TYPE_REGS, "fsync" },
 818         { LPROC_LL_READDIR,     LPROCFS_TYPE_REGS, "readdir" },
 819         /* inode operation */
 820         { LPROC_LL_SETATTR,     LPROCFS_TYPE_REGS, "setattr" },
 821         { LPROC_LL_TRUNC,         LPROCFS_TYPE_REGS, "truncate" },
 822         { LPROC_LL_FLOCK,         LPROCFS_TYPE_REGS, "flock" },
 823         { LPROC_LL_GETATTR,     LPROCFS_TYPE_REGS, "getattr" },
 824         /* dir inode operation */
 825         { LPROC_LL_CREATE,       LPROCFS_TYPE_REGS, "create" },
 826         { LPROC_LL_LINK,           LPROCFS_TYPE_REGS, "link" },
 827         { LPROC_LL_UNLINK,       LPROCFS_TYPE_REGS, "unlink" },
 828         { LPROC_LL_SYMLINK,     LPROCFS_TYPE_REGS, "symlink" },
 829         { LPROC_LL_MKDIR,         LPROCFS_TYPE_REGS, "mkdir" },
 830         { LPROC_LL_RMDIR,         LPROCFS_TYPE_REGS, "rmdir" },
 831         { LPROC_LL_MKNOD,         LPROCFS_TYPE_REGS, "mknod" },
 832         { LPROC_LL_RENAME,       LPROCFS_TYPE_REGS, "rename" },
 833         /* special inode operation */
 834         { LPROC_LL_STAFS,         LPROCFS_TYPE_REGS, "statfs" },
 835         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 836         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 837         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 838         { LPROC_LL_GETXATTR_HITS,  LPROCFS_TYPE_REGS, "getxattr_hits" },
 839         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
 840         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
 841         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
 842 };
 843
 844 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 845 {
 846         if (!sbi->ll_stats)
 847                 return;
 848         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 849                 lprocfs_counter_add(sbi->ll_stats, op, count);
 850         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
 851                  sbi->ll_stats_track_id == current->pid)
 852                 lprocfs_counter_add(sbi->ll_stats, op, count);
 853         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
 854                  sbi->ll_stats_track_id == current->parent->pid)
 855                 lprocfs_counter_add(sbi->ll_stats, op, count);
 856         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 857                  sbi->ll_stats_track_id ==
 858                         from_kgid(&init_user_ns, current_gid()))
 859                 lprocfs_counter_add(sbi->ll_stats, op, count);
 860 }
 861 EXPORT_SYMBOL(ll_stats_ops_tally);
 862
 863 static const char *ra_stat_string[] = {
 864         [RA_STAT_HIT] = "hits",
 865         [RA_STAT_MISS] = "misses",
 866         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 867         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 868         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
 869         [RA_STAT_FAILED_MATCH] = "failed lock match",
 870         [RA_STAT_DISCARDED] = "read but discarded",
 871         [RA_STAT_ZERO_LEN] = "zero length file",
 872         [RA_STAT_ZERO_WINDOW] = "zero size window",
 873         [RA_STAT_EOF] = "read-ahead to EOF",
 874         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 875         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
 876 };
 877
 878 LPROC_SEQ_FOPS_RO_TYPE(llite, name);
 879 LPROC_SEQ_FOPS_RO_TYPE(llite, uuid);
 880
 881 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 882                                 struct super_block *sb, char *osc, char *mdc)
 883 {
 884         struct lprocfs_vars lvars[2];
 885         struct lustre_sb_info *lsi = s2lsi(sb);
 886         struct ll_sb_info *sbi = ll_s2sbi(sb);
 887         struct obd_device *obd;
 888         struct proc_dir_entry *dir;
 889         char name[MAX_STRING_SIZE + 1], *ptr;
 890         int err, id, len, rc;
 891
 892         memset(lvars, 0, sizeof(lvars));
 893
 894         name[MAX_STRING_SIZE] = '\0';
 895         lvars[0].name = name;
 896
 897         LASSERT(sbi != NULL);
 898         LASSERT(mdc != NULL);
 899         LASSERT(osc != NULL);
 900
 901         /* Get fsname */
 902         len = strlen(lsi->lsi_lmd->lmd_profile);
 903         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
 904         if (ptr && (strcmp(ptr, "-client") == 0))
 905                 len -= 7;
 906
 907         /* Mount info */
 908         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
 909                  lsi->lsi_lmd->lmd_profile, sb);
 910
 911         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 912         if (IS_ERR(sbi->ll_proc_root)) {
 913                 err = PTR_ERR(sbi->ll_proc_root);
 914                 sbi->ll_proc_root = NULL;
 915                 return err;
 916         }
 917
 918         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
 919                                 &vvp_dump_pgcache_file_ops, sbi);
 920         if (rc)
 921                 CWARN("Error adding the dump_page_cache file\n");
 922
 923         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
 924                                 &ll_rw_extents_stats_fops, sbi);
 925         if (rc)
 926                 CWARN("Error adding the extent_stats file\n");
 927
 928         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
 929                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
 930         if (rc)
 931                 CWARN("Error adding the extents_stats_per_process file\n");
 932
 933         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
 934                                 &ll_rw_offset_stats_fops, sbi);
 935         if (rc)
 936                 CWARN("Error adding the offset_stats file\n");
 937
 938         /* File operations stats */
 939         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
 940                                             LPROCFS_STATS_FLAG_NONE);
 941         if (sbi->ll_stats == NULL)
 942                 GOTO(out, err = -ENOMEM);
 943         /* do counter init */
 944         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 945                 __u32 type = llite_opcode_table[id].type;
 946                 void *ptr = NULL;
 947                 if (type & LPROCFS_TYPE_REGS)
 948                         ptr = "regs";
 949                 else if (type & LPROCFS_TYPE_BYTES)
 950                         ptr = "bytes";
 951                 else if (type & LPROCFS_TYPE_PAGES)
 952                         ptr = "pages";
 953                 lprocfs_counter_init(sbi->ll_stats,
 954                                      llite_opcode_table[id].opcode,
 955                                      (type & LPROCFS_CNTR_AVGMINMAX),
 956                                      llite_opcode_table[id].opname, ptr);
 957         }
 958         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
 959         if (err)
 960                 GOTO(out, err);
 961
 962         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
 963                                                LPROCFS_STATS_FLAG_NONE);
 964         if (sbi->ll_ra_stats == NULL)
 965                 GOTO(out, err = -ENOMEM);
 966
 967         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
 968                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
 969                                      ra_stat_string[id], "pages");
 970         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
 971                                      sbi->ll_ra_stats);
 972         if (err)
 973                 GOTO(out, err);
 974
 975
 976         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
 977         if (err)
 978                 GOTO(out, err);
 979
 980         /* MDC info */
 981         obd = class_name2obd(mdc);
 982
 983         LASSERT(obd != NULL);
 984         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 985         LASSERT(obd->obd_type->typ_name != NULL);
 986
 987         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
 988         if (dir == NULL)
 989                 GOTO(out, err = -ENOMEM);
 990
 991         snprintf(name, MAX_STRING_SIZE, "common_name");
 992         lvars[0].fops = &llite_name_fops;
 993         err = lprocfs_add_vars(dir, lvars, obd);
 994         if (err)
 995                 GOTO(out, err);
 996
 997         snprintf(name, MAX_STRING_SIZE, "uuid");
 998         lvars[0].fops = &llite_uuid_fops;
 999         err = lprocfs_add_vars(dir, lvars, obd);
1000         if (err)
1001                 GOTO(out, err);
1002
1003         /* OSC */
1004         obd = class_name2obd(osc);
1005
1006         LASSERT(obd != NULL);
1007         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1008         LASSERT(obd->obd_type->typ_name != NULL);
1009
1010         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1011         if (dir == NULL)
1012                 GOTO(out, err = -ENOMEM);
1013
1014         snprintf(name, MAX_STRING_SIZE, "common_name");
1015         lvars[0].fops = &llite_name_fops;
1016         err = lprocfs_add_vars(dir, lvars, obd);
1017         if (err)
1018                 GOTO(out, err);
1019
1020         snprintf(name, MAX_STRING_SIZE, "uuid");
1021         lvars[0].fops = &llite_uuid_fops;
1022         err = lprocfs_add_vars(dir, lvars, obd);
1023 out:
1024         if (err) {
1025                 lprocfs_remove(&sbi->ll_proc_root);
1026                 lprocfs_free_stats(&sbi->ll_ra_stats);
1027                 lprocfs_free_stats(&sbi->ll_stats);
1028         }
1029         return err;
1030 }
1031
1032 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
1033 {
1034         if (sbi->ll_proc_root) {
1035                 lprocfs_remove(&sbi->ll_proc_root);
1036                 lprocfs_free_stats(&sbi->ll_ra_stats);
1037                 lprocfs_free_stats(&sbi->ll_stats);
1038         }
1039 }
1040 #undef MAX_STRING_SIZE
1041
1042 #define pct(a,b) (b ? a * 100 / b : 0)
1043
1044 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1045                                    struct seq_file *seq, int which)
1046 {
1047         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1048         unsigned long start, end, r, w;
1049         char *unitp = "KMGTPEZY";
1050         int i, units = 10;
1051         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1052
1053         read_cum = 0;
1054         write_cum = 0;
1055         start = 0;
1056
1057         for(i = 0; i < LL_HIST_MAX; i++) {
1058                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1059                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1060         }
1061
1062         for(i = 0; i < LL_HIST_MAX; i++) {
1063                 r = pp_info->pp_r_hist.oh_buckets[i];
1064                 w = pp_info->pp_w_hist.oh_buckets[i];
1065                 read_cum += r;
1066                 write_cum += w;
1067                 end = 1 << (i + LL_HIST_START - units);
1068                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
1069                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
1070                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1071                            r, pct(r, read_tot), pct(read_cum, read_tot),
1072                            w, pct(w, write_tot), pct(write_cum, write_tot));
1073                 start = end;
1074                 if (start == 1<<10) {
1075                         start = 1;
1076                         units += 10;
1077                         unitp++;
1078                 }
1079                 if (read_cum == read_tot && write_cum == write_tot)
1080                         break;
1081         }
1082 }
1083
1084 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1085 {
1086         struct timeval now;
1087         struct ll_sb_info *sbi = seq->private;
1088         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1089         int k;
1090
1091         do_gettimeofday(&now);
1092
1093         if (!sbi->ll_rw_stats_on) {
1094                 seq_printf(seq, "disabled\n"
1095                                 "write anything in this file to activate, "
1096                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1097                 return 0;
1098         }
1099         seq_printf(seq, "snapshot_time:  %lu.%lu (secs.usecs)\n",
1100                    now.tv_sec, (unsigned long)now.tv_usec);
1101         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1102         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1103                    "extents", "calls", "%", "cum%",
1104                    "calls", "%", "cum%");
1105         spin_lock(&sbi->ll_pp_extent_lock);
1106         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1107                 if (io_extents->pp_extents[k].pid != 0) {
1108                         seq_printf(seq, "\nPID: %d\n",
1109                                    io_extents->pp_extents[k].pid);
1110                         ll_display_extents_info(io_extents, seq, k);
1111                 }
1112         }
1113         spin_unlock(&sbi->ll_pp_extent_lock);
1114         return 0;
1115 }
1116
1117 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1118                                                 const char *buf, size_t len,
1119                                                 loff_t *off)
1120 {
1121         struct seq_file *seq = file->private_data;
1122         struct ll_sb_info *sbi = seq->private;
1123         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1124         int i;
1125         int value = 1, rc = 0;
1126
1127         rc = lprocfs_write_helper(buf, len, &value);
1128         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1129                        strcmp(buf, "Disabled") == 0))
1130                 value = 0;
1131
1132         if (value == 0)
1133                 sbi->ll_rw_stats_on = 0;
1134         else
1135                 sbi->ll_rw_stats_on = 1;
1136
1137         spin_lock(&sbi->ll_pp_extent_lock);
1138         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1139                 io_extents->pp_extents[i].pid = 0;
1140                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1141                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1142         }
1143         spin_unlock(&sbi->ll_pp_extent_lock);
1144         return len;
1145 }
1146
1147 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1148
1149 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1150 {
1151         struct timeval now;
1152         struct ll_sb_info *sbi = seq->private;
1153         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1154
1155         do_gettimeofday(&now);
1156
1157         if (!sbi->ll_rw_stats_on) {
1158                 seq_printf(seq, "disabled\n"
1159                                 "write anything in this file to activate, "
1160                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1161                 return 0;
1162         }
1163         seq_printf(seq, "snapshot_time:  %lu.%lu (secs.usecs)\n",
1164                    now.tv_sec, (unsigned long)now.tv_usec);
1165
1166         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1167         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1168                    "extents", "calls", "%", "cum%",
1169                    "calls", "%", "cum%");
1170         spin_lock(&sbi->ll_lock);
1171         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1172         spin_unlock(&sbi->ll_lock);
1173
1174         return 0;
1175 }
1176
1177 static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf,
1178                                         size_t len, loff_t *off)
1179 {
1180         struct seq_file *seq = file->private_data;
1181         struct ll_sb_info *sbi = seq->private;
1182         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1183         int i;
1184         int value = 1, rc = 0;
1185
1186         rc = lprocfs_write_helper(buf, len, &value);
1187         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1188                        strcmp(buf, "Disabled") == 0))
1189                 value = 0;
1190
1191         if (value == 0)
1192                 sbi->ll_rw_stats_on = 0;
1193         else
1194                 sbi->ll_rw_stats_on = 1;
1195         spin_lock(&sbi->ll_pp_extent_lock);
1196         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1197                 io_extents->pp_extents[i].pid = 0;
1198                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1199                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1200         }
1201         spin_unlock(&sbi->ll_pp_extent_lock);
1202
1203         return len;
1204 }
1205
1206 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1207
1208 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1209                        struct ll_file_data *file, loff_t pos,
1210                        size_t count, int rw)
1211 {
1212         int i, cur = -1;
1213         struct ll_rw_process_info *process;
1214         struct ll_rw_process_info *offset;
1215         int *off_count = &sbi->ll_rw_offset_entry_count;
1216         int *process_count = &sbi->ll_offset_process_count;
1217         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1218
1219         if(!sbi->ll_rw_stats_on)
1220                 return;
1221         process = sbi->ll_rw_process_info;
1222         offset = sbi->ll_rw_offset_info;
1223
1224         spin_lock(&sbi->ll_pp_extent_lock);
1225         /* Extent statistics */
1226         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1227                 if(io_extents->pp_extents[i].pid == pid) {
1228                         cur = i;
1229                         break;
1230                 }
1231         }
1232
1233         if (cur == -1) {
1234                 /* new process */
1235                 sbi->ll_extent_process_count =
1236                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1237                 cur = sbi->ll_extent_process_count;
1238                 io_extents->pp_extents[cur].pid = pid;
1239                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1240                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1241         }
1242
1243         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1244              (i < (LL_HIST_MAX - 1)); i++);
1245         if (rw == 0) {
1246                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1247                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1248         } else {
1249                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1250                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1251         }
1252         spin_unlock(&sbi->ll_pp_extent_lock);
1253
1254         spin_lock(&sbi->ll_process_lock);
1255         /* Offset statistics */
1256         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1257                 if (process[i].rw_pid == pid) {
1258                         if (process[i].rw_last_file != file) {
1259                                 process[i].rw_range_start = pos;
1260                                 process[i].rw_last_file_pos = pos + count;
1261                                 process[i].rw_smallest_extent = count;
1262                                 process[i].rw_largest_extent = count;
1263                                 process[i].rw_offset = 0;
1264                                 process[i].rw_last_file = file;
1265                                 spin_unlock(&sbi->ll_process_lock);
1266                                 return;
1267                         }
1268                         if (process[i].rw_last_file_pos != pos) {
1269                                 *off_count =
1270                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1271                                 offset[*off_count].rw_op = process[i].rw_op;
1272                                 offset[*off_count].rw_pid = pid;
1273                                 offset[*off_count].rw_range_start =
1274                                         process[i].rw_range_start;
1275                                 offset[*off_count].rw_range_end =
1276                                         process[i].rw_last_file_pos;
1277                                 offset[*off_count].rw_smallest_extent =
1278                                         process[i].rw_smallest_extent;
1279                                 offset[*off_count].rw_largest_extent =
1280                                         process[i].rw_largest_extent;
1281                                 offset[*off_count].rw_offset =
1282                                         process[i].rw_offset;
1283                                 process[i].rw_op = rw;
1284                                 process[i].rw_range_start = pos;
1285                                 process[i].rw_smallest_extent = count;
1286                                 process[i].rw_largest_extent = count;
1287                                 process[i].rw_offset = pos -
1288                                         process[i].rw_last_file_pos;
1289                         }
1290                         if(process[i].rw_smallest_extent > count)
1291                                 process[i].rw_smallest_extent = count;
1292                         if(process[i].rw_largest_extent < count)
1293                                 process[i].rw_largest_extent = count;
1294                         process[i].rw_last_file_pos = pos + count;
1295                         spin_unlock(&sbi->ll_process_lock);
1296                         return;
1297                 }
1298         }
1299         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1300         process[*process_count].rw_pid = pid;
1301         process[*process_count].rw_op = rw;
1302         process[*process_count].rw_range_start = pos;
1303         process[*process_count].rw_last_file_pos = pos + count;
1304         process[*process_count].rw_smallest_extent = count;
1305         process[*process_count].rw_largest_extent = count;
1306         process[*process_count].rw_offset = 0;
1307         process[*process_count].rw_last_file = file;
1308         spin_unlock(&sbi->ll_process_lock);
1309 }
1310
1311 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1312 {
1313         struct timeval now;
1314         struct ll_sb_info *sbi = seq->private;
1315         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1316         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1317         int i;
1318
1319         do_gettimeofday(&now);
1320
1321         if (!sbi->ll_rw_stats_on) {
1322                 seq_printf(seq, "disabled\n"
1323                                 "write anything in this file to activate, "
1324                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1325                 return 0;
1326         }
1327         spin_lock(&sbi->ll_process_lock);
1328
1329         seq_printf(seq, "snapshot_time:  %lu.%lu (secs.usecs)\n",
1330                    now.tv_sec, (unsigned long)now.tv_usec);
1331         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1332                    "R/W", "PID", "RANGE START", "RANGE END",
1333                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1334         /* We stored the discontiguous offsets here; print them first */
1335         for(i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1336                 if (offset[i].rw_pid != 0)
1337                         seq_printf(seq,
1338                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1339                                    offset[i].rw_op == READ ? 'R' : 'W',
1340                                    offset[i].rw_pid,
1341                                    offset[i].rw_range_start,
1342                                    offset[i].rw_range_end,
1343                                    (unsigned long)offset[i].rw_smallest_extent,
1344                                    (unsigned long)offset[i].rw_largest_extent,
1345                                    offset[i].rw_offset);
1346         }
1347         /* Then print the current offsets for each process */
1348         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1349                 if (process[i].rw_pid != 0)
1350                         seq_printf(seq,
1351                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1352                                    process[i].rw_op == READ ? 'R' : 'W',
1353                                    process[i].rw_pid,
1354                                    process[i].rw_range_start,
1355                                    process[i].rw_last_file_pos,
1356                                    (unsigned long)process[i].rw_smallest_extent,
1357                                    (unsigned long)process[i].rw_largest_extent,
1358                                    process[i].rw_offset);
1359         }
1360         spin_unlock(&sbi->ll_process_lock);
1361
1362         return 0;
1363 }
1364
1365 static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf,
1366                                        size_t len, loff_t *off)
1367 {
1368         struct seq_file *seq = file->private_data;
1369         struct ll_sb_info *sbi = seq->private;
1370         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1371         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1372         int value = 1, rc = 0;
1373
1374         rc = lprocfs_write_helper(buf, len, &value);
1375
1376         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1377                            strcmp(buf, "Disabled") == 0))
1378                 value = 0;
1379
1380         if (value == 0)
1381                 sbi->ll_rw_stats_on = 0;
1382         else
1383                 sbi->ll_rw_stats_on = 1;
1384
1385         spin_lock(&sbi->ll_process_lock);
1386         sbi->ll_offset_process_count = 0;
1387         sbi->ll_rw_offset_entry_count = 0;
1388         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1389                LL_PROCESS_HIST_MAX);
1390         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1391                LL_OFFSET_HIST_MAX);
1392         spin_unlock(&sbi->ll_process_lock);
1393
1394         return len;
1395 }
1396
1397 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1398
1399 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
1400 {
1401     lvars->module_vars  = NULL;
1402     lvars->obd_vars     = lprocfs_llite_obd_vars;
1403 }