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