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 #include "vvp_internal.h"
  45
  46 /* /proc/lustre/llite mount point registration */
  47 static struct file_operations ll_rw_extents_stats_fops;
  48 static struct file_operations ll_rw_extents_stats_pp_fops;
  49 static 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,
 371                                           const char __user *buffer,
 372                                           size_t count, loff_t *off)
 373 {
 374         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 375         struct ll_sb_info *sbi = ll_s2sbi(sb);
 376         struct cl_client_cache *cache = &sbi->ll_cache;
 377         int mult, rc, pages_number;
 378         int diff = 0;
 379         int nrpages = 0;
 380         char kernbuf[128];
 381
 382         if (count >= sizeof(kernbuf))
 383                 return -EINVAL;
 384
 385         if (copy_from_user(kernbuf, buffer, count))
 386                 return -EFAULT;
 387         kernbuf[count] = 0;
 388
 389         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 390         buffer += lprocfs_find_named_value(kernbuf, "max_cached_mb:", &count) -
 391                   kernbuf;
 392         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 393         if (rc)
 394                 return rc;
 395
 396         if (pages_number < 0 || pages_number > totalram_pages) {
 397                 CERROR("%s: can't set max cache more than %lu MB\n",
 398                        ll_get_fsname(sb, NULL, 0),
 399                        totalram_pages >> (20 - PAGE_CACHE_SHIFT));
 400                 return -ERANGE;
 401         }
 402
 403         if (sbi->ll_dt_exp == NULL)
 404                 return -ENODEV;
 405
 406         spin_lock(&sbi->ll_lock);
 407         diff = pages_number - cache->ccc_lru_max;
 408         spin_unlock(&sbi->ll_lock);
 409
 410         /* easy - add more LRU slots. */
 411         if (diff >= 0) {
 412                 atomic_add(diff, &cache->ccc_lru_left);
 413                 GOTO(out, rc = 0);
 414         }
 415
 416         diff = -diff;
 417         while (diff > 0) {
 418                 int tmp;
 419
 420                 /* reduce LRU budget from free slots. */
 421                 do {
 422                         int ov, nv;
 423
 424                         ov = atomic_read(&cache->ccc_lru_left);
 425                         if (ov == 0)
 426                                 break;
 427
 428                         nv = ov > diff ? ov - diff : 0;
 429                         rc = atomic_cmpxchg(&cache->ccc_lru_left, ov, nv);
 430                         if (likely(ov == rc)) {
 431                                 diff -= ov - nv;
 432                                 nrpages += ov - nv;
 433                                 break;
 434                         }
 435                 } while (1);
 436
 437                 if (diff <= 0)
 438                         break;
 439
 440                 /* difficult - have to ask OSCs to drop LRU slots. */
 441                 tmp = diff << 1;
 442                 rc = obd_set_info_async(NULL, sbi->ll_dt_exp,
 443                                 sizeof(KEY_CACHE_LRU_SHRINK),
 444                                 KEY_CACHE_LRU_SHRINK,
 445                                 sizeof(tmp), &tmp, NULL);
 446                 if (rc < 0)
 447                         break;
 448         }
 449
 450 out:
 451         if (rc >= 0) {
 452                 spin_lock(&sbi->ll_lock);
 453                 cache->ccc_lru_max = pages_number;
 454                 spin_unlock(&sbi->ll_lock);
 455                 rc = count;
 456         } else {
 457                 atomic_add(nrpages, &cache->ccc_lru_left);
 458         }
 459         return rc;
 460 }
 461 LPROC_SEQ_FOPS(ll_max_cached_mb);
 462
 463 static int ll_checksum_seq_show(struct seq_file *m, void *v)
 464 {
 465         struct super_block *sb = m->private;
 466         struct ll_sb_info *sbi = ll_s2sbi(sb);
 467
 468         return seq_printf(m, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 469 }
 470
 471 static ssize_t ll_checksum_seq_write(struct file *file, const char *buffer,
 472                                  size_t count, loff_t *off)
 473 {
 474         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 475         struct ll_sb_info *sbi = ll_s2sbi(sb);
 476         int val, rc;
 477
 478         if (!sbi->ll_dt_exp)
 479                 /* Not set up yet */
 480                 return -EAGAIN;
 481
 482         rc = lprocfs_write_helper(buffer, count, &val);
 483         if (rc)
 484                 return rc;
 485         if (val)
 486                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 487         else
 488                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 489
 490         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 491                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 492         if (rc)
 493                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 494
 495         return count;
 496 }
 497 LPROC_SEQ_FOPS(ll_checksum);
 498
 499 static int ll_max_rw_chunk_seq_show(struct seq_file *m, void *v)
 500 {
 501         struct super_block *sb = m->private;
 502
 503         return seq_printf(m, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk);
 504 }
 505
 506 static ssize_t ll_max_rw_chunk_seq_write(struct file *file, const char *buffer,
 507                                      size_t count, loff_t *off)
 508 {
 509         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 510         int rc, val;
 511
 512         rc = lprocfs_write_helper(buffer, count, &val);
 513         if (rc)
 514                 return rc;
 515         ll_s2sbi(sb)->ll_max_rw_chunk = val;
 516         return count;
 517 }
 518 LPROC_SEQ_FOPS(ll_max_rw_chunk);
 519
 520 static int ll_rd_track_id(struct seq_file *m, enum stats_track_type type)
 521 {
 522         struct super_block *sb = m->private;
 523
 524         if (ll_s2sbi(sb)->ll_stats_track_type == type) {
 525                 return seq_printf(m, "%d\n",
 526                                 ll_s2sbi(sb)->ll_stats_track_id);
 527
 528         } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
 529                 return seq_printf(m, "0 (all)\n");
 530         } else {
 531                 return seq_printf(m, "untracked\n");
 532         }
 533 }
 534
 535 static int ll_wr_track_id(const char *buffer, unsigned long count, void *data,
 536                           enum stats_track_type type)
 537 {
 538         struct super_block *sb = data;
 539         int rc, pid;
 540
 541         rc = lprocfs_write_helper(buffer, count, &pid);
 542         if (rc)
 543                 return rc;
 544         ll_s2sbi(sb)->ll_stats_track_id = pid;
 545         if (pid == 0)
 546                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 547         else
 548                 ll_s2sbi(sb)->ll_stats_track_type = type;
 549         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 550         return count;
 551 }
 552
 553 static int ll_track_pid_seq_show(struct seq_file *m, void *v)
 554 {
 555         return ll_rd_track_id(m, STATS_TRACK_PID);
 556 }
 557
 558 static ssize_t ll_track_pid_seq_write(struct file *file, const char *buffer,
 559                                   size_t count, loff_t *off)
 560 {
 561         struct seq_file *seq = file->private_data;
 562         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PID);
 563 }
 564 LPROC_SEQ_FOPS(ll_track_pid);
 565
 566 static int ll_track_ppid_seq_show(struct seq_file *m, void *v)
 567 {
 568         return ll_rd_track_id(m, STATS_TRACK_PPID);
 569 }
 570
 571 static ssize_t ll_track_ppid_seq_write(struct file *file, const char *buffer,
 572                                    size_t count, loff_t *off)
 573 {
 574         struct seq_file *seq = file->private_data;
 575         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PPID);
 576 }
 577 LPROC_SEQ_FOPS(ll_track_ppid);
 578
 579 static int ll_track_gid_seq_show(struct seq_file *m, void *v)
 580 {
 581         return ll_rd_track_id(m, STATS_TRACK_GID);
 582 }
 583
 584 static ssize_t ll_track_gid_seq_write(struct file *file, const char *buffer,
 585                                   size_t count, loff_t *off)
 586 {
 587         struct seq_file *seq = file->private_data;
 588         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_GID);
 589 }
 590 LPROC_SEQ_FOPS(ll_track_gid);
 591
 592 static int ll_statahead_max_seq_show(struct seq_file *m, void *v)
 593 {
 594         struct super_block *sb = m->private;
 595         struct ll_sb_info *sbi = ll_s2sbi(sb);
 596
 597         return seq_printf(m, "%u\n", sbi->ll_sa_max);
 598 }
 599
 600 static ssize_t ll_statahead_max_seq_write(struct file *file, const char *buffer,
 601                                       size_t count, loff_t *off)
 602 {
 603         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 604         struct ll_sb_info *sbi = ll_s2sbi(sb);
 605         int val, rc;
 606
 607         rc = lprocfs_write_helper(buffer, count, &val);
 608         if (rc)
 609                 return rc;
 610
 611         if (val >= 0 && val <= LL_SA_RPC_MAX)
 612                 sbi->ll_sa_max = val;
 613         else
 614                 CERROR("Bad statahead_max value %d. Valid values are in the "
 615                        "range [0, %d]\n", val, LL_SA_RPC_MAX);
 616
 617         return count;
 618 }
 619 LPROC_SEQ_FOPS(ll_statahead_max);
 620
 621 static int ll_statahead_agl_seq_show(struct seq_file *m, void *v)
 622 {
 623         struct super_block *sb = m->private;
 624         struct ll_sb_info *sbi = ll_s2sbi(sb);
 625
 626         return seq_printf(m, "%u\n",
 627                         sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
 628 }
 629
 630 static ssize_t ll_statahead_agl_seq_write(struct file *file, const char *buffer,
 631                                       size_t count, loff_t *off)
 632 {
 633         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 634         struct ll_sb_info *sbi = ll_s2sbi(sb);
 635         int val, rc;
 636
 637         rc = lprocfs_write_helper(buffer, count, &val);
 638         if (rc)
 639                 return rc;
 640
 641         if (val)
 642                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 643         else
 644                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
 645
 646         return count;
 647 }
 648 LPROC_SEQ_FOPS(ll_statahead_agl);
 649
 650 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
 651 {
 652         struct super_block *sb = m->private;
 653         struct ll_sb_info *sbi = ll_s2sbi(sb);
 654
 655         return seq_printf(m,
 656                         "statahead total: %u\n"
 657                         "statahead wrong: %u\n"
 658                         "agl total: %u\n",
 659                         atomic_read(&sbi->ll_sa_total),
 660                         atomic_read(&sbi->ll_sa_wrong),
 661                         atomic_read(&sbi->ll_agl_total));
 662 }
 663 LPROC_SEQ_FOPS_RO(ll_statahead_stats);
 664
 665 static int ll_lazystatfs_seq_show(struct seq_file *m, void *v)
 666 {
 667         struct super_block *sb = m->private;
 668         struct ll_sb_info *sbi = ll_s2sbi(sb);
 669
 670         return seq_printf(m, "%u\n",
 671                         (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 672 }
 673
 674 static ssize_t ll_lazystatfs_seq_write(struct file *file, const char *buffer,
 675                                    size_t count, loff_t *off)
 676 {
 677         struct super_block *sb = ((struct seq_file *)file->private_data)->private;
 678         struct ll_sb_info *sbi = ll_s2sbi(sb);
 679         int val, rc;
 680
 681         rc = lprocfs_write_helper(buffer, count, &val);
 682         if (rc)
 683                 return rc;
 684
 685         if (val)
 686                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 687         else
 688                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 689
 690         return count;
 691 }
 692 LPROC_SEQ_FOPS(ll_lazystatfs);
 693
 694 static int ll_max_easize_seq_show(struct seq_file *m, void *v)
 695 {
 696         struct super_block *sb = m->private;
 697         struct ll_sb_info *sbi = ll_s2sbi(sb);
 698         unsigned int ealen;
 699         int rc;
 700
 701         rc = ll_get_max_mdsize(sbi, &ealen);
 702         if (rc)
 703                 return rc;
 704
 705         return seq_printf(m, "%u\n", ealen);
 706 }
 707 LPROC_SEQ_FOPS_RO(ll_max_easize);
 708
 709 static int ll_defult_easize_seq_show(struct seq_file *m, void *v)
 710 {
 711         struct super_block *sb = m->private;
 712         struct ll_sb_info *sbi = ll_s2sbi(sb);
 713         unsigned int ealen;
 714         int rc;
 715
 716         rc = ll_get_default_mdsize(sbi, &ealen);
 717         if (rc)
 718                 return rc;
 719
 720         return seq_printf(m, "%u\n", ealen);
 721 }
 722 LPROC_SEQ_FOPS_RO(ll_defult_easize);
 723
 724 static int ll_max_cookiesize_seq_show(struct seq_file *m, void *v)
 725 {
 726         struct super_block *sb = m->private;
 727         struct ll_sb_info *sbi = ll_s2sbi(sb);
 728         unsigned int cookielen;
 729         int rc;
 730
 731         rc = ll_get_max_cookiesize(sbi, &cookielen);
 732         if (rc)
 733                 return rc;
 734
 735         return seq_printf(m, "%u\n", cookielen);
 736 }
 737 LPROC_SEQ_FOPS_RO(ll_max_cookiesize);
 738
 739 static int ll_defult_cookiesize_seq_show(struct seq_file *m, void *v)
 740 {
 741         struct super_block *sb = m->private;
 742         struct ll_sb_info *sbi = ll_s2sbi(sb);
 743         unsigned int cookielen;
 744         int rc;
 745
 746         rc = ll_get_default_cookiesize(sbi, &cookielen);
 747         if (rc)
 748                 return rc;
 749
 750         return seq_printf(m, "%u\n", cookielen);
 751 }
 752 LPROC_SEQ_FOPS_RO(ll_defult_cookiesize);
 753
 754 static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
 755 {
 756         const char *str[] = LL_SBI_FLAGS;
 757         struct super_block *sb = m->private;
 758         int flags = ll_s2sbi(sb)->ll_flags;
 759         int i = 0;
 760
 761         while (flags != 0) {
 762                 if (ARRAY_SIZE(str) <= i) {
 763                         CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
 764                                 "flags please.\n", ll_get_fsname(sb, NULL, 0));
 765                         return -EINVAL;
 766                 }
 767
 768                 if (flags & 0x1)
 769                         seq_printf(m, "%s ", str[i]);
 770                 flags >>= 1;
 771                 ++i;
 772         }
 773         seq_printf(m, "\b\n");
 774         return 0;
 775 }
 776 LPROC_SEQ_FOPS_RO(ll_sbi_flags);
 777
 778 static int ll_xattr_cache_seq_show(struct seq_file *m, void *v)
 779 {
 780         struct super_block *sb = m->private;
 781         struct ll_sb_info *sbi = ll_s2sbi(sb);
 782         int rc;
 783
 784         rc = seq_printf(m, "%u\n", sbi->ll_xattr_cache_enabled);
 785
 786         return rc;
 787 }
 788
 789 static ssize_t ll_xattr_cache_seq_write(struct file *file, const char *buffer,
 790                                         size_t count, loff_t *off)
 791 {
 792         struct seq_file *seq = file->private_data;
 793         struct super_block *sb = seq->private;
 794         struct ll_sb_info *sbi = ll_s2sbi(sb);
 795         int val, rc;
 796
 797         rc = lprocfs_write_helper(buffer, count, &val);
 798         if (rc)
 799                 return rc;
 800
 801         if (val != 0 && val != 1)
 802                 return -ERANGE;
 803
 804         if (val == 1 && !(sbi->ll_flags & LL_SBI_XATTR_CACHE))
 805                 return -ENOTSUPP;
 806
 807         sbi->ll_xattr_cache_enabled = val;
 808
 809         return count;
 810 }
 811 LPROC_SEQ_FOPS(ll_xattr_cache);
 812
 813 static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 814         { "uuid",         &ll_sb_uuid_fops,       NULL, 0 },
 815         //{ "mntpt_path",   ll_rd_path,      0, 0 },
 816         { "fstype",       &ll_fstype_fops,        NULL, 0 },
 817         { "site",         &ll_site_stats_fops,    NULL, 0 },
 818         { "blocksize",    &ll_blksize_fops,       NULL, 0 },
 819         { "kbytestotal",  &ll_kbytestotal_fops,   NULL, 0 },
 820         { "kbytesfree",   &ll_kbytesfree_fops,    NULL, 0 },
 821         { "kbytesavail",  &ll_kbytesavail_fops,   NULL, 0 },
 822         { "filestotal",   &ll_filestotal_fops,    NULL, 0 },
 823         { "filesfree",    &ll_filesfree_fops,     NULL, 0 },
 824         { "client_type",  &ll_client_type_fops,   NULL, 0 },
 825         //{ "filegroups",   lprocfs_rd_filegroups,  0, 0 },
 826         { "max_read_ahead_mb", &ll_max_readahead_mb_fops, NULL },
 827         { "max_read_ahead_per_file_mb", &ll_max_readahead_per_file_mb_fops,
 828                 NULL },
 829         { "max_read_ahead_whole_mb", &ll_max_read_ahead_whole_mb_fops, NULL },
 830         { "max_cached_mb",    &ll_max_cached_mb_fops, NULL },
 831         { "checksum_pages",   &ll_checksum_fops, NULL },
 832         { "max_rw_chunk",     &ll_max_rw_chunk_fops, NULL },
 833         { "stats_track_pid",  &ll_track_pid_fops, NULL },
 834         { "stats_track_ppid", &ll_track_ppid_fops, NULL },
 835         { "stats_track_gid",  &ll_track_gid_fops, NULL },
 836         { "statahead_max",    &ll_statahead_max_fops, NULL },
 837         { "statahead_agl",    &ll_statahead_agl_fops, NULL },
 838         { "statahead_stats",  &ll_statahead_stats_fops, NULL, 0 },
 839         { "lazystatfs",       &ll_lazystatfs_fops, NULL },
 840         { "max_easize",       &ll_max_easize_fops, NULL, 0 },
 841         { "default_easize",   &ll_defult_easize_fops, NULL, 0 },
 842         { "max_cookiesize",   &ll_max_cookiesize_fops, NULL, 0 },
 843         { "default_cookiesize", &ll_defult_cookiesize_fops, NULL, 0 },
 844         { "sbi_flags",        &ll_sbi_flags_fops, NULL, 0 },
 845         { "xattr_cache",      &ll_xattr_cache_fops, NULL, 0 },
 846         { 0 }
 847 };
 848
 849 #define MAX_STRING_SIZE 128
 850
 851 static const struct llite_file_opcode {
 852         __u32       opcode;
 853         __u32       type;
 854         const char *opname;
 855 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 856         /* file operation */
 857         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 858         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 859         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 860                                    "read_bytes" },
 861         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 862                                    "write_bytes" },
 863         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 864                                    "brw_read" },
 865         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 866                                    "brw_write" },
 867         { LPROC_LL_OSC_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 868                                    "osc_read" },
 869         { LPROC_LL_OSC_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 870                                    "osc_write" },
 871         { LPROC_LL_IOCTL,         LPROCFS_TYPE_REGS, "ioctl" },
 872         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 873         { LPROC_LL_RELEASE,     LPROCFS_TYPE_REGS, "close" },
 874         { LPROC_LL_MAP,     LPROCFS_TYPE_REGS, "mmap" },
 875         { LPROC_LL_LLSEEK,       LPROCFS_TYPE_REGS, "seek" },
 876         { LPROC_LL_FSYNC,         LPROCFS_TYPE_REGS, "fsync" },
 877         { LPROC_LL_READDIR,     LPROCFS_TYPE_REGS, "readdir" },
 878         /* inode operation */
 879         { LPROC_LL_SETATTR,     LPROCFS_TYPE_REGS, "setattr" },
 880         { LPROC_LL_TRUNC,         LPROCFS_TYPE_REGS, "truncate" },
 881         { LPROC_LL_FLOCK,         LPROCFS_TYPE_REGS, "flock" },
 882         { LPROC_LL_GETATTR,     LPROCFS_TYPE_REGS, "getattr" },
 883         /* dir inode operation */
 884         { LPROC_LL_CREATE,       LPROCFS_TYPE_REGS, "create" },
 885         { LPROC_LL_LINK,           LPROCFS_TYPE_REGS, "link" },
 886         { LPROC_LL_UNLINK,       LPROCFS_TYPE_REGS, "unlink" },
 887         { LPROC_LL_SYMLINK,     LPROCFS_TYPE_REGS, "symlink" },
 888         { LPROC_LL_MKDIR,         LPROCFS_TYPE_REGS, "mkdir" },
 889         { LPROC_LL_RMDIR,         LPROCFS_TYPE_REGS, "rmdir" },
 890         { LPROC_LL_MKNOD,         LPROCFS_TYPE_REGS, "mknod" },
 891         { LPROC_LL_RENAME,       LPROCFS_TYPE_REGS, "rename" },
 892         /* special inode operation */
 893         { LPROC_LL_STAFS,         LPROCFS_TYPE_REGS, "statfs" },
 894         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 895         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 896         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 897         { LPROC_LL_GETXATTR_HITS,  LPROCFS_TYPE_REGS, "getxattr_hits" },
 898         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
 899         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
 900         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
 901 };
 902
 903 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 904 {
 905         if (!sbi->ll_stats)
 906                 return;
 907         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 908                 lprocfs_counter_add(sbi->ll_stats, op, count);
 909         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
 910                  sbi->ll_stats_track_id == current->pid)
 911                 lprocfs_counter_add(sbi->ll_stats, op, count);
 912         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
 913                  sbi->ll_stats_track_id == current->parent->pid)
 914                 lprocfs_counter_add(sbi->ll_stats, op, count);
 915         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 916                  sbi->ll_stats_track_id ==
 917                         from_kgid(&init_user_ns, current_gid()))
 918                 lprocfs_counter_add(sbi->ll_stats, op, count);
 919 }
 920 EXPORT_SYMBOL(ll_stats_ops_tally);
 921
 922 static const char *ra_stat_string[] = {
 923         [RA_STAT_HIT] = "hits",
 924         [RA_STAT_MISS] = "misses",
 925         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 926         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 927         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
 928         [RA_STAT_FAILED_MATCH] = "failed lock match",
 929         [RA_STAT_DISCARDED] = "read but discarded",
 930         [RA_STAT_ZERO_LEN] = "zero length file",
 931         [RA_STAT_ZERO_WINDOW] = "zero size window",
 932         [RA_STAT_EOF] = "read-ahead to EOF",
 933         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 934         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
 935 };
 936
 937 LPROC_SEQ_FOPS_RO_TYPE(llite, name);
 938 LPROC_SEQ_FOPS_RO_TYPE(llite, uuid);
 939
 940 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 941                                 struct super_block *sb, char *osc, char *mdc)
 942 {
 943         struct lprocfs_vars lvars[2];
 944         struct lustre_sb_info *lsi = s2lsi(sb);
 945         struct ll_sb_info *sbi = ll_s2sbi(sb);
 946         struct obd_device *obd;
 947         struct proc_dir_entry *dir;
 948         char name[MAX_STRING_SIZE + 1], *ptr;
 949         int err, id, len, rc;
 950
 951         memset(lvars, 0, sizeof(lvars));
 952
 953         name[MAX_STRING_SIZE] = '\0';
 954         lvars[0].name = name;
 955
 956         LASSERT(sbi != NULL);
 957         LASSERT(mdc != NULL);
 958         LASSERT(osc != NULL);
 959
 960         /* Get fsname */
 961         len = strlen(lsi->lsi_lmd->lmd_profile);
 962         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
 963         if (ptr && (strcmp(ptr, "-client") == 0))
 964                 len -= 7;
 965
 966         /* Mount info */
 967         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
 968                  lsi->lsi_lmd->lmd_profile, sb);
 969
 970         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
 971         if (IS_ERR(sbi->ll_proc_root)) {
 972                 err = PTR_ERR(sbi->ll_proc_root);
 973                 sbi->ll_proc_root = NULL;
 974                 return err;
 975         }
 976
 977         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
 978                                 &vvp_dump_pgcache_file_ops, sbi);
 979         if (rc)
 980                 CWARN("Error adding the dump_page_cache file\n");
 981
 982         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
 983                                 &ll_rw_extents_stats_fops, sbi);
 984         if (rc)
 985                 CWARN("Error adding the extent_stats file\n");
 986
 987         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
 988                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
 989         if (rc)
 990                 CWARN("Error adding the extents_stats_per_process file\n");
 991
 992         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
 993                                 &ll_rw_offset_stats_fops, sbi);
 994         if (rc)
 995                 CWARN("Error adding the offset_stats file\n");
 996
 997         /* File operations stats */
 998         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
 999                                             LPROCFS_STATS_FLAG_NONE);
1000         if (sbi->ll_stats == NULL)
1001                 GOTO(out, err = -ENOMEM);
1002         /* do counter init */
1003         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
1004                 __u32 type = llite_opcode_table[id].type;
1005                 void *ptr = NULL;
1006                 if (type & LPROCFS_TYPE_REGS)
1007                         ptr = "regs";
1008                 else if (type & LPROCFS_TYPE_BYTES)
1009                         ptr = "bytes";
1010                 else if (type & LPROCFS_TYPE_PAGES)
1011                         ptr = "pages";
1012                 lprocfs_counter_init(sbi->ll_stats,
1013                                      llite_opcode_table[id].opcode,
1014                                      (type & LPROCFS_CNTR_AVGMINMAX),
1015                                      llite_opcode_table[id].opname, ptr);
1016         }
1017         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
1018         if (err)
1019                 GOTO(out, err);
1020
1021         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1022                                                LPROCFS_STATS_FLAG_NONE);
1023         if (sbi->ll_ra_stats == NULL)
1024                 GOTO(out, err = -ENOMEM);
1025
1026         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1027                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
1028                                      ra_stat_string[id], "pages");
1029         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
1030                                      sbi->ll_ra_stats);
1031         if (err)
1032                 GOTO(out, err);
1033
1034
1035         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
1036         if (err)
1037                 GOTO(out, err);
1038
1039         /* MDC info */
1040         obd = class_name2obd(mdc);
1041
1042         LASSERT(obd != NULL);
1043         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1044         LASSERT(obd->obd_type->typ_name != NULL);
1045
1046         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1047         if (dir == NULL)
1048                 GOTO(out, err = -ENOMEM);
1049
1050         snprintf(name, MAX_STRING_SIZE, "common_name");
1051         lvars[0].fops = &llite_name_fops;
1052         err = lprocfs_add_vars(dir, lvars, obd);
1053         if (err)
1054                 GOTO(out, err);
1055
1056         snprintf(name, MAX_STRING_SIZE, "uuid");
1057         lvars[0].fops = &llite_uuid_fops;
1058         err = lprocfs_add_vars(dir, lvars, obd);
1059         if (err)
1060                 GOTO(out, err);
1061
1062         /* OSC */
1063         obd = class_name2obd(osc);
1064
1065         LASSERT(obd != NULL);
1066         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1067         LASSERT(obd->obd_type->typ_name != NULL);
1068
1069         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1070         if (dir == NULL)
1071                 GOTO(out, err = -ENOMEM);
1072
1073         snprintf(name, MAX_STRING_SIZE, "common_name");
1074         lvars[0].fops = &llite_name_fops;
1075         err = lprocfs_add_vars(dir, lvars, obd);
1076         if (err)
1077                 GOTO(out, err);
1078
1079         snprintf(name, MAX_STRING_SIZE, "uuid");
1080         lvars[0].fops = &llite_uuid_fops;
1081         err = lprocfs_add_vars(dir, lvars, obd);
1082 out:
1083         if (err) {
1084                 lprocfs_remove(&sbi->ll_proc_root);
1085                 lprocfs_free_stats(&sbi->ll_ra_stats);
1086                 lprocfs_free_stats(&sbi->ll_stats);
1087         }
1088         return err;
1089 }
1090
1091 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
1092 {
1093         if (sbi->ll_proc_root) {
1094                 lprocfs_remove(&sbi->ll_proc_root);
1095                 lprocfs_free_stats(&sbi->ll_ra_stats);
1096                 lprocfs_free_stats(&sbi->ll_stats);
1097         }
1098 }
1099 #undef MAX_STRING_SIZE
1100
1101 #define pct(a,b) (b ? a * 100 / b : 0)
1102
1103 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1104                                    struct seq_file *seq, int which)
1105 {
1106         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1107         unsigned long start, end, r, w;
1108         char *unitp = "KMGTPEZY";
1109         int i, units = 10;
1110         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1111
1112         read_cum = 0;
1113         write_cum = 0;
1114         start = 0;
1115
1116         for(i = 0; i < LL_HIST_MAX; i++) {
1117                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1118                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1119         }
1120
1121         for(i = 0; i < LL_HIST_MAX; i++) {
1122                 r = pp_info->pp_r_hist.oh_buckets[i];
1123                 w = pp_info->pp_w_hist.oh_buckets[i];
1124                 read_cum += r;
1125                 write_cum += w;
1126                 end = 1 << (i + LL_HIST_START - units);
1127                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
1128                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
1129                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1130                            r, pct(r, read_tot), pct(read_cum, read_tot),
1131                            w, pct(w, write_tot), pct(write_cum, write_tot));
1132                 start = end;
1133                 if (start == 1<<10) {
1134                         start = 1;
1135                         units += 10;
1136                         unitp++;
1137                 }
1138                 if (read_cum == read_tot && write_cum == write_tot)
1139                         break;
1140         }
1141 }
1142
1143 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1144 {
1145         struct timeval now;
1146         struct ll_sb_info *sbi = seq->private;
1147         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1148         int k;
1149
1150         do_gettimeofday(&now);
1151
1152         if (!sbi->ll_rw_stats_on) {
1153                 seq_printf(seq, "disabled\n"
1154                                 "write anything in this file to activate, "
1155                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1156                 return 0;
1157         }
1158         seq_printf(seq, "snapshot_time:  %lu.%lu (secs.usecs)\n",
1159                    now.tv_sec, (unsigned long)now.tv_usec);
1160         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1161         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1162                    "extents", "calls", "%", "cum%",
1163                    "calls", "%", "cum%");
1164         spin_lock(&sbi->ll_pp_extent_lock);
1165         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1166                 if (io_extents->pp_extents[k].pid != 0) {
1167                         seq_printf(seq, "\nPID: %d\n",
1168                                    io_extents->pp_extents[k].pid);
1169                         ll_display_extents_info(io_extents, seq, k);
1170                 }
1171         }
1172         spin_unlock(&sbi->ll_pp_extent_lock);
1173         return 0;
1174 }
1175
1176 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1177                                                 const char __user *buf,
1178                                                 size_t len,
1179                                                 loff_t *off)
1180 {
1181         struct seq_file *seq = file->private_data;
1182         struct ll_sb_info *sbi = seq->private;
1183         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1184         int i;
1185         int value = 1, rc = 0;
1186
1187         if (len == 0)
1188                 return -EINVAL;
1189
1190         rc = lprocfs_write_helper(buf, len, &value);
1191         if (rc < 0 && len < 16) {
1192                 char kernbuf[16];
1193
1194                 if (copy_from_user(kernbuf, buf, len))
1195                         return -EFAULT;
1196                 kernbuf[len] = 0;
1197
1198                 if (kernbuf[len - 1] == '\n')
1199                         kernbuf[len - 1] = 0;
1200
1201                 if (strcmp(kernbuf, "disabled") == 0 ||
1202                     strcmp(kernbuf, "Disabled") == 0)
1203                         value = 0;
1204         }
1205
1206         if (value == 0)
1207                 sbi->ll_rw_stats_on = 0;
1208         else
1209                 sbi->ll_rw_stats_on = 1;
1210
1211         spin_lock(&sbi->ll_pp_extent_lock);
1212         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1213                 io_extents->pp_extents[i].pid = 0;
1214                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1215                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1216         }
1217         spin_unlock(&sbi->ll_pp_extent_lock);
1218         return len;
1219 }
1220
1221 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1222
1223 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1224 {
1225         struct timeval now;
1226         struct ll_sb_info *sbi = seq->private;
1227         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1228
1229         do_gettimeofday(&now);
1230
1231         if (!sbi->ll_rw_stats_on) {
1232                 seq_printf(seq, "disabled\n"
1233                                 "write anything in this file to activate, "
1234                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1235                 return 0;
1236         }
1237         seq_printf(seq, "snapshot_time:  %lu.%lu (secs.usecs)\n",
1238                    now.tv_sec, (unsigned long)now.tv_usec);
1239
1240         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1241         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1242                    "extents", "calls", "%", "cum%",
1243                    "calls", "%", "cum%");
1244         spin_lock(&sbi->ll_lock);
1245         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1246         spin_unlock(&sbi->ll_lock);
1247
1248         return 0;
1249 }
1250
1251 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
1252                                              const char __user *buf,
1253                                              size_t len, loff_t *off)
1254 {
1255         struct seq_file *seq = file->private_data;
1256         struct ll_sb_info *sbi = seq->private;
1257         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1258         int i;
1259         int value = 1, rc = 0;
1260
1261         if (len == 0)
1262                 return -EINVAL;
1263
1264         rc = lprocfs_write_helper(buf, len, &value);
1265         if (rc < 0 && len < 16) {
1266                 char kernbuf[16];
1267
1268                 if (copy_from_user(kernbuf, buf, len))
1269                         return -EFAULT;
1270                 kernbuf[len] = 0;
1271
1272                 if (kernbuf[len - 1] == '\n')
1273                         kernbuf[len - 1] = 0;
1274
1275                 if (strcmp(kernbuf, "disabled") == 0 ||
1276                     strcmp(kernbuf, "Disabled") == 0)
1277                         value = 0;
1278         }
1279
1280         if (value == 0)
1281                 sbi->ll_rw_stats_on = 0;
1282         else
1283                 sbi->ll_rw_stats_on = 1;
1284
1285         spin_lock(&sbi->ll_pp_extent_lock);
1286         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1287                 io_extents->pp_extents[i].pid = 0;
1288                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1289                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1290         }
1291         spin_unlock(&sbi->ll_pp_extent_lock);
1292
1293         return len;
1294 }
1295 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1296
1297 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1298                        struct ll_file_data *file, loff_t pos,
1299                        size_t count, int rw)
1300 {
1301         int i, cur = -1;
1302         struct ll_rw_process_info *process;
1303         struct ll_rw_process_info *offset;
1304         int *off_count = &sbi->ll_rw_offset_entry_count;
1305         int *process_count = &sbi->ll_offset_process_count;
1306         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1307
1308         if(!sbi->ll_rw_stats_on)
1309                 return;
1310         process = sbi->ll_rw_process_info;
1311         offset = sbi->ll_rw_offset_info;
1312
1313         spin_lock(&sbi->ll_pp_extent_lock);
1314         /* Extent statistics */
1315         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1316                 if(io_extents->pp_extents[i].pid == pid) {
1317                         cur = i;
1318                         break;
1319                 }
1320         }
1321
1322         if (cur == -1) {
1323                 /* new process */
1324                 sbi->ll_extent_process_count =
1325                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1326                 cur = sbi->ll_extent_process_count;
1327                 io_extents->pp_extents[cur].pid = pid;
1328                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1329                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1330         }
1331
1332         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1333              (i < (LL_HIST_MAX - 1)); i++);
1334         if (rw == 0) {
1335                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1336                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1337         } else {
1338                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1339                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1340         }
1341         spin_unlock(&sbi->ll_pp_extent_lock);
1342
1343         spin_lock(&sbi->ll_process_lock);
1344         /* Offset statistics */
1345         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1346                 if (process[i].rw_pid == pid) {
1347                         if (process[i].rw_last_file != file) {
1348                                 process[i].rw_range_start = pos;
1349                                 process[i].rw_last_file_pos = pos + count;
1350                                 process[i].rw_smallest_extent = count;
1351                                 process[i].rw_largest_extent = count;
1352                                 process[i].rw_offset = 0;
1353                                 process[i].rw_last_file = file;
1354                                 spin_unlock(&sbi->ll_process_lock);
1355                                 return;
1356                         }
1357                         if (process[i].rw_last_file_pos != pos) {
1358                                 *off_count =
1359                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1360                                 offset[*off_count].rw_op = process[i].rw_op;
1361                                 offset[*off_count].rw_pid = pid;
1362                                 offset[*off_count].rw_range_start =
1363                                         process[i].rw_range_start;
1364                                 offset[*off_count].rw_range_end =
1365                                         process[i].rw_last_file_pos;
1366                                 offset[*off_count].rw_smallest_extent =
1367                                         process[i].rw_smallest_extent;
1368                                 offset[*off_count].rw_largest_extent =
1369                                         process[i].rw_largest_extent;
1370                                 offset[*off_count].rw_offset =
1371                                         process[i].rw_offset;
1372                                 process[i].rw_op = rw;
1373                                 process[i].rw_range_start = pos;
1374                                 process[i].rw_smallest_extent = count;
1375                                 process[i].rw_largest_extent = count;
1376                                 process[i].rw_offset = pos -
1377                                         process[i].rw_last_file_pos;
1378                         }
1379                         if(process[i].rw_smallest_extent > count)
1380                                 process[i].rw_smallest_extent = count;
1381                         if(process[i].rw_largest_extent < count)
1382                                 process[i].rw_largest_extent = count;
1383                         process[i].rw_last_file_pos = pos + count;
1384                         spin_unlock(&sbi->ll_process_lock);
1385                         return;
1386                 }
1387         }
1388         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1389         process[*process_count].rw_pid = pid;
1390         process[*process_count].rw_op = rw;
1391         process[*process_count].rw_range_start = pos;
1392         process[*process_count].rw_last_file_pos = pos + count;
1393         process[*process_count].rw_smallest_extent = count;
1394         process[*process_count].rw_largest_extent = count;
1395         process[*process_count].rw_offset = 0;
1396         process[*process_count].rw_last_file = file;
1397         spin_unlock(&sbi->ll_process_lock);
1398 }
1399
1400 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1401 {
1402         struct timeval now;
1403         struct ll_sb_info *sbi = seq->private;
1404         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1405         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1406         int i;
1407
1408         do_gettimeofday(&now);
1409
1410         if (!sbi->ll_rw_stats_on) {
1411                 seq_printf(seq, "disabled\n"
1412                                 "write anything in this file to activate, "
1413                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1414                 return 0;
1415         }
1416         spin_lock(&sbi->ll_process_lock);
1417
1418         seq_printf(seq, "snapshot_time:  %lu.%lu (secs.usecs)\n",
1419                    now.tv_sec, (unsigned long)now.tv_usec);
1420         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1421                    "R/W", "PID", "RANGE START", "RANGE END",
1422                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1423         /* We stored the discontiguous offsets here; print them first */
1424         for(i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1425                 if (offset[i].rw_pid != 0)
1426                         seq_printf(seq,
1427                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1428                                    offset[i].rw_op == READ ? 'R' : 'W',
1429                                    offset[i].rw_pid,
1430                                    offset[i].rw_range_start,
1431                                    offset[i].rw_range_end,
1432                                    (unsigned long)offset[i].rw_smallest_extent,
1433                                    (unsigned long)offset[i].rw_largest_extent,
1434                                    offset[i].rw_offset);
1435         }
1436         /* Then print the current offsets for each process */
1437         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1438                 if (process[i].rw_pid != 0)
1439                         seq_printf(seq,
1440                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1441                                    process[i].rw_op == READ ? 'R' : 'W',
1442                                    process[i].rw_pid,
1443                                    process[i].rw_range_start,
1444                                    process[i].rw_last_file_pos,
1445                                    (unsigned long)process[i].rw_smallest_extent,
1446                                    (unsigned long)process[i].rw_largest_extent,
1447                                    process[i].rw_offset);
1448         }
1449         spin_unlock(&sbi->ll_process_lock);
1450
1451         return 0;
1452 }
1453
1454 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
1455                                             const char __user *buf,
1456                                             size_t len, loff_t *off)
1457 {
1458         struct seq_file *seq = file->private_data;
1459         struct ll_sb_info *sbi = seq->private;
1460         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1461         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1462         int value = 1, rc = 0;
1463
1464         if (len == 0)
1465                 return -EINVAL;
1466
1467         rc = lprocfs_write_helper(buf, len, &value);
1468
1469         if (rc < 0 && len < 16) {
1470                 char kernbuf[16];
1471
1472                 if (copy_from_user(kernbuf, buf, len))
1473                         return -EFAULT;
1474                 kernbuf[len] = 0;
1475
1476                 if (kernbuf[len - 1] == '\n')
1477                         kernbuf[len - 1] = 0;
1478
1479                 if (strcmp(kernbuf, "disabled") == 0 ||
1480                     strcmp(kernbuf, "Disabled") == 0)
1481                         value = 0;
1482         }
1483
1484         if (value == 0)
1485                 sbi->ll_rw_stats_on = 0;
1486         else
1487                 sbi->ll_rw_stats_on = 1;
1488
1489         spin_lock(&sbi->ll_process_lock);
1490         sbi->ll_offset_process_count = 0;
1491         sbi->ll_rw_offset_entry_count = 0;
1492         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1493                LL_PROCESS_HIST_MAX);
1494         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1495                LL_OFFSET_HIST_MAX);
1496         spin_unlock(&sbi->ll_process_lock);
1497
1498         return len;
1499 }
1500
1501 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1502
1503 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
1504 {
1505     lvars->module_vars  = NULL;
1506     lvars->obd_vars     = lprocfs_llite_obd_vars;
1507 }