lustre/llite/lproc_llite.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2012, 2013, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36 #define DEBUG_SUBSYSTEM S_LLITE
  37
  38 #include <linux/version.h>
  39 #include <lustre_lite.h>
  40 #include <lustre_param.h>
  41 #include <lprocfs_status.h>
  42 #include <obd_support.h>
  43
  44 #include "llite_internal.h"
  45
  46 struct proc_dir_entry *proc_lustre_fs_root;
  47
  48 #ifdef LPROCFS
  49 /* /proc/lustre/llite mount point registration */
  50 extern struct file_operations vvp_dump_pgcache_file_ops;
  51 struct file_operations ll_rw_extents_stats_fops;
  52 struct file_operations ll_rw_extents_stats_pp_fops;
  53 struct file_operations ll_rw_offset_stats_fops;
  54
  55 static int ll_blksize_seq_show(struct seq_file *m, void *v)
  56 {
  57         struct super_block *sb = m->private;
  58         struct obd_statfs osfs;
  59         int rc;
  60
  61         LASSERT(sb != NULL);
  62         rc = ll_statfs_internal(sb, &osfs,
  63                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  64                                 OBD_STATFS_NODELAY);
  65         if (!rc)
  66                 rc = seq_printf(m, "%u\n", osfs.os_bsize);
  67         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 = 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 = 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 = 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 = 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 = 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         return rc;
 184 }
 185 LPROC_SEQ_FOPS_RO(ll_client_type);
 186
 187 static int ll_fstype_seq_show(struct seq_file *m, void *v)
 188 {
 189         struct super_block *sb = m->private;
 190
 191         LASSERT(sb != NULL);
 192         return seq_printf(m, "%s\n", sb->s_type->name);
 193 }
 194 LPROC_SEQ_FOPS_RO(ll_fstype);
 195
 196 static int ll_sb_uuid_seq_show(struct seq_file *m, void *v)
 197 {
 198         struct super_block *sb = m->private;
 199
 200         LASSERT(sb != NULL);
 201         return seq_printf(m, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
 202 }
 203 LPROC_SEQ_FOPS_RO(ll_sb_uuid);
 204
 205 static int ll_xattr_cache_seq_show(struct seq_file *m, void *v)
 206 {
 207         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 208
 209         return seq_printf(m, "%u\n", sbi->ll_xattr_cache_enabled);
 210 }
 211
 212 static ssize_t ll_xattr_cache_seq_write(struct file *file, const char *buffer,
 213                                         size_t count, loff_t *off)
 214 {
 215         struct seq_file *m = file->private_data;
 216         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 217         int val, rc;
 218
 219         rc = lprocfs_write_helper(buffer, count, &val);
 220         if (rc)
 221                 return rc;
 222
 223         if (val != 0 && val != 1)
 224                 return -ERANGE;
 225
 226         if (val == 1 && !(sbi->ll_flags & LL_SBI_XATTR_CACHE))
 227                 return -ENOTSUPP;
 228
 229         sbi->ll_xattr_cache_enabled = val;
 230
 231         return count;
 232 }
 233 LPROC_SEQ_FOPS(ll_xattr_cache);
 234
 235 static int ll_site_stats_seq_show(struct seq_file *m, void *v)
 236 {
 237         struct super_block *sb = m->private;
 238
 239         /*
 240          * See description of statistical counters in struct cl_site, and
 241          * struct lu_site.
 242          */
 243         return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site), m);
 244 }
 245 LPROC_SEQ_FOPS_RO(ll_site_stats);
 246
 247 static int ll_max_readahead_mb_seq_show(struct seq_file *m, void *v)
 248 {
 249         struct super_block *sb = m->private;
 250         struct ll_sb_info *sbi = ll_s2sbi(sb);
 251         long pages_number;
 252         int mult;
 253
 254         spin_lock(&sbi->ll_lock);
 255         pages_number = sbi->ll_ra_info.ra_max_pages;
 256         spin_unlock(&sbi->ll_lock);
 257
 258         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 259         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 260 }
 261
 262 static ssize_t
 263 ll_max_readahead_mb_seq_write(struct file *file, const char *buffer,
 264                               size_t count, loff_t *off)
 265 {
 266         struct seq_file *m = file->private_data;
 267         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 268         int mult, rc, pages_number;
 269
 270         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 271         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 272         if (rc)
 273                 return rc;
 274
 275         if (pages_number < 0 || pages_number > totalram_pages / 2) {
 276                 /* 1/2 of RAM */
 277                 CERROR("can't set file readahead more than %lu MB\n",
 278                        totalram_pages >> (20 - PAGE_CACHE_SHIFT + 1));
 279                 return -ERANGE;
 280         }
 281
 282         spin_lock(&sbi->ll_lock);
 283         sbi->ll_ra_info.ra_max_pages = pages_number;
 284         spin_unlock(&sbi->ll_lock);
 285         return count;
 286 }
 287 LPROC_SEQ_FOPS(ll_max_readahead_mb);
 288
 289 static int ll_max_readahead_per_file_mb_seq_show(struct seq_file *m, void *v)
 290 {
 291         struct super_block *sb = m->private;
 292         struct ll_sb_info *sbi = ll_s2sbi(sb);
 293         long pages_number;
 294         int mult;
 295
 296         spin_lock(&sbi->ll_lock);
 297         pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
 298         spin_unlock(&sbi->ll_lock);
 299
 300         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 301         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 302 }
 303
 304 static ssize_t
 305 ll_max_readahead_per_file_mb_seq_write(struct file *file, const char *buffer,
 306                                        size_t count, loff_t *off)
 307 {
 308         struct seq_file *m = file->private_data;
 309         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 310         int mult, rc, pages_number;
 311
 312         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 313         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 314         if (rc)
 315                 return rc;
 316
 317         if (pages_number < 0 ||
 318             pages_number > sbi->ll_ra_info.ra_max_pages) {
 319                 CERROR("can't set file readahead more than"
 320                        "max_read_ahead_mb %lu MB\n",
 321                        sbi->ll_ra_info.ra_max_pages);
 322                 return -ERANGE;
 323         }
 324
 325         spin_lock(&sbi->ll_lock);
 326         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 327         spin_unlock(&sbi->ll_lock);
 328         return count;
 329 }
 330 LPROC_SEQ_FOPS(ll_max_readahead_per_file_mb);
 331
 332 static int ll_max_read_ahead_whole_mb_seq_show(struct seq_file *m, void *v)
 333 {
 334         struct super_block *sb = m->private;
 335         struct ll_sb_info *sbi = ll_s2sbi(sb);
 336         long pages_number;
 337         int mult;
 338
 339         spin_lock(&sbi->ll_lock);
 340         pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
 341         spin_unlock(&sbi->ll_lock);
 342
 343         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 344         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 345 }
 346
 347 static ssize_t
 348 ll_max_read_ahead_whole_mb_seq_write(struct file *file, const char *buffer,
 349                                      size_t count, loff_t *off)
 350 {
 351         struct seq_file *m = file->private_data;
 352         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 353         int mult, rc, pages_number;
 354
 355         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 356         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 357         if (rc)
 358                 return rc;
 359
 360         /* Cap this at the current max readahead window size, the readahead
 361          * algorithm does this anyway so it's pointless to set it larger. */
 362         if (pages_number < 0 ||
 363             pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
 364                 CERROR("can't set max_read_ahead_whole_mb more than "
 365                        "max_read_ahead_per_file_mb: %lu\n",
 366                         sbi->ll_ra_info.ra_max_pages_per_file >>
 367                         (20 - PAGE_CACHE_SHIFT));
 368                 return -ERANGE;
 369         }
 370
 371         spin_lock(&sbi->ll_lock);
 372         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 373         spin_unlock(&sbi->ll_lock);
 374         return count;
 375 }
 376 LPROC_SEQ_FOPS(ll_max_read_ahead_whole_mb);
 377
 378 static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v)
 379 {
 380         struct super_block     *sb    = m->private;
 381         struct ll_sb_info      *sbi   = ll_s2sbi(sb);
 382         struct cl_client_cache *cache = &sbi->ll_cache;
 383         int shift = 20 - PAGE_CACHE_SHIFT;
 384         int max_cached_mb;
 385         int unused_mb;
 386
 387         max_cached_mb = cache->ccc_lru_max >> shift;
 388         unused_mb = cfs_atomic_read(&cache->ccc_lru_left) >> shift;
 389         return seq_printf(m,
 390                         "users: %d\n"
 391                         "max_cached_mb: %d\n"
 392                         "used_mb: %d\n"
 393                         "unused_mb: %d\n"
 394                         "reclaim_count: %u\n",
 395                         cfs_atomic_read(&cache->ccc_users),
 396                         max_cached_mb,
 397                         max_cached_mb - unused_mb,
 398                         unused_mb,
 399                         cache->ccc_lru_shrinkers);
 400 }
 401
 402 static ssize_t
 403 ll_max_cached_mb_seq_write(struct file *file, const char *buffer,
 404                            size_t count, loff_t *off)
 405 {
 406         struct seq_file *m = file->private_data;
 407         struct super_block *sb = m->private;
 408         struct ll_sb_info *sbi = ll_s2sbi(sb);
 409         struct cl_client_cache *cache = &sbi->ll_cache;
 410         struct lu_env *env;
 411         int refcheck;
 412         int mult, rc, pages_number;
 413         int diff = 0;
 414         int nrpages = 0;
 415         ENTRY;
 416
 417         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 418         buffer = lprocfs_find_named_value(buffer, "max_cached_mb:", &count);
 419         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 420         if (rc)
 421                 RETURN(rc);
 422
 423         if (pages_number < 0 || pages_number > totalram_pages) {
 424                 CERROR("%s: can't set max cache more than %lu MB\n",
 425                        ll_get_fsname(sb, NULL, 0),
 426                        totalram_pages >> (20 - PAGE_CACHE_SHIFT));
 427                 RETURN(-ERANGE);
 428         }
 429
 430         if (sbi->ll_dt_exp == NULL) /* being initialized */
 431                 GOTO(out, rc = 0);
 432
 433         spin_lock(&sbi->ll_lock);
 434         diff = pages_number - cache->ccc_lru_max;
 435         spin_unlock(&sbi->ll_lock);
 436
 437         /* easy - add more LRU slots. */
 438         if (diff >= 0) {
 439                 cfs_atomic_add(diff, &cache->ccc_lru_left);
 440                 GOTO(out, rc = 0);
 441         }
 442
 443         env = cl_env_get(&refcheck);
 444         if (IS_ERR(env))
 445                 RETURN(rc);
 446
 447         diff = -diff;
 448         while (diff > 0) {
 449                 int tmp;
 450
 451                 /* reduce LRU budget from free slots. */
 452                 do {
 453                         int ov, nv;
 454
 455                         ov = cfs_atomic_read(&cache->ccc_lru_left);
 456                         if (ov == 0)
 457                                 break;
 458
 459                         nv = ov > diff ? ov - diff : 0;
 460                         rc = cfs_atomic_cmpxchg(&cache->ccc_lru_left, ov, nv);
 461                         if (likely(ov == rc)) {
 462                                 diff -= ov - nv;
 463                                 nrpages += ov - nv;
 464                                 break;
 465                         }
 466                 } while (1);
 467
 468                 if (diff <= 0)
 469                         break;
 470
 471                 /* difficult - have to ask OSCs to drop LRU slots. */
 472                 tmp = diff << 1;
 473                 rc = obd_set_info_async(env, sbi->ll_dt_exp,
 474                                 sizeof(KEY_CACHE_LRU_SHRINK),
 475                                 KEY_CACHE_LRU_SHRINK,
 476                                 sizeof(tmp), &tmp, NULL);
 477                 if (rc < 0)
 478                         break;
 479         }
 480         cl_env_put(env, &refcheck);
 481
 482 out:
 483         if (rc >= 0) {
 484                 spin_lock(&sbi->ll_lock);
 485                 cache->ccc_lru_max = pages_number;
 486                 spin_unlock(&sbi->ll_lock);
 487                 rc = count;
 488         } else {
 489                 cfs_atomic_add(nrpages, &cache->ccc_lru_left);
 490         }
 491         return rc;
 492 }
 493 LPROC_SEQ_FOPS(ll_max_cached_mb);
 494
 495 static int ll_checksum_seq_show(struct seq_file *m, void *v)
 496 {
 497         struct super_block *sb = m->private;
 498         struct ll_sb_info *sbi = ll_s2sbi(sb);
 499
 500         return seq_printf(m, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 501 }
 502
 503 static ssize_t ll_checksum_seq_write(struct file *file, const char *buffer,
 504                                      size_t count, loff_t *off)
 505 {
 506         struct seq_file *m = file->private_data;
 507         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 508         int val, rc;
 509
 510         if (!sbi->ll_dt_exp)
 511                 /* Not set up yet */
 512                 return -EAGAIN;
 513
 514         rc = lprocfs_write_helper(buffer, count, &val);
 515         if (rc)
 516                 return rc;
 517         if (val)
 518                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 519         else
 520                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 521
 522         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 523                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 524         if (rc)
 525                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 526
 527         return count;
 528 }
 529 LPROC_SEQ_FOPS(ll_checksum);
 530
 531 static int ll_max_rw_chunk_seq_show(struct seq_file *m, void *v)
 532 {
 533         struct super_block *sb = m->private;
 534
 535         return seq_printf(m, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk);
 536 }
 537
 538 static ssize_t ll_max_rw_chunk_seq_write(struct file *file, const char *buffer,
 539                                          size_t count, loff_t *off)
 540 {
 541         struct seq_file *m = file->private_data;
 542         struct super_block *sb = m->private;
 543         int rc, val;
 544
 545         rc = lprocfs_write_helper(buffer, count, &val);
 546         if (rc)
 547                 return rc;
 548         ll_s2sbi(sb)->ll_max_rw_chunk = val;
 549         return count;
 550 }
 551 LPROC_SEQ_FOPS(ll_max_rw_chunk);
 552
 553 static int ll_rd_track_id(struct seq_file *m, enum stats_track_type type)
 554 {
 555         struct super_block *sb = m->private;
 556
 557         if (ll_s2sbi(sb)->ll_stats_track_type == type) {
 558                 return seq_printf(m, "%d\n",
 559                                   ll_s2sbi(sb)->ll_stats_track_id);
 560         } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
 561                 return seq_printf(m, "0 (all)\n");
 562         } else {
 563                 return seq_printf(m, "untracked\n");
 564         }
 565 }
 566
 567 static int ll_wr_track_id(const char *buffer, unsigned long count, void *data,
 568                           enum stats_track_type type)
 569 {
 570         struct super_block *sb = data;
 571         int rc, pid;
 572
 573         rc = lprocfs_write_helper(buffer, count, &pid);
 574         if (rc)
 575                 return rc;
 576         ll_s2sbi(sb)->ll_stats_track_id = pid;
 577         if (pid == 0)
 578                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 579         else
 580                 ll_s2sbi(sb)->ll_stats_track_type = type;
 581         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 582         return count;
 583 }
 584
 585 static int ll_track_pid_seq_show(struct seq_file *m, void *v)
 586 {
 587         return ll_rd_track_id(m, STATS_TRACK_PID);
 588 }
 589
 590 static ssize_t ll_track_pid_seq_write(struct file *file, const char *buffer,
 591                                       size_t count, loff_t *off)
 592 {
 593         struct seq_file *seq = file->private_data;
 594         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PID);
 595 }
 596 LPROC_SEQ_FOPS(ll_track_pid);
 597
 598 static int ll_track_ppid_seq_show(struct seq_file *m, void *v)
 599 {
 600         return ll_rd_track_id(m, STATS_TRACK_PPID);
 601 }
 602
 603 static ssize_t ll_track_ppid_seq_write(struct file *file, const char *buffer,
 604                                        size_t count, loff_t *off)
 605 {
 606         struct seq_file *seq = file->private_data;
 607         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PPID);
 608 }
 609 LPROC_SEQ_FOPS(ll_track_ppid);
 610
 611 static int ll_track_gid_seq_show(struct seq_file *m, void *v)
 612 {
 613         return ll_rd_track_id(m, STATS_TRACK_GID);
 614 }
 615
 616 static ssize_t ll_track_gid_seq_write(struct file *file, const char *buffer,
 617                                       size_t count, loff_t *off)
 618 {
 619         struct seq_file *seq = file->private_data;
 620         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_GID);
 621 }
 622 LPROC_SEQ_FOPS(ll_track_gid);
 623
 624 static int ll_statahead_max_seq_show(struct seq_file *m, void *v)
 625 {
 626         struct super_block *sb = m->private;
 627         struct ll_sb_info *sbi = ll_s2sbi(sb);
 628
 629         return seq_printf(m, "%u\n", sbi->ll_sa_max);
 630 }
 631
 632 static ssize_t ll_statahead_max_seq_write(struct file *file, const char *buffer,
 633                                           size_t count, loff_t *off)
 634 {
 635         struct seq_file *m = file->private_data;
 636         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 637         int val, rc;
 638
 639         rc = lprocfs_write_helper(buffer, count, &val);
 640         if (rc)
 641                 return rc;
 642
 643         if (val >= 0 && val <= LL_SA_RPC_MAX)
 644                 sbi->ll_sa_max = val;
 645         else
 646                 CERROR("Bad statahead_max value %d. Valid values are in the "
 647                        "range [0, %d]\n", val, LL_SA_RPC_MAX);
 648
 649         return count;
 650 }
 651 LPROC_SEQ_FOPS(ll_statahead_max);
 652
 653 static int ll_statahead_agl_seq_show(struct seq_file *m, void *v)
 654 {
 655         struct super_block *sb = m->private;
 656         struct ll_sb_info *sbi = ll_s2sbi(sb);
 657
 658         return seq_printf(m, "%u\n",
 659                           sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
 660 }
 661
 662 static ssize_t ll_statahead_agl_seq_write(struct file *file, const char *buffer,
 663                                           size_t count, loff_t *off)
 664 {
 665         struct seq_file *m = file->private_data;
 666         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 667         int val, rc;
 668
 669         rc = lprocfs_write_helper(buffer, count, &val);
 670         if (rc)
 671                 return rc;
 672
 673         if (val)
 674                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 675         else
 676                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
 677
 678         return count;
 679 }
 680 LPROC_SEQ_FOPS(ll_statahead_agl);
 681
 682 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
 683 {
 684         struct super_block *sb = m->private;
 685         struct ll_sb_info *sbi = ll_s2sbi(sb);
 686
 687         return seq_printf(m,
 688                         "statahead total: %u\n"
 689                         "statahead wrong: %u\n"
 690                         "agl total: %u\n",
 691                         atomic_read(&sbi->ll_sa_total),
 692                         atomic_read(&sbi->ll_sa_wrong),
 693                         atomic_read(&sbi->ll_agl_total));
 694 }
 695 LPROC_SEQ_FOPS_RO(ll_statahead_stats);
 696
 697 static int ll_lazystatfs_seq_show(struct seq_file *m, void *v)
 698 {
 699         struct super_block *sb = m->private;
 700         struct ll_sb_info *sbi = ll_s2sbi(sb);
 701
 702         return seq_printf(m, "%u\n",
 703                           (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 704 }
 705
 706 static ssize_t ll_lazystatfs_seq_write(struct file *file, const char *buffer,
 707                                         size_t count, loff_t *off)
 708 {
 709         struct seq_file *m = file->private_data;
 710         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 711         int val, rc;
 712
 713         rc = lprocfs_write_helper(buffer, count, &val);
 714         if (rc)
 715                 return rc;
 716
 717         if (val)
 718                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 719         else
 720                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 721
 722         return count;
 723 }
 724 LPROC_SEQ_FOPS(ll_lazystatfs);
 725
 726 static int ll_maxea_size_seq_show(struct seq_file *m, void *v)
 727 {
 728         struct super_block *sb = m->private;
 729         struct ll_sb_info *sbi = ll_s2sbi(sb);
 730         unsigned int ealen;
 731         int rc;
 732
 733         rc = ll_get_max_mdsize(sbi, &ealen);
 734         if (rc)
 735                 return rc;
 736
 737         return seq_printf(m, "%u\n", ealen);
 738 }
 739 LPROC_SEQ_FOPS_RO(ll_maxea_size);
 740
 741 static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
 742 {
 743         const char *str[] = LL_SBI_FLAGS;
 744         struct super_block *sb = m->private;
 745         int flags = ll_s2sbi(sb)->ll_flags;
 746         int i = 0;
 747
 748         while (flags != 0) {
 749                 if (ARRAY_SIZE(str) <= i) {
 750                         CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
 751                                 "flags please.\n", ll_get_fsname(sb, NULL, 0));
 752                         return -EINVAL;
 753                 }
 754
 755                 if (flags & 0x1)
 756                         seq_printf(m, "%s ", str[i]);
 757                 flags >>= 1;
 758                 ++i;
 759         }
 760         seq_printf(m, "\b\n");
 761         return 0;
 762 }
 763 LPROC_SEQ_FOPS_RO(ll_sbi_flags);
 764
 765 static int ll_unstable_stats_seq_show(struct seq_file *m, void *v)
 766 {
 767         struct super_block      *sb    = m->private;
 768         struct ll_sb_info       *sbi   = ll_s2sbi(sb);
 769         struct cl_client_cache  *cache = &sbi->ll_cache;
 770         int pages, mb;
 771
 772         pages = cfs_atomic_read(&cache->ccc_unstable_nr);
 773         mb    = (pages * PAGE_CACHE_SIZE) >> 20;
 774
 775         return seq_printf(m, "unstable_pages: %8d\n"
 776                                 "unstable_mb:    %8d\n", pages, mb);
 777 }
 778 LPROC_SEQ_FOPS_RO(ll_unstable_stats);
 779
 780 struct lprocfs_seq_vars lprocfs_llite_obd_vars[] = {
 781         { .name =       "uuid",
 782           .fops =       &ll_sb_uuid_fops                        },
 783         { .name =       "fstype",
 784           .fops =       &ll_fstype_fops                         },
 785         { .name =       "site",
 786           .fops =       &ll_site_stats_fops                     },
 787         { .name =       "blocksize",
 788           .fops =       &ll_blksize_fops                        },
 789         { .name =       "kbytestotal",
 790           .fops =       &ll_kbytestotal_fops                    },
 791         { .name =       "kbytesfree",
 792           .fops =       &ll_kbytesfree_fops                     },
 793         { .name =       "kbytesavail",
 794           .fops =       &ll_kbytesavail_fops                    },
 795         { .name =       "filestotal",
 796           .fops =       &ll_filestotal_fops                     },
 797         { .name =       "filesfree",
 798           .fops =       &ll_filesfree_fops                      },
 799         { .name =       "client_type",
 800           .fops =       &ll_client_type_fops                    },
 801         { .name =       "max_read_ahead_mb",
 802           .fops =       &ll_max_readahead_mb_fops               },
 803         { .name =       "max_read_ahead_per_file_mb",
 804           .fops =       &ll_max_readahead_per_file_mb_fops      },
 805         { .name =       "max_read_ahead_whole_mb",
 806           .fops =       &ll_max_read_ahead_whole_mb_fops        },
 807         { .name =       "max_cached_mb",
 808           .fops =       &ll_max_cached_mb_fops                  },
 809         { .name =       "checksum_pages",
 810           .fops =       &ll_checksum_fops                       },
 811         { .name =       "max_rw_chunk",
 812           .fops =       &ll_max_rw_chunk_fops                   },
 813         { .name =       "stats_track_pid",
 814           .fops =       &ll_track_pid_fops                      },
 815         { .name =       "stats_track_ppid",
 816           .fops =       &ll_track_ppid_fops                     },
 817         { .name =       "stats_track_gid",
 818           .fops =       &ll_track_gid_fops                      },
 819         { .name =       "statahead_max",
 820           .fops =       &ll_statahead_max_fops                  },
 821         { .name =       "statahead_agl",
 822           .fops =       &ll_statahead_agl_fops                  },
 823         { .name =       "statahead_stats",
 824           .fops =       &ll_statahead_stats_fops                },
 825         { .name =       "lazystatfs",
 826           .fops =       &ll_lazystatfs_fops                     },
 827         { .name =       "max_easize",
 828           .fops =       &ll_maxea_size_fops                     },
 829         { .name =       "sbi_flags",
 830           .fops =       &ll_sbi_flags_fops                      },
 831         { .name =       "xattr_cache",
 832           .fops =       &ll_xattr_cache_fops                    },
 833         { .name =       "unstable_stats",
 834           .fops =       &ll_unstable_stats_fops                 },
 835         { 0 }
 836 };
 837
 838 #define MAX_STRING_SIZE 128
 839
 840 struct llite_file_opcode {
 841         __u32       opcode;
 842         __u32       type;
 843         const char *opname;
 844 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 845         /* file operation */
 846         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 847         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 848         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 849                                    "read_bytes" },
 850         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 851                                    "write_bytes" },
 852         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 853                                    "brw_read" },
 854         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 855                                    "brw_write" },
 856         { LPROC_LL_OSC_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 857                                    "osc_read" },
 858         { LPROC_LL_OSC_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 859                                    "osc_write" },
 860         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
 861         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 862         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
 863         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
 864         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
 865         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
 866         { LPROC_LL_READDIR,        LPROCFS_TYPE_REGS, "readdir" },
 867         /* inode operation */
 868         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
 869         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "truncate" },
 870         { LPROC_LL_FLOCK,          LPROCFS_TYPE_REGS, "flock" },
 871         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
 872         /* dir inode operation */
 873         { LPROC_LL_CREATE,         LPROCFS_TYPE_REGS, "create" },
 874         { LPROC_LL_LINK,           LPROCFS_TYPE_REGS, "link" },
 875         { LPROC_LL_UNLINK,         LPROCFS_TYPE_REGS, "unlink" },
 876         { LPROC_LL_SYMLINK,        LPROCFS_TYPE_REGS, "symlink" },
 877         { LPROC_LL_MKDIR,          LPROCFS_TYPE_REGS, "mkdir" },
 878         { LPROC_LL_RMDIR,          LPROCFS_TYPE_REGS, "rmdir" },
 879         { LPROC_LL_MKNOD,          LPROCFS_TYPE_REGS, "mknod" },
 880         { LPROC_LL_RENAME,         LPROCFS_TYPE_REGS, "rename" },
 881         /* special inode operation */
 882         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
 883         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 884         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 885         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 886         { LPROC_LL_GETXATTR_HITS,  LPROCFS_TYPE_REGS, "getxattr_hits" },
 887         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
 888         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
 889         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
 890 };
 891
 892 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 893 {
 894         if (!sbi->ll_stats)
 895                 return;
 896         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 897                 lprocfs_counter_add(sbi->ll_stats, op, count);
 898         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
 899                  sbi->ll_stats_track_id == current->pid)
 900                 lprocfs_counter_add(sbi->ll_stats, op, count);
 901         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
 902                  sbi->ll_stats_track_id == current->parent->pid)
 903                 lprocfs_counter_add(sbi->ll_stats, op, count);
 904         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 905                  sbi->ll_stats_track_id == current_gid())
 906                 lprocfs_counter_add(sbi->ll_stats, op, count);
 907 }
 908 EXPORT_SYMBOL(ll_stats_ops_tally);
 909
 910 static const char *ra_stat_string[] = {
 911         [RA_STAT_HIT] = "hits",
 912         [RA_STAT_MISS] = "misses",
 913         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 914         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 915         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
 916         [RA_STAT_FAILED_MATCH] = "failed lock match",
 917         [RA_STAT_DISCARDED] = "read but discarded",
 918         [RA_STAT_ZERO_LEN] = "zero length file",
 919         [RA_STAT_ZERO_WINDOW] = "zero size window",
 920         [RA_STAT_EOF] = "read-ahead to EOF",
 921         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 922         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
 923 };
 924
 925 LPROC_SEQ_FOPS_RO_TYPE(llite, name);
 926 LPROC_SEQ_FOPS_RO_TYPE(llite, uuid);
 927
 928 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 929                                 struct super_block *sb, char *osc, char *mdc)
 930 {
 931         struct lprocfs_seq_vars lvars[2];
 932         struct lustre_sb_info *lsi = s2lsi(sb);
 933         struct ll_sb_info *sbi = ll_s2sbi(sb);
 934         struct obd_device *obd;
 935         struct proc_dir_entry *dir;
 936         char name[MAX_STRING_SIZE + 1], *ptr;
 937         int err, id, len, rc;
 938         ENTRY;
 939
 940         memset(lvars, 0, sizeof(lvars));
 941
 942         name[MAX_STRING_SIZE] = '\0';
 943         lvars[0].name = name;
 944
 945         LASSERT(sbi != NULL);
 946         LASSERT(mdc != NULL);
 947         LASSERT(osc != NULL);
 948
 949         /* Get fsname */
 950         len = strlen(lsi->lsi_lmd->lmd_profile);
 951         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
 952         if (ptr && (strcmp(ptr, "-client") == 0))
 953                 len -= 7;
 954
 955         /* Mount info */
 956         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
 957                  lsi->lsi_lmd->lmd_profile, sb);
 958
 959         sbi->ll_proc_root = lprocfs_seq_register(name, parent, NULL, NULL);
 960         if (IS_ERR(sbi->ll_proc_root)) {
 961                 err = PTR_ERR(sbi->ll_proc_root);
 962                 sbi->ll_proc_root = NULL;
 963                 RETURN(err);
 964         }
 965
 966         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
 967                                 &vvp_dump_pgcache_file_ops, sbi);
 968         if (rc)
 969                 CWARN("Error adding the dump_page_cache file\n");
 970
 971         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
 972                                 &ll_rw_extents_stats_fops, sbi);
 973         if (rc)
 974                 CWARN("Error adding the extent_stats file\n");
 975
 976         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
 977                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
 978         if (rc)
 979                 CWARN("Error adding the extents_stats_per_process file\n");
 980
 981         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
 982                                 &ll_rw_offset_stats_fops, sbi);
 983         if (rc)
 984                 CWARN("Error adding the offset_stats file\n");
 985
 986         /* File operations stats */
 987         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
 988                                             LPROCFS_STATS_FLAG_NONE);
 989         if (sbi->ll_stats == NULL)
 990                 GOTO(out, err = -ENOMEM);
 991         /* do counter init */
 992         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
 993                 __u32 type = llite_opcode_table[id].type;
 994                 void *ptr = NULL;
 995                 if (type & LPROCFS_TYPE_REGS)
 996                         ptr = "regs";
 997                 else if (type & LPROCFS_TYPE_BYTES)
 998                         ptr = "bytes";
 999                 else if (type & LPROCFS_TYPE_PAGES)
1000                         ptr = "pages";
1001                 lprocfs_counter_init(sbi->ll_stats,
1002                                      llite_opcode_table[id].opcode,
1003                                      (type & LPROCFS_CNTR_AVGMINMAX),
1004                                      llite_opcode_table[id].opname, ptr);
1005         }
1006         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
1007         if (err)
1008                 GOTO(out, err);
1009
1010         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1011                                                LPROCFS_STATS_FLAG_NONE);
1012         if (sbi->ll_ra_stats == NULL)
1013                 GOTO(out, err = -ENOMEM);
1014
1015         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1016                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
1017                                      ra_stat_string[id], "pages");
1018         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
1019                                      sbi->ll_ra_stats);
1020         if (err)
1021                 GOTO(out, err);
1022
1023
1024         err = lprocfs_seq_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
1025         if (err)
1026                 GOTO(out, err);
1027
1028         /* MDC info */
1029         obd = class_name2obd(mdc);
1030
1031         LASSERT(obd != NULL);
1032         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1033         LASSERT(obd->obd_type->typ_name != NULL);
1034
1035         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1036         if (dir == NULL)
1037                 GOTO(out, err = -ENOMEM);
1038
1039         snprintf(name, MAX_STRING_SIZE, "common_name");
1040         lvars[0].fops = &llite_name_fops;
1041         err = lprocfs_seq_add_vars(dir, lvars, obd);
1042         if (err)
1043                 GOTO(out, err);
1044
1045         snprintf(name, MAX_STRING_SIZE, "uuid");
1046         lvars[0].fops = &llite_uuid_fops;
1047         err = lprocfs_seq_add_vars(dir, lvars, obd);
1048         if (err)
1049                 GOTO(out, err);
1050
1051         /* OSC */
1052         obd = class_name2obd(osc);
1053
1054         LASSERT(obd != NULL);
1055         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1056         LASSERT(obd->obd_type->typ_name != NULL);
1057
1058         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1059         if (dir == NULL)
1060                 GOTO(out, err = -ENOMEM);
1061
1062         snprintf(name, MAX_STRING_SIZE, "common_name");
1063         lvars[0].fops = &llite_name_fops;
1064         err = lprocfs_seq_add_vars(dir, lvars, obd);
1065         if (err)
1066                 GOTO(out, err);
1067
1068         snprintf(name, MAX_STRING_SIZE, "uuid");
1069         lvars[0].fops = &llite_uuid_fops;
1070         err = lprocfs_seq_add_vars(dir, lvars, obd);
1071 out:
1072         if (err) {
1073                 lprocfs_remove(&sbi->ll_proc_root);
1074                 lprocfs_free_stats(&sbi->ll_ra_stats);
1075                 lprocfs_free_stats(&sbi->ll_stats);
1076         }
1077         RETURN(err);
1078 }
1079
1080 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
1081 {
1082         if (sbi->ll_proc_root) {
1083                 lprocfs_remove(&sbi->ll_proc_root);
1084                 lprocfs_free_stats(&sbi->ll_ra_stats);
1085                 lprocfs_free_stats(&sbi->ll_stats);
1086         }
1087 }
1088 #undef MAX_STRING_SIZE
1089
1090 #define pct(a,b) (b ? a * 100 / b : 0)
1091
1092 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1093                                    struct seq_file *seq, int which)
1094 {
1095         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1096         unsigned long start, end, r, w;
1097         char *unitp = "KMGTPEZY";
1098         int i, units = 10;
1099         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1100
1101         read_cum = 0;
1102         write_cum = 0;
1103         start = 0;
1104
1105         for(i = 0; i < LL_HIST_MAX; i++) {
1106                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1107                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1108         }
1109
1110         for(i = 0; i < LL_HIST_MAX; i++) {
1111                 r = pp_info->pp_r_hist.oh_buckets[i];
1112                 w = pp_info->pp_w_hist.oh_buckets[i];
1113                 read_cum += r;
1114                 write_cum += w;
1115                 end = 1 << (i + LL_HIST_START - units);
1116                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
1117                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
1118                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1119                            r, pct(r, read_tot), pct(read_cum, read_tot),
1120                            w, pct(w, write_tot), pct(write_cum, write_tot));
1121                 start = end;
1122                 if (start == 1<<10) {
1123                         start = 1;
1124                         units += 10;
1125                         unitp++;
1126                 }
1127                 if (read_cum == read_tot && write_cum == write_tot)
1128                         break;
1129         }
1130 }
1131
1132 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1133 {
1134         struct timeval now;
1135         struct ll_sb_info *sbi = seq->private;
1136         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1137         int k;
1138
1139         do_gettimeofday(&now);
1140
1141         if (!sbi->ll_rw_stats_on) {
1142                 seq_printf(seq, "disabled\n"
1143                                 "write anything in this file to activate, "
1144                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1145                 return 0;
1146         }
1147         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1148                    now.tv_sec, now.tv_usec);
1149         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1150         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1151                    "extents", "calls", "%", "cum%",
1152                    "calls", "%", "cum%");
1153         spin_lock(&sbi->ll_pp_extent_lock);
1154         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1155                 if (io_extents->pp_extents[k].pid != 0) {
1156                         seq_printf(seq, "\nPID: %d\n",
1157                                    io_extents->pp_extents[k].pid);
1158                         ll_display_extents_info(io_extents, seq, k);
1159                 }
1160         }
1161         spin_unlock(&sbi->ll_pp_extent_lock);
1162         return 0;
1163 }
1164
1165 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1166                                                 const char *buf, size_t len,
1167                                                 loff_t *off)
1168 {
1169         struct seq_file *seq = file->private_data;
1170         struct ll_sb_info *sbi = seq->private;
1171         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1172         int i;
1173         int value = 1, rc = 0;
1174
1175         rc = lprocfs_write_helper(buf, len, &value);
1176         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1177                        strcmp(buf, "Disabled") == 0))
1178                 value = 0;
1179
1180         if (value == 0)
1181                 sbi->ll_rw_stats_on = 0;
1182         else
1183                 sbi->ll_rw_stats_on = 1;
1184
1185         spin_lock(&sbi->ll_pp_extent_lock);
1186         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1187                 io_extents->pp_extents[i].pid = 0;
1188                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1189                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1190         }
1191         spin_unlock(&sbi->ll_pp_extent_lock);
1192         return len;
1193 }
1194
1195 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1196
1197 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1198 {
1199         struct timeval now;
1200         struct ll_sb_info *sbi = seq->private;
1201         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1202
1203         do_gettimeofday(&now);
1204
1205         if (!sbi->ll_rw_stats_on) {
1206                 seq_printf(seq, "disabled\n"
1207                                 "write anything in this file to activate, "
1208                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1209                 return 0;
1210         }
1211         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1212                    now.tv_sec, now.tv_usec);
1213
1214         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1215         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1216                    "extents", "calls", "%", "cum%",
1217                    "calls", "%", "cum%");
1218         spin_lock(&sbi->ll_lock);
1219         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1220         spin_unlock(&sbi->ll_lock);
1221
1222         return 0;
1223 }
1224
1225 static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf,
1226                                         size_t len, loff_t *off)
1227 {
1228         struct seq_file *seq = file->private_data;
1229         struct ll_sb_info *sbi = seq->private;
1230         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1231         int i;
1232         int value = 1, rc = 0;
1233
1234         rc = lprocfs_write_helper(buf, len, &value);
1235         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1236                        strcmp(buf, "Disabled") == 0))
1237                 value = 0;
1238
1239         if (value == 0)
1240                 sbi->ll_rw_stats_on = 0;
1241         else
1242                 sbi->ll_rw_stats_on = 1;
1243         spin_lock(&sbi->ll_pp_extent_lock);
1244         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1245                 io_extents->pp_extents[i].pid = 0;
1246                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1247                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1248         }
1249         spin_unlock(&sbi->ll_pp_extent_lock);
1250
1251         return len;
1252 }
1253
1254 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1255
1256 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1257                        struct ll_file_data *file, loff_t pos,
1258                        size_t count, int rw)
1259 {
1260         int i, cur = -1;
1261         struct ll_rw_process_info *process;
1262         struct ll_rw_process_info *offset;
1263         int *off_count = &sbi->ll_rw_offset_entry_count;
1264         int *process_count = &sbi->ll_offset_process_count;
1265         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1266
1267         if(!sbi->ll_rw_stats_on)
1268                 return;
1269         process = sbi->ll_rw_process_info;
1270         offset = sbi->ll_rw_offset_info;
1271
1272         spin_lock(&sbi->ll_pp_extent_lock);
1273         /* Extent statistics */
1274         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1275                 if(io_extents->pp_extents[i].pid == pid) {
1276                         cur = i;
1277                         break;
1278                 }
1279         }
1280
1281         if (cur == -1) {
1282                 /* new process */
1283                 sbi->ll_extent_process_count =
1284                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1285                 cur = sbi->ll_extent_process_count;
1286                 io_extents->pp_extents[cur].pid = pid;
1287                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1288                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1289         }
1290
1291         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1292              (i < (LL_HIST_MAX - 1)); i++);
1293         if (rw == 0) {
1294                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1295                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1296         } else {
1297                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1298                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1299         }
1300         spin_unlock(&sbi->ll_pp_extent_lock);
1301
1302         spin_lock(&sbi->ll_process_lock);
1303         /* Offset statistics */
1304         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1305                 if (process[i].rw_pid == pid) {
1306                         if (process[i].rw_last_file != file) {
1307                                 process[i].rw_range_start = pos;
1308                                 process[i].rw_last_file_pos = pos + count;
1309                                 process[i].rw_smallest_extent = count;
1310                                 process[i].rw_largest_extent = count;
1311                                 process[i].rw_offset = 0;
1312                                 process[i].rw_last_file = file;
1313                                 spin_unlock(&sbi->ll_process_lock);
1314                                 return;
1315                         }
1316                         if (process[i].rw_last_file_pos != pos) {
1317                                 *off_count =
1318                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1319                                 offset[*off_count].rw_op = process[i].rw_op;
1320                                 offset[*off_count].rw_pid = pid;
1321                                 offset[*off_count].rw_range_start =
1322                                         process[i].rw_range_start;
1323                                 offset[*off_count].rw_range_end =
1324                                         process[i].rw_last_file_pos;
1325                                 offset[*off_count].rw_smallest_extent =
1326                                         process[i].rw_smallest_extent;
1327                                 offset[*off_count].rw_largest_extent =
1328                                         process[i].rw_largest_extent;
1329                                 offset[*off_count].rw_offset =
1330                                         process[i].rw_offset;
1331                                 process[i].rw_op = rw;
1332                                 process[i].rw_range_start = pos;
1333                                 process[i].rw_smallest_extent = count;
1334                                 process[i].rw_largest_extent = count;
1335                                 process[i].rw_offset = pos -
1336                                         process[i].rw_last_file_pos;
1337                         }
1338                         if(process[i].rw_smallest_extent > count)
1339                                 process[i].rw_smallest_extent = count;
1340                         if(process[i].rw_largest_extent < count)
1341                                 process[i].rw_largest_extent = count;
1342                         process[i].rw_last_file_pos = pos + count;
1343                         spin_unlock(&sbi->ll_process_lock);
1344                         return;
1345                 }
1346         }
1347         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1348         process[*process_count].rw_pid = pid;
1349         process[*process_count].rw_op = rw;
1350         process[*process_count].rw_range_start = pos;
1351         process[*process_count].rw_last_file_pos = pos + count;
1352         process[*process_count].rw_smallest_extent = count;
1353         process[*process_count].rw_largest_extent = count;
1354         process[*process_count].rw_offset = 0;
1355         process[*process_count].rw_last_file = file;
1356         spin_unlock(&sbi->ll_process_lock);
1357 }
1358
1359 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1360 {
1361         struct timeval now;
1362         struct ll_sb_info *sbi = seq->private;
1363         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1364         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1365         int i;
1366
1367         do_gettimeofday(&now);
1368
1369         if (!sbi->ll_rw_stats_on) {
1370                 seq_printf(seq, "disabled\n"
1371                                 "write anything in this file to activate, "
1372                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1373                 return 0;
1374         }
1375         spin_lock(&sbi->ll_process_lock);
1376
1377         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1378                    now.tv_sec, now.tv_usec);
1379         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1380                    "R/W", "PID", "RANGE START", "RANGE END",
1381                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1382
1383         /* We stored the discontiguous offsets here; print them first */
1384         for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1385                 if (offset[i].rw_pid != 0)
1386                         seq_printf(seq,
1387                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1388                                    offset[i].rw_op == READ ? 'R' : 'W',
1389                                    offset[i].rw_pid,
1390                                    offset[i].rw_range_start,
1391                                    offset[i].rw_range_end,
1392                                    (unsigned long)offset[i].rw_smallest_extent,
1393                                    (unsigned long)offset[i].rw_largest_extent,
1394                                    offset[i].rw_offset);
1395         }
1396
1397         /* Then print the current offsets for each process */
1398         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1399                 if (process[i].rw_pid != 0)
1400                         seq_printf(seq,
1401                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1402                                    process[i].rw_op == READ ? 'R' : 'W',
1403                                    process[i].rw_pid,
1404                                    process[i].rw_range_start,
1405                                    process[i].rw_last_file_pos,
1406                                    (unsigned long)process[i].rw_smallest_extent,
1407                                    (unsigned long)process[i].rw_largest_extent,
1408                                    process[i].rw_offset);
1409         }
1410         spin_unlock(&sbi->ll_process_lock);
1411
1412         return 0;
1413 }
1414
1415 static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf,
1416                                        size_t len, loff_t *off)
1417 {
1418         struct seq_file *seq = file->private_data;
1419         struct ll_sb_info *sbi = seq->private;
1420         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1421         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1422         int value = 1, rc = 0;
1423
1424         rc = lprocfs_write_helper(buf, len, &value);
1425
1426         if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1427                            strcmp(buf, "Disabled") == 0))
1428                 value = 0;
1429
1430         if (value == 0)
1431                 sbi->ll_rw_stats_on = 0;
1432         else
1433                 sbi->ll_rw_stats_on = 1;
1434
1435         spin_lock(&sbi->ll_process_lock);
1436         sbi->ll_offset_process_count = 0;
1437         sbi->ll_rw_offset_entry_count = 0;
1438         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1439                LL_PROCESS_HIST_MAX);
1440         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1441                LL_OFFSET_HIST_MAX);
1442         spin_unlock(&sbi->ll_process_lock);
1443
1444         return len;
1445 }
1446
1447 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1448 #endif /* LPROCFS */