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 #include "vvp_internal.h"
  46
  47 struct proc_dir_entry *proc_lustre_fs_root;
  48
  49 #ifdef LPROCFS
  50 /* /proc/lustre/llite mount point registration */
  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 = 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                         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 __user *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         char kernbuf[128];
 416         ENTRY;
 417
 418         if (count >= sizeof(kernbuf))
 419                 RETURN(-EINVAL);
 420
 421         if (copy_from_user(kernbuf, buffer, count))
 422                 RETURN(-EFAULT);
 423         kernbuf[count] = 0;
 424
 425         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 426         buffer += lprocfs_find_named_value(kernbuf, "max_cached_mb:", &count) -
 427                   kernbuf;
 428         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 429         if (rc)
 430                 RETURN(rc);
 431
 432         if (pages_number < 0 || pages_number > totalram_pages) {
 433                 CERROR("%s: can't set max cache more than %lu MB\n",
 434                        ll_get_fsname(sb, NULL, 0),
 435                        totalram_pages >> (20 - PAGE_CACHE_SHIFT));
 436                 RETURN(-ERANGE);
 437         }
 438
 439         if (sbi->ll_dt_exp == NULL) /* being initialized */
 440                 GOTO(out, rc = 0);
 441
 442         spin_lock(&sbi->ll_lock);
 443         diff = pages_number - cache->ccc_lru_max;
 444         spin_unlock(&sbi->ll_lock);
 445
 446         /* easy - add more LRU slots. */
 447         if (diff >= 0) {
 448                 atomic_add(diff, &cache->ccc_lru_left);
 449                 GOTO(out, rc = 0);
 450         }
 451
 452         env = cl_env_get(&refcheck);
 453         if (IS_ERR(env))
 454                 RETURN(rc);
 455
 456         diff = -diff;
 457         while (diff > 0) {
 458                 int tmp;
 459
 460                 /* reduce LRU budget from free slots. */
 461                 do {
 462                         int ov, nv;
 463
 464                         ov = atomic_read(&cache->ccc_lru_left);
 465                         if (ov == 0)
 466                                 break;
 467
 468                         nv = ov > diff ? ov - diff : 0;
 469                         rc = atomic_cmpxchg(&cache->ccc_lru_left, ov, nv);
 470                         if (likely(ov == rc)) {
 471                                 diff -= ov - nv;
 472                                 nrpages += ov - nv;
 473                                 break;
 474                         }
 475                 } while (1);
 476
 477                 if (diff <= 0)
 478                         break;
 479
 480                 /* difficult - have to ask OSCs to drop LRU slots. */
 481                 tmp = diff << 1;
 482                 rc = obd_set_info_async(env, sbi->ll_dt_exp,
 483                                 sizeof(KEY_CACHE_LRU_SHRINK),
 484                                 KEY_CACHE_LRU_SHRINK,
 485                                 sizeof(tmp), &tmp, NULL);
 486                 if (rc < 0)
 487                         break;
 488         }
 489         cl_env_put(env, &refcheck);
 490
 491 out:
 492         if (rc >= 0) {
 493                 spin_lock(&sbi->ll_lock);
 494                 cache->ccc_lru_max = pages_number;
 495                 spin_unlock(&sbi->ll_lock);
 496                 rc = count;
 497         } else {
 498                 atomic_add(nrpages, &cache->ccc_lru_left);
 499         }
 500         return rc;
 501 }
 502 LPROC_SEQ_FOPS(ll_max_cached_mb);
 503
 504 static int ll_checksum_seq_show(struct seq_file *m, void *v)
 505 {
 506         struct super_block *sb = m->private;
 507         struct ll_sb_info *sbi = ll_s2sbi(sb);
 508
 509         return seq_printf(m, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 510 }
 511
 512 static ssize_t ll_checksum_seq_write(struct file *file, const char *buffer,
 513                                      size_t count, loff_t *off)
 514 {
 515         struct seq_file *m = file->private_data;
 516         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 517         int val, rc;
 518
 519         if (!sbi->ll_dt_exp)
 520                 /* Not set up yet */
 521                 return -EAGAIN;
 522
 523         rc = lprocfs_write_helper(buffer, count, &val);
 524         if (rc)
 525                 return rc;
 526         if (val)
 527                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 528         else
 529                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 530
 531         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 532                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 533         if (rc)
 534                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 535
 536         return count;
 537 }
 538 LPROC_SEQ_FOPS(ll_checksum);
 539
 540 static int ll_max_rw_chunk_seq_show(struct seq_file *m, void *v)
 541 {
 542         struct super_block *sb = m->private;
 543
 544         return seq_printf(m, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk);
 545 }
 546
 547 static ssize_t ll_max_rw_chunk_seq_write(struct file *file, const char *buffer,
 548                                          size_t count, loff_t *off)
 549 {
 550         struct seq_file *m = file->private_data;
 551         struct super_block *sb = m->private;
 552         int rc, val;
 553
 554         rc = lprocfs_write_helper(buffer, count, &val);
 555         if (rc)
 556                 return rc;
 557         ll_s2sbi(sb)->ll_max_rw_chunk = val;
 558         return count;
 559 }
 560 LPROC_SEQ_FOPS(ll_max_rw_chunk);
 561
 562 static int ll_rd_track_id(struct seq_file *m, enum stats_track_type type)
 563 {
 564         struct super_block *sb = m->private;
 565
 566         if (ll_s2sbi(sb)->ll_stats_track_type == type) {
 567                 return seq_printf(m, "%d\n",
 568                                   ll_s2sbi(sb)->ll_stats_track_id);
 569         } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
 570                 return seq_printf(m, "0 (all)\n");
 571         } else {
 572                 return seq_printf(m, "untracked\n");
 573         }
 574 }
 575
 576 static int ll_wr_track_id(const char *buffer, unsigned long count, void *data,
 577                           enum stats_track_type type)
 578 {
 579         struct super_block *sb = data;
 580         int rc, pid;
 581
 582         rc = lprocfs_write_helper(buffer, count, &pid);
 583         if (rc)
 584                 return rc;
 585         ll_s2sbi(sb)->ll_stats_track_id = pid;
 586         if (pid == 0)
 587                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 588         else
 589                 ll_s2sbi(sb)->ll_stats_track_type = type;
 590         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 591         return count;
 592 }
 593
 594 static int ll_track_pid_seq_show(struct seq_file *m, void *v)
 595 {
 596         return ll_rd_track_id(m, STATS_TRACK_PID);
 597 }
 598
 599 static ssize_t ll_track_pid_seq_write(struct file *file, const char *buffer,
 600                                       size_t count, loff_t *off)
 601 {
 602         struct seq_file *seq = file->private_data;
 603         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PID);
 604 }
 605 LPROC_SEQ_FOPS(ll_track_pid);
 606
 607 static int ll_track_ppid_seq_show(struct seq_file *m, void *v)
 608 {
 609         return ll_rd_track_id(m, STATS_TRACK_PPID);
 610 }
 611
 612 static ssize_t ll_track_ppid_seq_write(struct file *file, const char *buffer,
 613                                        size_t count, loff_t *off)
 614 {
 615         struct seq_file *seq = file->private_data;
 616         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PPID);
 617 }
 618 LPROC_SEQ_FOPS(ll_track_ppid);
 619
 620 static int ll_track_gid_seq_show(struct seq_file *m, void *v)
 621 {
 622         return ll_rd_track_id(m, STATS_TRACK_GID);
 623 }
 624
 625 static ssize_t ll_track_gid_seq_write(struct file *file, const char *buffer,
 626                                       size_t count, loff_t *off)
 627 {
 628         struct seq_file *seq = file->private_data;
 629         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_GID);
 630 }
 631 LPROC_SEQ_FOPS(ll_track_gid);
 632
 633 static int ll_statahead_max_seq_show(struct seq_file *m, void *v)
 634 {
 635         struct super_block *sb = m->private;
 636         struct ll_sb_info *sbi = ll_s2sbi(sb);
 637
 638         return seq_printf(m, "%u\n", sbi->ll_sa_max);
 639 }
 640
 641 static ssize_t ll_statahead_max_seq_write(struct file *file, const char *buffer,
 642                                           size_t count, loff_t *off)
 643 {
 644         struct seq_file *m = file->private_data;
 645         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 646         int val, rc;
 647
 648         rc = lprocfs_write_helper(buffer, count, &val);
 649         if (rc)
 650                 return rc;
 651
 652         if (val >= 0 && val <= LL_SA_RPC_MAX)
 653                 sbi->ll_sa_max = val;
 654         else
 655                 CERROR("Bad statahead_max value %d. Valid values are in the "
 656                        "range [0, %d]\n", val, LL_SA_RPC_MAX);
 657
 658         return count;
 659 }
 660 LPROC_SEQ_FOPS(ll_statahead_max);
 661
 662 static int ll_statahead_agl_seq_show(struct seq_file *m, void *v)
 663 {
 664         struct super_block *sb = m->private;
 665         struct ll_sb_info *sbi = ll_s2sbi(sb);
 666
 667         return seq_printf(m, "%u\n",
 668                           sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
 669 }
 670
 671 static ssize_t ll_statahead_agl_seq_write(struct file *file, const char *buffer,
 672                                           size_t count, loff_t *off)
 673 {
 674         struct seq_file *m = file->private_data;
 675         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 676         int val, rc;
 677
 678         rc = lprocfs_write_helper(buffer, count, &val);
 679         if (rc)
 680                 return rc;
 681
 682         if (val)
 683                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 684         else
 685                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
 686
 687         return count;
 688 }
 689 LPROC_SEQ_FOPS(ll_statahead_agl);
 690
 691 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
 692 {
 693         struct super_block *sb = m->private;
 694         struct ll_sb_info *sbi = ll_s2sbi(sb);
 695
 696         return seq_printf(m,
 697                         "statahead total: %u\n"
 698                         "statahead wrong: %u\n"
 699                         "agl total: %u\n",
 700                         atomic_read(&sbi->ll_sa_total),
 701                         atomic_read(&sbi->ll_sa_wrong),
 702                         atomic_read(&sbi->ll_agl_total));
 703 }
 704 LPROC_SEQ_FOPS_RO(ll_statahead_stats);
 705
 706 static int ll_lazystatfs_seq_show(struct seq_file *m, void *v)
 707 {
 708         struct super_block *sb = m->private;
 709         struct ll_sb_info *sbi = ll_s2sbi(sb);
 710
 711         return seq_printf(m, "%u\n",
 712                           (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 713 }
 714
 715 static ssize_t ll_lazystatfs_seq_write(struct file *file, const char *buffer,
 716                                         size_t count, loff_t *off)
 717 {
 718         struct seq_file *m = file->private_data;
 719         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 720         int val, rc;
 721
 722         rc = lprocfs_write_helper(buffer, count, &val);
 723         if (rc)
 724                 return rc;
 725
 726         if (val)
 727                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 728         else
 729                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 730
 731         return count;
 732 }
 733 LPROC_SEQ_FOPS(ll_lazystatfs);
 734
 735 static int ll_max_easize_seq_show(struct seq_file *m, void *v)
 736 {
 737         struct super_block *sb = m->private;
 738         struct ll_sb_info *sbi = ll_s2sbi(sb);
 739         unsigned int ealen;
 740         int rc;
 741
 742         rc = ll_get_max_mdsize(sbi, &ealen);
 743         if (rc)
 744                 return rc;
 745
 746         return seq_printf(m, "%u\n", ealen);
 747 }
 748 LPROC_SEQ_FOPS_RO(ll_max_easize);
 749
 750 static int ll_defult_easize_seq_show(struct seq_file *m, void *v)
 751 {
 752         struct super_block *sb = m->private;
 753         struct ll_sb_info *sbi = ll_s2sbi(sb);
 754         unsigned int ealen;
 755         int rc;
 756
 757         rc = ll_get_default_mdsize(sbi, &ealen);
 758         if (rc)
 759                 return rc;
 760
 761         return seq_printf(m, "%u\n", ealen);
 762 }
 763 LPROC_SEQ_FOPS_RO(ll_defult_easize);
 764
 765 static int ll_max_cookiesize_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         unsigned int cookielen;
 770         int rc;
 771
 772         rc = ll_get_max_cookiesize(sbi, &cookielen);
 773         if (rc)
 774                 return rc;
 775
 776         return seq_printf(m, "%u\n", cookielen);
 777 }
 778 LPROC_SEQ_FOPS_RO(ll_max_cookiesize);
 779
 780 static int ll_defult_cookiesize_seq_show(struct seq_file *m, void *v)
 781 {
 782         struct super_block *sb = m->private;
 783         struct ll_sb_info *sbi = ll_s2sbi(sb);
 784         unsigned int cookielen;
 785         int rc;
 786
 787         rc = ll_get_default_cookiesize(sbi, &cookielen);
 788         if (rc)
 789                 return rc;
 790
 791         return seq_printf(m, "%u\n", cookielen);
 792 }
 793 LPROC_SEQ_FOPS_RO(ll_defult_cookiesize);
 794
 795 static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
 796 {
 797         const char *str[] = LL_SBI_FLAGS;
 798         struct super_block *sb = m->private;
 799         int flags = ll_s2sbi(sb)->ll_flags;
 800         int i = 0;
 801
 802         while (flags != 0) {
 803                 if (ARRAY_SIZE(str) <= i) {
 804                         CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
 805                                 "flags please.\n", ll_get_fsname(sb, NULL, 0));
 806                         return -EINVAL;
 807                 }
 808
 809                 if (flags & 0x1)
 810                         seq_printf(m, "%s ", str[i]);
 811                 flags >>= 1;
 812                 ++i;
 813         }
 814         seq_printf(m, "\b\n");
 815         return 0;
 816 }
 817 LPROC_SEQ_FOPS_RO(ll_sbi_flags);
 818
 819 static int ll_unstable_stats_seq_show(struct seq_file *m, void *v)
 820 {
 821         struct super_block      *sb    = m->private;
 822         struct ll_sb_info       *sbi   = ll_s2sbi(sb);
 823         struct cl_client_cache  *cache = &sbi->ll_cache;
 824         int pages, mb;
 825
 826         pages = atomic_read(&cache->ccc_unstable_nr);
 827         mb    = (pages * PAGE_CACHE_SIZE) >> 20;
 828
 829         return seq_printf(m, "unstable_pages: %8d\n"
 830                                 "unstable_mb:    %8d\n", pages, mb);
 831 }
 832 LPROC_SEQ_FOPS_RO(ll_unstable_stats);
 833
 834 struct lprocfs_seq_vars lprocfs_llite_obd_vars[] = {
 835         { .name =       "uuid",
 836           .fops =       &ll_sb_uuid_fops                        },
 837         { .name =       "fstype",
 838           .fops =       &ll_fstype_fops                         },
 839         { .name =       "site",
 840           .fops =       &ll_site_stats_fops                     },
 841         { .name =       "blocksize",
 842           .fops =       &ll_blksize_fops                        },
 843         { .name =       "kbytestotal",
 844           .fops =       &ll_kbytestotal_fops                    },
 845         { .name =       "kbytesfree",
 846           .fops =       &ll_kbytesfree_fops                     },
 847         { .name =       "kbytesavail",
 848           .fops =       &ll_kbytesavail_fops                    },
 849         { .name =       "filestotal",
 850           .fops =       &ll_filestotal_fops                     },
 851         { .name =       "filesfree",
 852           .fops =       &ll_filesfree_fops                      },
 853         { .name =       "client_type",
 854           .fops =       &ll_client_type_fops                    },
 855         { .name =       "max_read_ahead_mb",
 856           .fops =       &ll_max_readahead_mb_fops               },
 857         { .name =       "max_read_ahead_per_file_mb",
 858           .fops =       &ll_max_readahead_per_file_mb_fops      },
 859         { .name =       "max_read_ahead_whole_mb",
 860           .fops =       &ll_max_read_ahead_whole_mb_fops        },
 861         { .name =       "max_cached_mb",
 862           .fops =       &ll_max_cached_mb_fops                  },
 863         { .name =       "checksum_pages",
 864           .fops =       &ll_checksum_fops                       },
 865         { .name =       "max_rw_chunk",
 866           .fops =       &ll_max_rw_chunk_fops                   },
 867         { .name =       "stats_track_pid",
 868           .fops =       &ll_track_pid_fops                      },
 869         { .name =       "stats_track_ppid",
 870           .fops =       &ll_track_ppid_fops                     },
 871         { .name =       "stats_track_gid",
 872           .fops =       &ll_track_gid_fops                      },
 873         { .name =       "statahead_max",
 874           .fops =       &ll_statahead_max_fops                  },
 875         { .name =       "statahead_agl",
 876           .fops =       &ll_statahead_agl_fops                  },
 877         { .name =       "statahead_stats",
 878           .fops =       &ll_statahead_stats_fops                },
 879         { .name =       "lazystatfs",
 880           .fops =       &ll_lazystatfs_fops                     },
 881         { .name =       "max_easize",
 882           .fops =       &ll_max_easize_fops                     },
 883         { .name =       "default_easize",
 884           .fops =       &ll_defult_easize_fops                  },
 885         { .name =       "max_cookiesize",
 886           .fops =       &ll_max_cookiesize_fops                 },
 887         { .name =       "default_cookiesize",
 888           .fops =       &ll_defult_cookiesize_fops              },
 889         { .name =       "sbi_flags",
 890           .fops =       &ll_sbi_flags_fops                      },
 891         { .name =       "xattr_cache",
 892           .fops =       &ll_xattr_cache_fops                    },
 893         { .name =       "unstable_stats",
 894           .fops =       &ll_unstable_stats_fops                 },
 895         { 0 }
 896 };
 897
 898 #define MAX_STRING_SIZE 128
 899
 900 static const struct llite_file_opcode {
 901         __u32       opcode;
 902         __u32       type;
 903         const char *opname;
 904 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
 905         /* file operation */
 906         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
 907         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
 908         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 909                                    "read_bytes" },
 910         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 911                                    "write_bytes" },
 912         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 913                                    "brw_read" },
 914         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
 915                                    "brw_write" },
 916         { LPROC_LL_OSC_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 917                                    "osc_read" },
 918         { LPROC_LL_OSC_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
 919                                    "osc_write" },
 920         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
 921         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
 922         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
 923         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
 924         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
 925         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
 926         { LPROC_LL_READDIR,        LPROCFS_TYPE_REGS, "readdir" },
 927         /* inode operation */
 928         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
 929         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "truncate" },
 930         { LPROC_LL_FLOCK,          LPROCFS_TYPE_REGS, "flock" },
 931         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
 932         /* dir inode operation */
 933         { LPROC_LL_CREATE,         LPROCFS_TYPE_REGS, "create" },
 934         { LPROC_LL_LINK,           LPROCFS_TYPE_REGS, "link" },
 935         { LPROC_LL_UNLINK,         LPROCFS_TYPE_REGS, "unlink" },
 936         { LPROC_LL_SYMLINK,        LPROCFS_TYPE_REGS, "symlink" },
 937         { LPROC_LL_MKDIR,          LPROCFS_TYPE_REGS, "mkdir" },
 938         { LPROC_LL_RMDIR,          LPROCFS_TYPE_REGS, "rmdir" },
 939         { LPROC_LL_MKNOD,          LPROCFS_TYPE_REGS, "mknod" },
 940         { LPROC_LL_RENAME,         LPROCFS_TYPE_REGS, "rename" },
 941         /* special inode operation */
 942         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
 943         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
 944         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
 945         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
 946         { LPROC_LL_GETXATTR_HITS,  LPROCFS_TYPE_REGS, "getxattr_hits" },
 947         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
 948         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
 949         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
 950 };
 951
 952 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
 953 {
 954         if (!sbi->ll_stats)
 955                 return;
 956         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 957                 lprocfs_counter_add(sbi->ll_stats, op, count);
 958         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
 959                  sbi->ll_stats_track_id == current->pid)
 960                 lprocfs_counter_add(sbi->ll_stats, op, count);
 961         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
 962                  sbi->ll_stats_track_id == current->parent->pid)
 963                 lprocfs_counter_add(sbi->ll_stats, op, count);
 964         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
 965                  sbi->ll_stats_track_id ==
 966                         from_kgid(&init_user_ns, current_gid()))
 967                 lprocfs_counter_add(sbi->ll_stats, op, count);
 968 }
 969 EXPORT_SYMBOL(ll_stats_ops_tally);
 970
 971 static const char *ra_stat_string[] = {
 972         [RA_STAT_HIT] = "hits",
 973         [RA_STAT_MISS] = "misses",
 974         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
 975         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
 976         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
 977         [RA_STAT_FAILED_MATCH] = "failed lock match",
 978         [RA_STAT_DISCARDED] = "read but discarded",
 979         [RA_STAT_ZERO_LEN] = "zero length file",
 980         [RA_STAT_ZERO_WINDOW] = "zero size window",
 981         [RA_STAT_EOF] = "read-ahead to EOF",
 982         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
 983         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
 984         [RA_STAT_FAILED_REACH_END] = "failed to reach end"
 985 };
 986
 987 LPROC_SEQ_FOPS_RO_TYPE(llite, name);
 988 LPROC_SEQ_FOPS_RO_TYPE(llite, uuid);
 989
 990 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
 991                                 struct super_block *sb, char *osc, char *mdc)
 992 {
 993         struct lprocfs_seq_vars lvars[2];
 994         struct lustre_sb_info *lsi = s2lsi(sb);
 995         struct ll_sb_info *sbi = ll_s2sbi(sb);
 996         struct obd_device *obd;
 997         struct proc_dir_entry *dir;
 998         char name[MAX_STRING_SIZE + 1], *ptr;
 999         int err, id, len, rc;
1000         ENTRY;
1001
1002         memset(lvars, 0, sizeof(lvars));
1003
1004         name[MAX_STRING_SIZE] = '\0';
1005         lvars[0].name = name;
1006
1007         LASSERT(sbi != NULL);
1008         LASSERT(mdc != NULL);
1009         LASSERT(osc != NULL);
1010
1011         /* Get fsname */
1012         len = strlen(lsi->lsi_lmd->lmd_profile);
1013         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
1014         if (ptr && (strcmp(ptr, "-client") == 0))
1015                 len -= 7;
1016
1017         /* Mount info */
1018         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
1019                  lsi->lsi_lmd->lmd_profile, sb);
1020
1021         sbi->ll_proc_root = lprocfs_seq_register(name, parent, NULL, NULL);
1022         if (IS_ERR(sbi->ll_proc_root)) {
1023                 err = PTR_ERR(sbi->ll_proc_root);
1024                 sbi->ll_proc_root = NULL;
1025                 RETURN(err);
1026         }
1027
1028         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
1029                                 &vvp_dump_pgcache_file_ops, sbi);
1030         if (rc)
1031                 CWARN("Error adding the dump_page_cache file\n");
1032
1033         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
1034                                 &ll_rw_extents_stats_fops, sbi);
1035         if (rc)
1036                 CWARN("Error adding the extent_stats file\n");
1037
1038         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
1039                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
1040         if (rc)
1041                 CWARN("Error adding the extents_stats_per_process file\n");
1042
1043         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
1044                                 &ll_rw_offset_stats_fops, sbi);
1045         if (rc)
1046                 CWARN("Error adding the offset_stats file\n");
1047
1048         /* File operations stats */
1049         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
1050                                             LPROCFS_STATS_FLAG_NONE);
1051         if (sbi->ll_stats == NULL)
1052                 GOTO(out, err = -ENOMEM);
1053         /* do counter init */
1054         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
1055                 __u32 type = llite_opcode_table[id].type;
1056                 void *ptr = NULL;
1057                 if (type & LPROCFS_TYPE_REGS)
1058                         ptr = "regs";
1059                 else if (type & LPROCFS_TYPE_BYTES)
1060                         ptr = "bytes";
1061                 else if (type & LPROCFS_TYPE_PAGES)
1062                         ptr = "pages";
1063                 lprocfs_counter_init(sbi->ll_stats,
1064                                      llite_opcode_table[id].opcode,
1065                                      (type & LPROCFS_CNTR_AVGMINMAX),
1066                                      llite_opcode_table[id].opname, ptr);
1067         }
1068         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
1069         if (err)
1070                 GOTO(out, err);
1071
1072         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1073                                                LPROCFS_STATS_FLAG_NONE);
1074         if (sbi->ll_ra_stats == NULL)
1075                 GOTO(out, err = -ENOMEM);
1076
1077         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1078                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
1079                                      ra_stat_string[id], "pages");
1080         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
1081                                      sbi->ll_ra_stats);
1082         if (err)
1083                 GOTO(out, err);
1084
1085
1086         err = lprocfs_seq_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
1087         if (err)
1088                 GOTO(out, err);
1089
1090         /* MDC info */
1091         obd = class_name2obd(mdc);
1092
1093         LASSERT(obd != NULL);
1094         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1095         LASSERT(obd->obd_type->typ_name != NULL);
1096
1097         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1098         if (dir == NULL)
1099                 GOTO(out, err = -ENOMEM);
1100
1101         snprintf(name, MAX_STRING_SIZE, "common_name");
1102         lvars[0].fops = &llite_name_fops;
1103         err = lprocfs_seq_add_vars(dir, lvars, obd);
1104         if (err)
1105                 GOTO(out, err);
1106
1107         snprintf(name, MAX_STRING_SIZE, "uuid");
1108         lvars[0].fops = &llite_uuid_fops;
1109         err = lprocfs_seq_add_vars(dir, lvars, obd);
1110         if (err)
1111                 GOTO(out, err);
1112
1113         /* OSC */
1114         obd = class_name2obd(osc);
1115
1116         LASSERT(obd != NULL);
1117         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1118         LASSERT(obd->obd_type->typ_name != NULL);
1119
1120         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1121         if (dir == NULL)
1122                 GOTO(out, err = -ENOMEM);
1123
1124         snprintf(name, MAX_STRING_SIZE, "common_name");
1125         lvars[0].fops = &llite_name_fops;
1126         err = lprocfs_seq_add_vars(dir, lvars, obd);
1127         if (err)
1128                 GOTO(out, err);
1129
1130         snprintf(name, MAX_STRING_SIZE, "uuid");
1131         lvars[0].fops = &llite_uuid_fops;
1132         err = lprocfs_seq_add_vars(dir, lvars, obd);
1133 out:
1134         if (err) {
1135                 lprocfs_remove(&sbi->ll_proc_root);
1136                 lprocfs_free_stats(&sbi->ll_ra_stats);
1137                 lprocfs_free_stats(&sbi->ll_stats);
1138         }
1139         RETURN(err);
1140 }
1141
1142 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
1143 {
1144         if (sbi->ll_proc_root) {
1145                 lprocfs_remove(&sbi->ll_proc_root);
1146                 lprocfs_free_stats(&sbi->ll_ra_stats);
1147                 lprocfs_free_stats(&sbi->ll_stats);
1148         }
1149 }
1150 #undef MAX_STRING_SIZE
1151
1152 #define pct(a,b) (b ? a * 100 / b : 0)
1153
1154 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1155                                    struct seq_file *seq, int which)
1156 {
1157         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1158         unsigned long start, end, r, w;
1159         char *unitp = "KMGTPEZY";
1160         int i, units = 10;
1161         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1162
1163         read_cum = 0;
1164         write_cum = 0;
1165         start = 0;
1166
1167         for(i = 0; i < LL_HIST_MAX; i++) {
1168                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1169                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1170         }
1171
1172         for(i = 0; i < LL_HIST_MAX; i++) {
1173                 r = pp_info->pp_r_hist.oh_buckets[i];
1174                 w = pp_info->pp_w_hist.oh_buckets[i];
1175                 read_cum += r;
1176                 write_cum += w;
1177                 end = 1 << (i + LL_HIST_START - units);
1178                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
1179                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
1180                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1181                            r, pct(r, read_tot), pct(read_cum, read_tot),
1182                            w, pct(w, write_tot), pct(write_cum, write_tot));
1183                 start = end;
1184                 if (start == 1<<10) {
1185                         start = 1;
1186                         units += 10;
1187                         unitp++;
1188                 }
1189                 if (read_cum == read_tot && write_cum == write_tot)
1190                         break;
1191         }
1192 }
1193
1194 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1195 {
1196         struct timeval now;
1197         struct ll_sb_info *sbi = seq->private;
1198         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1199         int k;
1200
1201         do_gettimeofday(&now);
1202
1203         if (!sbi->ll_rw_stats_on) {
1204                 seq_printf(seq, "disabled\n"
1205                                 "write anything in this file to activate, "
1206                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1207                 return 0;
1208         }
1209         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1210                    now.tv_sec, now.tv_usec);
1211         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1212         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1213                    "extents", "calls", "%", "cum%",
1214                    "calls", "%", "cum%");
1215         spin_lock(&sbi->ll_pp_extent_lock);
1216         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1217                 if (io_extents->pp_extents[k].pid != 0) {
1218                         seq_printf(seq, "\nPID: %d\n",
1219                                    io_extents->pp_extents[k].pid);
1220                         ll_display_extents_info(io_extents, seq, k);
1221                 }
1222         }
1223         spin_unlock(&sbi->ll_pp_extent_lock);
1224         return 0;
1225 }
1226
1227 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1228                                                 const char __user *buf,
1229                                                 size_t len,
1230                                                 loff_t *off)
1231 {
1232         struct seq_file *seq = file->private_data;
1233         struct ll_sb_info *sbi = seq->private;
1234         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1235         int i;
1236         int value = 1, rc = 0;
1237
1238         if (len == 0)
1239                 return -EINVAL;
1240
1241         rc = lprocfs_write_helper(buf, len, &value);
1242         if (rc < 0 && len < 16) {
1243                 char kernbuf[16];
1244
1245                 if (copy_from_user(kernbuf, buf, len))
1246                         return -EFAULT;
1247                 kernbuf[len] = 0;
1248
1249                 if (kernbuf[len - 1] == '\n')
1250                         kernbuf[len - 1] = 0;
1251
1252                 if (strcmp(kernbuf, "disabled") == 0 ||
1253                     strcmp(kernbuf, "Disabled") == 0)
1254                         value = 0;
1255         }
1256
1257         if (value == 0)
1258                 sbi->ll_rw_stats_on = 0;
1259         else
1260                 sbi->ll_rw_stats_on = 1;
1261
1262         spin_lock(&sbi->ll_pp_extent_lock);
1263         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1264                 io_extents->pp_extents[i].pid = 0;
1265                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1266                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1267         }
1268         spin_unlock(&sbi->ll_pp_extent_lock);
1269         return len;
1270 }
1271
1272 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1273
1274 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1275 {
1276         struct timeval now;
1277         struct ll_sb_info *sbi = seq->private;
1278         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1279
1280         do_gettimeofday(&now);
1281
1282         if (!sbi->ll_rw_stats_on) {
1283                 seq_printf(seq, "disabled\n"
1284                                 "write anything in this file to activate, "
1285                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1286                 return 0;
1287         }
1288         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1289                    now.tv_sec, now.tv_usec);
1290
1291         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1292         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1293                    "extents", "calls", "%", "cum%",
1294                    "calls", "%", "cum%");
1295         spin_lock(&sbi->ll_lock);
1296         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1297         spin_unlock(&sbi->ll_lock);
1298
1299         return 0;
1300 }
1301
1302 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
1303                                              const char __user *buf,
1304                                              size_t len, loff_t *off)
1305 {
1306         struct seq_file *seq = file->private_data;
1307         struct ll_sb_info *sbi = seq->private;
1308         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1309         int i;
1310         int value = 1, rc = 0;
1311
1312         if (len == 0)
1313                 return -EINVAL;
1314
1315         rc = lprocfs_write_helper(buf, len, &value);
1316         if (rc < 0 && len < 16) {
1317                 char kernbuf[16];
1318
1319                 if (copy_from_user(kernbuf, buf, len))
1320                         return -EFAULT;
1321                 kernbuf[len] = 0;
1322
1323                 if (kernbuf[len - 1] == '\n')
1324                         kernbuf[len - 1] = 0;
1325
1326                 if (strcmp(kernbuf, "disabled") == 0 ||
1327                     strcmp(kernbuf, "Disabled") == 0)
1328                         value = 0;
1329         }
1330
1331         if (value == 0)
1332                 sbi->ll_rw_stats_on = 0;
1333         else
1334                 sbi->ll_rw_stats_on = 1;
1335
1336         spin_lock(&sbi->ll_pp_extent_lock);
1337         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1338                 io_extents->pp_extents[i].pid = 0;
1339                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1340                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1341         }
1342         spin_unlock(&sbi->ll_pp_extent_lock);
1343
1344         return len;
1345 }
1346 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1347
1348 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1349                        struct ll_file_data *file, loff_t pos,
1350                        size_t count, int rw)
1351 {
1352         int i, cur = -1;
1353         struct ll_rw_process_info *process;
1354         struct ll_rw_process_info *offset;
1355         int *off_count = &sbi->ll_rw_offset_entry_count;
1356         int *process_count = &sbi->ll_offset_process_count;
1357         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1358
1359         if(!sbi->ll_rw_stats_on)
1360                 return;
1361         process = sbi->ll_rw_process_info;
1362         offset = sbi->ll_rw_offset_info;
1363
1364         spin_lock(&sbi->ll_pp_extent_lock);
1365         /* Extent statistics */
1366         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1367                 if(io_extents->pp_extents[i].pid == pid) {
1368                         cur = i;
1369                         break;
1370                 }
1371         }
1372
1373         if (cur == -1) {
1374                 /* new process */
1375                 sbi->ll_extent_process_count =
1376                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1377                 cur = sbi->ll_extent_process_count;
1378                 io_extents->pp_extents[cur].pid = pid;
1379                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1380                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1381         }
1382
1383         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1384              (i < (LL_HIST_MAX - 1)); i++);
1385         if (rw == 0) {
1386                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1387                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1388         } else {
1389                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1390                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1391         }
1392         spin_unlock(&sbi->ll_pp_extent_lock);
1393
1394         spin_lock(&sbi->ll_process_lock);
1395         /* Offset statistics */
1396         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1397                 if (process[i].rw_pid == pid) {
1398                         if (process[i].rw_last_file != file) {
1399                                 process[i].rw_range_start = pos;
1400                                 process[i].rw_last_file_pos = pos + count;
1401                                 process[i].rw_smallest_extent = count;
1402                                 process[i].rw_largest_extent = count;
1403                                 process[i].rw_offset = 0;
1404                                 process[i].rw_last_file = file;
1405                                 spin_unlock(&sbi->ll_process_lock);
1406                                 return;
1407                         }
1408                         if (process[i].rw_last_file_pos != pos) {
1409                                 *off_count =
1410                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1411                                 offset[*off_count].rw_op = process[i].rw_op;
1412                                 offset[*off_count].rw_pid = pid;
1413                                 offset[*off_count].rw_range_start =
1414                                         process[i].rw_range_start;
1415                                 offset[*off_count].rw_range_end =
1416                                         process[i].rw_last_file_pos;
1417                                 offset[*off_count].rw_smallest_extent =
1418                                         process[i].rw_smallest_extent;
1419                                 offset[*off_count].rw_largest_extent =
1420                                         process[i].rw_largest_extent;
1421                                 offset[*off_count].rw_offset =
1422                                         process[i].rw_offset;
1423                                 process[i].rw_op = rw;
1424                                 process[i].rw_range_start = pos;
1425                                 process[i].rw_smallest_extent = count;
1426                                 process[i].rw_largest_extent = count;
1427                                 process[i].rw_offset = pos -
1428                                         process[i].rw_last_file_pos;
1429                         }
1430                         if(process[i].rw_smallest_extent > count)
1431                                 process[i].rw_smallest_extent = count;
1432                         if(process[i].rw_largest_extent < count)
1433                                 process[i].rw_largest_extent = count;
1434                         process[i].rw_last_file_pos = pos + count;
1435                         spin_unlock(&sbi->ll_process_lock);
1436                         return;
1437                 }
1438         }
1439         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1440         process[*process_count].rw_pid = pid;
1441         process[*process_count].rw_op = rw;
1442         process[*process_count].rw_range_start = pos;
1443         process[*process_count].rw_last_file_pos = pos + count;
1444         process[*process_count].rw_smallest_extent = count;
1445         process[*process_count].rw_largest_extent = count;
1446         process[*process_count].rw_offset = 0;
1447         process[*process_count].rw_last_file = file;
1448         spin_unlock(&sbi->ll_process_lock);
1449 }
1450
1451 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1452 {
1453         struct timeval now;
1454         struct ll_sb_info *sbi = seq->private;
1455         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1456         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1457         int i;
1458
1459         do_gettimeofday(&now);
1460
1461         if (!sbi->ll_rw_stats_on) {
1462                 seq_printf(seq, "disabled\n"
1463                                 "write anything in this file to activate, "
1464                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1465                 return 0;
1466         }
1467         spin_lock(&sbi->ll_process_lock);
1468
1469         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1470                    now.tv_sec, now.tv_usec);
1471         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1472                    "R/W", "PID", "RANGE START", "RANGE END",
1473                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1474
1475         /* We stored the discontiguous offsets here; print them first */
1476         for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1477                 if (offset[i].rw_pid != 0)
1478                         seq_printf(seq,
1479                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1480                                    offset[i].rw_op == READ ? 'R' : 'W',
1481                                    offset[i].rw_pid,
1482                                    offset[i].rw_range_start,
1483                                    offset[i].rw_range_end,
1484                                    (unsigned long)offset[i].rw_smallest_extent,
1485                                    (unsigned long)offset[i].rw_largest_extent,
1486                                    offset[i].rw_offset);
1487         }
1488
1489         /* Then print the current offsets for each process */
1490         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1491                 if (process[i].rw_pid != 0)
1492                         seq_printf(seq,
1493                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1494                                    process[i].rw_op == READ ? 'R' : 'W',
1495                                    process[i].rw_pid,
1496                                    process[i].rw_range_start,
1497                                    process[i].rw_last_file_pos,
1498                                    (unsigned long)process[i].rw_smallest_extent,
1499                                    (unsigned long)process[i].rw_largest_extent,
1500                                    process[i].rw_offset);
1501         }
1502         spin_unlock(&sbi->ll_process_lock);
1503
1504         return 0;
1505 }
1506
1507 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
1508                                             const char __user *buf,
1509                                             size_t len, loff_t *off)
1510 {
1511         struct seq_file *seq = file->private_data;
1512         struct ll_sb_info *sbi = seq->private;
1513         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1514         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1515         int value = 1, rc = 0;
1516
1517         if (len == 0)
1518                 return -EINVAL;
1519
1520         rc = lprocfs_write_helper(buf, len, &value);
1521
1522         if (rc < 0 && len < 16) {
1523                 char kernbuf[16];
1524
1525                 if (copy_from_user(kernbuf, buf, len))
1526                         return -EFAULT;
1527                 kernbuf[len] = 0;
1528
1529                 if (kernbuf[len - 1] == '\n')
1530                         kernbuf[len - 1] = 0;
1531
1532                 if (strcmp(kernbuf, "disabled") == 0 ||
1533                     strcmp(kernbuf, "Disabled") == 0)
1534                         value = 0;
1535         }
1536
1537         if (value == 0)
1538                 sbi->ll_rw_stats_on = 0;
1539         else
1540                 sbi->ll_rw_stats_on = 1;
1541
1542         spin_lock(&sbi->ll_process_lock);
1543         sbi->ll_offset_process_count = 0;
1544         sbi->ll_rw_offset_entry_count = 0;
1545         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1546                LL_PROCESS_HIST_MAX);
1547         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1548                LL_OFFSET_HIST_MAX);
1549         spin_unlock(&sbi->ll_process_lock);
1550
1551         return len;
1552 }
1553
1554 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1555 #endif /* LPROCFS */