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         spin_lock(&sbi->ll_lock);
 440         diff = pages_number - cache->ccc_lru_max;
 441         spin_unlock(&sbi->ll_lock);
 442
 443         /* easy - add more LRU slots. */
 444         if (diff >= 0) {
 445                 atomic_add(diff, &cache->ccc_lru_left);
 446                 GOTO(out, rc = 0);
 447         }
 448
 449         env = cl_env_get(&refcheck);
 450         if (IS_ERR(env))
 451                 RETURN(rc);
 452
 453         diff = -diff;
 454         while (diff > 0) {
 455                 int tmp;
 456
 457                 /* reduce LRU budget from free slots. */
 458                 do {
 459                         int ov, nv;
 460
 461                         ov = atomic_read(&cache->ccc_lru_left);
 462                         if (ov == 0)
 463                                 break;
 464
 465                         nv = ov > diff ? ov - diff : 0;
 466                         rc = atomic_cmpxchg(&cache->ccc_lru_left, ov, nv);
 467                         if (likely(ov == rc)) {
 468                                 diff -= ov - nv;
 469                                 nrpages += ov - nv;
 470                                 break;
 471                         }
 472                 } while (1);
 473
 474                 if (diff <= 0)
 475                         break;
 476
 477                 if (sbi->ll_dt_exp == NULL) { /* being initialized */
 478                         rc = -ENODEV;
 479                         break;
 480                 }
 481
 482                 /* difficult - have to ask OSCs to drop LRU slots. */
 483                 tmp = diff << 1;
 484                 rc = obd_set_info_async(env, sbi->ll_dt_exp,
 485                                 sizeof(KEY_CACHE_LRU_SHRINK),
 486                                 KEY_CACHE_LRU_SHRINK,
 487                                 sizeof(tmp), &tmp, NULL);
 488                 if (rc < 0)
 489                         break;
 490         }
 491         cl_env_put(env, &refcheck);
 492
 493 out:
 494         if (rc >= 0) {
 495                 spin_lock(&sbi->ll_lock);
 496                 cache->ccc_lru_max = pages_number;
 497                 spin_unlock(&sbi->ll_lock);
 498                 rc = count;
 499         } else {
 500                 atomic_add(nrpages, &cache->ccc_lru_left);
 501         }
 502         return rc;
 503 }
 504 LPROC_SEQ_FOPS(ll_max_cached_mb);
 505
 506 static int ll_checksum_seq_show(struct seq_file *m, void *v)
 507 {
 508         struct super_block *sb = m->private;
 509         struct ll_sb_info *sbi = ll_s2sbi(sb);
 510
 511         return seq_printf(m, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 512 }
 513
 514 static ssize_t ll_checksum_seq_write(struct file *file, const char *buffer,
 515                                      size_t count, loff_t *off)
 516 {
 517         struct seq_file *m = file->private_data;
 518         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 519         int val, rc;
 520
 521         if (!sbi->ll_dt_exp)
 522                 /* Not set up yet */
 523                 return -EAGAIN;
 524
 525         rc = lprocfs_write_helper(buffer, count, &val);
 526         if (rc)
 527                 return rc;
 528         if (val)
 529                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 530         else
 531                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 532
 533         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 534                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 535         if (rc)
 536                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 537
 538         return count;
 539 }
 540 LPROC_SEQ_FOPS(ll_checksum);
 541
 542 static int ll_max_rw_chunk_seq_show(struct seq_file *m, void *v)
 543 {
 544         struct super_block *sb = m->private;
 545
 546         return seq_printf(m, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk);
 547 }
 548
 549 static ssize_t ll_max_rw_chunk_seq_write(struct file *file, const char *buffer,
 550                                          size_t count, loff_t *off)
 551 {
 552         struct seq_file *m = file->private_data;
 553         struct super_block *sb = m->private;
 554         int rc, val;
 555
 556         rc = lprocfs_write_helper(buffer, count, &val);
 557         if (rc)
 558                 return rc;
 559         ll_s2sbi(sb)->ll_max_rw_chunk = val;
 560         return count;
 561 }
 562 LPROC_SEQ_FOPS(ll_max_rw_chunk);
 563
 564 static int ll_rd_track_id(struct seq_file *m, enum stats_track_type type)
 565 {
 566         struct super_block *sb = m->private;
 567
 568         if (ll_s2sbi(sb)->ll_stats_track_type == type) {
 569                 return seq_printf(m, "%d\n",
 570                                   ll_s2sbi(sb)->ll_stats_track_id);
 571         } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
 572                 return seq_printf(m, "0 (all)\n");
 573         } else {
 574                 return seq_printf(m, "untracked\n");
 575         }
 576 }
 577
 578 static int ll_wr_track_id(const char *buffer, unsigned long count, void *data,
 579                           enum stats_track_type type)
 580 {
 581         struct super_block *sb = data;
 582         int rc, pid;
 583
 584         rc = lprocfs_write_helper(buffer, count, &pid);
 585         if (rc)
 586                 return rc;
 587         ll_s2sbi(sb)->ll_stats_track_id = pid;
 588         if (pid == 0)
 589                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 590         else
 591                 ll_s2sbi(sb)->ll_stats_track_type = type;
 592         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 593         return count;
 594 }
 595
 596 static int ll_track_pid_seq_show(struct seq_file *m, void *v)
 597 {
 598         return ll_rd_track_id(m, STATS_TRACK_PID);
 599 }
 600
 601 static ssize_t ll_track_pid_seq_write(struct file *file, const char *buffer,
 602                                       size_t count, loff_t *off)
 603 {
 604         struct seq_file *seq = file->private_data;
 605         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PID);
 606 }
 607 LPROC_SEQ_FOPS(ll_track_pid);
 608
 609 static int ll_track_ppid_seq_show(struct seq_file *m, void *v)
 610 {
 611         return ll_rd_track_id(m, STATS_TRACK_PPID);
 612 }
 613
 614 static ssize_t ll_track_ppid_seq_write(struct file *file, const char *buffer,
 615                                        size_t count, loff_t *off)
 616 {
 617         struct seq_file *seq = file->private_data;
 618         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PPID);
 619 }
 620 LPROC_SEQ_FOPS(ll_track_ppid);
 621
 622 static int ll_track_gid_seq_show(struct seq_file *m, void *v)
 623 {
 624         return ll_rd_track_id(m, STATS_TRACK_GID);
 625 }
 626
 627 static ssize_t ll_track_gid_seq_write(struct file *file, const char *buffer,
 628                                       size_t count, loff_t *off)
 629 {
 630         struct seq_file *seq = file->private_data;
 631         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_GID);
 632 }
 633 LPROC_SEQ_FOPS(ll_track_gid);
 634
 635 static int ll_statahead_max_seq_show(struct seq_file *m, void *v)
 636 {
 637         struct super_block *sb = m->private;
 638         struct ll_sb_info *sbi = ll_s2sbi(sb);
 639
 640         return seq_printf(m, "%u\n", sbi->ll_sa_max);
 641 }
 642
 643 static ssize_t ll_statahead_max_seq_write(struct file *file, const char *buffer,
 644                                           size_t count, loff_t *off)
 645 {
 646         struct seq_file *m = file->private_data;
 647         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 648         int val, rc;
 649
 650         rc = lprocfs_write_helper(buffer, count, &val);
 651         if (rc)
 652                 return rc;
 653
 654         if (val >= 0 && val <= LL_SA_RPC_MAX)
 655                 sbi->ll_sa_max = val;
 656         else
 657                 CERROR("Bad statahead_max value %d. Valid values are in the "
 658                        "range [0, %d]\n", val, LL_SA_RPC_MAX);
 659
 660         return count;
 661 }
 662 LPROC_SEQ_FOPS(ll_statahead_max);
 663
 664 static int ll_statahead_agl_seq_show(struct seq_file *m, void *v)
 665 {
 666         struct super_block *sb = m->private;
 667         struct ll_sb_info *sbi = ll_s2sbi(sb);
 668
 669         return seq_printf(m, "%u\n",
 670                           sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
 671 }
 672
 673 static ssize_t ll_statahead_agl_seq_write(struct file *file, const char *buffer,
 674                                           size_t count, loff_t *off)
 675 {
 676         struct seq_file *m = file->private_data;
 677         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 678         int val, rc;
 679
 680         rc = lprocfs_write_helper(buffer, count, &val);
 681         if (rc)
 682                 return rc;
 683
 684         if (val)
 685                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 686         else
 687                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
 688
 689         return count;
 690 }
 691 LPROC_SEQ_FOPS(ll_statahead_agl);
 692
 693 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
 694 {
 695         struct super_block *sb = m->private;
 696         struct ll_sb_info *sbi = ll_s2sbi(sb);
 697
 698         return seq_printf(m,
 699                         "statahead total: %u\n"
 700                         "statahead wrong: %u\n"
 701                         "agl total: %u\n",
 702                         atomic_read(&sbi->ll_sa_total),
 703                         atomic_read(&sbi->ll_sa_wrong),
 704                         atomic_read(&sbi->ll_agl_total));
 705 }
 706 LPROC_SEQ_FOPS_RO(ll_statahead_stats);
 707
 708 static int ll_lazystatfs_seq_show(struct seq_file *m, void *v)
 709 {
 710         struct super_block *sb = m->private;
 711         struct ll_sb_info *sbi = ll_s2sbi(sb);
 712
 713         return seq_printf(m, "%u\n",
 714                           (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 715 }
 716
 717 static ssize_t ll_lazystatfs_seq_write(struct file *file, const char *buffer,
 718                                         size_t count, loff_t *off)
 719 {
 720         struct seq_file *m = file->private_data;
 721         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 722         int val, rc;
 723
 724         rc = lprocfs_write_helper(buffer, count, &val);
 725         if (rc)
 726                 return rc;
 727
 728         if (val)
 729                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 730         else
 731                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 732
 733         return count;
 734 }
 735 LPROC_SEQ_FOPS(ll_lazystatfs);
 736
 737 static int ll_max_easize_seq_show(struct seq_file *m, void *v)
 738 {
 739         struct super_block *sb = m->private;
 740         struct ll_sb_info *sbi = ll_s2sbi(sb);
 741         unsigned int ealen;
 742         int rc;
 743
 744         rc = ll_get_max_mdsize(sbi, &ealen);
 745         if (rc)
 746                 return rc;
 747
 748         return seq_printf(m, "%u\n", ealen);
 749 }
 750 LPROC_SEQ_FOPS_RO(ll_max_easize);
 751
 752 static int ll_defult_easize_seq_show(struct seq_file *m, void *v)
 753 {
 754         struct super_block *sb = m->private;
 755         struct ll_sb_info *sbi = ll_s2sbi(sb);
 756         unsigned int ealen;
 757         int rc;
 758
 759         rc = ll_get_default_mdsize(sbi, &ealen);
 760         if (rc)
 761                 return rc;
 762
 763         return seq_printf(m, "%u\n", ealen);
 764 }
 765 LPROC_SEQ_FOPS_RO(ll_defult_easize);
 766
 767 static int ll_max_cookiesize_seq_show(struct seq_file *m, void *v)
 768 {
 769         struct super_block *sb = m->private;
 770         struct ll_sb_info *sbi = ll_s2sbi(sb);
 771         unsigned int cookielen;
 772         int rc;
 773
 774         rc = ll_get_max_cookiesize(sbi, &cookielen);
 775         if (rc)
 776                 return rc;
 777
 778         return seq_printf(m, "%u\n", cookielen);
 779 }
 780 LPROC_SEQ_FOPS_RO(ll_max_cookiesize);
 781
 782 static int ll_defult_cookiesize_seq_show(struct seq_file *m, void *v)
 783 {
 784         struct super_block *sb = m->private;
 785         struct ll_sb_info *sbi = ll_s2sbi(sb);
 786         unsigned int cookielen;
 787         int rc;
 788
 789         rc = ll_get_default_cookiesize(sbi, &cookielen);
 790         if (rc)
 791                 return rc;
 792
 793         return seq_printf(m, "%u\n", cookielen);
 794 }
 795 LPROC_SEQ_FOPS_RO(ll_defult_cookiesize);
 796
 797 static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
 798 {
 799         const char *str[] = LL_SBI_FLAGS;
 800         struct super_block *sb = m->private;
 801         int flags = ll_s2sbi(sb)->ll_flags;
 802         int i = 0;
 803
 804         while (flags != 0) {
 805                 if (ARRAY_SIZE(str) <= i) {
 806                         CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
 807                                 "flags please.\n", ll_get_fsname(sb, NULL, 0));
 808                         return -EINVAL;
 809                 }
 810
 811                 if (flags & 0x1)
 812                         seq_printf(m, "%s ", str[i]);
 813                 flags >>= 1;
 814                 ++i;
 815         }
 816         seq_printf(m, "\b\n");
 817         return 0;
 818 }
 819 LPROC_SEQ_FOPS_RO(ll_sbi_flags);
 820
 821 static int ll_unstable_stats_seq_show(struct seq_file *m, void *v)
 822 {
 823         struct super_block      *sb    = m->private;
 824         struct ll_sb_info       *sbi   = ll_s2sbi(sb);
 825         struct cl_client_cache  *cache = &sbi->ll_cache;
 826         int pages, mb;
 827
 828         pages = atomic_read(&cache->ccc_unstable_nr);
 829         mb    = (pages * PAGE_CACHE_SIZE) >> 20;
 830
 831         return seq_printf(m, "unstable_check: %8d\n"
 832                              "unstable_pages: %8d\n"
 833                              "unstable_mb:    %8d\n",
 834                           cache->ccc_unstable_check, pages, mb);
 835 }
 836
 837 static ssize_t ll_unstable_stats_seq_write(struct file *file,
 838                                            const char __user *buffer,
 839                                            size_t count, loff_t *unused)
 840 {
 841         struct seq_file *seq = file->private_data;
 842         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)seq->private);
 843         char kernbuf[128];
 844         int val, rc;
 845
 846         if (count == 0)
 847                 return 0;
 848         if (count >= sizeof(kernbuf))
 849                 return -EINVAL;
 850
 851         if (copy_from_user(kernbuf, buffer, count))
 852                 return -EFAULT;
 853         kernbuf[count] = 0;
 854
 855         buffer += lprocfs_find_named_value(kernbuf, "unstable_check:", &count) -
 856                   kernbuf;
 857         rc = lprocfs_write_helper(buffer, count, &val);
 858         if (rc < 0)
 859                 return rc;
 860
 861         /* borrow lru lock to set the value */
 862         spin_lock(&sbi->ll_cache.ccc_lru_lock);
 863         sbi->ll_cache.ccc_unstable_check = !!val;
 864         spin_unlock(&sbi->ll_cache.ccc_lru_lock);
 865
 866         return count;
 867 }
 868 LPROC_SEQ_FOPS(ll_unstable_stats);
 869
 870 static int ll_root_squash_seq_show(struct seq_file *m, void *v)
 871 {
 872         struct super_block *sb = m->private;
 873         struct ll_sb_info *sbi = ll_s2sbi(sb);
 874         struct root_squash_info *squash = &sbi->ll_squash;
 875
 876         return seq_printf(m, "%u:%u\n", squash->rsi_uid, squash->rsi_gid);
 877 }
 878
 879 static ssize_t ll_root_squash_seq_write(struct file *file,
 880                                         const char __user *buffer,
 881                                         size_t count, loff_t *off)
 882 {
 883         struct seq_file *m = file->private_data;
 884         struct super_block *sb = m->private;
 885         struct ll_sb_info *sbi = ll_s2sbi(sb);
 886         struct root_squash_info *squash = &sbi->ll_squash;
 887
 888         return lprocfs_wr_root_squash(buffer, count, squash,
 889                                       ll_get_fsname(sb, NULL, 0));
 890 }
 891 LPROC_SEQ_FOPS(ll_root_squash);
 892
 893 static int ll_nosquash_nids_seq_show(struct seq_file *m, void *v)
 894 {
 895         struct super_block *sb = m->private;
 896         struct ll_sb_info *sbi = ll_s2sbi(sb);
 897         struct root_squash_info *squash = &sbi->ll_squash;
 898         int len, rc;
 899
 900         down_read(&squash->rsi_sem);
 901         if (!list_empty(&squash->rsi_nosquash_nids)) {
 902                 len = cfs_print_nidlist(m->buf + m->count, m->size - m->count,
 903                                         &squash->rsi_nosquash_nids);
 904                 m->count += len;
 905                 rc = seq_printf(m, "\n");
 906         } else {
 907                 rc = seq_printf(m, "NONE\n");
 908         }
 909         up_read(&squash->rsi_sem);
 910
 911         return rc;
 912 }
 913
 914 static ssize_t ll_nosquash_nids_seq_write(struct file *file,
 915                                           const char __user *buffer,
 916                                           size_t count, loff_t *off)
 917 {
 918         struct seq_file *m = file->private_data;
 919         struct super_block *sb = m->private;
 920         struct ll_sb_info *sbi = ll_s2sbi(sb);
 921         struct root_squash_info *squash = &sbi->ll_squash;
 922         int rc;
 923
 924         rc = lprocfs_wr_nosquash_nids(buffer, count, squash,
 925                                       ll_get_fsname(sb, NULL, 0));
 926         if (rc < 0)
 927                 return rc;
 928
 929         ll_compute_rootsquash_state(sbi);
 930
 931         return rc;
 932 }
 933 LPROC_SEQ_FOPS(ll_nosquash_nids);
 934
 935 struct lprocfs_seq_vars lprocfs_llite_obd_vars[] = {
 936         { .name =       "uuid",
 937           .fops =       &ll_sb_uuid_fops                        },
 938         { .name =       "fstype",
 939           .fops =       &ll_fstype_fops                         },
 940         { .name =       "site",
 941           .fops =       &ll_site_stats_fops                     },
 942         { .name =       "blocksize",
 943           .fops =       &ll_blksize_fops                        },
 944         { .name =       "kbytestotal",
 945           .fops =       &ll_kbytestotal_fops                    },
 946         { .name =       "kbytesfree",
 947           .fops =       &ll_kbytesfree_fops                     },
 948         { .name =       "kbytesavail",
 949           .fops =       &ll_kbytesavail_fops                    },
 950         { .name =       "filestotal",
 951           .fops =       &ll_filestotal_fops                     },
 952         { .name =       "filesfree",
 953           .fops =       &ll_filesfree_fops                      },
 954         { .name =       "client_type",
 955           .fops =       &ll_client_type_fops                    },
 956         { .name =       "max_read_ahead_mb",
 957           .fops =       &ll_max_readahead_mb_fops               },
 958         { .name =       "max_read_ahead_per_file_mb",
 959           .fops =       &ll_max_readahead_per_file_mb_fops      },
 960         { .name =       "max_read_ahead_whole_mb",
 961           .fops =       &ll_max_read_ahead_whole_mb_fops        },
 962         { .name =       "max_cached_mb",
 963           .fops =       &ll_max_cached_mb_fops                  },
 964         { .name =       "checksum_pages",
 965           .fops =       &ll_checksum_fops                       },
 966         { .name =       "max_rw_chunk",
 967           .fops =       &ll_max_rw_chunk_fops                   },
 968         { .name =       "stats_track_pid",
 969           .fops =       &ll_track_pid_fops                      },
 970         { .name =       "stats_track_ppid",
 971           .fops =       &ll_track_ppid_fops                     },
 972         { .name =       "stats_track_gid",
 973           .fops =       &ll_track_gid_fops                      },
 974         { .name =       "statahead_max",
 975           .fops =       &ll_statahead_max_fops                  },
 976         { .name =       "statahead_agl",
 977           .fops =       &ll_statahead_agl_fops                  },
 978         { .name =       "statahead_stats",
 979           .fops =       &ll_statahead_stats_fops                },
 980         { .name =       "lazystatfs",
 981           .fops =       &ll_lazystatfs_fops                     },
 982         { .name =       "max_easize",
 983           .fops =       &ll_max_easize_fops                     },
 984         { .name =       "default_easize",
 985           .fops =       &ll_defult_easize_fops                  },
 986         { .name =       "max_cookiesize",
 987           .fops =       &ll_max_cookiesize_fops                 },
 988         { .name =       "default_cookiesize",
 989           .fops =       &ll_defult_cookiesize_fops              },
 990         { .name =       "sbi_flags",
 991           .fops =       &ll_sbi_flags_fops                      },
 992         { .name =       "xattr_cache",
 993           .fops =       &ll_xattr_cache_fops                    },
 994         { .name =       "unstable_stats",
 995           .fops =       &ll_unstable_stats_fops                 },
 996         { .name =       "root_squash",
 997           .fops =       &ll_root_squash_fops                    },
 998         { .name =       "nosquash_nids",
 999           .fops =       &ll_nosquash_nids_fops                  },
1000         { 0 }
1001 };
1002
1003 #define MAX_STRING_SIZE 128
1004
1005 static const struct llite_file_opcode {
1006         __u32       opcode;
1007         __u32       type;
1008         const char *opname;
1009 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
1010         /* file operation */
1011         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
1012         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
1013         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
1014                                    "read_bytes" },
1015         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
1016                                    "write_bytes" },
1017         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
1018                                    "brw_read" },
1019         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
1020                                    "brw_write" },
1021         { LPROC_LL_OSC_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
1022                                    "osc_read" },
1023         { LPROC_LL_OSC_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
1024                                    "osc_write" },
1025         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
1026         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
1027         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
1028         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
1029         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
1030         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
1031         { LPROC_LL_READDIR,        LPROCFS_TYPE_REGS, "readdir" },
1032         /* inode operation */
1033         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
1034         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "truncate" },
1035         { LPROC_LL_FLOCK,          LPROCFS_TYPE_REGS, "flock" },
1036         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
1037         /* dir inode operation */
1038         { LPROC_LL_CREATE,         LPROCFS_TYPE_REGS, "create" },
1039         { LPROC_LL_LINK,           LPROCFS_TYPE_REGS, "link" },
1040         { LPROC_LL_UNLINK,         LPROCFS_TYPE_REGS, "unlink" },
1041         { LPROC_LL_SYMLINK,        LPROCFS_TYPE_REGS, "symlink" },
1042         { LPROC_LL_MKDIR,          LPROCFS_TYPE_REGS, "mkdir" },
1043         { LPROC_LL_RMDIR,          LPROCFS_TYPE_REGS, "rmdir" },
1044         { LPROC_LL_MKNOD,          LPROCFS_TYPE_REGS, "mknod" },
1045         { LPROC_LL_RENAME,         LPROCFS_TYPE_REGS, "rename" },
1046         /* special inode operation */
1047         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
1048         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
1049         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
1050         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
1051         { LPROC_LL_GETXATTR_HITS,  LPROCFS_TYPE_REGS, "getxattr_hits" },
1052         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
1053         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
1054         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
1055 };
1056
1057 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
1058 {
1059         if (!sbi->ll_stats)
1060                 return;
1061         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
1062                 lprocfs_counter_add(sbi->ll_stats, op, count);
1063         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
1064                  sbi->ll_stats_track_id == current->pid)
1065                 lprocfs_counter_add(sbi->ll_stats, op, count);
1066         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
1067                  sbi->ll_stats_track_id == current->parent->pid)
1068                 lprocfs_counter_add(sbi->ll_stats, op, count);
1069         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
1070                  sbi->ll_stats_track_id ==
1071                         from_kgid(&init_user_ns, current_gid()))
1072                 lprocfs_counter_add(sbi->ll_stats, op, count);
1073 }
1074 EXPORT_SYMBOL(ll_stats_ops_tally);
1075
1076 static const char *ra_stat_string[] = {
1077         [RA_STAT_HIT] = "hits",
1078         [RA_STAT_MISS] = "misses",
1079         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
1080         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
1081         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
1082         [RA_STAT_FAILED_MATCH] = "failed lock match",
1083         [RA_STAT_DISCARDED] = "read but discarded",
1084         [RA_STAT_ZERO_LEN] = "zero length file",
1085         [RA_STAT_ZERO_WINDOW] = "zero size window",
1086         [RA_STAT_EOF] = "read-ahead to EOF",
1087         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
1088         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
1089         [RA_STAT_FAILED_REACH_END] = "failed to reach end"
1090 };
1091
1092 LPROC_SEQ_FOPS_RO_TYPE(llite, name);
1093 LPROC_SEQ_FOPS_RO_TYPE(llite, uuid);
1094
1095 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
1096                                 struct super_block *sb, char *osc, char *mdc)
1097 {
1098         struct lprocfs_seq_vars lvars[2];
1099         struct lustre_sb_info *lsi = s2lsi(sb);
1100         struct ll_sb_info *sbi = ll_s2sbi(sb);
1101         struct obd_device *obd;
1102         struct proc_dir_entry *dir;
1103         char name[MAX_STRING_SIZE + 1], *ptr;
1104         int err, id, len, rc;
1105         ENTRY;
1106
1107         memset(lvars, 0, sizeof(lvars));
1108
1109         name[MAX_STRING_SIZE] = '\0';
1110         lvars[0].name = name;
1111
1112         LASSERT(sbi != NULL);
1113         LASSERT(mdc != NULL);
1114         LASSERT(osc != NULL);
1115
1116         /* Get fsname */
1117         len = strlen(lsi->lsi_lmd->lmd_profile);
1118         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
1119         if (ptr && (strcmp(ptr, "-client") == 0))
1120                 len -= 7;
1121
1122         /* Mount info */
1123         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
1124                  lsi->lsi_lmd->lmd_profile, sb);
1125
1126         sbi->ll_proc_root = lprocfs_seq_register(name, parent, NULL, NULL);
1127         if (IS_ERR(sbi->ll_proc_root)) {
1128                 err = PTR_ERR(sbi->ll_proc_root);
1129                 sbi->ll_proc_root = NULL;
1130                 RETURN(err);
1131         }
1132
1133         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
1134                                 &vvp_dump_pgcache_file_ops, sbi);
1135         if (rc)
1136                 CWARN("Error adding the dump_page_cache file\n");
1137
1138         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
1139                                 &ll_rw_extents_stats_fops, sbi);
1140         if (rc)
1141                 CWARN("Error adding the extent_stats file\n");
1142
1143         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
1144                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
1145         if (rc)
1146                 CWARN("Error adding the extents_stats_per_process file\n");
1147
1148         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
1149                                 &ll_rw_offset_stats_fops, sbi);
1150         if (rc)
1151                 CWARN("Error adding the offset_stats file\n");
1152
1153         /* File operations stats */
1154         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
1155                                             LPROCFS_STATS_FLAG_NONE);
1156         if (sbi->ll_stats == NULL)
1157                 GOTO(out, err = -ENOMEM);
1158         /* do counter init */
1159         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
1160                 __u32 type = llite_opcode_table[id].type;
1161                 void *ptr = NULL;
1162                 if (type & LPROCFS_TYPE_REGS)
1163                         ptr = "regs";
1164                 else if (type & LPROCFS_TYPE_BYTES)
1165                         ptr = "bytes";
1166                 else if (type & LPROCFS_TYPE_PAGES)
1167                         ptr = "pages";
1168                 lprocfs_counter_init(sbi->ll_stats,
1169                                      llite_opcode_table[id].opcode,
1170                                      (type & LPROCFS_CNTR_AVGMINMAX),
1171                                      llite_opcode_table[id].opname, ptr);
1172         }
1173         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
1174         if (err)
1175                 GOTO(out, err);
1176
1177         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1178                                                LPROCFS_STATS_FLAG_NONE);
1179         if (sbi->ll_ra_stats == NULL)
1180                 GOTO(out, err = -ENOMEM);
1181
1182         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1183                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
1184                                      ra_stat_string[id], "pages");
1185         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
1186                                      sbi->ll_ra_stats);
1187         if (err)
1188                 GOTO(out, err);
1189
1190
1191         err = lprocfs_seq_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
1192         if (err)
1193                 GOTO(out, err);
1194
1195         /* MDC info */
1196         obd = class_name2obd(mdc);
1197
1198         LASSERT(obd != NULL);
1199         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1200         LASSERT(obd->obd_type->typ_name != NULL);
1201
1202         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1203         if (dir == NULL)
1204                 GOTO(out, err = -ENOMEM);
1205
1206         snprintf(name, MAX_STRING_SIZE, "common_name");
1207         lvars[0].fops = &llite_name_fops;
1208         err = lprocfs_seq_add_vars(dir, lvars, obd);
1209         if (err)
1210                 GOTO(out, err);
1211
1212         snprintf(name, MAX_STRING_SIZE, "uuid");
1213         lvars[0].fops = &llite_uuid_fops;
1214         err = lprocfs_seq_add_vars(dir, lvars, obd);
1215         if (err)
1216                 GOTO(out, err);
1217
1218         /* OSC */
1219         obd = class_name2obd(osc);
1220
1221         LASSERT(obd != NULL);
1222         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1223         LASSERT(obd->obd_type->typ_name != NULL);
1224
1225         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1226         if (dir == NULL)
1227                 GOTO(out, err = -ENOMEM);
1228
1229         snprintf(name, MAX_STRING_SIZE, "common_name");
1230         lvars[0].fops = &llite_name_fops;
1231         err = lprocfs_seq_add_vars(dir, lvars, obd);
1232         if (err)
1233                 GOTO(out, err);
1234
1235         snprintf(name, MAX_STRING_SIZE, "uuid");
1236         lvars[0].fops = &llite_uuid_fops;
1237         err = lprocfs_seq_add_vars(dir, lvars, obd);
1238 out:
1239         if (err) {
1240                 lprocfs_remove(&sbi->ll_proc_root);
1241                 lprocfs_free_stats(&sbi->ll_ra_stats);
1242                 lprocfs_free_stats(&sbi->ll_stats);
1243         }
1244         RETURN(err);
1245 }
1246
1247 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
1248 {
1249         if (sbi->ll_proc_root) {
1250                 lprocfs_remove(&sbi->ll_proc_root);
1251                 lprocfs_free_stats(&sbi->ll_ra_stats);
1252                 lprocfs_free_stats(&sbi->ll_stats);
1253         }
1254 }
1255 #undef MAX_STRING_SIZE
1256
1257 #define pct(a,b) (b ? a * 100 / b : 0)
1258
1259 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1260                                    struct seq_file *seq, int which)
1261 {
1262         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1263         unsigned long start, end, r, w;
1264         char *unitp = "KMGTPEZY";
1265         int i, units = 10;
1266         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1267
1268         read_cum = 0;
1269         write_cum = 0;
1270         start = 0;
1271
1272         for(i = 0; i < LL_HIST_MAX; i++) {
1273                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1274                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1275         }
1276
1277         for(i = 0; i < LL_HIST_MAX; i++) {
1278                 r = pp_info->pp_r_hist.oh_buckets[i];
1279                 w = pp_info->pp_w_hist.oh_buckets[i];
1280                 read_cum += r;
1281                 write_cum += w;
1282                 end = 1 << (i + LL_HIST_START - units);
1283                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
1284                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
1285                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1286                            r, pct(r, read_tot), pct(read_cum, read_tot),
1287                            w, pct(w, write_tot), pct(write_cum, write_tot));
1288                 start = end;
1289                 if (start == 1<<10) {
1290                         start = 1;
1291                         units += 10;
1292                         unitp++;
1293                 }
1294                 if (read_cum == read_tot && write_cum == write_tot)
1295                         break;
1296         }
1297 }
1298
1299 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1300 {
1301         struct timeval now;
1302         struct ll_sb_info *sbi = seq->private;
1303         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1304         int k;
1305
1306         do_gettimeofday(&now);
1307
1308         if (!sbi->ll_rw_stats_on) {
1309                 seq_printf(seq, "disabled\n"
1310                                 "write anything in this file to activate, "
1311                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1312                 return 0;
1313         }
1314         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1315                    now.tv_sec, now.tv_usec);
1316         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1317         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1318                    "extents", "calls", "%", "cum%",
1319                    "calls", "%", "cum%");
1320         spin_lock(&sbi->ll_pp_extent_lock);
1321         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1322                 if (io_extents->pp_extents[k].pid != 0) {
1323                         seq_printf(seq, "\nPID: %d\n",
1324                                    io_extents->pp_extents[k].pid);
1325                         ll_display_extents_info(io_extents, seq, k);
1326                 }
1327         }
1328         spin_unlock(&sbi->ll_pp_extent_lock);
1329         return 0;
1330 }
1331
1332 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1333                                                 const char __user *buf,
1334                                                 size_t len,
1335                                                 loff_t *off)
1336 {
1337         struct seq_file *seq = file->private_data;
1338         struct ll_sb_info *sbi = seq->private;
1339         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1340         int i;
1341         int value = 1, rc = 0;
1342
1343         if (len == 0)
1344                 return -EINVAL;
1345
1346         rc = lprocfs_write_helper(buf, len, &value);
1347         if (rc < 0 && len < 16) {
1348                 char kernbuf[16];
1349
1350                 if (copy_from_user(kernbuf, buf, len))
1351                         return -EFAULT;
1352                 kernbuf[len] = 0;
1353
1354                 if (kernbuf[len - 1] == '\n')
1355                         kernbuf[len - 1] = 0;
1356
1357                 if (strcmp(kernbuf, "disabled") == 0 ||
1358                     strcmp(kernbuf, "Disabled") == 0)
1359                         value = 0;
1360         }
1361
1362         if (value == 0)
1363                 sbi->ll_rw_stats_on = 0;
1364         else
1365                 sbi->ll_rw_stats_on = 1;
1366
1367         spin_lock(&sbi->ll_pp_extent_lock);
1368         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1369                 io_extents->pp_extents[i].pid = 0;
1370                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1371                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1372         }
1373         spin_unlock(&sbi->ll_pp_extent_lock);
1374         return len;
1375 }
1376
1377 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1378
1379 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1380 {
1381         struct timeval now;
1382         struct ll_sb_info *sbi = seq->private;
1383         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1384
1385         do_gettimeofday(&now);
1386
1387         if (!sbi->ll_rw_stats_on) {
1388                 seq_printf(seq, "disabled\n"
1389                                 "write anything in this file to activate, "
1390                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1391                 return 0;
1392         }
1393         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1394                    now.tv_sec, now.tv_usec);
1395
1396         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1397         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1398                    "extents", "calls", "%", "cum%",
1399                    "calls", "%", "cum%");
1400         spin_lock(&sbi->ll_lock);
1401         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1402         spin_unlock(&sbi->ll_lock);
1403
1404         return 0;
1405 }
1406
1407 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
1408                                              const char __user *buf,
1409                                              size_t len, loff_t *off)
1410 {
1411         struct seq_file *seq = file->private_data;
1412         struct ll_sb_info *sbi = seq->private;
1413         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1414         int i;
1415         int value = 1, rc = 0;
1416
1417         if (len == 0)
1418                 return -EINVAL;
1419
1420         rc = lprocfs_write_helper(buf, len, &value);
1421         if (rc < 0 && len < 16) {
1422                 char kernbuf[16];
1423
1424                 if (copy_from_user(kernbuf, buf, len))
1425                         return -EFAULT;
1426                 kernbuf[len] = 0;
1427
1428                 if (kernbuf[len - 1] == '\n')
1429                         kernbuf[len - 1] = 0;
1430
1431                 if (strcmp(kernbuf, "disabled") == 0 ||
1432                     strcmp(kernbuf, "Disabled") == 0)
1433                         value = 0;
1434         }
1435
1436         if (value == 0)
1437                 sbi->ll_rw_stats_on = 0;
1438         else
1439                 sbi->ll_rw_stats_on = 1;
1440
1441         spin_lock(&sbi->ll_pp_extent_lock);
1442         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1443                 io_extents->pp_extents[i].pid = 0;
1444                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1445                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1446         }
1447         spin_unlock(&sbi->ll_pp_extent_lock);
1448
1449         return len;
1450 }
1451 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1452
1453 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1454                        struct ll_file_data *file, loff_t pos,
1455                        size_t count, int rw)
1456 {
1457         int i, cur = -1;
1458         struct ll_rw_process_info *process;
1459         struct ll_rw_process_info *offset;
1460         int *off_count = &sbi->ll_rw_offset_entry_count;
1461         int *process_count = &sbi->ll_offset_process_count;
1462         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1463
1464         if(!sbi->ll_rw_stats_on)
1465                 return;
1466         process = sbi->ll_rw_process_info;
1467         offset = sbi->ll_rw_offset_info;
1468
1469         spin_lock(&sbi->ll_pp_extent_lock);
1470         /* Extent statistics */
1471         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1472                 if(io_extents->pp_extents[i].pid == pid) {
1473                         cur = i;
1474                         break;
1475                 }
1476         }
1477
1478         if (cur == -1) {
1479                 /* new process */
1480                 sbi->ll_extent_process_count =
1481                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1482                 cur = sbi->ll_extent_process_count;
1483                 io_extents->pp_extents[cur].pid = pid;
1484                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1485                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1486         }
1487
1488         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1489              (i < (LL_HIST_MAX - 1)); i++);
1490         if (rw == 0) {
1491                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1492                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1493         } else {
1494                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1495                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1496         }
1497         spin_unlock(&sbi->ll_pp_extent_lock);
1498
1499         spin_lock(&sbi->ll_process_lock);
1500         /* Offset statistics */
1501         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1502                 if (process[i].rw_pid == pid) {
1503                         if (process[i].rw_last_file != file) {
1504                                 process[i].rw_range_start = pos;
1505                                 process[i].rw_last_file_pos = pos + count;
1506                                 process[i].rw_smallest_extent = count;
1507                                 process[i].rw_largest_extent = count;
1508                                 process[i].rw_offset = 0;
1509                                 process[i].rw_last_file = file;
1510                                 spin_unlock(&sbi->ll_process_lock);
1511                                 return;
1512                         }
1513                         if (process[i].rw_last_file_pos != pos) {
1514                                 *off_count =
1515                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1516                                 offset[*off_count].rw_op = process[i].rw_op;
1517                                 offset[*off_count].rw_pid = pid;
1518                                 offset[*off_count].rw_range_start =
1519                                         process[i].rw_range_start;
1520                                 offset[*off_count].rw_range_end =
1521                                         process[i].rw_last_file_pos;
1522                                 offset[*off_count].rw_smallest_extent =
1523                                         process[i].rw_smallest_extent;
1524                                 offset[*off_count].rw_largest_extent =
1525                                         process[i].rw_largest_extent;
1526                                 offset[*off_count].rw_offset =
1527                                         process[i].rw_offset;
1528                                 process[i].rw_op = rw;
1529                                 process[i].rw_range_start = pos;
1530                                 process[i].rw_smallest_extent = count;
1531                                 process[i].rw_largest_extent = count;
1532                                 process[i].rw_offset = pos -
1533                                         process[i].rw_last_file_pos;
1534                         }
1535                         if(process[i].rw_smallest_extent > count)
1536                                 process[i].rw_smallest_extent = count;
1537                         if(process[i].rw_largest_extent < count)
1538                                 process[i].rw_largest_extent = count;
1539                         process[i].rw_last_file_pos = pos + count;
1540                         spin_unlock(&sbi->ll_process_lock);
1541                         return;
1542                 }
1543         }
1544         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1545         process[*process_count].rw_pid = pid;
1546         process[*process_count].rw_op = rw;
1547         process[*process_count].rw_range_start = pos;
1548         process[*process_count].rw_last_file_pos = pos + count;
1549         process[*process_count].rw_smallest_extent = count;
1550         process[*process_count].rw_largest_extent = count;
1551         process[*process_count].rw_offset = 0;
1552         process[*process_count].rw_last_file = file;
1553         spin_unlock(&sbi->ll_process_lock);
1554 }
1555
1556 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1557 {
1558         struct timeval now;
1559         struct ll_sb_info *sbi = seq->private;
1560         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1561         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1562         int i;
1563
1564         do_gettimeofday(&now);
1565
1566         if (!sbi->ll_rw_stats_on) {
1567                 seq_printf(seq, "disabled\n"
1568                                 "write anything in this file to activate, "
1569                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1570                 return 0;
1571         }
1572         spin_lock(&sbi->ll_process_lock);
1573
1574         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1575                    now.tv_sec, now.tv_usec);
1576         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1577                    "R/W", "PID", "RANGE START", "RANGE END",
1578                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1579
1580         /* We stored the discontiguous offsets here; print them first */
1581         for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1582                 if (offset[i].rw_pid != 0)
1583                         seq_printf(seq,
1584                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1585                                    offset[i].rw_op == READ ? 'R' : 'W',
1586                                    offset[i].rw_pid,
1587                                    offset[i].rw_range_start,
1588                                    offset[i].rw_range_end,
1589                                    (unsigned long)offset[i].rw_smallest_extent,
1590                                    (unsigned long)offset[i].rw_largest_extent,
1591                                    offset[i].rw_offset);
1592         }
1593
1594         /* Then print the current offsets for each process */
1595         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1596                 if (process[i].rw_pid != 0)
1597                         seq_printf(seq,
1598                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1599                                    process[i].rw_op == READ ? 'R' : 'W',
1600                                    process[i].rw_pid,
1601                                    process[i].rw_range_start,
1602                                    process[i].rw_last_file_pos,
1603                                    (unsigned long)process[i].rw_smallest_extent,
1604                                    (unsigned long)process[i].rw_largest_extent,
1605                                    process[i].rw_offset);
1606         }
1607         spin_unlock(&sbi->ll_process_lock);
1608
1609         return 0;
1610 }
1611
1612 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
1613                                             const char __user *buf,
1614                                             size_t len, loff_t *off)
1615 {
1616         struct seq_file *seq = file->private_data;
1617         struct ll_sb_info *sbi = seq->private;
1618         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1619         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1620         int value = 1, rc = 0;
1621
1622         if (len == 0)
1623                 return -EINVAL;
1624
1625         rc = lprocfs_write_helper(buf, len, &value);
1626
1627         if (rc < 0 && len < 16) {
1628                 char kernbuf[16];
1629
1630                 if (copy_from_user(kernbuf, buf, len))
1631                         return -EFAULT;
1632                 kernbuf[len] = 0;
1633
1634                 if (kernbuf[len - 1] == '\n')
1635                         kernbuf[len - 1] = 0;
1636
1637                 if (strcmp(kernbuf, "disabled") == 0 ||
1638                     strcmp(kernbuf, "Disabled") == 0)
1639                         value = 0;
1640         }
1641
1642         if (value == 0)
1643                 sbi->ll_rw_stats_on = 0;
1644         else
1645                 sbi->ll_rw_stats_on = 1;
1646
1647         spin_lock(&sbi->ll_process_lock);
1648         sbi->ll_offset_process_count = 0;
1649         sbi->ll_rw_offset_entry_count = 0;
1650         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1651                LL_PROCESS_HIST_MAX);
1652         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1653                LL_OFFSET_HIST_MAX);
1654         spin_unlock(&sbi->ll_process_lock);
1655
1656         return len;
1657 }
1658
1659 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1660 #endif /* LPROCFS */