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, 2014, 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 <linux/user_namespace.h>
  40 #ifdef HAVE_UIDGID_HEADER
  41 # include <linux/uidgid.h>
  42 #endif
  43 #include <lustre_param.h>
  44 #include <lprocfs_status.h>
  45 #include <obd_support.h>
  46
  47 #include "llite_internal.h"
  48 #include "vvp_internal.h"
  49
  50 struct proc_dir_entry *proc_lustre_fs_root;
  51
  52 #ifdef CONFIG_PROC_FS
  53 /* /proc/lustre/llite mount point registration */
  54 static const struct file_operations ll_rw_extents_stats_fops;
  55 static const struct file_operations ll_rw_extents_stats_pp_fops;
  56 static const struct file_operations ll_rw_offset_stats_fops;
  57
  58 static int ll_blksize_seq_show(struct seq_file *m, void *v)
  59 {
  60         struct super_block *sb = m->private;
  61         struct obd_statfs osfs;
  62         int rc;
  63
  64         LASSERT(sb != NULL);
  65         rc = ll_statfs_internal(sb, &osfs,
  66                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  67                                 OBD_STATFS_NODELAY);
  68         if (!rc)
  69                 rc = seq_printf(m, "%u\n", osfs.os_bsize);
  70         return rc;
  71 }
  72 LPROC_SEQ_FOPS_RO(ll_blksize);
  73
  74 static int ll_kbytestotal_seq_show(struct seq_file *m, void *v)
  75 {
  76         struct super_block *sb = m->private;
  77         struct obd_statfs osfs;
  78         int rc;
  79
  80         LASSERT(sb != NULL);
  81         rc = ll_statfs_internal(sb, &osfs,
  82                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  83                                 OBD_STATFS_NODELAY);
  84         if (!rc) {
  85                 __u32 blk_size = osfs.os_bsize >> 10;
  86                 __u64 result = osfs.os_blocks;
  87
  88                 while (blk_size >>= 1)
  89                         result <<= 1;
  90
  91                 rc = seq_printf(m, LPU64"\n", result);
  92         }
  93         return rc;
  94 }
  95 LPROC_SEQ_FOPS_RO(ll_kbytestotal);
  96
  97 static int ll_kbytesfree_seq_show(struct seq_file *m, void *v)
  98 {
  99         struct super_block *sb = m->private;
 100         struct obd_statfs osfs;
 101         int rc;
 102
 103         LASSERT(sb != NULL);
 104         rc = ll_statfs_internal(sb, &osfs,
 105                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 106                                 OBD_STATFS_NODELAY);
 107         if (!rc) {
 108                 __u32 blk_size = osfs.os_bsize >> 10;
 109                 __u64 result = osfs.os_bfree;
 110
 111                 while (blk_size >>= 1)
 112                         result <<= 1;
 113
 114                 rc = seq_printf(m, LPU64"\n", result);
 115         }
 116         return rc;
 117 }
 118 LPROC_SEQ_FOPS_RO(ll_kbytesfree);
 119
 120 static int ll_kbytesavail_seq_show(struct seq_file *m, void *v)
 121 {
 122         struct super_block *sb = m->private;
 123         struct obd_statfs osfs;
 124         int rc;
 125
 126         LASSERT(sb != NULL);
 127         rc = ll_statfs_internal(sb, &osfs,
 128                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 129                                 OBD_STATFS_NODELAY);
 130         if (!rc) {
 131                 __u32 blk_size = osfs.os_bsize >> 10;
 132                 __u64 result = osfs.os_bavail;
 133
 134                 while (blk_size >>= 1)
 135                         result <<= 1;
 136
 137                 rc = seq_printf(m, LPU64"\n", result);
 138         }
 139         return rc;
 140 }
 141 LPROC_SEQ_FOPS_RO(ll_kbytesavail);
 142
 143 static int ll_filestotal_seq_show(struct seq_file *m, void *v)
 144 {
 145         struct super_block *sb = m->private;
 146         struct obd_statfs osfs;
 147         int rc;
 148
 149         LASSERT(sb != NULL);
 150         rc = ll_statfs_internal(sb, &osfs,
 151                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 152                                 OBD_STATFS_NODELAY);
 153         if (!rc)
 154                 rc = seq_printf(m, LPU64"\n", osfs.os_files);
 155         return rc;
 156 }
 157 LPROC_SEQ_FOPS_RO(ll_filestotal);
 158
 159 static int ll_filesfree_seq_show(struct seq_file *m, void *v)
 160 {
 161         struct super_block *sb = m->private;
 162         struct obd_statfs osfs;
 163         int rc;
 164
 165         LASSERT(sb != NULL);
 166         rc = ll_statfs_internal(sb, &osfs,
 167                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 168                                 OBD_STATFS_NODELAY);
 169         if (!rc)
 170                 rc = seq_printf(m, LPU64"\n", osfs.os_ffree);
 171         return rc;
 172 }
 173 LPROC_SEQ_FOPS_RO(ll_filesfree);
 174
 175 static int ll_client_type_seq_show(struct seq_file *m, void *v)
 176 {
 177         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 178         int rc;
 179
 180         LASSERT(sbi != NULL);
 181
 182         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 183                 rc = seq_printf(m, "remote client\n");
 184         else
 185                 rc = seq_printf(m, "local client\n");
 186         return rc;
 187 }
 188 LPROC_SEQ_FOPS_RO(ll_client_type);
 189
 190 static int ll_fstype_seq_show(struct seq_file *m, void *v)
 191 {
 192         struct super_block *sb = m->private;
 193
 194         LASSERT(sb != NULL);
 195         return seq_printf(m, "%s\n", sb->s_type->name);
 196 }
 197 LPROC_SEQ_FOPS_RO(ll_fstype);
 198
 199 static int ll_sb_uuid_seq_show(struct seq_file *m, void *v)
 200 {
 201         struct super_block *sb = m->private;
 202
 203         LASSERT(sb != NULL);
 204         return seq_printf(m, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
 205 }
 206 LPROC_SEQ_FOPS_RO(ll_sb_uuid);
 207
 208 static int ll_xattr_cache_seq_show(struct seq_file *m, void *v)
 209 {
 210         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 211
 212         return seq_printf(m, "%u\n", sbi->ll_xattr_cache_enabled);
 213 }
 214
 215 static ssize_t ll_xattr_cache_seq_write(struct file *file,
 216                                         const char __user *buffer,
 217                                         size_t count, loff_t *off)
 218 {
 219         struct seq_file *m = file->private_data;
 220         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 221         int val, rc;
 222
 223         rc = lprocfs_write_helper(buffer, count, &val);
 224         if (rc)
 225                 return rc;
 226
 227         if (val != 0 && val != 1)
 228                 return -ERANGE;
 229
 230         if (val == 1 && !(sbi->ll_flags & LL_SBI_XATTR_CACHE))
 231                 return -ENOTSUPP;
 232
 233         sbi->ll_xattr_cache_enabled = val;
 234
 235         return count;
 236 }
 237 LPROC_SEQ_FOPS(ll_xattr_cache);
 238
 239 static int ll_site_stats_seq_show(struct seq_file *m, void *v)
 240 {
 241         struct super_block *sb = m->private;
 242
 243         /*
 244          * See description of statistical counters in struct cl_site, and
 245          * struct lu_site.
 246          */
 247         return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site), m);
 248 }
 249 LPROC_SEQ_FOPS_RO(ll_site_stats);
 250
 251 static int ll_max_readahead_mb_seq_show(struct seq_file *m, void *v)
 252 {
 253         struct super_block *sb = m->private;
 254         struct ll_sb_info *sbi = ll_s2sbi(sb);
 255         long pages_number;
 256         int mult;
 257
 258         spin_lock(&sbi->ll_lock);
 259         pages_number = sbi->ll_ra_info.ra_max_pages;
 260         spin_unlock(&sbi->ll_lock);
 261
 262         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 263         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 264 }
 265
 266 static ssize_t
 267 ll_max_readahead_mb_seq_write(struct file *file, const char __user *buffer,
 268                               size_t count, loff_t *off)
 269 {
 270         struct seq_file *m = file->private_data;
 271         struct super_block *sb = m->private;
 272         struct ll_sb_info *sbi = ll_s2sbi(sb);
 273         __u64 val;
 274         long pages_number;
 275         int pages_shift;
 276         int rc;
 277
 278         pages_shift = 20 - PAGE_CACHE_SHIFT;
 279         rc = lprocfs_write_frac_u64_helper(buffer, count, &val,
 280                                            1 << pages_shift);
 281         if (rc)
 282                 return rc;
 283
 284         if (val > LONG_MAX)
 285                 return -ERANGE;
 286         pages_number = (long)val;
 287
 288         if (pages_number < 0 || pages_number > totalram_pages / 2) {
 289                 /* 1/2 of RAM */
 290                 CERROR("%s: can't set max_readahead_mb=%lu > %luMB\n",
 291                        ll_get_fsname(sb, NULL, 0), pages_number >> pages_shift,
 292                        totalram_pages >> (pages_shift + 1));
 293                 return -ERANGE;
 294         }
 295
 296         spin_lock(&sbi->ll_lock);
 297         sbi->ll_ra_info.ra_max_pages = pages_number;
 298         spin_unlock(&sbi->ll_lock);
 299         return count;
 300 }
 301 LPROC_SEQ_FOPS(ll_max_readahead_mb);
 302
 303 static int ll_max_readahead_per_file_mb_seq_show(struct seq_file *m, void *v)
 304 {
 305         struct super_block *sb = m->private;
 306         struct ll_sb_info *sbi = ll_s2sbi(sb);
 307         long pages_number;
 308         int mult;
 309
 310         spin_lock(&sbi->ll_lock);
 311         pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
 312         spin_unlock(&sbi->ll_lock);
 313
 314         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 315         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 316 }
 317
 318 static ssize_t
 319 ll_max_readahead_per_file_mb_seq_write(struct file *file,
 320                                        const char __user *buffer,
 321                                        size_t count, loff_t *off)
 322 {
 323         struct seq_file *m = file->private_data;
 324         struct super_block *sb = m->private;
 325         struct ll_sb_info *sbi = ll_s2sbi(sb);
 326         int pages_shift, rc, pages_number;
 327
 328         pages_shift = 20 - PAGE_CACHE_SHIFT;
 329         rc = lprocfs_write_frac_helper(buffer, count, &pages_number,
 330                                        1 << pages_shift);
 331         if (rc)
 332                 return rc;
 333
 334         if (pages_number < 0 || pages_number > sbi->ll_ra_info.ra_max_pages) {
 335                 CERROR("%s: can't set max_readahead_per_file_mb=%u > "
 336                        "max_read_ahead_mb=%lu\n", ll_get_fsname(sb, NULL, 0),
 337                        pages_number >> pages_shift,
 338                        sbi->ll_ra_info.ra_max_pages >> pages_shift);
 339                 return -ERANGE;
 340         }
 341
 342         spin_lock(&sbi->ll_lock);
 343         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 344         spin_unlock(&sbi->ll_lock);
 345         return count;
 346 }
 347 LPROC_SEQ_FOPS(ll_max_readahead_per_file_mb);
 348
 349 static int ll_max_read_ahead_whole_mb_seq_show(struct seq_file *m, void *v)
 350 {
 351         struct super_block *sb = m->private;
 352         struct ll_sb_info *sbi = ll_s2sbi(sb);
 353         long pages_number;
 354         int mult;
 355
 356         spin_lock(&sbi->ll_lock);
 357         pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
 358         spin_unlock(&sbi->ll_lock);
 359
 360         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 361         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 362 }
 363
 364 static ssize_t
 365 ll_max_read_ahead_whole_mb_seq_write(struct file *file,
 366                                      const char __user *buffer,
 367                                      size_t count, loff_t *off)
 368 {
 369         struct seq_file *m = file->private_data;
 370         struct super_block *sb = m->private;
 371         struct ll_sb_info *sbi = ll_s2sbi(sb);
 372         int pages_shift, rc, pages_number;
 373
 374         pages_shift = 20 - PAGE_CACHE_SHIFT;
 375         rc = lprocfs_write_frac_helper(buffer, count, &pages_number,
 376                                        1 << pages_shift);
 377         if (rc)
 378                 return rc;
 379
 380         /* Cap this at the current max readahead window size, the readahead
 381          * algorithm does this anyway so it's pointless to set it larger. */
 382         if (pages_number < 0 ||
 383             pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
 384                 CERROR("%s: can't set max_read_ahead_whole_mb=%u > "
 385                        "max_read_ahead_per_file_mb=%lu\n",
 386                        ll_get_fsname(sb, NULL, 0),
 387                        pages_number >> pages_shift,
 388                        sbi->ll_ra_info.ra_max_pages_per_file >> pages_shift);
 389                 return -ERANGE;
 390         }
 391
 392         spin_lock(&sbi->ll_lock);
 393         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 394         spin_unlock(&sbi->ll_lock);
 395         return count;
 396 }
 397 LPROC_SEQ_FOPS(ll_max_read_ahead_whole_mb);
 398
 399 static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v)
 400 {
 401         struct super_block     *sb    = m->private;
 402         struct ll_sb_info      *sbi   = ll_s2sbi(sb);
 403         struct cl_client_cache *cache = sbi->ll_cache;
 404         int shift = 20 - PAGE_CACHE_SHIFT;
 405         long max_cached_mb;
 406         long unused_mb;
 407
 408         max_cached_mb = cache->ccc_lru_max >> shift;
 409         unused_mb = atomic_long_read(&cache->ccc_lru_left) >> shift;
 410         return seq_printf(m,
 411                         "users: %d\n"
 412                         "max_cached_mb: %ld\n"
 413                         "used_mb: %ld\n"
 414                         "unused_mb: %ld\n"
 415                         "reclaim_count: %u\n",
 416                         atomic_read(&cache->ccc_users),
 417                         max_cached_mb,
 418                         max_cached_mb - unused_mb,
 419                         unused_mb,
 420                         cache->ccc_lru_shrinkers);
 421 }
 422
 423 static ssize_t
 424 ll_max_cached_mb_seq_write(struct file *file, const char __user *buffer,
 425                            size_t count, loff_t *off)
 426 {
 427         struct seq_file *m = file->private_data;
 428         struct super_block *sb = m->private;
 429         struct ll_sb_info *sbi = ll_s2sbi(sb);
 430         struct cl_client_cache *cache = sbi->ll_cache;
 431         struct lu_env *env;
 432         __u64 val;
 433         long diff = 0;
 434         long nrpages = 0;
 435         long pages_number;
 436         int refcheck;
 437         int mult;
 438         long rc;
 439         char kernbuf[128];
 440         ENTRY;
 441
 442         if (count >= sizeof(kernbuf))
 443                 RETURN(-EINVAL);
 444
 445         if (copy_from_user(kernbuf, buffer, count))
 446                 RETURN(-EFAULT);
 447         kernbuf[count] = 0;
 448
 449         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 450         buffer += lprocfs_find_named_value(kernbuf, "max_cached_mb:", &count) -
 451                   kernbuf;
 452         rc = lprocfs_write_frac_u64_helper(buffer, count, &val, mult);
 453         if (rc)
 454                 RETURN(rc);
 455
 456         if (val > LONG_MAX)
 457                 return -ERANGE;
 458         pages_number = (long)val;
 459
 460         if (pages_number < 0 || pages_number > totalram_pages) {
 461                 CERROR("%s: can't set max cache more than %lu MB\n",
 462                        ll_get_fsname(sb, NULL, 0),
 463                        totalram_pages >> (20 - PAGE_CACHE_SHIFT));
 464                 RETURN(-ERANGE);
 465         }
 466         /* Allow enough cache so clients can make well-formed RPCs */
 467         pages_number = max_t(long, pages_number, PTLRPC_MAX_BRW_PAGES);
 468
 469         spin_lock(&sbi->ll_lock);
 470         diff = pages_number - cache->ccc_lru_max;
 471         spin_unlock(&sbi->ll_lock);
 472
 473         /* easy - add more LRU slots. */
 474         if (diff >= 0) {
 475                 atomic_long_add(diff, &cache->ccc_lru_left);
 476                 GOTO(out, rc = 0);
 477         }
 478
 479         env = cl_env_get(&refcheck);
 480         if (IS_ERR(env))
 481                 RETURN(rc);
 482
 483         diff = -diff;
 484         while (diff > 0) {
 485                 long tmp;
 486
 487                 /* reduce LRU budget from free slots. */
 488                 do {
 489                         long ov, nv;
 490
 491                         ov = atomic_long_read(&cache->ccc_lru_left);
 492                         if (ov == 0)
 493                                 break;
 494
 495                         nv = ov > diff ? ov - diff : 0;
 496                         rc = atomic_long_cmpxchg(&cache->ccc_lru_left, ov, nv);
 497                         if (likely(ov == rc)) {
 498                                 diff -= ov - nv;
 499                                 nrpages += ov - nv;
 500                                 break;
 501                         }
 502                 } while (1);
 503
 504                 if (diff <= 0)
 505                         break;
 506
 507                 if (sbi->ll_dt_exp == NULL) { /* being initialized */
 508                         rc = -ENODEV;
 509                         break;
 510                 }
 511
 512                 /* difficult - have to ask OSCs to drop LRU slots. */
 513                 tmp = diff << 1;
 514                 rc = obd_set_info_async(env, sbi->ll_dt_exp,
 515                                 sizeof(KEY_CACHE_LRU_SHRINK),
 516                                 KEY_CACHE_LRU_SHRINK,
 517                                 sizeof(tmp), &tmp, NULL);
 518                 if (rc < 0)
 519                         break;
 520         }
 521         cl_env_put(env, &refcheck);
 522
 523 out:
 524         if (rc >= 0) {
 525                 spin_lock(&sbi->ll_lock);
 526                 cache->ccc_lru_max = pages_number;
 527                 spin_unlock(&sbi->ll_lock);
 528                 rc = count;
 529         } else {
 530                 atomic_long_add(nrpages, &cache->ccc_lru_left);
 531         }
 532         return rc;
 533 }
 534 LPROC_SEQ_FOPS(ll_max_cached_mb);
 535
 536 static int ll_checksum_seq_show(struct seq_file *m, void *v)
 537 {
 538         struct super_block *sb = m->private;
 539         struct ll_sb_info *sbi = ll_s2sbi(sb);
 540
 541         return seq_printf(m, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 542 }
 543
 544 static ssize_t ll_checksum_seq_write(struct file *file,
 545                                      const char __user *buffer,
 546                                      size_t count, loff_t *off)
 547 {
 548         struct seq_file *m = file->private_data;
 549         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 550         int val, rc;
 551
 552         if (!sbi->ll_dt_exp)
 553                 /* Not set up yet */
 554                 return -EAGAIN;
 555
 556         rc = lprocfs_write_helper(buffer, count, &val);
 557         if (rc)
 558                 return rc;
 559         if (val)
 560                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 561         else
 562                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 563
 564         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 565                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 566         if (rc)
 567                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 568
 569         return count;
 570 }
 571 LPROC_SEQ_FOPS(ll_checksum);
 572
 573 static int ll_rd_track_id(struct seq_file *m, enum stats_track_type type)
 574 {
 575         struct super_block *sb = m->private;
 576
 577         if (ll_s2sbi(sb)->ll_stats_track_type == type) {
 578                 return seq_printf(m, "%d\n",
 579                                   ll_s2sbi(sb)->ll_stats_track_id);
 580         } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
 581                 return seq_printf(m, "0 (all)\n");
 582         } else {
 583                 return seq_printf(m, "untracked\n");
 584         }
 585 }
 586
 587 static int ll_wr_track_id(const char __user *buffer, unsigned long count,
 588                           void *data, enum stats_track_type type)
 589 {
 590         struct super_block *sb = data;
 591         int rc, pid;
 592
 593         rc = lprocfs_write_helper(buffer, count, &pid);
 594         if (rc)
 595                 return rc;
 596         ll_s2sbi(sb)->ll_stats_track_id = pid;
 597         if (pid == 0)
 598                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 599         else
 600                 ll_s2sbi(sb)->ll_stats_track_type = type;
 601         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 602         return count;
 603 }
 604
 605 static int ll_track_pid_seq_show(struct seq_file *m, void *v)
 606 {
 607         return ll_rd_track_id(m, STATS_TRACK_PID);
 608 }
 609
 610 static ssize_t ll_track_pid_seq_write(struct file *file,
 611                                       const char __user *buffer,
 612                                       size_t count, loff_t *off)
 613 {
 614         struct seq_file *seq = file->private_data;
 615         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PID);
 616 }
 617 LPROC_SEQ_FOPS(ll_track_pid);
 618
 619 static int ll_track_ppid_seq_show(struct seq_file *m, void *v)
 620 {
 621         return ll_rd_track_id(m, STATS_TRACK_PPID);
 622 }
 623
 624 static ssize_t ll_track_ppid_seq_write(struct file *file,
 625                                        const char __user *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_PPID);
 630 }
 631 LPROC_SEQ_FOPS(ll_track_ppid);
 632
 633 static int ll_track_gid_seq_show(struct seq_file *m, void *v)
 634 {
 635         return ll_rd_track_id(m, STATS_TRACK_GID);
 636 }
 637
 638 static ssize_t ll_track_gid_seq_write(struct file *file,
 639                                       const char __user *buffer,
 640                                       size_t count, loff_t *off)
 641 {
 642         struct seq_file *seq = file->private_data;
 643         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_GID);
 644 }
 645 LPROC_SEQ_FOPS(ll_track_gid);
 646
 647 static int ll_statahead_max_seq_show(struct seq_file *m, void *v)
 648 {
 649         struct super_block *sb = m->private;
 650         struct ll_sb_info *sbi = ll_s2sbi(sb);
 651
 652         return seq_printf(m, "%u\n", sbi->ll_sa_max);
 653 }
 654
 655 static ssize_t ll_statahead_max_seq_write(struct file *file,
 656                                           const char __user *buffer,
 657                                           size_t count, loff_t *off)
 658 {
 659         struct seq_file *m = file->private_data;
 660         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 661         int val, rc;
 662
 663         rc = lprocfs_write_helper(buffer, count, &val);
 664         if (rc)
 665                 return rc;
 666
 667         if (val >= 0 && val <= LL_SA_RPC_MAX)
 668                 sbi->ll_sa_max = val;
 669         else
 670                 CERROR("Bad statahead_max value %d. Valid values are in the "
 671                        "range [0, %d]\n", val, LL_SA_RPC_MAX);
 672
 673         return count;
 674 }
 675 LPROC_SEQ_FOPS(ll_statahead_max);
 676
 677 static int ll_statahead_agl_seq_show(struct seq_file *m, void *v)
 678 {
 679         struct super_block *sb = m->private;
 680         struct ll_sb_info *sbi = ll_s2sbi(sb);
 681
 682         return seq_printf(m, "%u\n",
 683                           sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
 684 }
 685
 686 static ssize_t ll_statahead_agl_seq_write(struct file *file,
 687                                           const char __user *buffer,
 688                                           size_t count, loff_t *off)
 689 {
 690         struct seq_file *m = file->private_data;
 691         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 692         int val, rc;
 693
 694         rc = lprocfs_write_helper(buffer, count, &val);
 695         if (rc)
 696                 return rc;
 697
 698         if (val)
 699                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 700         else
 701                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
 702
 703         return count;
 704 }
 705 LPROC_SEQ_FOPS(ll_statahead_agl);
 706
 707 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
 708 {
 709         struct super_block *sb = m->private;
 710         struct ll_sb_info *sbi = ll_s2sbi(sb);
 711
 712         return seq_printf(m,
 713                         "statahead total: %u\n"
 714                         "statahead wrong: %u\n"
 715                         "agl total: %u\n",
 716                         atomic_read(&sbi->ll_sa_total),
 717                         atomic_read(&sbi->ll_sa_wrong),
 718                         atomic_read(&sbi->ll_agl_total));
 719 }
 720 LPROC_SEQ_FOPS_RO(ll_statahead_stats);
 721
 722 static int ll_lazystatfs_seq_show(struct seq_file *m, void *v)
 723 {
 724         struct super_block *sb = m->private;
 725         struct ll_sb_info *sbi = ll_s2sbi(sb);
 726
 727         return seq_printf(m, "%u\n",
 728                           (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 729 }
 730
 731 static ssize_t ll_lazystatfs_seq_write(struct file *file,
 732                                        const char __user *buffer,
 733                                         size_t count, loff_t *off)
 734 {
 735         struct seq_file *m = file->private_data;
 736         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 737         int val, rc;
 738
 739         rc = lprocfs_write_helper(buffer, count, &val);
 740         if (rc)
 741                 return rc;
 742
 743         if (val)
 744                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 745         else
 746                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 747
 748         return count;
 749 }
 750 LPROC_SEQ_FOPS(ll_lazystatfs);
 751
 752 static int ll_max_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_max_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_max_easize);
 766
 767 /**
 768  * Get default_easize.
 769  *
 770  * \see client_obd::cl_default_mds_easize
 771  *
 772  * \param[in] m         seq_file handle
 773  * \param[in] v         unused for single entry
 774  *
 775  * \retval 0            on success
 776  * \retval negative     negated errno on failure
 777  */
 778 static int ll_default_easize_seq_show(struct seq_file *m, void *v)
 779 {
 780         struct super_block *sb = m->private;
 781         struct ll_sb_info *sbi = ll_s2sbi(sb);
 782         unsigned int ealen;
 783         int rc;
 784
 785         rc = ll_get_default_mdsize(sbi, &ealen);
 786         if (rc)
 787                 return rc;
 788
 789         return seq_printf(m, "%u\n", ealen);
 790 }
 791
 792 /**
 793  * Set default_easize.
 794  *
 795  * Range checking on the passed value is handled by
 796  * ll_set_default_mdsize().
 797  *
 798  * \see client_obd::cl_default_mds_easize
 799  *
 800  * \param[in] file      proc file
 801  * \param[in] buffer    string passed from user space
 802  * \param[in] count     \a buffer length
 803  * \param[in] off       unused for single entry
 804  *
 805  * \retval positive     \a count on success
 806  * \retval negative     negated errno on failure
 807  */
 808 static ssize_t ll_default_easize_seq_write(struct file *file,
 809                                            const char __user *buffer,
 810                                            size_t count, loff_t *unused)
 811 {
 812         struct seq_file         *seq = file->private_data;
 813         struct super_block      *sb = (struct super_block *)seq->private;
 814         struct ll_sb_info       *sbi = ll_s2sbi(sb);
 815         int                      val;
 816         int                      rc;
 817
 818         if (count == 0)
 819                 return 0;
 820
 821         rc = lprocfs_write_helper(buffer, count, &val);
 822         if (rc < 0)
 823                 return rc;
 824
 825         rc = ll_set_default_mdsize(sbi, val);
 826         if (rc)
 827                 return rc;
 828
 829         return count;
 830 }
 831 LPROC_SEQ_FOPS(ll_default_easize);
 832
 833 static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
 834 {
 835         const char *str[] = LL_SBI_FLAGS;
 836         struct super_block *sb = m->private;
 837         int flags = ll_s2sbi(sb)->ll_flags;
 838         int i = 0;
 839
 840         while (flags != 0) {
 841                 if (ARRAY_SIZE(str) <= i) {
 842                         CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
 843                                 "flags please.\n", ll_get_fsname(sb, NULL, 0));
 844                         return -EINVAL;
 845                 }
 846
 847                 if (flags & 0x1)
 848                         seq_printf(m, "%s ", str[i]);
 849                 flags >>= 1;
 850                 ++i;
 851         }
 852         seq_printf(m, "\b\n");
 853         return 0;
 854 }
 855 LPROC_SEQ_FOPS_RO(ll_sbi_flags);
 856
 857 static int ll_unstable_stats_seq_show(struct seq_file *m, void *v)
 858 {
 859         struct super_block      *sb    = m->private;
 860         struct ll_sb_info       *sbi   = ll_s2sbi(sb);
 861         struct cl_client_cache  *cache = sbi->ll_cache;
 862         long pages;
 863         int mb;
 864
 865         pages = atomic_long_read(&cache->ccc_unstable_nr);
 866         mb    = (pages * PAGE_CACHE_SIZE) >> 20;
 867
 868         return seq_printf(m, "unstable_check:     %8d\n"
 869                              "unstable_pages: %12ld\n"
 870                              "unstable_mb:        %8d\n",
 871                           cache->ccc_unstable_check, pages, mb);
 872 }
 873
 874 static ssize_t ll_unstable_stats_seq_write(struct file *file,
 875                                            const char __user *buffer,
 876                                            size_t count, loff_t *unused)
 877 {
 878         struct seq_file *seq = file->private_data;
 879         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)seq->private);
 880         char kernbuf[128];
 881         int val, rc;
 882
 883         if (count == 0)
 884                 return 0;
 885         if (count >= sizeof(kernbuf))
 886                 return -EINVAL;
 887
 888         if (copy_from_user(kernbuf, buffer, count))
 889                 return -EFAULT;
 890         kernbuf[count] = 0;
 891
 892         buffer += lprocfs_find_named_value(kernbuf, "unstable_check:", &count) -
 893                   kernbuf;
 894         rc = lprocfs_write_helper(buffer, count, &val);
 895         if (rc < 0)
 896                 return rc;
 897
 898         /* borrow lru lock to set the value */
 899         spin_lock(&sbi->ll_cache->ccc_lru_lock);
 900         sbi->ll_cache->ccc_unstable_check = !!val;
 901         spin_unlock(&sbi->ll_cache->ccc_lru_lock);
 902
 903         return count;
 904 }
 905 LPROC_SEQ_FOPS(ll_unstable_stats);
 906
 907 static int ll_root_squash_seq_show(struct seq_file *m, void *v)
 908 {
 909         struct super_block *sb = m->private;
 910         struct ll_sb_info *sbi = ll_s2sbi(sb);
 911         struct root_squash_info *squash = &sbi->ll_squash;
 912
 913         return seq_printf(m, "%u:%u\n", squash->rsi_uid, squash->rsi_gid);
 914 }
 915
 916 static ssize_t ll_root_squash_seq_write(struct file *file,
 917                                         const char __user *buffer,
 918                                         size_t count, loff_t *off)
 919 {
 920         struct seq_file *m = file->private_data;
 921         struct super_block *sb = m->private;
 922         struct ll_sb_info *sbi = ll_s2sbi(sb);
 923         struct root_squash_info *squash = &sbi->ll_squash;
 924
 925         return lprocfs_wr_root_squash(buffer, count, squash,
 926                                       ll_get_fsname(sb, NULL, 0));
 927 }
 928 LPROC_SEQ_FOPS(ll_root_squash);
 929
 930 static int ll_nosquash_nids_seq_show(struct seq_file *m, void *v)
 931 {
 932         struct super_block *sb = m->private;
 933         struct ll_sb_info *sbi = ll_s2sbi(sb);
 934         struct root_squash_info *squash = &sbi->ll_squash;
 935         int len, rc;
 936
 937         down_read(&squash->rsi_sem);
 938         if (!list_empty(&squash->rsi_nosquash_nids)) {
 939                 len = cfs_print_nidlist(m->buf + m->count, m->size - m->count,
 940                                         &squash->rsi_nosquash_nids);
 941                 m->count += len;
 942                 rc = seq_printf(m, "\n");
 943         } else {
 944                 rc = seq_printf(m, "NONE\n");
 945         }
 946         up_read(&squash->rsi_sem);
 947
 948         return rc;
 949 }
 950
 951 static ssize_t ll_nosquash_nids_seq_write(struct file *file,
 952                                           const char __user *buffer,
 953                                           size_t count, loff_t *off)
 954 {
 955         struct seq_file *m = file->private_data;
 956         struct super_block *sb = m->private;
 957         struct ll_sb_info *sbi = ll_s2sbi(sb);
 958         struct root_squash_info *squash = &sbi->ll_squash;
 959         int rc;
 960
 961         rc = lprocfs_wr_nosquash_nids(buffer, count, squash,
 962                                       ll_get_fsname(sb, NULL, 0));
 963         if (rc < 0)
 964                 return rc;
 965
 966         ll_compute_rootsquash_state(sbi);
 967
 968         return rc;
 969 }
 970 LPROC_SEQ_FOPS(ll_nosquash_nids);
 971
 972 struct lprocfs_vars lprocfs_llite_obd_vars[] = {
 973         { .name =       "uuid",
 974           .fops =       &ll_sb_uuid_fops                        },
 975         { .name =       "fstype",
 976           .fops =       &ll_fstype_fops                         },
 977         { .name =       "site",
 978           .fops =       &ll_site_stats_fops                     },
 979         { .name =       "blocksize",
 980           .fops =       &ll_blksize_fops                        },
 981         { .name =       "kbytestotal",
 982           .fops =       &ll_kbytestotal_fops                    },
 983         { .name =       "kbytesfree",
 984           .fops =       &ll_kbytesfree_fops                     },
 985         { .name =       "kbytesavail",
 986           .fops =       &ll_kbytesavail_fops                    },
 987         { .name =       "filestotal",
 988           .fops =       &ll_filestotal_fops                     },
 989         { .name =       "filesfree",
 990           .fops =       &ll_filesfree_fops                      },
 991         { .name =       "client_type",
 992           .fops =       &ll_client_type_fops                    },
 993         { .name =       "max_read_ahead_mb",
 994           .fops =       &ll_max_readahead_mb_fops               },
 995         { .name =       "max_read_ahead_per_file_mb",
 996           .fops =       &ll_max_readahead_per_file_mb_fops      },
 997         { .name =       "max_read_ahead_whole_mb",
 998           .fops =       &ll_max_read_ahead_whole_mb_fops        },
 999         { .name =       "max_cached_mb",
1000           .fops =       &ll_max_cached_mb_fops                  },
1001         { .name =       "checksum_pages",
1002           .fops =       &ll_checksum_fops                       },
1003         { .name =       "stats_track_pid",
1004           .fops =       &ll_track_pid_fops                      },
1005         { .name =       "stats_track_ppid",
1006           .fops =       &ll_track_ppid_fops                     },
1007         { .name =       "stats_track_gid",
1008           .fops =       &ll_track_gid_fops                      },
1009         { .name =       "statahead_max",
1010           .fops =       &ll_statahead_max_fops                  },
1011         { .name =       "statahead_agl",
1012           .fops =       &ll_statahead_agl_fops                  },
1013         { .name =       "statahead_stats",
1014           .fops =       &ll_statahead_stats_fops                },
1015         { .name =       "lazystatfs",
1016           .fops =       &ll_lazystatfs_fops                     },
1017         { .name =       "max_easize",
1018           .fops =       &ll_max_easize_fops                     },
1019         { .name =       "default_easize",
1020           .fops =       &ll_default_easize_fops                 },
1021         { .name =       "sbi_flags",
1022           .fops =       &ll_sbi_flags_fops                      },
1023         { .name =       "xattr_cache",
1024           .fops =       &ll_xattr_cache_fops                    },
1025         { .name =       "unstable_stats",
1026           .fops =       &ll_unstable_stats_fops                 },
1027         { .name =       "root_squash",
1028           .fops =       &ll_root_squash_fops                    },
1029         { .name =       "nosquash_nids",
1030           .fops =       &ll_nosquash_nids_fops                  },
1031         { NULL }
1032 };
1033
1034 #define MAX_STRING_SIZE 128
1035
1036 static const struct llite_file_opcode {
1037         __u32       opcode;
1038         __u32       type;
1039         const char *opname;
1040 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
1041         /* file operation */
1042         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
1043         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
1044         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
1045                                    "read_bytes" },
1046         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
1047                                    "write_bytes" },
1048         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
1049                                    "brw_read" },
1050         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
1051                                    "brw_write" },
1052         { LPROC_LL_OSC_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
1053                                    "osc_read" },
1054         { LPROC_LL_OSC_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
1055                                    "osc_write" },
1056         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
1057         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
1058         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
1059         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
1060         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
1061         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
1062         { LPROC_LL_READDIR,        LPROCFS_TYPE_REGS, "readdir" },
1063         /* inode operation */
1064         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
1065         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "truncate" },
1066         { LPROC_LL_FLOCK,          LPROCFS_TYPE_REGS, "flock" },
1067         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
1068         /* dir inode operation */
1069         { LPROC_LL_CREATE,         LPROCFS_TYPE_REGS, "create" },
1070         { LPROC_LL_LINK,           LPROCFS_TYPE_REGS, "link" },
1071         { LPROC_LL_UNLINK,         LPROCFS_TYPE_REGS, "unlink" },
1072         { LPROC_LL_SYMLINK,        LPROCFS_TYPE_REGS, "symlink" },
1073         { LPROC_LL_MKDIR,          LPROCFS_TYPE_REGS, "mkdir" },
1074         { LPROC_LL_RMDIR,          LPROCFS_TYPE_REGS, "rmdir" },
1075         { LPROC_LL_MKNOD,          LPROCFS_TYPE_REGS, "mknod" },
1076         { LPROC_LL_RENAME,         LPROCFS_TYPE_REGS, "rename" },
1077         /* special inode operation */
1078         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
1079         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
1080         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
1081         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
1082         { LPROC_LL_GETXATTR_HITS,  LPROCFS_TYPE_REGS, "getxattr_hits" },
1083         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
1084         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
1085         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
1086 };
1087
1088 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
1089 {
1090         if (!sbi->ll_stats)
1091                 return;
1092         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
1093                 lprocfs_counter_add(sbi->ll_stats, op, count);
1094         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
1095                  sbi->ll_stats_track_id == current->pid)
1096                 lprocfs_counter_add(sbi->ll_stats, op, count);
1097         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
1098                  sbi->ll_stats_track_id == current->parent->pid)
1099                 lprocfs_counter_add(sbi->ll_stats, op, count);
1100         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
1101                  sbi->ll_stats_track_id ==
1102                         from_kgid(&init_user_ns, current_gid()))
1103                 lprocfs_counter_add(sbi->ll_stats, op, count);
1104 }
1105 EXPORT_SYMBOL(ll_stats_ops_tally);
1106
1107 static const char *ra_stat_string[] = {
1108         [RA_STAT_HIT] = "hits",
1109         [RA_STAT_MISS] = "misses",
1110         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
1111         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
1112         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
1113         [RA_STAT_FAILED_MATCH] = "failed lock match",
1114         [RA_STAT_DISCARDED] = "read but discarded",
1115         [RA_STAT_ZERO_LEN] = "zero length file",
1116         [RA_STAT_ZERO_WINDOW] = "zero size window",
1117         [RA_STAT_EOF] = "read-ahead to EOF",
1118         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
1119         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
1120         [RA_STAT_FAILED_REACH_END] = "failed to reach end"
1121 };
1122
1123 LPROC_SEQ_FOPS_RO_TYPE(llite, name);
1124 LPROC_SEQ_FOPS_RO_TYPE(llite, uuid);
1125
1126 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
1127                                 struct super_block *sb, char *osc, char *mdc)
1128 {
1129         struct lprocfs_vars lvars[2];
1130         struct lustre_sb_info *lsi = s2lsi(sb);
1131         struct ll_sb_info *sbi = ll_s2sbi(sb);
1132         struct obd_device *obd;
1133         struct proc_dir_entry *dir;
1134         char name[MAX_STRING_SIZE + 1], *ptr;
1135         int err, id, len, rc;
1136         ENTRY;
1137
1138         memset(lvars, 0, sizeof(lvars));
1139
1140         name[MAX_STRING_SIZE] = '\0';
1141         lvars[0].name = name;
1142
1143         LASSERT(sbi != NULL);
1144         LASSERT(mdc != NULL);
1145         LASSERT(osc != NULL);
1146
1147         /* Get fsname */
1148         len = strlen(lsi->lsi_lmd->lmd_profile);
1149         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
1150         if (ptr && (strcmp(ptr, "-client") == 0))
1151                 len -= 7;
1152
1153         /* Mount info */
1154         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
1155                  lsi->lsi_lmd->lmd_profile, sb);
1156
1157         sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
1158         if (IS_ERR(sbi->ll_proc_root)) {
1159                 err = PTR_ERR(sbi->ll_proc_root);
1160                 sbi->ll_proc_root = NULL;
1161                 RETURN(err);
1162         }
1163
1164         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
1165                                 &vvp_dump_pgcache_file_ops, sbi);
1166         if (rc)
1167                 CWARN("Error adding the dump_page_cache file\n");
1168
1169         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
1170                                 &ll_rw_extents_stats_fops, sbi);
1171         if (rc)
1172                 CWARN("Error adding the extent_stats file\n");
1173
1174         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
1175                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
1176         if (rc)
1177                 CWARN("Error adding the extents_stats_per_process file\n");
1178
1179         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
1180                                 &ll_rw_offset_stats_fops, sbi);
1181         if (rc)
1182                 CWARN("Error adding the offset_stats file\n");
1183
1184         /* File operations stats */
1185         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
1186                                             LPROCFS_STATS_FLAG_NONE);
1187         if (sbi->ll_stats == NULL)
1188                 GOTO(out, err = -ENOMEM);
1189         /* do counter init */
1190         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
1191                 __u32 type = llite_opcode_table[id].type;
1192                 void *ptr = NULL;
1193                 if (type & LPROCFS_TYPE_REGS)
1194                         ptr = "regs";
1195                 else if (type & LPROCFS_TYPE_BYTES)
1196                         ptr = "bytes";
1197                 else if (type & LPROCFS_TYPE_PAGES)
1198                         ptr = "pages";
1199                 lprocfs_counter_init(sbi->ll_stats,
1200                                      llite_opcode_table[id].opcode,
1201                                      (type & LPROCFS_CNTR_AVGMINMAX),
1202                                      llite_opcode_table[id].opname, ptr);
1203         }
1204         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
1205         if (err)
1206                 GOTO(out, err);
1207
1208         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1209                                                LPROCFS_STATS_FLAG_NONE);
1210         if (sbi->ll_ra_stats == NULL)
1211                 GOTO(out, err = -ENOMEM);
1212
1213         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1214                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
1215                                      ra_stat_string[id], "pages");
1216         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
1217                                      sbi->ll_ra_stats);
1218         if (err)
1219                 GOTO(out, err);
1220
1221
1222         err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
1223         if (err)
1224                 GOTO(out, err);
1225
1226         /* MDC info */
1227         obd = class_name2obd(mdc);
1228
1229         LASSERT(obd != NULL);
1230         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1231         LASSERT(obd->obd_type->typ_name != NULL);
1232
1233         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1234         if (dir == NULL)
1235                 GOTO(out, err = -ENOMEM);
1236
1237         snprintf(name, MAX_STRING_SIZE, "common_name");
1238         lvars[0].fops = &llite_name_fops;
1239         err = lprocfs_add_vars(dir, lvars, obd);
1240         if (err)
1241                 GOTO(out, err);
1242
1243         snprintf(name, MAX_STRING_SIZE, "uuid");
1244         lvars[0].fops = &llite_uuid_fops;
1245         err = lprocfs_add_vars(dir, lvars, obd);
1246         if (err)
1247                 GOTO(out, err);
1248
1249         /* OSC */
1250         obd = class_name2obd(osc);
1251
1252         LASSERT(obd != NULL);
1253         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1254         LASSERT(obd->obd_type->typ_name != NULL);
1255
1256         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1257         if (dir == NULL)
1258                 GOTO(out, err = -ENOMEM);
1259
1260         snprintf(name, MAX_STRING_SIZE, "common_name");
1261         lvars[0].fops = &llite_name_fops;
1262         err = lprocfs_add_vars(dir, lvars, obd);
1263         if (err)
1264                 GOTO(out, err);
1265
1266         snprintf(name, MAX_STRING_SIZE, "uuid");
1267         lvars[0].fops = &llite_uuid_fops;
1268         err = lprocfs_add_vars(dir, lvars, obd);
1269 out:
1270         if (err) {
1271                 lprocfs_remove(&sbi->ll_proc_root);
1272                 lprocfs_free_stats(&sbi->ll_ra_stats);
1273                 lprocfs_free_stats(&sbi->ll_stats);
1274         }
1275         RETURN(err);
1276 }
1277
1278 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
1279 {
1280         if (sbi->ll_proc_root) {
1281                 lprocfs_remove(&sbi->ll_proc_root);
1282                 lprocfs_free_stats(&sbi->ll_ra_stats);
1283                 lprocfs_free_stats(&sbi->ll_stats);
1284         }
1285 }
1286 #undef MAX_STRING_SIZE
1287
1288 #define pct(a,b) (b ? a * 100 / b : 0)
1289
1290 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1291                                    struct seq_file *seq, int which)
1292 {
1293         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1294         unsigned long start, end, r, w;
1295         char *unitp = "KMGTPEZY";
1296         int i, units = 10;
1297         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1298
1299         read_cum = 0;
1300         write_cum = 0;
1301         start = 0;
1302
1303         for(i = 0; i < LL_HIST_MAX; i++) {
1304                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1305                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1306         }
1307
1308         for(i = 0; i < LL_HIST_MAX; i++) {
1309                 r = pp_info->pp_r_hist.oh_buckets[i];
1310                 w = pp_info->pp_w_hist.oh_buckets[i];
1311                 read_cum += r;
1312                 write_cum += w;
1313                 end = 1 << (i + LL_HIST_START - units);
1314                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
1315                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
1316                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1317                            r, pct(r, read_tot), pct(read_cum, read_tot),
1318                            w, pct(w, write_tot), pct(write_cum, write_tot));
1319                 start = end;
1320                 if (start == 1<<10) {
1321                         start = 1;
1322                         units += 10;
1323                         unitp++;
1324                 }
1325                 if (read_cum == read_tot && write_cum == write_tot)
1326                         break;
1327         }
1328 }
1329
1330 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1331 {
1332         struct timeval now;
1333         struct ll_sb_info *sbi = seq->private;
1334         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1335         int k;
1336
1337         do_gettimeofday(&now);
1338
1339         if (!sbi->ll_rw_stats_on) {
1340                 seq_printf(seq, "disabled\n"
1341                                 "write anything in this file to activate, "
1342                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1343                 return 0;
1344         }
1345         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1346                    now.tv_sec, now.tv_usec);
1347         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1348         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1349                    "extents", "calls", "%", "cum%",
1350                    "calls", "%", "cum%");
1351         spin_lock(&sbi->ll_pp_extent_lock);
1352         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1353                 if (io_extents->pp_extents[k].pid != 0) {
1354                         seq_printf(seq, "\nPID: %d\n",
1355                                    io_extents->pp_extents[k].pid);
1356                         ll_display_extents_info(io_extents, seq, k);
1357                 }
1358         }
1359         spin_unlock(&sbi->ll_pp_extent_lock);
1360         return 0;
1361 }
1362
1363 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1364                                                 const char __user *buf,
1365                                                 size_t len,
1366                                                 loff_t *off)
1367 {
1368         struct seq_file *seq = file->private_data;
1369         struct ll_sb_info *sbi = seq->private;
1370         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1371         int i;
1372         int value = 1, rc = 0;
1373
1374         if (len == 0)
1375                 return -EINVAL;
1376
1377         rc = lprocfs_write_helper(buf, len, &value);
1378         if (rc < 0 && len < 16) {
1379                 char kernbuf[16];
1380
1381                 if (copy_from_user(kernbuf, buf, len))
1382                         return -EFAULT;
1383                 kernbuf[len] = 0;
1384
1385                 if (kernbuf[len - 1] == '\n')
1386                         kernbuf[len - 1] = 0;
1387
1388                 if (strcmp(kernbuf, "disabled") == 0 ||
1389                     strcmp(kernbuf, "Disabled") == 0)
1390                         value = 0;
1391         }
1392
1393         if (value == 0)
1394                 sbi->ll_rw_stats_on = 0;
1395         else
1396                 sbi->ll_rw_stats_on = 1;
1397
1398         spin_lock(&sbi->ll_pp_extent_lock);
1399         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1400                 io_extents->pp_extents[i].pid = 0;
1401                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1402                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1403         }
1404         spin_unlock(&sbi->ll_pp_extent_lock);
1405         return len;
1406 }
1407
1408 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1409
1410 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1411 {
1412         struct timeval now;
1413         struct ll_sb_info *sbi = seq->private;
1414         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1415
1416         do_gettimeofday(&now);
1417
1418         if (!sbi->ll_rw_stats_on) {
1419                 seq_printf(seq, "disabled\n"
1420                                 "write anything in this file to activate, "
1421                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1422                 return 0;
1423         }
1424         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1425                    now.tv_sec, now.tv_usec);
1426
1427         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1428         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1429                    "extents", "calls", "%", "cum%",
1430                    "calls", "%", "cum%");
1431         spin_lock(&sbi->ll_lock);
1432         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1433         spin_unlock(&sbi->ll_lock);
1434
1435         return 0;
1436 }
1437
1438 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
1439                                              const char __user *buf,
1440                                              size_t len, loff_t *off)
1441 {
1442         struct seq_file *seq = file->private_data;
1443         struct ll_sb_info *sbi = seq->private;
1444         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1445         int i;
1446         int value = 1, rc = 0;
1447
1448         if (len == 0)
1449                 return -EINVAL;
1450
1451         rc = lprocfs_write_helper(buf, len, &value);
1452         if (rc < 0 && len < 16) {
1453                 char kernbuf[16];
1454
1455                 if (copy_from_user(kernbuf, buf, len))
1456                         return -EFAULT;
1457                 kernbuf[len] = 0;
1458
1459                 if (kernbuf[len - 1] == '\n')
1460                         kernbuf[len - 1] = 0;
1461
1462                 if (strcmp(kernbuf, "disabled") == 0 ||
1463                     strcmp(kernbuf, "Disabled") == 0)
1464                         value = 0;
1465         }
1466
1467         if (value == 0)
1468                 sbi->ll_rw_stats_on = 0;
1469         else
1470                 sbi->ll_rw_stats_on = 1;
1471
1472         spin_lock(&sbi->ll_pp_extent_lock);
1473         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1474                 io_extents->pp_extents[i].pid = 0;
1475                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1476                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1477         }
1478         spin_unlock(&sbi->ll_pp_extent_lock);
1479
1480         return len;
1481 }
1482 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1483
1484 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1485                        struct ll_file_data *file, loff_t pos,
1486                        size_t count, int rw)
1487 {
1488         int i, cur = -1;
1489         struct ll_rw_process_info *process;
1490         struct ll_rw_process_info *offset;
1491         int *off_count = &sbi->ll_rw_offset_entry_count;
1492         int *process_count = &sbi->ll_offset_process_count;
1493         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1494
1495         if(!sbi->ll_rw_stats_on)
1496                 return;
1497         process = sbi->ll_rw_process_info;
1498         offset = sbi->ll_rw_offset_info;
1499
1500         spin_lock(&sbi->ll_pp_extent_lock);
1501         /* Extent statistics */
1502         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1503                 if(io_extents->pp_extents[i].pid == pid) {
1504                         cur = i;
1505                         break;
1506                 }
1507         }
1508
1509         if (cur == -1) {
1510                 /* new process */
1511                 sbi->ll_extent_process_count =
1512                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1513                 cur = sbi->ll_extent_process_count;
1514                 io_extents->pp_extents[cur].pid = pid;
1515                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1516                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1517         }
1518
1519         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1520              (i < (LL_HIST_MAX - 1)); i++);
1521         if (rw == 0) {
1522                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1523                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1524         } else {
1525                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1526                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1527         }
1528         spin_unlock(&sbi->ll_pp_extent_lock);
1529
1530         spin_lock(&sbi->ll_process_lock);
1531         /* Offset statistics */
1532         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1533                 if (process[i].rw_pid == pid) {
1534                         if (process[i].rw_last_file != file) {
1535                                 process[i].rw_range_start = pos;
1536                                 process[i].rw_last_file_pos = pos + count;
1537                                 process[i].rw_smallest_extent = count;
1538                                 process[i].rw_largest_extent = count;
1539                                 process[i].rw_offset = 0;
1540                                 process[i].rw_last_file = file;
1541                                 spin_unlock(&sbi->ll_process_lock);
1542                                 return;
1543                         }
1544                         if (process[i].rw_last_file_pos != pos) {
1545                                 *off_count =
1546                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1547                                 offset[*off_count].rw_op = process[i].rw_op;
1548                                 offset[*off_count].rw_pid = pid;
1549                                 offset[*off_count].rw_range_start =
1550                                         process[i].rw_range_start;
1551                                 offset[*off_count].rw_range_end =
1552                                         process[i].rw_last_file_pos;
1553                                 offset[*off_count].rw_smallest_extent =
1554                                         process[i].rw_smallest_extent;
1555                                 offset[*off_count].rw_largest_extent =
1556                                         process[i].rw_largest_extent;
1557                                 offset[*off_count].rw_offset =
1558                                         process[i].rw_offset;
1559                                 process[i].rw_op = rw;
1560                                 process[i].rw_range_start = pos;
1561                                 process[i].rw_smallest_extent = count;
1562                                 process[i].rw_largest_extent = count;
1563                                 process[i].rw_offset = pos -
1564                                         process[i].rw_last_file_pos;
1565                         }
1566                         if(process[i].rw_smallest_extent > count)
1567                                 process[i].rw_smallest_extent = count;
1568                         if(process[i].rw_largest_extent < count)
1569                                 process[i].rw_largest_extent = count;
1570                         process[i].rw_last_file_pos = pos + count;
1571                         spin_unlock(&sbi->ll_process_lock);
1572                         return;
1573                 }
1574         }
1575         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1576         process[*process_count].rw_pid = pid;
1577         process[*process_count].rw_op = rw;
1578         process[*process_count].rw_range_start = pos;
1579         process[*process_count].rw_last_file_pos = pos + count;
1580         process[*process_count].rw_smallest_extent = count;
1581         process[*process_count].rw_largest_extent = count;
1582         process[*process_count].rw_offset = 0;
1583         process[*process_count].rw_last_file = file;
1584         spin_unlock(&sbi->ll_process_lock);
1585 }
1586
1587 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1588 {
1589         struct timeval now;
1590         struct ll_sb_info *sbi = seq->private;
1591         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1592         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1593         int i;
1594
1595         do_gettimeofday(&now);
1596
1597         if (!sbi->ll_rw_stats_on) {
1598                 seq_printf(seq, "disabled\n"
1599                                 "write anything in this file to activate, "
1600                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1601                 return 0;
1602         }
1603         spin_lock(&sbi->ll_process_lock);
1604
1605         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1606                    now.tv_sec, now.tv_usec);
1607         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1608                    "R/W", "PID", "RANGE START", "RANGE END",
1609                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1610
1611         /* We stored the discontiguous offsets here; print them first */
1612         for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1613                 if (offset[i].rw_pid != 0)
1614                         seq_printf(seq,
1615                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1616                                    offset[i].rw_op == READ ? 'R' : 'W',
1617                                    offset[i].rw_pid,
1618                                    offset[i].rw_range_start,
1619                                    offset[i].rw_range_end,
1620                                    (unsigned long)offset[i].rw_smallest_extent,
1621                                    (unsigned long)offset[i].rw_largest_extent,
1622                                    offset[i].rw_offset);
1623         }
1624
1625         /* Then print the current offsets for each process */
1626         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1627                 if (process[i].rw_pid != 0)
1628                         seq_printf(seq,
1629                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1630                                    process[i].rw_op == READ ? 'R' : 'W',
1631                                    process[i].rw_pid,
1632                                    process[i].rw_range_start,
1633                                    process[i].rw_last_file_pos,
1634                                    (unsigned long)process[i].rw_smallest_extent,
1635                                    (unsigned long)process[i].rw_largest_extent,
1636                                    process[i].rw_offset);
1637         }
1638         spin_unlock(&sbi->ll_process_lock);
1639
1640         return 0;
1641 }
1642
1643 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
1644                                             const char __user *buf,
1645                                             size_t len, loff_t *off)
1646 {
1647         struct seq_file *seq = file->private_data;
1648         struct ll_sb_info *sbi = seq->private;
1649         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1650         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1651         int value = 1, rc = 0;
1652
1653         if (len == 0)
1654                 return -EINVAL;
1655
1656         rc = lprocfs_write_helper(buf, len, &value);
1657
1658         if (rc < 0 && len < 16) {
1659                 char kernbuf[16];
1660
1661                 if (copy_from_user(kernbuf, buf, len))
1662                         return -EFAULT;
1663                 kernbuf[len] = 0;
1664
1665                 if (kernbuf[len - 1] == '\n')
1666                         kernbuf[len - 1] = 0;
1667
1668                 if (strcmp(kernbuf, "disabled") == 0 ||
1669                     strcmp(kernbuf, "Disabled") == 0)
1670                         value = 0;
1671         }
1672
1673         if (value == 0)
1674                 sbi->ll_rw_stats_on = 0;
1675         else
1676                 sbi->ll_rw_stats_on = 1;
1677
1678         spin_lock(&sbi->ll_process_lock);
1679         sbi->ll_offset_process_count = 0;
1680         sbi->ll_rw_offset_entry_count = 0;
1681         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1682                LL_PROCESS_HIST_MAX);
1683         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1684                LL_OFFSET_HIST_MAX);
1685         spin_unlock(&sbi->ll_process_lock);
1686
1687         return len;
1688 }
1689
1690 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1691 #endif /* CONFIG_PROC_FS */