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_param.h>
  40 #include <lprocfs_status.h>
  41 #include <obd_support.h>
  42
  43 #include "llite_internal.h"
  44 #include "vvp_internal.h"
  45
  46 struct proc_dir_entry *proc_lustre_fs_root;
  47
  48 #ifdef LPROCFS
  49 /* /proc/lustre/llite mount point registration */
  50 struct file_operations ll_rw_extents_stats_fops;
  51 struct file_operations ll_rw_extents_stats_pp_fops;
  52 struct file_operations ll_rw_offset_stats_fops;
  53
  54 static int ll_blksize_seq_show(struct seq_file *m, void *v)
  55 {
  56         struct super_block *sb = m->private;
  57         struct obd_statfs osfs;
  58         int rc;
  59
  60         LASSERT(sb != NULL);
  61         rc = ll_statfs_internal(sb, &osfs,
  62                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  63                                 OBD_STATFS_NODELAY);
  64         if (!rc)
  65                 rc = seq_printf(m, "%u\n", osfs.os_bsize);
  66         return rc;
  67 }
  68 LPROC_SEQ_FOPS_RO(ll_blksize);
  69
  70 static int ll_kbytestotal_seq_show(struct seq_file *m, void *v)
  71 {
  72         struct super_block *sb = m->private;
  73         struct obd_statfs osfs;
  74         int rc;
  75
  76         LASSERT(sb != NULL);
  77         rc = ll_statfs_internal(sb, &osfs,
  78                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
  79                                 OBD_STATFS_NODELAY);
  80         if (!rc) {
  81                 __u32 blk_size = osfs.os_bsize >> 10;
  82                 __u64 result = osfs.os_blocks;
  83
  84                 while (blk_size >>= 1)
  85                         result <<= 1;
  86
  87                 rc = seq_printf(m, LPU64"\n", result);
  88         }
  89         return rc;
  90 }
  91 LPROC_SEQ_FOPS_RO(ll_kbytestotal);
  92
  93 static int ll_kbytesfree_seq_show(struct seq_file *m, void *v)
  94 {
  95         struct super_block *sb = m->private;
  96         struct obd_statfs osfs;
  97         int rc;
  98
  99         LASSERT(sb != NULL);
 100         rc = ll_statfs_internal(sb, &osfs,
 101                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 102                                 OBD_STATFS_NODELAY);
 103         if (!rc) {
 104                 __u32 blk_size = osfs.os_bsize >> 10;
 105                 __u64 result = osfs.os_bfree;
 106
 107                 while (blk_size >>= 1)
 108                         result <<= 1;
 109
 110                 rc = seq_printf(m, LPU64"\n", result);
 111         }
 112         return rc;
 113 }
 114 LPROC_SEQ_FOPS_RO(ll_kbytesfree);
 115
 116 static int ll_kbytesavail_seq_show(struct seq_file *m, void *v)
 117 {
 118         struct super_block *sb = m->private;
 119         struct obd_statfs osfs;
 120         int rc;
 121
 122         LASSERT(sb != NULL);
 123         rc = ll_statfs_internal(sb, &osfs,
 124                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 125                                 OBD_STATFS_NODELAY);
 126         if (!rc) {
 127                 __u32 blk_size = osfs.os_bsize >> 10;
 128                 __u64 result = osfs.os_bavail;
 129
 130                 while (blk_size >>= 1)
 131                         result <<= 1;
 132
 133                 rc = seq_printf(m, LPU64"\n", result);
 134         }
 135         return rc;
 136 }
 137 LPROC_SEQ_FOPS_RO(ll_kbytesavail);
 138
 139 static int ll_filestotal_seq_show(struct seq_file *m, void *v)
 140 {
 141         struct super_block *sb = m->private;
 142         struct obd_statfs osfs;
 143         int rc;
 144
 145         LASSERT(sb != NULL);
 146         rc = ll_statfs_internal(sb, &osfs,
 147                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 148                                 OBD_STATFS_NODELAY);
 149         if (!rc)
 150                 rc = seq_printf(m, LPU64"\n", osfs.os_files);
 151         return rc;
 152 }
 153 LPROC_SEQ_FOPS_RO(ll_filestotal);
 154
 155 static int ll_filesfree_seq_show(struct seq_file *m, void *v)
 156 {
 157         struct super_block *sb = m->private;
 158         struct obd_statfs osfs;
 159         int rc;
 160
 161         LASSERT(sb != NULL);
 162         rc = ll_statfs_internal(sb, &osfs,
 163                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
 164                                 OBD_STATFS_NODELAY);
 165         if (!rc)
 166                 rc = seq_printf(m, LPU64"\n", osfs.os_ffree);
 167         return rc;
 168 }
 169 LPROC_SEQ_FOPS_RO(ll_filesfree);
 170
 171 static int ll_client_type_seq_show(struct seq_file *m, void *v)
 172 {
 173         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 174         int rc;
 175
 176         LASSERT(sbi != NULL);
 177
 178         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
 179                 rc = seq_printf(m, "remote client\n");
 180         else
 181                 rc = seq_printf(m, "local client\n");
 182         return rc;
 183 }
 184 LPROC_SEQ_FOPS_RO(ll_client_type);
 185
 186 static int ll_fstype_seq_show(struct seq_file *m, void *v)
 187 {
 188         struct super_block *sb = m->private;
 189
 190         LASSERT(sb != NULL);
 191         return seq_printf(m, "%s\n", sb->s_type->name);
 192 }
 193 LPROC_SEQ_FOPS_RO(ll_fstype);
 194
 195 static int ll_sb_uuid_seq_show(struct seq_file *m, void *v)
 196 {
 197         struct super_block *sb = m->private;
 198
 199         LASSERT(sb != NULL);
 200         return seq_printf(m, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
 201 }
 202 LPROC_SEQ_FOPS_RO(ll_sb_uuid);
 203
 204 static int ll_xattr_cache_seq_show(struct seq_file *m, void *v)
 205 {
 206         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 207
 208         return seq_printf(m, "%u\n", sbi->ll_xattr_cache_enabled);
 209 }
 210
 211 static ssize_t ll_xattr_cache_seq_write(struct file *file,
 212                                         const char __user *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 __user *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         __u64 val;
 269         long pages_number;
 270         int mult;
 271         int rc;
 272
 273         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 274         rc = lprocfs_write_frac_u64_helper(buffer, count, &val, mult);
 275         if (rc)
 276                 return rc;
 277
 278         if (val > LONG_MAX)
 279                 return -ERANGE;
 280         pages_number = (long)val;
 281
 282         if (pages_number < 0 || pages_number > totalram_pages / 2) {
 283                 /* 1/2 of RAM */
 284                 CERROR("can't set file readahead more than %lu MB\n",
 285                        totalram_pages >> (20 - PAGE_CACHE_SHIFT + 1));
 286                 return -ERANGE;
 287         }
 288
 289         spin_lock(&sbi->ll_lock);
 290         sbi->ll_ra_info.ra_max_pages = pages_number;
 291         spin_unlock(&sbi->ll_lock);
 292         return count;
 293 }
 294 LPROC_SEQ_FOPS(ll_max_readahead_mb);
 295
 296 static int ll_max_readahead_per_file_mb_seq_show(struct seq_file *m, void *v)
 297 {
 298         struct super_block *sb = m->private;
 299         struct ll_sb_info *sbi = ll_s2sbi(sb);
 300         long pages_number;
 301         int mult;
 302
 303         spin_lock(&sbi->ll_lock);
 304         pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
 305         spin_unlock(&sbi->ll_lock);
 306
 307         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 308         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 309 }
 310
 311 static ssize_t
 312 ll_max_readahead_per_file_mb_seq_write(struct file *file,
 313                                        const char __user *buffer,
 314                                        size_t count, loff_t *off)
 315 {
 316         struct seq_file *m = file->private_data;
 317         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 318         int mult, rc, pages_number;
 319
 320         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 321         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 322         if (rc)
 323                 return rc;
 324
 325         if (pages_number < 0 ||
 326             pages_number > sbi->ll_ra_info.ra_max_pages) {
 327                 CERROR("can't set file readahead more than"
 328                        "max_read_ahead_mb %lu MB\n",
 329                        sbi->ll_ra_info.ra_max_pages);
 330                 return -ERANGE;
 331         }
 332
 333         spin_lock(&sbi->ll_lock);
 334         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 335         spin_unlock(&sbi->ll_lock);
 336         return count;
 337 }
 338 LPROC_SEQ_FOPS(ll_max_readahead_per_file_mb);
 339
 340 static int ll_max_read_ahead_whole_mb_seq_show(struct seq_file *m, void *v)
 341 {
 342         struct super_block *sb = m->private;
 343         struct ll_sb_info *sbi = ll_s2sbi(sb);
 344         long pages_number;
 345         int mult;
 346
 347         spin_lock(&sbi->ll_lock);
 348         pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
 349         spin_unlock(&sbi->ll_lock);
 350
 351         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 352         return lprocfs_seq_read_frac_helper(m, pages_number, mult);
 353 }
 354
 355 static ssize_t
 356 ll_max_read_ahead_whole_mb_seq_write(struct file *file,
 357                                      const char __user *buffer,
 358                                      size_t count, loff_t *off)
 359 {
 360         struct seq_file *m = file->private_data;
 361         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 362         int mult, rc, pages_number;
 363
 364         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 365         rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
 366         if (rc)
 367                 return rc;
 368
 369         /* Cap this at the current max readahead window size, the readahead
 370          * algorithm does this anyway so it's pointless to set it larger. */
 371         if (pages_number < 0 ||
 372             pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
 373                 CERROR("can't set max_read_ahead_whole_mb more than "
 374                        "max_read_ahead_per_file_mb: %lu\n",
 375                         sbi->ll_ra_info.ra_max_pages_per_file >>
 376                         (20 - PAGE_CACHE_SHIFT));
 377                 return -ERANGE;
 378         }
 379
 380         spin_lock(&sbi->ll_lock);
 381         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 382         spin_unlock(&sbi->ll_lock);
 383         return count;
 384 }
 385 LPROC_SEQ_FOPS(ll_max_read_ahead_whole_mb);
 386
 387 static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v)
 388 {
 389         struct super_block     *sb    = m->private;
 390         struct ll_sb_info      *sbi   = ll_s2sbi(sb);
 391         struct cl_client_cache *cache = &sbi->ll_cache;
 392         int shift = 20 - PAGE_CACHE_SHIFT;
 393         long max_cached_mb;
 394         long unused_mb;
 395
 396         max_cached_mb = cache->ccc_lru_max >> shift;
 397         unused_mb = atomic_long_read(&cache->ccc_lru_left) >> shift;
 398         return seq_printf(m,
 399                         "users: %d\n"
 400                         "max_cached_mb: %ld\n"
 401                         "used_mb: %ld\n"
 402                         "unused_mb: %ld\n"
 403                         "reclaim_count: %u\n",
 404                         atomic_read(&cache->ccc_users),
 405                         max_cached_mb,
 406                         max_cached_mb - unused_mb,
 407                         unused_mb,
 408                         cache->ccc_lru_shrinkers);
 409 }
 410
 411 static ssize_t
 412 ll_max_cached_mb_seq_write(struct file *file, const char __user *buffer,
 413                            size_t count, loff_t *off)
 414 {
 415         struct seq_file *m = file->private_data;
 416         struct super_block *sb = m->private;
 417         struct ll_sb_info *sbi = ll_s2sbi(sb);
 418         struct cl_client_cache *cache = &sbi->ll_cache;
 419         struct lu_env *env;
 420         __u64 val;
 421         long diff = 0;
 422         long nrpages = 0;
 423         long pages_number;
 424         int refcheck;
 425         int mult;
 426         long rc;
 427         char kernbuf[128];
 428         ENTRY;
 429
 430         if (count >= sizeof(kernbuf))
 431                 RETURN(-EINVAL);
 432
 433         if (copy_from_user(kernbuf, buffer, count))
 434                 RETURN(-EFAULT);
 435         kernbuf[count] = 0;
 436
 437         mult = 1 << (20 - PAGE_CACHE_SHIFT);
 438         buffer += lprocfs_find_named_value(kernbuf, "max_cached_mb:", &count) -
 439                   kernbuf;
 440         rc = lprocfs_write_frac_u64_helper(buffer, count, &val, mult);
 441         if (rc)
 442                 RETURN(rc);
 443
 444         if (val > LONG_MAX)
 445                 return -ERANGE;
 446         pages_number = (long)val;
 447
 448         if (pages_number < 0 || pages_number > totalram_pages) {
 449                 CERROR("%s: can't set max cache more than %lu MB\n",
 450                        ll_get_fsname(sb, NULL, 0),
 451                        totalram_pages >> (20 - PAGE_CACHE_SHIFT));
 452                 RETURN(-ERANGE);
 453         }
 454
 455         spin_lock(&sbi->ll_lock);
 456         diff = pages_number - cache->ccc_lru_max;
 457         spin_unlock(&sbi->ll_lock);
 458
 459         /* easy - add more LRU slots. */
 460         if (diff >= 0) {
 461                 atomic_long_add(diff, &cache->ccc_lru_left);
 462                 GOTO(out, rc = 0);
 463         }
 464
 465         env = cl_env_get(&refcheck);
 466         if (IS_ERR(env))
 467                 RETURN(rc);
 468
 469         diff = -diff;
 470         while (diff > 0) {
 471                 long tmp;
 472
 473                 /* reduce LRU budget from free slots. */
 474                 do {
 475                         long ov, nv;
 476
 477                         ov = atomic_long_read(&cache->ccc_lru_left);
 478                         if (ov == 0)
 479                                 break;
 480
 481                         nv = ov > diff ? ov - diff : 0;
 482                         rc = atomic_long_cmpxchg(&cache->ccc_lru_left, ov, nv);
 483                         if (likely(ov == rc)) {
 484                                 diff -= ov - nv;
 485                                 nrpages += ov - nv;
 486                                 break;
 487                         }
 488                 } while (1);
 489
 490                 if (diff <= 0)
 491                         break;
 492
 493                 if (sbi->ll_dt_exp == NULL) { /* being initialized */
 494                         rc = -ENODEV;
 495                         break;
 496                 }
 497
 498                 /* difficult - have to ask OSCs to drop LRU slots. */
 499                 tmp = diff << 1;
 500                 rc = obd_set_info_async(env, sbi->ll_dt_exp,
 501                                 sizeof(KEY_CACHE_LRU_SHRINK),
 502                                 KEY_CACHE_LRU_SHRINK,
 503                                 sizeof(tmp), &tmp, NULL);
 504                 if (rc < 0)
 505                         break;
 506         }
 507         cl_env_put(env, &refcheck);
 508
 509 out:
 510         if (rc >= 0) {
 511                 spin_lock(&sbi->ll_lock);
 512                 cache->ccc_lru_max = pages_number;
 513                 spin_unlock(&sbi->ll_lock);
 514                 rc = count;
 515         } else {
 516                 atomic_long_add(nrpages, &cache->ccc_lru_left);
 517         }
 518         return rc;
 519 }
 520 LPROC_SEQ_FOPS(ll_max_cached_mb);
 521
 522 static int ll_checksum_seq_show(struct seq_file *m, void *v)
 523 {
 524         struct super_block *sb = m->private;
 525         struct ll_sb_info *sbi = ll_s2sbi(sb);
 526
 527         return seq_printf(m, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 528 }
 529
 530 static ssize_t ll_checksum_seq_write(struct file *file,
 531                                      const char __user *buffer,
 532                                      size_t count, loff_t *off)
 533 {
 534         struct seq_file *m = file->private_data;
 535         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 536         int val, rc;
 537
 538         if (!sbi->ll_dt_exp)
 539                 /* Not set up yet */
 540                 return -EAGAIN;
 541
 542         rc = lprocfs_write_helper(buffer, count, &val);
 543         if (rc)
 544                 return rc;
 545         if (val)
 546                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 547         else
 548                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 549
 550         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 551                                 KEY_CHECKSUM, sizeof(val), &val, NULL);
 552         if (rc)
 553                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 554
 555         return count;
 556 }
 557 LPROC_SEQ_FOPS(ll_checksum);
 558
 559 static int ll_max_rw_chunk_seq_show(struct seq_file *m, void *v)
 560 {
 561         struct super_block *sb = m->private;
 562
 563         return seq_printf(m, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk);
 564 }
 565
 566 static ssize_t ll_max_rw_chunk_seq_write(struct file *file,
 567                                          const char __user *buffer,
 568                                          size_t count, loff_t *off)
 569 {
 570         struct seq_file *m = file->private_data;
 571         struct super_block *sb = m->private;
 572         int rc, val;
 573
 574         rc = lprocfs_write_helper(buffer, count, &val);
 575         if (rc)
 576                 return rc;
 577         ll_s2sbi(sb)->ll_max_rw_chunk = val;
 578         return count;
 579 }
 580 LPROC_SEQ_FOPS(ll_max_rw_chunk);
 581
 582 static int ll_rd_track_id(struct seq_file *m, enum stats_track_type type)
 583 {
 584         struct super_block *sb = m->private;
 585
 586         if (ll_s2sbi(sb)->ll_stats_track_type == type) {
 587                 return seq_printf(m, "%d\n",
 588                                   ll_s2sbi(sb)->ll_stats_track_id);
 589         } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
 590                 return seq_printf(m, "0 (all)\n");
 591         } else {
 592                 return seq_printf(m, "untracked\n");
 593         }
 594 }
 595
 596 static int ll_wr_track_id(const char __user *buffer, unsigned long count,
 597                           void *data, enum stats_track_type type)
 598 {
 599         struct super_block *sb = data;
 600         int rc, pid;
 601
 602         rc = lprocfs_write_helper(buffer, count, &pid);
 603         if (rc)
 604                 return rc;
 605         ll_s2sbi(sb)->ll_stats_track_id = pid;
 606         if (pid == 0)
 607                 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
 608         else
 609                 ll_s2sbi(sb)->ll_stats_track_type = type;
 610         lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
 611         return count;
 612 }
 613
 614 static int ll_track_pid_seq_show(struct seq_file *m, void *v)
 615 {
 616         return ll_rd_track_id(m, STATS_TRACK_PID);
 617 }
 618
 619 static ssize_t ll_track_pid_seq_write(struct file *file,
 620                                       const char __user *buffer,
 621                                       size_t count, loff_t *off)
 622 {
 623         struct seq_file *seq = file->private_data;
 624         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PID);
 625 }
 626 LPROC_SEQ_FOPS(ll_track_pid);
 627
 628 static int ll_track_ppid_seq_show(struct seq_file *m, void *v)
 629 {
 630         return ll_rd_track_id(m, STATS_TRACK_PPID);
 631 }
 632
 633 static ssize_t ll_track_ppid_seq_write(struct file *file,
 634                                        const char __user *buffer,
 635                                        size_t count, loff_t *off)
 636 {
 637         struct seq_file *seq = file->private_data;
 638         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PPID);
 639 }
 640 LPROC_SEQ_FOPS(ll_track_ppid);
 641
 642 static int ll_track_gid_seq_show(struct seq_file *m, void *v)
 643 {
 644         return ll_rd_track_id(m, STATS_TRACK_GID);
 645 }
 646
 647 static ssize_t ll_track_gid_seq_write(struct file *file,
 648                                       const char __user *buffer,
 649                                       size_t count, loff_t *off)
 650 {
 651         struct seq_file *seq = file->private_data;
 652         return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_GID);
 653 }
 654 LPROC_SEQ_FOPS(ll_track_gid);
 655
 656 static int ll_statahead_max_seq_show(struct seq_file *m, void *v)
 657 {
 658         struct super_block *sb = m->private;
 659         struct ll_sb_info *sbi = ll_s2sbi(sb);
 660
 661         return seq_printf(m, "%u\n", sbi->ll_sa_max);
 662 }
 663
 664 static ssize_t ll_statahead_max_seq_write(struct file *file,
 665                                           const char __user *buffer,
 666                                           size_t count, loff_t *off)
 667 {
 668         struct seq_file *m = file->private_data;
 669         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 670         int val, rc;
 671
 672         rc = lprocfs_write_helper(buffer, count, &val);
 673         if (rc)
 674                 return rc;
 675
 676         if (val >= 0 && val <= LL_SA_RPC_MAX)
 677                 sbi->ll_sa_max = val;
 678         else
 679                 CERROR("Bad statahead_max value %d. Valid values are in the "
 680                        "range [0, %d]\n", val, LL_SA_RPC_MAX);
 681
 682         return count;
 683 }
 684 LPROC_SEQ_FOPS(ll_statahead_max);
 685
 686 static int ll_statahead_agl_seq_show(struct seq_file *m, void *v)
 687 {
 688         struct super_block *sb = m->private;
 689         struct ll_sb_info *sbi = ll_s2sbi(sb);
 690
 691         return seq_printf(m, "%u\n",
 692                           sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
 693 }
 694
 695 static ssize_t ll_statahead_agl_seq_write(struct file *file,
 696                                           const char __user *buffer,
 697                                           size_t count, loff_t *off)
 698 {
 699         struct seq_file *m = file->private_data;
 700         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 701         int val, rc;
 702
 703         rc = lprocfs_write_helper(buffer, count, &val);
 704         if (rc)
 705                 return rc;
 706
 707         if (val)
 708                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 709         else
 710                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
 711
 712         return count;
 713 }
 714 LPROC_SEQ_FOPS(ll_statahead_agl);
 715
 716 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
 717 {
 718         struct super_block *sb = m->private;
 719         struct ll_sb_info *sbi = ll_s2sbi(sb);
 720
 721         return seq_printf(m,
 722                         "statahead total: %u\n"
 723                         "statahead wrong: %u\n"
 724                         "agl total: %u\n",
 725                         atomic_read(&sbi->ll_sa_total),
 726                         atomic_read(&sbi->ll_sa_wrong),
 727                         atomic_read(&sbi->ll_agl_total));
 728 }
 729 LPROC_SEQ_FOPS_RO(ll_statahead_stats);
 730
 731 static int ll_lazystatfs_seq_show(struct seq_file *m, void *v)
 732 {
 733         struct super_block *sb = m->private;
 734         struct ll_sb_info *sbi = ll_s2sbi(sb);
 735
 736         return seq_printf(m, "%u\n",
 737                           (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 738 }
 739
 740 static ssize_t ll_lazystatfs_seq_write(struct file *file,
 741                                        const char __user *buffer,
 742                                         size_t count, loff_t *off)
 743 {
 744         struct seq_file *m = file->private_data;
 745         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
 746         int val, rc;
 747
 748         rc = lprocfs_write_helper(buffer, count, &val);
 749         if (rc)
 750                 return rc;
 751
 752         if (val)
 753                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 754         else
 755                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 756
 757         return count;
 758 }
 759 LPROC_SEQ_FOPS(ll_lazystatfs);
 760
 761 static int ll_max_easize_seq_show(struct seq_file *m, void *v)
 762 {
 763         struct super_block *sb = m->private;
 764         struct ll_sb_info *sbi = ll_s2sbi(sb);
 765         unsigned int ealen;
 766         int rc;
 767
 768         rc = ll_get_max_mdsize(sbi, &ealen);
 769         if (rc)
 770                 return rc;
 771
 772         return seq_printf(m, "%u\n", ealen);
 773 }
 774 LPROC_SEQ_FOPS_RO(ll_max_easize);
 775
 776 static int ll_defult_easize_seq_show(struct seq_file *m, void *v)
 777 {
 778         struct super_block *sb = m->private;
 779         struct ll_sb_info *sbi = ll_s2sbi(sb);
 780         unsigned int ealen;
 781         int rc;
 782
 783         rc = ll_get_default_mdsize(sbi, &ealen);
 784         if (rc)
 785                 return rc;
 786
 787         return seq_printf(m, "%u\n", ealen);
 788 }
 789 LPROC_SEQ_FOPS_RO(ll_defult_easize);
 790
 791 static int ll_max_cookiesize_seq_show(struct seq_file *m, void *v)
 792 {
 793         struct super_block *sb = m->private;
 794         struct ll_sb_info *sbi = ll_s2sbi(sb);
 795         unsigned int cookielen;
 796         int rc;
 797
 798         rc = ll_get_max_cookiesize(sbi, &cookielen);
 799         if (rc)
 800                 return rc;
 801
 802         return seq_printf(m, "%u\n", cookielen);
 803 }
 804 LPROC_SEQ_FOPS_RO(ll_max_cookiesize);
 805
 806 static int ll_defult_cookiesize_seq_show(struct seq_file *m, void *v)
 807 {
 808         struct super_block *sb = m->private;
 809         struct ll_sb_info *sbi = ll_s2sbi(sb);
 810         unsigned int cookielen;
 811         int rc;
 812
 813         rc = ll_get_default_cookiesize(sbi, &cookielen);
 814         if (rc)
 815                 return rc;
 816
 817         return seq_printf(m, "%u\n", cookielen);
 818 }
 819 LPROC_SEQ_FOPS_RO(ll_defult_cookiesize);
 820
 821 static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
 822 {
 823         const char *str[] = LL_SBI_FLAGS;
 824         struct super_block *sb = m->private;
 825         int flags = ll_s2sbi(sb)->ll_flags;
 826         int i = 0;
 827
 828         while (flags != 0) {
 829                 if (ARRAY_SIZE(str) <= i) {
 830                         CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
 831                                 "flags please.\n", ll_get_fsname(sb, NULL, 0));
 832                         return -EINVAL;
 833                 }
 834
 835                 if (flags & 0x1)
 836                         seq_printf(m, "%s ", str[i]);
 837                 flags >>= 1;
 838                 ++i;
 839         }
 840         seq_printf(m, "\b\n");
 841         return 0;
 842 }
 843 LPROC_SEQ_FOPS_RO(ll_sbi_flags);
 844
 845 static int ll_unstable_stats_seq_show(struct seq_file *m, void *v)
 846 {
 847         struct super_block      *sb    = m->private;
 848         struct ll_sb_info       *sbi   = ll_s2sbi(sb);
 849         struct cl_client_cache  *cache = &sbi->ll_cache;
 850         long pages;
 851         int mb;
 852
 853         pages = atomic_long_read(&cache->ccc_unstable_nr);
 854         mb    = (pages * PAGE_CACHE_SIZE) >> 20;
 855
 856         return seq_printf(m, "unstable_check:     %8d\n"
 857                              "unstable_pages: %12ld\n"
 858                              "unstable_mb:        %8d\n",
 859                           cache->ccc_unstable_check, pages, mb);
 860 }
 861
 862 static ssize_t ll_unstable_stats_seq_write(struct file *file,
 863                                            const char __user *buffer,
 864                                            size_t count, loff_t *unused)
 865 {
 866         struct seq_file *seq = file->private_data;
 867         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)seq->private);
 868         char kernbuf[128];
 869         int val, rc;
 870
 871         if (count == 0)
 872                 return 0;
 873         if (count >= sizeof(kernbuf))
 874                 return -EINVAL;
 875
 876         if (copy_from_user(kernbuf, buffer, count))
 877                 return -EFAULT;
 878         kernbuf[count] = 0;
 879
 880         buffer += lprocfs_find_named_value(kernbuf, "unstable_check:", &count) -
 881                   kernbuf;
 882         rc = lprocfs_write_helper(buffer, count, &val);
 883         if (rc < 0)
 884                 return rc;
 885
 886         /* borrow lru lock to set the value */
 887         spin_lock(&sbi->ll_cache.ccc_lru_lock);
 888         sbi->ll_cache.ccc_unstable_check = !!val;
 889         spin_unlock(&sbi->ll_cache.ccc_lru_lock);
 890
 891         return count;
 892 }
 893 LPROC_SEQ_FOPS(ll_unstable_stats);
 894
 895 static int ll_root_squash_seq_show(struct seq_file *m, void *v)
 896 {
 897         struct super_block *sb = m->private;
 898         struct ll_sb_info *sbi = ll_s2sbi(sb);
 899         struct root_squash_info *squash = &sbi->ll_squash;
 900
 901         return seq_printf(m, "%u:%u\n", squash->rsi_uid, squash->rsi_gid);
 902 }
 903
 904 static ssize_t ll_root_squash_seq_write(struct file *file,
 905                                         const char __user *buffer,
 906                                         size_t count, loff_t *off)
 907 {
 908         struct seq_file *m = file->private_data;
 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 lprocfs_wr_root_squash(buffer, count, squash,
 914                                       ll_get_fsname(sb, NULL, 0));
 915 }
 916 LPROC_SEQ_FOPS(ll_root_squash);
 917
 918 static int ll_nosquash_nids_seq_show(struct seq_file *m, void *v)
 919 {
 920         struct super_block *sb = m->private;
 921         struct ll_sb_info *sbi = ll_s2sbi(sb);
 922         struct root_squash_info *squash = &sbi->ll_squash;
 923         int len, rc;
 924
 925         down_read(&squash->rsi_sem);
 926         if (!list_empty(&squash->rsi_nosquash_nids)) {
 927                 len = cfs_print_nidlist(m->buf + m->count, m->size - m->count,
 928                                         &squash->rsi_nosquash_nids);
 929                 m->count += len;
 930                 rc = seq_printf(m, "\n");
 931         } else {
 932                 rc = seq_printf(m, "NONE\n");
 933         }
 934         up_read(&squash->rsi_sem);
 935
 936         return rc;
 937 }
 938
 939 static ssize_t ll_nosquash_nids_seq_write(struct file *file,
 940                                           const char __user *buffer,
 941                                           size_t count, loff_t *off)
 942 {
 943         struct seq_file *m = file->private_data;
 944         struct super_block *sb = m->private;
 945         struct ll_sb_info *sbi = ll_s2sbi(sb);
 946         struct root_squash_info *squash = &sbi->ll_squash;
 947         int rc;
 948
 949         rc = lprocfs_wr_nosquash_nids(buffer, count, squash,
 950                                       ll_get_fsname(sb, NULL, 0));
 951         if (rc < 0)
 952                 return rc;
 953
 954         ll_compute_rootsquash_state(sbi);
 955
 956         return rc;
 957 }
 958 LPROC_SEQ_FOPS(ll_nosquash_nids);
 959
 960 struct lprocfs_seq_vars lprocfs_llite_obd_vars[] = {
 961         { .name =       "uuid",
 962           .fops =       &ll_sb_uuid_fops                        },
 963         { .name =       "fstype",
 964           .fops =       &ll_fstype_fops                         },
 965         { .name =       "site",
 966           .fops =       &ll_site_stats_fops                     },
 967         { .name =       "blocksize",
 968           .fops =       &ll_blksize_fops                        },
 969         { .name =       "kbytestotal",
 970           .fops =       &ll_kbytestotal_fops                    },
 971         { .name =       "kbytesfree",
 972           .fops =       &ll_kbytesfree_fops                     },
 973         { .name =       "kbytesavail",
 974           .fops =       &ll_kbytesavail_fops                    },
 975         { .name =       "filestotal",
 976           .fops =       &ll_filestotal_fops                     },
 977         { .name =       "filesfree",
 978           .fops =       &ll_filesfree_fops                      },
 979         { .name =       "client_type",
 980           .fops =       &ll_client_type_fops                    },
 981         { .name =       "max_read_ahead_mb",
 982           .fops =       &ll_max_readahead_mb_fops               },
 983         { .name =       "max_read_ahead_per_file_mb",
 984           .fops =       &ll_max_readahead_per_file_mb_fops      },
 985         { .name =       "max_read_ahead_whole_mb",
 986           .fops =       &ll_max_read_ahead_whole_mb_fops        },
 987         { .name =       "max_cached_mb",
 988           .fops =       &ll_max_cached_mb_fops                  },
 989         { .name =       "checksum_pages",
 990           .fops =       &ll_checksum_fops                       },
 991         { .name =       "max_rw_chunk",
 992           .fops =       &ll_max_rw_chunk_fops                   },
 993         { .name =       "stats_track_pid",
 994           .fops =       &ll_track_pid_fops                      },
 995         { .name =       "stats_track_ppid",
 996           .fops =       &ll_track_ppid_fops                     },
 997         { .name =       "stats_track_gid",
 998           .fops =       &ll_track_gid_fops                      },
 999         { .name =       "statahead_max",
1000           .fops =       &ll_statahead_max_fops                  },
1001         { .name =       "statahead_agl",
1002           .fops =       &ll_statahead_agl_fops                  },
1003         { .name =       "statahead_stats",
1004           .fops =       &ll_statahead_stats_fops                },
1005         { .name =       "lazystatfs",
1006           .fops =       &ll_lazystatfs_fops                     },
1007         { .name =       "max_easize",
1008           .fops =       &ll_max_easize_fops                     },
1009         { .name =       "default_easize",
1010           .fops =       &ll_defult_easize_fops                  },
1011         { .name =       "max_cookiesize",
1012           .fops =       &ll_max_cookiesize_fops                 },
1013         { .name =       "default_cookiesize",
1014           .fops =       &ll_defult_cookiesize_fops              },
1015         { .name =       "sbi_flags",
1016           .fops =       &ll_sbi_flags_fops                      },
1017         { .name =       "xattr_cache",
1018           .fops =       &ll_xattr_cache_fops                    },
1019         { .name =       "unstable_stats",
1020           .fops =       &ll_unstable_stats_fops                 },
1021         { .name =       "root_squash",
1022           .fops =       &ll_root_squash_fops                    },
1023         { .name =       "nosquash_nids",
1024           .fops =       &ll_nosquash_nids_fops                  },
1025         { 0 }
1026 };
1027
1028 #define MAX_STRING_SIZE 128
1029
1030 static const struct llite_file_opcode {
1031         __u32       opcode;
1032         __u32       type;
1033         const char *opname;
1034 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
1035         /* file operation */
1036         { LPROC_LL_DIRTY_HITS,     LPROCFS_TYPE_REGS, "dirty_pages_hits" },
1037         { LPROC_LL_DIRTY_MISSES,   LPROCFS_TYPE_REGS, "dirty_pages_misses" },
1038         { LPROC_LL_READ_BYTES,     LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
1039                                    "read_bytes" },
1040         { LPROC_LL_WRITE_BYTES,    LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
1041                                    "write_bytes" },
1042         { LPROC_LL_BRW_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
1043                                    "brw_read" },
1044         { LPROC_LL_BRW_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
1045                                    "brw_write" },
1046         { LPROC_LL_OSC_READ,       LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
1047                                    "osc_read" },
1048         { LPROC_LL_OSC_WRITE,      LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
1049                                    "osc_write" },
1050         { LPROC_LL_IOCTL,          LPROCFS_TYPE_REGS, "ioctl" },
1051         { LPROC_LL_OPEN,           LPROCFS_TYPE_REGS, "open" },
1052         { LPROC_LL_RELEASE,        LPROCFS_TYPE_REGS, "close" },
1053         { LPROC_LL_MAP,            LPROCFS_TYPE_REGS, "mmap" },
1054         { LPROC_LL_LLSEEK,         LPROCFS_TYPE_REGS, "seek" },
1055         { LPROC_LL_FSYNC,          LPROCFS_TYPE_REGS, "fsync" },
1056         { LPROC_LL_READDIR,        LPROCFS_TYPE_REGS, "readdir" },
1057         /* inode operation */
1058         { LPROC_LL_SETATTR,        LPROCFS_TYPE_REGS, "setattr" },
1059         { LPROC_LL_TRUNC,          LPROCFS_TYPE_REGS, "truncate" },
1060         { LPROC_LL_FLOCK,          LPROCFS_TYPE_REGS, "flock" },
1061         { LPROC_LL_GETATTR,        LPROCFS_TYPE_REGS, "getattr" },
1062         /* dir inode operation */
1063         { LPROC_LL_CREATE,         LPROCFS_TYPE_REGS, "create" },
1064         { LPROC_LL_LINK,           LPROCFS_TYPE_REGS, "link" },
1065         { LPROC_LL_UNLINK,         LPROCFS_TYPE_REGS, "unlink" },
1066         { LPROC_LL_SYMLINK,        LPROCFS_TYPE_REGS, "symlink" },
1067         { LPROC_LL_MKDIR,          LPROCFS_TYPE_REGS, "mkdir" },
1068         { LPROC_LL_RMDIR,          LPROCFS_TYPE_REGS, "rmdir" },
1069         { LPROC_LL_MKNOD,          LPROCFS_TYPE_REGS, "mknod" },
1070         { LPROC_LL_RENAME,         LPROCFS_TYPE_REGS, "rename" },
1071         /* special inode operation */
1072         { LPROC_LL_STAFS,          LPROCFS_TYPE_REGS, "statfs" },
1073         { LPROC_LL_ALLOC_INODE,    LPROCFS_TYPE_REGS, "alloc_inode" },
1074         { LPROC_LL_SETXATTR,       LPROCFS_TYPE_REGS, "setxattr" },
1075         { LPROC_LL_GETXATTR,       LPROCFS_TYPE_REGS, "getxattr" },
1076         { LPROC_LL_GETXATTR_HITS,  LPROCFS_TYPE_REGS, "getxattr_hits" },
1077         { LPROC_LL_LISTXATTR,      LPROCFS_TYPE_REGS, "listxattr" },
1078         { LPROC_LL_REMOVEXATTR,    LPROCFS_TYPE_REGS, "removexattr" },
1079         { LPROC_LL_INODE_PERM,     LPROCFS_TYPE_REGS, "inode_permission" },
1080 };
1081
1082 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
1083 {
1084         if (!sbi->ll_stats)
1085                 return;
1086         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
1087                 lprocfs_counter_add(sbi->ll_stats, op, count);
1088         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
1089                  sbi->ll_stats_track_id == current->pid)
1090                 lprocfs_counter_add(sbi->ll_stats, op, count);
1091         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
1092                  sbi->ll_stats_track_id == current->parent->pid)
1093                 lprocfs_counter_add(sbi->ll_stats, op, count);
1094         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
1095                  sbi->ll_stats_track_id ==
1096                         from_kgid(&init_user_ns, current_gid()))
1097                 lprocfs_counter_add(sbi->ll_stats, op, count);
1098 }
1099 EXPORT_SYMBOL(ll_stats_ops_tally);
1100
1101 static const char *ra_stat_string[] = {
1102         [RA_STAT_HIT] = "hits",
1103         [RA_STAT_MISS] = "misses",
1104         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
1105         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
1106         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
1107         [RA_STAT_FAILED_MATCH] = "failed lock match",
1108         [RA_STAT_DISCARDED] = "read but discarded",
1109         [RA_STAT_ZERO_LEN] = "zero length file",
1110         [RA_STAT_ZERO_WINDOW] = "zero size window",
1111         [RA_STAT_EOF] = "read-ahead to EOF",
1112         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
1113         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
1114         [RA_STAT_FAILED_REACH_END] = "failed to reach end"
1115 };
1116
1117 LPROC_SEQ_FOPS_RO_TYPE(llite, name);
1118 LPROC_SEQ_FOPS_RO_TYPE(llite, uuid);
1119
1120 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
1121                                 struct super_block *sb, char *osc, char *mdc)
1122 {
1123         struct lprocfs_seq_vars lvars[2];
1124         struct lustre_sb_info *lsi = s2lsi(sb);
1125         struct ll_sb_info *sbi = ll_s2sbi(sb);
1126         struct obd_device *obd;
1127         struct proc_dir_entry *dir;
1128         char name[MAX_STRING_SIZE + 1], *ptr;
1129         int err, id, len, rc;
1130         ENTRY;
1131
1132         memset(lvars, 0, sizeof(lvars));
1133
1134         name[MAX_STRING_SIZE] = '\0';
1135         lvars[0].name = name;
1136
1137         LASSERT(sbi != NULL);
1138         LASSERT(mdc != NULL);
1139         LASSERT(osc != NULL);
1140
1141         /* Get fsname */
1142         len = strlen(lsi->lsi_lmd->lmd_profile);
1143         ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
1144         if (ptr && (strcmp(ptr, "-client") == 0))
1145                 len -= 7;
1146
1147         /* Mount info */
1148         snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
1149                  lsi->lsi_lmd->lmd_profile, sb);
1150
1151         sbi->ll_proc_root = lprocfs_seq_register(name, parent, NULL, NULL);
1152         if (IS_ERR(sbi->ll_proc_root)) {
1153                 err = PTR_ERR(sbi->ll_proc_root);
1154                 sbi->ll_proc_root = NULL;
1155                 RETURN(err);
1156         }
1157
1158         rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
1159                                 &vvp_dump_pgcache_file_ops, sbi);
1160         if (rc)
1161                 CWARN("Error adding the dump_page_cache file\n");
1162
1163         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
1164                                 &ll_rw_extents_stats_fops, sbi);
1165         if (rc)
1166                 CWARN("Error adding the extent_stats file\n");
1167
1168         rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
1169                                 0644, &ll_rw_extents_stats_pp_fops, sbi);
1170         if (rc)
1171                 CWARN("Error adding the extents_stats_per_process file\n");
1172
1173         rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
1174                                 &ll_rw_offset_stats_fops, sbi);
1175         if (rc)
1176                 CWARN("Error adding the offset_stats file\n");
1177
1178         /* File operations stats */
1179         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
1180                                             LPROCFS_STATS_FLAG_NONE);
1181         if (sbi->ll_stats == NULL)
1182                 GOTO(out, err = -ENOMEM);
1183         /* do counter init */
1184         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
1185                 __u32 type = llite_opcode_table[id].type;
1186                 void *ptr = NULL;
1187                 if (type & LPROCFS_TYPE_REGS)
1188                         ptr = "regs";
1189                 else if (type & LPROCFS_TYPE_BYTES)
1190                         ptr = "bytes";
1191                 else if (type & LPROCFS_TYPE_PAGES)
1192                         ptr = "pages";
1193                 lprocfs_counter_init(sbi->ll_stats,
1194                                      llite_opcode_table[id].opcode,
1195                                      (type & LPROCFS_CNTR_AVGMINMAX),
1196                                      llite_opcode_table[id].opname, ptr);
1197         }
1198         err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
1199         if (err)
1200                 GOTO(out, err);
1201
1202         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1203                                                LPROCFS_STATS_FLAG_NONE);
1204         if (sbi->ll_ra_stats == NULL)
1205                 GOTO(out, err = -ENOMEM);
1206
1207         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1208                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
1209                                      ra_stat_string[id], "pages");
1210         err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
1211                                      sbi->ll_ra_stats);
1212         if (err)
1213                 GOTO(out, err);
1214
1215
1216         err = lprocfs_seq_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
1217         if (err)
1218                 GOTO(out, err);
1219
1220         /* MDC info */
1221         obd = class_name2obd(mdc);
1222
1223         LASSERT(obd != NULL);
1224         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1225         LASSERT(obd->obd_type->typ_name != NULL);
1226
1227         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1228         if (dir == NULL)
1229                 GOTO(out, err = -ENOMEM);
1230
1231         snprintf(name, MAX_STRING_SIZE, "common_name");
1232         lvars[0].fops = &llite_name_fops;
1233         err = lprocfs_seq_add_vars(dir, lvars, obd);
1234         if (err)
1235                 GOTO(out, err);
1236
1237         snprintf(name, MAX_STRING_SIZE, "uuid");
1238         lvars[0].fops = &llite_uuid_fops;
1239         err = lprocfs_seq_add_vars(dir, lvars, obd);
1240         if (err)
1241                 GOTO(out, err);
1242
1243         /* OSC */
1244         obd = class_name2obd(osc);
1245
1246         LASSERT(obd != NULL);
1247         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1248         LASSERT(obd->obd_type->typ_name != NULL);
1249
1250         dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1251         if (dir == NULL)
1252                 GOTO(out, err = -ENOMEM);
1253
1254         snprintf(name, MAX_STRING_SIZE, "common_name");
1255         lvars[0].fops = &llite_name_fops;
1256         err = lprocfs_seq_add_vars(dir, lvars, obd);
1257         if (err)
1258                 GOTO(out, err);
1259
1260         snprintf(name, MAX_STRING_SIZE, "uuid");
1261         lvars[0].fops = &llite_uuid_fops;
1262         err = lprocfs_seq_add_vars(dir, lvars, obd);
1263 out:
1264         if (err) {
1265                 lprocfs_remove(&sbi->ll_proc_root);
1266                 lprocfs_free_stats(&sbi->ll_ra_stats);
1267                 lprocfs_free_stats(&sbi->ll_stats);
1268         }
1269         RETURN(err);
1270 }
1271
1272 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
1273 {
1274         if (sbi->ll_proc_root) {
1275                 lprocfs_remove(&sbi->ll_proc_root);
1276                 lprocfs_free_stats(&sbi->ll_ra_stats);
1277                 lprocfs_free_stats(&sbi->ll_stats);
1278         }
1279 }
1280 #undef MAX_STRING_SIZE
1281
1282 #define pct(a,b) (b ? a * 100 / b : 0)
1283
1284 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1285                                    struct seq_file *seq, int which)
1286 {
1287         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1288         unsigned long start, end, r, w;
1289         char *unitp = "KMGTPEZY";
1290         int i, units = 10;
1291         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1292
1293         read_cum = 0;
1294         write_cum = 0;
1295         start = 0;
1296
1297         for(i = 0; i < LL_HIST_MAX; i++) {
1298                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1299                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1300         }
1301
1302         for(i = 0; i < LL_HIST_MAX; i++) {
1303                 r = pp_info->pp_r_hist.oh_buckets[i];
1304                 w = pp_info->pp_w_hist.oh_buckets[i];
1305                 read_cum += r;
1306                 write_cum += w;
1307                 end = 1 << (i + LL_HIST_START - units);
1308                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu  | "
1309                            "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
1310                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1311                            r, pct(r, read_tot), pct(read_cum, read_tot),
1312                            w, pct(w, write_tot), pct(write_cum, write_tot));
1313                 start = end;
1314                 if (start == 1<<10) {
1315                         start = 1;
1316                         units += 10;
1317                         unitp++;
1318                 }
1319                 if (read_cum == read_tot && write_cum == write_tot)
1320                         break;
1321         }
1322 }
1323
1324 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1325 {
1326         struct timeval now;
1327         struct ll_sb_info *sbi = seq->private;
1328         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1329         int k;
1330
1331         do_gettimeofday(&now);
1332
1333         if (!sbi->ll_rw_stats_on) {
1334                 seq_printf(seq, "disabled\n"
1335                                 "write anything in this file to activate, "
1336                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1337                 return 0;
1338         }
1339         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1340                    now.tv_sec, now.tv_usec);
1341         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1342         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1343                    "extents", "calls", "%", "cum%",
1344                    "calls", "%", "cum%");
1345         spin_lock(&sbi->ll_pp_extent_lock);
1346         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1347                 if (io_extents->pp_extents[k].pid != 0) {
1348                         seq_printf(seq, "\nPID: %d\n",
1349                                    io_extents->pp_extents[k].pid);
1350                         ll_display_extents_info(io_extents, seq, k);
1351                 }
1352         }
1353         spin_unlock(&sbi->ll_pp_extent_lock);
1354         return 0;
1355 }
1356
1357 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1358                                                 const char __user *buf,
1359                                                 size_t len,
1360                                                 loff_t *off)
1361 {
1362         struct seq_file *seq = file->private_data;
1363         struct ll_sb_info *sbi = seq->private;
1364         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1365         int i;
1366         int value = 1, rc = 0;
1367
1368         if (len == 0)
1369                 return -EINVAL;
1370
1371         rc = lprocfs_write_helper(buf, len, &value);
1372         if (rc < 0 && len < 16) {
1373                 char kernbuf[16];
1374
1375                 if (copy_from_user(kernbuf, buf, len))
1376                         return -EFAULT;
1377                 kernbuf[len] = 0;
1378
1379                 if (kernbuf[len - 1] == '\n')
1380                         kernbuf[len - 1] = 0;
1381
1382                 if (strcmp(kernbuf, "disabled") == 0 ||
1383                     strcmp(kernbuf, "Disabled") == 0)
1384                         value = 0;
1385         }
1386
1387         if (value == 0)
1388                 sbi->ll_rw_stats_on = 0;
1389         else
1390                 sbi->ll_rw_stats_on = 1;
1391
1392         spin_lock(&sbi->ll_pp_extent_lock);
1393         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1394                 io_extents->pp_extents[i].pid = 0;
1395                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1396                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1397         }
1398         spin_unlock(&sbi->ll_pp_extent_lock);
1399         return len;
1400 }
1401
1402 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1403
1404 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1405 {
1406         struct timeval now;
1407         struct ll_sb_info *sbi = seq->private;
1408         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1409
1410         do_gettimeofday(&now);
1411
1412         if (!sbi->ll_rw_stats_on) {
1413                 seq_printf(seq, "disabled\n"
1414                                 "write anything in this file to activate, "
1415                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1416                 return 0;
1417         }
1418         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1419                    now.tv_sec, now.tv_usec);
1420
1421         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1422         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1423                    "extents", "calls", "%", "cum%",
1424                    "calls", "%", "cum%");
1425         spin_lock(&sbi->ll_lock);
1426         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1427         spin_unlock(&sbi->ll_lock);
1428
1429         return 0;
1430 }
1431
1432 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
1433                                              const char __user *buf,
1434                                              size_t len, loff_t *off)
1435 {
1436         struct seq_file *seq = file->private_data;
1437         struct ll_sb_info *sbi = seq->private;
1438         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1439         int i;
1440         int value = 1, rc = 0;
1441
1442         if (len == 0)
1443                 return -EINVAL;
1444
1445         rc = lprocfs_write_helper(buf, len, &value);
1446         if (rc < 0 && len < 16) {
1447                 char kernbuf[16];
1448
1449                 if (copy_from_user(kernbuf, buf, len))
1450                         return -EFAULT;
1451                 kernbuf[len] = 0;
1452
1453                 if (kernbuf[len - 1] == '\n')
1454                         kernbuf[len - 1] = 0;
1455
1456                 if (strcmp(kernbuf, "disabled") == 0 ||
1457                     strcmp(kernbuf, "Disabled") == 0)
1458                         value = 0;
1459         }
1460
1461         if (value == 0)
1462                 sbi->ll_rw_stats_on = 0;
1463         else
1464                 sbi->ll_rw_stats_on = 1;
1465
1466         spin_lock(&sbi->ll_pp_extent_lock);
1467         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1468                 io_extents->pp_extents[i].pid = 0;
1469                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1470                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1471         }
1472         spin_unlock(&sbi->ll_pp_extent_lock);
1473
1474         return len;
1475 }
1476 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1477
1478 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1479                        struct ll_file_data *file, loff_t pos,
1480                        size_t count, int rw)
1481 {
1482         int i, cur = -1;
1483         struct ll_rw_process_info *process;
1484         struct ll_rw_process_info *offset;
1485         int *off_count = &sbi->ll_rw_offset_entry_count;
1486         int *process_count = &sbi->ll_offset_process_count;
1487         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1488
1489         if(!sbi->ll_rw_stats_on)
1490                 return;
1491         process = sbi->ll_rw_process_info;
1492         offset = sbi->ll_rw_offset_info;
1493
1494         spin_lock(&sbi->ll_pp_extent_lock);
1495         /* Extent statistics */
1496         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1497                 if(io_extents->pp_extents[i].pid == pid) {
1498                         cur = i;
1499                         break;
1500                 }
1501         }
1502
1503         if (cur == -1) {
1504                 /* new process */
1505                 sbi->ll_extent_process_count =
1506                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1507                 cur = sbi->ll_extent_process_count;
1508                 io_extents->pp_extents[cur].pid = pid;
1509                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1510                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1511         }
1512
1513         for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1514              (i < (LL_HIST_MAX - 1)); i++);
1515         if (rw == 0) {
1516                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1517                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1518         } else {
1519                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1520                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1521         }
1522         spin_unlock(&sbi->ll_pp_extent_lock);
1523
1524         spin_lock(&sbi->ll_process_lock);
1525         /* Offset statistics */
1526         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1527                 if (process[i].rw_pid == pid) {
1528                         if (process[i].rw_last_file != file) {
1529                                 process[i].rw_range_start = pos;
1530                                 process[i].rw_last_file_pos = pos + count;
1531                                 process[i].rw_smallest_extent = count;
1532                                 process[i].rw_largest_extent = count;
1533                                 process[i].rw_offset = 0;
1534                                 process[i].rw_last_file = file;
1535                                 spin_unlock(&sbi->ll_process_lock);
1536                                 return;
1537                         }
1538                         if (process[i].rw_last_file_pos != pos) {
1539                                 *off_count =
1540                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1541                                 offset[*off_count].rw_op = process[i].rw_op;
1542                                 offset[*off_count].rw_pid = pid;
1543                                 offset[*off_count].rw_range_start =
1544                                         process[i].rw_range_start;
1545                                 offset[*off_count].rw_range_end =
1546                                         process[i].rw_last_file_pos;
1547                                 offset[*off_count].rw_smallest_extent =
1548                                         process[i].rw_smallest_extent;
1549                                 offset[*off_count].rw_largest_extent =
1550                                         process[i].rw_largest_extent;
1551                                 offset[*off_count].rw_offset =
1552                                         process[i].rw_offset;
1553                                 process[i].rw_op = rw;
1554                                 process[i].rw_range_start = pos;
1555                                 process[i].rw_smallest_extent = count;
1556                                 process[i].rw_largest_extent = count;
1557                                 process[i].rw_offset = pos -
1558                                         process[i].rw_last_file_pos;
1559                         }
1560                         if(process[i].rw_smallest_extent > count)
1561                                 process[i].rw_smallest_extent = count;
1562                         if(process[i].rw_largest_extent < count)
1563                                 process[i].rw_largest_extent = count;
1564                         process[i].rw_last_file_pos = pos + count;
1565                         spin_unlock(&sbi->ll_process_lock);
1566                         return;
1567                 }
1568         }
1569         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1570         process[*process_count].rw_pid = pid;
1571         process[*process_count].rw_op = rw;
1572         process[*process_count].rw_range_start = pos;
1573         process[*process_count].rw_last_file_pos = pos + count;
1574         process[*process_count].rw_smallest_extent = count;
1575         process[*process_count].rw_largest_extent = count;
1576         process[*process_count].rw_offset = 0;
1577         process[*process_count].rw_last_file = file;
1578         spin_unlock(&sbi->ll_process_lock);
1579 }
1580
1581 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1582 {
1583         struct timeval now;
1584         struct ll_sb_info *sbi = seq->private;
1585         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1586         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1587         int i;
1588
1589         do_gettimeofday(&now);
1590
1591         if (!sbi->ll_rw_stats_on) {
1592                 seq_printf(seq, "disabled\n"
1593                                 "write anything in this file to activate, "
1594                                 "then 0 or \"[D/d]isabled\" to deactivate\n");
1595                 return 0;
1596         }
1597         spin_lock(&sbi->ll_process_lock);
1598
1599         seq_printf(seq, "snapshot_time:         %lu.%lu (secs.usecs)\n",
1600                    now.tv_sec, now.tv_usec);
1601         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1602                    "R/W", "PID", "RANGE START", "RANGE END",
1603                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1604
1605         /* We stored the discontiguous offsets here; print them first */
1606         for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1607                 if (offset[i].rw_pid != 0)
1608                         seq_printf(seq,
1609                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1610                                    offset[i].rw_op == READ ? 'R' : 'W',
1611                                    offset[i].rw_pid,
1612                                    offset[i].rw_range_start,
1613                                    offset[i].rw_range_end,
1614                                    (unsigned long)offset[i].rw_smallest_extent,
1615                                    (unsigned long)offset[i].rw_largest_extent,
1616                                    offset[i].rw_offset);
1617         }
1618
1619         /* Then print the current offsets for each process */
1620         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1621                 if (process[i].rw_pid != 0)
1622                         seq_printf(seq,
1623                                    "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1624                                    process[i].rw_op == READ ? 'R' : 'W',
1625                                    process[i].rw_pid,
1626                                    process[i].rw_range_start,
1627                                    process[i].rw_last_file_pos,
1628                                    (unsigned long)process[i].rw_smallest_extent,
1629                                    (unsigned long)process[i].rw_largest_extent,
1630                                    process[i].rw_offset);
1631         }
1632         spin_unlock(&sbi->ll_process_lock);
1633
1634         return 0;
1635 }
1636
1637 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
1638                                             const char __user *buf,
1639                                             size_t len, loff_t *off)
1640 {
1641         struct seq_file *seq = file->private_data;
1642         struct ll_sb_info *sbi = seq->private;
1643         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1644         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1645         int value = 1, rc = 0;
1646
1647         if (len == 0)
1648                 return -EINVAL;
1649
1650         rc = lprocfs_write_helper(buf, len, &value);
1651
1652         if (rc < 0 && len < 16) {
1653                 char kernbuf[16];
1654
1655                 if (copy_from_user(kernbuf, buf, len))
1656                         return -EFAULT;
1657                 kernbuf[len] = 0;
1658
1659                 if (kernbuf[len - 1] == '\n')
1660                         kernbuf[len - 1] = 0;
1661
1662                 if (strcmp(kernbuf, "disabled") == 0 ||
1663                     strcmp(kernbuf, "Disabled") == 0)
1664                         value = 0;
1665         }
1666
1667         if (value == 0)
1668                 sbi->ll_rw_stats_on = 0;
1669         else
1670                 sbi->ll_rw_stats_on = 1;
1671
1672         spin_lock(&sbi->ll_process_lock);
1673         sbi->ll_offset_process_count = 0;
1674         sbi->ll_rw_offset_entry_count = 0;
1675         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1676                LL_PROCESS_HIST_MAX);
1677         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1678                LL_OFFSET_HIST_MAX);
1679         spin_unlock(&sbi->ll_process_lock);
1680
1681         return len;
1682 }
1683
1684 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1685 #endif /* LPROCFS */