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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2012, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  */
  31 #define DEBUG_SUBSYSTEM S_LLITE
  32
  33 #include <linux/version.h>
  34 #include <linux/user_namespace.h>
  35 #include <linux/uidgid.h>
  36
  37 #include <uapi/linux/lustre/lustre_param.h>
  38 #include <lprocfs_status.h>
  39 #include <obd_support.h>
  40
  41 #include "llite_internal.h"
  42 #include "vvp_internal.h"
  43
  44 static struct kobject *llite_kobj;
  45 static struct dentry *llite_root;
  46
  47 static void llite_kobj_release(struct kobject *kobj)
  48 {
  49         if (!IS_ERR_OR_NULL(llite_root)) {
  50                 debugfs_remove(llite_root);
  51                 llite_root = NULL;
  52         }
  53
  54         kfree(kobj);
  55 }
  56
  57 static struct kobj_type llite_kobj_ktype = {
  58         .release        = llite_kobj_release,
  59         .sysfs_ops      = &lustre_sysfs_ops,
  60 };
  61
  62 int llite_tunables_register(void)
  63 {
  64         int rc;
  65
  66         llite_kobj = kzalloc(sizeof(*llite_kobj), GFP_KERNEL);
  67         if (!llite_kobj)
  68                 return -ENOMEM;
  69
  70         llite_kobj->kset = lustre_kset;
  71         rc = kobject_init_and_add(llite_kobj, &llite_kobj_ktype,
  72                                   &lustre_kset->kobj, "%s", "llite");
  73         if (rc)
  74                 goto free_kobj;
  75
  76         llite_root = debugfs_create_dir("llite", debugfs_lustre_root);
  77         return 0;
  78
  79 free_kobj:
  80         kobject_put(llite_kobj);
  81         llite_kobj = NULL;
  82
  83         return rc;
  84 }
  85
  86 void llite_tunables_unregister(void)
  87 {
  88         kobject_put(llite_kobj);
  89         llite_kobj = NULL;
  90 }
  91
  92 /* <debugfs>/lustre/llite mount point registration */
  93 static const struct file_operations ll_rw_extents_stats_fops;
  94 static const struct file_operations ll_rw_extents_stats_pp_fops;
  95 static const struct file_operations ll_rw_offset_stats_fops;
  96
  97 /**
  98  * ll_stats_pid_write() - Determine if stats collection should be enabled
  99  * @buf: Buffer containing the data written
 100  * @len: Number of bytes in the buffer
 101  *
 102  * Several proc files begin collecting stats when a value is written, and stop
 103  * collecting when either '0' or 'disable' is written. This function checks the
 104  * written value to see if collection should be enabled or disabled.
 105  *
 106  * Return: If '0' or 'disable' is provided, 0 is returned. If the text
 107  * equivalent of a number is written, that number is returned. Otherwise,
 108  * 1 is returned. Non-zero return values indicate collection should be enabled.
 109  */
 110 static s64 ll_stats_pid_write(const char __user *buf, size_t len)
 111 {
 112         unsigned long long value = 1;
 113         char kernbuf[16];
 114         int rc;
 115
 116         rc = kstrtoull_from_user(buf, len, 0, &value);
 117         if (rc < 0 && len < sizeof(kernbuf)) {
 118                 if (copy_from_user(kernbuf, buf, len))
 119                         return -EFAULT;
 120                 kernbuf[len] = 0;
 121
 122                 if (kernbuf[len - 1] == '\n')
 123                         kernbuf[len - 1] = 0;
 124
 125                 if (strncasecmp(kernbuf, "disable", 7) == 0)
 126                         value = 0;
 127         }
 128
 129         return value;
 130 }
 131
 132 static ssize_t blocksize_show(struct kobject *kobj, struct attribute *attr,
 133                               char *buf)
 134 {
 135         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 136                                               ll_kset.kobj);
 137         struct obd_statfs osfs;
 138         int rc;
 139
 140         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
 141         if (rc)
 142                 return rc;
 143
 144         return sprintf(buf, "%u\n", osfs.os_bsize);
 145 }
 146 LUSTRE_RO_ATTR(blocksize);
 147
 148 static ssize_t stat_blocksize_show(struct kobject *kobj, struct attribute *attr,
 149                                    char *buf)
 150 {
 151         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 152                                               ll_kset.kobj);
 153
 154         return sprintf(buf, "%u\n", sbi->ll_stat_blksize);
 155 }
 156
 157 static ssize_t stat_blocksize_store(struct kobject *kobj,
 158                                     struct attribute *attr,
 159                                     const char *buffer,
 160                                     size_t count)
 161 {
 162         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 163                                               ll_kset.kobj);
 164         unsigned int val;
 165         int rc;
 166
 167         rc = kstrtouint(buffer, 10, &val);
 168         if (rc)
 169                 return rc;
 170
 171         if (val != 0 && (val < PAGE_SIZE || (val & (val - 1))) != 0)
 172                 return -ERANGE;
 173
 174         sbi->ll_stat_blksize = val;
 175
 176         return count;
 177 }
 178 LUSTRE_RW_ATTR(stat_blocksize);
 179
 180 static ssize_t kbytestotal_show(struct kobject *kobj, struct attribute *attr,
 181                                 char *buf)
 182 {
 183         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 184                                               ll_kset.kobj);
 185         struct obd_statfs osfs;
 186         u32 blk_size;
 187         u64 result;
 188         int rc;
 189
 190         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
 191         if (rc)
 192                 return rc;
 193
 194         blk_size = osfs.os_bsize >> 10;
 195         result = osfs.os_blocks;
 196
 197         while (blk_size >>= 1)
 198                 result <<= 1;
 199
 200         return sprintf(buf, "%llu\n", result);
 201 }
 202 LUSTRE_RO_ATTR(kbytestotal);
 203
 204 static ssize_t kbytesfree_show(struct kobject *kobj, struct attribute *attr,
 205                                char *buf)
 206 {
 207         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 208                                               ll_kset.kobj);
 209         struct obd_statfs osfs;
 210         u32 blk_size;
 211         u64 result;
 212         int rc;
 213
 214         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
 215         if (rc)
 216                 return rc;
 217
 218         blk_size = osfs.os_bsize >> 10;
 219         result = osfs.os_bfree;
 220
 221         while (blk_size >>= 1)
 222                 result <<= 1;
 223
 224         return sprintf(buf, "%llu\n", result);
 225 }
 226 LUSTRE_RO_ATTR(kbytesfree);
 227
 228 static ssize_t kbytesavail_show(struct kobject *kobj, struct attribute *attr,
 229                                 char *buf)
 230 {
 231         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 232                                               ll_kset.kobj);
 233         struct obd_statfs osfs;
 234         u32 blk_size;
 235         u64 result;
 236         int rc;
 237
 238         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
 239         if (rc)
 240                 return rc;
 241
 242         blk_size = osfs.os_bsize >> 10;
 243         result = osfs.os_bavail;
 244
 245         while (blk_size >>= 1)
 246                 result <<= 1;
 247
 248         return sprintf(buf, "%llu\n", result);
 249 }
 250 LUSTRE_RO_ATTR(kbytesavail);
 251
 252 static ssize_t filestotal_show(struct kobject *kobj, struct attribute *attr,
 253                                char *buf)
 254 {
 255         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 256                                               ll_kset.kobj);
 257         struct obd_statfs osfs;
 258         int rc;
 259
 260         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
 261         if (rc)
 262                 return rc;
 263
 264         return sprintf(buf, "%llu\n", osfs.os_files);
 265 }
 266 LUSTRE_RO_ATTR(filestotal);
 267
 268 static ssize_t filesfree_show(struct kobject *kobj, struct attribute *attr,
 269                               char *buf)
 270 {
 271         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 272                                               ll_kset.kobj);
 273         struct obd_statfs osfs;
 274         int rc;
 275
 276         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
 277         if (rc)
 278                 return rc;
 279
 280         return sprintf(buf, "%llu\n", osfs.os_ffree);
 281 }
 282 LUSTRE_RO_ATTR(filesfree);
 283
 284 static ssize_t client_type_show(struct kobject *kobj, struct attribute *attr,
 285                                 char *buf)
 286 {
 287         return sprintf(buf, "local client\n");
 288 }
 289 LUSTRE_RO_ATTR(client_type);
 290
 291 LUSTRE_RW_ATTR(foreign_symlink_enable);
 292
 293 LUSTRE_RW_ATTR(foreign_symlink_prefix);
 294
 295 LUSTRE_RW_ATTR(foreign_symlink_upcall);
 296
 297 LUSTRE_WO_ATTR(foreign_symlink_upcall_info);
 298
 299 static ssize_t fstype_show(struct kobject *kobj, struct attribute *attr,
 300                            char *buf)
 301 {
 302         return sprintf(buf, "lustre\n");
 303 }
 304 LUSTRE_RO_ATTR(fstype);
 305
 306 static ssize_t uuid_show(struct kobject *kobj, struct attribute *attr,
 307                          char *buf)
 308 {
 309         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 310                                               ll_kset.kobj);
 311
 312         return sprintf(buf, "%s\n", sbi->ll_sb_uuid.uuid);
 313 }
 314 LUSTRE_RO_ATTR(uuid);
 315
 316 static int ll_site_stats_seq_show(struct seq_file *m, void *v)
 317 {
 318         struct super_block *sb = m->private;
 319
 320         /*
 321          * See description of statistical counters in struct cl_site, and
 322          * struct lu_site.
 323          */
 324         return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site), m);
 325 }
 326
 327 LDEBUGFS_SEQ_FOPS_RO(ll_site_stats);
 328
 329 static ssize_t max_read_ahead_mb_show(struct kobject *kobj,
 330                                       struct attribute *attr, char *buf)
 331 {
 332         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 333                                               ll_kset.kobj);
 334
 335         return scnprintf(buf, PAGE_SIZE, "%lu\n",
 336                         PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages));
 337 }
 338
 339 static ssize_t max_read_ahead_mb_store(struct kobject *kobj,
 340                                        struct attribute *attr,
 341                                        const char *buffer, size_t count)
 342 {
 343         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 344                                               ll_kset.kobj);
 345         u64 ra_max_mb, pages_number;
 346         int rc;
 347
 348         rc = sysfs_memparse(buffer, count, &ra_max_mb, "MiB");
 349         if (rc)
 350                 return rc;
 351
 352         pages_number = round_up(ra_max_mb, 1024 * 1024) >> PAGE_SHIFT;
 353         CDEBUG(D_INFO, "%s: set max_read_ahead_mb=%llu (%llu pages)\n",
 354                sbi->ll_fsname, PAGES_TO_MiB(pages_number), pages_number);
 355         if (pages_number > cfs_totalram_pages() / 2) {
 356                 /* 1/2 of RAM */
 357                 CERROR("%s: cannot set max_read_ahead_mb=%llu > totalram/2=%luMB\n",
 358                        sbi->ll_fsname, PAGES_TO_MiB(pages_number),
 359                        PAGES_TO_MiB(cfs_totalram_pages() / 2));
 360                 return -ERANGE;
 361         }
 362
 363         spin_lock(&sbi->ll_lock);
 364         sbi->ll_ra_info.ra_max_pages = pages_number;
 365         spin_unlock(&sbi->ll_lock);
 366
 367         return count;
 368 }
 369 LUSTRE_RW_ATTR(max_read_ahead_mb);
 370
 371 static ssize_t max_read_ahead_per_file_mb_show(struct kobject *kobj,
 372                                                struct attribute *attr,
 373                                                char *buf)
 374 {
 375         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 376                                               ll_kset.kobj);
 377
 378         return scnprintf(buf, PAGE_SIZE, "%lu\n",
 379                          PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages_per_file));
 380 }
 381
 382 static ssize_t max_read_ahead_per_file_mb_store(struct kobject *kobj,
 383                                                 struct attribute *attr,
 384                                                 const char *buffer,
 385                                                 size_t count)
 386 {
 387         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 388                                               ll_kset.kobj);
 389         u64 ra_max_file_mb, pages_number;
 390         int rc;
 391
 392         rc = sysfs_memparse(buffer, count, &ra_max_file_mb, "MiB");
 393         if (rc)
 394                 return rc;
 395
 396         pages_number = round_up(ra_max_file_mb, 1024 * 1024) >> PAGE_SHIFT;
 397         if (pages_number > sbi->ll_ra_info.ra_max_pages) {
 398                 CERROR("%s: cannot set max_read_ahead_per_file_mb=%llu > max_read_ahead_mb=%lu\n",
 399                        sbi->ll_fsname, PAGES_TO_MiB(pages_number),
 400                        PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages));
 401                 return -ERANGE;
 402         }
 403
 404         spin_lock(&sbi->ll_lock);
 405         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 406         spin_unlock(&sbi->ll_lock);
 407
 408         return count;
 409 }
 410 LUSTRE_RW_ATTR(max_read_ahead_per_file_mb);
 411
 412 static ssize_t max_read_ahead_whole_mb_show(struct kobject *kobj,
 413                                             struct attribute *attr, char *buf)
 414 {
 415         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 416                                               ll_kset.kobj);
 417
 418         return scnprintf(buf, PAGE_SIZE, "%lu\n",
 419                          PAGES_TO_MiB(sbi->ll_ra_info.ra_max_read_ahead_whole_pages));
 420 }
 421
 422 static ssize_t max_read_ahead_whole_mb_store(struct kobject *kobj,
 423                                              struct attribute *attr,
 424                                              const char *buffer, size_t count)
 425 {
 426         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 427                                               ll_kset.kobj);
 428         u64 ra_max_whole_mb, pages_number;
 429         int rc;
 430
 431         rc = sysfs_memparse(buffer, count, &ra_max_whole_mb, "MiB");
 432         if (rc)
 433                 return rc;
 434
 435         pages_number = round_up(ra_max_whole_mb, 1024 * 1024) >> PAGE_SHIFT;
 436         /* Cap this at the current max readahead window size, the readahead
 437          * algorithm does this anyway so it's pointless to set it larger.
 438          */
 439         if (pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
 440                 CERROR("%s: cannot set max_read_ahead_whole_mb=%llu > max_read_ahead_per_file_mb=%lu\n",
 441                        sbi->ll_fsname, PAGES_TO_MiB(pages_number),
 442                        PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages_per_file));
 443
 444                 return -ERANGE;
 445         }
 446
 447         spin_lock(&sbi->ll_lock);
 448         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 449         spin_unlock(&sbi->ll_lock);
 450
 451         return count;
 452 }
 453 LUSTRE_RW_ATTR(max_read_ahead_whole_mb);
 454
 455 static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v)
 456 {
 457         struct super_block     *sb    = m->private;
 458         struct ll_sb_info      *sbi   = ll_s2sbi(sb);
 459         struct cl_client_cache *cache = sbi->ll_cache;
 460         struct ll_ra_info *ra = &sbi->ll_ra_info;
 461         long max_cached_mb;
 462         long unused_mb;
 463
 464         mutex_lock(&cache->ccc_max_cache_mb_lock);
 465         max_cached_mb = PAGES_TO_MiB(cache->ccc_lru_max);
 466         unused_mb = PAGES_TO_MiB(atomic_long_read(&cache->ccc_lru_left));
 467         mutex_unlock(&cache->ccc_max_cache_mb_lock);
 468
 469         seq_printf(m, "users: %d\n"
 470                       "max_cached_mb: %ld\n"
 471                       "used_mb: %ld\n"
 472                       "unused_mb: %ld\n"
 473                       "reclaim_count: %u\n"
 474                       "max_read_ahead_mb: %lu\n"
 475                       "used_read_ahead_mb: %d\n",
 476                    atomic_read(&cache->ccc_users),
 477                    max_cached_mb,
 478                    max_cached_mb - unused_mb,
 479                    unused_mb,
 480                    cache->ccc_lru_shrinkers,
 481                    PAGES_TO_MiB(ra->ra_max_pages),
 482                    PAGES_TO_MiB(atomic_read(&ra->ra_cur_pages)));
 483         return 0;
 484 }
 485
 486 static ssize_t ll_max_cached_mb_seq_write(struct file *file,
 487                                           const char __user *buffer,
 488                                           size_t count, loff_t *off)
 489 {
 490         struct seq_file *m = file->private_data;
 491         struct super_block *sb = m->private;
 492         struct ll_sb_info *sbi = ll_s2sbi(sb);
 493         struct cl_client_cache *cache = sbi->ll_cache;
 494         struct lu_env *env;
 495         long diff = 0;
 496         long nrpages = 0;
 497         __u16 refcheck;
 498         u64 pages_number;
 499         int rc;
 500         char kernbuf[128], *ptr;
 501
 502         ENTRY;
 503         if (count >= sizeof(kernbuf))
 504                 RETURN(-EINVAL);
 505
 506         if (copy_from_user(kernbuf, buffer, count))
 507                 RETURN(-EFAULT);
 508         kernbuf[count] = '\0';
 509
 510         ptr = lprocfs_find_named_value(kernbuf, "max_cached_mb:", &count);
 511         rc = sysfs_memparse(ptr, count, &pages_number, "MiB");
 512         if (rc)
 513                 RETURN(rc);
 514
 515         pages_number >>= PAGE_SHIFT;
 516
 517         if (pages_number < 0 || pages_number > cfs_totalram_pages()) {
 518                 CERROR("%s: can't set max cache more than %lu MB\n",
 519                        sbi->ll_fsname,
 520                        PAGES_TO_MiB(cfs_totalram_pages()));
 521                 RETURN(-ERANGE);
 522         }
 523         /* Allow enough cache so clients can make well-formed RPCs */
 524         pages_number = max_t(long, pages_number, PTLRPC_MAX_BRW_PAGES);
 525
 526         mutex_lock(&cache->ccc_max_cache_mb_lock);
 527         diff = pages_number - cache->ccc_lru_max;
 528
 529         /* easy - add more LRU slots. */
 530         if (diff >= 0) {
 531                 atomic_long_add(diff, &cache->ccc_lru_left);
 532                 GOTO(out, rc = 0);
 533         }
 534
 535         env = cl_env_get(&refcheck);
 536         if (IS_ERR(env))
 537                 GOTO(out_unlock, rc = PTR_ERR(env));
 538
 539         diff = -diff;
 540         while (diff > 0) {
 541                 long tmp;
 542
 543                 /* reduce LRU budget from free slots. */
 544                 do {
 545                         long lru_left_old, lru_left_new, lru_left_ret;
 546
 547                         lru_left_old = atomic_long_read(&cache->ccc_lru_left);
 548                         if (lru_left_old == 0)
 549                                 break;
 550
 551                         lru_left_new = lru_left_old > diff ?
 552                                         lru_left_old - diff : 0;
 553                         lru_left_ret =
 554                                 atomic_long_cmpxchg(&cache->ccc_lru_left,
 555                                                     lru_left_old,
 556                                                     lru_left_new);
 557                         if (likely(lru_left_old == lru_left_ret)) {
 558                                 diff -= lru_left_old - lru_left_new;
 559                                 nrpages += lru_left_old - lru_left_new;
 560                                 break;
 561                         }
 562                 } while (1);
 563
 564                 if (diff <= 0)
 565                         break;
 566
 567                 if (sbi->ll_dt_exp == NULL) { /* being initialized */
 568                         rc = -ENODEV;
 569                         break;
 570                 }
 571
 572                 /* Request extra free slots to avoid them all being used
 573                  * by other processes before this can continue shrinking.
 574                  */
 575                 tmp = diff + min_t(long, diff, MiB_TO_PAGES(1024));
 576                 /* difficult - have to ask OSCs to drop LRU slots. */
 577                 rc = obd_set_info_async(env, sbi->ll_dt_exp,
 578                                 sizeof(KEY_CACHE_LRU_SHRINK),
 579                                 KEY_CACHE_LRU_SHRINK,
 580                                 sizeof(tmp), &tmp, NULL);
 581                 if (rc < 0)
 582                         break;
 583         }
 584         cl_env_put(env, &refcheck);
 585
 586 out:
 587         if (rc >= 0) {
 588                 cache->ccc_lru_max = pages_number;
 589                 rc = count;
 590         } else {
 591                 atomic_long_add(nrpages, &cache->ccc_lru_left);
 592         }
 593 out_unlock:
 594         mutex_unlock(&cache->ccc_max_cache_mb_lock);
 595         return rc;
 596 }
 597 LDEBUGFS_SEQ_FOPS(ll_max_cached_mb);
 598
 599 static ssize_t checksums_show(struct kobject *kobj, struct attribute *attr,
 600                               char *buf)
 601 {
 602         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 603                                               ll_kset.kobj);
 604
 605         return sprintf(buf, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 606 }
 607
 608 static ssize_t checksums_store(struct kobject *kobj, struct attribute *attr,
 609                                const char *buffer, size_t count)
 610 {
 611         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 612                                               ll_kset.kobj);
 613         bool val;
 614         int tmp;
 615         int rc;
 616
 617         if (!sbi->ll_dt_exp)
 618                 /* Not set up yet */
 619                 return -EAGAIN;
 620
 621         rc = kstrtobool(buffer, &val);
 622         if (rc)
 623                 return rc;
 624         if (val)
 625                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 626         else
 627                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 628         tmp = val;
 629
 630         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 631                                 KEY_CHECKSUM, sizeof(tmp), &tmp, NULL);
 632         if (rc)
 633                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 634
 635         return count;
 636 }
 637 LUSTRE_RW_ATTR(checksums);
 638
 639 LUSTRE_ATTR(checksum_pages, 0644, checksums_show, checksums_store);
 640
 641 static ssize_t ll_rd_track_id(struct kobject *kobj, char *buf,
 642                               enum stats_track_type type)
 643 {
 644         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 645                                               ll_kset.kobj);
 646
 647         if (sbi->ll_stats_track_type == type)
 648                 return sprintf(buf, "%d\n", sbi->ll_stats_track_id);
 649         else if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 650                 return sprintf(buf, "0 (all)\n");
 651
 652         return sprintf(buf, "untracked\n");
 653 }
 654
 655 static ssize_t ll_wr_track_id(struct kobject *kobj, const char *buffer,
 656                               size_t count, enum stats_track_type type)
 657 {
 658         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 659                                               ll_kset.kobj);
 660         unsigned long pid;
 661         int rc;
 662
 663         rc = kstrtoul(buffer, 10, &pid);
 664         if (rc)
 665                 return rc;
 666
 667         sbi->ll_stats_track_id = pid;
 668         if (pid == 0)
 669                 sbi->ll_stats_track_type = STATS_TRACK_ALL;
 670         else
 671                 sbi->ll_stats_track_type = type;
 672         lprocfs_clear_stats(sbi->ll_stats);
 673         return count;
 674 }
 675
 676 static ssize_t stats_track_pid_show(struct kobject *kobj,
 677                                     struct attribute *attr,
 678                                     char *buf)
 679 {
 680         return ll_rd_track_id(kobj, buf, STATS_TRACK_PID);
 681 }
 682
 683 static ssize_t stats_track_pid_store(struct kobject *kobj,
 684                                      struct attribute *attr,
 685                                      const char *buffer,
 686                                      size_t count)
 687 {
 688         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PID);
 689 }
 690 LUSTRE_RW_ATTR(stats_track_pid);
 691
 692 static ssize_t stats_track_ppid_show(struct kobject *kobj,
 693                                      struct attribute *attr,
 694                                      char *buf)
 695 {
 696         return ll_rd_track_id(kobj, buf, STATS_TRACK_PPID);
 697 }
 698
 699 static ssize_t stats_track_ppid_store(struct kobject *kobj,
 700                                       struct attribute *attr,
 701                                       const char *buffer,
 702                                       size_t count)
 703 {
 704         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PPID);
 705 }
 706 LUSTRE_RW_ATTR(stats_track_ppid);
 707
 708 static ssize_t stats_track_gid_show(struct kobject *kobj,
 709                                     struct attribute *attr,
 710                                     char *buf)
 711 {
 712         return ll_rd_track_id(kobj, buf, STATS_TRACK_GID);
 713 }
 714
 715 static ssize_t stats_track_gid_store(struct kobject *kobj,
 716                                      struct attribute *attr,
 717                                      const char *buffer,
 718                                      size_t count)
 719 {
 720         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_GID);
 721 }
 722 LUSTRE_RW_ATTR(stats_track_gid);
 723
 724 static ssize_t statahead_running_max_show(struct kobject *kobj,
 725                                           struct attribute *attr,
 726                                           char *buf)
 727 {
 728         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 729                                               ll_kset.kobj);
 730
 731         return scnprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_sa_running_max);
 732 }
 733
 734 static ssize_t statahead_running_max_store(struct kobject *kobj,
 735                                            struct attribute *attr,
 736                                            const char *buffer,
 737                                            size_t count)
 738 {
 739         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 740                                               ll_kset.kobj);
 741         unsigned long val;
 742         int rc;
 743
 744         rc = kstrtoul(buffer, 0, &val);
 745         if (rc)
 746                 return rc;
 747
 748         if (val <= LL_SA_RUNNING_MAX) {
 749                 sbi->ll_sa_running_max = val;
 750                 return count;
 751         }
 752
 753         CERROR("Bad statahead_running_max value %lu. Valid values "
 754                "are in the range [0, %d]\n", val, LL_SA_RUNNING_MAX);
 755
 756         return -ERANGE;
 757 }
 758 LUSTRE_RW_ATTR(statahead_running_max);
 759
 760 static ssize_t statahead_max_show(struct kobject *kobj,
 761                                   struct attribute *attr,
 762                                   char *buf)
 763 {
 764         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 765                                               ll_kset.kobj);
 766
 767         return sprintf(buf, "%u\n", sbi->ll_sa_max);
 768 }
 769
 770 static ssize_t statahead_max_store(struct kobject *kobj,
 771                                    struct attribute *attr,
 772                                    const char *buffer,
 773                                    size_t count)
 774 {
 775         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 776                                               ll_kset.kobj);
 777         unsigned long val;
 778         int rc;
 779
 780         rc = kstrtoul(buffer, 0, &val);
 781         if (rc)
 782                 return rc;
 783
 784         if (val <= LL_SA_RPC_MAX)
 785                 sbi->ll_sa_max = val;
 786         else
 787                 CERROR("Bad statahead_max value %lu. Valid values are in the range [0, %d]\n",
 788                        val, LL_SA_RPC_MAX);
 789
 790         return count;
 791 }
 792 LUSTRE_RW_ATTR(statahead_max);
 793
 794 static ssize_t statahead_agl_show(struct kobject *kobj,
 795                                   struct attribute *attr,
 796                                   char *buf)
 797 {
 798         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 799                                               ll_kset.kobj);
 800
 801         return sprintf(buf, "%u\n", sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
 802 }
 803
 804 static ssize_t statahead_agl_store(struct kobject *kobj,
 805                                    struct attribute *attr,
 806                                    const char *buffer,
 807                                    size_t count)
 808 {
 809         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 810                                               ll_kset.kobj);
 811         bool val;
 812         int rc;
 813
 814         rc = kstrtobool(buffer, &val);
 815         if (rc)
 816                 return rc;
 817
 818         if (val)
 819                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 820         else
 821                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
 822
 823         return count;
 824 }
 825 LUSTRE_RW_ATTR(statahead_agl);
 826
 827 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
 828 {
 829         struct super_block *sb = m->private;
 830         struct ll_sb_info *sbi = ll_s2sbi(sb);
 831
 832         seq_printf(m, "statahead total: %u\n"
 833                       "statahead wrong: %u\n"
 834                       "agl total: %u\n",
 835                    atomic_read(&sbi->ll_sa_total),
 836                    atomic_read(&sbi->ll_sa_wrong),
 837                    atomic_read(&sbi->ll_agl_total));
 838         return 0;
 839 }
 840
 841 LDEBUGFS_SEQ_FOPS_RO(ll_statahead_stats);
 842
 843 static ssize_t lazystatfs_show(struct kobject *kobj,
 844                                struct attribute *attr,
 845                                char *buf)
 846 {
 847         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 848                                               ll_kset.kobj);
 849
 850         return sprintf(buf, "%u\n", (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 851 }
 852
 853 static ssize_t lazystatfs_store(struct kobject *kobj,
 854                                 struct attribute *attr,
 855                                 const char *buffer,
 856                                 size_t count)
 857 {
 858         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 859                                               ll_kset.kobj);
 860         bool val;
 861         int rc;
 862
 863         rc = kstrtobool(buffer, &val);
 864         if (rc)
 865                 return rc;
 866
 867         if (val)
 868                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 869         else
 870                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 871
 872         return count;
 873 }
 874 LUSTRE_RW_ATTR(lazystatfs);
 875
 876 static ssize_t statfs_max_age_show(struct kobject *kobj, struct attribute *attr,
 877                                    char *buf)
 878 {
 879         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 880                                               ll_kset.kobj);
 881
 882         return scnprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_statfs_max_age);
 883 }
 884
 885 static ssize_t statfs_max_age_store(struct kobject *kobj,
 886                                     struct attribute *attr, const char *buffer,
 887                                     size_t count)
 888 {
 889         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 890                                               ll_kset.kobj);
 891         unsigned int val;
 892         int rc;
 893
 894         rc = kstrtouint(buffer, 10, &val);
 895         if (rc)
 896                 return rc;
 897         if (val > OBD_STATFS_CACHE_MAX_AGE)
 898                 return -EINVAL;
 899
 900         sbi->ll_statfs_max_age = val;
 901
 902         return count;
 903 }
 904 LUSTRE_RW_ATTR(statfs_max_age);
 905
 906 static ssize_t max_easize_show(struct kobject *kobj,
 907                                struct attribute *attr,
 908                                char *buf)
 909 {
 910         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 911                                               ll_kset.kobj);
 912         unsigned int ealen;
 913         int rc;
 914
 915         rc = ll_get_max_mdsize(sbi, &ealen);
 916         if (rc)
 917                 return rc;
 918
 919         /* Limit xattr size returned to userspace based on kernel maximum */
 920         return scnprintf(buf, PAGE_SIZE, "%u\n",
 921                          ealen > XATTR_SIZE_MAX ? XATTR_SIZE_MAX : ealen);
 922 }
 923 LUSTRE_RO_ATTR(max_easize);
 924
 925 /**
 926  * Get default_easize.
 927  *
 928  * \see client_obd::cl_default_mds_easize
 929  *
 930  * \param[in] m         seq_file handle
 931  * \param[in] v         unused for single entry
 932  *
 933  * \retval 0            on success
 934  * \retval negative     negated errno on failure
 935  */
 936 static ssize_t default_easize_show(struct kobject *kobj,
 937                                    struct attribute *attr,
 938                                    char *buf)
 939 {
 940         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 941                                               ll_kset.kobj);
 942         unsigned int ealen;
 943         int rc;
 944
 945         rc = ll_get_default_mdsize(sbi, &ealen);
 946         if (rc)
 947                 return rc;
 948
 949         /* Limit xattr size returned to userspace based on kernel maximum */
 950         return scnprintf(buf, PAGE_SIZE, "%u\n",
 951                          ealen > XATTR_SIZE_MAX ? XATTR_SIZE_MAX : ealen);
 952 }
 953
 954 /**
 955  * Set default_easize.
 956  *
 957  * Range checking on the passed value is handled by
 958  * ll_set_default_mdsize().
 959  *
 960  * \see client_obd::cl_default_mds_easize
 961  *
 962  * \param[in] file      proc file
 963  * \param[in] buffer    string passed from user space
 964  * \param[in] count     \a buffer length
 965  * \param[in] off       unused for single entry
 966  *
 967  * \retval positive     \a count on success
 968  * \retval negative     negated errno on failure
 969  */
 970 static ssize_t default_easize_store(struct kobject *kobj,
 971                                     struct attribute *attr,
 972                                     const char *buffer,
 973                                     size_t count)
 974 {
 975         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 976                                               ll_kset.kobj);
 977         unsigned int val;
 978         int rc;
 979
 980         if (count == 0)
 981                 return 0;
 982
 983         rc = kstrtouint(buffer, 10, &val);
 984         if (rc)
 985                 return rc;
 986
 987         rc = ll_set_default_mdsize(sbi, val);
 988         if (rc)
 989                 return rc;
 990
 991         return count;
 992 }
 993 LUSTRE_RW_ATTR(default_easize);
 994
 995 static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
 996 {
 997         const char *const str[] = LL_SBI_FLAGS;
 998         struct super_block *sb = m->private;
 999         int flags = ll_s2sbi(sb)->ll_flags;
1000         int i = 0;
1001
1002         while (flags != 0) {
1003                 if (ARRAY_SIZE(str) <= i) {
1004                         CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
1005                                 "flags please.\n", ll_s2sbi(sb)->ll_fsname);
1006                         return -EINVAL;
1007                 }
1008
1009                 if (flags & 0x1)
1010                         seq_printf(m, "%s ", str[i]);
1011                 flags >>= 1;
1012                 ++i;
1013         }
1014         seq_printf(m, "\b\n");
1015         return 0;
1016 }
1017
1018 LDEBUGFS_SEQ_FOPS_RO(ll_sbi_flags);
1019
1020 static ssize_t xattr_cache_show(struct kobject *kobj,
1021                                 struct attribute *attr,
1022                                 char *buf)
1023 {
1024         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1025                                               ll_kset.kobj);
1026
1027         return sprintf(buf, "%u\n", sbi->ll_xattr_cache_enabled);
1028 }
1029
1030 static ssize_t xattr_cache_store(struct kobject *kobj,
1031                                  struct attribute *attr,
1032                                  const char *buffer,
1033                                  size_t count)
1034 {
1035         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1036                                               ll_kset.kobj);
1037         bool val;
1038         int rc;
1039
1040         rc = kstrtobool(buffer, &val);
1041         if (rc)
1042                 return rc;
1043
1044         if (val && !(sbi->ll_flags & LL_SBI_XATTR_CACHE))
1045                 return -ENOTSUPP;
1046
1047         sbi->ll_xattr_cache_enabled = val;
1048         sbi->ll_xattr_cache_set = 1;
1049
1050         return count;
1051 }
1052 LUSTRE_RW_ATTR(xattr_cache);
1053
1054 static ssize_t tiny_write_show(struct kobject *kobj,
1055                                struct attribute *attr,
1056                                char *buf)
1057 {
1058         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1059                                               ll_kset.kobj);
1060
1061         return sprintf(buf, "%u\n", !!(sbi->ll_flags & LL_SBI_TINY_WRITE));
1062 }
1063
1064 static ssize_t tiny_write_store(struct kobject *kobj,
1065                                 struct attribute *attr,
1066                                 const char *buffer,
1067                                 size_t count)
1068 {
1069         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1070                                               ll_kset.kobj);
1071         bool val;
1072         int rc;
1073
1074         rc = kstrtobool(buffer, &val);
1075         if (rc)
1076                 return rc;
1077
1078         spin_lock(&sbi->ll_lock);
1079         if (val)
1080                 sbi->ll_flags |= LL_SBI_TINY_WRITE;
1081         else
1082                 sbi->ll_flags &= ~LL_SBI_TINY_WRITE;
1083         spin_unlock(&sbi->ll_lock);
1084
1085         return count;
1086 }
1087 LUSTRE_RW_ATTR(tiny_write);
1088
1089 static ssize_t max_read_ahead_async_active_show(struct kobject *kobj,
1090                                                struct attribute *attr,
1091                                                char *buf)
1092 {
1093         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1094                                               ll_kset.kobj);
1095
1096         return scnprintf(buf, PAGE_SIZE, "%u\n",
1097                          sbi->ll_ra_info.ra_async_max_active);
1098 }
1099
1100 static ssize_t max_read_ahead_async_active_store(struct kobject *kobj,
1101                                                  struct attribute *attr,
1102                                                  const char *buffer,
1103                                                  size_t count)
1104 {
1105         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1106                                               ll_kset.kobj);
1107         unsigned int val;
1108         int rc;
1109
1110         rc = kstrtouint(buffer, 10, &val);
1111         if (rc)
1112                 return rc;
1113
1114         /**
1115          * It doesn't make any sense to make it exceed what
1116          * workqueue could acutally support. This can easily
1117          * over subscripe the cores but Lustre internally
1118          * throttles to avoid those impacts.
1119          */
1120         if (val > WQ_UNBOUND_MAX_ACTIVE) {
1121                 CERROR("%s: cannot set max_read_ahead_async_active=%u larger than %u\n",
1122                        sbi->ll_fsname, val, WQ_UNBOUND_MAX_ACTIVE);
1123                 return -ERANGE;
1124         }
1125
1126         spin_lock(&sbi->ll_lock);
1127         sbi->ll_ra_info.ra_async_max_active = val;
1128         spin_unlock(&sbi->ll_lock);
1129
1130         return count;
1131 }
1132 LUSTRE_RW_ATTR(max_read_ahead_async_active);
1133
1134 static ssize_t read_ahead_async_file_threshold_mb_show(struct kobject *kobj,
1135                                                        struct attribute *attr,
1136                                                        char *buf)
1137 {
1138         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1139                                               ll_kset.kobj);
1140
1141         return scnprintf(buf, PAGE_SIZE, "%lu\n", PAGES_TO_MiB(
1142                          sbi->ll_ra_info.ra_async_pages_per_file_threshold));
1143 }
1144
1145 static ssize_t
1146 read_ahead_async_file_threshold_mb_store(struct kobject *kobj,
1147                                          struct attribute *attr,
1148                                          const char *buffer, size_t count)
1149 {
1150         unsigned long pages_number;
1151         unsigned long max_ra_per_file;
1152         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1153                                               ll_kset.kobj);
1154         int rc;
1155
1156         rc = kstrtoul(buffer, 10, &pages_number);
1157         if (rc)
1158                 return rc;
1159
1160         pages_number = MiB_TO_PAGES(pages_number);
1161         max_ra_per_file = sbi->ll_ra_info.ra_max_pages_per_file;
1162         if (pages_number < 0 || pages_number > max_ra_per_file) {
1163                 CERROR("%s: can't set read_ahead_async_file_threshold_mb=%lu > "
1164                        "max_read_readahead_per_file_mb=%lu\n", sbi->ll_fsname,
1165                        PAGES_TO_MiB(pages_number),
1166                        PAGES_TO_MiB(max_ra_per_file));
1167                 return -ERANGE;
1168         }
1169         sbi->ll_ra_info.ra_async_pages_per_file_threshold = pages_number;
1170
1171         return count;
1172 }
1173 LUSTRE_RW_ATTR(read_ahead_async_file_threshold_mb);
1174
1175 static ssize_t read_ahead_range_kb_show(struct kobject *kobj,
1176                                         struct attribute *attr,char *buf)
1177 {
1178         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1179                                               ll_kset.kobj);
1180
1181         return snprintf(buf, PAGE_SIZE, "%lu\n",
1182                         sbi->ll_ra_info.ra_range_pages << (PAGE_SHIFT - 10));
1183 }
1184
1185 static ssize_t
1186 read_ahead_range_kb_store(struct kobject *kobj,
1187                                struct attribute *attr,
1188                                const char *buffer, size_t count)
1189 {
1190         unsigned long pages_number;
1191         unsigned long max_ra_per_file;
1192         u64 val;
1193         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1194                                               ll_kset.kobj);
1195         int rc;
1196
1197         rc = sysfs_memparse(buffer, count, &val, "KiB");
1198         if (rc < 0)
1199                 return rc;
1200
1201         pages_number = val >> PAGE_SHIFT;
1202         /* Disable mmap range read */
1203         if (pages_number == 0)
1204                 goto out;
1205
1206         max_ra_per_file = sbi->ll_ra_info.ra_max_pages_per_file;
1207         if (pages_number > max_ra_per_file ||
1208             pages_number < RA_MIN_MMAP_RANGE_PAGES)
1209                 return -ERANGE;
1210
1211 out:
1212         spin_lock(&sbi->ll_lock);
1213         sbi->ll_ra_info.ra_range_pages = pages_number;
1214         spin_unlock(&sbi->ll_lock);
1215
1216         return count;
1217 }
1218 LUSTRE_RW_ATTR(read_ahead_range_kb);
1219
1220 static ssize_t fast_read_show(struct kobject *kobj,
1221                               struct attribute *attr,
1222                               char *buf)
1223 {
1224         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1225                                               ll_kset.kobj);
1226
1227         return sprintf(buf, "%u\n", !!(sbi->ll_flags & LL_SBI_FAST_READ));
1228 }
1229
1230 static ssize_t fast_read_store(struct kobject *kobj,
1231                                struct attribute *attr,
1232                                const char *buffer,
1233                                size_t count)
1234 {
1235         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1236                                               ll_kset.kobj);
1237         bool val;
1238         int rc;
1239
1240         rc = kstrtobool(buffer, &val);
1241         if (rc)
1242                 return rc;
1243
1244         spin_lock(&sbi->ll_lock);
1245         if (val)
1246                 sbi->ll_flags |= LL_SBI_FAST_READ;
1247         else
1248                 sbi->ll_flags &= ~LL_SBI_FAST_READ;
1249         spin_unlock(&sbi->ll_lock);
1250
1251         return count;
1252 }
1253 LUSTRE_RW_ATTR(fast_read);
1254
1255 static ssize_t file_heat_show(struct kobject *kobj,
1256                               struct attribute *attr,
1257                               char *buf)
1258 {
1259         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1260                                               ll_kset.kobj);
1261
1262         return scnprintf(buf, PAGE_SIZE, "%u\n",
1263                          !!(sbi->ll_flags & LL_SBI_FILE_HEAT));
1264 }
1265
1266 static ssize_t file_heat_store(struct kobject *kobj,
1267                                struct attribute *attr,
1268                                const char *buffer,
1269                                size_t count)
1270 {
1271         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1272                                               ll_kset.kobj);
1273         bool val;
1274         int rc;
1275
1276         rc = kstrtobool(buffer, &val);
1277         if (rc)
1278                 return rc;
1279
1280         spin_lock(&sbi->ll_lock);
1281         if (val)
1282                 sbi->ll_flags |= LL_SBI_FILE_HEAT;
1283         else
1284                 sbi->ll_flags &= ~LL_SBI_FILE_HEAT;
1285         spin_unlock(&sbi->ll_lock);
1286
1287         return count;
1288 }
1289 LUSTRE_RW_ATTR(file_heat);
1290
1291 static ssize_t heat_decay_percentage_show(struct kobject *kobj,
1292                                           struct attribute *attr,
1293                                           char *buf)
1294 {
1295         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1296                                               ll_kset.kobj);
1297
1298         return scnprintf(buf, PAGE_SIZE, "%u\n",
1299                          (sbi->ll_heat_decay_weight * 100 + 128) / 256);
1300 }
1301
1302 static ssize_t heat_decay_percentage_store(struct kobject *kobj,
1303                                            struct attribute *attr,
1304                                            const char *buffer,
1305                                            size_t count)
1306 {
1307         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1308                                               ll_kset.kobj);
1309         unsigned long val;
1310         int rc;
1311
1312         rc = kstrtoul(buffer, 10, &val);
1313         if (rc)
1314                 return rc;
1315
1316         if (val < 0 || val > 100)
1317                 return -ERANGE;
1318
1319         sbi->ll_heat_decay_weight = (val * 256 + 50) / 100;
1320
1321         return count;
1322 }
1323 LUSTRE_RW_ATTR(heat_decay_percentage);
1324
1325 static ssize_t heat_period_second_show(struct kobject *kobj,
1326                                        struct attribute *attr,
1327                                        char *buf)
1328 {
1329         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1330                                               ll_kset.kobj);
1331
1332         return scnprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_heat_period_second);
1333 }
1334
1335 static ssize_t heat_period_second_store(struct kobject *kobj,
1336                                         struct attribute *attr,
1337                                         const char *buffer,
1338                                         size_t count)
1339 {
1340         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1341                                               ll_kset.kobj);
1342         unsigned long val;
1343         int rc;
1344
1345         rc = kstrtoul(buffer, 10, &val);
1346         if (rc)
1347                 return rc;
1348
1349         if (val <= 0)
1350                 return -ERANGE;
1351
1352         sbi->ll_heat_period_second = val;
1353
1354         return count;
1355 }
1356 LUSTRE_RW_ATTR(heat_period_second);
1357
1358 static int ll_unstable_stats_seq_show(struct seq_file *m, void *v)
1359 {
1360         struct super_block      *sb    = m->private;
1361         struct ll_sb_info       *sbi   = ll_s2sbi(sb);
1362         struct cl_client_cache  *cache = sbi->ll_cache;
1363         long pages;
1364         int mb;
1365
1366         pages = atomic_long_read(&cache->ccc_unstable_nr);
1367         mb    = (pages * PAGE_SIZE) >> 20;
1368
1369         seq_printf(m, "unstable_check:     %8d\n"
1370                       "unstable_pages: %12ld\n"
1371                       "unstable_mb:        %8d\n",
1372                    cache->ccc_unstable_check, pages, mb);
1373         return 0;
1374 }
1375
1376 static ssize_t ll_unstable_stats_seq_write(struct file *file,
1377                                            const char __user *buffer,
1378                                            size_t count, loff_t *unused)
1379 {
1380         struct seq_file *seq = file->private_data;
1381         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)seq->private);
1382         char kernbuf[128];
1383         bool val;
1384         int rc;
1385
1386         if (count == 0)
1387                 return 0;
1388         if (count >= sizeof(kernbuf))
1389                 return -EINVAL;
1390
1391         if (copy_from_user(kernbuf, buffer, count))
1392                 return -EFAULT;
1393         kernbuf[count] = 0;
1394
1395         buffer += lprocfs_find_named_value(kernbuf, "unstable_check:", &count) -
1396                   kernbuf;
1397         rc = kstrtobool_from_user(buffer, count, &val);
1398         if (rc < 0)
1399                 return rc;
1400
1401         /* borrow lru lock to set the value */
1402         spin_lock(&sbi->ll_cache->ccc_lru_lock);
1403         sbi->ll_cache->ccc_unstable_check = val;
1404         spin_unlock(&sbi->ll_cache->ccc_lru_lock);
1405
1406         return count;
1407 }
1408
1409 LDEBUGFS_SEQ_FOPS(ll_unstable_stats);
1410
1411 static int ll_root_squash_seq_show(struct seq_file *m, void *v)
1412 {
1413         struct super_block *sb = m->private;
1414         struct ll_sb_info *sbi = ll_s2sbi(sb);
1415         struct root_squash_info *squash = &sbi->ll_squash;
1416
1417         seq_printf(m, "%u:%u\n", squash->rsi_uid, squash->rsi_gid);
1418         return 0;
1419 }
1420
1421 static ssize_t ll_root_squash_seq_write(struct file *file,
1422                                         const char __user *buffer,
1423                                         size_t count, loff_t *off)
1424 {
1425         struct seq_file *m = file->private_data;
1426         struct super_block *sb = m->private;
1427         struct ll_sb_info *sbi = ll_s2sbi(sb);
1428         struct root_squash_info *squash = &sbi->ll_squash;
1429
1430         return lprocfs_wr_root_squash(buffer, count, squash, sbi->ll_fsname);
1431 }
1432
1433 LDEBUGFS_SEQ_FOPS(ll_root_squash);
1434
1435 static int ll_nosquash_nids_seq_show(struct seq_file *m, void *v)
1436 {
1437         struct super_block *sb = m->private;
1438         struct ll_sb_info *sbi = ll_s2sbi(sb);
1439         struct root_squash_info *squash = &sbi->ll_squash;
1440         int len;
1441
1442         spin_lock(&squash->rsi_lock);
1443         if (!list_empty(&squash->rsi_nosquash_nids)) {
1444                 len = cfs_print_nidlist(m->buf + m->count, m->size - m->count,
1445                                         &squash->rsi_nosquash_nids);
1446                 m->count += len;
1447                 seq_putc(m, '\n');
1448         } else {
1449                 seq_puts(m, "NONE\n");
1450         }
1451         spin_unlock(&squash->rsi_lock);
1452
1453         return 0;
1454 }
1455
1456 static ssize_t ll_nosquash_nids_seq_write(struct file *file,
1457                                           const char __user *buffer,
1458                                           size_t count, loff_t *off)
1459 {
1460         struct seq_file *m = file->private_data;
1461         struct super_block *sb = m->private;
1462         struct ll_sb_info *sbi = ll_s2sbi(sb);
1463         struct root_squash_info *squash = &sbi->ll_squash;
1464         int rc;
1465
1466         rc = lprocfs_wr_nosquash_nids(buffer, count, squash, sbi->ll_fsname);
1467         if (rc < 0)
1468                 return rc;
1469
1470         ll_compute_rootsquash_state(sbi);
1471
1472         return rc;
1473 }
1474
1475 LDEBUGFS_SEQ_FOPS(ll_nosquash_nids);
1476
1477 static int ll_pcc_seq_show(struct seq_file *m, void *v)
1478 {
1479         struct super_block *sb = m->private;
1480         struct ll_sb_info *sbi = ll_s2sbi(sb);
1481
1482         return pcc_super_dump(&sbi->ll_pcc_super, m);
1483 }
1484
1485 static ssize_t ll_pcc_seq_write(struct file *file, const char __user *buffer,
1486                                 size_t count, loff_t *off)
1487 {
1488         struct seq_file *m = file->private_data;
1489         struct super_block *sb = m->private;
1490         struct ll_sb_info *sbi = ll_s2sbi(sb);
1491         int rc;
1492         char *kernbuf;
1493
1494         if (count >= LPROCFS_WR_PCC_MAX_CMD)
1495                 return -EINVAL;
1496
1497         if (!(exp_connect_flags2(sbi->ll_md_exp) & OBD_CONNECT2_PCC))
1498                 return -EOPNOTSUPP;
1499
1500         OBD_ALLOC(kernbuf, count + 1);
1501         if (kernbuf == NULL)
1502                 return -ENOMEM;
1503
1504         if (copy_from_user(kernbuf, buffer, count))
1505                 GOTO(out_free_kernbuff, rc = -EFAULT);
1506
1507         rc = pcc_cmd_handle(kernbuf, count, &sbi->ll_pcc_super);
1508 out_free_kernbuff:
1509         OBD_FREE(kernbuf, count + 1);
1510         return rc ? rc : count;
1511 }
1512 LDEBUGFS_SEQ_FOPS(ll_pcc);
1513
1514 struct ldebugfs_vars lprocfs_llite_obd_vars[] = {
1515         { .name =       "site",
1516           .fops =       &ll_site_stats_fops                     },
1517         { .name =       "max_cached_mb",
1518           .fops =       &ll_max_cached_mb_fops                  },
1519         { .name =       "statahead_stats",
1520           .fops =       &ll_statahead_stats_fops                },
1521         { .name =       "unstable_stats",
1522           .fops =       &ll_unstable_stats_fops                 },
1523         { .name =       "sbi_flags",
1524           .fops =       &ll_sbi_flags_fops                      },
1525         { .name =       "root_squash",
1526           .fops =       &ll_root_squash_fops                    },
1527         { .name =       "nosquash_nids",
1528           .fops =       &ll_nosquash_nids_fops                  },
1529         { .name =       "pcc",
1530           .fops =       &ll_pcc_fops,                           },
1531         { NULL }
1532 };
1533
1534 #define MAX_STRING_SIZE 128
1535
1536 static struct attribute *llite_attrs[] = {
1537         &lustre_attr_blocksize.attr,
1538         &lustre_attr_stat_blocksize.attr,
1539         &lustre_attr_kbytestotal.attr,
1540         &lustre_attr_kbytesfree.attr,
1541         &lustre_attr_kbytesavail.attr,
1542         &lustre_attr_filestotal.attr,
1543         &lustre_attr_filesfree.attr,
1544         &lustre_attr_client_type.attr,
1545         &lustre_attr_foreign_symlink_enable.attr,
1546         &lustre_attr_foreign_symlink_prefix.attr,
1547         &lustre_attr_foreign_symlink_upcall.attr,
1548         &lustre_attr_foreign_symlink_upcall_info.attr,
1549         &lustre_attr_fstype.attr,
1550         &lustre_attr_uuid.attr,
1551         &lustre_attr_checksums.attr,
1552         &lustre_attr_checksum_pages.attr,
1553         &lustre_attr_max_read_ahead_mb.attr,
1554         &lustre_attr_max_read_ahead_per_file_mb.attr,
1555         &lustre_attr_max_read_ahead_whole_mb.attr,
1556         &lustre_attr_max_read_ahead_async_active.attr,
1557         &lustre_attr_read_ahead_async_file_threshold_mb.attr,
1558         &lustre_attr_read_ahead_range_kb.attr,
1559         &lustre_attr_stats_track_pid.attr,
1560         &lustre_attr_stats_track_ppid.attr,
1561         &lustre_attr_stats_track_gid.attr,
1562         &lustre_attr_statahead_running_max.attr,
1563         &lustre_attr_statahead_max.attr,
1564         &lustre_attr_statahead_agl.attr,
1565         &lustre_attr_lazystatfs.attr,
1566         &lustre_attr_statfs_max_age.attr,
1567         &lustre_attr_max_easize.attr,
1568         &lustre_attr_default_easize.attr,
1569         &lustre_attr_xattr_cache.attr,
1570         &lustre_attr_fast_read.attr,
1571         &lustre_attr_tiny_write.attr,
1572         &lustre_attr_file_heat.attr,
1573         &lustre_attr_heat_decay_percentage.attr,
1574         &lustre_attr_heat_period_second.attr,
1575         NULL,
1576 };
1577
1578 static void sbi_kobj_release(struct kobject *kobj)
1579 {
1580         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1581                                               ll_kset.kobj);
1582         complete(&sbi->ll_kobj_unregister);
1583 }
1584
1585 static struct kobj_type sbi_ktype = {
1586         .default_attrs  = llite_attrs,
1587         .sysfs_ops      = &lustre_sysfs_ops,
1588         .release        = sbi_kobj_release,
1589 };
1590
1591 static const struct llite_file_opcode {
1592         __u32           opcode;
1593         __u32           type;
1594         const char      *opname;
1595 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
1596         /* file operation */
1597         { LPROC_LL_READ_BYTES,  LPROCFS_TYPE_BYTES_FULL, "read_bytes" },
1598         { LPROC_LL_WRITE_BYTES, LPROCFS_TYPE_BYTES_FULL, "write_bytes" },
1599         { LPROC_LL_READ,        LPROCFS_TYPE_LATENCY,   "read" },
1600         { LPROC_LL_WRITE,       LPROCFS_TYPE_LATENCY,   "write" },
1601         { LPROC_LL_IOCTL,       LPROCFS_TYPE_REQS,      "ioctl" },
1602         { LPROC_LL_OPEN,        LPROCFS_TYPE_LATENCY,   "open" },
1603         { LPROC_LL_RELEASE,     LPROCFS_TYPE_LATENCY,   "close" },
1604         { LPROC_LL_MMAP,        LPROCFS_TYPE_LATENCY,   "mmap" },
1605         { LPROC_LL_FAULT,       LPROCFS_TYPE_LATENCY,   "page_fault" },
1606         { LPROC_LL_MKWRITE,     LPROCFS_TYPE_LATENCY,   "page_mkwrite" },
1607         { LPROC_LL_LLSEEK,      LPROCFS_TYPE_LATENCY,   "seek" },
1608         { LPROC_LL_FSYNC,       LPROCFS_TYPE_LATENCY,   "fsync" },
1609         { LPROC_LL_READDIR,     LPROCFS_TYPE_LATENCY,   "readdir" },
1610         /* inode operation */
1611         { LPROC_LL_SETATTR,     LPROCFS_TYPE_LATENCY,   "setattr" },
1612         { LPROC_LL_TRUNC,       LPROCFS_TYPE_LATENCY,   "truncate" },
1613         { LPROC_LL_FLOCK,       LPROCFS_TYPE_LATENCY,   "flock" },
1614         { LPROC_LL_GETATTR,     LPROCFS_TYPE_LATENCY,   "getattr" },
1615         { LPROC_LL_FALLOCATE,   LPROCFS_TYPE_LATENCY, "fallocate"},
1616         /* dir inode operation */
1617         { LPROC_LL_CREATE,      LPROCFS_TYPE_LATENCY,   "create" },
1618         { LPROC_LL_LINK,        LPROCFS_TYPE_LATENCY,   "link" },
1619         { LPROC_LL_UNLINK,      LPROCFS_TYPE_LATENCY,   "unlink" },
1620         { LPROC_LL_SYMLINK,     LPROCFS_TYPE_LATENCY,   "symlink" },
1621         { LPROC_LL_MKDIR,       LPROCFS_TYPE_LATENCY,   "mkdir" },
1622         { LPROC_LL_RMDIR,       LPROCFS_TYPE_LATENCY,   "rmdir" },
1623         { LPROC_LL_MKNOD,       LPROCFS_TYPE_LATENCY,   "mknod" },
1624         { LPROC_LL_RENAME,      LPROCFS_TYPE_LATENCY,   "rename" },
1625         /* special inode operation */
1626         { LPROC_LL_STATFS,      LPROCFS_TYPE_LATENCY,   "statfs" },
1627         { LPROC_LL_SETXATTR,    LPROCFS_TYPE_LATENCY,   "setxattr" },
1628         { LPROC_LL_GETXATTR,    LPROCFS_TYPE_LATENCY,   "getxattr" },
1629         { LPROC_LL_GETXATTR_HITS, LPROCFS_TYPE_REQS,    "getxattr_hits" },
1630         { LPROC_LL_LISTXATTR,   LPROCFS_TYPE_LATENCY,   "listxattr" },
1631         { LPROC_LL_REMOVEXATTR, LPROCFS_TYPE_LATENCY,   "removexattr" },
1632         { LPROC_LL_INODE_PERM,  LPROCFS_TYPE_LATENCY,   "inode_permission" },
1633 };
1634
1635 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, long count)
1636 {
1637         if (!sbi->ll_stats)
1638                 return;
1639
1640         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
1641                 lprocfs_counter_add(sbi->ll_stats, op, count);
1642         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
1643                  sbi->ll_stats_track_id == current->pid)
1644                 lprocfs_counter_add(sbi->ll_stats, op, count);
1645         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
1646                  sbi->ll_stats_track_id == current->parent->pid)
1647                 lprocfs_counter_add(sbi->ll_stats, op, count);
1648         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
1649                  sbi->ll_stats_track_id ==
1650                         from_kgid(&init_user_ns, current_gid()))
1651                 lprocfs_counter_add(sbi->ll_stats, op, count);
1652 }
1653 EXPORT_SYMBOL(ll_stats_ops_tally);
1654
1655 static const char *const ra_stat_string[] = {
1656         [RA_STAT_HIT] = "hits",
1657         [RA_STAT_MISS] = "misses",
1658         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
1659         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
1660         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
1661         [RA_STAT_FAILED_MATCH] = "failed lock match",
1662         [RA_STAT_DISCARDED] = "read but discarded",
1663         [RA_STAT_ZERO_LEN] = "zero length file",
1664         [RA_STAT_ZERO_WINDOW] = "zero size window",
1665         [RA_STAT_EOF] = "read-ahead to EOF",
1666         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
1667         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
1668         [RA_STAT_FAILED_REACH_END] = "failed to reach end",
1669         [RA_STAT_ASYNC] = "async readahead",
1670         [RA_STAT_FAILED_FAST_READ] = "failed to fast read",
1671         [RA_STAT_MMAP_RANGE_READ] = "mmap range read",
1672 };
1673
1674 int ll_debugfs_register_super(struct super_block *sb, const char *name)
1675 {
1676         struct lustre_sb_info *lsi = s2lsi(sb);
1677         struct ll_sb_info *sbi = ll_s2sbi(sb);
1678         int err, id;
1679
1680         ENTRY;
1681         LASSERT(sbi);
1682
1683         if (IS_ERR_OR_NULL(llite_root))
1684                 goto out_ll_kset;
1685
1686         sbi->ll_debugfs_entry = debugfs_create_dir(name, llite_root);
1687         ldebugfs_add_vars(sbi->ll_debugfs_entry, lprocfs_llite_obd_vars, sb);
1688
1689         debugfs_create_file("dump_page_cache", 0444, sbi->ll_debugfs_entry, sbi,
1690                             &vvp_dump_pgcache_file_ops);
1691
1692         debugfs_create_file("extents_stats", 0644, sbi->ll_debugfs_entry, sbi,
1693                                  &ll_rw_extents_stats_fops);
1694
1695         debugfs_create_file("extents_stats_per_process", 0644,
1696                             sbi->ll_debugfs_entry, sbi,
1697                             &ll_rw_extents_stats_pp_fops);
1698
1699         debugfs_create_file("offset_stats", 0644, sbi->ll_debugfs_entry, sbi,
1700                             &ll_rw_offset_stats_fops);
1701
1702         /* File operations stats */
1703         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
1704                                             LPROCFS_STATS_FLAG_NONE);
1705         if (sbi->ll_stats == NULL)
1706                 GOTO(out_debugfs, err = -ENOMEM);
1707
1708         /* do counter init */
1709         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
1710                 u32 type = llite_opcode_table[id].type;
1711                 void *ptr = "unknown";
1712
1713                 if (type & LPROCFS_TYPE_REQS)
1714                         ptr = "reqs";
1715                 else if (type & LPROCFS_TYPE_BYTES)
1716                         ptr = "bytes";
1717                 else if (type & LPROCFS_TYPE_USEC)
1718                         ptr = "usec";
1719                 lprocfs_counter_init(sbi->ll_stats,
1720                                      llite_opcode_table[id].opcode, type,
1721                                      llite_opcode_table[id].opname, ptr);
1722         }
1723
1724         debugfs_create_file("stats", 0644, sbi->ll_debugfs_entry,
1725                             sbi->ll_stats, &ldebugfs_stats_seq_fops);
1726
1727         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1728                                                LPROCFS_STATS_FLAG_NONE);
1729         if (sbi->ll_ra_stats == NULL)
1730                 GOTO(out_stats, err = -ENOMEM);
1731
1732         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1733                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
1734                                      ra_stat_string[id], "pages");
1735
1736         debugfs_create_file("read_ahead_stats", 0644, sbi->ll_debugfs_entry,
1737                             sbi->ll_ra_stats, &ldebugfs_stats_seq_fops);
1738
1739 out_ll_kset:
1740         /* Yes we also register sysfs mount kset here as well */
1741         sbi->ll_kset.kobj.parent = llite_kobj;
1742         sbi->ll_kset.kobj.ktype = &sbi_ktype;
1743         init_completion(&sbi->ll_kobj_unregister);
1744         err = kobject_set_name(&sbi->ll_kset.kobj, "%s", name);
1745         if (err)
1746                 GOTO(out_ra_stats, err);
1747
1748         err = kset_register(&sbi->ll_kset);
1749         if (err)
1750                 GOTO(out_ra_stats, err);
1751
1752         lsi->lsi_kobj = kobject_get(&sbi->ll_kset.kobj);
1753
1754         RETURN(0);
1755 out_ra_stats:
1756         lprocfs_free_stats(&sbi->ll_ra_stats);
1757 out_stats:
1758         lprocfs_free_stats(&sbi->ll_stats);
1759 out_debugfs:
1760         debugfs_remove_recursive(sbi->ll_debugfs_entry);
1761
1762         RETURN(err);
1763 }
1764
1765 void ll_debugfs_unregister_super(struct super_block *sb)
1766 {
1767         struct lustre_sb_info *lsi = s2lsi(sb);
1768         struct ll_sb_info *sbi = ll_s2sbi(sb);
1769
1770         debugfs_remove_recursive(sbi->ll_debugfs_entry);
1771
1772         if (sbi->ll_dt_obd)
1773                 sysfs_remove_link(&sbi->ll_kset.kobj,
1774                                   sbi->ll_dt_obd->obd_type->typ_name);
1775
1776         if (sbi->ll_md_obd)
1777                 sysfs_remove_link(&sbi->ll_kset.kobj,
1778                                   sbi->ll_md_obd->obd_type->typ_name);
1779
1780         kobject_put(lsi->lsi_kobj);
1781
1782         kset_unregister(&sbi->ll_kset);
1783         wait_for_completion(&sbi->ll_kobj_unregister);
1784
1785         lprocfs_free_stats(&sbi->ll_ra_stats);
1786         lprocfs_free_stats(&sbi->ll_stats);
1787 }
1788 #undef MAX_STRING_SIZE
1789
1790 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1791                                    struct seq_file *seq, int which)
1792 {
1793         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1794         unsigned long start, end, r, w;
1795         char *unitp = "KMGTPEZY";
1796         int i, units = 10;
1797         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1798
1799         read_cum = 0;
1800         write_cum = 0;
1801         start = 0;
1802
1803         for(i = 0; i < LL_HIST_MAX; i++) {
1804                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1805                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1806         }
1807
1808         for(i = 0; i < LL_HIST_MAX; i++) {
1809                 r = pp_info->pp_r_hist.oh_buckets[i];
1810                 w = pp_info->pp_w_hist.oh_buckets[i];
1811                 read_cum += r;
1812                 write_cum += w;
1813                 end = 1 << (i + LL_HIST_START - units);
1814                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4u %4u  | "
1815                            "%14lu %4u %4u\n", start, *unitp, end, *unitp,
1816                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1817                            r, pct(r, read_tot), pct(read_cum, read_tot),
1818                            w, pct(w, write_tot), pct(write_cum, write_tot));
1819                 start = end;
1820                 if (start == (1 << 10)) {
1821                         start = 1;
1822                         units += 10;
1823                         unitp++;
1824                 }
1825                 if (read_cum == read_tot && write_cum == write_tot)
1826                         break;
1827         }
1828 }
1829
1830 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1831 {
1832         struct timespec64 now;
1833         struct ll_sb_info *sbi = seq->private;
1834         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1835         int k;
1836
1837         ktime_get_real_ts64(&now);
1838
1839         if (!sbi->ll_rw_stats_on) {
1840                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
1841                 return 0;
1842         }
1843         seq_printf(seq, "snapshot_time:         %llu.%09lu (secs.nsecs)\n",
1844                    (s64)now.tv_sec, now.tv_nsec);
1845         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1846         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1847                    "extents", "calls", "%", "cum%",
1848                    "calls", "%", "cum%");
1849         spin_lock(&sbi->ll_pp_extent_lock);
1850         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1851                 if (io_extents->pp_extents[k].pid != 0) {
1852                         seq_printf(seq, "\nPID: %d\n",
1853                                    io_extents->pp_extents[k].pid);
1854                         ll_display_extents_info(io_extents, seq, k);
1855                 }
1856         }
1857         spin_unlock(&sbi->ll_pp_extent_lock);
1858         return 0;
1859 }
1860
1861 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1862                                                 const char __user *buf,
1863                                                 size_t len,
1864                                                 loff_t *off)
1865 {
1866         struct seq_file *seq = file->private_data;
1867         struct ll_sb_info *sbi = seq->private;
1868         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1869         int i;
1870         __s64 value;
1871
1872         if (len == 0)
1873                 return -EINVAL;
1874
1875         value = ll_stats_pid_write(buf, len);
1876
1877         if (value == 0)
1878                 sbi->ll_rw_stats_on = 0;
1879         else
1880                 sbi->ll_rw_stats_on = 1;
1881
1882         spin_lock(&sbi->ll_pp_extent_lock);
1883         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1884                 io_extents->pp_extents[i].pid = 0;
1885                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1886                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1887         }
1888         spin_unlock(&sbi->ll_pp_extent_lock);
1889         return len;
1890 }
1891
1892 LDEBUGFS_SEQ_FOPS(ll_rw_extents_stats_pp);
1893
1894 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1895 {
1896         struct timespec64 now;
1897         struct ll_sb_info *sbi = seq->private;
1898         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1899
1900         ktime_get_real_ts64(&now);
1901
1902         if (!sbi->ll_rw_stats_on) {
1903                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
1904                 return 0;
1905         }
1906         seq_printf(seq, "snapshot_time:         %llu.%09lu (secs.nsecs)\n",
1907                    (s64)now.tv_sec, now.tv_nsec);
1908
1909         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1910         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1911                    "extents", "calls", "%", "cum%",
1912                    "calls", "%", "cum%");
1913         spin_lock(&sbi->ll_lock);
1914         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1915         spin_unlock(&sbi->ll_lock);
1916
1917         return 0;
1918 }
1919
1920 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
1921                                              const char __user *buf,
1922                                              size_t len, loff_t *off)
1923 {
1924         struct seq_file *seq = file->private_data;
1925         struct ll_sb_info *sbi = seq->private;
1926         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1927         int i;
1928         __s64 value;
1929
1930         if (len == 0)
1931                 return -EINVAL;
1932
1933         value = ll_stats_pid_write(buf, len);
1934
1935         if (value == 0)
1936                 sbi->ll_rw_stats_on = 0;
1937         else
1938                 sbi->ll_rw_stats_on = 1;
1939
1940         spin_lock(&sbi->ll_pp_extent_lock);
1941         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1942                 io_extents->pp_extents[i].pid = 0;
1943                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1944                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1945         }
1946         spin_unlock(&sbi->ll_pp_extent_lock);
1947
1948         return len;
1949 }
1950
1951 LDEBUGFS_SEQ_FOPS(ll_rw_extents_stats);
1952
1953 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1954                        struct ll_file_data *file, loff_t pos,
1955                        size_t count, int rw)
1956 {
1957         int i, cur = -1;
1958         struct ll_rw_process_info *process;
1959         struct ll_rw_process_info *offset;
1960         int *off_count = &sbi->ll_rw_offset_entry_count;
1961         int *process_count = &sbi->ll_offset_process_count;
1962         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1963
1964         if(!sbi->ll_rw_stats_on)
1965                 return;
1966         process = sbi->ll_rw_process_info;
1967         offset = sbi->ll_rw_offset_info;
1968
1969         spin_lock(&sbi->ll_pp_extent_lock);
1970         /* Extent statistics */
1971         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1972                 if(io_extents->pp_extents[i].pid == pid) {
1973                         cur = i;
1974                         break;
1975                 }
1976         }
1977
1978         if (cur == -1) {
1979                 /* new process */
1980                 sbi->ll_extent_process_count =
1981                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1982                 cur = sbi->ll_extent_process_count;
1983                 io_extents->pp_extents[cur].pid = pid;
1984                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1985                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1986         }
1987
1988         for (i = 0; (count >= 1 << (LL_HIST_START + i)) &&
1989              (i < (LL_HIST_MAX - 1)); i++);
1990         if (rw == 0) {
1991                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1992                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1993         } else {
1994                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1995                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1996         }
1997         spin_unlock(&sbi->ll_pp_extent_lock);
1998
1999         spin_lock(&sbi->ll_process_lock);
2000         /* Offset statistics */
2001         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
2002                 if (process[i].rw_pid == pid) {
2003                         if (process[i].rw_last_file != file) {
2004                                 process[i].rw_range_start = pos;
2005                                 process[i].rw_last_file_pos = pos + count;
2006                                 process[i].rw_smallest_extent = count;
2007                                 process[i].rw_largest_extent = count;
2008                                 process[i].rw_offset = 0;
2009                                 process[i].rw_last_file = file;
2010                                 spin_unlock(&sbi->ll_process_lock);
2011                                 return;
2012                         }
2013                         if (process[i].rw_last_file_pos != pos) {
2014                                 *off_count =
2015                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
2016                                 offset[*off_count].rw_op = process[i].rw_op;
2017                                 offset[*off_count].rw_pid = pid;
2018                                 offset[*off_count].rw_range_start =
2019                                         process[i].rw_range_start;
2020                                 offset[*off_count].rw_range_end =
2021                                         process[i].rw_last_file_pos;
2022                                 offset[*off_count].rw_smallest_extent =
2023                                         process[i].rw_smallest_extent;
2024                                 offset[*off_count].rw_largest_extent =
2025                                         process[i].rw_largest_extent;
2026                                 offset[*off_count].rw_offset =
2027                                         process[i].rw_offset;
2028                                 process[i].rw_op = rw;
2029                                 process[i].rw_range_start = pos;
2030                                 process[i].rw_smallest_extent = count;
2031                                 process[i].rw_largest_extent = count;
2032                                 process[i].rw_offset = pos -
2033                                         process[i].rw_last_file_pos;
2034                         }
2035                         if(process[i].rw_smallest_extent > count)
2036                                 process[i].rw_smallest_extent = count;
2037                         if(process[i].rw_largest_extent < count)
2038                                 process[i].rw_largest_extent = count;
2039                         process[i].rw_last_file_pos = pos + count;
2040                         spin_unlock(&sbi->ll_process_lock);
2041                         return;
2042                 }
2043         }
2044         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
2045         process[*process_count].rw_pid = pid;
2046         process[*process_count].rw_op = rw;
2047         process[*process_count].rw_range_start = pos;
2048         process[*process_count].rw_last_file_pos = pos + count;
2049         process[*process_count].rw_smallest_extent = count;
2050         process[*process_count].rw_largest_extent = count;
2051         process[*process_count].rw_offset = 0;
2052         process[*process_count].rw_last_file = file;
2053         spin_unlock(&sbi->ll_process_lock);
2054 }
2055
2056 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
2057 {
2058         struct timespec64 now;
2059         struct ll_sb_info *sbi = seq->private;
2060         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
2061         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
2062         int i;
2063
2064         ktime_get_real_ts64(&now);
2065
2066         if (!sbi->ll_rw_stats_on) {
2067                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
2068                 return 0;
2069         }
2070         spin_lock(&sbi->ll_process_lock);
2071
2072         seq_printf(seq, "snapshot_time:         %llu.%09lu (secs.nsecs)\n",
2073                    (s64)now.tv_sec, now.tv_nsec);
2074         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
2075                    "R/W", "PID", "RANGE START", "RANGE END",
2076                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
2077
2078         /* We stored the discontiguous offsets here; print them first */
2079         for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
2080                 if (offset[i].rw_pid != 0)
2081                         seq_printf(seq,
2082                                   "%3c %10d %14llu %14llu %17lu %17lu %14lld\n",
2083                                    offset[i].rw_op == READ ? 'R' : 'W',
2084                                    offset[i].rw_pid,
2085                                    offset[i].rw_range_start,
2086                                    offset[i].rw_range_end,
2087                                    (unsigned long)offset[i].rw_smallest_extent,
2088                                    (unsigned long)offset[i].rw_largest_extent,
2089                                    offset[i].rw_offset);
2090         }
2091
2092         /* Then print the current offsets for each process */
2093         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
2094                 if (process[i].rw_pid != 0)
2095                         seq_printf(seq,
2096                                   "%3c %10d %14llu %14llu %17lu %17lu %14lld\n",
2097                                    process[i].rw_op == READ ? 'R' : 'W',
2098                                    process[i].rw_pid,
2099                                    process[i].rw_range_start,
2100                                    process[i].rw_last_file_pos,
2101                                    (unsigned long)process[i].rw_smallest_extent,
2102                                    (unsigned long)process[i].rw_largest_extent,
2103                                    process[i].rw_offset);
2104         }
2105         spin_unlock(&sbi->ll_process_lock);
2106
2107         return 0;
2108 }
2109
2110 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
2111                                             const char __user *buf,
2112                                             size_t len, loff_t *off)
2113 {
2114         struct seq_file *seq = file->private_data;
2115         struct ll_sb_info *sbi = seq->private;
2116         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
2117         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
2118         __s64 value;
2119
2120         if (len == 0)
2121                 return -EINVAL;
2122
2123         value = ll_stats_pid_write(buf, len);
2124
2125         if (value == 0)
2126                 sbi->ll_rw_stats_on = 0;
2127         else
2128                 sbi->ll_rw_stats_on = 1;
2129
2130         spin_lock(&sbi->ll_process_lock);
2131         sbi->ll_offset_process_count = 0;
2132         sbi->ll_rw_offset_entry_count = 0;
2133         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
2134                LL_PROCESS_HIST_MAX);
2135         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
2136                LL_OFFSET_HIST_MAX);
2137         spin_unlock(&sbi->ll_process_lock);
2138
2139         return len;
2140 }
2141
2142 LDEBUGFS_SEQ_FOPS(ll_rw_offset_stats);