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 "lprocfs_status.h"
  43 #include "vvp_internal.h"
  44
  45 static struct kobject *llite_kobj;
  46 static struct dentry *llite_root;
  47
  48 static void llite_kobj_release(struct kobject *kobj)
  49 {
  50         if (!IS_ERR_OR_NULL(llite_root)) {
  51                 debugfs_remove(llite_root);
  52                 llite_root = NULL;
  53         }
  54
  55         kfree(kobj);
  56 }
  57
  58 static struct kobj_type llite_kobj_ktype = {
  59         .release        = llite_kobj_release,
  60         .sysfs_ops      = &lustre_sysfs_ops,
  61 };
  62
  63 int llite_tunables_register(void)
  64 {
  65         int rc;
  66
  67         llite_kobj = kzalloc(sizeof(*llite_kobj), GFP_KERNEL);
  68         if (!llite_kobj)
  69                 return -ENOMEM;
  70
  71         llite_kobj->kset = lustre_kset;
  72         rc = kobject_init_and_add(llite_kobj, &llite_kobj_ktype,
  73                                   &lustre_kset->kobj, "%s", "llite");
  74         if (rc)
  75                 goto free_kobj;
  76
  77         llite_root = debugfs_create_dir("llite", debugfs_lustre_root);
  78         return 0;
  79
  80 free_kobj:
  81         kobject_put(llite_kobj);
  82         llite_kobj = NULL;
  83
  84         return rc;
  85 }
  86
  87 void llite_tunables_unregister(void)
  88 {
  89         kobject_put(llite_kobj);
  90         llite_kobj = NULL;
  91 }
  92
  93 /* <debugfs>/lustre/llite mount point registration */
  94 static const struct file_operations ll_rw_extents_stats_fops;
  95 static const struct file_operations ll_rw_extents_stats_pp_fops;
  96 static const struct file_operations ll_rw_offset_stats_fops;
  97
  98 /**
  99  * ll_stats_pid_write() - Determine if stats collection should be enabled
 100  * @buf: Buffer containing the data written
 101  * @len: Number of bytes in the buffer
 102  *
 103  * Several proc files begin collecting stats when a value is written, and stop
 104  * collecting when either '0' or 'disable' is written. This function checks the
 105  * written value to see if collection should be enabled or disabled.
 106  *
 107  * Return: If '0' or 'disable' is provided, 0 is returned. If the text
 108  * equivalent of a number is written, that number is returned. Otherwise,
 109  * 1 is returned. Non-zero return values indicate collection should be enabled.
 110  */
 111 static s64 ll_stats_pid_write(const char __user *buf, size_t len)
 112 {
 113         unsigned long long value = 1;
 114         char kernbuf[16];
 115         int rc;
 116
 117         rc = kstrtoull_from_user(buf, len, 0, &value);
 118         if (rc < 0 && len < sizeof(kernbuf)) {
 119                 if (copy_from_user(kernbuf, buf, len))
 120                         return -EFAULT;
 121                 kernbuf[len] = 0;
 122
 123                 if (kernbuf[len - 1] == '\n')
 124                         kernbuf[len - 1] = 0;
 125
 126                 if (strncasecmp(kernbuf, "disable", 7) == 0)
 127                         value = 0;
 128         }
 129
 130         return value;
 131 }
 132
 133 static ssize_t blocksize_show(struct kobject *kobj, struct attribute *attr,
 134                               char *buf)
 135 {
 136         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 137                                               ll_kset.kobj);
 138         struct obd_statfs osfs;
 139         int rc;
 140
 141         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
 142         if (rc)
 143                 return rc;
 144
 145         return sprintf(buf, "%u\n", osfs.os_bsize);
 146 }
 147 LUSTRE_RO_ATTR(blocksize);
 148
 149 static ssize_t stat_blocksize_show(struct kobject *kobj, struct attribute *attr,
 150                                    char *buf)
 151 {
 152         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 153                                               ll_kset.kobj);
 154
 155         return sprintf(buf, "%u\n", sbi->ll_stat_blksize);
 156 }
 157
 158 static ssize_t stat_blocksize_store(struct kobject *kobj,
 159                                     struct attribute *attr,
 160                                     const char *buffer,
 161                                     size_t count)
 162 {
 163         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 164                                               ll_kset.kobj);
 165         unsigned int val;
 166         int rc;
 167
 168         rc = kstrtouint(buffer, 10, &val);
 169         if (rc)
 170                 return rc;
 171
 172         if (val != 0 && (val < PAGE_SIZE || (val & (val - 1))) != 0)
 173                 return -ERANGE;
 174
 175         sbi->ll_stat_blksize = val;
 176
 177         return count;
 178 }
 179 LUSTRE_RW_ATTR(stat_blocksize);
 180
 181 static ssize_t kbytestotal_show(struct kobject *kobj, struct attribute *attr,
 182                                 char *buf)
 183 {
 184         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 185                                               ll_kset.kobj);
 186         struct obd_statfs osfs;
 187         u32 blk_size;
 188         u64 result;
 189         int rc;
 190
 191         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
 192         if (rc)
 193                 return rc;
 194
 195         blk_size = osfs.os_bsize >> 10;
 196         result = osfs.os_blocks;
 197
 198         while (blk_size >>= 1)
 199                 result <<= 1;
 200
 201         return sprintf(buf, "%llu\n", result);
 202 }
 203 LUSTRE_RO_ATTR(kbytestotal);
 204
 205 static ssize_t kbytesfree_show(struct kobject *kobj, struct attribute *attr,
 206                                char *buf)
 207 {
 208         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 209                                               ll_kset.kobj);
 210         struct obd_statfs osfs;
 211         u32 blk_size;
 212         u64 result;
 213         int rc;
 214
 215         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
 216         if (rc)
 217                 return rc;
 218
 219         blk_size = osfs.os_bsize >> 10;
 220         result = osfs.os_bfree;
 221
 222         while (blk_size >>= 1)
 223                 result <<= 1;
 224
 225         return sprintf(buf, "%llu\n", result);
 226 }
 227 LUSTRE_RO_ATTR(kbytesfree);
 228
 229 static ssize_t kbytesavail_show(struct kobject *kobj, struct attribute *attr,
 230                                 char *buf)
 231 {
 232         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 233                                               ll_kset.kobj);
 234         struct obd_statfs osfs;
 235         u32 blk_size;
 236         u64 result;
 237         int rc;
 238
 239         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
 240         if (rc)
 241                 return rc;
 242
 243         blk_size = osfs.os_bsize >> 10;
 244         result = osfs.os_bavail;
 245
 246         while (blk_size >>= 1)
 247                 result <<= 1;
 248
 249         return sprintf(buf, "%llu\n", result);
 250 }
 251 LUSTRE_RO_ATTR(kbytesavail);
 252
 253 static ssize_t filestotal_show(struct kobject *kobj, struct attribute *attr,
 254                                char *buf)
 255 {
 256         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 257                                               ll_kset.kobj);
 258         struct obd_statfs osfs;
 259         int rc;
 260
 261         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
 262         if (rc)
 263                 return rc;
 264
 265         return sprintf(buf, "%llu\n", osfs.os_files);
 266 }
 267 LUSTRE_RO_ATTR(filestotal);
 268
 269 static ssize_t filesfree_show(struct kobject *kobj, struct attribute *attr,
 270                               char *buf)
 271 {
 272         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 273                                               ll_kset.kobj);
 274         struct obd_statfs osfs;
 275         int rc;
 276
 277         rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
 278         if (rc)
 279                 return rc;
 280
 281         return sprintf(buf, "%llu\n", osfs.os_ffree);
 282 }
 283 LUSTRE_RO_ATTR(filesfree);
 284
 285 static ssize_t client_type_show(struct kobject *kobj, struct attribute *attr,
 286                                 char *buf)
 287 {
 288         return sprintf(buf, "local client\n");
 289 }
 290 LUSTRE_RO_ATTR(client_type);
 291
 292 LUSTRE_RW_ATTR(foreign_symlink_enable);
 293
 294 LUSTRE_RW_ATTR(foreign_symlink_prefix);
 295
 296 LUSTRE_RW_ATTR(foreign_symlink_upcall);
 297
 298 LUSTRE_WO_ATTR(foreign_symlink_upcall_info);
 299
 300 static ssize_t fstype_show(struct kobject *kobj, struct attribute *attr,
 301                            char *buf)
 302 {
 303         return sprintf(buf, "lustre\n");
 304 }
 305 LUSTRE_RO_ATTR(fstype);
 306
 307 static ssize_t uuid_show(struct kobject *kobj, struct attribute *attr,
 308                          char *buf)
 309 {
 310         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 311                                               ll_kset.kobj);
 312
 313         return sprintf(buf, "%s\n", sbi->ll_sb_uuid.uuid);
 314 }
 315 LUSTRE_RO_ATTR(uuid);
 316
 317 static int ll_site_stats_seq_show(struct seq_file *m, void *v)
 318 {
 319         struct super_block *sb = m->private;
 320
 321         /*
 322          * See description of statistical counters in struct cl_site, and
 323          * struct lu_site.
 324          */
 325         return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site), m);
 326 }
 327
 328 LDEBUGFS_SEQ_FOPS_RO(ll_site_stats);
 329
 330 static ssize_t max_read_ahead_mb_show(struct kobject *kobj,
 331                                       struct attribute *attr, char *buf)
 332 {
 333         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 334                                               ll_kset.kobj);
 335
 336         return scnprintf(buf, PAGE_SIZE, "%lu\n",
 337                         PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages));
 338 }
 339
 340 static ssize_t max_read_ahead_mb_store(struct kobject *kobj,
 341                                        struct attribute *attr,
 342                                        const char *buffer, size_t count)
 343 {
 344         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 345                                               ll_kset.kobj);
 346         u64 ra_max_mb, pages_number;
 347         int rc;
 348
 349         rc = sysfs_memparse(buffer, count, &ra_max_mb, "MiB");
 350         if (rc)
 351                 return rc;
 352
 353         pages_number = round_up(ra_max_mb, 1024 * 1024) >> PAGE_SHIFT;
 354         CDEBUG(D_INFO, "%s: set max_read_ahead_mb=%llu (%llu pages)\n",
 355                sbi->ll_fsname, PAGES_TO_MiB(pages_number), pages_number);
 356         if (pages_number > cfs_totalram_pages() / 2) {
 357                 /* 1/2 of RAM */
 358                 CERROR("%s: cannot set max_read_ahead_mb=%llu > totalram/2=%luMB\n",
 359                        sbi->ll_fsname, PAGES_TO_MiB(pages_number),
 360                        PAGES_TO_MiB(cfs_totalram_pages() / 2));
 361                 return -ERANGE;
 362         }
 363
 364         spin_lock(&sbi->ll_lock);
 365         sbi->ll_ra_info.ra_max_pages = pages_number;
 366         spin_unlock(&sbi->ll_lock);
 367
 368         return count;
 369 }
 370 LUSTRE_RW_ATTR(max_read_ahead_mb);
 371
 372 static ssize_t max_read_ahead_per_file_mb_show(struct kobject *kobj,
 373                                                struct attribute *attr,
 374                                                char *buf)
 375 {
 376         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 377                                               ll_kset.kobj);
 378
 379         return scnprintf(buf, PAGE_SIZE, "%lu\n",
 380                          PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages_per_file));
 381 }
 382
 383 static ssize_t max_read_ahead_per_file_mb_store(struct kobject *kobj,
 384                                                 struct attribute *attr,
 385                                                 const char *buffer,
 386                                                 size_t count)
 387 {
 388         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 389                                               ll_kset.kobj);
 390         u64 ra_max_file_mb, pages_number;
 391         int rc;
 392
 393         rc = sysfs_memparse(buffer, count, &ra_max_file_mb, "MiB");
 394         if (rc)
 395                 return rc;
 396
 397         pages_number = round_up(ra_max_file_mb, 1024 * 1024) >> PAGE_SHIFT;
 398         if (pages_number > sbi->ll_ra_info.ra_max_pages) {
 399                 CERROR("%s: cannot set max_read_ahead_per_file_mb=%llu > max_read_ahead_mb=%lu\n",
 400                        sbi->ll_fsname, PAGES_TO_MiB(pages_number),
 401                        PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages));
 402                 return -ERANGE;
 403         }
 404
 405         spin_lock(&sbi->ll_lock);
 406         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 407         spin_unlock(&sbi->ll_lock);
 408
 409         return count;
 410 }
 411 LUSTRE_RW_ATTR(max_read_ahead_per_file_mb);
 412
 413 static ssize_t max_read_ahead_whole_mb_show(struct kobject *kobj,
 414                                             struct attribute *attr, char *buf)
 415 {
 416         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 417                                               ll_kset.kobj);
 418
 419         return scnprintf(buf, PAGE_SIZE, "%lu\n",
 420                          PAGES_TO_MiB(sbi->ll_ra_info.ra_max_read_ahead_whole_pages));
 421 }
 422
 423 static ssize_t max_read_ahead_whole_mb_store(struct kobject *kobj,
 424                                              struct attribute *attr,
 425                                              const char *buffer, size_t count)
 426 {
 427         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 428                                               ll_kset.kobj);
 429         u64 ra_max_whole_mb, pages_number;
 430         int rc;
 431
 432         rc = sysfs_memparse(buffer, count, &ra_max_whole_mb, "MiB");
 433         if (rc)
 434                 return rc;
 435
 436         pages_number = round_up(ra_max_whole_mb, 1024 * 1024) >> PAGE_SHIFT;
 437         /* Cap this at the current max readahead window size, the readahead
 438          * algorithm does this anyway so it's pointless to set it larger.
 439          */
 440         if (pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
 441                 CERROR("%s: cannot set max_read_ahead_whole_mb=%llu > max_read_ahead_per_file_mb=%lu\n",
 442                        sbi->ll_fsname, PAGES_TO_MiB(pages_number),
 443                        PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages_per_file));
 444
 445                 return -ERANGE;
 446         }
 447
 448         spin_lock(&sbi->ll_lock);
 449         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 450         spin_unlock(&sbi->ll_lock);
 451
 452         return count;
 453 }
 454 LUSTRE_RW_ATTR(max_read_ahead_whole_mb);
 455
 456 static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v)
 457 {
 458         struct super_block     *sb    = m->private;
 459         struct ll_sb_info      *sbi   = ll_s2sbi(sb);
 460         struct cl_client_cache *cache = sbi->ll_cache;
 461         struct ll_ra_info *ra = &sbi->ll_ra_info;
 462         long max_cached_mb;
 463         long unused_mb;
 464
 465         mutex_lock(&cache->ccc_max_cache_mb_lock);
 466         max_cached_mb = PAGES_TO_MiB(cache->ccc_lru_max);
 467         unused_mb = PAGES_TO_MiB(atomic_long_read(&cache->ccc_lru_left));
 468         mutex_unlock(&cache->ccc_max_cache_mb_lock);
 469
 470         seq_printf(m, "users: %d\n"
 471                       "max_cached_mb: %ld\n"
 472                       "used_mb: %ld\n"
 473                       "unused_mb: %ld\n"
 474                       "reclaim_count: %u\n"
 475                       "max_read_ahead_mb: %lu\n"
 476                       "used_read_ahead_mb: %d\n",
 477                    refcount_read(&cache->ccc_users),
 478                    max_cached_mb,
 479                    max_cached_mb - unused_mb,
 480                    unused_mb,
 481                    cache->ccc_lru_shrinkers,
 482                    PAGES_TO_MiB(ra->ra_max_pages),
 483                    PAGES_TO_MiB(atomic_read(&ra->ra_cur_pages)));
 484         return 0;
 485 }
 486
 487 static ssize_t ll_max_cached_mb_seq_write(struct file *file,
 488                                           const char __user *buffer,
 489                                           size_t count, loff_t *off)
 490 {
 491         struct seq_file *m = file->private_data;
 492         struct super_block *sb = m->private;
 493         struct ll_sb_info *sbi = ll_s2sbi(sb);
 494         struct cl_client_cache *cache = sbi->ll_cache;
 495         struct lu_env *env;
 496         long diff = 0;
 497         long nrpages = 0;
 498         __u16 refcheck;
 499         u64 value;
 500         u64 pages_number;
 501         int rc;
 502         char kernbuf[128], *ptr;
 503         bool percent = false;
 504
 505         ENTRY;
 506         if (count >= sizeof(kernbuf))
 507                 RETURN(-EINVAL);
 508
 509         if (copy_from_user(kernbuf, buffer, count))
 510                 RETURN(-EFAULT);
 511
 512         if (count > 0 && kernbuf[count - 1] == '%') {
 513                 percent = true;
 514                 /* strip off the % */
 515                 kernbuf[count - 1] = '\0';
 516         } else {
 517                 kernbuf[count] = '\0';
 518         }
 519
 520         ptr = lprocfs_find_named_value(kernbuf, "max_cached_mb:", &count);
 521         if (percent)
 522                 rc = sysfs_memparse(ptr, count, &value, "B");
 523         else
 524                 rc = sysfs_memparse(ptr, count, &value, "MiB");
 525         if (rc)
 526                 RETURN(rc);
 527
 528         if (percent)
 529                 pages_number = cfs_totalram_pages() * value / 100;
 530         else
 531                 pages_number = value >> PAGE_SHIFT;
 532
 533         if (pages_number < 0 || pages_number > cfs_totalram_pages()) {
 534                 CERROR("%s: can't set max cache more than %lu MB\n",
 535                        sbi->ll_fsname,
 536                        PAGES_TO_MiB(cfs_totalram_pages()));
 537                 RETURN(-ERANGE);
 538         }
 539         /* Allow enough cache so clients can make well-formed RPCs */
 540         pages_number = max_t(long, pages_number, PTLRPC_MAX_BRW_PAGES);
 541
 542         mutex_lock(&cache->ccc_max_cache_mb_lock);
 543         diff = pages_number - cache->ccc_lru_max;
 544
 545         /* easy - add more LRU slots. */
 546         if (diff >= 0) {
 547                 atomic_long_add(diff, &cache->ccc_lru_left);
 548                 GOTO(out, rc = 0);
 549         }
 550
 551         env = cl_env_get(&refcheck);
 552         if (IS_ERR(env))
 553                 GOTO(out_unlock, rc = PTR_ERR(env));
 554
 555         diff = -diff;
 556         while (diff > 0) {
 557                 long tmp;
 558
 559                 /* reduce LRU budget from free slots. */
 560                 do {
 561                         long lru_left_old, lru_left_new, lru_left_ret;
 562
 563                         lru_left_old = atomic_long_read(&cache->ccc_lru_left);
 564                         if (lru_left_old == 0)
 565                                 break;
 566
 567                         lru_left_new = lru_left_old > diff ?
 568                                         lru_left_old - diff : 0;
 569                         lru_left_ret =
 570                                 atomic_long_cmpxchg(&cache->ccc_lru_left,
 571                                                     lru_left_old,
 572                                                     lru_left_new);
 573                         if (likely(lru_left_old == lru_left_ret)) {
 574                                 diff -= lru_left_old - lru_left_new;
 575                                 nrpages += lru_left_old - lru_left_new;
 576                                 break;
 577                         }
 578                 } while (1);
 579
 580                 if (diff <= 0)
 581                         break;
 582
 583                 if (sbi->ll_dt_exp == NULL) { /* being initialized */
 584                         rc = -ENODEV;
 585                         break;
 586                 }
 587
 588                 /* Request extra free slots to avoid them all being used
 589                  * by other processes before this can continue shrinking.
 590                  */
 591                 tmp = diff + min_t(long, diff, MiB_TO_PAGES(1024));
 592                 /* difficult - have to ask OSCs to drop LRU slots. */
 593                 rc = obd_set_info_async(env, sbi->ll_dt_exp,
 594                                 sizeof(KEY_CACHE_LRU_SHRINK),
 595                                 KEY_CACHE_LRU_SHRINK,
 596                                 sizeof(tmp), &tmp, NULL);
 597                 if (rc < 0)
 598                         break;
 599         }
 600         cl_env_put(env, &refcheck);
 601
 602 out:
 603         if (rc >= 0) {
 604                 cache->ccc_lru_max = pages_number;
 605                 rc = count;
 606         } else {
 607                 atomic_long_add(nrpages, &cache->ccc_lru_left);
 608         }
 609 out_unlock:
 610         mutex_unlock(&cache->ccc_max_cache_mb_lock);
 611         return rc;
 612 }
 613 LDEBUGFS_SEQ_FOPS(ll_max_cached_mb);
 614
 615 static ssize_t checksums_show(struct kobject *kobj, struct attribute *attr,
 616                               char *buf)
 617 {
 618         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 619                                               ll_kset.kobj);
 620
 621         return scnprintf(buf, PAGE_SIZE, "%u\n",
 622                          test_bit(LL_SBI_CHECKSUM, sbi->ll_flags));
 623 }
 624
 625 static ssize_t checksums_store(struct kobject *kobj, struct attribute *attr,
 626                                const char *buffer, size_t count)
 627 {
 628         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 629                                               ll_kset.kobj);
 630         bool val;
 631         int tmp;
 632         int rc;
 633
 634         if (!sbi->ll_dt_exp)
 635                 /* Not set up yet */
 636                 return -EAGAIN;
 637
 638         rc = kstrtobool(buffer, &val);
 639         if (rc)
 640                 return rc;
 641         if (val)
 642                 set_bit(LL_SBI_CHECKSUM, sbi->ll_flags);
 643         else
 644                 clear_bit(LL_SBI_CHECKSUM, sbi->ll_flags);
 645         tmp = val;
 646
 647         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 648                                 KEY_CHECKSUM, sizeof(tmp), &tmp, NULL);
 649         if (rc)
 650                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 651
 652         return count;
 653 }
 654 LUSTRE_RW_ATTR(checksums);
 655
 656 LUSTRE_ATTR(checksum_pages, 0644, checksums_show, checksums_store);
 657
 658 static ssize_t ll_rd_track_id(struct kobject *kobj, char *buf,
 659                               enum stats_track_type type)
 660 {
 661         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 662                                               ll_kset.kobj);
 663
 664         if (sbi->ll_stats_track_type == type)
 665                 return sprintf(buf, "%d\n", sbi->ll_stats_track_id);
 666         else if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 667                 return sprintf(buf, "0 (all)\n");
 668
 669         return sprintf(buf, "untracked\n");
 670 }
 671
 672 static ssize_t ll_wr_track_id(struct kobject *kobj, const char *buffer,
 673                               size_t count, enum stats_track_type type)
 674 {
 675         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 676                                               ll_kset.kobj);
 677         unsigned long pid;
 678         int rc;
 679
 680         rc = kstrtoul(buffer, 10, &pid);
 681         if (rc)
 682                 return rc;
 683
 684         sbi->ll_stats_track_id = pid;
 685         if (pid == 0)
 686                 sbi->ll_stats_track_type = STATS_TRACK_ALL;
 687         else
 688                 sbi->ll_stats_track_type = type;
 689         lprocfs_stats_clear(sbi->ll_stats);
 690         return count;
 691 }
 692
 693 static ssize_t stats_track_pid_show(struct kobject *kobj,
 694                                     struct attribute *attr,
 695                                     char *buf)
 696 {
 697         return ll_rd_track_id(kobj, buf, STATS_TRACK_PID);
 698 }
 699
 700 static ssize_t stats_track_pid_store(struct kobject *kobj,
 701                                      struct attribute *attr,
 702                                      const char *buffer,
 703                                      size_t count)
 704 {
 705         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PID);
 706 }
 707 LUSTRE_RW_ATTR(stats_track_pid);
 708
 709 static ssize_t stats_track_ppid_show(struct kobject *kobj,
 710                                      struct attribute *attr,
 711                                      char *buf)
 712 {
 713         return ll_rd_track_id(kobj, buf, STATS_TRACK_PPID);
 714 }
 715
 716 static ssize_t stats_track_ppid_store(struct kobject *kobj,
 717                                       struct attribute *attr,
 718                                       const char *buffer,
 719                                       size_t count)
 720 {
 721         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PPID);
 722 }
 723 LUSTRE_RW_ATTR(stats_track_ppid);
 724
 725 static ssize_t stats_track_gid_show(struct kobject *kobj,
 726                                     struct attribute *attr,
 727                                     char *buf)
 728 {
 729         return ll_rd_track_id(kobj, buf, STATS_TRACK_GID);
 730 }
 731
 732 static ssize_t stats_track_gid_store(struct kobject *kobj,
 733                                      struct attribute *attr,
 734                                      const char *buffer,
 735                                      size_t count)
 736 {
 737         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_GID);
 738 }
 739 LUSTRE_RW_ATTR(stats_track_gid);
 740
 741 static ssize_t enable_statahead_fname_show(struct kobject *kobj,
 742                                            struct attribute *attr,
 743                                            char *buf)
 744 {
 745         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 746                                               ll_kset.kobj);
 747
 748         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_enable_statahead_fname);
 749 }
 750
 751 static ssize_t enable_statahead_fname_store(struct kobject *kobj,
 752                                             struct attribute *attr,
 753                                             const char *buffer,
 754                                             size_t count)
 755 {
 756         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 757                                               ll_kset.kobj);
 758         bool val;
 759         int rc;
 760
 761         rc = kstrtobool(buffer, &val);
 762         if (rc)
 763                 return rc;
 764
 765         sbi->ll_enable_statahead_fname = val;
 766
 767         return count;
 768 }
 769 LUSTRE_RW_ATTR(enable_statahead_fname);
 770
 771 static ssize_t statahead_running_max_show(struct kobject *kobj,
 772                                           struct attribute *attr,
 773                                           char *buf)
 774 {
 775         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 776                                               ll_kset.kobj);
 777
 778         return scnprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_sa_running_max);
 779 }
 780
 781 static ssize_t statahead_running_max_store(struct kobject *kobj,
 782                                            struct attribute *attr,
 783                                            const char *buffer,
 784                                            size_t count)
 785 {
 786         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 787                                               ll_kset.kobj);
 788         unsigned long val;
 789         int rc;
 790
 791         rc = kstrtoul(buffer, 0, &val);
 792         if (rc)
 793                 return rc;
 794
 795         if (val <= LL_SA_RUNNING_MAX) {
 796                 sbi->ll_sa_running_max = val;
 797                 return count;
 798         }
 799
 800         CERROR("Bad statahead_running_max value %lu. Valid values "
 801                "are in the range [0, %d]\n", val, LL_SA_RUNNING_MAX);
 802
 803         return -ERANGE;
 804 }
 805 LUSTRE_RW_ATTR(statahead_running_max);
 806
 807 static ssize_t statahead_batch_max_show(struct kobject *kobj,
 808                                         struct attribute *attr,
 809                                         char *buf)
 810 {
 811         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 812                                               ll_kset.kobj);
 813
 814         return snprintf(buf, 16, "%u\n", sbi->ll_sa_batch_max);
 815 }
 816
 817 static ssize_t statahead_batch_max_store(struct kobject *kobj,
 818                                          struct attribute *attr,
 819                                          const char *buffer,
 820                                          size_t count)
 821 {
 822         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 823                                               ll_kset.kobj);
 824         unsigned long val;
 825         int rc;
 826
 827         rc = kstrtoul(buffer, 0, &val);
 828         if (rc)
 829                 return rc;
 830
 831         if (val > LL_SA_BATCH_MAX) {
 832                 CWARN("%s: statahead_batch_max value %lu limited to maximum %d\n",
 833                       sbi->ll_fsname, val, LL_SA_BATCH_MAX);
 834                 val = LL_SA_BATCH_MAX;
 835         }
 836
 837         sbi->ll_sa_batch_max = val;
 838         return count;
 839 }
 840 LUSTRE_RW_ATTR(statahead_batch_max);
 841
 842 static ssize_t statahead_max_show(struct kobject *kobj,
 843                                   struct attribute *attr,
 844                                   char *buf)
 845 {
 846         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 847                                               ll_kset.kobj);
 848
 849         return sprintf(buf, "%u\n", sbi->ll_sa_max);
 850 }
 851
 852 static ssize_t statahead_max_store(struct kobject *kobj,
 853                                    struct attribute *attr,
 854                                    const char *buffer,
 855                                    size_t count)
 856 {
 857         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 858                                               ll_kset.kobj);
 859         unsigned long val;
 860         int rc;
 861
 862         rc = kstrtoul(buffer, 0, &val);
 863         if (rc)
 864                 return rc;
 865
 866         if (val > LL_SA_REQ_MAX) {
 867                 CWARN("%s: statahead_max value %lu limited to maximum %d\n",
 868                       sbi->ll_fsname, val, LL_SA_REQ_MAX);
 869                 val = LL_SA_REQ_MAX;
 870         }
 871
 872         sbi->ll_sa_max = val;
 873         return count;
 874 }
 875 LUSTRE_RW_ATTR(statahead_max);
 876
 877 static ssize_t statahead_min_show(struct kobject *kobj,
 878                                   struct attribute *attr,
 879                                   char *buf)
 880 {
 881         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 882                                               ll_kset.kobj);
 883
 884         return scnprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_sa_min);
 885 }
 886
 887 static ssize_t statahead_min_store(struct kobject *kobj,
 888                                    struct attribute *attr,
 889                                    const char *buffer,
 890                                    size_t count)
 891 {
 892         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 893                                               ll_kset.kobj);
 894         unsigned long val;
 895         int rc;
 896
 897         rc = kstrtoul(buffer, 0, &val);
 898         if (rc)
 899                 return rc;
 900
 901         if (val < LL_SA_REQ_MIN)
 902                 CERROR("%s: bad statahead_min %lu < min %u\n",
 903                        sbi->ll_fsname, val, LL_SA_REQ_MIN);
 904         else if (val > sbi->ll_sa_max)
 905                 CERROR("%s: bad statahead_min %lu > max %u\n",
 906                        sbi->ll_fsname, val, sbi->ll_sa_max);
 907         else
 908                 sbi->ll_sa_min = val;
 909
 910         return count;
 911 }
 912 LUSTRE_RW_ATTR(statahead_min);
 913
 914 static ssize_t statahead_timeout_show(struct kobject *kobj,
 915                                       struct attribute *attr,
 916                                       char *buf)
 917 {
 918         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 919                                               ll_kset.kobj);
 920
 921         return scnprintf(buf, PAGE_SIZE, "%lu\n", sbi->ll_sa_timeout);
 922 }
 923
 924 static ssize_t statahead_timeout_store(struct kobject *kobj,
 925                                        struct attribute *attr,
 926                                        const char *buffer,
 927                                        size_t count)
 928 {
 929         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 930                                               ll_kset.kobj);
 931         unsigned long val;
 932         int rc;
 933
 934         rc = kstrtoul(buffer, 0, &val);
 935         if (rc)
 936                 return rc;
 937
 938         sbi->ll_sa_timeout = val;
 939         return count;
 940 }
 941 LUSTRE_RW_ATTR(statahead_timeout);
 942
 943 static ssize_t statahead_agl_show(struct kobject *kobj,
 944                                   struct attribute *attr,
 945                                   char *buf)
 946 {
 947         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 948                                               ll_kset.kobj);
 949
 950         return scnprintf(buf, PAGE_SIZE, "%u\n",
 951                          test_bit(LL_SBI_AGL_ENABLED, sbi->ll_flags));
 952 }
 953
 954 static ssize_t statahead_agl_store(struct kobject *kobj,
 955                                    struct attribute *attr,
 956                                    const char *buffer,
 957                                    size_t count)
 958 {
 959         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 960                                               ll_kset.kobj);
 961         bool val;
 962         int rc;
 963
 964         rc = kstrtobool(buffer, &val);
 965         if (rc)
 966                 return rc;
 967
 968         if (val)
 969                 set_bit(LL_SBI_AGL_ENABLED, sbi->ll_flags);
 970         else
 971                 clear_bit(LL_SBI_AGL_ENABLED, sbi->ll_flags);
 972
 973         return count;
 974 }
 975 LUSTRE_RW_ATTR(statahead_agl);
 976
 977 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
 978 {
 979         struct super_block *sb = m->private;
 980         struct ll_sb_info *sbi = ll_s2sbi(sb);
 981
 982         seq_printf(m, "statahead total: %u\n"
 983                       "statahead wrong: %u\n"
 984                       "agl total: %u\n"
 985                       "list_total: %u\n"
 986                       "fname_total: %u\n"
 987                       "hit_total: %u\n"
 988                       "miss_total: %u\n",
 989                    atomic_read(&sbi->ll_sa_total),
 990                    atomic_read(&sbi->ll_sa_wrong),
 991                    atomic_read(&sbi->ll_agl_total),
 992                    atomic_read(&sbi->ll_sa_list_total),
 993                    atomic_read(&sbi->ll_sa_fname_total),
 994                    atomic_read(&sbi->ll_sa_hit_total),
 995                    atomic_read(&sbi->ll_sa_miss_total));
 996         return 0;
 997 }
 998
 999 static ssize_t ll_statahead_stats_seq_write(struct file *file,
1000                                             const char __user *buffer,
1001                                             size_t count, loff_t *off)
1002 {
1003         struct seq_file *m = file->private_data;
1004         struct super_block *sb = m->private;
1005         struct ll_sb_info *sbi = ll_s2sbi(sb);
1006
1007         atomic_set(&sbi->ll_sa_total, 0);
1008         atomic_set(&sbi->ll_sa_wrong, 0);
1009         atomic_set(&sbi->ll_agl_total, 0);
1010         atomic_set(&sbi->ll_sa_list_total, 0);
1011         atomic_set(&sbi->ll_sa_fname_total, 0);
1012         atomic_set(&sbi->ll_sa_hit_total, 0);
1013         atomic_set(&sbi->ll_sa_miss_total, 0);
1014
1015         return count;
1016 }
1017 LDEBUGFS_SEQ_FOPS(ll_statahead_stats);
1018
1019 static ssize_t lazystatfs_show(struct kobject *kobj,
1020                                struct attribute *attr,
1021                                char *buf)
1022 {
1023         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1024                                               ll_kset.kobj);
1025
1026         return scnprintf(buf, PAGE_SIZE, "%u\n",
1027                          test_bit(LL_SBI_LAZYSTATFS, sbi->ll_flags));
1028 }
1029
1030 static ssize_t lazystatfs_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)
1045                 set_bit(LL_SBI_LAZYSTATFS, sbi->ll_flags);
1046         else
1047                 clear_bit(LL_SBI_LAZYSTATFS, sbi->ll_flags);
1048
1049         return count;
1050 }
1051 LUSTRE_RW_ATTR(lazystatfs);
1052
1053 static ssize_t statfs_max_age_show(struct kobject *kobj, struct attribute *attr,
1054                                    char *buf)
1055 {
1056         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1057                                               ll_kset.kobj);
1058
1059         return scnprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_statfs_max_age);
1060 }
1061
1062 static ssize_t statfs_max_age_store(struct kobject *kobj,
1063                                     struct attribute *attr, const char *buffer,
1064                                     size_t count)
1065 {
1066         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1067                                               ll_kset.kobj);
1068         unsigned int val;
1069         int rc;
1070
1071         rc = kstrtouint(buffer, 10, &val);
1072         if (rc)
1073                 return rc;
1074         if (val > OBD_STATFS_CACHE_MAX_AGE)
1075                 return -EINVAL;
1076
1077         sbi->ll_statfs_max_age = val;
1078
1079         return count;
1080 }
1081 LUSTRE_RW_ATTR(statfs_max_age);
1082
1083 static ssize_t statfs_project_show(struct kobject *kobj,
1084                                   struct attribute *attr,
1085                                   char *buf)
1086 {
1087         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1088                                               ll_kset.kobj);
1089
1090         return scnprintf(buf, PAGE_SIZE, "%u\n",
1091                          test_bit(LL_SBI_STATFS_PROJECT, sbi->ll_flags));
1092 }
1093
1094 static ssize_t statfs_project_store(struct kobject *kobj,
1095                                    struct attribute *attr,
1096                                    const char *buffer,
1097                                    size_t count)
1098 {
1099         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1100                                               ll_kset.kobj);
1101         bool val;
1102         int rc;
1103
1104         rc = kstrtobool(buffer, &val);
1105         if (rc)
1106                 return rc;
1107
1108         if (val)
1109                 set_bit(LL_SBI_STATFS_PROJECT, sbi->ll_flags);
1110         else
1111                 clear_bit(LL_SBI_STATFS_PROJECT, sbi->ll_flags);
1112
1113         return count;
1114 }
1115 LUSTRE_RW_ATTR(statfs_project);
1116
1117 static ssize_t max_easize_show(struct kobject *kobj,
1118                                struct attribute *attr,
1119                                char *buf)
1120 {
1121         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1122                                               ll_kset.kobj);
1123         unsigned int ealen;
1124         int rc;
1125
1126         rc = ll_get_max_mdsize(sbi, &ealen);
1127         if (rc)
1128                 return rc;
1129
1130         /* Limit xattr size returned to userspace based on kernel maximum */
1131         return scnprintf(buf, PAGE_SIZE, "%u\n",
1132                          ealen > XATTR_SIZE_MAX ? XATTR_SIZE_MAX : ealen);
1133 }
1134 LUSTRE_RO_ATTR(max_easize);
1135
1136 /**
1137  * Get default_easize.
1138  *
1139  * \see client_obd::cl_default_mds_easize
1140  *
1141  * \param[in] m         seq_file handle
1142  * \param[in] v         unused for single entry
1143  *
1144  * \retval 0            on success
1145  * \retval negative     negated errno on failure
1146  */
1147 static ssize_t default_easize_show(struct kobject *kobj,
1148                                    struct attribute *attr,
1149                                    char *buf)
1150 {
1151         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1152                                               ll_kset.kobj);
1153         unsigned int ealen;
1154         int rc;
1155
1156         rc = ll_get_default_mdsize(sbi, &ealen);
1157         if (rc)
1158                 return rc;
1159
1160         /* Limit xattr size returned to userspace based on kernel maximum */
1161         return scnprintf(buf, PAGE_SIZE, "%u\n",
1162                          ealen > XATTR_SIZE_MAX ? XATTR_SIZE_MAX : ealen);
1163 }
1164
1165 /**
1166  * Set default_easize.
1167  *
1168  * Range checking on the passed value is handled by
1169  * ll_set_default_mdsize().
1170  *
1171  * \see client_obd::cl_default_mds_easize
1172  *
1173  * \param[in] file      proc file
1174  * \param[in] buffer    string passed from user space
1175  * \param[in] count     \a buffer length
1176  * \param[in] off       unused for single entry
1177  *
1178  * \retval positive     \a count on success
1179  * \retval negative     negated errno on failure
1180  */
1181 static ssize_t default_easize_store(struct kobject *kobj,
1182                                     struct attribute *attr,
1183                                     const char *buffer,
1184                                     size_t count)
1185 {
1186         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1187                                               ll_kset.kobj);
1188         unsigned int val;
1189         int rc;
1190
1191         if (count == 0)
1192                 return 0;
1193
1194         rc = kstrtouint(buffer, 10, &val);
1195         if (rc)
1196                 return rc;
1197
1198         rc = ll_set_default_mdsize(sbi, val);
1199         if (rc)
1200                 return rc;
1201
1202         return count;
1203 }
1204 LUSTRE_RW_ATTR(default_easize);
1205
1206 LDEBUGFS_SEQ_FOPS_RO(ll_sbi_flags);
1207
1208 static ssize_t xattr_cache_show(struct kobject *kobj,
1209                                 struct attribute *attr,
1210                                 char *buf)
1211 {
1212         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1213                                               ll_kset.kobj);
1214
1215         return sprintf(buf, "%u\n", sbi->ll_xattr_cache_enabled);
1216 }
1217
1218 static ssize_t xattr_cache_store(struct kobject *kobj,
1219                                  struct attribute *attr,
1220                                  const char *buffer,
1221                                  size_t count)
1222 {
1223         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1224                                               ll_kset.kobj);
1225         bool val;
1226         int rc;
1227
1228         rc = kstrtobool(buffer, &val);
1229         if (rc)
1230                 return rc;
1231
1232         if (val && !test_bit(LL_SBI_XATTR_CACHE, sbi->ll_flags))
1233                 return -EOPNOTSUPP;
1234
1235         sbi->ll_xattr_cache_enabled = val;
1236         sbi->ll_xattr_cache_set = 1;
1237
1238         return count;
1239 }
1240 LUSTRE_RW_ATTR(xattr_cache);
1241
1242 static ssize_t tiny_write_show(struct kobject *kobj,
1243                                struct attribute *attr,
1244                                char *buf)
1245 {
1246         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1247                                               ll_kset.kobj);
1248
1249         return scnprintf(buf, PAGE_SIZE, "%u\n",
1250                          test_bit(LL_SBI_TINY_WRITE, sbi->ll_flags));
1251 }
1252
1253 static ssize_t tiny_write_store(struct kobject *kobj,
1254                                 struct attribute *attr,
1255                                 const char *buffer,
1256                                 size_t count)
1257 {
1258         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1259                                               ll_kset.kobj);
1260         bool val;
1261         int rc;
1262
1263         rc = kstrtobool(buffer, &val);
1264         if (rc)
1265                 return rc;
1266
1267         spin_lock(&sbi->ll_lock);
1268         if (val)
1269                 set_bit(LL_SBI_TINY_WRITE, sbi->ll_flags);
1270         else
1271                 clear_bit(LL_SBI_TINY_WRITE, sbi->ll_flags);
1272         spin_unlock(&sbi->ll_lock);
1273
1274         return count;
1275 }
1276 LUSTRE_RW_ATTR(tiny_write);
1277
1278 static ssize_t unaligned_dio_show(struct kobject *kobj,
1279                                   struct attribute *attr,
1280                                   char *buf)
1281 {
1282         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1283                                               ll_kset.kobj);
1284
1285         return scnprintf(buf, PAGE_SIZE, "%u\n",
1286                          test_bit(LL_SBI_UNALIGNED_DIO, sbi->ll_flags));
1287 }
1288
1289 static ssize_t unaligned_dio_store(struct kobject *kobj,
1290                                    struct attribute *attr,
1291                                    const char *buffer,
1292                                    size_t count)
1293 {
1294         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1295                                               ll_kset.kobj);
1296         bool val;
1297         int rc;
1298
1299         rc = kstrtobool(buffer, &val);
1300         if (rc)
1301                 return rc;
1302
1303         spin_lock(&sbi->ll_lock);
1304         if (val)
1305                 set_bit(LL_SBI_UNALIGNED_DIO, sbi->ll_flags);
1306         else
1307                 clear_bit(LL_SBI_UNALIGNED_DIO, sbi->ll_flags);
1308         spin_unlock(&sbi->ll_lock);
1309
1310         return count;
1311 }
1312 LUSTRE_RW_ATTR(unaligned_dio);
1313
1314 static ssize_t parallel_dio_show(struct kobject *kobj,
1315                                  struct attribute *attr,
1316                                  char *buf)
1317 {
1318         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1319                                               ll_kset.kobj);
1320
1321         return snprintf(buf, PAGE_SIZE, "%u\n",
1322                         test_bit(LL_SBI_PARALLEL_DIO, sbi->ll_flags));
1323 }
1324
1325 static ssize_t parallel_dio_store(struct kobject *kobj,
1326                                   struct attribute *attr,
1327                                   const char *buffer,
1328                                   size_t count)
1329 {
1330         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1331                                               ll_kset.kobj);
1332         bool val;
1333         int rc;
1334
1335         rc = kstrtobool(buffer, &val);
1336         if (rc)
1337                 return rc;
1338
1339         spin_lock(&sbi->ll_lock);
1340         if (val)
1341                 set_bit(LL_SBI_PARALLEL_DIO, sbi->ll_flags);
1342         else
1343                 clear_bit(LL_SBI_PARALLEL_DIO, sbi->ll_flags);
1344         spin_unlock(&sbi->ll_lock);
1345
1346         return count;
1347 }
1348 LUSTRE_RW_ATTR(parallel_dio);
1349
1350 static ssize_t hybrid_io_show(struct kobject *kobj, struct attribute *attr,
1351                               char *buf)
1352 {
1353         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1354                                               ll_kset.kobj);
1355
1356         return snprintf(buf, PAGE_SIZE, "%u\n",
1357                         test_bit(LL_SBI_HYBRID_IO, sbi->ll_flags));
1358 }
1359
1360 static ssize_t hybrid_io_store(struct kobject *kobj, struct attribute *attr,
1361                                const char *buffer, size_t count)
1362 {
1363         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1364                                               ll_kset.kobj);
1365         bool val;
1366         int rc;
1367
1368         rc = kstrtobool(buffer, &val);
1369         if (rc)
1370                 return rc;
1371
1372         spin_lock(&sbi->ll_lock);
1373         if (val)
1374                 set_bit(LL_SBI_HYBRID_IO, sbi->ll_flags);
1375         else
1376                 clear_bit(LL_SBI_HYBRID_IO, sbi->ll_flags);
1377         spin_unlock(&sbi->ll_lock);
1378
1379         return count;
1380 }
1381 LUSTRE_RW_ATTR(hybrid_io);
1382
1383 static ssize_t max_read_ahead_async_active_show(struct kobject *kobj,
1384                                                struct attribute *attr,
1385                                                char *buf)
1386 {
1387         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1388                                               ll_kset.kobj);
1389
1390         return scnprintf(buf, PAGE_SIZE, "%u\n",
1391                          sbi->ll_ra_info.ra_async_max_active);
1392 }
1393
1394 static ssize_t max_read_ahead_async_active_store(struct kobject *kobj,
1395                                                  struct attribute *attr,
1396                                                  const char *buffer,
1397                                                  size_t count)
1398 {
1399         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1400                                               ll_kset.kobj);
1401         unsigned int val;
1402         int rc;
1403
1404         rc = kstrtouint(buffer, 10, &val);
1405         if (rc)
1406                 return rc;
1407
1408         /**
1409          * It doesn't make any sense to make it exceed what
1410          * workqueue could acutally support. This can easily
1411          * over subscripe the cores but Lustre internally
1412          * throttles to avoid those impacts.
1413          */
1414         if (val > WQ_UNBOUND_MAX_ACTIVE) {
1415                 CERROR("%s: cannot set max_read_ahead_async_active=%u larger than %u\n",
1416                        sbi->ll_fsname, val, WQ_UNBOUND_MAX_ACTIVE);
1417                 return -ERANGE;
1418         }
1419
1420         spin_lock(&sbi->ll_lock);
1421         sbi->ll_ra_info.ra_async_max_active = val;
1422         spin_unlock(&sbi->ll_lock);
1423
1424         return count;
1425 }
1426 LUSTRE_RW_ATTR(max_read_ahead_async_active);
1427
1428 static ssize_t read_ahead_async_file_threshold_mb_show(struct kobject *kobj,
1429                                                        struct attribute *attr,
1430                                                        char *buf)
1431 {
1432         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1433                                               ll_kset.kobj);
1434
1435         return scnprintf(buf, PAGE_SIZE, "%lu\n", PAGES_TO_MiB(
1436                          sbi->ll_ra_info.ra_async_pages_per_file_threshold));
1437 }
1438
1439 static ssize_t
1440 read_ahead_async_file_threshold_mb_store(struct kobject *kobj,
1441                                          struct attribute *attr,
1442                                          const char *buffer, size_t count)
1443 {
1444         unsigned long pages_number;
1445         unsigned long max_ra_per_file;
1446         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1447                                               ll_kset.kobj);
1448         int rc;
1449
1450         rc = kstrtoul(buffer, 10, &pages_number);
1451         if (rc)
1452                 return rc;
1453
1454         pages_number = MiB_TO_PAGES(pages_number);
1455         max_ra_per_file = sbi->ll_ra_info.ra_max_pages_per_file;
1456         if (pages_number < 0 || pages_number > max_ra_per_file) {
1457                 CERROR("%s: can't set read_ahead_async_file_threshold_mb=%lu > "
1458                        "max_read_readahead_per_file_mb=%lu\n", sbi->ll_fsname,
1459                        PAGES_TO_MiB(pages_number),
1460                        PAGES_TO_MiB(max_ra_per_file));
1461                 return -ERANGE;
1462         }
1463         sbi->ll_ra_info.ra_async_pages_per_file_threshold = pages_number;
1464
1465         return count;
1466 }
1467 LUSTRE_RW_ATTR(read_ahead_async_file_threshold_mb);
1468
1469 static ssize_t read_ahead_range_kb_show(struct kobject *kobj,
1470                                         struct attribute *attr, char *buf)
1471 {
1472         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1473                                               ll_kset.kobj);
1474
1475         return snprintf(buf, PAGE_SIZE, "%lu\n",
1476                         sbi->ll_ra_info.ra_range_pages << (PAGE_SHIFT - 10));
1477 }
1478
1479 static ssize_t
1480 read_ahead_range_kb_store(struct kobject *kobj,
1481                                struct attribute *attr,
1482                                const char *buffer, size_t count)
1483 {
1484         unsigned long pages_number;
1485         unsigned long max_ra_per_file;
1486         u64 val;
1487         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1488                                               ll_kset.kobj);
1489         int rc;
1490
1491         rc = sysfs_memparse(buffer, count, &val, "KiB");
1492         if (rc < 0)
1493                 return rc;
1494
1495         pages_number = val >> PAGE_SHIFT;
1496         /* Disable mmap range read */
1497         if (pages_number == 0)
1498                 goto out;
1499
1500         max_ra_per_file = sbi->ll_ra_info.ra_max_pages_per_file;
1501         if (pages_number > max_ra_per_file ||
1502             pages_number < RA_MIN_MMAP_RANGE_PAGES)
1503                 return -ERANGE;
1504
1505 out:
1506         spin_lock(&sbi->ll_lock);
1507         sbi->ll_ra_info.ra_range_pages = pages_number;
1508         spin_unlock(&sbi->ll_lock);
1509
1510         return count;
1511 }
1512 LUSTRE_RW_ATTR(read_ahead_range_kb);
1513
1514 static ssize_t fast_read_show(struct kobject *kobj,
1515                               struct attribute *attr,
1516                               char *buf)
1517 {
1518         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1519                                               ll_kset.kobj);
1520
1521         return scnprintf(buf, PAGE_SIZE, "%u\n",
1522                          test_bit(LL_SBI_FAST_READ, sbi->ll_flags));
1523 }
1524
1525 static ssize_t fast_read_store(struct kobject *kobj,
1526                                struct attribute *attr,
1527                                const char *buffer,
1528                                size_t count)
1529 {
1530         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1531                                               ll_kset.kobj);
1532         bool val;
1533         int rc;
1534
1535         rc = kstrtobool(buffer, &val);
1536         if (rc)
1537                 return rc;
1538
1539         spin_lock(&sbi->ll_lock);
1540         if (val)
1541                 set_bit(LL_SBI_FAST_READ, sbi->ll_flags);
1542         else
1543                 clear_bit(LL_SBI_FAST_READ, sbi->ll_flags);
1544         spin_unlock(&sbi->ll_lock);
1545
1546         return count;
1547 }
1548 LUSTRE_RW_ATTR(fast_read);
1549
1550 static ssize_t file_heat_show(struct kobject *kobj,
1551                               struct attribute *attr,
1552                               char *buf)
1553 {
1554         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1555                                               ll_kset.kobj);
1556
1557         return scnprintf(buf, PAGE_SIZE, "%u\n",
1558                          test_bit(LL_SBI_FILE_HEAT, sbi->ll_flags));
1559 }
1560
1561 static ssize_t file_heat_store(struct kobject *kobj,
1562                                struct attribute *attr,
1563                                const char *buffer,
1564                                size_t count)
1565 {
1566         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1567                                               ll_kset.kobj);
1568         bool val;
1569         int rc;
1570
1571         rc = kstrtobool(buffer, &val);
1572         if (rc)
1573                 return rc;
1574
1575         spin_lock(&sbi->ll_lock);
1576         if (val)
1577                 set_bit(LL_SBI_FILE_HEAT, sbi->ll_flags);
1578         else
1579                 clear_bit(LL_SBI_FILE_HEAT, sbi->ll_flags);
1580         spin_unlock(&sbi->ll_lock);
1581
1582         return count;
1583 }
1584 LUSTRE_RW_ATTR(file_heat);
1585
1586 static ssize_t heat_decay_percentage_show(struct kobject *kobj,
1587                                           struct attribute *attr,
1588                                           char *buf)
1589 {
1590         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1591                                               ll_kset.kobj);
1592
1593         return scnprintf(buf, PAGE_SIZE, "%u\n",
1594                          (sbi->ll_heat_decay_weight * 100 + 128) / 256);
1595 }
1596
1597 static ssize_t heat_decay_percentage_store(struct kobject *kobj,
1598                                            struct attribute *attr,
1599                                            const char *buffer,
1600                                            size_t count)
1601 {
1602         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1603                                               ll_kset.kobj);
1604         unsigned long val;
1605         int rc;
1606
1607         rc = kstrtoul(buffer, 10, &val);
1608         if (rc)
1609                 return rc;
1610
1611         if (val < 0 || val > 100)
1612                 return -ERANGE;
1613
1614         sbi->ll_heat_decay_weight = (val * 256 + 50) / 100;
1615
1616         return count;
1617 }
1618 LUSTRE_RW_ATTR(heat_decay_percentage);
1619
1620 static ssize_t heat_period_second_show(struct kobject *kobj,
1621                                        struct attribute *attr,
1622                                        char *buf)
1623 {
1624         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1625                                               ll_kset.kobj);
1626
1627         return scnprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_heat_period_second);
1628 }
1629
1630 static ssize_t heat_period_second_store(struct kobject *kobj,
1631                                         struct attribute *attr,
1632                                         const char *buffer,
1633                                         size_t count)
1634 {
1635         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1636                                               ll_kset.kobj);
1637         unsigned long val;
1638         int rc;
1639
1640         rc = kstrtoul(buffer, 10, &val);
1641         if (rc)
1642                 return rc;
1643
1644         if (val <= 0)
1645                 return -ERANGE;
1646
1647         sbi->ll_heat_period_second = val;
1648
1649         return count;
1650 }
1651 LUSTRE_RW_ATTR(heat_period_second);
1652
1653 static ssize_t opencache_threshold_count_show(struct kobject *kobj,
1654                                               struct attribute *attr,
1655                                               char *buf)
1656 {
1657         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1658                                               ll_kset.kobj);
1659
1660         if (sbi->ll_oc_thrsh_count)
1661                 return snprintf(buf, PAGE_SIZE, "%u\n",
1662                                 sbi->ll_oc_thrsh_count);
1663         else
1664                 return snprintf(buf, PAGE_SIZE, "off\n");
1665 }
1666
1667 static ssize_t opencache_threshold_count_store(struct kobject *kobj,
1668                                                struct attribute *attr,
1669                                                const char *buffer,
1670                                                size_t count)
1671 {
1672         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1673                                               ll_kset.kobj);
1674         unsigned int val;
1675         int rc;
1676
1677         rc = kstrtouint(buffer, 10, &val);
1678         if (rc) {
1679                 bool enable;
1680                 /* also accept "off" to disable and "on" to always cache */
1681                 rc = kstrtobool(buffer, &enable);
1682                 if (rc)
1683                         return rc;
1684                 val = enable;
1685         }
1686         sbi->ll_oc_thrsh_count = val;
1687
1688         return count;
1689 }
1690 LUSTRE_RW_ATTR(opencache_threshold_count);
1691
1692 static ssize_t opencache_threshold_ms_show(struct kobject *kobj,
1693                                            struct attribute *attr,
1694                                            char *buf)
1695 {
1696         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1697                                               ll_kset.kobj);
1698
1699         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_oc_thrsh_ms);
1700 }
1701
1702 static ssize_t opencache_threshold_ms_store(struct kobject *kobj,
1703                                             struct attribute *attr,
1704                                             const char *buffer,
1705                                             size_t count)
1706 {
1707         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1708                                               ll_kset.kobj);
1709         unsigned int val;
1710         int rc;
1711
1712         rc = kstrtouint(buffer, 10, &val);
1713         if (rc)
1714                 return rc;
1715
1716         sbi->ll_oc_thrsh_ms = val;
1717
1718         return count;
1719 }
1720 LUSTRE_RW_ATTR(opencache_threshold_ms);
1721
1722 static ssize_t opencache_max_ms_show(struct kobject *kobj,
1723                                      struct attribute *attr,
1724                                      char *buf)
1725 {
1726         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1727                                               ll_kset.kobj);
1728
1729         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_oc_max_ms);
1730 }
1731
1732 static ssize_t opencache_max_ms_store(struct kobject *kobj,
1733                                       struct attribute *attr,
1734                                       const char *buffer,
1735                                       size_t count)
1736 {
1737         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1738                                               ll_kset.kobj);
1739         unsigned int val;
1740         int rc;
1741
1742         rc = kstrtouint(buffer, 10, &val);
1743         if (rc)
1744                 return rc;
1745
1746         sbi->ll_oc_max_ms = val;
1747
1748         return count;
1749 }
1750 LUSTRE_RW_ATTR(opencache_max_ms);
1751
1752 static ssize_t inode_cache_show(struct kobject *kobj,
1753                                 struct attribute *attr,
1754                                 char *buf)
1755 {
1756         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1757                                               ll_kset.kobj);
1758
1759         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_inode_cache_enabled);
1760 }
1761
1762 static ssize_t inode_cache_store(struct kobject *kobj,
1763                                  struct attribute *attr,
1764                                  const char *buffer,
1765                                  size_t count)
1766 {
1767         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1768                                               ll_kset.kobj);
1769         bool val;
1770         int rc;
1771
1772         rc = kstrtobool(buffer, &val);
1773         if (rc)
1774                 return rc;
1775
1776         sbi->ll_inode_cache_enabled = val;
1777
1778         return count;
1779 }
1780 LUSTRE_RW_ATTR(inode_cache);
1781
1782 static int ll_unstable_stats_seq_show(struct seq_file *m, void *v)
1783 {
1784         struct super_block      *sb    = m->private;
1785         struct ll_sb_info       *sbi   = ll_s2sbi(sb);
1786         struct cl_client_cache  *cache = sbi->ll_cache;
1787         long pages;
1788         int mb;
1789
1790         pages = atomic_long_read(&cache->ccc_unstable_nr);
1791         mb    = (pages * PAGE_SIZE) >> 20;
1792
1793         seq_printf(m, "unstable_check:     %8d\n"
1794                       "unstable_pages: %12ld\n"
1795                       "unstable_mb:        %8d\n",
1796                    cache->ccc_unstable_check, pages, mb);
1797         return 0;
1798 }
1799
1800 static ssize_t ll_unstable_stats_seq_write(struct file *file,
1801                                            const char __user *buffer,
1802                                            size_t count, loff_t *unused)
1803 {
1804         struct seq_file *seq = file->private_data;
1805         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)seq->private);
1806         char kernbuf[128];
1807         bool val;
1808         int rc;
1809
1810         if (count == 0)
1811                 return 0;
1812         if (count >= sizeof(kernbuf))
1813                 return -EINVAL;
1814
1815         if (copy_from_user(kernbuf, buffer, count))
1816                 return -EFAULT;
1817         kernbuf[count] = 0;
1818
1819         buffer += lprocfs_find_named_value(kernbuf, "unstable_check:", &count) -
1820                   kernbuf;
1821         rc = kstrtobool_from_user(buffer, count, &val);
1822         if (rc < 0)
1823                 return rc;
1824
1825         /* borrow lru lock to set the value */
1826         spin_lock(&sbi->ll_cache->ccc_lru_lock);
1827         sbi->ll_cache->ccc_unstable_check = val;
1828         spin_unlock(&sbi->ll_cache->ccc_lru_lock);
1829
1830         return count;
1831 }
1832
1833 LDEBUGFS_SEQ_FOPS(ll_unstable_stats);
1834
1835 static int ll_root_squash_seq_show(struct seq_file *m, void *v)
1836 {
1837         struct super_block *sb = m->private;
1838         struct ll_sb_info *sbi = ll_s2sbi(sb);
1839         struct root_squash_info *squash = &sbi->ll_squash;
1840
1841         seq_printf(m, "%u:%u\n", squash->rsi_uid, squash->rsi_gid);
1842         return 0;
1843 }
1844
1845 static ssize_t ll_root_squash_seq_write(struct file *file,
1846                                         const char __user *buffer,
1847                                         size_t count, loff_t *off)
1848 {
1849         struct seq_file *m = file->private_data;
1850         struct super_block *sb = m->private;
1851         struct ll_sb_info *sbi = ll_s2sbi(sb);
1852         struct root_squash_info *squash = &sbi->ll_squash;
1853
1854         return lprocfs_wr_root_squash(buffer, count, squash, sbi->ll_fsname);
1855 }
1856
1857 LDEBUGFS_SEQ_FOPS(ll_root_squash);
1858
1859 static int ll_nosquash_nids_seq_show(struct seq_file *m, void *v)
1860 {
1861         struct super_block *sb = m->private;
1862         struct ll_sb_info *sbi = ll_s2sbi(sb);
1863         struct root_squash_info *squash = &sbi->ll_squash;
1864         int len;
1865
1866         spin_lock(&squash->rsi_lock);
1867         if (!list_empty(&squash->rsi_nosquash_nids)) {
1868                 len = cfs_print_nidlist(m->buf + m->count, m->size - m->count,
1869                                         &squash->rsi_nosquash_nids);
1870                 m->count += len;
1871                 seq_putc(m, '\n');
1872         } else {
1873                 seq_puts(m, "NONE\n");
1874         }
1875         spin_unlock(&squash->rsi_lock);
1876
1877         return 0;
1878 }
1879
1880 static ssize_t ll_nosquash_nids_seq_write(struct file *file,
1881                                           const char __user *buffer,
1882                                           size_t count, loff_t *off)
1883 {
1884         struct seq_file *m = file->private_data;
1885         struct super_block *sb = m->private;
1886         struct ll_sb_info *sbi = ll_s2sbi(sb);
1887         struct root_squash_info *squash = &sbi->ll_squash;
1888         int rc;
1889
1890         rc = lprocfs_wr_nosquash_nids(buffer, count, squash, sbi->ll_fsname);
1891         if (rc < 0)
1892                 return rc;
1893
1894         ll_compute_rootsquash_state(sbi);
1895
1896         return rc;
1897 }
1898
1899 LDEBUGFS_SEQ_FOPS(ll_nosquash_nids);
1900
1901 #if defined(CONFIG_LL_ENCRYPTION)
1902 static ssize_t enable_filename_encryption_show(struct kobject *kobj,
1903                                                struct attribute *attr,
1904                                                char *buffer)
1905 {
1906         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1907                                               ll_kset.kobj);
1908         struct lustre_sb_info *lsi = sbi->lsi;
1909
1910         return snprintf(buffer, PAGE_SIZE,  "%u\n",
1911                         lsi->lsi_flags & LSI_FILENAME_ENC ? 1 : 0);
1912 }
1913
1914 static ssize_t enable_filename_encryption_store(struct kobject *kobj,
1915                                                 struct attribute *attr,
1916                                                 const char *buffer,
1917                                                 size_t count)
1918 {
1919         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1920                                               ll_kset.kobj);
1921         struct lustre_sb_info *lsi = sbi->lsi;
1922         bool val;
1923         int rc;
1924
1925         rc = kstrtobool(buffer, &val);
1926         if (rc)
1927                 return rc;
1928
1929         if (val) {
1930                 if (!ll_sbi_has_name_encrypt(sbi)) {
1931                         /* server does not support name encryption,
1932                          * so force it to NULL on client
1933                          */
1934                         CDEBUG(D_SEC, "%s: server does not support name encryption\n",
1935                                sbi->ll_fsname);
1936                         lsi->lsi_flags &= ~LSI_FILENAME_ENC;
1937                         return -EOPNOTSUPP;
1938                 }
1939
1940                 lsi->lsi_flags |= LSI_FILENAME_ENC;
1941         } else {
1942                 lsi->lsi_flags &= ~LSI_FILENAME_ENC;
1943         }
1944
1945         return count;
1946 }
1947
1948 LUSTRE_RW_ATTR(enable_filename_encryption);
1949 #endif /* CONFIG_LL_ENCRYPTION */
1950
1951 #if defined(CONFIG_LL_ENCRYPTION) || defined(HAVE_LUSTRE_CRYPTO)
1952 static ssize_t filename_enc_use_old_base64_show(struct kobject *kobj,
1953                                                 struct attribute *attr,
1954                                                 char *buffer)
1955 {
1956         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1957                                               ll_kset.kobj);
1958         struct lustre_sb_info *lsi = sbi->lsi;
1959
1960         return snprintf(buffer, PAGE_SIZE, "%u\n",
1961                         lsi->lsi_flags & LSI_FILENAME_ENC_B64_OLD_CLI ? 1 : 0);
1962 }
1963
1964 static ssize_t filename_enc_use_old_base64_store(struct kobject *kobj,
1965                                                  struct attribute *attr,
1966                                                  const char *buffer,
1967                                                  size_t count)
1968 {
1969         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1970                                               ll_kset.kobj);
1971         struct lustre_sb_info *lsi = sbi->lsi;
1972         bool val;
1973         int rc;
1974
1975         rc = kstrtobool(buffer, &val);
1976         if (rc)
1977                 return rc;
1978
1979         if (val) {
1980                 if (!ll_sbi_has_name_encrypt(sbi)) {
1981                         /* server does not support name encryption,
1982                          * so force it to NULL on client
1983                          */
1984                         CDEBUG(D_SEC,
1985                                "%s: server does not support name encryption\n",
1986                                sbi->ll_fsname);
1987                         lsi->lsi_flags &= ~LSI_FILENAME_ENC_B64_OLD_CLI;
1988                         return -EOPNOTSUPP;
1989                 }
1990
1991                 lsi->lsi_flags |= LSI_FILENAME_ENC_B64_OLD_CLI;
1992         } else {
1993                 lsi->lsi_flags &= ~LSI_FILENAME_ENC_B64_OLD_CLI;
1994         }
1995
1996         return count;
1997 }
1998
1999 LUSTRE_RW_ATTR(filename_enc_use_old_base64);
2000 #endif /* CONFIG_LL_ENCRYPTION || HAVE_LUSTRE_CRYPTO */
2001
2002 static int ll_pcc_seq_show(struct seq_file *m, void *v)
2003 {
2004         struct super_block *sb = m->private;
2005         struct ll_sb_info *sbi = ll_s2sbi(sb);
2006
2007         return pcc_super_dump(&sbi->ll_pcc_super, m);
2008 }
2009
2010 static ssize_t ll_pcc_seq_write(struct file *file, const char __user *buffer,
2011                                 size_t count, loff_t *off)
2012 {
2013         struct seq_file *m = file->private_data;
2014         struct super_block *sb = m->private;
2015         struct ll_sb_info *sbi = ll_s2sbi(sb);
2016         int rc;
2017         char *kernbuf;
2018
2019         if (count >= LPROCFS_WR_PCC_MAX_CMD)
2020                 return -EINVAL;
2021
2022         if (!(exp_connect_flags2(sbi->ll_md_exp) & OBD_CONNECT2_PCC))
2023                 return -EOPNOTSUPP;
2024
2025         OBD_ALLOC(kernbuf, count + 1);
2026         if (kernbuf == NULL)
2027                 return -ENOMEM;
2028
2029         if (copy_from_user(kernbuf, buffer, count))
2030                 GOTO(out_free_kernbuff, rc = -EFAULT);
2031
2032         rc = pcc_cmd_handle(kernbuf, count, &sbi->ll_pcc_super);
2033 out_free_kernbuff:
2034         OBD_FREE(kernbuf, count + 1);
2035         return rc ? rc : count;
2036 }
2037 LDEBUGFS_SEQ_FOPS(ll_pcc);
2038
2039 struct ldebugfs_vars lprocfs_llite_obd_vars[] = {
2040         { .name =       "site",
2041           .fops =       &ll_site_stats_fops                     },
2042         { .name =       "max_cached_mb",
2043           .fops =       &ll_max_cached_mb_fops                  },
2044         { .name =       "statahead_stats",
2045           .fops =       &ll_statahead_stats_fops                },
2046         { .name =       "unstable_stats",
2047           .fops =       &ll_unstable_stats_fops                 },
2048         { .name =       "sbi_flags",
2049           .fops =       &ll_sbi_flags_fops                      },
2050         { .name =       "root_squash",
2051           .fops =       &ll_root_squash_fops                    },
2052         { .name =       "nosquash_nids",
2053           .fops =       &ll_nosquash_nids_fops                  },
2054         { .name =       "pcc",
2055           .fops =       &ll_pcc_fops,                           },
2056         { NULL }
2057 };
2058
2059 #define MAX_STRING_SIZE 128
2060
2061 static struct attribute *llite_attrs[] = {
2062         &lustre_attr_blocksize.attr,
2063         &lustre_attr_stat_blocksize.attr,
2064         &lustre_attr_kbytestotal.attr,
2065         &lustre_attr_kbytesfree.attr,
2066         &lustre_attr_kbytesavail.attr,
2067         &lustre_attr_filestotal.attr,
2068         &lustre_attr_filesfree.attr,
2069         &lustre_attr_client_type.attr,
2070         &lustre_attr_foreign_symlink_enable.attr,
2071         &lustre_attr_foreign_symlink_prefix.attr,
2072         &lustre_attr_foreign_symlink_upcall.attr,
2073         &lustre_attr_foreign_symlink_upcall_info.attr,
2074         &lustre_attr_fstype.attr,
2075         &lustre_attr_uuid.attr,
2076         &lustre_attr_checksums.attr,
2077         &lustre_attr_checksum_pages.attr,
2078         &lustre_attr_max_read_ahead_mb.attr,
2079         &lustre_attr_max_read_ahead_per_file_mb.attr,
2080         &lustre_attr_max_read_ahead_whole_mb.attr,
2081         &lustre_attr_max_read_ahead_async_active.attr,
2082         &lustre_attr_read_ahead_async_file_threshold_mb.attr,
2083         &lustre_attr_read_ahead_range_kb.attr,
2084         &lustre_attr_stats_track_pid.attr,
2085         &lustre_attr_stats_track_ppid.attr,
2086         &lustre_attr_stats_track_gid.attr,
2087         &lustre_attr_enable_statahead_fname.attr,
2088         &lustre_attr_statahead_running_max.attr,
2089         &lustre_attr_statahead_batch_max.attr,
2090         &lustre_attr_statahead_max.attr,
2091         &lustre_attr_statahead_min.attr,
2092         &lustre_attr_statahead_timeout.attr,
2093         &lustre_attr_statahead_agl.attr,
2094         &lustre_attr_lazystatfs.attr,
2095         &lustre_attr_statfs_max_age.attr,
2096         &lustre_attr_statfs_project.attr,
2097         &lustre_attr_max_easize.attr,
2098         &lustre_attr_default_easize.attr,
2099         &lustre_attr_xattr_cache.attr,
2100         &lustre_attr_fast_read.attr,
2101         &lustre_attr_tiny_write.attr,
2102         &lustre_attr_parallel_dio.attr,
2103         &lustre_attr_unaligned_dio.attr,
2104         &lustre_attr_hybrid_io.attr,
2105         &lustre_attr_file_heat.attr,
2106         &lustre_attr_heat_decay_percentage.attr,
2107         &lustre_attr_heat_period_second.attr,
2108         &lustre_attr_opencache_threshold_count.attr,
2109         &lustre_attr_opencache_threshold_ms.attr,
2110         &lustre_attr_opencache_max_ms.attr,
2111         &lustre_attr_inode_cache.attr,
2112 #ifdef CONFIG_LL_ENCRYPTION
2113         &lustre_attr_enable_filename_encryption.attr,
2114 #endif
2115 #if defined(CONFIG_LL_ENCRYPTION) || defined(HAVE_LUSTRE_CRYPTO)
2116         &lustre_attr_filename_enc_use_old_base64.attr,
2117 #endif
2118         NULL,
2119 };
2120
2121 KOBJ_ATTRIBUTE_GROUPS(llite); /* creates llite_groups */
2122
2123 static void sbi_kobj_release(struct kobject *kobj)
2124 {
2125         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
2126                                               ll_kset.kobj);
2127         complete(&sbi->ll_kobj_unregister);
2128 }
2129
2130 static struct kobj_type sbi_ktype = {
2131         .default_groups = KOBJ_ATTR_GROUPS(llite),
2132         .sysfs_ops      = &lustre_sysfs_ops,
2133         .release        = sbi_kobj_release,
2134 };
2135
2136 static const struct llite_file_opcode {
2137         __u32                           lfo_opcode;
2138         enum lprocfs_counter_config     lfo_config;
2139         const char                      *lfo_opname;
2140 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
2141         /* file operation */
2142         { LPROC_LL_READ_BYTES,  LPROCFS_TYPE_BYTES_FULL, "read_bytes" },
2143         { LPROC_LL_WRITE_BYTES, LPROCFS_TYPE_BYTES_FULL, "write_bytes" },
2144         { LPROC_LL_READ,        LPROCFS_TYPE_LATENCY,   "read" },
2145         { LPROC_LL_WRITE,       LPROCFS_TYPE_LATENCY,   "write" },
2146         { LPROC_LL_IOCTL,       LPROCFS_TYPE_REQS,      "ioctl" },
2147         { LPROC_LL_OPEN,        LPROCFS_TYPE_LATENCY,   "open" },
2148         { LPROC_LL_RELEASE,     LPROCFS_TYPE_LATENCY,   "close" },
2149         { LPROC_LL_MMAP,        LPROCFS_TYPE_LATENCY,   "mmap" },
2150         { LPROC_LL_FAULT,       LPROCFS_TYPE_LATENCY,   "page_fault" },
2151         { LPROC_LL_MKWRITE,     LPROCFS_TYPE_LATENCY,   "page_mkwrite" },
2152         { LPROC_LL_LLSEEK,      LPROCFS_TYPE_LATENCY,   "seek" },
2153         { LPROC_LL_FSYNC,       LPROCFS_TYPE_LATENCY,   "fsync" },
2154         { LPROC_LL_READDIR,     LPROCFS_TYPE_LATENCY,   "readdir" },
2155         { LPROC_LL_INODE_OCOUNT, LPROCFS_TYPE_REQS | LPROCFS_CNTR_AVGMINMAX |
2156                                 LPROCFS_CNTR_STDDEV,    "opencount" },
2157         { LPROC_LL_INODE_OPCLTM, LPROCFS_TYPE_LATENCY,  "openclosetime" },
2158         /* inode operation */
2159         { LPROC_LL_SETATTR,     LPROCFS_TYPE_LATENCY,   "setattr" },
2160         { LPROC_LL_TRUNC,       LPROCFS_TYPE_LATENCY,   "truncate" },
2161         { LPROC_LL_FLOCK,       LPROCFS_TYPE_LATENCY,   "flock" },
2162         { LPROC_LL_GETATTR,     LPROCFS_TYPE_LATENCY,   "getattr" },
2163         { LPROC_LL_FALLOCATE,   LPROCFS_TYPE_LATENCY,   "fallocate"},
2164         /* dir inode operation */
2165         { LPROC_LL_CREATE,      LPROCFS_TYPE_LATENCY,   "create" },
2166         { LPROC_LL_LINK,        LPROCFS_TYPE_LATENCY,   "link" },
2167         { LPROC_LL_UNLINK,      LPROCFS_TYPE_LATENCY,   "unlink" },
2168         { LPROC_LL_SYMLINK,     LPROCFS_TYPE_LATENCY,   "symlink" },
2169         { LPROC_LL_MKDIR,       LPROCFS_TYPE_LATENCY,   "mkdir" },
2170         { LPROC_LL_RMDIR,       LPROCFS_TYPE_LATENCY,   "rmdir" },
2171         { LPROC_LL_MKNOD,       LPROCFS_TYPE_LATENCY,   "mknod" },
2172         { LPROC_LL_RENAME,      LPROCFS_TYPE_LATENCY,   "rename" },
2173         /* special inode operation */
2174         { LPROC_LL_STATFS,      LPROCFS_TYPE_LATENCY,   "statfs" },
2175         { LPROC_LL_SETXATTR,    LPROCFS_TYPE_LATENCY,   "setxattr" },
2176         { LPROC_LL_GETXATTR,    LPROCFS_TYPE_LATENCY,   "getxattr" },
2177         { LPROC_LL_GETXATTR_HITS, LPROCFS_TYPE_REQS,    "getxattr_hits" },
2178         { LPROC_LL_LISTXATTR,   LPROCFS_TYPE_LATENCY,   "listxattr" },
2179         { LPROC_LL_REMOVEXATTR, LPROCFS_TYPE_LATENCY,   "removexattr" },
2180         { LPROC_LL_INODE_PERM,  LPROCFS_TYPE_LATENCY,   "inode_permission" },
2181 };
2182
2183 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, long count)
2184 {
2185         if (!sbi->ll_stats)
2186                 return;
2187
2188         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
2189                 lprocfs_counter_add(sbi->ll_stats, op, count);
2190         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
2191                  sbi->ll_stats_track_id == current->pid)
2192                 lprocfs_counter_add(sbi->ll_stats, op, count);
2193         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
2194                  sbi->ll_stats_track_id == current->real_parent->pid)
2195                 lprocfs_counter_add(sbi->ll_stats, op, count);
2196         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
2197                  sbi->ll_stats_track_id ==
2198                         from_kgid(&init_user_ns, current_gid()))
2199                 lprocfs_counter_add(sbi->ll_stats, op, count);
2200 }
2201 EXPORT_SYMBOL(ll_stats_ops_tally);
2202
2203 static const char *const ra_stat_string[] = {
2204         [RA_STAT_HIT]                   = "hits",
2205         [RA_STAT_MISS]                  = "misses",
2206         [RA_STAT_DISTANT_READPAGE]      = "readpage_not_consecutive",
2207         [RA_STAT_MISS_IN_WINDOW]        = "miss_inside_window",
2208         [RA_STAT_FAILED_GRAB_PAGE]      = "failed_grab_cache_page",
2209         [RA_STAT_FAILED_MATCH]          = "failed_lock_match",
2210         [RA_STAT_DISCARDED]             = "read_but_discarded",
2211         [RA_STAT_ZERO_LEN]              = "zero_length_file",
2212         [RA_STAT_ZERO_WINDOW]           = "zero_size_window",
2213         [RA_STAT_EOF]                   = "readahead_to_eof",
2214         [RA_STAT_MAX_IN_FLIGHT]         = "hit_max_readahead_issue",
2215         [RA_STAT_WRONG_GRAB_PAGE]       = "wrong_page_from_grab_cache_page",
2216         [RA_STAT_FAILED_REACH_END]      = "failed_to_reach_end",
2217         [RA_STAT_ASYNC]                 = "async_readahead",
2218         [RA_STAT_FAILED_FAST_READ]      = "failed_to_fast_read",
2219         [RA_STAT_MMAP_RANGE_READ]       = "mmap_range_read",
2220         [RA_STAT_READAHEAD_PAGES]       = "readahead_pages"
2221 };
2222
2223 int ll_debugfs_register_super(struct super_block *sb, const char *name)
2224 {
2225         struct lustre_sb_info *lsi = s2lsi(sb);
2226         struct ll_sb_info *sbi = ll_s2sbi(sb);
2227         int err, id;
2228
2229         ENTRY;
2230         LASSERT(sbi);
2231
2232         if (IS_ERR_OR_NULL(llite_root))
2233                 goto out_ll_kset;
2234
2235         sbi->ll_debugfs_entry = debugfs_create_dir(name, llite_root);
2236         ldebugfs_add_vars(sbi->ll_debugfs_entry, lprocfs_llite_obd_vars, sb);
2237
2238         debugfs_create_file("dump_page_cache", 0444, sbi->ll_debugfs_entry, sbi,
2239                             &vvp_dump_pgcache_file_ops);
2240
2241         debugfs_create_file("extents_stats", 0644, sbi->ll_debugfs_entry, sbi,
2242                                  &ll_rw_extents_stats_fops);
2243
2244         debugfs_create_file("extents_stats_per_process", 0644,
2245                             sbi->ll_debugfs_entry, sbi,
2246                             &ll_rw_extents_stats_pp_fops);
2247
2248         debugfs_create_file("offset_stats", 0644, sbi->ll_debugfs_entry, sbi,
2249                             &ll_rw_offset_stats_fops);
2250
2251         /* File operations stats */
2252         sbi->ll_stats = lprocfs_stats_alloc(LPROC_LL_FILE_OPCODES,
2253                                             LPROCFS_STATS_FLAG_NONE);
2254         if (sbi->ll_stats == NULL)
2255                 GOTO(out_debugfs, err = -ENOMEM);
2256
2257         /* do counter init */
2258         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++)
2259                 lprocfs_counter_init(sbi->ll_stats,
2260                                      llite_opcode_table[id].lfo_opcode,
2261                                      llite_opcode_table[id].lfo_config,
2262                                      llite_opcode_table[id].lfo_opname);
2263
2264         debugfs_create_file("stats", 0644, sbi->ll_debugfs_entry,
2265                             sbi->ll_stats, &ldebugfs_stats_seq_fops);
2266
2267         sbi->ll_ra_stats = lprocfs_stats_alloc(ARRAY_SIZE(ra_stat_string),
2268                                                LPROCFS_STATS_FLAG_NONE);
2269         if (sbi->ll_ra_stats == NULL)
2270                 GOTO(out_stats, err = -ENOMEM);
2271
2272         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++) {
2273                 if (id == RA_STAT_READAHEAD_PAGES)
2274                         lprocfs_counter_init(sbi->ll_ra_stats, id,
2275                                              LPROCFS_TYPE_PAGES |
2276                                              LPROCFS_CNTR_AVGMINMAX,
2277                                              ra_stat_string[id]);
2278                 else
2279                         lprocfs_counter_init(sbi->ll_ra_stats, id,
2280                                              LPROCFS_TYPE_PAGES,
2281                                              ra_stat_string[id]);
2282         }
2283
2284         debugfs_create_file("read_ahead_stats", 0644, sbi->ll_debugfs_entry,
2285                             sbi->ll_ra_stats, &ldebugfs_stats_seq_fops);
2286
2287 out_ll_kset:
2288         /* Yes we also register sysfs mount kset here as well */
2289         sbi->ll_kset.kobj.parent = llite_kobj;
2290         sbi->ll_kset.kobj.ktype = &sbi_ktype;
2291         init_completion(&sbi->ll_kobj_unregister);
2292         err = kobject_set_name(&sbi->ll_kset.kobj, "%s", name);
2293         if (err)
2294                 GOTO(out_ra_stats, err);
2295
2296         err = kset_register(&sbi->ll_kset);
2297         if (err)
2298                 GOTO(out_ra_stats, err);
2299
2300         lsi->lsi_kobj = kobject_get(&sbi->ll_kset.kobj);
2301
2302         RETURN(0);
2303 out_ra_stats:
2304         lprocfs_stats_free(&sbi->ll_ra_stats);
2305 out_stats:
2306         lprocfs_stats_free(&sbi->ll_stats);
2307 out_debugfs:
2308         debugfs_remove_recursive(sbi->ll_debugfs_entry);
2309
2310         RETURN(err);
2311 }
2312
2313 void ll_debugfs_unregister_super(struct super_block *sb)
2314 {
2315         struct lustre_sb_info *lsi = s2lsi(sb);
2316         struct ll_sb_info *sbi = ll_s2sbi(sb);
2317
2318         debugfs_remove_recursive(sbi->ll_debugfs_entry);
2319
2320         if (sbi->ll_dt_obd)
2321                 sysfs_remove_link(&sbi->ll_kset.kobj,
2322                                   sbi->ll_dt_obd->obd_type->typ_name);
2323
2324         if (sbi->ll_md_obd)
2325                 sysfs_remove_link(&sbi->ll_kset.kobj,
2326                                   sbi->ll_md_obd->obd_type->typ_name);
2327
2328         kobject_put(lsi->lsi_kobj);
2329
2330         kset_unregister(&sbi->ll_kset);
2331         wait_for_completion(&sbi->ll_kobj_unregister);
2332
2333         lprocfs_stats_free(&sbi->ll_ra_stats);
2334         lprocfs_stats_free(&sbi->ll_stats);
2335 }
2336 #undef MAX_STRING_SIZE
2337
2338 static void ll_display_extents_info(struct ll_rw_extents_info *rw_extents,
2339                                     struct seq_file *seq, int which)
2340 {
2341         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
2342         unsigned long start, end, r, w;
2343         char *unitp = "KMGTPEZY";
2344         int i, units = 10;
2345         struct per_process_info *pp_info;
2346
2347         pp_info = &rw_extents->pp_extents[which];
2348         read_cum = 0;
2349         write_cum = 0;
2350         start = 0;
2351
2352         for (i = 0; i < LL_HIST_MAX; i++) {
2353                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
2354                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
2355         }
2356
2357         for (i = 0; i < LL_HIST_MAX; i++) {
2358                 r = pp_info->pp_r_hist.oh_buckets[i];
2359                 w = pp_info->pp_w_hist.oh_buckets[i];
2360                 read_cum += r;
2361                 write_cum += w;
2362                 end = 1 << (i + LL_HIST_START - units);
2363                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4u %4u  | "
2364                            "%14lu %4u %4u\n", start, *unitp, end, *unitp,
2365                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
2366                            r, pct(r, read_tot), pct(read_cum, read_tot),
2367                            w, pct(w, write_tot), pct(write_cum, write_tot));
2368                 start = end;
2369                 if (start == (1 << 10)) {
2370                         start = 1;
2371                         units += 10;
2372                         unitp++;
2373                 }
2374                 if (read_cum == read_tot && write_cum == write_tot)
2375                         break;
2376         }
2377 }
2378
2379 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
2380 {
2381         struct ll_sb_info *sbi = seq->private;
2382         struct ll_rw_extents_info *rw_extents = sbi->ll_rw_extents_info;
2383         int k;
2384
2385         if (!sbi->ll_rw_stats_on || !rw_extents) {
2386                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
2387                 return 0;
2388         }
2389
2390         spin_lock(&sbi->ll_pp_extent_lock);
2391         lprocfs_stats_header(seq, ktime_get_real(), rw_extents->pp_init, 25,
2392                              ":", true, "");
2393         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
2394         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
2395                    "extents", "calls", "%", "cum%", "calls", "%", "cum%");
2396
2397         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
2398                 if (rw_extents->pp_extents[k].pid != 0) {
2399                         seq_printf(seq, "\nPID: %d\n",
2400                                    rw_extents->pp_extents[k].pid);
2401                         ll_display_extents_info(rw_extents, seq, k);
2402                 }
2403         }
2404         spin_unlock(&sbi->ll_pp_extent_lock);
2405         return 0;
2406 }
2407
2408 static int alloc_rw_stats_info(struct ll_sb_info *sbi)
2409 {
2410         struct ll_rw_extents_info *rw_extents;
2411         struct ll_rw_process_info *offset;
2412         struct ll_rw_process_info *process;
2413         int i, rc = 0;
2414
2415         OBD_ALLOC(rw_extents, sizeof(*rw_extents));
2416         if (!rw_extents)
2417                 return -ENOMEM;
2418
2419         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
2420                 spin_lock_init(&rw_extents->pp_extents[i].pp_r_hist.oh_lock);
2421                 spin_lock_init(&rw_extents->pp_extents[i].pp_w_hist.oh_lock);
2422         }
2423         rw_extents->pp_init = ktime_get_real();
2424
2425         spin_lock(&sbi->ll_pp_extent_lock);
2426         if (!sbi->ll_rw_extents_info)
2427                 sbi->ll_rw_extents_info = rw_extents;
2428         spin_unlock(&sbi->ll_pp_extent_lock);
2429         /* another writer allocated the struct before we got the lock */
2430         if (sbi->ll_rw_extents_info != rw_extents)
2431                 OBD_FREE(rw_extents, sizeof(*rw_extents));
2432
2433         OBD_ALLOC(process, sizeof(*process) * LL_PROCESS_HIST_MAX);
2434         if (!process)
2435                 GOTO(out, rc = -ENOMEM);
2436         OBD_ALLOC(offset, sizeof(*offset) * LL_OFFSET_HIST_MAX);
2437         if (!offset)
2438                 GOTO(out_free, rc = -ENOMEM);
2439
2440         spin_lock(&sbi->ll_process_lock);
2441         if (!sbi->ll_rw_process_info)
2442                 sbi->ll_rw_process_info = process;
2443         if (!sbi->ll_rw_offset_info)
2444                 sbi->ll_rw_offset_info = offset;
2445         spin_unlock(&sbi->ll_process_lock);
2446         sbi->ll_process_stats_init = ktime_get_real();
2447
2448         /* another writer allocated the structs before we got the lock */
2449         if (sbi->ll_rw_offset_info != offset)
2450                 OBD_FREE(offset, sizeof(*offset) * LL_OFFSET_HIST_MAX);
2451         if (sbi->ll_rw_process_info != process) {
2452 out_free:
2453                 OBD_FREE(process, sizeof(*process) * LL_PROCESS_HIST_MAX);
2454         }
2455
2456 out:
2457         return rc;
2458 }
2459
2460 void ll_free_rw_stats_info(struct ll_sb_info *sbi)
2461 {
2462         if (sbi->ll_rw_extents_info) {
2463                 OBD_FREE(sbi->ll_rw_extents_info,
2464                          sizeof(*sbi->ll_rw_extents_info));
2465                 sbi->ll_rw_extents_info = NULL;
2466         }
2467         if (sbi->ll_rw_offset_info) {
2468                 OBD_FREE(sbi->ll_rw_offset_info,
2469                          sizeof(*sbi->ll_rw_offset_info) * LL_OFFSET_HIST_MAX);
2470                 sbi->ll_rw_offset_info = NULL;
2471         }
2472         if (sbi->ll_rw_process_info) {
2473                 OBD_FREE(sbi->ll_rw_process_info,
2474                         sizeof(*sbi->ll_rw_process_info) * LL_PROCESS_HIST_MAX);
2475                 sbi->ll_rw_process_info = NULL;
2476         }
2477 }
2478
2479 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
2480                                                 const char __user *buf,
2481                                                 size_t len, loff_t *off)
2482 {
2483         struct seq_file *seq = file->private_data;
2484         struct ll_sb_info *sbi = seq->private;
2485         struct ll_rw_extents_info *rw_extents;
2486         int i;
2487         __s64 value;
2488
2489         if (len == 0)
2490                 return -EINVAL;
2491
2492         value = ll_stats_pid_write(buf, len);
2493
2494         if (value == 0) {
2495                 sbi->ll_rw_stats_on = 0;
2496         } else {
2497                 if (!sbi->ll_rw_extents_info) {
2498                         int rc = alloc_rw_stats_info(sbi);
2499
2500                         if (rc)
2501                                 return rc;
2502                 }
2503                 sbi->ll_rw_stats_on = 1;
2504         }
2505
2506
2507         spin_lock(&sbi->ll_pp_extent_lock);
2508         rw_extents = sbi->ll_rw_extents_info;
2509         if (rw_extents) {
2510                 rw_extents->pp_init = ktime_get_real();
2511                 for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
2512                         rw_extents->pp_extents[i].pid = 0;
2513                         lprocfs_oh_clear(&rw_extents->pp_extents[i].pp_r_hist);
2514                         lprocfs_oh_clear(&rw_extents->pp_extents[i].pp_w_hist);
2515                 }
2516         }
2517         spin_unlock(&sbi->ll_pp_extent_lock);
2518
2519         return len;
2520 }
2521
2522 LDEBUGFS_SEQ_FOPS(ll_rw_extents_stats_pp);
2523
2524 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
2525 {
2526         struct ll_sb_info *sbi = seq->private;
2527         struct ll_rw_extents_info *rw_extents = sbi->ll_rw_extents_info;
2528
2529         if (!sbi->ll_rw_stats_on || !rw_extents) {
2530                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
2531                 return 0;
2532         }
2533
2534         spin_lock(&sbi->ll_lock);
2535         lprocfs_stats_header(seq, ktime_get_real(), rw_extents->pp_init, 25,
2536                              ":", true, "");
2537
2538         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
2539         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
2540                    "extents", "calls", "%", "cum%",
2541                    "calls", "%", "cum%");
2542
2543         ll_display_extents_info(rw_extents, seq, LL_PROCESS_HIST_MAX);
2544         spin_unlock(&sbi->ll_lock);
2545
2546         return 0;
2547 }
2548
2549 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
2550                                              const char __user *buf,
2551                                              size_t len, loff_t *off)
2552 {
2553         struct seq_file *seq = file->private_data;
2554         struct ll_sb_info *sbi = seq->private;
2555         struct ll_rw_extents_info *rw_extents;
2556         int i;
2557         __s64 value;
2558
2559         if (len == 0)
2560                 return -EINVAL;
2561
2562         value = ll_stats_pid_write(buf, len);
2563
2564         if (value == 0) {
2565                 sbi->ll_rw_stats_on = 0;
2566         } else {
2567                 if (!sbi->ll_rw_extents_info) {
2568                         int rc = alloc_rw_stats_info(sbi);
2569
2570                         if (rc)
2571                                 return rc;
2572                 }
2573                 sbi->ll_rw_stats_on = 1;
2574         }
2575
2576         spin_lock(&sbi->ll_pp_extent_lock);
2577         rw_extents = sbi->ll_rw_extents_info;
2578         if (rw_extents) {
2579                 rw_extents->pp_init = ktime_get_real();
2580                 for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
2581                         rw_extents->pp_extents[i].pid = 0;
2582                         lprocfs_oh_clear(&rw_extents->pp_extents[i].pp_r_hist);
2583                         lprocfs_oh_clear(&rw_extents->pp_extents[i].pp_w_hist);
2584                 }
2585         }
2586         spin_unlock(&sbi->ll_pp_extent_lock);
2587
2588         return len;
2589 }
2590
2591 LDEBUGFS_SEQ_FOPS(ll_rw_extents_stats);
2592
2593 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
2594                        struct ll_file_data *file, loff_t pos,
2595                        size_t count, int rw)
2596 {
2597         int i, cur = -1;
2598         struct ll_rw_process_info *process;
2599         struct ll_rw_process_info *offset;
2600         int *off_count = &sbi->ll_rw_offset_entry_count;
2601         int *process_count = &sbi->ll_offset_process_count;
2602         struct ll_rw_extents_info *rw_extents;
2603
2604         if (!sbi->ll_rw_stats_on)
2605                 return;
2606
2607         spin_lock(&sbi->ll_pp_extent_lock);
2608         rw_extents = sbi->ll_rw_extents_info;
2609         if (!rw_extents) {
2610                 spin_unlock(&sbi->ll_pp_extent_lock);
2611                 return;
2612         }
2613
2614         /* Extent statistics */
2615         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
2616                 if (rw_extents->pp_extents[i].pid == pid) {
2617                         cur = i;
2618                         break;
2619                 }
2620         }
2621
2622         if (cur == -1) {
2623                 /* new process */
2624                 sbi->ll_extent_process_count =
2625                         (sbi->ll_extent_process_count + 1) %
2626                          LL_PROCESS_HIST_MAX;
2627                 cur = sbi->ll_extent_process_count;
2628                 rw_extents->pp_extents[cur].pid = pid;
2629                 lprocfs_oh_clear(&rw_extents->pp_extents[cur].pp_r_hist);
2630                 lprocfs_oh_clear(&rw_extents->pp_extents[cur].pp_w_hist);
2631         }
2632
2633         for (i = 0; (count >= 1 << (LL_HIST_START + i)) &&
2634              (i < (LL_HIST_MAX - 1)); i++);
2635         if (rw == 0) {
2636                 rw_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
2637                 rw_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
2638         } else {
2639                 rw_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
2640                 rw_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
2641         }
2642         spin_unlock(&sbi->ll_pp_extent_lock);
2643
2644         spin_lock(&sbi->ll_process_lock);
2645         process = sbi->ll_rw_process_info;
2646         offset = sbi->ll_rw_offset_info;
2647         if (!process || !offset)
2648                 goto out_unlock;
2649
2650         /* Offset statistics */
2651         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
2652                 if (process[i].rw_pid == pid) {
2653                         if (process[i].rw_last_file != file) {
2654                                 process[i].rw_range_start = pos;
2655                                 process[i].rw_last_file_pos = pos + count;
2656                                 process[i].rw_smallest_extent = count;
2657                                 process[i].rw_largest_extent = count;
2658                                 process[i].rw_offset = 0;
2659                                 process[i].rw_last_file = file;
2660                                 goto out_unlock;
2661                         }
2662                         if (process[i].rw_last_file_pos != pos) {
2663                                 *off_count =
2664                                         (*off_count + 1) % LL_OFFSET_HIST_MAX;
2665                                 offset[*off_count].rw_op = process[i].rw_op;
2666                                 offset[*off_count].rw_pid = pid;
2667                                 offset[*off_count].rw_range_start =
2668                                         process[i].rw_range_start;
2669                                 offset[*off_count].rw_range_end =
2670                                         process[i].rw_last_file_pos;
2671                                 offset[*off_count].rw_smallest_extent =
2672                                         process[i].rw_smallest_extent;
2673                                 offset[*off_count].rw_largest_extent =
2674                                         process[i].rw_largest_extent;
2675                                 offset[*off_count].rw_offset =
2676                                         process[i].rw_offset;
2677                                 process[i].rw_op = rw;
2678                                 process[i].rw_range_start = pos;
2679                                 process[i].rw_smallest_extent = count;
2680                                 process[i].rw_largest_extent = count;
2681                                 process[i].rw_offset = pos -
2682                                         process[i].rw_last_file_pos;
2683                         }
2684                         if (process[i].rw_smallest_extent > count)
2685                                 process[i].rw_smallest_extent = count;
2686                         if (process[i].rw_largest_extent < count)
2687                                 process[i].rw_largest_extent = count;
2688                         process[i].rw_last_file_pos = pos + count;
2689                         goto out_unlock;
2690                 }
2691         }
2692         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
2693         process[*process_count].rw_pid = pid;
2694         process[*process_count].rw_op = rw;
2695         process[*process_count].rw_range_start = pos;
2696         process[*process_count].rw_last_file_pos = pos + count;
2697         process[*process_count].rw_smallest_extent = count;
2698         process[*process_count].rw_largest_extent = count;
2699         process[*process_count].rw_offset = 0;
2700         process[*process_count].rw_last_file = file;
2701
2702 out_unlock:
2703         spin_unlock(&sbi->ll_process_lock);
2704 }
2705
2706 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
2707 {
2708         struct ll_sb_info *sbi = seq->private;
2709         struct ll_rw_process_info *offset;
2710         struct ll_rw_process_info *process;
2711         int i;
2712
2713         if (!sbi->ll_rw_stats_on) {
2714                 seq_puts(seq,
2715                          "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
2716                 return 0;
2717         }
2718
2719         spin_lock(&sbi->ll_process_lock);
2720         lprocfs_stats_header(seq, ktime_get_real(), sbi->ll_process_stats_init,
2721                              25, ":", true, "");
2722         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
2723                    "R/W", "PID", "RANGE START", "RANGE END",
2724                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
2725
2726         /* We stored the discontiguous offsets here; print them first */
2727         offset = sbi->ll_rw_offset_info;
2728         for (i = 0; offset && i < LL_OFFSET_HIST_MAX; i++) {
2729                 if (offset[i].rw_pid != 0)
2730                         seq_printf(seq,
2731                                   "%3c %10d %14llu %14llu %17lu %17lu %14lld\n",
2732                                    offset[i].rw_op == READ ? 'R' : 'W',
2733                                    offset[i].rw_pid,
2734                                    offset[i].rw_range_start,
2735                                    offset[i].rw_range_end,
2736                                    (unsigned long)offset[i].rw_smallest_extent,
2737                                    (unsigned long)offset[i].rw_largest_extent,
2738                                    offset[i].rw_offset);
2739         }
2740
2741         /* Then print the current offsets for each process */
2742         process = sbi->ll_rw_process_info;
2743         for (i = 0; process && i < LL_PROCESS_HIST_MAX; i++) {
2744                 if (process[i].rw_pid != 0)
2745                         seq_printf(seq,
2746                                   "%3c %10d %14llu %14llu %17lu %17lu %14lld\n",
2747                                    process[i].rw_op == READ ? 'R' : 'W',
2748                                    process[i].rw_pid,
2749                                    process[i].rw_range_start,
2750                                    process[i].rw_last_file_pos,
2751                                    (unsigned long)process[i].rw_smallest_extent,
2752                                    (unsigned long)process[i].rw_largest_extent,
2753                                    process[i].rw_offset);
2754         }
2755         spin_unlock(&sbi->ll_process_lock);
2756
2757         return 0;
2758 }
2759
2760 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
2761                                             const char __user *buf,
2762                                             size_t len, loff_t *off)
2763 {
2764         struct seq_file *seq = file->private_data;
2765         struct ll_sb_info *sbi = seq->private;
2766         __s64 value;
2767
2768         if (len == 0)
2769                 return -EINVAL;
2770
2771         value = ll_stats_pid_write(buf, len);
2772
2773         if (value == 0) {
2774                 sbi->ll_rw_stats_on = 0;
2775         } else {
2776                 if (!sbi->ll_rw_process_info || !sbi->ll_rw_offset_info) {
2777                         int rc = alloc_rw_stats_info(sbi);
2778
2779                         if (rc)
2780                                 return rc;
2781                 }
2782                 sbi->ll_rw_stats_on = 1;
2783         }
2784
2785         spin_lock(&sbi->ll_process_lock);
2786         sbi->ll_offset_process_count = 0;
2787         sbi->ll_rw_offset_entry_count = 0;
2788         sbi->ll_process_stats_init = ktime_get_real();
2789         if (sbi->ll_rw_process_info)
2790                 memset(sbi->ll_rw_process_info, 0,
2791                        sizeof(struct ll_rw_process_info) * LL_PROCESS_HIST_MAX);
2792         if (sbi->ll_rw_offset_info)
2793                 memset(sbi->ll_rw_offset_info, 0,
2794                        sizeof(struct ll_rw_process_info) * LL_OFFSET_HIST_MAX);
2795         spin_unlock(&sbi->ll_process_lock);
2796
2797         return len;
2798 }
2799
2800 LDEBUGFS_SEQ_FOPS(ll_rw_offset_stats);