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 intent_mkdir_show(struct kobject *kobj,
1243                                  struct attribute *attr, char *buf)
1244 {
1245         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1246                                               ll_kset.kobj);
1247
1248         return scnprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_intent_mkdir_enabled);
1249 }
1250
1251 static ssize_t intent_mkdir_store(struct kobject *kobj, struct attribute *attr,
1252                                   const char *buffer, size_t count)
1253 {
1254         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1255                                               ll_kset.kobj);
1256         bool val;
1257         int rc;
1258
1259         rc = kstrtobool(buffer, &val);
1260         if (rc)
1261                 return rc;
1262
1263         sbi->ll_intent_mkdir_enabled = val;
1264
1265         return count;
1266 }
1267 LUSTRE_RW_ATTR(intent_mkdir);
1268
1269 static ssize_t tiny_write_show(struct kobject *kobj,
1270                                struct attribute *attr,
1271                                char *buf)
1272 {
1273         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1274                                               ll_kset.kobj);
1275
1276         return scnprintf(buf, PAGE_SIZE, "%u\n",
1277                          test_bit(LL_SBI_TINY_WRITE, sbi->ll_flags));
1278 }
1279
1280 static ssize_t tiny_write_store(struct kobject *kobj,
1281                                 struct attribute *attr,
1282                                 const char *buffer,
1283                                 size_t count)
1284 {
1285         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1286                                               ll_kset.kobj);
1287         bool val;
1288         int rc;
1289
1290         rc = kstrtobool(buffer, &val);
1291         if (rc)
1292                 return rc;
1293
1294         spin_lock(&sbi->ll_lock);
1295         if (val)
1296                 set_bit(LL_SBI_TINY_WRITE, sbi->ll_flags);
1297         else
1298                 clear_bit(LL_SBI_TINY_WRITE, sbi->ll_flags);
1299         spin_unlock(&sbi->ll_lock);
1300
1301         return count;
1302 }
1303 LUSTRE_RW_ATTR(tiny_write);
1304
1305 static ssize_t unaligned_dio_show(struct kobject *kobj,
1306                                   struct attribute *attr,
1307                                   char *buf)
1308 {
1309         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1310                                               ll_kset.kobj);
1311
1312         return scnprintf(buf, PAGE_SIZE, "%u\n",
1313                          test_bit(LL_SBI_UNALIGNED_DIO, sbi->ll_flags));
1314 }
1315
1316 static ssize_t unaligned_dio_store(struct kobject *kobj,
1317                                    struct attribute *attr,
1318                                    const char *buffer,
1319                                    size_t count)
1320 {
1321         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1322                                               ll_kset.kobj);
1323         bool val;
1324         int rc;
1325
1326         rc = kstrtobool(buffer, &val);
1327         if (rc)
1328                 return rc;
1329
1330         spin_lock(&sbi->ll_lock);
1331         if (val)
1332                 set_bit(LL_SBI_UNALIGNED_DIO, sbi->ll_flags);
1333         else
1334                 clear_bit(LL_SBI_UNALIGNED_DIO, sbi->ll_flags);
1335         spin_unlock(&sbi->ll_lock);
1336
1337         return count;
1338 }
1339 LUSTRE_RW_ATTR(unaligned_dio);
1340
1341 static ssize_t parallel_dio_show(struct kobject *kobj,
1342                                  struct attribute *attr,
1343                                  char *buf)
1344 {
1345         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1346                                               ll_kset.kobj);
1347
1348         return snprintf(buf, PAGE_SIZE, "%u\n",
1349                         test_bit(LL_SBI_PARALLEL_DIO, sbi->ll_flags));
1350 }
1351
1352 static ssize_t parallel_dio_store(struct kobject *kobj,
1353                                   struct attribute *attr,
1354                                   const char *buffer,
1355                                   size_t count)
1356 {
1357         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1358                                               ll_kset.kobj);
1359         bool val;
1360         int rc;
1361
1362         rc = kstrtobool(buffer, &val);
1363         if (rc)
1364                 return rc;
1365
1366         spin_lock(&sbi->ll_lock);
1367         if (val)
1368                 set_bit(LL_SBI_PARALLEL_DIO, sbi->ll_flags);
1369         else
1370                 clear_bit(LL_SBI_PARALLEL_DIO, sbi->ll_flags);
1371         spin_unlock(&sbi->ll_lock);
1372
1373         return count;
1374 }
1375 LUSTRE_RW_ATTR(parallel_dio);
1376
1377 static ssize_t hybrid_io_show(struct kobject *kobj, struct attribute *attr,
1378                               char *buf)
1379 {
1380         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1381                                               ll_kset.kobj);
1382
1383         return snprintf(buf, PAGE_SIZE, "%u\n",
1384                         test_bit(LL_SBI_HYBRID_IO, sbi->ll_flags));
1385 }
1386
1387 static ssize_t hybrid_io_store(struct kobject *kobj, struct attribute *attr,
1388                                const char *buffer, size_t count)
1389 {
1390         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1391                                               ll_kset.kobj);
1392         bool val;
1393         int rc;
1394
1395         rc = kstrtobool(buffer, &val);
1396         if (rc)
1397                 return rc;
1398
1399         spin_lock(&sbi->ll_lock);
1400         if (val)
1401                 set_bit(LL_SBI_HYBRID_IO, sbi->ll_flags);
1402         else
1403                 clear_bit(LL_SBI_HYBRID_IO, sbi->ll_flags);
1404         spin_unlock(&sbi->ll_lock);
1405
1406         return count;
1407 }
1408 LUSTRE_RW_ATTR(hybrid_io);
1409
1410 static ssize_t max_read_ahead_async_active_show(struct kobject *kobj,
1411                                                struct attribute *attr,
1412                                                char *buf)
1413 {
1414         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1415                                               ll_kset.kobj);
1416
1417         return scnprintf(buf, PAGE_SIZE, "%u\n",
1418                          sbi->ll_ra_info.ra_async_max_active);
1419 }
1420
1421 static ssize_t max_read_ahead_async_active_store(struct kobject *kobj,
1422                                                  struct attribute *attr,
1423                                                  const char *buffer,
1424                                                  size_t count)
1425 {
1426         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1427                                               ll_kset.kobj);
1428         unsigned int val;
1429         int rc;
1430
1431         rc = kstrtouint(buffer, 10, &val);
1432         if (rc)
1433                 return rc;
1434
1435         /**
1436          * It doesn't make any sense to make it exceed what
1437          * workqueue could acutally support. This can easily
1438          * over subscripe the cores but Lustre internally
1439          * throttles to avoid those impacts.
1440          */
1441         if (val > WQ_UNBOUND_MAX_ACTIVE) {
1442                 CERROR("%s: cannot set max_read_ahead_async_active=%u larger than %u\n",
1443                        sbi->ll_fsname, val, WQ_UNBOUND_MAX_ACTIVE);
1444                 return -ERANGE;
1445         }
1446
1447         spin_lock(&sbi->ll_lock);
1448         sbi->ll_ra_info.ra_async_max_active = val;
1449         spin_unlock(&sbi->ll_lock);
1450
1451         return count;
1452 }
1453 LUSTRE_RW_ATTR(max_read_ahead_async_active);
1454
1455 static ssize_t read_ahead_async_file_threshold_mb_show(struct kobject *kobj,
1456                                                        struct attribute *attr,
1457                                                        char *buf)
1458 {
1459         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1460                                               ll_kset.kobj);
1461
1462         return scnprintf(buf, PAGE_SIZE, "%lu\n", PAGES_TO_MiB(
1463                          sbi->ll_ra_info.ra_async_pages_per_file_threshold));
1464 }
1465
1466 static ssize_t
1467 read_ahead_async_file_threshold_mb_store(struct kobject *kobj,
1468                                          struct attribute *attr,
1469                                          const char *buffer, size_t count)
1470 {
1471         unsigned long pages_number;
1472         unsigned long max_ra_per_file;
1473         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1474                                               ll_kset.kobj);
1475         int rc;
1476
1477         rc = kstrtoul(buffer, 10, &pages_number);
1478         if (rc)
1479                 return rc;
1480
1481         pages_number = MiB_TO_PAGES(pages_number);
1482         max_ra_per_file = sbi->ll_ra_info.ra_max_pages_per_file;
1483         if (pages_number < 0 || pages_number > max_ra_per_file) {
1484                 CERROR("%s: can't set read_ahead_async_file_threshold_mb=%lu > "
1485                        "max_read_readahead_per_file_mb=%lu\n", sbi->ll_fsname,
1486                        PAGES_TO_MiB(pages_number),
1487                        PAGES_TO_MiB(max_ra_per_file));
1488                 return -ERANGE;
1489         }
1490         sbi->ll_ra_info.ra_async_pages_per_file_threshold = pages_number;
1491
1492         return count;
1493 }
1494 LUSTRE_RW_ATTR(read_ahead_async_file_threshold_mb);
1495
1496 static ssize_t read_ahead_range_kb_show(struct kobject *kobj,
1497                                         struct attribute *attr, char *buf)
1498 {
1499         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1500                                               ll_kset.kobj);
1501
1502         return snprintf(buf, PAGE_SIZE, "%lu\n",
1503                         sbi->ll_ra_info.ra_range_pages << (PAGE_SHIFT - 10));
1504 }
1505
1506 static ssize_t
1507 read_ahead_range_kb_store(struct kobject *kobj,
1508                                struct attribute *attr,
1509                                const char *buffer, size_t count)
1510 {
1511         unsigned long pages_number;
1512         unsigned long max_ra_per_file;
1513         u64 val;
1514         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1515                                               ll_kset.kobj);
1516         int rc;
1517
1518         rc = sysfs_memparse(buffer, count, &val, "KiB");
1519         if (rc < 0)
1520                 return rc;
1521
1522         pages_number = val >> PAGE_SHIFT;
1523         /* Disable mmap range read */
1524         if (pages_number == 0)
1525                 goto out;
1526
1527         max_ra_per_file = sbi->ll_ra_info.ra_max_pages_per_file;
1528         if (pages_number > max_ra_per_file ||
1529             pages_number < RA_MIN_MMAP_RANGE_PAGES)
1530                 return -ERANGE;
1531
1532 out:
1533         spin_lock(&sbi->ll_lock);
1534         sbi->ll_ra_info.ra_range_pages = pages_number;
1535         spin_unlock(&sbi->ll_lock);
1536
1537         return count;
1538 }
1539 LUSTRE_RW_ATTR(read_ahead_range_kb);
1540
1541 static ssize_t fast_read_show(struct kobject *kobj,
1542                               struct attribute *attr,
1543                               char *buf)
1544 {
1545         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1546                                               ll_kset.kobj);
1547
1548         return scnprintf(buf, PAGE_SIZE, "%u\n",
1549                          test_bit(LL_SBI_FAST_READ, sbi->ll_flags));
1550 }
1551
1552 static ssize_t fast_read_store(struct kobject *kobj,
1553                                struct attribute *attr,
1554                                const char *buffer,
1555                                size_t count)
1556 {
1557         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1558                                               ll_kset.kobj);
1559         bool val;
1560         int rc;
1561
1562         rc = kstrtobool(buffer, &val);
1563         if (rc)
1564                 return rc;
1565
1566         spin_lock(&sbi->ll_lock);
1567         if (val)
1568                 set_bit(LL_SBI_FAST_READ, sbi->ll_flags);
1569         else
1570                 clear_bit(LL_SBI_FAST_READ, sbi->ll_flags);
1571         spin_unlock(&sbi->ll_lock);
1572
1573         return count;
1574 }
1575 LUSTRE_RW_ATTR(fast_read);
1576
1577 static ssize_t file_heat_show(struct kobject *kobj,
1578                               struct attribute *attr,
1579                               char *buf)
1580 {
1581         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1582                                               ll_kset.kobj);
1583
1584         return scnprintf(buf, PAGE_SIZE, "%u\n",
1585                          test_bit(LL_SBI_FILE_HEAT, sbi->ll_flags));
1586 }
1587
1588 static ssize_t file_heat_store(struct kobject *kobj,
1589                                struct attribute *attr,
1590                                const char *buffer,
1591                                size_t count)
1592 {
1593         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1594                                               ll_kset.kobj);
1595         bool val;
1596         int rc;
1597
1598         rc = kstrtobool(buffer, &val);
1599         if (rc)
1600                 return rc;
1601
1602         spin_lock(&sbi->ll_lock);
1603         if (val)
1604                 set_bit(LL_SBI_FILE_HEAT, sbi->ll_flags);
1605         else
1606                 clear_bit(LL_SBI_FILE_HEAT, sbi->ll_flags);
1607         spin_unlock(&sbi->ll_lock);
1608
1609         return count;
1610 }
1611 LUSTRE_RW_ATTR(file_heat);
1612
1613 static ssize_t heat_decay_percentage_show(struct kobject *kobj,
1614                                           struct attribute *attr,
1615                                           char *buf)
1616 {
1617         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1618                                               ll_kset.kobj);
1619
1620         return scnprintf(buf, PAGE_SIZE, "%u\n",
1621                          (sbi->ll_heat_decay_weight * 100 + 128) / 256);
1622 }
1623
1624 static ssize_t heat_decay_percentage_store(struct kobject *kobj,
1625                                            struct attribute *attr,
1626                                            const char *buffer,
1627                                            size_t count)
1628 {
1629         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1630                                               ll_kset.kobj);
1631         unsigned long val;
1632         int rc;
1633
1634         rc = kstrtoul(buffer, 10, &val);
1635         if (rc)
1636                 return rc;
1637
1638         if (val < 0 || val > 100)
1639                 return -ERANGE;
1640
1641         sbi->ll_heat_decay_weight = (val * 256 + 50) / 100;
1642
1643         return count;
1644 }
1645 LUSTRE_RW_ATTR(heat_decay_percentage);
1646
1647 static ssize_t heat_period_second_show(struct kobject *kobj,
1648                                        struct attribute *attr,
1649                                        char *buf)
1650 {
1651         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1652                                               ll_kset.kobj);
1653
1654         return scnprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_heat_period_second);
1655 }
1656
1657 static ssize_t heat_period_second_store(struct kobject *kobj,
1658                                         struct attribute *attr,
1659                                         const char *buffer,
1660                                         size_t count)
1661 {
1662         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1663                                               ll_kset.kobj);
1664         unsigned long val;
1665         int rc;
1666
1667         rc = kstrtoul(buffer, 10, &val);
1668         if (rc)
1669                 return rc;
1670
1671         if (val <= 0)
1672                 return -ERANGE;
1673
1674         sbi->ll_heat_period_second = val;
1675
1676         return count;
1677 }
1678 LUSTRE_RW_ATTR(heat_period_second);
1679
1680 static ssize_t opencache_threshold_count_show(struct kobject *kobj,
1681                                               struct attribute *attr,
1682                                               char *buf)
1683 {
1684         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1685                                               ll_kset.kobj);
1686
1687         if (sbi->ll_oc_thrsh_count)
1688                 return snprintf(buf, PAGE_SIZE, "%u\n",
1689                                 sbi->ll_oc_thrsh_count);
1690         else
1691                 return snprintf(buf, PAGE_SIZE, "off\n");
1692 }
1693
1694 static ssize_t opencache_threshold_count_store(struct kobject *kobj,
1695                                                struct attribute *attr,
1696                                                const char *buffer,
1697                                                size_t count)
1698 {
1699         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1700                                               ll_kset.kobj);
1701         unsigned int val;
1702         int rc;
1703
1704         rc = kstrtouint(buffer, 10, &val);
1705         if (rc) {
1706                 bool enable;
1707                 /* also accept "off" to disable and "on" to always cache */
1708                 rc = kstrtobool(buffer, &enable);
1709                 if (rc)
1710                         return rc;
1711                 val = enable;
1712         }
1713         sbi->ll_oc_thrsh_count = val;
1714
1715         return count;
1716 }
1717 LUSTRE_RW_ATTR(opencache_threshold_count);
1718
1719 static ssize_t opencache_threshold_ms_show(struct kobject *kobj,
1720                                            struct attribute *attr,
1721                                            char *buf)
1722 {
1723         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1724                                               ll_kset.kobj);
1725
1726         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_oc_thrsh_ms);
1727 }
1728
1729 static ssize_t opencache_threshold_ms_store(struct kobject *kobj,
1730                                             struct attribute *attr,
1731                                             const char *buffer,
1732                                             size_t count)
1733 {
1734         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1735                                               ll_kset.kobj);
1736         unsigned int val;
1737         int rc;
1738
1739         rc = kstrtouint(buffer, 10, &val);
1740         if (rc)
1741                 return rc;
1742
1743         sbi->ll_oc_thrsh_ms = val;
1744
1745         return count;
1746 }
1747 LUSTRE_RW_ATTR(opencache_threshold_ms);
1748
1749 static ssize_t opencache_max_ms_show(struct kobject *kobj,
1750                                      struct attribute *attr,
1751                                      char *buf)
1752 {
1753         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1754                                               ll_kset.kobj);
1755
1756         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_oc_max_ms);
1757 }
1758
1759 static ssize_t opencache_max_ms_store(struct kobject *kobj,
1760                                       struct attribute *attr,
1761                                       const char *buffer,
1762                                       size_t count)
1763 {
1764         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1765                                               ll_kset.kobj);
1766         unsigned int val;
1767         int rc;
1768
1769         rc = kstrtouint(buffer, 10, &val);
1770         if (rc)
1771                 return rc;
1772
1773         sbi->ll_oc_max_ms = val;
1774
1775         return count;
1776 }
1777 LUSTRE_RW_ATTR(opencache_max_ms);
1778
1779 static ssize_t inode_cache_show(struct kobject *kobj,
1780                                 struct attribute *attr,
1781                                 char *buf)
1782 {
1783         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1784                                               ll_kset.kobj);
1785
1786         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_inode_cache_enabled);
1787 }
1788
1789 static ssize_t inode_cache_store(struct kobject *kobj,
1790                                  struct attribute *attr,
1791                                  const char *buffer,
1792                                  size_t count)
1793 {
1794         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1795                                               ll_kset.kobj);
1796         bool val;
1797         int rc;
1798
1799         rc = kstrtobool(buffer, &val);
1800         if (rc)
1801                 return rc;
1802
1803         sbi->ll_inode_cache_enabled = val;
1804
1805         return count;
1806 }
1807 LUSTRE_RW_ATTR(inode_cache);
1808
1809 static int ll_unstable_stats_seq_show(struct seq_file *m, void *v)
1810 {
1811         struct super_block      *sb    = m->private;
1812         struct ll_sb_info       *sbi   = ll_s2sbi(sb);
1813         struct cl_client_cache  *cache = sbi->ll_cache;
1814         long pages;
1815         int mb;
1816
1817         pages = atomic_long_read(&cache->ccc_unstable_nr);
1818         mb    = (pages * PAGE_SIZE) >> 20;
1819
1820         seq_printf(m, "unstable_check:     %8d\n"
1821                       "unstable_pages: %12ld\n"
1822                       "unstable_mb:        %8d\n",
1823                    cache->ccc_unstable_check, pages, mb);
1824         return 0;
1825 }
1826
1827 static ssize_t ll_unstable_stats_seq_write(struct file *file,
1828                                            const char __user *buffer,
1829                                            size_t count, loff_t *unused)
1830 {
1831         struct seq_file *seq = file->private_data;
1832         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)seq->private);
1833         char kernbuf[128];
1834         bool val;
1835         int rc;
1836
1837         if (count == 0)
1838                 return 0;
1839         if (count >= sizeof(kernbuf))
1840                 return -EINVAL;
1841
1842         if (copy_from_user(kernbuf, buffer, count))
1843                 return -EFAULT;
1844         kernbuf[count] = 0;
1845
1846         buffer += lprocfs_find_named_value(kernbuf, "unstable_check:", &count) -
1847                   kernbuf;
1848         rc = kstrtobool_from_user(buffer, count, &val);
1849         if (rc < 0)
1850                 return rc;
1851
1852         /* borrow lru lock to set the value */
1853         spin_lock(&sbi->ll_cache->ccc_lru_lock);
1854         sbi->ll_cache->ccc_unstable_check = val;
1855         spin_unlock(&sbi->ll_cache->ccc_lru_lock);
1856
1857         return count;
1858 }
1859
1860 LDEBUGFS_SEQ_FOPS(ll_unstable_stats);
1861
1862 static int ll_root_squash_seq_show(struct seq_file *m, void *v)
1863 {
1864         struct super_block *sb = m->private;
1865         struct ll_sb_info *sbi = ll_s2sbi(sb);
1866         struct root_squash_info *squash = &sbi->ll_squash;
1867
1868         seq_printf(m, "%u:%u\n", squash->rsi_uid, squash->rsi_gid);
1869         return 0;
1870 }
1871
1872 static ssize_t ll_root_squash_seq_write(struct file *file,
1873                                         const char __user *buffer,
1874                                         size_t count, loff_t *off)
1875 {
1876         struct seq_file *m = file->private_data;
1877         struct super_block *sb = m->private;
1878         struct ll_sb_info *sbi = ll_s2sbi(sb);
1879         struct root_squash_info *squash = &sbi->ll_squash;
1880
1881         return lprocfs_wr_root_squash(buffer, count, squash, sbi->ll_fsname);
1882 }
1883
1884 LDEBUGFS_SEQ_FOPS(ll_root_squash);
1885
1886 static int ll_nosquash_nids_seq_show(struct seq_file *m, void *v)
1887 {
1888         struct super_block *sb = m->private;
1889         struct ll_sb_info *sbi = ll_s2sbi(sb);
1890         struct root_squash_info *squash = &sbi->ll_squash;
1891         int len;
1892
1893         spin_lock(&squash->rsi_lock);
1894         if (!list_empty(&squash->rsi_nosquash_nids)) {
1895                 len = cfs_print_nidlist(m->buf + m->count, m->size - m->count,
1896                                         &squash->rsi_nosquash_nids);
1897                 m->count += len;
1898                 seq_putc(m, '\n');
1899         } else {
1900                 seq_puts(m, "NONE\n");
1901         }
1902         spin_unlock(&squash->rsi_lock);
1903
1904         return 0;
1905 }
1906
1907 static ssize_t ll_nosquash_nids_seq_write(struct file *file,
1908                                           const char __user *buffer,
1909                                           size_t count, loff_t *off)
1910 {
1911         struct seq_file *m = file->private_data;
1912         struct super_block *sb = m->private;
1913         struct ll_sb_info *sbi = ll_s2sbi(sb);
1914         struct root_squash_info *squash = &sbi->ll_squash;
1915         int rc;
1916
1917         rc = lprocfs_wr_nosquash_nids(buffer, count, squash, sbi->ll_fsname);
1918         if (rc < 0)
1919                 return rc;
1920
1921         ll_compute_rootsquash_state(sbi);
1922
1923         return rc;
1924 }
1925
1926 LDEBUGFS_SEQ_FOPS(ll_nosquash_nids);
1927
1928 #if defined(CONFIG_LL_ENCRYPTION)
1929 static ssize_t enable_filename_encryption_show(struct kobject *kobj,
1930                                                struct attribute *attr,
1931                                                char *buffer)
1932 {
1933         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1934                                               ll_kset.kobj);
1935         struct lustre_sb_info *lsi = sbi->lsi;
1936
1937         return snprintf(buffer, PAGE_SIZE,  "%u\n",
1938                         lsi->lsi_flags & LSI_FILENAME_ENC ? 1 : 0);
1939 }
1940
1941 static ssize_t enable_filename_encryption_store(struct kobject *kobj,
1942                                                 struct attribute *attr,
1943                                                 const char *buffer,
1944                                                 size_t count)
1945 {
1946         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1947                                               ll_kset.kobj);
1948         struct lustre_sb_info *lsi = sbi->lsi;
1949         bool val;
1950         int rc;
1951
1952         rc = kstrtobool(buffer, &val);
1953         if (rc)
1954                 return rc;
1955
1956         if (val) {
1957                 if (!ll_sbi_has_name_encrypt(sbi)) {
1958                         /* server does not support name encryption,
1959                          * so force it to NULL on client
1960                          */
1961                         CDEBUG(D_SEC, "%s: server does not support name encryption\n",
1962                                sbi->ll_fsname);
1963                         lsi->lsi_flags &= ~LSI_FILENAME_ENC;
1964                         return -EOPNOTSUPP;
1965                 }
1966
1967                 lsi->lsi_flags |= LSI_FILENAME_ENC;
1968         } else {
1969                 lsi->lsi_flags &= ~LSI_FILENAME_ENC;
1970         }
1971
1972         return count;
1973 }
1974
1975 LUSTRE_RW_ATTR(enable_filename_encryption);
1976 #endif /* CONFIG_LL_ENCRYPTION */
1977
1978 #if defined(CONFIG_LL_ENCRYPTION) || defined(HAVE_LUSTRE_CRYPTO)
1979 static ssize_t filename_enc_use_old_base64_show(struct kobject *kobj,
1980                                                 struct attribute *attr,
1981                                                 char *buffer)
1982 {
1983         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1984                                               ll_kset.kobj);
1985         struct lustre_sb_info *lsi = sbi->lsi;
1986
1987         return snprintf(buffer, PAGE_SIZE, "%u\n",
1988                         lsi->lsi_flags & LSI_FILENAME_ENC_B64_OLD_CLI ? 1 : 0);
1989 }
1990
1991 static ssize_t filename_enc_use_old_base64_store(struct kobject *kobj,
1992                                                  struct attribute *attr,
1993                                                  const char *buffer,
1994                                                  size_t count)
1995 {
1996         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1997                                               ll_kset.kobj);
1998         struct lustre_sb_info *lsi = sbi->lsi;
1999         bool val;
2000         int rc;
2001
2002         rc = kstrtobool(buffer, &val);
2003         if (rc)
2004                 return rc;
2005
2006         if (val) {
2007                 if (!ll_sbi_has_name_encrypt(sbi)) {
2008                         /* server does not support name encryption,
2009                          * so force it to NULL on client
2010                          */
2011                         CDEBUG(D_SEC,
2012                                "%s: server does not support name encryption\n",
2013                                sbi->ll_fsname);
2014                         lsi->lsi_flags &= ~LSI_FILENAME_ENC_B64_OLD_CLI;
2015                         return -EOPNOTSUPP;
2016                 }
2017
2018                 lsi->lsi_flags |= LSI_FILENAME_ENC_B64_OLD_CLI;
2019         } else {
2020                 lsi->lsi_flags &= ~LSI_FILENAME_ENC_B64_OLD_CLI;
2021         }
2022
2023         return count;
2024 }
2025
2026 LUSTRE_RW_ATTR(filename_enc_use_old_base64);
2027 #endif /* CONFIG_LL_ENCRYPTION || HAVE_LUSTRE_CRYPTO */
2028
2029 static int ll_pcc_seq_show(struct seq_file *m, void *v)
2030 {
2031         struct super_block *sb = m->private;
2032         struct ll_sb_info *sbi = ll_s2sbi(sb);
2033
2034         return pcc_super_dump(&sbi->ll_pcc_super, m);
2035 }
2036
2037 static ssize_t ll_pcc_seq_write(struct file *file, const char __user *buffer,
2038                                 size_t count, loff_t *off)
2039 {
2040         struct seq_file *m = file->private_data;
2041         struct super_block *sb = m->private;
2042         struct ll_sb_info *sbi = ll_s2sbi(sb);
2043         int rc;
2044         char *kernbuf;
2045
2046         if (count >= LPROCFS_WR_PCC_MAX_CMD)
2047                 return -EINVAL;
2048
2049         if (!(exp_connect_flags2(sbi->ll_md_exp) & OBD_CONNECT2_PCC))
2050                 return -EOPNOTSUPP;
2051
2052         OBD_ALLOC(kernbuf, count + 1);
2053         if (kernbuf == NULL)
2054                 return -ENOMEM;
2055
2056         if (copy_from_user(kernbuf, buffer, count))
2057                 GOTO(out_free_kernbuff, rc = -EFAULT);
2058
2059         rc = pcc_cmd_handle(kernbuf, count, &sbi->ll_pcc_super);
2060 out_free_kernbuff:
2061         OBD_FREE(kernbuf, count + 1);
2062         return rc ? rc : count;
2063 }
2064 LDEBUGFS_SEQ_FOPS(ll_pcc);
2065
2066 struct ldebugfs_vars lprocfs_llite_obd_vars[] = {
2067         { .name =       "site",
2068           .fops =       &ll_site_stats_fops                     },
2069         { .name =       "max_cached_mb",
2070           .fops =       &ll_max_cached_mb_fops                  },
2071         { .name =       "statahead_stats",
2072           .fops =       &ll_statahead_stats_fops                },
2073         { .name =       "unstable_stats",
2074           .fops =       &ll_unstable_stats_fops                 },
2075         { .name =       "sbi_flags",
2076           .fops =       &ll_sbi_flags_fops                      },
2077         { .name =       "root_squash",
2078           .fops =       &ll_root_squash_fops                    },
2079         { .name =       "nosquash_nids",
2080           .fops =       &ll_nosquash_nids_fops                  },
2081         { .name =       "pcc",
2082           .fops =       &ll_pcc_fops,                           },
2083         { NULL }
2084 };
2085
2086 #define MAX_STRING_SIZE 128
2087
2088 static struct attribute *llite_attrs[] = {
2089         &lustre_attr_blocksize.attr,
2090         &lustre_attr_stat_blocksize.attr,
2091         &lustre_attr_kbytestotal.attr,
2092         &lustre_attr_kbytesfree.attr,
2093         &lustre_attr_kbytesavail.attr,
2094         &lustre_attr_filestotal.attr,
2095         &lustre_attr_filesfree.attr,
2096         &lustre_attr_client_type.attr,
2097         &lustre_attr_foreign_symlink_enable.attr,
2098         &lustre_attr_foreign_symlink_prefix.attr,
2099         &lustre_attr_foreign_symlink_upcall.attr,
2100         &lustre_attr_foreign_symlink_upcall_info.attr,
2101         &lustre_attr_fstype.attr,
2102         &lustre_attr_uuid.attr,
2103         &lustre_attr_checksums.attr,
2104         &lustre_attr_checksum_pages.attr,
2105         &lustre_attr_max_read_ahead_mb.attr,
2106         &lustre_attr_max_read_ahead_per_file_mb.attr,
2107         &lustre_attr_max_read_ahead_whole_mb.attr,
2108         &lustre_attr_max_read_ahead_async_active.attr,
2109         &lustre_attr_read_ahead_async_file_threshold_mb.attr,
2110         &lustre_attr_read_ahead_range_kb.attr,
2111         &lustre_attr_stats_track_pid.attr,
2112         &lustre_attr_stats_track_ppid.attr,
2113         &lustre_attr_stats_track_gid.attr,
2114         &lustre_attr_enable_statahead_fname.attr,
2115         &lustre_attr_statahead_running_max.attr,
2116         &lustre_attr_statahead_batch_max.attr,
2117         &lustre_attr_statahead_max.attr,
2118         &lustre_attr_statahead_min.attr,
2119         &lustre_attr_statahead_timeout.attr,
2120         &lustre_attr_statahead_agl.attr,
2121         &lustre_attr_lazystatfs.attr,
2122         &lustre_attr_statfs_max_age.attr,
2123         &lustre_attr_statfs_project.attr,
2124         &lustre_attr_max_easize.attr,
2125         &lustre_attr_default_easize.attr,
2126         &lustre_attr_xattr_cache.attr,
2127         &lustre_attr_intent_mkdir.attr,
2128         &lustre_attr_fast_read.attr,
2129         &lustre_attr_tiny_write.attr,
2130         &lustre_attr_parallel_dio.attr,
2131         &lustre_attr_unaligned_dio.attr,
2132         &lustre_attr_hybrid_io.attr,
2133         &lustre_attr_file_heat.attr,
2134         &lustre_attr_heat_decay_percentage.attr,
2135         &lustre_attr_heat_period_second.attr,
2136         &lustre_attr_opencache_threshold_count.attr,
2137         &lustre_attr_opencache_threshold_ms.attr,
2138         &lustre_attr_opencache_max_ms.attr,
2139         &lustre_attr_inode_cache.attr,
2140 #ifdef CONFIG_LL_ENCRYPTION
2141         &lustre_attr_enable_filename_encryption.attr,
2142 #endif
2143 #if defined(CONFIG_LL_ENCRYPTION) || defined(HAVE_LUSTRE_CRYPTO)
2144         &lustre_attr_filename_enc_use_old_base64.attr,
2145 #endif
2146         NULL,
2147 };
2148
2149 KOBJ_ATTRIBUTE_GROUPS(llite); /* creates llite_groups */
2150
2151 static void sbi_kobj_release(struct kobject *kobj)
2152 {
2153         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
2154                                               ll_kset.kobj);
2155         complete(&sbi->ll_kobj_unregister);
2156 }
2157
2158 static struct kobj_type sbi_ktype = {
2159         .default_groups = KOBJ_ATTR_GROUPS(llite),
2160         .sysfs_ops      = &lustre_sysfs_ops,
2161         .release        = sbi_kobj_release,
2162 };
2163
2164 static const struct llite_file_opcode {
2165         __u32                           lfo_opcode;
2166         enum lprocfs_counter_config     lfo_config;
2167         const char                      *lfo_opname;
2168 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
2169         /* file operation */
2170         { LPROC_LL_READ_BYTES,  LPROCFS_TYPE_BYTES_FULL, "read_bytes" },
2171         { LPROC_LL_WRITE_BYTES, LPROCFS_TYPE_BYTES_FULL, "write_bytes" },
2172         { LPROC_LL_READ,        LPROCFS_TYPE_LATENCY,   "read" },
2173         { LPROC_LL_WRITE,       LPROCFS_TYPE_LATENCY,   "write" },
2174         { LPROC_LL_IOCTL,       LPROCFS_TYPE_REQS,      "ioctl" },
2175         { LPROC_LL_OPEN,        LPROCFS_TYPE_LATENCY,   "open" },
2176         { LPROC_LL_RELEASE,     LPROCFS_TYPE_LATENCY,   "close" },
2177         { LPROC_LL_MMAP,        LPROCFS_TYPE_LATENCY,   "mmap" },
2178         { LPROC_LL_FAULT,       LPROCFS_TYPE_LATENCY,   "page_fault" },
2179         { LPROC_LL_MKWRITE,     LPROCFS_TYPE_LATENCY,   "page_mkwrite" },
2180         { LPROC_LL_LLSEEK,      LPROCFS_TYPE_LATENCY,   "seek" },
2181         { LPROC_LL_FSYNC,       LPROCFS_TYPE_LATENCY,   "fsync" },
2182         { LPROC_LL_READDIR,     LPROCFS_TYPE_LATENCY,   "readdir" },
2183         { LPROC_LL_INODE_OCOUNT, LPROCFS_TYPE_REQS | LPROCFS_CNTR_AVGMINMAX |
2184                                 LPROCFS_CNTR_STDDEV,    "opencount" },
2185         { LPROC_LL_INODE_OPCLTM, LPROCFS_TYPE_LATENCY,  "openclosetime" },
2186         /* inode operation */
2187         { LPROC_LL_SETATTR,     LPROCFS_TYPE_LATENCY,   "setattr" },
2188         { LPROC_LL_TRUNC,       LPROCFS_TYPE_LATENCY,   "truncate" },
2189         { LPROC_LL_FLOCK,       LPROCFS_TYPE_LATENCY,   "flock" },
2190         { LPROC_LL_GETATTR,     LPROCFS_TYPE_LATENCY,   "getattr" },
2191         { LPROC_LL_FALLOCATE,   LPROCFS_TYPE_LATENCY,   "fallocate"},
2192         /* dir inode operation */
2193         { LPROC_LL_CREATE,      LPROCFS_TYPE_LATENCY,   "create" },
2194         { LPROC_LL_LINK,        LPROCFS_TYPE_LATENCY,   "link" },
2195         { LPROC_LL_UNLINK,      LPROCFS_TYPE_LATENCY,   "unlink" },
2196         { LPROC_LL_SYMLINK,     LPROCFS_TYPE_LATENCY,   "symlink" },
2197         { LPROC_LL_MKDIR,       LPROCFS_TYPE_LATENCY,   "mkdir" },
2198         { LPROC_LL_RMDIR,       LPROCFS_TYPE_LATENCY,   "rmdir" },
2199         { LPROC_LL_MKNOD,       LPROCFS_TYPE_LATENCY,   "mknod" },
2200         { LPROC_LL_RENAME,      LPROCFS_TYPE_LATENCY,   "rename" },
2201         /* special inode operation */
2202         { LPROC_LL_STATFS,      LPROCFS_TYPE_LATENCY,   "statfs" },
2203         { LPROC_LL_SETXATTR,    LPROCFS_TYPE_LATENCY,   "setxattr" },
2204         { LPROC_LL_GETXATTR,    LPROCFS_TYPE_LATENCY,   "getxattr" },
2205         { LPROC_LL_GETXATTR_HITS, LPROCFS_TYPE_REQS,    "getxattr_hits" },
2206         { LPROC_LL_LISTXATTR,   LPROCFS_TYPE_LATENCY,   "listxattr" },
2207         { LPROC_LL_REMOVEXATTR, LPROCFS_TYPE_LATENCY,   "removexattr" },
2208         { LPROC_LL_INODE_PERM,  LPROCFS_TYPE_LATENCY,   "inode_permission" },
2209 };
2210
2211 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, long count)
2212 {
2213         if (!sbi->ll_stats)
2214                 return;
2215
2216         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
2217                 lprocfs_counter_add(sbi->ll_stats, op, count);
2218         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
2219                  sbi->ll_stats_track_id == current->pid)
2220                 lprocfs_counter_add(sbi->ll_stats, op, count);
2221         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
2222                  sbi->ll_stats_track_id == current->real_parent->pid)
2223                 lprocfs_counter_add(sbi->ll_stats, op, count);
2224         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
2225                  sbi->ll_stats_track_id ==
2226                         from_kgid(&init_user_ns, current_gid()))
2227                 lprocfs_counter_add(sbi->ll_stats, op, count);
2228 }
2229 EXPORT_SYMBOL(ll_stats_ops_tally);
2230
2231 static const char *const ra_stat_string[] = {
2232         [RA_STAT_HIT]                   = "hits",
2233         [RA_STAT_MISS]                  = "misses",
2234         [RA_STAT_DISTANT_READPAGE]      = "readpage_not_consecutive",
2235         [RA_STAT_MISS_IN_WINDOW]        = "miss_inside_window",
2236         [RA_STAT_FAILED_GRAB_PAGE]      = "failed_grab_cache_page",
2237         [RA_STAT_FAILED_MATCH]          = "failed_lock_match",
2238         [RA_STAT_DISCARDED]             = "read_but_discarded",
2239         [RA_STAT_ZERO_LEN]              = "zero_length_file",
2240         [RA_STAT_ZERO_WINDOW]           = "zero_size_window",
2241         [RA_STAT_EOF]                   = "readahead_to_eof",
2242         [RA_STAT_MAX_IN_FLIGHT]         = "hit_max_readahead_issue",
2243         [RA_STAT_WRONG_GRAB_PAGE]       = "wrong_page_from_grab_cache_page",
2244         [RA_STAT_FAILED_REACH_END]      = "failed_to_reach_end",
2245         [RA_STAT_ASYNC]                 = "async_readahead",
2246         [RA_STAT_FAILED_FAST_READ]      = "failed_to_fast_read",
2247         [RA_STAT_MMAP_RANGE_READ]       = "mmap_range_read",
2248         [RA_STAT_READAHEAD_PAGES]       = "readahead_pages"
2249 };
2250
2251 int ll_debugfs_register_super(struct super_block *sb, const char *name)
2252 {
2253         struct lustre_sb_info *lsi = s2lsi(sb);
2254         struct ll_sb_info *sbi = ll_s2sbi(sb);
2255         int err, id;
2256
2257         ENTRY;
2258         LASSERT(sbi);
2259
2260         if (IS_ERR_OR_NULL(llite_root))
2261                 goto out_ll_kset;
2262
2263         sbi->ll_debugfs_entry = debugfs_create_dir(name, llite_root);
2264         ldebugfs_add_vars(sbi->ll_debugfs_entry, lprocfs_llite_obd_vars, sb);
2265
2266         debugfs_create_file("dump_page_cache", 0444, sbi->ll_debugfs_entry, sbi,
2267                             &vvp_dump_pgcache_file_ops);
2268
2269         debugfs_create_file("extents_stats", 0644, sbi->ll_debugfs_entry, sbi,
2270                                  &ll_rw_extents_stats_fops);
2271
2272         debugfs_create_file("extents_stats_per_process", 0644,
2273                             sbi->ll_debugfs_entry, sbi,
2274                             &ll_rw_extents_stats_pp_fops);
2275
2276         debugfs_create_file("offset_stats", 0644, sbi->ll_debugfs_entry, sbi,
2277                             &ll_rw_offset_stats_fops);
2278
2279         /* File operations stats */
2280         sbi->ll_stats = lprocfs_stats_alloc(LPROC_LL_FILE_OPCODES,
2281                                             LPROCFS_STATS_FLAG_NONE);
2282         if (sbi->ll_stats == NULL)
2283                 GOTO(out_debugfs, err = -ENOMEM);
2284
2285         /* do counter init */
2286         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++)
2287                 lprocfs_counter_init(sbi->ll_stats,
2288                                      llite_opcode_table[id].lfo_opcode,
2289                                      llite_opcode_table[id].lfo_config,
2290                                      llite_opcode_table[id].lfo_opname);
2291
2292         debugfs_create_file("stats", 0644, sbi->ll_debugfs_entry,
2293                             sbi->ll_stats, &ldebugfs_stats_seq_fops);
2294
2295         sbi->ll_ra_stats = lprocfs_stats_alloc(ARRAY_SIZE(ra_stat_string),
2296                                                LPROCFS_STATS_FLAG_NONE);
2297         if (sbi->ll_ra_stats == NULL)
2298                 GOTO(out_stats, err = -ENOMEM);
2299
2300         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++) {
2301                 if (id == RA_STAT_READAHEAD_PAGES)
2302                         lprocfs_counter_init(sbi->ll_ra_stats, id,
2303                                              LPROCFS_TYPE_PAGES |
2304                                              LPROCFS_CNTR_AVGMINMAX,
2305                                              ra_stat_string[id]);
2306                 else
2307                         lprocfs_counter_init(sbi->ll_ra_stats, id,
2308                                              LPROCFS_TYPE_PAGES,
2309                                              ra_stat_string[id]);
2310         }
2311
2312         debugfs_create_file("read_ahead_stats", 0644, sbi->ll_debugfs_entry,
2313                             sbi->ll_ra_stats, &ldebugfs_stats_seq_fops);
2314
2315 out_ll_kset:
2316         /* Yes we also register sysfs mount kset here as well */
2317         sbi->ll_kset.kobj.parent = llite_kobj;
2318         sbi->ll_kset.kobj.ktype = &sbi_ktype;
2319         init_completion(&sbi->ll_kobj_unregister);
2320         err = kobject_set_name(&sbi->ll_kset.kobj, "%s", name);
2321         if (err)
2322                 GOTO(out_ra_stats, err);
2323
2324         err = kset_register(&sbi->ll_kset);
2325         if (err)
2326                 GOTO(out_ra_stats, err);
2327
2328         lsi->lsi_kobj = kobject_get(&sbi->ll_kset.kobj);
2329
2330         RETURN(0);
2331 out_ra_stats:
2332         lprocfs_stats_free(&sbi->ll_ra_stats);
2333 out_stats:
2334         lprocfs_stats_free(&sbi->ll_stats);
2335 out_debugfs:
2336         debugfs_remove_recursive(sbi->ll_debugfs_entry);
2337
2338         RETURN(err);
2339 }
2340
2341 void ll_debugfs_unregister_super(struct super_block *sb)
2342 {
2343         struct lustre_sb_info *lsi = s2lsi(sb);
2344         struct ll_sb_info *sbi = ll_s2sbi(sb);
2345
2346         debugfs_remove_recursive(sbi->ll_debugfs_entry);
2347
2348         if (sbi->ll_dt_obd)
2349                 sysfs_remove_link(&sbi->ll_kset.kobj,
2350                                   sbi->ll_dt_obd->obd_type->typ_name);
2351
2352         if (sbi->ll_md_obd)
2353                 sysfs_remove_link(&sbi->ll_kset.kobj,
2354                                   sbi->ll_md_obd->obd_type->typ_name);
2355
2356         kobject_put(lsi->lsi_kobj);
2357
2358         kset_unregister(&sbi->ll_kset);
2359         wait_for_completion(&sbi->ll_kobj_unregister);
2360
2361         lprocfs_stats_free(&sbi->ll_ra_stats);
2362         lprocfs_stats_free(&sbi->ll_stats);
2363 }
2364 #undef MAX_STRING_SIZE
2365
2366 static void ll_display_extents_info(struct ll_rw_extents_info *rw_extents,
2367                                     struct seq_file *seq, int which)
2368 {
2369         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
2370         unsigned long start, end, r, w;
2371         char *unitp = "KMGTPEZY";
2372         int i, units = 10;
2373         struct per_process_info *pp_info;
2374
2375         pp_info = &rw_extents->pp_extents[which];
2376         read_cum = 0;
2377         write_cum = 0;
2378         start = 0;
2379
2380         for (i = 0; i < LL_HIST_MAX; i++) {
2381                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
2382                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
2383         }
2384
2385         for (i = 0; i < LL_HIST_MAX; i++) {
2386                 r = pp_info->pp_r_hist.oh_buckets[i];
2387                 w = pp_info->pp_w_hist.oh_buckets[i];
2388                 read_cum += r;
2389                 write_cum += w;
2390                 end = 1 << (i + LL_HIST_START - units);
2391                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4u %4u  | "
2392                            "%14lu %4u %4u\n", start, *unitp, end, *unitp,
2393                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
2394                            r, pct(r, read_tot), pct(read_cum, read_tot),
2395                            w, pct(w, write_tot), pct(write_cum, write_tot));
2396                 start = end;
2397                 if (start == (1 << 10)) {
2398                         start = 1;
2399                         units += 10;
2400                         unitp++;
2401                 }
2402                 if (read_cum == read_tot && write_cum == write_tot)
2403                         break;
2404         }
2405 }
2406
2407 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
2408 {
2409         struct ll_sb_info *sbi = seq->private;
2410         struct ll_rw_extents_info *rw_extents = sbi->ll_rw_extents_info;
2411         int k;
2412
2413         if (!sbi->ll_rw_stats_on || !rw_extents) {
2414                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
2415                 return 0;
2416         }
2417
2418         spin_lock(&sbi->ll_pp_extent_lock);
2419         lprocfs_stats_header(seq, ktime_get_real(), rw_extents->pp_init, 25,
2420                              ":", true, "");
2421         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
2422         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
2423                    "extents", "calls", "%", "cum%", "calls", "%", "cum%");
2424
2425         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
2426                 if (rw_extents->pp_extents[k].pid != 0) {
2427                         seq_printf(seq, "\nPID: %d\n",
2428                                    rw_extents->pp_extents[k].pid);
2429                         ll_display_extents_info(rw_extents, seq, k);
2430                 }
2431         }
2432         spin_unlock(&sbi->ll_pp_extent_lock);
2433         return 0;
2434 }
2435
2436 static int alloc_rw_stats_info(struct ll_sb_info *sbi)
2437 {
2438         struct ll_rw_extents_info *rw_extents;
2439         struct ll_rw_process_info *offset;
2440         struct ll_rw_process_info *process;
2441         int i, rc = 0;
2442
2443         OBD_ALLOC(rw_extents, sizeof(*rw_extents));
2444         if (!rw_extents)
2445                 return -ENOMEM;
2446
2447         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
2448                 spin_lock_init(&rw_extents->pp_extents[i].pp_r_hist.oh_lock);
2449                 spin_lock_init(&rw_extents->pp_extents[i].pp_w_hist.oh_lock);
2450         }
2451         rw_extents->pp_init = ktime_get_real();
2452
2453         spin_lock(&sbi->ll_pp_extent_lock);
2454         if (!sbi->ll_rw_extents_info)
2455                 sbi->ll_rw_extents_info = rw_extents;
2456         spin_unlock(&sbi->ll_pp_extent_lock);
2457         /* another writer allocated the struct before we got the lock */
2458         if (sbi->ll_rw_extents_info != rw_extents)
2459                 OBD_FREE(rw_extents, sizeof(*rw_extents));
2460
2461         OBD_ALLOC(process, sizeof(*process) * LL_PROCESS_HIST_MAX);
2462         if (!process)
2463                 GOTO(out, rc = -ENOMEM);
2464         OBD_ALLOC(offset, sizeof(*offset) * LL_OFFSET_HIST_MAX);
2465         if (!offset)
2466                 GOTO(out_free, rc = -ENOMEM);
2467
2468         spin_lock(&sbi->ll_process_lock);
2469         if (!sbi->ll_rw_process_info)
2470                 sbi->ll_rw_process_info = process;
2471         if (!sbi->ll_rw_offset_info)
2472                 sbi->ll_rw_offset_info = offset;
2473         spin_unlock(&sbi->ll_process_lock);
2474         sbi->ll_process_stats_init = ktime_get_real();
2475
2476         /* another writer allocated the structs before we got the lock */
2477         if (sbi->ll_rw_offset_info != offset)
2478                 OBD_FREE(offset, sizeof(*offset) * LL_OFFSET_HIST_MAX);
2479         if (sbi->ll_rw_process_info != process) {
2480 out_free:
2481                 OBD_FREE(process, sizeof(*process) * LL_PROCESS_HIST_MAX);
2482         }
2483
2484 out:
2485         return rc;
2486 }
2487
2488 void ll_free_rw_stats_info(struct ll_sb_info *sbi)
2489 {
2490         if (sbi->ll_rw_extents_info) {
2491                 OBD_FREE(sbi->ll_rw_extents_info,
2492                          sizeof(*sbi->ll_rw_extents_info));
2493                 sbi->ll_rw_extents_info = NULL;
2494         }
2495         if (sbi->ll_rw_offset_info) {
2496                 OBD_FREE(sbi->ll_rw_offset_info,
2497                          sizeof(*sbi->ll_rw_offset_info) * LL_OFFSET_HIST_MAX);
2498                 sbi->ll_rw_offset_info = NULL;
2499         }
2500         if (sbi->ll_rw_process_info) {
2501                 OBD_FREE(sbi->ll_rw_process_info,
2502                         sizeof(*sbi->ll_rw_process_info) * LL_PROCESS_HIST_MAX);
2503                 sbi->ll_rw_process_info = NULL;
2504         }
2505 }
2506
2507 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
2508                                                 const char __user *buf,
2509                                                 size_t len, loff_t *off)
2510 {
2511         struct seq_file *seq = file->private_data;
2512         struct ll_sb_info *sbi = seq->private;
2513         struct ll_rw_extents_info *rw_extents;
2514         int i;
2515         __s64 value;
2516
2517         if (len == 0)
2518                 return -EINVAL;
2519
2520         value = ll_stats_pid_write(buf, len);
2521
2522         if (value == 0) {
2523                 sbi->ll_rw_stats_on = 0;
2524         } else {
2525                 if (!sbi->ll_rw_extents_info) {
2526                         int rc = alloc_rw_stats_info(sbi);
2527
2528                         if (rc)
2529                                 return rc;
2530                 }
2531                 sbi->ll_rw_stats_on = 1;
2532         }
2533
2534
2535         spin_lock(&sbi->ll_pp_extent_lock);
2536         rw_extents = sbi->ll_rw_extents_info;
2537         if (rw_extents) {
2538                 rw_extents->pp_init = ktime_get_real();
2539                 for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
2540                         rw_extents->pp_extents[i].pid = 0;
2541                         lprocfs_oh_clear(&rw_extents->pp_extents[i].pp_r_hist);
2542                         lprocfs_oh_clear(&rw_extents->pp_extents[i].pp_w_hist);
2543                 }
2544         }
2545         spin_unlock(&sbi->ll_pp_extent_lock);
2546
2547         return len;
2548 }
2549
2550 LDEBUGFS_SEQ_FOPS(ll_rw_extents_stats_pp);
2551
2552 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
2553 {
2554         struct ll_sb_info *sbi = seq->private;
2555         struct ll_rw_extents_info *rw_extents = sbi->ll_rw_extents_info;
2556
2557         if (!sbi->ll_rw_stats_on || !rw_extents) {
2558                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
2559                 return 0;
2560         }
2561
2562         spin_lock(&sbi->ll_lock);
2563         lprocfs_stats_header(seq, ktime_get_real(), rw_extents->pp_init, 25,
2564                              ":", true, "");
2565
2566         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
2567         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
2568                    "extents", "calls", "%", "cum%",
2569                    "calls", "%", "cum%");
2570
2571         ll_display_extents_info(rw_extents, seq, LL_PROCESS_HIST_MAX);
2572         spin_unlock(&sbi->ll_lock);
2573
2574         return 0;
2575 }
2576
2577 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
2578                                              const char __user *buf,
2579                                              size_t len, loff_t *off)
2580 {
2581         struct seq_file *seq = file->private_data;
2582         struct ll_sb_info *sbi = seq->private;
2583         struct ll_rw_extents_info *rw_extents;
2584         int i;
2585         __s64 value;
2586
2587         if (len == 0)
2588                 return -EINVAL;
2589
2590         value = ll_stats_pid_write(buf, len);
2591
2592         if (value == 0) {
2593                 sbi->ll_rw_stats_on = 0;
2594         } else {
2595                 if (!sbi->ll_rw_extents_info) {
2596                         int rc = alloc_rw_stats_info(sbi);
2597
2598                         if (rc)
2599                                 return rc;
2600                 }
2601                 sbi->ll_rw_stats_on = 1;
2602         }
2603
2604         spin_lock(&sbi->ll_pp_extent_lock);
2605         rw_extents = sbi->ll_rw_extents_info;
2606         if (rw_extents) {
2607                 rw_extents->pp_init = ktime_get_real();
2608                 for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
2609                         rw_extents->pp_extents[i].pid = 0;
2610                         lprocfs_oh_clear(&rw_extents->pp_extents[i].pp_r_hist);
2611                         lprocfs_oh_clear(&rw_extents->pp_extents[i].pp_w_hist);
2612                 }
2613         }
2614         spin_unlock(&sbi->ll_pp_extent_lock);
2615
2616         return len;
2617 }
2618
2619 LDEBUGFS_SEQ_FOPS(ll_rw_extents_stats);
2620
2621 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
2622                        struct ll_file_data *file, loff_t pos,
2623                        size_t count, int rw)
2624 {
2625         int i, cur = -1;
2626         struct ll_rw_process_info *process;
2627         struct ll_rw_process_info *offset;
2628         int *off_count = &sbi->ll_rw_offset_entry_count;
2629         int *process_count = &sbi->ll_offset_process_count;
2630         struct ll_rw_extents_info *rw_extents;
2631
2632         if (!sbi->ll_rw_stats_on)
2633                 return;
2634
2635         spin_lock(&sbi->ll_pp_extent_lock);
2636         rw_extents = sbi->ll_rw_extents_info;
2637         if (!rw_extents) {
2638                 spin_unlock(&sbi->ll_pp_extent_lock);
2639                 return;
2640         }
2641
2642         /* Extent statistics */
2643         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
2644                 if (rw_extents->pp_extents[i].pid == pid) {
2645                         cur = i;
2646                         break;
2647                 }
2648         }
2649
2650         if (cur == -1) {
2651                 /* new process */
2652                 sbi->ll_extent_process_count =
2653                         (sbi->ll_extent_process_count + 1) %
2654                          LL_PROCESS_HIST_MAX;
2655                 cur = sbi->ll_extent_process_count;
2656                 rw_extents->pp_extents[cur].pid = pid;
2657                 lprocfs_oh_clear(&rw_extents->pp_extents[cur].pp_r_hist);
2658                 lprocfs_oh_clear(&rw_extents->pp_extents[cur].pp_w_hist);
2659         }
2660
2661         for (i = 0; (count >= 1 << (LL_HIST_START + i)) &&
2662              (i < (LL_HIST_MAX - 1)); i++);
2663         if (rw == 0) {
2664                 rw_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
2665                 rw_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
2666         } else {
2667                 rw_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
2668                 rw_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
2669         }
2670         spin_unlock(&sbi->ll_pp_extent_lock);
2671
2672         spin_lock(&sbi->ll_process_lock);
2673         process = sbi->ll_rw_process_info;
2674         offset = sbi->ll_rw_offset_info;
2675         if (!process || !offset)
2676                 goto out_unlock;
2677
2678         /* Offset statistics */
2679         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
2680                 if (process[i].rw_pid == pid) {
2681                         if (process[i].rw_last_file != file) {
2682                                 process[i].rw_range_start = pos;
2683                                 process[i].rw_last_file_pos = pos + count;
2684                                 process[i].rw_smallest_extent = count;
2685                                 process[i].rw_largest_extent = count;
2686                                 process[i].rw_offset = 0;
2687                                 process[i].rw_last_file = file;
2688                                 goto out_unlock;
2689                         }
2690                         if (process[i].rw_last_file_pos != pos) {
2691                                 *off_count =
2692                                         (*off_count + 1) % LL_OFFSET_HIST_MAX;
2693                                 offset[*off_count].rw_op = process[i].rw_op;
2694                                 offset[*off_count].rw_pid = pid;
2695                                 offset[*off_count].rw_range_start =
2696                                         process[i].rw_range_start;
2697                                 offset[*off_count].rw_range_end =
2698                                         process[i].rw_last_file_pos;
2699                                 offset[*off_count].rw_smallest_extent =
2700                                         process[i].rw_smallest_extent;
2701                                 offset[*off_count].rw_largest_extent =
2702                                         process[i].rw_largest_extent;
2703                                 offset[*off_count].rw_offset =
2704                                         process[i].rw_offset;
2705                                 process[i].rw_op = rw;
2706                                 process[i].rw_range_start = pos;
2707                                 process[i].rw_smallest_extent = count;
2708                                 process[i].rw_largest_extent = count;
2709                                 process[i].rw_offset = pos -
2710                                         process[i].rw_last_file_pos;
2711                         }
2712                         if (process[i].rw_smallest_extent > count)
2713                                 process[i].rw_smallest_extent = count;
2714                         if (process[i].rw_largest_extent < count)
2715                                 process[i].rw_largest_extent = count;
2716                         process[i].rw_last_file_pos = pos + count;
2717                         goto out_unlock;
2718                 }
2719         }
2720         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
2721         process[*process_count].rw_pid = pid;
2722         process[*process_count].rw_op = rw;
2723         process[*process_count].rw_range_start = pos;
2724         process[*process_count].rw_last_file_pos = pos + count;
2725         process[*process_count].rw_smallest_extent = count;
2726         process[*process_count].rw_largest_extent = count;
2727         process[*process_count].rw_offset = 0;
2728         process[*process_count].rw_last_file = file;
2729
2730 out_unlock:
2731         spin_unlock(&sbi->ll_process_lock);
2732 }
2733
2734 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
2735 {
2736         struct ll_sb_info *sbi = seq->private;
2737         struct ll_rw_process_info *offset;
2738         struct ll_rw_process_info *process;
2739         int i;
2740
2741         if (!sbi->ll_rw_stats_on) {
2742                 seq_puts(seq,
2743                          "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
2744                 return 0;
2745         }
2746
2747         spin_lock(&sbi->ll_process_lock);
2748         lprocfs_stats_header(seq, ktime_get_real(), sbi->ll_process_stats_init,
2749                              25, ":", true, "");
2750         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
2751                    "R/W", "PID", "RANGE START", "RANGE END",
2752                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
2753
2754         /* We stored the discontiguous offsets here; print them first */
2755         offset = sbi->ll_rw_offset_info;
2756         for (i = 0; offset && i < LL_OFFSET_HIST_MAX; i++) {
2757                 if (offset[i].rw_pid != 0)
2758                         seq_printf(seq,
2759                                   "%3c %10d %14llu %14llu %17lu %17lu %14lld\n",
2760                                    offset[i].rw_op == READ ? 'R' : 'W',
2761                                    offset[i].rw_pid,
2762                                    offset[i].rw_range_start,
2763                                    offset[i].rw_range_end,
2764                                    (unsigned long)offset[i].rw_smallest_extent,
2765                                    (unsigned long)offset[i].rw_largest_extent,
2766                                    offset[i].rw_offset);
2767         }
2768
2769         /* Then print the current offsets for each process */
2770         process = sbi->ll_rw_process_info;
2771         for (i = 0; process && i < LL_PROCESS_HIST_MAX; i++) {
2772                 if (process[i].rw_pid != 0)
2773                         seq_printf(seq,
2774                                   "%3c %10d %14llu %14llu %17lu %17lu %14lld\n",
2775                                    process[i].rw_op == READ ? 'R' : 'W',
2776                                    process[i].rw_pid,
2777                                    process[i].rw_range_start,
2778                                    process[i].rw_last_file_pos,
2779                                    (unsigned long)process[i].rw_smallest_extent,
2780                                    (unsigned long)process[i].rw_largest_extent,
2781                                    process[i].rw_offset);
2782         }
2783         spin_unlock(&sbi->ll_process_lock);
2784
2785         return 0;
2786 }
2787
2788 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
2789                                             const char __user *buf,
2790                                             size_t len, loff_t *off)
2791 {
2792         struct seq_file *seq = file->private_data;
2793         struct ll_sb_info *sbi = seq->private;
2794         __s64 value;
2795
2796         if (len == 0)
2797                 return -EINVAL;
2798
2799         value = ll_stats_pid_write(buf, len);
2800
2801         if (value == 0) {
2802                 sbi->ll_rw_stats_on = 0;
2803         } else {
2804                 if (!sbi->ll_rw_process_info || !sbi->ll_rw_offset_info) {
2805                         int rc = alloc_rw_stats_info(sbi);
2806
2807                         if (rc)
2808                                 return rc;
2809                 }
2810                 sbi->ll_rw_stats_on = 1;
2811         }
2812
2813         spin_lock(&sbi->ll_process_lock);
2814         sbi->ll_offset_process_count = 0;
2815         sbi->ll_rw_offset_entry_count = 0;
2816         sbi->ll_process_stats_init = ktime_get_real();
2817         if (sbi->ll_rw_process_info)
2818                 memset(sbi->ll_rw_process_info, 0,
2819                        sizeof(struct ll_rw_process_info) * LL_PROCESS_HIST_MAX);
2820         if (sbi->ll_rw_offset_info)
2821                 memset(sbi->ll_rw_offset_info, 0,
2822                        sizeof(struct ll_rw_process_info) * LL_OFFSET_HIST_MAX);
2823         spin_unlock(&sbi->ll_process_lock);
2824
2825         return len;
2826 }
2827
2828 LDEBUGFS_SEQ_FOPS(ll_rw_offset_stats);