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
 534         if (pages_number < 0 || pages_number > cfs_totalram_pages()) {
 535                 CERROR("%s: can't set max cache more than %lu MB\n",
 536                        sbi->ll_fsname,
 537                        PAGES_TO_MiB(cfs_totalram_pages()));
 538                 RETURN(-ERANGE);
 539         }
 540         /* Allow enough cache so clients can make well-formed RPCs */
 541         pages_number = max_t(long, pages_number, PTLRPC_MAX_BRW_PAGES);
 542
 543         mutex_lock(&cache->ccc_max_cache_mb_lock);
 544         diff = pages_number - cache->ccc_lru_max;
 545
 546         /* easy - add more LRU slots. */
 547         if (diff >= 0) {
 548                 atomic_long_add(diff, &cache->ccc_lru_left);
 549                 GOTO(out, rc = 0);
 550         }
 551
 552         env = cl_env_get(&refcheck);
 553         if (IS_ERR(env))
 554                 GOTO(out_unlock, rc = PTR_ERR(env));
 555
 556         diff = -diff;
 557         while (diff > 0) {
 558                 long tmp;
 559
 560                 /* reduce LRU budget from free slots. */
 561                 do {
 562                         long lru_left_old, lru_left_new, lru_left_ret;
 563
 564                         lru_left_old = atomic_long_read(&cache->ccc_lru_left);
 565                         if (lru_left_old == 0)
 566                                 break;
 567
 568                         lru_left_new = lru_left_old > diff ?
 569                                         lru_left_old - diff : 0;
 570                         lru_left_ret =
 571                                 atomic_long_cmpxchg(&cache->ccc_lru_left,
 572                                                     lru_left_old,
 573                                                     lru_left_new);
 574                         if (likely(lru_left_old == lru_left_ret)) {
 575                                 diff -= lru_left_old - lru_left_new;
 576                                 nrpages += lru_left_old - lru_left_new;
 577                                 break;
 578                         }
 579                 } while (1);
 580
 581                 if (diff <= 0)
 582                         break;
 583
 584                 if (sbi->ll_dt_exp == NULL) { /* being initialized */
 585                         rc = -ENODEV;
 586                         break;
 587                 }
 588
 589                 /* Request extra free slots to avoid them all being used
 590                  * by other processes before this can continue shrinking.
 591                  */
 592                 tmp = diff + min_t(long, diff, MiB_TO_PAGES(1024));
 593                 /* difficult - have to ask OSCs to drop LRU slots. */
 594                 rc = obd_set_info_async(env, sbi->ll_dt_exp,
 595                                 sizeof(KEY_CACHE_LRU_SHRINK),
 596                                 KEY_CACHE_LRU_SHRINK,
 597                                 sizeof(tmp), &tmp, NULL);
 598                 if (rc < 0)
 599                         break;
 600         }
 601         cl_env_put(env, &refcheck);
 602
 603 out:
 604         if (rc >= 0) {
 605                 cache->ccc_lru_max = pages_number;
 606                 rc = count;
 607         } else {
 608                 atomic_long_add(nrpages, &cache->ccc_lru_left);
 609         }
 610 out_unlock:
 611         mutex_unlock(&cache->ccc_max_cache_mb_lock);
 612         return rc;
 613 }
 614 LDEBUGFS_SEQ_FOPS(ll_max_cached_mb);
 615
 616 static ssize_t checksums_show(struct kobject *kobj, struct attribute *attr,
 617                               char *buf)
 618 {
 619         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 620                                               ll_kset.kobj);
 621
 622         return scnprintf(buf, PAGE_SIZE, "%u\n",
 623                          test_bit(LL_SBI_CHECKSUM, sbi->ll_flags));
 624 }
 625
 626 static ssize_t checksums_store(struct kobject *kobj, struct attribute *attr,
 627                                const char *buffer, size_t count)
 628 {
 629         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 630                                               ll_kset.kobj);
 631         bool val;
 632         int tmp;
 633         int rc;
 634
 635         if (!sbi->ll_dt_exp)
 636                 /* Not set up yet */
 637                 return -EAGAIN;
 638
 639         rc = kstrtobool(buffer, &val);
 640         if (rc)
 641                 return rc;
 642         if (val)
 643                 set_bit(LL_SBI_CHECKSUM, sbi->ll_flags);
 644         else
 645                 clear_bit(LL_SBI_CHECKSUM, sbi->ll_flags);
 646         tmp = val;
 647
 648         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 649                                 KEY_CHECKSUM, sizeof(tmp), &tmp, NULL);
 650         if (rc)
 651                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 652
 653         return count;
 654 }
 655 LUSTRE_RW_ATTR(checksums);
 656
 657 LUSTRE_ATTR(checksum_pages, 0644, checksums_show, checksums_store);
 658
 659 static ssize_t ll_rd_track_id(struct kobject *kobj, char *buf,
 660                               enum stats_track_type type)
 661 {
 662         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 663                                               ll_kset.kobj);
 664
 665         if (sbi->ll_stats_track_type == type)
 666                 return sprintf(buf, "%d\n", sbi->ll_stats_track_id);
 667         else if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 668                 return sprintf(buf, "0 (all)\n");
 669
 670         return sprintf(buf, "untracked\n");
 671 }
 672
 673 static ssize_t ll_wr_track_id(struct kobject *kobj, const char *buffer,
 674                               size_t count, enum stats_track_type type)
 675 {
 676         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 677                                               ll_kset.kobj);
 678         unsigned long pid;
 679         int rc;
 680
 681         rc = kstrtoul(buffer, 10, &pid);
 682         if (rc)
 683                 return rc;
 684
 685         sbi->ll_stats_track_id = pid;
 686         if (pid == 0)
 687                 sbi->ll_stats_track_type = STATS_TRACK_ALL;
 688         else
 689                 sbi->ll_stats_track_type = type;
 690         lprocfs_stats_clear(sbi->ll_stats);
 691         return count;
 692 }
 693
 694 static ssize_t stats_track_pid_show(struct kobject *kobj,
 695                                     struct attribute *attr,
 696                                     char *buf)
 697 {
 698         return ll_rd_track_id(kobj, buf, STATS_TRACK_PID);
 699 }
 700
 701 static ssize_t stats_track_pid_store(struct kobject *kobj,
 702                                      struct attribute *attr,
 703                                      const char *buffer,
 704                                      size_t count)
 705 {
 706         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PID);
 707 }
 708 LUSTRE_RW_ATTR(stats_track_pid);
 709
 710 static ssize_t stats_track_ppid_show(struct kobject *kobj,
 711                                      struct attribute *attr,
 712                                      char *buf)
 713 {
 714         return ll_rd_track_id(kobj, buf, STATS_TRACK_PPID);
 715 }
 716
 717 static ssize_t stats_track_ppid_store(struct kobject *kobj,
 718                                       struct attribute *attr,
 719                                       const char *buffer,
 720                                       size_t count)
 721 {
 722         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PPID);
 723 }
 724 LUSTRE_RW_ATTR(stats_track_ppid);
 725
 726 static ssize_t stats_track_gid_show(struct kobject *kobj,
 727                                     struct attribute *attr,
 728                                     char *buf)
 729 {
 730         return ll_rd_track_id(kobj, buf, STATS_TRACK_GID);
 731 }
 732
 733 static ssize_t stats_track_gid_store(struct kobject *kobj,
 734                                      struct attribute *attr,
 735                                      const char *buffer,
 736                                      size_t count)
 737 {
 738         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_GID);
 739 }
 740 LUSTRE_RW_ATTR(stats_track_gid);
 741
 742 static ssize_t enable_statahead_fname_show(struct kobject *kobj,
 743                                            struct attribute *attr,
 744                                            char *buf)
 745 {
 746         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 747                                               ll_kset.kobj);
 748
 749         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_enable_statahead_fname);
 750 }
 751
 752 static ssize_t enable_statahead_fname_store(struct kobject *kobj,
 753                                             struct attribute *attr,
 754                                             const char *buffer,
 755                                             size_t count)
 756 {
 757         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 758                                               ll_kset.kobj);
 759         bool val;
 760         int rc;
 761
 762         rc = kstrtobool(buffer, &val);
 763         if (rc)
 764                 return rc;
 765
 766         sbi->ll_enable_statahead_fname = val;
 767
 768         return count;
 769 }
 770 LUSTRE_RW_ATTR(enable_statahead_fname);
 771
 772 static ssize_t statahead_running_max_show(struct kobject *kobj,
 773                                           struct attribute *attr,
 774                                           char *buf)
 775 {
 776         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 777                                               ll_kset.kobj);
 778
 779         return scnprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_sa_running_max);
 780 }
 781
 782 static ssize_t statahead_running_max_store(struct kobject *kobj,
 783                                            struct attribute *attr,
 784                                            const char *buffer,
 785                                            size_t count)
 786 {
 787         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 788                                               ll_kset.kobj);
 789         unsigned long val;
 790         int rc;
 791
 792         rc = kstrtoul(buffer, 0, &val);
 793         if (rc)
 794                 return rc;
 795
 796         if (val <= LL_SA_RUNNING_MAX) {
 797                 sbi->ll_sa_running_max = val;
 798                 return count;
 799         }
 800
 801         CERROR("Bad statahead_running_max value %lu. Valid values "
 802                "are in the range [0, %d]\n", val, LL_SA_RUNNING_MAX);
 803
 804         return -ERANGE;
 805 }
 806 LUSTRE_RW_ATTR(statahead_running_max);
 807
 808 static ssize_t statahead_batch_max_show(struct kobject *kobj,
 809                                         struct attribute *attr,
 810                                         char *buf)
 811 {
 812         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 813                                               ll_kset.kobj);
 814
 815         return snprintf(buf, 16, "%u\n", sbi->ll_sa_batch_max);
 816 }
 817
 818 static ssize_t statahead_batch_max_store(struct kobject *kobj,
 819                                          struct attribute *attr,
 820                                          const char *buffer,
 821                                          size_t count)
 822 {
 823         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 824                                               ll_kset.kobj);
 825         unsigned long val;
 826         int rc;
 827
 828         rc = kstrtoul(buffer, 0, &val);
 829         if (rc)
 830                 return rc;
 831
 832         if (val > LL_SA_BATCH_MAX) {
 833                 CWARN("%s: statahead_batch_max value %lu limited to maximum %d\n",
 834                       sbi->ll_fsname, val, LL_SA_BATCH_MAX);
 835                 val = LL_SA_BATCH_MAX;
 836         }
 837
 838         sbi->ll_sa_batch_max = val;
 839         return count;
 840 }
 841 LUSTRE_RW_ATTR(statahead_batch_max);
 842
 843 static ssize_t statahead_max_show(struct kobject *kobj,
 844                                   struct attribute *attr,
 845                                   char *buf)
 846 {
 847         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 848                                               ll_kset.kobj);
 849
 850         return sprintf(buf, "%u\n", sbi->ll_sa_max);
 851 }
 852
 853 static ssize_t statahead_max_store(struct kobject *kobj,
 854                                    struct attribute *attr,
 855                                    const char *buffer,
 856                                    size_t count)
 857 {
 858         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 859                                               ll_kset.kobj);
 860         unsigned long val;
 861         int rc;
 862
 863         rc = kstrtoul(buffer, 0, &val);
 864         if (rc)
 865                 return rc;
 866
 867         if (val > LL_SA_REQ_MAX) {
 868                 CWARN("%s: statahead_max value %lu limited to maximum %d\n",
 869                       sbi->ll_fsname, val, LL_SA_REQ_MAX);
 870                 val = LL_SA_REQ_MAX;
 871         }
 872
 873         sbi->ll_sa_max = val;
 874         return count;
 875 }
 876 LUSTRE_RW_ATTR(statahead_max);
 877
 878 static ssize_t statahead_min_show(struct kobject *kobj,
 879                                   struct attribute *attr,
 880                                   char *buf)
 881 {
 882         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 883                                               ll_kset.kobj);
 884
 885         return scnprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_sa_min);
 886 }
 887
 888 static ssize_t statahead_min_store(struct kobject *kobj,
 889                                    struct attribute *attr,
 890                                    const char *buffer,
 891                                    size_t count)
 892 {
 893         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 894                                               ll_kset.kobj);
 895         unsigned long val;
 896         int rc;
 897
 898         rc = kstrtoul(buffer, 0, &val);
 899         if (rc)
 900                 return rc;
 901
 902         if (val < LL_SA_REQ_MIN)
 903                 CERROR("%s: bad statahead_min %lu < min %u\n",
 904                        sbi->ll_fsname, val, LL_SA_REQ_MIN);
 905         else if (val > sbi->ll_sa_max)
 906                 CERROR("%s: bad statahead_min %lu > max %u\n",
 907                        sbi->ll_fsname, val, sbi->ll_sa_max);
 908         else
 909                 sbi->ll_sa_min = val;
 910
 911         return count;
 912 }
 913 LUSTRE_RW_ATTR(statahead_min);
 914
 915 static ssize_t statahead_timeout_show(struct kobject *kobj,
 916                                       struct attribute *attr,
 917                                       char *buf)
 918 {
 919         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 920                                               ll_kset.kobj);
 921
 922         return scnprintf(buf, PAGE_SIZE, "%lu\n", sbi->ll_sa_timeout);
 923 }
 924
 925 static ssize_t statahead_timeout_store(struct kobject *kobj,
 926                                        struct attribute *attr,
 927                                        const char *buffer,
 928                                        size_t count)
 929 {
 930         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 931                                               ll_kset.kobj);
 932         unsigned long val;
 933         int rc;
 934
 935         rc = kstrtoul(buffer, 0, &val);
 936         if (rc)
 937                 return rc;
 938
 939         sbi->ll_sa_timeout = val;
 940         return count;
 941 }
 942 LUSTRE_RW_ATTR(statahead_timeout);
 943
 944 static ssize_t statahead_agl_show(struct kobject *kobj,
 945                                   struct attribute *attr,
 946                                   char *buf)
 947 {
 948         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 949                                               ll_kset.kobj);
 950
 951         return scnprintf(buf, PAGE_SIZE, "%u\n",
 952                          test_bit(LL_SBI_AGL_ENABLED, sbi->ll_flags));
 953 }
 954
 955 static ssize_t statahead_agl_store(struct kobject *kobj,
 956                                    struct attribute *attr,
 957                                    const char *buffer,
 958                                    size_t count)
 959 {
 960         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 961                                               ll_kset.kobj);
 962         bool val;
 963         int rc;
 964
 965         rc = kstrtobool(buffer, &val);
 966         if (rc)
 967                 return rc;
 968
 969         if (val)
 970                 set_bit(LL_SBI_AGL_ENABLED, sbi->ll_flags);
 971         else
 972                 clear_bit(LL_SBI_AGL_ENABLED, sbi->ll_flags);
 973
 974         return count;
 975 }
 976 LUSTRE_RW_ATTR(statahead_agl);
 977
 978 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
 979 {
 980         struct super_block *sb = m->private;
 981         struct ll_sb_info *sbi = ll_s2sbi(sb);
 982
 983         seq_printf(m, "statahead total: %u\n"
 984                       "statahead wrong: %u\n"
 985                       "agl total: %u\n"
 986                       "list_total: %u\n"
 987                       "fname_total: %u\n"
 988                       "hit_total: %u\n"
 989                       "miss_total: %u\n",
 990                    atomic_read(&sbi->ll_sa_total),
 991                    atomic_read(&sbi->ll_sa_wrong),
 992                    atomic_read(&sbi->ll_agl_total),
 993                    atomic_read(&sbi->ll_sa_list_total),
 994                    atomic_read(&sbi->ll_sa_fname_total),
 995                    atomic_read(&sbi->ll_sa_hit_total),
 996                    atomic_read(&sbi->ll_sa_miss_total));
 997         return 0;
 998 }
 999
1000 static ssize_t ll_statahead_stats_seq_write(struct file *file,
1001                                             const char __user *buffer,
1002                                             size_t count, loff_t *off)
1003 {
1004         struct seq_file *m = file->private_data;
1005         struct super_block *sb = m->private;
1006         struct ll_sb_info *sbi = ll_s2sbi(sb);
1007
1008         atomic_set(&sbi->ll_sa_total, 0);
1009         atomic_set(&sbi->ll_sa_wrong, 0);
1010         atomic_set(&sbi->ll_agl_total, 0);
1011         atomic_set(&sbi->ll_sa_list_total, 0);
1012         atomic_set(&sbi->ll_sa_fname_total, 0);
1013         atomic_set(&sbi->ll_sa_hit_total, 0);
1014         atomic_set(&sbi->ll_sa_miss_total, 0);
1015
1016         return count;
1017 }
1018 LDEBUGFS_SEQ_FOPS(ll_statahead_stats);
1019
1020 static ssize_t lazystatfs_show(struct kobject *kobj,
1021                                struct attribute *attr,
1022                                char *buf)
1023 {
1024         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1025                                               ll_kset.kobj);
1026
1027         return scnprintf(buf, PAGE_SIZE, "%u\n",
1028                          test_bit(LL_SBI_LAZYSTATFS, sbi->ll_flags));
1029 }
1030
1031 static ssize_t lazystatfs_store(struct kobject *kobj,
1032                                 struct attribute *attr,
1033                                 const char *buffer,
1034                                 size_t count)
1035 {
1036         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1037                                               ll_kset.kobj);
1038         bool val;
1039         int rc;
1040
1041         rc = kstrtobool(buffer, &val);
1042         if (rc)
1043                 return rc;
1044
1045         if (val)
1046                 set_bit(LL_SBI_LAZYSTATFS, sbi->ll_flags);
1047         else
1048                 clear_bit(LL_SBI_LAZYSTATFS, sbi->ll_flags);
1049
1050         return count;
1051 }
1052 LUSTRE_RW_ATTR(lazystatfs);
1053
1054 static ssize_t statfs_max_age_show(struct kobject *kobj, struct attribute *attr,
1055                                    char *buf)
1056 {
1057         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1058                                               ll_kset.kobj);
1059
1060         return scnprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_statfs_max_age);
1061 }
1062
1063 static ssize_t statfs_max_age_store(struct kobject *kobj,
1064                                     struct attribute *attr, const char *buffer,
1065                                     size_t count)
1066 {
1067         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1068                                               ll_kset.kobj);
1069         unsigned int val;
1070         int rc;
1071
1072         rc = kstrtouint(buffer, 10, &val);
1073         if (rc)
1074                 return rc;
1075         if (val > OBD_STATFS_CACHE_MAX_AGE)
1076                 return -EINVAL;
1077
1078         sbi->ll_statfs_max_age = val;
1079
1080         return count;
1081 }
1082 LUSTRE_RW_ATTR(statfs_max_age);
1083
1084 static ssize_t max_easize_show(struct kobject *kobj,
1085                                struct attribute *attr,
1086                                char *buf)
1087 {
1088         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1089                                               ll_kset.kobj);
1090         unsigned int ealen;
1091         int rc;
1092
1093         rc = ll_get_max_mdsize(sbi, &ealen);
1094         if (rc)
1095                 return rc;
1096
1097         /* Limit xattr size returned to userspace based on kernel maximum */
1098         return scnprintf(buf, PAGE_SIZE, "%u\n",
1099                          ealen > XATTR_SIZE_MAX ? XATTR_SIZE_MAX : ealen);
1100 }
1101 LUSTRE_RO_ATTR(max_easize);
1102
1103 /**
1104  * Get default_easize.
1105  *
1106  * \see client_obd::cl_default_mds_easize
1107  *
1108  * \param[in] m         seq_file handle
1109  * \param[in] v         unused for single entry
1110  *
1111  * \retval 0            on success
1112  * \retval negative     negated errno on failure
1113  */
1114 static ssize_t default_easize_show(struct kobject *kobj,
1115                                    struct attribute *attr,
1116                                    char *buf)
1117 {
1118         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1119                                               ll_kset.kobj);
1120         unsigned int ealen;
1121         int rc;
1122
1123         rc = ll_get_default_mdsize(sbi, &ealen);
1124         if (rc)
1125                 return rc;
1126
1127         /* Limit xattr size returned to userspace based on kernel maximum */
1128         return scnprintf(buf, PAGE_SIZE, "%u\n",
1129                          ealen > XATTR_SIZE_MAX ? XATTR_SIZE_MAX : ealen);
1130 }
1131
1132 /**
1133  * Set default_easize.
1134  *
1135  * Range checking on the passed value is handled by
1136  * ll_set_default_mdsize().
1137  *
1138  * \see client_obd::cl_default_mds_easize
1139  *
1140  * \param[in] file      proc file
1141  * \param[in] buffer    string passed from user space
1142  * \param[in] count     \a buffer length
1143  * \param[in] off       unused for single entry
1144  *
1145  * \retval positive     \a count on success
1146  * \retval negative     negated errno on failure
1147  */
1148 static ssize_t default_easize_store(struct kobject *kobj,
1149                                     struct attribute *attr,
1150                                     const char *buffer,
1151                                     size_t count)
1152 {
1153         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1154                                               ll_kset.kobj);
1155         unsigned int val;
1156         int rc;
1157
1158         if (count == 0)
1159                 return 0;
1160
1161         rc = kstrtouint(buffer, 10, &val);
1162         if (rc)
1163                 return rc;
1164
1165         rc = ll_set_default_mdsize(sbi, val);
1166         if (rc)
1167                 return rc;
1168
1169         return count;
1170 }
1171 LUSTRE_RW_ATTR(default_easize);
1172
1173 LDEBUGFS_SEQ_FOPS_RO(ll_sbi_flags);
1174
1175 static ssize_t xattr_cache_show(struct kobject *kobj,
1176                                 struct attribute *attr,
1177                                 char *buf)
1178 {
1179         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1180                                               ll_kset.kobj);
1181
1182         return sprintf(buf, "%u\n", sbi->ll_xattr_cache_enabled);
1183 }
1184
1185 static ssize_t xattr_cache_store(struct kobject *kobj,
1186                                  struct attribute *attr,
1187                                  const char *buffer,
1188                                  size_t count)
1189 {
1190         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1191                                               ll_kset.kobj);
1192         bool val;
1193         int rc;
1194
1195         rc = kstrtobool(buffer, &val);
1196         if (rc)
1197                 return rc;
1198
1199         if (val && !test_bit(LL_SBI_XATTR_CACHE, sbi->ll_flags))
1200                 return -EOPNOTSUPP;
1201
1202         sbi->ll_xattr_cache_enabled = val;
1203         sbi->ll_xattr_cache_set = 1;
1204
1205         return count;
1206 }
1207 LUSTRE_RW_ATTR(xattr_cache);
1208
1209 static ssize_t tiny_write_show(struct kobject *kobj,
1210                                struct attribute *attr,
1211                                char *buf)
1212 {
1213         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1214                                               ll_kset.kobj);
1215
1216         return scnprintf(buf, PAGE_SIZE, "%u\n",
1217                          test_bit(LL_SBI_TINY_WRITE, sbi->ll_flags));
1218 }
1219
1220 static ssize_t tiny_write_store(struct kobject *kobj,
1221                                 struct attribute *attr,
1222                                 const char *buffer,
1223                                 size_t count)
1224 {
1225         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1226                                               ll_kset.kobj);
1227         bool val;
1228         int rc;
1229
1230         rc = kstrtobool(buffer, &val);
1231         if (rc)
1232                 return rc;
1233
1234         spin_lock(&sbi->ll_lock);
1235         if (val)
1236                 set_bit(LL_SBI_TINY_WRITE, sbi->ll_flags);
1237         else
1238                 clear_bit(LL_SBI_TINY_WRITE, sbi->ll_flags);
1239         spin_unlock(&sbi->ll_lock);
1240
1241         return count;
1242 }
1243 LUSTRE_RW_ATTR(tiny_write);
1244
1245 static ssize_t unaligned_dio_show(struct kobject *kobj,
1246                                   struct attribute *attr,
1247                                   char *buf)
1248 {
1249         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1250                                               ll_kset.kobj);
1251
1252         return scnprintf(buf, PAGE_SIZE, "%u\n",
1253                          test_bit(LL_SBI_UNALIGNED_DIO, sbi->ll_flags));
1254 }
1255
1256 static ssize_t unaligned_dio_store(struct kobject *kobj,
1257                                    struct attribute *attr,
1258                                    const char *buffer,
1259                                    size_t count)
1260 {
1261         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1262                                               ll_kset.kobj);
1263         bool val;
1264         int rc;
1265
1266         rc = kstrtobool(buffer, &val);
1267         if (rc)
1268                 return rc;
1269
1270         spin_lock(&sbi->ll_lock);
1271         if (val)
1272                 set_bit(LL_SBI_UNALIGNED_DIO, sbi->ll_flags);
1273         else
1274                 clear_bit(LL_SBI_UNALIGNED_DIO, sbi->ll_flags);
1275         spin_unlock(&sbi->ll_lock);
1276
1277         return count;
1278 }
1279 LUSTRE_RW_ATTR(unaligned_dio);
1280
1281 static ssize_t parallel_dio_show(struct kobject *kobj,
1282                                  struct attribute *attr,
1283                                  char *buf)
1284 {
1285         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1286                                               ll_kset.kobj);
1287
1288         return snprintf(buf, PAGE_SIZE, "%u\n",
1289                         test_bit(LL_SBI_PARALLEL_DIO, sbi->ll_flags));
1290 }
1291
1292 static ssize_t parallel_dio_store(struct kobject *kobj,
1293                                   struct attribute *attr,
1294                                   const char *buffer,
1295                                   size_t count)
1296 {
1297         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1298                                               ll_kset.kobj);
1299         bool val;
1300         int rc;
1301
1302         rc = kstrtobool(buffer, &val);
1303         if (rc)
1304                 return rc;
1305
1306         spin_lock(&sbi->ll_lock);
1307         if (val)
1308                 set_bit(LL_SBI_PARALLEL_DIO, sbi->ll_flags);
1309         else
1310                 clear_bit(LL_SBI_PARALLEL_DIO, sbi->ll_flags);
1311         spin_unlock(&sbi->ll_lock);
1312
1313         return count;
1314 }
1315 LUSTRE_RW_ATTR(parallel_dio);
1316
1317 static ssize_t max_read_ahead_async_active_show(struct kobject *kobj,
1318                                                struct attribute *attr,
1319                                                char *buf)
1320 {
1321         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1322                                               ll_kset.kobj);
1323
1324         return scnprintf(buf, PAGE_SIZE, "%u\n",
1325                          sbi->ll_ra_info.ra_async_max_active);
1326 }
1327
1328 static ssize_t max_read_ahead_async_active_store(struct kobject *kobj,
1329                                                  struct attribute *attr,
1330                                                  const char *buffer,
1331                                                  size_t count)
1332 {
1333         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1334                                               ll_kset.kobj);
1335         unsigned int val;
1336         int rc;
1337
1338         rc = kstrtouint(buffer, 10, &val);
1339         if (rc)
1340                 return rc;
1341
1342         /**
1343          * It doesn't make any sense to make it exceed what
1344          * workqueue could acutally support. This can easily
1345          * over subscripe the cores but Lustre internally
1346          * throttles to avoid those impacts.
1347          */
1348         if (val > WQ_UNBOUND_MAX_ACTIVE) {
1349                 CERROR("%s: cannot set max_read_ahead_async_active=%u larger than %u\n",
1350                        sbi->ll_fsname, val, WQ_UNBOUND_MAX_ACTIVE);
1351                 return -ERANGE;
1352         }
1353
1354         spin_lock(&sbi->ll_lock);
1355         sbi->ll_ra_info.ra_async_max_active = val;
1356         spin_unlock(&sbi->ll_lock);
1357
1358         return count;
1359 }
1360 LUSTRE_RW_ATTR(max_read_ahead_async_active);
1361
1362 static ssize_t read_ahead_async_file_threshold_mb_show(struct kobject *kobj,
1363                                                        struct attribute *attr,
1364                                                        char *buf)
1365 {
1366         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1367                                               ll_kset.kobj);
1368
1369         return scnprintf(buf, PAGE_SIZE, "%lu\n", PAGES_TO_MiB(
1370                          sbi->ll_ra_info.ra_async_pages_per_file_threshold));
1371 }
1372
1373 static ssize_t
1374 read_ahead_async_file_threshold_mb_store(struct kobject *kobj,
1375                                          struct attribute *attr,
1376                                          const char *buffer, size_t count)
1377 {
1378         unsigned long pages_number;
1379         unsigned long max_ra_per_file;
1380         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1381                                               ll_kset.kobj);
1382         int rc;
1383
1384         rc = kstrtoul(buffer, 10, &pages_number);
1385         if (rc)
1386                 return rc;
1387
1388         pages_number = MiB_TO_PAGES(pages_number);
1389         max_ra_per_file = sbi->ll_ra_info.ra_max_pages_per_file;
1390         if (pages_number < 0 || pages_number > max_ra_per_file) {
1391                 CERROR("%s: can't set read_ahead_async_file_threshold_mb=%lu > "
1392                        "max_read_readahead_per_file_mb=%lu\n", sbi->ll_fsname,
1393                        PAGES_TO_MiB(pages_number),
1394                        PAGES_TO_MiB(max_ra_per_file));
1395                 return -ERANGE;
1396         }
1397         sbi->ll_ra_info.ra_async_pages_per_file_threshold = pages_number;
1398
1399         return count;
1400 }
1401 LUSTRE_RW_ATTR(read_ahead_async_file_threshold_mb);
1402
1403 static ssize_t read_ahead_range_kb_show(struct kobject *kobj,
1404                                         struct attribute *attr,char *buf)
1405 {
1406         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1407                                               ll_kset.kobj);
1408
1409         return snprintf(buf, PAGE_SIZE, "%lu\n",
1410                         sbi->ll_ra_info.ra_range_pages << (PAGE_SHIFT - 10));
1411 }
1412
1413 static ssize_t
1414 read_ahead_range_kb_store(struct kobject *kobj,
1415                                struct attribute *attr,
1416                                const char *buffer, size_t count)
1417 {
1418         unsigned long pages_number;
1419         unsigned long max_ra_per_file;
1420         u64 val;
1421         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1422                                               ll_kset.kobj);
1423         int rc;
1424
1425         rc = sysfs_memparse(buffer, count, &val, "KiB");
1426         if (rc < 0)
1427                 return rc;
1428
1429         pages_number = val >> PAGE_SHIFT;
1430         /* Disable mmap range read */
1431         if (pages_number == 0)
1432                 goto out;
1433
1434         max_ra_per_file = sbi->ll_ra_info.ra_max_pages_per_file;
1435         if (pages_number > max_ra_per_file ||
1436             pages_number < RA_MIN_MMAP_RANGE_PAGES)
1437                 return -ERANGE;
1438
1439 out:
1440         spin_lock(&sbi->ll_lock);
1441         sbi->ll_ra_info.ra_range_pages = pages_number;
1442         spin_unlock(&sbi->ll_lock);
1443
1444         return count;
1445 }
1446 LUSTRE_RW_ATTR(read_ahead_range_kb);
1447
1448 static ssize_t fast_read_show(struct kobject *kobj,
1449                               struct attribute *attr,
1450                               char *buf)
1451 {
1452         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1453                                               ll_kset.kobj);
1454
1455         return scnprintf(buf, PAGE_SIZE, "%u\n",
1456                          test_bit(LL_SBI_FAST_READ, sbi->ll_flags));
1457 }
1458
1459 static ssize_t fast_read_store(struct kobject *kobj,
1460                                struct attribute *attr,
1461                                const char *buffer,
1462                                size_t count)
1463 {
1464         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1465                                               ll_kset.kobj);
1466         bool val;
1467         int rc;
1468
1469         rc = kstrtobool(buffer, &val);
1470         if (rc)
1471                 return rc;
1472
1473         spin_lock(&sbi->ll_lock);
1474         if (val)
1475                 set_bit(LL_SBI_FAST_READ, sbi->ll_flags);
1476         else
1477                 clear_bit(LL_SBI_FAST_READ, sbi->ll_flags);
1478         spin_unlock(&sbi->ll_lock);
1479
1480         return count;
1481 }
1482 LUSTRE_RW_ATTR(fast_read);
1483
1484 static ssize_t file_heat_show(struct kobject *kobj,
1485                               struct attribute *attr,
1486                               char *buf)
1487 {
1488         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1489                                               ll_kset.kobj);
1490
1491         return scnprintf(buf, PAGE_SIZE, "%u\n",
1492                          test_bit(LL_SBI_FILE_HEAT, sbi->ll_flags));
1493 }
1494
1495 static ssize_t file_heat_store(struct kobject *kobj,
1496                                struct attribute *attr,
1497                                const char *buffer,
1498                                size_t count)
1499 {
1500         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1501                                               ll_kset.kobj);
1502         bool val;
1503         int rc;
1504
1505         rc = kstrtobool(buffer, &val);
1506         if (rc)
1507                 return rc;
1508
1509         spin_lock(&sbi->ll_lock);
1510         if (val)
1511                 set_bit(LL_SBI_FILE_HEAT, sbi->ll_flags);
1512         else
1513                 clear_bit(LL_SBI_FILE_HEAT, sbi->ll_flags);
1514         spin_unlock(&sbi->ll_lock);
1515
1516         return count;
1517 }
1518 LUSTRE_RW_ATTR(file_heat);
1519
1520 static ssize_t heat_decay_percentage_show(struct kobject *kobj,
1521                                           struct attribute *attr,
1522                                           char *buf)
1523 {
1524         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1525                                               ll_kset.kobj);
1526
1527         return scnprintf(buf, PAGE_SIZE, "%u\n",
1528                          (sbi->ll_heat_decay_weight * 100 + 128) / 256);
1529 }
1530
1531 static ssize_t heat_decay_percentage_store(struct kobject *kobj,
1532                                            struct attribute *attr,
1533                                            const char *buffer,
1534                                            size_t count)
1535 {
1536         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1537                                               ll_kset.kobj);
1538         unsigned long val;
1539         int rc;
1540
1541         rc = kstrtoul(buffer, 10, &val);
1542         if (rc)
1543                 return rc;
1544
1545         if (val < 0 || val > 100)
1546                 return -ERANGE;
1547
1548         sbi->ll_heat_decay_weight = (val * 256 + 50) / 100;
1549
1550         return count;
1551 }
1552 LUSTRE_RW_ATTR(heat_decay_percentage);
1553
1554 static ssize_t heat_period_second_show(struct kobject *kobj,
1555                                        struct attribute *attr,
1556                                        char *buf)
1557 {
1558         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1559                                               ll_kset.kobj);
1560
1561         return scnprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_heat_period_second);
1562 }
1563
1564 static ssize_t heat_period_second_store(struct kobject *kobj,
1565                                         struct attribute *attr,
1566                                         const char *buffer,
1567                                         size_t count)
1568 {
1569         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1570                                               ll_kset.kobj);
1571         unsigned long val;
1572         int rc;
1573
1574         rc = kstrtoul(buffer, 10, &val);
1575         if (rc)
1576                 return rc;
1577
1578         if (val <= 0)
1579                 return -ERANGE;
1580
1581         sbi->ll_heat_period_second = val;
1582
1583         return count;
1584 }
1585 LUSTRE_RW_ATTR(heat_period_second);
1586
1587 static ssize_t opencache_threshold_count_show(struct kobject *kobj,
1588                                               struct attribute *attr,
1589                                               char *buf)
1590 {
1591         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1592                                               ll_kset.kobj);
1593
1594         if (sbi->ll_oc_thrsh_count)
1595                 return snprintf(buf, PAGE_SIZE, "%u\n",
1596                                 sbi->ll_oc_thrsh_count);
1597         else
1598                 return snprintf(buf, PAGE_SIZE, "off\n");
1599 }
1600
1601 static ssize_t opencache_threshold_count_store(struct kobject *kobj,
1602                                                struct attribute *attr,
1603                                                const char *buffer,
1604                                                size_t count)
1605 {
1606         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1607                                               ll_kset.kobj);
1608         unsigned int val;
1609         int rc;
1610
1611         rc = kstrtouint(buffer, 10, &val);
1612         if (rc) {
1613                 bool enable;
1614                 /* also accept "off" to disable and "on" to always cache */
1615                 rc = kstrtobool(buffer, &enable);
1616                 if (rc)
1617                         return rc;
1618                 val = enable;
1619         }
1620         sbi->ll_oc_thrsh_count = val;
1621
1622         return count;
1623 }
1624 LUSTRE_RW_ATTR(opencache_threshold_count);
1625
1626 static ssize_t opencache_threshold_ms_show(struct kobject *kobj,
1627                                            struct attribute *attr,
1628                                            char *buf)
1629 {
1630         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1631                                               ll_kset.kobj);
1632
1633         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_oc_thrsh_ms);
1634 }
1635
1636 static ssize_t opencache_threshold_ms_store(struct kobject *kobj,
1637                                             struct attribute *attr,
1638                                             const char *buffer,
1639                                             size_t count)
1640 {
1641         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1642                                               ll_kset.kobj);
1643         unsigned int val;
1644         int rc;
1645
1646         rc = kstrtouint(buffer, 10, &val);
1647         if (rc)
1648                 return rc;
1649
1650         sbi->ll_oc_thrsh_ms = val;
1651
1652         return count;
1653 }
1654 LUSTRE_RW_ATTR(opencache_threshold_ms);
1655
1656 static ssize_t opencache_max_ms_show(struct kobject *kobj,
1657                                      struct attribute *attr,
1658                                      char *buf)
1659 {
1660         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1661                                               ll_kset.kobj);
1662
1663         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_oc_max_ms);
1664 }
1665
1666 static ssize_t opencache_max_ms_store(struct kobject *kobj,
1667                                       struct attribute *attr,
1668                                       const char *buffer,
1669                                       size_t count)
1670 {
1671         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1672                                               ll_kset.kobj);
1673         unsigned int val;
1674         int rc;
1675
1676         rc = kstrtouint(buffer, 10, &val);
1677         if (rc)
1678                 return rc;
1679
1680         sbi->ll_oc_max_ms = val;
1681
1682         return count;
1683 }
1684 LUSTRE_RW_ATTR(opencache_max_ms);
1685
1686 static ssize_t inode_cache_show(struct kobject *kobj,
1687                                 struct attribute *attr,
1688                                 char *buf)
1689 {
1690         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1691                                               ll_kset.kobj);
1692
1693         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_inode_cache_enabled);
1694 }
1695
1696 static ssize_t inode_cache_store(struct kobject *kobj,
1697                                  struct attribute *attr,
1698                                  const char *buffer,
1699                                  size_t count)
1700 {
1701         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1702                                               ll_kset.kobj);
1703         bool val;
1704         int rc;
1705
1706         rc = kstrtobool(buffer, &val);
1707         if (rc)
1708                 return rc;
1709
1710         sbi->ll_inode_cache_enabled = val;
1711
1712         return count;
1713 }
1714 LUSTRE_RW_ATTR(inode_cache);
1715
1716 static int ll_unstable_stats_seq_show(struct seq_file *m, void *v)
1717 {
1718         struct super_block      *sb    = m->private;
1719         struct ll_sb_info       *sbi   = ll_s2sbi(sb);
1720         struct cl_client_cache  *cache = sbi->ll_cache;
1721         long pages;
1722         int mb;
1723
1724         pages = atomic_long_read(&cache->ccc_unstable_nr);
1725         mb    = (pages * PAGE_SIZE) >> 20;
1726
1727         seq_printf(m, "unstable_check:     %8d\n"
1728                       "unstable_pages: %12ld\n"
1729                       "unstable_mb:        %8d\n",
1730                    cache->ccc_unstable_check, pages, mb);
1731         return 0;
1732 }
1733
1734 static ssize_t ll_unstable_stats_seq_write(struct file *file,
1735                                            const char __user *buffer,
1736                                            size_t count, loff_t *unused)
1737 {
1738         struct seq_file *seq = file->private_data;
1739         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)seq->private);
1740         char kernbuf[128];
1741         bool val;
1742         int rc;
1743
1744         if (count == 0)
1745                 return 0;
1746         if (count >= sizeof(kernbuf))
1747                 return -EINVAL;
1748
1749         if (copy_from_user(kernbuf, buffer, count))
1750                 return -EFAULT;
1751         kernbuf[count] = 0;
1752
1753         buffer += lprocfs_find_named_value(kernbuf, "unstable_check:", &count) -
1754                   kernbuf;
1755         rc = kstrtobool_from_user(buffer, count, &val);
1756         if (rc < 0)
1757                 return rc;
1758
1759         /* borrow lru lock to set the value */
1760         spin_lock(&sbi->ll_cache->ccc_lru_lock);
1761         sbi->ll_cache->ccc_unstable_check = val;
1762         spin_unlock(&sbi->ll_cache->ccc_lru_lock);
1763
1764         return count;
1765 }
1766
1767 LDEBUGFS_SEQ_FOPS(ll_unstable_stats);
1768
1769 static int ll_root_squash_seq_show(struct seq_file *m, void *v)
1770 {
1771         struct super_block *sb = m->private;
1772         struct ll_sb_info *sbi = ll_s2sbi(sb);
1773         struct root_squash_info *squash = &sbi->ll_squash;
1774
1775         seq_printf(m, "%u:%u\n", squash->rsi_uid, squash->rsi_gid);
1776         return 0;
1777 }
1778
1779 static ssize_t ll_root_squash_seq_write(struct file *file,
1780                                         const char __user *buffer,
1781                                         size_t count, loff_t *off)
1782 {
1783         struct seq_file *m = file->private_data;
1784         struct super_block *sb = m->private;
1785         struct ll_sb_info *sbi = ll_s2sbi(sb);
1786         struct root_squash_info *squash = &sbi->ll_squash;
1787
1788         return lprocfs_wr_root_squash(buffer, count, squash, sbi->ll_fsname);
1789 }
1790
1791 LDEBUGFS_SEQ_FOPS(ll_root_squash);
1792
1793 static int ll_nosquash_nids_seq_show(struct seq_file *m, void *v)
1794 {
1795         struct super_block *sb = m->private;
1796         struct ll_sb_info *sbi = ll_s2sbi(sb);
1797         struct root_squash_info *squash = &sbi->ll_squash;
1798         int len;
1799
1800         spin_lock(&squash->rsi_lock);
1801         if (!list_empty(&squash->rsi_nosquash_nids)) {
1802                 len = cfs_print_nidlist(m->buf + m->count, m->size - m->count,
1803                                         &squash->rsi_nosquash_nids);
1804                 m->count += len;
1805                 seq_putc(m, '\n');
1806         } else {
1807                 seq_puts(m, "NONE\n");
1808         }
1809         spin_unlock(&squash->rsi_lock);
1810
1811         return 0;
1812 }
1813
1814 static ssize_t ll_nosquash_nids_seq_write(struct file *file,
1815                                           const char __user *buffer,
1816                                           size_t count, loff_t *off)
1817 {
1818         struct seq_file *m = file->private_data;
1819         struct super_block *sb = m->private;
1820         struct ll_sb_info *sbi = ll_s2sbi(sb);
1821         struct root_squash_info *squash = &sbi->ll_squash;
1822         int rc;
1823
1824         rc = lprocfs_wr_nosquash_nids(buffer, count, squash, sbi->ll_fsname);
1825         if (rc < 0)
1826                 return rc;
1827
1828         ll_compute_rootsquash_state(sbi);
1829
1830         return rc;
1831 }
1832
1833 LDEBUGFS_SEQ_FOPS(ll_nosquash_nids);
1834
1835 #if defined(CONFIG_LL_ENCRYPTION)
1836 static ssize_t enable_filename_encryption_show(struct kobject *kobj,
1837                                                struct attribute *attr,
1838                                                char *buffer)
1839 {
1840         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1841                                               ll_kset.kobj);
1842         struct lustre_sb_info *lsi = sbi->lsi;
1843
1844         return snprintf(buffer, PAGE_SIZE,  "%u\n",
1845                         lsi->lsi_flags & LSI_FILENAME_ENC ? 1 : 0);
1846 }
1847
1848 static ssize_t enable_filename_encryption_store(struct kobject *kobj,
1849                                                 struct attribute *attr,
1850                                                 const char *buffer,
1851                                                 size_t count)
1852 {
1853         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1854                                               ll_kset.kobj);
1855         struct lustre_sb_info *lsi = sbi->lsi;
1856         bool val;
1857         int rc;
1858
1859         rc = kstrtobool(buffer, &val);
1860         if (rc)
1861                 return rc;
1862
1863         if (val) {
1864                 if (!ll_sbi_has_name_encrypt(sbi)) {
1865                         /* server does not support name encryption,
1866                          * so force it to NULL on client
1867                          */
1868                         CDEBUG(D_SEC, "%s: server does not support name encryption\n",
1869                                sbi->ll_fsname);
1870                         lsi->lsi_flags &= ~LSI_FILENAME_ENC;
1871                         return -EOPNOTSUPP;
1872                 }
1873
1874                 lsi->lsi_flags |= LSI_FILENAME_ENC;
1875         } else {
1876                 lsi->lsi_flags &= ~LSI_FILENAME_ENC;
1877         }
1878
1879         return count;
1880 }
1881
1882 LUSTRE_RW_ATTR(enable_filename_encryption);
1883 #endif /* CONFIG_LL_ENCRYPTION */
1884
1885 #if defined(CONFIG_LL_ENCRYPTION) || defined(HAVE_LUSTRE_CRYPTO)
1886 static ssize_t filename_enc_use_old_base64_show(struct kobject *kobj,
1887                                                 struct attribute *attr,
1888                                                 char *buffer)
1889 {
1890         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1891                                               ll_kset.kobj);
1892         struct lustre_sb_info *lsi = sbi->lsi;
1893
1894         return snprintf(buffer, PAGE_SIZE, "%u\n",
1895                         lsi->lsi_flags & LSI_FILENAME_ENC_B64_OLD_CLI ? 1 : 0);
1896 }
1897
1898 static ssize_t filename_enc_use_old_base64_store(struct kobject *kobj,
1899                                                  struct attribute *attr,
1900                                                  const char *buffer,
1901                                                  size_t count)
1902 {
1903         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1904                                               ll_kset.kobj);
1905         struct lustre_sb_info *lsi = sbi->lsi;
1906         bool val;
1907         int rc;
1908
1909         rc = kstrtobool(buffer, &val);
1910         if (rc)
1911                 return rc;
1912
1913         if (val) {
1914                 if (!ll_sbi_has_name_encrypt(sbi)) {
1915                         /* server does not support name encryption,
1916                          * so force it to NULL on client
1917                          */
1918                         CDEBUG(D_SEC,
1919                                "%s: server does not support name encryption\n",
1920                                sbi->ll_fsname);
1921                         lsi->lsi_flags &= ~LSI_FILENAME_ENC_B64_OLD_CLI;
1922                         return -EOPNOTSUPP;
1923                 }
1924
1925                 lsi->lsi_flags |= LSI_FILENAME_ENC_B64_OLD_CLI;
1926         } else {
1927                 lsi->lsi_flags &= ~LSI_FILENAME_ENC_B64_OLD_CLI;
1928         }
1929
1930         return count;
1931 }
1932
1933 LUSTRE_RW_ATTR(filename_enc_use_old_base64);
1934 #endif /* CONFIG_LL_ENCRYPTION || HAVE_LUSTRE_CRYPTO */
1935
1936 static int ll_pcc_seq_show(struct seq_file *m, void *v)
1937 {
1938         struct super_block *sb = m->private;
1939         struct ll_sb_info *sbi = ll_s2sbi(sb);
1940
1941         return pcc_super_dump(&sbi->ll_pcc_super, m);
1942 }
1943
1944 static ssize_t ll_pcc_seq_write(struct file *file, const char __user *buffer,
1945                                 size_t count, loff_t *off)
1946 {
1947         struct seq_file *m = file->private_data;
1948         struct super_block *sb = m->private;
1949         struct ll_sb_info *sbi = ll_s2sbi(sb);
1950         int rc;
1951         char *kernbuf;
1952
1953         if (count >= LPROCFS_WR_PCC_MAX_CMD)
1954                 return -EINVAL;
1955
1956         if (!(exp_connect_flags2(sbi->ll_md_exp) & OBD_CONNECT2_PCC))
1957                 return -EOPNOTSUPP;
1958
1959         OBD_ALLOC(kernbuf, count + 1);
1960         if (kernbuf == NULL)
1961                 return -ENOMEM;
1962
1963         if (copy_from_user(kernbuf, buffer, count))
1964                 GOTO(out_free_kernbuff, rc = -EFAULT);
1965
1966         rc = pcc_cmd_handle(kernbuf, count, &sbi->ll_pcc_super);
1967 out_free_kernbuff:
1968         OBD_FREE(kernbuf, count + 1);
1969         return rc ? rc : count;
1970 }
1971 LDEBUGFS_SEQ_FOPS(ll_pcc);
1972
1973 struct ldebugfs_vars lprocfs_llite_obd_vars[] = {
1974         { .name =       "site",
1975           .fops =       &ll_site_stats_fops                     },
1976         { .name =       "max_cached_mb",
1977           .fops =       &ll_max_cached_mb_fops                  },
1978         { .name =       "statahead_stats",
1979           .fops =       &ll_statahead_stats_fops                },
1980         { .name =       "unstable_stats",
1981           .fops =       &ll_unstable_stats_fops                 },
1982         { .name =       "sbi_flags",
1983           .fops =       &ll_sbi_flags_fops                      },
1984         { .name =       "root_squash",
1985           .fops =       &ll_root_squash_fops                    },
1986         { .name =       "nosquash_nids",
1987           .fops =       &ll_nosquash_nids_fops                  },
1988         { .name =       "pcc",
1989           .fops =       &ll_pcc_fops,                           },
1990         { NULL }
1991 };
1992
1993 #define MAX_STRING_SIZE 128
1994
1995 static struct attribute *llite_attrs[] = {
1996         &lustre_attr_blocksize.attr,
1997         &lustre_attr_stat_blocksize.attr,
1998         &lustre_attr_kbytestotal.attr,
1999         &lustre_attr_kbytesfree.attr,
2000         &lustre_attr_kbytesavail.attr,
2001         &lustre_attr_filestotal.attr,
2002         &lustre_attr_filesfree.attr,
2003         &lustre_attr_client_type.attr,
2004         &lustre_attr_foreign_symlink_enable.attr,
2005         &lustre_attr_foreign_symlink_prefix.attr,
2006         &lustre_attr_foreign_symlink_upcall.attr,
2007         &lustre_attr_foreign_symlink_upcall_info.attr,
2008         &lustre_attr_fstype.attr,
2009         &lustre_attr_uuid.attr,
2010         &lustre_attr_checksums.attr,
2011         &lustre_attr_checksum_pages.attr,
2012         &lustre_attr_max_read_ahead_mb.attr,
2013         &lustre_attr_max_read_ahead_per_file_mb.attr,
2014         &lustre_attr_max_read_ahead_whole_mb.attr,
2015         &lustre_attr_max_read_ahead_async_active.attr,
2016         &lustre_attr_read_ahead_async_file_threshold_mb.attr,
2017         &lustre_attr_read_ahead_range_kb.attr,
2018         &lustre_attr_stats_track_pid.attr,
2019         &lustre_attr_stats_track_ppid.attr,
2020         &lustre_attr_stats_track_gid.attr,
2021         &lustre_attr_enable_statahead_fname.attr,
2022         &lustre_attr_statahead_running_max.attr,
2023         &lustre_attr_statahead_batch_max.attr,
2024         &lustre_attr_statahead_max.attr,
2025         &lustre_attr_statahead_min.attr,
2026         &lustre_attr_statahead_timeout.attr,
2027         &lustre_attr_statahead_agl.attr,
2028         &lustre_attr_lazystatfs.attr,
2029         &lustre_attr_statfs_max_age.attr,
2030         &lustre_attr_max_easize.attr,
2031         &lustre_attr_default_easize.attr,
2032         &lustre_attr_xattr_cache.attr,
2033         &lustre_attr_fast_read.attr,
2034         &lustre_attr_tiny_write.attr,
2035         &lustre_attr_parallel_dio.attr,
2036         &lustre_attr_unaligned_dio.attr,
2037         &lustre_attr_file_heat.attr,
2038         &lustre_attr_heat_decay_percentage.attr,
2039         &lustre_attr_heat_period_second.attr,
2040         &lustre_attr_opencache_threshold_count.attr,
2041         &lustre_attr_opencache_threshold_ms.attr,
2042         &lustre_attr_opencache_max_ms.attr,
2043         &lustre_attr_inode_cache.attr,
2044 #ifdef CONFIG_LL_ENCRYPTION
2045         &lustre_attr_enable_filename_encryption.attr,
2046 #endif
2047 #if defined(CONFIG_LL_ENCRYPTION) || defined(HAVE_LUSTRE_CRYPTO)
2048         &lustre_attr_filename_enc_use_old_base64.attr,
2049 #endif
2050         NULL,
2051 };
2052
2053 KOBJ_ATTRIBUTE_GROUPS(llite); /* creates llite_groups */
2054
2055 static void sbi_kobj_release(struct kobject *kobj)
2056 {
2057         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
2058                                               ll_kset.kobj);
2059         complete(&sbi->ll_kobj_unregister);
2060 }
2061
2062 static struct kobj_type sbi_ktype = {
2063         .default_groups = KOBJ_ATTR_GROUPS(llite),
2064         .sysfs_ops      = &lustre_sysfs_ops,
2065         .release        = sbi_kobj_release,
2066 };
2067
2068 static const struct llite_file_opcode {
2069         __u32                           lfo_opcode;
2070         enum lprocfs_counter_config     lfo_config;
2071         const char                      *lfo_opname;
2072 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
2073         /* file operation */
2074         { LPROC_LL_READ_BYTES,  LPROCFS_TYPE_BYTES_FULL, "read_bytes" },
2075         { LPROC_LL_WRITE_BYTES, LPROCFS_TYPE_BYTES_FULL, "write_bytes" },
2076         { LPROC_LL_READ,        LPROCFS_TYPE_LATENCY,   "read" },
2077         { LPROC_LL_WRITE,       LPROCFS_TYPE_LATENCY,   "write" },
2078         { LPROC_LL_IOCTL,       LPROCFS_TYPE_REQS,      "ioctl" },
2079         { LPROC_LL_OPEN,        LPROCFS_TYPE_LATENCY,   "open" },
2080         { LPROC_LL_RELEASE,     LPROCFS_TYPE_LATENCY,   "close" },
2081         { LPROC_LL_MMAP,        LPROCFS_TYPE_LATENCY,   "mmap" },
2082         { LPROC_LL_FAULT,       LPROCFS_TYPE_LATENCY,   "page_fault" },
2083         { LPROC_LL_MKWRITE,     LPROCFS_TYPE_LATENCY,   "page_mkwrite" },
2084         { LPROC_LL_LLSEEK,      LPROCFS_TYPE_LATENCY,   "seek" },
2085         { LPROC_LL_FSYNC,       LPROCFS_TYPE_LATENCY,   "fsync" },
2086         { LPROC_LL_READDIR,     LPROCFS_TYPE_LATENCY,   "readdir" },
2087         { LPROC_LL_INODE_OCOUNT, LPROCFS_TYPE_REQS | LPROCFS_CNTR_AVGMINMAX |
2088                                 LPROCFS_CNTR_STDDEV,    "opencount" },
2089         { LPROC_LL_INODE_OPCLTM,LPROCFS_TYPE_LATENCY,   "openclosetime" },
2090         /* inode operation */
2091         { LPROC_LL_SETATTR,     LPROCFS_TYPE_LATENCY,   "setattr" },
2092         { LPROC_LL_TRUNC,       LPROCFS_TYPE_LATENCY,   "truncate" },
2093         { LPROC_LL_FLOCK,       LPROCFS_TYPE_LATENCY,   "flock" },
2094         { LPROC_LL_GETATTR,     LPROCFS_TYPE_LATENCY,   "getattr" },
2095         { LPROC_LL_FALLOCATE,   LPROCFS_TYPE_LATENCY,   "fallocate"},
2096         /* dir inode operation */
2097         { LPROC_LL_CREATE,      LPROCFS_TYPE_LATENCY,   "create" },
2098         { LPROC_LL_LINK,        LPROCFS_TYPE_LATENCY,   "link" },
2099         { LPROC_LL_UNLINK,      LPROCFS_TYPE_LATENCY,   "unlink" },
2100         { LPROC_LL_SYMLINK,     LPROCFS_TYPE_LATENCY,   "symlink" },
2101         { LPROC_LL_MKDIR,       LPROCFS_TYPE_LATENCY,   "mkdir" },
2102         { LPROC_LL_RMDIR,       LPROCFS_TYPE_LATENCY,   "rmdir" },
2103         { LPROC_LL_MKNOD,       LPROCFS_TYPE_LATENCY,   "mknod" },
2104         { LPROC_LL_RENAME,      LPROCFS_TYPE_LATENCY,   "rename" },
2105         /* special inode operation */
2106         { LPROC_LL_STATFS,      LPROCFS_TYPE_LATENCY,   "statfs" },
2107         { LPROC_LL_SETXATTR,    LPROCFS_TYPE_LATENCY,   "setxattr" },
2108         { LPROC_LL_GETXATTR,    LPROCFS_TYPE_LATENCY,   "getxattr" },
2109         { LPROC_LL_GETXATTR_HITS, LPROCFS_TYPE_REQS,    "getxattr_hits" },
2110         { LPROC_LL_LISTXATTR,   LPROCFS_TYPE_LATENCY,   "listxattr" },
2111         { LPROC_LL_REMOVEXATTR, LPROCFS_TYPE_LATENCY,   "removexattr" },
2112         { LPROC_LL_INODE_PERM,  LPROCFS_TYPE_LATENCY,   "inode_permission" },
2113 };
2114
2115 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, long count)
2116 {
2117         if (!sbi->ll_stats)
2118                 return;
2119
2120         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
2121                 lprocfs_counter_add(sbi->ll_stats, op, count);
2122         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
2123                  sbi->ll_stats_track_id == current->pid)
2124                 lprocfs_counter_add(sbi->ll_stats, op, count);
2125         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
2126                  sbi->ll_stats_track_id == current->real_parent->pid)
2127                 lprocfs_counter_add(sbi->ll_stats, op, count);
2128         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
2129                  sbi->ll_stats_track_id ==
2130                         from_kgid(&init_user_ns, current_gid()))
2131                 lprocfs_counter_add(sbi->ll_stats, op, count);
2132 }
2133 EXPORT_SYMBOL(ll_stats_ops_tally);
2134
2135 static const char *const ra_stat_string[] = {
2136         [RA_STAT_HIT]                   = "hits",
2137         [RA_STAT_MISS]                  = "misses",
2138         [RA_STAT_DISTANT_READPAGE]      = "readpage_not_consecutive",
2139         [RA_STAT_MISS_IN_WINDOW]        = "miss_inside_window",
2140         [RA_STAT_FAILED_GRAB_PAGE]      = "failed_grab_cache_page",
2141         [RA_STAT_FAILED_MATCH]          = "failed_lock_match",
2142         [RA_STAT_DISCARDED]             = "read_but_discarded",
2143         [RA_STAT_ZERO_LEN]              = "zero_length_file",
2144         [RA_STAT_ZERO_WINDOW]           = "zero_size_window",
2145         [RA_STAT_EOF]                   = "readahead_to_eof",
2146         [RA_STAT_MAX_IN_FLIGHT]         = "hit_max_readahead_issue",
2147         [RA_STAT_WRONG_GRAB_PAGE]       = "wrong_page_from_grab_cache_page",
2148         [RA_STAT_FAILED_REACH_END]      = "failed_to_reach_end",
2149         [RA_STAT_ASYNC]                 = "async_readahead",
2150         [RA_STAT_FAILED_FAST_READ]      = "failed_to_fast_read",
2151         [RA_STAT_MMAP_RANGE_READ]       = "mmap_range_read",
2152         [RA_STAT_READAHEAD_PAGES]       = "readahead_pages"
2153 };
2154
2155 int ll_debugfs_register_super(struct super_block *sb, const char *name)
2156 {
2157         struct lustre_sb_info *lsi = s2lsi(sb);
2158         struct ll_sb_info *sbi = ll_s2sbi(sb);
2159         int err, id;
2160
2161         ENTRY;
2162         LASSERT(sbi);
2163
2164         if (IS_ERR_OR_NULL(llite_root))
2165                 goto out_ll_kset;
2166
2167         sbi->ll_debugfs_entry = debugfs_create_dir(name, llite_root);
2168         ldebugfs_add_vars(sbi->ll_debugfs_entry, lprocfs_llite_obd_vars, sb);
2169
2170         debugfs_create_file("dump_page_cache", 0444, sbi->ll_debugfs_entry, sbi,
2171                             &vvp_dump_pgcache_file_ops);
2172
2173         debugfs_create_file("extents_stats", 0644, sbi->ll_debugfs_entry, sbi,
2174                                  &ll_rw_extents_stats_fops);
2175
2176         debugfs_create_file("extents_stats_per_process", 0644,
2177                             sbi->ll_debugfs_entry, sbi,
2178                             &ll_rw_extents_stats_pp_fops);
2179
2180         debugfs_create_file("offset_stats", 0644, sbi->ll_debugfs_entry, sbi,
2181                             &ll_rw_offset_stats_fops);
2182
2183         /* File operations stats */
2184         sbi->ll_stats = lprocfs_stats_alloc(LPROC_LL_FILE_OPCODES,
2185                                             LPROCFS_STATS_FLAG_NONE);
2186         if (sbi->ll_stats == NULL)
2187                 GOTO(out_debugfs, err = -ENOMEM);
2188
2189         /* do counter init */
2190         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++)
2191                 lprocfs_counter_init(sbi->ll_stats,
2192                                      llite_opcode_table[id].lfo_opcode,
2193                                      llite_opcode_table[id].lfo_config,
2194                                      llite_opcode_table[id].lfo_opname);
2195
2196         debugfs_create_file("stats", 0644, sbi->ll_debugfs_entry,
2197                             sbi->ll_stats, &ldebugfs_stats_seq_fops);
2198
2199         sbi->ll_ra_stats = lprocfs_stats_alloc(ARRAY_SIZE(ra_stat_string),
2200                                                LPROCFS_STATS_FLAG_NONE);
2201         if (sbi->ll_ra_stats == NULL)
2202                 GOTO(out_stats, err = -ENOMEM);
2203
2204         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++) {
2205                 if (id == RA_STAT_READAHEAD_PAGES)
2206                         lprocfs_counter_init(sbi->ll_ra_stats, id,
2207                                              LPROCFS_TYPE_PAGES |
2208                                              LPROCFS_CNTR_AVGMINMAX,
2209                                              ra_stat_string[id]);
2210                 else
2211                         lprocfs_counter_init(sbi->ll_ra_stats, id,
2212                                              LPROCFS_TYPE_PAGES,
2213                                              ra_stat_string[id]);
2214         }
2215
2216         debugfs_create_file("read_ahead_stats", 0644, sbi->ll_debugfs_entry,
2217                             sbi->ll_ra_stats, &ldebugfs_stats_seq_fops);
2218
2219 out_ll_kset:
2220         /* Yes we also register sysfs mount kset here as well */
2221         sbi->ll_kset.kobj.parent = llite_kobj;
2222         sbi->ll_kset.kobj.ktype = &sbi_ktype;
2223         init_completion(&sbi->ll_kobj_unregister);
2224         err = kobject_set_name(&sbi->ll_kset.kobj, "%s", name);
2225         if (err)
2226                 GOTO(out_ra_stats, err);
2227
2228         err = kset_register(&sbi->ll_kset);
2229         if (err)
2230                 GOTO(out_ra_stats, err);
2231
2232         lsi->lsi_kobj = kobject_get(&sbi->ll_kset.kobj);
2233
2234         RETURN(0);
2235 out_ra_stats:
2236         lprocfs_stats_free(&sbi->ll_ra_stats);
2237 out_stats:
2238         lprocfs_stats_free(&sbi->ll_stats);
2239 out_debugfs:
2240         debugfs_remove_recursive(sbi->ll_debugfs_entry);
2241
2242         RETURN(err);
2243 }
2244
2245 void ll_debugfs_unregister_super(struct super_block *sb)
2246 {
2247         struct lustre_sb_info *lsi = s2lsi(sb);
2248         struct ll_sb_info *sbi = ll_s2sbi(sb);
2249
2250         debugfs_remove_recursive(sbi->ll_debugfs_entry);
2251
2252         if (sbi->ll_dt_obd)
2253                 sysfs_remove_link(&sbi->ll_kset.kobj,
2254                                   sbi->ll_dt_obd->obd_type->typ_name);
2255
2256         if (sbi->ll_md_obd)
2257                 sysfs_remove_link(&sbi->ll_kset.kobj,
2258                                   sbi->ll_md_obd->obd_type->typ_name);
2259
2260         kobject_put(lsi->lsi_kobj);
2261
2262         kset_unregister(&sbi->ll_kset);
2263         wait_for_completion(&sbi->ll_kobj_unregister);
2264
2265         lprocfs_stats_free(&sbi->ll_ra_stats);
2266         lprocfs_stats_free(&sbi->ll_stats);
2267 }
2268 #undef MAX_STRING_SIZE
2269
2270 static void ll_display_extents_info(struct ll_rw_extents_info *rw_extents,
2271                                     struct seq_file *seq, int which)
2272 {
2273         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
2274         unsigned long start, end, r, w;
2275         char *unitp = "KMGTPEZY";
2276         int i, units = 10;
2277         struct per_process_info *pp_info;
2278
2279         pp_info = &rw_extents->pp_extents[which];
2280         read_cum = 0;
2281         write_cum = 0;
2282         start = 0;
2283
2284         for (i = 0; i < LL_HIST_MAX; i++) {
2285                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
2286                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
2287         }
2288
2289         for (i = 0; i < LL_HIST_MAX; i++) {
2290                 r = pp_info->pp_r_hist.oh_buckets[i];
2291                 w = pp_info->pp_w_hist.oh_buckets[i];
2292                 read_cum += r;
2293                 write_cum += w;
2294                 end = 1 << (i + LL_HIST_START - units);
2295                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4u %4u  | "
2296                            "%14lu %4u %4u\n", start, *unitp, end, *unitp,
2297                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
2298                            r, pct(r, read_tot), pct(read_cum, read_tot),
2299                            w, pct(w, write_tot), pct(write_cum, write_tot));
2300                 start = end;
2301                 if (start == (1 << 10)) {
2302                         start = 1;
2303                         units += 10;
2304                         unitp++;
2305                 }
2306                 if (read_cum == read_tot && write_cum == write_tot)
2307                         break;
2308         }
2309 }
2310
2311 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
2312 {
2313         struct ll_sb_info *sbi = seq->private;
2314         struct ll_rw_extents_info *rw_extents = sbi->ll_rw_extents_info;
2315         int k;
2316
2317         if (!sbi->ll_rw_stats_on || !rw_extents) {
2318                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
2319                 return 0;
2320         }
2321
2322         spin_lock(&sbi->ll_pp_extent_lock);
2323         lprocfs_stats_header(seq, ktime_get_real(), rw_extents->pp_init, 25,
2324                              ":", true, "");
2325         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
2326         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
2327                    "extents", "calls", "%", "cum%", "calls", "%", "cum%");
2328
2329         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
2330                 if (rw_extents->pp_extents[k].pid != 0) {
2331                         seq_printf(seq, "\nPID: %d\n",
2332                                    rw_extents->pp_extents[k].pid);
2333                         ll_display_extents_info(rw_extents, seq, k);
2334                 }
2335         }
2336         spin_unlock(&sbi->ll_pp_extent_lock);
2337         return 0;
2338 }
2339
2340 static int alloc_rw_stats_info(struct ll_sb_info *sbi)
2341 {
2342         struct ll_rw_extents_info *rw_extents;
2343         struct ll_rw_process_info *offset;
2344         struct ll_rw_process_info *process;
2345         int i, rc = 0;
2346
2347         OBD_ALLOC(rw_extents, sizeof(*rw_extents));
2348         if (!rw_extents)
2349                 return -ENOMEM;
2350
2351         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
2352                 spin_lock_init(&rw_extents->pp_extents[i].pp_r_hist.oh_lock);
2353                 spin_lock_init(&rw_extents->pp_extents[i].pp_w_hist.oh_lock);
2354         }
2355         rw_extents->pp_init = ktime_get_real();
2356
2357         spin_lock(&sbi->ll_pp_extent_lock);
2358         if (!sbi->ll_rw_extents_info)
2359                 sbi->ll_rw_extents_info = rw_extents;
2360         spin_unlock(&sbi->ll_pp_extent_lock);
2361         /* another writer allocated the struct before we got the lock */
2362         if (sbi->ll_rw_extents_info != rw_extents)
2363                 OBD_FREE(rw_extents, sizeof(*rw_extents));
2364
2365         OBD_ALLOC(process, sizeof(*process) * LL_PROCESS_HIST_MAX);
2366         if (!process)
2367                 GOTO(out, rc = -ENOMEM);
2368         OBD_ALLOC(offset, sizeof(*offset) * LL_OFFSET_HIST_MAX);
2369         if (!offset)
2370                 GOTO(out_free, rc = -ENOMEM);
2371
2372         spin_lock(&sbi->ll_process_lock);
2373         if (!sbi->ll_rw_process_info)
2374                 sbi->ll_rw_process_info = process;
2375         if (!sbi->ll_rw_offset_info)
2376                 sbi->ll_rw_offset_info = offset;
2377         spin_unlock(&sbi->ll_process_lock);
2378         sbi->ll_process_stats_init = ktime_get_real();
2379
2380         /* another writer allocated the structs before we got the lock */
2381         if (sbi->ll_rw_offset_info != offset)
2382                 OBD_FREE(offset, sizeof(*offset) * LL_OFFSET_HIST_MAX);
2383         if (sbi->ll_rw_process_info != process) {
2384 out_free:
2385                 OBD_FREE(process, sizeof(*process) * LL_PROCESS_HIST_MAX);
2386         }
2387
2388 out:
2389         return rc;
2390 }
2391
2392 void ll_free_rw_stats_info(struct ll_sb_info *sbi)
2393 {
2394         if (sbi->ll_rw_extents_info) {
2395                 OBD_FREE(sbi->ll_rw_extents_info,
2396                          sizeof(*sbi->ll_rw_extents_info));
2397                 sbi->ll_rw_extents_info = NULL;
2398         }
2399         if (sbi->ll_rw_offset_info) {
2400                 OBD_FREE(sbi->ll_rw_offset_info,
2401                          sizeof(*sbi->ll_rw_offset_info) * LL_OFFSET_HIST_MAX);
2402                 sbi->ll_rw_offset_info = NULL;
2403         }
2404         if (sbi->ll_rw_process_info) {
2405                 OBD_FREE(sbi->ll_rw_process_info,
2406                         sizeof(*sbi->ll_rw_process_info) * LL_PROCESS_HIST_MAX);
2407                 sbi->ll_rw_process_info = NULL;
2408         }
2409 }
2410
2411 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
2412                                                 const char __user *buf,
2413                                                 size_t len, loff_t *off)
2414 {
2415         struct seq_file *seq = file->private_data;
2416         struct ll_sb_info *sbi = seq->private;
2417         struct ll_rw_extents_info *rw_extents;
2418         int i;
2419         __s64 value;
2420
2421         if (len == 0)
2422                 return -EINVAL;
2423
2424         value = ll_stats_pid_write(buf, len);
2425
2426         if (value == 0) {
2427                 sbi->ll_rw_stats_on = 0;
2428         } else {
2429                 if (!sbi->ll_rw_extents_info) {
2430                         int rc = alloc_rw_stats_info(sbi);
2431
2432                         if (rc)
2433                                 return rc;
2434                 }
2435                 sbi->ll_rw_stats_on = 1;
2436         }
2437
2438
2439         spin_lock(&sbi->ll_pp_extent_lock);
2440         rw_extents = sbi->ll_rw_extents_info;
2441         if (rw_extents) {
2442                 rw_extents->pp_init = ktime_get_real();
2443                 for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
2444                         rw_extents->pp_extents[i].pid = 0;
2445                         lprocfs_oh_clear(&rw_extents->pp_extents[i].pp_r_hist);
2446                         lprocfs_oh_clear(&rw_extents->pp_extents[i].pp_w_hist);
2447                 }
2448         }
2449         spin_unlock(&sbi->ll_pp_extent_lock);
2450
2451         return len;
2452 }
2453
2454 LDEBUGFS_SEQ_FOPS(ll_rw_extents_stats_pp);
2455
2456 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
2457 {
2458         struct ll_sb_info *sbi = seq->private;
2459         struct ll_rw_extents_info *rw_extents = sbi->ll_rw_extents_info;
2460
2461         if (!sbi->ll_rw_stats_on || !rw_extents) {
2462                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
2463                 return 0;
2464         }
2465
2466         spin_lock(&sbi->ll_lock);
2467         lprocfs_stats_header(seq, ktime_get_real(), rw_extents->pp_init, 25,
2468                              ":", true, "");
2469
2470         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
2471         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
2472                    "extents", "calls", "%", "cum%",
2473                    "calls", "%", "cum%");
2474
2475         ll_display_extents_info(rw_extents, seq, LL_PROCESS_HIST_MAX);
2476         spin_unlock(&sbi->ll_lock);
2477
2478         return 0;
2479 }
2480
2481 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
2482                                              const char __user *buf,
2483                                              size_t len, loff_t *off)
2484 {
2485         struct seq_file *seq = file->private_data;
2486         struct ll_sb_info *sbi = seq->private;
2487         struct ll_rw_extents_info *rw_extents;
2488         int i;
2489         __s64 value;
2490
2491         if (len == 0)
2492                 return -EINVAL;
2493
2494         value = ll_stats_pid_write(buf, len);
2495
2496         if (value == 0) {
2497                 sbi->ll_rw_stats_on = 0;
2498         } else {
2499                 if (!sbi->ll_rw_extents_info) {
2500                         int rc = alloc_rw_stats_info(sbi);
2501
2502                         if (rc)
2503                                 return rc;
2504                 }
2505                 sbi->ll_rw_stats_on = 1;
2506         }
2507
2508         spin_lock(&sbi->ll_pp_extent_lock);
2509         rw_extents = sbi->ll_rw_extents_info;
2510         if (rw_extents) {
2511                 rw_extents->pp_init = ktime_get_real();
2512                 for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
2513                         rw_extents->pp_extents[i].pid = 0;
2514                         lprocfs_oh_clear(&rw_extents->pp_extents[i].pp_r_hist);
2515                         lprocfs_oh_clear(&rw_extents->pp_extents[i].pp_w_hist);
2516                 }
2517         }
2518         spin_unlock(&sbi->ll_pp_extent_lock);
2519
2520         return len;
2521 }
2522
2523 LDEBUGFS_SEQ_FOPS(ll_rw_extents_stats);
2524
2525 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
2526                        struct ll_file_data *file, loff_t pos,
2527                        size_t count, int rw)
2528 {
2529         int i, cur = -1;
2530         struct ll_rw_process_info *process;
2531         struct ll_rw_process_info *offset;
2532         int *off_count = &sbi->ll_rw_offset_entry_count;
2533         int *process_count = &sbi->ll_offset_process_count;
2534         struct ll_rw_extents_info *rw_extents;
2535
2536         if (!sbi->ll_rw_stats_on)
2537                 return;
2538
2539         spin_lock(&sbi->ll_pp_extent_lock);
2540         rw_extents = sbi->ll_rw_extents_info;
2541         if (!rw_extents) {
2542                 spin_unlock(&sbi->ll_pp_extent_lock);
2543                 return;
2544         }
2545
2546         /* Extent statistics */
2547         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
2548                 if (rw_extents->pp_extents[i].pid == pid) {
2549                         cur = i;
2550                         break;
2551                 }
2552         }
2553
2554         if (cur == -1) {
2555                 /* new process */
2556                 sbi->ll_extent_process_count =
2557                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
2558                 cur = sbi->ll_extent_process_count;
2559                 rw_extents->pp_extents[cur].pid = pid;
2560                 lprocfs_oh_clear(&rw_extents->pp_extents[cur].pp_r_hist);
2561                 lprocfs_oh_clear(&rw_extents->pp_extents[cur].pp_w_hist);
2562         }
2563
2564         for (i = 0; (count >= 1 << (LL_HIST_START + i)) &&
2565              (i < (LL_HIST_MAX - 1)); i++);
2566         if (rw == 0) {
2567                 rw_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
2568                 rw_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
2569         } else {
2570                 rw_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
2571                 rw_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
2572         }
2573         spin_unlock(&sbi->ll_pp_extent_lock);
2574
2575         spin_lock(&sbi->ll_process_lock);
2576         process = sbi->ll_rw_process_info;
2577         offset = sbi->ll_rw_offset_info;
2578         if (!process || !offset)
2579                 goto out_unlock;
2580
2581         /* Offset statistics */
2582         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
2583                 if (process[i].rw_pid == pid) {
2584                         if (process[i].rw_last_file != file) {
2585                                 process[i].rw_range_start = pos;
2586                                 process[i].rw_last_file_pos = pos + count;
2587                                 process[i].rw_smallest_extent = count;
2588                                 process[i].rw_largest_extent = count;
2589                                 process[i].rw_offset = 0;
2590                                 process[i].rw_last_file = file;
2591                                 goto out_unlock;
2592                         }
2593                         if (process[i].rw_last_file_pos != pos) {
2594                                 *off_count =
2595                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
2596                                 offset[*off_count].rw_op = process[i].rw_op;
2597                                 offset[*off_count].rw_pid = pid;
2598                                 offset[*off_count].rw_range_start =
2599                                         process[i].rw_range_start;
2600                                 offset[*off_count].rw_range_end =
2601                                         process[i].rw_last_file_pos;
2602                                 offset[*off_count].rw_smallest_extent =
2603                                         process[i].rw_smallest_extent;
2604                                 offset[*off_count].rw_largest_extent =
2605                                         process[i].rw_largest_extent;
2606                                 offset[*off_count].rw_offset =
2607                                         process[i].rw_offset;
2608                                 process[i].rw_op = rw;
2609                                 process[i].rw_range_start = pos;
2610                                 process[i].rw_smallest_extent = count;
2611                                 process[i].rw_largest_extent = count;
2612                                 process[i].rw_offset = pos -
2613                                         process[i].rw_last_file_pos;
2614                         }
2615                         if (process[i].rw_smallest_extent > count)
2616                                 process[i].rw_smallest_extent = count;
2617                         if (process[i].rw_largest_extent < count)
2618                                 process[i].rw_largest_extent = count;
2619                         process[i].rw_last_file_pos = pos + count;
2620                         goto out_unlock;
2621                 }
2622         }
2623         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
2624         process[*process_count].rw_pid = pid;
2625         process[*process_count].rw_op = rw;
2626         process[*process_count].rw_range_start = pos;
2627         process[*process_count].rw_last_file_pos = pos + count;
2628         process[*process_count].rw_smallest_extent = count;
2629         process[*process_count].rw_largest_extent = count;
2630         process[*process_count].rw_offset = 0;
2631         process[*process_count].rw_last_file = file;
2632
2633 out_unlock:
2634         spin_unlock(&sbi->ll_process_lock);
2635 }
2636
2637 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
2638 {
2639         struct ll_sb_info *sbi = seq->private;
2640         struct ll_rw_process_info *offset;
2641         struct ll_rw_process_info *process;
2642         int i;
2643
2644         if (!sbi->ll_rw_stats_on) {
2645                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
2646                 return 0;
2647         }
2648
2649         spin_lock(&sbi->ll_process_lock);
2650         lprocfs_stats_header(seq, ktime_get_real(), sbi->ll_process_stats_init,
2651                              25, ":", true, "");
2652         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
2653                    "R/W", "PID", "RANGE START", "RANGE END",
2654                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
2655
2656         /* We stored the discontiguous offsets here; print them first */
2657         offset = sbi->ll_rw_offset_info;
2658         for (i = 0; offset && i < LL_OFFSET_HIST_MAX; i++) {
2659                 if (offset[i].rw_pid != 0)
2660                         seq_printf(seq,
2661                                   "%3c %10d %14llu %14llu %17lu %17lu %14lld\n",
2662                                    offset[i].rw_op == READ ? 'R' : 'W',
2663                                    offset[i].rw_pid,
2664                                    offset[i].rw_range_start,
2665                                    offset[i].rw_range_end,
2666                                    (unsigned long)offset[i].rw_smallest_extent,
2667                                    (unsigned long)offset[i].rw_largest_extent,
2668                                    offset[i].rw_offset);
2669         }
2670
2671         /* Then print the current offsets for each process */
2672         process = sbi->ll_rw_process_info;
2673         for (i = 0; process && i < LL_PROCESS_HIST_MAX; i++) {
2674                 if (process[i].rw_pid != 0)
2675                         seq_printf(seq,
2676                                   "%3c %10d %14llu %14llu %17lu %17lu %14lld\n",
2677                                    process[i].rw_op == READ ? 'R' : 'W',
2678                                    process[i].rw_pid,
2679                                    process[i].rw_range_start,
2680                                    process[i].rw_last_file_pos,
2681                                    (unsigned long)process[i].rw_smallest_extent,
2682                                    (unsigned long)process[i].rw_largest_extent,
2683                                    process[i].rw_offset);
2684         }
2685         spin_unlock(&sbi->ll_process_lock);
2686
2687         return 0;
2688 }
2689
2690 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
2691                                             const char __user *buf,
2692                                             size_t len, loff_t *off)
2693 {
2694         struct seq_file *seq = file->private_data;
2695         struct ll_sb_info *sbi = seq->private;
2696         __s64 value;
2697
2698         if (len == 0)
2699                 return -EINVAL;
2700
2701         value = ll_stats_pid_write(buf, len);
2702
2703         if (value == 0) {
2704                 sbi->ll_rw_stats_on = 0;
2705         } else {
2706                 if (!sbi->ll_rw_process_info || !sbi->ll_rw_offset_info) {
2707                         int rc = alloc_rw_stats_info(sbi);
2708
2709                         if (rc)
2710                                 return rc;
2711                 }
2712                 sbi->ll_rw_stats_on = 1;
2713         }
2714
2715         spin_lock(&sbi->ll_process_lock);
2716         sbi->ll_offset_process_count = 0;
2717         sbi->ll_rw_offset_entry_count = 0;
2718         sbi->ll_process_stats_init = ktime_get_real();
2719         if (sbi->ll_rw_process_info)
2720                 memset(sbi->ll_rw_process_info, 0,
2721                        sizeof(struct ll_rw_process_info) * LL_PROCESS_HIST_MAX);
2722         if (sbi->ll_rw_offset_info)
2723                 memset(sbi->ll_rw_offset_info, 0,
2724                        sizeof(struct ll_rw_process_info) * LL_OFFSET_HIST_MAX);
2725         spin_unlock(&sbi->ll_process_lock);
2726
2727         return len;
2728 }
2729
2730 LDEBUGFS_SEQ_FOPS(ll_rw_offset_stats);