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