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 int ll_max_readahead_mb_seq_show(struct seq_file *m, void *v)
 325 {
 326         struct super_block *sb = m->private;
 327         struct ll_sb_info *sbi = ll_s2sbi(sb);
 328         unsigned long ra_max_mb;
 329
 330         spin_lock(&sbi->ll_lock);
 331         ra_max_mb = PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages);
 332         spin_unlock(&sbi->ll_lock);
 333
 334         seq_printf(m, "%lu\n", ra_max_mb);
 335         return 0;
 336 }
 337
 338 static ssize_t
 339 ll_max_readahead_mb_seq_write(struct file *file, const char __user *buffer,
 340                               size_t count, loff_t *off)
 341 {
 342         struct seq_file *m = file->private_data;
 343         struct super_block *sb = m->private;
 344         struct ll_sb_info *sbi = ll_s2sbi(sb);
 345         s64 ra_max_mb, pages_number;
 346         int rc;
 347
 348         rc = lprocfs_str_with_units_to_s64(buffer, count, &ra_max_mb, 'M');
 349         if (rc)
 350                 return rc;
 351
 352         pages_number = round_up(ra_max_mb, 1024 * 1024) >> PAGE_SHIFT;
 353         if (pages_number < 0 || pages_number > cfs_totalram_pages() / 2) {
 354                 /* 1/2 of RAM */
 355                 CERROR("%s: can't set max_readahead_mb=%llu > %luMB\n",
 356                        sbi->ll_fsname, PAGES_TO_MiB(pages_number),
 357                        PAGES_TO_MiB(cfs_totalram_pages()));
 358                 return -ERANGE;
 359         }
 360
 361         spin_lock(&sbi->ll_lock);
 362         sbi->ll_ra_info.ra_max_pages = pages_number;
 363         spin_unlock(&sbi->ll_lock);
 364
 365         return count;
 366 }
 367
 368 LDEBUGFS_SEQ_FOPS(ll_max_readahead_mb);
 369
 370 static int ll_max_readahead_per_file_mb_seq_show(struct seq_file *m, void *v)
 371 {
 372         struct super_block *sb = m->private;
 373         struct ll_sb_info *sbi = ll_s2sbi(sb);
 374         unsigned long ra_max_file_mb;
 375
 376         spin_lock(&sbi->ll_lock);
 377         ra_max_file_mb = PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages_per_file);
 378         spin_unlock(&sbi->ll_lock);
 379
 380         seq_printf(m, "%lu\n", ra_max_file_mb);
 381         return 0;
 382 }
 383
 384 static ssize_t
 385 ll_max_readahead_per_file_mb_seq_write(struct file *file,
 386                                        const char __user *buffer,
 387                                        size_t count, loff_t *off)
 388 {
 389         struct seq_file *m = file->private_data;
 390         struct super_block *sb = m->private;
 391         struct ll_sb_info *sbi = ll_s2sbi(sb);
 392         s64 ra_max_file_mb, pages_number;
 393         int rc;
 394
 395         rc = lprocfs_str_with_units_to_s64(buffer, count, &ra_max_file_mb,
 396                                            'M');
 397         if (rc)
 398                 return rc;
 399
 400         pages_number = round_up(ra_max_file_mb, 1024 * 1024) >> PAGE_SHIFT;
 401         if (pages_number < 0 || pages_number > sbi->ll_ra_info.ra_max_pages) {
 402                 CERROR("%s: can't set max_readahead_per_file_mb=%llu > max_read_ahead_mb=%lu\n",
 403                        sbi->ll_fsname, PAGES_TO_MiB(pages_number),
 404                        PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages));
 405                 return -ERANGE;
 406         }
 407
 408         spin_lock(&sbi->ll_lock);
 409         sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
 410         spin_unlock(&sbi->ll_lock);
 411
 412         return count;
 413 }
 414
 415 LDEBUGFS_SEQ_FOPS(ll_max_readahead_per_file_mb);
 416
 417 static int ll_max_read_ahead_whole_mb_seq_show(struct seq_file *m, void *v)
 418 {
 419         struct super_block *sb = m->private;
 420         struct ll_sb_info *sbi = ll_s2sbi(sb);
 421         unsigned long ra_max_whole_mb;
 422
 423         spin_lock(&sbi->ll_lock);
 424         ra_max_whole_mb = PAGES_TO_MiB(sbi->ll_ra_info.ra_max_read_ahead_whole_pages);
 425         spin_unlock(&sbi->ll_lock);
 426
 427         seq_printf(m, "%lu\n", ra_max_whole_mb);
 428         return 0;
 429 }
 430
 431 static ssize_t
 432 ll_max_read_ahead_whole_mb_seq_write(struct file *file,
 433                                      const char __user *buffer,
 434                                      size_t count, loff_t *off)
 435 {
 436         struct seq_file *m = file->private_data;
 437         struct super_block *sb = m->private;
 438         struct ll_sb_info *sbi = ll_s2sbi(sb);
 439         s64 ra_max_whole_mb, pages_number;
 440         int rc;
 441
 442         rc = lprocfs_str_with_units_to_s64(buffer, count, &ra_max_whole_mb,
 443                                            'M');
 444         if (rc)
 445                 return rc;
 446
 447         pages_number = round_up(ra_max_whole_mb, 1024 * 1024) >> PAGE_SHIFT;
 448         /* Cap this at the current max readahead window size, the readahead
 449          * algorithm does this anyway so it's pointless to set it larger.
 450          */
 451         if (pages_number < 0 ||
 452             pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
 453                 CERROR("%s: can't set max_read_ahead_whole_mb=%llu > max_read_ahead_per_file_mb=%lu\n",
 454                        sbi->ll_fsname, PAGES_TO_MiB(pages_number),
 455                        PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages_per_file));
 456                 return -ERANGE;
 457         }
 458
 459         spin_lock(&sbi->ll_lock);
 460         sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
 461         spin_unlock(&sbi->ll_lock);
 462
 463         return count;
 464 }
 465
 466 LDEBUGFS_SEQ_FOPS(ll_max_read_ahead_whole_mb);
 467
 468 static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v)
 469 {
 470         struct super_block     *sb    = m->private;
 471         struct ll_sb_info      *sbi   = ll_s2sbi(sb);
 472         struct cl_client_cache *cache = sbi->ll_cache;
 473         long max_cached_mb;
 474         long unused_mb;
 475
 476         max_cached_mb = PAGES_TO_MiB(cache->ccc_lru_max);
 477         unused_mb = PAGES_TO_MiB(atomic_long_read(&cache->ccc_lru_left));
 478         seq_printf(m, "users: %d\n"
 479                       "max_cached_mb: %ld\n"
 480                       "used_mb: %ld\n"
 481                       "unused_mb: %ld\n"
 482                       "reclaim_count: %u\n",
 483                    atomic_read(&cache->ccc_users),
 484                    max_cached_mb,
 485                    max_cached_mb - unused_mb,
 486                    unused_mb,
 487                    cache->ccc_lru_shrinkers);
 488         return 0;
 489 }
 490
 491 static ssize_t ll_max_cached_mb_seq_write(struct file *file,
 492                                           const char __user *buffer,
 493                                           size_t count, loff_t *off)
 494 {
 495         struct seq_file *m = file->private_data;
 496         struct super_block *sb = m->private;
 497         struct ll_sb_info *sbi = ll_s2sbi(sb);
 498         struct cl_client_cache *cache = sbi->ll_cache;
 499         struct lu_env *env;
 500         long diff = 0;
 501         long nrpages = 0;
 502         __u16 refcheck;
 503         __s64 pages_number;
 504         int rc;
 505         char kernbuf[128];
 506
 507         ENTRY;
 508         if (count >= sizeof(kernbuf))
 509                 RETURN(-EINVAL);
 510
 511         if (copy_from_user(kernbuf, buffer, count))
 512                 RETURN(-EFAULT);
 513         kernbuf[count] = 0;
 514
 515         buffer += lprocfs_find_named_value(kernbuf, "max_cached_mb:", &count) -
 516                   kernbuf;
 517         rc = lprocfs_str_with_units_to_s64(buffer, count, &pages_number, 'M');
 518         if (rc)
 519                 RETURN(rc);
 520
 521         pages_number >>= PAGE_SHIFT;
 522
 523         if (pages_number < 0 || pages_number > cfs_totalram_pages()) {
 524                 CERROR("%s: can't set max cache more than %lu MB\n",
 525                        sbi->ll_fsname,
 526                        PAGES_TO_MiB(cfs_totalram_pages()));
 527                 RETURN(-ERANGE);
 528         }
 529         /* Allow enough cache so clients can make well-formed RPCs */
 530         pages_number = max_t(long, pages_number, PTLRPC_MAX_BRW_PAGES);
 531
 532         spin_lock(&sbi->ll_lock);
 533         diff = pages_number - cache->ccc_lru_max;
 534         spin_unlock(&sbi->ll_lock);
 535
 536         /* easy - add more LRU slots. */
 537         if (diff >= 0) {
 538                 atomic_long_add(diff, &cache->ccc_lru_left);
 539                 GOTO(out, rc = 0);
 540         }
 541
 542         env = cl_env_get(&refcheck);
 543         if (IS_ERR(env))
 544                 RETURN(PTR_ERR(env));
 545
 546         diff = -diff;
 547         while (diff > 0) {
 548                 long tmp;
 549
 550                 /* reduce LRU budget from free slots. */
 551                 do {
 552                         long ov, nv;
 553
 554                         ov = atomic_long_read(&cache->ccc_lru_left);
 555                         if (ov == 0)
 556                                 break;
 557
 558                         nv = ov > diff ? ov - diff : 0;
 559                         rc = atomic_long_cmpxchg(&cache->ccc_lru_left, ov, nv);
 560                         if (likely(ov == rc)) {
 561                                 diff -= ov - nv;
 562                                 nrpages += ov - nv;
 563                                 break;
 564                         }
 565                 } while (1);
 566
 567                 if (diff <= 0)
 568                         break;
 569
 570                 if (sbi->ll_dt_exp == NULL) { /* being initialized */
 571                         rc = -ENODEV;
 572                         break;
 573                 }
 574
 575                 /* difficult - have to ask OSCs to drop LRU slots. */
 576                 tmp = diff << 1;
 577                 rc = obd_set_info_async(env, sbi->ll_dt_exp,
 578                                 sizeof(KEY_CACHE_LRU_SHRINK),
 579                                 KEY_CACHE_LRU_SHRINK,
 580                                 sizeof(tmp), &tmp, NULL);
 581                 if (rc < 0)
 582                         break;
 583         }
 584         cl_env_put(env, &refcheck);
 585
 586 out:
 587         if (rc >= 0) {
 588                 spin_lock(&sbi->ll_lock);
 589                 cache->ccc_lru_max = pages_number;
 590                 spin_unlock(&sbi->ll_lock);
 591                 rc = count;
 592         } else {
 593                 atomic_long_add(nrpages, &cache->ccc_lru_left);
 594         }
 595         return rc;
 596 }
 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         unsigned int val;
1107         int rc;
1108         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1109                                               ll_kset.kobj);
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         sbi->ll_ra_info.ra_async_max_active = val;
1124         workqueue_set_max_active(sbi->ll_ra_info.ll_readahead_wq, val);
1125
1126         return count;
1127 }
1128 LUSTRE_RW_ATTR(max_read_ahead_async_active);
1129
1130 static ssize_t read_ahead_async_file_threshold_mb_show(struct kobject *kobj,
1131                                                        struct attribute *attr,
1132                                                        char *buf)
1133 {
1134         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1135                                               ll_kset.kobj);
1136
1137         return snprintf(buf, PAGE_SIZE, "%lu\n",
1138              PAGES_TO_MiB(sbi->ll_ra_info.ra_async_pages_per_file_threshold));
1139 }
1140
1141 static ssize_t
1142 read_ahead_async_file_threshold_mb_store(struct kobject *kobj,
1143                                          struct attribute *attr,
1144                                          const char *buffer, size_t count)
1145 {
1146         unsigned long pages_number;
1147         unsigned long max_ra_per_file;
1148         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1149                                               ll_kset.kobj);
1150         int rc;
1151
1152         rc = kstrtoul(buffer, 10, &pages_number);
1153         if (rc)
1154                 return rc;
1155
1156         pages_number = MiB_TO_PAGES(pages_number);
1157         max_ra_per_file = sbi->ll_ra_info.ra_max_pages_per_file;
1158         if (pages_number < 0 || pages_number > max_ra_per_file) {
1159                 CERROR("%s: can't set read_ahead_async_file_threshold_mb=%lu > "
1160                        "max_read_readahead_per_file_mb=%lu\n", sbi->ll_fsname,
1161                        PAGES_TO_MiB(pages_number),
1162                        PAGES_TO_MiB(max_ra_per_file));
1163                 return -ERANGE;
1164         }
1165         sbi->ll_ra_info.ra_async_pages_per_file_threshold = pages_number;
1166
1167         return count;
1168 }
1169 LUSTRE_RW_ATTR(read_ahead_async_file_threshold_mb);
1170
1171 static ssize_t fast_read_show(struct kobject *kobj,
1172                               struct attribute *attr,
1173                               char *buf)
1174 {
1175         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1176                                               ll_kset.kobj);
1177
1178         return sprintf(buf, "%u\n", !!(sbi->ll_flags & LL_SBI_FAST_READ));
1179 }
1180
1181 static ssize_t fast_read_store(struct kobject *kobj,
1182                                struct attribute *attr,
1183                                const char *buffer,
1184                                size_t count)
1185 {
1186         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1187                                               ll_kset.kobj);
1188         bool val;
1189         int rc;
1190
1191         rc = kstrtobool(buffer, &val);
1192         if (rc)
1193                 return rc;
1194
1195         spin_lock(&sbi->ll_lock);
1196         if (val)
1197                 sbi->ll_flags |= LL_SBI_FAST_READ;
1198         else
1199                 sbi->ll_flags &= ~LL_SBI_FAST_READ;
1200         spin_unlock(&sbi->ll_lock);
1201
1202         return count;
1203 }
1204 LUSTRE_RW_ATTR(fast_read);
1205
1206 static ssize_t file_heat_show(struct kobject *kobj,
1207                               struct attribute *attr,
1208                               char *buf)
1209 {
1210         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1211                                               ll_kset.kobj);
1212
1213         return snprintf(buf, PAGE_SIZE, "%u\n",
1214                         !!(sbi->ll_flags & LL_SBI_FILE_HEAT));
1215 }
1216
1217 static ssize_t file_heat_store(struct kobject *kobj,
1218                                struct attribute *attr,
1219                                const char *buffer,
1220                                size_t count)
1221 {
1222         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1223                                               ll_kset.kobj);
1224         bool val;
1225         int rc;
1226
1227         rc = kstrtobool(buffer, &val);
1228         if (rc)
1229                 return rc;
1230
1231         spin_lock(&sbi->ll_lock);
1232         if (val)
1233                 sbi->ll_flags |= LL_SBI_FILE_HEAT;
1234         else
1235                 sbi->ll_flags &= ~LL_SBI_FILE_HEAT;
1236         spin_unlock(&sbi->ll_lock);
1237
1238         return count;
1239 }
1240 LUSTRE_RW_ATTR(file_heat);
1241
1242 static ssize_t heat_decay_percentage_show(struct kobject *kobj,
1243                                           struct attribute *attr,
1244                                           char *buf)
1245 {
1246         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1247                                               ll_kset.kobj);
1248
1249         return snprintf(buf, PAGE_SIZE, "%u\n",
1250                        (sbi->ll_heat_decay_weight * 100 + 128) / 256);
1251 }
1252
1253 static ssize_t heat_decay_percentage_store(struct kobject *kobj,
1254                                            struct attribute *attr,
1255                                            const char *buffer,
1256                                            size_t count)
1257 {
1258         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1259                                               ll_kset.kobj);
1260         unsigned long val;
1261         int rc;
1262
1263         rc = kstrtoul(buffer, 10, &val);
1264         if (rc)
1265                 return rc;
1266
1267         if (val < 0 || val > 100)
1268                 return -ERANGE;
1269
1270         sbi->ll_heat_decay_weight = (val * 256 + 50) / 100;
1271
1272         return count;
1273 }
1274 LUSTRE_RW_ATTR(heat_decay_percentage);
1275
1276 static ssize_t heat_period_second_show(struct kobject *kobj,
1277                                        struct attribute *attr,
1278                                        char *buf)
1279 {
1280         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1281                                               ll_kset.kobj);
1282
1283         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_heat_period_second);
1284 }
1285
1286 static ssize_t heat_period_second_store(struct kobject *kobj,
1287                                         struct attribute *attr,
1288                                         const char *buffer,
1289                                         size_t count)
1290 {
1291         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1292                                               ll_kset.kobj);
1293         unsigned long val;
1294         int rc;
1295
1296         rc = kstrtoul(buffer, 10, &val);
1297         if (rc)
1298                 return rc;
1299
1300         if (val <= 0)
1301                 return -ERANGE;
1302
1303         sbi->ll_heat_period_second = val;
1304
1305         return count;
1306 }
1307 LUSTRE_RW_ATTR(heat_period_second);
1308
1309 static int ll_unstable_stats_seq_show(struct seq_file *m, void *v)
1310 {
1311         struct super_block      *sb    = m->private;
1312         struct ll_sb_info       *sbi   = ll_s2sbi(sb);
1313         struct cl_client_cache  *cache = sbi->ll_cache;
1314         long pages;
1315         int mb;
1316
1317         pages = atomic_long_read(&cache->ccc_unstable_nr);
1318         mb    = (pages * PAGE_SIZE) >> 20;
1319
1320         seq_printf(m, "unstable_check:     %8d\n"
1321                       "unstable_pages: %12ld\n"
1322                       "unstable_mb:        %8d\n",
1323                    cache->ccc_unstable_check, pages, mb);
1324         return 0;
1325 }
1326
1327 static ssize_t ll_unstable_stats_seq_write(struct file *file,
1328                                            const char __user *buffer,
1329                                            size_t count, loff_t *unused)
1330 {
1331         struct seq_file *seq = file->private_data;
1332         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)seq->private);
1333         char kernbuf[128];
1334         bool val;
1335         int rc;
1336
1337         if (count == 0)
1338                 return 0;
1339         if (count >= sizeof(kernbuf))
1340                 return -EINVAL;
1341
1342         if (copy_from_user(kernbuf, buffer, count))
1343                 return -EFAULT;
1344         kernbuf[count] = 0;
1345
1346         buffer += lprocfs_find_named_value(kernbuf, "unstable_check:", &count) -
1347                   kernbuf;
1348         rc = kstrtobool_from_user(buffer, count, &val);
1349         if (rc < 0)
1350                 return rc;
1351
1352         /* borrow lru lock to set the value */
1353         spin_lock(&sbi->ll_cache->ccc_lru_lock);
1354         sbi->ll_cache->ccc_unstable_check = val;
1355         spin_unlock(&sbi->ll_cache->ccc_lru_lock);
1356
1357         return count;
1358 }
1359
1360 LDEBUGFS_SEQ_FOPS(ll_unstable_stats);
1361
1362 static int ll_root_squash_seq_show(struct seq_file *m, void *v)
1363 {
1364         struct super_block *sb = m->private;
1365         struct ll_sb_info *sbi = ll_s2sbi(sb);
1366         struct root_squash_info *squash = &sbi->ll_squash;
1367
1368         seq_printf(m, "%u:%u\n", squash->rsi_uid, squash->rsi_gid);
1369         return 0;
1370 }
1371
1372 static ssize_t ll_root_squash_seq_write(struct file *file,
1373                                         const char __user *buffer,
1374                                         size_t count, loff_t *off)
1375 {
1376         struct seq_file *m = file->private_data;
1377         struct super_block *sb = m->private;
1378         struct ll_sb_info *sbi = ll_s2sbi(sb);
1379         struct root_squash_info *squash = &sbi->ll_squash;
1380
1381         return lprocfs_wr_root_squash(buffer, count, squash, sbi->ll_fsname);
1382 }
1383
1384 LDEBUGFS_SEQ_FOPS(ll_root_squash);
1385
1386 static int ll_nosquash_nids_seq_show(struct seq_file *m, void *v)
1387 {
1388         struct super_block *sb = m->private;
1389         struct ll_sb_info *sbi = ll_s2sbi(sb);
1390         struct root_squash_info *squash = &sbi->ll_squash;
1391         int len;
1392
1393         spin_lock(&squash->rsi_lock);
1394         if (!list_empty(&squash->rsi_nosquash_nids)) {
1395                 len = cfs_print_nidlist(m->buf + m->count, m->size - m->count,
1396                                         &squash->rsi_nosquash_nids);
1397                 m->count += len;
1398                 seq_putc(m, '\n');
1399         } else {
1400                 seq_puts(m, "NONE\n");
1401         }
1402         spin_unlock(&squash->rsi_lock);
1403
1404         return 0;
1405 }
1406
1407 static ssize_t ll_nosquash_nids_seq_write(struct file *file,
1408                                           const char __user *buffer,
1409                                           size_t count, loff_t *off)
1410 {
1411         struct seq_file *m = file->private_data;
1412         struct super_block *sb = m->private;
1413         struct ll_sb_info *sbi = ll_s2sbi(sb);
1414         struct root_squash_info *squash = &sbi->ll_squash;
1415         int rc;
1416
1417         rc = lprocfs_wr_nosquash_nids(buffer, count, squash, sbi->ll_fsname);
1418         if (rc < 0)
1419                 return rc;
1420
1421         ll_compute_rootsquash_state(sbi);
1422
1423         return rc;
1424 }
1425
1426 LDEBUGFS_SEQ_FOPS(ll_nosquash_nids);
1427
1428 static int ll_pcc_seq_show(struct seq_file *m, void *v)
1429 {
1430         struct super_block *sb = m->private;
1431         struct ll_sb_info *sbi = ll_s2sbi(sb);
1432
1433         return pcc_super_dump(&sbi->ll_pcc_super, m);
1434 }
1435
1436 static ssize_t ll_pcc_seq_write(struct file *file, const char __user *buffer,
1437                                 size_t count, loff_t *off)
1438 {
1439         struct seq_file *m = file->private_data;
1440         struct super_block *sb = m->private;
1441         struct ll_sb_info *sbi = ll_s2sbi(sb);
1442         int rc;
1443         char *kernbuf;
1444
1445         if (count >= LPROCFS_WR_PCC_MAX_CMD)
1446                 return -EINVAL;
1447
1448         if (!(exp_connect_flags2(sbi->ll_md_exp) & OBD_CONNECT2_PCC))
1449                 return -EOPNOTSUPP;
1450
1451         OBD_ALLOC(kernbuf, count + 1);
1452         if (kernbuf == NULL)
1453                 return -ENOMEM;
1454
1455         if (copy_from_user(kernbuf, buffer, count))
1456                 GOTO(out_free_kernbuff, rc = -EFAULT);
1457
1458         rc = pcc_cmd_handle(kernbuf, count, &sbi->ll_pcc_super);
1459 out_free_kernbuff:
1460         OBD_FREE(kernbuf, count + 1);
1461         return rc ? rc : count;
1462 }
1463 LPROC_SEQ_FOPS(ll_pcc);
1464
1465 struct lprocfs_vars lprocfs_llite_obd_vars[] = {
1466         { .name =       "site",
1467           .fops =       &ll_site_stats_fops                     },
1468         { .name =       "max_read_ahead_mb",
1469           .fops =       &ll_max_readahead_mb_fops               },
1470         { .name =       "max_read_ahead_per_file_mb",
1471           .fops =       &ll_max_readahead_per_file_mb_fops      },
1472         { .name =       "max_read_ahead_whole_mb",
1473           .fops =       &ll_max_read_ahead_whole_mb_fops        },
1474         { .name =       "max_cached_mb",
1475           .fops =       &ll_max_cached_mb_fops                  },
1476         { .name =       "statahead_stats",
1477           .fops =       &ll_statahead_stats_fops                },
1478         { .name =       "unstable_stats",
1479           .fops =       &ll_unstable_stats_fops                 },
1480         { .name =       "sbi_flags",
1481           .fops =       &ll_sbi_flags_fops                      },
1482         { .name =       "root_squash",
1483           .fops =       &ll_root_squash_fops                    },
1484         { .name =       "nosquash_nids",
1485           .fops =       &ll_nosquash_nids_fops                  },
1486         { .name =       "pcc",
1487           .fops =       &ll_pcc_fops,                           },
1488         { NULL }
1489 };
1490
1491 #define MAX_STRING_SIZE 128
1492
1493 static struct attribute *llite_attrs[] = {
1494         &lustre_attr_blocksize.attr,
1495         &lustre_attr_stat_blocksize.attr,
1496         &lustre_attr_kbytestotal.attr,
1497         &lustre_attr_kbytesfree.attr,
1498         &lustre_attr_kbytesavail.attr,
1499         &lustre_attr_filestotal.attr,
1500         &lustre_attr_filesfree.attr,
1501         &lustre_attr_client_type.attr,
1502         &lustre_attr_fstype.attr,
1503         &lustre_attr_uuid.attr,
1504         &lustre_attr_checksums.attr,
1505         &lustre_attr_checksum_pages.attr,
1506         &lustre_attr_stats_track_pid.attr,
1507         &lustre_attr_stats_track_ppid.attr,
1508         &lustre_attr_stats_track_gid.attr,
1509         &lustre_attr_statahead_running_max.attr,
1510         &lustre_attr_statahead_max.attr,
1511         &lustre_attr_statahead_agl.attr,
1512         &lustre_attr_lazystatfs.attr,
1513         &lustre_attr_statfs_max_age.attr,
1514         &lustre_attr_max_easize.attr,
1515         &lustre_attr_default_easize.attr,
1516         &lustre_attr_xattr_cache.attr,
1517         &lustre_attr_fast_read.attr,
1518         &lustre_attr_tiny_write.attr,
1519         &lustre_attr_file_heat.attr,
1520         &lustre_attr_heat_decay_percentage.attr,
1521         &lustre_attr_heat_period_second.attr,
1522         &lustre_attr_max_read_ahead_async_active.attr,
1523         &lustre_attr_read_ahead_async_file_threshold_mb.attr,
1524         NULL,
1525 };
1526
1527 static void sbi_kobj_release(struct kobject *kobj)
1528 {
1529         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1530                                               ll_kset.kobj);
1531         complete(&sbi->ll_kobj_unregister);
1532 }
1533
1534 static struct kobj_type sbi_ktype = {
1535         .default_attrs  = llite_attrs,
1536         .sysfs_ops      = &lustre_sysfs_ops,
1537         .release        = sbi_kobj_release,
1538 };
1539
1540 #define LPROCFS_TYPE_LATENCY \
1541         (LPROCFS_TYPE_USEC | LPROCFS_CNTR_AVGMINMAX | LPROCFS_CNTR_STDDEV)
1542 static const struct llite_file_opcode {
1543         __u32           opcode;
1544         __u32           type;
1545         const char      *opname;
1546 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
1547         /* file operation */
1548         { LPROC_LL_READ_BYTES,  LPROCFS_CNTR_AVGMINMAX | LPROCFS_TYPE_BYTES,
1549                 "read_bytes" },
1550         { LPROC_LL_WRITE_BYTES, LPROCFS_CNTR_AVGMINMAX | LPROCFS_TYPE_BYTES,
1551                 "write_bytes" },
1552         { LPROC_LL_READ,        LPROCFS_TYPE_LATENCY,   "read" },
1553         { LPROC_LL_WRITE,       LPROCFS_TYPE_LATENCY,   "write" },
1554         { LPROC_LL_IOCTL,       LPROCFS_TYPE_REQS,      "ioctl" },
1555         { LPROC_LL_OPEN,        LPROCFS_TYPE_LATENCY,   "open" },
1556         { LPROC_LL_RELEASE,     LPROCFS_TYPE_LATENCY,   "close" },
1557         { LPROC_LL_MMAP,        LPROCFS_TYPE_LATENCY,   "mmap" },
1558         { LPROC_LL_FAULT,       LPROCFS_TYPE_LATENCY,   "page_fault" },
1559         { LPROC_LL_MKWRITE,     LPROCFS_TYPE_LATENCY,   "page_mkwrite" },
1560         { LPROC_LL_LLSEEK,      LPROCFS_TYPE_LATENCY,   "seek" },
1561         { LPROC_LL_FSYNC,       LPROCFS_TYPE_LATENCY,   "fsync" },
1562         { LPROC_LL_READDIR,     LPROCFS_TYPE_LATENCY,   "readdir" },
1563         /* inode operation */
1564         { LPROC_LL_SETATTR,     LPROCFS_TYPE_LATENCY,   "setattr" },
1565         { LPROC_LL_TRUNC,       LPROCFS_TYPE_LATENCY,   "truncate" },
1566         { LPROC_LL_FLOCK,       LPROCFS_TYPE_LATENCY,   "flock" },
1567         { LPROC_LL_GETATTR,     LPROCFS_TYPE_LATENCY,   "getattr" },
1568         /* dir inode operation */
1569         { LPROC_LL_CREATE,      LPROCFS_TYPE_LATENCY,   "create" },
1570         { LPROC_LL_LINK,        LPROCFS_TYPE_LATENCY,   "link" },
1571         { LPROC_LL_UNLINK,      LPROCFS_TYPE_LATENCY,   "unlink" },
1572         { LPROC_LL_SYMLINK,     LPROCFS_TYPE_LATENCY,   "symlink" },
1573         { LPROC_LL_MKDIR,       LPROCFS_TYPE_LATENCY,   "mkdir" },
1574         { LPROC_LL_RMDIR,       LPROCFS_TYPE_LATENCY,   "rmdir" },
1575         { LPROC_LL_MKNOD,       LPROCFS_TYPE_LATENCY,   "mknod" },
1576         { LPROC_LL_RENAME,      LPROCFS_TYPE_LATENCY,   "rename" },
1577         /* special inode operation */
1578         { LPROC_LL_STATFS,      LPROCFS_TYPE_LATENCY,   "statfs" },
1579         { LPROC_LL_SETXATTR,    LPROCFS_TYPE_LATENCY,   "setxattr" },
1580         { LPROC_LL_GETXATTR,    LPROCFS_TYPE_LATENCY,   "getxattr" },
1581         { LPROC_LL_GETXATTR_HITS, LPROCFS_TYPE_REQS,    "getxattr_hits" },
1582         { LPROC_LL_LISTXATTR,   LPROCFS_TYPE_LATENCY,   "listxattr" },
1583         { LPROC_LL_REMOVEXATTR, LPROCFS_TYPE_LATENCY,   "removexattr" },
1584         { LPROC_LL_INODE_PERM,  LPROCFS_TYPE_LATENCY,   "inode_permission" },
1585 };
1586
1587 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, long count)
1588 {
1589         if (!sbi->ll_stats)
1590                 return;
1591
1592         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
1593                 lprocfs_counter_add(sbi->ll_stats, op, count);
1594         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
1595                  sbi->ll_stats_track_id == current->pid)
1596                 lprocfs_counter_add(sbi->ll_stats, op, count);
1597         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
1598                  sbi->ll_stats_track_id == current->parent->pid)
1599                 lprocfs_counter_add(sbi->ll_stats, op, count);
1600         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
1601                  sbi->ll_stats_track_id ==
1602                         from_kgid(&init_user_ns, current_gid()))
1603                 lprocfs_counter_add(sbi->ll_stats, op, count);
1604 }
1605 EXPORT_SYMBOL(ll_stats_ops_tally);
1606
1607 static const char *ra_stat_string[] = {
1608         [RA_STAT_HIT] = "hits",
1609         [RA_STAT_MISS] = "misses",
1610         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
1611         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
1612         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
1613         [RA_STAT_FAILED_MATCH] = "failed lock match",
1614         [RA_STAT_DISCARDED] = "read but discarded",
1615         [RA_STAT_ZERO_LEN] = "zero length file",
1616         [RA_STAT_ZERO_WINDOW] = "zero size window",
1617         [RA_STAT_EOF] = "read-ahead to EOF",
1618         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
1619         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
1620         [RA_STAT_FAILED_REACH_END] = "failed to reach end",
1621         [RA_STAT_ASYNC] = "async readahead",
1622         [RA_STAT_FAILED_FAST_READ] = "failed to fast read",
1623 };
1624
1625 int ll_debugfs_register_super(struct super_block *sb, const char *name)
1626 {
1627         struct lustre_sb_info *lsi = s2lsi(sb);
1628         struct ll_sb_info *sbi = ll_s2sbi(sb);
1629         int err, id, rc;
1630
1631         ENTRY;
1632         LASSERT(sbi);
1633
1634         if (IS_ERR_OR_NULL(llite_root))
1635                 goto out_ll_kset;
1636
1637         sbi->ll_debugfs_entry = ldebugfs_register(name, llite_root,
1638                                                   lprocfs_llite_obd_vars, sb);
1639         if (IS_ERR_OR_NULL(sbi->ll_debugfs_entry)) {
1640                 err = sbi->ll_debugfs_entry ? PTR_ERR(sbi->ll_debugfs_entry) :
1641                                               -ENOMEM;
1642                 sbi->ll_debugfs_entry = NULL;
1643                 RETURN(err);
1644         }
1645
1646         rc = ldebugfs_seq_create(sbi->ll_debugfs_entry, "dump_page_cache",0444,
1647                                  &vvp_dump_pgcache_file_ops, sbi);
1648         if (rc)
1649                 CWARN("Error adding the dump_page_cache file\n");
1650
1651         rc = ldebugfs_seq_create(sbi->ll_debugfs_entry, "extents_stats", 0644,
1652                                  &ll_rw_extents_stats_fops, sbi);
1653         if (rc)
1654                 CWARN("Error adding the extent_stats file\n");
1655
1656         rc = ldebugfs_seq_create(sbi->ll_debugfs_entry,
1657                                  "extents_stats_per_process", 0644,
1658                                  &ll_rw_extents_stats_pp_fops, sbi);
1659         if (rc)
1660                 CWARN("Error adding the extents_stats_per_process file\n");
1661
1662         rc = ldebugfs_seq_create(sbi->ll_debugfs_entry, "offset_stats", 0644,
1663                                  &ll_rw_offset_stats_fops, sbi);
1664         if (rc)
1665                 CWARN("Error adding the offset_stats file\n");
1666
1667         /* File operations stats */
1668         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
1669                                             LPROCFS_STATS_FLAG_NONE);
1670         if (sbi->ll_stats == NULL)
1671                 GOTO(out_debugfs, err = -ENOMEM);
1672
1673         /* do counter init */
1674         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
1675                 u32 type = llite_opcode_table[id].type;
1676                 void *ptr = NULL;
1677
1678                 if (type & LPROCFS_TYPE_REQS)
1679                         ptr = "reqs";
1680                 else if (type & LPROCFS_TYPE_BYTES)
1681                         ptr = "bytes";
1682                 else if (type & LPROCFS_TYPE_PAGES)
1683                         ptr = "pages";
1684                 else if (type & LPROCFS_TYPE_USEC)
1685                         ptr = "usec";
1686                 lprocfs_counter_init(sbi->ll_stats,
1687                                      llite_opcode_table[id].opcode,
1688                                      (type & LPROCFS_CNTR_AVGMINMAX),
1689                                      llite_opcode_table[id].opname, ptr);
1690         }
1691
1692         err = ldebugfs_register_stats(sbi->ll_debugfs_entry, "stats",
1693                                       sbi->ll_stats);
1694         if (err)
1695                 GOTO(out_stats, err);
1696
1697         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1698                                                LPROCFS_STATS_FLAG_NONE);
1699         if (sbi->ll_ra_stats == NULL)
1700                 GOTO(out_stats, err = -ENOMEM);
1701
1702         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1703                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
1704                                      ra_stat_string[id], "pages");
1705
1706         err = ldebugfs_register_stats(sbi->ll_debugfs_entry, "read_ahead_stats",
1707                                       sbi->ll_ra_stats);
1708         if (err)
1709                 GOTO(out_ra_stats, err);
1710
1711 out_ll_kset:
1712         /* Yes we also register sysfs mount kset here as well */
1713         sbi->ll_kset.kobj.parent = llite_kobj;
1714         sbi->ll_kset.kobj.ktype = &sbi_ktype;
1715         init_completion(&sbi->ll_kobj_unregister);
1716         err = kobject_set_name(&sbi->ll_kset.kobj, "%s", name);
1717         if (err)
1718                 GOTO(out_ra_stats, err);
1719
1720         err = kset_register(&sbi->ll_kset);
1721         if (err)
1722                 GOTO(out_ra_stats, err);
1723
1724         lsi->lsi_kobj = kobject_get(&sbi->ll_kset.kobj);
1725
1726         RETURN(0);
1727 out_ra_stats:
1728         lprocfs_free_stats(&sbi->ll_ra_stats);
1729 out_stats:
1730         lprocfs_free_stats(&sbi->ll_stats);
1731 out_debugfs:
1732         debugfs_remove_recursive(sbi->ll_debugfs_entry);
1733
1734         RETURN(err);
1735 }
1736
1737 void ll_debugfs_unregister_super(struct super_block *sb)
1738 {
1739         struct lustre_sb_info *lsi = s2lsi(sb);
1740         struct ll_sb_info *sbi = ll_s2sbi(sb);
1741
1742         debugfs_remove_recursive(sbi->ll_debugfs_entry);
1743
1744         if (sbi->ll_dt_obd)
1745                 sysfs_remove_link(&sbi->ll_kset.kobj,
1746                                   sbi->ll_dt_obd->obd_type->typ_name);
1747
1748         if (sbi->ll_md_obd)
1749                 sysfs_remove_link(&sbi->ll_kset.kobj,
1750                                   sbi->ll_md_obd->obd_type->typ_name);
1751
1752         kobject_put(lsi->lsi_kobj);
1753
1754         kset_unregister(&sbi->ll_kset);
1755         wait_for_completion(&sbi->ll_kobj_unregister);
1756
1757         lprocfs_free_stats(&sbi->ll_ra_stats);
1758         lprocfs_free_stats(&sbi->ll_stats);
1759 }
1760 #undef MAX_STRING_SIZE
1761
1762 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1763                                    struct seq_file *seq, int which)
1764 {
1765         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1766         unsigned long start, end, r, w;
1767         char *unitp = "KMGTPEZY";
1768         int i, units = 10;
1769         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1770
1771         read_cum = 0;
1772         write_cum = 0;
1773         start = 0;
1774
1775         for(i = 0; i < LL_HIST_MAX; i++) {
1776                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1777                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1778         }
1779
1780         for(i = 0; i < LL_HIST_MAX; i++) {
1781                 r = pp_info->pp_r_hist.oh_buckets[i];
1782                 w = pp_info->pp_w_hist.oh_buckets[i];
1783                 read_cum += r;
1784                 write_cum += w;
1785                 end = BIT(i + LL_HIST_START - units);
1786                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4u %4u  | "
1787                            "%14lu %4u %4u\n", start, *unitp, end, *unitp,
1788                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1789                            r, pct(r, read_tot), pct(read_cum, read_tot),
1790                            w, pct(w, write_tot), pct(write_cum, write_tot));
1791                 start = end;
1792                 if (start == BIT(10)) {
1793                         start = 1;
1794                         units += 10;
1795                         unitp++;
1796                 }
1797                 if (read_cum == read_tot && write_cum == write_tot)
1798                         break;
1799         }
1800 }
1801
1802 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1803 {
1804         struct timespec64 now;
1805         struct ll_sb_info *sbi = seq->private;
1806         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1807         int k;
1808
1809         ktime_get_real_ts64(&now);
1810
1811         if (!sbi->ll_rw_stats_on) {
1812                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
1813                 return 0;
1814         }
1815         seq_printf(seq, "snapshot_time:         %llu.%09lu (secs.nsecs)\n",
1816                    (s64)now.tv_sec, now.tv_nsec);
1817         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1818         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1819                    "extents", "calls", "%", "cum%",
1820                    "calls", "%", "cum%");
1821         spin_lock(&sbi->ll_pp_extent_lock);
1822         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1823                 if (io_extents->pp_extents[k].pid != 0) {
1824                         seq_printf(seq, "\nPID: %d\n",
1825                                    io_extents->pp_extents[k].pid);
1826                         ll_display_extents_info(io_extents, seq, k);
1827                 }
1828         }
1829         spin_unlock(&sbi->ll_pp_extent_lock);
1830         return 0;
1831 }
1832
1833 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1834                                                 const char __user *buf,
1835                                                 size_t len,
1836                                                 loff_t *off)
1837 {
1838         struct seq_file *seq = file->private_data;
1839         struct ll_sb_info *sbi = seq->private;
1840         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1841         int i;
1842         __s64 value;
1843
1844         if (len == 0)
1845                 return -EINVAL;
1846
1847         value = ll_stats_pid_write(buf, len);
1848
1849         if (value == 0)
1850                 sbi->ll_rw_stats_on = 0;
1851         else
1852                 sbi->ll_rw_stats_on = 1;
1853
1854         spin_lock(&sbi->ll_pp_extent_lock);
1855         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1856                 io_extents->pp_extents[i].pid = 0;
1857                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1858                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1859         }
1860         spin_unlock(&sbi->ll_pp_extent_lock);
1861         return len;
1862 }
1863
1864 LDEBUGFS_SEQ_FOPS(ll_rw_extents_stats_pp);
1865
1866 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1867 {
1868         struct timespec64 now;
1869         struct ll_sb_info *sbi = seq->private;
1870         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1871
1872         ktime_get_real_ts64(&now);
1873
1874         if (!sbi->ll_rw_stats_on) {
1875                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
1876                 return 0;
1877         }
1878         seq_printf(seq, "snapshot_time:         %llu.%09lu (secs.nsecs)\n",
1879                    (s64)now.tv_sec, now.tv_nsec);
1880
1881         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1882         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1883                    "extents", "calls", "%", "cum%",
1884                    "calls", "%", "cum%");
1885         spin_lock(&sbi->ll_lock);
1886         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1887         spin_unlock(&sbi->ll_lock);
1888
1889         return 0;
1890 }
1891
1892 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
1893                                              const char __user *buf,
1894                                              size_t len, loff_t *off)
1895 {
1896         struct seq_file *seq = file->private_data;
1897         struct ll_sb_info *sbi = seq->private;
1898         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1899         int i;
1900         __s64 value;
1901
1902         if (len == 0)
1903                 return -EINVAL;
1904
1905         value = ll_stats_pid_write(buf, len);
1906
1907         if (value == 0)
1908                 sbi->ll_rw_stats_on = 0;
1909         else
1910                 sbi->ll_rw_stats_on = 1;
1911
1912         spin_lock(&sbi->ll_pp_extent_lock);
1913         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1914                 io_extents->pp_extents[i].pid = 0;
1915                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1916                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1917         }
1918         spin_unlock(&sbi->ll_pp_extent_lock);
1919
1920         return len;
1921 }
1922
1923 LDEBUGFS_SEQ_FOPS(ll_rw_extents_stats);
1924
1925 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1926                        struct ll_file_data *file, loff_t pos,
1927                        size_t count, int rw)
1928 {
1929         int i, cur = -1;
1930         struct ll_rw_process_info *process;
1931         struct ll_rw_process_info *offset;
1932         int *off_count = &sbi->ll_rw_offset_entry_count;
1933         int *process_count = &sbi->ll_offset_process_count;
1934         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1935
1936         if(!sbi->ll_rw_stats_on)
1937                 return;
1938         process = sbi->ll_rw_process_info;
1939         offset = sbi->ll_rw_offset_info;
1940
1941         spin_lock(&sbi->ll_pp_extent_lock);
1942         /* Extent statistics */
1943         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1944                 if(io_extents->pp_extents[i].pid == pid) {
1945                         cur = i;
1946                         break;
1947                 }
1948         }
1949
1950         if (cur == -1) {
1951                 /* new process */
1952                 sbi->ll_extent_process_count =
1953                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1954                 cur = sbi->ll_extent_process_count;
1955                 io_extents->pp_extents[cur].pid = pid;
1956                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1957                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1958         }
1959
1960         for (i = 0; (count >= BIT(LL_HIST_START + i)) &&
1961              (i < (LL_HIST_MAX - 1)); i++);
1962         if (rw == 0) {
1963                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1964                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1965         } else {
1966                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1967                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1968         }
1969         spin_unlock(&sbi->ll_pp_extent_lock);
1970
1971         spin_lock(&sbi->ll_process_lock);
1972         /* Offset statistics */
1973         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1974                 if (process[i].rw_pid == pid) {
1975                         if (process[i].rw_last_file != file) {
1976                                 process[i].rw_range_start = pos;
1977                                 process[i].rw_last_file_pos = pos + count;
1978                                 process[i].rw_smallest_extent = count;
1979                                 process[i].rw_largest_extent = count;
1980                                 process[i].rw_offset = 0;
1981                                 process[i].rw_last_file = file;
1982                                 spin_unlock(&sbi->ll_process_lock);
1983                                 return;
1984                         }
1985                         if (process[i].rw_last_file_pos != pos) {
1986                                 *off_count =
1987                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1988                                 offset[*off_count].rw_op = process[i].rw_op;
1989                                 offset[*off_count].rw_pid = pid;
1990                                 offset[*off_count].rw_range_start =
1991                                         process[i].rw_range_start;
1992                                 offset[*off_count].rw_range_end =
1993                                         process[i].rw_last_file_pos;
1994                                 offset[*off_count].rw_smallest_extent =
1995                                         process[i].rw_smallest_extent;
1996                                 offset[*off_count].rw_largest_extent =
1997                                         process[i].rw_largest_extent;
1998                                 offset[*off_count].rw_offset =
1999                                         process[i].rw_offset;
2000                                 process[i].rw_op = rw;
2001                                 process[i].rw_range_start = pos;
2002                                 process[i].rw_smallest_extent = count;
2003                                 process[i].rw_largest_extent = count;
2004                                 process[i].rw_offset = pos -
2005                                         process[i].rw_last_file_pos;
2006                         }
2007                         if(process[i].rw_smallest_extent > count)
2008                                 process[i].rw_smallest_extent = count;
2009                         if(process[i].rw_largest_extent < count)
2010                                 process[i].rw_largest_extent = count;
2011                         process[i].rw_last_file_pos = pos + count;
2012                         spin_unlock(&sbi->ll_process_lock);
2013                         return;
2014                 }
2015         }
2016         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
2017         process[*process_count].rw_pid = pid;
2018         process[*process_count].rw_op = rw;
2019         process[*process_count].rw_range_start = pos;
2020         process[*process_count].rw_last_file_pos = pos + count;
2021         process[*process_count].rw_smallest_extent = count;
2022         process[*process_count].rw_largest_extent = count;
2023         process[*process_count].rw_offset = 0;
2024         process[*process_count].rw_last_file = file;
2025         spin_unlock(&sbi->ll_process_lock);
2026 }
2027
2028 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
2029 {
2030         struct timespec64 now;
2031         struct ll_sb_info *sbi = seq->private;
2032         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
2033         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
2034         int i;
2035
2036         ktime_get_real_ts64(&now);
2037
2038         if (!sbi->ll_rw_stats_on) {
2039                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
2040                 return 0;
2041         }
2042         spin_lock(&sbi->ll_process_lock);
2043
2044         seq_printf(seq, "snapshot_time:         %llu.%09lu (secs.nsecs)\n",
2045                    (s64)now.tv_sec, now.tv_nsec);
2046         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
2047                    "R/W", "PID", "RANGE START", "RANGE END",
2048                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
2049
2050         /* We stored the discontiguous offsets here; print them first */
2051         for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
2052                 if (offset[i].rw_pid != 0)
2053                         seq_printf(seq,
2054                                   "%3c %10d %14llu %14llu %17lu %17lu %14lld\n",
2055                                    offset[i].rw_op == READ ? 'R' : 'W',
2056                                    offset[i].rw_pid,
2057                                    offset[i].rw_range_start,
2058                                    offset[i].rw_range_end,
2059                                    (unsigned long)offset[i].rw_smallest_extent,
2060                                    (unsigned long)offset[i].rw_largest_extent,
2061                                    offset[i].rw_offset);
2062         }
2063
2064         /* Then print the current offsets for each process */
2065         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
2066                 if (process[i].rw_pid != 0)
2067                         seq_printf(seq,
2068                                   "%3c %10d %14llu %14llu %17lu %17lu %14lld\n",
2069                                    process[i].rw_op == READ ? 'R' : 'W',
2070                                    process[i].rw_pid,
2071                                    process[i].rw_range_start,
2072                                    process[i].rw_last_file_pos,
2073                                    (unsigned long)process[i].rw_smallest_extent,
2074                                    (unsigned long)process[i].rw_largest_extent,
2075                                    process[i].rw_offset);
2076         }
2077         spin_unlock(&sbi->ll_process_lock);
2078
2079         return 0;
2080 }
2081
2082 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
2083                                             const char __user *buf,
2084                                             size_t len, loff_t *off)
2085 {
2086         struct seq_file *seq = file->private_data;
2087         struct ll_sb_info *sbi = seq->private;
2088         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
2089         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
2090         __s64 value;
2091
2092         if (len == 0)
2093                 return -EINVAL;
2094
2095         value = ll_stats_pid_write(buf, len);
2096
2097         if (value == 0)
2098                 sbi->ll_rw_stats_on = 0;
2099         else
2100                 sbi->ll_rw_stats_on = 1;
2101
2102         spin_lock(&sbi->ll_process_lock);
2103         sbi->ll_offset_process_count = 0;
2104         sbi->ll_rw_offset_entry_count = 0;
2105         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
2106                LL_PROCESS_HIST_MAX);
2107         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
2108                LL_OFFSET_HIST_MAX);
2109         spin_unlock(&sbi->ll_process_lock);
2110
2111         return len;
2112 }
2113
2114 LDEBUGFS_SEQ_FOPS(ll_rw_offset_stats);