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         max_cached_mb = PAGES_TO_MiB(cache->ccc_lru_max);
 471         unused_mb = PAGES_TO_MiB(atomic_long_read(&cache->ccc_lru_left));
 472         seq_printf(m, "users: %d\n"
 473                       "max_cached_mb: %ld\n"
 474                       "used_mb: %ld\n"
 475                       "unused_mb: %ld\n"
 476                       "reclaim_count: %u\n",
 477                    atomic_read(&cache->ccc_users),
 478                    max_cached_mb,
 479                    max_cached_mb - unused_mb,
 480                    unused_mb,
 481                    cache->ccc_lru_shrinkers);
 482         return 0;
 483 }
 484
 485 static ssize_t ll_max_cached_mb_seq_write(struct file *file,
 486                                           const char __user *buffer,
 487                                           size_t count, loff_t *off)
 488 {
 489         struct seq_file *m = file->private_data;
 490         struct super_block *sb = m->private;
 491         struct ll_sb_info *sbi = ll_s2sbi(sb);
 492         struct cl_client_cache *cache = sbi->ll_cache;
 493         struct lu_env *env;
 494         long diff = 0;
 495         long nrpages = 0;
 496         __u16 refcheck;
 497         u64 pages_number;
 498         int rc;
 499         char kernbuf[128], *ptr;
 500
 501         ENTRY;
 502         if (count >= sizeof(kernbuf))
 503                 RETURN(-EINVAL);
 504
 505         if (copy_from_user(kernbuf, buffer, count))
 506                 RETURN(-EFAULT);
 507         kernbuf[count] = '\0';
 508
 509         ptr = lprocfs_find_named_value(kernbuf, "max_cached_mb:", &count);
 510         rc = sysfs_memparse(ptr, count, &pages_number, "MiB");
 511         if (rc)
 512                 RETURN(rc);
 513
 514         pages_number >>= PAGE_SHIFT;
 515
 516         if (pages_number < 0 || pages_number > cfs_totalram_pages()) {
 517                 CERROR("%s: can't set max cache more than %lu MB\n",
 518                        sbi->ll_fsname,
 519                        PAGES_TO_MiB(cfs_totalram_pages()));
 520                 RETURN(-ERANGE);
 521         }
 522         /* Allow enough cache so clients can make well-formed RPCs */
 523         pages_number = max_t(long, pages_number, PTLRPC_MAX_BRW_PAGES);
 524
 525         spin_lock(&sbi->ll_lock);
 526         diff = pages_number - cache->ccc_lru_max;
 527         spin_unlock(&sbi->ll_lock);
 528
 529         /* easy - add more LRU slots. */
 530         if (diff >= 0) {
 531                 atomic_long_add(diff, &cache->ccc_lru_left);
 532                 GOTO(out, rc = 0);
 533         }
 534
 535         env = cl_env_get(&refcheck);
 536         if (IS_ERR(env))
 537                 RETURN(PTR_ERR(env));
 538
 539         diff = -diff;
 540         while (diff > 0) {
 541                 long tmp;
 542
 543                 /* reduce LRU budget from free slots. */
 544                 do {
 545                         long ov, nv, retv;
 546
 547                         ov = atomic_long_read(&cache->ccc_lru_left);
 548                         if (ov == 0)
 549                                 break;
 550
 551                         nv = ov > diff ? ov - diff : 0;
 552                         retv = atomic_long_cmpxchg(&cache->ccc_lru_left,
 553                                                    ov, nv);
 554                         if (likely(ov == retv)) {
 555                                 diff -= ov - nv;
 556                                 nrpages += ov - nv;
 557                                 break;
 558                         }
 559                 } while (1);
 560
 561                 if (diff <= 0)
 562                         break;
 563
 564                 if (sbi->ll_dt_exp == NULL) { /* being initialized */
 565                         rc = -ENODEV;
 566                         break;
 567                 }
 568
 569                 /* difficult - have to ask OSCs to drop LRU slots. */
 570                 tmp = diff << 1;
 571                 rc = obd_set_info_async(env, sbi->ll_dt_exp,
 572                                 sizeof(KEY_CACHE_LRU_SHRINK),
 573                                 KEY_CACHE_LRU_SHRINK,
 574                                 sizeof(tmp), &tmp, NULL);
 575                 if (rc < 0)
 576                         break;
 577         }
 578         cl_env_put(env, &refcheck);
 579
 580 out:
 581         if (rc >= 0) {
 582                 spin_lock(&sbi->ll_lock);
 583                 cache->ccc_lru_max = pages_number;
 584                 spin_unlock(&sbi->ll_lock);
 585                 rc = count;
 586         } else {
 587                 atomic_long_add(nrpages, &cache->ccc_lru_left);
 588         }
 589         return rc;
 590 }
 591 LDEBUGFS_SEQ_FOPS(ll_max_cached_mb);
 592
 593 static ssize_t checksums_show(struct kobject *kobj, struct attribute *attr,
 594                               char *buf)
 595 {
 596         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 597                                               ll_kset.kobj);
 598
 599         return sprintf(buf, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
 600 }
 601
 602 static ssize_t checksums_store(struct kobject *kobj, struct attribute *attr,
 603                                const char *buffer, size_t count)
 604 {
 605         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 606                                               ll_kset.kobj);
 607         bool val;
 608         int tmp;
 609         int rc;
 610
 611         if (!sbi->ll_dt_exp)
 612                 /* Not set up yet */
 613                 return -EAGAIN;
 614
 615         rc = kstrtobool(buffer, &val);
 616         if (rc)
 617                 return rc;
 618         if (val)
 619                 sbi->ll_flags |= LL_SBI_CHECKSUM;
 620         else
 621                 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
 622         tmp = val;
 623
 624         rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
 625                                 KEY_CHECKSUM, sizeof(tmp), &tmp, NULL);
 626         if (rc)
 627                 CWARN("Failed to set OSC checksum flags: %d\n", rc);
 628
 629         return count;
 630 }
 631 LUSTRE_RW_ATTR(checksums);
 632
 633 LUSTRE_ATTR(checksum_pages, 0644, checksums_show, checksums_store);
 634
 635 static ssize_t ll_rd_track_id(struct kobject *kobj, char *buf,
 636                               enum stats_track_type type)
 637 {
 638         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 639                                               ll_kset.kobj);
 640
 641         if (sbi->ll_stats_track_type == type)
 642                 return sprintf(buf, "%d\n", sbi->ll_stats_track_id);
 643         else if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
 644                 return sprintf(buf, "0 (all)\n");
 645
 646         return sprintf(buf, "untracked\n");
 647 }
 648
 649 static ssize_t ll_wr_track_id(struct kobject *kobj, const char *buffer,
 650                               size_t count, enum stats_track_type type)
 651 {
 652         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 653                                               ll_kset.kobj);
 654         unsigned long pid;
 655         int rc;
 656
 657         rc = kstrtoul(buffer, 10, &pid);
 658         if (rc)
 659                 return rc;
 660
 661         sbi->ll_stats_track_id = pid;
 662         if (pid == 0)
 663                 sbi->ll_stats_track_type = STATS_TRACK_ALL;
 664         else
 665                 sbi->ll_stats_track_type = type;
 666         lprocfs_clear_stats(sbi->ll_stats);
 667         return count;
 668 }
 669
 670 static ssize_t stats_track_pid_show(struct kobject *kobj,
 671                                     struct attribute *attr,
 672                                     char *buf)
 673 {
 674         return ll_rd_track_id(kobj, buf, STATS_TRACK_PID);
 675 }
 676
 677 static ssize_t stats_track_pid_store(struct kobject *kobj,
 678                                      struct attribute *attr,
 679                                      const char *buffer,
 680                                      size_t count)
 681 {
 682         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PID);
 683 }
 684 LUSTRE_RW_ATTR(stats_track_pid);
 685
 686 static ssize_t stats_track_ppid_show(struct kobject *kobj,
 687                                      struct attribute *attr,
 688                                      char *buf)
 689 {
 690         return ll_rd_track_id(kobj, buf, STATS_TRACK_PPID);
 691 }
 692
 693 static ssize_t stats_track_ppid_store(struct kobject *kobj,
 694                                       struct attribute *attr,
 695                                       const char *buffer,
 696                                       size_t count)
 697 {
 698         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PPID);
 699 }
 700 LUSTRE_RW_ATTR(stats_track_ppid);
 701
 702 static ssize_t stats_track_gid_show(struct kobject *kobj,
 703                                     struct attribute *attr,
 704                                     char *buf)
 705 {
 706         return ll_rd_track_id(kobj, buf, STATS_TRACK_GID);
 707 }
 708
 709 static ssize_t stats_track_gid_store(struct kobject *kobj,
 710                                      struct attribute *attr,
 711                                      const char *buffer,
 712                                      size_t count)
 713 {
 714         return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_GID);
 715 }
 716 LUSTRE_RW_ATTR(stats_track_gid);
 717
 718 static ssize_t statahead_running_max_show(struct kobject *kobj,
 719                                           struct attribute *attr,
 720                                           char *buf)
 721 {
 722         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 723                                               ll_kset.kobj);
 724
 725         return snprintf(buf, 16, "%u\n", sbi->ll_sa_running_max);
 726 }
 727
 728 static ssize_t statahead_running_max_store(struct kobject *kobj,
 729                                            struct attribute *attr,
 730                                            const char *buffer,
 731                                            size_t count)
 732 {
 733         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 734                                               ll_kset.kobj);
 735         unsigned long val;
 736         int rc;
 737
 738         rc = kstrtoul(buffer, 0, &val);
 739         if (rc)
 740                 return rc;
 741
 742         if (val <= LL_SA_RUNNING_MAX) {
 743                 sbi->ll_sa_running_max = val;
 744                 return count;
 745         }
 746
 747         CERROR("Bad statahead_running_max value %lu. Valid values "
 748                "are in the range [0, %d]\n", val, LL_SA_RUNNING_MAX);
 749
 750         return -ERANGE;
 751 }
 752 LUSTRE_RW_ATTR(statahead_running_max);
 753
 754 static ssize_t statahead_max_show(struct kobject *kobj,
 755                                   struct attribute *attr,
 756                                   char *buf)
 757 {
 758         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 759                                               ll_kset.kobj);
 760
 761         return sprintf(buf, "%u\n", sbi->ll_sa_max);
 762 }
 763
 764 static ssize_t statahead_max_store(struct kobject *kobj,
 765                                    struct attribute *attr,
 766                                    const char *buffer,
 767                                    size_t count)
 768 {
 769         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 770                                               ll_kset.kobj);
 771         unsigned long val;
 772         int rc;
 773
 774         rc = kstrtoul(buffer, 0, &val);
 775         if (rc)
 776                 return rc;
 777
 778         if (val <= LL_SA_RPC_MAX)
 779                 sbi->ll_sa_max = val;
 780         else
 781                 CERROR("Bad statahead_max value %lu. Valid values are in the range [0, %d]\n",
 782                        val, LL_SA_RPC_MAX);
 783
 784         return count;
 785 }
 786 LUSTRE_RW_ATTR(statahead_max);
 787
 788 static ssize_t statahead_agl_show(struct kobject *kobj,
 789                                   struct attribute *attr,
 790                                   char *buf)
 791 {
 792         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 793                                               ll_kset.kobj);
 794
 795         return sprintf(buf, "%u\n", sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
 796 }
 797
 798 static ssize_t statahead_agl_store(struct kobject *kobj,
 799                                    struct attribute *attr,
 800                                    const char *buffer,
 801                                    size_t count)
 802 {
 803         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 804                                               ll_kset.kobj);
 805         bool val;
 806         int rc;
 807
 808         rc = kstrtobool(buffer, &val);
 809         if (rc)
 810                 return rc;
 811
 812         if (val)
 813                 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
 814         else
 815                 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
 816
 817         return count;
 818 }
 819 LUSTRE_RW_ATTR(statahead_agl);
 820
 821 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
 822 {
 823         struct super_block *sb = m->private;
 824         struct ll_sb_info *sbi = ll_s2sbi(sb);
 825
 826         seq_printf(m, "statahead total: %u\n"
 827                       "statahead wrong: %u\n"
 828                       "agl total: %u\n",
 829                    atomic_read(&sbi->ll_sa_total),
 830                    atomic_read(&sbi->ll_sa_wrong),
 831                    atomic_read(&sbi->ll_agl_total));
 832         return 0;
 833 }
 834
 835 LDEBUGFS_SEQ_FOPS_RO(ll_statahead_stats);
 836
 837 static ssize_t lazystatfs_show(struct kobject *kobj,
 838                                struct attribute *attr,
 839                                char *buf)
 840 {
 841         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 842                                               ll_kset.kobj);
 843
 844         return sprintf(buf, "%u\n", (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
 845 }
 846
 847 static ssize_t lazystatfs_store(struct kobject *kobj,
 848                                 struct attribute *attr,
 849                                 const char *buffer,
 850                                 size_t count)
 851 {
 852         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 853                                               ll_kset.kobj);
 854         bool val;
 855         int rc;
 856
 857         rc = kstrtobool(buffer, &val);
 858         if (rc)
 859                 return rc;
 860
 861         if (val)
 862                 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
 863         else
 864                 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
 865
 866         return count;
 867 }
 868 LUSTRE_RW_ATTR(lazystatfs);
 869
 870 static ssize_t statfs_max_age_show(struct kobject *kobj, struct attribute *attr,
 871                                    char *buf)
 872 {
 873         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 874                                               ll_kset.kobj);
 875
 876         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_statfs_max_age);
 877 }
 878
 879 static ssize_t statfs_max_age_store(struct kobject *kobj,
 880                                     struct attribute *attr, const char *buffer,
 881                                     size_t count)
 882 {
 883         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 884                                               ll_kset.kobj);
 885         unsigned int val;
 886         int rc;
 887
 888         rc = kstrtouint(buffer, 10, &val);
 889         if (rc)
 890                 return rc;
 891         if (val > OBD_STATFS_CACHE_MAX_AGE)
 892                 return -EINVAL;
 893
 894         sbi->ll_statfs_max_age = val;
 895
 896         return count;
 897 }
 898 LUSTRE_RW_ATTR(statfs_max_age);
 899
 900 static ssize_t max_easize_show(struct kobject *kobj,
 901                                struct attribute *attr,
 902                                char *buf)
 903 {
 904         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 905                                               ll_kset.kobj);
 906         unsigned int ealen;
 907         int rc;
 908
 909         rc = ll_get_max_mdsize(sbi, &ealen);
 910         if (rc)
 911                 return rc;
 912
 913         /* Limit xattr size returned to userspace based on kernel maximum */
 914         return snprintf(buf, PAGE_SIZE, "%u\n",
 915                         ealen > XATTR_SIZE_MAX ? XATTR_SIZE_MAX : ealen);
 916 }
 917 LUSTRE_RO_ATTR(max_easize);
 918
 919 /**
 920  * Get default_easize.
 921  *
 922  * \see client_obd::cl_default_mds_easize
 923  *
 924  * \param[in] m         seq_file handle
 925  * \param[in] v         unused for single entry
 926  *
 927  * \retval 0            on success
 928  * \retval negative     negated errno on failure
 929  */
 930 static ssize_t default_easize_show(struct kobject *kobj,
 931                                    struct attribute *attr,
 932                                    char *buf)
 933 {
 934         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 935                                               ll_kset.kobj);
 936         unsigned int ealen;
 937         int rc;
 938
 939         rc = ll_get_default_mdsize(sbi, &ealen);
 940         if (rc)
 941                 return rc;
 942
 943         /* Limit xattr size returned to userspace based on kernel maximum */
 944         return snprintf(buf, PAGE_SIZE, "%u\n",
 945                         ealen > XATTR_SIZE_MAX ? XATTR_SIZE_MAX : ealen);
 946 }
 947
 948 /**
 949  * Set default_easize.
 950  *
 951  * Range checking on the passed value is handled by
 952  * ll_set_default_mdsize().
 953  *
 954  * \see client_obd::cl_default_mds_easize
 955  *
 956  * \param[in] file      proc file
 957  * \param[in] buffer    string passed from user space
 958  * \param[in] count     \a buffer length
 959  * \param[in] off       unused for single entry
 960  *
 961  * \retval positive     \a count on success
 962  * \retval negative     negated errno on failure
 963  */
 964 static ssize_t default_easize_store(struct kobject *kobj,
 965                                     struct attribute *attr,
 966                                     const char *buffer,
 967                                     size_t count)
 968 {
 969         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
 970                                               ll_kset.kobj);
 971         unsigned int val;
 972         int rc;
 973
 974         if (count == 0)
 975                 return 0;
 976
 977         rc = kstrtouint(buffer, 10, &val);
 978         if (rc)
 979                 return rc;
 980
 981         rc = ll_set_default_mdsize(sbi, val);
 982         if (rc)
 983                 return rc;
 984
 985         return count;
 986 }
 987 LUSTRE_RW_ATTR(default_easize);
 988
 989 static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
 990 {
 991         const char *str[] = LL_SBI_FLAGS;
 992         struct super_block *sb = m->private;
 993         int flags = ll_s2sbi(sb)->ll_flags;
 994         int i = 0;
 995
 996         while (flags != 0) {
 997                 if (ARRAY_SIZE(str) <= i) {
 998                         CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
 999                                 "flags please.\n", ll_s2sbi(sb)->ll_fsname);
1000                         return -EINVAL;
1001                 }
1002
1003                 if (flags & 0x1)
1004                         seq_printf(m, "%s ", str[i]);
1005                 flags >>= 1;
1006                 ++i;
1007         }
1008         seq_printf(m, "\b\n");
1009         return 0;
1010 }
1011
1012 LDEBUGFS_SEQ_FOPS_RO(ll_sbi_flags);
1013
1014 static ssize_t xattr_cache_show(struct kobject *kobj,
1015                                 struct attribute *attr,
1016                                 char *buf)
1017 {
1018         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1019                                               ll_kset.kobj);
1020
1021         return sprintf(buf, "%u\n", sbi->ll_xattr_cache_enabled);
1022 }
1023
1024 static ssize_t xattr_cache_store(struct kobject *kobj,
1025                                  struct attribute *attr,
1026                                  const char *buffer,
1027                                  size_t count)
1028 {
1029         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1030                                               ll_kset.kobj);
1031         bool val;
1032         int rc;
1033
1034         rc = kstrtobool(buffer, &val);
1035         if (rc)
1036                 return rc;
1037
1038         if (val && !(sbi->ll_flags & LL_SBI_XATTR_CACHE))
1039                 return -ENOTSUPP;
1040
1041         sbi->ll_xattr_cache_enabled = val;
1042         sbi->ll_xattr_cache_set = 1;
1043
1044         return count;
1045 }
1046 LUSTRE_RW_ATTR(xattr_cache);
1047
1048 static ssize_t tiny_write_show(struct kobject *kobj,
1049                                struct attribute *attr,
1050                                char *buf)
1051 {
1052         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1053                                               ll_kset.kobj);
1054
1055         return sprintf(buf, "%u\n", !!(sbi->ll_flags & LL_SBI_TINY_WRITE));
1056 }
1057
1058 static ssize_t tiny_write_store(struct kobject *kobj,
1059                                 struct attribute *attr,
1060                                 const char *buffer,
1061                                 size_t count)
1062 {
1063         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1064                                               ll_kset.kobj);
1065         bool val;
1066         int rc;
1067
1068         rc = kstrtobool(buffer, &val);
1069         if (rc)
1070                 return rc;
1071
1072         spin_lock(&sbi->ll_lock);
1073         if (val)
1074                 sbi->ll_flags |= LL_SBI_TINY_WRITE;
1075         else
1076                 sbi->ll_flags &= ~LL_SBI_TINY_WRITE;
1077         spin_unlock(&sbi->ll_lock);
1078
1079         return count;
1080 }
1081 LUSTRE_RW_ATTR(tiny_write);
1082
1083 static ssize_t max_read_ahead_async_active_show(struct kobject *kobj,
1084                                                struct attribute *attr,
1085                                                char *buf)
1086 {
1087         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1088                                               ll_kset.kobj);
1089
1090         return snprintf(buf, PAGE_SIZE, "%u\n",
1091                         sbi->ll_ra_info.ra_async_max_active);
1092 }
1093
1094 static ssize_t max_read_ahead_async_active_store(struct kobject *kobj,
1095                                                  struct attribute *attr,
1096                                                  const char *buffer,
1097                                                  size_t count)
1098 {
1099         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1100                                               ll_kset.kobj);
1101         unsigned int val;
1102         int rc;
1103
1104         rc = kstrtouint(buffer, 10, &val);
1105         if (rc)
1106                 return rc;
1107
1108         if (val < 1 || val > WQ_UNBOUND_MAX_ACTIVE) {
1109                 CERROR("%s: cannot set max_read_ahead_async_active=%u %s than %u\n",
1110                        sbi->ll_fsname, val,
1111                        val < 1 ? "smaller" : "larger",
1112                        val < 1 ? 1 : WQ_UNBOUND_MAX_ACTIVE);
1113                 return -ERANGE;
1114         }
1115
1116         spin_lock(&sbi->ll_lock);
1117         sbi->ll_ra_info.ra_async_max_active = val;
1118         spin_unlock(&sbi->ll_lock);
1119         workqueue_set_max_active(sbi->ll_ra_info.ll_readahead_wq, val);
1120
1121         return count;
1122 }
1123 LUSTRE_RW_ATTR(max_read_ahead_async_active);
1124
1125 static ssize_t read_ahead_async_file_threshold_mb_show(struct kobject *kobj,
1126                                                        struct attribute *attr,
1127                                                        char *buf)
1128 {
1129         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1130                                               ll_kset.kobj);
1131
1132         return snprintf(buf, PAGE_SIZE, "%lu\n",
1133              PAGES_TO_MiB(sbi->ll_ra_info.ra_async_pages_per_file_threshold));
1134 }
1135
1136 static ssize_t
1137 read_ahead_async_file_threshold_mb_store(struct kobject *kobj,
1138                                          struct attribute *attr,
1139                                          const char *buffer, size_t count)
1140 {
1141         unsigned long pages_number;
1142         unsigned long max_ra_per_file;
1143         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1144                                               ll_kset.kobj);
1145         int rc;
1146
1147         rc = kstrtoul(buffer, 10, &pages_number);
1148         if (rc)
1149                 return rc;
1150
1151         pages_number = MiB_TO_PAGES(pages_number);
1152         max_ra_per_file = sbi->ll_ra_info.ra_max_pages_per_file;
1153         if (pages_number < 0 || pages_number > max_ra_per_file) {
1154                 CERROR("%s: can't set read_ahead_async_file_threshold_mb=%lu > "
1155                        "max_read_readahead_per_file_mb=%lu\n", sbi->ll_fsname,
1156                        PAGES_TO_MiB(pages_number),
1157                        PAGES_TO_MiB(max_ra_per_file));
1158                 return -ERANGE;
1159         }
1160         sbi->ll_ra_info.ra_async_pages_per_file_threshold = pages_number;
1161
1162         return count;
1163 }
1164 LUSTRE_RW_ATTR(read_ahead_async_file_threshold_mb);
1165
1166 static ssize_t fast_read_show(struct kobject *kobj,
1167                               struct attribute *attr,
1168                               char *buf)
1169 {
1170         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1171                                               ll_kset.kobj);
1172
1173         return sprintf(buf, "%u\n", !!(sbi->ll_flags & LL_SBI_FAST_READ));
1174 }
1175
1176 static ssize_t fast_read_store(struct kobject *kobj,
1177                                struct attribute *attr,
1178                                const char *buffer,
1179                                size_t count)
1180 {
1181         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1182                                               ll_kset.kobj);
1183         bool val;
1184         int rc;
1185
1186         rc = kstrtobool(buffer, &val);
1187         if (rc)
1188                 return rc;
1189
1190         spin_lock(&sbi->ll_lock);
1191         if (val)
1192                 sbi->ll_flags |= LL_SBI_FAST_READ;
1193         else
1194                 sbi->ll_flags &= ~LL_SBI_FAST_READ;
1195         spin_unlock(&sbi->ll_lock);
1196
1197         return count;
1198 }
1199 LUSTRE_RW_ATTR(fast_read);
1200
1201 static ssize_t file_heat_show(struct kobject *kobj,
1202                               struct attribute *attr,
1203                               char *buf)
1204 {
1205         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1206                                               ll_kset.kobj);
1207
1208         return snprintf(buf, PAGE_SIZE, "%u\n",
1209                         !!(sbi->ll_flags & LL_SBI_FILE_HEAT));
1210 }
1211
1212 static ssize_t file_heat_store(struct kobject *kobj,
1213                                struct attribute *attr,
1214                                const char *buffer,
1215                                size_t count)
1216 {
1217         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1218                                               ll_kset.kobj);
1219         bool val;
1220         int rc;
1221
1222         rc = kstrtobool(buffer, &val);
1223         if (rc)
1224                 return rc;
1225
1226         spin_lock(&sbi->ll_lock);
1227         if (val)
1228                 sbi->ll_flags |= LL_SBI_FILE_HEAT;
1229         else
1230                 sbi->ll_flags &= ~LL_SBI_FILE_HEAT;
1231         spin_unlock(&sbi->ll_lock);
1232
1233         return count;
1234 }
1235 LUSTRE_RW_ATTR(file_heat);
1236
1237 static ssize_t heat_decay_percentage_show(struct kobject *kobj,
1238                                           struct attribute *attr,
1239                                           char *buf)
1240 {
1241         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1242                                               ll_kset.kobj);
1243
1244         return snprintf(buf, PAGE_SIZE, "%u\n",
1245                        (sbi->ll_heat_decay_weight * 100 + 128) / 256);
1246 }
1247
1248 static ssize_t heat_decay_percentage_store(struct kobject *kobj,
1249                                            struct attribute *attr,
1250                                            const char *buffer,
1251                                            size_t count)
1252 {
1253         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1254                                               ll_kset.kobj);
1255         unsigned long val;
1256         int rc;
1257
1258         rc = kstrtoul(buffer, 10, &val);
1259         if (rc)
1260                 return rc;
1261
1262         if (val < 0 || val > 100)
1263                 return -ERANGE;
1264
1265         sbi->ll_heat_decay_weight = (val * 256 + 50) / 100;
1266
1267         return count;
1268 }
1269 LUSTRE_RW_ATTR(heat_decay_percentage);
1270
1271 static ssize_t heat_period_second_show(struct kobject *kobj,
1272                                        struct attribute *attr,
1273                                        char *buf)
1274 {
1275         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1276                                               ll_kset.kobj);
1277
1278         return snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_heat_period_second);
1279 }
1280
1281 static ssize_t heat_period_second_store(struct kobject *kobj,
1282                                         struct attribute *attr,
1283                                         const char *buffer,
1284                                         size_t count)
1285 {
1286         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1287                                               ll_kset.kobj);
1288         unsigned long val;
1289         int rc;
1290
1291         rc = kstrtoul(buffer, 10, &val);
1292         if (rc)
1293                 return rc;
1294
1295         if (val <= 0)
1296                 return -ERANGE;
1297
1298         sbi->ll_heat_period_second = val;
1299
1300         return count;
1301 }
1302 LUSTRE_RW_ATTR(heat_period_second);
1303
1304 static int ll_unstable_stats_seq_show(struct seq_file *m, void *v)
1305 {
1306         struct super_block      *sb    = m->private;
1307         struct ll_sb_info       *sbi   = ll_s2sbi(sb);
1308         struct cl_client_cache  *cache = sbi->ll_cache;
1309         long pages;
1310         int mb;
1311
1312         pages = atomic_long_read(&cache->ccc_unstable_nr);
1313         mb    = (pages * PAGE_SIZE) >> 20;
1314
1315         seq_printf(m, "unstable_check:     %8d\n"
1316                       "unstable_pages: %12ld\n"
1317                       "unstable_mb:        %8d\n",
1318                    cache->ccc_unstable_check, pages, mb);
1319         return 0;
1320 }
1321
1322 static ssize_t ll_unstable_stats_seq_write(struct file *file,
1323                                            const char __user *buffer,
1324                                            size_t count, loff_t *unused)
1325 {
1326         struct seq_file *seq = file->private_data;
1327         struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)seq->private);
1328         char kernbuf[128];
1329         bool val;
1330         int rc;
1331
1332         if (count == 0)
1333                 return 0;
1334         if (count >= sizeof(kernbuf))
1335                 return -EINVAL;
1336
1337         if (copy_from_user(kernbuf, buffer, count))
1338                 return -EFAULT;
1339         kernbuf[count] = 0;
1340
1341         buffer += lprocfs_find_named_value(kernbuf, "unstable_check:", &count) -
1342                   kernbuf;
1343         rc = kstrtobool_from_user(buffer, count, &val);
1344         if (rc < 0)
1345                 return rc;
1346
1347         /* borrow lru lock to set the value */
1348         spin_lock(&sbi->ll_cache->ccc_lru_lock);
1349         sbi->ll_cache->ccc_unstable_check = val;
1350         spin_unlock(&sbi->ll_cache->ccc_lru_lock);
1351
1352         return count;
1353 }
1354
1355 LDEBUGFS_SEQ_FOPS(ll_unstable_stats);
1356
1357 static int ll_root_squash_seq_show(struct seq_file *m, void *v)
1358 {
1359         struct super_block *sb = m->private;
1360         struct ll_sb_info *sbi = ll_s2sbi(sb);
1361         struct root_squash_info *squash = &sbi->ll_squash;
1362
1363         seq_printf(m, "%u:%u\n", squash->rsi_uid, squash->rsi_gid);
1364         return 0;
1365 }
1366
1367 static ssize_t ll_root_squash_seq_write(struct file *file,
1368                                         const char __user *buffer,
1369                                         size_t count, loff_t *off)
1370 {
1371         struct seq_file *m = file->private_data;
1372         struct super_block *sb = m->private;
1373         struct ll_sb_info *sbi = ll_s2sbi(sb);
1374         struct root_squash_info *squash = &sbi->ll_squash;
1375
1376         return lprocfs_wr_root_squash(buffer, count, squash, sbi->ll_fsname);
1377 }
1378
1379 LDEBUGFS_SEQ_FOPS(ll_root_squash);
1380
1381 static int ll_nosquash_nids_seq_show(struct seq_file *m, void *v)
1382 {
1383         struct super_block *sb = m->private;
1384         struct ll_sb_info *sbi = ll_s2sbi(sb);
1385         struct root_squash_info *squash = &sbi->ll_squash;
1386         int len;
1387
1388         spin_lock(&squash->rsi_lock);
1389         if (!list_empty(&squash->rsi_nosquash_nids)) {
1390                 len = cfs_print_nidlist(m->buf + m->count, m->size - m->count,
1391                                         &squash->rsi_nosquash_nids);
1392                 m->count += len;
1393                 seq_putc(m, '\n');
1394         } else {
1395                 seq_puts(m, "NONE\n");
1396         }
1397         spin_unlock(&squash->rsi_lock);
1398
1399         return 0;
1400 }
1401
1402 static ssize_t ll_nosquash_nids_seq_write(struct file *file,
1403                                           const char __user *buffer,
1404                                           size_t count, loff_t *off)
1405 {
1406         struct seq_file *m = file->private_data;
1407         struct super_block *sb = m->private;
1408         struct ll_sb_info *sbi = ll_s2sbi(sb);
1409         struct root_squash_info *squash = &sbi->ll_squash;
1410         int rc;
1411
1412         rc = lprocfs_wr_nosquash_nids(buffer, count, squash, sbi->ll_fsname);
1413         if (rc < 0)
1414                 return rc;
1415
1416         ll_compute_rootsquash_state(sbi);
1417
1418         return rc;
1419 }
1420
1421 LDEBUGFS_SEQ_FOPS(ll_nosquash_nids);
1422
1423 static int ll_pcc_seq_show(struct seq_file *m, void *v)
1424 {
1425         struct super_block *sb = m->private;
1426         struct ll_sb_info *sbi = ll_s2sbi(sb);
1427
1428         return pcc_super_dump(&sbi->ll_pcc_super, m);
1429 }
1430
1431 static ssize_t ll_pcc_seq_write(struct file *file, const char __user *buffer,
1432                                 size_t count, loff_t *off)
1433 {
1434         struct seq_file *m = file->private_data;
1435         struct super_block *sb = m->private;
1436         struct ll_sb_info *sbi = ll_s2sbi(sb);
1437         int rc;
1438         char *kernbuf;
1439
1440         if (count >= LPROCFS_WR_PCC_MAX_CMD)
1441                 return -EINVAL;
1442
1443         if (!(exp_connect_flags2(sbi->ll_md_exp) & OBD_CONNECT2_PCC))
1444                 return -EOPNOTSUPP;
1445
1446         OBD_ALLOC(kernbuf, count + 1);
1447         if (kernbuf == NULL)
1448                 return -ENOMEM;
1449
1450         if (copy_from_user(kernbuf, buffer, count))
1451                 GOTO(out_free_kernbuff, rc = -EFAULT);
1452
1453         rc = pcc_cmd_handle(kernbuf, count, &sbi->ll_pcc_super);
1454 out_free_kernbuff:
1455         OBD_FREE(kernbuf, count + 1);
1456         return rc ? rc : count;
1457 }
1458 LPROC_SEQ_FOPS(ll_pcc);
1459
1460 struct lprocfs_vars lprocfs_llite_obd_vars[] = {
1461         { .name =       "site",
1462           .fops =       &ll_site_stats_fops                     },
1463         { .name =       "max_cached_mb",
1464           .fops =       &ll_max_cached_mb_fops                  },
1465         { .name =       "statahead_stats",
1466           .fops =       &ll_statahead_stats_fops                },
1467         { .name =       "unstable_stats",
1468           .fops =       &ll_unstable_stats_fops                 },
1469         { .name =       "sbi_flags",
1470           .fops =       &ll_sbi_flags_fops                      },
1471         { .name =       "root_squash",
1472           .fops =       &ll_root_squash_fops                    },
1473         { .name =       "nosquash_nids",
1474           .fops =       &ll_nosquash_nids_fops                  },
1475         { .name =       "pcc",
1476           .fops =       &ll_pcc_fops,                           },
1477         { NULL }
1478 };
1479
1480 #define MAX_STRING_SIZE 128
1481
1482 static struct attribute *llite_attrs[] = {
1483         &lustre_attr_blocksize.attr,
1484         &lustre_attr_stat_blocksize.attr,
1485         &lustre_attr_kbytestotal.attr,
1486         &lustre_attr_kbytesfree.attr,
1487         &lustre_attr_kbytesavail.attr,
1488         &lustre_attr_filestotal.attr,
1489         &lustre_attr_filesfree.attr,
1490         &lustre_attr_client_type.attr,
1491         &lustre_attr_fstype.attr,
1492         &lustre_attr_uuid.attr,
1493         &lustre_attr_checksums.attr,
1494         &lustre_attr_checksum_pages.attr,
1495         &lustre_attr_max_read_ahead_mb.attr,
1496         &lustre_attr_max_read_ahead_per_file_mb.attr,
1497         &lustre_attr_max_read_ahead_whole_mb.attr,
1498         &lustre_attr_max_read_ahead_async_active.attr,
1499         &lustre_attr_read_ahead_async_file_threshold_mb.attr,
1500         &lustre_attr_stats_track_pid.attr,
1501         &lustre_attr_stats_track_ppid.attr,
1502         &lustre_attr_stats_track_gid.attr,
1503         &lustre_attr_statahead_running_max.attr,
1504         &lustre_attr_statahead_max.attr,
1505         &lustre_attr_statahead_agl.attr,
1506         &lustre_attr_lazystatfs.attr,
1507         &lustre_attr_statfs_max_age.attr,
1508         &lustre_attr_max_easize.attr,
1509         &lustre_attr_default_easize.attr,
1510         &lustre_attr_xattr_cache.attr,
1511         &lustre_attr_fast_read.attr,
1512         &lustre_attr_tiny_write.attr,
1513         &lustre_attr_file_heat.attr,
1514         &lustre_attr_heat_decay_percentage.attr,
1515         &lustre_attr_heat_period_second.attr,
1516         NULL,
1517 };
1518
1519 static void sbi_kobj_release(struct kobject *kobj)
1520 {
1521         struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1522                                               ll_kset.kobj);
1523         complete(&sbi->ll_kobj_unregister);
1524 }
1525
1526 static struct kobj_type sbi_ktype = {
1527         .default_attrs  = llite_attrs,
1528         .sysfs_ops      = &lustre_sysfs_ops,
1529         .release        = sbi_kobj_release,
1530 };
1531
1532 #define LPROCFS_TYPE_LATENCY \
1533         (LPROCFS_TYPE_USEC | LPROCFS_CNTR_AVGMINMAX | LPROCFS_CNTR_STDDEV)
1534 static const struct llite_file_opcode {
1535         __u32           opcode;
1536         __u32           type;
1537         const char      *opname;
1538 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
1539         /* file operation */
1540         { LPROC_LL_READ_BYTES,  LPROCFS_CNTR_AVGMINMAX | LPROCFS_TYPE_BYTES,
1541                 "read_bytes" },
1542         { LPROC_LL_WRITE_BYTES, LPROCFS_CNTR_AVGMINMAX | LPROCFS_TYPE_BYTES,
1543                 "write_bytes" },
1544         { LPROC_LL_READ,        LPROCFS_TYPE_LATENCY,   "read" },
1545         { LPROC_LL_WRITE,       LPROCFS_TYPE_LATENCY,   "write" },
1546         { LPROC_LL_IOCTL,       LPROCFS_TYPE_REQS,      "ioctl" },
1547         { LPROC_LL_OPEN,        LPROCFS_TYPE_LATENCY,   "open" },
1548         { LPROC_LL_RELEASE,     LPROCFS_TYPE_LATENCY,   "close" },
1549         { LPROC_LL_MMAP,        LPROCFS_TYPE_LATENCY,   "mmap" },
1550         { LPROC_LL_FAULT,       LPROCFS_TYPE_LATENCY,   "page_fault" },
1551         { LPROC_LL_MKWRITE,     LPROCFS_TYPE_LATENCY,   "page_mkwrite" },
1552         { LPROC_LL_LLSEEK,      LPROCFS_TYPE_LATENCY,   "seek" },
1553         { LPROC_LL_FSYNC,       LPROCFS_TYPE_LATENCY,   "fsync" },
1554         { LPROC_LL_READDIR,     LPROCFS_TYPE_LATENCY,   "readdir" },
1555         /* inode operation */
1556         { LPROC_LL_SETATTR,     LPROCFS_TYPE_LATENCY,   "setattr" },
1557         { LPROC_LL_TRUNC,       LPROCFS_TYPE_LATENCY,   "truncate" },
1558         { LPROC_LL_FLOCK,       LPROCFS_TYPE_LATENCY,   "flock" },
1559         { LPROC_LL_GETATTR,     LPROCFS_TYPE_LATENCY,   "getattr" },
1560         /* dir inode operation */
1561         { LPROC_LL_CREATE,      LPROCFS_TYPE_LATENCY,   "create" },
1562         { LPROC_LL_LINK,        LPROCFS_TYPE_LATENCY,   "link" },
1563         { LPROC_LL_UNLINK,      LPROCFS_TYPE_LATENCY,   "unlink" },
1564         { LPROC_LL_SYMLINK,     LPROCFS_TYPE_LATENCY,   "symlink" },
1565         { LPROC_LL_MKDIR,       LPROCFS_TYPE_LATENCY,   "mkdir" },
1566         { LPROC_LL_RMDIR,       LPROCFS_TYPE_LATENCY,   "rmdir" },
1567         { LPROC_LL_MKNOD,       LPROCFS_TYPE_LATENCY,   "mknod" },
1568         { LPROC_LL_RENAME,      LPROCFS_TYPE_LATENCY,   "rename" },
1569         /* special inode operation */
1570         { LPROC_LL_STATFS,      LPROCFS_TYPE_LATENCY,   "statfs" },
1571         { LPROC_LL_SETXATTR,    LPROCFS_TYPE_LATENCY,   "setxattr" },
1572         { LPROC_LL_GETXATTR,    LPROCFS_TYPE_LATENCY,   "getxattr" },
1573         { LPROC_LL_GETXATTR_HITS, LPROCFS_TYPE_REQS,    "getxattr_hits" },
1574         { LPROC_LL_LISTXATTR,   LPROCFS_TYPE_LATENCY,   "listxattr" },
1575         { LPROC_LL_REMOVEXATTR, LPROCFS_TYPE_LATENCY,   "removexattr" },
1576         { LPROC_LL_INODE_PERM,  LPROCFS_TYPE_LATENCY,   "inode_permission" },
1577 };
1578
1579 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, long count)
1580 {
1581         if (!sbi->ll_stats)
1582                 return;
1583
1584         if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
1585                 lprocfs_counter_add(sbi->ll_stats, op, count);
1586         else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
1587                  sbi->ll_stats_track_id == current->pid)
1588                 lprocfs_counter_add(sbi->ll_stats, op, count);
1589         else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
1590                  sbi->ll_stats_track_id == current->parent->pid)
1591                 lprocfs_counter_add(sbi->ll_stats, op, count);
1592         else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
1593                  sbi->ll_stats_track_id ==
1594                         from_kgid(&init_user_ns, current_gid()))
1595                 lprocfs_counter_add(sbi->ll_stats, op, count);
1596 }
1597 EXPORT_SYMBOL(ll_stats_ops_tally);
1598
1599 static const char *ra_stat_string[] = {
1600         [RA_STAT_HIT] = "hits",
1601         [RA_STAT_MISS] = "misses",
1602         [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
1603         [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
1604         [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
1605         [RA_STAT_FAILED_MATCH] = "failed lock match",
1606         [RA_STAT_DISCARDED] = "read but discarded",
1607         [RA_STAT_ZERO_LEN] = "zero length file",
1608         [RA_STAT_ZERO_WINDOW] = "zero size window",
1609         [RA_STAT_EOF] = "read-ahead to EOF",
1610         [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
1611         [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
1612         [RA_STAT_FAILED_REACH_END] = "failed to reach end",
1613         [RA_STAT_ASYNC] = "async readahead",
1614         [RA_STAT_FAILED_FAST_READ] = "failed to fast read",
1615 };
1616
1617 int ll_debugfs_register_super(struct super_block *sb, const char *name)
1618 {
1619         struct lustre_sb_info *lsi = s2lsi(sb);
1620         struct ll_sb_info *sbi = ll_s2sbi(sb);
1621         int err, id, rc;
1622
1623         ENTRY;
1624         LASSERT(sbi);
1625
1626         if (IS_ERR_OR_NULL(llite_root))
1627                 goto out_ll_kset;
1628
1629         sbi->ll_debugfs_entry = ldebugfs_register(name, llite_root,
1630                                                   lprocfs_llite_obd_vars, sb);
1631         if (IS_ERR_OR_NULL(sbi->ll_debugfs_entry)) {
1632                 err = sbi->ll_debugfs_entry ? PTR_ERR(sbi->ll_debugfs_entry) :
1633                                               -ENOMEM;
1634                 sbi->ll_debugfs_entry = NULL;
1635                 RETURN(err);
1636         }
1637
1638         rc = ldebugfs_seq_create(sbi->ll_debugfs_entry, "dump_page_cache",0444,
1639                                  &vvp_dump_pgcache_file_ops, sbi);
1640         if (rc)
1641                 CWARN("Error adding the dump_page_cache file\n");
1642
1643         rc = ldebugfs_seq_create(sbi->ll_debugfs_entry, "extents_stats", 0644,
1644                                  &ll_rw_extents_stats_fops, sbi);
1645         if (rc)
1646                 CWARN("Error adding the extent_stats file\n");
1647
1648         rc = ldebugfs_seq_create(sbi->ll_debugfs_entry,
1649                                  "extents_stats_per_process", 0644,
1650                                  &ll_rw_extents_stats_pp_fops, sbi);
1651         if (rc)
1652                 CWARN("Error adding the extents_stats_per_process file\n");
1653
1654         rc = ldebugfs_seq_create(sbi->ll_debugfs_entry, "offset_stats", 0644,
1655                                  &ll_rw_offset_stats_fops, sbi);
1656         if (rc)
1657                 CWARN("Error adding the offset_stats file\n");
1658
1659         /* File operations stats */
1660         sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
1661                                             LPROCFS_STATS_FLAG_NONE);
1662         if (sbi->ll_stats == NULL)
1663                 GOTO(out_debugfs, err = -ENOMEM);
1664
1665         /* do counter init */
1666         for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
1667                 u32 type = llite_opcode_table[id].type;
1668                 void *ptr = NULL;
1669
1670                 if (type & LPROCFS_TYPE_REQS)
1671                         ptr = "reqs";
1672                 else if (type & LPROCFS_TYPE_BYTES)
1673                         ptr = "bytes";
1674                 else if (type & LPROCFS_TYPE_PAGES)
1675                         ptr = "pages";
1676                 else if (type & LPROCFS_TYPE_USEC)
1677                         ptr = "usec";
1678                 lprocfs_counter_init(sbi->ll_stats,
1679                                      llite_opcode_table[id].opcode,
1680                                      (type & LPROCFS_CNTR_AVGMINMAX),
1681                                      llite_opcode_table[id].opname, ptr);
1682         }
1683
1684         err = ldebugfs_register_stats(sbi->ll_debugfs_entry, "stats",
1685                                       sbi->ll_stats);
1686         if (err)
1687                 GOTO(out_stats, err);
1688
1689         sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1690                                                LPROCFS_STATS_FLAG_NONE);
1691         if (sbi->ll_ra_stats == NULL)
1692                 GOTO(out_stats, err = -ENOMEM);
1693
1694         for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1695                 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
1696                                      ra_stat_string[id], "pages");
1697
1698         err = ldebugfs_register_stats(sbi->ll_debugfs_entry, "read_ahead_stats",
1699                                       sbi->ll_ra_stats);
1700         if (err)
1701                 GOTO(out_ra_stats, err);
1702
1703 out_ll_kset:
1704         /* Yes we also register sysfs mount kset here as well */
1705         sbi->ll_kset.kobj.parent = llite_kobj;
1706         sbi->ll_kset.kobj.ktype = &sbi_ktype;
1707         init_completion(&sbi->ll_kobj_unregister);
1708         err = kobject_set_name(&sbi->ll_kset.kobj, "%s", name);
1709         if (err)
1710                 GOTO(out_ra_stats, err);
1711
1712         err = kset_register(&sbi->ll_kset);
1713         if (err)
1714                 GOTO(out_ra_stats, err);
1715
1716         lsi->lsi_kobj = kobject_get(&sbi->ll_kset.kobj);
1717
1718         RETURN(0);
1719 out_ra_stats:
1720         lprocfs_free_stats(&sbi->ll_ra_stats);
1721 out_stats:
1722         lprocfs_free_stats(&sbi->ll_stats);
1723 out_debugfs:
1724         debugfs_remove_recursive(sbi->ll_debugfs_entry);
1725
1726         RETURN(err);
1727 }
1728
1729 void ll_debugfs_unregister_super(struct super_block *sb)
1730 {
1731         struct lustre_sb_info *lsi = s2lsi(sb);
1732         struct ll_sb_info *sbi = ll_s2sbi(sb);
1733
1734         debugfs_remove_recursive(sbi->ll_debugfs_entry);
1735
1736         if (sbi->ll_dt_obd)
1737                 sysfs_remove_link(&sbi->ll_kset.kobj,
1738                                   sbi->ll_dt_obd->obd_type->typ_name);
1739
1740         if (sbi->ll_md_obd)
1741                 sysfs_remove_link(&sbi->ll_kset.kobj,
1742                                   sbi->ll_md_obd->obd_type->typ_name);
1743
1744         kobject_put(lsi->lsi_kobj);
1745
1746         kset_unregister(&sbi->ll_kset);
1747         wait_for_completion(&sbi->ll_kobj_unregister);
1748
1749         lprocfs_free_stats(&sbi->ll_ra_stats);
1750         lprocfs_free_stats(&sbi->ll_stats);
1751 }
1752 #undef MAX_STRING_SIZE
1753
1754 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1755                                    struct seq_file *seq, int which)
1756 {
1757         unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1758         unsigned long start, end, r, w;
1759         char *unitp = "KMGTPEZY";
1760         int i, units = 10;
1761         struct per_process_info *pp_info = &io_extents->pp_extents[which];
1762
1763         read_cum = 0;
1764         write_cum = 0;
1765         start = 0;
1766
1767         for(i = 0; i < LL_HIST_MAX; i++) {
1768                 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1769                 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1770         }
1771
1772         for(i = 0; i < LL_HIST_MAX; i++) {
1773                 r = pp_info->pp_r_hist.oh_buckets[i];
1774                 w = pp_info->pp_w_hist.oh_buckets[i];
1775                 read_cum += r;
1776                 write_cum += w;
1777                 end = BIT(i + LL_HIST_START - units);
1778                 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4u %4u  | "
1779                            "%14lu %4u %4u\n", start, *unitp, end, *unitp,
1780                            (i == LL_HIST_MAX - 1) ? '+' : ' ',
1781                            r, pct(r, read_tot), pct(read_cum, read_tot),
1782                            w, pct(w, write_tot), pct(write_cum, write_tot));
1783                 start = end;
1784                 if (start == BIT(10)) {
1785                         start = 1;
1786                         units += 10;
1787                         unitp++;
1788                 }
1789                 if (read_cum == read_tot && write_cum == write_tot)
1790                         break;
1791         }
1792 }
1793
1794 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1795 {
1796         struct timespec64 now;
1797         struct ll_sb_info *sbi = seq->private;
1798         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1799         int k;
1800
1801         ktime_get_real_ts64(&now);
1802
1803         if (!sbi->ll_rw_stats_on) {
1804                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
1805                 return 0;
1806         }
1807         seq_printf(seq, "snapshot_time:         %llu.%09lu (secs.nsecs)\n",
1808                    (s64)now.tv_sec, now.tv_nsec);
1809         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1810         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1811                    "extents", "calls", "%", "cum%",
1812                    "calls", "%", "cum%");
1813         spin_lock(&sbi->ll_pp_extent_lock);
1814         for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1815                 if (io_extents->pp_extents[k].pid != 0) {
1816                         seq_printf(seq, "\nPID: %d\n",
1817                                    io_extents->pp_extents[k].pid);
1818                         ll_display_extents_info(io_extents, seq, k);
1819                 }
1820         }
1821         spin_unlock(&sbi->ll_pp_extent_lock);
1822         return 0;
1823 }
1824
1825 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1826                                                 const char __user *buf,
1827                                                 size_t len,
1828                                                 loff_t *off)
1829 {
1830         struct seq_file *seq = file->private_data;
1831         struct ll_sb_info *sbi = seq->private;
1832         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1833         int i;
1834         __s64 value;
1835
1836         if (len == 0)
1837                 return -EINVAL;
1838
1839         value = ll_stats_pid_write(buf, len);
1840
1841         if (value == 0)
1842                 sbi->ll_rw_stats_on = 0;
1843         else
1844                 sbi->ll_rw_stats_on = 1;
1845
1846         spin_lock(&sbi->ll_pp_extent_lock);
1847         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1848                 io_extents->pp_extents[i].pid = 0;
1849                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1850                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1851         }
1852         spin_unlock(&sbi->ll_pp_extent_lock);
1853         return len;
1854 }
1855
1856 LDEBUGFS_SEQ_FOPS(ll_rw_extents_stats_pp);
1857
1858 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1859 {
1860         struct timespec64 now;
1861         struct ll_sb_info *sbi = seq->private;
1862         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1863
1864         ktime_get_real_ts64(&now);
1865
1866         if (!sbi->ll_rw_stats_on) {
1867                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
1868                 return 0;
1869         }
1870         seq_printf(seq, "snapshot_time:         %llu.%09lu (secs.nsecs)\n",
1871                    (s64)now.tv_sec, now.tv_nsec);
1872
1873         seq_printf(seq, "%15s %19s       | %20s\n", " ", "read", "write");
1874         seq_printf(seq, "%13s   %14s %4s %4s  | %14s %4s %4s\n",
1875                    "extents", "calls", "%", "cum%",
1876                    "calls", "%", "cum%");
1877         spin_lock(&sbi->ll_lock);
1878         ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1879         spin_unlock(&sbi->ll_lock);
1880
1881         return 0;
1882 }
1883
1884 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
1885                                              const char __user *buf,
1886                                              size_t len, loff_t *off)
1887 {
1888         struct seq_file *seq = file->private_data;
1889         struct ll_sb_info *sbi = seq->private;
1890         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1891         int i;
1892         __s64 value;
1893
1894         if (len == 0)
1895                 return -EINVAL;
1896
1897         value = ll_stats_pid_write(buf, len);
1898
1899         if (value == 0)
1900                 sbi->ll_rw_stats_on = 0;
1901         else
1902                 sbi->ll_rw_stats_on = 1;
1903
1904         spin_lock(&sbi->ll_pp_extent_lock);
1905         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1906                 io_extents->pp_extents[i].pid = 0;
1907                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1908                 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1909         }
1910         spin_unlock(&sbi->ll_pp_extent_lock);
1911
1912         return len;
1913 }
1914
1915 LDEBUGFS_SEQ_FOPS(ll_rw_extents_stats);
1916
1917 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1918                        struct ll_file_data *file, loff_t pos,
1919                        size_t count, int rw)
1920 {
1921         int i, cur = -1;
1922         struct ll_rw_process_info *process;
1923         struct ll_rw_process_info *offset;
1924         int *off_count = &sbi->ll_rw_offset_entry_count;
1925         int *process_count = &sbi->ll_offset_process_count;
1926         struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1927
1928         if(!sbi->ll_rw_stats_on)
1929                 return;
1930         process = sbi->ll_rw_process_info;
1931         offset = sbi->ll_rw_offset_info;
1932
1933         spin_lock(&sbi->ll_pp_extent_lock);
1934         /* Extent statistics */
1935         for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1936                 if(io_extents->pp_extents[i].pid == pid) {
1937                         cur = i;
1938                         break;
1939                 }
1940         }
1941
1942         if (cur == -1) {
1943                 /* new process */
1944                 sbi->ll_extent_process_count =
1945                         (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1946                 cur = sbi->ll_extent_process_count;
1947                 io_extents->pp_extents[cur].pid = pid;
1948                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1949                 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1950         }
1951
1952         for (i = 0; (count >= BIT(LL_HIST_START + i)) &&
1953              (i < (LL_HIST_MAX - 1)); i++);
1954         if (rw == 0) {
1955                 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1956                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1957         } else {
1958                 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1959                 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1960         }
1961         spin_unlock(&sbi->ll_pp_extent_lock);
1962
1963         spin_lock(&sbi->ll_process_lock);
1964         /* Offset statistics */
1965         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1966                 if (process[i].rw_pid == pid) {
1967                         if (process[i].rw_last_file != file) {
1968                                 process[i].rw_range_start = pos;
1969                                 process[i].rw_last_file_pos = pos + count;
1970                                 process[i].rw_smallest_extent = count;
1971                                 process[i].rw_largest_extent = count;
1972                                 process[i].rw_offset = 0;
1973                                 process[i].rw_last_file = file;
1974                                 spin_unlock(&sbi->ll_process_lock);
1975                                 return;
1976                         }
1977                         if (process[i].rw_last_file_pos != pos) {
1978                                 *off_count =
1979                                     (*off_count + 1) % LL_OFFSET_HIST_MAX;
1980                                 offset[*off_count].rw_op = process[i].rw_op;
1981                                 offset[*off_count].rw_pid = pid;
1982                                 offset[*off_count].rw_range_start =
1983                                         process[i].rw_range_start;
1984                                 offset[*off_count].rw_range_end =
1985                                         process[i].rw_last_file_pos;
1986                                 offset[*off_count].rw_smallest_extent =
1987                                         process[i].rw_smallest_extent;
1988                                 offset[*off_count].rw_largest_extent =
1989                                         process[i].rw_largest_extent;
1990                                 offset[*off_count].rw_offset =
1991                                         process[i].rw_offset;
1992                                 process[i].rw_op = rw;
1993                                 process[i].rw_range_start = pos;
1994                                 process[i].rw_smallest_extent = count;
1995                                 process[i].rw_largest_extent = count;
1996                                 process[i].rw_offset = pos -
1997                                         process[i].rw_last_file_pos;
1998                         }
1999                         if(process[i].rw_smallest_extent > count)
2000                                 process[i].rw_smallest_extent = count;
2001                         if(process[i].rw_largest_extent < count)
2002                                 process[i].rw_largest_extent = count;
2003                         process[i].rw_last_file_pos = pos + count;
2004                         spin_unlock(&sbi->ll_process_lock);
2005                         return;
2006                 }
2007         }
2008         *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
2009         process[*process_count].rw_pid = pid;
2010         process[*process_count].rw_op = rw;
2011         process[*process_count].rw_range_start = pos;
2012         process[*process_count].rw_last_file_pos = pos + count;
2013         process[*process_count].rw_smallest_extent = count;
2014         process[*process_count].rw_largest_extent = count;
2015         process[*process_count].rw_offset = 0;
2016         process[*process_count].rw_last_file = file;
2017         spin_unlock(&sbi->ll_process_lock);
2018 }
2019
2020 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
2021 {
2022         struct timespec64 now;
2023         struct ll_sb_info *sbi = seq->private;
2024         struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
2025         struct ll_rw_process_info *process = sbi->ll_rw_process_info;
2026         int i;
2027
2028         ktime_get_real_ts64(&now);
2029
2030         if (!sbi->ll_rw_stats_on) {
2031                 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
2032                 return 0;
2033         }
2034         spin_lock(&sbi->ll_process_lock);
2035
2036         seq_printf(seq, "snapshot_time:         %llu.%09lu (secs.nsecs)\n",
2037                    (s64)now.tv_sec, now.tv_nsec);
2038         seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
2039                    "R/W", "PID", "RANGE START", "RANGE END",
2040                    "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
2041
2042         /* We stored the discontiguous offsets here; print them first */
2043         for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
2044                 if (offset[i].rw_pid != 0)
2045                         seq_printf(seq,
2046                                   "%3c %10d %14llu %14llu %17lu %17lu %14lld\n",
2047                                    offset[i].rw_op == READ ? 'R' : 'W',
2048                                    offset[i].rw_pid,
2049                                    offset[i].rw_range_start,
2050                                    offset[i].rw_range_end,
2051                                    (unsigned long)offset[i].rw_smallest_extent,
2052                                    (unsigned long)offset[i].rw_largest_extent,
2053                                    offset[i].rw_offset);
2054         }
2055
2056         /* Then print the current offsets for each process */
2057         for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
2058                 if (process[i].rw_pid != 0)
2059                         seq_printf(seq,
2060                                   "%3c %10d %14llu %14llu %17lu %17lu %14lld\n",
2061                                    process[i].rw_op == READ ? 'R' : 'W',
2062                                    process[i].rw_pid,
2063                                    process[i].rw_range_start,
2064                                    process[i].rw_last_file_pos,
2065                                    (unsigned long)process[i].rw_smallest_extent,
2066                                    (unsigned long)process[i].rw_largest_extent,
2067                                    process[i].rw_offset);
2068         }
2069         spin_unlock(&sbi->ll_process_lock);
2070
2071         return 0;
2072 }
2073
2074 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
2075                                             const char __user *buf,
2076                                             size_t len, loff_t *off)
2077 {
2078         struct seq_file *seq = file->private_data;
2079         struct ll_sb_info *sbi = seq->private;
2080         struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
2081         struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
2082         __s64 value;
2083
2084         if (len == 0)
2085                 return -EINVAL;
2086
2087         value = ll_stats_pid_write(buf, len);
2088
2089         if (value == 0)
2090                 sbi->ll_rw_stats_on = 0;
2091         else
2092                 sbi->ll_rw_stats_on = 1;
2093
2094         spin_lock(&sbi->ll_process_lock);
2095         sbi->ll_offset_process_count = 0;
2096         sbi->ll_rw_offset_entry_count = 0;
2097         memset(process_info, 0, sizeof(struct ll_rw_process_info) *
2098                LL_PROCESS_HIST_MAX);
2099         memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
2100                LL_OFFSET_HIST_MAX);
2101         spin_unlock(&sbi->ll_process_lock);
2102
2103         return len;
2104 }
2105
2106 LDEBUGFS_SEQ_FOPS(ll_rw_offset_stats);