4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.
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).
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
23 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
31 #define DEBUG_SUBSYSTEM S_LLITE
33 #include <linux/version.h>
34 #include <linux/user_namespace.h>
35 #include <linux/uidgid.h>
37 #include <uapi/linux/lustre/lustre_param.h>
38 #include <lprocfs_status.h>
39 #include <obd_support.h>
41 #include "llite_internal.h"
42 #include "lprocfs_status.h"
43 #include "vvp_internal.h"
45 static struct kobject *llite_kobj;
46 static struct dentry *llite_root;
48 static void llite_kobj_release(struct kobject *kobj)
50 if (!IS_ERR_OR_NULL(llite_root)) {
51 debugfs_remove(llite_root);
58 static struct kobj_type llite_kobj_ktype = {
59 .release = llite_kobj_release,
60 .sysfs_ops = &lustre_sysfs_ops,
63 int llite_tunables_register(void)
67 llite_kobj = kzalloc(sizeof(*llite_kobj), GFP_KERNEL);
71 llite_kobj->kset = lustre_kset;
72 rc = kobject_init_and_add(llite_kobj, &llite_kobj_ktype,
73 &lustre_kset->kobj, "%s", "llite");
77 llite_root = debugfs_create_dir("llite", debugfs_lustre_root);
81 kobject_put(llite_kobj);
87 void llite_tunables_unregister(void)
89 kobject_put(llite_kobj);
93 /* <debugfs>/lustre/llite mount point registration */
94 static const struct file_operations ll_rw_extents_stats_fops;
95 static const struct file_operations ll_rw_extents_stats_pp_fops;
96 static const struct file_operations ll_rw_offset_stats_fops;
99 * ll_stats_pid_write() - Determine if stats collection should be enabled
100 * @buf: Buffer containing the data written
101 * @len: Number of bytes in the buffer
103 * Several proc files begin collecting stats when a value is written, and stop
104 * collecting when either '0' or 'disable' is written. This function checks the
105 * written value to see if collection should be enabled or disabled.
107 * Return: If '0' or 'disable' is provided, 0 is returned. If the text
108 * equivalent of a number is written, that number is returned. Otherwise,
109 * 1 is returned. Non-zero return values indicate collection should be enabled.
111 static s64 ll_stats_pid_write(const char __user *buf, size_t len)
113 unsigned long long value = 1;
117 rc = kstrtoull_from_user(buf, len, 0, &value);
118 if (rc < 0 && len < sizeof(kernbuf)) {
119 if (copy_from_user(kernbuf, buf, len))
123 if (kernbuf[len - 1] == '\n')
124 kernbuf[len - 1] = 0;
126 if (strncasecmp(kernbuf, "disable", 7) == 0)
133 static ssize_t blocksize_show(struct kobject *kobj, struct attribute *attr,
136 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
138 struct obd_statfs osfs;
141 rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
145 return sprintf(buf, "%u\n", osfs.os_bsize);
147 LUSTRE_RO_ATTR(blocksize);
149 static ssize_t stat_blocksize_show(struct kobject *kobj, struct attribute *attr,
152 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
155 return sprintf(buf, "%u\n", sbi->ll_stat_blksize);
158 static ssize_t stat_blocksize_store(struct kobject *kobj,
159 struct attribute *attr,
163 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
168 rc = kstrtouint(buffer, 10, &val);
172 if (val != 0 && (val < PAGE_SIZE || (val & (val - 1))) != 0)
175 sbi->ll_stat_blksize = val;
179 LUSTRE_RW_ATTR(stat_blocksize);
181 static ssize_t kbytestotal_show(struct kobject *kobj, struct attribute *attr,
184 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
186 struct obd_statfs osfs;
191 rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
195 blk_size = osfs.os_bsize >> 10;
196 result = osfs.os_blocks;
198 while (blk_size >>= 1)
201 return sprintf(buf, "%llu\n", result);
203 LUSTRE_RO_ATTR(kbytestotal);
205 static ssize_t kbytesfree_show(struct kobject *kobj, struct attribute *attr,
208 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
210 struct obd_statfs osfs;
215 rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
219 blk_size = osfs.os_bsize >> 10;
220 result = osfs.os_bfree;
222 while (blk_size >>= 1)
225 return sprintf(buf, "%llu\n", result);
227 LUSTRE_RO_ATTR(kbytesfree);
229 static ssize_t kbytesavail_show(struct kobject *kobj, struct attribute *attr,
232 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
234 struct obd_statfs osfs;
239 rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
243 blk_size = osfs.os_bsize >> 10;
244 result = osfs.os_bavail;
246 while (blk_size >>= 1)
249 return sprintf(buf, "%llu\n", result);
251 LUSTRE_RO_ATTR(kbytesavail);
253 static ssize_t filestotal_show(struct kobject *kobj, struct attribute *attr,
256 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
258 struct obd_statfs osfs;
261 rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
265 return sprintf(buf, "%llu\n", osfs.os_files);
267 LUSTRE_RO_ATTR(filestotal);
269 static ssize_t filesfree_show(struct kobject *kobj, struct attribute *attr,
272 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
274 struct obd_statfs osfs;
277 rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
281 return sprintf(buf, "%llu\n", osfs.os_ffree);
283 LUSTRE_RO_ATTR(filesfree);
285 static ssize_t client_type_show(struct kobject *kobj, struct attribute *attr,
288 return sprintf(buf, "local client\n");
290 LUSTRE_RO_ATTR(client_type);
292 LUSTRE_RW_ATTR(foreign_symlink_enable);
294 LUSTRE_RW_ATTR(foreign_symlink_prefix);
296 LUSTRE_RW_ATTR(foreign_symlink_upcall);
298 LUSTRE_WO_ATTR(foreign_symlink_upcall_info);
300 static ssize_t fstype_show(struct kobject *kobj, struct attribute *attr,
303 return sprintf(buf, "lustre\n");
305 LUSTRE_RO_ATTR(fstype);
307 static ssize_t uuid_show(struct kobject *kobj, struct attribute *attr,
310 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
313 return sprintf(buf, "%s\n", sbi->ll_sb_uuid.uuid);
315 LUSTRE_RO_ATTR(uuid);
317 static int ll_site_stats_seq_show(struct seq_file *m, void *v)
319 struct super_block *sb = m->private;
322 * See description of statistical counters in struct cl_site, and
325 return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site), m);
328 LDEBUGFS_SEQ_FOPS_RO(ll_site_stats);
330 static ssize_t max_read_ahead_mb_show(struct kobject *kobj,
331 struct attribute *attr, char *buf)
333 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
336 return scnprintf(buf, PAGE_SIZE, "%lu\n",
337 PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages));
340 static ssize_t max_read_ahead_mb_store(struct kobject *kobj,
341 struct attribute *attr,
342 const char *buffer, size_t count)
344 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
346 u64 ra_max_mb, pages_number;
349 rc = sysfs_memparse(buffer, count, &ra_max_mb, "MiB");
353 pages_number = round_up(ra_max_mb, 1024 * 1024) >> PAGE_SHIFT;
354 CDEBUG(D_INFO, "%s: set max_read_ahead_mb=%llu (%llu pages)\n",
355 sbi->ll_fsname, PAGES_TO_MiB(pages_number), pages_number);
356 if (pages_number > cfs_totalram_pages() / 2) {
358 CERROR("%s: cannot set max_read_ahead_mb=%llu > totalram/2=%luMB\n",
359 sbi->ll_fsname, PAGES_TO_MiB(pages_number),
360 PAGES_TO_MiB(cfs_totalram_pages() / 2));
364 spin_lock(&sbi->ll_lock);
365 sbi->ll_ra_info.ra_max_pages = pages_number;
366 spin_unlock(&sbi->ll_lock);
370 LUSTRE_RW_ATTR(max_read_ahead_mb);
372 static ssize_t max_read_ahead_per_file_mb_show(struct kobject *kobj,
373 struct attribute *attr,
376 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
379 return scnprintf(buf, PAGE_SIZE, "%lu\n",
380 PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages_per_file));
383 static ssize_t max_read_ahead_per_file_mb_store(struct kobject *kobj,
384 struct attribute *attr,
388 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
390 u64 ra_max_file_mb, pages_number;
393 rc = sysfs_memparse(buffer, count, &ra_max_file_mb, "MiB");
397 pages_number = round_up(ra_max_file_mb, 1024 * 1024) >> PAGE_SHIFT;
398 if (pages_number > sbi->ll_ra_info.ra_max_pages) {
399 CERROR("%s: cannot set max_read_ahead_per_file_mb=%llu > max_read_ahead_mb=%lu\n",
400 sbi->ll_fsname, PAGES_TO_MiB(pages_number),
401 PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages));
405 spin_lock(&sbi->ll_lock);
406 sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
407 spin_unlock(&sbi->ll_lock);
411 LUSTRE_RW_ATTR(max_read_ahead_per_file_mb);
413 static ssize_t max_read_ahead_whole_mb_show(struct kobject *kobj,
414 struct attribute *attr, char *buf)
416 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
419 return scnprintf(buf, PAGE_SIZE, "%lu\n",
420 PAGES_TO_MiB(sbi->ll_ra_info.ra_max_read_ahead_whole_pages));
423 static ssize_t max_read_ahead_whole_mb_store(struct kobject *kobj,
424 struct attribute *attr,
425 const char *buffer, size_t count)
427 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
429 u64 ra_max_whole_mb, pages_number;
432 rc = sysfs_memparse(buffer, count, &ra_max_whole_mb, "MiB");
436 pages_number = round_up(ra_max_whole_mb, 1024 * 1024) >> PAGE_SHIFT;
437 /* Cap this at the current max readahead window size, the readahead
438 * algorithm does this anyway so it's pointless to set it larger.
440 if (pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
441 CERROR("%s: cannot set max_read_ahead_whole_mb=%llu > max_read_ahead_per_file_mb=%lu\n",
442 sbi->ll_fsname, PAGES_TO_MiB(pages_number),
443 PAGES_TO_MiB(sbi->ll_ra_info.ra_max_pages_per_file));
448 spin_lock(&sbi->ll_lock);
449 sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
450 spin_unlock(&sbi->ll_lock);
454 LUSTRE_RW_ATTR(max_read_ahead_whole_mb);
456 static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v)
458 struct super_block *sb = m->private;
459 struct ll_sb_info *sbi = ll_s2sbi(sb);
460 struct cl_client_cache *cache = sbi->ll_cache;
461 struct ll_ra_info *ra = &sbi->ll_ra_info;
465 mutex_lock(&cache->ccc_max_cache_mb_lock);
466 max_cached_mb = PAGES_TO_MiB(cache->ccc_lru_max);
467 unused_mb = PAGES_TO_MiB(atomic_long_read(&cache->ccc_lru_left));
468 mutex_unlock(&cache->ccc_max_cache_mb_lock);
470 seq_printf(m, "users: %d\n"
471 "max_cached_mb: %ld\n"
474 "reclaim_count: %u\n"
475 "max_read_ahead_mb: %lu\n"
476 "used_read_ahead_mb: %d\n",
477 atomic_read(&cache->ccc_users),
479 max_cached_mb - unused_mb,
481 cache->ccc_lru_shrinkers,
482 PAGES_TO_MiB(ra->ra_max_pages),
483 PAGES_TO_MiB(atomic_read(&ra->ra_cur_pages)));
487 static ssize_t ll_max_cached_mb_seq_write(struct file *file,
488 const char __user *buffer,
489 size_t count, loff_t *off)
491 struct seq_file *m = file->private_data;
492 struct super_block *sb = m->private;
493 struct ll_sb_info *sbi = ll_s2sbi(sb);
494 struct cl_client_cache *cache = sbi->ll_cache;
501 char kernbuf[128], *ptr;
504 if (count >= sizeof(kernbuf))
507 if (copy_from_user(kernbuf, buffer, count))
509 kernbuf[count] = '\0';
511 ptr = lprocfs_find_named_value(kernbuf, "max_cached_mb:", &count);
512 rc = sysfs_memparse(ptr, count, &pages_number, "MiB");
516 pages_number >>= PAGE_SHIFT;
518 if (pages_number < 0 || pages_number > cfs_totalram_pages()) {
519 CERROR("%s: can't set max cache more than %lu MB\n",
521 PAGES_TO_MiB(cfs_totalram_pages()));
524 /* Allow enough cache so clients can make well-formed RPCs */
525 pages_number = max_t(long, pages_number, PTLRPC_MAX_BRW_PAGES);
527 mutex_lock(&cache->ccc_max_cache_mb_lock);
528 diff = pages_number - cache->ccc_lru_max;
530 /* easy - add more LRU slots. */
532 atomic_long_add(diff, &cache->ccc_lru_left);
536 env = cl_env_get(&refcheck);
538 GOTO(out_unlock, rc = PTR_ERR(env));
544 /* reduce LRU budget from free slots. */
546 long lru_left_old, lru_left_new, lru_left_ret;
548 lru_left_old = atomic_long_read(&cache->ccc_lru_left);
549 if (lru_left_old == 0)
552 lru_left_new = lru_left_old > diff ?
553 lru_left_old - diff : 0;
555 atomic_long_cmpxchg(&cache->ccc_lru_left,
558 if (likely(lru_left_old == lru_left_ret)) {
559 diff -= lru_left_old - lru_left_new;
560 nrpages += lru_left_old - lru_left_new;
568 if (sbi->ll_dt_exp == NULL) { /* being initialized */
573 /* Request extra free slots to avoid them all being used
574 * by other processes before this can continue shrinking.
576 tmp = diff + min_t(long, diff, MiB_TO_PAGES(1024));
577 /* difficult - have to ask OSCs to drop LRU slots. */
578 rc = obd_set_info_async(env, sbi->ll_dt_exp,
579 sizeof(KEY_CACHE_LRU_SHRINK),
580 KEY_CACHE_LRU_SHRINK,
581 sizeof(tmp), &tmp, NULL);
585 cl_env_put(env, &refcheck);
589 cache->ccc_lru_max = pages_number;
592 atomic_long_add(nrpages, &cache->ccc_lru_left);
595 mutex_unlock(&cache->ccc_max_cache_mb_lock);
598 LDEBUGFS_SEQ_FOPS(ll_max_cached_mb);
600 static ssize_t checksums_show(struct kobject *kobj, struct attribute *attr,
603 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
606 return scnprintf(buf, PAGE_SIZE, "%u\n",
607 test_bit(LL_SBI_CHECKSUM, sbi->ll_flags));
610 static ssize_t checksums_store(struct kobject *kobj, struct attribute *attr,
611 const char *buffer, size_t count)
613 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
623 rc = kstrtobool(buffer, &val);
627 set_bit(LL_SBI_CHECKSUM, sbi->ll_flags);
629 clear_bit(LL_SBI_CHECKSUM, sbi->ll_flags);
632 rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
633 KEY_CHECKSUM, sizeof(tmp), &tmp, NULL);
635 CWARN("Failed to set OSC checksum flags: %d\n", rc);
639 LUSTRE_RW_ATTR(checksums);
641 LUSTRE_ATTR(checksum_pages, 0644, checksums_show, checksums_store);
643 static ssize_t ll_rd_track_id(struct kobject *kobj, char *buf,
644 enum stats_track_type type)
646 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
649 if (sbi->ll_stats_track_type == type)
650 return sprintf(buf, "%d\n", sbi->ll_stats_track_id);
651 else if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
652 return sprintf(buf, "0 (all)\n");
654 return sprintf(buf, "untracked\n");
657 static ssize_t ll_wr_track_id(struct kobject *kobj, const char *buffer,
658 size_t count, enum stats_track_type type)
660 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
665 rc = kstrtoul(buffer, 10, &pid);
669 sbi->ll_stats_track_id = pid;
671 sbi->ll_stats_track_type = STATS_TRACK_ALL;
673 sbi->ll_stats_track_type = type;
674 lprocfs_clear_stats(sbi->ll_stats);
678 static ssize_t stats_track_pid_show(struct kobject *kobj,
679 struct attribute *attr,
682 return ll_rd_track_id(kobj, buf, STATS_TRACK_PID);
685 static ssize_t stats_track_pid_store(struct kobject *kobj,
686 struct attribute *attr,
690 return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PID);
692 LUSTRE_RW_ATTR(stats_track_pid);
694 static ssize_t stats_track_ppid_show(struct kobject *kobj,
695 struct attribute *attr,
698 return ll_rd_track_id(kobj, buf, STATS_TRACK_PPID);
701 static ssize_t stats_track_ppid_store(struct kobject *kobj,
702 struct attribute *attr,
706 return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PPID);
708 LUSTRE_RW_ATTR(stats_track_ppid);
710 static ssize_t stats_track_gid_show(struct kobject *kobj,
711 struct attribute *attr,
714 return ll_rd_track_id(kobj, buf, STATS_TRACK_GID);
717 static ssize_t stats_track_gid_store(struct kobject *kobj,
718 struct attribute *attr,
722 return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_GID);
724 LUSTRE_RW_ATTR(stats_track_gid);
726 static ssize_t statahead_running_max_show(struct kobject *kobj,
727 struct attribute *attr,
730 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
733 return scnprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_sa_running_max);
736 static ssize_t statahead_running_max_store(struct kobject *kobj,
737 struct attribute *attr,
741 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
746 rc = kstrtoul(buffer, 0, &val);
750 if (val <= LL_SA_RUNNING_MAX) {
751 sbi->ll_sa_running_max = val;
755 CERROR("Bad statahead_running_max value %lu. Valid values "
756 "are in the range [0, %d]\n", val, LL_SA_RUNNING_MAX);
760 LUSTRE_RW_ATTR(statahead_running_max);
762 static ssize_t statahead_max_show(struct kobject *kobj,
763 struct attribute *attr,
766 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
769 return sprintf(buf, "%u\n", sbi->ll_sa_max);
772 static ssize_t statahead_max_store(struct kobject *kobj,
773 struct attribute *attr,
777 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
782 rc = kstrtoul(buffer, 0, &val);
786 if (val <= LL_SA_RPC_MAX)
787 sbi->ll_sa_max = val;
789 CERROR("Bad statahead_max value %lu. Valid values are in the range [0, %d]\n",
794 LUSTRE_RW_ATTR(statahead_max);
796 static ssize_t statahead_agl_show(struct kobject *kobj,
797 struct attribute *attr,
800 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
803 return scnprintf(buf, PAGE_SIZE, "%u\n",
804 test_bit(LL_SBI_AGL_ENABLED, sbi->ll_flags));
807 static ssize_t statahead_agl_store(struct kobject *kobj,
808 struct attribute *attr,
812 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
817 rc = kstrtobool(buffer, &val);
822 set_bit(LL_SBI_AGL_ENABLED, sbi->ll_flags);
824 clear_bit(LL_SBI_AGL_ENABLED, sbi->ll_flags);
828 LUSTRE_RW_ATTR(statahead_agl);
830 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
832 struct super_block *sb = m->private;
833 struct ll_sb_info *sbi = ll_s2sbi(sb);
835 seq_printf(m, "statahead total: %u\n"
836 "statahead wrong: %u\n"
840 atomic_read(&sbi->ll_sa_total),
841 atomic_read(&sbi->ll_sa_wrong),
842 atomic_read(&sbi->ll_agl_total),
843 atomic_read(&sbi->ll_sa_hit_total),
844 atomic_read(&sbi->ll_sa_miss_total));
848 static ssize_t ll_statahead_stats_seq_write(struct file *file,
849 const char __user *buffer,
850 size_t count, loff_t *off)
852 struct seq_file *m = file->private_data;
853 struct super_block *sb = m->private;
854 struct ll_sb_info *sbi = ll_s2sbi(sb);
856 atomic_set(&sbi->ll_sa_total, 0);
857 atomic_set(&sbi->ll_sa_wrong, 0);
858 atomic_set(&sbi->ll_agl_total, 0);
859 atomic_set(&sbi->ll_sa_hit_total, 0);
860 atomic_set(&sbi->ll_sa_miss_total, 0);
864 LDEBUGFS_SEQ_FOPS(ll_statahead_stats);
866 static ssize_t lazystatfs_show(struct kobject *kobj,
867 struct attribute *attr,
870 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
873 return scnprintf(buf, PAGE_SIZE, "%u\n",
874 test_bit(LL_SBI_LAZYSTATFS, sbi->ll_flags));
877 static ssize_t lazystatfs_store(struct kobject *kobj,
878 struct attribute *attr,
882 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
887 rc = kstrtobool(buffer, &val);
892 set_bit(LL_SBI_LAZYSTATFS, sbi->ll_flags);
894 clear_bit(LL_SBI_LAZYSTATFS, sbi->ll_flags);
898 LUSTRE_RW_ATTR(lazystatfs);
900 static ssize_t statfs_max_age_show(struct kobject *kobj, struct attribute *attr,
903 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
906 return scnprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_statfs_max_age);
909 static ssize_t statfs_max_age_store(struct kobject *kobj,
910 struct attribute *attr, const char *buffer,
913 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
918 rc = kstrtouint(buffer, 10, &val);
921 if (val > OBD_STATFS_CACHE_MAX_AGE)
924 sbi->ll_statfs_max_age = val;
928 LUSTRE_RW_ATTR(statfs_max_age);
930 static ssize_t max_easize_show(struct kobject *kobj,
931 struct attribute *attr,
934 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
939 rc = ll_get_max_mdsize(sbi, &ealen);
943 /* Limit xattr size returned to userspace based on kernel maximum */
944 return scnprintf(buf, PAGE_SIZE, "%u\n",
945 ealen > XATTR_SIZE_MAX ? XATTR_SIZE_MAX : ealen);
947 LUSTRE_RO_ATTR(max_easize);
950 * Get default_easize.
952 * \see client_obd::cl_default_mds_easize
954 * \param[in] m seq_file handle
955 * \param[in] v unused for single entry
957 * \retval 0 on success
958 * \retval negative negated errno on failure
960 static ssize_t default_easize_show(struct kobject *kobj,
961 struct attribute *attr,
964 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
969 rc = ll_get_default_mdsize(sbi, &ealen);
973 /* Limit xattr size returned to userspace based on kernel maximum */
974 return scnprintf(buf, PAGE_SIZE, "%u\n",
975 ealen > XATTR_SIZE_MAX ? XATTR_SIZE_MAX : ealen);
979 * Set default_easize.
981 * Range checking on the passed value is handled by
982 * ll_set_default_mdsize().
984 * \see client_obd::cl_default_mds_easize
986 * \param[in] file proc file
987 * \param[in] buffer string passed from user space
988 * \param[in] count \a buffer length
989 * \param[in] off unused for single entry
991 * \retval positive \a count on success
992 * \retval negative negated errno on failure
994 static ssize_t default_easize_store(struct kobject *kobj,
995 struct attribute *attr,
999 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1007 rc = kstrtouint(buffer, 10, &val);
1011 rc = ll_set_default_mdsize(sbi, val);
1017 LUSTRE_RW_ATTR(default_easize);
1019 LDEBUGFS_SEQ_FOPS_RO(ll_sbi_flags);
1021 static ssize_t xattr_cache_show(struct kobject *kobj,
1022 struct attribute *attr,
1025 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1028 return sprintf(buf, "%u\n", sbi->ll_xattr_cache_enabled);
1031 static ssize_t xattr_cache_store(struct kobject *kobj,
1032 struct attribute *attr,
1036 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1041 rc = kstrtobool(buffer, &val);
1045 if (val && !test_bit(LL_SBI_XATTR_CACHE, sbi->ll_flags))
1048 sbi->ll_xattr_cache_enabled = val;
1049 sbi->ll_xattr_cache_set = 1;
1053 LUSTRE_RW_ATTR(xattr_cache);
1055 static ssize_t tiny_write_show(struct kobject *kobj,
1056 struct attribute *attr,
1059 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1062 return scnprintf(buf, PAGE_SIZE, "%u\n",
1063 test_bit(LL_SBI_TINY_WRITE, sbi->ll_flags));
1066 static ssize_t tiny_write_store(struct kobject *kobj,
1067 struct attribute *attr,
1071 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1076 rc = kstrtobool(buffer, &val);
1080 spin_lock(&sbi->ll_lock);
1082 set_bit(LL_SBI_TINY_WRITE, sbi->ll_flags);
1084 clear_bit(LL_SBI_TINY_WRITE, sbi->ll_flags);
1085 spin_unlock(&sbi->ll_lock);
1089 LUSTRE_RW_ATTR(tiny_write);
1091 static ssize_t parallel_dio_show(struct kobject *kobj,
1092 struct attribute *attr,
1095 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1098 return snprintf(buf, PAGE_SIZE, "%u\n",
1099 test_bit(LL_SBI_PARALLEL_DIO, sbi->ll_flags));
1102 static ssize_t parallel_dio_store(struct kobject *kobj,
1103 struct attribute *attr,
1107 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1112 rc = kstrtobool(buffer, &val);
1116 spin_lock(&sbi->ll_lock);
1118 set_bit(LL_SBI_PARALLEL_DIO, sbi->ll_flags);
1120 clear_bit(LL_SBI_PARALLEL_DIO, sbi->ll_flags);
1121 spin_unlock(&sbi->ll_lock);
1125 LUSTRE_RW_ATTR(parallel_dio);
1127 static ssize_t max_read_ahead_async_active_show(struct kobject *kobj,
1128 struct attribute *attr,
1131 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1134 return scnprintf(buf, PAGE_SIZE, "%u\n",
1135 sbi->ll_ra_info.ra_async_max_active);
1138 static ssize_t max_read_ahead_async_active_store(struct kobject *kobj,
1139 struct attribute *attr,
1143 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1148 rc = kstrtouint(buffer, 10, &val);
1153 * It doesn't make any sense to make it exceed what
1154 * workqueue could acutally support. This can easily
1155 * over subscripe the cores but Lustre internally
1156 * throttles to avoid those impacts.
1158 if (val > WQ_UNBOUND_MAX_ACTIVE) {
1159 CERROR("%s: cannot set max_read_ahead_async_active=%u larger than %u\n",
1160 sbi->ll_fsname, val, WQ_UNBOUND_MAX_ACTIVE);
1164 spin_lock(&sbi->ll_lock);
1165 sbi->ll_ra_info.ra_async_max_active = val;
1166 spin_unlock(&sbi->ll_lock);
1170 LUSTRE_RW_ATTR(max_read_ahead_async_active);
1172 static ssize_t read_ahead_async_file_threshold_mb_show(struct kobject *kobj,
1173 struct attribute *attr,
1176 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1179 return scnprintf(buf, PAGE_SIZE, "%lu\n", PAGES_TO_MiB(
1180 sbi->ll_ra_info.ra_async_pages_per_file_threshold));
1184 read_ahead_async_file_threshold_mb_store(struct kobject *kobj,
1185 struct attribute *attr,
1186 const char *buffer, size_t count)
1188 unsigned long pages_number;
1189 unsigned long max_ra_per_file;
1190 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1194 rc = kstrtoul(buffer, 10, &pages_number);
1198 pages_number = MiB_TO_PAGES(pages_number);
1199 max_ra_per_file = sbi->ll_ra_info.ra_max_pages_per_file;
1200 if (pages_number < 0 || pages_number > max_ra_per_file) {
1201 CERROR("%s: can't set read_ahead_async_file_threshold_mb=%lu > "
1202 "max_read_readahead_per_file_mb=%lu\n", sbi->ll_fsname,
1203 PAGES_TO_MiB(pages_number),
1204 PAGES_TO_MiB(max_ra_per_file));
1207 sbi->ll_ra_info.ra_async_pages_per_file_threshold = pages_number;
1211 LUSTRE_RW_ATTR(read_ahead_async_file_threshold_mb);
1213 static ssize_t read_ahead_range_kb_show(struct kobject *kobj,
1214 struct attribute *attr,char *buf)
1216 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1219 return snprintf(buf, PAGE_SIZE, "%lu\n",
1220 sbi->ll_ra_info.ra_range_pages << (PAGE_SHIFT - 10));
1224 read_ahead_range_kb_store(struct kobject *kobj,
1225 struct attribute *attr,
1226 const char *buffer, size_t count)
1228 unsigned long pages_number;
1229 unsigned long max_ra_per_file;
1231 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1235 rc = sysfs_memparse(buffer, count, &val, "KiB");
1239 pages_number = val >> PAGE_SHIFT;
1240 /* Disable mmap range read */
1241 if (pages_number == 0)
1244 max_ra_per_file = sbi->ll_ra_info.ra_max_pages_per_file;
1245 if (pages_number > max_ra_per_file ||
1246 pages_number < RA_MIN_MMAP_RANGE_PAGES)
1250 spin_lock(&sbi->ll_lock);
1251 sbi->ll_ra_info.ra_range_pages = pages_number;
1252 spin_unlock(&sbi->ll_lock);
1256 LUSTRE_RW_ATTR(read_ahead_range_kb);
1258 static ssize_t fast_read_show(struct kobject *kobj,
1259 struct attribute *attr,
1262 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1265 return scnprintf(buf, PAGE_SIZE, "%u\n",
1266 test_bit(LL_SBI_FAST_READ, sbi->ll_flags));
1269 static ssize_t fast_read_store(struct kobject *kobj,
1270 struct attribute *attr,
1274 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1279 rc = kstrtobool(buffer, &val);
1283 spin_lock(&sbi->ll_lock);
1285 set_bit(LL_SBI_FAST_READ, sbi->ll_flags);
1287 clear_bit(LL_SBI_FAST_READ, sbi->ll_flags);
1288 spin_unlock(&sbi->ll_lock);
1292 LUSTRE_RW_ATTR(fast_read);
1294 static ssize_t file_heat_show(struct kobject *kobj,
1295 struct attribute *attr,
1298 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1301 return scnprintf(buf, PAGE_SIZE, "%u\n",
1302 test_bit(LL_SBI_FILE_HEAT, sbi->ll_flags));
1305 static ssize_t file_heat_store(struct kobject *kobj,
1306 struct attribute *attr,
1310 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1315 rc = kstrtobool(buffer, &val);
1319 spin_lock(&sbi->ll_lock);
1321 set_bit(LL_SBI_FILE_HEAT, sbi->ll_flags);
1323 clear_bit(LL_SBI_FILE_HEAT, sbi->ll_flags);
1324 spin_unlock(&sbi->ll_lock);
1328 LUSTRE_RW_ATTR(file_heat);
1330 static ssize_t heat_decay_percentage_show(struct kobject *kobj,
1331 struct attribute *attr,
1334 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1337 return scnprintf(buf, PAGE_SIZE, "%u\n",
1338 (sbi->ll_heat_decay_weight * 100 + 128) / 256);
1341 static ssize_t heat_decay_percentage_store(struct kobject *kobj,
1342 struct attribute *attr,
1346 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1351 rc = kstrtoul(buffer, 10, &val);
1355 if (val < 0 || val > 100)
1358 sbi->ll_heat_decay_weight = (val * 256 + 50) / 100;
1362 LUSTRE_RW_ATTR(heat_decay_percentage);
1364 static ssize_t heat_period_second_show(struct kobject *kobj,
1365 struct attribute *attr,
1368 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1371 return scnprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_heat_period_second);
1374 static ssize_t heat_period_second_store(struct kobject *kobj,
1375 struct attribute *attr,
1379 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1384 rc = kstrtoul(buffer, 10, &val);
1391 sbi->ll_heat_period_second = val;
1395 LUSTRE_RW_ATTR(heat_period_second);
1397 static ssize_t opencache_threshold_count_show(struct kobject *kobj,
1398 struct attribute *attr,
1401 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1404 if (sbi->ll_oc_thrsh_count)
1405 return snprintf(buf, PAGE_SIZE, "%u\n",
1406 sbi->ll_oc_thrsh_count);
1408 return snprintf(buf, PAGE_SIZE, "off\n");
1411 static ssize_t opencache_threshold_count_store(struct kobject *kobj,
1412 struct attribute *attr,
1416 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1421 rc = kstrtouint(buffer, 10, &val);
1424 /* also accept "off" to disable and "on" to always cache */
1425 rc = kstrtobool(buffer, &enable);
1430 sbi->ll_oc_thrsh_count = val;
1434 LUSTRE_RW_ATTR(opencache_threshold_count);
1436 static ssize_t opencache_threshold_ms_show(struct kobject *kobj,
1437 struct attribute *attr,
1440 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1443 return snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_oc_thrsh_ms);
1446 static ssize_t opencache_threshold_ms_store(struct kobject *kobj,
1447 struct attribute *attr,
1451 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1456 rc = kstrtouint(buffer, 10, &val);
1460 sbi->ll_oc_thrsh_ms = val;
1464 LUSTRE_RW_ATTR(opencache_threshold_ms);
1466 static ssize_t opencache_max_ms_show(struct kobject *kobj,
1467 struct attribute *attr,
1470 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1473 return snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_oc_max_ms);
1476 static ssize_t opencache_max_ms_store(struct kobject *kobj,
1477 struct attribute *attr,
1481 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1486 rc = kstrtouint(buffer, 10, &val);
1490 sbi->ll_oc_max_ms = val;
1494 LUSTRE_RW_ATTR(opencache_max_ms);
1496 static ssize_t inode_cache_show(struct kobject *kobj,
1497 struct attribute *attr,
1500 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1503 return snprintf(buf, PAGE_SIZE, "%u\n", sbi->ll_inode_cache_enabled);
1506 static ssize_t inode_cache_store(struct kobject *kobj,
1507 struct attribute *attr,
1511 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1516 rc = kstrtobool(buffer, &val);
1520 sbi->ll_inode_cache_enabled = val;
1524 LUSTRE_RW_ATTR(inode_cache);
1526 static int ll_unstable_stats_seq_show(struct seq_file *m, void *v)
1528 struct super_block *sb = m->private;
1529 struct ll_sb_info *sbi = ll_s2sbi(sb);
1530 struct cl_client_cache *cache = sbi->ll_cache;
1534 pages = atomic_long_read(&cache->ccc_unstable_nr);
1535 mb = (pages * PAGE_SIZE) >> 20;
1537 seq_printf(m, "unstable_check: %8d\n"
1538 "unstable_pages: %12ld\n"
1539 "unstable_mb: %8d\n",
1540 cache->ccc_unstable_check, pages, mb);
1544 static ssize_t ll_unstable_stats_seq_write(struct file *file,
1545 const char __user *buffer,
1546 size_t count, loff_t *unused)
1548 struct seq_file *seq = file->private_data;
1549 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)seq->private);
1556 if (count >= sizeof(kernbuf))
1559 if (copy_from_user(kernbuf, buffer, count))
1563 buffer += lprocfs_find_named_value(kernbuf, "unstable_check:", &count) -
1565 rc = kstrtobool_from_user(buffer, count, &val);
1569 /* borrow lru lock to set the value */
1570 spin_lock(&sbi->ll_cache->ccc_lru_lock);
1571 sbi->ll_cache->ccc_unstable_check = val;
1572 spin_unlock(&sbi->ll_cache->ccc_lru_lock);
1577 LDEBUGFS_SEQ_FOPS(ll_unstable_stats);
1579 static int ll_root_squash_seq_show(struct seq_file *m, void *v)
1581 struct super_block *sb = m->private;
1582 struct ll_sb_info *sbi = ll_s2sbi(sb);
1583 struct root_squash_info *squash = &sbi->ll_squash;
1585 seq_printf(m, "%u:%u\n", squash->rsi_uid, squash->rsi_gid);
1589 static ssize_t ll_root_squash_seq_write(struct file *file,
1590 const char __user *buffer,
1591 size_t count, loff_t *off)
1593 struct seq_file *m = file->private_data;
1594 struct super_block *sb = m->private;
1595 struct ll_sb_info *sbi = ll_s2sbi(sb);
1596 struct root_squash_info *squash = &sbi->ll_squash;
1598 return lprocfs_wr_root_squash(buffer, count, squash, sbi->ll_fsname);
1601 LDEBUGFS_SEQ_FOPS(ll_root_squash);
1603 static int ll_nosquash_nids_seq_show(struct seq_file *m, void *v)
1605 struct super_block *sb = m->private;
1606 struct ll_sb_info *sbi = ll_s2sbi(sb);
1607 struct root_squash_info *squash = &sbi->ll_squash;
1610 spin_lock(&squash->rsi_lock);
1611 if (!list_empty(&squash->rsi_nosquash_nids)) {
1612 len = cfs_print_nidlist(m->buf + m->count, m->size - m->count,
1613 &squash->rsi_nosquash_nids);
1617 seq_puts(m, "NONE\n");
1619 spin_unlock(&squash->rsi_lock);
1624 static ssize_t ll_nosquash_nids_seq_write(struct file *file,
1625 const char __user *buffer,
1626 size_t count, loff_t *off)
1628 struct seq_file *m = file->private_data;
1629 struct super_block *sb = m->private;
1630 struct ll_sb_info *sbi = ll_s2sbi(sb);
1631 struct root_squash_info *squash = &sbi->ll_squash;
1634 rc = lprocfs_wr_nosquash_nids(buffer, count, squash, sbi->ll_fsname);
1638 ll_compute_rootsquash_state(sbi);
1643 LDEBUGFS_SEQ_FOPS(ll_nosquash_nids);
1645 static int ll_filename_enc_seq_show(struct seq_file *m, void *v)
1647 struct super_block *sb = m->private;
1648 struct lustre_sb_info *lsi = s2lsi(sb);
1650 seq_printf(m, "%u\n", lsi->lsi_flags & LSI_FILENAME_ENC ? 1 : 0);
1654 static ssize_t ll_filename_enc_seq_write(struct file *file,
1655 const char __user *buffer,
1656 size_t count, loff_t *off)
1658 struct seq_file *m = file->private_data;
1659 struct super_block *sb = m->private;
1660 struct lustre_sb_info *lsi = s2lsi(sb);
1661 struct ll_sb_info *sbi = ll_s2sbi(sb);
1665 rc = kstrtobool_from_user(buffer, count, &val);
1670 if (!ll_sbi_has_name_encrypt(sbi)) {
1671 /* server does not support name encryption,
1672 * so force it to NULL on client
1674 CDEBUG(D_SEC, "%s: server does not support name encryption\n",
1676 lsi->lsi_flags &= ~LSI_FILENAME_ENC;
1680 lsi->lsi_flags |= LSI_FILENAME_ENC;
1682 lsi->lsi_flags &= ~LSI_FILENAME_ENC;
1688 LDEBUGFS_SEQ_FOPS(ll_filename_enc);
1690 static int ll_pcc_seq_show(struct seq_file *m, void *v)
1692 struct super_block *sb = m->private;
1693 struct ll_sb_info *sbi = ll_s2sbi(sb);
1695 return pcc_super_dump(&sbi->ll_pcc_super, m);
1698 static ssize_t ll_pcc_seq_write(struct file *file, const char __user *buffer,
1699 size_t count, loff_t *off)
1701 struct seq_file *m = file->private_data;
1702 struct super_block *sb = m->private;
1703 struct ll_sb_info *sbi = ll_s2sbi(sb);
1707 if (count >= LPROCFS_WR_PCC_MAX_CMD)
1710 if (!(exp_connect_flags2(sbi->ll_md_exp) & OBD_CONNECT2_PCC))
1713 OBD_ALLOC(kernbuf, count + 1);
1714 if (kernbuf == NULL)
1717 if (copy_from_user(kernbuf, buffer, count))
1718 GOTO(out_free_kernbuff, rc = -EFAULT);
1720 rc = pcc_cmd_handle(kernbuf, count, &sbi->ll_pcc_super);
1722 OBD_FREE(kernbuf, count + 1);
1723 return rc ? rc : count;
1725 LDEBUGFS_SEQ_FOPS(ll_pcc);
1727 struct ldebugfs_vars lprocfs_llite_obd_vars[] = {
1729 .fops = &ll_site_stats_fops },
1730 { .name = "max_cached_mb",
1731 .fops = &ll_max_cached_mb_fops },
1732 { .name = "statahead_stats",
1733 .fops = &ll_statahead_stats_fops },
1734 { .name = "unstable_stats",
1735 .fops = &ll_unstable_stats_fops },
1736 { .name = "sbi_flags",
1737 .fops = &ll_sbi_flags_fops },
1738 { .name = "root_squash",
1739 .fops = &ll_root_squash_fops },
1740 { .name = "nosquash_nids",
1741 .fops = &ll_nosquash_nids_fops },
1743 .fops = &ll_pcc_fops, },
1744 { .name = "enable_filename_encryption",
1745 .fops = &ll_filename_enc_fops, },
1749 #define MAX_STRING_SIZE 128
1751 static struct attribute *llite_attrs[] = {
1752 &lustre_attr_blocksize.attr,
1753 &lustre_attr_stat_blocksize.attr,
1754 &lustre_attr_kbytestotal.attr,
1755 &lustre_attr_kbytesfree.attr,
1756 &lustre_attr_kbytesavail.attr,
1757 &lustre_attr_filestotal.attr,
1758 &lustre_attr_filesfree.attr,
1759 &lustre_attr_client_type.attr,
1760 &lustre_attr_foreign_symlink_enable.attr,
1761 &lustre_attr_foreign_symlink_prefix.attr,
1762 &lustre_attr_foreign_symlink_upcall.attr,
1763 &lustre_attr_foreign_symlink_upcall_info.attr,
1764 &lustre_attr_fstype.attr,
1765 &lustre_attr_uuid.attr,
1766 &lustre_attr_checksums.attr,
1767 &lustre_attr_checksum_pages.attr,
1768 &lustre_attr_max_read_ahead_mb.attr,
1769 &lustre_attr_max_read_ahead_per_file_mb.attr,
1770 &lustre_attr_max_read_ahead_whole_mb.attr,
1771 &lustre_attr_max_read_ahead_async_active.attr,
1772 &lustre_attr_read_ahead_async_file_threshold_mb.attr,
1773 &lustre_attr_read_ahead_range_kb.attr,
1774 &lustre_attr_stats_track_pid.attr,
1775 &lustre_attr_stats_track_ppid.attr,
1776 &lustre_attr_stats_track_gid.attr,
1777 &lustre_attr_statahead_running_max.attr,
1778 &lustre_attr_statahead_max.attr,
1779 &lustre_attr_statahead_agl.attr,
1780 &lustre_attr_lazystatfs.attr,
1781 &lustre_attr_statfs_max_age.attr,
1782 &lustre_attr_max_easize.attr,
1783 &lustre_attr_default_easize.attr,
1784 &lustre_attr_xattr_cache.attr,
1785 &lustre_attr_fast_read.attr,
1786 &lustre_attr_tiny_write.attr,
1787 &lustre_attr_parallel_dio.attr,
1788 &lustre_attr_file_heat.attr,
1789 &lustre_attr_heat_decay_percentage.attr,
1790 &lustre_attr_heat_period_second.attr,
1791 &lustre_attr_opencache_threshold_count.attr,
1792 &lustre_attr_opencache_threshold_ms.attr,
1793 &lustre_attr_opencache_max_ms.attr,
1794 &lustre_attr_inode_cache.attr,
1798 static void sbi_kobj_release(struct kobject *kobj)
1800 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1802 complete(&sbi->ll_kobj_unregister);
1805 static struct kobj_type sbi_ktype = {
1806 .default_attrs = llite_attrs,
1807 .sysfs_ops = &lustre_sysfs_ops,
1808 .release = sbi_kobj_release,
1811 static const struct llite_file_opcode {
1813 enum lprocfs_counter_config lfo_config;
1814 const char *lfo_opname;
1815 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
1816 /* file operation */
1817 { LPROC_LL_READ_BYTES, LPROCFS_TYPE_BYTES_FULL, "read_bytes" },
1818 { LPROC_LL_WRITE_BYTES, LPROCFS_TYPE_BYTES_FULL, "write_bytes" },
1819 { LPROC_LL_READ, LPROCFS_TYPE_LATENCY, "read" },
1820 { LPROC_LL_WRITE, LPROCFS_TYPE_LATENCY, "write" },
1821 { LPROC_LL_IOCTL, LPROCFS_TYPE_REQS, "ioctl" },
1822 { LPROC_LL_OPEN, LPROCFS_TYPE_LATENCY, "open" },
1823 { LPROC_LL_RELEASE, LPROCFS_TYPE_LATENCY, "close" },
1824 { LPROC_LL_MMAP, LPROCFS_TYPE_LATENCY, "mmap" },
1825 { LPROC_LL_FAULT, LPROCFS_TYPE_LATENCY, "page_fault" },
1826 { LPROC_LL_MKWRITE, LPROCFS_TYPE_LATENCY, "page_mkwrite" },
1827 { LPROC_LL_LLSEEK, LPROCFS_TYPE_LATENCY, "seek" },
1828 { LPROC_LL_FSYNC, LPROCFS_TYPE_LATENCY, "fsync" },
1829 { LPROC_LL_READDIR, LPROCFS_TYPE_LATENCY, "readdir" },
1830 { LPROC_LL_INODE_OCOUNT, LPROCFS_TYPE_REQS | LPROCFS_CNTR_AVGMINMAX |
1831 LPROCFS_CNTR_STDDEV, "opencount" },
1832 { LPROC_LL_INODE_OPCLTM,LPROCFS_TYPE_LATENCY, "openclosetime" },
1833 /* inode operation */
1834 { LPROC_LL_SETATTR, LPROCFS_TYPE_LATENCY, "setattr" },
1835 { LPROC_LL_TRUNC, LPROCFS_TYPE_LATENCY, "truncate" },
1836 { LPROC_LL_FLOCK, LPROCFS_TYPE_LATENCY, "flock" },
1837 { LPROC_LL_GETATTR, LPROCFS_TYPE_LATENCY, "getattr" },
1838 { LPROC_LL_FALLOCATE, LPROCFS_TYPE_LATENCY, "fallocate"},
1839 /* dir inode operation */
1840 { LPROC_LL_CREATE, LPROCFS_TYPE_LATENCY, "create" },
1841 { LPROC_LL_LINK, LPROCFS_TYPE_LATENCY, "link" },
1842 { LPROC_LL_UNLINK, LPROCFS_TYPE_LATENCY, "unlink" },
1843 { LPROC_LL_SYMLINK, LPROCFS_TYPE_LATENCY, "symlink" },
1844 { LPROC_LL_MKDIR, LPROCFS_TYPE_LATENCY, "mkdir" },
1845 { LPROC_LL_RMDIR, LPROCFS_TYPE_LATENCY, "rmdir" },
1846 { LPROC_LL_MKNOD, LPROCFS_TYPE_LATENCY, "mknod" },
1847 { LPROC_LL_RENAME, LPROCFS_TYPE_LATENCY, "rename" },
1848 /* special inode operation */
1849 { LPROC_LL_STATFS, LPROCFS_TYPE_LATENCY, "statfs" },
1850 { LPROC_LL_SETXATTR, LPROCFS_TYPE_LATENCY, "setxattr" },
1851 { LPROC_LL_GETXATTR, LPROCFS_TYPE_LATENCY, "getxattr" },
1852 { LPROC_LL_GETXATTR_HITS, LPROCFS_TYPE_REQS, "getxattr_hits" },
1853 { LPROC_LL_LISTXATTR, LPROCFS_TYPE_LATENCY, "listxattr" },
1854 { LPROC_LL_REMOVEXATTR, LPROCFS_TYPE_LATENCY, "removexattr" },
1855 { LPROC_LL_INODE_PERM, LPROCFS_TYPE_LATENCY, "inode_permission" },
1858 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, long count)
1863 if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
1864 lprocfs_counter_add(sbi->ll_stats, op, count);
1865 else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
1866 sbi->ll_stats_track_id == current->pid)
1867 lprocfs_counter_add(sbi->ll_stats, op, count);
1868 else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
1869 sbi->ll_stats_track_id == current->real_parent->pid)
1870 lprocfs_counter_add(sbi->ll_stats, op, count);
1871 else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
1872 sbi->ll_stats_track_id ==
1873 from_kgid(&init_user_ns, current_gid()))
1874 lprocfs_counter_add(sbi->ll_stats, op, count);
1876 EXPORT_SYMBOL(ll_stats_ops_tally);
1878 static const char *const ra_stat_string[] = {
1879 [RA_STAT_HIT] = "hits",
1880 [RA_STAT_MISS] = "misses",
1881 [RA_STAT_DISTANT_READPAGE] = "readpage_not_consecutive",
1882 [RA_STAT_MISS_IN_WINDOW] = "miss_inside_window",
1883 [RA_STAT_FAILED_GRAB_PAGE] = "failed_grab_cache_page",
1884 [RA_STAT_FAILED_MATCH] = "failed_lock_match",
1885 [RA_STAT_DISCARDED] = "read_but_discarded",
1886 [RA_STAT_ZERO_LEN] = "zero_length_file",
1887 [RA_STAT_ZERO_WINDOW] = "zero_size_window",
1888 [RA_STAT_EOF] = "readahead_to_eof",
1889 [RA_STAT_MAX_IN_FLIGHT] = "hit_max_readahead_issue",
1890 [RA_STAT_WRONG_GRAB_PAGE] = "wrong_page_from_grab_cache_page",
1891 [RA_STAT_FAILED_REACH_END] = "failed_to_reach_end",
1892 [RA_STAT_ASYNC] = "async_readahead",
1893 [RA_STAT_FAILED_FAST_READ] = "failed_to_fast_read",
1894 [RA_STAT_MMAP_RANGE_READ] = "mmap_range_read",
1897 int ll_debugfs_register_super(struct super_block *sb, const char *name)
1899 struct lustre_sb_info *lsi = s2lsi(sb);
1900 struct ll_sb_info *sbi = ll_s2sbi(sb);
1906 if (IS_ERR_OR_NULL(llite_root))
1909 sbi->ll_debugfs_entry = debugfs_create_dir(name, llite_root);
1910 ldebugfs_add_vars(sbi->ll_debugfs_entry, lprocfs_llite_obd_vars, sb);
1912 debugfs_create_file("dump_page_cache", 0444, sbi->ll_debugfs_entry, sbi,
1913 &vvp_dump_pgcache_file_ops);
1915 debugfs_create_file("extents_stats", 0644, sbi->ll_debugfs_entry, sbi,
1916 &ll_rw_extents_stats_fops);
1918 debugfs_create_file("extents_stats_per_process", 0644,
1919 sbi->ll_debugfs_entry, sbi,
1920 &ll_rw_extents_stats_pp_fops);
1922 debugfs_create_file("offset_stats", 0644, sbi->ll_debugfs_entry, sbi,
1923 &ll_rw_offset_stats_fops);
1925 /* File operations stats */
1926 sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
1927 LPROCFS_STATS_FLAG_NONE);
1928 if (sbi->ll_stats == NULL)
1929 GOTO(out_debugfs, err = -ENOMEM);
1931 /* do counter init */
1932 for (id = 0; id < LPROC_LL_FILE_OPCODES; id++)
1933 lprocfs_counter_init(sbi->ll_stats,
1934 llite_opcode_table[id].lfo_opcode,
1935 llite_opcode_table[id].lfo_config,
1936 llite_opcode_table[id].lfo_opname);
1938 debugfs_create_file("stats", 0644, sbi->ll_debugfs_entry,
1939 sbi->ll_stats, &ldebugfs_stats_seq_fops);
1941 sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1942 LPROCFS_STATS_FLAG_NONE);
1943 if (sbi->ll_ra_stats == NULL)
1944 GOTO(out_stats, err = -ENOMEM);
1946 for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1947 lprocfs_counter_init(sbi->ll_ra_stats, id, LPROCFS_TYPE_PAGES,
1948 ra_stat_string[id]);
1950 debugfs_create_file("read_ahead_stats", 0644, sbi->ll_debugfs_entry,
1951 sbi->ll_ra_stats, &ldebugfs_stats_seq_fops);
1954 /* Yes we also register sysfs mount kset here as well */
1955 sbi->ll_kset.kobj.parent = llite_kobj;
1956 sbi->ll_kset.kobj.ktype = &sbi_ktype;
1957 init_completion(&sbi->ll_kobj_unregister);
1958 err = kobject_set_name(&sbi->ll_kset.kobj, "%s", name);
1960 GOTO(out_ra_stats, err);
1962 err = kset_register(&sbi->ll_kset);
1964 GOTO(out_ra_stats, err);
1966 lsi->lsi_kobj = kobject_get(&sbi->ll_kset.kobj);
1970 lprocfs_free_stats(&sbi->ll_ra_stats);
1972 lprocfs_free_stats(&sbi->ll_stats);
1974 debugfs_remove_recursive(sbi->ll_debugfs_entry);
1979 void ll_debugfs_unregister_super(struct super_block *sb)
1981 struct lustre_sb_info *lsi = s2lsi(sb);
1982 struct ll_sb_info *sbi = ll_s2sbi(sb);
1984 debugfs_remove_recursive(sbi->ll_debugfs_entry);
1987 sysfs_remove_link(&sbi->ll_kset.kobj,
1988 sbi->ll_dt_obd->obd_type->typ_name);
1991 sysfs_remove_link(&sbi->ll_kset.kobj,
1992 sbi->ll_md_obd->obd_type->typ_name);
1994 kobject_put(lsi->lsi_kobj);
1996 kset_unregister(&sbi->ll_kset);
1997 wait_for_completion(&sbi->ll_kobj_unregister);
1999 lprocfs_free_stats(&sbi->ll_ra_stats);
2000 lprocfs_free_stats(&sbi->ll_stats);
2002 #undef MAX_STRING_SIZE
2004 static void ll_display_extents_info(struct ll_rw_extents_info *rw_extents,
2005 struct seq_file *seq, int which)
2007 unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
2008 unsigned long start, end, r, w;
2009 char *unitp = "KMGTPEZY";
2011 struct per_process_info *pp_info;
2013 pp_info = &rw_extents->pp_extents[which];
2018 for (i = 0; i < LL_HIST_MAX; i++) {
2019 read_tot += pp_info->pp_r_hist.oh_buckets[i];
2020 write_tot += pp_info->pp_w_hist.oh_buckets[i];
2023 for (i = 0; i < LL_HIST_MAX; i++) {
2024 r = pp_info->pp_r_hist.oh_buckets[i];
2025 w = pp_info->pp_w_hist.oh_buckets[i];
2028 end = 1 << (i + LL_HIST_START - units);
2029 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4u %4u | "
2030 "%14lu %4u %4u\n", start, *unitp, end, *unitp,
2031 (i == LL_HIST_MAX - 1) ? '+' : ' ',
2032 r, pct(r, read_tot), pct(read_cum, read_tot),
2033 w, pct(w, write_tot), pct(write_cum, write_tot));
2035 if (start == (1 << 10)) {
2040 if (read_cum == read_tot && write_cum == write_tot)
2045 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
2047 struct ll_sb_info *sbi = seq->private;
2048 struct ll_rw_extents_info *rw_extents = sbi->ll_rw_extents_info;
2051 if (!sbi->ll_rw_stats_on || !rw_extents) {
2052 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
2056 spin_lock(&sbi->ll_pp_extent_lock);
2057 lprocfs_stats_header(seq, ktime_get(), rw_extents->pp_init, 25, ":", 1);
2058 seq_printf(seq, "%15s %19s | %20s\n", " ", "read", "write");
2059 seq_printf(seq, "%13s %14s %4s %4s | %14s %4s %4s\n",
2060 "extents", "calls", "%", "cum%", "calls", "%", "cum%");
2062 for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
2063 if (rw_extents->pp_extents[k].pid != 0) {
2064 seq_printf(seq, "\nPID: %d\n",
2065 rw_extents->pp_extents[k].pid);
2066 ll_display_extents_info(rw_extents, seq, k);
2069 spin_unlock(&sbi->ll_pp_extent_lock);
2073 static int alloc_rw_stats_info(struct ll_sb_info *sbi)
2075 struct ll_rw_extents_info *rw_extents;
2076 struct ll_rw_process_info *offset;
2077 struct ll_rw_process_info *process;
2080 OBD_ALLOC(rw_extents, sizeof(*rw_extents));
2084 for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
2085 spin_lock_init(&rw_extents->pp_extents[i].pp_r_hist.oh_lock);
2086 spin_lock_init(&rw_extents->pp_extents[i].pp_w_hist.oh_lock);
2089 spin_lock(&sbi->ll_pp_extent_lock);
2090 if (!sbi->ll_rw_extents_info)
2091 sbi->ll_rw_extents_info = rw_extents;
2092 spin_unlock(&sbi->ll_pp_extent_lock);
2093 /* another writer allocated the struct before we got the lock */
2094 if (sbi->ll_rw_extents_info != rw_extents)
2095 OBD_FREE(rw_extents, sizeof(*rw_extents));
2097 OBD_ALLOC(process, sizeof(*process) * LL_PROCESS_HIST_MAX);
2099 GOTO(out, rc = -ENOMEM);
2100 OBD_ALLOC(offset, sizeof(*offset) * LL_OFFSET_HIST_MAX);
2102 GOTO(out_free, rc = -ENOMEM);
2104 spin_lock(&sbi->ll_process_lock);
2105 if (!sbi->ll_rw_process_info)
2106 sbi->ll_rw_process_info = process;
2107 if (!sbi->ll_rw_offset_info)
2108 sbi->ll_rw_offset_info = offset;
2109 spin_unlock(&sbi->ll_process_lock);
2111 /* another writer allocated the structs before we got the lock */
2112 if (sbi->ll_rw_offset_info != offset)
2113 OBD_FREE(offset, sizeof(*offset) * LL_OFFSET_HIST_MAX);
2114 if (sbi->ll_rw_process_info != process) {
2116 OBD_FREE(process, sizeof(*process) * LL_PROCESS_HIST_MAX);
2123 void ll_free_rw_stats_info(struct ll_sb_info *sbi)
2125 if (sbi->ll_rw_extents_info) {
2126 OBD_FREE(sbi->ll_rw_extents_info,
2127 sizeof(*sbi->ll_rw_extents_info));
2128 sbi->ll_rw_extents_info = NULL;
2130 if (sbi->ll_rw_offset_info) {
2131 OBD_FREE(sbi->ll_rw_offset_info,
2132 sizeof(*sbi->ll_rw_offset_info) * LL_OFFSET_HIST_MAX);
2133 sbi->ll_rw_offset_info = NULL;
2135 if (sbi->ll_rw_process_info) {
2136 OBD_FREE(sbi->ll_rw_process_info,
2137 sizeof(*sbi->ll_rw_process_info) * LL_PROCESS_HIST_MAX);
2138 sbi->ll_rw_process_info = NULL;
2142 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
2143 const char __user *buf,
2144 size_t len, loff_t *off)
2146 struct seq_file *seq = file->private_data;
2147 struct ll_sb_info *sbi = seq->private;
2148 struct ll_rw_extents_info *rw_extents;
2155 value = ll_stats_pid_write(buf, len);
2158 sbi->ll_rw_stats_on = 0;
2160 if (!sbi->ll_rw_extents_info) {
2161 int rc = alloc_rw_stats_info(sbi);
2166 sbi->ll_rw_stats_on = 1;
2170 spin_lock(&sbi->ll_pp_extent_lock);
2171 rw_extents = sbi->ll_rw_extents_info;
2173 rw_extents->pp_init = ktime_get();
2174 for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
2175 rw_extents->pp_extents[i].pid = 0;
2176 lprocfs_oh_clear(&rw_extents->pp_extents[i].pp_r_hist);
2177 lprocfs_oh_clear(&rw_extents->pp_extents[i].pp_w_hist);
2180 spin_unlock(&sbi->ll_pp_extent_lock);
2185 LDEBUGFS_SEQ_FOPS(ll_rw_extents_stats_pp);
2187 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
2189 struct ll_sb_info *sbi = seq->private;
2190 struct ll_rw_extents_info *rw_extents = sbi->ll_rw_extents_info;
2192 if (!sbi->ll_rw_stats_on || !rw_extents) {
2193 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
2197 spin_lock(&sbi->ll_lock);
2198 lprocfs_stats_header(seq, ktime_get(), rw_extents->pp_init, 25, ":", 1);
2200 seq_printf(seq, "%15s %19s | %20s\n", " ", "read", "write");
2201 seq_printf(seq, "%13s %14s %4s %4s | %14s %4s %4s\n",
2202 "extents", "calls", "%", "cum%",
2203 "calls", "%", "cum%");
2205 ll_display_extents_info(rw_extents, seq, LL_PROCESS_HIST_MAX);
2206 spin_unlock(&sbi->ll_lock);
2211 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
2212 const char __user *buf,
2213 size_t len, loff_t *off)
2215 struct seq_file *seq = file->private_data;
2216 struct ll_sb_info *sbi = seq->private;
2217 struct ll_rw_extents_info *rw_extents;
2224 value = ll_stats_pid_write(buf, len);
2227 sbi->ll_rw_stats_on = 0;
2229 if (!sbi->ll_rw_extents_info) {
2230 int rc = alloc_rw_stats_info(sbi);
2235 sbi->ll_rw_stats_on = 1;
2238 spin_lock(&sbi->ll_pp_extent_lock);
2239 rw_extents = sbi->ll_rw_extents_info;
2241 rw_extents->pp_init = ktime_get();
2242 for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
2243 rw_extents->pp_extents[i].pid = 0;
2244 lprocfs_oh_clear(&rw_extents->pp_extents[i].pp_r_hist);
2245 lprocfs_oh_clear(&rw_extents->pp_extents[i].pp_w_hist);
2248 spin_unlock(&sbi->ll_pp_extent_lock);
2253 LDEBUGFS_SEQ_FOPS(ll_rw_extents_stats);
2255 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
2256 struct ll_file_data *file, loff_t pos,
2257 size_t count, int rw)
2260 struct ll_rw_process_info *process;
2261 struct ll_rw_process_info *offset;
2262 int *off_count = &sbi->ll_rw_offset_entry_count;
2263 int *process_count = &sbi->ll_offset_process_count;
2264 struct ll_rw_extents_info *rw_extents;
2266 if (!sbi->ll_rw_stats_on)
2269 spin_lock(&sbi->ll_pp_extent_lock);
2270 rw_extents = sbi->ll_rw_extents_info;
2272 spin_unlock(&sbi->ll_pp_extent_lock);
2276 /* Extent statistics */
2277 for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
2278 if (rw_extents->pp_extents[i].pid == pid) {
2286 sbi->ll_extent_process_count =
2287 (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
2288 cur = sbi->ll_extent_process_count;
2289 rw_extents->pp_extents[cur].pid = pid;
2290 lprocfs_oh_clear(&rw_extents->pp_extents[cur].pp_r_hist);
2291 lprocfs_oh_clear(&rw_extents->pp_extents[cur].pp_w_hist);
2294 for (i = 0; (count >= 1 << (LL_HIST_START + i)) &&
2295 (i < (LL_HIST_MAX - 1)); i++);
2297 rw_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
2298 rw_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
2300 rw_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
2301 rw_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
2303 spin_unlock(&sbi->ll_pp_extent_lock);
2305 spin_lock(&sbi->ll_process_lock);
2306 process = sbi->ll_rw_process_info;
2307 offset = sbi->ll_rw_offset_info;
2308 if (!process || !offset)
2311 /* Offset statistics */
2312 for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
2313 if (process[i].rw_pid == pid) {
2314 if (process[i].rw_last_file != file) {
2315 process[i].rw_range_start = pos;
2316 process[i].rw_last_file_pos = pos + count;
2317 process[i].rw_smallest_extent = count;
2318 process[i].rw_largest_extent = count;
2319 process[i].rw_offset = 0;
2320 process[i].rw_last_file = file;
2323 if (process[i].rw_last_file_pos != pos) {
2325 (*off_count + 1) % LL_OFFSET_HIST_MAX;
2326 offset[*off_count].rw_op = process[i].rw_op;
2327 offset[*off_count].rw_pid = pid;
2328 offset[*off_count].rw_range_start =
2329 process[i].rw_range_start;
2330 offset[*off_count].rw_range_end =
2331 process[i].rw_last_file_pos;
2332 offset[*off_count].rw_smallest_extent =
2333 process[i].rw_smallest_extent;
2334 offset[*off_count].rw_largest_extent =
2335 process[i].rw_largest_extent;
2336 offset[*off_count].rw_offset =
2337 process[i].rw_offset;
2338 process[i].rw_op = rw;
2339 process[i].rw_range_start = pos;
2340 process[i].rw_smallest_extent = count;
2341 process[i].rw_largest_extent = count;
2342 process[i].rw_offset = pos -
2343 process[i].rw_last_file_pos;
2345 if (process[i].rw_smallest_extent > count)
2346 process[i].rw_smallest_extent = count;
2347 if (process[i].rw_largest_extent < count)
2348 process[i].rw_largest_extent = count;
2349 process[i].rw_last_file_pos = pos + count;
2353 *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
2354 process[*process_count].rw_pid = pid;
2355 process[*process_count].rw_op = rw;
2356 process[*process_count].rw_range_start = pos;
2357 process[*process_count].rw_last_file_pos = pos + count;
2358 process[*process_count].rw_smallest_extent = count;
2359 process[*process_count].rw_largest_extent = count;
2360 process[*process_count].rw_offset = 0;
2361 process[*process_count].rw_last_file = file;
2364 spin_unlock(&sbi->ll_process_lock);
2367 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
2369 struct ll_sb_info *sbi = seq->private;
2370 struct ll_rw_process_info *offset;
2371 struct ll_rw_process_info *process;
2374 if (!sbi->ll_rw_stats_on) {
2375 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
2379 spin_lock(&sbi->ll_process_lock);
2380 lprocfs_stats_header(seq, ktime_get(), sbi->ll_process_stats_init, 25,
2382 seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
2383 "R/W", "PID", "RANGE START", "RANGE END",
2384 "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
2386 /* We stored the discontiguous offsets here; print them first */
2387 offset = sbi->ll_rw_offset_info;
2388 for (i = 0; offset && i < LL_OFFSET_HIST_MAX; i++) {
2389 if (offset[i].rw_pid != 0)
2391 "%3c %10d %14llu %14llu %17lu %17lu %14lld\n",
2392 offset[i].rw_op == READ ? 'R' : 'W',
2394 offset[i].rw_range_start,
2395 offset[i].rw_range_end,
2396 (unsigned long)offset[i].rw_smallest_extent,
2397 (unsigned long)offset[i].rw_largest_extent,
2398 offset[i].rw_offset);
2401 /* Then print the current offsets for each process */
2402 process = sbi->ll_rw_process_info;
2403 for (i = 0; process && i < LL_PROCESS_HIST_MAX; i++) {
2404 if (process[i].rw_pid != 0)
2406 "%3c %10d %14llu %14llu %17lu %17lu %14lld\n",
2407 process[i].rw_op == READ ? 'R' : 'W',
2409 process[i].rw_range_start,
2410 process[i].rw_last_file_pos,
2411 (unsigned long)process[i].rw_smallest_extent,
2412 (unsigned long)process[i].rw_largest_extent,
2413 process[i].rw_offset);
2415 spin_unlock(&sbi->ll_process_lock);
2420 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
2421 const char __user *buf,
2422 size_t len, loff_t *off)
2424 struct seq_file *seq = file->private_data;
2425 struct ll_sb_info *sbi = seq->private;
2431 value = ll_stats_pid_write(buf, len);
2434 sbi->ll_rw_stats_on = 0;
2436 if (!sbi->ll_rw_process_info || !sbi->ll_rw_offset_info) {
2437 int rc = alloc_rw_stats_info(sbi);
2442 sbi->ll_rw_stats_on = 1;
2445 spin_lock(&sbi->ll_process_lock);
2446 sbi->ll_offset_process_count = 0;
2447 sbi->ll_rw_offset_entry_count = 0;
2448 sbi->ll_process_stats_init = ktime_get();
2449 if (sbi->ll_rw_process_info)
2450 memset(sbi->ll_rw_process_info, 0,
2451 sizeof(struct ll_rw_process_info) * LL_PROCESS_HIST_MAX);
2452 if (sbi->ll_rw_offset_info)
2453 memset(sbi->ll_rw_offset_info, 0,
2454 sizeof(struct ll_rw_process_info) * LL_OFFSET_HIST_MAX);
2455 spin_unlock(&sbi->ll_process_lock);
2460 LDEBUGFS_SEQ_FOPS(ll_rw_offset_stats);