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/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 #define DEBUG_SUBSYSTEM S_LLITE
34 #include <linux/version.h>
35 #include <linux/user_namespace.h>
36 #ifdef HAVE_UIDGID_HEADER
37 # include <linux/uidgid.h>
39 #include <uapi/linux/lustre/lustre_param.h>
40 #include <lprocfs_status.h>
41 #include <obd_support.h>
43 #include "llite_internal.h"
44 #include "vvp_internal.h"
46 struct proc_dir_entry *proc_lustre_fs_root;
47 static struct kobject *llite_kobj;
49 int llite_tunables_register(void)
53 proc_lustre_fs_root = lprocfs_register("llite", proc_lustre_root,
55 if (IS_ERR(proc_lustre_fs_root)) {
56 rc = PTR_ERR(proc_lustre_fs_root);
57 CERROR("cannot register '/proc/fs/lustre/llite': rc = %d\n",
59 proc_lustre_fs_root = NULL;
63 llite_kobj = class_setup_tunables("llite");
64 if (IS_ERR(llite_kobj)) {
65 rc = PTR_ERR(llite_kobj);
72 void llite_tunables_unregister(void)
75 kobject_put(llite_kobj);
77 lprocfs_remove(&proc_lustre_fs_root);
81 /* /proc/lustre/llite mount point registration */
82 static const struct file_operations ll_rw_extents_stats_fops;
83 static const struct file_operations ll_rw_extents_stats_pp_fops;
84 static const struct file_operations ll_rw_offset_stats_fops;
85 static __s64 ll_stats_pid_write(const char __user *buf, size_t len);
87 static ssize_t blocksize_show(struct kobject *kobj, struct attribute *attr,
90 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
92 struct obd_statfs osfs;
95 rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
99 return sprintf(buf, "%u\n", osfs.os_bsize);
101 LUSTRE_RO_ATTR(blocksize);
103 static int ll_stat_blksize_seq_show(struct seq_file *m, void *v)
105 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
107 seq_printf(m, "%u\n", sbi->ll_stat_blksize);
112 static ssize_t ll_stat_blksize_seq_write(struct file *file,
113 const char __user *buffer,
114 size_t count, loff_t *off)
116 struct seq_file *m = file->private_data;
117 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
121 rc = kstrtouint_from_user(buffer, count, 0, &val);
125 if (val != 0 && (val < PAGE_SIZE || (val & (val - 1))) != 0)
128 sbi->ll_stat_blksize = val;
132 LPROC_SEQ_FOPS(ll_stat_blksize);
134 static ssize_t kbytestotal_show(struct kobject *kobj, struct attribute *attr,
137 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
139 struct obd_statfs osfs;
144 rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
148 blk_size = osfs.os_bsize >> 10;
149 result = osfs.os_blocks;
151 while (blk_size >>= 1)
154 return sprintf(buf, "%llu\n", result);
156 LUSTRE_RO_ATTR(kbytestotal);
158 static ssize_t kbytesfree_show(struct kobject *kobj, struct attribute *attr,
161 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
163 struct obd_statfs osfs;
168 rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
172 blk_size = osfs.os_bsize >> 10;
173 result = osfs.os_bfree;
175 while (blk_size >>= 1)
178 return sprintf(buf, "%llu\n", result);
180 LUSTRE_RO_ATTR(kbytesfree);
182 static ssize_t kbytesavail_show(struct kobject *kobj, struct attribute *attr,
185 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
187 struct obd_statfs osfs;
192 rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
196 blk_size = osfs.os_bsize >> 10;
197 result = osfs.os_bavail;
199 while (blk_size >>= 1)
202 return sprintf(buf, "%llu\n", result);
204 LUSTRE_RO_ATTR(kbytesavail);
206 static ssize_t filestotal_show(struct kobject *kobj, struct attribute *attr,
209 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
211 struct obd_statfs osfs;
214 rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
218 return sprintf(buf, "%llu\n", osfs.os_files);
220 LUSTRE_RO_ATTR(filestotal);
222 static ssize_t filesfree_show(struct kobject *kobj, struct attribute *attr,
225 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
227 struct obd_statfs osfs;
230 rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY);
234 return sprintf(buf, "%llu\n", osfs.os_ffree);
236 LUSTRE_RO_ATTR(filesfree);
238 static ssize_t client_type_show(struct kobject *kobj, struct attribute *attr,
241 return sprintf(buf, "local client\n");
243 LUSTRE_RO_ATTR(client_type);
245 static ssize_t fstype_show(struct kobject *kobj, struct attribute *attr,
248 return sprintf(buf, "lustre\n");
250 LUSTRE_RO_ATTR(fstype);
252 static ssize_t uuid_show(struct kobject *kobj, struct attribute *attr,
255 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
258 return sprintf(buf, "%s\n", sbi->ll_sb_uuid.uuid);
260 LUSTRE_RO_ATTR(uuid);
262 static int ll_xattr_cache_seq_show(struct seq_file *m, void *v)
264 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
266 seq_printf(m, "%u\n", sbi->ll_xattr_cache_enabled);
270 static ssize_t ll_xattr_cache_seq_write(struct file *file,
271 const char __user *buffer,
272 size_t count, loff_t *off)
274 struct seq_file *m = file->private_data;
275 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
279 rc = kstrtobool_from_user(buffer, count, &val);
283 if (val && !(sbi->ll_flags & LL_SBI_XATTR_CACHE))
286 sbi->ll_xattr_cache_enabled = val;
287 sbi->ll_xattr_cache_set = 1;
291 LPROC_SEQ_FOPS(ll_xattr_cache);
293 static int ll_site_stats_seq_show(struct seq_file *m, void *v)
295 struct super_block *sb = m->private;
298 * See description of statistical counters in struct cl_site, and
301 return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site), m);
303 LPROC_SEQ_FOPS_RO(ll_site_stats);
305 static int ll_max_readahead_mb_seq_show(struct seq_file *m, void *v)
307 struct super_block *sb = m->private;
308 struct ll_sb_info *sbi = ll_s2sbi(sb);
312 spin_lock(&sbi->ll_lock);
313 pages_number = sbi->ll_ra_info.ra_max_pages;
314 spin_unlock(&sbi->ll_lock);
316 mult = 1 << (20 - PAGE_SHIFT);
317 return lprocfs_seq_read_frac_helper(m, pages_number, mult);
321 ll_max_readahead_mb_seq_write(struct file *file, const char __user *buffer,
322 size_t count, loff_t *off)
324 struct seq_file *m = file->private_data;
325 struct super_block *sb = m->private;
326 struct ll_sb_info *sbi = ll_s2sbi(sb);
330 rc = lprocfs_str_with_units_to_s64(buffer, count, &pages_number, 'M');
334 pages_number >>= PAGE_SHIFT;
336 if (pages_number < 0 || pages_number > totalram_pages / 2) {
338 CERROR("%s: can't set max_readahead_mb=%lu > %luMB\n",
339 ll_get_fsname(sb, NULL, 0),
340 (unsigned long)pages_number >> (20 - PAGE_SHIFT),
341 totalram_pages >> (20 - PAGE_SHIFT + 1));
345 spin_lock(&sbi->ll_lock);
346 sbi->ll_ra_info.ra_max_pages = pages_number;
347 spin_unlock(&sbi->ll_lock);
350 LPROC_SEQ_FOPS(ll_max_readahead_mb);
352 static int ll_max_readahead_per_file_mb_seq_show(struct seq_file *m, void *v)
354 struct super_block *sb = m->private;
355 struct ll_sb_info *sbi = ll_s2sbi(sb);
359 spin_lock(&sbi->ll_lock);
360 pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
361 spin_unlock(&sbi->ll_lock);
363 mult = 1 << (20 - PAGE_SHIFT);
364 return lprocfs_seq_read_frac_helper(m, pages_number, mult);
368 ll_max_readahead_per_file_mb_seq_write(struct file *file,
369 const char __user *buffer,
370 size_t count, loff_t *off)
372 struct seq_file *m = file->private_data;
373 struct super_block *sb = m->private;
374 struct ll_sb_info *sbi = ll_s2sbi(sb);
378 rc = lprocfs_str_with_units_to_s64(buffer, count, &pages_number, 'M');
382 pages_number >>= PAGE_SHIFT;
384 if (pages_number < 0 || pages_number > sbi->ll_ra_info.ra_max_pages) {
385 CERROR("%s: can't set max_readahead_per_file_mb=%lu > "
386 "max_read_ahead_mb=%lu\n", ll_get_fsname(sb, NULL, 0),
387 (unsigned long)pages_number >> (20 - PAGE_SHIFT),
388 sbi->ll_ra_info.ra_max_pages >> (20 - PAGE_SHIFT));
392 spin_lock(&sbi->ll_lock);
393 sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
394 spin_unlock(&sbi->ll_lock);
397 LPROC_SEQ_FOPS(ll_max_readahead_per_file_mb);
399 static int ll_max_read_ahead_whole_mb_seq_show(struct seq_file *m, void *v)
401 struct super_block *sb = m->private;
402 struct ll_sb_info *sbi = ll_s2sbi(sb);
406 spin_lock(&sbi->ll_lock);
407 pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
408 spin_unlock(&sbi->ll_lock);
410 mult = 1 << (20 - PAGE_SHIFT);
411 return lprocfs_seq_read_frac_helper(m, pages_number, mult);
415 ll_max_read_ahead_whole_mb_seq_write(struct file *file,
416 const char __user *buffer,
417 size_t count, loff_t *off)
419 struct seq_file *m = file->private_data;
420 struct super_block *sb = m->private;
421 struct ll_sb_info *sbi = ll_s2sbi(sb);
425 rc = lprocfs_str_with_units_to_s64(buffer, count, &pages_number, 'M');
429 pages_number >>= PAGE_SHIFT;
431 /* Cap this at the current max readahead window size, the readahead
432 * algorithm does this anyway so it's pointless to set it larger. */
433 if (pages_number < 0 ||
434 pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
435 int pages_shift = 20 - PAGE_SHIFT;
436 CERROR("%s: can't set max_read_ahead_whole_mb=%lu > "
437 "max_read_ahead_per_file_mb=%lu\n",
438 ll_get_fsname(sb, NULL, 0),
439 (unsigned long)pages_number >> pages_shift,
440 sbi->ll_ra_info.ra_max_pages_per_file >> pages_shift);
444 spin_lock(&sbi->ll_lock);
445 sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
446 spin_unlock(&sbi->ll_lock);
449 LPROC_SEQ_FOPS(ll_max_read_ahead_whole_mb);
451 static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v)
453 struct super_block *sb = m->private;
454 struct ll_sb_info *sbi = ll_s2sbi(sb);
455 struct cl_client_cache *cache = sbi->ll_cache;
456 int shift = 20 - PAGE_SHIFT;
460 max_cached_mb = cache->ccc_lru_max >> shift;
461 unused_mb = atomic_long_read(&cache->ccc_lru_left) >> shift;
462 seq_printf(m, "users: %d\n"
463 "max_cached_mb: %ld\n"
466 "reclaim_count: %u\n",
467 atomic_read(&cache->ccc_users),
469 max_cached_mb - unused_mb,
471 cache->ccc_lru_shrinkers);
476 ll_max_cached_mb_seq_write(struct file *file, const char __user *buffer,
477 size_t count, loff_t *off)
479 struct seq_file *m = file->private_data;
480 struct super_block *sb = m->private;
481 struct ll_sb_info *sbi = ll_s2sbi(sb);
482 struct cl_client_cache *cache = sbi->ll_cache;
492 if (count >= sizeof(kernbuf))
495 if (copy_from_user(kernbuf, buffer, count))
499 buffer += lprocfs_find_named_value(kernbuf, "max_cached_mb:", &count) -
501 rc = lprocfs_str_with_units_to_s64(buffer, count, &pages_number, 'M');
505 pages_number >>= PAGE_SHIFT;
507 if (pages_number < 0 || pages_number > totalram_pages) {
508 CERROR("%s: can't set max cache more than %lu MB\n",
509 ll_get_fsname(sb, NULL, 0),
510 totalram_pages >> (20 - PAGE_SHIFT));
513 /* Allow enough cache so clients can make well-formed RPCs */
514 pages_number = max_t(long, pages_number, PTLRPC_MAX_BRW_PAGES);
516 spin_lock(&sbi->ll_lock);
517 diff = pages_number - cache->ccc_lru_max;
518 spin_unlock(&sbi->ll_lock);
520 /* easy - add more LRU slots. */
522 atomic_long_add(diff, &cache->ccc_lru_left);
526 env = cl_env_get(&refcheck);
534 /* reduce LRU budget from free slots. */
538 ov = atomic_long_read(&cache->ccc_lru_left);
542 nv = ov > diff ? ov - diff : 0;
543 rc = atomic_long_cmpxchg(&cache->ccc_lru_left, ov, nv);
544 if (likely(ov == rc)) {
554 if (sbi->ll_dt_exp == NULL) { /* being initialized */
559 /* difficult - have to ask OSCs to drop LRU slots. */
561 rc = obd_set_info_async(env, sbi->ll_dt_exp,
562 sizeof(KEY_CACHE_LRU_SHRINK),
563 KEY_CACHE_LRU_SHRINK,
564 sizeof(tmp), &tmp, NULL);
568 cl_env_put(env, &refcheck);
572 spin_lock(&sbi->ll_lock);
573 cache->ccc_lru_max = pages_number;
574 spin_unlock(&sbi->ll_lock);
577 atomic_long_add(nrpages, &cache->ccc_lru_left);
581 LPROC_SEQ_FOPS(ll_max_cached_mb);
583 static ssize_t checksum_pages_show(struct kobject *kobj, struct attribute *attr,
586 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
589 return sprintf(buf, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
592 static ssize_t checksum_pages_store(struct kobject *kobj,
593 struct attribute *attr,
597 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
607 rc = kstrtobool(buffer, &val);
611 sbi->ll_flags |= LL_SBI_CHECKSUM;
613 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
616 rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
617 KEY_CHECKSUM, sizeof(tmp), &tmp, NULL);
619 CWARN("Failed to set OSC checksum flags: %d\n", rc);
623 LUSTRE_RW_ATTR(checksum_pages);
625 static ssize_t ll_rd_track_id(struct kobject *kobj, char *buf,
626 enum stats_track_type type)
628 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
631 if (sbi->ll_stats_track_type == type)
632 return sprintf(buf, "%d\n", sbi->ll_stats_track_id);
633 else if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
634 return sprintf(buf, "0 (all)\n");
636 return sprintf(buf, "untracked\n");
639 static ssize_t ll_wr_track_id(struct kobject *kobj, const char *buffer,
640 size_t count, enum stats_track_type type)
642 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
647 rc = kstrtoul(buffer, 10, &pid);
651 sbi->ll_stats_track_id = pid;
653 sbi->ll_stats_track_type = STATS_TRACK_ALL;
655 sbi->ll_stats_track_type = type;
656 lprocfs_clear_stats(sbi->ll_stats);
660 static ssize_t stats_track_pid_show(struct kobject *kobj,
661 struct attribute *attr,
664 return ll_rd_track_id(kobj, buf, STATS_TRACK_PID);
667 static ssize_t stats_track_pid_store(struct kobject *kobj,
668 struct attribute *attr,
672 return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PID);
674 LUSTRE_RW_ATTR(stats_track_pid);
676 static ssize_t stats_track_ppid_show(struct kobject *kobj,
677 struct attribute *attr,
680 return ll_rd_track_id(kobj, buf, STATS_TRACK_PPID);
683 static ssize_t stats_track_ppid_store(struct kobject *kobj,
684 struct attribute *attr,
688 return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PPID);
690 LUSTRE_RW_ATTR(stats_track_ppid);
692 static ssize_t stats_track_gid_show(struct kobject *kobj,
693 struct attribute *attr,
696 return ll_rd_track_id(kobj, buf, STATS_TRACK_GID);
699 static ssize_t stats_track_gid_store(struct kobject *kobj,
700 struct attribute *attr,
704 return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_GID);
706 LUSTRE_RW_ATTR(stats_track_gid);
708 static ssize_t statahead_running_max_show(struct kobject *kobj,
709 struct attribute *attr,
712 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
715 return snprintf(buf, 16, "%u\n", sbi->ll_sa_running_max);
718 static ssize_t statahead_running_max_store(struct kobject *kobj,
719 struct attribute *attr,
723 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
728 rc = kstrtoul(buffer, 0, &val);
732 if (val <= LL_SA_RUNNING_MAX) {
733 sbi->ll_sa_running_max = val;
737 CERROR("Bad statahead_running_max value %lu. Valid values "
738 "are in the range [0, %d]\n", val, LL_SA_RUNNING_MAX);
742 LUSTRE_RW_ATTR(statahead_running_max);
744 static ssize_t statahead_max_show(struct kobject *kobj,
745 struct attribute *attr,
748 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
751 return sprintf(buf, "%u\n", sbi->ll_sa_max);
754 static ssize_t statahead_max_store(struct kobject *kobj,
755 struct attribute *attr,
759 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
764 rc = kstrtoul(buffer, 0, &val);
768 if (val <= LL_SA_RPC_MAX)
769 sbi->ll_sa_max = val;
771 CERROR("Bad statahead_max value %lu. Valid values are in the range [0, %d]\n",
776 LUSTRE_RW_ATTR(statahead_max);
778 static ssize_t statahead_agl_show(struct kobject *kobj,
779 struct attribute *attr,
782 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
785 return sprintf(buf, "%u\n", sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
788 static ssize_t statahead_agl_store(struct kobject *kobj,
789 struct attribute *attr,
793 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
798 rc = kstrtobool(buffer, &val);
803 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
805 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
809 LUSTRE_RW_ATTR(statahead_agl);
811 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
813 struct super_block *sb = m->private;
814 struct ll_sb_info *sbi = ll_s2sbi(sb);
816 seq_printf(m, "statahead total: %u\n"
817 "statahead wrong: %u\n"
819 atomic_read(&sbi->ll_sa_total),
820 atomic_read(&sbi->ll_sa_wrong),
821 atomic_read(&sbi->ll_agl_total));
824 LPROC_SEQ_FOPS_RO(ll_statahead_stats);
826 static int ll_lazystatfs_seq_show(struct seq_file *m, void *v)
828 struct super_block *sb = m->private;
829 struct ll_sb_info *sbi = ll_s2sbi(sb);
831 seq_printf(m, "%u\n",
832 (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
836 static ssize_t ll_lazystatfs_seq_write(struct file *file,
837 const char __user *buffer,
838 size_t count, loff_t *off)
840 struct seq_file *m = file->private_data;
841 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
845 rc = kstrtobool_from_user(buffer, count, &val);
850 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
852 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
856 LPROC_SEQ_FOPS(ll_lazystatfs);
858 static int ll_max_easize_seq_show(struct seq_file *m, void *v)
860 struct super_block *sb = m->private;
861 struct ll_sb_info *sbi = ll_s2sbi(sb);
865 rc = ll_get_max_mdsize(sbi, &ealen);
869 seq_printf(m, "%u\n", ealen);
872 LPROC_SEQ_FOPS_RO(ll_max_easize);
875 * Get default_easize.
877 * \see client_obd::cl_default_mds_easize
879 * \param[in] m seq_file handle
880 * \param[in] v unused for single entry
882 * \retval 0 on success
883 * \retval negative negated errno on failure
885 static int ll_default_easize_seq_show(struct seq_file *m, void *v)
887 struct super_block *sb = m->private;
888 struct ll_sb_info *sbi = ll_s2sbi(sb);
892 rc = ll_get_default_mdsize(sbi, &ealen);
896 seq_printf(m, "%u\n", ealen);
901 * Set default_easize.
903 * Range checking on the passed value is handled by
904 * ll_set_default_mdsize().
906 * \see client_obd::cl_default_mds_easize
908 * \param[in] file proc file
909 * \param[in] buffer string passed from user space
910 * \param[in] count \a buffer length
911 * \param[in] off unused for single entry
913 * \retval positive \a count on success
914 * \retval negative negated errno on failure
916 static ssize_t ll_default_easize_seq_write(struct file *file,
917 const char __user *buffer,
918 size_t count, loff_t *unused)
920 struct seq_file *seq = file->private_data;
921 struct super_block *sb = (struct super_block *)seq->private;
922 struct ll_sb_info *sbi = ll_s2sbi(sb);
929 rc = kstrtouint_from_user(buffer, count, 0, &val);
933 rc = ll_set_default_mdsize(sbi, val);
939 LPROC_SEQ_FOPS(ll_default_easize);
941 static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
943 const char *str[] = LL_SBI_FLAGS;
944 struct super_block *sb = m->private;
945 int flags = ll_s2sbi(sb)->ll_flags;
949 if (ARRAY_SIZE(str) <= i) {
950 CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
951 "flags please.\n", ll_get_fsname(sb, NULL, 0));
956 seq_printf(m, "%s ", str[i]);
960 seq_printf(m, "\b\n");
963 LPROC_SEQ_FOPS_RO(ll_sbi_flags);
965 static int ll_tiny_write_seq_show(struct seq_file *m, void *v)
967 struct super_block *sb = m->private;
968 struct ll_sb_info *sbi = ll_s2sbi(sb);
970 seq_printf(m, "%u\n", !!(sbi->ll_flags & LL_SBI_TINY_WRITE));
974 static ssize_t ll_tiny_write_seq_write(
975 struct file *file, const char __user *buffer, size_t count, loff_t *off)
977 struct seq_file *m = file->private_data;
978 struct super_block *sb = m->private;
979 struct ll_sb_info *sbi = ll_s2sbi(sb);
983 rc = kstrtobool_from_user(buffer, count, &val);
987 spin_lock(&sbi->ll_lock);
989 sbi->ll_flags |= LL_SBI_TINY_WRITE;
991 sbi->ll_flags &= ~LL_SBI_TINY_WRITE;
992 spin_unlock(&sbi->ll_lock);
996 LPROC_SEQ_FOPS(ll_tiny_write);
998 static int ll_fast_read_seq_show(struct seq_file *m, void *v)
1000 struct super_block *sb = m->private;
1001 struct ll_sb_info *sbi = ll_s2sbi(sb);
1003 seq_printf(m, "%u\n", !!(sbi->ll_flags & LL_SBI_FAST_READ));
1008 ll_fast_read_seq_write(struct file *file, const char __user *buffer,
1009 size_t count, loff_t *off)
1011 struct seq_file *m = file->private_data;
1012 struct super_block *sb = m->private;
1013 struct ll_sb_info *sbi = ll_s2sbi(sb);
1017 rc = kstrtobool_from_user(buffer, count, &val);
1021 spin_lock(&sbi->ll_lock);
1023 sbi->ll_flags |= LL_SBI_FAST_READ;
1025 sbi->ll_flags &= ~LL_SBI_FAST_READ;
1026 spin_unlock(&sbi->ll_lock);
1030 LPROC_SEQ_FOPS(ll_fast_read);
1032 static int ll_pio_seq_show(struct seq_file *m, void *v)
1034 struct super_block *sb = m->private;
1035 struct ll_sb_info *sbi = ll_s2sbi(sb);
1037 seq_printf(m, "%u\n", !!(sbi->ll_flags & LL_SBI_PIO));
1041 static ssize_t ll_pio_seq_write(struct file *file, const char __user *buffer,
1042 size_t count, loff_t *off)
1044 struct seq_file *m = file->private_data;
1045 struct super_block *sb = m->private;
1046 struct ll_sb_info *sbi = ll_s2sbi(sb);
1050 rc = kstrtobool_from_user(buffer, count, &val);
1054 spin_lock(&sbi->ll_lock);
1056 sbi->ll_flags |= LL_SBI_PIO;
1058 sbi->ll_flags &= ~LL_SBI_PIO;
1059 spin_unlock(&sbi->ll_lock);
1063 LPROC_SEQ_FOPS(ll_pio);
1065 static int ll_unstable_stats_seq_show(struct seq_file *m, void *v)
1067 struct super_block *sb = m->private;
1068 struct ll_sb_info *sbi = ll_s2sbi(sb);
1069 struct cl_client_cache *cache = sbi->ll_cache;
1073 pages = atomic_long_read(&cache->ccc_unstable_nr);
1074 mb = (pages * PAGE_SIZE) >> 20;
1076 seq_printf(m, "unstable_check: %8d\n"
1077 "unstable_pages: %12ld\n"
1078 "unstable_mb: %8d\n",
1079 cache->ccc_unstable_check, pages, mb);
1083 static ssize_t ll_unstable_stats_seq_write(struct file *file,
1084 const char __user *buffer,
1085 size_t count, loff_t *unused)
1087 struct seq_file *seq = file->private_data;
1088 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)seq->private);
1095 if (count >= sizeof(kernbuf))
1098 if (copy_from_user(kernbuf, buffer, count))
1102 buffer += lprocfs_find_named_value(kernbuf, "unstable_check:", &count) -
1104 rc = kstrtobool_from_user(buffer, count, &val);
1108 /* borrow lru lock to set the value */
1109 spin_lock(&sbi->ll_cache->ccc_lru_lock);
1110 sbi->ll_cache->ccc_unstable_check = val;
1111 spin_unlock(&sbi->ll_cache->ccc_lru_lock);
1115 LPROC_SEQ_FOPS(ll_unstable_stats);
1117 static int ll_root_squash_seq_show(struct seq_file *m, void *v)
1119 struct super_block *sb = m->private;
1120 struct ll_sb_info *sbi = ll_s2sbi(sb);
1121 struct root_squash_info *squash = &sbi->ll_squash;
1123 seq_printf(m, "%u:%u\n", squash->rsi_uid, squash->rsi_gid);
1127 static ssize_t ll_root_squash_seq_write(struct file *file,
1128 const char __user *buffer,
1129 size_t count, loff_t *off)
1131 struct seq_file *m = file->private_data;
1132 struct super_block *sb = m->private;
1133 struct ll_sb_info *sbi = ll_s2sbi(sb);
1134 struct root_squash_info *squash = &sbi->ll_squash;
1136 return lprocfs_wr_root_squash(buffer, count, squash,
1137 ll_get_fsname(sb, NULL, 0));
1139 LPROC_SEQ_FOPS(ll_root_squash);
1141 static int ll_nosquash_nids_seq_show(struct seq_file *m, void *v)
1143 struct super_block *sb = m->private;
1144 struct ll_sb_info *sbi = ll_s2sbi(sb);
1145 struct root_squash_info *squash = &sbi->ll_squash;
1148 down_read(&squash->rsi_sem);
1149 if (!list_empty(&squash->rsi_nosquash_nids)) {
1150 len = cfs_print_nidlist(m->buf + m->count, m->size - m->count,
1151 &squash->rsi_nosquash_nids);
1155 seq_puts(m, "NONE\n");
1157 up_read(&squash->rsi_sem);
1162 static ssize_t ll_nosquash_nids_seq_write(struct file *file,
1163 const char __user *buffer,
1164 size_t count, loff_t *off)
1166 struct seq_file *m = file->private_data;
1167 struct super_block *sb = m->private;
1168 struct ll_sb_info *sbi = ll_s2sbi(sb);
1169 struct root_squash_info *squash = &sbi->ll_squash;
1172 rc = lprocfs_wr_nosquash_nids(buffer, count, squash,
1173 ll_get_fsname(sb, NULL, 0));
1177 ll_compute_rootsquash_state(sbi);
1181 LPROC_SEQ_FOPS(ll_nosquash_nids);
1183 struct lprocfs_vars lprocfs_llite_obd_vars[] = {
1185 .fops = &ll_site_stats_fops },
1186 { .name = "stat_blocksize",
1187 .fops = &ll_stat_blksize_fops },
1188 { .name = "max_read_ahead_mb",
1189 .fops = &ll_max_readahead_mb_fops },
1190 { .name = "max_read_ahead_per_file_mb",
1191 .fops = &ll_max_readahead_per_file_mb_fops },
1192 { .name = "max_read_ahead_whole_mb",
1193 .fops = &ll_max_read_ahead_whole_mb_fops },
1194 { .name = "max_cached_mb",
1195 .fops = &ll_max_cached_mb_fops },
1196 { .name = "statahead_stats",
1197 .fops = &ll_statahead_stats_fops },
1198 { .name = "lazystatfs",
1199 .fops = &ll_lazystatfs_fops },
1200 { .name = "max_easize",
1201 .fops = &ll_max_easize_fops },
1202 { .name = "default_easize",
1203 .fops = &ll_default_easize_fops },
1204 { .name = "sbi_flags",
1205 .fops = &ll_sbi_flags_fops },
1206 { .name = "xattr_cache",
1207 .fops = &ll_xattr_cache_fops },
1208 { .name = "unstable_stats",
1209 .fops = &ll_unstable_stats_fops },
1210 { .name = "root_squash",
1211 .fops = &ll_root_squash_fops },
1212 { .name = "nosquash_nids",
1213 .fops = &ll_nosquash_nids_fops },
1214 { .name = "fast_read",
1215 .fops = &ll_fast_read_fops, },
1217 .fops = &ll_pio_fops, },
1218 { .name = "tiny_write",
1219 .fops = &ll_tiny_write_fops, },
1223 #define MAX_STRING_SIZE 128
1225 static struct attribute *llite_attrs[] = {
1226 &lustre_attr_blocksize.attr,
1227 &lustre_attr_kbytestotal.attr,
1228 &lustre_attr_kbytesfree.attr,
1229 &lustre_attr_kbytesavail.attr,
1230 &lustre_attr_filestotal.attr,
1231 &lustre_attr_filesfree.attr,
1232 &lustre_attr_client_type.attr,
1233 &lustre_attr_fstype.attr,
1234 &lustre_attr_uuid.attr,
1235 &lustre_attr_checksum_pages.attr,
1236 &lustre_attr_stats_track_pid.attr,
1237 &lustre_attr_stats_track_ppid.attr,
1238 &lustre_attr_stats_track_gid.attr,
1239 &lustre_attr_statahead_running_max.attr,
1240 &lustre_attr_statahead_max.attr,
1241 &lustre_attr_statahead_agl.attr,
1245 static void llite_kobj_release(struct kobject *kobj)
1247 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
1249 complete(&sbi->ll_kobj_unregister);
1252 static struct kobj_type llite_ktype = {
1253 .default_attrs = llite_attrs,
1254 .sysfs_ops = &lustre_sysfs_ops,
1255 .release = llite_kobj_release,
1258 static const struct llite_file_opcode {
1262 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
1263 /* file operation */
1264 { LPROC_LL_DIRTY_HITS, LPROCFS_TYPE_REGS, "dirty_pages_hits" },
1265 { LPROC_LL_DIRTY_MISSES, LPROCFS_TYPE_REGS, "dirty_pages_misses" },
1266 { LPROC_LL_READ_BYTES, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
1268 { LPROC_LL_WRITE_BYTES, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
1270 { LPROC_LL_BRW_READ, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
1272 { LPROC_LL_BRW_WRITE, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
1274 { LPROC_LL_IOCTL, LPROCFS_TYPE_REGS, "ioctl" },
1275 { LPROC_LL_OPEN, LPROCFS_TYPE_REGS, "open" },
1276 { LPROC_LL_RELEASE, LPROCFS_TYPE_REGS, "close" },
1277 { LPROC_LL_MAP, LPROCFS_TYPE_REGS, "mmap" },
1278 { LPROC_LL_FAULT, LPROCFS_TYPE_REGS, "page_fault" },
1279 { LPROC_LL_MKWRITE, LPROCFS_TYPE_REGS, "page_mkwrite" },
1280 { LPROC_LL_LLSEEK, LPROCFS_TYPE_REGS, "seek" },
1281 { LPROC_LL_FSYNC, LPROCFS_TYPE_REGS, "fsync" },
1282 { LPROC_LL_READDIR, LPROCFS_TYPE_REGS, "readdir" },
1283 /* inode operation */
1284 { LPROC_LL_SETATTR, LPROCFS_TYPE_REGS, "setattr" },
1285 { LPROC_LL_TRUNC, LPROCFS_TYPE_REGS, "truncate" },
1286 { LPROC_LL_FLOCK, LPROCFS_TYPE_REGS, "flock" },
1287 { LPROC_LL_GETATTR, LPROCFS_TYPE_REGS, "getattr" },
1288 /* dir inode operation */
1289 { LPROC_LL_CREATE, LPROCFS_TYPE_REGS, "create" },
1290 { LPROC_LL_LINK, LPROCFS_TYPE_REGS, "link" },
1291 { LPROC_LL_UNLINK, LPROCFS_TYPE_REGS, "unlink" },
1292 { LPROC_LL_SYMLINK, LPROCFS_TYPE_REGS, "symlink" },
1293 { LPROC_LL_MKDIR, LPROCFS_TYPE_REGS, "mkdir" },
1294 { LPROC_LL_RMDIR, LPROCFS_TYPE_REGS, "rmdir" },
1295 { LPROC_LL_MKNOD, LPROCFS_TYPE_REGS, "mknod" },
1296 { LPROC_LL_RENAME, LPROCFS_TYPE_REGS, "rename" },
1297 /* special inode operation */
1298 { LPROC_LL_STAFS, LPROCFS_TYPE_REGS, "statfs" },
1299 { LPROC_LL_ALLOC_INODE, LPROCFS_TYPE_REGS, "alloc_inode" },
1300 { LPROC_LL_SETXATTR, LPROCFS_TYPE_REGS, "setxattr" },
1301 { LPROC_LL_GETXATTR, LPROCFS_TYPE_REGS, "getxattr" },
1302 { LPROC_LL_GETXATTR_HITS, LPROCFS_TYPE_REGS, "getxattr_hits" },
1303 { LPROC_LL_LISTXATTR, LPROCFS_TYPE_REGS, "listxattr" },
1304 { LPROC_LL_REMOVEXATTR, LPROCFS_TYPE_REGS, "removexattr" },
1305 { LPROC_LL_INODE_PERM, LPROCFS_TYPE_REGS, "inode_permission" },
1308 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
1312 if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
1313 lprocfs_counter_add(sbi->ll_stats, op, count);
1314 else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
1315 sbi->ll_stats_track_id == current->pid)
1316 lprocfs_counter_add(sbi->ll_stats, op, count);
1317 else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
1318 sbi->ll_stats_track_id == current->parent->pid)
1319 lprocfs_counter_add(sbi->ll_stats, op, count);
1320 else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
1321 sbi->ll_stats_track_id ==
1322 from_kgid(&init_user_ns, current_gid()))
1323 lprocfs_counter_add(sbi->ll_stats, op, count);
1325 EXPORT_SYMBOL(ll_stats_ops_tally);
1327 static const char *ra_stat_string[] = {
1328 [RA_STAT_HIT] = "hits",
1329 [RA_STAT_MISS] = "misses",
1330 [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
1331 [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
1332 [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
1333 [RA_STAT_FAILED_MATCH] = "failed lock match",
1334 [RA_STAT_DISCARDED] = "read but discarded",
1335 [RA_STAT_ZERO_LEN] = "zero length file",
1336 [RA_STAT_ZERO_WINDOW] = "zero size window",
1337 [RA_STAT_EOF] = "read-ahead to EOF",
1338 [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
1339 [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
1340 [RA_STAT_FAILED_REACH_END] = "failed to reach end"
1343 LPROC_SEQ_FOPS_RO_TYPE(llite, name);
1344 LPROC_SEQ_FOPS_RO_TYPE(llite, uuid);
1346 int ll_debugfs_register_super(struct super_block *sb, const char *name)
1348 struct lustre_sb_info *lsi = s2lsi(sb);
1349 struct ll_sb_info *sbi = ll_s2sbi(sb);
1350 struct lprocfs_vars lvars[2];
1354 memset(lvars, 0, sizeof(lvars));
1355 lvars[0].name = name;
1357 LASSERT(sbi != NULL);
1359 sbi->ll_proc_root = lprocfs_register(name, proc_lustre_fs_root,
1361 if (IS_ERR(sbi->ll_proc_root)) {
1362 err = PTR_ERR(sbi->ll_proc_root);
1363 sbi->ll_proc_root = NULL;
1367 rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
1368 &vvp_dump_pgcache_file_ops, sbi);
1370 CWARN("Error adding the dump_page_cache file\n");
1372 rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
1373 &ll_rw_extents_stats_fops, sbi);
1375 CWARN("Error adding the extent_stats file\n");
1377 rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
1378 0644, &ll_rw_extents_stats_pp_fops, sbi);
1380 CWARN("Error adding the extents_stats_per_process file\n");
1382 rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
1383 &ll_rw_offset_stats_fops, sbi);
1385 CWARN("Error adding the offset_stats file\n");
1387 /* File operations stats */
1388 sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
1389 LPROCFS_STATS_FLAG_NONE);
1390 if (sbi->ll_stats == NULL)
1391 GOTO(out_proc, err = -ENOMEM);
1393 /* do counter init */
1394 for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
1395 __u32 type = llite_opcode_table[id].type;
1397 if (type & LPROCFS_TYPE_REGS)
1399 else if (type & LPROCFS_TYPE_BYTES)
1401 else if (type & LPROCFS_TYPE_PAGES)
1403 lprocfs_counter_init(sbi->ll_stats,
1404 llite_opcode_table[id].opcode,
1405 (type & LPROCFS_CNTR_AVGMINMAX),
1406 llite_opcode_table[id].opname, ptr);
1409 err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
1411 GOTO(out_stats, err);
1413 sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1414 LPROCFS_STATS_FLAG_NONE);
1415 if (sbi->ll_ra_stats == NULL)
1416 GOTO(out_stats, err = -ENOMEM);
1418 for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1419 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
1420 ra_stat_string[id], "pages");
1421 err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
1424 GOTO(out_ra_stats, err);
1426 err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
1428 GOTO(out_ra_stats, err);
1430 /* Yes we also register sysfs mount kset here as well */
1431 sbi->ll_kset.kobj.parent = llite_kobj;
1432 sbi->ll_kset.kobj.ktype = &llite_ktype;
1433 init_completion(&sbi->ll_kobj_unregister);
1434 err = kobject_set_name(&sbi->ll_kset.kobj, "%s", name);
1436 GOTO(out_ra_stats, err);
1438 err = kset_register(&sbi->ll_kset);
1440 GOTO(out_ra_stats, err);
1442 lsi->lsi_kobj = kobject_get(&sbi->ll_kset.kobj);
1446 lprocfs_free_stats(&sbi->ll_ra_stats);
1448 lprocfs_free_stats(&sbi->ll_stats);
1450 lprocfs_remove(&sbi->ll_proc_root);
1455 int lprocfs_ll_register_obd(struct super_block *sb, const char *obdname)
1457 struct lprocfs_vars lvars[2];
1458 struct ll_sb_info *sbi = ll_s2sbi(sb);
1459 struct obd_device *obd;
1460 struct proc_dir_entry *dir;
1461 char name[MAX_STRING_SIZE + 1];
1465 memset(lvars, 0, sizeof(lvars));
1467 name[MAX_STRING_SIZE] = '\0';
1468 lvars[0].name = name;
1470 LASSERT(sbi != NULL);
1471 LASSERT(obdname != NULL);
1473 obd = class_name2obd(obdname);
1475 LASSERT(obd != NULL);
1476 LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1477 LASSERT(obd->obd_type->typ_name != NULL);
1479 dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1481 GOTO(out, err = -ENOMEM);
1483 snprintf(name, MAX_STRING_SIZE, "common_name");
1484 lvars[0].fops = &llite_name_fops;
1485 err = lprocfs_add_vars(dir, lvars, obd);
1489 snprintf(name, MAX_STRING_SIZE, "uuid");
1490 lvars[0].fops = &llite_uuid_fops;
1491 err = lprocfs_add_vars(dir, lvars, obd);
1497 lprocfs_remove(&sbi->ll_proc_root);
1498 lprocfs_free_stats(&sbi->ll_ra_stats);
1499 lprocfs_free_stats(&sbi->ll_stats);
1504 void ll_debugfs_unregister_super(struct super_block *sb)
1506 struct lustre_sb_info *lsi = s2lsi(sb);
1507 struct ll_sb_info *sbi = ll_s2sbi(sb);
1509 kobject_put(lsi->lsi_kobj);
1511 kset_unregister(&sbi->ll_kset);
1512 wait_for_completion(&sbi->ll_kobj_unregister);
1514 if (sbi->ll_proc_root) {
1515 lprocfs_remove(&sbi->ll_proc_root);
1516 lprocfs_free_stats(&sbi->ll_ra_stats);
1517 lprocfs_free_stats(&sbi->ll_stats);
1520 #undef MAX_STRING_SIZE
1522 #define pct(a,b) (b ? a * 100 / b : 0)
1524 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1525 struct seq_file *seq, int which)
1527 unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1528 unsigned long start, end, r, w;
1529 char *unitp = "KMGTPEZY";
1531 struct per_process_info *pp_info = &io_extents->pp_extents[which];
1537 for(i = 0; i < LL_HIST_MAX; i++) {
1538 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1539 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1542 for(i = 0; i < LL_HIST_MAX; i++) {
1543 r = pp_info->pp_r_hist.oh_buckets[i];
1544 w = pp_info->pp_w_hist.oh_buckets[i];
1547 end = 1 << (i + LL_HIST_START - units);
1548 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu | "
1549 "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
1550 (i == LL_HIST_MAX - 1) ? '+' : ' ',
1551 r, pct(r, read_tot), pct(read_cum, read_tot),
1552 w, pct(w, write_tot), pct(write_cum, write_tot));
1554 if (start == 1<<10) {
1559 if (read_cum == read_tot && write_cum == write_tot)
1564 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1566 struct timespec64 now;
1567 struct ll_sb_info *sbi = seq->private;
1568 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1571 ktime_get_real_ts64(&now);
1573 if (!sbi->ll_rw_stats_on) {
1574 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
1577 seq_printf(seq, "snapshot_time: %llu.%09lu (secs.nsecs)\n",
1578 (s64)now.tv_sec, now.tv_nsec);
1579 seq_printf(seq, "%15s %19s | %20s\n", " ", "read", "write");
1580 seq_printf(seq, "%13s %14s %4s %4s | %14s %4s %4s\n",
1581 "extents", "calls", "%", "cum%",
1582 "calls", "%", "cum%");
1583 spin_lock(&sbi->ll_pp_extent_lock);
1584 for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1585 if (io_extents->pp_extents[k].pid != 0) {
1586 seq_printf(seq, "\nPID: %d\n",
1587 io_extents->pp_extents[k].pid);
1588 ll_display_extents_info(io_extents, seq, k);
1591 spin_unlock(&sbi->ll_pp_extent_lock);
1595 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1596 const char __user *buf,
1600 struct seq_file *seq = file->private_data;
1601 struct ll_sb_info *sbi = seq->private;
1602 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1609 value = ll_stats_pid_write(buf, len);
1612 sbi->ll_rw_stats_on = 0;
1614 sbi->ll_rw_stats_on = 1;
1616 spin_lock(&sbi->ll_pp_extent_lock);
1617 for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1618 io_extents->pp_extents[i].pid = 0;
1619 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1620 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1622 spin_unlock(&sbi->ll_pp_extent_lock);
1626 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1628 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1630 struct timespec64 now;
1631 struct ll_sb_info *sbi = seq->private;
1632 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1634 ktime_get_real_ts64(&now);
1636 if (!sbi->ll_rw_stats_on) {
1637 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
1640 seq_printf(seq, "snapshot_time: %llu.%09lu (secs.nsecs)\n",
1641 (s64)now.tv_sec, now.tv_nsec);
1643 seq_printf(seq, "%15s %19s | %20s\n", " ", "read", "write");
1644 seq_printf(seq, "%13s %14s %4s %4s | %14s %4s %4s\n",
1645 "extents", "calls", "%", "cum%",
1646 "calls", "%", "cum%");
1647 spin_lock(&sbi->ll_lock);
1648 ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1649 spin_unlock(&sbi->ll_lock);
1654 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
1655 const char __user *buf,
1656 size_t len, loff_t *off)
1658 struct seq_file *seq = file->private_data;
1659 struct ll_sb_info *sbi = seq->private;
1660 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1667 value = ll_stats_pid_write(buf, len);
1670 sbi->ll_rw_stats_on = 0;
1672 sbi->ll_rw_stats_on = 1;
1674 spin_lock(&sbi->ll_pp_extent_lock);
1675 for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1676 io_extents->pp_extents[i].pid = 0;
1677 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1678 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1680 spin_unlock(&sbi->ll_pp_extent_lock);
1684 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1686 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1687 struct ll_file_data *file, loff_t pos,
1688 size_t count, int rw)
1691 struct ll_rw_process_info *process;
1692 struct ll_rw_process_info *offset;
1693 int *off_count = &sbi->ll_rw_offset_entry_count;
1694 int *process_count = &sbi->ll_offset_process_count;
1695 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1697 if(!sbi->ll_rw_stats_on)
1699 process = sbi->ll_rw_process_info;
1700 offset = sbi->ll_rw_offset_info;
1702 spin_lock(&sbi->ll_pp_extent_lock);
1703 /* Extent statistics */
1704 for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1705 if(io_extents->pp_extents[i].pid == pid) {
1713 sbi->ll_extent_process_count =
1714 (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1715 cur = sbi->ll_extent_process_count;
1716 io_extents->pp_extents[cur].pid = pid;
1717 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1718 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1721 for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1722 (i < (LL_HIST_MAX - 1)); i++);
1724 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1725 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1727 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1728 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1730 spin_unlock(&sbi->ll_pp_extent_lock);
1732 spin_lock(&sbi->ll_process_lock);
1733 /* Offset statistics */
1734 for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1735 if (process[i].rw_pid == pid) {
1736 if (process[i].rw_last_file != file) {
1737 process[i].rw_range_start = pos;
1738 process[i].rw_last_file_pos = pos + count;
1739 process[i].rw_smallest_extent = count;
1740 process[i].rw_largest_extent = count;
1741 process[i].rw_offset = 0;
1742 process[i].rw_last_file = file;
1743 spin_unlock(&sbi->ll_process_lock);
1746 if (process[i].rw_last_file_pos != pos) {
1748 (*off_count + 1) % LL_OFFSET_HIST_MAX;
1749 offset[*off_count].rw_op = process[i].rw_op;
1750 offset[*off_count].rw_pid = pid;
1751 offset[*off_count].rw_range_start =
1752 process[i].rw_range_start;
1753 offset[*off_count].rw_range_end =
1754 process[i].rw_last_file_pos;
1755 offset[*off_count].rw_smallest_extent =
1756 process[i].rw_smallest_extent;
1757 offset[*off_count].rw_largest_extent =
1758 process[i].rw_largest_extent;
1759 offset[*off_count].rw_offset =
1760 process[i].rw_offset;
1761 process[i].rw_op = rw;
1762 process[i].rw_range_start = pos;
1763 process[i].rw_smallest_extent = count;
1764 process[i].rw_largest_extent = count;
1765 process[i].rw_offset = pos -
1766 process[i].rw_last_file_pos;
1768 if(process[i].rw_smallest_extent > count)
1769 process[i].rw_smallest_extent = count;
1770 if(process[i].rw_largest_extent < count)
1771 process[i].rw_largest_extent = count;
1772 process[i].rw_last_file_pos = pos + count;
1773 spin_unlock(&sbi->ll_process_lock);
1777 *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1778 process[*process_count].rw_pid = pid;
1779 process[*process_count].rw_op = rw;
1780 process[*process_count].rw_range_start = pos;
1781 process[*process_count].rw_last_file_pos = pos + count;
1782 process[*process_count].rw_smallest_extent = count;
1783 process[*process_count].rw_largest_extent = count;
1784 process[*process_count].rw_offset = 0;
1785 process[*process_count].rw_last_file = file;
1786 spin_unlock(&sbi->ll_process_lock);
1789 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1791 struct timespec64 now;
1792 struct ll_sb_info *sbi = seq->private;
1793 struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1794 struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1797 ktime_get_real_ts64(&now);
1799 if (!sbi->ll_rw_stats_on) {
1800 seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n");
1803 spin_lock(&sbi->ll_process_lock);
1805 seq_printf(seq, "snapshot_time: %llu.%09lu (secs.nsecs)\n",
1806 (s64)now.tv_sec, now.tv_nsec);
1807 seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1808 "R/W", "PID", "RANGE START", "RANGE END",
1809 "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1811 /* We stored the discontiguous offsets here; print them first */
1812 for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1813 if (offset[i].rw_pid != 0)
1815 "%3c %10d %14llu %14llu %17lu %17lu %14llu\n",
1816 offset[i].rw_op == READ ? 'R' : 'W',
1818 offset[i].rw_range_start,
1819 offset[i].rw_range_end,
1820 (unsigned long)offset[i].rw_smallest_extent,
1821 (unsigned long)offset[i].rw_largest_extent,
1822 offset[i].rw_offset);
1825 /* Then print the current offsets for each process */
1826 for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1827 if (process[i].rw_pid != 0)
1829 "%3c %10d %14llu %14llu %17lu %17lu %14llu\n",
1830 process[i].rw_op == READ ? 'R' : 'W',
1832 process[i].rw_range_start,
1833 process[i].rw_last_file_pos,
1834 (unsigned long)process[i].rw_smallest_extent,
1835 (unsigned long)process[i].rw_largest_extent,
1836 process[i].rw_offset);
1838 spin_unlock(&sbi->ll_process_lock);
1843 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
1844 const char __user *buf,
1845 size_t len, loff_t *off)
1847 struct seq_file *seq = file->private_data;
1848 struct ll_sb_info *sbi = seq->private;
1849 struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1850 struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1856 value = ll_stats_pid_write(buf, len);
1859 sbi->ll_rw_stats_on = 0;
1861 sbi->ll_rw_stats_on = 1;
1863 spin_lock(&sbi->ll_process_lock);
1864 sbi->ll_offset_process_count = 0;
1865 sbi->ll_rw_offset_entry_count = 0;
1866 memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1867 LL_PROCESS_HIST_MAX);
1868 memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1869 LL_OFFSET_HIST_MAX);
1870 spin_unlock(&sbi->ll_process_lock);
1876 * ll_stats_pid_write() - Determine if stats collection should be enabled
1877 * @buf: Buffer containing the data written
1878 * @len: Number of bytes in the buffer
1880 * Several proc files begin collecting stats when a value is written, and stop
1881 * collecting when either '0' or 'disable' is written. This function checks the
1882 * written value to see if collection should be enabled or disabled.
1884 * Return: If '0' or 'disable' is provided, 0 is returned. If the text
1885 * equivalent of a number is written, that number is returned. Otherwise,
1886 * 1 is returned. Non-zero return values indicate collection should be enabled.
1888 static __s64 ll_stats_pid_write(const char __user *buf, size_t len)
1890 unsigned long long value = 1;
1894 rc = kstrtoull_from_user(buf, len, 0, &value);
1895 if (rc < 0 && len < sizeof(kernbuf)) {
1897 if (copy_from_user(kernbuf, buf, len))
1901 if (kernbuf[len - 1] == '\n')
1902 kernbuf[len - 1] = 0;
1904 if (strncasecmp(kernbuf, "disable", 7) == 0)
1911 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1912 #endif /* CONFIG_PROC_FS */