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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 #define DEBUG_SUBSYSTEM S_LLITE
38 #include "../include/lustre_lite.h"
39 #include "../include/lprocfs_status.h"
40 #include <linux/seq_file.h>
41 #include "../include/obd_support.h"
43 #include "llite_internal.h"
44 #include "vvp_internal.h"
46 /* /proc/lustre/llite mount point registration */
47 static struct file_operations ll_rw_extents_stats_fops;
48 static struct file_operations ll_rw_extents_stats_pp_fops;
49 static struct file_operations ll_rw_offset_stats_fops;
51 static ssize_t blocksize_show(struct kobject *kobj, struct attribute *attr,
54 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
56 struct obd_statfs osfs;
59 rc = ll_statfs_internal(sbi->ll_sb, &osfs,
60 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
63 return sprintf(buf, "%u\n", osfs.os_bsize);
67 LUSTRE_RO_ATTR(blocksize);
69 static ssize_t kbytestotal_show(struct kobject *kobj, struct attribute *attr,
72 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
74 struct obd_statfs osfs;
77 rc = ll_statfs_internal(sbi->ll_sb, &osfs,
78 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
81 __u32 blk_size = osfs.os_bsize >> 10;
82 __u64 result = osfs.os_blocks;
84 while (blk_size >>= 1)
87 rc = sprintf(buf, "%llu\n", result);
92 LUSTRE_RO_ATTR(kbytestotal);
94 static ssize_t kbytesfree_show(struct kobject *kobj, struct attribute *attr,
97 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
99 struct obd_statfs osfs;
102 rc = ll_statfs_internal(sbi->ll_sb, &osfs,
103 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
106 __u32 blk_size = osfs.os_bsize >> 10;
107 __u64 result = osfs.os_bfree;
109 while (blk_size >>= 1)
112 rc = sprintf(buf, "%llu\n", result);
117 LUSTRE_RO_ATTR(kbytesfree);
119 static ssize_t kbytesavail_show(struct kobject *kobj, struct attribute *attr,
122 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
124 struct obd_statfs osfs;
127 rc = ll_statfs_internal(sbi->ll_sb, &osfs,
128 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
131 __u32 blk_size = osfs.os_bsize >> 10;
132 __u64 result = osfs.os_bavail;
134 while (blk_size >>= 1)
137 rc = sprintf(buf, "%llu\n", result);
142 LUSTRE_RO_ATTR(kbytesavail);
144 static ssize_t filestotal_show(struct kobject *kobj, struct attribute *attr,
147 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
149 struct obd_statfs osfs;
152 rc = ll_statfs_internal(sbi->ll_sb, &osfs,
153 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
156 return sprintf(buf, "%llu\n", osfs.os_files);
160 LUSTRE_RO_ATTR(filestotal);
162 static ssize_t filesfree_show(struct kobject *kobj, struct attribute *attr,
165 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
167 struct obd_statfs osfs;
170 rc = ll_statfs_internal(sbi->ll_sb, &osfs,
171 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
174 return sprintf(buf, "%llu\n", osfs.os_ffree);
178 LUSTRE_RO_ATTR(filesfree);
180 static ssize_t client_type_show(struct kobject *kobj, struct attribute *attr,
183 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
186 return sprintf(buf, "%s client\n",
187 sbi->ll_flags & LL_SBI_RMT_CLIENT ? "remote" : "local");
189 LUSTRE_RO_ATTR(client_type);
191 static ssize_t fstype_show(struct kobject *kobj, struct attribute *attr,
194 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
197 return sprintf(buf, "%s\n", sbi->ll_sb->s_type->name);
199 LUSTRE_RO_ATTR(fstype);
201 static ssize_t uuid_show(struct kobject *kobj, struct attribute *attr,
204 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
207 return sprintf(buf, "%s\n", sbi->ll_sb_uuid.uuid);
209 LUSTRE_RO_ATTR(uuid);
211 static int ll_site_stats_seq_show(struct seq_file *m, void *v)
213 struct super_block *sb = m->private;
216 * See description of statistical counters in struct cl_site, and
219 return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site), m);
222 LPROC_SEQ_FOPS_RO(ll_site_stats);
224 static ssize_t max_read_ahead_mb_show(struct kobject *kobj,
225 struct attribute *attr, char *buf)
227 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
232 spin_lock(&sbi->ll_lock);
233 pages_number = sbi->ll_ra_info.ra_max_pages;
234 spin_unlock(&sbi->ll_lock);
236 mult = 1 << (20 - PAGE_CACHE_SHIFT);
237 return lprocfs_read_frac_helper(buf, PAGE_SIZE, pages_number, mult);
240 static ssize_t max_read_ahead_mb_store(struct kobject *kobj,
241 struct attribute *attr,
245 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
248 unsigned long pages_number;
250 rc = kstrtoul(buffer, 10, &pages_number);
254 pages_number *= 1 << (20 - PAGE_CACHE_SHIFT); /* MB -> pages */
256 if (pages_number > totalram_pages / 2) {
258 CERROR("can't set file readahead more than %lu MB\n",
259 totalram_pages >> (20 - PAGE_CACHE_SHIFT + 1)); /*1/2 of RAM*/
263 spin_lock(&sbi->ll_lock);
264 sbi->ll_ra_info.ra_max_pages = pages_number;
265 spin_unlock(&sbi->ll_lock);
269 LUSTRE_RW_ATTR(max_read_ahead_mb);
271 static ssize_t max_read_ahead_per_file_mb_show(struct kobject *kobj,
272 struct attribute *attr,
275 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
280 spin_lock(&sbi->ll_lock);
281 pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
282 spin_unlock(&sbi->ll_lock);
284 mult = 1 << (20 - PAGE_CACHE_SHIFT);
285 return lprocfs_read_frac_helper(buf, PAGE_SIZE, pages_number, mult);
288 static ssize_t max_read_ahead_per_file_mb_store(struct kobject *kobj,
289 struct attribute *attr,
293 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
296 unsigned long pages_number;
298 rc = kstrtoul(buffer, 10, &pages_number);
302 if (pages_number > sbi->ll_ra_info.ra_max_pages) {
303 CERROR("can't set file readahead more than max_read_ahead_mb %lu MB\n",
304 sbi->ll_ra_info.ra_max_pages);
308 spin_lock(&sbi->ll_lock);
309 sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
310 spin_unlock(&sbi->ll_lock);
314 LUSTRE_RW_ATTR(max_read_ahead_per_file_mb);
316 static ssize_t max_read_ahead_whole_mb_show(struct kobject *kobj,
317 struct attribute *attr,
320 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
325 spin_lock(&sbi->ll_lock);
326 pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
327 spin_unlock(&sbi->ll_lock);
329 mult = 1 << (20 - PAGE_CACHE_SHIFT);
330 return lprocfs_read_frac_helper(buf, PAGE_SIZE, pages_number, mult);
333 static ssize_t max_read_ahead_whole_mb_store(struct kobject *kobj,
334 struct attribute *attr,
338 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
341 unsigned long pages_number;
343 rc = kstrtoul(buffer, 10, &pages_number);
347 /* Cap this at the current max readahead window size, the readahead
348 * algorithm does this anyway so it's pointless to set it larger. */
349 if (pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
350 CERROR("can't set max_read_ahead_whole_mb more than max_read_ahead_per_file_mb: %lu\n",
351 sbi->ll_ra_info.ra_max_pages_per_file >> (20 - PAGE_CACHE_SHIFT));
355 spin_lock(&sbi->ll_lock);
356 sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
357 spin_unlock(&sbi->ll_lock);
361 LUSTRE_RW_ATTR(max_read_ahead_whole_mb);
363 static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v)
365 struct super_block *sb = m->private;
366 struct ll_sb_info *sbi = ll_s2sbi(sb);
367 struct cl_client_cache *cache = &sbi->ll_cache;
368 int shift = 20 - PAGE_CACHE_SHIFT;
372 max_cached_mb = cache->ccc_lru_max >> shift;
373 unused_mb = atomic_read(&cache->ccc_lru_left) >> shift;
376 "max_cached_mb: %d\n"
379 "reclaim_count: %u\n",
380 atomic_read(&cache->ccc_users),
382 max_cached_mb - unused_mb,
384 cache->ccc_lru_shrinkers);
388 static ssize_t ll_max_cached_mb_seq_write(struct file *file,
389 const char __user *buffer,
390 size_t count, loff_t *off)
392 struct super_block *sb = ((struct seq_file *)file->private_data)->private;
393 struct ll_sb_info *sbi = ll_s2sbi(sb);
394 struct cl_client_cache *cache = &sbi->ll_cache;
395 int mult, rc, pages_number;
400 if (count >= sizeof(kernbuf))
403 if (copy_from_user(kernbuf, buffer, count))
407 mult = 1 << (20 - PAGE_CACHE_SHIFT);
408 buffer += lprocfs_find_named_value(kernbuf, "max_cached_mb:", &count) -
410 rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
414 if (pages_number < 0 || pages_number > totalram_pages) {
415 CERROR("%s: can't set max cache more than %lu MB\n",
416 ll_get_fsname(sb, NULL, 0),
417 totalram_pages >> (20 - PAGE_CACHE_SHIFT));
421 spin_lock(&sbi->ll_lock);
422 diff = pages_number - cache->ccc_lru_max;
423 spin_unlock(&sbi->ll_lock);
425 /* easy - add more LRU slots. */
427 atomic_add(diff, &cache->ccc_lru_left);
436 /* reduce LRU budget from free slots. */
440 ov = atomic_read(&cache->ccc_lru_left);
444 nv = ov > diff ? ov - diff : 0;
445 rc = atomic_cmpxchg(&cache->ccc_lru_left, ov, nv);
446 if (likely(ov == rc)) {
456 if (sbi->ll_dt_exp == NULL) { /* being initialized */
461 /* difficult - have to ask OSCs to drop LRU slots. */
463 rc = obd_set_info_async(NULL, sbi->ll_dt_exp,
464 sizeof(KEY_CACHE_LRU_SHRINK),
465 KEY_CACHE_LRU_SHRINK,
466 sizeof(tmp), &tmp, NULL);
473 spin_lock(&sbi->ll_lock);
474 cache->ccc_lru_max = pages_number;
475 spin_unlock(&sbi->ll_lock);
478 atomic_add(nrpages, &cache->ccc_lru_left);
483 LPROC_SEQ_FOPS(ll_max_cached_mb);
485 static ssize_t checksum_pages_show(struct kobject *kobj, struct attribute *attr,
488 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
491 return sprintf(buf, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
494 static ssize_t checksum_pages_store(struct kobject *kobj,
495 struct attribute *attr,
499 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
508 rc = kstrtoul(buffer, 10, &val);
512 sbi->ll_flags |= LL_SBI_CHECKSUM;
514 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
516 rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
517 KEY_CHECKSUM, sizeof(val), &val, NULL);
519 CWARN("Failed to set OSC checksum flags: %d\n", rc);
523 LUSTRE_RW_ATTR(checksum_pages);
525 static ssize_t ll_rd_track_id(struct kobject *kobj, char *buf,
526 enum stats_track_type type)
528 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
531 if (sbi->ll_stats_track_type == type)
532 return sprintf(buf, "%d\n", sbi->ll_stats_track_id);
533 else if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
534 return sprintf(buf, "0 (all)\n");
536 return sprintf(buf, "untracked\n");
539 static ssize_t ll_wr_track_id(struct kobject *kobj, const char *buffer,
541 enum stats_track_type type)
543 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
548 rc = kstrtoul(buffer, 10, &pid);
551 sbi->ll_stats_track_id = pid;
553 sbi->ll_stats_track_type = STATS_TRACK_ALL;
555 sbi->ll_stats_track_type = type;
556 lprocfs_clear_stats(sbi->ll_stats);
560 static ssize_t stats_track_pid_show(struct kobject *kobj,
561 struct attribute *attr,
564 return ll_rd_track_id(kobj, buf, STATS_TRACK_PID);
567 static ssize_t stats_track_pid_store(struct kobject *kobj,
568 struct attribute *attr,
572 return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PID);
574 LUSTRE_RW_ATTR(stats_track_pid);
576 static ssize_t stats_track_ppid_show(struct kobject *kobj,
577 struct attribute *attr,
580 return ll_rd_track_id(kobj, buf, STATS_TRACK_PPID);
583 static ssize_t stats_track_ppid_store(struct kobject *kobj,
584 struct attribute *attr,
588 return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_PPID);
590 LUSTRE_RW_ATTR(stats_track_ppid);
592 static ssize_t stats_track_gid_show(struct kobject *kobj,
593 struct attribute *attr,
596 return ll_rd_track_id(kobj, buf, STATS_TRACK_GID);
599 static ssize_t stats_track_gid_store(struct kobject *kobj,
600 struct attribute *attr,
604 return ll_wr_track_id(kobj, buffer, count, STATS_TRACK_GID);
606 LUSTRE_RW_ATTR(stats_track_gid);
608 static ssize_t statahead_max_show(struct kobject *kobj,
609 struct attribute *attr,
612 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
615 return sprintf(buf, "%u\n", sbi->ll_sa_max);
618 static ssize_t statahead_max_store(struct kobject *kobj,
619 struct attribute *attr,
623 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
628 rc = kstrtoul(buffer, 10, &val);
632 if (val <= LL_SA_RPC_MAX)
633 sbi->ll_sa_max = val;
635 CERROR("Bad statahead_max value %lu. Valid values are in the range [0, %d]\n",
640 LUSTRE_RW_ATTR(statahead_max);
642 static ssize_t statahead_agl_show(struct kobject *kobj,
643 struct attribute *attr,
646 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
649 return sprintf(buf, "%u\n", sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
652 static ssize_t statahead_agl_store(struct kobject *kobj,
653 struct attribute *attr,
657 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
662 rc = kstrtoul(buffer, 10, &val);
667 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
669 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
673 LUSTRE_RW_ATTR(statahead_agl);
675 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
677 struct super_block *sb = m->private;
678 struct ll_sb_info *sbi = ll_s2sbi(sb);
681 "statahead total: %u\n"
682 "statahead wrong: %u\n"
684 atomic_read(&sbi->ll_sa_total),
685 atomic_read(&sbi->ll_sa_wrong),
686 atomic_read(&sbi->ll_agl_total));
690 LPROC_SEQ_FOPS_RO(ll_statahead_stats);
692 static ssize_t lazystatfs_show(struct kobject *kobj,
693 struct attribute *attr,
696 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
699 return sprintf(buf, "%u\n", sbi->ll_flags & LL_SBI_LAZYSTATFS ? 1 : 0);
702 static ssize_t lazystatfs_store(struct kobject *kobj,
703 struct attribute *attr,
707 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
712 rc = kstrtoul(buffer, 10, &val);
717 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
719 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
723 LUSTRE_RW_ATTR(lazystatfs);
725 static ssize_t max_easize_show(struct kobject *kobj,
726 struct attribute *attr,
729 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
734 rc = ll_get_max_mdsize(sbi, &ealen);
738 return sprintf(buf, "%u\n", ealen);
740 LUSTRE_RO_ATTR(max_easize);
742 static ssize_t default_easize_show(struct kobject *kobj,
743 struct attribute *attr,
746 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
751 rc = ll_get_default_mdsize(sbi, &ealen);
755 return sprintf(buf, "%u\n", ealen);
757 LUSTRE_RO_ATTR(default_easize);
759 static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
761 const char *str[] = LL_SBI_FLAGS;
762 struct super_block *sb = m->private;
763 int flags = ll_s2sbi(sb)->ll_flags;
767 if (ARRAY_SIZE(str) <= i) {
768 CERROR("%s: Revise array LL_SBI_FLAGS to match sbi flags please.\n",
769 ll_get_fsname(sb, NULL, 0));
774 seq_printf(m, "%s ", str[i]);
778 seq_printf(m, "\b\n");
782 LPROC_SEQ_FOPS_RO(ll_sbi_flags);
784 static ssize_t xattr_cache_show(struct kobject *kobj,
785 struct attribute *attr,
788 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
791 return sprintf(buf, "%u\n", sbi->ll_xattr_cache_enabled);
794 static ssize_t xattr_cache_store(struct kobject *kobj,
795 struct attribute *attr,
799 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
804 rc = kstrtoul(buffer, 10, &val);
808 if (val != 0 && val != 1)
811 if (val == 1 && !(sbi->ll_flags & LL_SBI_XATTR_CACHE))
814 sbi->ll_xattr_cache_enabled = val;
818 LUSTRE_RW_ATTR(xattr_cache);
820 static struct lprocfs_vars lprocfs_llite_obd_vars[] = {
821 /* { "mntpt_path", ll_rd_path, 0, 0 }, */
822 { "site", &ll_site_stats_fops, NULL, 0 },
823 /* { "filegroups", lprocfs_rd_filegroups, 0, 0 }, */
824 { "max_cached_mb", &ll_max_cached_mb_fops, NULL },
825 { "statahead_stats", &ll_statahead_stats_fops, NULL, 0 },
826 { "sbi_flags", &ll_sbi_flags_fops, NULL, 0 },
830 #define MAX_STRING_SIZE 128
832 static struct attribute *llite_attrs[] = {
833 &lustre_attr_blocksize.attr,
834 &lustre_attr_kbytestotal.attr,
835 &lustre_attr_kbytesfree.attr,
836 &lustre_attr_kbytesavail.attr,
837 &lustre_attr_filestotal.attr,
838 &lustre_attr_filesfree.attr,
839 &lustre_attr_client_type.attr,
840 &lustre_attr_fstype.attr,
841 &lustre_attr_uuid.attr,
842 &lustre_attr_max_read_ahead_mb.attr,
843 &lustre_attr_max_read_ahead_per_file_mb.attr,
844 &lustre_attr_max_read_ahead_whole_mb.attr,
845 &lustre_attr_checksum_pages.attr,
846 &lustre_attr_stats_track_pid.attr,
847 &lustre_attr_stats_track_ppid.attr,
848 &lustre_attr_stats_track_gid.attr,
849 &lustre_attr_statahead_max.attr,
850 &lustre_attr_statahead_agl.attr,
851 &lustre_attr_lazystatfs.attr,
852 &lustre_attr_max_easize.attr,
853 &lustre_attr_default_easize.attr,
854 &lustre_attr_xattr_cache.attr,
858 static void llite_sb_release(struct kobject *kobj)
860 struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,
862 complete(&sbi->ll_kobj_unregister);
865 static struct kobj_type llite_ktype = {
866 .default_attrs = llite_attrs,
867 .sysfs_ops = &lustre_sysfs_ops,
868 .release = llite_sb_release,
871 static const struct llite_file_opcode {
875 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
877 { LPROC_LL_DIRTY_HITS, LPROCFS_TYPE_REGS, "dirty_pages_hits" },
878 { LPROC_LL_DIRTY_MISSES, LPROCFS_TYPE_REGS, "dirty_pages_misses" },
879 { LPROC_LL_READ_BYTES, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
881 { LPROC_LL_WRITE_BYTES, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
883 { LPROC_LL_BRW_READ, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
885 { LPROC_LL_BRW_WRITE, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
887 { LPROC_LL_OSC_READ, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
889 { LPROC_LL_OSC_WRITE, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
891 { LPROC_LL_IOCTL, LPROCFS_TYPE_REGS, "ioctl" },
892 { LPROC_LL_OPEN, LPROCFS_TYPE_REGS, "open" },
893 { LPROC_LL_RELEASE, LPROCFS_TYPE_REGS, "close" },
894 { LPROC_LL_MAP, LPROCFS_TYPE_REGS, "mmap" },
895 { LPROC_LL_LLSEEK, LPROCFS_TYPE_REGS, "seek" },
896 { LPROC_LL_FSYNC, LPROCFS_TYPE_REGS, "fsync" },
897 { LPROC_LL_READDIR, LPROCFS_TYPE_REGS, "readdir" },
898 /* inode operation */
899 { LPROC_LL_SETATTR, LPROCFS_TYPE_REGS, "setattr" },
900 { LPROC_LL_TRUNC, LPROCFS_TYPE_REGS, "truncate" },
901 { LPROC_LL_FLOCK, LPROCFS_TYPE_REGS, "flock" },
902 { LPROC_LL_GETATTR, LPROCFS_TYPE_REGS, "getattr" },
903 /* dir inode operation */
904 { LPROC_LL_CREATE, LPROCFS_TYPE_REGS, "create" },
905 { LPROC_LL_LINK, LPROCFS_TYPE_REGS, "link" },
906 { LPROC_LL_UNLINK, LPROCFS_TYPE_REGS, "unlink" },
907 { LPROC_LL_SYMLINK, LPROCFS_TYPE_REGS, "symlink" },
908 { LPROC_LL_MKDIR, LPROCFS_TYPE_REGS, "mkdir" },
909 { LPROC_LL_RMDIR, LPROCFS_TYPE_REGS, "rmdir" },
910 { LPROC_LL_MKNOD, LPROCFS_TYPE_REGS, "mknod" },
911 { LPROC_LL_RENAME, LPROCFS_TYPE_REGS, "rename" },
912 /* special inode operation */
913 { LPROC_LL_STAFS, LPROCFS_TYPE_REGS, "statfs" },
914 { LPROC_LL_ALLOC_INODE, LPROCFS_TYPE_REGS, "alloc_inode" },
915 { LPROC_LL_SETXATTR, LPROCFS_TYPE_REGS, "setxattr" },
916 { LPROC_LL_GETXATTR, LPROCFS_TYPE_REGS, "getxattr" },
917 { LPROC_LL_GETXATTR_HITS, LPROCFS_TYPE_REGS, "getxattr_hits" },
918 { LPROC_LL_LISTXATTR, LPROCFS_TYPE_REGS, "listxattr" },
919 { LPROC_LL_REMOVEXATTR, LPROCFS_TYPE_REGS, "removexattr" },
920 { LPROC_LL_INODE_PERM, LPROCFS_TYPE_REGS, "inode_permission" },
923 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
927 if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
928 lprocfs_counter_add(sbi->ll_stats, op, count);
929 else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
930 sbi->ll_stats_track_id == current->pid)
931 lprocfs_counter_add(sbi->ll_stats, op, count);
932 else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
933 sbi->ll_stats_track_id == current->real_parent->pid)
934 lprocfs_counter_add(sbi->ll_stats, op, count);
935 else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
936 sbi->ll_stats_track_id ==
937 from_kgid(&init_user_ns, current_gid()))
938 lprocfs_counter_add(sbi->ll_stats, op, count);
940 EXPORT_SYMBOL(ll_stats_ops_tally);
942 static const char *ra_stat_string[] = {
943 [RA_STAT_HIT] = "hits",
944 [RA_STAT_MISS] = "misses",
945 [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
946 [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
947 [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
948 [RA_STAT_FAILED_MATCH] = "failed lock match",
949 [RA_STAT_DISCARDED] = "read but discarded",
950 [RA_STAT_ZERO_LEN] = "zero length file",
951 [RA_STAT_ZERO_WINDOW] = "zero size window",
952 [RA_STAT_EOF] = "read-ahead to EOF",
953 [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
954 [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
957 int ldebugfs_register_mountpoint(struct dentry *parent,
958 struct super_block *sb, char *osc, char *mdc)
960 struct lustre_sb_info *lsi = s2lsi(sb);
961 struct ll_sb_info *sbi = ll_s2sbi(sb);
962 struct obd_device *obd;
964 char name[MAX_STRING_SIZE + 1], *ptr;
965 int err, id, len, rc;
967 name[MAX_STRING_SIZE] = '\0';
969 LASSERT(sbi != NULL);
970 LASSERT(mdc != NULL);
971 LASSERT(osc != NULL);
974 len = strlen(lsi->lsi_lmd->lmd_profile);
975 ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
976 if (ptr && (strcmp(ptr, "-client") == 0))
980 snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
981 lsi->lsi_lmd->lmd_profile, sb);
983 dir = ldebugfs_register(name, parent, NULL, NULL);
984 if (IS_ERR_OR_NULL(dir)) {
985 err = dir ? PTR_ERR(dir) : -ENOMEM;
986 sbi->ll_debugfs_entry = NULL;
989 sbi->ll_debugfs_entry = dir;
991 rc = ldebugfs_seq_create(sbi->ll_debugfs_entry, "dump_page_cache", 0444,
992 &vvp_dump_pgcache_file_ops, sbi);
994 CWARN("Error adding the dump_page_cache file\n");
996 rc = ldebugfs_seq_create(sbi->ll_debugfs_entry, "extents_stats", 0644,
997 &ll_rw_extents_stats_fops, sbi);
999 CWARN("Error adding the extent_stats file\n");
1001 rc = ldebugfs_seq_create(sbi->ll_debugfs_entry,
1002 "extents_stats_per_process",
1003 0644, &ll_rw_extents_stats_pp_fops, sbi);
1005 CWARN("Error adding the extents_stats_per_process file\n");
1007 rc = ldebugfs_seq_create(sbi->ll_debugfs_entry, "offset_stats", 0644,
1008 &ll_rw_offset_stats_fops, sbi);
1010 CWARN("Error adding the offset_stats file\n");
1012 /* File operations stats */
1013 sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
1014 LPROCFS_STATS_FLAG_NONE);
1015 if (sbi->ll_stats == NULL) {
1019 /* do counter init */
1020 for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
1021 __u32 type = llite_opcode_table[id].type;
1024 if (type & LPROCFS_TYPE_REGS)
1026 else if (type & LPROCFS_TYPE_BYTES)
1028 else if (type & LPROCFS_TYPE_PAGES)
1030 lprocfs_counter_init(sbi->ll_stats,
1031 llite_opcode_table[id].opcode,
1032 (type & LPROCFS_CNTR_AVGMINMAX),
1033 llite_opcode_table[id].opname, ptr);
1035 err = ldebugfs_register_stats(sbi->ll_debugfs_entry, "stats",
1040 sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1041 LPROCFS_STATS_FLAG_NONE);
1042 if (sbi->ll_ra_stats == NULL) {
1047 for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1048 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
1049 ra_stat_string[id], "pages");
1051 err = ldebugfs_register_stats(sbi->ll_debugfs_entry, "read_ahead_stats",
1056 err = ldebugfs_add_vars(sbi->ll_debugfs_entry,
1057 lprocfs_llite_obd_vars, sb);
1061 sbi->ll_kobj.kset = llite_kset;
1062 init_completion(&sbi->ll_kobj_unregister);
1063 err = kobject_init_and_add(&sbi->ll_kobj, &llite_ktype, NULL,
1069 obd = class_name2obd(mdc);
1071 err = sysfs_create_link(&sbi->ll_kobj, &obd->obd_kobj,
1072 obd->obd_type->typ_name);
1077 obd = class_name2obd(osc);
1079 err = sysfs_create_link(&sbi->ll_kobj, &obd->obd_kobj,
1080 obd->obd_type->typ_name);
1083 ldebugfs_remove(&sbi->ll_debugfs_entry);
1084 lprocfs_free_stats(&sbi->ll_ra_stats);
1085 lprocfs_free_stats(&sbi->ll_stats);
1090 void ldebugfs_unregister_mountpoint(struct ll_sb_info *sbi)
1092 if (sbi->ll_debugfs_entry) {
1093 ldebugfs_remove(&sbi->ll_debugfs_entry);
1094 kobject_put(&sbi->ll_kobj);
1095 wait_for_completion(&sbi->ll_kobj_unregister);
1096 lprocfs_free_stats(&sbi->ll_ra_stats);
1097 lprocfs_free_stats(&sbi->ll_stats);
1101 #undef MAX_STRING_SIZE
1103 #define pct(a, b) (b ? a * 100 / b : 0)
1105 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1106 struct seq_file *seq, int which)
1108 unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1109 unsigned long start, end, r, w;
1110 char *unitp = "KMGTPEZY";
1112 struct per_process_info *pp_info = &io_extents->pp_extents[which];
1118 for (i = 0; i < LL_HIST_MAX; i++) {
1119 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1120 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1123 for (i = 0; i < LL_HIST_MAX; i++) {
1124 r = pp_info->pp_r_hist.oh_buckets[i];
1125 w = pp_info->pp_w_hist.oh_buckets[i];
1128 end = 1 << (i + LL_HIST_START - units);
1129 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu | %14lu %4lu %4lu\n",
1130 start, *unitp, end, *unitp,
1131 (i == LL_HIST_MAX - 1) ? '+' : ' ',
1132 r, pct(r, read_tot), pct(read_cum, read_tot),
1133 w, pct(w, write_tot), pct(write_cum, write_tot));
1135 if (start == 1<<10) {
1140 if (read_cum == read_tot && write_cum == write_tot)
1145 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1147 struct timespec64 now;
1148 struct ll_sb_info *sbi = seq->private;
1149 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1152 ktime_get_real_ts64(&now);
1154 if (!sbi->ll_rw_stats_on) {
1155 seq_printf(seq, "disabled\n"
1156 "write anything in this file to activate, then 0 or \"[D/d]isabled\" to deactivate\n");
1159 seq_printf(seq, "snapshot_time: %llu.%09lu (secs.usecs)\n",
1160 (s64)now.tv_sec, (unsigned long)now.tv_nsec);
1161 seq_printf(seq, "%15s %19s | %20s\n", " ", "read", "write");
1162 seq_printf(seq, "%13s %14s %4s %4s | %14s %4s %4s\n",
1163 "extents", "calls", "%", "cum%",
1164 "calls", "%", "cum%");
1165 spin_lock(&sbi->ll_pp_extent_lock);
1166 for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1167 if (io_extents->pp_extents[k].pid != 0) {
1168 seq_printf(seq, "\nPID: %d\n",
1169 io_extents->pp_extents[k].pid);
1170 ll_display_extents_info(io_extents, seq, k);
1173 spin_unlock(&sbi->ll_pp_extent_lock);
1177 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1178 const char __user *buf,
1182 struct seq_file *seq = file->private_data;
1183 struct ll_sb_info *sbi = seq->private;
1184 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1186 int value = 1, rc = 0;
1191 rc = lprocfs_write_helper(buf, len, &value);
1192 if (rc < 0 && len < 16) {
1195 if (copy_from_user(kernbuf, buf, len))
1199 if (kernbuf[len - 1] == '\n')
1200 kernbuf[len - 1] = 0;
1202 if (strcmp(kernbuf, "disabled") == 0 ||
1203 strcmp(kernbuf, "Disabled") == 0)
1208 sbi->ll_rw_stats_on = 0;
1210 sbi->ll_rw_stats_on = 1;
1212 spin_lock(&sbi->ll_pp_extent_lock);
1213 for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1214 io_extents->pp_extents[i].pid = 0;
1215 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1216 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1218 spin_unlock(&sbi->ll_pp_extent_lock);
1222 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1224 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1226 struct timespec64 now;
1227 struct ll_sb_info *sbi = seq->private;
1228 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1230 ktime_get_real_ts64(&now);
1232 if (!sbi->ll_rw_stats_on) {
1233 seq_printf(seq, "disabled\n"
1234 "write anything in this file to activate, then 0 or \"[D/d]isabled\" to deactivate\n");
1237 seq_printf(seq, "snapshot_time: %llu.%09lu (secs.usecs)\n",
1238 (u64)now.tv_sec, (unsigned long)now.tv_nsec);
1240 seq_printf(seq, "%15s %19s | %20s\n", " ", "read", "write");
1241 seq_printf(seq, "%13s %14s %4s %4s | %14s %4s %4s\n",
1242 "extents", "calls", "%", "cum%",
1243 "calls", "%", "cum%");
1244 spin_lock(&sbi->ll_lock);
1245 ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1246 spin_unlock(&sbi->ll_lock);
1251 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
1252 const char __user *buf,
1253 size_t len, loff_t *off)
1255 struct seq_file *seq = file->private_data;
1256 struct ll_sb_info *sbi = seq->private;
1257 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1259 int value = 1, rc = 0;
1264 rc = lprocfs_write_helper(buf, len, &value);
1265 if (rc < 0 && len < 16) {
1268 if (copy_from_user(kernbuf, buf, len))
1272 if (kernbuf[len - 1] == '\n')
1273 kernbuf[len - 1] = 0;
1275 if (strcmp(kernbuf, "disabled") == 0 ||
1276 strcmp(kernbuf, "Disabled") == 0)
1281 sbi->ll_rw_stats_on = 0;
1283 sbi->ll_rw_stats_on = 1;
1285 spin_lock(&sbi->ll_pp_extent_lock);
1286 for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1287 io_extents->pp_extents[i].pid = 0;
1288 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1289 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1291 spin_unlock(&sbi->ll_pp_extent_lock);
1296 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1298 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1299 struct ll_file_data *file, loff_t pos,
1300 size_t count, int rw)
1303 struct ll_rw_process_info *process;
1304 struct ll_rw_process_info *offset;
1305 int *off_count = &sbi->ll_rw_offset_entry_count;
1306 int *process_count = &sbi->ll_offset_process_count;
1307 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1309 if (!sbi->ll_rw_stats_on)
1311 process = sbi->ll_rw_process_info;
1312 offset = sbi->ll_rw_offset_info;
1314 spin_lock(&sbi->ll_pp_extent_lock);
1315 /* Extent statistics */
1316 for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1317 if (io_extents->pp_extents[i].pid == pid) {
1325 sbi->ll_extent_process_count =
1326 (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1327 cur = sbi->ll_extent_process_count;
1328 io_extents->pp_extents[cur].pid = pid;
1329 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1330 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1333 for (i = 0; (count >= (1 << LL_HIST_START << i)) &&
1334 (i < (LL_HIST_MAX - 1)); i++)
1337 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1338 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1340 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1341 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1343 spin_unlock(&sbi->ll_pp_extent_lock);
1345 spin_lock(&sbi->ll_process_lock);
1346 /* Offset statistics */
1347 for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1348 if (process[i].rw_pid == pid) {
1349 if (process[i].rw_last_file != file) {
1350 process[i].rw_range_start = pos;
1351 process[i].rw_last_file_pos = pos + count;
1352 process[i].rw_smallest_extent = count;
1353 process[i].rw_largest_extent = count;
1354 process[i].rw_offset = 0;
1355 process[i].rw_last_file = file;
1356 spin_unlock(&sbi->ll_process_lock);
1359 if (process[i].rw_last_file_pos != pos) {
1361 (*off_count + 1) % LL_OFFSET_HIST_MAX;
1362 offset[*off_count].rw_op = process[i].rw_op;
1363 offset[*off_count].rw_pid = pid;
1364 offset[*off_count].rw_range_start =
1365 process[i].rw_range_start;
1366 offset[*off_count].rw_range_end =
1367 process[i].rw_last_file_pos;
1368 offset[*off_count].rw_smallest_extent =
1369 process[i].rw_smallest_extent;
1370 offset[*off_count].rw_largest_extent =
1371 process[i].rw_largest_extent;
1372 offset[*off_count].rw_offset =
1373 process[i].rw_offset;
1374 process[i].rw_op = rw;
1375 process[i].rw_range_start = pos;
1376 process[i].rw_smallest_extent = count;
1377 process[i].rw_largest_extent = count;
1378 process[i].rw_offset = pos -
1379 process[i].rw_last_file_pos;
1381 if (process[i].rw_smallest_extent > count)
1382 process[i].rw_smallest_extent = count;
1383 if (process[i].rw_largest_extent < count)
1384 process[i].rw_largest_extent = count;
1385 process[i].rw_last_file_pos = pos + count;
1386 spin_unlock(&sbi->ll_process_lock);
1390 *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1391 process[*process_count].rw_pid = pid;
1392 process[*process_count].rw_op = rw;
1393 process[*process_count].rw_range_start = pos;
1394 process[*process_count].rw_last_file_pos = pos + count;
1395 process[*process_count].rw_smallest_extent = count;
1396 process[*process_count].rw_largest_extent = count;
1397 process[*process_count].rw_offset = 0;
1398 process[*process_count].rw_last_file = file;
1399 spin_unlock(&sbi->ll_process_lock);
1402 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1404 struct timespec64 now;
1405 struct ll_sb_info *sbi = seq->private;
1406 struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1407 struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1410 ktime_get_real_ts64(&now);
1412 if (!sbi->ll_rw_stats_on) {
1413 seq_printf(seq, "disabled\n"
1414 "write anything in this file to activate, then 0 or \"[D/d]isabled\" to deactivate\n");
1417 spin_lock(&sbi->ll_process_lock);
1419 seq_printf(seq, "snapshot_time: %llu.%09lu (secs.usecs)\n",
1420 (s64)now.tv_sec, (unsigned long)now.tv_nsec);
1421 seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1422 "R/W", "PID", "RANGE START", "RANGE END",
1423 "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1424 /* We stored the discontiguous offsets here; print them first */
1425 for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1426 if (offset[i].rw_pid != 0)
1428 "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1429 offset[i].rw_op == READ ? 'R' : 'W',
1431 offset[i].rw_range_start,
1432 offset[i].rw_range_end,
1433 (unsigned long)offset[i].rw_smallest_extent,
1434 (unsigned long)offset[i].rw_largest_extent,
1435 offset[i].rw_offset);
1437 /* Then print the current offsets for each process */
1438 for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1439 if (process[i].rw_pid != 0)
1441 "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1442 process[i].rw_op == READ ? 'R' : 'W',
1444 process[i].rw_range_start,
1445 process[i].rw_last_file_pos,
1446 (unsigned long)process[i].rw_smallest_extent,
1447 (unsigned long)process[i].rw_largest_extent,
1448 process[i].rw_offset);
1450 spin_unlock(&sbi->ll_process_lock);
1455 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
1456 const char __user *buf,
1457 size_t len, loff_t *off)
1459 struct seq_file *seq = file->private_data;
1460 struct ll_sb_info *sbi = seq->private;
1461 struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1462 struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1463 int value = 1, rc = 0;
1468 rc = lprocfs_write_helper(buf, len, &value);
1470 if (rc < 0 && len < 16) {
1473 if (copy_from_user(kernbuf, buf, len))
1477 if (kernbuf[len - 1] == '\n')
1478 kernbuf[len - 1] = 0;
1480 if (strcmp(kernbuf, "disabled") == 0 ||
1481 strcmp(kernbuf, "Disabled") == 0)
1486 sbi->ll_rw_stats_on = 0;
1488 sbi->ll_rw_stats_on = 1;
1490 spin_lock(&sbi->ll_process_lock);
1491 sbi->ll_offset_process_count = 0;
1492 sbi->ll_rw_offset_entry_count = 0;
1493 memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1494 LL_PROCESS_HIST_MAX);
1495 memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1496 LL_OFFSET_HIST_MAX);
1497 spin_unlock(&sbi->ll_process_lock);
1502 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1504 void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
1506 lvars->obd_vars = lprocfs_llite_obd_vars;