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) 2012, 2013, 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 <linux/version.h>
39 #include <lustre_lite.h>
40 #include <lustre_param.h>
41 #include <lprocfs_status.h>
42 #include <obd_support.h>
44 #include "llite_internal.h"
46 struct proc_dir_entry *proc_lustre_fs_root;
49 /* /proc/lustre/llite mount point registration */
50 extern struct file_operations vvp_dump_pgcache_file_ops;
51 struct file_operations ll_rw_extents_stats_fops;
52 struct file_operations ll_rw_extents_stats_pp_fops;
53 struct file_operations ll_rw_offset_stats_fops;
55 static int ll_blksize_seq_show(struct seq_file *m, void *v)
57 struct super_block *sb = m->private;
58 struct obd_statfs osfs;
62 rc = ll_statfs_internal(sb, &osfs,
63 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
66 rc = seq_printf(m, "%u\n", osfs.os_bsize);
69 LPROC_SEQ_FOPS_RO(ll_blksize);
71 static int ll_kbytestotal_seq_show(struct seq_file *m, void *v)
73 struct super_block *sb = m->private;
74 struct obd_statfs osfs;
78 rc = ll_statfs_internal(sb, &osfs,
79 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
82 __u32 blk_size = osfs.os_bsize >> 10;
83 __u64 result = osfs.os_blocks;
85 while (blk_size >>= 1)
88 rc = seq_printf(m, LPU64"\n", result);
92 LPROC_SEQ_FOPS_RO(ll_kbytestotal);
94 static int ll_kbytesfree_seq_show(struct seq_file *m, void *v)
96 struct super_block *sb = m->private;
97 struct obd_statfs osfs;
101 rc = ll_statfs_internal(sb, &osfs,
102 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
105 __u32 blk_size = osfs.os_bsize >> 10;
106 __u64 result = osfs.os_bfree;
108 while (blk_size >>= 1)
111 rc = seq_printf(m, LPU64"\n", result);
115 LPROC_SEQ_FOPS_RO(ll_kbytesfree);
117 static int ll_kbytesavail_seq_show(struct seq_file *m, void *v)
119 struct super_block *sb = m->private;
120 struct obd_statfs osfs;
124 rc = ll_statfs_internal(sb, &osfs,
125 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
128 __u32 blk_size = osfs.os_bsize >> 10;
129 __u64 result = osfs.os_bavail;
131 while (blk_size >>= 1)
134 rc = seq_printf(m, LPU64"\n", result);
138 LPROC_SEQ_FOPS_RO(ll_kbytesavail);
140 static int ll_filestotal_seq_show(struct seq_file *m, void *v)
142 struct super_block *sb = m->private;
143 struct obd_statfs osfs;
147 rc = ll_statfs_internal(sb, &osfs,
148 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
151 rc = seq_printf(m, LPU64"\n", osfs.os_files);
154 LPROC_SEQ_FOPS_RO(ll_filestotal);
156 static int ll_filesfree_seq_show(struct seq_file *m, void *v)
158 struct super_block *sb = m->private;
159 struct obd_statfs osfs;
163 rc = ll_statfs_internal(sb, &osfs,
164 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
167 rc = seq_printf(m, LPU64"\n", osfs.os_ffree);
170 LPROC_SEQ_FOPS_RO(ll_filesfree);
172 static int ll_client_type_seq_show(struct seq_file *m, void *v)
174 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
177 LASSERT(sbi != NULL);
179 if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
180 rc = seq_printf(m, "remote client\n");
182 rc = seq_printf(m, "local client\n");
185 LPROC_SEQ_FOPS_RO(ll_client_type);
187 static int ll_fstype_seq_show(struct seq_file *m, void *v)
189 struct super_block *sb = m->private;
192 return seq_printf(m, "%s\n", sb->s_type->name);
194 LPROC_SEQ_FOPS_RO(ll_fstype);
196 static int ll_sb_uuid_seq_show(struct seq_file *m, void *v)
198 struct super_block *sb = m->private;
201 return seq_printf(m, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
203 LPROC_SEQ_FOPS_RO(ll_sb_uuid);
205 static int ll_xattr_cache_seq_show(struct seq_file *m, void *v)
207 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
209 return seq_printf(m, "%u\n", sbi->ll_xattr_cache_enabled);
212 static ssize_t ll_xattr_cache_seq_write(struct file *file, const char *buffer,
213 size_t count, loff_t *off)
215 struct seq_file *m = file->private_data;
216 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
219 rc = lprocfs_write_helper(buffer, count, &val);
223 if (val != 0 && val != 1)
226 if (val == 1 && !(sbi->ll_flags & LL_SBI_XATTR_CACHE))
229 sbi->ll_xattr_cache_enabled = val;
233 LPROC_SEQ_FOPS(ll_xattr_cache);
235 static int ll_site_stats_seq_show(struct seq_file *m, void *v)
237 struct super_block *sb = m->private;
240 * See description of statistical counters in struct cl_site, and
243 return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site), m);
245 LPROC_SEQ_FOPS_RO(ll_site_stats);
247 static int ll_max_readahead_mb_seq_show(struct seq_file *m, void *v)
249 struct super_block *sb = m->private;
250 struct ll_sb_info *sbi = ll_s2sbi(sb);
254 spin_lock(&sbi->ll_lock);
255 pages_number = sbi->ll_ra_info.ra_max_pages;
256 spin_unlock(&sbi->ll_lock);
258 mult = 1 << (20 - PAGE_CACHE_SHIFT);
259 return lprocfs_seq_read_frac_helper(m, pages_number, mult);
263 ll_max_readahead_mb_seq_write(struct file *file, const char *buffer,
264 size_t count, loff_t *off)
266 struct seq_file *m = file->private_data;
267 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
268 int mult, rc, pages_number;
270 mult = 1 << (20 - PAGE_CACHE_SHIFT);
271 rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
275 if (pages_number < 0 || pages_number > totalram_pages / 2) {
277 CERROR("can't set file readahead more than %lu MB\n",
278 totalram_pages >> (20 - PAGE_CACHE_SHIFT + 1));
282 spin_lock(&sbi->ll_lock);
283 sbi->ll_ra_info.ra_max_pages = pages_number;
284 spin_unlock(&sbi->ll_lock);
287 LPROC_SEQ_FOPS(ll_max_readahead_mb);
289 static int ll_max_readahead_per_file_mb_seq_show(struct seq_file *m, void *v)
291 struct super_block *sb = m->private;
292 struct ll_sb_info *sbi = ll_s2sbi(sb);
296 spin_lock(&sbi->ll_lock);
297 pages_number = sbi->ll_ra_info.ra_max_pages_per_file;
298 spin_unlock(&sbi->ll_lock);
300 mult = 1 << (20 - PAGE_CACHE_SHIFT);
301 return lprocfs_seq_read_frac_helper(m, pages_number, mult);
305 ll_max_readahead_per_file_mb_seq_write(struct file *file, const char *buffer,
306 size_t count, loff_t *off)
308 struct seq_file *m = file->private_data;
309 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
310 int mult, rc, pages_number;
312 mult = 1 << (20 - PAGE_CACHE_SHIFT);
313 rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
317 if (pages_number < 0 ||
318 pages_number > sbi->ll_ra_info.ra_max_pages) {
319 CERROR("can't set file readahead more than"
320 "max_read_ahead_mb %lu MB\n",
321 sbi->ll_ra_info.ra_max_pages);
325 spin_lock(&sbi->ll_lock);
326 sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
327 spin_unlock(&sbi->ll_lock);
330 LPROC_SEQ_FOPS(ll_max_readahead_per_file_mb);
332 static int ll_max_read_ahead_whole_mb_seq_show(struct seq_file *m, void *v)
334 struct super_block *sb = m->private;
335 struct ll_sb_info *sbi = ll_s2sbi(sb);
339 spin_lock(&sbi->ll_lock);
340 pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
341 spin_unlock(&sbi->ll_lock);
343 mult = 1 << (20 - PAGE_CACHE_SHIFT);
344 return lprocfs_seq_read_frac_helper(m, pages_number, mult);
348 ll_max_read_ahead_whole_mb_seq_write(struct file *file, const char *buffer,
349 size_t count, loff_t *off)
351 struct seq_file *m = file->private_data;
352 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
353 int mult, rc, pages_number;
355 mult = 1 << (20 - PAGE_CACHE_SHIFT);
356 rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
360 /* Cap this at the current max readahead window size, the readahead
361 * algorithm does this anyway so it's pointless to set it larger. */
362 if (pages_number < 0 ||
363 pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
364 CERROR("can't set max_read_ahead_whole_mb more than "
365 "max_read_ahead_per_file_mb: %lu\n",
366 sbi->ll_ra_info.ra_max_pages_per_file >>
367 (20 - PAGE_CACHE_SHIFT));
371 spin_lock(&sbi->ll_lock);
372 sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
373 spin_unlock(&sbi->ll_lock);
376 LPROC_SEQ_FOPS(ll_max_read_ahead_whole_mb);
378 static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v)
380 struct super_block *sb = m->private;
381 struct ll_sb_info *sbi = ll_s2sbi(sb);
382 struct cl_client_cache *cache = &sbi->ll_cache;
383 int shift = 20 - PAGE_CACHE_SHIFT;
387 max_cached_mb = cache->ccc_lru_max >> shift;
388 unused_mb = cfs_atomic_read(&cache->ccc_lru_left) >> shift;
391 "max_cached_mb: %d\n"
394 "reclaim_count: %u\n",
395 cfs_atomic_read(&cache->ccc_users),
397 max_cached_mb - unused_mb,
399 cache->ccc_lru_shrinkers);
403 ll_max_cached_mb_seq_write(struct file *file, const char *buffer,
404 size_t count, loff_t *off)
406 struct seq_file *m = file->private_data;
407 struct super_block *sb = m->private;
408 struct ll_sb_info *sbi = ll_s2sbi(sb);
409 struct cl_client_cache *cache = &sbi->ll_cache;
412 int mult, rc, pages_number;
417 mult = 1 << (20 - PAGE_CACHE_SHIFT);
418 buffer = lprocfs_find_named_value(buffer, "max_cached_mb:", &count);
419 rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);
423 if (pages_number < 0 || pages_number > totalram_pages) {
424 CERROR("%s: can't set max cache more than %lu MB\n",
425 ll_get_fsname(sb, NULL, 0),
426 totalram_pages >> (20 - PAGE_CACHE_SHIFT));
430 if (sbi->ll_dt_exp == NULL) /* being initialized */
433 spin_lock(&sbi->ll_lock);
434 diff = pages_number - cache->ccc_lru_max;
435 spin_unlock(&sbi->ll_lock);
437 /* easy - add more LRU slots. */
439 cfs_atomic_add(diff, &cache->ccc_lru_left);
443 env = cl_env_get(&refcheck);
451 /* reduce LRU budget from free slots. */
455 ov = cfs_atomic_read(&cache->ccc_lru_left);
459 nv = ov > diff ? ov - diff : 0;
460 rc = cfs_atomic_cmpxchg(&cache->ccc_lru_left, ov, nv);
461 if (likely(ov == rc)) {
471 /* difficult - have to ask OSCs to drop LRU slots. */
473 rc = obd_set_info_async(env, sbi->ll_dt_exp,
474 sizeof(KEY_CACHE_LRU_SHRINK),
475 KEY_CACHE_LRU_SHRINK,
476 sizeof(tmp), &tmp, NULL);
480 cl_env_put(env, &refcheck);
484 spin_lock(&sbi->ll_lock);
485 cache->ccc_lru_max = pages_number;
486 spin_unlock(&sbi->ll_lock);
489 cfs_atomic_add(nrpages, &cache->ccc_lru_left);
493 LPROC_SEQ_FOPS(ll_max_cached_mb);
495 static int ll_checksum_seq_show(struct seq_file *m, void *v)
497 struct super_block *sb = m->private;
498 struct ll_sb_info *sbi = ll_s2sbi(sb);
500 return seq_printf(m, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
503 static ssize_t ll_checksum_seq_write(struct file *file, const char *buffer,
504 size_t count, loff_t *off)
506 struct seq_file *m = file->private_data;
507 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
514 rc = lprocfs_write_helper(buffer, count, &val);
518 sbi->ll_flags |= LL_SBI_CHECKSUM;
520 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
522 rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
523 KEY_CHECKSUM, sizeof(val), &val, NULL);
525 CWARN("Failed to set OSC checksum flags: %d\n", rc);
529 LPROC_SEQ_FOPS(ll_checksum);
531 static int ll_max_rw_chunk_seq_show(struct seq_file *m, void *v)
533 struct super_block *sb = m->private;
535 return seq_printf(m, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk);
538 static ssize_t ll_max_rw_chunk_seq_write(struct file *file, const char *buffer,
539 size_t count, loff_t *off)
541 struct seq_file *m = file->private_data;
542 struct super_block *sb = m->private;
545 rc = lprocfs_write_helper(buffer, count, &val);
548 ll_s2sbi(sb)->ll_max_rw_chunk = val;
551 LPROC_SEQ_FOPS(ll_max_rw_chunk);
553 static int ll_rd_track_id(struct seq_file *m, enum stats_track_type type)
555 struct super_block *sb = m->private;
557 if (ll_s2sbi(sb)->ll_stats_track_type == type) {
558 return seq_printf(m, "%d\n",
559 ll_s2sbi(sb)->ll_stats_track_id);
560 } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
561 return seq_printf(m, "0 (all)\n");
563 return seq_printf(m, "untracked\n");
567 static int ll_wr_track_id(const char *buffer, unsigned long count, void *data,
568 enum stats_track_type type)
570 struct super_block *sb = data;
573 rc = lprocfs_write_helper(buffer, count, &pid);
576 ll_s2sbi(sb)->ll_stats_track_id = pid;
578 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
580 ll_s2sbi(sb)->ll_stats_track_type = type;
581 lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
585 static int ll_track_pid_seq_show(struct seq_file *m, void *v)
587 return ll_rd_track_id(m, STATS_TRACK_PID);
590 static ssize_t ll_track_pid_seq_write(struct file *file, const char *buffer,
591 size_t count, loff_t *off)
593 struct seq_file *seq = file->private_data;
594 return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PID);
596 LPROC_SEQ_FOPS(ll_track_pid);
598 static int ll_track_ppid_seq_show(struct seq_file *m, void *v)
600 return ll_rd_track_id(m, STATS_TRACK_PPID);
603 static ssize_t ll_track_ppid_seq_write(struct file *file, const char *buffer,
604 size_t count, loff_t *off)
606 struct seq_file *seq = file->private_data;
607 return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PPID);
609 LPROC_SEQ_FOPS(ll_track_ppid);
611 static int ll_track_gid_seq_show(struct seq_file *m, void *v)
613 return ll_rd_track_id(m, STATS_TRACK_GID);
616 static ssize_t ll_track_gid_seq_write(struct file *file, const char *buffer,
617 size_t count, loff_t *off)
619 struct seq_file *seq = file->private_data;
620 return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_GID);
622 LPROC_SEQ_FOPS(ll_track_gid);
624 static int ll_statahead_max_seq_show(struct seq_file *m, void *v)
626 struct super_block *sb = m->private;
627 struct ll_sb_info *sbi = ll_s2sbi(sb);
629 return seq_printf(m, "%u\n", sbi->ll_sa_max);
632 static ssize_t ll_statahead_max_seq_write(struct file *file, const char *buffer,
633 size_t count, loff_t *off)
635 struct seq_file *m = file->private_data;
636 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
639 rc = lprocfs_write_helper(buffer, count, &val);
643 if (val >= 0 && val <= LL_SA_RPC_MAX)
644 sbi->ll_sa_max = val;
646 CERROR("Bad statahead_max value %d. Valid values are in the "
647 "range [0, %d]\n", val, LL_SA_RPC_MAX);
651 LPROC_SEQ_FOPS(ll_statahead_max);
653 static int ll_statahead_agl_seq_show(struct seq_file *m, void *v)
655 struct super_block *sb = m->private;
656 struct ll_sb_info *sbi = ll_s2sbi(sb);
658 return seq_printf(m, "%u\n",
659 sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
662 static ssize_t ll_statahead_agl_seq_write(struct file *file, const char *buffer,
663 size_t count, loff_t *off)
665 struct seq_file *m = file->private_data;
666 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
669 rc = lprocfs_write_helper(buffer, count, &val);
674 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
676 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
680 LPROC_SEQ_FOPS(ll_statahead_agl);
682 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
684 struct super_block *sb = m->private;
685 struct ll_sb_info *sbi = ll_s2sbi(sb);
688 "statahead total: %u\n"
689 "statahead wrong: %u\n"
691 atomic_read(&sbi->ll_sa_total),
692 atomic_read(&sbi->ll_sa_wrong),
693 atomic_read(&sbi->ll_agl_total));
695 LPROC_SEQ_FOPS_RO(ll_statahead_stats);
697 static int ll_lazystatfs_seq_show(struct seq_file *m, void *v)
699 struct super_block *sb = m->private;
700 struct ll_sb_info *sbi = ll_s2sbi(sb);
702 return seq_printf(m, "%u\n",
703 (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
706 static ssize_t ll_lazystatfs_seq_write(struct file *file, const char *buffer,
707 size_t count, loff_t *off)
709 struct seq_file *m = file->private_data;
710 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
713 rc = lprocfs_write_helper(buffer, count, &val);
718 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
720 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
724 LPROC_SEQ_FOPS(ll_lazystatfs);
726 static int ll_maxea_size_seq_show(struct seq_file *m, void *v)
728 struct super_block *sb = m->private;
729 struct ll_sb_info *sbi = ll_s2sbi(sb);
733 rc = ll_get_max_mdsize(sbi, &ealen);
737 return seq_printf(m, "%u\n", ealen);
739 LPROC_SEQ_FOPS_RO(ll_maxea_size);
741 static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
743 const char *str[] = LL_SBI_FLAGS;
744 struct super_block *sb = m->private;
745 int flags = ll_s2sbi(sb)->ll_flags;
749 if (ARRAY_SIZE(str) <= i) {
750 CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
751 "flags please.\n", ll_get_fsname(sb, NULL, 0));
756 seq_printf(m, "%s ", str[i]);
760 seq_printf(m, "\b\n");
763 LPROC_SEQ_FOPS_RO(ll_sbi_flags);
765 static int ll_unstable_stats_seq_show(struct seq_file *m, void *v)
767 struct super_block *sb = m->private;
768 struct ll_sb_info *sbi = ll_s2sbi(sb);
769 struct cl_client_cache *cache = &sbi->ll_cache;
772 pages = cfs_atomic_read(&cache->ccc_unstable_nr);
773 mb = (pages * PAGE_CACHE_SIZE) >> 20;
775 return seq_printf(m, "unstable_pages: %8d\n"
776 "unstable_mb: %8d\n", pages, mb);
778 LPROC_SEQ_FOPS_RO(ll_unstable_stats);
780 struct lprocfs_seq_vars lprocfs_llite_obd_vars[] = {
782 .fops = &ll_sb_uuid_fops },
784 .fops = &ll_fstype_fops },
786 .fops = &ll_site_stats_fops },
787 { .name = "blocksize",
788 .fops = &ll_blksize_fops },
789 { .name = "kbytestotal",
790 .fops = &ll_kbytestotal_fops },
791 { .name = "kbytesfree",
792 .fops = &ll_kbytesfree_fops },
793 { .name = "kbytesavail",
794 .fops = &ll_kbytesavail_fops },
795 { .name = "filestotal",
796 .fops = &ll_filestotal_fops },
797 { .name = "filesfree",
798 .fops = &ll_filesfree_fops },
799 { .name = "client_type",
800 .fops = &ll_client_type_fops },
801 { .name = "max_read_ahead_mb",
802 .fops = &ll_max_readahead_mb_fops },
803 { .name = "max_read_ahead_per_file_mb",
804 .fops = &ll_max_readahead_per_file_mb_fops },
805 { .name = "max_read_ahead_whole_mb",
806 .fops = &ll_max_read_ahead_whole_mb_fops },
807 { .name = "max_cached_mb",
808 .fops = &ll_max_cached_mb_fops },
809 { .name = "checksum_pages",
810 .fops = &ll_checksum_fops },
811 { .name = "max_rw_chunk",
812 .fops = &ll_max_rw_chunk_fops },
813 { .name = "stats_track_pid",
814 .fops = &ll_track_pid_fops },
815 { .name = "stats_track_ppid",
816 .fops = &ll_track_ppid_fops },
817 { .name = "stats_track_gid",
818 .fops = &ll_track_gid_fops },
819 { .name = "statahead_max",
820 .fops = &ll_statahead_max_fops },
821 { .name = "statahead_agl",
822 .fops = &ll_statahead_agl_fops },
823 { .name = "statahead_stats",
824 .fops = &ll_statahead_stats_fops },
825 { .name = "lazystatfs",
826 .fops = &ll_lazystatfs_fops },
827 { .name = "max_easize",
828 .fops = &ll_maxea_size_fops },
829 { .name = "sbi_flags",
830 .fops = &ll_sbi_flags_fops },
831 { .name = "xattr_cache",
832 .fops = &ll_xattr_cache_fops },
833 { .name = "unstable_stats",
834 .fops = &ll_unstable_stats_fops },
838 #define MAX_STRING_SIZE 128
840 struct llite_file_opcode {
844 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
846 { LPROC_LL_DIRTY_HITS, LPROCFS_TYPE_REGS, "dirty_pages_hits" },
847 { LPROC_LL_DIRTY_MISSES, LPROCFS_TYPE_REGS, "dirty_pages_misses" },
848 { LPROC_LL_READ_BYTES, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
850 { LPROC_LL_WRITE_BYTES, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
852 { LPROC_LL_BRW_READ, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
854 { LPROC_LL_BRW_WRITE, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
856 { LPROC_LL_OSC_READ, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
858 { LPROC_LL_OSC_WRITE, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
860 { LPROC_LL_IOCTL, LPROCFS_TYPE_REGS, "ioctl" },
861 { LPROC_LL_OPEN, LPROCFS_TYPE_REGS, "open" },
862 { LPROC_LL_RELEASE, LPROCFS_TYPE_REGS, "close" },
863 { LPROC_LL_MAP, LPROCFS_TYPE_REGS, "mmap" },
864 { LPROC_LL_LLSEEK, LPROCFS_TYPE_REGS, "seek" },
865 { LPROC_LL_FSYNC, LPROCFS_TYPE_REGS, "fsync" },
866 { LPROC_LL_READDIR, LPROCFS_TYPE_REGS, "readdir" },
867 /* inode operation */
868 { LPROC_LL_SETATTR, LPROCFS_TYPE_REGS, "setattr" },
869 { LPROC_LL_TRUNC, LPROCFS_TYPE_REGS, "truncate" },
870 { LPROC_LL_FLOCK, LPROCFS_TYPE_REGS, "flock" },
871 { LPROC_LL_GETATTR, LPROCFS_TYPE_REGS, "getattr" },
872 /* dir inode operation */
873 { LPROC_LL_CREATE, LPROCFS_TYPE_REGS, "create" },
874 { LPROC_LL_LINK, LPROCFS_TYPE_REGS, "link" },
875 { LPROC_LL_UNLINK, LPROCFS_TYPE_REGS, "unlink" },
876 { LPROC_LL_SYMLINK, LPROCFS_TYPE_REGS, "symlink" },
877 { LPROC_LL_MKDIR, LPROCFS_TYPE_REGS, "mkdir" },
878 { LPROC_LL_RMDIR, LPROCFS_TYPE_REGS, "rmdir" },
879 { LPROC_LL_MKNOD, LPROCFS_TYPE_REGS, "mknod" },
880 { LPROC_LL_RENAME, LPROCFS_TYPE_REGS, "rename" },
881 /* special inode operation */
882 { LPROC_LL_STAFS, LPROCFS_TYPE_REGS, "statfs" },
883 { LPROC_LL_ALLOC_INODE, LPROCFS_TYPE_REGS, "alloc_inode" },
884 { LPROC_LL_SETXATTR, LPROCFS_TYPE_REGS, "setxattr" },
885 { LPROC_LL_GETXATTR, LPROCFS_TYPE_REGS, "getxattr" },
886 { LPROC_LL_GETXATTR_HITS, LPROCFS_TYPE_REGS, "getxattr_hits" },
887 { LPROC_LL_LISTXATTR, LPROCFS_TYPE_REGS, "listxattr" },
888 { LPROC_LL_REMOVEXATTR, LPROCFS_TYPE_REGS, "removexattr" },
889 { LPROC_LL_INODE_PERM, LPROCFS_TYPE_REGS, "inode_permission" },
892 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
896 if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
897 lprocfs_counter_add(sbi->ll_stats, op, count);
898 else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
899 sbi->ll_stats_track_id == current->pid)
900 lprocfs_counter_add(sbi->ll_stats, op, count);
901 else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
902 sbi->ll_stats_track_id == current->parent->pid)
903 lprocfs_counter_add(sbi->ll_stats, op, count);
904 else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
905 sbi->ll_stats_track_id == current_gid())
906 lprocfs_counter_add(sbi->ll_stats, op, count);
908 EXPORT_SYMBOL(ll_stats_ops_tally);
910 static const char *ra_stat_string[] = {
911 [RA_STAT_HIT] = "hits",
912 [RA_STAT_MISS] = "misses",
913 [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
914 [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
915 [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
916 [RA_STAT_FAILED_MATCH] = "failed lock match",
917 [RA_STAT_DISCARDED] = "read but discarded",
918 [RA_STAT_ZERO_LEN] = "zero length file",
919 [RA_STAT_ZERO_WINDOW] = "zero size window",
920 [RA_STAT_EOF] = "read-ahead to EOF",
921 [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
922 [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
923 [RA_STAT_FAILED_REACH_END] = "failed to reach end"
926 LPROC_SEQ_FOPS_RO_TYPE(llite, name);
927 LPROC_SEQ_FOPS_RO_TYPE(llite, uuid);
929 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
930 struct super_block *sb, char *osc, char *mdc)
932 struct lprocfs_seq_vars lvars[2];
933 struct lustre_sb_info *lsi = s2lsi(sb);
934 struct ll_sb_info *sbi = ll_s2sbi(sb);
935 struct obd_device *obd;
936 struct proc_dir_entry *dir;
937 char name[MAX_STRING_SIZE + 1], *ptr;
938 int err, id, len, rc;
941 memset(lvars, 0, sizeof(lvars));
943 name[MAX_STRING_SIZE] = '\0';
944 lvars[0].name = name;
946 LASSERT(sbi != NULL);
947 LASSERT(mdc != NULL);
948 LASSERT(osc != NULL);
951 len = strlen(lsi->lsi_lmd->lmd_profile);
952 ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
953 if (ptr && (strcmp(ptr, "-client") == 0))
957 snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
958 lsi->lsi_lmd->lmd_profile, sb);
960 sbi->ll_proc_root = lprocfs_seq_register(name, parent, NULL, NULL);
961 if (IS_ERR(sbi->ll_proc_root)) {
962 err = PTR_ERR(sbi->ll_proc_root);
963 sbi->ll_proc_root = NULL;
967 rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
968 &vvp_dump_pgcache_file_ops, sbi);
970 CWARN("Error adding the dump_page_cache file\n");
972 rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
973 &ll_rw_extents_stats_fops, sbi);
975 CWARN("Error adding the extent_stats file\n");
977 rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
978 0644, &ll_rw_extents_stats_pp_fops, sbi);
980 CWARN("Error adding the extents_stats_per_process file\n");
982 rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
983 &ll_rw_offset_stats_fops, sbi);
985 CWARN("Error adding the offset_stats file\n");
987 /* File operations stats */
988 sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
989 LPROCFS_STATS_FLAG_NONE);
990 if (sbi->ll_stats == NULL)
991 GOTO(out, err = -ENOMEM);
992 /* do counter init */
993 for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
994 __u32 type = llite_opcode_table[id].type;
996 if (type & LPROCFS_TYPE_REGS)
998 else if (type & LPROCFS_TYPE_BYTES)
1000 else if (type & LPROCFS_TYPE_PAGES)
1002 lprocfs_counter_init(sbi->ll_stats,
1003 llite_opcode_table[id].opcode,
1004 (type & LPROCFS_CNTR_AVGMINMAX),
1005 llite_opcode_table[id].opname, ptr);
1007 err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
1011 sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1012 LPROCFS_STATS_FLAG_NONE);
1013 if (sbi->ll_ra_stats == NULL)
1014 GOTO(out, err = -ENOMEM);
1016 for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1017 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
1018 ra_stat_string[id], "pages");
1019 err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
1025 err = lprocfs_seq_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
1030 obd = class_name2obd(mdc);
1032 LASSERT(obd != NULL);
1033 LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1034 LASSERT(obd->obd_type->typ_name != NULL);
1036 dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1038 GOTO(out, err = -ENOMEM);
1040 snprintf(name, MAX_STRING_SIZE, "common_name");
1041 lvars[0].fops = &llite_name_fops;
1042 err = lprocfs_seq_add_vars(dir, lvars, obd);
1046 snprintf(name, MAX_STRING_SIZE, "uuid");
1047 lvars[0].fops = &llite_uuid_fops;
1048 err = lprocfs_seq_add_vars(dir, lvars, obd);
1053 obd = class_name2obd(osc);
1055 LASSERT(obd != NULL);
1056 LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1057 LASSERT(obd->obd_type->typ_name != NULL);
1059 dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1061 GOTO(out, err = -ENOMEM);
1063 snprintf(name, MAX_STRING_SIZE, "common_name");
1064 lvars[0].fops = &llite_name_fops;
1065 err = lprocfs_seq_add_vars(dir, lvars, obd);
1069 snprintf(name, MAX_STRING_SIZE, "uuid");
1070 lvars[0].fops = &llite_uuid_fops;
1071 err = lprocfs_seq_add_vars(dir, lvars, obd);
1074 lprocfs_remove(&sbi->ll_proc_root);
1075 lprocfs_free_stats(&sbi->ll_ra_stats);
1076 lprocfs_free_stats(&sbi->ll_stats);
1081 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
1083 if (sbi->ll_proc_root) {
1084 lprocfs_remove(&sbi->ll_proc_root);
1085 lprocfs_free_stats(&sbi->ll_ra_stats);
1086 lprocfs_free_stats(&sbi->ll_stats);
1089 #undef MAX_STRING_SIZE
1091 #define pct(a,b) (b ? a * 100 / b : 0)
1093 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1094 struct seq_file *seq, int which)
1096 unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1097 unsigned long start, end, r, w;
1098 char *unitp = "KMGTPEZY";
1100 struct per_process_info *pp_info = &io_extents->pp_extents[which];
1106 for(i = 0; i < LL_HIST_MAX; i++) {
1107 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1108 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1111 for(i = 0; i < LL_HIST_MAX; i++) {
1112 r = pp_info->pp_r_hist.oh_buckets[i];
1113 w = pp_info->pp_w_hist.oh_buckets[i];
1116 end = 1 << (i + LL_HIST_START - units);
1117 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu | "
1118 "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
1119 (i == LL_HIST_MAX - 1) ? '+' : ' ',
1120 r, pct(r, read_tot), pct(read_cum, read_tot),
1121 w, pct(w, write_tot), pct(write_cum, write_tot));
1123 if (start == 1<<10) {
1128 if (read_cum == read_tot && write_cum == write_tot)
1133 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1136 struct ll_sb_info *sbi = seq->private;
1137 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1140 do_gettimeofday(&now);
1142 if (!sbi->ll_rw_stats_on) {
1143 seq_printf(seq, "disabled\n"
1144 "write anything in this file to activate, "
1145 "then 0 or \"[D/d]isabled\" to deactivate\n");
1148 seq_printf(seq, "snapshot_time: %lu.%lu (secs.usecs)\n",
1149 now.tv_sec, now.tv_usec);
1150 seq_printf(seq, "%15s %19s | %20s\n", " ", "read", "write");
1151 seq_printf(seq, "%13s %14s %4s %4s | %14s %4s %4s\n",
1152 "extents", "calls", "%", "cum%",
1153 "calls", "%", "cum%");
1154 spin_lock(&sbi->ll_pp_extent_lock);
1155 for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1156 if (io_extents->pp_extents[k].pid != 0) {
1157 seq_printf(seq, "\nPID: %d\n",
1158 io_extents->pp_extents[k].pid);
1159 ll_display_extents_info(io_extents, seq, k);
1162 spin_unlock(&sbi->ll_pp_extent_lock);
1166 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1167 const char *buf, size_t len,
1170 struct seq_file *seq = file->private_data;
1171 struct ll_sb_info *sbi = seq->private;
1172 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1174 int value = 1, rc = 0;
1176 rc = lprocfs_write_helper(buf, len, &value);
1177 if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1178 strcmp(buf, "Disabled") == 0))
1182 sbi->ll_rw_stats_on = 0;
1184 sbi->ll_rw_stats_on = 1;
1186 spin_lock(&sbi->ll_pp_extent_lock);
1187 for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1188 io_extents->pp_extents[i].pid = 0;
1189 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1190 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1192 spin_unlock(&sbi->ll_pp_extent_lock);
1196 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1198 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1201 struct ll_sb_info *sbi = seq->private;
1202 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1204 do_gettimeofday(&now);
1206 if (!sbi->ll_rw_stats_on) {
1207 seq_printf(seq, "disabled\n"
1208 "write anything in this file to activate, "
1209 "then 0 or \"[D/d]isabled\" to deactivate\n");
1212 seq_printf(seq, "snapshot_time: %lu.%lu (secs.usecs)\n",
1213 now.tv_sec, now.tv_usec);
1215 seq_printf(seq, "%15s %19s | %20s\n", " ", "read", "write");
1216 seq_printf(seq, "%13s %14s %4s %4s | %14s %4s %4s\n",
1217 "extents", "calls", "%", "cum%",
1218 "calls", "%", "cum%");
1219 spin_lock(&sbi->ll_lock);
1220 ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1221 spin_unlock(&sbi->ll_lock);
1226 static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf,
1227 size_t len, loff_t *off)
1229 struct seq_file *seq = file->private_data;
1230 struct ll_sb_info *sbi = seq->private;
1231 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1233 int value = 1, rc = 0;
1235 rc = lprocfs_write_helper(buf, len, &value);
1236 if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1237 strcmp(buf, "Disabled") == 0))
1241 sbi->ll_rw_stats_on = 0;
1243 sbi->ll_rw_stats_on = 1;
1244 spin_lock(&sbi->ll_pp_extent_lock);
1245 for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1246 io_extents->pp_extents[i].pid = 0;
1247 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1248 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1250 spin_unlock(&sbi->ll_pp_extent_lock);
1255 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1257 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1258 struct ll_file_data *file, loff_t pos,
1259 size_t count, int rw)
1262 struct ll_rw_process_info *process;
1263 struct ll_rw_process_info *offset;
1264 int *off_count = &sbi->ll_rw_offset_entry_count;
1265 int *process_count = &sbi->ll_offset_process_count;
1266 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1268 if(!sbi->ll_rw_stats_on)
1270 process = sbi->ll_rw_process_info;
1271 offset = sbi->ll_rw_offset_info;
1273 spin_lock(&sbi->ll_pp_extent_lock);
1274 /* Extent statistics */
1275 for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1276 if(io_extents->pp_extents[i].pid == pid) {
1284 sbi->ll_extent_process_count =
1285 (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1286 cur = sbi->ll_extent_process_count;
1287 io_extents->pp_extents[cur].pid = pid;
1288 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1289 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1292 for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1293 (i < (LL_HIST_MAX - 1)); i++);
1295 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1296 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1298 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1299 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1301 spin_unlock(&sbi->ll_pp_extent_lock);
1303 spin_lock(&sbi->ll_process_lock);
1304 /* Offset statistics */
1305 for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1306 if (process[i].rw_pid == pid) {
1307 if (process[i].rw_last_file != file) {
1308 process[i].rw_range_start = pos;
1309 process[i].rw_last_file_pos = pos + count;
1310 process[i].rw_smallest_extent = count;
1311 process[i].rw_largest_extent = count;
1312 process[i].rw_offset = 0;
1313 process[i].rw_last_file = file;
1314 spin_unlock(&sbi->ll_process_lock);
1317 if (process[i].rw_last_file_pos != pos) {
1319 (*off_count + 1) % LL_OFFSET_HIST_MAX;
1320 offset[*off_count].rw_op = process[i].rw_op;
1321 offset[*off_count].rw_pid = pid;
1322 offset[*off_count].rw_range_start =
1323 process[i].rw_range_start;
1324 offset[*off_count].rw_range_end =
1325 process[i].rw_last_file_pos;
1326 offset[*off_count].rw_smallest_extent =
1327 process[i].rw_smallest_extent;
1328 offset[*off_count].rw_largest_extent =
1329 process[i].rw_largest_extent;
1330 offset[*off_count].rw_offset =
1331 process[i].rw_offset;
1332 process[i].rw_op = rw;
1333 process[i].rw_range_start = pos;
1334 process[i].rw_smallest_extent = count;
1335 process[i].rw_largest_extent = count;
1336 process[i].rw_offset = pos -
1337 process[i].rw_last_file_pos;
1339 if(process[i].rw_smallest_extent > count)
1340 process[i].rw_smallest_extent = count;
1341 if(process[i].rw_largest_extent < count)
1342 process[i].rw_largest_extent = count;
1343 process[i].rw_last_file_pos = pos + count;
1344 spin_unlock(&sbi->ll_process_lock);
1348 *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1349 process[*process_count].rw_pid = pid;
1350 process[*process_count].rw_op = rw;
1351 process[*process_count].rw_range_start = pos;
1352 process[*process_count].rw_last_file_pos = pos + count;
1353 process[*process_count].rw_smallest_extent = count;
1354 process[*process_count].rw_largest_extent = count;
1355 process[*process_count].rw_offset = 0;
1356 process[*process_count].rw_last_file = file;
1357 spin_unlock(&sbi->ll_process_lock);
1360 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1363 struct ll_sb_info *sbi = seq->private;
1364 struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1365 struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1368 do_gettimeofday(&now);
1370 if (!sbi->ll_rw_stats_on) {
1371 seq_printf(seq, "disabled\n"
1372 "write anything in this file to activate, "
1373 "then 0 or \"[D/d]isabled\" to deactivate\n");
1376 spin_lock(&sbi->ll_process_lock);
1378 seq_printf(seq, "snapshot_time: %lu.%lu (secs.usecs)\n",
1379 now.tv_sec, now.tv_usec);
1380 seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1381 "R/W", "PID", "RANGE START", "RANGE END",
1382 "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1384 /* We stored the discontiguous offsets here; print them first */
1385 for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1386 if (offset[i].rw_pid != 0)
1388 "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1389 offset[i].rw_op == READ ? 'R' : 'W',
1391 offset[i].rw_range_start,
1392 offset[i].rw_range_end,
1393 (unsigned long)offset[i].rw_smallest_extent,
1394 (unsigned long)offset[i].rw_largest_extent,
1395 offset[i].rw_offset);
1398 /* Then print the current offsets for each process */
1399 for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1400 if (process[i].rw_pid != 0)
1402 "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1403 process[i].rw_op == READ ? 'R' : 'W',
1405 process[i].rw_range_start,
1406 process[i].rw_last_file_pos,
1407 (unsigned long)process[i].rw_smallest_extent,
1408 (unsigned long)process[i].rw_largest_extent,
1409 process[i].rw_offset);
1411 spin_unlock(&sbi->ll_process_lock);
1416 static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf,
1417 size_t len, loff_t *off)
1419 struct seq_file *seq = file->private_data;
1420 struct ll_sb_info *sbi = seq->private;
1421 struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1422 struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1423 int value = 1, rc = 0;
1425 rc = lprocfs_write_helper(buf, len, &value);
1427 if (rc < 0 && (strcmp(buf, "disabled") == 0 ||
1428 strcmp(buf, "Disabled") == 0))
1432 sbi->ll_rw_stats_on = 0;
1434 sbi->ll_rw_stats_on = 1;
1436 spin_lock(&sbi->ll_process_lock);
1437 sbi->ll_offset_process_count = 0;
1438 sbi->ll_rw_offset_entry_count = 0;
1439 memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1440 LL_PROCESS_HIST_MAX);
1441 memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1442 LL_OFFSET_HIST_MAX);
1443 spin_unlock(&sbi->ll_process_lock);
1448 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1449 #endif /* LPROCFS */