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, 2015, 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 <linux/user_namespace.h>
40 #ifdef HAVE_UIDGID_HEADER
41 # include <linux/uidgid.h>
43 #include <lustre_param.h>
44 #include <lprocfs_status.h>
45 #include <obd_support.h>
47 #include "llite_internal.h"
48 #include "vvp_internal.h"
50 struct proc_dir_entry *proc_lustre_fs_root;
53 /* /proc/lustre/llite mount point registration */
54 static const struct file_operations ll_rw_extents_stats_fops;
55 static const struct file_operations ll_rw_extents_stats_pp_fops;
56 static const struct file_operations ll_rw_offset_stats_fops;
58 static int ll_blksize_seq_show(struct seq_file *m, void *v)
60 struct super_block *sb = m->private;
61 struct obd_statfs osfs;
65 rc = ll_statfs_internal(sb, &osfs,
66 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
69 seq_printf(m, "%u\n", osfs.os_bsize);
72 LPROC_SEQ_FOPS_RO(ll_blksize);
74 static int ll_kbytestotal_seq_show(struct seq_file *m, void *v)
76 struct super_block *sb = m->private;
77 struct obd_statfs osfs;
81 rc = ll_statfs_internal(sb, &osfs,
82 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
85 __u32 blk_size = osfs.os_bsize >> 10;
86 __u64 result = osfs.os_blocks;
88 while (blk_size >>= 1)
91 seq_printf(m, LPU64"\n", result);
95 LPROC_SEQ_FOPS_RO(ll_kbytestotal);
97 static int ll_kbytesfree_seq_show(struct seq_file *m, void *v)
99 struct super_block *sb = m->private;
100 struct obd_statfs osfs;
104 rc = ll_statfs_internal(sb, &osfs,
105 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
108 __u32 blk_size = osfs.os_bsize >> 10;
109 __u64 result = osfs.os_bfree;
111 while (blk_size >>= 1)
114 seq_printf(m, LPU64"\n", result);
118 LPROC_SEQ_FOPS_RO(ll_kbytesfree);
120 static int ll_kbytesavail_seq_show(struct seq_file *m, void *v)
122 struct super_block *sb = m->private;
123 struct obd_statfs osfs;
127 rc = ll_statfs_internal(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 seq_printf(m, LPU64"\n", result);
141 LPROC_SEQ_FOPS_RO(ll_kbytesavail);
143 static int ll_filestotal_seq_show(struct seq_file *m, void *v)
145 struct super_block *sb = m->private;
146 struct obd_statfs osfs;
150 rc = ll_statfs_internal(sb, &osfs,
151 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
154 seq_printf(m, LPU64"\n", osfs.os_files);
157 LPROC_SEQ_FOPS_RO(ll_filestotal);
159 static int ll_filesfree_seq_show(struct seq_file *m, void *v)
161 struct super_block *sb = m->private;
162 struct obd_statfs osfs;
166 rc = ll_statfs_internal(sb, &osfs,
167 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
170 seq_printf(m, LPU64"\n", osfs.os_ffree);
173 LPROC_SEQ_FOPS_RO(ll_filesfree);
175 static int ll_client_type_seq_show(struct seq_file *m, void *v)
177 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
179 LASSERT(sbi != NULL);
181 if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
182 seq_puts(m, "remote client\n");
184 seq_puts(m, "local client\n");
187 LPROC_SEQ_FOPS_RO(ll_client_type);
189 static int ll_fstype_seq_show(struct seq_file *m, void *v)
191 struct super_block *sb = m->private;
194 seq_printf(m, "%s\n", sb->s_type->name);
197 LPROC_SEQ_FOPS_RO(ll_fstype);
199 static int ll_sb_uuid_seq_show(struct seq_file *m, void *v)
201 struct super_block *sb = m->private;
204 seq_printf(m, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid);
207 LPROC_SEQ_FOPS_RO(ll_sb_uuid);
209 static int ll_xattr_cache_seq_show(struct seq_file *m, void *v)
211 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
213 seq_printf(m, "%u\n", sbi->ll_xattr_cache_enabled);
217 static ssize_t ll_xattr_cache_seq_write(struct file *file,
218 const char __user *buffer,
219 size_t count, loff_t *off)
221 struct seq_file *m = file->private_data;
222 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
225 rc = lprocfs_write_helper(buffer, count, &val);
229 if (val != 0 && val != 1)
232 if (val == 1 && !(sbi->ll_flags & LL_SBI_XATTR_CACHE))
235 sbi->ll_xattr_cache_enabled = val;
239 LPROC_SEQ_FOPS(ll_xattr_cache);
241 static int ll_site_stats_seq_show(struct seq_file *m, void *v)
243 struct super_block *sb = m->private;
246 * See description of statistical counters in struct cl_site, and
249 return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site), m);
251 LPROC_SEQ_FOPS_RO(ll_site_stats);
253 static int ll_max_readahead_mb_seq_show(struct seq_file *m, void *v)
255 struct super_block *sb = m->private;
256 struct ll_sb_info *sbi = ll_s2sbi(sb);
260 spin_lock(&sbi->ll_lock);
261 pages_number = sbi->ll_ra_info.ra_max_pages;
262 spin_unlock(&sbi->ll_lock);
264 mult = 1 << (20 - PAGE_CACHE_SHIFT);
265 return lprocfs_seq_read_frac_helper(m, pages_number, mult);
269 ll_max_readahead_mb_seq_write(struct file *file, const char __user *buffer,
270 size_t count, loff_t *off)
272 struct seq_file *m = file->private_data;
273 struct super_block *sb = m->private;
274 struct ll_sb_info *sbi = ll_s2sbi(sb);
280 pages_shift = 20 - PAGE_CACHE_SHIFT;
281 rc = lprocfs_write_frac_u64_helper(buffer, count, &val,
288 pages_number = (long)val;
290 if (pages_number < 0 || pages_number > totalram_pages / 2) {
292 CERROR("%s: can't set max_readahead_mb=%lu > %luMB\n",
293 ll_get_fsname(sb, NULL, 0), pages_number >> pages_shift,
294 totalram_pages >> (pages_shift + 1));
298 spin_lock(&sbi->ll_lock);
299 sbi->ll_ra_info.ra_max_pages = pages_number;
300 spin_unlock(&sbi->ll_lock);
303 LPROC_SEQ_FOPS(ll_max_readahead_mb);
305 static int ll_max_readahead_per_file_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_per_file;
314 spin_unlock(&sbi->ll_lock);
316 mult = 1 << (20 - PAGE_CACHE_SHIFT);
317 return lprocfs_seq_read_frac_helper(m, pages_number, mult);
321 ll_max_readahead_per_file_mb_seq_write(struct file *file,
322 const char __user *buffer,
323 size_t count, loff_t *off)
325 struct seq_file *m = file->private_data;
326 struct super_block *sb = m->private;
327 struct ll_sb_info *sbi = ll_s2sbi(sb);
328 int pages_shift, rc, pages_number;
330 pages_shift = 20 - PAGE_CACHE_SHIFT;
331 rc = lprocfs_write_frac_helper(buffer, count, &pages_number,
336 if (pages_number < 0 || pages_number > sbi->ll_ra_info.ra_max_pages) {
337 CERROR("%s: can't set max_readahead_per_file_mb=%u > "
338 "max_read_ahead_mb=%lu\n", ll_get_fsname(sb, NULL, 0),
339 pages_number >> pages_shift,
340 sbi->ll_ra_info.ra_max_pages >> pages_shift);
344 spin_lock(&sbi->ll_lock);
345 sbi->ll_ra_info.ra_max_pages_per_file = pages_number;
346 spin_unlock(&sbi->ll_lock);
349 LPROC_SEQ_FOPS(ll_max_readahead_per_file_mb);
351 static int ll_max_read_ahead_whole_mb_seq_show(struct seq_file *m, void *v)
353 struct super_block *sb = m->private;
354 struct ll_sb_info *sbi = ll_s2sbi(sb);
358 spin_lock(&sbi->ll_lock);
359 pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages;
360 spin_unlock(&sbi->ll_lock);
362 mult = 1 << (20 - PAGE_CACHE_SHIFT);
363 return lprocfs_seq_read_frac_helper(m, pages_number, mult);
367 ll_max_read_ahead_whole_mb_seq_write(struct file *file,
368 const char __user *buffer,
369 size_t count, loff_t *off)
371 struct seq_file *m = file->private_data;
372 struct super_block *sb = m->private;
373 struct ll_sb_info *sbi = ll_s2sbi(sb);
374 int pages_shift, rc, pages_number;
376 pages_shift = 20 - PAGE_CACHE_SHIFT;
377 rc = lprocfs_write_frac_helper(buffer, count, &pages_number,
382 /* Cap this at the current max readahead window size, the readahead
383 * algorithm does this anyway so it's pointless to set it larger. */
384 if (pages_number < 0 ||
385 pages_number > sbi->ll_ra_info.ra_max_pages_per_file) {
386 CERROR("%s: can't set max_read_ahead_whole_mb=%u > "
387 "max_read_ahead_per_file_mb=%lu\n",
388 ll_get_fsname(sb, NULL, 0),
389 pages_number >> pages_shift,
390 sbi->ll_ra_info.ra_max_pages_per_file >> pages_shift);
394 spin_lock(&sbi->ll_lock);
395 sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number;
396 spin_unlock(&sbi->ll_lock);
399 LPROC_SEQ_FOPS(ll_max_read_ahead_whole_mb);
401 static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v)
403 struct super_block *sb = m->private;
404 struct ll_sb_info *sbi = ll_s2sbi(sb);
405 struct cl_client_cache *cache = sbi->ll_cache;
406 int shift = 20 - PAGE_CACHE_SHIFT;
410 max_cached_mb = cache->ccc_lru_max >> shift;
411 unused_mb = atomic_long_read(&cache->ccc_lru_left) >> shift;
412 seq_printf(m, "users: %d\n"
413 "max_cached_mb: %ld\n"
416 "reclaim_count: %u\n",
417 atomic_read(&cache->ccc_users),
419 max_cached_mb - unused_mb,
421 cache->ccc_lru_shrinkers);
426 ll_max_cached_mb_seq_write(struct file *file, const char __user *buffer,
427 size_t count, loff_t *off)
429 struct seq_file *m = file->private_data;
430 struct super_block *sb = m->private;
431 struct ll_sb_info *sbi = ll_s2sbi(sb);
432 struct cl_client_cache *cache = sbi->ll_cache;
444 if (count >= sizeof(kernbuf))
447 if (copy_from_user(kernbuf, buffer, count))
451 mult = 1 << (20 - PAGE_CACHE_SHIFT);
452 buffer += lprocfs_find_named_value(kernbuf, "max_cached_mb:", &count) -
454 rc = lprocfs_write_frac_u64_helper(buffer, count, &val, mult);
460 pages_number = (long)val;
462 if (pages_number < 0 || pages_number > totalram_pages) {
463 CERROR("%s: can't set max cache more than %lu MB\n",
464 ll_get_fsname(sb, NULL, 0),
465 totalram_pages >> (20 - PAGE_CACHE_SHIFT));
468 /* Allow enough cache so clients can make well-formed RPCs */
469 pages_number = max_t(long, pages_number, PTLRPC_MAX_BRW_PAGES);
471 spin_lock(&sbi->ll_lock);
472 diff = pages_number - cache->ccc_lru_max;
473 spin_unlock(&sbi->ll_lock);
475 /* easy - add more LRU slots. */
477 atomic_long_add(diff, &cache->ccc_lru_left);
481 env = cl_env_get(&refcheck);
489 /* reduce LRU budget from free slots. */
493 ov = atomic_long_read(&cache->ccc_lru_left);
497 nv = ov > diff ? ov - diff : 0;
498 rc = atomic_long_cmpxchg(&cache->ccc_lru_left, ov, nv);
499 if (likely(ov == rc)) {
509 if (sbi->ll_dt_exp == NULL) { /* being initialized */
514 /* difficult - have to ask OSCs to drop LRU slots. */
516 rc = obd_set_info_async(env, sbi->ll_dt_exp,
517 sizeof(KEY_CACHE_LRU_SHRINK),
518 KEY_CACHE_LRU_SHRINK,
519 sizeof(tmp), &tmp, NULL);
523 cl_env_put(env, &refcheck);
527 spin_lock(&sbi->ll_lock);
528 cache->ccc_lru_max = pages_number;
529 spin_unlock(&sbi->ll_lock);
532 atomic_long_add(nrpages, &cache->ccc_lru_left);
536 LPROC_SEQ_FOPS(ll_max_cached_mb);
538 static int ll_checksum_seq_show(struct seq_file *m, void *v)
540 struct super_block *sb = m->private;
541 struct ll_sb_info *sbi = ll_s2sbi(sb);
543 seq_printf(m, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0);
547 static ssize_t ll_checksum_seq_write(struct file *file,
548 const char __user *buffer,
549 size_t count, loff_t *off)
551 struct seq_file *m = file->private_data;
552 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
559 rc = lprocfs_write_helper(buffer, count, &val);
563 sbi->ll_flags |= LL_SBI_CHECKSUM;
565 sbi->ll_flags &= ~LL_SBI_CHECKSUM;
567 rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM),
568 KEY_CHECKSUM, sizeof(val), &val, NULL);
570 CWARN("Failed to set OSC checksum flags: %d\n", rc);
574 LPROC_SEQ_FOPS(ll_checksum);
576 static int ll_rd_track_id(struct seq_file *m, enum stats_track_type type)
578 struct super_block *sb = m->private;
580 if (ll_s2sbi(sb)->ll_stats_track_type == type) {
581 seq_printf(m, "%d\n",
582 ll_s2sbi(sb)->ll_stats_track_id);
583 } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) {
584 seq_puts(m, "0 (all)\n");
586 seq_puts(m, "untracked\n");
591 static int ll_wr_track_id(const char __user *buffer, unsigned long count,
592 void *data, enum stats_track_type type)
594 struct super_block *sb = data;
597 rc = lprocfs_write_helper(buffer, count, &pid);
600 ll_s2sbi(sb)->ll_stats_track_id = pid;
602 ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL;
604 ll_s2sbi(sb)->ll_stats_track_type = type;
605 lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats);
609 static int ll_track_pid_seq_show(struct seq_file *m, void *v)
611 return ll_rd_track_id(m, STATS_TRACK_PID);
614 static ssize_t ll_track_pid_seq_write(struct file *file,
615 const char __user *buffer,
616 size_t count, loff_t *off)
618 struct seq_file *seq = file->private_data;
619 return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PID);
621 LPROC_SEQ_FOPS(ll_track_pid);
623 static int ll_track_ppid_seq_show(struct seq_file *m, void *v)
625 return ll_rd_track_id(m, STATS_TRACK_PPID);
628 static ssize_t ll_track_ppid_seq_write(struct file *file,
629 const char __user *buffer,
630 size_t count, loff_t *off)
632 struct seq_file *seq = file->private_data;
633 return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PPID);
635 LPROC_SEQ_FOPS(ll_track_ppid);
637 static int ll_track_gid_seq_show(struct seq_file *m, void *v)
639 return ll_rd_track_id(m, STATS_TRACK_GID);
642 static ssize_t ll_track_gid_seq_write(struct file *file,
643 const char __user *buffer,
644 size_t count, loff_t *off)
646 struct seq_file *seq = file->private_data;
647 return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_GID);
649 LPROC_SEQ_FOPS(ll_track_gid);
651 static int ll_statahead_max_seq_show(struct seq_file *m, void *v)
653 struct super_block *sb = m->private;
654 struct ll_sb_info *sbi = ll_s2sbi(sb);
656 seq_printf(m, "%u\n", sbi->ll_sa_max);
660 static ssize_t ll_statahead_max_seq_write(struct file *file,
661 const char __user *buffer,
662 size_t count, loff_t *off)
664 struct seq_file *m = file->private_data;
665 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
668 rc = lprocfs_write_helper(buffer, count, &val);
672 if (val >= 0 && val <= LL_SA_RPC_MAX)
673 sbi->ll_sa_max = val;
675 CERROR("Bad statahead_max value %d. Valid values are in the "
676 "range [0, %d]\n", val, LL_SA_RPC_MAX);
680 LPROC_SEQ_FOPS(ll_statahead_max);
682 static int ll_statahead_agl_seq_show(struct seq_file *m, void *v)
684 struct super_block *sb = m->private;
685 struct ll_sb_info *sbi = ll_s2sbi(sb);
687 seq_printf(m, "%u\n",
688 sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0);
692 static ssize_t ll_statahead_agl_seq_write(struct file *file,
693 const char __user *buffer,
694 size_t count, loff_t *off)
696 struct seq_file *m = file->private_data;
697 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
700 rc = lprocfs_write_helper(buffer, count, &val);
705 sbi->ll_flags |= LL_SBI_AGL_ENABLED;
707 sbi->ll_flags &= ~LL_SBI_AGL_ENABLED;
711 LPROC_SEQ_FOPS(ll_statahead_agl);
713 static int ll_statahead_stats_seq_show(struct seq_file *m, void *v)
715 struct super_block *sb = m->private;
716 struct ll_sb_info *sbi = ll_s2sbi(sb);
718 seq_printf(m, "statahead total: %u\n"
719 "statahead wrong: %u\n"
721 atomic_read(&sbi->ll_sa_total),
722 atomic_read(&sbi->ll_sa_wrong),
723 atomic_read(&sbi->ll_agl_total));
726 LPROC_SEQ_FOPS_RO(ll_statahead_stats);
728 static int ll_lazystatfs_seq_show(struct seq_file *m, void *v)
730 struct super_block *sb = m->private;
731 struct ll_sb_info *sbi = ll_s2sbi(sb);
733 seq_printf(m, "%u\n",
734 (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0);
738 static ssize_t ll_lazystatfs_seq_write(struct file *file,
739 const char __user *buffer,
740 size_t count, loff_t *off)
742 struct seq_file *m = file->private_data;
743 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private);
746 rc = lprocfs_write_helper(buffer, count, &val);
751 sbi->ll_flags |= LL_SBI_LAZYSTATFS;
753 sbi->ll_flags &= ~LL_SBI_LAZYSTATFS;
757 LPROC_SEQ_FOPS(ll_lazystatfs);
759 static int ll_max_easize_seq_show(struct seq_file *m, void *v)
761 struct super_block *sb = m->private;
762 struct ll_sb_info *sbi = ll_s2sbi(sb);
766 rc = ll_get_max_mdsize(sbi, &ealen);
770 seq_printf(m, "%u\n", ealen);
773 LPROC_SEQ_FOPS_RO(ll_max_easize);
776 * Get default_easize.
778 * \see client_obd::cl_default_mds_easize
780 * \param[in] m seq_file handle
781 * \param[in] v unused for single entry
783 * \retval 0 on success
784 * \retval negative negated errno on failure
786 static int ll_default_easize_seq_show(struct seq_file *m, void *v)
788 struct super_block *sb = m->private;
789 struct ll_sb_info *sbi = ll_s2sbi(sb);
793 rc = ll_get_default_mdsize(sbi, &ealen);
797 seq_printf(m, "%u\n", ealen);
802 * Set default_easize.
804 * Range checking on the passed value is handled by
805 * ll_set_default_mdsize().
807 * \see client_obd::cl_default_mds_easize
809 * \param[in] file proc file
810 * \param[in] buffer string passed from user space
811 * \param[in] count \a buffer length
812 * \param[in] off unused for single entry
814 * \retval positive \a count on success
815 * \retval negative negated errno on failure
817 static ssize_t ll_default_easize_seq_write(struct file *file,
818 const char __user *buffer,
819 size_t count, loff_t *unused)
821 struct seq_file *seq = file->private_data;
822 struct super_block *sb = (struct super_block *)seq->private;
823 struct ll_sb_info *sbi = ll_s2sbi(sb);
830 rc = lprocfs_write_helper(buffer, count, &val);
834 rc = ll_set_default_mdsize(sbi, val);
840 LPROC_SEQ_FOPS(ll_default_easize);
842 static int ll_sbi_flags_seq_show(struct seq_file *m, void *v)
844 const char *str[] = LL_SBI_FLAGS;
845 struct super_block *sb = m->private;
846 int flags = ll_s2sbi(sb)->ll_flags;
850 if (ARRAY_SIZE(str) <= i) {
851 CERROR("%s: Revise array LL_SBI_FLAGS to match sbi "
852 "flags please.\n", ll_get_fsname(sb, NULL, 0));
857 seq_printf(m, "%s ", str[i]);
861 seq_printf(m, "\b\n");
864 LPROC_SEQ_FOPS_RO(ll_sbi_flags);
866 static int ll_unstable_stats_seq_show(struct seq_file *m, void *v)
868 struct super_block *sb = m->private;
869 struct ll_sb_info *sbi = ll_s2sbi(sb);
870 struct cl_client_cache *cache = sbi->ll_cache;
874 pages = atomic_long_read(&cache->ccc_unstable_nr);
875 mb = (pages * PAGE_CACHE_SIZE) >> 20;
877 seq_printf(m, "unstable_check: %8d\n"
878 "unstable_pages: %12ld\n"
879 "unstable_mb: %8d\n",
880 cache->ccc_unstable_check, pages, mb);
884 static ssize_t ll_unstable_stats_seq_write(struct file *file,
885 const char __user *buffer,
886 size_t count, loff_t *unused)
888 struct seq_file *seq = file->private_data;
889 struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)seq->private);
895 if (count >= sizeof(kernbuf))
898 if (copy_from_user(kernbuf, buffer, count))
902 buffer += lprocfs_find_named_value(kernbuf, "unstable_check:", &count) -
904 rc = lprocfs_write_helper(buffer, count, &val);
908 /* borrow lru lock to set the value */
909 spin_lock(&sbi->ll_cache->ccc_lru_lock);
910 sbi->ll_cache->ccc_unstable_check = !!val;
911 spin_unlock(&sbi->ll_cache->ccc_lru_lock);
915 LPROC_SEQ_FOPS(ll_unstable_stats);
917 static int ll_root_squash_seq_show(struct seq_file *m, void *v)
919 struct super_block *sb = m->private;
920 struct ll_sb_info *sbi = ll_s2sbi(sb);
921 struct root_squash_info *squash = &sbi->ll_squash;
923 seq_printf(m, "%u:%u\n", squash->rsi_uid, squash->rsi_gid);
927 static ssize_t ll_root_squash_seq_write(struct file *file,
928 const char __user *buffer,
929 size_t count, loff_t *off)
931 struct seq_file *m = file->private_data;
932 struct super_block *sb = m->private;
933 struct ll_sb_info *sbi = ll_s2sbi(sb);
934 struct root_squash_info *squash = &sbi->ll_squash;
936 return lprocfs_wr_root_squash(buffer, count, squash,
937 ll_get_fsname(sb, NULL, 0));
939 LPROC_SEQ_FOPS(ll_root_squash);
941 static int ll_nosquash_nids_seq_show(struct seq_file *m, void *v)
943 struct super_block *sb = m->private;
944 struct ll_sb_info *sbi = ll_s2sbi(sb);
945 struct root_squash_info *squash = &sbi->ll_squash;
948 down_read(&squash->rsi_sem);
949 if (!list_empty(&squash->rsi_nosquash_nids)) {
950 len = cfs_print_nidlist(m->buf + m->count, m->size - m->count,
951 &squash->rsi_nosquash_nids);
955 seq_puts(m, "NONE\n");
957 up_read(&squash->rsi_sem);
962 static ssize_t ll_nosquash_nids_seq_write(struct file *file,
963 const char __user *buffer,
964 size_t count, loff_t *off)
966 struct seq_file *m = file->private_data;
967 struct super_block *sb = m->private;
968 struct ll_sb_info *sbi = ll_s2sbi(sb);
969 struct root_squash_info *squash = &sbi->ll_squash;
972 rc = lprocfs_wr_nosquash_nids(buffer, count, squash,
973 ll_get_fsname(sb, NULL, 0));
977 ll_compute_rootsquash_state(sbi);
981 LPROC_SEQ_FOPS(ll_nosquash_nids);
983 struct lprocfs_vars lprocfs_llite_obd_vars[] = {
985 .fops = &ll_sb_uuid_fops },
987 .fops = &ll_fstype_fops },
989 .fops = &ll_site_stats_fops },
990 { .name = "blocksize",
991 .fops = &ll_blksize_fops },
992 { .name = "kbytestotal",
993 .fops = &ll_kbytestotal_fops },
994 { .name = "kbytesfree",
995 .fops = &ll_kbytesfree_fops },
996 { .name = "kbytesavail",
997 .fops = &ll_kbytesavail_fops },
998 { .name = "filestotal",
999 .fops = &ll_filestotal_fops },
1000 { .name = "filesfree",
1001 .fops = &ll_filesfree_fops },
1002 { .name = "client_type",
1003 .fops = &ll_client_type_fops },
1004 { .name = "max_read_ahead_mb",
1005 .fops = &ll_max_readahead_mb_fops },
1006 { .name = "max_read_ahead_per_file_mb",
1007 .fops = &ll_max_readahead_per_file_mb_fops },
1008 { .name = "max_read_ahead_whole_mb",
1009 .fops = &ll_max_read_ahead_whole_mb_fops },
1010 { .name = "max_cached_mb",
1011 .fops = &ll_max_cached_mb_fops },
1012 { .name = "checksum_pages",
1013 .fops = &ll_checksum_fops },
1014 { .name = "stats_track_pid",
1015 .fops = &ll_track_pid_fops },
1016 { .name = "stats_track_ppid",
1017 .fops = &ll_track_ppid_fops },
1018 { .name = "stats_track_gid",
1019 .fops = &ll_track_gid_fops },
1020 { .name = "statahead_max",
1021 .fops = &ll_statahead_max_fops },
1022 { .name = "statahead_agl",
1023 .fops = &ll_statahead_agl_fops },
1024 { .name = "statahead_stats",
1025 .fops = &ll_statahead_stats_fops },
1026 { .name = "lazystatfs",
1027 .fops = &ll_lazystatfs_fops },
1028 { .name = "max_easize",
1029 .fops = &ll_max_easize_fops },
1030 { .name = "default_easize",
1031 .fops = &ll_default_easize_fops },
1032 { .name = "sbi_flags",
1033 .fops = &ll_sbi_flags_fops },
1034 { .name = "xattr_cache",
1035 .fops = &ll_xattr_cache_fops },
1036 { .name = "unstable_stats",
1037 .fops = &ll_unstable_stats_fops },
1038 { .name = "root_squash",
1039 .fops = &ll_root_squash_fops },
1040 { .name = "nosquash_nids",
1041 .fops = &ll_nosquash_nids_fops },
1045 #define MAX_STRING_SIZE 128
1047 static const struct llite_file_opcode {
1051 } llite_opcode_table[LPROC_LL_FILE_OPCODES] = {
1052 /* file operation */
1053 { LPROC_LL_DIRTY_HITS, LPROCFS_TYPE_REGS, "dirty_pages_hits" },
1054 { LPROC_LL_DIRTY_MISSES, LPROCFS_TYPE_REGS, "dirty_pages_misses" },
1055 { LPROC_LL_READ_BYTES, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
1057 { LPROC_LL_WRITE_BYTES, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES,
1059 { LPROC_LL_BRW_READ, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
1061 { LPROC_LL_BRW_WRITE, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES,
1063 { LPROC_LL_IOCTL, LPROCFS_TYPE_REGS, "ioctl" },
1064 { LPROC_LL_OPEN, LPROCFS_TYPE_REGS, "open" },
1065 { LPROC_LL_RELEASE, LPROCFS_TYPE_REGS, "close" },
1066 { LPROC_LL_MAP, LPROCFS_TYPE_REGS, "mmap" },
1067 { LPROC_LL_LLSEEK, LPROCFS_TYPE_REGS, "seek" },
1068 { LPROC_LL_FSYNC, LPROCFS_TYPE_REGS, "fsync" },
1069 { LPROC_LL_READDIR, LPROCFS_TYPE_REGS, "readdir" },
1070 /* inode operation */
1071 { LPROC_LL_SETATTR, LPROCFS_TYPE_REGS, "setattr" },
1072 { LPROC_LL_TRUNC, LPROCFS_TYPE_REGS, "truncate" },
1073 { LPROC_LL_FLOCK, LPROCFS_TYPE_REGS, "flock" },
1074 { LPROC_LL_GETATTR, LPROCFS_TYPE_REGS, "getattr" },
1075 /* dir inode operation */
1076 { LPROC_LL_CREATE, LPROCFS_TYPE_REGS, "create" },
1077 { LPROC_LL_LINK, LPROCFS_TYPE_REGS, "link" },
1078 { LPROC_LL_UNLINK, LPROCFS_TYPE_REGS, "unlink" },
1079 { LPROC_LL_SYMLINK, LPROCFS_TYPE_REGS, "symlink" },
1080 { LPROC_LL_MKDIR, LPROCFS_TYPE_REGS, "mkdir" },
1081 { LPROC_LL_RMDIR, LPROCFS_TYPE_REGS, "rmdir" },
1082 { LPROC_LL_MKNOD, LPROCFS_TYPE_REGS, "mknod" },
1083 { LPROC_LL_RENAME, LPROCFS_TYPE_REGS, "rename" },
1084 /* special inode operation */
1085 { LPROC_LL_STAFS, LPROCFS_TYPE_REGS, "statfs" },
1086 { LPROC_LL_ALLOC_INODE, LPROCFS_TYPE_REGS, "alloc_inode" },
1087 { LPROC_LL_SETXATTR, LPROCFS_TYPE_REGS, "setxattr" },
1088 { LPROC_LL_GETXATTR, LPROCFS_TYPE_REGS, "getxattr" },
1089 { LPROC_LL_GETXATTR_HITS, LPROCFS_TYPE_REGS, "getxattr_hits" },
1090 { LPROC_LL_LISTXATTR, LPROCFS_TYPE_REGS, "listxattr" },
1091 { LPROC_LL_REMOVEXATTR, LPROCFS_TYPE_REGS, "removexattr" },
1092 { LPROC_LL_INODE_PERM, LPROCFS_TYPE_REGS, "inode_permission" },
1095 void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count)
1099 if (sbi->ll_stats_track_type == STATS_TRACK_ALL)
1100 lprocfs_counter_add(sbi->ll_stats, op, count);
1101 else if (sbi->ll_stats_track_type == STATS_TRACK_PID &&
1102 sbi->ll_stats_track_id == current->pid)
1103 lprocfs_counter_add(sbi->ll_stats, op, count);
1104 else if (sbi->ll_stats_track_type == STATS_TRACK_PPID &&
1105 sbi->ll_stats_track_id == current->parent->pid)
1106 lprocfs_counter_add(sbi->ll_stats, op, count);
1107 else if (sbi->ll_stats_track_type == STATS_TRACK_GID &&
1108 sbi->ll_stats_track_id ==
1109 from_kgid(&init_user_ns, current_gid()))
1110 lprocfs_counter_add(sbi->ll_stats, op, count);
1112 EXPORT_SYMBOL(ll_stats_ops_tally);
1114 static const char *ra_stat_string[] = {
1115 [RA_STAT_HIT] = "hits",
1116 [RA_STAT_MISS] = "misses",
1117 [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive",
1118 [RA_STAT_MISS_IN_WINDOW] = "miss inside window",
1119 [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page",
1120 [RA_STAT_FAILED_MATCH] = "failed lock match",
1121 [RA_STAT_DISCARDED] = "read but discarded",
1122 [RA_STAT_ZERO_LEN] = "zero length file",
1123 [RA_STAT_ZERO_WINDOW] = "zero size window",
1124 [RA_STAT_EOF] = "read-ahead to EOF",
1125 [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue",
1126 [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page",
1127 [RA_STAT_FAILED_REACH_END] = "failed to reach end"
1130 LPROC_SEQ_FOPS_RO_TYPE(llite, name);
1131 LPROC_SEQ_FOPS_RO_TYPE(llite, uuid);
1133 int lprocfs_register_mountpoint(struct proc_dir_entry *parent,
1134 struct super_block *sb, char *osc, char *mdc)
1136 struct lprocfs_vars lvars[2];
1137 struct lustre_sb_info *lsi = s2lsi(sb);
1138 struct ll_sb_info *sbi = ll_s2sbi(sb);
1139 struct obd_device *obd;
1140 struct proc_dir_entry *dir;
1141 char name[MAX_STRING_SIZE + 1], *ptr;
1142 int err, id, len, rc;
1145 memset(lvars, 0, sizeof(lvars));
1147 name[MAX_STRING_SIZE] = '\0';
1148 lvars[0].name = name;
1150 LASSERT(sbi != NULL);
1151 LASSERT(mdc != NULL);
1152 LASSERT(osc != NULL);
1155 len = strlen(lsi->lsi_lmd->lmd_profile);
1156 ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-');
1157 if (ptr && (strcmp(ptr, "-client") == 0))
1161 snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len,
1162 lsi->lsi_lmd->lmd_profile, sb);
1164 sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL);
1165 if (IS_ERR(sbi->ll_proc_root)) {
1166 err = PTR_ERR(sbi->ll_proc_root);
1167 sbi->ll_proc_root = NULL;
1171 rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444,
1172 &vvp_dump_pgcache_file_ops, sbi);
1174 CWARN("Error adding the dump_page_cache file\n");
1176 rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644,
1177 &ll_rw_extents_stats_fops, sbi);
1179 CWARN("Error adding the extent_stats file\n");
1181 rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process",
1182 0644, &ll_rw_extents_stats_pp_fops, sbi);
1184 CWARN("Error adding the extents_stats_per_process file\n");
1186 rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644,
1187 &ll_rw_offset_stats_fops, sbi);
1189 CWARN("Error adding the offset_stats file\n");
1191 /* File operations stats */
1192 sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES,
1193 LPROCFS_STATS_FLAG_NONE);
1194 if (sbi->ll_stats == NULL)
1195 GOTO(out, err = -ENOMEM);
1196 /* do counter init */
1197 for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) {
1198 __u32 type = llite_opcode_table[id].type;
1200 if (type & LPROCFS_TYPE_REGS)
1202 else if (type & LPROCFS_TYPE_BYTES)
1204 else if (type & LPROCFS_TYPE_PAGES)
1206 lprocfs_counter_init(sbi->ll_stats,
1207 llite_opcode_table[id].opcode,
1208 (type & LPROCFS_CNTR_AVGMINMAX),
1209 llite_opcode_table[id].opname, ptr);
1211 err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats);
1215 sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string),
1216 LPROCFS_STATS_FLAG_NONE);
1217 if (sbi->ll_ra_stats == NULL)
1218 GOTO(out, err = -ENOMEM);
1220 for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++)
1221 lprocfs_counter_init(sbi->ll_ra_stats, id, 0,
1222 ra_stat_string[id], "pages");
1223 err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats",
1229 err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb);
1234 obd = class_name2obd(mdc);
1236 LASSERT(obd != NULL);
1237 LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1238 LASSERT(obd->obd_type->typ_name != NULL);
1240 dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1242 GOTO(out, err = -ENOMEM);
1244 snprintf(name, MAX_STRING_SIZE, "common_name");
1245 lvars[0].fops = &llite_name_fops;
1246 err = lprocfs_add_vars(dir, lvars, obd);
1250 snprintf(name, MAX_STRING_SIZE, "uuid");
1251 lvars[0].fops = &llite_uuid_fops;
1252 err = lprocfs_add_vars(dir, lvars, obd);
1257 obd = class_name2obd(osc);
1259 LASSERT(obd != NULL);
1260 LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1261 LASSERT(obd->obd_type->typ_name != NULL);
1263 dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root);
1265 GOTO(out, err = -ENOMEM);
1267 snprintf(name, MAX_STRING_SIZE, "common_name");
1268 lvars[0].fops = &llite_name_fops;
1269 err = lprocfs_add_vars(dir, lvars, obd);
1273 snprintf(name, MAX_STRING_SIZE, "uuid");
1274 lvars[0].fops = &llite_uuid_fops;
1275 err = lprocfs_add_vars(dir, lvars, obd);
1278 lprocfs_remove(&sbi->ll_proc_root);
1279 lprocfs_free_stats(&sbi->ll_ra_stats);
1280 lprocfs_free_stats(&sbi->ll_stats);
1285 void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi)
1287 if (sbi->ll_proc_root) {
1288 lprocfs_remove(&sbi->ll_proc_root);
1289 lprocfs_free_stats(&sbi->ll_ra_stats);
1290 lprocfs_free_stats(&sbi->ll_stats);
1293 #undef MAX_STRING_SIZE
1295 #define pct(a,b) (b ? a * 100 / b : 0)
1297 static void ll_display_extents_info(struct ll_rw_extents_info *io_extents,
1298 struct seq_file *seq, int which)
1300 unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum;
1301 unsigned long start, end, r, w;
1302 char *unitp = "KMGTPEZY";
1304 struct per_process_info *pp_info = &io_extents->pp_extents[which];
1310 for(i = 0; i < LL_HIST_MAX; i++) {
1311 read_tot += pp_info->pp_r_hist.oh_buckets[i];
1312 write_tot += pp_info->pp_w_hist.oh_buckets[i];
1315 for(i = 0; i < LL_HIST_MAX; i++) {
1316 r = pp_info->pp_r_hist.oh_buckets[i];
1317 w = pp_info->pp_w_hist.oh_buckets[i];
1320 end = 1 << (i + LL_HIST_START - units);
1321 seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu | "
1322 "%14lu %4lu %4lu\n", start, *unitp, end, *unitp,
1323 (i == LL_HIST_MAX - 1) ? '+' : ' ',
1324 r, pct(r, read_tot), pct(read_cum, read_tot),
1325 w, pct(w, write_tot), pct(write_cum, write_tot));
1327 if (start == 1<<10) {
1332 if (read_cum == read_tot && write_cum == write_tot)
1337 static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v)
1340 struct ll_sb_info *sbi = seq->private;
1341 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1344 do_gettimeofday(&now);
1346 if (!sbi->ll_rw_stats_on) {
1347 seq_puts(seq, "disabled\n write anything in this file to activate, then 0 or \[D/d]isabled\" to deactivate\n");
1350 seq_printf(seq, "snapshot_time: %lu.%lu (secs.usecs)\n",
1351 now.tv_sec, now.tv_usec);
1352 seq_printf(seq, "%15s %19s | %20s\n", " ", "read", "write");
1353 seq_printf(seq, "%13s %14s %4s %4s | %14s %4s %4s\n",
1354 "extents", "calls", "%", "cum%",
1355 "calls", "%", "cum%");
1356 spin_lock(&sbi->ll_pp_extent_lock);
1357 for (k = 0; k < LL_PROCESS_HIST_MAX; k++) {
1358 if (io_extents->pp_extents[k].pid != 0) {
1359 seq_printf(seq, "\nPID: %d\n",
1360 io_extents->pp_extents[k].pid);
1361 ll_display_extents_info(io_extents, seq, k);
1364 spin_unlock(&sbi->ll_pp_extent_lock);
1368 static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file,
1369 const char __user *buf,
1373 struct seq_file *seq = file->private_data;
1374 struct ll_sb_info *sbi = seq->private;
1375 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1377 int value = 1, rc = 0;
1382 rc = lprocfs_write_helper(buf, len, &value);
1383 if (rc < 0 && len < 16) {
1386 if (copy_from_user(kernbuf, buf, len))
1390 if (kernbuf[len - 1] == '\n')
1391 kernbuf[len - 1] = 0;
1393 if (strcmp(kernbuf, "disabled") == 0 ||
1394 strcmp(kernbuf, "Disabled") == 0)
1399 sbi->ll_rw_stats_on = 0;
1401 sbi->ll_rw_stats_on = 1;
1403 spin_lock(&sbi->ll_pp_extent_lock);
1404 for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1405 io_extents->pp_extents[i].pid = 0;
1406 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1407 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1409 spin_unlock(&sbi->ll_pp_extent_lock);
1413 LPROC_SEQ_FOPS(ll_rw_extents_stats_pp);
1415 static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v)
1418 struct ll_sb_info *sbi = seq->private;
1419 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1421 do_gettimeofday(&now);
1423 if (!sbi->ll_rw_stats_on) {
1424 seq_puts(seq, "disabled\n write anything in this file to activate, then 0 or \"[D/d]isabled\" to deactivate\n");
1427 seq_printf(seq, "snapshot_time: %lu.%lu (secs.usecs)\n",
1428 now.tv_sec, now.tv_usec);
1430 seq_printf(seq, "%15s %19s | %20s\n", " ", "read", "write");
1431 seq_printf(seq, "%13s %14s %4s %4s | %14s %4s %4s\n",
1432 "extents", "calls", "%", "cum%",
1433 "calls", "%", "cum%");
1434 spin_lock(&sbi->ll_lock);
1435 ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX);
1436 spin_unlock(&sbi->ll_lock);
1441 static ssize_t ll_rw_extents_stats_seq_write(struct file *file,
1442 const char __user *buf,
1443 size_t len, loff_t *off)
1445 struct seq_file *seq = file->private_data;
1446 struct ll_sb_info *sbi = seq->private;
1447 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1449 int value = 1, rc = 0;
1454 rc = lprocfs_write_helper(buf, len, &value);
1455 if (rc < 0 && len < 16) {
1458 if (copy_from_user(kernbuf, buf, len))
1462 if (kernbuf[len - 1] == '\n')
1463 kernbuf[len - 1] = 0;
1465 if (strcmp(kernbuf, "disabled") == 0 ||
1466 strcmp(kernbuf, "Disabled") == 0)
1471 sbi->ll_rw_stats_on = 0;
1473 sbi->ll_rw_stats_on = 1;
1475 spin_lock(&sbi->ll_pp_extent_lock);
1476 for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
1477 io_extents->pp_extents[i].pid = 0;
1478 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist);
1479 lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist);
1481 spin_unlock(&sbi->ll_pp_extent_lock);
1485 LPROC_SEQ_FOPS(ll_rw_extents_stats);
1487 void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid,
1488 struct ll_file_data *file, loff_t pos,
1489 size_t count, int rw)
1492 struct ll_rw_process_info *process;
1493 struct ll_rw_process_info *offset;
1494 int *off_count = &sbi->ll_rw_offset_entry_count;
1495 int *process_count = &sbi->ll_offset_process_count;
1496 struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info;
1498 if(!sbi->ll_rw_stats_on)
1500 process = sbi->ll_rw_process_info;
1501 offset = sbi->ll_rw_offset_info;
1503 spin_lock(&sbi->ll_pp_extent_lock);
1504 /* Extent statistics */
1505 for(i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1506 if(io_extents->pp_extents[i].pid == pid) {
1514 sbi->ll_extent_process_count =
1515 (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX;
1516 cur = sbi->ll_extent_process_count;
1517 io_extents->pp_extents[cur].pid = pid;
1518 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist);
1519 lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist);
1522 for(i = 0; (count >= (1 << LL_HIST_START << i)) &&
1523 (i < (LL_HIST_MAX - 1)); i++);
1525 io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++;
1526 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++;
1528 io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++;
1529 io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++;
1531 spin_unlock(&sbi->ll_pp_extent_lock);
1533 spin_lock(&sbi->ll_process_lock);
1534 /* Offset statistics */
1535 for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1536 if (process[i].rw_pid == pid) {
1537 if (process[i].rw_last_file != file) {
1538 process[i].rw_range_start = pos;
1539 process[i].rw_last_file_pos = pos + count;
1540 process[i].rw_smallest_extent = count;
1541 process[i].rw_largest_extent = count;
1542 process[i].rw_offset = 0;
1543 process[i].rw_last_file = file;
1544 spin_unlock(&sbi->ll_process_lock);
1547 if (process[i].rw_last_file_pos != pos) {
1549 (*off_count + 1) % LL_OFFSET_HIST_MAX;
1550 offset[*off_count].rw_op = process[i].rw_op;
1551 offset[*off_count].rw_pid = pid;
1552 offset[*off_count].rw_range_start =
1553 process[i].rw_range_start;
1554 offset[*off_count].rw_range_end =
1555 process[i].rw_last_file_pos;
1556 offset[*off_count].rw_smallest_extent =
1557 process[i].rw_smallest_extent;
1558 offset[*off_count].rw_largest_extent =
1559 process[i].rw_largest_extent;
1560 offset[*off_count].rw_offset =
1561 process[i].rw_offset;
1562 process[i].rw_op = rw;
1563 process[i].rw_range_start = pos;
1564 process[i].rw_smallest_extent = count;
1565 process[i].rw_largest_extent = count;
1566 process[i].rw_offset = pos -
1567 process[i].rw_last_file_pos;
1569 if(process[i].rw_smallest_extent > count)
1570 process[i].rw_smallest_extent = count;
1571 if(process[i].rw_largest_extent < count)
1572 process[i].rw_largest_extent = count;
1573 process[i].rw_last_file_pos = pos + count;
1574 spin_unlock(&sbi->ll_process_lock);
1578 *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX;
1579 process[*process_count].rw_pid = pid;
1580 process[*process_count].rw_op = rw;
1581 process[*process_count].rw_range_start = pos;
1582 process[*process_count].rw_last_file_pos = pos + count;
1583 process[*process_count].rw_smallest_extent = count;
1584 process[*process_count].rw_largest_extent = count;
1585 process[*process_count].rw_offset = 0;
1586 process[*process_count].rw_last_file = file;
1587 spin_unlock(&sbi->ll_process_lock);
1590 static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v)
1593 struct ll_sb_info *sbi = seq->private;
1594 struct ll_rw_process_info *offset = sbi->ll_rw_offset_info;
1595 struct ll_rw_process_info *process = sbi->ll_rw_process_info;
1598 do_gettimeofday(&now);
1600 if (!sbi->ll_rw_stats_on) {
1601 seq_puts(seq, "disabled\n write anything in this file to activate, then 0 or \"[D/d]isabled\" to deactivate\n");
1604 spin_lock(&sbi->ll_process_lock);
1606 seq_printf(seq, "snapshot_time: %lu.%lu (secs.usecs)\n",
1607 now.tv_sec, now.tv_usec);
1608 seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n",
1609 "R/W", "PID", "RANGE START", "RANGE END",
1610 "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET");
1612 /* We stored the discontiguous offsets here; print them first */
1613 for (i = 0; i < LL_OFFSET_HIST_MAX; i++) {
1614 if (offset[i].rw_pid != 0)
1616 "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1617 offset[i].rw_op == READ ? 'R' : 'W',
1619 offset[i].rw_range_start,
1620 offset[i].rw_range_end,
1621 (unsigned long)offset[i].rw_smallest_extent,
1622 (unsigned long)offset[i].rw_largest_extent,
1623 offset[i].rw_offset);
1626 /* Then print the current offsets for each process */
1627 for (i = 0; i < LL_PROCESS_HIST_MAX; i++) {
1628 if (process[i].rw_pid != 0)
1630 "%3c %10d %14Lu %14Lu %17lu %17lu %14Lu",
1631 process[i].rw_op == READ ? 'R' : 'W',
1633 process[i].rw_range_start,
1634 process[i].rw_last_file_pos,
1635 (unsigned long)process[i].rw_smallest_extent,
1636 (unsigned long)process[i].rw_largest_extent,
1637 process[i].rw_offset);
1639 spin_unlock(&sbi->ll_process_lock);
1644 static ssize_t ll_rw_offset_stats_seq_write(struct file *file,
1645 const char __user *buf,
1646 size_t len, loff_t *off)
1648 struct seq_file *seq = file->private_data;
1649 struct ll_sb_info *sbi = seq->private;
1650 struct ll_rw_process_info *process_info = sbi->ll_rw_process_info;
1651 struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info;
1652 int value = 1, rc = 0;
1657 rc = lprocfs_write_helper(buf, len, &value);
1659 if (rc < 0 && len < 16) {
1662 if (copy_from_user(kernbuf, buf, len))
1666 if (kernbuf[len - 1] == '\n')
1667 kernbuf[len - 1] = 0;
1669 if (strcmp(kernbuf, "disabled") == 0 ||
1670 strcmp(kernbuf, "Disabled") == 0)
1675 sbi->ll_rw_stats_on = 0;
1677 sbi->ll_rw_stats_on = 1;
1679 spin_lock(&sbi->ll_process_lock);
1680 sbi->ll_offset_process_count = 0;
1681 sbi->ll_rw_offset_entry_count = 0;
1682 memset(process_info, 0, sizeof(struct ll_rw_process_info) *
1683 LL_PROCESS_HIST_MAX);
1684 memset(offset_info, 0, sizeof(struct ll_rw_process_info) *
1685 LL_OFFSET_HIST_MAX);
1686 spin_unlock(&sbi->ll_process_lock);
1691 LPROC_SEQ_FOPS(ll_rw_offset_stats);
1692 #endif /* CONFIG_PROC_FS */