4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/obdclass/lprocfs_status.c
34 * Author: Hariharan Thantry <thantry@users.sourceforge.net>
37 #define DEBUG_SUBSYSTEM S_CLASS
39 #include <obd_class.h>
40 #include <lprocfs_status.h>
41 #include <lustre/lustre_idl.h>
45 static int lprocfs_no_percpu_stats = 0;
46 module_param(lprocfs_no_percpu_stats, int, 0644);
47 MODULE_PARM_DESC(lprocfs_no_percpu_stats, "Do not alloc percpu data for lprocfs stats");
49 #define MAX_STRING_SIZE 128
51 int lprocfs_single_release(struct inode *inode, struct file *file)
53 return single_release(inode, file);
55 EXPORT_SYMBOL(lprocfs_single_release);
57 int lprocfs_seq_release(struct inode *inode, struct file *file)
59 return seq_release(inode, file);
61 EXPORT_SYMBOL(lprocfs_seq_release);
63 struct proc_dir_entry *
64 lprocfs_add_simple(struct proc_dir_entry *root, char *name,
65 void *data, const struct file_operations *fops)
67 struct proc_dir_entry *proc;
70 if (root == NULL || name == NULL || fops == NULL)
71 return ERR_PTR(-EINVAL);
77 proc = proc_create_data(name, mode, root, fops, data);
79 CERROR("LprocFS: No memory to create /proc entry %s\n",
81 return ERR_PTR(-ENOMEM);
85 EXPORT_SYMBOL(lprocfs_add_simple);
87 struct proc_dir_entry *lprocfs_add_symlink(const char *name,
88 struct proc_dir_entry *parent, const char *format, ...)
90 struct proc_dir_entry *entry;
94 if (parent == NULL || format == NULL)
97 OBD_ALLOC_WAIT(dest, MAX_STRING_SIZE + 1);
101 va_start(ap, format);
102 vsnprintf(dest, MAX_STRING_SIZE, format, ap);
105 entry = proc_symlink(name, parent, dest);
107 CERROR("LprocFS: Could not create symbolic link from "
108 "%s to %s\n", name, dest);
110 OBD_FREE(dest, MAX_STRING_SIZE + 1);
113 EXPORT_SYMBOL(lprocfs_add_symlink);
115 static const struct file_operations lprocfs_generic_fops = { };
117 int ldebugfs_add_vars(struct dentry *parent, struct lprocfs_vars *list,
120 if (IS_ERR_OR_NULL(parent) || IS_ERR_OR_NULL(list))
124 struct dentry *entry;
127 if (list->proc_mode != 0000) {
128 mode = list->proc_mode;
129 } else if (list->fops) {
130 if (list->fops->read)
132 if (list->fops->write)
135 entry = debugfs_create_file(list->name, mode, parent,
137 list->fops ? : &lprocfs_generic_fops);
138 if (IS_ERR_OR_NULL(entry))
139 return entry ? PTR_ERR(entry) : -ENOMEM;
144 EXPORT_SYMBOL_GPL(ldebugfs_add_vars);
149 * \param root [in] The parent proc entry on which new entry will be added.
150 * \param list [in] Array of proc entries to be added.
151 * \param data [in] The argument to be passed when entries read/write routines
152 * are called through /proc file.
154 * \retval 0 on success
158 lprocfs_add_vars(struct proc_dir_entry *root, struct lprocfs_vars *list,
161 if (root == NULL || list == NULL)
164 while (list->name != NULL) {
165 struct proc_dir_entry *proc;
168 if (list->proc_mode != 0000) {
169 mode = list->proc_mode;
170 } else if (list->fops) {
171 if (list->fops->read)
173 if (list->fops->write)
176 proc = proc_create_data(list->name, mode, root,
177 list->fops ?: &lprocfs_generic_fops,
185 EXPORT_SYMBOL(lprocfs_add_vars);
187 void ldebugfs_remove(struct dentry **entryp)
189 debugfs_remove(*entryp);
192 EXPORT_SYMBOL_GPL(ldebugfs_remove);
194 #ifndef HAVE_REMOVE_PROC_SUBTREE
195 /* for b=10866, global variable */
196 DECLARE_RWSEM(_lprocfs_lock);
197 EXPORT_SYMBOL(_lprocfs_lock);
199 static void lprocfs_remove_nolock(struct proc_dir_entry **proot)
201 struct proc_dir_entry *root = *proot;
202 struct proc_dir_entry *temp = root;
203 struct proc_dir_entry *rm_entry;
204 struct proc_dir_entry *parent;
207 if (root == NULL || IS_ERR(root))
210 parent = root->parent;
211 LASSERT(parent != NULL);
214 while (temp->subdir != NULL)
220 /* Memory corruption once caused this to fail, and
221 without this LASSERT we would loop here forever. */
222 LASSERTF(strlen(rm_entry->name) == rm_entry->namelen,
223 "0x%p %s/%s len %d\n", rm_entry, temp->name,
224 rm_entry->name, (int)strlen(rm_entry->name));
226 remove_proc_entry(rm_entry->name, temp);
232 int remove_proc_subtree(const char *name, struct proc_dir_entry *parent)
234 struct proc_dir_entry *t = NULL;
235 struct proc_dir_entry **p;
238 LASSERT(parent != NULL);
241 down_write(&_lprocfs_lock);
242 /* lookup target name */
243 for (p = &parent->subdir; *p; p = &(*p)->next) {
244 if ((*p)->namelen != len)
246 if (memcmp(name, (*p)->name, len))
253 /* verify it's empty: do not count "num_refs" */
254 for (p = &t->subdir; *p; p = &(*p)->next) {
255 if ((*p)->namelen != strlen("num_refs")) {
259 if (memcmp("num_refs", (*p)->name,
260 strlen("num_refs"))) {
268 lprocfs_remove_nolock(&t);
270 up_write(&_lprocfs_lock);
273 #endif /* !HAVE_REMOVE_PROC_SUBTREE */
275 #ifndef HAVE_PROC_REMOVE
276 void proc_remove(struct proc_dir_entry *de)
278 #ifndef HAVE_REMOVE_PROC_SUBTREE
279 down_write(&_lprocfs_lock); /* search vs remove race */
280 lprocfs_remove_nolock(&de);
281 up_write(&_lprocfs_lock);
284 remove_proc_subtree(de->name, de->parent);
289 void lprocfs_remove(struct proc_dir_entry **rooth)
294 EXPORT_SYMBOL(lprocfs_remove);
296 void lprocfs_remove_proc_entry(const char *name, struct proc_dir_entry *parent)
298 LASSERT(parent != NULL);
299 remove_proc_entry(name, parent);
301 EXPORT_SYMBOL(lprocfs_remove_proc_entry);
303 struct dentry *ldebugfs_register(const char *name, struct dentry *parent,
304 struct lprocfs_vars *list, void *data)
306 struct dentry *entry;
308 entry = debugfs_create_dir(name, parent);
309 if (IS_ERR_OR_NULL(entry)) {
310 entry = entry ?: ERR_PTR(-ENOMEM);
314 if (!IS_ERR_OR_NULL(list)) {
317 rc = ldebugfs_add_vars(entry, list, data);
319 debugfs_remove(entry);
326 EXPORT_SYMBOL_GPL(ldebugfs_register);
328 struct proc_dir_entry *
329 lprocfs_register(const char *name, struct proc_dir_entry *parent,
330 struct lprocfs_vars *list, void *data)
332 struct proc_dir_entry *newchild;
334 newchild = proc_mkdir(name, parent);
335 if (newchild == NULL)
336 return ERR_PTR(-ENOMEM);
339 int rc = lprocfs_add_vars(newchild, list, data);
341 lprocfs_remove(&newchild);
347 EXPORT_SYMBOL(lprocfs_register);
349 /* Generic callbacks */
350 int lprocfs_uint_seq_show(struct seq_file *m, void *data)
352 seq_printf(m, "%u\n", *(unsigned int *)data);
355 EXPORT_SYMBOL(lprocfs_uint_seq_show);
357 int lprocfs_wr_uint(struct file *file, const char __user *buffer,
358 unsigned long count, void *data)
361 char dummy[MAX_STRING_SIZE + 1];
365 if (count >= sizeof(dummy))
371 if (copy_from_user(dummy, buffer, count))
376 tmp = simple_strtoul(dummy, &end, 0);
380 *p = (unsigned int)tmp;
383 EXPORT_SYMBOL(lprocfs_wr_uint);
385 ssize_t lprocfs_uint_seq_write(struct file *file, const char __user *buffer,
386 size_t count, loff_t *off)
388 int *data = ((struct seq_file *)file->private_data)->private;
392 rc = lprocfs_str_to_s64(buffer, count, &val);
396 return lprocfs_wr_uint(file, buffer, count, data);
398 EXPORT_SYMBOL(lprocfs_uint_seq_write);
400 int lprocfs_u64_seq_show(struct seq_file *m, void *data)
402 LASSERT(data != NULL);
403 seq_printf(m, "%llu\n", *(__u64 *)data);
406 EXPORT_SYMBOL(lprocfs_u64_seq_show);
408 int lprocfs_atomic_seq_show(struct seq_file *m, void *data)
410 atomic_t *atom = data;
411 LASSERT(atom != NULL);
412 seq_printf(m, "%d\n", atomic_read(atom));
415 EXPORT_SYMBOL(lprocfs_atomic_seq_show);
418 lprocfs_atomic_seq_write(struct file *file, const char __user *buffer,
419 size_t count, loff_t *off)
421 atomic_t *atm = ((struct seq_file *)file->private_data)->private;
425 rc = lprocfs_str_to_s64(buffer, count, &val);
429 if (val <= 0 || val > INT_MAX)
432 atomic_set(atm, val);
435 EXPORT_SYMBOL(lprocfs_atomic_seq_write);
437 int lprocfs_uuid_seq_show(struct seq_file *m, void *data)
439 struct obd_device *obd = data;
441 LASSERT(obd != NULL);
442 seq_printf(m, "%s\n", obd->obd_uuid.uuid);
445 EXPORT_SYMBOL(lprocfs_uuid_seq_show);
447 static ssize_t uuid_show(struct kobject *kobj, struct attribute *attr,
450 struct obd_device *obd = container_of(kobj, struct obd_device,
453 return sprintf(buf, "%s\n", obd->obd_uuid.uuid);
455 LUSTRE_RO_ATTR(uuid);
457 int lprocfs_name_seq_show(struct seq_file *m, void *data)
459 struct obd_device *dev = data;
461 LASSERT(dev != NULL);
462 seq_printf(m, "%s\n", dev->obd_name);
465 EXPORT_SYMBOL(lprocfs_name_seq_show);
467 static ssize_t blocksize_show(struct kobject *kobj, struct attribute *attr,
470 struct obd_device *obd = container_of(kobj, struct obd_device,
472 struct obd_statfs osfs;
473 int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
474 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
477 return sprintf(buf, "%u\n", osfs.os_bsize);
481 LUSTRE_RO_ATTR(blocksize);
483 static ssize_t kbytestotal_show(struct kobject *kobj, struct attribute *attr,
486 struct obd_device *obd = container_of(kobj, struct obd_device,
488 struct obd_statfs osfs;
489 int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
490 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
493 u32 blk_size = osfs.os_bsize >> 10;
494 u64 result = osfs.os_blocks;
496 while (blk_size >>= 1)
499 return sprintf(buf, "%llu\n", result);
504 LUSTRE_RO_ATTR(kbytestotal);
506 static ssize_t kbytesfree_show(struct kobject *kobj, struct attribute *attr,
509 struct obd_device *obd = container_of(kobj, struct obd_device,
511 struct obd_statfs osfs;
512 int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
513 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
516 u32 blk_size = osfs.os_bsize >> 10;
517 u64 result = osfs.os_bfree;
519 while (blk_size >>= 1)
522 return sprintf(buf, "%llu\n", result);
527 LUSTRE_RO_ATTR(kbytesfree);
529 static ssize_t kbytesavail_show(struct kobject *kobj, struct attribute *attr,
532 struct obd_device *obd = container_of(kobj, struct obd_device,
534 struct obd_statfs osfs;
535 int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
536 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
539 u32 blk_size = osfs.os_bsize >> 10;
540 u64 result = osfs.os_bavail;
542 while (blk_size >>= 1)
545 return sprintf(buf, "%llu\n", result);
550 LUSTRE_RO_ATTR(kbytesavail);
552 static ssize_t filestotal_show(struct kobject *kobj, struct attribute *attr,
555 struct obd_device *obd = container_of(kobj, struct obd_device,
557 struct obd_statfs osfs;
558 int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
559 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
562 return sprintf(buf, "%llu\n", osfs.os_files);
566 LUSTRE_RO_ATTR(filestotal);
568 static ssize_t filesfree_show(struct kobject *kobj, struct attribute *attr,
571 struct obd_device *obd = container_of(kobj, struct obd_device,
573 struct obd_statfs osfs;
574 int rc = obd_statfs(NULL, obd->obd_self_export, &osfs,
575 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
578 return sprintf(buf, "%llu\n", osfs.os_ffree);
582 LUSTRE_RO_ATTR(filesfree);
584 int lprocfs_server_uuid_seq_show(struct seq_file *m, void *data)
586 struct obd_device *obd = data;
587 struct obd_import *imp;
588 char *imp_state_name = NULL;
591 LASSERT(obd != NULL);
592 LPROCFS_CLIMP_CHECK(obd);
593 imp = obd->u.cli.cl_import;
594 imp_state_name = ptlrpc_import_state_name(imp->imp_state);
595 seq_printf(m, "%s\t%s%s\n", obd2cli_tgt(obd), imp_state_name,
596 imp->imp_deactive ? "\tDEACTIVATED" : "");
598 LPROCFS_CLIMP_EXIT(obd);
601 EXPORT_SYMBOL(lprocfs_server_uuid_seq_show);
603 int lprocfs_conn_uuid_seq_show(struct seq_file *m, void *data)
605 struct obd_device *obd = data;
606 struct ptlrpc_connection *conn;
609 LASSERT(obd != NULL);
611 LPROCFS_CLIMP_CHECK(obd);
612 conn = obd->u.cli.cl_import->imp_connection;
613 if (conn && obd->u.cli.cl_import)
614 seq_printf(m, "%s\n", conn->c_remote_uuid.uuid);
616 seq_printf(m, "%s\n", "<none>");
618 LPROCFS_CLIMP_EXIT(obd);
621 EXPORT_SYMBOL(lprocfs_conn_uuid_seq_show);
623 /** add up per-cpu counters */
626 * Lock statistics structure for access, possibly only on this CPU.
628 * The statistics struct may be allocated with per-CPU structures for
629 * efficient concurrent update (usually only on server-wide stats), or
630 * as a single global struct (e.g. for per-client or per-job statistics),
631 * so the required locking depends on the type of structure allocated.
633 * For per-CPU statistics, pin the thread to the current cpuid so that
634 * will only access the statistics for that CPU. If the stats structure
635 * for the current CPU has not been allocated (or previously freed),
636 * allocate it now. The per-CPU statistics do not need locking since
637 * the thread is pinned to the CPU during update.
639 * For global statistics, lock the stats structure to prevent concurrent update.
641 * \param[in] stats statistics structure to lock
642 * \param[in] opc type of operation:
643 * LPROCFS_GET_SMP_ID: "lock" and return current CPU index
644 * for incrementing statistics for that CPU
645 * LPROCFS_GET_NUM_CPU: "lock" and return number of used
646 * CPU indices to iterate over all indices
647 * \param[out] flags CPU interrupt saved state for IRQ-safe locking
649 * \retval cpuid of current thread or number of allocated structs
650 * \retval negative on error (only for opc LPROCFS_GET_SMP_ID + per-CPU stats)
652 int lprocfs_stats_lock(struct lprocfs_stats *stats,
653 enum lprocfs_stats_lock_ops opc,
654 unsigned long *flags)
656 if (stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU) {
657 if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
658 spin_lock_irqsave(&stats->ls_lock, *flags);
660 spin_lock(&stats->ls_lock);
661 return opc == LPROCFS_GET_NUM_CPU ? 1 : 0;
665 case LPROCFS_GET_SMP_ID: {
666 unsigned int cpuid = get_cpu();
668 if (unlikely(!stats->ls_percpu[cpuid])) {
669 int rc = lprocfs_stats_alloc_one(stats, cpuid);
678 case LPROCFS_GET_NUM_CPU:
679 return stats->ls_biggest_alloc_num;
686 * Unlock statistics structure after access.
688 * Unlock the lock acquired via lprocfs_stats_lock() for global statistics,
689 * or unpin this thread from the current cpuid for per-CPU statistics.
691 * This function must be called using the same arguments as used when calling
692 * lprocfs_stats_lock() so that the correct operation can be performed.
694 * \param[in] stats statistics structure to unlock
695 * \param[in] opc type of operation (current cpuid or number of structs)
696 * \param[in] flags CPU interrupt saved state for IRQ-safe locking
698 void lprocfs_stats_unlock(struct lprocfs_stats *stats,
699 enum lprocfs_stats_lock_ops opc,
700 unsigned long *flags)
702 if (stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU) {
703 if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
704 spin_unlock_irqrestore(&stats->ls_lock, *flags);
706 spin_unlock(&stats->ls_lock);
707 } else if (opc == LPROCFS_GET_SMP_ID) {
712 /** add up per-cpu counters */
713 void lprocfs_stats_collect(struct lprocfs_stats *stats, int idx,
714 struct lprocfs_counter *cnt)
716 unsigned int num_entry;
717 struct lprocfs_counter *percpu_cntr;
719 unsigned long flags = 0;
721 memset(cnt, 0, sizeof(*cnt));
724 /* set count to 1 to avoid divide-by-zero errs in callers */
729 cnt->lc_min = LC_MIN_INIT;
731 num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
733 for (i = 0; i < num_entry; i++) {
734 if (stats->ls_percpu[i] == NULL)
736 percpu_cntr = lprocfs_stats_counter_get(stats, i, idx);
738 cnt->lc_count += percpu_cntr->lc_count;
739 cnt->lc_sum += percpu_cntr->lc_sum;
740 if (percpu_cntr->lc_min < cnt->lc_min)
741 cnt->lc_min = percpu_cntr->lc_min;
742 if (percpu_cntr->lc_max > cnt->lc_max)
743 cnt->lc_max = percpu_cntr->lc_max;
744 cnt->lc_sumsquare += percpu_cntr->lc_sumsquare;
747 lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
751 * Append a space separated list of current set flags to str.
753 #define flag2str(flag) \
755 if (imp->imp_##flag) { \
756 seq_printf(m, "%s" #flag, first ? "" : ", "); \
760 static void obd_import_flags2str(struct obd_import *imp, struct seq_file *m)
764 if (imp->imp_obd->obd_no_recov) {
765 seq_printf(m, "no_recov");
771 flag2str(replayable);
772 flag2str(delayed_recovery);
773 flag2str(no_lock_replay);
774 flag2str(vbr_failed);
776 flag2str(resend_replay);
777 flag2str(no_pinger_recover);
778 flag2str(need_mne_swab);
779 flag2str(connect_tried);
783 static const char *obd_connect_names[] = {
802 "remote_client_by_force",
811 "mds_mds_connection",
814 "alt_checksum_algorithm",
854 static void obd_connect_seq_flags2str(struct seq_file *m, __u64 flags,
855 __u64 flags2, const char *sep)
861 for (i = 0, mask = 1; i < 64; i++, mask <<= 1) {
863 seq_printf(m, "%s%s",
864 first ? "" : sep, obd_connect_names[i]);
869 if (flags & ~(mask - 1)) {
870 seq_printf(m, "%sunknown_%#llx",
871 first ? "" : sep, flags & ~(mask - 1));
875 if (!(flags & OBD_CONNECT_FLAGS2) || flags2 == 0)
878 for (i = 64, mask = 1; obd_connect_names[i] != NULL; i++, mask <<= 1) {
880 seq_printf(m, "%s%s",
881 first ? "" : sep, obd_connect_names[i]);
886 if (flags2 & ~(mask - 1)) {
887 seq_printf(m, "%sunknown2_%#llx",
888 first ? "" : sep, flags2 & ~(mask - 1));
893 int obd_connect_flags2str(char *page, int count, __u64 flags, __u64 flags2,
899 for (i = 0, mask = 1; i < 64; i++, mask <<= 1) {
901 ret += snprintf(page + ret, count - ret, "%s%s",
902 ret ? sep : "", obd_connect_names[i]);
905 if (flags & ~(mask - 1))
906 ret += snprintf(page + ret, count - ret,
908 ret ? sep : "", flags & ~(mask - 1));
910 if (!(flags & OBD_CONNECT_FLAGS2) || flags2 == 0)
913 for (i = 64, mask = 1; obd_connect_names[i] != NULL; i++, mask <<= 1) {
915 ret += snprintf(page + ret, count - ret, "%s%s",
916 ret ? sep : "", obd_connect_names[i]);
919 if (flags2 & ~(mask - 1))
920 ret += snprintf(page + ret, count - ret,
922 ret ? sep : "", flags2 & ~(mask - 1));
926 EXPORT_SYMBOL(obd_connect_flags2str);
928 static void obd_connect_data_seqprint(struct seq_file *m,
929 struct obd_connect_data *ocd)
933 LASSERT(ocd != NULL);
934 flags = ocd->ocd_connect_flags;
936 seq_printf(m, " connect_data:\n"
939 ocd->ocd_connect_flags,
941 if (flags & OBD_CONNECT_VERSION)
942 seq_printf(m, " target_version: %u.%u.%u.%u\n",
943 OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
944 OBD_OCD_VERSION_MINOR(ocd->ocd_version),
945 OBD_OCD_VERSION_PATCH(ocd->ocd_version),
946 OBD_OCD_VERSION_FIX(ocd->ocd_version));
947 if (flags & OBD_CONNECT_MDS)
948 seq_printf(m, " mdt_index: %d\n", ocd->ocd_group);
949 if (flags & OBD_CONNECT_GRANT)
950 seq_printf(m, " initial_grant: %d\n", ocd->ocd_grant);
951 if (flags & OBD_CONNECT_INDEX)
952 seq_printf(m, " target_index: %u\n", ocd->ocd_index);
953 if (flags & OBD_CONNECT_BRW_SIZE)
954 seq_printf(m, " max_brw_size: %d\n", ocd->ocd_brw_size);
955 if (flags & OBD_CONNECT_IBITS)
956 seq_printf(m, " ibits_known: %#llx\n",
957 ocd->ocd_ibits_known);
958 if (flags & OBD_CONNECT_GRANT_PARAM)
959 seq_printf(m, " grant_block_size: %d\n"
960 " grant_inode_size: %d\n"
961 " grant_max_extent_size: %d\n"
962 " grant_extent_tax: %d\n",
963 1 << ocd->ocd_grant_blkbits,
964 1 << ocd->ocd_grant_inobits,
965 ocd->ocd_grant_max_blks << ocd->ocd_grant_blkbits,
966 ocd->ocd_grant_tax_kb << 10);
967 if (flags & OBD_CONNECT_TRANSNO)
968 seq_printf(m, " first_transno: %#llx\n",
970 if (flags & OBD_CONNECT_CKSUM)
971 seq_printf(m, " cksum_types: %#x\n",
972 ocd->ocd_cksum_types);
973 if (flags & OBD_CONNECT_MAX_EASIZE)
974 seq_printf(m, " max_easize: %d\n", ocd->ocd_max_easize);
975 if (flags & OBD_CONNECT_MAXBYTES)
976 seq_printf(m, " max_object_bytes: %llu\n",
978 if (flags & OBD_CONNECT_MULTIMODRPCS)
979 seq_printf(m, " max_mod_rpcs: %hu\n",
980 ocd->ocd_maxmodrpcs);
983 int lprocfs_import_seq_show(struct seq_file *m, void *data)
985 char nidstr[LNET_NIDSTR_SIZE];
986 struct lprocfs_counter ret;
987 struct lprocfs_counter_header *header;
988 struct obd_device *obd = (struct obd_device *)data;
989 struct obd_import *imp;
990 struct obd_import_conn *conn;
991 struct obd_connect_data *ocd;
996 LASSERT(obd != NULL);
997 LPROCFS_CLIMP_CHECK(obd);
998 imp = obd->u.cli.cl_import;
999 ocd = &imp->imp_connect_data;
1001 seq_printf(m, "import:\n"
1005 " connect_flags: [ ",
1008 ptlrpc_import_state_name(imp->imp_state));
1009 obd_connect_seq_flags2str(m, imp->imp_connect_data.ocd_connect_flags,
1010 imp->imp_connect_data.ocd_connect_flags2,
1012 seq_printf(m, " ]\n");
1013 obd_connect_data_seqprint(m, ocd);
1014 seq_printf(m, " import_flags: [ ");
1015 obd_import_flags2str(imp, m);
1017 seq_printf(m, " ]\n"
1019 " failover_nids: [ ");
1020 spin_lock(&imp->imp_lock);
1022 list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
1023 libcfs_nid2str_r(conn->oic_conn->c_peer.nid,
1024 nidstr, sizeof(nidstr));
1025 seq_printf(m, "%s%s", j ? ", " : "", nidstr);
1028 if (imp->imp_connection != NULL)
1029 libcfs_nid2str_r(imp->imp_connection->c_peer.nid,
1030 nidstr, sizeof(nidstr));
1032 strncpy(nidstr, "<none>", sizeof(nidstr));
1033 seq_printf(m, " ]\n"
1034 " current_connection: %s\n"
1035 " connection_attempts: %u\n"
1037 " in-progress_invalidations: %u\n",
1040 imp->imp_generation,
1041 atomic_read(&imp->imp_inval_count));
1042 spin_unlock(&imp->imp_lock);
1044 if (obd->obd_svc_stats == NULL)
1047 header = &obd->obd_svc_stats->ls_cnt_header[PTLRPC_REQWAIT_CNTR];
1048 lprocfs_stats_collect(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR, &ret);
1049 if (ret.lc_count != 0) {
1050 /* first argument to do_div MUST be __u64 */
1051 __u64 sum = ret.lc_sum;
1052 do_div(sum, ret.lc_count);
1056 seq_printf(m, " rpcs:\n"
1058 " unregistering: %u\n"
1060 " avg_waittime: %llu %s\n",
1061 atomic_read(&imp->imp_inflight),
1062 atomic_read(&imp->imp_unregistering),
1063 atomic_read(&imp->imp_timeouts),
1064 ret.lc_sum, header->lc_units);
1067 for(j = 0; j < IMP_AT_MAX_PORTALS; j++) {
1068 if (imp->imp_at.iat_portal[j] == 0)
1070 k = max_t(unsigned int, k,
1071 at_get(&imp->imp_at.iat_service_estimate[j]));
1073 seq_printf(m, " service_estimates:\n"
1074 " services: %u sec\n"
1075 " network: %u sec\n",
1077 at_get(&imp->imp_at.iat_net_latency));
1079 seq_printf(m, " transactions:\n"
1080 " last_replay: %llu\n"
1081 " peer_committed: %llu\n"
1082 " last_checked: %llu\n",
1083 imp->imp_last_replay_transno,
1084 imp->imp_peer_committed_transno,
1085 imp->imp_last_transno_checked);
1087 /* avg data rates */
1088 for (rw = 0; rw <= 1; rw++) {
1089 lprocfs_stats_collect(obd->obd_svc_stats,
1090 PTLRPC_LAST_CNTR + BRW_READ_BYTES + rw,
1092 if (ret.lc_sum > 0 && ret.lc_count > 0) {
1093 /* first argument to do_div MUST be __u64 */
1094 __u64 sum = ret.lc_sum;
1095 do_div(sum, ret.lc_count);
1097 seq_printf(m, " %s_data_averages:\n"
1098 " bytes_per_rpc: %llu\n",
1099 rw ? "write" : "read",
1102 k = (int)ret.lc_sum;
1103 j = opcode_offset(OST_READ + rw) + EXTRA_MAX_OPCODES;
1104 header = &obd->obd_svc_stats->ls_cnt_header[j];
1105 lprocfs_stats_collect(obd->obd_svc_stats, j, &ret);
1106 if (ret.lc_sum > 0 && ret.lc_count != 0) {
1107 /* first argument to do_div MUST be __u64 */
1108 __u64 sum = ret.lc_sum;
1109 do_div(sum, ret.lc_count);
1111 seq_printf(m, " %s_per_rpc: %llu\n",
1112 header->lc_units, ret.lc_sum);
1113 j = (int)ret.lc_sum;
1115 seq_printf(m, " MB_per_sec: %u.%.02u\n",
1116 k / j, (100 * k / j) % 100);
1121 LPROCFS_CLIMP_EXIT(obd);
1124 EXPORT_SYMBOL(lprocfs_import_seq_show);
1126 int lprocfs_state_seq_show(struct seq_file *m, void *data)
1128 struct obd_device *obd = (struct obd_device *)data;
1129 struct obd_import *imp;
1132 LASSERT(obd != NULL);
1133 LPROCFS_CLIMP_CHECK(obd);
1134 imp = obd->u.cli.cl_import;
1136 seq_printf(m, "current_state: %s\n",
1137 ptlrpc_import_state_name(imp->imp_state));
1138 seq_printf(m, "state_history:\n");
1139 k = imp->imp_state_hist_idx;
1140 for (j = 0; j < IMP_STATE_HIST_LEN; j++) {
1141 struct import_state_hist *ish =
1142 &imp->imp_state_hist[(k + j) % IMP_STATE_HIST_LEN];
1143 if (ish->ish_state == 0)
1145 seq_printf(m, " - [ %lld, %s ]\n", (s64)ish->ish_time,
1146 ptlrpc_import_state_name(ish->ish_state));
1149 LPROCFS_CLIMP_EXIT(obd);
1152 EXPORT_SYMBOL(lprocfs_state_seq_show);
1154 int lprocfs_at_hist_helper(struct seq_file *m, struct adaptive_timeout *at)
1157 for (i = 0; i < AT_BINS; i++)
1158 seq_printf(m, "%3u ", at->at_hist[i]);
1159 seq_printf(m, "\n");
1162 EXPORT_SYMBOL(lprocfs_at_hist_helper);
1164 /* See also ptlrpc_lprocfs_timeouts_show_seq */
1165 int lprocfs_timeouts_seq_show(struct seq_file *m, void *data)
1167 struct obd_device *obd = (struct obd_device *)data;
1168 struct obd_import *imp;
1169 unsigned int cur, worst;
1170 time64_t now, worstt;
1173 LASSERT(obd != NULL);
1174 LPROCFS_CLIMP_CHECK(obd);
1175 imp = obd->u.cli.cl_import;
1177 now = ktime_get_real_seconds();
1179 /* Some network health info for kicks */
1180 seq_printf(m, "%-10s : %lld, %llds ago\n",
1181 "last reply", (s64)imp->imp_last_reply_time,
1182 (s64)(now - imp->imp_last_reply_time));
1184 cur = at_get(&imp->imp_at.iat_net_latency);
1185 worst = imp->imp_at.iat_net_latency.at_worst_ever;
1186 worstt = imp->imp_at.iat_net_latency.at_worst_time;
1187 seq_printf(m, "%-10s : cur %3u worst %3u (at %lld, %llds ago) ",
1188 "network", cur, worst, (s64)worstt, (s64)(now - worstt));
1189 lprocfs_at_hist_helper(m, &imp->imp_at.iat_net_latency);
1191 for(i = 0; i < IMP_AT_MAX_PORTALS; i++) {
1192 if (imp->imp_at.iat_portal[i] == 0)
1194 cur = at_get(&imp->imp_at.iat_service_estimate[i]);
1195 worst = imp->imp_at.iat_service_estimate[i].at_worst_ever;
1196 worstt = imp->imp_at.iat_service_estimate[i].at_worst_time;
1197 seq_printf(m, "portal %-2d : cur %3u worst %3u (at %lld, %llds ago) ",
1198 imp->imp_at.iat_portal[i], cur, worst, (s64)worstt,
1199 (s64)(now - worstt));
1200 lprocfs_at_hist_helper(m, &imp->imp_at.iat_service_estimate[i]);
1203 LPROCFS_CLIMP_EXIT(obd);
1206 EXPORT_SYMBOL(lprocfs_timeouts_seq_show);
1208 int lprocfs_connect_flags_seq_show(struct seq_file *m, void *data)
1210 struct obd_device *obd = data;
1214 LPROCFS_CLIMP_CHECK(obd);
1215 flags = obd->u.cli.cl_import->imp_connect_data.ocd_connect_flags;
1216 flags2 = obd->u.cli.cl_import->imp_connect_data.ocd_connect_flags2;
1217 seq_printf(m, "flags=%#llx\n", flags);
1218 seq_printf(m, "flags2=%#llx\n", flags2);
1219 obd_connect_seq_flags2str(m, flags, flags2, "\n");
1220 seq_printf(m, "\n");
1221 LPROCFS_CLIMP_EXIT(obd);
1224 EXPORT_SYMBOL(lprocfs_connect_flags_seq_show);
1226 static struct attribute *obd_def_uuid_attrs[] = {
1227 &lustre_attr_uuid.attr,
1231 static struct attribute *obd_def_attrs[] = {
1232 &lustre_attr_blocksize.attr,
1233 &lustre_attr_kbytestotal.attr,
1234 &lustre_attr_kbytesfree.attr,
1235 &lustre_attr_kbytesavail.attr,
1236 &lustre_attr_filestotal.attr,
1237 &lustre_attr_filesfree.attr,
1238 &lustre_attr_uuid.attr,
1242 static void obd_sysfs_release(struct kobject *kobj)
1244 struct obd_device *obd = container_of(kobj, struct obd_device,
1247 complete(&obd->obd_kobj_unregister);
1250 static struct kobj_type obd_ktype = {
1251 .sysfs_ops = &lustre_sysfs_ops,
1252 .release = obd_sysfs_release,
1256 lprocfs_obd_setup(struct obd_device *obd, bool uuid_only)
1260 LASSERT(obd != NULL);
1261 LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
1262 LASSERT(obd->obd_type->typ_procroot != NULL);
1265 obd_ktype.default_attrs = obd_def_uuid_attrs;
1267 obd_ktype.default_attrs = obd_def_attrs;
1269 init_completion(&obd->obd_kobj_unregister);
1270 rc = kobject_init_and_add(&obd->obd_kobj, &obd_ktype,
1271 obd->obd_type->typ_kobj,
1272 "%s", obd->obd_name);
1276 if (obd->obd_attrs) {
1277 rc = sysfs_create_group(&obd->obd_kobj, obd->obd_attrs);
1279 kobject_put(&obd->obd_kobj);
1284 obd->obd_proc_entry = lprocfs_register(obd->obd_name,
1285 obd->obd_type->typ_procroot,
1286 obd->obd_vars, obd);
1287 if (IS_ERR(obd->obd_proc_entry)) {
1288 kobject_put(&obd->obd_kobj);
1289 rc = PTR_ERR(obd->obd_proc_entry);
1290 CERROR("error %d setting up lprocfs for %s\n",rc,obd->obd_name);
1291 obd->obd_proc_entry = NULL;
1296 EXPORT_SYMBOL(lprocfs_obd_setup);
1298 int lprocfs_obd_cleanup(struct obd_device *obd)
1303 if (obd->obd_proc_exports_entry) {
1304 /* Should be no exports left */
1305 lprocfs_remove(&obd->obd_proc_exports_entry);
1306 obd->obd_proc_exports_entry = NULL;
1309 if (obd->obd_proc_entry) {
1310 lprocfs_remove(&obd->obd_proc_entry);
1311 obd->obd_proc_entry = NULL;
1314 kobject_put(&obd->obd_kobj);
1315 wait_for_completion(&obd->obd_kobj_unregister);
1318 EXPORT_SYMBOL(lprocfs_obd_cleanup);
1320 int lprocfs_stats_alloc_one(struct lprocfs_stats *stats, unsigned int cpuid)
1322 struct lprocfs_counter *cntr;
1323 unsigned int percpusize;
1325 unsigned long flags = 0;
1328 LASSERT(stats->ls_percpu[cpuid] == NULL);
1329 LASSERT((stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU) == 0);
1331 percpusize = lprocfs_stats_counter_size(stats);
1332 LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[cpuid], percpusize);
1333 if (stats->ls_percpu[cpuid] != NULL) {
1335 if (unlikely(stats->ls_biggest_alloc_num <= cpuid)) {
1336 if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
1337 spin_lock_irqsave(&stats->ls_lock, flags);
1339 spin_lock(&stats->ls_lock);
1340 if (stats->ls_biggest_alloc_num <= cpuid)
1341 stats->ls_biggest_alloc_num = cpuid + 1;
1342 if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE) {
1343 spin_unlock_irqrestore(&stats->ls_lock, flags);
1345 spin_unlock(&stats->ls_lock);
1348 /* initialize the ls_percpu[cpuid] non-zero counter */
1349 for (i = 0; i < stats->ls_num; ++i) {
1350 cntr = lprocfs_stats_counter_get(stats, cpuid, i);
1351 cntr->lc_min = LC_MIN_INIT;
1357 struct lprocfs_stats *lprocfs_alloc_stats(unsigned int num,
1358 enum lprocfs_stats_flags flags)
1360 struct lprocfs_stats *stats;
1361 unsigned int num_entry;
1362 unsigned int percpusize = 0;
1368 if (lprocfs_no_percpu_stats != 0)
1369 flags |= LPROCFS_STATS_FLAG_NOPERCPU;
1371 if (flags & LPROCFS_STATS_FLAG_NOPERCPU)
1374 num_entry = num_possible_cpus();
1376 /* alloc percpu pointers for all possible cpu slots */
1377 LIBCFS_ALLOC(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
1381 stats->ls_num = num;
1382 stats->ls_flags = flags;
1383 spin_lock_init(&stats->ls_lock);
1385 /* alloc num of counter headers */
1386 LIBCFS_ALLOC(stats->ls_cnt_header,
1387 stats->ls_num * sizeof(struct lprocfs_counter_header));
1388 if (stats->ls_cnt_header == NULL)
1391 if ((flags & LPROCFS_STATS_FLAG_NOPERCPU) != 0) {
1392 /* contains only one set counters */
1393 percpusize = lprocfs_stats_counter_size(stats);
1394 LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[0], percpusize);
1395 if (stats->ls_percpu[0] == NULL)
1397 stats->ls_biggest_alloc_num = 1;
1398 } else if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0) {
1399 /* alloc all percpu data, currently only obd_memory use this */
1400 for (i = 0; i < num_entry; ++i)
1401 if (lprocfs_stats_alloc_one(stats, i) < 0)
1408 lprocfs_free_stats(&stats);
1411 EXPORT_SYMBOL(lprocfs_alloc_stats);
1413 void lprocfs_free_stats(struct lprocfs_stats **statsh)
1415 struct lprocfs_stats *stats = *statsh;
1416 unsigned int num_entry;
1417 unsigned int percpusize;
1420 if (stats == NULL || stats->ls_num == 0)
1424 if (stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU)
1427 num_entry = num_possible_cpus();
1429 percpusize = lprocfs_stats_counter_size(stats);
1430 for (i = 0; i < num_entry; i++)
1431 if (stats->ls_percpu[i] != NULL)
1432 LIBCFS_FREE(stats->ls_percpu[i], percpusize);
1433 if (stats->ls_cnt_header != NULL)
1434 LIBCFS_FREE(stats->ls_cnt_header, stats->ls_num *
1435 sizeof(struct lprocfs_counter_header));
1436 LIBCFS_FREE(stats, offsetof(typeof(*stats), ls_percpu[num_entry]));
1438 EXPORT_SYMBOL(lprocfs_free_stats);
1440 u64 lprocfs_stats_collector(struct lprocfs_stats *stats, int idx,
1441 enum lprocfs_fields_flags field)
1443 unsigned long flags = 0;
1444 unsigned int num_cpu;
1450 num_cpu = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
1451 for (i = 0; i < num_cpu; i++) {
1452 struct lprocfs_counter *cntr;
1454 if (!stats->ls_percpu[i])
1457 cntr = lprocfs_stats_counter_get(stats, i, idx);
1458 ret += lprocfs_read_helper(cntr, &stats->ls_cnt_header[idx],
1459 stats->ls_flags, field);
1461 lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
1464 EXPORT_SYMBOL(lprocfs_stats_collector);
1466 void lprocfs_clear_stats(struct lprocfs_stats *stats)
1468 struct lprocfs_counter *percpu_cntr;
1471 unsigned int num_entry;
1472 unsigned long flags = 0;
1474 num_entry = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
1476 for (i = 0; i < num_entry; i++) {
1477 if (stats->ls_percpu[i] == NULL)
1479 for (j = 0; j < stats->ls_num; j++) {
1480 percpu_cntr = lprocfs_stats_counter_get(stats, i, j);
1481 percpu_cntr->lc_count = 0;
1482 percpu_cntr->lc_min = LC_MIN_INIT;
1483 percpu_cntr->lc_max = 0;
1484 percpu_cntr->lc_sumsquare = 0;
1485 percpu_cntr->lc_sum = 0;
1486 if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
1487 percpu_cntr->lc_sum_irq = 0;
1491 lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
1493 EXPORT_SYMBOL(lprocfs_clear_stats);
1495 static ssize_t lprocfs_stats_seq_write(struct file *file,
1496 const char __user *buf,
1497 size_t len, loff_t *off)
1499 struct seq_file *seq = file->private_data;
1500 struct lprocfs_stats *stats = seq->private;
1502 lprocfs_clear_stats(stats);
1507 static void *lprocfs_stats_seq_start(struct seq_file *p, loff_t *pos)
1509 struct lprocfs_stats *stats = p->private;
1511 return (*pos < stats->ls_num) ? pos : NULL;
1514 static void lprocfs_stats_seq_stop(struct seq_file *p, void *v)
1518 static void *lprocfs_stats_seq_next(struct seq_file *p, void *v, loff_t *pos)
1522 return lprocfs_stats_seq_start(p, pos);
1525 /* seq file export of one lprocfs counter */
1526 static int lprocfs_stats_seq_show(struct seq_file *p, void *v)
1528 struct lprocfs_stats *stats = p->private;
1529 struct lprocfs_counter_header *hdr;
1530 struct lprocfs_counter ctr;
1531 int idx = *(loff_t *)v;
1534 struct timespec64 now;
1536 ktime_get_real_ts64(&now);
1537 seq_printf(p, "%-25s %llu.%09lu secs.nsecs\n",
1538 "snapshot_time", (s64)now.tv_sec, now.tv_nsec);
1541 hdr = &stats->ls_cnt_header[idx];
1542 lprocfs_stats_collect(stats, idx, &ctr);
1544 if (ctr.lc_count == 0)
1547 seq_printf(p, "%-25s %lld samples [%s]", hdr->lc_name,
1548 ctr.lc_count, hdr->lc_units);
1550 if ((hdr->lc_config & LPROCFS_CNTR_AVGMINMAX) && ctr.lc_count > 0) {
1551 seq_printf(p, " %lld %lld %lld",
1552 ctr.lc_min, ctr.lc_max, ctr.lc_sum);
1553 if (hdr->lc_config & LPROCFS_CNTR_STDDEV)
1554 seq_printf(p, " %llu", ctr.lc_sumsquare);
1560 static const struct seq_operations lprocfs_stats_seq_sops = {
1561 .start = lprocfs_stats_seq_start,
1562 .stop = lprocfs_stats_seq_stop,
1563 .next = lprocfs_stats_seq_next,
1564 .show = lprocfs_stats_seq_show,
1567 static int lprocfs_stats_seq_open(struct inode *inode, struct file *file)
1569 struct seq_file *seq;
1572 rc = LPROCFS_ENTRY_CHECK(inode);
1576 rc = seq_open(file, &lprocfs_stats_seq_sops);
1579 seq = file->private_data;
1580 seq->private = inode->i_private ? : PDE_DATA(inode);
1584 static const struct file_operations lprocfs_stats_seq_fops = {
1585 .owner = THIS_MODULE,
1586 .open = lprocfs_stats_seq_open,
1588 .write = lprocfs_stats_seq_write,
1589 .llseek = seq_lseek,
1590 .release = lprocfs_seq_release,
1593 int ldebugfs_register_stats(struct dentry *parent, const char *name,
1594 struct lprocfs_stats *stats)
1596 struct dentry *entry;
1598 LASSERT(!IS_ERR_OR_NULL(parent));
1600 entry = debugfs_create_file(name, 0644, parent, stats,
1601 &lprocfs_stats_seq_fops);
1602 if (IS_ERR_OR_NULL(entry))
1603 return entry ? PTR_ERR(entry) : -ENOMEM;
1607 EXPORT_SYMBOL_GPL(ldebugfs_register_stats);
1609 int lprocfs_register_stats(struct proc_dir_entry *root, const char *name,
1610 struct lprocfs_stats *stats)
1612 struct proc_dir_entry *entry;
1613 LASSERT(root != NULL);
1615 entry = proc_create_data(name, 0644, root,
1616 &lprocfs_stats_seq_fops, stats);
1621 EXPORT_SYMBOL(lprocfs_register_stats);
1623 void lprocfs_counter_init(struct lprocfs_stats *stats, int index,
1624 unsigned conf, const char *name, const char *units)
1626 struct lprocfs_counter_header *header;
1627 struct lprocfs_counter *percpu_cntr;
1628 unsigned long flags = 0;
1630 unsigned int num_cpu;
1632 LASSERT(stats != NULL);
1634 header = &stats->ls_cnt_header[index];
1635 LASSERTF(header != NULL, "Failed to allocate stats header:[%d]%s/%s\n",
1636 index, name, units);
1638 header->lc_config = conf;
1639 header->lc_name = name;
1640 header->lc_units = units;
1642 num_cpu = lprocfs_stats_lock(stats, LPROCFS_GET_NUM_CPU, &flags);
1643 for (i = 0; i < num_cpu; ++i) {
1644 if (stats->ls_percpu[i] == NULL)
1646 percpu_cntr = lprocfs_stats_counter_get(stats, i, index);
1647 percpu_cntr->lc_count = 0;
1648 percpu_cntr->lc_min = LC_MIN_INIT;
1649 percpu_cntr->lc_max = 0;
1650 percpu_cntr->lc_sumsquare = 0;
1651 percpu_cntr->lc_sum = 0;
1652 if ((stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
1653 percpu_cntr->lc_sum_irq = 0;
1655 lprocfs_stats_unlock(stats, LPROCFS_GET_NUM_CPU, &flags);
1657 EXPORT_SYMBOL(lprocfs_counter_init);
1659 /* Note that we only init md counters for ops whose offset is less
1660 * than NUM_MD_STATS. This is explained in a comment in the definition
1661 * of struct md_ops. */
1662 #define LPROCFS_MD_OP_INIT(base, stats, op) \
1664 unsigned int _idx = base + MD_COUNTER_OFFSET(op); \
1666 if (MD_COUNTER_OFFSET(op) < NUM_MD_STATS) { \
1667 LASSERT(_idx < stats->ls_num); \
1668 lprocfs_counter_init(stats, _idx, 0, #op, "reqs"); \
1672 void lprocfs_init_mps_stats(int num_private_stats, struct lprocfs_stats *stats)
1674 LPROCFS_MD_OP_INIT(num_private_stats, stats, get_root);
1675 LPROCFS_MD_OP_INIT(num_private_stats, stats, null_inode);
1676 LPROCFS_MD_OP_INIT(num_private_stats, stats, close);
1677 LPROCFS_MD_OP_INIT(num_private_stats, stats, create);
1678 LPROCFS_MD_OP_INIT(num_private_stats, stats, enqueue);
1679 LPROCFS_MD_OP_INIT(num_private_stats, stats, getattr);
1680 LPROCFS_MD_OP_INIT(num_private_stats, stats, getattr_name);
1681 LPROCFS_MD_OP_INIT(num_private_stats, stats, intent_lock);
1682 LPROCFS_MD_OP_INIT(num_private_stats, stats, link);
1683 LPROCFS_MD_OP_INIT(num_private_stats, stats, rename);
1684 LPROCFS_MD_OP_INIT(num_private_stats, stats, setattr);
1685 LPROCFS_MD_OP_INIT(num_private_stats, stats, fsync);
1686 LPROCFS_MD_OP_INIT(num_private_stats, stats, read_page);
1687 LPROCFS_MD_OP_INIT(num_private_stats, stats, unlink);
1688 LPROCFS_MD_OP_INIT(num_private_stats, stats, setxattr);
1689 LPROCFS_MD_OP_INIT(num_private_stats, stats, getxattr);
1690 LPROCFS_MD_OP_INIT(num_private_stats, stats, init_ea_size);
1691 LPROCFS_MD_OP_INIT(num_private_stats, stats, get_lustre_md);
1692 LPROCFS_MD_OP_INIT(num_private_stats, stats, free_lustre_md);
1693 LPROCFS_MD_OP_INIT(num_private_stats, stats, merge_attr);
1694 LPROCFS_MD_OP_INIT(num_private_stats, stats, set_open_replay_data);
1695 LPROCFS_MD_OP_INIT(num_private_stats, stats, clear_open_replay_data);
1696 LPROCFS_MD_OP_INIT(num_private_stats, stats, set_lock_data);
1697 LPROCFS_MD_OP_INIT(num_private_stats, stats, lock_match);
1698 LPROCFS_MD_OP_INIT(num_private_stats, stats, cancel_unused);
1699 LPROCFS_MD_OP_INIT(num_private_stats, stats, intent_getattr_async);
1700 LPROCFS_MD_OP_INIT(num_private_stats, stats, revalidate_lock);
1703 int lprocfs_alloc_md_stats(struct obd_device *obd,
1704 unsigned int num_private_stats)
1706 struct lprocfs_stats *stats;
1707 unsigned int num_stats;
1710 CLASSERT(offsetof(struct md_ops, MD_STATS_FIRST_OP) == 0);
1711 CLASSERT(_MD_COUNTER_OFFSET(MD_STATS_FIRST_OP) == 0);
1712 CLASSERT(_MD_COUNTER_OFFSET(MD_STATS_LAST_OP) > 0);
1714 /* TODO Ensure that this function is only used where
1715 * appropriate by adding an assertion to the effect that
1716 * obd->obd_type->typ_md_ops is not NULL. We can't do this now
1717 * because mdt_procfs_init() uses this function to allocate
1718 * the stats backing /proc/fs/lustre/mdt/.../md_stats but the
1719 * mdt layer does not use the md_ops interface. This is
1720 * confusing and a waste of memory. See LU-2484.
1722 LASSERT(obd->obd_proc_entry != NULL);
1723 LASSERT(obd->obd_md_stats == NULL);
1724 LASSERT(obd->obd_md_cntr_base == 0);
1726 num_stats = NUM_MD_STATS + num_private_stats;
1727 stats = lprocfs_alloc_stats(num_stats, 0);
1731 lprocfs_init_mps_stats(num_private_stats, stats);
1733 for (i = num_private_stats; i < num_stats; i++) {
1734 if (stats->ls_cnt_header[i].lc_name == NULL) {
1735 CERROR("Missing md_stat initializer md_op "
1736 "operation at offset %d. Aborting.\n",
1737 i - num_private_stats);
1742 rc = lprocfs_register_stats(obd->obd_proc_entry, "md_stats", stats);
1744 lprocfs_free_stats(&stats);
1746 obd->obd_md_stats = stats;
1747 obd->obd_md_cntr_base = num_private_stats;
1752 EXPORT_SYMBOL(lprocfs_alloc_md_stats);
1754 void lprocfs_free_md_stats(struct obd_device *obd)
1756 struct lprocfs_stats *stats = obd->obd_md_stats;
1758 if (stats != NULL) {
1759 obd->obd_md_stats = NULL;
1760 obd->obd_md_cntr_base = 0;
1761 lprocfs_free_stats(&stats);
1764 EXPORT_SYMBOL(lprocfs_free_md_stats);
1766 void lprocfs_init_ldlm_stats(struct lprocfs_stats *ldlm_stats)
1768 lprocfs_counter_init(ldlm_stats,
1769 LDLM_ENQUEUE - LDLM_FIRST_OPC,
1770 0, "ldlm_enqueue", "reqs");
1771 lprocfs_counter_init(ldlm_stats,
1772 LDLM_CONVERT - LDLM_FIRST_OPC,
1773 0, "ldlm_convert", "reqs");
1774 lprocfs_counter_init(ldlm_stats,
1775 LDLM_CANCEL - LDLM_FIRST_OPC,
1776 0, "ldlm_cancel", "reqs");
1777 lprocfs_counter_init(ldlm_stats,
1778 LDLM_BL_CALLBACK - LDLM_FIRST_OPC,
1779 0, "ldlm_bl_callback", "reqs");
1780 lprocfs_counter_init(ldlm_stats,
1781 LDLM_CP_CALLBACK - LDLM_FIRST_OPC,
1782 0, "ldlm_cp_callback", "reqs");
1783 lprocfs_counter_init(ldlm_stats,
1784 LDLM_GL_CALLBACK - LDLM_FIRST_OPC,
1785 0, "ldlm_gl_callback", "reqs");
1787 EXPORT_SYMBOL(lprocfs_init_ldlm_stats);
1789 __s64 lprocfs_read_helper(struct lprocfs_counter *lc,
1790 struct lprocfs_counter_header *header,
1791 enum lprocfs_stats_flags flags,
1792 enum lprocfs_fields_flags field)
1796 if (lc == NULL || header == NULL)
1800 case LPROCFS_FIELDS_FLAGS_CONFIG:
1801 ret = header->lc_config;
1803 case LPROCFS_FIELDS_FLAGS_SUM:
1805 if ((flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
1806 ret += lc->lc_sum_irq;
1808 case LPROCFS_FIELDS_FLAGS_MIN:
1811 case LPROCFS_FIELDS_FLAGS_MAX:
1814 case LPROCFS_FIELDS_FLAGS_AVG:
1815 ret = (lc->lc_max - lc->lc_min) / 2;
1817 case LPROCFS_FIELDS_FLAGS_SUMSQUARE:
1818 ret = lc->lc_sumsquare;
1820 case LPROCFS_FIELDS_FLAGS_COUNT:
1828 EXPORT_SYMBOL(lprocfs_read_helper);
1830 int lprocfs_read_frac_helper(char *buffer, unsigned long count, long val,
1833 long decimal_val, frac_val;
1839 decimal_val = val / mult;
1840 prtn = snprintf(buffer, count, "%ld", decimal_val);
1841 frac_val = val % mult;
1843 if (prtn < (count - 4) && frac_val > 0) {
1845 int i, temp_mult = 1, frac_bits = 0;
1847 temp_frac = frac_val * 10;
1848 buffer[prtn++] = '.';
1849 while (frac_bits < 2 && (temp_frac / mult) < 1 ) {
1850 /* only reserved 2 bits fraction */
1851 buffer[prtn++] ='0';
1856 * Need to think these cases :
1857 * 1. #echo x.00 > /proc/xxx output result : x
1858 * 2. #echo x.0x > /proc/xxx output result : x.0x
1859 * 3. #echo x.x0 > /proc/xxx output result : x.x
1860 * 4. #echo x.xx > /proc/xxx output result : x.xx
1861 * Only reserved 2 bits fraction.
1863 for (i = 0; i < (5 - prtn); i++)
1866 frac_bits = min((int)count - prtn, 3 - frac_bits);
1867 prtn += snprintf(buffer + prtn, frac_bits, "%ld",
1868 frac_val * temp_mult / mult);
1871 while(buffer[prtn] < '1' || buffer[prtn] > '9') {
1873 if (buffer[prtn] == '.') {
1880 buffer[prtn++] ='\n';
1883 EXPORT_SYMBOL(lprocfs_read_frac_helper);
1885 int lprocfs_seq_read_frac_helper(struct seq_file *m, long val, int mult)
1887 long decimal_val, frac_val;
1889 decimal_val = val / mult;
1890 seq_printf(m, "%ld", decimal_val);
1891 frac_val = val % mult;
1898 /* Three cases: x0, xx, 0x */
1899 if ((frac_val % 10) != 0)
1900 seq_printf(m, ".%ld", frac_val);
1902 seq_printf(m, ".%ld", frac_val / 10);
1905 seq_printf(m, "\n");
1908 EXPORT_SYMBOL(lprocfs_seq_read_frac_helper);
1910 /* Obtains the conversion factor for the unit specified */
1911 static int get_mult(char unit, __u64 *mult)
1916 /* peta, tera, giga, mega, and kilo */
1933 /* some tests expect % to be accepted */
1947 * Ensures the numeric string is valid. The function provides the final
1948 * multiplier in the case a unit exists at the end of the string. It also
1949 * locates the start of the whole and fractional parts (if any). This
1950 * function modifies the string so kstrtoull can be used to parse both
1951 * the whole and fraction portions. This function also figures out
1952 * the base of the number.
1954 static int preprocess_numeric_str(char *buffer, __u64 *mult, __u64 def_mult,
1955 bool allow_units, char **whole, char **frac,
1958 bool hit_decimal = false;
1959 bool hit_unit = false;
1967 /* a hex string if it starts with "0x" */
1968 if (buffer[0] == '0' && tolower(buffer[1]) == 'x') {
1976 /* allow for a single new line before the null terminator */
1977 if (*buffer == '\n') {
1987 /* any chars after our unit indicates a malformed string */
1991 /* ensure we only hit one decimal */
1992 if (*buffer == '.') {
1996 /* if past start, there's a whole part */
1997 if (start != buffer)
2003 } else if (!isdigit(*buffer) &&
2004 !(*base == 16 && isxdigit(*buffer))) {
2006 /* if we allow units, attempt to get mult */
2008 rc = get_mult(*buffer, mult);
2012 /* string stops here, but keep processing */
2024 /* hit a decimal, make sure there's a fractional part */
2030 /* didn't hit a decimal, but may have a whole part */
2031 if (start != buffer && *start)
2035 /* malformed string if we didn't get anything */
2036 if (!*frac && !*whole)
2043 * Parses a numeric string which can contain a whole and fraction portion
2044 * into a __u64. Accepts a multiplier to apply to the value parsed. Also
2045 * allows the string to have a unit at the end. The function handles
2046 * wrapping of the final unsigned value.
2048 static int str_to_u64_parse(char *buffer, unsigned long count,
2049 __u64 *val, __u64 def_mult, bool allow_units)
2053 unsigned int frac_d = 1;
2054 __u64 wrap_indicator = ULLONG_MAX;
2059 unsigned int base = 10;
2061 rc = preprocess_numeric_str(buffer, &mult, def_mult, allow_units,
2062 &strwhole, &strfrac, &base);
2072 /* the multiplier limits how large the value can be */
2073 wrap_indicator /= mult;
2076 rc = kstrtoull(strwhole, base, &whole);
2080 if (whole > wrap_indicator)
2087 if (strlen(strfrac) > 10)
2090 rc = kstrtoull(strfrac, base, &frac);
2094 /* determine power of fractional portion */
2100 /* fractional portion is too large to perform calculation */
2101 if (frac > wrap_indicator)
2105 do_div(frac, frac_d);
2108 /* check that the sum of whole and fraction fits in u64 */
2109 if (whole > (ULLONG_MAX - frac))
2112 *val = whole + frac;
2118 * This function parses numeric/hex strings into __s64. It accepts a multiplier
2119 * which will apply to the value parsed. It also can allow the string to
2120 * have a unit as the last character. The function handles overflow/underflow
2121 * of the signed integer.
2123 static int str_to_s64_internal(const char __user *buffer, unsigned long count,
2124 __s64 *val, __u64 def_mult, bool allow_units)
2128 unsigned int offset = 0;
2129 int signed sign = 1;
2130 __u64 max = LLONG_MAX;
2133 if (count > (sizeof(kernbuf) - 1))
2136 if (copy_from_user(kernbuf, buffer, count))
2139 kernbuf[count] = '\0';
2141 /* keep track of our sign */
2142 if (*kernbuf == '-') {
2145 /* equivalent to max = -LLONG_MIN, avoids overflow */
2149 rc = str_to_u64_parse(kernbuf + offset, count - offset,
2150 &tmp, def_mult, allow_units);
2154 /* check for overflow/underflow */
2158 *val = (__s64)tmp * sign;
2164 * Convert a user string into a signed 64 bit number. This function produces
2165 * an error when the value parsed from the string underflows or
2166 * overflows. This function accepts strings which contain digits and
2167 * optionally a decimal or hex strings which are prefixed with "0x".
2169 * \param[in] buffer string consisting of numbers and optionally a decimal
2170 * \param[in] count buffer length
2171 * \param[in] val if successful, the value represented by the string
2173 * \retval 0 on success
2174 * \retval negative number on error
2176 int lprocfs_str_to_s64(const char __user *buffer, unsigned long count,
2179 return str_to_s64_internal(buffer, count, val, 1, false);
2181 EXPORT_SYMBOL(lprocfs_str_to_s64);
2184 * Convert a user string into a signed 64 bit number. This function produces
2185 * an error when the value parsed from the string times multiplier underflows or
2186 * overflows. This function only accepts strings that contains digits, an
2187 * optional decimal, and a char representing a unit at the end. If a unit is
2188 * specified in the string, the multiplier provided by the caller is ignored.
2189 * This function can also accept hexadecimal strings which are prefixed with
2192 * \param[in] buffer string consisting of numbers, a decimal, and a unit
2193 * \param[in] count buffer length
2194 * \param[in] val if successful, the value represented by the string
2195 * \param[in] defunit default unit if string doesn't contain one
2197 * \retval 0 on success
2198 * \retval negative number on error
2200 int lprocfs_str_with_units_to_s64(const char __user *buffer,
2201 unsigned long count, __s64 *val, char defunit)
2206 if (defunit != '1') {
2207 rc = get_mult(defunit, &mult);
2212 return str_to_s64_internal(buffer, count, val, mult, true);
2214 EXPORT_SYMBOL(lprocfs_str_with_units_to_s64);
2216 static char *lprocfs_strnstr(const char *s1, const char *s2, size_t len)
2225 if (!memcmp(s1, s2, l2))
2233 * Find the string \a name in the input \a buffer, and return a pointer to the
2234 * value immediately following \a name, reducing \a count appropriately.
2235 * If \a name is not found the original \a buffer is returned.
2237 char *lprocfs_find_named_value(const char *buffer, const char *name,
2241 size_t buflen = *count;
2243 /* there is no strnstr() in rhel5 and ubuntu kernels */
2244 val = lprocfs_strnstr(buffer, name, buflen);
2246 return (char *)buffer;
2248 val += strlen(name); /* skip prefix */
2249 while (val < buffer + buflen && isspace(*val)) /* skip separator */
2253 while (val < buffer + buflen && isalnum(*val)) {
2258 return val - *count;
2260 EXPORT_SYMBOL(lprocfs_find_named_value);
2262 int ldebugfs_seq_create(struct dentry *parent, const char *name, umode_t mode,
2263 const struct file_operations *seq_fops, void *data)
2265 struct dentry *entry;
2267 /* Disallow secretly (un)writable entries. */
2268 LASSERT((!seq_fops->write) == (!(mode & 0222)));
2270 entry = debugfs_create_file(name, mode, parent, data, seq_fops);
2271 if (IS_ERR_OR_NULL(entry))
2272 return entry ? PTR_ERR(entry) : -ENOMEM;
2276 EXPORT_SYMBOL_GPL(ldebugfs_seq_create);
2278 int lprocfs_seq_create(struct proc_dir_entry *parent,
2281 const struct file_operations *seq_fops,
2284 struct proc_dir_entry *entry;
2287 /* Disallow secretly (un)writable entries. */
2288 LASSERT((seq_fops->write == NULL) == ((mode & 0222) == 0));
2290 entry = proc_create_data(name, mode, parent, seq_fops, data);
2297 EXPORT_SYMBOL(lprocfs_seq_create);
2299 int lprocfs_obd_seq_create(struct obd_device *dev,
2302 const struct file_operations *seq_fops,
2305 return (lprocfs_seq_create(dev->obd_proc_entry, name,
2306 mode, seq_fops, data));
2308 EXPORT_SYMBOL(lprocfs_obd_seq_create);
2310 void lprocfs_oh_tally(struct obd_histogram *oh, unsigned int value)
2312 if (value >= OBD_HIST_MAX)
2313 value = OBD_HIST_MAX - 1;
2315 spin_lock(&oh->oh_lock);
2316 oh->oh_buckets[value]++;
2317 spin_unlock(&oh->oh_lock);
2319 EXPORT_SYMBOL(lprocfs_oh_tally);
2321 void lprocfs_oh_tally_log2(struct obd_histogram *oh, unsigned int value)
2323 unsigned int val = 0;
2325 if (likely(value != 0))
2326 val = min(fls(value - 1), OBD_HIST_MAX);
2328 lprocfs_oh_tally(oh, val);
2330 EXPORT_SYMBOL(lprocfs_oh_tally_log2);
2332 unsigned long lprocfs_oh_sum(struct obd_histogram *oh)
2334 unsigned long ret = 0;
2337 for (i = 0; i < OBD_HIST_MAX; i++)
2338 ret += oh->oh_buckets[i];
2341 EXPORT_SYMBOL(lprocfs_oh_sum);
2343 void lprocfs_oh_clear(struct obd_histogram *oh)
2345 spin_lock(&oh->oh_lock);
2346 memset(oh->oh_buckets, 0, sizeof(oh->oh_buckets));
2347 spin_unlock(&oh->oh_lock);
2349 EXPORT_SYMBOL(lprocfs_oh_clear);
2351 ssize_t lustre_attr_show(struct kobject *kobj,
2352 struct attribute *attr, char *buf)
2354 struct lustre_attr *a = container_of(attr, struct lustre_attr, attr);
2356 return a->show ? a->show(kobj, attr, buf) : 0;
2358 EXPORT_SYMBOL_GPL(lustre_attr_show);
2360 ssize_t lustre_attr_store(struct kobject *kobj, struct attribute *attr,
2361 const char *buf, size_t len)
2363 struct lustre_attr *a = container_of(attr, struct lustre_attr, attr);
2365 return a->store ? a->store(kobj, attr, buf, len) : len;
2367 EXPORT_SYMBOL_GPL(lustre_attr_store);
2369 const struct sysfs_ops lustre_sysfs_ops = {
2370 .show = lustre_attr_show,
2371 .store = lustre_attr_store,
2373 EXPORT_SYMBOL_GPL(lustre_sysfs_ops);
2375 int lprocfs_obd_max_pages_per_rpc_seq_show(struct seq_file *m, void *data)
2377 struct obd_device *dev = data;
2378 struct client_obd *cli = &dev->u.cli;
2380 spin_lock(&cli->cl_loi_list_lock);
2381 seq_printf(m, "%d\n", cli->cl_max_pages_per_rpc);
2382 spin_unlock(&cli->cl_loi_list_lock);
2385 EXPORT_SYMBOL(lprocfs_obd_max_pages_per_rpc_seq_show);
2387 ssize_t lprocfs_obd_max_pages_per_rpc_seq_write(struct file *file,
2388 const char __user *buffer,
2389 size_t count, loff_t *off)
2391 struct obd_device *dev =
2392 ((struct seq_file *)file->private_data)->private;
2393 struct client_obd *cli = &dev->u.cli;
2394 struct obd_connect_data *ocd = &cli->cl_import->imp_connect_data;
2398 rc = lprocfs_str_with_units_to_s64(buffer, count, &val, '1');
2404 /* if the max_pages is specified in bytes, convert to pages */
2405 if (val >= ONE_MB_BRW_SIZE)
2408 LPROCFS_CLIMP_CHECK(dev);
2410 chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_SHIFT)) - 1);
2411 /* max_pages_per_rpc must be chunk aligned */
2412 val = (val + ~chunk_mask) & chunk_mask;
2413 if (val == 0 || (ocd->ocd_brw_size != 0 &&
2414 val > ocd->ocd_brw_size >> PAGE_SHIFT)) {
2415 LPROCFS_CLIMP_EXIT(dev);
2418 spin_lock(&cli->cl_loi_list_lock);
2419 cli->cl_max_pages_per_rpc = val;
2420 client_adjust_max_dirty(cli);
2421 spin_unlock(&cli->cl_loi_list_lock);
2423 LPROCFS_CLIMP_EXIT(dev);
2426 EXPORT_SYMBOL(lprocfs_obd_max_pages_per_rpc_seq_write);
2428 int lprocfs_wr_root_squash(const char __user *buffer, unsigned long count,
2429 struct root_squash_info *squash, char *name)
2432 char kernbuf[64], *tmp, *errmsg;
2433 unsigned long uid, gid;
2436 if (count >= sizeof(kernbuf)) {
2437 errmsg = "string too long";
2438 GOTO(failed_noprint, rc = -EINVAL);
2440 if (copy_from_user(kernbuf, buffer, count)) {
2441 errmsg = "bad address";
2442 GOTO(failed_noprint, rc = -EFAULT);
2444 kernbuf[count] = '\0';
2446 /* look for uid gid separator */
2447 tmp = strchr(kernbuf, ':');
2449 errmsg = "needs uid:gid format";
2450 GOTO(failed, rc = -EINVAL);
2456 if (kstrtoul(kernbuf, 0, &uid) != 0) {
2458 GOTO(failed, rc = -EINVAL);
2462 if (kstrtoul(tmp, 0, &gid) != 0) {
2464 GOTO(failed, rc = -EINVAL);
2467 squash->rsi_uid = uid;
2468 squash->rsi_gid = gid;
2470 LCONSOLE_INFO("%s: root_squash is set to %u:%u\n",
2471 name, squash->rsi_uid, squash->rsi_gid);
2479 CWARN("%s: failed to set root_squash to \"%s\", %s, rc = %d\n",
2480 name, kernbuf, errmsg, rc);
2483 CWARN("%s: failed to set root_squash due to %s, rc = %d\n",
2487 EXPORT_SYMBOL(lprocfs_wr_root_squash);
2490 int lprocfs_wr_nosquash_nids(const char __user *buffer, unsigned long count,
2491 struct root_squash_info *squash, char *name)
2494 char *kernbuf = NULL;
2496 struct list_head tmp;
2501 errmsg = "string too long";
2502 GOTO(failed, rc = -EINVAL);
2505 OBD_ALLOC(kernbuf, count + 1);
2506 if (kernbuf == NULL) {
2507 errmsg = "no memory";
2508 GOTO(failed, rc = -ENOMEM);
2510 if (copy_from_user(kernbuf, buffer, count)) {
2511 errmsg = "bad address";
2512 GOTO(failed, rc = -EFAULT);
2514 kernbuf[count] = '\0';
2516 if (count > 0 && kernbuf[count - 1] == '\n')
2519 if ((len == 4 && strncmp(kernbuf, "NONE", len) == 0) ||
2520 (len == 5 && strncmp(kernbuf, "clear", len) == 0)) {
2521 /* empty string is special case */
2522 down_write(&squash->rsi_sem);
2523 if (!list_empty(&squash->rsi_nosquash_nids))
2524 cfs_free_nidlist(&squash->rsi_nosquash_nids);
2525 up_write(&squash->rsi_sem);
2526 LCONSOLE_INFO("%s: nosquash_nids is cleared\n", name);
2527 OBD_FREE(kernbuf, count + 1);
2531 INIT_LIST_HEAD(&tmp);
2532 if (cfs_parse_nidlist(kernbuf, count, &tmp) <= 0) {
2533 errmsg = "can't parse";
2534 GOTO(failed, rc = -EINVAL);
2536 LCONSOLE_INFO("%s: nosquash_nids set to %s\n",
2538 OBD_FREE(kernbuf, count + 1);
2541 down_write(&squash->rsi_sem);
2542 if (!list_empty(&squash->rsi_nosquash_nids))
2543 cfs_free_nidlist(&squash->rsi_nosquash_nids);
2544 list_splice(&tmp, &squash->rsi_nosquash_nids);
2545 up_write(&squash->rsi_sem);
2551 CWARN("%s: failed to set nosquash_nids to \"%s\", %s rc = %d\n",
2552 name, kernbuf, errmsg, rc);
2553 OBD_FREE(kernbuf, count + 1);
2555 CWARN("%s: failed to set nosquash_nids due to %s rc = %d\n",
2560 EXPORT_SYMBOL(lprocfs_wr_nosquash_nids);
2562 #endif /* CONFIG_PROC_FS*/