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) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
31 * This file is part of Lustre, http://www.lustre.org/
32 * Lustre is a trademark of Sun Microsystems, Inc.
34 * lustre/lvfs/lvfs_lib.c
36 * Lustre filesystem abstraction routines
38 * Author: Andreas Dilger <adilger@clusterfs.com>
41 #include <linux/module.h>
43 #include <liblustre.h>
45 #include <lustre_lib.h>
46 #include <lprocfs_status.h>
48 unsigned int obd_alloc_fail_rate = 0;
50 int obd_alloc_fail(const void *ptr, const char *name, const char *type,
51 size_t size, const char *file, int line)
54 (cfs_rand() & OBD_ALLOC_FAIL_MASK) < obd_alloc_fail_rate) {
55 CERROR("%s%salloc of %s ("LPU64" bytes) failed at %s:%d\n",
56 ptr ? "force " :"", type, name, (__u64)size, file,
58 CERROR(LPU64" total bytes and "LPU64" total pages "
59 "("LPU64" bytes) allocated by Lustre, "
60 "%d total bytes by LNET\n",
62 obd_pages_sum() << CFS_PAGE_SHIFT,
64 cfs_atomic_read(&libcfs_kmemory));
69 EXPORT_SYMBOL(obd_alloc_fail);
72 void lprocfs_counter_add(struct lprocfs_stats *stats, int idx,
75 struct lprocfs_counter *percpu_cntr;
77 unsigned long flags = 0;
82 /* With per-client stats, statistics are allocated only for
83 * single CPU area, so the smp_id should be 0 always. */
84 smp_id = lprocfs_stats_lock(stats, LPROCFS_GET_SMP_ID, &flags);
88 percpu_cntr = &(stats->ls_percpu[smp_id]->lp_cntr[idx]);
89 if (!(stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU))
90 cfs_atomic_inc(&percpu_cntr->lc_cntl.la_entry);
91 percpu_cntr->lc_count++;
93 if (percpu_cntr->lc_config & LPROCFS_CNTR_AVGMINMAX) {
95 * lprocfs_counter_add() can be called in interrupt context,
96 * as memory allocation could trigger memory shrinker call
97 * ldlm_pool_shrink(), which calls lprocfs_counter_add().
100 if (cfs_in_interrupt())
101 percpu_cntr->lc_sum_irq += amount;
103 percpu_cntr->lc_sum += amount;
104 if (percpu_cntr->lc_config & LPROCFS_CNTR_STDDEV)
105 percpu_cntr->lc_sumsquare += (__s64)amount * amount;
106 if (amount < percpu_cntr->lc_min)
107 percpu_cntr->lc_min = amount;
108 if (amount > percpu_cntr->lc_max)
109 percpu_cntr->lc_max = amount;
111 if (!(stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU))
112 cfs_atomic_inc(&percpu_cntr->lc_cntl.la_exit);
113 lprocfs_stats_unlock(stats, LPROCFS_GET_SMP_ID, &flags);
115 EXPORT_SYMBOL(lprocfs_counter_add);
117 void lprocfs_counter_sub(struct lprocfs_stats *stats, int idx, long amount)
119 struct lprocfs_counter *percpu_cntr;
121 unsigned long flags = 0;
126 /* With per-client stats, statistics are allocated only for
127 * single CPU area, so the smp_id should be 0 always. */
128 smp_id = lprocfs_stats_lock(stats, LPROCFS_GET_SMP_ID, &flags);
132 percpu_cntr = &(stats->ls_percpu[smp_id]->lp_cntr[idx]);
133 if (!(stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU))
134 cfs_atomic_inc(&percpu_cntr->lc_cntl.la_entry);
135 if (percpu_cntr->lc_config & LPROCFS_CNTR_AVGMINMAX) {
137 * Sometimes we use RCU callbacks to free memory which calls
138 * lprocfs_counter_sub(), and RCU callbacks may execute in
139 * softirq context - right now that's the only case we're in
140 * softirq context here, use separate counter for that.
143 if (cfs_in_interrupt())
144 percpu_cntr->lc_sum_irq -= amount;
146 percpu_cntr->lc_sum -= amount;
148 if (!(stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU))
149 cfs_atomic_inc(&percpu_cntr->lc_cntl.la_exit);
150 lprocfs_stats_unlock(stats, LPROCFS_GET_SMP_ID, &flags);
152 EXPORT_SYMBOL(lprocfs_counter_sub);
154 int lprocfs_stats_alloc_one(struct lprocfs_stats *stats, unsigned int idx)
156 unsigned int percpusize;
158 unsigned long flags = 0;
160 /* the 1st percpu entry was statically allocated in
161 * lprocfs_alloc_stats() */
162 LASSERT(idx != 0 && stats->ls_percpu[0] != NULL);
163 LASSERT(stats->ls_percpu[idx] == NULL);
164 LASSERT((stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU) == 0);
166 percpusize = CFS_L1_CACHE_ALIGN(offsetof(struct lprocfs_percpu,
167 lp_cntr[stats->ls_num]));
168 OBD_ALLOC_GFP(stats->ls_percpu[idx], percpusize, CFS_ALLOC_ATOMIC);
169 if (stats->ls_percpu[idx] != NULL) {
171 if (unlikely(stats->ls_biggest_alloc_num <= idx)) {
172 if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
173 spin_lock_irqsave(&stats->ls_lock, flags);
175 spin_lock(&stats->ls_lock);
176 if (stats->ls_biggest_alloc_num <= idx)
177 stats->ls_biggest_alloc_num = idx + 1;
178 if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE) {
179 spin_unlock_irqrestore(&stats->ls_lock, flags);
181 spin_unlock(&stats->ls_lock);
185 /* initialize the ls_percpu[idx] by copying the 0th template
187 memcpy(stats->ls_percpu[idx], stats->ls_percpu[0],
193 EXPORT_SYMBOL(lprocfs_stats_alloc_one);
196 EXPORT_SYMBOL(obd_alloc_fail_rate);