/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * lustre/lvfs/lvfs_lib.c
- * Lustre filesystem abstraction routines
+ * GPL HEADER START
*
- * Copyright (C) 2007 Cluster File Systems, Inc.
- * Author: Andreas Dilger <adilger@clusterfs.com>
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * This file is part of Lustre, http://www.lustre.org.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
*
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
*
- * Lustre is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/lvfs/lvfs_lib.c
+ *
+ * Lustre filesystem abstraction routines
+ *
+ * Author: Andreas Dilger <adilger@clusterfs.com>
*/
#ifdef __KERNEL__
#include <linux/module.h>
#include <lustre_lib.h>
#include <lprocfs_status.h>
+__u64 obd_max_pages = 0;
+__u64 obd_max_alloc = 0;
+
+#ifdef __KERNEL__
+struct lprocfs_stats *obd_memory = NULL;
+spinlock_t obd_updatemax_lock = SPIN_LOCK_UNLOCKED;
+/* refine later and change to seqlock or simlar from libcfs */
+#else
+__u64 obd_alloc;
+__u64 obd_pages;
+#endif
+
unsigned int obd_fail_val = 0;
-unsigned long obd_fail_loc = 0;
+unsigned int obd_fail_loc = 0;
unsigned int obd_alloc_fail_rate = 0;
int obd_alloc_fail(const void *ptr, const char *name, const char *type,
obd_memory_sum(),
obd_pages_sum() << CFS_PAGE_SHIFT,
obd_pages_sum(),
- atomic_read(&libcfs_kmemory));
- return 1;
+ atomic_read(&libcfs_kmemory));
+ return 1;
}
return 0;
}
EXPORT_SYMBOL(obd_alloc_fail);
-int __obd_fail_check_set(__u32 id, __u32 value, int set)
+#ifdef __KERNEL__
+void obd_update_maxusage()
{
- static atomic_t obd_fail_count = ATOMIC_INIT(0);
+ __u64 max1, max2;
- LASSERT(!(id & OBD_FAIL_ONCE));
+ max1 = obd_pages_sum();
+ max2 = obd_memory_sum();
- if ((obd_fail_loc & (OBD_FAILED | OBD_FAIL_ONCE)) ==
- (OBD_FAILED | OBD_FAIL_ONCE)) {
- atomic_set(&obd_fail_count, 0); /* paranoia */
- return 0;
- }
+ spin_lock(&obd_updatemax_lock);
+ if (max1 > obd_max_pages)
+ obd_max_pages = max1;
+ if (max2 > obd_max_alloc)
+ obd_max_alloc = max2;
+ spin_unlock(&obd_updatemax_lock);
+}
- /* Fail 1/obd_fail_val times */
- if (obd_fail_loc & OBD_FAIL_RAND) {
- if (obd_fail_val < 2 || ll_rand() % obd_fail_val > 0)
- return 0;
- }
+__u64 obd_memory_max(void)
+{
+ __u64 ret;
- /* Skip the first obd_fail_val, then fail */
- if (obd_fail_loc & OBD_FAIL_SKIP) {
- if (atomic_inc_return(&obd_fail_count) <= obd_fail_val)
- return 0;
- }
+ spin_lock(&obd_updatemax_lock);
+ ret = obd_max_alloc;
+ spin_unlock(&obd_updatemax_lock);
- /* Fail obd_fail_val times, overridden by FAIL_ONCE */
- if (obd_fail_loc & OBD_FAIL_SOME &&
- (!(obd_fail_loc & OBD_FAIL_ONCE) || obd_fail_val <= 1)) {
- int count = atomic_inc_return(&obd_fail_count);
+ return ret;
+}
- if (count >= obd_fail_val) {
- set_bit(OBD_FAIL_ONCE_BIT, &obd_fail_loc);
- atomic_set(&obd_fail_count, 0);
- /* we are lost race to increase obd_fail_count */
- if (count > obd_fail_val)
- return 0;
- }
- }
+__u64 obd_pages_max(void)
+{
+ __u64 ret;
- if ((set == OBD_FAIL_LOC_ORSET || set == OBD_FAIL_LOC_RESET) &&
- (value & OBD_FAIL_ONCE))
- set_bit(OBD_FAIL_ONCE_BIT, &obd_fail_loc);
+ spin_lock(&obd_updatemax_lock);
+ ret = obd_max_pages;
+ spin_unlock(&obd_updatemax_lock);
- /* Lost race to set OBD_FAILED_BIT. */
- if (test_and_set_bit(OBD_FAILED_BIT, &obd_fail_loc)) {
- /* If OBD_FAIL_ONCE is valid, only one process can fail,
- * otherwise multi-process can fail at the same time. */
- if (obd_fail_loc & OBD_FAIL_ONCE)
- return 0;
- }
+ return ret;
+}
- switch (set) {
- case OBD_FAIL_LOC_NOSET:
- break;
- case OBD_FAIL_LOC_ORSET:
- obd_fail_loc |= value & ~(OBD_FAILED | OBD_FAIL_ONCE);
- break;
- case OBD_FAIL_LOC_RESET:
- obd_fail_loc = value;
- break;
- default:
- LASSERTF(0, "called with bad set %u\n", set);
- break;
- }
+EXPORT_SYMBOL(obd_update_maxusage);
+EXPORT_SYMBOL(obd_pages_max);
+EXPORT_SYMBOL(obd_memory_max);
+EXPORT_SYMBOL(obd_memory);
- return 1;
-}
-EXPORT_SYMBOL(__obd_fail_check_set);
+#endif
#ifdef LPROCFS
+__s64 lprocfs_read_helper(struct lprocfs_counter *lc,
+ enum lprocfs_fields_flags field)
+{
+ __s64 ret = 0;
+ int centry;
+
+ if (!lc)
+ RETURN(0);
+ do {
+ centry = atomic_read(&lc->lc_cntl.la_entry);
+
+ switch (field) {
+ case LPROCFS_FIELDS_FLAGS_CONFIG:
+ ret = lc->lc_config;
+ break;
+ case LPROCFS_FIELDS_FLAGS_SUM:
+ ret = lc->lc_sum + lc->lc_sum_irq;
+ break;
+ case LPROCFS_FIELDS_FLAGS_MIN:
+ ret = lc->lc_min;
+ break;
+ case LPROCFS_FIELDS_FLAGS_MAX:
+ ret = lc->lc_max;
+ break;
+ case LPROCFS_FIELDS_FLAGS_AVG:
+ ret = (lc->lc_max - lc->lc_min)/2;
+ break;
+ case LPROCFS_FIELDS_FLAGS_SUMSQUARE:
+ ret = lc->lc_sumsquare;
+ break;
+ case LPROCFS_FIELDS_FLAGS_COUNT:
+ ret = lc->lc_count;
+ break;
+ default:
+ break;
+ };
+ } while (centry != atomic_read(&lc->lc_cntl.la_entry) &&
+ centry != atomic_read(&lc->lc_cntl.la_exit));
+
+ RETURN(ret);
+}
+EXPORT_SYMBOL(lprocfs_read_helper);
+
void lprocfs_counter_add(struct lprocfs_stats *stats, int idx,
long amount)
{
percpu_cntr->lc_count++;
if (percpu_cntr->lc_config & LPROCFS_CNTR_AVGMINMAX) {
+ /* see comment in lprocfs_counter_sub */
+ LASSERT(!cfs_in_interrupt());
+
percpu_cntr->lc_sum += amount;
if (percpu_cntr->lc_config & LPROCFS_CNTR_STDDEV)
- percpu_cntr->lc_sumsquare += (__s64)amount * amount;
+ percpu_cntr->lc_sumsquare += (__u64)amount * amount;
if (amount < percpu_cntr->lc_min)
percpu_cntr->lc_min = amount;
if (amount > percpu_cntr->lc_max)
percpu_cntr = &(stats->ls_percpu[smp_id]->lp_cntr[idx]);
atomic_inc(&percpu_cntr->lc_cntl.la_entry);
- if (percpu_cntr->lc_config & LPROCFS_CNTR_AVGMINMAX)
- percpu_cntr->lc_sum -= amount;
+ if (percpu_cntr->lc_config & LPROCFS_CNTR_AVGMINMAX) {
+ /*
+ * currently lprocfs_count_add() can only be called in thread
+ * context; sometimes we use RCU callbacks to free memory
+ * which calls lprocfs_counter_sub(), and RCU callbacks may
+ * execute in softirq context - right now that's the only case
+ * we're in softirq context here, use separate counter for that.
+ * bz20650.
+ */
+ if (cfs_in_interrupt())
+ percpu_cntr->lc_sum_irq -= amount;
+ else
+ percpu_cntr->lc_sum -= amount;
+ }
atomic_inc(&percpu_cntr->lc_cntl.la_exit);
lprocfs_stats_unlock(stats);
}
EXPORT_SYMBOL(obd_fail_loc);
EXPORT_SYMBOL(obd_alloc_fail_rate);
EXPORT_SYMBOL(obd_fail_val);
+
+int obd_fail_check(__u32 id)
+{
+ static int count = 0;
+ if (likely((obd_fail_loc & OBD_FAIL_MASK_LOC) !=
+ (id & OBD_FAIL_MASK_LOC)))
+ return 0;
+
+ if ((obd_fail_loc & (OBD_FAILED | OBD_FAIL_ONCE)) ==
+ (OBD_FAILED | OBD_FAIL_ONCE)) {
+ count = 0; /* paranoia */
+ return 0;
+ }
+
+ if (obd_fail_loc & OBD_FAIL_RAND) {
+ if (obd_fail_val < 2)
+ return 0;
+ if (ll_rand() % obd_fail_val > 0)
+ return 0;
+ }
+
+ if (obd_fail_loc & OBD_FAIL_SKIP) {
+ count++;
+ if (count < obd_fail_val)
+ return 0;
+ count = 0;
+ }
+
+ /* Overridden by FAIL_ONCE */
+ if (obd_fail_loc & OBD_FAIL_SOME) {
+ count++;
+ if (count >= obd_fail_val) {
+ count = 0;
+ /* Don't fail anymore */
+ obd_fail_loc |= OBD_FAIL_ONCE;
+ }
+ }
+
+ obd_fail_loc |= OBD_FAILED;
+ /* Handle old checks that OR in this */
+ if (id & OBD_FAIL_ONCE)
+ obd_fail_loc |= OBD_FAIL_ONCE;
+
+ return 1;
+}
+EXPORT_SYMBOL(obd_fail_check);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff