-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see http://www.gnu.org/licenses
*
- * Please contact Oracle Corporation, Inc., 500 Oracle Parkway, Redwood Shores,
- * CA 94065 USA or visit www.oracle.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.
*
- * Copyright (c) 2011, 2012, Whamcloud, Inc.
+ * Copyright (c) 2011, 2014, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
extern unsigned long cfs_fail_loc;
extern unsigned int cfs_fail_val;
+extern int cfs_fail_err;
-extern cfs_waitq_t cfs_race_waitq;
+extern wait_queue_head_t cfs_race_waitq;
extern int cfs_race_state;
int __cfs_fail_check_set(__u32 id, __u32 value, int set);
CFS_FAIL_LOC_VALUE = 3
};
+/* Failure ranges
+ "0x0100 - 0x3fff" for Lustre
+ "0xe000 - 0xefff" for LNet
+ "0xf000 - 0xffff" for LNDs */
/* Failure injection control */
#define CFS_FAIL_MASK_SYS 0x0000FF00
#define CFS_FAIL_MASK_LOC (0x000000FF | CFS_FAIL_MASK_SYS)
#define CFS_FAILED_BIT 30
/* CFS_FAILED is 0x40000000 */
-#define CFS_FAILED (1 << CFS_FAILED_BIT)
+#define CFS_FAILED BIT(CFS_FAILED_BIT)
#define CFS_FAIL_ONCE_BIT 31
/* CFS_FAIL_ONCE is 0x80000000 */
-#define CFS_FAIL_ONCE (1 << CFS_FAIL_ONCE_BIT)
+#define CFS_FAIL_ONCE BIT(CFS_FAIL_ONCE_BIT)
/* The following flags aren't made to be combined */
#define CFS_FAIL_SKIP 0x20000000 /* skip N times then fail */
#define CFS_FAIL_RAND 0x08000000 /* fail 1/N of the times */
#define CFS_FAIL_USR1 0x04000000 /* user flag */
-#define CFS_FAIL_PRECHECK(id) (cfs_fail_loc && \
- (cfs_fail_loc & CFS_FAIL_MASK_LOC) == \
- ((id) & CFS_FAIL_MASK_LOC))
+/* CFS_FAULT may be combined with any one of the above flags. */
+#define CFS_FAULT 0x02000000 /* match any CFS_FAULT_CHECK */
-static inline int cfs_fail_check_set(__u32 id, __u32 value, int set)
+static inline bool CFS_FAIL_PRECHECK(__u32 id)
{
- int ret = 0;
- if (unlikely(CFS_FAIL_PRECHECK(id) &&
- (ret = __cfs_fail_check_set(id, value, set)))) {
- CERROR("*** cfs_fail_loc=%x ***\n", id);
- }
- return ret;
+ return cfs_fail_loc != 0 &&
+ ((cfs_fail_loc & CFS_FAIL_MASK_LOC) == (id & CFS_FAIL_MASK_LOC) ||
+ (cfs_fail_loc & id & CFS_FAULT));
+}
+
+static inline int cfs_fail_check_set(__u32 id, __u32 value,
+ int set, int quiet)
+{
+ int ret = 0;
+
+ if (unlikely(CFS_FAIL_PRECHECK(id) &&
+ (ret = __cfs_fail_check_set(id, value, set)))) {
+ if (quiet) {
+ CDEBUG(D_INFO, "*** cfs_fail_loc=%x, val=%u***\n",
+ id, value);
+ } else {
+ LCONSOLE_INFO("*** cfs_fail_loc=%x, val=%u***\n",
+ id, value);
+ }
+ }
+
+ return ret;
}
/* If id hit cfs_fail_loc, return 1, otherwise return 0 */
#define CFS_FAIL_CHECK(id) \
- cfs_fail_check_set(id, 0, CFS_FAIL_LOC_NOSET)
+ cfs_fail_check_set(id, 0, CFS_FAIL_LOC_NOSET, 0)
+#define CFS_FAIL_CHECK_QUIET(id) \
+ cfs_fail_check_set(id, 0, CFS_FAIL_LOC_NOSET, 1)
/* If id hit cfs_fail_loc and cfs_fail_val == (-1 or value) return 1,
* otherwise return 0 */
#define CFS_FAIL_CHECK_VALUE(id, value) \
- cfs_fail_check_set(id, value, CFS_FAIL_LOC_VALUE)
+ cfs_fail_check_set(id, value, CFS_FAIL_LOC_VALUE, 0)
+#define CFS_FAIL_CHECK_VALUE_QUIET(id, value) \
+ cfs_fail_check_set(id, value, CFS_FAIL_LOC_VALUE, 1)
/* If id hit cfs_fail_loc, cfs_fail_loc |= value and return 1,
* otherwise return 0 */
#define CFS_FAIL_CHECK_ORSET(id, value) \
- cfs_fail_check_set(id, value, CFS_FAIL_LOC_ORSET)
+ cfs_fail_check_set(id, value, CFS_FAIL_LOC_ORSET, 0)
+#define CFS_FAIL_CHECK_ORSET_QUIET(id, value) \
+ cfs_fail_check_set(id, value, CFS_FAIL_LOC_ORSET, 1)
/* If id hit cfs_fail_loc, cfs_fail_loc = value and return 1,
* otherwise return 0 */
#define CFS_FAIL_CHECK_RESET(id, value) \
- cfs_fail_check_set(id, value, CFS_FAIL_LOC_RESET)
+ cfs_fail_check_set(id, value, CFS_FAIL_LOC_RESET, 0)
+#define CFS_FAIL_CHECK_RESET_QUIET(id, value) \
+ cfs_fail_check_set(id, value, CFS_FAIL_LOC_RESET, 1)
static inline int cfs_fail_timeout_set(__u32 id, __u32 value, int ms, int set)
{
/* If id hit cfs_fail_loc, sleep for seconds or milliseconds */
#define CFS_FAIL_TIMEOUT(id, secs) \
- cfs_fail_timeout_set(id, 0, secs * 1000, CFS_FAIL_LOC_NOSET)
+ cfs_fail_timeout_set(id, 0, (secs) * 1000, CFS_FAIL_LOC_NOSET)
#define CFS_FAIL_TIMEOUT_MS(id, ms) \
cfs_fail_timeout_set(id, 0, ms, CFS_FAIL_LOC_NOSET)
/* If id hit cfs_fail_loc, cfs_fail_loc |= value and
* sleep seconds or milliseconds */
#define CFS_FAIL_TIMEOUT_ORSET(id, value, secs) \
- cfs_fail_timeout_set(id, value, secs * 1000, CFS_FAIL_LOC_ORSET)
+ cfs_fail_timeout_set(id, value, (secs) * 1000, CFS_FAIL_LOC_ORSET)
+
+#define CFS_FAIL_TIMEOUT_RESET(id, value, secs) \
+ cfs_fail_timeout_set(id, value, secs * 1000, CFS_FAIL_LOC_RESET)
#define CFS_FAIL_TIMEOUT_MS_ORSET(id, value, ms) \
cfs_fail_timeout_set(id, value, ms, CFS_FAIL_LOC_ORSET)
-#ifdef __KERNEL__
+#define CFS_FAULT_CHECK(id) \
+ CFS_FAIL_CHECK(CFS_FAULT | (id))
+
/* The idea here is to synchronise two threads to force a race. The
* first thread that calls this with a matching fail_loc is put to
* sleep. The next thread that calls with the same fail_loc wakes up
* the first and continues. */
static inline void cfs_race(__u32 id)
{
-
- if (CFS_FAIL_PRECHECK(id)) {
- if (unlikely(__cfs_fail_check_set(id, 0, CFS_FAIL_LOC_NOSET))) {
- int rc;
- cfs_race_state = 0;
- CERROR("cfs_race id %x sleeping\n", id);
- cfs_wait_event_interruptible(cfs_race_waitq,
- cfs_race_state != 0, rc);
- CERROR("cfs_fail_race id %x awake, rc=%d\n", id, rc);
- } else {
- CERROR("cfs_fail_race id %x waking\n", id);
- cfs_race_state = 1;
- cfs_waitq_signal(&cfs_race_waitq);
- }
- }
+ if (CFS_FAIL_PRECHECK(id)) {
+ if (unlikely(__cfs_fail_check_set(id, 0, CFS_FAIL_LOC_NOSET))) {
+ int rc;
+ cfs_race_state = 0;
+ CERROR("cfs_race id %x sleeping\n", id);
+ rc = wait_event_interruptible(cfs_race_waitq,
+ cfs_race_state != 0);
+ CERROR("cfs_fail_race id %x awake: rc=%d\n", id, rc);
+ } else {
+ CERROR("cfs_fail_race id %x waking\n", id);
+ cfs_race_state = 1;
+ wake_up(&cfs_race_waitq);
+ }
+ }
}
#define CFS_RACE(id) cfs_race(id)
-#else
-/* sigh. an expedient fix until CFS_RACE is fixed up */
-#define CFS_RACE(foo) do {} while(0)
-#endif
+
+/**
+ * Wait on race.
+ *
+ * The first thread that calls this with a matching fail_loc is put to sleep,
+ * but subseqent callers of this won't sleep. Until another thread that calls
+ * cfs_race_wakeup(), the first thread will be woken up and continue.
+ */
+static inline void cfs_race_wait(__u32 id)
+{
+ if (CFS_FAIL_PRECHECK(id)) {
+ if (unlikely(__cfs_fail_check_set(id, 0, CFS_FAIL_LOC_NOSET))) {
+ int rc;
+
+ cfs_race_state = 0;
+ CERROR("cfs_race id %x sleeping\n", id);
+ rc = wait_event_interruptible(cfs_race_waitq,
+ cfs_race_state != 0);
+ CERROR("cfs_fail_race id %x awake: rc=%d\n", id, rc);
+ }
+ }
+}
+#define CFS_RACE_WAIT(id) cfs_race_wait(id)
+
+/**
+ * Wake up the thread that is waiting on the matching fail_loc.
+ */
+static inline void cfs_race_wakeup(__u32 id)
+{
+ if (CFS_FAIL_PRECHECK(id)) {
+ if (likely(!__cfs_fail_check_set(id, 0, CFS_FAIL_LOC_NOSET))) {
+ CERROR("cfs_fail_race id %x waking\n", id);
+ cfs_race_state = 1;
+ wake_up(&cfs_race_waitq);
+ }
+ }
+}
+#define CFS_RACE_WAKEUP(id) cfs_race_wakeup(id)
#endif /* _LIBCFS_FAIL_H */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff