diff options
Diffstat (limited to 'drivers/staging/lustre/include/linux/libcfs/libcfs_fail.h')
| -rw-r--r-- | drivers/staging/lustre/include/linux/libcfs/libcfs_fail.h | 191 |
1 files changed, 0 insertions, 191 deletions
diff --git a/drivers/staging/lustre/include/linux/libcfs/libcfs_fail.h b/drivers/staging/lustre/include/linux/libcfs/libcfs_fail.h deleted file mode 100644 index d6fc3164e7e7..000000000000 --- a/drivers/staging/lustre/include/linux/libcfs/libcfs_fail.h +++ /dev/null @@ -1,191 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * GPL HEADER START - * - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * 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. - * - * 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). - * - * 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 - * - * 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, Intel Corporation. - */ -/* - * This file is part of Lustre, http://www.lustre.org/ - * Lustre is a trademark of Oracle Corporation, Inc. - */ - -#ifndef _LIBCFS_FAIL_H -#define _LIBCFS_FAIL_H - -extern unsigned long cfs_fail_loc; -extern unsigned int cfs_fail_val; -extern int cfs_fail_err; - -extern wait_queue_head_t cfs_race_waitq; -extern int cfs_race_state; - -int __cfs_fail_check_set(u32 id, u32 value, int set); -int __cfs_fail_timeout_set(u32 id, u32 value, int ms, int set); - -enum { - CFS_FAIL_LOC_NOSET = 0, - CFS_FAIL_LOC_ORSET = 1, - CFS_FAIL_LOC_RESET = 2, - CFS_FAIL_LOC_VALUE = 3 -}; - -/* 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 BIT(CFS_FAILED_BIT) - -#define CFS_FAIL_ONCE_BIT 31 -/* CFS_FAIL_ONCE is 0x80000000 */ -#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_SOME 0x10000000 /* only fail N times */ -#define CFS_FAIL_RAND 0x08000000 /* fail 1/N of the times */ -#define CFS_FAIL_USR1 0x04000000 /* user flag */ - -#define CFS_FAULT 0x02000000 /* match any CFS_FAULT_CHECK */ - -static inline bool CFS_FAIL_PRECHECK(u32 id) -{ - return cfs_fail_loc && - ((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 (ret) { - 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, 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, 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, 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, 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 (unlikely(CFS_FAIL_PRECHECK(id))) - return __cfs_fail_timeout_set(id, value, ms, set); - return 0; -} - -/* 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) - -#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) - -#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) - -#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); - rc = wait_event_interruptible(cfs_race_waitq, - !!cfs_race_state); - 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) - -#endif /* _LIBCFS_FAIL_H */ |