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block: add fault injection mechanism for faking request timeouts

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Only works for the generic request timer handling. Allows one to
sporadically ignore request completions, thus exercising the timeout
handling.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe
2008-09-14 05:56:33 -07:00
parent 0a0d96b03a
commit 581d4e28d9
6 changed files with 94 additions and 1 deletions
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include/linux/blkdev.h
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@ -440,6 +440,7 @@ struct request_queue
#define QUEUE_FLAG_BIDI 9 /* queue supports bidi requests */
#define QUEUE_FLAG_NOMERGES 10 /* disable merge attempts */
#define QUEUE_FLAG_SAME_COMP 11 /* force complete on same CPU */
#define QUEUE_FLAG_FAIL_IO 12 /* fake timeout */
static inline int queue_is_locked(struct request_queue *q)
{