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authorJens Axboe <jens.axboe@oracle.com>2008-09-14 05:56:33 -0700
committerJens Axboe <jens.axboe@oracle.com>2008-10-09 08:56:17 +0200
commit581d4e28d9195aa8b2231383dbabc288988d615e (patch)
tree093bcac9a538ef67edcf91826f7532bdb88e6248 /block/blk.h
parent0a0d96b03a1f3bfd6bc3ea08008699e8e59fccd9 (diff)
downloadlwn-581d4e28d9195aa8b2231383dbabc288988d615e.tar.gz
lwn-581d4e28d9195aa8b2231383dbabc288988d615e.zip
block: add fault injection mechanism for faking request timeouts
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>
Diffstat (limited to 'block/blk.h')
-rw-r--r--block/blk.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/block/blk.h b/block/blk.h
index a4f4a50aefaa..e5c579769963 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -42,6 +42,18 @@ static inline void blk_clear_rq_complete(struct request *rq)
clear_bit(REQ_ATOM_COMPLETE, &rq->atomic_flags);
}
+#ifdef CONFIG_FAIL_IO_TIMEOUT
+int blk_should_fake_timeout(struct request_queue *);
+ssize_t part_timeout_show(struct device *, struct device_attribute *, char *);
+ssize_t part_timeout_store(struct device *, struct device_attribute *,
+ const char *, size_t);
+#else
+static inline int blk_should_fake_timeout(struct request_queue *q)
+{
+ return 0;
+}
+#endif
+
struct io_context *current_io_context(gfp_t gfp_flags, int node);
int ll_back_merge_fn(struct request_queue *q, struct request *req,