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| author | NeilBrown <neilb@cse.unsw.edu.au> | 2005-09-09 16:23:41 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-09 16:39:09 -0700 |
| commit | e5dcdd80a60627371f40797426273048630dc8ca (patch) | |
| tree | 1621f68394ceaa4da86d89c6da3b93fd306415fc /drivers/md/multipath.c | |
| parent | 3ec67ac1a399d576d48b0736096bcce7721fe3cf (diff) | |
| download | lwn-e5dcdd80a60627371f40797426273048630dc8ca.tar.gz lwn-e5dcdd80a60627371f40797426273048630dc8ca.zip | |
[PATCH] md: fail IO request to md that require a barrier.
md does not yet support BIO_RW_BARRIER, so be honest about it and fail
(-EOPNOTSUPP) any such requests.
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/md/multipath.c')
| -rw-r--r-- | drivers/md/multipath.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c index 2d2ca7fa0265..286342375fb7 100644 --- a/drivers/md/multipath.c +++ b/drivers/md/multipath.c @@ -169,6 +169,11 @@ static int multipath_make_request (request_queue_t *q, struct bio * bio) struct multipath_bh * mp_bh; struct multipath_info *multipath; + if (unlikely(bio_barrier(bio))) { + bio_endio(bio, bio->bi_size, -EOPNOTSUPP); + return 0; + } + mp_bh = mempool_alloc(conf->pool, GFP_NOIO); mp_bh->master_bio = bio; |