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Btrfs: fix wrong error handle when the device is missing or is not writeable 

The original bio might be submitted, so we shoud increase bi_remaining to
account for it when we deal with the error that the device is missing or
is not writeable, or we would skip the endio handle.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Miao Xie 2014-06-19 10:42:55 +08:00 committed by Chris Mason
parent c55f139640
commit 8408c716d7
1 changed files with 15 additions and 7 deletions
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22
fs/btrfs/volumes.c
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@ -5359,6 +5359,15 @@ int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
return 0;
}
static inline void btrfs_end_bbio(struct btrfs_bio *bbio, struct bio *bio, int err)
{
if (likely(bbio->flags & BTRFS_BIO_ORIG_BIO_SUBMITTED))
bio_endio_nodec(bio, err);
else
bio_endio(bio, err);
kfree(bbio);
}
static void btrfs_end_bio(struct bio *bio, int err)
{
struct btrfs_bio *bbio = bio->bi_private;
@ -5416,11 +5425,7 @@ static void btrfs_end_bio(struct bio *bio, int err)
err = 0;
}
if (likely(bbio->flags & BTRFS_BIO_ORIG_BIO_SUBMITTED))
bio_endio_nodec(bio, err);
else
bio_endio(bio, err);
kfree(bbio);
btrfs_end_bbio(bbio, bio, err);
} else if (!is_orig_bio) {
bio_put(bio);
}
@ -5583,12 +5588,15 @@ static void bbio_error(struct btrfs_bio *bbio, struct bio *bio, u64 logical)
{
atomic_inc(&bbio->error);
if (atomic_dec_and_test(&bbio->stripes_pending)) {
/* Shoud be the original bio. */
WARN_ON(bio != bbio->orig_bio);
bio->bi_private = bbio->private;
bio->bi_end_io = bbio->end_io;
btrfs_io_bio(bio)->mirror_num = bbio->mirror_num;
bio->bi_iter.bi_sector = logical >> 9;
kfree(bbio);
bio_endio(bio, -EIO);
btrfs_end_bbio(bbio, bio, -EIO);
}
}