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xfs: random buffer write failure errortag

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Introduce an error tag to randomly fail async buffer writes. This is
primarily to facilitate testing of the XFS error configuration
mechanism.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Brian Foster
2020-05-06 13:29:19 -07:00
committed by Darrick J. Wong
parent 88fc187984
commit 7376d74547
3 changed files with 12 additions and 1 deletions
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6
fs/xfs/xfs_buf.c
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@@ -1289,6 +1289,12 @@ xfs_buf_bio_end_io(
struct bio *bio)
{
struct xfs_buf *bp = (struct xfs_buf *)bio->bi_private;
struct xfs_mount *mp = bp->b_mount;
if (!bio->bi_status &&
(bp->b_flags & XBF_WRITE) && (bp->b_flags & XBF_ASYNC) &&
XFS_TEST_ERROR(false, mp, XFS_ERRTAG_BUF_IOERROR))
bio->bi_status = BLK_STS_IOERR;
/*
* don't overwrite existing errors - otherwise we can lose errors on