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| author | Dave Chinner | 2012-11-12 12:54:02 +0100 |
|---|---|---|
| committer | Ben Myers | 2012-11-16 04:34:05 +0100 |
| commit | eab4e63368b4cfa597dbdac66d1a7a836a693b7d (patch) | |
| tree | 37d6756a3fd9e43ecf65d1b4a3950ecd34ad653f /fs/xfs/xfs_buf.c | |
| parent | xfs: make buffer read verication an IO completion function (diff) | |
| download | kernel-qcow2-linux-eab4e63368b4cfa597dbdac66d1a7a836a693b7d.tar.gz kernel-qcow2-linux-eab4e63368b4cfa597dbdac66d1a7a836a693b7d.tar.xz kernel-qcow2-linux-eab4e63368b4cfa597dbdac66d1a7a836a693b7d.zip | |
xfs: uncached buffer reads need to return an error
With verification being done as an IO completion callback, different
errors can be returned from a read. Uncached reads only return a
buffer or NULL on failure, which means the verification error cannot
be returned to the caller.
Split the error handling for these reads into two - a failure to get
a buffer will still return NULL, but a read error will return a
referenced buffer with b_error set rather than NULL. The caller is
responsible for checking the error state of the buffer returned.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Phil White <pwhite@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_buf.c')
| -rw-r--r-- | fs/xfs/xfs_buf.c | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c index 0298dd684798..fbc965fc075a 100644 --- a/fs/xfs/xfs_buf.c +++ b/fs/xfs/xfs_buf.c @@ -715,8 +715,7 @@ xfs_buf_read_uncached( int flags, xfs_buf_iodone_t verify) { - xfs_buf_t *bp; - int error; + struct xfs_buf *bp; bp = xfs_buf_get_uncached(target, numblks, flags); if (!bp) @@ -730,11 +729,7 @@ xfs_buf_read_uncached( bp->b_iodone = verify; xfsbdstrat(target->bt_mount, bp); - error = xfs_buf_iowait(bp); - if (error) { - xfs_buf_relse(bp); - return NULL; - } + xfs_buf_iowait(bp); return bp; } |