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| author | Dave Chinner <dchinner@redhat.com> | 2012-11-12 22:54:02 +1100 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2012-11-15 21:34:05 -0600 |
| commit | eab4e63368b4cfa597dbdac66d1a7a836a693b7d (patch) | |
| tree | 37d6756a3fd9e43ecf65d1b4a3950ecd34ad653f /fs/xfs | |
| parent | c3f8fc73ac97b76a12692088ef9cace9af8422c0 (diff) | |
| download | linux-3.10-eab4e63368b4cfa597dbdac66d1a7a836a693b7d.tar.gz linux-3.10-eab4e63368b4cfa597dbdac66d1a7a836a693b7d.tar.bz2 linux-3.10-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')
| -rw-r--r-- | fs/xfs/xfs_buf.c | 9 | ||||
| -rw-r--r-- | fs/xfs/xfs_fsops.c | 5 | ||||
| -rw-r--r-- | fs/xfs/xfs_mount.c | 6 | ||||
| -rw-r--r-- | fs/xfs/xfs_rtalloc.c | 9 |
4 files changed, 21 insertions, 8 deletions
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c index 0298dd68479..fbc965fc075 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; } diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index 5440768ec41..f35f8d7731f 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -171,6 +171,11 @@ xfs_growfs_data_private( XFS_FSS_TO_BB(mp, 1), 0, NULL); if (!bp) return EIO; + if (bp->b_error) { + int error = bp->b_error; + xfs_buf_relse(bp); + return error; + } xfs_buf_relse(bp); new = nb; /* use new as a temporary here */ diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index d5402b0eb6a..df6d0b2aade 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -658,6 +658,12 @@ reread: xfs_warn(mp, "SB buffer read failed"); return EIO; } + if (bp->b_error) { + error = bp->b_error; + if (loud) + xfs_warn(mp, "SB validate failed"); + goto release_buf; + } /* * Initialize the mount structure from the superblock. diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c index b271ed939d7..98dc670d3ee 100644 --- a/fs/xfs/xfs_rtalloc.c +++ b/fs/xfs/xfs_rtalloc.c @@ -1876,6 +1876,11 @@ xfs_growfs_rt( XFS_FSB_TO_BB(mp, 1), 0, NULL); if (!bp) return EIO; + if (bp->b_error) { + error = bp->b_error; + xfs_buf_relse(bp); + return error; + } xfs_buf_relse(bp); /* @@ -2221,8 +2226,10 @@ xfs_rtmount_init( bp = xfs_buf_read_uncached(mp->m_rtdev_targp, d - XFS_FSB_TO_BB(mp, 1), XFS_FSB_TO_BB(mp, 1), 0, NULL); - if (!bp) { + if (!bp || bp->b_error) { xfs_warn(mp, "realtime device size check failed"); + if (bp) + xfs_buf_relse(bp); return EIO; } xfs_buf_relse(bp); |