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authorDave Chinner <dchinner@redhat.com>2012-11-14 17:52:32 +1100
committerBen Myers <bpm@sgi.com>2012-11-15 21:35:02 -0600
commit612cfbfe174a89d565363fff7f3961a2dda5fb71 (patch)
tree46c44b5965ca17d8e47b1418158b2985ad12359e /fs/xfs/xfs_dquot.c
parentcfb02852226aa449fe27075caffe88726507668c (diff)
xfs: add pre-write metadata buffer verifier callbacks
These verifiers are essentially the same code as the read verifiers, but do not require ioend processing. Hence factor the read verifier functions and add a new write verifier wrapper that is used as the callback. This is done as one large patch for all verifiers rather than one patch per verifier as the change is largely mechanical. This includes hooking up the write verifier via the read verifier function. Hooking up the write verifier for buffers obtained via xfs_trans_get_buf() will be done in a separate patch as that touches code in many different places rather than just the verifier functions. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Mark Tinguely <tinguely@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_dquot.c')
-rw-r--r--fs/xfs/xfs_dquot.c27
1 files changed, 21 insertions, 6 deletions
diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index 0ba0f0992d6..b38a10e6f2e 100644
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -360,8 +360,8 @@ xfs_qm_dqalloc(
return (error);
}
-void
-xfs_dquot_read_verify(
+static void
+xfs_dquot_buf_verify(
struct xfs_buf *bp)
{
struct xfs_mount *mp = bp->b_target->bt_mount;
@@ -388,12 +388,26 @@ xfs_dquot_read_verify(
error = xfs_qm_dqcheck(mp, ddq, id + i, 0, XFS_QMOPT_DOWARN,
"xfs_dquot_read_verify");
if (error) {
- XFS_CORRUPTION_ERROR("xfs_dquot_read_verify",
- XFS_ERRLEVEL_LOW, mp, d);
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, d);
xfs_buf_ioerror(bp, EFSCORRUPTED);
break;
}
}
+}
+
+static void
+xfs_dquot_buf_write_verify(
+ struct xfs_buf *bp)
+{
+ xfs_dquot_buf_verify(bp);
+}
+
+void
+xfs_dquot_buf_read_verify(
+ struct xfs_buf *bp)
+{
+ xfs_dquot_buf_verify(bp);
+ bp->b_pre_io = xfs_dquot_buf_write_verify;
bp->b_iodone = NULL;
xfs_buf_ioend(bp, 0);
}
@@ -413,7 +427,7 @@ xfs_qm_dqrepair(
/*
* Read the buffer without verification so we get the corrupted
- * buffer returned to us.
+ * buffer returned to us. make sure we verify it on write, though.
*/
error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, dqp->q_blkno,
mp->m_quotainfo->qi_dqchunklen,
@@ -423,6 +437,7 @@ xfs_qm_dqrepair(
ASSERT(*bpp == NULL);
return XFS_ERROR(error);
}
+ (*bpp)->b_pre_io = xfs_dquot_buf_write_verify;
ASSERT(xfs_buf_islocked(*bpp));
d = (struct xfs_dqblk *)(*bpp)->b_addr;
@@ -521,7 +536,7 @@ xfs_qm_dqtobp(
error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp,
dqp->q_blkno,
mp->m_quotainfo->qi_dqchunklen,
- 0, &bp, xfs_dquot_read_verify);
+ 0, &bp, xfs_dquot_buf_read_verify);
if (error == EFSCORRUPTED && (flags & XFS_QMOPT_DQREPAIR)) {
xfs_dqid_t firstid = (xfs_dqid_t)map.br_startoff *