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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_da_btree.c
parentcfb02852226aa449fe27075caffe88726507668c (diff)
downloadop-kernel-dev-612cfbfe174a89d565363fff7f3961a2dda5fb71.zip
op-kernel-dev-612cfbfe174a89d565363fff7f3961a2dda5fb71.tar.gz
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_da_btree.c')
-rw-r--r--fs/xfs/xfs_da_btree.c37
1 files changed, 25 insertions, 12 deletions
diff --git a/fs/xfs/xfs_da_btree.c b/fs/xfs/xfs_da_btree.c
index 93ebc0f..6bb0a59 100644
--- a/fs/xfs/xfs_da_btree.c
+++ b/fs/xfs/xfs_da_btree.c
@@ -92,7 +92,7 @@ STATIC int xfs_da_blk_unlink(xfs_da_state_t *state,
STATIC void xfs_da_state_kill_altpath(xfs_da_state_t *state);
static void
-__xfs_da_node_verify(
+xfs_da_node_verify(
struct xfs_buf *bp)
{
struct xfs_mount *mp = bp->b_target->bt_mount;
@@ -108,12 +108,17 @@ __xfs_da_node_verify(
xfs_buf_ioerror(bp, EFSCORRUPTED);
}
- bp->b_iodone = NULL;
- xfs_buf_ioend(bp, 0);
}
static void
-xfs_da_node_verify(
+xfs_da_node_write_verify(
+ struct xfs_buf *bp)
+{
+ xfs_da_node_verify(bp);
+}
+
+static void
+xfs_da_node_read_verify(
struct xfs_buf *bp)
{
struct xfs_mount *mp = bp->b_target->bt_mount;
@@ -121,21 +126,22 @@ xfs_da_node_verify(
switch (be16_to_cpu(info->magic)) {
case XFS_DA_NODE_MAGIC:
- __xfs_da_node_verify(bp);
- return;
+ xfs_da_node_verify(bp);
+ break;
case XFS_ATTR_LEAF_MAGIC:
- xfs_attr_leaf_verify(bp);
+ xfs_attr_leaf_read_verify(bp);
return;
case XFS_DIR2_LEAFN_MAGIC:
- xfs_dir2_leafn_verify(bp);
+ xfs_dir2_leafn_read_verify(bp);
return;
default:
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW,
+ mp, info);
+ xfs_buf_ioerror(bp, EFSCORRUPTED);
break;
}
- XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, info);
- xfs_buf_ioerror(bp, EFSCORRUPTED);
-
+ bp->b_pre_io = xfs_da_node_write_verify;
bp->b_iodone = NULL;
xfs_buf_ioend(bp, 0);
}
@@ -150,7 +156,7 @@ xfs_da_node_read(
int which_fork)
{
return xfs_da_read_buf(tp, dp, bno, mappedbno, bpp,
- which_fork, xfs_da_node_verify);
+ which_fork, xfs_da_node_read_verify);
}
/*========================================================================
@@ -816,7 +822,14 @@ xfs_da_root_join(xfs_da_state_t *state, xfs_da_state_blk_t *root_blk)
xfs_da_blkinfo_onlychild_validate(bp->b_addr,
be16_to_cpu(oldroot->hdr.level));
+ /*
+ * This could be copying a leaf back into the root block in the case of
+ * there only being a single leaf block left in the tree. Hence we have
+ * to update the pre_io pointer as well to match the buffer type change
+ * that could occur.
+ */
memcpy(root_blk->bp->b_addr, bp->b_addr, state->blocksize);
+ root_blk->bp->b_pre_io = bp->b_pre_io;
xfs_trans_log_buf(args->trans, root_blk->bp, 0, state->blocksize - 1);
error = xfs_da_shrink_inode(args, child, bp);
return(error);
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