xfs: connect up write verifiers to new buffers

Metadata buffers that are read from disk have write verifiers
already attached to them, but newly allocated buffers do not. Add
appropriate write verifiers to all new metadata buffers.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

24 files changed, 137 insertions, 89 deletions

diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c
index d12bbed..545a6c4 100644
--- a/fs/xfs/xfs_alloc.c
+++ b/fs/xfs/xfs_alloc.c
@@ -465,14 +465,14 @@ xfs_agfl_verify(
 #endif
 }
 
-static void
+void
 xfs_agfl_write_verify(
 	struct xfs_buf	*bp)
 {
 	xfs_agfl_verify(bp);
 }
 
-void
+static void
 xfs_agfl_read_verify(
 	struct xfs_buf	*bp)
 {
@@ -2181,14 +2181,14 @@ xfs_agf_verify(
 	}
 }
 
-static void
+void
 xfs_agf_write_verify(
 	struct xfs_buf	*bp)
 {
 	xfs_agf_verify(bp);
 }
 
-void
+static void
 xfs_agf_read_verify(
 	struct xfs_buf	*bp)
 {
diff --git a/fs/xfs/xfs_alloc.h b/fs/xfs/xfs_alloc.h
index feacb06..f32811f 100644
--- a/fs/xfs/xfs_alloc.h
+++ b/fs/xfs/xfs_alloc.h
@@ -231,4 +231,7 @@ xfs_alloc_get_rec(
 	xfs_extlen_t		*len,	/* output: length of extent */
 	int			*stat);	/* output: success/failure */
 
+void xfs_agf_write_verify(struct xfs_buf *bp);
+void xfs_agfl_write_verify(struct xfs_buf *bp);
+
 #endif	/* __XFS_ALLOC_H__ */
diff --git a/fs/xfs/xfs_alloc_btree.c b/fs/xfs/xfs_alloc_btree.c
index 6e98b22..b833965 100644
--- a/fs/xfs/xfs_alloc_btree.c
+++ b/fs/xfs/xfs_alloc_btree.c
@@ -401,6 +401,7 @@ static const struct xfs_btree_ops xfs_allocbt_ops = {
 	.init_ptr_from_cur	= xfs_allocbt_init_ptr_from_cur,
 	.key_diff		= xfs_allocbt_key_diff,
 	.read_verify		= xfs_allocbt_read_verify,
+	.write_verify		= xfs_allocbt_write_verify,
 #ifdef DEBUG
 	.keys_inorder		= xfs_allocbt_keys_inorder,
 	.recs_inorder		= xfs_allocbt_recs_inorder,
diff --git a/fs/xfs/xfs_attr_leaf.c b/fs/xfs/xfs_attr_leaf.c
index 57729d7..5cd5b0c 100644
--- a/fs/xfs/xfs_attr_leaf.c
+++ b/fs/xfs/xfs_attr_leaf.c
@@ -924,7 +924,7 @@ xfs_attr_leaf_to_node(xfs_da_args_t *args)
 					    XFS_ATTR_FORK);
 	if (error)
 		goto out;
-	ASSERT(bp2 != NULL);
+	bp2->b_pre_io = bp1->b_pre_io;
 	memcpy(bp2->b_addr, bp1->b_addr, XFS_LBSIZE(dp->i_mount));
 	bp1 = NULL;
 	xfs_trans_log_buf(args->trans, bp2, 0, XFS_LBSIZE(dp->i_mount) - 1);
@@ -978,7 +978,7 @@ xfs_attr_leaf_create(
 					    XFS_ATTR_FORK);
 	if (error)
 		return(error);
-	ASSERT(bp != NULL);
+	bp->b_pre_io = xfs_attr_leaf_write_verify;
 	leaf = bp->b_addr;
 	memset((char *)leaf, 0, XFS_LBSIZE(dp->i_mount));
 	hdr = &leaf->hdr;
diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index 9ae7aba..6a0f3f9 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -3124,6 +3124,7 @@ xfs_bmap_extents_to_btree(
 	/*
 	 * Fill in the child block.
 	 */
+	abp->b_pre_io = xfs_bmbt_write_verify;
 	ablock = XFS_BUF_TO_BLOCK(abp);
 	ablock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
 	ablock->bb_level = 0;
@@ -3270,6 +3271,7 @@ xfs_bmap_local_to_extents(
 		ASSERT(args.len == 1);
 		*firstblock = args.fsbno;
 		bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0);
+		bp->b_pre_io = xfs_bmbt_write_verify;
 		memcpy(bp->b_addr, ifp->if_u1.if_data, ifp->if_bytes);
 		xfs_trans_log_buf(tp, bp, 0, ifp->if_bytes - 1);
 		xfs_bmap_forkoff_reset(args.mp, ip, whichfork);
diff --git a/fs/xfs/xfs_bmap_btree.c b/fs/xfs/xfs_bmap_btree.c
index 17d7423..79758e1 100644
--- a/fs/xfs/xfs_bmap_btree.c
+++ b/fs/xfs/xfs_bmap_btree.c
@@ -749,7 +749,7 @@ xfs_bmbt_verify(
 	}
 }
 
-static void
+void
 xfs_bmbt_write_verify(
 	struct xfs_buf	*bp)
 {
@@ -806,6 +806,7 @@ static const struct xfs_btree_ops xfs_bmbt_ops = {
 	.init_ptr_from_cur	= xfs_bmbt_init_ptr_from_cur,
 	.key_diff		= xfs_bmbt_key_diff,
 	.read_verify		= xfs_bmbt_read_verify,
+	.write_verify		= xfs_bmbt_write_verify,
 #ifdef DEBUG
 	.keys_inorder		= xfs_bmbt_keys_inorder,
 	.recs_inorder		= xfs_bmbt_recs_inorder,
diff --git a/fs/xfs/xfs_bmap_btree.h b/fs/xfs/xfs_bmap_btree.h
index 1d00fbe..938c859 100644
--- a/fs/xfs/xfs_bmap_btree.h
+++ b/fs/xfs/xfs_bmap_btree.h
@@ -233,6 +233,7 @@ extern int xfs_bmbt_get_maxrecs(struct xfs_btree_cur *, int level);
 extern int xfs_bmdr_maxrecs(struct xfs_mount *, int blocklen, int leaf);
 extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf);
 extern void xfs_bmbt_read_verify(struct xfs_buf *bp);
+extern void xfs_bmbt_write_verify(struct xfs_buf *bp);
 
 extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *,
 		struct xfs_trans *, struct xfs_inode *, int);
diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c
index ef10660..1e2d89e 100644
--- a/fs/xfs/xfs_btree.c
+++ b/fs/xfs/xfs_btree.c
@@ -996,6 +996,7 @@ xfs_btree_get_buf_block(
 	if (!*bpp)
 		return ENOMEM;
 
+	(*bpp)->b_pre_io = cur->bc_ops->write_verify;
 	*block = XFS_BUF_TO_BLOCK(*bpp);
 	return 0;
 }
diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h
index 3a4c314..458ab35 100644
--- a/fs/xfs/xfs_btree.h
+++ b/fs/xfs/xfs_btree.h
@@ -189,6 +189,8 @@ struct xfs_btree_ops {
 			      union xfs_btree_key *key);
 
 	void	(*read_verify)(struct xfs_buf *bp);
+	void	(*write_verify)(struct xfs_buf *bp);
+
 #ifdef DEBUG
 	/* check that k1 is lower than k2 */
 	int	(*keys_inorder)(struct xfs_btree_cur *cur,
diff --git a/fs/xfs/xfs_da_btree.c b/fs/xfs/xfs_da_btree.c
index 6bb0a59..087950f 100644
--- a/fs/xfs/xfs_da_btree.c
+++ b/fs/xfs/xfs_da_btree.c
@@ -193,6 +193,7 @@ xfs_da_node_create(xfs_da_args_t *args, xfs_dablk_t blkno, int level,
 	xfs_trans_log_buf(tp, bp,
 		XFS_DA_LOGRANGE(node, &node->hdr, sizeof(node->hdr)));
 
+	bp->b_pre_io = xfs_da_node_write_verify;
 	*bpp = bp;
 	return(0);
 }
@@ -392,6 +393,8 @@ xfs_da_root_split(xfs_da_state_t *state, xfs_da_state_blk_t *blk1,
 	}
 	memcpy(node, oldroot, size);
 	xfs_trans_log_buf(tp, bp, 0, size - 1);
+
+	bp->b_pre_io = blk1->bp->b_pre_io;
 	blk1->bp = bp;
 	blk1->blkno = blkno;
 
diff --git a/fs/xfs/xfs_dir2_block.c b/fs/xfs/xfs_dir2_block.c
index 0f8793c..e2fdc6f 100644
--- a/fs/xfs/xfs_dir2_block.c
+++ b/fs/xfs/xfs_dir2_block.c
@@ -1010,6 +1010,7 @@ xfs_dir2_leaf_to_block(
 	/*
 	 * Start converting it to block form.
 	 */
+	dbp->b_pre_io = xfs_dir2_block_write_verify;
 	hdr->magic = cpu_to_be32(XFS_DIR2_BLOCK_MAGIC);
 	needlog = 1;
 	needscan = 0;
@@ -1139,6 +1140,7 @@ xfs_dir2_sf_to_block(
 		kmem_free(sfp);
 		return error;
 	}
+	bp->b_pre_io = xfs_dir2_block_write_verify;
 	hdr = bp->b_addr;
 	hdr->magic = cpu_to_be32(XFS_DIR2_BLOCK_MAGIC);
 	/*
diff --git a/fs/xfs/xfs_dir2_data.c b/fs/xfs/xfs_dir2_data.c
index b555585..dcb8a87 100644
--- a/fs/xfs/xfs_dir2_data.c
+++ b/fs/xfs/xfs_dir2_data.c
@@ -185,7 +185,7 @@ __xfs_dir2_data_check(
 	return 0;
 }
 
-void
+static void
 xfs_dir2_data_verify(
 	struct xfs_buf		*bp)
 {
@@ -202,14 +202,14 @@ xfs_dir2_data_verify(
 	}
 }
 
-static void
+void
 xfs_dir2_data_write_verify(
 	struct xfs_buf	*bp)
 {
 	xfs_dir2_data_verify(bp);
 }
 
-void
+static void
 xfs_dir2_data_read_verify(
 	struct xfs_buf	*bp)
 {
@@ -482,10 +482,9 @@ xfs_dir2_data_init(
 	 */
 	error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(mp, blkno), -1, &bp,
 		XFS_DATA_FORK);
-	if (error) {
+	if (error)
 		return error;
-	}
-	ASSERT(bp != NULL);
+	bp->b_pre_io = xfs_dir2_data_write_verify;
 
 	/*
 	 * Initialize the header.
diff --git a/fs/xfs/xfs_dir2_leaf.c b/fs/xfs/xfs_dir2_leaf.c
index 5b3bcab..3002ab7 100644
--- a/fs/xfs/xfs_dir2_leaf.c
+++ b/fs/xfs/xfs_dir2_leaf.c
@@ -81,7 +81,7 @@ xfs_dir2_leaf1_read_verify(
 	xfs_buf_ioend(bp, 0);
 }
 
-static void
+void
 xfs_dir2_leafn_write_verify(
 	struct xfs_buf	*bp)
 {
@@ -198,6 +198,7 @@ xfs_dir2_block_to_leaf(
 	/*
 	 * Fix up the block header, make it a data block.
 	 */
+	dbp->b_pre_io = xfs_dir2_data_write_verify;
 	hdr->magic = cpu_to_be32(XFS_DIR2_DATA_MAGIC);
 	if (needscan)
 		xfs_dir2_data_freescan(mp, hdr, &needlog);
@@ -1243,15 +1244,14 @@ xfs_dir2_leaf_init(
 	 * Get the buffer for the block.
 	 */
 	error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(mp, bno), -1, &bp,
-		XFS_DATA_FORK);
-	if (error) {
+			       XFS_DATA_FORK);
+	if (error)
 		return error;
-	}
-	ASSERT(bp != NULL);
-	leaf = bp->b_addr;
+
 	/*
 	 * Initialize the header.
 	 */
+	leaf = bp->b_addr;
 	leaf->hdr.info.magic = cpu_to_be16(magic);
 	leaf->hdr.info.forw = 0;
 	leaf->hdr.info.back = 0;
@@ -1264,10 +1264,12 @@ xfs_dir2_leaf_init(
 	 * the block.
 	 */
 	if (magic == XFS_DIR2_LEAF1_MAGIC) {
+		bp->b_pre_io = xfs_dir2_leaf1_write_verify;
 		ltp = xfs_dir2_leaf_tail_p(mp, leaf);
 		ltp->bestcount = 0;
 		xfs_dir2_leaf_log_tail(tp, bp);
-	}
+	} else
+		bp->b_pre_io = xfs_dir2_leafn_write_verify;
 	*bpp = bp;
 	return 0;
 }
@@ -1951,7 +1953,10 @@ xfs_dir2_node_to_leaf(
 		xfs_dir2_leaf_compact(args, lbp);
 	else
 		xfs_dir2_leaf_log_header(tp, lbp);
+
+	lbp->b_pre_io = xfs_dir2_leaf1_write_verify;
 	leaf->hdr.info.magic = cpu_to_be16(XFS_DIR2_LEAF1_MAGIC);
+
 	/*
 	 * Set up the leaf tail from the freespace block.
 	 */
diff --git a/fs/xfs/xfs_dir2_node.c b/fs/xfs/xfs_dir2_node.c
index a58abe1..da90a91 100644
--- a/fs/xfs/xfs_dir2_node.c
+++ b/fs/xfs/xfs_dir2_node.c
@@ -197,11 +197,12 @@ xfs_dir2_leaf_to_node(
 	/*
 	 * Get the buffer for the new freespace block.
 	 */
-	if ((error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(mp, fdb), -1, &fbp,
-			XFS_DATA_FORK))) {
+	error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(mp, fdb), -1, &fbp,
+				XFS_DATA_FORK);
+	if (error)
 		return error;
-	}
-	ASSERT(fbp != NULL);
+	fbp->b_pre_io = xfs_dir2_free_write_verify;
+
 	free = fbp->b_addr;
 	leaf = lbp->b_addr;
 	ltp = xfs_dir2_leaf_tail_p(mp, leaf);
@@ -223,7 +224,10 @@ xfs_dir2_leaf_to_node(
 		*to = cpu_to_be16(off);
 	}
 	free->hdr.nused = cpu_to_be32(n);
+
+	lbp->b_pre_io = xfs_dir2_leafn_write_verify;
 	leaf->hdr.info.magic = cpu_to_be16(XFS_DIR2_LEAFN_MAGIC);
+
 	/*
 	 * Log everything.
 	 */
@@ -632,6 +636,7 @@ xfs_dir2_leafn_lookup_for_entry(
 			state->extrablk.index = (int)((char *)dep -
 							(char *)curbp->b_addr);
 			state->extrablk.magic = XFS_DIR2_DATA_MAGIC;
+			curbp->b_pre_io = xfs_dir2_data_write_verify;
 			if (cmp == XFS_CMP_EXACT)
 				return XFS_ERROR(EEXIST);
 		}
@@ -646,6 +651,7 @@ xfs_dir2_leafn_lookup_for_entry(
 			state->extrablk.index = -1;
 			state->extrablk.blkno = curdb;
 			state->extrablk.magic = XFS_DIR2_DATA_MAGIC;
+			curbp->b_pre_io = xfs_dir2_data_write_verify;
 		} else {
 			/* If the curbp is not the CI match block, drop it */
 			if (state->extrablk.bp != curbp)
@@ -1638,12 +1644,12 @@ xfs_dir2_node_addname_int(
 			/*
 			 * Get a buffer for the new block.
 			 */
-			if ((error = xfs_da_get_buf(tp, dp,
-						   xfs_dir2_db_to_da(mp, fbno),
-						   -1, &fbp, XFS_DATA_FORK))) {
+			error = xfs_da_get_buf(tp, dp,
+					       xfs_dir2_db_to_da(mp, fbno),
+					       -1, &fbp, XFS_DATA_FORK);
+			if (error)
 				return error;
-			}
-			ASSERT(fbp != NULL);
+			fbp->b_pre_io = xfs_dir2_free_write_verify;
 
 			/*
 			 * Initialize the new block to be empty, and remember
diff --git a/fs/xfs/xfs_dir2_priv.h b/fs/xfs/xfs_dir2_priv.h
index 7ec61af..01b82dc 100644
--- a/fs/xfs/xfs_dir2_priv.h
+++ b/fs/xfs/xfs_dir2_priv.h
@@ -45,6 +45,7 @@ extern int xfs_dir2_leaf_to_block(struct xfs_da_args *args,
 #else
 #define	xfs_dir2_data_check(dp,bp)
 #endif
+extern void xfs_dir2_data_write_verify(struct xfs_buf *bp);
 extern int __xfs_dir2_data_check(struct xfs_inode *dp, struct xfs_buf *bp);
 extern int xfs_dir2_data_read(struct xfs_trans *tp, struct xfs_inode *dp,
 		xfs_dablk_t bno, xfs_daddr_t mapped_bno, struct xfs_buf **bpp);
@@ -73,6 +74,7 @@ extern void xfs_dir2_data_use_free(struct xfs_trans *tp, struct xfs_buf *bp,
 
 /* xfs_dir2_leaf.c */
 extern void xfs_dir2_leafn_read_verify(struct xfs_buf *bp);
+extern void xfs_dir2_leafn_write_verify(struct xfs_buf *bp);
 extern int xfs_dir2_leafn_read(struct xfs_trans *tp, struct xfs_inode *dp,
 		xfs_dablk_t fbno, xfs_daddr_t mappedbno, struct xfs_buf **bpp);
 extern int xfs_dir2_block_to_leaf(struct xfs_da_args *args,
diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index b38a10e..1b06aa0 100644
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -248,7 +248,57 @@ xfs_qm_init_dquot_blk(
 	xfs_trans_log_buf(tp, bp, 0, BBTOB(q->qi_dqchunklen) - 1);
 }
 
+static void
+xfs_dquot_buf_verify(
+	struct xfs_buf		*bp)
+{
+	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_dqblk	*d = (struct xfs_dqblk *)bp->b_addr;
+	struct xfs_disk_dquot	*ddq;
+	xfs_dqid_t		id = 0;
+	int			i;
+
+	/*
+	 * On the first read of the buffer, verify that each dquot is valid.
+	 * We don't know what the id of the dquot is supposed to be, just that
+	 * they should be increasing monotonically within the buffer. If the
+	 * first id is corrupt, then it will fail on the second dquot in the
+	 * buffer so corruptions could point to the wrong dquot in this case.
+	 */
+	for (i = 0; i < mp->m_quotainfo->qi_dqperchunk; i++) {
+		int	error;
+
+		ddq = &d[i].dd_diskdq;
+
+		if (i == 0)
+			id = be32_to_cpu(ddq->d_id);
+
+		error = xfs_qm_dqcheck(mp, ddq, id + i, 0, XFS_QMOPT_DOWARN,
+					"xfs_dquot_read_verify");
+		if (error) {
+			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);
+}
 
 /*
  * Allocate a block and fill it with dquots.
@@ -315,6 +365,7 @@ xfs_qm_dqalloc(
 	error = xfs_buf_geterror(bp);
 	if (error)
 		goto error1;
+	bp->b_pre_io = xfs_dquot_buf_write_verify;
 
 	/*
 	 * Make a chunk of dquots out of this buffer and log
@@ -359,59 +410,6 @@ xfs_qm_dqalloc(
 
 	return (error);
 }
-
-static void
-xfs_dquot_buf_verify(
-	struct xfs_buf		*bp)
-{
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
-	struct xfs_dqblk	*d = (struct xfs_dqblk *)bp->b_addr;
-	struct xfs_disk_dquot	*ddq;
-	xfs_dqid_t		id = 0;
-	int			i;
-
-	/*
-	 * On the first read of the buffer, verify that each dquot is valid.
-	 * We don't know what the id of the dquot is supposed to be, just that
-	 * they should be increasing monotonically within the buffer. If the
-	 * first id is corrupt, then it will fail on the second dquot in the
-	 * buffer so corruptions could point to the wrong dquot in this case.
-	 */
-	for (i = 0; i < mp->m_quotainfo->qi_dqperchunk; i++) {
-		int	error;
-
-		ddq = &d[i].dd_diskdq;
-
-		if (i == 0)
-			id = be32_to_cpu(ddq->d_id);
-
-		error = xfs_qm_dqcheck(mp, ddq, id + i, 0, XFS_QMOPT_DOWARN,
-					"xfs_dquot_read_verify");
-		if (error) {
-			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);
-}
-
 STATIC int
 xfs_qm_dqrepair(
 	struct xfs_mount	*mp,
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index cb65b06..5d6d6b9 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -222,6 +222,7 @@ xfs_growfs_data_private(
 			error = ENOMEM;
 			goto error0;
 		}
+		bp->b_pre_io = xfs_agf_write_verify;
 
 		agf = XFS_BUF_TO_AGF(bp);
 		agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC);
@@ -259,6 +260,7 @@ xfs_growfs_data_private(
 			error = ENOMEM;
 			goto error0;
 		}
+		bp->b_pre_io = xfs_agfl_write_verify;
 
 		agfl = XFS_BUF_TO_AGFL(bp);
 		for (bucket = 0; bucket < XFS_AGFL_SIZE(mp); bucket++)
@@ -279,6 +281,7 @@ xfs_growfs_data_private(
 			error = ENOMEM;
 			goto error0;
 		}
+		bp->b_pre_io = xfs_agi_write_verify;
 
 		agi = XFS_BUF_TO_AGI(bp);
 		agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC);
@@ -450,9 +453,10 @@ xfs_growfs_data_private(
 			bp = xfs_trans_get_buf(NULL, mp->m_ddev_targp,
 				  XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)),
 				  XFS_FSS_TO_BB(mp, 1), 0);
-			if (bp)
+			if (bp) {
 				xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
-			else
+				bp->b_pre_io = xfs_sb_write_verify;
+			} else
 				error = ENOMEM;
 		}
 
diff --git a/fs/xfs/xfs_ialloc.c b/fs/xfs/xfs_ialloc.c
index 070f418..faf6860 100644
--- a/fs/xfs/xfs_ialloc.c
+++ b/fs/xfs/xfs_ialloc.c
@@ -210,6 +210,7 @@ xfs_ialloc_inode_init(
 		 *	to log a whole cluster of inodes instead of all the
 		 *	individual transactions causing a lot of log traffic.
 		 */
+		fbuf->b_pre_io = xfs_inode_buf_write_verify;
 		xfs_buf_zero(fbuf, 0, ninodes << mp->m_sb.sb_inodelog);
 		for (i = 0; i < ninodes; i++) {
 			int	ioffset = i << mp->m_sb.sb_inodelog;
@@ -1504,14 +1505,14 @@ xfs_agi_verify(
 	xfs_check_agi_unlinked(agi);
 }
 
-static void
+void
 xfs_agi_write_verify(
 	struct xfs_buf	*bp)
 {
 	xfs_agi_verify(bp);
 }
 
-void
+static void
 xfs_agi_read_verify(
 	struct xfs_buf	*bp)
 {
diff --git a/fs/xfs/xfs_ialloc.h b/fs/xfs/xfs_ialloc.h
index 1fd6ea4..7a169e3 100644
--- a/fs/xfs/xfs_ialloc.h
+++ b/fs/xfs/xfs_ialloc.h
@@ -147,7 +147,9 @@ int xfs_inobt_lookup(struct xfs_btree_cur *cur, xfs_agino_t ino,
 /*
  * Get the data from the pointed-to record.
  */
-extern int xfs_inobt_get_rec(struct xfs_btree_cur *cur,
+int xfs_inobt_get_rec(struct xfs_btree_cur *cur,
 		xfs_inobt_rec_incore_t *rec, int *stat);
 
+void xfs_agi_write_verify(struct xfs_buf *bp);
+
 #endif	/* __XFS_IALLOC_H__ */
diff --git a/fs/xfs/xfs_ialloc_btree.c b/fs/xfs/xfs_ialloc_btree.c
index 15a79f8..7761e1e 100644
--- a/fs/xfs/xfs_ialloc_btree.c
+++ b/fs/xfs/xfs_ialloc_btree.c
@@ -271,6 +271,7 @@ static const struct xfs_btree_ops xfs_inobt_ops = {
 	.init_ptr_from_cur	= xfs_inobt_init_ptr_from_cur,
 	.key_diff		= xfs_inobt_key_diff,
 	.read_verify		= xfs_inobt_read_verify,
+	.write_verify		= xfs_inobt_write_verify,
 #ifdef DEBUG
 	.keys_inorder		= xfs_inobt_keys_inorder,
 	.recs_inorder		= xfs_inobt_recs_inorder,
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 910b2da..dfcbe73 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -420,7 +420,7 @@ xfs_inode_buf_verify(
 	xfs_inobp_check(mp, bp);
 }
 
-static void
+void
 xfs_inode_buf_write_verify(
 	struct xfs_buf	*bp)
 {
@@ -1782,6 +1782,18 @@ xfs_ifree_cluster(
 
 		if (!bp)
 			return ENOMEM;
+
+		/*
+		 * This buffer may not have been correctly initialised as we
+		 * didn't read it from disk. That's not important because we are
+		 * only using to mark the buffer as stale in the log, and to
+		 * attach stale cached inodes on it. That means it will never be
+		 * dispatched for IO. If it is, we want to know about it, and we
+		 * want it to fail. We can acheive this by adding a write
+		 * verifier to the buffer.
+		 */
+		 bp->b_pre_io = xfs_inode_buf_write_verify;
+
 		/*
 		 * Walk the inodes already attached to the buffer and mark them
 		 * stale. These will all have the flush locks held, so an
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index a322c19..482214d 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -555,6 +555,7 @@ int		xfs_imap_to_bp(struct xfs_mount *, struct xfs_trans *,
 int		xfs_iread(struct xfs_mount *, struct xfs_trans *,
 			  struct xfs_inode *, uint);
 void		xfs_inode_buf_read_verify(struct xfs_buf *);
+void		xfs_inode_buf_write_verify(struct xfs_buf *);
 void		xfs_dinode_to_disk(struct xfs_dinode *,
 				   struct xfs_icdinode *);
 void		xfs_idestroy_fork(struct xfs_inode *, int);
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index c85da75..152a7fc 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -631,7 +631,7 @@ xfs_sb_verify(
 		xfs_buf_ioerror(bp, error);
 }
 
-static void
+void
 xfs_sb_write_verify(
 	struct xfs_buf	*bp)
 {
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index de9089a..29c1b3a 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -386,6 +386,7 @@ extern void	xfs_set_low_space_thresholds(struct xfs_mount *);
 #endif	/* __KERNEL__ */
 
 extern void	xfs_sb_read_verify(struct xfs_buf *);
+extern void	xfs_sb_write_verify(struct xfs_buf *bp);
 extern void	xfs_mod_sb(struct xfs_trans *, __int64_t);
 extern int	xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t,
 					xfs_agnumber_t *);