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authorDave Chinner <dchinner@redhat.com>2012-11-12 22:54:14 +1100
committerBen Myers <bpm@sgi.com>2012-11-15 21:34:45 -0600
commite4813572640e27d3a5cce3f06751a9f54f77aaa5 (patch)
treef181db296dace8bac868f89a0a016f5973c18ba1 /fs/xfs
parent2025207ca6738a1217126ef14af9d104433f9824 (diff)
xfs: factor out dir2 data block reading
And add a verifier callback function while there. Signed-off-by: Dave Chinner <dchinner@redhat.com> 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_dir2_block.c3
-rw-r--r--fs/xfs/xfs_dir2_data.c32
-rw-r--r--fs/xfs/xfs_dir2_leaf.c38
-rw-r--r--fs/xfs/xfs_dir2_node.c8
-rw-r--r--fs/xfs/xfs_dir2_priv.h2
5 files changed, 56 insertions, 27 deletions
diff --git a/fs/xfs/xfs_dir2_block.c b/fs/xfs/xfs_dir2_block.c
index 57351b86886..ca03b109772 100644
--- a/fs/xfs/xfs_dir2_block.c
+++ b/fs/xfs/xfs_dir2_block.c
@@ -970,8 +970,7 @@ xfs_dir2_leaf_to_block(
* Read the data block if we don't already have it, give up if it fails.
*/
if (!dbp) {
- error = xfs_da_read_buf(tp, dp, mp->m_dirdatablk, -1, &dbp,
- XFS_DATA_FORK, NULL);
+ error = xfs_dir2_data_read(tp, dp, mp->m_dirdatablk, -1, &dbp);
if (error)
return error;
}
diff --git a/fs/xfs/xfs_dir2_data.c b/fs/xfs/xfs_dir2_data.c
index cb117234e32..0ef04f1bf51 100644
--- a/fs/xfs/xfs_dir2_data.c
+++ b/fs/xfs/xfs_dir2_data.c
@@ -185,6 +185,38 @@ __xfs_dir2_data_check(
return 0;
}
+static void
+xfs_dir2_data_verify(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+ struct xfs_dir2_data_hdr *hdr = bp->b_addr;
+ int block_ok = 0;
+
+ block_ok = hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC);
+ block_ok = block_ok && __xfs_dir2_data_check(NULL, bp) == 0;
+
+ if (!block_ok) {
+ XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, hdr);
+ xfs_buf_ioerror(bp, EFSCORRUPTED);
+ }
+
+ bp->b_iodone = NULL;
+ xfs_buf_ioend(bp, 0);
+}
+
+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)
+{
+ return xfs_da_read_buf(tp, dp, bno, mapped_bno, bpp,
+ XFS_DATA_FORK, xfs_dir2_data_verify);
+}
+
/*
* Given a data block and an unused entry from that block,
* return the bestfree entry if any that corresponds to it.
diff --git a/fs/xfs/xfs_dir2_leaf.c b/fs/xfs/xfs_dir2_leaf.c
index 6c1359dc989..0fdf765c917 100644
--- a/fs/xfs/xfs_dir2_leaf.c
+++ b/fs/xfs/xfs_dir2_leaf.c
@@ -493,14 +493,14 @@ xfs_dir2_leaf_addname(
hdr = dbp->b_addr;
bestsp[use_block] = hdr->bestfree[0].length;
grown = 1;
- }
- /*
- * Already had space in some data block.
- * Just read that one in.
- */
- else {
- error = xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, use_block),
- -1, &dbp, XFS_DATA_FORK, NULL);
+ } else {
+ /*
+ * Already had space in some data block.
+ * Just read that one in.
+ */
+ error = xfs_dir2_data_read(tp, dp,
+ xfs_dir2_db_to_da(mp, use_block),
+ -1, &dbp);
if (error) {
xfs_trans_brelse(tp, lbp);
return error;
@@ -508,7 +508,6 @@ xfs_dir2_leaf_addname(
hdr = dbp->b_addr;
grown = 0;
}
- xfs_dir2_data_check(dp, dbp);
/*
* Point to the biggest freespace in our data block.
*/
@@ -891,10 +890,9 @@ xfs_dir2_leaf_readbuf(
* Read the directory block starting at the first mapping.
*/
mip->curdb = xfs_dir2_da_to_db(mp, map->br_startoff);
- error = xfs_da_read_buf(NULL, dp, map->br_startoff,
+ error = xfs_dir2_data_read(NULL, dp, map->br_startoff,
map->br_blockcount >= mp->m_dirblkfsbs ?
- XFS_FSB_TO_DADDR(mp, map->br_startblock) : -1,
- &bp, XFS_DATA_FORK, NULL);
+ XFS_FSB_TO_DADDR(mp, map->br_startblock) : -1, &bp);
/*
* Should just skip over the data block instead of giving up.
@@ -1408,14 +1406,13 @@ xfs_dir2_leaf_lookup_int(
if (newdb != curdb) {
if (dbp)
xfs_trans_brelse(tp, dbp);
- error = xfs_da_read_buf(tp, dp,
- xfs_dir2_db_to_da(mp, newdb),
- -1, &dbp, XFS_DATA_FORK, NULL);
+ error = xfs_dir2_data_read(tp, dp,
+ xfs_dir2_db_to_da(mp, newdb),
+ -1, &dbp);
if (error) {
xfs_trans_brelse(tp, lbp);
return error;
}
- xfs_dir2_data_check(dp, dbp);
curdb = newdb;
}
/*
@@ -1450,9 +1447,9 @@ xfs_dir2_leaf_lookup_int(
ASSERT(cidb != -1);
if (cidb != curdb) {
xfs_trans_brelse(tp, dbp);
- error = xfs_da_read_buf(tp, dp,
- xfs_dir2_db_to_da(mp, cidb),
- -1, &dbp, XFS_DATA_FORK, NULL);
+ error = xfs_dir2_data_read(tp, dp,
+ xfs_dir2_db_to_da(mp, cidb),
+ -1, &dbp);
if (error) {
xfs_trans_brelse(tp, lbp);
return error;
@@ -1737,8 +1734,7 @@ xfs_dir2_leaf_trim_data(
/*
* Read the offending data block. We need its buffer.
*/
- error = xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, db), -1, &dbp,
- XFS_DATA_FORK, NULL);
+ error = xfs_dir2_data_read(tp, dp, xfs_dir2_db_to_da(mp, db), -1, &dbp);
if (error)
return error;
diff --git a/fs/xfs/xfs_dir2_node.c b/fs/xfs/xfs_dir2_node.c
index d7f899dfbff..67b811c17ea 100644
--- a/fs/xfs/xfs_dir2_node.c
+++ b/fs/xfs/xfs_dir2_node.c
@@ -583,9 +583,9 @@ xfs_dir2_leafn_lookup_for_entry(
ASSERT(state->extravalid);
curbp = state->extrablk.bp;
} else {
- error = xfs_da_read_buf(tp, dp,
+ error = xfs_dir2_data_read(tp, dp,
xfs_dir2_db_to_da(mp, newdb),
- -1, &curbp, XFS_DATA_FORK, NULL);
+ -1, &curbp);
if (error)
return error;
}
@@ -1692,8 +1692,8 @@ xfs_dir2_node_addname_int(
/*
* Read the data block in.
*/
- error = xfs_da_read_buf(tp, dp, xfs_dir2_db_to_da(mp, dbno),
- -1, &dbp, XFS_DATA_FORK, NULL);
+ error = xfs_dir2_data_read(tp, dp, xfs_dir2_db_to_da(mp, dbno),
+ -1, &dbp);
if (error)
return error;
hdr = dbp->b_addr;
diff --git a/fs/xfs/xfs_dir2_priv.h b/fs/xfs/xfs_dir2_priv.h
index 263a6328791..71ec8283910 100644
--- a/fs/xfs/xfs_dir2_priv.h
+++ b/fs/xfs/xfs_dir2_priv.h
@@ -46,6 +46,8 @@ extern int xfs_dir2_leaf_to_block(struct xfs_da_args *args,
#define xfs_dir2_data_check(dp,bp)
#endif
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);
extern struct xfs_dir2_data_free *
xfs_dir2_data_freeinsert(struct xfs_dir2_data_hdr *hdr,