X-Git-Url: http://git.osdn.net/view?a=blobdiff_plain;f=fs%2Fbtrfs%2Fdisk-io.c;h=73e4e5f5669231d5046ed6223bbdd919a0aa91ad;hb=d6719cf116b2fc8a7f51e84430c28febfac1eded;hp=5805b4f4702ea10ced9ce6f905a5d9164802f664;hpb=731b8667952815844de39412fb202292cf679f38;p=sagit-ice-cold%2Fkernel_xiaomi_msm8998.git

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 5805b4f4702e..73e4e5f56692 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -523,9 +523,10 @@ static int check_tree_block_fsid(struct btrfs_fs_info *fs_info,
 }
 
 #define CORRUPT(reason, eb, root, slot)				\
-	btrfs_crit(root->fs_info, "corrupt leaf, %s: block=%llu,"	\
-		   "root=%llu, slot=%d", reason,			\
-	       btrfs_header_bytenr(eb),	root->objectid, slot)
+	btrfs_crit(root->fs_info, "corrupt %s, %s: block=%llu,"	\
+		   " root=%llu, slot=%d",			\
+		   btrfs_header_level(eb) == 0 ? "leaf" : "node",\
+		   reason, btrfs_header_bytenr(eb), root->objectid, slot)
 
 static noinline int check_leaf(struct btrfs_root *root,
 			       struct extent_buffer *leaf)
@@ -616,6 +617,10 @@ static noinline int check_leaf(struct btrfs_root *root,
 static int check_node(struct btrfs_root *root, struct extent_buffer *node)
 {
 	unsigned long nr = btrfs_header_nritems(node);
+	struct btrfs_key key, next_key;
+	int slot;
+	u64 bytenr;
+	int ret = 0;
 
 	if (nr == 0 || nr > BTRFS_NODEPTRS_PER_BLOCK(root)) {
 		btrfs_crit(root->fs_info,
@@ -623,7 +628,26 @@ static int check_node(struct btrfs_root *root, struct extent_buffer *node)
 			   node->start, root->objectid, nr);
 		return -EIO;
 	}
-	return 0;
+
+	for (slot = 0; slot < nr - 1; slot++) {
+		bytenr = btrfs_node_blockptr(node, slot);
+		btrfs_node_key_to_cpu(node, &key, slot);
+		btrfs_node_key_to_cpu(node, &next_key, slot + 1);
+
+		if (!bytenr) {
+			CORRUPT("invalid item slot", node, root, slot);
+			ret = -EIO;
+			goto out;
+		}
+
+		if (btrfs_comp_cpu_keys(&key, &next_key) >= 0) {
+			CORRUPT("bad key order", node, root, slot);
+			ret = -EIO;
+			goto out;
+		}
+	}
+out:
+	return ret;
 }
 
 static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio,