Btrfs: Fix crash on read failures at mount
authorDavid Woodhouse <dwmw2@infradead.org>
Wed, 22 Jul 2009 20:52:13 +0000 (16:52 -0400)
committerChris Mason <chris.mason@oracle.com>
Wed, 22 Jul 2009 20:52:13 +0000 (16:52 -0400)
If the tree roots hit read errors during mount, btrfs is not properly
erroring out.  We need to check the uptodate bits after
reading in the tree root node.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
fs/btrfs/disk-io.c

index 0d50d49..55d9d18 100644 (file)
@@ -1783,6 +1783,11 @@ struct btrfs_root *open_ctree(struct super_block *sb,
                                           btrfs_super_chunk_root(disk_super),
                                           blocksize, generation);
        BUG_ON(!chunk_root->node);
+       if (!test_bit(EXTENT_BUFFER_UPTODATE, &chunk_root->node->bflags)) {
+               printk(KERN_WARNING "btrfs: failed to read chunk root on %s\n",
+                      sb->s_id);
+               goto fail_chunk_root;
+       }
        btrfs_set_root_node(&chunk_root->root_item, chunk_root->node);
        chunk_root->commit_root = btrfs_root_node(chunk_root);
 
@@ -1810,6 +1815,11 @@ struct btrfs_root *open_ctree(struct super_block *sb,
                                          blocksize, generation);
        if (!tree_root->node)
                goto fail_chunk_root;
+       if (!test_bit(EXTENT_BUFFER_UPTODATE, &tree_root->node->bflags)) {
+               printk(KERN_WARNING "btrfs: failed to read tree root on %s\n",
+                      sb->s_id);
+               goto fail_tree_root;
+       }
        btrfs_set_root_node(&tree_root->root_item, tree_root->node);
        tree_root->commit_root = btrfs_root_node(tree_root);