Commit 68433b73 authored by Chris Mason's avatar Chris Mason
Browse files

Btrfs: EIO when we fail to read tree roots 



If we just get a plain IO error when we read tree roots, the code
wasn't properly sending that error up the chain.  This allowed mounts to
continue when they should failed, and allowed operations
on partially setup root structs.  The end result was usually oopsen
on spinlocks that hadn't been spun up correctly.

Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 3dd1462e

fs/btrfs/disk-io.c

+4 −1
Original line number Diff line number Diff line
@@ -1007,7 +1007,10 @@ static int find_and_setup_root(struct btrfs_root *tree_root, 
	blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item));

	root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),

				     blocksize, generation);

	BUG_ON(!root->node);

	if (!root->node || !btrfs_buffer_uptodate(root->node, generation)) {

		free_extent_buffer(root->node);

		return -EIO;

	}

	root->commit_root = btrfs_root_node(root);

	return 0;

}

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