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Commit 83df7c1d authored by Chris Mason's avatar Chris Mason Committed by David Woodhouse
Browse files

Btrfs: Make sure to cow the root during a snapshot 



Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 2cc58cf2

fs/btrfs/inode.c

+2 −0
Original line number Diff line number Diff line
@@ -2096,6 +2096,7 @@ static int create_snapshot(struct btrfs_root *root, char *name, int namelen) 
	struct btrfs_trans_handle *trans;

	struct btrfs_key key;

	struct btrfs_root_item new_root_item;

	struct buffer_head *tmp;

	int ret;

	int err;

	u64 objectid;
@@ -2123,6 +2124,7 @@ static int create_snapshot(struct btrfs_root *root, char *name, int namelen) 
	key.offset = 1;

	key.flags = 0;

	btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);

	btrfs_cow_block(trans, root, root->node, NULL, 0, &tmp);

	btrfs_set_root_blocknr(&new_root_item, bh_blocknr(root->node));



	ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key,