Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 1fcbac58 authored by Yan Zheng's avatar Yan Zheng Committed by Chris Mason
Browse files

Btrfs: find_free_dev_extent doesn't handle holes at the start of the device 



find_free_dev_extent does not properly handle the case where
the device is not complete free, and there is a free extent
at the beginning of the device.

Signed-off-by: default avatarYan Zheng <zheng.yan@oracle.com>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 20736aba

fs/btrfs/volumes.c

+7 −3
Original line number Diff line number Diff line
@@ -758,9 +758,13 @@ static noinline int find_free_dev_extent(struct btrfs_trans_handle *trans, 
	ret = btrfs_search_slot(trans, root, &key, path, 0, 0);

	if (ret < 0)

		goto error;

	ret = btrfs_previous_item(root, path, 0, key.type);

	if (ret > 0) {

		ret = btrfs_previous_item(root, path, key.objectid, key.type);

		if (ret < 0)

			goto error;

		if (ret > 0)

			start_found = 1;

	}

	l = path->nodes[0];

	btrfs_item_key_to_cpu(l, &key, path->slots[0]);

	while (1) {