Btrfs: fix unzeroed members in fs_devices when creating a fs from seed fs

We forgot to zero some members in fs_devices when we create new fs_devices
from the one of the seed fs. It would cause the problem that we got wrong
chunk profile when allocating chunks. Fix it.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 5700ab0..50edbbc 100644 (file)
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1988,6 +1988,9 @@ static int btrfs_prepare_sprout(struct btrfs_root *root)
        fs_devices->seeding = 0;
        fs_devices->num_devices = 0;
        fs_devices->open_devices = 0;
+       fs_devices->missing_devices = 0;
+       fs_devices->num_can_discard = 0;
+       fs_devices->rotating = 0;
        fs_devices->seed = seed_devices;
 
        generate_random_uuid(fs_devices->fsid);