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-rw-r--r--include/uapi/linux/btrfs.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/btrfs.h b/include/uapi/linux/btrfs.h
index 6f9c38ce45c7..2f47824e7a36 100644
--- a/include/uapi/linux/btrfs.h
+++ b/include/uapi/linux/btrfs.h
@@ -38,6 +38,7 @@ struct btrfs_ioctl_vol_args {
#define BTRFS_SUBVOL_QGROUP_INHERIT (1ULL << 2)
#define BTRFS_FSID_SIZE 16
#define BTRFS_UUID_SIZE 16
+#define BTRFS_UUID_UNPARSED_SIZE 37
#define BTRFS_QGROUP_INHERIT_SET_LIMITS (1ULL << 0)