[PATCH 2/5] libbtrfsutil: add IOC_SNAP_DESTROY_V2 to ioctl.h

[Marcos Paulo de Souza <marcos.souza.org@gmail.com>]

From: Marcos Paulo de Souza <mpdesouza@suse.com>

This ioctl will make possible to delete a subvolume/snapshot by using
the subvolume id.

Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
---
 libbtrfsutil/btrfs.h | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/libbtrfsutil/btrfs.h b/libbtrfsutil/btrfs.h
index c9a61b30..fe478ab1 100644
--- a/libbtrfsutil/btrfs.h
+++ b/libbtrfsutil/btrfs.h
@@ -36,12 +36,14 @@ struct btrfs_ioctl_vol_args {
 #define BTRFS_DEVICE_PATH_NAME_MAX 1024
 
 #define BTRFS_DEVICE_SPEC_BY_ID		(1ULL << 3)
+#define BTRFS_SUBVOL_BY_ID	(1ULL << 4)
 
 #define BTRFS_VOL_ARG_V2_FLAGS_SUPPORTED		\
 			(BTRFS_SUBVOL_CREATE_ASYNC |	\
 			BTRFS_SUBVOL_RDONLY |		\
 			BTRFS_SUBVOL_QGROUP_INHERIT |	\
-			BTRFS_DEVICE_SPEC_BY_ID)
+			BTRFS_DEVICE_SPEC_BY_ID |	\
+			BTRFS_SUBVOL_BY_ID)
 
 #define BTRFS_FSID_SIZE 16
 #define BTRFS_UUID_SIZE 16
@@ -118,7 +120,10 @@ struct btrfs_ioctl_vol_args_v2 {
 		__u64 unused[4];
 	};
 	union {
-		char name[BTRFS_SUBVOL_NAME_MAX + 1];
+		union {
+			char name[BTRFS_SUBVOL_NAME_MAX + 1];
+			__u64 subvolid;
+		};
 		__u64 devid;
 	};
 };
@@ -942,5 +947,7 @@ enum btrfs_err_code {
 				struct btrfs_ioctl_get_subvol_rootref_args)
 #define BTRFS_IOC_INO_LOOKUP_USER _IOWR(BTRFS_IOCTL_MAGIC, 62, \
 				struct btrfs_ioctl_ino_lookup_user_args)
+#define BTRFS_IOC_SNAP_DESTROY_V2 _IOW(BTRFS_IOCTL_MAGIC, 63, \
+				struct btrfs_ioctl_vol_args_v2)
 
 #endif /* _LINUX_BTRFS_H */
-- 
2.24.0