From 527e8d8fe0908d5c64adf583af9dec3dff723f05 Mon Sep 17 00:00:00 2001 From: Filip Bozuta Date: Sun, 23 Aug 2020 21:50:08 +0200 Subject: linux-user: Add support for a group of btrfs ioctls used for snapshots MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch implements functionality for following ioctls: BTRFS_IOC_SNAP_CREATE - Creating a subvolume snapshot Create a snapshot of a btrfs subvolume. The snapshot is created using the ioctl's third argument that is a pointer to a 'struct btrfs_ioctl_vol_args' (which was mentioned in the previous patch). Before calling this ioctl, the fields of the structure should be filled with aproppriate values for the file descriptor and path of the subvolume for which the snapshot is to be created. BTRFS_IOC_SNAP_DESTROY - Removing a subvolume snapshot Delete a snapshot of a btrfs subvolume. The snapshot is deleted using the ioctl's third argument that is a pointer to a 'struct btrfs_ioctl_vol_args' (which was mentioned in the previous patch). Before calling this ioctl, the fields of the structure should be filled with aproppriate values for the file descriptor and path of the subvolume for which the snapshot is to be deleted. Implementation notes: Since the thunk type 'struct btrfs_ioctl_vol_args' is defined in the previous patch, the implementation for these ioctls was straightforward. Signed-off-by: Filip Bozuta Tested-by: Daniel P. Berrangé Message-Id: <20200823195014.116226-3-Filip.Bozuta@syrmia.com> Signed-off-by: Laurent Vivier --- linux-user/syscall_types.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'linux-user/syscall_types.h') diff --git a/linux-user/syscall_types.h b/linux-user/syscall_types.h index 0ce58d7772..853b91d212 100644 --- a/linux-user/syscall_types.h +++ b/linux-user/syscall_types.h @@ -358,7 +358,8 @@ STRUCT(blkpg_partition, MK_ARRAY(TYPE_CHAR, BLKPG_DEVNAMELTH), /* devname */ MK_ARRAY(TYPE_CHAR, BLKPG_VOLNAMELTH)) /* volname */ -#ifdef BTRFS_IOC_SUBVOL_CREATE +#if defined(BTRFS_IOC_SUBVOL_CREATE) || defined(BTRFS_IOC_SNAP_CREATE) || \ + defined(BTRFS_IOC_SNAP_DESTROY) STRUCT(btrfs_ioctl_vol_args, TYPE_LONGLONG, /* fd */ MK_ARRAY(TYPE_CHAR, BTRFS_PATH_NAME_MAX + 1)) /* name */ -- cgit 1.4.1