Add block device freeze and thaw holder operations. Follow-up patches will implement block device freeze and thaw based on stuct blk_holder_ops. Link: https://lore.kernel.org/r/20230927-vfs-super-freeze-v1-2-ecc36d9ab4d9@xxxxxxxxxx Reviewed-by: "Darrick J. Wong" <djwong@xxxxxxxxxx> Reviewed-by: Jan Kara <jack@xxxxxxx> Signed-off-by: Christian Brauner <brauner@xxxxxxxxxx> --- include/linux/blkdev.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 7a3da7f44afb..1bc776335ff8 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1468,6 +1468,16 @@ struct blk_holder_ops { * Sync the file system mounted on the block device. */ void (*sync)(struct block_device *bdev); + + /* + * Freeze the file system mounted on the block device. + */ + int (*freeze)(struct block_device *bdev); + + /* + * Thaw the file system mounted on the block device. + */ + int (*thaw)(struct block_device *bdev); }; extern const struct blk_holder_ops fs_holder_ops; -- 2.34.1
