[PATCH v4 4/6] dm: new ioctl DM_DEV_REMAP_CMD

New ioctl DM_DEV_REMAP_CMD allow to remap bio requests from regular block device to dm device. Signed-off-by: Sergei Shtepa --- drivers/md/dm-core.h | 20 ++ drivers/md/dm-ioctl.c | 39 drivers/md/dm.c | 376 +- include/uapi/l

Re: [PATCH v4 4/6] dm: new ioctl DM_DEV_REMAP_CMD

On Wed, Feb 03, 2021 at 06:53:56PM +0300, Sergei Shtepa wrote: > --- a/include/uapi/linux/dm-ioctl.h > +++ b/include/uapi/linux/dm-ioctl.h > @@ -214,6 +214,15 @@ struct dm_target_msg { > char message[0]; > }; > > +enum { > + REMAP_START_CMD = 1, > + REMAP_FINISH_CMD, Don't you nee