On Wed, Jun 12, 2019 at 07:31:44PM +0300, roman.stratiienko@xxxxxxxxxxxxxxx wrote: > From: Roman Stratiienko <roman.stratiienko@xxxxxxxxxxxxxxx> > > Adding support to nbd to use it as a root device. This code essentially > provides a minimal nbd-client implementation within the kernel. It opens > a socket and makes the negotiation with the server. Afterwards it passes > the socket to the normal nbd-code to handle the connection. > > The arguments for the server are passed via kernel command line. > The kernel command line has the format > 'nbdroot=[<SERVER_IP>:]<SERVER_PORT>/<EXPORT_NAME>'. > SERVER_IP is optional. If it is not available it will use the > root_server_addr transmitted through DHCP. > > Based on those arguments, the connection to the server is established > and is connected to the nbd0 device. The rootdevice therefore is > root=/dev/nbd0. > > Patch was initialy posted by Markus Pargmann <mpa@xxxxxxxxxxxxxx> > and can be found at https://lore.kernel.org/patchwork/patch/532556/ > > Change-Id: I78f7313918bf31b9dc01a74a42f0f068bede312c > Signed-off-by: Roman Stratiienko <roman.stratiienko@xxxxxxxxxxxxxxx> > Reviewed-by: Aleksandr Bulyshchenko <A.Bulyshchenko@xxxxxxxxxxxxxxx> Just throw nbd-client in your initramfs. Every nbd server has it's own handshake protocol, embedding one particular servers handshake protocol into the kernel isn't the answer here. Thanks, Josef
