kernel/linux.git/include/net/mctp.h, branch v5.15.89

mctp: unify sockaddr_mctp types

2021-10-18T12:47:09+00:00

Use the more precise __kernel_sa_family_t for smctp_family, to match struct sockaddr. Also, use an unsigned int for the network member; negative networks don't make much sense. We're already using unsigned for mctp_dev and mctp_skb_cb, but need to change mctp_sock to suit. Fixes: 60fc63981693 ("mctp: Add sockaddr_mctp to uapi") Signed-off-by: Jeremy Kerr Acked-by: Eugene Syromiatnikov Signed-off-by: David S. Miller

mctp: Specify route types, require rtm_type in RTM_*ROUTE messages

2021-08-11T23:01:17+00:00

This change adds a 'type' attribute to routes, which can be parsed from a RTM_NEWROUTE message. This will help to distinguish local vs. peer routes in a future change. This means userspace will need to set a correct rtm_type in RTM_NEWROUTE and RTM_DELROUTE messages; we currently only accept RTN_UNICAST. Signed-off-by: Jeremy Kerr Link: https://lore.kernel.org/r/20210810023834.2231088-1-jk@codeconstruct.com.au Signed-off-by: Jakub Kicinski

mctp: Allow per-netns default networks

2021-07-29T14:06:50+00:00

Currently we have a compile-time default network (MCTP_INITIAL_DEFAULT_NET). This change introduces a default_net field on the net namespace, allowing future configuration for new interfaces. Signed-off-by: Matt Johnston Signed-off-by: David S. Miller

mctp: Implement message fragmentation & reassembly

2021-07-29T14:06:50+00:00

This change implements MCTP fragmentation (based on route & device MTU), and corresponding reassembly. The MCTP specification only allows for fragmentation on the originating message endpoint, and reassembly on the destination endpoint - intermediate nodes do not need to reassemble/refragment. Consequently, we only fragment in the local transmit path, and reassemble locally-bound packets. Messages are required to be in-order, so we simply cancel reassembly on out-of-order or missing packets. In the fragmentation path, we just break up the message into MTU-sized fragments; the skb structure is a simple copy for now, which we can later improve with a shared data implementation. For reassembly, we keep track of incoming message fragments using the existing tag infrastructure, allocating a key on the (src,dest,tag) tuple, and reassembles matching fragments into a skb->frag_list. Signed-off-by: Jeremy Kerr Signed-off-by: David S. Miller

mctp: Populate socket implementation

2021-07-29T14:06:50+00:00

Start filling-out the socket syscalls: bind, sendmsg & recvmsg. This requires an input route implementation, so we add to mctp_route_input, allowing lookups on binds & message tags. This just handles single-packet messages at present, we will add fragmentation in a future change. Signed-off-by: Jeremy Kerr Signed-off-by: David S. Miller

mctp: Add neighbour implementation

2021-07-29T14:06:50+00:00

Add an initial neighbour table implementation, to be used in the route output path. Signed-off-by: Matt Johnston Signed-off-by: David S. Miller

mctp: Add netlink route management

2021-07-29T14:06:50+00:00

This change adds RTM_GETROUTE, RTM_NEWROUTE & RTM_DELROUTE handlers, allowing management of the MCTP route table. Includes changes from Jeremy Kerr . Signed-off-by: Matt Johnston Signed-off-by: David S. Miller

mctp: Add initial routing framework

2021-07-29T14:06:50+00:00

Add a simple routing table, and a couple of route output handlers, and the mctp packet_type & handler. Includes changes from Matt Johnston . Signed-off-by: Jeremy Kerr Signed-off-by: David S. Miller

mctp: Add device handling and netlink interface

2021-07-29T14:06:50+00:00

This change adds the infrastructure for managing MCTP netdevices; we add a pointer to the AF_MCTP-specific data to struct netdevice, and hook up the rtnetlink operations for adding and removing addresses. Includes changes from Matt Johnston . Signed-off-by: Jeremy Kerr Signed-off-by: David S. Miller

mctp: Add base packet definitions

2021-07-29T14:06:49+00:00

Simple packet header format as defined by DMTF DSP0236. Signed-off-by: Jeremy Kerr Signed-off-by: David S. Miller