kernel/linux.git/include/net/mctpdevice.h, branch v6.19.11

net: mctp: Expose transport binding identifier via IFLA attribute

2024-11-09T17:04:54+00:00

MCTP control protocol implementations are transport binding dependent. Endpoint discovery is mandatory based on transport binding. Message timing requirements are specified in each respective transport binding specification. However, we currently have no means to get this information from MCTP links. Add a IFLA_MCTP_PHYS_BINDING netlink link attribute, which represents the transport type using the DMTF DSP0239-defined type numbers, returned as part of RTM_GETLINK data. We get an IFLA_MCTP_PHYS_BINDING attribute for each MCTP link, for example: - 0x00 (unspec) for loopback interface; - 0x01 (SMBus/I2C) for mctpi2c%d interfaces; and - 0x05 (serial) for mctpserial%d interfaces. Signed-off-by: Khang Nguyen Reviewed-by: Matt Johnston Link: https://patch.msgid.link/20241105071915.821871-1-khangng@os.amperecomputing.com Signed-off-by: Jakub Kicinski

mctp: Pass flow data & flow release events to drivers

2021-10-29T12:23:51+00:00

Now that we have an extension for MCTP data in skbs, populate the flow when a key has been created for the packet, and add a device driver operation to inform of flow destruction. Includes a fix for a warning with test builds: Reported-by: kernel test robot Signed-off-by: Jeremy Kerr Signed-off-by: David S. Miller

mctp: Add refcounts to mctp_dev

2021-09-29T10:00:11+00:00

Currently, we tie the struct mctp_dev lifetime to the underlying struct net_device, and hold/put that device as a proxy for a separate mctp_dev refcount. This works because we're not holding any references to the mctp_dev that are different from the netdev lifetime. In a future change we'll break that assumption though, as we'll need to hold mctp_dev references in a workqueue, which might live past the netdev unregister notification. In order to support that, this change introduces a refcount on the mctp_dev, currently taken by the net_device->mctp_ptr reference, and released on netdev unregister events. We can then use this for future references that might outlast the net device. Signed-off-by: Jeremy Kerr Signed-off-by: David S. Miller

mctp: Remove the repeated declaration

2021-08-25T10:23:14+00:00

Function 'mctp_dev_get_rtnl' is declared twice, so remove the repeated declaration. Cc: Jeremy Kerr Cc: Matt Johnston Cc: "David S. Miller" Cc: Jakub Kicinski Signed-off-by: Shaokun Zhang 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 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