[PATCH] net/ncsi: Add NCSI OEM command for FB Tiogapass

Justin.Lee1 at Dell.com Justin.Lee1 at Dell.com
Thu Sep 27 06:39:38 AEST 2018

> >  As I understand Justin's version adds a generic handler, using the NCSI
> >  Netlink interface to pass OEM commands and responses to and from
> >  userspace, which does the actual packet handling.
> Thanks for the direction Sam! Justin, if you don't mind, can you share the patches you have to add the support? This actually would solve a few other things we are trying to accomplish.

Basically, I add a new flag to indicate the request is coming from the Netlink interface to allow the command handler and response handler to react.

The work flow is as below. 

User space application -> Netlink interface (msg) -> new Netlink handler - ncsi_send_cmd_nl() - ncsi_xmit_cmd()

Response received - ncsi_rcv_rsp() -> internal response handler - ncsi_rsp_handler_xxx() -> ncsi_send_netlink_rsp () -> Netlink interface (msg) -> user space application
Command timeout - ncsi_request_timeout() -> ncsi_send_netlink_timeout () -> Netlink interface (msg with zero data length) -> user space application

Detected error -> ncsi_send_netlink_err () -> Netlink interface (err msg) -> user space application

I will clean up some code and send out the patch. 


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