[PATCH net-next v7] net/ncsi: Extend NC-SI Netlink interface to allow user space to send NC-SI command

[Samuel Mendoza-Jonas]

On Thu, 2018-10-11 at 18:07 +0000, Justin.Lee1 at Dell.com wrote:
> The new command (NCSI_CMD_SEND_CMD) is added to allow user space application
> to send NC-SI command to the network card.
> Also, add a new attribute (NCSI_ATTR_DATA) for transferring request and response.
> 
> The work flow is as below. 
> 
> Request:
> User space application
> 	-> Netlink interface (msg)
> 	-> new Netlink handler - ncsi_send_cmd_nl()
> 	-> ncsi_xmit_cmd()
> 
> Response:
> Response received - ncsi_rcv_rsp()
> 	-> internal response handler - ncsi_rsp_handler_xxx()
> 	-> ncsi_rsp_handler_netlink()
> 	-> 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
> 
> Error:
> Error detected
> 	-> ncsi_send_netlink_err ()
> 	-> Netlink interface (err msg)
> 	-> user space application
> 
> 
> Signed-off-by: Justin Lee <justin.lee1 at dell.com> 
> 

Reviewed-by: Samuel Mendoza-Jonas <sam at mendozajonas.com>