From 78476d315e190533757ab894255c4f2c2f254bce Mon Sep 17 00:00:00 2001 From: Jeremy Kerr Date: Fri, 29 Oct 2021 11:01:44 +0800 Subject: mctp: Add flow extension to skb This change adds a new skb extension for MCTP, to represent a request/response flow. The intention is to use this in a later change to allow i2c controllers to correctly configure a multiplexer over a flow. Since we have a cleanup function in the core path (if an extension is present), we'll need to make CONFIG_MCTP a bool, rather than a tristate. Includes a fix for a build warning with clang: Reported-by: kernel test robot Signed-off-by: Jeremy Kerr Signed-off-by: David S. Miller --- include/net/mctp.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'include/net') diff --git a/include/net/mctp.h b/include/net/mctp.h index 23bec708f4c7..7a5ba801703c 100644 --- a/include/net/mctp.h +++ b/include/net/mctp.h @@ -189,6 +189,13 @@ static inline struct mctp_skb_cb *mctp_cb(struct sk_buff *skb) return (void *)(skb->cb); } +/* If CONFIG_MCTP_FLOWS, we may add one of these as a SKB extension, + * indicating the flow to the device driver. + */ +struct mctp_flow { + struct mctp_sk_key *key; +}; + /* Route definition. * * These are held in the pernet->mctp.routes list, with RCU protection for -- cgit v1.2.3