From 801f87469ee8d97af5997ef52188bb0e1908b110 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 23 Aug 2018 10:48:13 +0200 Subject: netlink: add nl_set_extack_cookie_u64() Add a helper function nl_set_extack_cookie_u64() to use a u64 as the netlink extended ACK cookie, to avoid having to open-code it in any users of the cookie. A u64 should be sufficient for most subsystems though we allow for up to 20 bytes right now. This also matches the cookies in nl80211 where I intend to use this. Signed-off-by: Johannes Berg Acked-by: David S. Miller Signed-off-by: Johannes Berg --- include/linux/netlink.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'include/linux/netlink.h') diff --git a/include/linux/netlink.h b/include/linux/netlink.h index 4da90a6ab536..0b83dbae0a57 100644 --- a/include/linux/netlink.h +++ b/include/linux/netlink.h @@ -110,6 +110,15 @@ struct netlink_ext_ack { } \ } while (0) +static inline void nl_set_extack_cookie_u64(struct netlink_ext_ack *extack, + u64 cookie) +{ + u64 __cookie = cookie; + + memcpy(extack->cookie, &__cookie, sizeof(__cookie)); + extack->cookie_len = sizeof(__cookie); +} + extern void netlink_kernel_release(struct sock *sk); extern int __netlink_change_ngroups(struct sock *sk, unsigned int groups); extern int netlink_change_ngroups(struct sock *sk, unsigned int groups); -- cgit