From c1f9ec5776dd05eaf62cf6788ecdfc905dc8ec2b Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 28 May 2020 07:12:30 +0200 Subject: ipv4: add ip_sock_set_pktinfo Add a helper to directly set the IP_PKTINFO sockopt from kernel space without going through a fake uaccess. Signed-off-by: Christoph Hellwig Signed-off-by: David S. Miller --- net/ipv4/ip_sockglue.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'net/ipv4') diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c index aa115be11dcf..84ec3703c909 100644 --- a/net/ipv4/ip_sockglue.c +++ b/net/ipv4/ip_sockglue.c @@ -608,6 +608,14 @@ int ip_sock_set_mtu_discover(struct sock *sk, int val) } EXPORT_SYMBOL(ip_sock_set_mtu_discover); +void ip_sock_set_pktinfo(struct sock *sk) +{ + lock_sock(sk); + inet_sk(sk)->cmsg_flags |= IP_CMSG_PKTINFO; + release_sock(sk); +} +EXPORT_SYMBOL(ip_sock_set_pktinfo); + /* * Socket option code for IP. This is the end of the line after any * TCP,UDP etc options on an IP socket. -- cgit v1.2.3