Commit 59c28058 authored Jan 18, 2019 by Jakub Kicinski Committed by David S. Miller Jan 19, 2019

net: netlink: add helper to retrieve NETLINK_F_STRICT_CHK



Dumps can read state of the NETLINK_F_STRICT_CHK flag from
a field in the callback structure.  For non-dump GET requests
we need a way to access the state of that flag from a socket.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 133bbb18

include/linux/netlink.h

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -126,6 +126,7 @@ void __netlink_clear_multicast_users(struct sock *sk, unsigned int group);
	void netlink_ack(struct sk_buff in_skb, struct nlmsghdr nlh, int err,		void netlink_ack(struct sk_buff in_skb, struct nlmsghdr nlh, int err,
	const struct netlink_ext_ack *extack);		const struct netlink_ext_ack *extack);
	int netlink_has_listeners(struct sock *sk, unsigned int group);		int netlink_has_listeners(struct sock *sk, unsigned int group);
			bool netlink_strict_get_check(struct sk_buff *skb);

	int netlink_unicast(struct sock ssk, struct sk_buff skb, __u32 portid, int nonblock);		int netlink_unicast(struct sock ssk, struct sk_buff skb, __u32 portid, int nonblock);
	int netlink_broadcast(struct sock ssk, struct sk_buff skb, __u32 portid,		int netlink_broadcast(struct sock ssk, struct sk_buff skb, __u32 portid,

net/netlink/af_netlink.c

+8 −0

Original line number	Original line	Diff line number	Diff line
	@@ -1371,6 +1371,14 @@ int netlink_has_listeners(struct sock *sk, unsigned int group)
	}		}
	EXPORT_SYMBOL_GPL(netlink_has_listeners);		EXPORT_SYMBOL_GPL(netlink_has_listeners);

			bool netlink_strict_get_check(struct sk_buff *skb)
			{
			const struct netlink_sock *nlk = nlk_sk(NETLINK_CB(skb).sk);

			return nlk->flags & NETLINK_F_STRICT_CHK;
			}
			EXPORT_SYMBOL_GPL(netlink_strict_get_check);

	static int netlink_broadcast_deliver(struct sock sk, struct sk_buff skb)		static int netlink_broadcast_deliver(struct sock sk, struct sk_buff skb)
	{		{
	struct netlink_sock *nlk = nlk_sk(sk);		struct netlink_sock *nlk = nlk_sk(sk);