Commit 59c28058 authored by Jakub Kicinski's avatar Jakub Kicinski Committed by David S. Miller
Browse files

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: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 133bbb18

include/linux/netlink.h

+1 −0
Original line number 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,

		 const struct netlink_ext_ack *extack);

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_broadcast(struct sock *ssk, struct sk_buff *skb, __u32 portid,

net/netlink/af_netlink.c

+8 −0
Original line number 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);



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)

{

	struct netlink_sock *nlk = nlk_sk(sk);

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