@@ -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,
@@ -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);
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> --- include/linux/netlink.h | 1 + net/netlink/af_netlink.c | 8 ++++++++ 2 files changed, 9 insertions(+)