net: diag: support SOCK_DESTROY for UDP sockets
This implements SOCK_DESTROY for UDP sockets similar to what was done
for TCP with commit c1e64e298b8ca ("net: diag: Support destroying TCP
sockets.") A process with a UDP socket targeted for destroy is awakened
and recvmsg fails with ECONNABORTED.
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 8f5f7f6..e9ffc27b 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -2193,6 +2193,20 @@
}
EXPORT_SYMBOL(udp_poll);
+int udp_abort(struct sock *sk, int err)
+{
+ lock_sock(sk);
+
+ sk->sk_err = err;
+ sk->sk_error_report(sk);
+ udp_disconnect(sk, 0);
+
+ release_sock(sk);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(udp_abort);
+
struct proto udp_prot = {
.name = "UDP",
.owner = THIS_MODULE,
@@ -2224,6 +2238,7 @@
.compat_getsockopt = compat_udp_getsockopt,
#endif
.clear_sk = sk_prot_clear_portaddr_nulls,
+ .diag_destroy = udp_abort,
};
EXPORT_SYMBOL(udp_prot);
