From 025c68186e07afaededa84143f1a22f273cd3f67 Mon Sep 17 00:00:00 2001 From: David Decotigny Date: Mon, 21 Mar 2016 10:15:35 -0700 Subject: [PATCH] netlink: add support for NIC driver ioctls By returning -ENOIOCTLCMD, sock_do_ioctl() falls back to calling dev_ioctl(), which provides support for NIC driver ioctls, which includes ethtool support. This is similar to the way ioctls are handled in udp.c or tcp.c. This removes the requirement that ethtool for example be tied to the support of a specific L3 protocol (ethtool uses an AF_INET socket today). Signed-off-by: David Decotigny Signed-off-by: David S. Miller --- net/netlink/af_netlink.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index c8416792cce0..215fc08c02ab 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -1033,6 +1033,14 @@ static int netlink_getname(struct socket *sock, struct sockaddr *addr, return 0; } +static int netlink_ioctl(struct socket *sock, unsigned int cmd, + unsigned long arg) +{ + /* try to hand this ioctl down to the NIC drivers. + */ + return -ENOIOCTLCMD; +} + static struct sock *netlink_getsockbyportid(struct sock *ssk, u32 portid) { struct sock *sock; @@ -2494,7 +2502,7 @@ static const struct proto_ops netlink_ops = { .accept = sock_no_accept, .getname = netlink_getname, .poll = datagram_poll, - .ioctl = sock_no_ioctl, + .ioctl = netlink_ioctl, .listen = sock_no_listen, .shutdown = sock_no_shutdown, .setsockopt = netlink_setsockopt, -- GitLab