net: mctp: pass net into route creation

We may not have a mdev pointer, from which we currently extract the net.

Instead, pass the net directly.

Signed-off-by: Jeremy Kerr <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Paolo Abeni <[e-mail]>

net/mctp/route.c

···
 }
 
 /* route management */
-static int mctp_route_add(struct mctp_dev *mdev, mctp_eid_t daddr_start,
-			  unsigned int daddr_extent, unsigned int mtu,
-			  unsigned char type)
+static int mctp_route_add(struct net *net, struct mctp_dev *mdev,
+			  mctp_eid_t daddr_start, unsigned int daddr_extent,
+			  unsigned int mtu, unsigned char type)
 {
 	int (*rtfn)(struct mctp_dst *dst, struct sk_buff *skb);
-	struct net *net = dev_net(mdev->dev);
 	struct mctp_route *rt, *ert;
 
 	if (!mctp_address_unicast(daddr_start))
···
 	return 0;
 }
 
-static int mctp_route_remove(struct mctp_dev *mdev, mctp_eid_t daddr_start,
-			     unsigned int daddr_extent, unsigned char type)
+static int mctp_route_remove(struct net *net, struct mctp_dev *mdev,
+			     mctp_eid_t daddr_start, unsigned int daddr_extent,
+			     unsigned char type)
 {
-	struct net *net = dev_net(mdev->dev);
 	struct mctp_route *rt, *tmp;
 	mctp_eid_t daddr_end;
 	bool dropped;
···
 
 int mctp_route_add_local(struct mctp_dev *mdev, mctp_eid_t addr)
 {
-	return mctp_route_add(mdev, addr, 0, 0, RTN_LOCAL);
+	return mctp_route_add(dev_net(mdev->dev), mdev, addr, 0, 0, RTN_LOCAL);
 }
 
 int mctp_route_remove_local(struct mctp_dev *mdev, mctp_eid_t addr)
 {
-	return mctp_route_remove(mdev, addr, 0, RTN_LOCAL);
+	return mctp_route_remove(dev_net(mdev->dev), mdev, addr, 0, RTN_LOCAL);
 }
 
 /* removes all entries for a given device */
···
 /* Common part for RTM_NEWROUTE and RTM_DELROUTE parsing.
  * tb must hold RTA_MAX+1 elements.
  */
-static int mctp_route_nlparse(struct sk_buff *skb, struct nlmsghdr *nlh,
+static int mctp_route_nlparse(struct net *net, struct nlmsghdr *nlh,
 			      struct netlink_ext_ack *extack,
 			      struct nlattr **tb, struct rtmsg **rtm,
 			      struct mctp_dev **mdev, mctp_eid_t *daddr_start)
 {
-	struct net *net = sock_net(skb->sk);
 	struct net_device *dev;
 	unsigned int ifindex;
 	int rc;
···
 static int mctp_newroute(struct sk_buff *skb, struct nlmsghdr *nlh,
 			 struct netlink_ext_ack *extack)
 {
+	struct net *net = sock_net(skb->sk);
 	struct nlattr *tb[RTA_MAX + 1];
 	struct nlattr *tbx[RTAX_MAX + 1];
 	mctp_eid_t daddr_start;
···
 	unsigned int mtu;
 	int rc;
 
-	rc = mctp_route_nlparse(skb, nlh, extack, tb,
+	rc = mctp_route_nlparse(net, nlh, extack, tb,
 				&rtm, &mdev, &daddr_start);
 	if (rc < 0)
 		return rc;
···
 			mtu = nla_get_u32(tbx[RTAX_MTU]);
 	}
 
-	rc = mctp_route_add(mdev, daddr_start, rtm->rtm_dst_len, mtu,
+	rc = mctp_route_add(net, mdev, daddr_start, rtm->rtm_dst_len, mtu,
 			    rtm->rtm_type);
 	return rc;
 }
···
 static int mctp_delroute(struct sk_buff *skb, struct nlmsghdr *nlh,
 			 struct netlink_ext_ack *extack)
 {
+	struct net *net = sock_net(skb->sk);
 	struct nlattr *tb[RTA_MAX + 1];
 	mctp_eid_t daddr_start;
 	struct mctp_dev *mdev;
 	struct rtmsg *rtm;
 	int rc;
 
-	rc = mctp_route_nlparse(skb, nlh, extack, tb,
+	rc = mctp_route_nlparse(net, nlh, extack, tb,
 				&rtm, &mdev, &daddr_start);
 	if (rc < 0)
 		return rc;
···
 	if (rtm->rtm_type != RTN_UNICAST)
 		return -EINVAL;
 
-	rc = mctp_route_remove(mdev, daddr_start, rtm->rtm_dst_len, RTN_UNICAST);
+	rc = mctp_route_remove(net, mdev, daddr_start, rtm->rtm_dst_len,
+			       RTN_UNICAST);
 	return rc;
 }