[PATCH linux dev-6.12 11/14] net: mctp: remove routes by netid, not by device

[Marc Olberding]

From: Jeremy Kerr <jk at codeconstruct.com.au>

In upcoming changes, a route may not have a device associated. Since the
route is matched on the (network, eid) tuple, pass the netid itself into
mctp_route_remove.

Signed-off-by: Jeremy Kerr <jk at codeconstruct.com.au>
Link: https://patch.msgid.link/20250702-dev-forwarding-v5-11-1468191da8a4@codeconstruct.com.au
Signed-off-by: Paolo Abeni <pabeni at redhat.com>

(cherry picked from commit 4a1de053d7f0940936f6602ad53fe077bb10ff7f)
---
 net/mctp/route.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/net/mctp/route.c b/net/mctp/route.c
index 66395f782759b6a2131342fda099fe5d7cdc4c38..f96265acf16f4ecedad7a3edf2367cfc7f56be7f 100644
--- a/net/mctp/route.c
+++ b/net/mctp/route.c
@@ -1085,6 +1085,11 @@ int mctp_local_output(struct sock *sk, struct mctp_dst *dst,
 	return rc;
 }
 
+static unsigned int mctp_route_netid(struct mctp_route *rt)
+{
+	return rt->dev->net;
+}
+
 /* route management */
 static int mctp_route_add(struct net *net, struct mctp_dev *mdev,
 			  mctp_eid_t daddr_start, unsigned int daddr_extent,
@@ -1137,7 +1142,7 @@ static int mctp_route_add(struct net *net, struct mctp_dev *mdev,
 	return 0;
 }
 
-static int mctp_route_remove(struct net *net, struct mctp_dev *mdev,
+static int mctp_route_remove(struct net *net, unsigned int netid,
 			     mctp_eid_t daddr_start, unsigned int daddr_extent,
 			     unsigned char type)
 {
@@ -1154,7 +1159,7 @@ static int mctp_route_remove(struct net *net, struct mctp_dev *mdev,
 	ASSERT_RTNL();
 
 	list_for_each_entry_safe(rt, tmp, &net->mctp.routes, list) {
-		if (rt->dev == mdev &&
+		if (mctp_route_netid(rt) == netid &&
 		    rt->min == daddr_start && rt->max == daddr_end &&
 		    rt->type == type) {
 			list_del_rcu(&rt->list);
@@ -1174,7 +1179,8 @@ int mctp_route_add_local(struct mctp_dev *mdev, mctp_eid_t addr)
 
 int mctp_route_remove_local(struct mctp_dev *mdev, mctp_eid_t addr)
 {
-	return mctp_route_remove(dev_net(mdev->dev), mdev, addr, 0, RTN_LOCAL);
+	return mctp_route_remove(dev_net(mdev->dev), mdev->net,
+				 addr, 0, RTN_LOCAL);
 }
 
 /* removes all entries for a given device */
@@ -1394,7 +1400,7 @@ static int mctp_delroute(struct sk_buff *skb, struct nlmsghdr *nlh,
 	if (rtm->rtm_type != RTN_UNICAST)
 		return -EINVAL;
 
-	rc = mctp_route_remove(net, mdev, daddr_start, rtm->rtm_dst_len,
+	rc = mctp_route_remove(net, mdev->net, daddr_start, rtm->rtm_dst_len,
 			       RTN_UNICAST);
 	return rc;
 }

-- 
2.34.1