[PATCHv5 for-rc1 v5 6/8] RDMA/rxe: add the support of net namespace

[Zhu Yanjun <yanjun.zhu@xxxxxxxxx>]

From: Zhu Yanjun <yanjun.zhu@xxxxxxxxx>

Originally init_net is used to indicate the current net namespace.
Currently more net namespaces are supported.

Tested-by: Rain River <rain.1986.08.12@xxxxxxxxx>
Signed-off-by: Zhu Yanjun <yanjun.zhu@xxxxxxxxx>
---
 drivers/infiniband/sw/rxe/rxe.c     |  2 +-
 drivers/infiniband/sw/rxe/rxe_net.c | 33 +++++++++++++++++------------
 drivers/infiniband/sw/rxe/rxe_net.h |  2 +-
 3 files changed, 22 insertions(+), 15 deletions(-)

diff --git a/drivers/infiniband/sw/rxe/rxe.c b/drivers/infiniband/sw/rxe/rxe.c
index e81c2164d77f..4a17e4a003f5 100644
--- a/drivers/infiniband/sw/rxe/rxe.c
+++ b/drivers/infiniband/sw/rxe/rxe.c
@@ -196,7 +196,7 @@ static int rxe_newlink(const char *ibdev_name, struct net_device *ndev)
 		goto err;
 	}
 
-	err = rxe_net_init();
+	err = rxe_net_init(ndev);
 	if (err)
 		return err;
 
diff --git a/drivers/infiniband/sw/rxe/rxe_net.c b/drivers/infiniband/sw/rxe/rxe_net.c
index b56e2c32fbf7..9af90587642a 100644
--- a/drivers/infiniband/sw/rxe/rxe_net.c
+++ b/drivers/infiniband/sw/rxe/rxe_net.c
@@ -32,7 +32,7 @@ static struct dst_entry *rxe_find_route4(struct rxe_qp *qp,
 	memcpy(&fl.daddr, daddr, sizeof(*daddr));
 	fl.flowi4_proto = IPPROTO_UDP;
 
-	rt = ip_route_output_key(&init_net, &fl);
+	rt = ip_route_output_key(dev_net(ndev), &fl);
 	if (IS_ERR(rt)) {
 		rxe_dbg_qp(qp, "no route to %pI4\n", &daddr->s_addr);
 		return NULL;
@@ -56,7 +56,8 @@ static struct dst_entry *rxe_find_route6(struct rxe_qp *qp,
 		struct sock *sk;
 
 		rcu_read_lock();
-		sk = udp6_lib_lookup(&init_net, NULL, 0, &in6addr_any, htons(ROCE_V2_UDP_DPORT), 0);
+		sk = udp6_lib_lookup(dev_net(ndev), NULL, 0, &in6addr_any,
+				     htons(ROCE_V2_UDP_DPORT), 0);
 		rcu_read_unlock();
 		if (!sk) {
 			pr_info("file: %s +%d, error\n", __FILE__, __LINE__);
@@ -549,9 +550,13 @@ int rxe_net_add(const char *ibdev_name, struct net_device *ndev)
 void rxe_net_del(struct ib_device *dev)
 {
 	struct sock *sk;
+	struct rxe_dev *rdev;
+
+	rdev = container_of(dev, struct rxe_dev, ib_dev);
 
 	rcu_read_lock();
-	sk = udp4_lib_lookup(&init_net, 0, 0, htonl(INADDR_ANY), htons(ROCE_V2_UDP_DPORT), 0);
+	sk = udp4_lib_lookup(dev_net(rdev->ndev), 0, 0, htonl(INADDR_ANY),
+			     htons(ROCE_V2_UDP_DPORT), 0);
 	rcu_read_unlock();
 	if (!sk)
 		return;
@@ -564,7 +569,8 @@ void rxe_net_del(struct ib_device *dev)
 		rxe_release_udp_tunnel(sk->sk_socket);
 
 	rcu_read_lock();
-	sk = udp6_lib_lookup(&init_net, NULL, 0, &in6addr_any, htons(ROCE_V2_UDP_DPORT), 0);
+	sk = udp6_lib_lookup(dev_net(rdev->ndev), NULL, 0, &in6addr_any,
+			     htons(ROCE_V2_UDP_DPORT), 0);
 	rcu_read_unlock();
 	if (!sk)
 		return;
@@ -636,6 +642,7 @@ static int rxe_notify(struct notifier_block *not_blk,
 	switch (event) {
 	case NETDEV_UNREGISTER:
 		ib_unregister_device_queued(&rxe->ib_dev);
+		rxe_net_del(&rxe->ib_dev);
 		break;
 	case NETDEV_UP:
 		rxe_port_up(rxe);
@@ -669,19 +676,19 @@ static struct notifier_block rxe_net_notifier = {
 	.notifier_call = rxe_notify,
 };
 
-static int rxe_net_ipv4_init(void)
+static int rxe_net_ipv4_init(struct net_device *ndev)
 {
 	struct sock *sk;
 	struct socket *sock;
 
 	rcu_read_lock();
-	sk = udp4_lib_lookup(&init_net, 0, 0, htonl(INADDR_ANY),
+	sk = udp4_lib_lookup(dev_net(ndev), 0, 0, htonl(INADDR_ANY),
 			     htons(ROCE_V2_UDP_DPORT), 0);
 	rcu_read_unlock();
 	if (sk)
 		return 0;
 
-	sock = rxe_setup_udp_tunnel(&init_net, htons(ROCE_V2_UDP_DPORT), false);
+	sock = rxe_setup_udp_tunnel(dev_net(ndev), htons(ROCE_V2_UDP_DPORT), false);
 	if (IS_ERR(sock)) {
 		pr_err("Failed to create IPv4 UDP tunnel\n");
 		return -1;
@@ -690,20 +697,20 @@ static int rxe_net_ipv4_init(void)
 	return 0;
 }
 
-static int rxe_net_ipv6_init(void)
+static int rxe_net_ipv6_init(struct net_device *ndev)
 {
 #if IS_ENABLED(CONFIG_IPV6)
 	struct sock *sk;
 	struct socket *sock;
 
 	rcu_read_lock();
-	sk = udp6_lib_lookup(&init_net, NULL, 0, &in6addr_any,
+	sk = udp6_lib_lookup(dev_net(ndev), NULL, 0, &in6addr_any,
 			     htons(ROCE_V2_UDP_DPORT), 0);
 	rcu_read_unlock();
 	if (sk)
 		return 0;
 
-	sock = rxe_setup_udp_tunnel(&init_net, htons(ROCE_V2_UDP_DPORT), true);
+	sock = rxe_setup_udp_tunnel(dev_net(ndev), htons(ROCE_V2_UDP_DPORT), true);
 	if (PTR_ERR(sock) == -EAFNOSUPPORT) {
 		pr_warn("IPv6 is not supported, can not create a UDPv6 socket\n");
 		return 0;
@@ -735,14 +742,14 @@ void rxe_net_exit(void)
 	unregister_netdevice_notifier(&rxe_net_notifier);
 }
 
-int rxe_net_init(void)
+int rxe_net_init(struct net_device *ndev)
 {
 	int err;
 
-	err = rxe_net_ipv4_init();
+	err = rxe_net_ipv4_init(ndev);
 	if (err)
 		return err;
-	err = rxe_net_ipv6_init();
+	err = rxe_net_ipv6_init(ndev);
 	if (err)
 		goto err_out;
 	return 0;
diff --git a/drivers/infiniband/sw/rxe/rxe_net.h b/drivers/infiniband/sw/rxe/rxe_net.h
index 027b20e1bab6..56249677d692 100644
--- a/drivers/infiniband/sw/rxe/rxe_net.h
+++ b/drivers/infiniband/sw/rxe/rxe_net.h
@@ -15,7 +15,7 @@ int rxe_net_add(const char *ibdev_name, struct net_device *ndev);
 void rxe_net_del(struct ib_device *dev);
 
 int rxe_register_notifier(void);
-int rxe_net_init(void);
+int rxe_net_init(struct net_device *ndev);
 void rxe_net_exit(void);
 
 #endif /* RXE_NET_H */
-- 
2.27.0