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Message-ID: <632ac6bb-6cf7-d1c6-880b-c341bd55943c@linux.dev>
Date: Thu, 23 Feb 2023 21:14:02 +0800
From: Zhu Yanjun <yanjun.zhu@...ux.dev>
To: Zhu Yanjun <yanjun.zhu@...el.com>, jgg@...pe.ca, leon@...nel.org,
zyjzyj2000@...il.com, linux-rdma@...r.kernel.org, parav@...dia.com,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Cc: Zhu Yanjun <yanjun.zhu@...ux.dev>
Subject: Re: [PATCHv3 6/8] RDMA/rxe: add the support of net namespace
在 2023/2/14 14:06, Zhu Yanjun 写道:
> From: Zhu Yanjun <yanjun.zhu@...ux.dev>
>
> Originally init_net is used to indicate the current net namespace.
> Currently more net namespaces are supported.
>
> Signed-off-by: Zhu Yanjun <yanjun.zhu@...ux.dev>
Add netdev@...r.kernel.org.
Zhu Yanjun
> ---
> 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 */
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