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Message-Id: <20221006085921.1323148-3-yanjun.zhu@linux.dev>
Date: Thu, 6 Oct 2022 04:59:17 -0400
From: yanjun.zhu@...ux.dev
To: jgg@...pe.ca, leon@...nel.org, zyjzyj2000@...il.com,
linux-rdma@...r.kernel.org, yanjun.zhu@...ux.dev,
netdev@...r.kernel.org, davem@...emloft.net
Subject: [PATCHv2 2/6] RDMA/rxe: Support more rdma links in init_net
From: Zhu Yanjun <yanjun.zhu@...ux.dev>
In init_net, when several rdma links are created with the command "rdma
link add", newlink will check whether the udp port 4791 is listening or
not.
If not, creating a sock listening on udp port 4791. If yes, increasing the
reference count of the sock.
Signed-off-by: Zhu Yanjun <yanjun.zhu@...ux.dev>
---
drivers/infiniband/sw/rxe/rxe.c | 9 ++++-
drivers/infiniband/sw/rxe/rxe_net.c | 55 +++++++++++++++++++++--------
drivers/infiniband/sw/rxe/rxe_net.h | 1 +
3 files changed, 49 insertions(+), 16 deletions(-)
diff --git a/drivers/infiniband/sw/rxe/rxe.c b/drivers/infiniband/sw/rxe/rxe.c
index a22ff2207b42..84a07638f8df 100644
--- a/drivers/infiniband/sw/rxe/rxe.c
+++ b/drivers/infiniband/sw/rxe/rxe.c
@@ -8,6 +8,7 @@
#include <net/addrconf.h>
#include "rxe.h"
#include "rxe_loc.h"
+#include "rxe_net.h"
MODULE_AUTHOR("Bob Pearson, Frank Zago, John Groves, Kamal Heib");
MODULE_DESCRIPTION("Soft RDMA transport");
@@ -205,7 +206,7 @@ static int rxe_newlink(const char *ibdev_name, struct net_device *ndev)
return err;
}
-static struct rdma_link_ops rxe_link_ops = {
+struct rdma_link_ops rxe_link_ops = {
.type = "rxe",
.newlink = rxe_newlink,
};
@@ -215,6 +216,12 @@ static int __init rxe_module_init(void)
int err;
rdma_link_register(&rxe_link_ops);
+ err = rxe_register_notifier();
+ if (err) {
+ pr_err("Failed to register netdev notifier\n");
+ return -1;
+ }
+
pr_info("loaded\n");
return 0;
}
diff --git a/drivers/infiniband/sw/rxe/rxe_net.c b/drivers/infiniband/sw/rxe/rxe_net.c
index c53f4529f098..4772ea19c6e2 100644
--- a/drivers/infiniband/sw/rxe/rxe_net.c
+++ b/drivers/infiniband/sw/rxe/rxe_net.c
@@ -620,13 +620,23 @@ static struct notifier_block rxe_net_notifier = {
static int rxe_net_ipv4_init(void)
{
- recv_sockets.sk4 = rxe_setup_udp_tunnel(&init_net,
- htons(ROCE_V2_UDP_DPORT), false);
- if (IS_ERR(recv_sockets.sk4)) {
- recv_sockets.sk4 = NULL;
+ struct sock *sk;
+ struct socket *sock;
+
+ rcu_read_lock();
+ sk = udp4_lib_lookup(&init_net, 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);
+ if (IS_ERR(sock)) {
pr_err("Failed to create IPv4 UDP tunnel\n");
+ recv_sockets.sk4 = NULL;
return -1;
}
+ recv_sockets.sk4 = sock;
return 0;
}
@@ -634,24 +644,46 @@ static int rxe_net_ipv4_init(void)
static int rxe_net_ipv6_init(void)
{
#if IS_ENABLED(CONFIG_IPV6)
+ struct sock *sk;
+ struct socket *sock;
+
+ rcu_read_lock();
+ sk = udp6_lib_lookup(&init_net, NULL, 0, &in6addr_any,
+ htons(ROCE_V2_UDP_DPORT), 0);
+ rcu_read_unlock();
+ if (sk)
+ return 0;
- recv_sockets.sk6 = rxe_setup_udp_tunnel(&init_net,
- htons(ROCE_V2_UDP_DPORT), true);
- if (PTR_ERR(recv_sockets.sk6) == -EAFNOSUPPORT) {
+ sock = rxe_setup_udp_tunnel(&init_net, htons(ROCE_V2_UDP_DPORT), true);
+ if (PTR_ERR(sock) == -EAFNOSUPPORT) {
recv_sockets.sk6 = NULL;
pr_warn("IPv6 is not supported, can not create a UDPv6 socket\n");
return 0;
}
- if (IS_ERR(recv_sockets.sk6)) {
+ if (IS_ERR(sock)) {
recv_sockets.sk6 = NULL;
pr_err("Failed to create IPv6 UDP tunnel\n");
return -1;
}
+ recv_sockets.sk6 = sock;
#endif
return 0;
}
+int rxe_register_notifier(void)
+{
+ int err;
+
+ err = register_netdevice_notifier(&rxe_net_notifier);
+ if (err) {
+ pr_err("Failed to register netdev notifier\n");
+ return -1;
+ }
+
+ return 0;
+}
+
void rxe_net_exit(void)
{
rxe_release_udp_tunnel(recv_sockets.sk6);
@@ -663,19 +695,12 @@ int rxe_net_init(void)
{
int err;
- recv_sockets.sk6 = NULL;
-
err = rxe_net_ipv4_init();
if (err)
return err;
err = rxe_net_ipv6_init();
if (err)
goto err_out;
- err = register_netdevice_notifier(&rxe_net_notifier);
- if (err) {
- pr_err("Failed to register netdev notifier\n");
- goto err_out;
- }
return 0;
err_out:
rxe_net_exit();
diff --git a/drivers/infiniband/sw/rxe/rxe_net.h b/drivers/infiniband/sw/rxe/rxe_net.h
index 45d80d00f86b..a222c3eeae12 100644
--- a/drivers/infiniband/sw/rxe/rxe_net.h
+++ b/drivers/infiniband/sw/rxe/rxe_net.h
@@ -18,6 +18,7 @@ struct rxe_recv_sockets {
int rxe_net_add(const char *ibdev_name, struct net_device *ndev);
+int rxe_register_notifier(void);
int rxe_net_init(void);
void rxe_net_exit(void);
--
2.27.0
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