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Message-Id: <20221006085921.1323148-6-yanjun.zhu@linux.dev>
Date: Thu, 6 Oct 2022 04:59:20 -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 5/6] RDMA/rxe: Replace global variable with sock lookup functions
From: Zhu Yanjun <yanjun.zhu@...ux.dev>
Originally a global variable is to keep the sock of udp listening
on port 4791. In fact, sock lookup functions can be used to get
the sock.
Signed-off-by: Zhu Yanjun <yanjun.zhu@...ux.dev>
---
drivers/infiniband/sw/rxe/rxe.c | 1 +
drivers/infiniband/sw/rxe/rxe_net.c | 58 ++++++++++++++++++++-------
drivers/infiniband/sw/rxe/rxe_net.h | 5 ---
drivers/infiniband/sw/rxe/rxe_verbs.h | 1 +
4 files changed, 45 insertions(+), 20 deletions(-)
diff --git a/drivers/infiniband/sw/rxe/rxe.c b/drivers/infiniband/sw/rxe/rxe.c
index 1b8b74ea84e9..933d8e129c47 100644
--- a/drivers/infiniband/sw/rxe/rxe.c
+++ b/drivers/infiniband/sw/rxe/rxe.c
@@ -74,6 +74,7 @@ static void rxe_init_device_param(struct rxe_dev *rxe)
rxe->ndev->dev_addr);
rxe->max_ucontext = RXE_MAX_UCONTEXT;
+ rxe->l_sk6 = NULL;
}
/* initialize port attributes */
diff --git a/drivers/infiniband/sw/rxe/rxe_net.c b/drivers/infiniband/sw/rxe/rxe_net.c
index 6e35566e933b..64b11faccfb4 100644
--- a/drivers/infiniband/sw/rxe/rxe_net.c
+++ b/drivers/infiniband/sw/rxe/rxe_net.c
@@ -18,8 +18,6 @@
#include "rxe_net.h"
#include "rxe_loc.h"
-static struct rxe_recv_sockets recv_sockets;
-
static struct dst_entry *rxe_find_route4(struct net_device *ndev,
struct in_addr *saddr,
struct in_addr *daddr)
@@ -49,6 +47,23 @@ static struct dst_entry *rxe_find_route6(struct net_device *ndev,
{
struct dst_entry *ndst;
struct flowi6 fl6 = { { 0 } };
+ struct rxe_dev *rdev;
+
+ rdev = rxe_get_dev_from_net(ndev);
+ if (!rdev->l_sk6) {
+ struct sock *sk;
+
+ rcu_read_lock();
+ sk = udp6_lib_lookup(&init_net, NULL, 0, &in6addr_any, htons(ROCE_V2_UDP_DPORT), 0);
+ rcu_read_unlock();
+ if (!sk) {
+ pr_info("file: %s +%d, error\n", __FILE__, __LINE__);
+ return (struct dst_entry *)sk;
+ }
+ __sock_put(sk);
+ rdev->l_sk6 = sk->sk_socket;
+ }
+
memset(&fl6, 0, sizeof(fl6));
fl6.flowi6_oif = ndev->ifindex;
@@ -56,8 +71,8 @@ static struct dst_entry *rxe_find_route6(struct net_device *ndev,
memcpy(&fl6.daddr, daddr, sizeof(*daddr));
fl6.flowi6_proto = IPPROTO_UDP;
- ndst = ipv6_stub->ipv6_dst_lookup_flow(sock_net(recv_sockets.sk6->sk),
- recv_sockets.sk6->sk, &fl6,
+ ndst = ipv6_stub->ipv6_dst_lookup_flow(dev_net(ndev),
+ rdev->l_sk6->sk, &fl6,
NULL);
if (IS_ERR(ndst)) {
pr_err_ratelimited("no route to %pI6\n", daddr);
@@ -530,15 +545,33 @@ int rxe_net_add(const char *ibdev_name, struct net_device *ndev)
#define SK_REF_FOR_TUNNEL 2
void rxe_net_del(struct ib_device *dev)
{
- if (refcount_read(&recv_sockets.sk6->sk->sk_refcnt) > SK_REF_FOR_TUNNEL)
- __sock_put(recv_sockets.sk6->sk);
+ struct sock *sk;
+
+ 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;
+
+ __sock_put(sk);
+
+ if (refcount_read(&sk->sk_refcnt) > SK_REF_FOR_TUNNEL)
+ __sock_put(sk);
else
- rxe_release_udp_tunnel(recv_sockets.sk6);
+ 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);
+ rcu_read_unlock();
+ if (!sk)
+ return;
+
+ __sock_put(sk);
- if (refcount_read(&recv_sockets.sk4->sk->sk_refcnt) > SK_REF_FOR_TUNNEL)
- __sock_put(recv_sockets.sk4->sk);
+ if (refcount_read(&sk->sk_refcnt) > SK_REF_FOR_TUNNEL)
+ __sock_put(sk);
else
- rxe_release_udp_tunnel(recv_sockets.sk4);
+ rxe_release_udp_tunnel(sk->sk_socket);
}
static void rxe_port_event(struct rxe_dev *rxe,
@@ -647,10 +680,8 @@ static int rxe_net_ipv4_init(void)
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;
}
@@ -670,17 +701,14 @@ static int rxe_net_ipv6_init(void)
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(sock)) {
- recv_sockets.sk6 = NULL;
pr_err("Failed to create IPv6 UDP tunnel\n");
return -1;
}
- recv_sockets.sk6 = sock;
#endif
return 0;
}
diff --git a/drivers/infiniband/sw/rxe/rxe_net.h b/drivers/infiniband/sw/rxe/rxe_net.h
index f48f22f3353b..027b20e1bab6 100644
--- a/drivers/infiniband/sw/rxe/rxe_net.h
+++ b/drivers/infiniband/sw/rxe/rxe_net.h
@@ -11,11 +11,6 @@
#include <net/if_inet6.h>
#include <linux/module.h>
-struct rxe_recv_sockets {
- struct socket *sk4;
- struct socket *sk6;
-};
-
int rxe_net_add(const char *ibdev_name, struct net_device *ndev);
void rxe_net_del(struct ib_device *dev);
diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.h b/drivers/infiniband/sw/rxe/rxe_verbs.h
index 96af3e054f4d..13b12f02a52e 100644
--- a/drivers/infiniband/sw/rxe/rxe_verbs.h
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.h
@@ -406,6 +406,7 @@ struct rxe_dev {
struct rxe_port port;
struct crypto_shash *tfm;
+ struct socket *l_sk6;
};
static inline void rxe_counter_inc(struct rxe_dev *rxe, enum rxe_counters index)
--
2.27.0
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