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authorAlbert Huang <huangjie.albert@bytedance.com>2023-10-11 15:48:51 +0800
committerJakub Kicinski <kuba@kernel.org>2023-10-13 16:52:02 -0700
commitc68681ae46eaaa1640b52fe366d21a93b2185df5 (patch)
tree9543a488783dfe6d8fcd717b69d5a01e95525a5f /net
parent419ce133ab928ab5efd7b50b2ef36ddfd4eadbd2 (diff)
net/smc: fix smc clc failed issue when netdevice not in init_net
If the netdevice is within a container and communicates externally through network technologies such as VxLAN, we won't be able to find routing information in the init_net namespace. To address this issue, we need to add a struct net parameter to the smc_ib_find_route function. This allow us to locate the routing information within the corresponding net namespace, ensuring the correct completion of the SMC CLC interaction. Fixes: e5c4744cfb59 ("net/smc: add SMC-Rv2 connection establishment") Signed-off-by: Albert Huang <huangjie.albert@bytedance.com> Reviewed-by: Dust Li <dust.li@linux.alibaba.com> Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com> Link: https://lore.kernel.org/r/20231011074851.95280-1-huangjie.albert@bytedance.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net')
-rw-r--r--net/smc/af_smc.c3
-rw-r--r--net/smc/smc_ib.c7
-rw-r--r--net/smc/smc_ib.h2
3 files changed, 7 insertions, 5 deletions
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index bacdd971615e..7a874da90c7f 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -1201,6 +1201,7 @@ static int smc_connect_rdma_v2_prepare(struct smc_sock *smc,
(struct smc_clc_msg_accept_confirm_v2 *)aclc;
struct smc_clc_first_contact_ext *fce =
smc_get_clc_first_contact_ext(clc_v2, false);
+ struct net *net = sock_net(&smc->sk);
int rc;
if (!ini->first_contact_peer || aclc->hdr.version == SMC_V1)
@@ -1210,7 +1211,7 @@ static int smc_connect_rdma_v2_prepare(struct smc_sock *smc,
memcpy(ini->smcrv2.nexthop_mac, &aclc->r0.lcl.mac, ETH_ALEN);
ini->smcrv2.uses_gateway = false;
} else {
- if (smc_ib_find_route(smc->clcsock->sk->sk_rcv_saddr,
+ if (smc_ib_find_route(net, smc->clcsock->sk->sk_rcv_saddr,
smc_ib_gid_to_ipv4(aclc->r0.lcl.gid),
ini->smcrv2.nexthop_mac,
&ini->smcrv2.uses_gateway))
diff --git a/net/smc/smc_ib.c b/net/smc/smc_ib.c
index 9b66d6aeeb1a..89981dbe46c9 100644
--- a/net/smc/smc_ib.c
+++ b/net/smc/smc_ib.c
@@ -193,7 +193,7 @@ bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport)
return smcibdev->pattr[ibport - 1].state == IB_PORT_ACTIVE;
}
-int smc_ib_find_route(__be32 saddr, __be32 daddr,
+int smc_ib_find_route(struct net *net, __be32 saddr, __be32 daddr,
u8 nexthop_mac[], u8 *uses_gateway)
{
struct neighbour *neigh = NULL;
@@ -205,7 +205,7 @@ int smc_ib_find_route(__be32 saddr, __be32 daddr,
if (daddr == cpu_to_be32(INADDR_NONE))
goto out;
- rt = ip_route_output_flow(&init_net, &fl4, NULL);
+ rt = ip_route_output_flow(net, &fl4, NULL);
if (IS_ERR(rt))
goto out;
if (rt->rt_uses_gateway && rt->rt_gw_family != AF_INET)
@@ -235,6 +235,7 @@ static int smc_ib_determine_gid_rcu(const struct net_device *ndev,
if (smcrv2 && attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP &&
smc_ib_gid_to_ipv4((u8 *)&attr->gid) != cpu_to_be32(INADDR_NONE)) {
struct in_device *in_dev = __in_dev_get_rcu(ndev);
+ struct net *net = dev_net(ndev);
const struct in_ifaddr *ifa;
bool subnet_match = false;
@@ -248,7 +249,7 @@ static int smc_ib_determine_gid_rcu(const struct net_device *ndev,
}
if (!subnet_match)
goto out;
- if (smcrv2->daddr && smc_ib_find_route(smcrv2->saddr,
+ if (smcrv2->daddr && smc_ib_find_route(net, smcrv2->saddr,
smcrv2->daddr,
smcrv2->nexthop_mac,
&smcrv2->uses_gateway))
diff --git a/net/smc/smc_ib.h b/net/smc/smc_ib.h
index 4df5f8c8a0a1..ef8ac2b7546d 100644
--- a/net/smc/smc_ib.h
+++ b/net/smc/smc_ib.h
@@ -112,7 +112,7 @@ void smc_ib_sync_sg_for_device(struct smc_link *lnk,
int smc_ib_determine_gid(struct smc_ib_device *smcibdev, u8 ibport,
unsigned short vlan_id, u8 gid[], u8 *sgid_index,
struct smc_init_info_smcrv2 *smcrv2);
-int smc_ib_find_route(__be32 saddr, __be32 daddr,
+int smc_ib_find_route(struct net *net, __be32 saddr, __be32 daddr,
u8 nexthop_mac[], u8 *uses_gateway);
bool smc_ib_is_valid_local_systemid(void);
int smcr_nl_get_device(struct sk_buff *skb, struct netlink_callback *cb);