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net/smc: support ipv4 mapped ipv6 addr client for smc-r v2

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AF_INET6 is not supported for smc-r v2 client before, even if the
ipv6 addr is ipv4 mapped. Thus, when using AF_INET6, smc-r connection
will fallback to tcp, especially for java applications running smc-r.
This patch support ipv4 mapped ipv6 addr client for smc-r v2. Clients
using real global ipv6 addr is still not supported yet.

Signed-off-by: Guangguan Wang <guangguan.wang@linux.alibaba.com>
Reviewed-by: Wen Gu <guwen@linux.alibaba.com>
Reviewed-by: Dust Li <dust.li@linux.alibaba.com>
Reviewed-by: D. Wythe <alibuda@linux.alibaba.com>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Guangguan Wang 2024-12-11 10:30:55 +08:00 committed by Paolo Abeni
parent 27ef6a9981
commit c12b2704a6
1 changed files with 4 additions and 1 deletions
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5
net/smc/af_smc.c
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@ -1117,7 +1117,10 @@ static int smc_find_proposal_devices(struct smc_sock *smc,
ini->check_smcrv2 = true;
ini->smcrv2.saddr = smc->clcsock->sk->sk_rcv_saddr;
if (!(ini->smcr_version & SMC_V2) ||
smc->clcsock->sk->sk_family != AF_INET ||
#if IS_ENABLED(CONFIG_IPV6)
(smc->clcsock->sk->sk_family == AF_INET6 &&
!ipv6_addr_v4mapped(&smc->clcsock->sk->sk_v6_rcv_saddr)) ||
#endif
!smc_clc_ueid_count() ||
smc_find_rdma_device(smc, ini))
ini->smcr_version &= ~SMC_V2;