Commit c12b2704 authored by Guangguan Wang's avatar Guangguan Wang Committed by Paolo Abeni
Browse files

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



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: default avatarGuangguan Wang <guangguan.wang@linux.alibaba.com>
Reviewed-by: default avatarWen Gu <guwen@linux.alibaba.com>
Reviewed-by: default avatarDust Li <dust.li@linux.alibaba.com>
Reviewed-by: default avatarD. Wythe <alibuda@linux.alibaba.com>
Reviewed-by: default avatarWenjia Zhang <wenjia@linux.ibm.com>
Reviewed-by: default avatarHalil Pasic <pasic@linux.ibm.com>
Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent 27ef6a99

net/smc/af_smc.c

+4 −1
Original line number Diff line number Diff line
@@ -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;