[PATCH net 03/10] net/smc: fix link lookup for new rdma connections

[Karsten Graul]

For new rdma connections the SMC server assigns the link and sends the
link data in the clc accept message. To match the correct link use not
only the qp_num but also the gid and the mac of the links. If there are
equal qp_nums for different links the wrong link would be chosen.

Reviewed-by: Ursula Braun <ubr...@linux.ibm.com>
Fixes: 0fb0b02bd6fd ("net/smc: adapt SMC client code to use the LLC flow")
Signed-off-by: Karsten Graul <kgr...@linux.ibm.com>
---
 net/smc/af_smc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index 903321543838..f80591567a3d 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -632,7 +632,9 @@ static int smc_connect_rdma(struct smc_sock *smc,
                for (i = 0; i < SMC_LINKS_PER_LGR_MAX; i++) {
                        struct smc_link *l = &smc->conn.lgr->lnk[i];
 
-                       if (l->peer_qpn == ntoh24(aclc->qpn)) {
+                       if (l->peer_qpn == ntoh24(aclc->qpn) &&
+                           !memcmp(l->peer_gid, &aclc->lcl.gid, SMC_GID_SIZE) 
&&
+                           !memcmp(l->peer_mac, &aclc->lcl.mac, 
sizeof(l->peer_mac))) {
                                link = l;
                                break;
                        }
-- 
2.17.1