[PATCH] librdmacm/rsocket: Support IPV6_V6ONLY socket option

[Hefty, Sean]

Signed-off-by: Sean Hefty <sean.he...@intel.com>
---
Patch is dependent on proposed kernel changes.

 include/rdma/rdma_cma.h |    1 +
 src/rsocket.c           |   23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+), 0 deletions(-)

diff --git a/include/rdma/rdma_cma.h b/include/rdma/rdma_cma.h
index c0f83b1..1487f8f 100755
--- a/include/rdma/rdma_cma.h
+++ b/include/rdma/rdma_cma.h
@@ -650,6 +650,7 @@ enum {
 enum {
        RDMA_OPTION_ID_TOS       = 0,   /* uint8_t: RFC 2474 */
        RDMA_OPTION_ID_REUSEADDR = 1,   /* int: ~SO_REUSEADDR */
+       RDMA_OPTION_ID_AFONLY    = 2,   /* int: ~IPV6_V6ONLY */
        RDMA_OPTION_IB_PATH      = 1    /* struct ibv_path_data[] */
 };
 
diff --git a/src/rsocket.c b/src/rsocket.c
index a3c2c6a..860c63e 100644
--- a/src/rsocket.c
+++ b/src/rsocket.c
@@ -161,6 +161,7 @@ struct rsocket {
        long              fd_flags;
        uint64_t          so_opts;
        uint64_t          tcp_opts;
+       uint64_t          ipv6_opts;
        enum rs_state     state;
        int               cq_armed;
        int               retries;
@@ -1817,6 +1818,18 @@ int rsetsockopt(int socket, int level, int optname,
                        break;
                }
                break;
+       case IPPROTO_IPV6:
+               opts = &rs->ipv6_opts;
+               switch (optname) {
+               case IPV6_V6ONLY:
+                       ret = rdma_set_option(rs->cm_id, RDMA_OPTION_ID,
+                                             RDMA_OPTION_ID_AFONLY,
+                                             (void *) optval, optlen);
+                       opt_on = *(int *) optval;
+                       break;
+               default:
+                       break;
+               }
        case SOL_RDMA:
                if (rs->state > rs_listening) {
                        ret = ERR(EINVAL);
@@ -1910,6 +1923,16 @@ int rgetsockopt(int socket, int level, int optname,
                        break;
                }
                break;
+       case IPPROTO_IPV6:
+               switch (optname) {
+               case IPV6_V6ONLY:
+                       *((int *) optval) = !!(rs->ipv6_opts & (1 << optname));
+                       *optlen = sizeof(int);
+                       break;
+               default:
+                       ret = ENOTSUP;
+                       break;
+               }
        case SOL_RDMA:
                switch (optname) {
                case RDMA_SQSIZE:


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