Create as many ibv_path_data structs from the RDMA route
ibv_sa_path_rec struct for the rsocket based on how
many fit into the supplied buffer.
Signed-off-by: Hal Rosenstock <h...@mellanox.com>
---
Changes since v1:
Change if to while so loop as originally intended
Handle case where rgetsockopt called immediately after rsetsockopt
diff --git a/src/rsocket.c b/src/rsocket.c
index 0e5635f..2ec38b6 100644
--- a/src/rsocket.c
+++ b/src/rsocket.c
@@ -3500,11 +3500,38 @@ int rsetsockopt(int socket, int level, int optname,
return ret;
}
+static void rs_convert_sa_path(struct ibv_sa_path_rec *sa_path,
+ struct ibv_path_data *path_data)
+{
+ uint32_t fl_hop;
+
+ memset(path_data, 0, sizeof(*path_data));
+ path_data->path.dgid = sa_path->dgid;
+ path_data->path.sgid = sa_path->sgid;
+ path_data->path.dlid = sa_path->dlid;
+ path_data->path.slid = sa_path->slid;
+ fl_hop = ntohl(sa_path->flow_label) << 8;
+ path_data->path.flowlabel_hoplimit = htonl(fl_hop) | sa_path->hop_limit;
+ path_data->path.tclass = sa_path->traffic_class;
+ path_data->path.reversible_numpath = sa_path->reversible << 7 | 1;
+ path_data->path.pkey = sa_path->pkey;
+ path_data->path.qosclass_sl = sa_path->sl;
+ path_data->path.mtu = sa_path->mtu | 2 << 6; /* exactly */
+ path_data->path.rate = sa_path->rate | 2 << 6;
+ path_data->path.packetlifetime = sa_path->packet_life_time | 2 << 6;
+ path_data->flags= sa_path->preference;
+}
+
int rgetsockopt(int socket, int level, int optname,
void *optval, socklen_t *optlen)
{
struct rsocket *rs;
+ void *opt;
+ struct ibv_sa_path_rec *path_rec;
+ struct ibv_path_data path_data;
+ socklen_t len;
int ret = 0;
+ int num_paths;
rs = idm_lookup(&idm, socket);
if (!rs)
@@ -3597,6 +3624,36 @@ int rgetsockopt(int socket, int level, int optname,
*((int *) optval) = rs->target_iomap_size;
*optlen = sizeof(int);
break;
+ case RDMA_ROUTE:
+ if (rs->optval) {
+ if (*optlen < rs->optlen) {
+ ret = EINVAL;
+ } else {
+ memcpy(rs->optval, optval, rs->optlen);
+ *optlen = rs->optlen;
+ }
+ } else {
+ if (*optlen < sizeof(path_data)) {
+ ret = EINVAL;
+ } else {
+ len = 0;
+ opt = optval;
+ path_rec = rs->cm_id->route.path_rec;
+ num_paths = 0;
+ while (len + sizeof(path_data) <=
*optlen &&
+ num_paths <
rs->cm_id->route.num_paths) {
+ rs_convert_sa_path(path_rec,
&path_data);
+ memcpy(opt, &path_data,
sizeof(path_data));
+ len += sizeof(path_data);
+ opt += sizeof(path_data);
+ path_rec++;
+ num_paths++;
+ }
+ *optlen = len;
+ ret = 0;
+ }
+ }
+ break;
default:
ret = ENOTSUP;
break;
--
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