RDMA/cma: Set qkey for AF_IB
Allow the user to specify the qkey when using AF_IB. The qkey is added to struct rdma_ucm_conn_param in place of a reserved field, but for backwards compatability, is only accessed if the associated rdma_cm_id is using AF_IB. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
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@ -293,16 +293,25 @@ static inline unsigned short cma_family(struct rdma_id_private *id_priv)
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return id_priv->id.route.addr.src_addr.ss_family;
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}
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static int cma_set_qkey(struct rdma_id_private *id_priv)
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static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
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{
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struct ib_sa_mcmember_rec rec;
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int ret = 0;
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if (id_priv->qkey)
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if (id_priv->qkey) {
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if (qkey && id_priv->qkey != qkey)
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return -EINVAL;
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return 0;
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}
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if (qkey) {
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id_priv->qkey = qkey;
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return 0;
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}
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switch (id_priv->id.ps) {
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case RDMA_PS_UDP:
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case RDMA_PS_IB:
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id_priv->qkey = RDMA_UDP_QKEY;
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break;
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case RDMA_PS_IPOIB:
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@ -689,7 +698,7 @@ static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
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*qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
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if (id_priv->id.qp_type == IB_QPT_UD) {
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ret = cma_set_qkey(id_priv);
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ret = cma_set_qkey(id_priv, 0);
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if (ret)
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return ret;
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@ -2624,15 +2633,10 @@ static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
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event.status = ib_event->param.sidr_rep_rcvd.status;
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break;
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}
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ret = cma_set_qkey(id_priv);
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ret = cma_set_qkey(id_priv, rep->qkey);
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if (ret) {
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event.event = RDMA_CM_EVENT_ADDR_ERROR;
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event.status = -EINVAL;
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break;
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}
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if (id_priv->qkey != rep->qkey) {
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event.event = RDMA_CM_EVENT_UNREACHABLE;
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event.status = -EINVAL;
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event.status = ret;
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break;
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}
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ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
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@ -2922,7 +2926,7 @@ static int cma_accept_iw(struct rdma_id_private *id_priv,
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}
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static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
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enum ib_cm_sidr_status status,
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enum ib_cm_sidr_status status, u32 qkey,
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const void *private_data, int private_data_len)
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{
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struct ib_cm_sidr_rep_param rep;
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@ -2931,7 +2935,7 @@ static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
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memset(&rep, 0, sizeof rep);
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rep.status = status;
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if (status == IB_SIDR_SUCCESS) {
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ret = cma_set_qkey(id_priv);
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ret = cma_set_qkey(id_priv, qkey);
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if (ret)
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return ret;
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rep.qp_num = id_priv->qp_num;
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@ -2965,11 +2969,12 @@ int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
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if (id->qp_type == IB_QPT_UD) {
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if (conn_param)
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ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
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conn_param->qkey,
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conn_param->private_data,
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conn_param->private_data_len);
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else
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ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
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NULL, 0);
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0, NULL, 0);
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} else {
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if (conn_param)
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ret = cma_accept_ib(id_priv, conn_param);
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@ -3030,7 +3035,7 @@ int rdma_reject(struct rdma_cm_id *id, const void *private_data,
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switch (rdma_node_get_transport(id->device->node_type)) {
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case RDMA_TRANSPORT_IB:
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if (id->qp_type == IB_QPT_UD)
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ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
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ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
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private_data, private_data_len);
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else
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ret = ib_send_cm_rej(id_priv->cm_id.ib,
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@ -3091,6 +3096,8 @@ static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
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cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
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return 0;
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if (!status)
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status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
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mutex_lock(&id_priv->qp_mutex);
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if (!status && id_priv->id.qp)
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status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
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@ -709,7 +709,8 @@ out:
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return ret;
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}
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static void ucma_copy_conn_param(struct rdma_conn_param *dst,
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static void ucma_copy_conn_param(struct rdma_cm_id *id,
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struct rdma_conn_param *dst,
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struct rdma_ucm_conn_param *src)
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{
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dst->private_data = src->private_data;
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@ -721,6 +722,7 @@ static void ucma_copy_conn_param(struct rdma_conn_param *dst,
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dst->rnr_retry_count = src->rnr_retry_count;
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dst->srq = src->srq;
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dst->qp_num = src->qp_num;
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dst->qkey = (id->route.addr.src_addr.ss_family == AF_IB) ? src->qkey : 0;
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}
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static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf,
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@ -741,7 +743,7 @@ static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf,
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if (IS_ERR(ctx))
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return PTR_ERR(ctx);
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ucma_copy_conn_param(&conn_param, &cmd.conn_param);
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ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param);
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ret = rdma_connect(ctx->cm_id, &conn_param);
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ucma_put_ctx(ctx);
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return ret;
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@ -784,7 +786,7 @@ static ssize_t ucma_accept(struct ucma_file *file, const char __user *inbuf,
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return PTR_ERR(ctx);
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if (cmd.conn_param.valid) {
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ucma_copy_conn_param(&conn_param, &cmd.conn_param);
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ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param);
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mutex_lock(&file->mut);
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ret = rdma_accept(ctx->cm_id, &conn_param);
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if (!ret)
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@ -98,6 +98,7 @@ struct rdma_conn_param {
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/* Fields below ignored if a QP is created on the rdma_cm_id. */
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u8 srq;
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u32 qp_num;
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u32 qkey;
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};
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struct rdma_ud_param {
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@ -131,7 +131,7 @@ struct rdma_ucm_query_route_resp {
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struct rdma_ucm_conn_param {
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__u32 qp_num;
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__u32 reserved;
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__u32 qkey;
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__u8 private_data[RDMA_MAX_PRIVATE_DATA];
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__u8 private_data_len;
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__u8 srq;
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