RDMA/cma: Pass QP type into rdma_create_id()

The RDMA CM currently infers the QP type from the port space selected
by the user.  In the future (eg with RDMA_PS_IB or XRC), there may not
be a 1-1 correspondence between port space and QP type.  For netlink
export of RDMA CM state, we want to export the QP type to userspace,
so it is cleaner to explicitly associate a QP type to an ID.

Modify rdma_create_id() to allow the user to specify the QP type, and
use it to make our selections of datagram versus connected mode.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index 451d39e..44be1c9 100644 (file)
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -265,11 +265,6 @@ static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
        hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
 }
 
-static inline int cma_is_ud_ps(enum rdma_port_space ps)
-{
-       return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB);
-}
-
 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
                              struct cma_device *cma_dev)
 {
@@ -415,7 +410,8 @@ static int cma_has_cm_dev(struct rdma_id_private *id_priv)
 }
 
 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
-                                 void *context, enum rdma_port_space ps)
+                                 void *context, enum rdma_port_space ps,
+                                 enum ib_qp_type qp_type)
 {
        struct rdma_id_private *id_priv;
 
@@ -427,6 +423,7 @@ struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
        id_priv->id.context = context;
        id_priv->id.event_handler = event_handler;
        id_priv->id.ps = ps;
+       id_priv->id.qp_type = qp_type;
        spin_lock_init(&id_priv->lock);
        mutex_init(&id_priv->qp_mutex);
        init_completion(&id_priv->comp);
@@ -494,7 +491,7 @@ int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
        if (IS_ERR(qp))
                return PTR_ERR(qp);
 
-       if (cma_is_ud_ps(id_priv->id.ps))
+       if (id->qp_type == IB_QPT_UD)
                ret = cma_init_ud_qp(id_priv, qp);
        else
                ret = cma_init_conn_qp(id_priv, qp);
@@ -622,7 +619,7 @@ static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
        qp_attr->port_num = id_priv->id.port_num;
        *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
 
-       if (cma_is_ud_ps(id_priv->id.ps)) {
+       if (id_priv->id.qp_type == IB_QPT_UD) {
                ret = cma_set_qkey(id_priv);
                if (ret)
                        return ret;
@@ -645,7 +642,7 @@ int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
        id_priv = container_of(id, struct rdma_id_private, id);
        switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
        case RDMA_TRANSPORT_IB:
-               if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps))
+               if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
                        ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
                else
                        ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
@@ -1088,7 +1085,7 @@ static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
                goto err;
 
        id = rdma_create_id(listen_id->event_handler, listen_id->context,
-                           listen_id->ps);
+                           listen_id->ps, ib_event->param.req_rcvd.qp_type);
        if (IS_ERR(id))
                goto err;
 
@@ -1139,7 +1136,7 @@ static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
        int ret;
 
        id = rdma_create_id(listen_id->event_handler, listen_id->context,
-                           listen_id->ps);
+                           listen_id->ps, IB_QPT_UD);
        if (IS_ERR(id))
                return NULL;
 
@@ -1194,7 +1191,7 @@ static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
        memset(&event, 0, sizeof event);
        offset = cma_user_data_offset(listen_id->id.ps);
        event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
-       if (cma_is_ud_ps(listen_id->id.ps)) {
+       if (listen_id->id.qp_type == IB_QPT_UD) {
                conn_id = cma_new_udp_id(&listen_id->id, ib_event);
                event.param.ud.private_data = ib_event->private_data + offset;
                event.param.ud.private_data_len =
@@ -1230,8 +1227,7 @@ static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
                 * while we're accessing the cm_id.
                 */
                mutex_lock(&lock);
-               if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
-                   !cma_is_ud_ps(conn_id->id.ps))
+               if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD))
                        ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
                mutex_unlock(&lock);
                mutex_unlock(&conn_id->handler_mutex);
@@ -1386,7 +1382,7 @@ static int iw_conn_req_handler(struct iw_cm_id *cm_id,
        /* Create a new RDMA id for the new IW CM ID */
        new_cm_id = rdma_create_id(listen_id->id.event_handler,
                                   listen_id->id.context,
-                                  RDMA_PS_TCP);
+                                  RDMA_PS_TCP, IB_QPT_RC);
        if (IS_ERR(new_cm_id)) {
                ret = -ENOMEM;
                goto out;
@@ -1535,7 +1531,8 @@ static void cma_listen_on_dev(struct rdma_id_private *id_priv,
        struct rdma_cm_id *id;
        int ret;
 
-       id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
+       id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
+                           id_priv->id.qp_type);
        if (IS_ERR(id))
                return;
 
@@ -2645,7 +2642,7 @@ int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
 
        switch (rdma_node_get_transport(id->device->node_type)) {
        case RDMA_TRANSPORT_IB:
-               if (cma_is_ud_ps(id->ps))
+               if (id->qp_type == IB_QPT_UD)
                        ret = cma_resolve_ib_udp(id_priv, conn_param);
                else
                        ret = cma_connect_ib(id_priv, conn_param);
@@ -2758,7 +2755,7 @@ int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
 
        switch (rdma_node_get_transport(id->device->node_type)) {
        case RDMA_TRANSPORT_IB:
-               if (cma_is_ud_ps(id->ps))
+               if (id->qp_type == IB_QPT_UD)
                        ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
                                                conn_param->private_data,
                                                conn_param->private_data_len);
@@ -2819,7 +2816,7 @@ int rdma_reject(struct rdma_cm_id *id, const void *private_data,
 
        switch (rdma_node_get_transport(id->device->node_type)) {
        case RDMA_TRANSPORT_IB:
-               if (cma_is_ud_ps(id->ps))
+               if (id->qp_type == IB_QPT_UD)
                        ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
                                                private_data, private_data_len);
                else

diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
index b3fa798..7109d5d 100644 (file)
--- a/drivers/infiniband/core/ucma.c
+++ b/drivers/infiniband/core/ucma.c
@@ -367,13 +367,28 @@ done:
        return ret;
 }
 
-static ssize_t ucma_create_id(struct ucma_file *file,
-                               const char __user *inbuf,
-                               int in_len, int out_len)
+static int ucma_get_qp_type(struct rdma_ucm_create_id *cmd, enum ib_qp_type *qp_type)
+{
+       switch (cmd->ps) {
+       case RDMA_PS_TCP:
+               *qp_type = IB_QPT_RC;
+               return 0;
+       case RDMA_PS_UDP:
+       case RDMA_PS_IPOIB:
+               *qp_type = IB_QPT_UD;
+               return 0;
+       default:
+               return -EINVAL;
+       }
+}
+
+static ssize_t ucma_create_id(struct ucma_file *file, const char __user *inbuf,
+                             int in_len, int out_len)
 {
        struct rdma_ucm_create_id cmd;
        struct rdma_ucm_create_id_resp resp;
        struct ucma_context *ctx;
+       enum ib_qp_type qp_type;
        int ret;
 
        if (out_len < sizeof(resp))
@@ -382,6 +397,10 @@ static ssize_t ucma_create_id(struct ucma_file *file,
        if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
                return -EFAULT;
 
+       ret = ucma_get_qp_type(&cmd, &qp_type);
+       if (ret)
+               return ret;
+
        mutex_lock(&file->mut);
        ctx = ucma_alloc_ctx(file);
        mutex_unlock(&file->mut);
@@ -389,7 +408,7 @@ static ssize_t ucma_create_id(struct ucma_file *file,
                return -ENOMEM;
 
        ctx->uid = cmd.uid;
-       ctx->cm_id = rdma_create_id(ucma_event_handler, ctx, cmd.ps);
+       ctx->cm_id = rdma_create_id(ucma_event_handler, ctx, cmd.ps, qp_type);
        if (IS_ERR(ctx->cm_id)) {
                ret = PTR_ERR(ctx->cm_id);
                goto err1;

diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c
index 9876865..ede1475 100644 (file)
--- a/drivers/infiniband/ulp/iser/iser_verbs.c
+++ b/drivers/infiniband/ulp/iser/iser_verbs.c
@@ -548,7 +548,7 @@ int iser_connect(struct iser_conn   *ib_conn,
        iser_conn_get(ib_conn); /* ref ib conn's cma id */
        ib_conn->cma_id = rdma_create_id(iser_cma_handler,
                                             (void *)ib_conn,
-                                            RDMA_PS_TCP);
+                                            RDMA_PS_TCP, IB_QPT_RC);
        if (IS_ERR(ib_conn->cma_id)) {
                err = PTR_ERR(ib_conn->cma_id);
                iser_err("rdma_create_id failed: %d\n", err);

diff --git a/include/rdma/rdma_cm.h b/include/rdma/rdma_cm.h
index d5b2265..26977c1 100644 (file)
--- a/include/rdma/rdma_cm.h
+++ b/include/rdma/rdma_cm.h
@@ -144,6 +144,7 @@ struct rdma_cm_id {
        rdma_cm_event_handler    event_handler;
        struct rdma_route        route;
        enum rdma_port_space     ps;
+       enum ib_qp_type          qp_type;
        u8                       port_num;
 };
 
@@ -154,9 +155,11 @@ struct rdma_cm_id {
  *   returned rdma_id.
  * @context: User specified context associated with the id.
  * @ps: RDMA port space.
+ * @qp_type: type of queue pair associated with the id.
  */
 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
-                                 void *context, enum rdma_port_space ps);
+                                 void *context, enum rdma_port_space ps,
+                                 enum ib_qp_type qp_type);
 
 /**
   * rdma_destroy_id - Destroys an RDMA identifier.

diff --git a/net/9p/trans_rdma.c b/net/9p/trans_rdma.c
index 150e0c4..3640e83 100644 (file)
--- a/net/9p/trans_rdma.c
+++ b/net/9p/trans_rdma.c
@@ -591,7 +591,8 @@ rdma_create_trans(struct p9_client *client, const char *addr, char *args)
                return -ENOMEM;
 
        /* Create the RDMA CM ID */
-       rdma->cm_id = rdma_create_id(p9_cm_event_handler, client, RDMA_PS_TCP);
+       rdma->cm_id = rdma_create_id(p9_cm_event_handler, client, RDMA_PS_TCP,
+                                    IB_QPT_RC);
        if (IS_ERR(rdma->cm_id))
                goto error;
 

diff --git a/net/rds/ib.c b/net/rds/ib.c
index cce19f9..3b83086 100644 (file)
--- a/net/rds/ib.c
+++ b/net/rds/ib.c
@@ -325,7 +325,7 @@ static int rds_ib_laddr_check(__be32 addr)
        /* Create a CMA ID and try to bind it. This catches both
         * IB and iWARP capable NICs.
         */
-       cm_id = rdma_create_id(NULL, NULL, RDMA_PS_TCP);
+       cm_id = rdma_create_id(NULL, NULL, RDMA_PS_TCP, IB_QPT_RC);
        if (IS_ERR(cm_id))
                return PTR_ERR(cm_id);
 

diff --git a/net/rds/ib_cm.c b/net/rds/ib_cm.c
index ee369d2..fd453dd 100644 (file)
--- a/net/rds/ib_cm.c
+++ b/net/rds/ib_cm.c
@@ -587,7 +587,7 @@ int rds_ib_conn_connect(struct rds_connection *conn)
        /* XXX I wonder what affect the port space has */
        /* delegate cm event handler to rdma_transport */
        ic->i_cm_id = rdma_create_id(rds_rdma_cm_event_handler, conn,
-                                    RDMA_PS_TCP);
+                                    RDMA_PS_TCP, IB_QPT_RC);
        if (IS_ERR(ic->i_cm_id)) {
                ret = PTR_ERR(ic->i_cm_id);
                ic->i_cm_id = NULL;

diff --git a/net/rds/iw.c b/net/rds/iw.c
index 5a9676f..f747484 100644 (file)
--- a/net/rds/iw.c
+++ b/net/rds/iw.c
@@ -226,7 +226,7 @@ static int rds_iw_laddr_check(__be32 addr)
        /* Create a CMA ID and try to bind it. This catches both
         * IB and iWARP capable NICs.
         */
-       cm_id = rdma_create_id(NULL, NULL, RDMA_PS_TCP);
+       cm_id = rdma_create_id(NULL, NULL, RDMA_PS_TCP, IB_QPT_RC);
        if (IS_ERR(cm_id))
                return PTR_ERR(cm_id);
 

diff --git a/net/rds/iw_cm.c b/net/rds/iw_cm.c
index 3a60a15..c12db66 100644 (file)
--- a/net/rds/iw_cm.c
+++ b/net/rds/iw_cm.c
@@ -522,7 +522,7 @@ int rds_iw_conn_connect(struct rds_connection *conn)
        /* XXX I wonder what affect the port space has */
        /* delegate cm event handler to rdma_transport */
        ic->i_cm_id = rdma_create_id(rds_rdma_cm_event_handler, conn,
-                                    RDMA_PS_TCP);
+                                    RDMA_PS_TCP, IB_QPT_RC);
        if (IS_ERR(ic->i_cm_id)) {
                ret = PTR_ERR(ic->i_cm_id);
                ic->i_cm_id = NULL;

diff --git a/net/rds/rdma_transport.c b/net/rds/rdma_transport.c
index 4195a05..f8760e1 100644 (file)
--- a/net/rds/rdma_transport.c
+++ b/net/rds/rdma_transport.c
@@ -158,7 +158,8 @@ static int rds_rdma_listen_init(void)
        struct rdma_cm_id *cm_id;
        int ret;
 
-       cm_id = rdma_create_id(rds_rdma_cm_event_handler, NULL, RDMA_PS_TCP);
+       cm_id = rdma_create_id(rds_rdma_cm_event_handler, NULL, RDMA_PS_TCP,
+                              IB_QPT_RC);
        if (IS_ERR(cm_id)) {
                ret = PTR_ERR(cm_id);
                printk(KERN_ERR "RDS/RDMA: failed to setup listener, "

diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index 1a10dcd..afff475 100644 (file)
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -695,7 +695,8 @@ static struct svc_xprt *svc_rdma_create(struct svc_serv *serv,
                return ERR_PTR(-ENOMEM);
        xprt = &cma_xprt->sc_xprt;
 
-       listen_id = rdma_create_id(rdma_listen_handler, cma_xprt, RDMA_PS_TCP);
+       listen_id = rdma_create_id(rdma_listen_handler, cma_xprt, RDMA_PS_TCP,
+                                  IB_QPT_RC);
        if (IS_ERR(listen_id)) {
                ret = PTR_ERR(listen_id);
                dprintk("svcrdma: rdma_create_id failed = %d\n", ret);

diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index d4297dc..80f8da3 100644 (file)
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -387,7 +387,7 @@ rpcrdma_create_id(struct rpcrdma_xprt *xprt,
 
        init_completion(&ia->ri_done);
 
-       id = rdma_create_id(rpcrdma_conn_upcall, xprt, RDMA_PS_TCP);
+       id = rdma_create_id(rpcrdma_conn_upcall, xprt, RDMA_PS_TCP, IB_QPT_RC);
        if (IS_ERR(id)) {
                rc = PTR_ERR(id);
                dprintk("RPC:       %s: rdma_create_id() failed %i\n",