IB/cm: Match connection requests based on private data

Extend matching connection requests to listens in the InfiniBand CM to
include private data checks.

This allows applications to listen on the same service identifier,
with private data directing the request to the appropriate application.

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

1 files changed, 17 insertions, 6 deletions

diff --git a/include/rdma/ib_cm.h b/include/rdma/ib_cm.h
index 0a9fcd59eb4..8f394f03568 100644
--- a/include/rdma/ib_cm.h
+++ b/include/rdma/ib_cm.h
@@ -32,7 +32,7 @@
  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  *
- * $Id: ib_cm.h 2730 2005-06-28 16:43:03Z sean.hefty $
+ * $Id: ib_cm.h 4311 2005-12-05 18:42:01Z sean.hefty $
  */
 #if !defined(IB_CM_H)
 #define IB_CM_H
@@ -102,7 +102,8 @@ enum ib_cm_data_size {
         IB_CM_APR_INFO_LENGTH            = 72,
         IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE = 216,
         IB_CM_SIDR_REP_PRIVATE_DATA_SIZE = 136,
-        IB_CM_SIDR_REP_INFO_LENGTH       = 72
+        IB_CM_SIDR_REP_INFO_LENGTH       = 72,
+        IB_CM_COMPARE_SIZE               = 64
 };
 
 struct ib_cm_id;
@@ -238,7 +239,6 @@ struct ib_cm_sidr_rep_event_param {
         u32                     qpn;
         void                    *info;
         u8                      info_len;
-
 };
 
 struct ib_cm_event {
@@ -317,6 +317,15 @@ void ib_destroy_cm_id(struct ib_cm_id *cm_id);
 
 #define IB_SERVICE_ID_AGN_MASK  __constant_cpu_to_be64(0xFF00000000000000ULL)
 #define IB_CM_ASSIGN_SERVICE_ID __constant_cpu_to_be64(0x0200000000000000ULL)
+#define IB_CMA_SERVICE_ID       __constant_cpu_to_be64(0x0000000001000000ULL)
+#define IB_CMA_SERVICE_ID_MASK  __constant_cpu_to_be64(0xFFFFFFFFFF000000ULL)
+#define IB_SDP_SERVICE_ID       __constant_cpu_to_be64(0x0000000000010000ULL)
+#define IB_SDP_SERVICE_ID_MASK  __constant_cpu_to_be64(0xFFFFFFFFFFFF0000ULL)
+
+struct ib_cm_compare_data {
+        u8  data[IB_CM_COMPARE_SIZE];
+        u8  mask[IB_CM_COMPARE_SIZE];
+};
 
 /**
  * ib_cm_listen - Initiates listening on the specified service ID for
@@ -330,10 +339,12 @@ void ib_destroy_cm_id(struct ib_cm_id *cm_id);
  *   range of service IDs.  If set to 0, the service ID is matched
  *   exactly.  This parameter is ignored if %service_id is set to
  *   IB_CM_ASSIGN_SERVICE_ID.
+ * @compare_data: This parameter is optional.  It specifies data that must
+ *   appear in the private data of a connection request for the specified
+ *   listen request.
  */
-int ib_cm_listen(struct ib_cm_id *cm_id,
-                 __be64 service_id,
-                 __be64 service_mask);
+int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id, __be64 service_mask,
+                 struct ib_cm_compare_data *compare_data);
 
 struct ib_cm_req_param {
         struct ib_sa_path_rec   *primary_path;