RDMA_ALIGN_WITH_NETDEVICE high availability (ha) mode means that the consumer of
the rdma-cm wants that RDMA sessions would always use the same links (eg
<hca/port>)
as the IP stack does.
In the current code, this does not happen when bonding did fail-over but
the link used by an already existing session is operating fine. Consumers
seeking this ha mode would get the new RDMA_CM_EVENT_NETDEV_CHANGE event
when such misalignment happens.
More ha modes can be added in the future.
Signed-off-by: Or Gerlitz <[EMAIL PROTECTED]>
changes from v1 -
- added new event RDMA_CM_EVENT_NETDEV_CHANGE
- took the approach of notifying the user vs disconnecting the ID
Index: linux-2.6.26-rc2/include/rdma/rdma_cm.h
===================================================================
--- linux-2.6.26-rc2.orig/include/rdma/rdma_cm.h 2008-05-15
14:48:44.000000000 +0300
+++ linux-2.6.26-rc2/include/rdma/rdma_cm.h 2008-05-15 14:49:48.000000000
+0300
@@ -53,7 +53,8 @@ enum rdma_cm_event_type {
RDMA_CM_EVENT_DISCONNECTED,
RDMA_CM_EVENT_DEVICE_REMOVAL,
RDMA_CM_EVENT_MULTICAST_JOIN,
- RDMA_CM_EVENT_MULTICAST_ERROR
+ RDMA_CM_EVENT_MULTICAST_ERROR,
+ RDMA_CM_EVENT_NETDEV_CHANGE
};
enum rdma_port_space {
@@ -328,4 +329,10 @@ void rdma_leave_multicast(struct rdma_cm
*/
void rdma_set_service_type(struct rdma_cm_id *id, int tos);
+enum rdma_ha_mode {
+ RDMA_ALIGN_WITH_NETDEVICE = 1
+};
+
+int rdma_set_high_availability_mode(struct rdma_cm_id *id, enum rdma_ha_mode
mode);
+
#endif /* RDMA_CM_H */
Index: linux-2.6.26-rc2/drivers/infiniband/core/cma.c
===================================================================
--- linux-2.6.26-rc2.orig/drivers/infiniband/core/cma.c 2008-05-15
14:48:44.000000000 +0300
+++ linux-2.6.26-rc2/drivers/infiniband/core/cma.c 2008-05-15
16:30:42.000000000 +0300
@@ -143,6 +143,7 @@ struct rdma_id_private {
u32 qp_num;
u8 srq;
u8 tos;
+ enum rdma_ha_mode ha_mode;
};
struct cma_multicast {
@@ -1523,6 +1524,19 @@ void rdma_set_service_type(struct rdma_c
}
EXPORT_SYMBOL(rdma_set_service_type);
+int rdma_set_high_availability_mode(struct rdma_cm_id *id, enum rdma_ha_mode
mode)
+{
+ struct rdma_id_private *id_priv;
+
+ if (mode != RDMA_ALIGN_WITH_NETDEVICE)
+ return -EINVAL;
+
+ id_priv = container_of(id, struct rdma_id_private, id);
+ id_priv->ha_mode = mode;
+ return 0;
+}
+EXPORT_SYMBOL(rdma_set_high_availability_mode);
+
static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
void *context)
{
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