IB/iser: Add support for RDMA_CM_EVENT_ADDR_CHANGE event

Enhance iser to act upon notification on network stack changes that
make its RDMA connection unaligned with the link used by the stack for
the <src,dst> IPs used to establish the connection.

When RDMA_CM_EVENT_ADDR_CHANGE arrives, just disconnect the
connection, assuming that the user space iscsid daemon will reconnect,
and the new connection will be aligned with the IP stack.

Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c
index 3a917c1f796fe7d3931f43dec8e15c4716042ccf..63462ecca147ccfa9e0b40e2070d49412592ba67 100644 (file)
--- a/drivers/infiniband/ulp/iser/iser_verbs.c
+++ b/drivers/infiniband/ulp/iser/iser_verbs.c
@@ -483,6 +483,7 @@ static int iser_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *eve
                break;
        case RDMA_CM_EVENT_DISCONNECTED:
        case RDMA_CM_EVENT_DEVICE_REMOVAL:
+       case RDMA_CM_EVENT_ADDR_CHANGE:
                iser_disconnected_handler(cma_id);
                break;
        default: