[net-next][PATCH 10/18] RDS: IB: track and log active side endpoint in connection

[Santosh Shilimkar]

Useful to know the active and passive end points in a
RDS IB connection.

Signed-off-by: Santosh Shilimkar <santosh.shilim...@oracle.com>
---
 net/rds/ib.h    |  3 +++
 net/rds/ib_cm.c | 11 +++++++----
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/net/rds/ib.h b/net/rds/ib.h
index f14c26d..97e7696 100644
--- a/net/rds/ib.h
+++ b/net/rds/ib.h
@@ -181,6 +181,9 @@ struct rds_ib_connection {
 
        /* Batched completions */
        unsigned int            i_unsignaled_wrs;
+
+       /* Endpoint role in connection */
+       int                     i_active_side;
 };
 
 /* This assumes that atomic_t is at least 32 bits */
diff --git a/net/rds/ib_cm.c b/net/rds/ib_cm.c
index 3002acf..4d1bf04 100644
--- a/net/rds/ib_cm.c
+++ b/net/rds/ib_cm.c
@@ -120,16 +120,17 @@ void rds_ib_cm_connect_complete(struct rds_connection 
*conn, struct rdma_cm_even
                rds_conn_destroy(conn);
                return;
        } else {
-               pr_notice("RDS/IB: connected <%pI4,%pI4> version %u.%u%s\n",
+               pr_notice("RDS/IB: %s conn connected <%pI4,%pI4> version 
%u.%u%s\n",
+                         ic->i_active_side ? "Active" : "Passive",
                          &conn->c_laddr, &conn->c_faddr,
                          RDS_PROTOCOL_MAJOR(conn->c_version),
                          RDS_PROTOCOL_MINOR(conn->c_version),
                          ic->i_flowctl ? ", flow control" : "");
        }
 
-       /*
-        * Init rings and fill recv. this needs to wait until protocol 
negotiation
-        * is complete, since ring layout is different from 3.0 to 3.1.
+       /* Init rings and fill recv. this needs to wait until protocol
+        * negotiation is complete, since ring layout is different
+        * from 3.1 to 4.1.
         */
        rds_ib_send_init_ring(ic);
        rds_ib_recv_init_ring(ic);
@@ -685,6 +686,7 @@ int rds_ib_cm_initiate_connect(struct rdma_cm_id *cm_id)
                if (ic->i_cm_id == cm_id)
                        ret = 0;
        }
+       ic->i_active_side = true;
        return ret;
 }
 
@@ -859,6 +861,7 @@ void rds_ib_conn_path_shutdown(struct rds_conn_path *cp)
        ic->i_sends = NULL;
        vfree(ic->i_recvs);
        ic->i_recvs = NULL;
+       ic->i_active_side = false;
 }
 
 int rds_ib_conn_alloc(struct rds_connection *conn, gfp_t gfp)
-- 
1.9.1