RPC/RDMA: optionally emit useful transport info upon connect/disconnect.

Signed-off-by: Tom Talpey <talpey@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

2 files changed, 22 insertions, 1 deletions

diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c
index c7d2380bb5e3..c2da680273c5 100644
--- a/net/sunrpc/xprtrdma/transport.c
+++ b/net/sunrpc/xprtrdma/transport.c
@@ -784,7 +784,7 @@ static void __exit xprt_rdma_cleanup(void)
 {
         int rc;
 
-        dprintk("RPCRDMA Module Removed, deregister RPC RDMA transport\n");
+        dprintk(KERN_INFO "RPCRDMA Module Removed, deregister RPC RDMA transport\n");
 #ifdef RPC_DEBUG
         if (sunrpc_table_header) {
                 unregister_sysctl_table(sunrpc_table_header);
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index f46fb93f421b..170e69cba6c4 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -344,6 +344,27 @@ connected:
                 break;
         }
 
+#ifdef RPC_DEBUG
+        if (connstate == 1) {
+                int ird = attr.max_dest_rd_atomic;
+                int tird = ep->rep_remote_cma.responder_resources;
+                printk(KERN_INFO "rpcrdma: connection to %u.%u.%u.%u:%u "
+                        "on %s, memreg %d slots %d ird %d%s\n",
+                        NIPQUAD(addr->sin_addr.s_addr),
+                        ntohs(addr->sin_port),
+                        ia->ri_id->device->name,
+                        ia->ri_memreg_strategy,
+                        xprt->rx_buf.rb_max_requests,
+                        ird, ird < 4 && ird < tird / 2 ? " (low!)" : "");
+        } else if (connstate < 0) {
+                printk(KERN_INFO "rpcrdma: connection to %u.%u.%u.%u:%u "
+                        "closed (%d)\n",
+                        NIPQUAD(addr->sin_addr.s_addr),
+                        ntohs(addr->sin_port),
+                        connstate);
+        }
+#endif
+
         return 0;
 }