SUNRPC: Add hex-formatted address support to rpc_peeraddr2str()

Add support for the NFS client's need to export volume information
with IP addresses formatted in hex instead of decimal.

This isn't used yet, but subsequent patches (not in this series) will
change the NFS client to use this functionality.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index b3f40b8dbcba..8a684d873111 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -296,6 +296,20 @@ static void xs_format_peer_addresses(struct rpc_xprt *xprt)
                         xprt->prot == IPPROTO_UDP ? "udp" : "tcp");
         }
         xprt->address_strings[RPC_DISPLAY_ALL] = buf;
+
+        buf = kzalloc(10, GFP_KERNEL);
+        if (buf) {
+                snprintf(buf, 10, "%02x%02x%02x%02x",
+                                NIPQUAD(addr->sin_addr.s_addr));
+        }
+        xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = buf;
+
+        buf = kzalloc(8, GFP_KERNEL);
+        if (buf) {
+                snprintf(buf, 8, "%4hx",
+                                ntohs(addr->sin_port));
+        }
+        xprt->address_strings[RPC_DISPLAY_HEX_PORT] = buf;
 }
 
 static void xs_free_peer_addresses(struct rpc_xprt *xprt)