SUNRPC: Add support for formatted universal addresses

"Universal addresses" are a string representation of an IP address and
port.  They are described fully in RFC 3530, section 2.2.  Add support
for generating them in the RPC client's socket transport module.

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

diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h
index 4596c26..902a9c0 100644 (file)
--- a/include/linux/sunrpc/xprt.h
+++ b/include/linux/sunrpc/xprt.h
@@ -55,6 +55,7 @@ enum rpc_display_format_t {
        RPC_DISPLAY_ALL,
        RPC_DISPLAY_HEX_ADDR,
        RPC_DISPLAY_HEX_PORT,
+       RPC_DISPLAY_UNIVERSAL_ADDR,
        RPC_DISPLAY_MAX,
 };
 

diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 01121a4..7a154e4 100644 (file)
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -328,6 +328,15 @@ static void xs_format_ipv4_peer_addresses(struct rpc_xprt *xprt)
                                ntohs(addr->sin_port));
        }
        xprt->address_strings[RPC_DISPLAY_HEX_PORT] = buf;
+
+       buf = kzalloc(30, GFP_KERNEL);
+       if (buf) {
+               snprintf(buf, 30, NIPQUAD_FMT".%u.%u",
+                               NIPQUAD(addr->sin_addr.s_addr),
+                               ntohs(addr->sin_port) >> 8,
+                               ntohs(addr->sin_port) & 0xff);
+       }
+       xprt->address_strings[RPC_DISPLAY_UNIVERSAL_ADDR] = buf;
 }
 
 static void xs_format_ipv6_peer_addresses(struct rpc_xprt *xprt)
@@ -380,6 +389,15 @@ static void xs_format_ipv6_peer_addresses(struct rpc_xprt *xprt)
                                ntohs(addr->sin6_port));
        }
        xprt->address_strings[RPC_DISPLAY_HEX_PORT] = buf;
+
+       buf = kzalloc(50, GFP_KERNEL);
+       if (buf) {
+               snprintf(buf, 50, NIP6_FMT".%u.%u",
+                               NIP6(addr->sin6_addr),
+                               ntohs(addr->sin6_port) >> 8,
+                               ntohs(addr->sin6_port) & 0xff);
+       }
+       xprt->address_strings[RPC_DISPLAY_UNIVERSAL_ADDR] = buf;
 }
 
 static void xs_free_peer_addresses(struct rpc_xprt *xprt)