SUNRPC: add a function to format IPv6 addresses

Clone xs_format_ipv4_peer_addresses into an IPv6 version.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 52 insertions, 0 deletions

diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 45fac56b40f9..23e5865d984c 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -312,6 +312,58 @@ static void xs_format_ipv4_peer_addresses(struct rpc_xprt *xprt)
         xprt->address_strings[RPC_DISPLAY_HEX_PORT] = buf;
 }
 
+static void xs_format_ipv6_peer_addresses(struct rpc_xprt *xprt)
+{
+        struct sockaddr_in6 *addr = (struct sockaddr_in6 *) &xprt->addr;
+        char *buf;
+
+        buf = kzalloc(40, GFP_KERNEL);
+        if (buf) {
+                snprintf(buf, 40, NIP6_FMT,
+                                NIP6(addr->sin6_addr));
+        }
+        xprt->address_strings[RPC_DISPLAY_ADDR] = buf;
+
+        buf = kzalloc(8, GFP_KERNEL);
+        if (buf) {
+                snprintf(buf, 8, "%u",
+                                ntohs(addr->sin6_port));
+        }
+        xprt->address_strings[RPC_DISPLAY_PORT] = buf;
+
+        buf = kzalloc(8, GFP_KERNEL);
+        if (buf) {
+                if (xprt->prot == IPPROTO_UDP)
+                        snprintf(buf, 8, "udp");
+                else
+                        snprintf(buf, 8, "tcp");
+        }
+        xprt->address_strings[RPC_DISPLAY_PROTO] = buf;
+
+        buf = kzalloc(64, GFP_KERNEL);
+        if (buf) {
+                snprintf(buf, 64, "addr="NIP6_FMT" port=%u proto=%s",
+                                NIP6(addr->sin6_addr),
+                                ntohs(addr->sin6_port),
+                                xprt->prot == IPPROTO_UDP ? "udp" : "tcp");
+        }
+        xprt->address_strings[RPC_DISPLAY_ALL] = buf;
+
+        buf = kzalloc(36, GFP_KERNEL);
+        if (buf) {
+                snprintf(buf, 36, NIP6_SEQFMT,
+                                NIP6(addr->sin6_addr));
+        }
+        xprt->address_strings[RPC_DISPLAY_HEX_ADDR] = buf;
+
+        buf = kzalloc(8, GFP_KERNEL);
+        if (buf) {
+                snprintf(buf, 8, "%4hx",
+                                ntohs(addr->sin6_port));
+        }
+        xprt->address_strings[RPC_DISPLAY_HEX_PORT] = buf;
+}
+
 static void xs_free_peer_addresses(struct rpc_xprt *xprt)
 {
         int i;