From: Chuck Lever Subject: [PATCH 01/27] SUNRPC: rpc_create() default hostname should support AF_INET6 addresses Date: Mon, 10 Dec 2007 14:56:24 -0500 Message-ID: <20071210195623.2823.13011.stgit@manray.1015granger.net> References: <20071210195106.2823.43884.stgit@manray.1015granger.net> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Cc: aurelien.charbon-Z51IpKcfGtLk1uMJSBkQmQ@public.gmane.org, linux-nfs@vger.kernel.org To: trond.myklebust@fys.uio.no Return-path: Received: from flpi102.sbcis.sbc.com ([207.115.20.71]:1546 "EHLO flpi102.prodigy.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751602AbXLJUQM (ORCPT ); Mon, 10 Dec 2007 15:16:12 -0500 In-Reply-To: <20071210195106.2823.43884.stgit-meopP2rzCrTwdl/1UfZZQIVfYA8g3rJ/@public.gmane.org> Sender: linux-nfs-owner@vger.kernel.org List-ID: If the ULP doesn't pass a hostname string to rpc_create(), it manufactures one based on the passed-in address. Be smart enough to handle an AF_INET6 address properly in this case. Move the default servername logic before the xprt_create_transport() call to simplify error handling in rpc_create(). Signed-off-by: Chuck Lever --- net/sunrpc/clnt.c | 32 +++++++++++++++++++++++++++----- 1 files changed, 27 insertions(+), 5 deletions(-) diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index 76be83e..c297161 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -30,6 +30,7 @@ #include #include #include +#include #include #include @@ -247,7 +248,7 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args) .addrlen = args->addrsize, .timeout = args->timeout }; - char servername[20]; + char servername[48]; xprt = xprt_create_transport(&xprtargs); if (IS_ERR(xprt)) @@ -258,13 +259,34 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args) * up a string representation of the passed-in address. */ if (args->servername == NULL) { - struct sockaddr_in *addr = - (struct sockaddr_in *) args->address; - snprintf(servername, sizeof(servername), NIPQUAD_FMT, - NIPQUAD(addr->sin_addr.s_addr)); + servername[0] = '\0'; + switch (args->address->sa_family) { + case AF_INET: { + struct sockaddr_in *sin = + (struct sockaddr_in *)args->address; + snprintf(servername, sizeof(servername), NIPQUAD_FMT, + NIPQUAD(sin->sin_addr.s_addr)); + break; + } + case AF_INET6: { + struct sockaddr_in6 *sin = + (struct sockaddr_in6 *)args->address; + snprintf(servername, sizeof(servername), NIP6_FMT, + NIP6(sin->sin6_addr)); + break; + } + default: + /* caller wants default server name, but + * address family isn't recognized. */ + return ERR_PTR(-EINVAL); + } args->servername = servername; } + xprt = xprt_create_transport(&xprtargs); + if (IS_ERR(xprt)) + return (struct rpc_clnt *)xprt; + /* * By default, kernel RPC client connects from a reserved port. * CAP_NET_BIND_SERVICE will not be set for unprivileged requesters,