From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Tue, 18 Sep 2012 09:37:18 +0000 (+0400)
Subject: Revert: lockd: use rpc client's cl_nodename for id encoding
X-Git-Tag: firefly_0821_release~7541^2~439
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=0fc01fa3b5f98b7add96834efc56a09b398429b3;p=firefly-linux-kernel-4.4.55.git

Revert: lockd: use rpc client's cl_nodename for id encoding

This reverts 12d63702c53bc2230dfc997e91ca891f39cb6446 which was commit
303a7ce92064c285a04c870f2dc0192fdb2968cb upstream.

Taking hostname from uts namespace if not safe, because this cuold be
performind during umount operation on child reaper death. And in this case
current->nsproxy is NULL already.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Stanislav Kinsbursky <skinsbursky@parallels.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
---

diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
index df753a1cb4b6..23d7451b2938 100644
--- a/fs/lockd/mon.c
+++ b/fs/lockd/mon.c
@@ -40,7 +40,6 @@ struct nsm_args {
 	u32			proc;
 
 	char			*mon_name;
-	char			*nodename;
 };
 
 struct nsm_res {
@@ -94,7 +93,6 @@ static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res)
 		.vers		= 3,
 		.proc		= NLMPROC_NSM_NOTIFY,
 		.mon_name	= nsm->sm_mon_name,
-		.nodename	= utsname()->nodename,
 	};
 	struct rpc_message msg = {
 		.rpc_argp	= &args,
@@ -431,7 +429,7 @@ static void encode_my_id(struct xdr_stream *xdr, const struct nsm_args *argp)
 {
 	__be32 *p;
 
-	encode_nsm_string(xdr, argp->nodename);
+	encode_nsm_string(xdr, utsname()->nodename);
 	p = xdr_reserve_space(xdr, 4 + 4 + 4);
 	*p++ = cpu_to_be32(argp->prog);
 	*p++ = cpu_to_be32(argp->vers);