[ 087/147] lockd: use rpc clients cl_nodename for id encoding

Ben Hutchings
2012-10-14T15:02:39Z

From: Stanislav Kinsbursky <skinsbursky@parallels.com>

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: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
fs/lockd/mon.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
index 38f240e..e0bc36e 100644
--- a/fs/lockd/mon.c
+++ b/fs/lockd/mon.c
@@ -42,6 +42,7 @@ struct nsm_args {
u32 proc;

char *mon_name;
+ char *nodename;
};

struct nsm_res {
@@ -141,6 +142,7 @@ 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,
@@ -477,7 +479,7 @@ static void encode_my_id(struct xdr_stream *xdr, const struct nsm_args *argp)
{
__be32 *p;

- encode_nsm_string(xdr, utsname()->nodename);
+ encode_nsm_string(xdr, argp->nodename);
p = xdr_reserve_space(xdr, 4 + 4 + 4);
*p++ = cpu_to_be32(argp->prog);
*p++ = cpu_to_be32(argp->vers);