NLM: Shrink the maximum request size of NLM4 requests

[deliverable/linux.git] / fs / lockd / xdr.c

diff --git a/fs/lockd/xdr.c b/fs/lockd/xdr.c
index 34dae5d70738bff79bc78945fd647dc4f16bdbca..6aac4b2c9ff0a896813bcf76ddf274cefe38de14 100644 (file)
--- a/fs/lockd/xdr.c
+++ b/fs/lockd/xdr.c
@@ -510,17 +510,20 @@ nlmclt_decode_res(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp)
        return 0;
 }
 
+#if (NLMCLNT_OHSIZE > XDR_MAX_NETOBJ)
+#  error "NLM host name cannot be larger than XDR_MAX_NETOBJ!"
+#endif
+
 /*
  * Buffer requirements for NLM
  */
 #define NLM_void_sz            0
 #define NLM_cookie_sz          1+XDR_QUADLEN(NLM_MAXCOOKIELEN)
-#define NLM_caller_sz          1+XDR_QUADLEN(sizeof(utsname()->nodename))
-#define NLM_netobj_sz          1+XDR_QUADLEN(XDR_MAX_NETOBJ)
-/* #define NLM_owner_sz                1+XDR_QUADLEN(NLM_MAXOWNER) */
+#define NLM_caller_sz          1+XDR_QUADLEN(NLMCLNT_OHSIZE)
+#define NLM_owner_sz           1+XDR_QUADLEN(NLMCLNT_OHSIZE)
 #define NLM_fhandle_sz         1+XDR_QUADLEN(NFS2_FHSIZE)
-#define NLM_lock_sz            3+NLM_caller_sz+NLM_netobj_sz+NLM_fhandle_sz
-#define NLM_holder_sz          4+NLM_netobj_sz
+#define NLM_lock_sz            3+NLM_caller_sz+NLM_owner_sz+NLM_fhandle_sz
+#define NLM_holder_sz          4+NLM_owner_sz
 
 #define NLM_testargs_sz                NLM_cookie_sz+1+NLM_lock_sz
 #define NLM_lockargs_sz                NLM_cookie_sz+4+NLM_lock_sz