X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=net%2Fsunrpc%2Fauth_generic.c;h=4028502f052858b1d66af4b31c17d641c16fac0b;hb=a8005992836434cab6182c6147993d21442184c1;hp=d927d9f574121f94d9477cda3670e960f8f147c7;hpb=bf16ae250999e76aff0491a362073a552db965fc;p=linux-2.6-omap-h63xx.git

diff --git a/net/sunrpc/auth_generic.c b/net/sunrpc/auth_generic.c
index d927d9f5741..4028502f052 100644
--- a/net/sunrpc/auth_generic.c
+++ b/net/sunrpc/auth_generic.c
@@ -17,8 +17,8 @@
 # define RPCDBG_FACILITY	RPCDBG_AUTH
 #endif
 
-#define RPC_ANONYMOUS_USERID	((uid_t)-2)
-#define RPC_ANONYMOUS_GROUPID	((gid_t)-2)
+#define RPC_MACHINE_CRED_USERID		((uid_t)0)
+#define RPC_MACHINE_CRED_GROUPID	((gid_t)0)
 
 struct generic_cred {
 	struct rpc_cred gc_base;
@@ -44,8 +44,8 @@ EXPORT_SYMBOL_GPL(rpc_lookup_cred);
 struct rpc_cred *rpc_lookup_machine_cred(void)
 {
 	struct auth_cred acred = {
-		.uid = RPC_ANONYMOUS_USERID,
-		.gid = RPC_ANONYMOUS_GROUPID,
+		.uid = RPC_MACHINE_CRED_USERID,
+		.gid = RPC_MACHINE_CRED_GROUPID,
 		.machine_cred = 1,
 	};
 
@@ -133,13 +133,29 @@ static int
 generic_match(struct auth_cred *acred, struct rpc_cred *cred, int flags)
 {
 	struct generic_cred *gcred = container_of(cred, struct generic_cred, gc_base);
+	int i;
 
 	if (gcred->acred.uid != acred->uid ||
 	    gcred->acred.gid != acred->gid ||
-	    gcred->acred.group_info != acred->group_info ||
 	    gcred->acred.machine_cred != acred->machine_cred)
-		return 0;
+		goto out_nomatch;
+
+	/* Optimisation in the case where pointers are identical... */
+	if (gcred->acred.group_info == acred->group_info)
+		goto out_match;
+
+	/* Slow path... */
+	if (gcred->acred.group_info->ngroups != acred->group_info->ngroups)
+		goto out_nomatch;
+	for (i = 0; i < gcred->acred.group_info->ngroups; i++) {
+		if (GROUP_AT(gcred->acred.group_info, i) !=
+				GROUP_AT(acred->group_info, i))
+			goto out_nomatch;
+	}
+out_match:
 	return 1;
+out_nomatch:
+	return 0;
 }
 
 void __init rpc_init_generic_auth(void)