linux-kernel - [PATCH review 45/85] sunrpc: Simplify auth_unix now that everything is a kgid

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Message-Id: <1360777934-5663-45-git-send-email-ebiederm@xmission.com>
Date:	Wed, 13 Feb 2013 09:51:34 -0800
From:	"Eric W. Biederman" <ebiederm@...ssion.com>
To:	<linux-fsdevel@...r.kernel.org>
Cc:	Linux Containers <containers@...ts.linux-foundation.org>,
	<linux-kernel@...r.kernel.org>,
	"Serge E. Hallyn" <serge@...lyn.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"J. Bruce Fields" <bfields@...ldses.org>,
	Trond Myklebust <Trond.Myklebust@...app.com>
Subject: [PATCH review 45/85] sunrpc: Simplify auth_unix now that everything is a kgid_t

From: "Eric W. Biederman" <ebiederm@...ssion.com>

In unx_create_cred directly assign gids from acred->group_info
to cred->uc_gids.

In unx_match directly compare uc_gids with group_info.

Now that both group_info and unx_cred gids are stored as kgids
this is valid and the extra layer of translation can be removed.

Cc: "J. Bruce Fields" <bfields@...ldses.org>
Cc: Trond Myklebust <Trond.Myklebust@...app.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com>
---
 net/sunrpc/auth_unix.c |   14 ++++----------
 1 files changed, 4 insertions(+), 10 deletions(-)

diff --git a/net/sunrpc/auth_unix.c b/net/sunrpc/auth_unix.c
index 8365a9c..9f38857 100644
--- a/net/sunrpc/auth_unix.c
+++ b/net/sunrpc/auth_unix.c
@@ -79,11 +79,8 @@ unx_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
 		groups = NFS_NGROUPS;
 
 	cred->uc_gid = acred->gid;
-	for (i = 0; i < groups; i++) {
-		gid_t gid;
-		gid = from_kgid(&init_user_ns, GROUP_AT(acred->group_info, i));
-		cred->uc_gids[i] = gid;
-	}
+	for (i = 0; i < groups; i++)
+		cred->uc_gids[i] = GROUP_AT(acred->group_info, i);
 	if (i < NFS_NGROUPS)
 		cred->uc_gids[i] = INVALID_GID;
 
@@ -130,12 +127,9 @@ unx_match(struct auth_cred *acred, struct rpc_cred *rcred, int flags)
 		groups = acred->group_info->ngroups;
 	if (groups > NFS_NGROUPS)
 		groups = NFS_NGROUPS;
-	for (i = 0; i < groups ; i++) {
-		gid_t gid;
-		gid = from_kgid(&init_user_ns, GROUP_AT(acred->group_info, i));
-		if (cred->uc_gids[i] != gid)
+	for (i = 0; i < groups ; i++)
+		if (!gid_eq(cred->uc_gids[i], GROUP_AT(acred->group_info, i)))
 			return 0;
-	}
 	if (groups < NFS_NGROUPS &&
 	    cred->uc_gids[groups] != INVALID_GID)
 		return 0;
-- 
1.7.5.4

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