[Cluster-devel] GFS2: Fix sgid propagation when using ACLs

[Steven Whitehouse]

>From f9425ad4e5c8f8f9f6297d0358dc44ca058ffe47 Mon Sep 17 00:00:00 2001
From: Steven Whitehouse <swhiteho at redhat.com>
Date: Fri, 4 May 2012 14:33:06 +0100
Subject: [PATCH] GFS2: Fix sgid propagation when using ACLs

This cleans up the mode setting code when creating inodes. The
SGID bit was being reset by setattr_copy() when the user creating a
subdirectory was not in the owning group. When ACLs are in use this
SGID bit should have been propagated if the ACL allows creation of
a subdirectory. GFS2's behaviour now matches that of the other ACL
supporting filesystems in this regard.

Signed-off-by: Steven Whitehouse <swhiteho at redhat.com>

diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c
index 230eb0f..bd4a589 100644
--- a/fs/gfs2/acl.c
+++ b/fs/gfs2/acl.c
@@ -73,12 +73,8 @@ static int gfs2_set_mode(struct inode *inode, umode_t mode)
 	int error = 0;
 
 	if (mode != inode->i_mode) {
-		struct iattr iattr;
-
-		iattr.ia_valid = ATTR_MODE;
-		iattr.ia_mode = mode;
-
-		error = gfs2_setattr_simple(inode, &iattr);
+		inode->i_mode = mode;
+		mark_inode_dirty(inode);
 	}
 
 	return error;
@@ -126,9 +122,7 @@ int gfs2_acl_create(struct gfs2_inode *dip, struct inode *inode)
 		return PTR_ERR(acl);
 	if (!acl) {
 		mode &= ~current_umask();
-		if (mode != inode->i_mode)
-			error = gfs2_set_mode(inode, mode);
-		return error;
+		return gfs2_set_mode(inode, mode);
 	}
 
 	if (S_ISDIR(inode->i_mode)) {
-- 
1.7.4