patch-2.4.25 linux-2.4.25/fs/xfs/xfs_mac.c

• Lines: 73
• Date: 2004-02-18 05:36:32.000000000 -0800
• Orig file: linux-2.4.24/fs/xfs/xfs_mac.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.24/fs/xfs/xfs_mac.c linux-2.4.25/fs/xfs/xfs_mac.c
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+
+#include "xfs.h"
+
+static xfs_mac_label_t *mac_low_high_lp;
+static xfs_mac_label_t *mac_high_low_lp;
+static xfs_mac_label_t *mac_admin_high_lp;
+static xfs_mac_label_t *mac_equal_equal_lp;
+
+/*
+ * Test for the existence of a MAC label as efficiently as possible.
+ */
+int
+xfs_mac_vhaslabel(
+	vnode_t		*vp)
+{
+	int		error;
+	int		len = sizeof(xfs_mac_label_t);
+	int		flags = ATTR_KERNOVAL|ATTR_ROOT;
+
+	VOP_ATTR_GET(vp, SGI_MAC_FILE, NULL, &len, flags, sys_cred, error);
+	return (error == 0);
+}
+
+int
+xfs_mac_iaccess(xfs_inode_t *ip, mode_t mode, struct cred *cr)
+{
+	xfs_mac_label_t mac;
+	xfs_mac_label_t *mp = mac_high_low_lp;
+
+	if (cr == NULL || sys_cred == NULL ) {
+		return EACCES;
+	}
+
+	if (xfs_attr_fetch(ip, SGI_MAC_FILE, (char *)&mac, sizeof(mac)) == 0) {
+		if ((mp = mac_add_label(&mac)) == NULL) {
+			return mac_access(mac_high_low_lp, cr, mode);
+		}
+	}
+
+	return mac_access(mp, cr, mode);
+}