GIT: unionfs2-2.6.27.y: Unionfs: Include file

[Erez Zadok]

commit 73d1e5d4ddd24da51dc6239ebeb2c3de75ed3537
Author: Josef "Jeff" Sipek <jsipek at cs.sunysb.edu>
Date:   Sun Jan 21 18:47:43 2007 -0500

    Unionfs: Include file
    
    Global include file - can be included from userspace by utilities.
    
    Signed-off-by: Josef "Jeff" Sipek <jsipek at cs.sunysb.edu>
    Signed-off-by: David Quigley <dquigley at fsl.cs.sunysb.edu>
    Signed-off-by: Erez Zadok <ezk at cs.sunysb.edu>

diff --git a/include/linux/magic.h b/include/linux/magic.h
index 1fa0c2c..67043ed 100644
--- a/include/linux/magic.h
+++ b/include/linux/magic.h
@@ -35,6 +35,8 @@
 #define REISER2FS_SUPER_MAGIC_STRING	"ReIsEr2Fs"
 #define REISER2FS_JR_SUPER_MAGIC_STRING	"ReIsEr3Fs"
 
+#define UNIONFS_SUPER_MAGIC 0xf15f083d
+
 #define SMB_SUPER_MAGIC		0x517B
 #define USBDEVICE_SUPER_MAGIC	0x9fa2
 #define CGROUP_SUPER_MAGIC	0x27e0eb
diff --git a/include/linux/union_fs.h b/include/linux/union_fs.h
new file mode 100644
index 0000000..b724031
--- /dev/null
+++ b/include/linux/union_fs.h
@@ -0,0 +1,18 @@
+#ifndef _LINUX_UNION_FS_H
+#define _LINUX_UNION_FS_H
+
+#define UNIONFS_VERSION  "2.0"
+/*
+ * DEFINITIONS FOR USER AND KERNEL CODE:
+ */
+# define UNIONFS_IOCTL_INCGEN		_IOR(0x15, 11, int)
+# define UNIONFS_IOCTL_QUERYFILE	_IOR(0x15, 15, int)
+
+/* We don't support normal remount, but unionctl uses it. */
+# define UNIONFS_REMOUNT_MAGIC		0x4a5a4380
+
+/* should be at least LAST_USED_UNIONFS_PERMISSION<<1 */
+#define MAY_NFSRO			16
+
+#endif /* _LINUX_UNIONFS_H */
+