linux-kernel - [PATCH 21/24] Unionfs: Include file

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Date:	Sun,  7 Jan 2007 23:13:13 -0500
From:	"Josef 'Jeff' Sipek" <jsipek@...sunysb.edu>
To:	linux-kernel@...r.kernel.org
Cc:	linux-fsdevel@...r.kernel.org, hch@...radead.org,
	viro@....linux.org.uk, torvalds@...l.org, akpm@...l.org,
	mhalcrow@...ibm.com, Josef "Jeff" Sipek <jsipek@...sunysb.edu>,
	David Quigley <dquigley@....cs.sunysb.edu>,
	Erez Zadok <ezk@...sunysb.edu>
Subject: [PATCH 21/24] Unionfs: Include file

From: Josef "Jeff" Sipek <jsipek@...sunysb.edu>

Global include file - can be included from userspace by utilities.

Signed-off-by: Josef "Jeff" Sipek <jsipek@...sunysb.edu>
Signed-off-by: David Quigley <dquigley@....cs.sunysb.edu>
Signed-off-by: Erez Zadok <ezk@...sunysb.edu>
---
 include/linux/magic.h    |    2 ++
 include/linux/union_fs.h |   18 ++++++++++++++++++
 2 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/include/linux/magic.h b/include/linux/magic.h
index b78bbf4..ab4261c 100644
--- a/include/linux/magic.h
+++ b/include/linux/magic.h
@@ -33,6 +33,8 @@
 #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
 
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 */
+
-- 
1.4.4.2

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