linux-kernel - [PATCH] Separate FMODE_PREAD/FMODE

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Date:	Wed, 4 Feb 2009 18:06:11 -0800 (PST)
From:	Paul Turner <pjt@...gle.com>
To:	akpm@...ux-foundation.org
cc:	linux-kernel@...r.kernel.org, adobriyan@...il.com,
	ebierderm@...ssion.com
Subject: [PATCH] Separate FMODE_PREAD/FMODE_PWRITE into separate flags

Separate FMODE_PREAD and FMODE_PWRITE into separate flags to reflect the
reality that the read and write paths may have independent restrictions.

A git grep verifies that these flags are always cleared together so this new
behavior will only apply to interfaces that change to clear flags individually.

Signed-off-by: Paul Turner <pjt@...gle.com>
---
 include/linux/fs.h |   13 +++++++------
 1 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 6022f44..d6a51d9 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -60,18 +60,19 @@ struct inodes_stat_t {
 #define FMODE_WRITE		((__force fmode_t)2)
 /* file is seekable */
 #define FMODE_LSEEK		((__force fmode_t)4)
-/* file can be accessed using pread/pwrite */
+/* file can be accessed using pread */
 #define FMODE_PREAD		((__force fmode_t)8)
-#define FMODE_PWRITE		FMODE_PREAD	/* These go hand in hand */
+/* file can be accessed using pwrite */
+#define FMODE_PWRITE		((__force fmode_t)16)
 /* File is opened for execution with sys_execve / sys_uselib */
-#define FMODE_EXEC		((__force fmode_t)16)
+#define FMODE_EXEC		((__force fmode_t)32)
 /* File is opened with O_NDELAY (only set for block devices) */
-#define FMODE_NDELAY		((__force fmode_t)32)
+#define FMODE_NDELAY		((__force fmode_t)64)
 /* File is opened with O_EXCL (only set for block devices) */
-#define FMODE_EXCL		((__force fmode_t)64)
+#define FMODE_EXCL		((__force fmode_t)128)
 /* File is opened using open(.., 3, ..) and is writeable only for ioctls
    (specialy hack for floppy.c) */
-#define FMODE_WRITE_IOCTL	((__force fmode_t)128)
+#define FMODE_WRITE_IOCTL	((__force fmode_t)256)
 
 /*
  * Don't update ctime and mtime.
-- 
1.5.4.5

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