[XFS] fix 32-bit compat ioctls for GETXFLAGS, SETXFLAGS, GETVERSION

XFS_IOC_GETVERSION, XFS_IOC_GETXFLAGS and XFS_IOC_SETXFLAGS all take a
"long" which changes size between 32 and 64 bit platforms.

So, the ioctl cmds that come in from a 32-bit app aren't as expected, for
example on GETXFLAGS,

unknown cmd fd(3) cmd(80046601){t:'f';sz:4}

due to the size mismatch.

So, use instead the 32-bit version of the commands for compat ioctls, and
other than that it doesn't take any more manipulation.

Also, for both native and compat versions, just define them to the values
as defined in fs.h

SGI-PV: 971186
SGI-Modid: xfs-linux-melb:xfs-kern:29849a

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/fs/xfs/xfs_fs.h b/fs/xfs/xfs_fs.h
index aab966276517..3bed6433d050 100644
--- a/fs/xfs/xfs_fs.h
+++ b/fs/xfs/xfs_fs.h
@@ -419,9 +419,13 @@ typedef struct xfs_handle {
 /*
  * ioctl commands that are used by Linux filesystems
  */
-#define XFS_IOC_GETXFLAGS       _IOR('f', 1, long)
-#define XFS_IOC_SETXFLAGS       _IOW('f', 2, long)
-#define XFS_IOC_GETVERSION      _IOR('v', 1, long)
+#define XFS_IOC_GETXFLAGS       FS_IOC_GETFLAGS
+#define XFS_IOC_SETXFLAGS       FS_IOC_SETFLAGS
+#define XFS_IOC_GETVERSION      FS_IOC_GETVERSION
+/* 32-bit compat counterparts */
+#define XFS_IOC32_GETXFLAGS     FS_IOC32_GETFLAGS
+#define XFS_IOC32_SETXFLAGS     FS_IOC32_SETFLAGS
+#define XFS_IOC32_GETVERSION    FS_IOC32_GETVERSION
 
 /*
  * ioctl commands that replace IRIX fcntl()'s