[PATCH] xfs: add an x86 compat handler for XFS_IOC_ZERO_RANGE

[Christoph Hellwig <hch@xxxxxxxxxxxxx>]

XFS_IOC_ZERO_RANGE uses struct xfs_flock64, and thus requires argument
translation for 32-bit binaries on x86.  Add the required
XFS_IOC_ZERO_RANGE_32 defined and add it to the list of commands that
require xfs_flock64 translation.  

Signed-off-by: Christoph Hellwig <hch@xxxxxx>

Index: xfs/fs/xfs/linux-2.6/xfs_ioctl32.c
===================================================================
--- xfs.orig/fs/xfs/linux-2.6/xfs_ioctl32.c     2011-04-21 15:04:11.871434170 
+0200
+++ xfs/fs/xfs/linux-2.6/xfs_ioctl32.c  2011-04-21 15:06:46.680595497 +0200
@@ -586,7 +586,8 @@ xfs_file_compat_ioctl(
        case XFS_IOC_RESVSP_32:
        case XFS_IOC_UNRESVSP_32:
        case XFS_IOC_RESVSP64_32:
-       case XFS_IOC_UNRESVSP64_32: {
+       case XFS_IOC_UNRESVSP64_32:
+       case XFS_IOC_ZERO_RANGE_32: {
                struct xfs_flock64      bf;
 
                if (xfs_compat_flock64_copyin(&bf, arg))
Index: xfs/fs/xfs/linux-2.6/xfs_ioctl32.h
===================================================================
--- xfs.orig/fs/xfs/linux-2.6/xfs_ioctl32.h     2011-04-21 15:06:41.437290568 
+0200
+++ xfs/fs/xfs/linux-2.6/xfs_ioctl32.h  2011-04-21 15:07:26.550379502 +0200
@@ -184,6 +184,7 @@ typedef struct compat_xfs_flock64 {
 #define XFS_IOC_UNRESVSP_32    _IOW('X', 41, struct compat_xfs_flock64)
 #define XFS_IOC_RESVSP64_32    _IOW('X', 42, struct compat_xfs_flock64)
 #define XFS_IOC_UNRESVSP64_32  _IOW('X', 43, struct compat_xfs_flock64)
+#define XFS_IOC_ZERO_RANGE_32  _IOW('X', 57, struct compat_xfs_flock64)
 
 typedef struct compat_xfs_fsop_geom_v1 {
        __u32           blocksize;      /* filesystem (data) block size */