xfs_ioctl32.c 17.8 KB
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/*
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 * Copyright (c) 2004-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
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 *
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 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
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 * published by the Free Software Foundation.
 *
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 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 */
#include <linux/compat.h>
#include <linux/ioctl.h>
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#include <linux/mount.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include <linux/fsmap.h>
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#include "xfs.h"
#include "xfs_fs.h"
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#include "xfs_format.h"
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#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
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#include "xfs_mount.h"
#include "xfs_inode.h"
#include "xfs_itable.h"
#include "xfs_error.h"
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#include "xfs_fsops.h"
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#include "xfs_alloc.h"
#include "xfs_rtalloc.h"
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#include "xfs_attr.h"
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#include "xfs_ioctl.h"
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#include "xfs_ioctl32.h"
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#include "xfs_trace.h"
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#define  _NATIVE_IOC(cmd, type) \
	  _IOC(_IOC_DIR(cmd), _IOC_TYPE(cmd), _IOC_NR(cmd), sizeof(type))

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#ifdef BROKEN_X86_ALIGNMENT
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STATIC int
xfs_compat_flock64_copyin(
	xfs_flock64_t		*bf,
	compat_xfs_flock64_t	__user *arg32)
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{
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	if (get_user(bf->l_type,	&arg32->l_type) ||
	    get_user(bf->l_whence,	&arg32->l_whence) ||
	    get_user(bf->l_start,	&arg32->l_start) ||
	    get_user(bf->l_len,		&arg32->l_len) ||
	    get_user(bf->l_sysid,	&arg32->l_sysid) ||
	    get_user(bf->l_pid,		&arg32->l_pid) ||
	    copy_from_user(bf->l_pad,	&arg32->l_pad,	4*sizeof(u32)))
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		return -EFAULT;
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	return 0;
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}

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STATIC int
xfs_compat_ioc_fsgeometry_v1(
	struct xfs_mount	  *mp,
	compat_xfs_fsop_geom_v1_t __user *arg32)
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{
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	xfs_fsop_geom_t		  fsgeo;
	int			  error;
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	error = xfs_fs_geometry(mp, &fsgeo, 3);
	if (error)
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		return error;
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	/* The 32-bit variant simply has some padding at the end */
	if (copy_to_user(arg32, &fsgeo, sizeof(struct compat_xfs_fsop_geom_v1)))
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		return -EFAULT;
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	return 0;
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}

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STATIC int
xfs_compat_growfs_data_copyin(
	struct xfs_growfs_data	 *in,
	compat_xfs_growfs_data_t __user *arg32)
{
	if (get_user(in->newblocks, &arg32->newblocks) ||
	    get_user(in->imaxpct,   &arg32->imaxpct))
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		return -EFAULT;
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	return 0;
}

STATIC int
xfs_compat_growfs_rt_copyin(
	struct xfs_growfs_rt	 *in,
	compat_xfs_growfs_rt_t	__user *arg32)
{
	if (get_user(in->newblocks, &arg32->newblocks) ||
	    get_user(in->extsize,   &arg32->extsize))
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		return -EFAULT;
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	return 0;
}

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STATIC int
xfs_inumbers_fmt_compat(
	void			__user *ubuffer,
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	const struct xfs_inogrp	*buffer,
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	long			count,
	long			*written)
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{
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	compat_xfs_inogrp_t	__user *p32 = ubuffer;
	long			i;
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	for (i = 0; i < count; i++) {
		if (put_user(buffer[i].xi_startino,   &p32[i].xi_startino) ||
		    put_user(buffer[i].xi_alloccount, &p32[i].xi_alloccount) ||
		    put_user(buffer[i].xi_allocmask,  &p32[i].xi_allocmask))
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			return -EFAULT;
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	}
	*written = count * sizeof(*p32);
	return 0;
}

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#else
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#define xfs_inumbers_fmt_compat xfs_inumbers_fmt
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#endif	/* BROKEN_X86_ALIGNMENT */
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STATIC int
xfs_ioctl32_bstime_copyin(
	xfs_bstime_t		*bstime,
	compat_xfs_bstime_t	__user *bstime32)
{
	compat_time_t		sec32;	/* tv_sec differs on 64 vs. 32 */

	if (get_user(sec32,		&bstime32->tv_sec)	||
	    get_user(bstime->tv_nsec,	&bstime32->tv_nsec))
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		return -EFAULT;
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	bstime->tv_sec = sec32;
	return 0;
}

/* xfs_bstat_t has differing alignment on intel, & bstime_t sizes everywhere */
STATIC int
xfs_ioctl32_bstat_copyin(
	xfs_bstat_t		*bstat,
	compat_xfs_bstat_t	__user *bstat32)
{
	if (get_user(bstat->bs_ino,	&bstat32->bs_ino)	||
	    get_user(bstat->bs_mode,	&bstat32->bs_mode)	||
	    get_user(bstat->bs_nlink,	&bstat32->bs_nlink)	||
	    get_user(bstat->bs_uid,	&bstat32->bs_uid)	||
	    get_user(bstat->bs_gid,	&bstat32->bs_gid)	||
	    get_user(bstat->bs_rdev,	&bstat32->bs_rdev)	||
	    get_user(bstat->bs_blksize,	&bstat32->bs_blksize)	||
	    get_user(bstat->bs_size,	&bstat32->bs_size)	||
	    xfs_ioctl32_bstime_copyin(&bstat->bs_atime, &bstat32->bs_atime) ||
	    xfs_ioctl32_bstime_copyin(&bstat->bs_mtime, &bstat32->bs_mtime) ||
	    xfs_ioctl32_bstime_copyin(&bstat->bs_ctime, &bstat32->bs_ctime) ||
	    get_user(bstat->bs_blocks,	&bstat32->bs_size)	||
	    get_user(bstat->bs_xflags,	&bstat32->bs_size)	||
	    get_user(bstat->bs_extsize,	&bstat32->bs_extsize)	||
	    get_user(bstat->bs_extents,	&bstat32->bs_extents)	||
	    get_user(bstat->bs_gen,	&bstat32->bs_gen)	||
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	    get_user(bstat->bs_projid_lo, &bstat32->bs_projid_lo) ||
	    get_user(bstat->bs_projid_hi, &bstat32->bs_projid_hi) ||
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	    get_user(bstat->bs_forkoff,	&bstat32->bs_forkoff)	||
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	    get_user(bstat->bs_dmevmask, &bstat32->bs_dmevmask)	||
	    get_user(bstat->bs_dmstate,	&bstat32->bs_dmstate)	||
	    get_user(bstat->bs_aextents, &bstat32->bs_aextents))
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		return -EFAULT;
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	return 0;
}

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/* XFS_IOC_FSBULKSTAT and friends */

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STATIC int
xfs_bstime_store_compat(
	compat_xfs_bstime_t	__user *p32,
	const xfs_bstime_t	*p)
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{
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	__s32			sec32;
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	sec32 = p->tv_sec;
	if (put_user(sec32, &p32->tv_sec) ||
	    put_user(p->tv_nsec, &p32->tv_nsec))
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		return -EFAULT;
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	return 0;
}

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/* Return 0 on success or positive error (to xfs_bulkstat()) */
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STATIC int
xfs_bulkstat_one_fmt_compat(
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	void			__user *ubuffer,
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	int			ubsize,
	int			*ubused,
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	const xfs_bstat_t	*buffer)
{
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	compat_xfs_bstat_t	__user *p32 = ubuffer;
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	if (ubsize < sizeof(*p32))
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		return -ENOMEM;
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	if (put_user(buffer->bs_ino,	  &p32->bs_ino)		||
	    put_user(buffer->bs_mode,	  &p32->bs_mode)	||
	    put_user(buffer->bs_nlink,	  &p32->bs_nlink)	||
	    put_user(buffer->bs_uid,	  &p32->bs_uid)		||
	    put_user(buffer->bs_gid,	  &p32->bs_gid)		||
	    put_user(buffer->bs_rdev,	  &p32->bs_rdev)	||
	    put_user(buffer->bs_blksize,  &p32->bs_blksize)	||
	    put_user(buffer->bs_size,	  &p32->bs_size)	||
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	    xfs_bstime_store_compat(&p32->bs_atime, &buffer->bs_atime) ||
	    xfs_bstime_store_compat(&p32->bs_mtime, &buffer->bs_mtime) ||
	    xfs_bstime_store_compat(&p32->bs_ctime, &buffer->bs_ctime) ||
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	    put_user(buffer->bs_blocks,	  &p32->bs_blocks)	||
	    put_user(buffer->bs_xflags,	  &p32->bs_xflags)	||
	    put_user(buffer->bs_extsize,  &p32->bs_extsize)	||
	    put_user(buffer->bs_extents,  &p32->bs_extents)	||
	    put_user(buffer->bs_gen,	  &p32->bs_gen)		||
	    put_user(buffer->bs_projid,	  &p32->bs_projid)	||
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	    put_user(buffer->bs_projid_hi,	&p32->bs_projid_hi)	||
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	    put_user(buffer->bs_forkoff,  &p32->bs_forkoff)	||
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	    put_user(buffer->bs_dmevmask, &p32->bs_dmevmask)	||
	    put_user(buffer->bs_dmstate,  &p32->bs_dmstate)	||
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	    put_user(buffer->bs_aextents, &p32->bs_aextents))
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		return -EFAULT;
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	if (ubused)
		*ubused = sizeof(*p32);
	return 0;
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}

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STATIC int
xfs_bulkstat_one_compat(
	xfs_mount_t	*mp,		/* mount point for filesystem */
	xfs_ino_t	ino,		/* inode number to get data for */
	void		__user *buffer,	/* buffer to place output in */
	int		ubsize,		/* size of buffer */
	int		*ubused,	/* bytes used by me */
	int		*stat)		/* BULKSTAT_RV_... */
{
	return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
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				    xfs_bulkstat_one_fmt_compat,
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				    ubused, stat);
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}

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/* copied from xfs_ioctl.c */
STATIC int
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xfs_compat_ioc_bulkstat(
	xfs_mount_t		  *mp,
	unsigned int		  cmd,
	compat_xfs_fsop_bulkreq_t __user *p32)
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{
	u32			addr;
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	xfs_fsop_bulkreq_t	bulkreq;
	int			count;	/* # of records returned */
	xfs_ino_t		inlast;	/* last inode number */
	int			done;
	int			error;

	/* done = 1 if there are more stats to get and if bulkstat */
	/* should be called again (unused here, but used in dmapi) */
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	if (!capable(CAP_SYS_ADMIN))
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		return -EPERM;
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	if (XFS_FORCED_SHUTDOWN(mp))
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		return -EIO;
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	if (get_user(addr, &p32->lastip))
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		return -EFAULT;
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	bulkreq.lastip = compat_ptr(addr);
	if (get_user(bulkreq.icount, &p32->icount) ||
	    get_user(addr, &p32->ubuffer))
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		return -EFAULT;
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	bulkreq.ubuffer = compat_ptr(addr);
	if (get_user(addr, &p32->ocount))
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		return -EFAULT;
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	bulkreq.ocount = compat_ptr(addr);
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	if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
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		return -EFAULT;
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	if ((count = bulkreq.icount) <= 0)
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		return -EINVAL;
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	if (bulkreq.ubuffer == NULL)
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		return -EINVAL;
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	if (cmd == XFS_IOC_FSINUMBERS_32) {
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		error = xfs_inumbers(mp, &inlast, &count,
				bulkreq.ubuffer, xfs_inumbers_fmt_compat);
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	} else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE_32) {
		int res;

		error = xfs_bulkstat_one_compat(mp, inlast, bulkreq.ubuffer,
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				sizeof(compat_xfs_bstat_t), NULL, &res);
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	} else if (cmd == XFS_IOC_FSBULKSTAT_32) {
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		error = xfs_bulkstat(mp, &inlast, &count,
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			xfs_bulkstat_one_compat, sizeof(compat_xfs_bstat_t),
			bulkreq.ubuffer, &done);
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	} else
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		error = -EINVAL;
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	if (error)
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		return error;
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	if (bulkreq.ocount != NULL) {
		if (copy_to_user(bulkreq.lastip, &inlast,
						sizeof(xfs_ino_t)))
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			return -EFAULT;
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		if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
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			return -EFAULT;
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	}

	return 0;
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}
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STATIC int
xfs_compat_handlereq_copyin(
	xfs_fsop_handlereq_t		*hreq,
	compat_xfs_fsop_handlereq_t	__user *arg32)
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{
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	compat_xfs_fsop_handlereq_t	hreq32;

	if (copy_from_user(&hreq32, arg32, sizeof(compat_xfs_fsop_handlereq_t)))
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		return -EFAULT;
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	hreq->fd = hreq32.fd;
	hreq->path = compat_ptr(hreq32.path);
	hreq->oflags = hreq32.oflags;
	hreq->ihandle = compat_ptr(hreq32.ihandle);
	hreq->ihandlen = hreq32.ihandlen;
	hreq->ohandle = compat_ptr(hreq32.ohandle);
	hreq->ohandlen = compat_ptr(hreq32.ohandlen);

	return 0;
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}

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STATIC struct dentry *
xfs_compat_handlereq_to_dentry(
	struct file		*parfilp,
	compat_xfs_fsop_handlereq_t *hreq)
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{
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	return xfs_handle_to_dentry(parfilp,
			compat_ptr(hreq->ihandle), hreq->ihandlen);
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}

STATIC int
xfs_compat_attrlist_by_handle(
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	struct file		*parfilp,
	void			__user *arg)
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{
	int			error;
	attrlist_cursor_kern_t	*cursor;
	compat_xfs_fsop_attrlist_handlereq_t al_hreq;
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	struct dentry		*dentry;
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	char			*kbuf;

	if (!capable(CAP_SYS_ADMIN))
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		return -EPERM;
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	if (copy_from_user(&al_hreq, arg,
			   sizeof(compat_xfs_fsop_attrlist_handlereq_t)))
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		return -EFAULT;
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	if (al_hreq.buflen < sizeof(struct attrlist) ||
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	    al_hreq.buflen > XFS_XATTR_LIST_MAX)
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		return -EINVAL;
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	/*
	 * Reject flags, only allow namespaces.
	 */
	if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
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		return -EINVAL;
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	dentry = xfs_compat_handlereq_to_dentry(parfilp, &al_hreq.hreq);
	if (IS_ERR(dentry))
		return PTR_ERR(dentry);
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	error = -ENOMEM;
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	kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
	if (!kbuf)
		goto out_dput;
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	cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
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	error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
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					al_hreq.flags, cursor);
	if (error)
		goto out_kfree;

	if (copy_to_user(compat_ptr(al_hreq.buffer), kbuf, al_hreq.buflen))
		error = -EFAULT;

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out_kfree:
	kmem_free(kbuf);
out_dput:
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	dput(dentry);
	return error;
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}

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STATIC int
xfs_compat_attrmulti_by_handle(
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	struct file				*parfilp,
	void					__user *arg)
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{
	int					error;
	compat_xfs_attr_multiop_t		*ops;
	compat_xfs_fsop_attrmulti_handlereq_t	am_hreq;
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	struct dentry				*dentry;
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	unsigned int				i, size;
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	unsigned char				*attr_name;
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	if (!capable(CAP_SYS_ADMIN))
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		return -EPERM;
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	if (copy_from_user(&am_hreq, arg,
			   sizeof(compat_xfs_fsop_attrmulti_handlereq_t)))
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		return -EFAULT;
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	/* overflow check */
	if (am_hreq.opcount >= INT_MAX / sizeof(compat_xfs_attr_multiop_t))
		return -E2BIG;

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	dentry = xfs_compat_handlereq_to_dentry(parfilp, &am_hreq.hreq);
	if (IS_ERR(dentry))
		return PTR_ERR(dentry);
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	error = -E2BIG;
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	size = am_hreq.opcount * sizeof(compat_xfs_attr_multiop_t);
	if (!size || size > 16 * PAGE_SIZE)
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		goto out_dput;
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	ops = memdup_user(compat_ptr(am_hreq.ops), size);
	if (IS_ERR(ops)) {
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		error = PTR_ERR(ops);
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		goto out_dput;
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	}
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	error = -ENOMEM;
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	attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
	if (!attr_name)
		goto out_kfree_ops;

	error = 0;
	for (i = 0; i < am_hreq.opcount; i++) {
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		ops[i].am_error = strncpy_from_user((char *)attr_name,
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				compat_ptr(ops[i].am_attrname),
				MAXNAMELEN);
		if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
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			error = -ERANGE;
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		if (ops[i].am_error < 0)
			break;

		switch (ops[i].am_opcode) {
		case ATTR_OP_GET:
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			ops[i].am_error = xfs_attrmulti_attr_get(
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					d_inode(dentry), attr_name,
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					compat_ptr(ops[i].am_attrvalue),
					&ops[i].am_length, ops[i].am_flags);
			break;
		case ATTR_OP_SET:
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			ops[i].am_error = mnt_want_write_file(parfilp);
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			if (ops[i].am_error)
				break;
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			ops[i].am_error = xfs_attrmulti_attr_set(
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					d_inode(dentry), attr_name,
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					compat_ptr(ops[i].am_attrvalue),
					ops[i].am_length, ops[i].am_flags);
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			mnt_drop_write_file(parfilp);
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			break;
		case ATTR_OP_REMOVE:
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			ops[i].am_error = mnt_want_write_file(parfilp);
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			if (ops[i].am_error)
				break;
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			ops[i].am_error = xfs_attrmulti_attr_remove(
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					d_inode(dentry), attr_name,
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					ops[i].am_flags);
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			mnt_drop_write_file(parfilp);
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			break;
		default:
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			ops[i].am_error = -EINVAL;
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		}
	}

	if (copy_to_user(compat_ptr(am_hreq.ops), ops, size))
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		error = -EFAULT;
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	kfree(attr_name);
 out_kfree_ops:
	kfree(ops);
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 out_dput:
	dput(dentry);
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	return error;
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}

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STATIC int
xfs_compat_fssetdm_by_handle(
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	struct file		*parfilp,
	void			__user *arg)
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{
	int			error;
	struct fsdmidata	fsd;
	compat_xfs_fsop_setdm_handlereq_t dmhreq;
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	struct dentry		*dentry;
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	if (!capable(CAP_MKNOD))
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		return -EPERM;
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	if (copy_from_user(&dmhreq, arg,
			   sizeof(compat_xfs_fsop_setdm_handlereq_t)))
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		return -EFAULT;
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	dentry = xfs_compat_handlereq_to_dentry(parfilp, &dmhreq.hreq);
	if (IS_ERR(dentry))
		return PTR_ERR(dentry);
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	if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
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		error = -EPERM;
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		goto out;
	}

	if (copy_from_user(&fsd, compat_ptr(dmhreq.data), sizeof(fsd))) {
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		error = -EFAULT;
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		goto out;
	}

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	error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask,
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				 fsd.fsd_dmstate);

out:
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	dput(dentry);
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	return error;
}

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long
xfs_file_compat_ioctl(
	struct file		*filp,
	unsigned		cmd,
	unsigned long		p)
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{
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	struct inode		*inode = file_inode(filp);
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	struct xfs_inode	*ip = XFS_I(inode);
	struct xfs_mount	*mp = ip->i_mount;
	void			__user *arg = (void __user *)p;
	int			error;

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	trace_xfs_file_compat_ioctl(ip);
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	switch (cmd) {
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	/* No size or alignment issues on any arch */
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	case XFS_IOC_DIOINFO:
	case XFS_IOC_FSGEOMETRY:
	case XFS_IOC_FSGETXATTR:
	case XFS_IOC_FSSETXATTR:
	case XFS_IOC_FSGETXATTRA:
	case XFS_IOC_FSSETDM:
	case XFS_IOC_GETBMAP:
	case XFS_IOC_GETBMAPA:
	case XFS_IOC_GETBMAPX:
	case XFS_IOC_FSCOUNTS:
	case XFS_IOC_SET_RESBLKS:
	case XFS_IOC_GET_RESBLKS:
	case XFS_IOC_FSGROWFSLOG:
	case XFS_IOC_GOINGDOWN:
	case XFS_IOC_ERROR_INJECTION:
	case XFS_IOC_ERROR_CLEARALL:
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	case FS_IOC_GETFSMAP:
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	case XFS_IOC_SCRUB_METADATA:
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		return xfs_file_ioctl(filp, cmd, p);
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#ifndef BROKEN_X86_ALIGNMENT
	/* These are handled fine if no alignment issues */
	case XFS_IOC_ALLOCSP:
	case XFS_IOC_FREESP:
	case XFS_IOC_RESVSP:
	case XFS_IOC_UNRESVSP:
	case XFS_IOC_ALLOCSP64:
	case XFS_IOC_FREESP64:
	case XFS_IOC_RESVSP64:
	case XFS_IOC_UNRESVSP64:
	case XFS_IOC_FSGEOMETRY_V1:
	case XFS_IOC_FSGROWFSDATA:
	case XFS_IOC_FSGROWFSRT:
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	case XFS_IOC_ZERO_RANGE:
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		return xfs_file_ioctl(filp, cmd, p);
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#else
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	case XFS_IOC_ALLOCSP_32:
	case XFS_IOC_FREESP_32:
	case XFS_IOC_ALLOCSP64_32:
	case XFS_IOC_FREESP64_32:
	case XFS_IOC_RESVSP_32:
	case XFS_IOC_UNRESVSP_32:
	case XFS_IOC_RESVSP64_32:
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	case XFS_IOC_UNRESVSP64_32:
	case XFS_IOC_ZERO_RANGE_32: {
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		struct xfs_flock64	bf;

		if (xfs_compat_flock64_copyin(&bf, arg))
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			return -EFAULT;
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		cmd = _NATIVE_IOC(cmd, struct xfs_flock64);
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		return xfs_ioc_space(filp, cmd, &bf);
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	}
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	case XFS_IOC_FSGEOMETRY_V1_32:
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		return xfs_compat_ioc_fsgeometry_v1(mp, arg);
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	case XFS_IOC_FSGROWFSDATA_32: {
		struct xfs_growfs_data	in;

		if (xfs_compat_growfs_data_copyin(&in, arg))
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			return -EFAULT;
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		error = mnt_want_write_file(filp);
		if (error)
			return error;
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		error = xfs_growfs_data(mp, &in);
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		mnt_drop_write_file(filp);
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		return error;
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	}
	case XFS_IOC_FSGROWFSRT_32: {
		struct xfs_growfs_rt	in;

		if (xfs_compat_growfs_rt_copyin(&in, arg))
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			return -EFAULT;
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		error = mnt_want_write_file(filp);
		if (error)
			return error;
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		error = xfs_growfs_rt(mp, &in);
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		mnt_drop_write_file(filp);
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		return error;
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	}
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#endif
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	/* long changes size, but xfs only copiese out 32 bits */
	case XFS_IOC_GETXFLAGS_32:
	case XFS_IOC_SETXFLAGS_32:
	case XFS_IOC_GETVERSION_32:
		cmd = _NATIVE_IOC(cmd, long);
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		return xfs_file_ioctl(filp, cmd, p);
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	case XFS_IOC_SWAPEXT_32: {
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		struct xfs_swapext	  sxp;
		struct compat_xfs_swapext __user *sxu = arg;

		/* Bulk copy in up to the sx_stat field, then copy bstat */
		if (copy_from_user(&sxp, sxu,
				   offsetof(struct xfs_swapext, sx_stat)) ||
		    xfs_ioctl32_bstat_copyin(&sxp.sx_stat, &sxu->sx_stat))
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			return -EFAULT;
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		error = mnt_want_write_file(filp);
		if (error)
			return error;
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		error = xfs_ioc_swapext(&sxp);
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		mnt_drop_write_file(filp);
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		return error;
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	}
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	case XFS_IOC_FSBULKSTAT_32:
	case XFS_IOC_FSBULKSTAT_SINGLE_32:
	case XFS_IOC_FSINUMBERS_32:
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		return xfs_compat_ioc_bulkstat(mp, cmd, arg);
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	case XFS_IOC_FD_TO_HANDLE_32:
	case XFS_IOC_PATH_TO_HANDLE_32:
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	case XFS_IOC_PATH_TO_FSHANDLE_32: {
		struct xfs_fsop_handlereq	hreq;

		if (xfs_compat_handlereq_copyin(&hreq, arg))
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			return -EFAULT;
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		cmd = _NATIVE_IOC(cmd, struct xfs_fsop_handlereq);
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		return xfs_find_handle(cmd, &hreq);
	}
	case XFS_IOC_OPEN_BY_HANDLE_32: {
		struct xfs_fsop_handlereq	hreq;

		if (xfs_compat_handlereq_copyin(&hreq, arg))
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			return -EFAULT;
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		return xfs_open_by_handle(filp, &hreq);
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	}
	case XFS_IOC_READLINK_BY_HANDLE_32: {
		struct xfs_fsop_handlereq	hreq;

		if (xfs_compat_handlereq_copyin(&hreq, arg))
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			return -EFAULT;
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		return xfs_readlink_by_handle(filp, &hreq);
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	}
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	case XFS_IOC_ATTRLIST_BY_HANDLE_32:
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		return xfs_compat_attrlist_by_handle(filp, arg);
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	case XFS_IOC_ATTRMULTI_BY_HANDLE_32:
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		return xfs_compat_attrmulti_by_handle(filp, arg);
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	case XFS_IOC_FSSETDM_BY_HANDLE_32:
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		return xfs_compat_fssetdm_by_handle(filp, arg);
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	default:
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		return -ENOIOCTLCMD;
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	}
}