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linux/fs/xfs/linux-2.6/xfs_ioctl32.c
Christoph Hellwig 62e194ecda xfs: use mnt_want_write in compat_attrmulti ioctl 
The compat version of the attrmulti ioctl needs to ask for and then
later release write access to the mount just like the native version,
otherwise we could potentially write to read-only mounts.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <david@fromorbit.com>
2009-01-19 14:44:30 +11:00

676 lines
18 KiB
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/*
* Copyright (c) 2004-2005 Silicon Graphics, Inc.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation.
*
* 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.
*
* 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
*/
#include <linux/compat.h>
#include <linux/ioctl.h>
#include <linux/mount.h>
#include <asm/uaccess.h>
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_bit.h"
#include "xfs_log.h"
#include "xfs_inum.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
#include "xfs_dir2.h"
#include "xfs_dmapi.h"
#include "xfs_mount.h"
#include "xfs_bmap_btree.h"
#include "xfs_attr_sf.h"
#include "xfs_dir2_sf.h"
#include "xfs_vnode.h"
#include "xfs_dinode.h"
#include "xfs_inode.h"
#include "xfs_itable.h"
#include "xfs_error.h"
#include "xfs_dfrag.h"
#include "xfs_vnodeops.h"
#include "xfs_fsops.h"
#include "xfs_alloc.h"
#include "xfs_rtalloc.h"
#include "xfs_attr.h"
#include "xfs_ioctl.h"
#include "xfs_ioctl32.h"
#define _NATIVE_IOC(cmd, type) \
_IOC(_IOC_DIR(cmd), _IOC_TYPE(cmd), _IOC_NR(cmd), sizeof(type))
#ifdef BROKEN_X86_ALIGNMENT
STATIC int
xfs_compat_flock64_copyin(
xfs_flock64_t *bf,
compat_xfs_flock64_t __user *arg32)
{
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)))
return -XFS_ERROR(EFAULT);
return 0;
}
STATIC int
xfs_compat_ioc_fsgeometry_v1(
struct xfs_mount *mp,
compat_xfs_fsop_geom_v1_t __user *arg32)
{
xfs_fsop_geom_t fsgeo;
int error;
error = xfs_fs_geometry(mp, &fsgeo, 3);
if (error)
return -error;
/* The 32-bit variant simply has some padding at the end */
if (copy_to_user(arg32, &fsgeo, sizeof(struct compat_xfs_fsop_geom_v1)))
return -XFS_ERROR(EFAULT);
return 0;
}
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))
return -XFS_ERROR(EFAULT);
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))
return -XFS_ERROR(EFAULT);
return 0;
}
STATIC int
xfs_inumbers_fmt_compat(
void __user *ubuffer,
const xfs_inogrp_t *buffer,
long count,
long *written)
{
compat_xfs_inogrp_t __user *p32 = ubuffer;
long i;
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))
return -XFS_ERROR(EFAULT);
}
*written = count * sizeof(*p32);
return 0;
}
#else
#define xfs_inumbers_fmt_compat xfs_inumbers_fmt
#endif /* BROKEN_X86_ALIGNMENT */
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))
return -XFS_ERROR(EFAULT);
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) ||
get_user(bstat->bs_projid, &bstat32->bs_projid) ||
get_user(bstat->bs_dmevmask, &bstat32->bs_dmevmask) ||
get_user(bstat->bs_dmstate, &bstat32->bs_dmstate) ||
get_user(bstat->bs_aextents, &bstat32->bs_aextents))
return -XFS_ERROR(EFAULT);
return 0;
}
/* XFS_IOC_FSBULKSTAT and friends */
STATIC int
xfs_bstime_store_compat(
compat_xfs_bstime_t __user *p32,
const xfs_bstime_t *p)
{
__s32 sec32;
sec32 = p->tv_sec;
if (put_user(sec32, &p32->tv_sec) ||
put_user(p->tv_nsec, &p32->tv_nsec))
return -XFS_ERROR(EFAULT);
return 0;
}
/* Return 0 on success or positive error (to xfs_bulkstat()) */
STATIC int
xfs_bulkstat_one_fmt_compat(
void __user *ubuffer,
int ubsize,
int *ubused,
const xfs_bstat_t *buffer)
{
compat_xfs_bstat_t __user *p32 = ubuffer;
if (ubsize < sizeof(*p32))
return XFS_ERROR(ENOMEM);
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) ||
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) ||
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) ||
put_user(buffer->bs_dmevmask, &p32->bs_dmevmask) ||
put_user(buffer->bs_dmstate, &p32->bs_dmstate) ||
put_user(buffer->bs_aextents, &p32->bs_aextents))
return XFS_ERROR(EFAULT);
if (ubused)
*ubused = sizeof(*p32);
return 0;
}
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 */
void *private_data, /* my private data */
xfs_daddr_t bno, /* starting bno of inode cluster */
int *ubused, /* bytes used by me */
void *dibuff, /* on-disk inode buffer */
int *stat) /* BULKSTAT_RV_... */
{
return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
xfs_bulkstat_one_fmt_compat, bno,
ubused, dibuff, stat);
}
/* copied from xfs_ioctl.c */
STATIC int
xfs_compat_ioc_bulkstat(
xfs_mount_t *mp,
unsigned int cmd,
compat_xfs_fsop_bulkreq_t __user *p32)
{
u32 addr;
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) */
if (!capable(CAP_SYS_ADMIN))
return -XFS_ERROR(EPERM);
if (XFS_FORCED_SHUTDOWN(mp))
return -XFS_ERROR(EIO);
if (get_user(addr, &p32->lastip))
return -XFS_ERROR(EFAULT);
bulkreq.lastip = compat_ptr(addr);
if (get_user(bulkreq.icount, &p32->icount) ||
get_user(addr, &p32->ubuffer))
return -XFS_ERROR(EFAULT);
bulkreq.ubuffer = compat_ptr(addr);
if (get_user(addr, &p32->ocount))
return -XFS_ERROR(EFAULT);
bulkreq.ocount = compat_ptr(addr);
if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
return -XFS_ERROR(EFAULT);
if ((count = bulkreq.icount) <= 0)
return -XFS_ERROR(EINVAL);
if (bulkreq.ubuffer == NULL)
return -XFS_ERROR(EINVAL);
if (cmd == XFS_IOC_FSINUMBERS_32) {
error = xfs_inumbers(mp, &inlast, &count,
bulkreq.ubuffer, xfs_inumbers_fmt_compat);
} else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE_32) {
int res;
error = xfs_bulkstat_one_compat(mp, inlast, bulkreq.ubuffer,
sizeof(compat_xfs_bstat_t),
NULL, 0, NULL, NULL, &res);
} else if (cmd == XFS_IOC_FSBULKSTAT_32) {
error = xfs_bulkstat(mp, &inlast, &count,
xfs_bulkstat_one_compat, NULL,
sizeof(compat_xfs_bstat_t), bulkreq.ubuffer,
BULKSTAT_FG_QUICK, &done);
} else
error = XFS_ERROR(EINVAL);
if (error)
return -error;
if (bulkreq.ocount != NULL) {
if (copy_to_user(bulkreq.lastip, &inlast,
sizeof(xfs_ino_t)))
return -XFS_ERROR(EFAULT);
if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
return -XFS_ERROR(EFAULT);
}
return 0;
}
STATIC int
xfs_compat_handlereq_copyin(
xfs_fsop_handlereq_t *hreq,
compat_xfs_fsop_handlereq_t __user *arg32)
{
compat_xfs_fsop_handlereq_t hreq32;
if (copy_from_user(&hreq32, arg32, sizeof(compat_xfs_fsop_handlereq_t)))
return -XFS_ERROR(EFAULT);
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;
}
STATIC struct dentry *
xfs_compat_handlereq_to_dentry(
struct file *parfilp,
compat_xfs_fsop_handlereq_t *hreq)
{
return xfs_handle_to_dentry(parfilp,
compat_ptr(hreq->ihandle), hreq->ihandlen);
}
STATIC int
xfs_compat_attrlist_by_handle(
struct file *parfilp,
void __user *arg)
{
int error;
attrlist_cursor_kern_t *cursor;
compat_xfs_fsop_attrlist_handlereq_t al_hreq;
struct dentry *dentry;
char *kbuf;
if (!capable(CAP_SYS_ADMIN))
return -XFS_ERROR(EPERM);
if (copy_from_user(&al_hreq, arg,
sizeof(compat_xfs_fsop_attrlist_handlereq_t)))
return -XFS_ERROR(EFAULT);
if (al_hreq.buflen > XATTR_LIST_MAX)
return -XFS_ERROR(EINVAL);
/*
* Reject flags, only allow namespaces.
*/
if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
return -XFS_ERROR(EINVAL);
dentry = xfs_compat_handlereq_to_dentry(parfilp, &al_hreq.hreq);
if (IS_ERR(dentry))
return PTR_ERR(dentry);
error = -ENOMEM;
kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL);
if (!kbuf)
goto out_dput;
cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen,
al_hreq.flags, cursor);
if (error)
goto out_kfree;
if (copy_to_user(compat_ptr(al_hreq.buffer), kbuf, al_hreq.buflen))
error = -EFAULT;
out_kfree:
kfree(kbuf);
out_dput:
dput(dentry);
return error;
}
STATIC int
xfs_compat_attrmulti_by_handle(
struct file *parfilp,
void __user *arg)
{
int error;
compat_xfs_attr_multiop_t *ops;
compat_xfs_fsop_attrmulti_handlereq_t am_hreq;
struct dentry *dentry;
unsigned int i, size;
char *attr_name;
if (!capable(CAP_SYS_ADMIN))
return -XFS_ERROR(EPERM);
if (copy_from_user(&am_hreq, arg,
sizeof(compat_xfs_fsop_attrmulti_handlereq_t)))
return -XFS_ERROR(EFAULT);
dentry = xfs_compat_handlereq_to_dentry(parfilp, &am_hreq.hreq);
if (IS_ERR(dentry))
return PTR_ERR(dentry);
error = E2BIG;
size = am_hreq.opcount * sizeof(compat_xfs_attr_multiop_t);
if (!size || size > 16 * PAGE_SIZE)
goto out_dput;
error = ENOMEM;
ops = kmalloc(size, GFP_KERNEL);
if (!ops)
goto out_dput;
error = EFAULT;
if (copy_from_user(ops, compat_ptr(am_hreq.ops), size))
goto out_kfree_ops;
attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL);
if (!attr_name)
goto out_kfree_ops;
error = 0;
for (i = 0; i < am_hreq.opcount; i++) {
ops[i].am_error = strncpy_from_user(attr_name,
compat_ptr(ops[i].am_attrname),
MAXNAMELEN);
if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN)
error = -ERANGE;
if (ops[i].am_error < 0)
break;
switch (ops[i].am_opcode) {
case ATTR_OP_GET:
ops[i].am_error = xfs_attrmulti_attr_get(
dentry->d_inode, attr_name,
compat_ptr(ops[i].am_attrvalue),
&ops[i].am_length, ops[i].am_flags);
break;
case ATTR_OP_SET:
ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
if (ops[i].am_error)
break;
ops[i].am_error = xfs_attrmulti_attr_set(
dentry->d_inode, attr_name,
compat_ptr(ops[i].am_attrvalue),
ops[i].am_length, ops[i].am_flags);
mnt_drop_write(parfilp->f_path.mnt);
break;
case ATTR_OP_REMOVE:
ops[i].am_error = mnt_want_write(parfilp->f_path.mnt);
if (ops[i].am_error)
break;
ops[i].am_error = xfs_attrmulti_attr_remove(
dentry->d_inode, attr_name,
ops[i].am_flags);
mnt_drop_write(parfilp->f_path.mnt);
break;
default:
ops[i].am_error = EINVAL;
}
}
if (copy_to_user(compat_ptr(am_hreq.ops), ops, size))
error = XFS_ERROR(EFAULT);
kfree(attr_name);
out_kfree_ops:
kfree(ops);
out_dput:
dput(dentry);
return -error;
}
STATIC int
xfs_compat_fssetdm_by_handle(
struct file *parfilp,
void __user *arg)
{
int error;
struct fsdmidata fsd;
compat_xfs_fsop_setdm_handlereq_t dmhreq;
struct dentry *dentry;
if (!capable(CAP_MKNOD))
return -XFS_ERROR(EPERM);
if (copy_from_user(&dmhreq, arg,
sizeof(compat_xfs_fsop_setdm_handlereq_t)))
return -XFS_ERROR(EFAULT);
dentry = xfs_compat_handlereq_to_dentry(parfilp, &dmhreq.hreq);
if (IS_ERR(dentry))
return PTR_ERR(dentry);
if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) {
error = -XFS_ERROR(EPERM);
goto out;
}
if (copy_from_user(&fsd, compat_ptr(dmhreq.data), sizeof(fsd))) {
error = -XFS_ERROR(EFAULT);
goto out;
}
error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask,
fsd.fsd_dmstate);
out:
dput(dentry);
return error;
}
long
xfs_file_compat_ioctl(
struct file *filp,
unsigned cmd,
unsigned long p)
{
struct inode *inode = filp->f_path.dentry->d_inode;
struct xfs_inode *ip = XFS_I(inode);
struct xfs_mount *mp = ip->i_mount;
void __user *arg = (void __user *)p;
int ioflags = 0;
int error;
if (filp->f_mode & FMODE_NOCMTIME)
ioflags |= IO_INVIS;
xfs_itrace_entry(ip);
switch (cmd) {
/* No size or alignment issues on any arch */
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:
return xfs_file_ioctl(filp, cmd, p);
#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:
return xfs_file_ioctl(filp, cmd, p);
#else
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:
case XFS_IOC_UNRESVSP64_32: {
struct xfs_flock64 bf;
if (xfs_compat_flock64_copyin(&bf, arg))
return -XFS_ERROR(EFAULT);
cmd = _NATIVE_IOC(cmd, struct xfs_flock64);
return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
}
case XFS_IOC_FSGEOMETRY_V1_32:
return xfs_compat_ioc_fsgeometry_v1(mp, arg);
case XFS_IOC_FSGROWFSDATA_32: {
struct xfs_growfs_data in;
if (xfs_compat_growfs_data_copyin(&in, arg))
return -XFS_ERROR(EFAULT);
error = xfs_growfs_data(mp, &in);
return -error;
}
case XFS_IOC_FSGROWFSRT_32: {
struct xfs_growfs_rt in;
if (xfs_compat_growfs_rt_copyin(&in, arg))
return -XFS_ERROR(EFAULT);
error = xfs_growfs_rt(mp, &in);
return -error;
}
#endif
/* 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);
return xfs_file_ioctl(filp, cmd, p);
case XFS_IOC_SWAPEXT: {
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))
return -XFS_ERROR(EFAULT);
error = xfs_swapext(&sxp);
return -error;
}
case XFS_IOC_FSBULKSTAT_32:
case XFS_IOC_FSBULKSTAT_SINGLE_32:
case XFS_IOC_FSINUMBERS_32:
return xfs_compat_ioc_bulkstat(mp, cmd, arg);
case XFS_IOC_FD_TO_HANDLE_32:
case XFS_IOC_PATH_TO_HANDLE_32:
case XFS_IOC_PATH_TO_FSHANDLE_32: {
struct xfs_fsop_handlereq hreq;
if (xfs_compat_handlereq_copyin(&hreq, arg))
return -XFS_ERROR(EFAULT);
cmd = _NATIVE_IOC(cmd, struct xfs_fsop_handlereq);
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))
return -XFS_ERROR(EFAULT);
return xfs_open_by_handle(filp, &hreq);
}
case XFS_IOC_READLINK_BY_HANDLE_32: {
struct xfs_fsop_handlereq hreq;
if (xfs_compat_handlereq_copyin(&hreq, arg))
return -XFS_ERROR(EFAULT);
return xfs_readlink_by_handle(filp, &hreq);
}
case XFS_IOC_ATTRLIST_BY_HANDLE_32:
return xfs_compat_attrlist_by_handle(filp, arg);
case XFS_IOC_ATTRMULTI_BY_HANDLE_32:
return xfs_compat_attrmulti_by_handle(filp, arg);
case XFS_IOC_FSSETDM_BY_HANDLE_32:
return xfs_compat_fssetdm_by_handle(filp, arg);
default:
return -XFS_ERROR(ENOIOCTLCMD);
}
}
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