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linux/fs/xfs/xfs_ioctl32.c
Nick Bowler a9d25bde1e xfs: Fix x32 ioctls when cmd numbers differ from ia32. 
Several ioctl structs change size between native 32-bit (ia32) and x32
applications, because x32 follows the native 64-bit (amd64) integer
alignment rules and uses 64-bit time_t.  In these instances, the ioctl
number changes so userspace simply gets -ENOTTY.  This scenario can be
handled by simply adding more cases.

Looking at the different ioctls implemented here:

- All the ones marked 'No size or alignment issue on any arch' should
  presumably all be fine.

- All the ones under BROKEN_X86_ALIGNMENT are different under integer
  alignment rules.  Since x32 matches amd64 here, we just need both
  sets of cases handled.

- XFS_IOC_SWAPEXT has both integer alignment differences and time_t
  differences.  Since x32 matches amd64 here, we need to add a case
  which calls the native implementation.

- The remaining ioctls have neither 64-bit integers nor time_t, so
  x32 matches ia32 here and no change is required at this level.  The
  bulkstat ioctl implementations have some pointer chasing which is
  handled separately.

Signed-off-by: Nick Bowler <nbowler@draconx.ca>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-12-18 10:55:21 -08:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2004-2005 Silicon Graphics, Inc.
* All Rights Reserved.
*/
#include <linux/compat.h>
#include <linux/ioctl.h>
#include <linux/mount.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/fsmap.h>
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_inode.h"
#include "xfs_itable.h"
#include "xfs_error.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"
#include "xfs_trace.h"
#include "xfs_sb.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 -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->m_sb, &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 -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 -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 -EFAULT;
return 0;
}
STATIC int
xfs_inumbers_fmt_compat(
void __user *ubuffer,
const struct xfs_inogrp *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 -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 -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_lo, &bstat32->bs_projid_lo) ||
get_user(bstat->bs_projid_hi, &bstat32->bs_projid_hi) ||
get_user(bstat->bs_forkoff, &bstat32->bs_forkoff) ||
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 -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 -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 -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_projid_hi, &p32->bs_projid_hi) ||
put_user(buffer->bs_forkoff, &p32->bs_forkoff) ||
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 -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 */
int *ubused, /* bytes used by me */
int *stat) /* BULKSTAT_RV_... */
{
return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
xfs_bulkstat_one_fmt_compat,
ubused, 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;
/*
* Output structure handling functions. Depending on the command,
* either the xfs_bstat and xfs_inogrp structures are written out
* to userpace memory via bulkreq.ubuffer. Normally the compat
* functions and structure size are the correct ones to use ...
*/
inumbers_fmt_pf inumbers_func = xfs_inumbers_fmt_compat;
bulkstat_one_pf bs_one_func = xfs_bulkstat_one_compat;
size_t bs_one_size = sizeof(struct compat_xfs_bstat);
#ifdef CONFIG_X86_X32
if (in_x32_syscall()) {
/*
* ... but on x32 the input xfs_fsop_bulkreq has pointers
* which must be handled in the "compat" (32-bit) way, while
* the xfs_bstat and xfs_inogrp structures follow native 64-
* bit layout convention. So adjust accordingly, otherwise
* the data written out in compat layout will not match what
* x32 userspace expects.
*/
inumbers_func = xfs_inumbers_fmt;
bs_one_func = xfs_bulkstat_one;
bs_one_size = sizeof(struct xfs_bstat);
}
#endif
/* 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 -EPERM;
if (XFS_FORCED_SHUTDOWN(mp))
return -EIO;
if (get_user(addr, &p32->lastip))
return -EFAULT;
bulkreq.lastip = compat_ptr(addr);
if (get_user(bulkreq.icount, &p32->icount) ||
get_user(addr, &p32->ubuffer))
return -EFAULT;
bulkreq.ubuffer = compat_ptr(addr);
if (get_user(addr, &p32->ocount))
return -EFAULT;
bulkreq.ocount = compat_ptr(addr);
if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
return -EFAULT;
if ((count = bulkreq.icount) <= 0)
return -EINVAL;
if (bulkreq.ubuffer == NULL)
return -EINVAL;
if (cmd == XFS_IOC_FSINUMBERS_32) {
error = xfs_inumbers(mp, &inlast, &count,
bulkreq.ubuffer, inumbers_func);
} else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE_32) {
int res;
error = bs_one_func(mp, inlast, bulkreq.ubuffer,
bs_one_size, NULL, &res);
} else if (cmd == XFS_IOC_FSBULKSTAT_32) {
error = xfs_bulkstat(mp, &inlast, &count,
bs_one_func, bs_one_size,
bulkreq.ubuffer, &done);
} else
error = -EINVAL;
if (error)
return error;
if (bulkreq.ocount != NULL) {
if (copy_to_user(bulkreq.lastip, &inlast,
sizeof(xfs_ino_t)))
return -EFAULT;
if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
return -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 -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 __user *p = arg;
compat_xfs_fsop_attrlist_handlereq_t al_hreq;
struct dentry *dentry;
char *kbuf;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (copy_from_user(&al_hreq, arg,
sizeof(compat_xfs_fsop_attrlist_handlereq_t)))
return -EFAULT;
if (al_hreq.buflen < sizeof(struct attrlist) ||
al_hreq.buflen > XFS_XATTR_LIST_MAX)
return -EINVAL;
/*
* Reject flags, only allow namespaces.
*/
if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE))
return -EINVAL;
dentry = xfs_compat_handlereq_to_dentry(parfilp, &al_hreq.hreq);
if (IS_ERR(dentry))
return PTR_ERR(dentry);
error = -ENOMEM;
kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP);
if (!kbuf)
goto out_dput;
cursor = (attrlist_cursor_kern_t *)&al_hreq.pos;
error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen,
al_hreq.flags, cursor);
if (error)
goto out_kfree;
if (copy_to_user(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
error = -EFAULT;
goto out_kfree;
}
if (copy_to_user(compat_ptr(al_hreq.buffer), kbuf, al_hreq.buflen))
error = -EFAULT;
out_kfree:
kmem_free(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;
unsigned char *attr_name;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (copy_from_user(&am_hreq, arg,
sizeof(compat_xfs_fsop_attrmulti_handlereq_t)))
return -EFAULT;
/* overflow check */
if (am_hreq.opcount >= INT_MAX / sizeof(compat_xfs_attr_multiop_t))
return -E2BIG;
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;
ops = memdup_user(compat_ptr(am_hreq.ops), size);
if (IS_ERR(ops)) {
error = PTR_ERR(ops);
goto out_dput;
}
error = -ENOMEM;
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((char *)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(
d_inode(dentry), 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_file(parfilp);
if (ops[i].am_error)
break;
ops[i].am_error = xfs_attrmulti_attr_set(
d_inode(dentry), attr_name,
compat_ptr(ops[i].am_attrvalue),
ops[i].am_length, ops[i].am_flags);
mnt_drop_write_file(parfilp);
break;
case ATTR_OP_REMOVE:
ops[i].am_error = mnt_want_write_file(parfilp);
if (ops[i].am_error)
break;
ops[i].am_error = xfs_attrmulti_attr_remove(
d_inode(dentry), attr_name,
ops[i].am_flags);
mnt_drop_write_file(parfilp);
break;
default:
ops[i].am_error = -EINVAL;
}
}
if (copy_to_user(compat_ptr(am_hreq.ops), ops, size))
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 -EPERM;
if (copy_from_user(&dmhreq, arg,
sizeof(compat_xfs_fsop_setdm_handlereq_t)))
return -EFAULT;
dentry = xfs_compat_handlereq_to_dentry(parfilp, &dmhreq.hreq);
if (IS_ERR(dentry))
return PTR_ERR(dentry);
if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) {
error = -EPERM;
goto out;
}
if (copy_from_user(&fsd, compat_ptr(dmhreq.data), sizeof(fsd))) {
error = -EFAULT;
goto out;
}
error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), 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 = file_inode(filp);
struct xfs_inode *ip = XFS_I(inode);
struct xfs_mount *mp = ip->i_mount;
void __user *arg = (void __user *)p;
int error;
trace_xfs_file_compat_ioctl(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:
case FS_IOC_GETFSMAP:
case XFS_IOC_SCRUB_METADATA:
return xfs_file_ioctl(filp, cmd, p);
#if !defined(BROKEN_X86_ALIGNMENT) || defined(CONFIG_X86_X32)
/*
* These are handled fine if no alignment issues. To support x32
* which uses native 64-bit alignment we must emit these cases in
* addition to the ia-32 compat set below.
*/
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:
case XFS_IOC_ZERO_RANGE:
#ifdef CONFIG_X86_X32
/*
* x32 special: this gets a different cmd number from the ia-32 compat
* case below; the associated data will match native 64-bit alignment.
*/
case XFS_IOC_SWAPEXT:
#endif
return xfs_file_ioctl(filp, cmd, p);
#endif
#if defined(BROKEN_X86_ALIGNMENT)
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:
case XFS_IOC_ZERO_RANGE_32: {
struct xfs_flock64 bf;
if (xfs_compat_flock64_copyin(&bf, arg))
return -EFAULT;
cmd = _NATIVE_IOC(cmd, struct xfs_flock64);
return xfs_ioc_space(filp, 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 -EFAULT;
error = mnt_want_write_file(filp);
if (error)
return error;
error = xfs_growfs_data(mp, &in);
mnt_drop_write_file(filp);
return error;
}
case XFS_IOC_FSGROWFSRT_32: {
struct xfs_growfs_rt in;
if (xfs_compat_growfs_rt_copyin(&in, arg))
return -EFAULT;
error = mnt_want_write_file(filp);
if (error)
return error;
error = xfs_growfs_rt(mp, &in);
mnt_drop_write_file(filp);
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_32: {
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 -EFAULT;
error = mnt_want_write_file(filp);
if (error)
return error;
error = xfs_ioc_swapext(&sxp);
mnt_drop_write_file(filp);
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 -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 -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 -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 -ENOIOCTLCMD;
}
}
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