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[XFS] Clean up some existing compat ioctl calls

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Create a new xfs_ioctl.h file which has prototypes for
ioctl helpers that may be called in compat mode.

Change several compat ioctl cases which are IOW to simply copy
in the userspace argument, then call the common ioctl helper.

This also fixes xfs_compat_ioc_fsgeometry_v1(), which had
it backwards before; it copied in an (empty) arg, then copied
out the native result, which probably corrupted userspace.  It
should be translating on the copyout.

Also, a bit of formatting cleanup for consistency, and conversion
of all error returns to use XFS_ERROR().

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
This commit is contained in:
sandeen@sandeen.net 2008-11-25 21:20:08 -06:00 committed by Lachlan McIlroy
parent ffae263a64
commit d5547f9fee
3 changed files with 169 additions and 89 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
fs/xfs/linux-2.6/xfs_ioctl.c
View File

@ -68,7 +68,7 @@
* XFS_IOC_PATH_TO_HANDLE
* returns full handle for a path
*/
STATIC int
int
xfs_find_handle(
unsigned int cmd,
xfs_fsop_handlereq_t *hreq)
@ -245,7 +245,7 @@ xfs_vget_fsop_handlereq(
return 0;
}
STATIC int
int
xfs_open_by_handle(
xfs_mount_t *mp,
xfs_fsop_handlereq_t *hreq,
@ -355,7 +355,7 @@ do_readlink(
}
STATIC int
int
xfs_readlink_by_handle(
xfs_mount_t *mp,
xfs_fsop_handlereq_t *hreq,
@ -651,7 +651,7 @@ xfs_attrmulti_by_handle(
return -error;
}
STATIC int
int
xfs_ioc_space(
struct xfs_inode *ip,
struct inode *inode,

47
fs/xfs/linux-2.6/xfs_ioctl.h Normal file
View File

@ -0,0 +1,47 @@
/*
* Copyright (c) 2008 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
*/
#ifndef __XFS_IOCTL_H__
#define __XFS_IOCTL_H__
extern int
xfs_ioc_space(
struct xfs_inode *ip,
struct inode *inode,
struct file *filp,
int ioflags,
unsigned int cmd,
xfs_flock64_t *bf);
extern int
xfs_find_handle(
unsigned int cmd,
xfs_fsop_handlereq_t *hreq);
extern int
xfs_open_by_handle(
xfs_mount_t *mp,
xfs_fsop_handlereq_t *hreq,
struct file *parfilp,
struct inode *parinode);
extern int
xfs_readlink_by_handle(
xfs_mount_t *mp,
xfs_fsop_handlereq_t *hreq,
struct inode *parinode);
#endif

203
fs/xfs/linux-2.6/xfs_ioctl32.c
View File

@ -43,55 +43,62 @@
#include "xfs_error.h"
#include "xfs_dfrag.h"
#include "xfs_vnodeops.h"
#include "xfs_fsops.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 unsigned long
xfs_ioctl32_flock(
unsigned long arg)
STATIC int
xfs_compat_flock64_copyin(
xfs_flock64_t *bf,
compat_xfs_flock64_t __user *arg32)
{
compat_xfs_flock64_t __user *p32 = (void __user *)arg;
xfs_flock64_t __user *p = compat_alloc_user_space(sizeof(*p));
if (copy_in_user(&p->l_type, &p32->l_type, sizeof(s16)) ||
copy_in_user(&p->l_whence, &p32->l_whence, sizeof(s16)) ||
copy_in_user(&p->l_start, &p32->l_start, sizeof(s64)) ||
copy_in_user(&p->l_len, &p32->l_len, sizeof(s64)) ||
copy_in_user(&p->l_sysid, &p32->l_sysid, sizeof(s32)) ||
copy_in_user(&p->l_pid, &p32->l_pid, sizeof(u32)) ||
copy_in_user(&p->l_pad, &p32->l_pad, 4*sizeof(u32)))
return -EFAULT;
return (unsigned long)p;
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 unsigned long xfs_ioctl32_geom_v1(unsigned long arg)
STATIC int
xfs_compat_ioc_fsgeometry_v1(
struct xfs_mount *mp,
compat_xfs_fsop_geom_v1_t __user *arg32)
{
compat_xfs_fsop_geom_v1_t __user *p32 = (void __user *)arg;
xfs_fsop_geom_v1_t __user *p = compat_alloc_user_space(sizeof(*p));
xfs_fsop_geom_t fsgeo;
int error;
if (copy_in_user(p, p32, sizeof(*p32)))
return -EFAULT;
return (unsigned long)p;
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_inumbers_fmt_compat(
void __user *ubuffer,
const xfs_inogrp_t *buffer,
long count,
long *written)
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;
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;
return -XFS_ERROR(EFAULT);
}
*written = count * sizeof(*p32);
return 0;
@ -103,24 +110,26 @@ STATIC int xfs_inumbers_fmt_compat(
/* XFS_IOC_FSBULKSTAT and friends */
STATIC int xfs_bstime_store_compat(
compat_xfs_bstime_t __user *p32,
const xfs_bstime_t *p)
STATIC int
xfs_bstime_store_compat(
compat_xfs_bstime_t __user *p32,
const xfs_bstime_t *p)
{
__s32 sec32;
__s32 sec32;
sec32 = p->tv_sec;
if (put_user(sec32, &p32->tv_sec) ||
put_user(p->tv_nsec, &p32->tv_nsec))
return -EFAULT;
return -XFS_ERROR(EFAULT);
return 0;
}
STATIC int xfs_bulkstat_one_fmt_compat(
STATIC int
xfs_bulkstat_one_fmt_compat(
void __user *ubuffer,
const xfs_bstat_t *buffer)
{
compat_xfs_bstat_t __user *p32 = ubuffer;
compat_xfs_bstat_t __user *p32 = ubuffer;
if (put_user(buffer->bs_ino, &p32->bs_ino) ||
put_user(buffer->bs_mode, &p32->bs_mode) ||
@ -142,7 +151,7 @@ STATIC int xfs_bulkstat_one_fmt_compat(
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;
return -XFS_ERROR(EFAULT);
return sizeof(*p32);
}
@ -165,20 +174,20 @@ xfs_ioc_bulkstat_compat(
/* should be called again (unused here, but used in dmapi) */
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
return -XFS_ERROR(EPERM);
if (XFS_FORCED_SHUTDOWN(mp))
return -XFS_ERROR(EIO);
if (get_user(addr, &p32->lastip))
return -EFAULT;
return -XFS_ERROR(EFAULT);
bulkreq.lastip = compat_ptr(addr);
if (get_user(bulkreq.icount, &p32->icount) ||
get_user(addr, &p32->ubuffer))
return -EFAULT;
return -XFS_ERROR(EFAULT);
bulkreq.ubuffer = compat_ptr(addr);
if (get_user(addr, &p32->ocount))
return -EFAULT;
return -XFS_ERROR(EFAULT);
bulkreq.ocount = compat_ptr(addr);
if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
@ -216,38 +225,40 @@ xfs_ioc_bulkstat_compat(
return 0;
}
STATIC unsigned long xfs_ioctl32_fshandle(unsigned long arg)
STATIC int
xfs_compat_handlereq_copyin(
xfs_fsop_handlereq_t *hreq,
compat_xfs_fsop_handlereq_t __user *arg32)
{
compat_xfs_fsop_handlereq_t __user *p32 = (void __user *)arg;
xfs_fsop_handlereq_t __user *p = compat_alloc_user_space(sizeof(*p));
u32 addr;
compat_xfs_fsop_handlereq_t hreq32;
if (copy_in_user(&p->fd, &p32->fd, sizeof(__u32)) ||
get_user(addr, &p32->path) ||
put_user(compat_ptr(addr), &p->path) ||
copy_in_user(&p->oflags, &p32->oflags, sizeof(__u32)) ||
get_user(addr, &p32->ihandle) ||
put_user(compat_ptr(addr), &p->ihandle) ||
copy_in_user(&p->ihandlen, &p32->ihandlen, sizeof(__u32)) ||
get_user(addr, &p32->ohandle) ||
put_user(compat_ptr(addr), &p->ohandle) ||
get_user(addr, &p32->ohandlen) ||
put_user(compat_ptr(addr), &p->ohandlen))
return -EFAULT;
if (copy_from_user(&hreq32, arg32, sizeof(compat_xfs_fsop_handlereq_t)))
return -XFS_ERROR(EFAULT);
return (unsigned long)p;
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 long
xfs_compat_ioctl(
int mode,
struct file *file,
xfs_inode_t *ip,
struct file *filp,
int ioflags,
unsigned cmd,
unsigned long arg)
void __user *arg)
{
struct inode *inode = file->f_path.dentry->d_inode;
struct inode *inode = filp->f_path.dentry->d_inode;
xfs_mount_t *mp = ip->i_mount;
int error;
xfs_itrace_entry(XFS_I(inode));
switch (cmd) {
case XFS_IOC_DIOINFO:
case XFS_IOC_FSGEOMETRY:
@ -290,14 +301,16 @@ xfs_compat_ioctl(
case XFS_IOC_RESVSP_32:
case XFS_IOC_UNRESVSP_32:
case XFS_IOC_RESVSP64_32:
case XFS_IOC_UNRESVSP64_32:
arg = xfs_ioctl32_flock(arg);
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);
break;
return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf);
}
case XFS_IOC_FSGEOMETRY_V1_32:
arg = xfs_ioctl32_geom_v1(arg);
cmd = _NATIVE_IOC(cmd, struct xfs_fsop_geom_v1);
break;
return xfs_compat_ioc_fsgeometry_v1(mp, arg);
#else /* These are handled fine if no alignment issues */
case XFS_IOC_ALLOCSP:
case XFS_IOC_FREESP:
@ -323,35 +336,55 @@ xfs_compat_ioctl(
cmd, (void __user*)arg);
case XFS_IOC_FD_TO_HANDLE_32:
case XFS_IOC_PATH_TO_HANDLE_32:
case XFS_IOC_PATH_TO_FSHANDLE_32:
case XFS_IOC_OPEN_BY_HANDLE_32:
case XFS_IOC_READLINK_BY_HANDLE_32:
arg = xfs_ioctl32_fshandle(arg);
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);
break;
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(mp, &hreq, filp, inode);
}
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(mp, &hreq, inode);
}
default:
return -ENOIOCTLCMD;
return -XFS_ERROR(ENOIOCTLCMD);
}
error = xfs_ioctl(XFS_I(inode), file, mode, cmd, (void __user *)arg);
xfs_iflags_set(XFS_I(inode), XFS_IMODIFIED);
error = xfs_ioctl(ip, filp, ioflags, cmd, arg);
return error;
}
long
xfs_file_compat_ioctl(
struct file *file,
unsigned cmd,
unsigned long arg)
struct file *filp,
unsigned int cmd,
unsigned long p)
{
return xfs_compat_ioctl(0, file, cmd, arg);
struct inode *inode = filp->f_path.dentry->d_inode;
return xfs_compat_ioctl(XFS_I(inode), filp, 0, cmd, (void __user *)p);
}
long
xfs_file_compat_invis_ioctl(
struct file *file,
unsigned cmd,
unsigned long arg)
struct file *filp,
unsigned int cmd,
unsigned long p)
{
return xfs_compat_ioctl(IO_INVIS, file, cmd, arg);
struct inode *inode = filp->f_path.dentry->d_inode;
return xfs_compat_ioctl(XFS_I(inode), filp, IO_INVIS, cmd,
(void __user *)p);
}