2008-11-05 05:29:31 +01:00
|
|
|
/*
|
|
|
|
comedi/comedi_compat32.c
|
|
|
|
32-bit ioctl compatibility for 64-bit comedi kernel module.
|
|
|
|
|
|
|
|
Author: Ian Abbott, MEV Ltd. <abbotti@mev.co.uk>
|
|
|
|
Copyright (C) 2007 MEV Ltd. <http://www.mev.co.uk/>
|
|
|
|
|
|
|
|
COMEDI - Linux Control and Measurement Device Interface
|
|
|
|
Copyright (C) 1997-2007 David A. Schleef <ds@schleef.org>
|
|
|
|
|
|
|
|
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; either version 2 of the License, or
|
|
|
|
(at your option) any later version.
|
|
|
|
|
|
|
|
This program is distributed in the hope that it will 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 to the Free Software
|
|
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
#define __NO_VERSION__
|
|
|
|
#include "comedi.h"
|
|
|
|
#include <linux/smp_lock.h>
|
|
|
|
#include <asm/uaccess.h>
|
|
|
|
|
|
|
|
#include "comedi_compat32.h"
|
|
|
|
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
|
|
|
|
|
|
#ifndef HAVE_COMPAT_IOCTL
|
|
|
|
#include <linux/ioctl32.h> /* for (un)register_ioctl32_conversion */
|
|
|
|
#endif
|
|
|
|
|
2009-03-21 05:34:38 +01:00
|
|
|
#define COMEDI32_CHANINFO _IOR(CIO, 3, struct comedi32_chaninfo_struct)
|
|
|
|
#define COMEDI32_RANGEINFO _IOR(CIO, 8, struct comedi32_rangeinfo_struct)
|
2008-11-05 05:29:31 +01:00
|
|
|
/* N.B. COMEDI32_CMD and COMEDI_CMD ought to use _IOWR, not _IOR.
|
|
|
|
* It's too late to change it now, but it only affects the command number. */
|
2009-03-21 05:34:38 +01:00
|
|
|
#define COMEDI32_CMD _IOR(CIO, 9, struct comedi32_cmd_struct)
|
2008-11-05 05:29:31 +01:00
|
|
|
/* N.B. COMEDI32_CMDTEST and COMEDI_CMDTEST ought to use _IOWR, not _IOR.
|
|
|
|
* It's too late to change it now, but it only affects the command number. */
|
2009-03-21 05:34:38 +01:00
|
|
|
#define COMEDI32_CMDTEST _IOR(CIO, 10, struct comedi32_cmd_struct)
|
|
|
|
#define COMEDI32_INSNLIST _IOR(CIO, 11, struct comedi32_insnlist_struct)
|
|
|
|
#define COMEDI32_INSN _IOR(CIO, 12, struct comedi32_insn_struct)
|
2008-11-05 05:29:31 +01:00
|
|
|
|
2009-03-17 03:04:29 +01:00
|
|
|
struct comedi32_chaninfo_struct {
|
2008-11-05 05:29:31 +01:00
|
|
|
unsigned int subdev;
|
2009-03-17 03:05:02 +01:00
|
|
|
compat_uptr_t maxdata_list; /* 32-bit 'unsigned int *' */
|
2009-06-08 17:34:41 +02:00
|
|
|
compat_uptr_t flaglist; /* 32-bit 'unsigned int *' */
|
2008-11-05 05:29:31 +01:00
|
|
|
compat_uptr_t rangelist; /* 32-bit 'unsigned int *' */
|
|
|
|
unsigned int unused[4];
|
2009-03-17 03:04:29 +01:00
|
|
|
};
|
2008-11-05 05:29:31 +01:00
|
|
|
|
2009-03-17 03:04:29 +01:00
|
|
|
struct comedi32_rangeinfo_struct {
|
2008-11-05 05:29:31 +01:00
|
|
|
unsigned int range_type;
|
|
|
|
compat_uptr_t range_ptr; /* 32-bit 'void *' */
|
2009-03-17 03:04:29 +01:00
|
|
|
};
|
2008-11-05 05:29:31 +01:00
|
|
|
|
2009-03-17 03:04:29 +01:00
|
|
|
struct comedi32_cmd_struct {
|
2008-11-05 05:29:31 +01:00
|
|
|
unsigned int subdev;
|
|
|
|
unsigned int flags;
|
|
|
|
unsigned int start_src;
|
|
|
|
unsigned int start_arg;
|
|
|
|
unsigned int scan_begin_src;
|
|
|
|
unsigned int scan_begin_arg;
|
|
|
|
unsigned int convert_src;
|
|
|
|
unsigned int convert_arg;
|
|
|
|
unsigned int scan_end_src;
|
|
|
|
unsigned int scan_end_arg;
|
|
|
|
unsigned int stop_src;
|
|
|
|
unsigned int stop_arg;
|
2009-06-08 17:34:41 +02:00
|
|
|
compat_uptr_t chanlist; /* 32-bit 'unsigned int *' */
|
2008-11-05 05:29:31 +01:00
|
|
|
unsigned int chanlist_len;
|
2009-06-08 17:34:41 +02:00
|
|
|
compat_uptr_t data; /* 32-bit 'short *' */
|
2008-11-05 05:29:31 +01:00
|
|
|
unsigned int data_len;
|
2009-03-17 03:04:29 +01:00
|
|
|
};
|
2008-11-05 05:29:31 +01:00
|
|
|
|
2009-03-17 03:04:29 +01:00
|
|
|
struct comedi32_insn_struct {
|
2008-11-05 05:29:31 +01:00
|
|
|
unsigned int insn;
|
|
|
|
unsigned int n;
|
2009-06-08 17:34:41 +02:00
|
|
|
compat_uptr_t data; /* 32-bit 'unsigned int *' */
|
2008-11-05 05:29:31 +01:00
|
|
|
unsigned int subdev;
|
|
|
|
unsigned int chanspec;
|
|
|
|
unsigned int unused[3];
|
2009-03-17 03:04:29 +01:00
|
|
|
};
|
2008-11-05 05:29:31 +01:00
|
|
|
|
2009-03-17 03:04:29 +01:00
|
|
|
struct comedi32_insnlist_struct {
|
2008-11-05 05:29:31 +01:00
|
|
|
unsigned int n_insns;
|
2009-06-08 17:34:41 +02:00
|
|
|
compat_uptr_t insns; /* 32-bit 'struct comedi_insn *' */
|
2009-03-17 03:04:29 +01:00
|
|
|
};
|
2008-11-05 05:29:31 +01:00
|
|
|
|
|
|
|
/* Handle translated ioctl. */
|
|
|
|
static int translated_ioctl(struct file *file, unsigned int cmd,
|
2009-06-08 17:34:41 +02:00
|
|
|
unsigned long arg)
|
2008-11-05 05:29:31 +01:00
|
|
|
{
|
2009-03-17 03:04:23 +01:00
|
|
|
if (!file->f_op)
|
2008-11-05 05:29:31 +01:00
|
|
|
return -ENOTTY;
|
2009-03-17 03:04:23 +01:00
|
|
|
|
2008-11-05 05:29:31 +01:00
|
|
|
#ifdef HAVE_UNLOCKED_IOCTL
|
|
|
|
if (file->f_op->unlocked_ioctl) {
|
2009-06-08 17:34:41 +02:00
|
|
|
int rc = (int)(*file->f_op->unlocked_ioctl) (file, cmd, arg);
|
2009-03-17 03:04:23 +01:00
|
|
|
if (rc == -ENOIOCTLCMD)
|
2008-11-05 05:29:31 +01:00
|
|
|
rc = -ENOTTY;
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
if (file->f_op->ioctl) {
|
|
|
|
int rc;
|
|
|
|
lock_kernel();
|
2009-06-08 17:34:41 +02:00
|
|
|
rc = (*file->f_op->ioctl) (file->f_dentry->d_inode,
|
|
|
|
file, cmd, arg);
|
2008-11-05 05:29:31 +01:00
|
|
|
unlock_kernel();
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
return -ENOTTY;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Handle 32-bit COMEDI_CHANINFO ioctl. */
|
|
|
|
static int compat_chaninfo(struct file *file, unsigned long arg)
|
|
|
|
{
|
2009-03-21 05:34:38 +01:00
|
|
|
struct comedi_chaninfo __user *chaninfo;
|
2009-03-17 03:04:29 +01:00
|
|
|
struct comedi32_chaninfo_struct __user *chaninfo32;
|
2008-11-05 05:29:31 +01:00
|
|
|
int err;
|
|
|
|
union {
|
|
|
|
unsigned int uint;
|
|
|
|
compat_uptr_t uptr;
|
|
|
|
} temp;
|
|
|
|
|
|
|
|
chaninfo32 = compat_ptr(arg);
|
|
|
|
chaninfo = compat_alloc_user_space(sizeof(*chaninfo));
|
|
|
|
|
|
|
|
/* Copy chaninfo structure. Ignore unused members. */
|
|
|
|
if (!access_ok(VERIFY_READ, chaninfo32, sizeof(*chaninfo32))
|
2009-06-08 17:34:41 +02:00
|
|
|
|| !access_ok(VERIFY_WRITE, chaninfo, sizeof(*chaninfo))) {
|
2008-11-05 05:29:31 +01:00
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
err = 0;
|
|
|
|
err |= __get_user(temp.uint, &chaninfo32->subdev);
|
|
|
|
err |= __put_user(temp.uint, &chaninfo->subdev);
|
|
|
|
err |= __get_user(temp.uptr, &chaninfo32->maxdata_list);
|
|
|
|
err |= __put_user(compat_ptr(temp.uptr), &chaninfo->maxdata_list);
|
|
|
|
err |= __get_user(temp.uptr, &chaninfo32->flaglist);
|
|
|
|
err |= __put_user(compat_ptr(temp.uptr), &chaninfo->flaglist);
|
|
|
|
err |= __get_user(temp.uptr, &chaninfo32->rangelist);
|
|
|
|
err |= __put_user(compat_ptr(temp.uptr), &chaninfo->rangelist);
|
2009-03-17 03:04:23 +01:00
|
|
|
if (err)
|
2008-11-05 05:29:31 +01:00
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
return translated_ioctl(file, COMEDI_CHANINFO, (unsigned long)chaninfo);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Handle 32-bit COMEDI_RANGEINFO ioctl. */
|
|
|
|
static int compat_rangeinfo(struct file *file, unsigned long arg)
|
|
|
|
{
|
2009-03-17 03:06:26 +01:00
|
|
|
struct comedi_rangeinfo __user *rangeinfo;
|
2009-03-17 03:04:29 +01:00
|
|
|
struct comedi32_rangeinfo_struct __user *rangeinfo32;
|
2008-11-05 05:29:31 +01:00
|
|
|
int err;
|
|
|
|
union {
|
|
|
|
unsigned int uint;
|
|
|
|
compat_uptr_t uptr;
|
|
|
|
} temp;
|
|
|
|
|
|
|
|
rangeinfo32 = compat_ptr(arg);
|
|
|
|
rangeinfo = compat_alloc_user_space(sizeof(*rangeinfo));
|
|
|
|
|
|
|
|
/* Copy rangeinfo structure. */
|
|
|
|
if (!access_ok(VERIFY_READ, rangeinfo32, sizeof(*rangeinfo32))
|
2009-06-08 17:34:41 +02:00
|
|
|
|| !access_ok(VERIFY_WRITE, rangeinfo, sizeof(*rangeinfo))) {
|
2008-11-05 05:29:31 +01:00
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
err = 0;
|
|
|
|
err |= __get_user(temp.uint, &rangeinfo32->range_type);
|
|
|
|
err |= __put_user(temp.uint, &rangeinfo->range_type);
|
|
|
|
err |= __get_user(temp.uptr, &rangeinfo32->range_ptr);
|
|
|
|
err |= __put_user(compat_ptr(temp.uptr), &rangeinfo->range_ptr);
|
2009-03-17 03:04:23 +01:00
|
|
|
if (err)
|
2008-11-05 05:29:31 +01:00
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
return translated_ioctl(file, COMEDI_RANGEINFO,
|
2009-06-08 17:34:41 +02:00
|
|
|
(unsigned long)rangeinfo);
|
2008-11-05 05:29:31 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Copy 32-bit cmd structure to native cmd structure. */
|
2009-06-08 17:34:41 +02:00
|
|
|
static int get_compat_cmd(struct comedi_cmd __user * cmd,
|
|
|
|
struct comedi32_cmd_struct __user * cmd32)
|
2008-11-05 05:29:31 +01:00
|
|
|
{
|
|
|
|
int err;
|
|
|
|
union {
|
|
|
|
unsigned int uint;
|
|
|
|
compat_uptr_t uptr;
|
|
|
|
} temp;
|
|
|
|
|
|
|
|
/* Copy cmd structure. */
|
|
|
|
if (!access_ok(VERIFY_READ, cmd32, sizeof(*cmd32))
|
2009-06-08 17:34:41 +02:00
|
|
|
|| !access_ok(VERIFY_WRITE, cmd, sizeof(*cmd))) {
|
2008-11-05 05:29:31 +01:00
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
err = 0;
|
|
|
|
err |= __get_user(temp.uint, &cmd32->subdev);
|
|
|
|
err |= __put_user(temp.uint, &cmd->subdev);
|
|
|
|
err |= __get_user(temp.uint, &cmd32->flags);
|
|
|
|
err |= __put_user(temp.uint, &cmd->flags);
|
|
|
|
err |= __get_user(temp.uint, &cmd32->start_src);
|
|
|
|
err |= __put_user(temp.uint, &cmd->start_src);
|
|
|
|
err |= __get_user(temp.uint, &cmd32->start_arg);
|
|
|
|
err |= __put_user(temp.uint, &cmd->start_arg);
|
|
|
|
err |= __get_user(temp.uint, &cmd32->scan_begin_src);
|
|
|
|
err |= __put_user(temp.uint, &cmd->scan_begin_src);
|
|
|
|
err |= __get_user(temp.uint, &cmd32->scan_begin_arg);
|
|
|
|
err |= __put_user(temp.uint, &cmd->scan_begin_arg);
|
|
|
|
err |= __get_user(temp.uint, &cmd32->convert_src);
|
|
|
|
err |= __put_user(temp.uint, &cmd->convert_src);
|
|
|
|
err |= __get_user(temp.uint, &cmd32->convert_arg);
|
|
|
|
err |= __put_user(temp.uint, &cmd->convert_arg);
|
|
|
|
err |= __get_user(temp.uint, &cmd32->scan_end_src);
|
|
|
|
err |= __put_user(temp.uint, &cmd->scan_end_src);
|
|
|
|
err |= __get_user(temp.uint, &cmd32->scan_end_arg);
|
|
|
|
err |= __put_user(temp.uint, &cmd->scan_end_arg);
|
|
|
|
err |= __get_user(temp.uint, &cmd32->stop_src);
|
|
|
|
err |= __put_user(temp.uint, &cmd->stop_src);
|
|
|
|
err |= __get_user(temp.uint, &cmd32->stop_arg);
|
|
|
|
err |= __put_user(temp.uint, &cmd->stop_arg);
|
|
|
|
err |= __get_user(temp.uptr, &cmd32->chanlist);
|
|
|
|
err |= __put_user(compat_ptr(temp.uptr), &cmd->chanlist);
|
|
|
|
err |= __get_user(temp.uint, &cmd32->chanlist_len);
|
|
|
|
err |= __put_user(temp.uint, &cmd->chanlist_len);
|
|
|
|
err |= __get_user(temp.uptr, &cmd32->data);
|
|
|
|
err |= __put_user(compat_ptr(temp.uptr), &cmd->data);
|
|
|
|
err |= __get_user(temp.uint, &cmd32->data_len);
|
|
|
|
err |= __put_user(temp.uint, &cmd->data_len);
|
|
|
|
return err ? -EFAULT : 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Copy native cmd structure to 32-bit cmd structure. */
|
2009-06-08 17:34:41 +02:00
|
|
|
static int put_compat_cmd(struct comedi32_cmd_struct __user * cmd32,
|
|
|
|
struct comedi_cmd __user * cmd)
|
2008-11-05 05:29:31 +01:00
|
|
|
{
|
|
|
|
int err;
|
|
|
|
unsigned int temp;
|
|
|
|
|
|
|
|
/* Copy back most of cmd structure. */
|
|
|
|
/* Assume the pointer values are already valid. */
|
|
|
|
/* (Could use ptr_to_compat() to set them, but that wasn't implemented
|
|
|
|
* until kernel version 2.6.11.) */
|
|
|
|
if (!access_ok(VERIFY_READ, cmd, sizeof(*cmd))
|
2009-06-08 17:34:41 +02:00
|
|
|
|| !access_ok(VERIFY_WRITE, cmd32, sizeof(*cmd32))) {
|
2008-11-05 05:29:31 +01:00
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
err = 0;
|
|
|
|
err |= __get_user(temp, &cmd->subdev);
|
|
|
|
err |= __put_user(temp, &cmd32->subdev);
|
|
|
|
err |= __get_user(temp, &cmd->flags);
|
|
|
|
err |= __put_user(temp, &cmd32->flags);
|
|
|
|
err |= __get_user(temp, &cmd->start_src);
|
|
|
|
err |= __put_user(temp, &cmd32->start_src);
|
|
|
|
err |= __get_user(temp, &cmd->start_arg);
|
|
|
|
err |= __put_user(temp, &cmd32->start_arg);
|
|
|
|
err |= __get_user(temp, &cmd->scan_begin_src);
|
|
|
|
err |= __put_user(temp, &cmd32->scan_begin_src);
|
|
|
|
err |= __get_user(temp, &cmd->scan_begin_arg);
|
|
|
|
err |= __put_user(temp, &cmd32->scan_begin_arg);
|
|
|
|
err |= __get_user(temp, &cmd->convert_src);
|
|
|
|
err |= __put_user(temp, &cmd32->convert_src);
|
|
|
|
err |= __get_user(temp, &cmd->convert_arg);
|
|
|
|
err |= __put_user(temp, &cmd32->convert_arg);
|
|
|
|
err |= __get_user(temp, &cmd->scan_end_src);
|
|
|
|
err |= __put_user(temp, &cmd32->scan_end_src);
|
|
|
|
err |= __get_user(temp, &cmd->scan_end_arg);
|
|
|
|
err |= __put_user(temp, &cmd32->scan_end_arg);
|
|
|
|
err |= __get_user(temp, &cmd->stop_src);
|
|
|
|
err |= __put_user(temp, &cmd32->stop_src);
|
|
|
|
err |= __get_user(temp, &cmd->stop_arg);
|
|
|
|
err |= __put_user(temp, &cmd32->stop_arg);
|
|
|
|
/* Assume chanlist pointer is unchanged. */
|
|
|
|
err |= __get_user(temp, &cmd->chanlist_len);
|
|
|
|
err |= __put_user(temp, &cmd32->chanlist_len);
|
|
|
|
/* Assume data pointer is unchanged. */
|
|
|
|
err |= __get_user(temp, &cmd->data_len);
|
|
|
|
err |= __put_user(temp, &cmd32->data_len);
|
|
|
|
return err ? -EFAULT : 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Handle 32-bit COMEDI_CMD ioctl. */
|
|
|
|
static int compat_cmd(struct file *file, unsigned long arg)
|
|
|
|
{
|
2009-03-17 03:05:47 +01:00
|
|
|
struct comedi_cmd __user *cmd;
|
2009-03-17 03:04:29 +01:00
|
|
|
struct comedi32_cmd_struct __user *cmd32;
|
2008-11-05 05:29:31 +01:00
|
|
|
int rc;
|
|
|
|
|
|
|
|
cmd32 = compat_ptr(arg);
|
|
|
|
cmd = compat_alloc_user_space(sizeof(*cmd));
|
|
|
|
|
|
|
|
rc = get_compat_cmd(cmd, cmd32);
|
2009-03-17 03:04:23 +01:00
|
|
|
if (rc)
|
2008-11-05 05:29:31 +01:00
|
|
|
return rc;
|
|
|
|
|
|
|
|
return translated_ioctl(file, COMEDI_CMD, (unsigned long)cmd);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Handle 32-bit COMEDI_CMDTEST ioctl. */
|
|
|
|
static int compat_cmdtest(struct file *file, unsigned long arg)
|
|
|
|
{
|
2009-03-17 03:05:47 +01:00
|
|
|
struct comedi_cmd __user *cmd;
|
2009-03-17 03:04:29 +01:00
|
|
|
struct comedi32_cmd_struct __user *cmd32;
|
2008-11-05 05:29:31 +01:00
|
|
|
int rc, err;
|
|
|
|
|
|
|
|
cmd32 = compat_ptr(arg);
|
|
|
|
cmd = compat_alloc_user_space(sizeof(*cmd));
|
|
|
|
|
|
|
|
rc = get_compat_cmd(cmd, cmd32);
|
2009-03-17 03:04:23 +01:00
|
|
|
if (rc)
|
2008-11-05 05:29:31 +01:00
|
|
|
return rc;
|
|
|
|
|
|
|
|
rc = translated_ioctl(file, COMEDI_CMDTEST, (unsigned long)cmd);
|
2009-03-17 03:04:23 +01:00
|
|
|
if (rc < 0)
|
2008-11-05 05:29:31 +01:00
|
|
|
return rc;
|
|
|
|
|
|
|
|
err = put_compat_cmd(cmd32, cmd);
|
2009-03-17 03:04:23 +01:00
|
|
|
if (err)
|
2008-11-05 05:29:31 +01:00
|
|
|
rc = err;
|
2009-03-17 03:04:23 +01:00
|
|
|
|
2008-11-05 05:29:31 +01:00
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Copy 32-bit insn structure to native insn structure. */
|
2009-06-08 17:34:41 +02:00
|
|
|
static int get_compat_insn(struct comedi_insn __user * insn,
|
|
|
|
struct comedi32_insn_struct __user * insn32)
|
2008-11-05 05:29:31 +01:00
|
|
|
{
|
|
|
|
int err;
|
|
|
|
union {
|
|
|
|
unsigned int uint;
|
|
|
|
compat_uptr_t uptr;
|
|
|
|
} temp;
|
|
|
|
|
|
|
|
/* Copy insn structure. Ignore the unused members. */
|
|
|
|
err = 0;
|
|
|
|
if (!access_ok(VERIFY_READ, insn32, sizeof(*insn32))
|
2009-06-08 17:34:41 +02:00
|
|
|
|| !access_ok(VERIFY_WRITE, insn, sizeof(*insn)))
|
2008-11-05 05:29:31 +01:00
|
|
|
return -EFAULT;
|
2009-03-17 03:04:23 +01:00
|
|
|
|
2008-11-05 05:29:31 +01:00
|
|
|
err |= __get_user(temp.uint, &insn32->insn);
|
|
|
|
err |= __put_user(temp.uint, &insn->insn);
|
|
|
|
err |= __get_user(temp.uint, &insn32->n);
|
|
|
|
err |= __put_user(temp.uint, &insn->n);
|
|
|
|
err |= __get_user(temp.uptr, &insn32->data);
|
|
|
|
err |= __put_user(compat_ptr(temp.uptr), &insn->data);
|
|
|
|
err |= __get_user(temp.uint, &insn32->subdev);
|
|
|
|
err |= __put_user(temp.uint, &insn->subdev);
|
|
|
|
err |= __get_user(temp.uint, &insn32->chanspec);
|
|
|
|
err |= __put_user(temp.uint, &insn->chanspec);
|
|
|
|
return err ? -EFAULT : 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Handle 32-bit COMEDI_INSNLIST ioctl. */
|
|
|
|
static int compat_insnlist(struct file *file, unsigned long arg)
|
|
|
|
{
|
|
|
|
struct combined_insnlist {
|
2009-03-17 03:05:59 +01:00
|
|
|
struct comedi_insnlist insnlist;
|
2009-03-17 03:05:53 +01:00
|
|
|
struct comedi_insn insn[1];
|
2008-11-05 05:29:31 +01:00
|
|
|
} __user *s;
|
2009-03-17 03:04:29 +01:00
|
|
|
struct comedi32_insnlist_struct __user *insnlist32;
|
|
|
|
struct comedi32_insn_struct __user *insn32;
|
2008-11-05 05:29:31 +01:00
|
|
|
compat_uptr_t uptr;
|
|
|
|
unsigned int n_insns, n;
|
|
|
|
int err, rc;
|
|
|
|
|
|
|
|
insnlist32 = compat_ptr(arg);
|
|
|
|
|
|
|
|
/* Get 32-bit insnlist structure. */
|
|
|
|
if (!access_ok(VERIFY_READ, insnlist32, sizeof(*insnlist32))) {
|
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
err = 0;
|
|
|
|
err |= __get_user(n_insns, &insnlist32->n_insns);
|
|
|
|
err |= __get_user(uptr, &insnlist32->insns);
|
|
|
|
insn32 = compat_ptr(uptr);
|
2009-03-17 03:04:23 +01:00
|
|
|
if (err)
|
2008-11-05 05:29:31 +01:00
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
/* Allocate user memory to copy insnlist and insns into. */
|
|
|
|
s = compat_alloc_user_space(offsetof(struct combined_insnlist,
|
2009-06-08 17:34:41 +02:00
|
|
|
insn[n_insns]));
|
2008-11-05 05:29:31 +01:00
|
|
|
|
|
|
|
/* Set native insnlist structure. */
|
|
|
|
if (!access_ok(VERIFY_WRITE, &s->insnlist, sizeof(s->insnlist))) {
|
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
err |= __put_user(n_insns, &s->insnlist.n_insns);
|
|
|
|
err |= __put_user(&s->insn[0], &s->insnlist.insns);
|
2009-03-17 03:04:23 +01:00
|
|
|
if (err)
|
2008-11-05 05:29:31 +01:00
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
/* Copy insn structures. */
|
|
|
|
for (n = 0; n < n_insns; n++) {
|
|
|
|
rc = get_compat_insn(&s->insn[n], &insn32[n]);
|
2009-03-17 03:04:23 +01:00
|
|
|
if (rc)
|
2008-11-05 05:29:31 +01:00
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
return translated_ioctl(file, COMEDI_INSNLIST,
|
2009-06-08 17:34:41 +02:00
|
|
|
(unsigned long)&s->insnlist);
|
2008-11-05 05:29:31 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Handle 32-bit COMEDI_INSN ioctl. */
|
|
|
|
static int compat_insn(struct file *file, unsigned long arg)
|
|
|
|
{
|
2009-03-17 03:05:53 +01:00
|
|
|
struct comedi_insn __user *insn;
|
2009-03-17 03:04:29 +01:00
|
|
|
struct comedi32_insn_struct __user *insn32;
|
2008-11-05 05:29:31 +01:00
|
|
|
int rc;
|
|
|
|
|
|
|
|
insn32 = compat_ptr(arg);
|
|
|
|
insn = compat_alloc_user_space(sizeof(*insn));
|
|
|
|
|
|
|
|
rc = get_compat_insn(insn, insn32);
|
2009-03-17 03:04:23 +01:00
|
|
|
if (rc)
|
2008-11-05 05:29:31 +01:00
|
|
|
return rc;
|
|
|
|
|
|
|
|
return translated_ioctl(file, COMEDI_INSN, (unsigned long)insn);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Process untranslated ioctl. */
|
|
|
|
/* Returns -ENOIOCTLCMD for unrecognised ioctl codes. */
|
|
|
|
static inline int raw_ioctl(struct file *file, unsigned int cmd,
|
2009-06-08 17:34:41 +02:00
|
|
|
unsigned long arg)
|
2008-11-05 05:29:31 +01:00
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
switch (cmd) {
|
|
|
|
case COMEDI_DEVCONFIG:
|
|
|
|
case COMEDI_DEVINFO:
|
|
|
|
case COMEDI_SUBDINFO:
|
|
|
|
case COMEDI_BUFCONFIG:
|
|
|
|
case COMEDI_BUFINFO:
|
|
|
|
/* Just need to translate the pointer argument. */
|
|
|
|
arg = (unsigned long)compat_ptr(arg);
|
|
|
|
rc = translated_ioctl(file, cmd, arg);
|
|
|
|
break;
|
|
|
|
case COMEDI_LOCK:
|
|
|
|
case COMEDI_UNLOCK:
|
|
|
|
case COMEDI_CANCEL:
|
|
|
|
case COMEDI_POLL:
|
|
|
|
/* No translation needed. */
|
|
|
|
rc = translated_ioctl(file, cmd, arg);
|
|
|
|
break;
|
|
|
|
case COMEDI32_CHANINFO:
|
|
|
|
rc = compat_chaninfo(file, arg);
|
|
|
|
break;
|
|
|
|
case COMEDI32_RANGEINFO:
|
|
|
|
rc = compat_rangeinfo(file, arg);
|
|
|
|
break;
|
|
|
|
case COMEDI32_CMD:
|
|
|
|
rc = compat_cmd(file, arg);
|
|
|
|
break;
|
|
|
|
case COMEDI32_CMDTEST:
|
|
|
|
rc = compat_cmdtest(file, arg);
|
|
|
|
break;
|
|
|
|
case COMEDI32_INSNLIST:
|
|
|
|
rc = compat_insnlist(file, arg);
|
|
|
|
break;
|
|
|
|
case COMEDI32_INSN:
|
|
|
|
rc = compat_insn(file, arg);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
rc = -ENOIOCTLCMD;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef HAVE_COMPAT_IOCTL /* defined in <linux/fs.h> 2.6.11 onwards */
|
|
|
|
|
|
|
|
/* compat_ioctl file operation. */
|
|
|
|
/* Returns -ENOIOCTLCMD for unrecognised ioctl codes. */
|
2009-06-08 17:34:41 +02:00
|
|
|
long comedi_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
2008-11-05 05:29:31 +01:00
|
|
|
{
|
|
|
|
return raw_ioctl(file, cmd, arg);
|
|
|
|
}
|
|
|
|
|
|
|
|
#else /* HAVE_COMPAT_IOCTL */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Brain-dead ioctl compatibility for 2.6.10 and earlier.
|
|
|
|
*
|
|
|
|
* It's brain-dead because cmd numbers need to be unique system-wide!
|
|
|
|
* The comedi driver could end up attempting to execute ioctls for non-Comedi
|
|
|
|
* devices because it registered the system-wide cmd code first. Similarly,
|
|
|
|
* another driver could end up attempting to execute ioctls for a Comedi
|
|
|
|
* device because it registered the cmd code first. Chaos ensues.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/* Handler for all 32-bit ioctl codes registered by this driver. */
|
|
|
|
static int mapped_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg,
|
2009-06-08 17:34:41 +02:00
|
|
|
struct file *file)
|
2008-11-05 05:29:31 +01:00
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
/* Make sure we are dealing with a Comedi device. */
|
2009-03-17 03:04:23 +01:00
|
|
|
if (imajor(file->f_dentry->d_inode) != COMEDI_MAJOR)
|
2008-11-05 05:29:31 +01:00
|
|
|
return -ENOTTY;
|
2009-03-17 03:04:23 +01:00
|
|
|
|
2008-11-05 05:29:31 +01:00
|
|
|
rc = raw_ioctl(file, cmd, arg);
|
|
|
|
/* Do not return -ENOIOCTLCMD. */
|
2009-03-17 03:04:23 +01:00
|
|
|
if (rc == -ENOIOCTLCMD)
|
2008-11-05 05:29:31 +01:00
|
|
|
rc = -ENOTTY;
|
2009-03-17 03:04:23 +01:00
|
|
|
|
2008-11-05 05:29:31 +01:00
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
struct ioctl32_map {
|
|
|
|
unsigned int cmd;
|
2009-06-08 17:34:41 +02:00
|
|
|
int (*handler) (unsigned int, unsigned int, unsigned long,
|
2008-11-05 05:29:31 +01:00
|
|
|
struct file *);
|
|
|
|
int registered;
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct ioctl32_map comedi_ioctl32_map[] = {
|
2009-06-08 17:34:41 +02:00
|
|
|
{COMEDI_DEVCONFIG, mapped_ioctl, 0},
|
|
|
|
{COMEDI_DEVINFO, mapped_ioctl, 0},
|
|
|
|
{COMEDI_SUBDINFO, mapped_ioctl, 0},
|
|
|
|
{COMEDI_BUFCONFIG, mapped_ioctl, 0},
|
|
|
|
{COMEDI_BUFINFO, mapped_ioctl, 0},
|
|
|
|
{COMEDI_LOCK, mapped_ioctl, 0},
|
|
|
|
{COMEDI_UNLOCK, mapped_ioctl, 0},
|
|
|
|
{COMEDI_CANCEL, mapped_ioctl, 0},
|
|
|
|
{COMEDI_POLL, mapped_ioctl, 0},
|
|
|
|
{COMEDI32_CHANINFO, mapped_ioctl, 0},
|
|
|
|
{COMEDI32_RANGEINFO, mapped_ioctl, 0},
|
|
|
|
{COMEDI32_CMD, mapped_ioctl, 0},
|
|
|
|
{COMEDI32_CMDTEST, mapped_ioctl, 0},
|
|
|
|
{COMEDI32_INSNLIST, mapped_ioctl, 0},
|
|
|
|
{COMEDI32_INSN, mapped_ioctl, 0},
|
2008-11-05 05:29:31 +01:00
|
|
|
};
|
|
|
|
|
|
|
|
#define NUM_IOCTL32_MAPS ARRAY_SIZE(comedi_ioctl32_map)
|
|
|
|
|
|
|
|
/* Register system-wide 32-bit ioctl handlers. */
|
|
|
|
void comedi_register_ioctl32(void)
|
|
|
|
{
|
|
|
|
int n, rc;
|
|
|
|
|
|
|
|
for (n = 0; n < NUM_IOCTL32_MAPS; n++) {
|
|
|
|
rc = register_ioctl32_conversion(comedi_ioctl32_map[n].cmd,
|
2009-06-08 17:34:41 +02:00
|
|
|
comedi_ioctl32_map[n].handler);
|
2008-11-05 05:29:31 +01:00
|
|
|
if (rc) {
|
|
|
|
printk(KERN_WARNING
|
2009-06-08 17:34:41 +02:00
|
|
|
"comedi: failed to register 32-bit "
|
|
|
|
"compatible ioctl handler for 0x%X - "
|
|
|
|
"expect bad things to happen!\n",
|
|
|
|
comedi_ioctl32_map[n].cmd);
|
2008-11-05 05:29:31 +01:00
|
|
|
}
|
|
|
|
comedi_ioctl32_map[n].registered = !rc;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Unregister system-wide 32-bit ioctl translations. */
|
|
|
|
void comedi_unregister_ioctl32(void)
|
|
|
|
{
|
|
|
|
int n, rc;
|
|
|
|
|
|
|
|
for (n = 0; n < NUM_IOCTL32_MAPS; n++) {
|
|
|
|
if (comedi_ioctl32_map[n].registered) {
|
2009-06-08 17:34:41 +02:00
|
|
|
rc = unregister_ioctl32_conversion(comedi_ioctl32_map
|
|
|
|
[n].cmd,
|
|
|
|
comedi_ioctl32_map
|
|
|
|
[n].handler);
|
2008-11-05 05:29:31 +01:00
|
|
|
if (rc) {
|
|
|
|
printk(KERN_ERR
|
2009-06-08 17:34:41 +02:00
|
|
|
"comedi: failed to unregister 32-bit "
|
|
|
|
"compatible ioctl handler for 0x%X - "
|
|
|
|
"expect kernel Oops!\n",
|
|
|
|
comedi_ioctl32_map[n].cmd);
|
2008-11-05 05:29:31 +01:00
|
|
|
} else {
|
|
|
|
comedi_ioctl32_map[n].registered = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-06-08 17:34:41 +02:00
|
|
|
#endif /* HAVE_COMPAT_IOCTL */
|
2008-11-05 05:29:31 +01:00
|
|
|
|
2009-06-08 17:34:41 +02:00
|
|
|
#endif /* CONFIG_COMPAT */
|