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Commit e0d0bf8a authored by Al Viro's avatar Al Viro
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comedi: move compat ioctl handling to native fops 

mechanical move
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 8f3d9f35
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Showing with 448 additions and 487 deletions
drivers/staging/comedi/Makefile
View file @ e0d0bf8a
......@@ -4,7 +4,6 @@ ccflags-$(CONFIG_COMEDI_DEBUG) := -DDEBUG
comedi-y := comedi_fops.o range.o drivers.o \
comedi_buf.o
comedi-$(CONFIG_PROC_FS) += proc.o
comedi-$(CONFIG_COMPAT) += comedi_compat32.o
obj-$(CONFIG_COMEDI_PCI_DRIVERS) += comedi_pci.o
obj-$(CONFIG_COMEDI_PCMCIA_DRIVERS) += comedi_pcmcia.o
......
drivers/staging/comedi/comedi_compat32.c deleted 100644 → 0
View file @ 8f3d9f35
// SPDX-License-Identifier: GPL-2.0+
/*
* 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>
*/
#include <linux/uaccess.h>
#include <linux/compat.h>
#include <linux/fs.h>
#include "comedi.h"
#include "comedi_compat32.h"
#define COMEDI32_CHANINFO _IOR(CIO, 3, struct comedi32_chaninfo_struct)
#define COMEDI32_RANGEINFO _IOR(CIO, 8, struct comedi32_rangeinfo_struct)
/*
* 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.
*/
#define COMEDI32_CMD _IOR(CIO, 9, struct comedi32_cmd_struct)
/*
* 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.
*/
#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)
struct comedi32_chaninfo_struct {
unsigned int subdev;
compat_uptr_t maxdata_list; /* 32-bit 'unsigned int *' */
compat_uptr_t flaglist; /* 32-bit 'unsigned int *' */
compat_uptr_t rangelist; /* 32-bit 'unsigned int *' */
unsigned int unused[4];
};
struct comedi32_rangeinfo_struct {
unsigned int range_type;
compat_uptr_t range_ptr; /* 32-bit 'void *' */
};
struct comedi32_cmd_struct {
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;
compat_uptr_t chanlist; /* 32-bit 'unsigned int *' */
unsigned int chanlist_len;
compat_uptr_t data; /* 32-bit 'short *' */
unsigned int data_len;
};
struct comedi32_insn_struct {
unsigned int insn;
unsigned int n;
compat_uptr_t data; /* 32-bit 'unsigned int *' */
unsigned int subdev;
unsigned int chanspec;
unsigned int unused[3];
};
struct comedi32_insnlist_struct {
unsigned int n_insns;
compat_uptr_t insns; /* 32-bit 'struct comedi_insn *' */
};
/* Handle translated ioctl. */
static int translated_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
if (file->f_op->unlocked_ioctl)
return file->f_op->unlocked_ioctl(file, cmd, arg);
return -ENOTTY;
}
/* Handle 32-bit COMEDI_CHANINFO ioctl. */
static int compat_chaninfo(struct file *file, unsigned long arg)
{
struct comedi_chaninfo __user *chaninfo;
struct comedi32_chaninfo_struct __user *chaninfo32;
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(chaninfo32, sizeof(*chaninfo32)) ||
!access_ok(chaninfo, sizeof(*chaninfo)))
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);
if (err)
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)
{
struct comedi_rangeinfo __user *rangeinfo;
struct comedi32_rangeinfo_struct __user *rangeinfo32;
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(rangeinfo32, sizeof(*rangeinfo32)) ||
!access_ok(rangeinfo, sizeof(*rangeinfo)))
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);
if (err)
return -EFAULT;
return translated_ioctl(file, COMEDI_RANGEINFO,
(unsigned long)rangeinfo);
}
/* Copy 32-bit cmd structure to native cmd structure. */
static int get_compat_cmd(struct comedi_cmd __user *cmd,
struct comedi32_cmd_struct __user *cmd32)
{
int err;
union {
unsigned int uint;
compat_uptr_t uptr;
} temp;
/* Copy cmd structure. */
if (!access_ok(cmd32, sizeof(*cmd32)) ||
!access_ok(cmd, sizeof(*cmd)))
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((unsigned int __force *)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. */
static int put_compat_cmd(struct comedi32_cmd_struct __user *cmd32,
struct comedi_cmd __user *cmd)
{
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.)
*/
if (!access_ok(cmd, sizeof(*cmd)) ||
!access_ok(cmd32, sizeof(*cmd32)))
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)
{
struct comedi_cmd __user *cmd;
struct comedi32_cmd_struct __user *cmd32;
int rc, err;
cmd32 = compat_ptr(arg);
cmd = compat_alloc_user_space(sizeof(*cmd));
rc = get_compat_cmd(cmd, cmd32);
if (rc)
return rc;
rc = translated_ioctl(file, COMEDI_CMD, (unsigned long)cmd);
if (rc == -EAGAIN) {
/* Special case: copy cmd back to user. */
err = put_compat_cmd(cmd32, cmd);
if (err)
rc = err;
}
return rc;
}
/* Handle 32-bit COMEDI_CMDTEST ioctl. */
static int compat_cmdtest(struct file *file, unsigned long arg)
{
struct comedi_cmd __user *cmd;
struct comedi32_cmd_struct __user *cmd32;
int rc, err;
cmd32 = compat_ptr(arg);
cmd = compat_alloc_user_space(sizeof(*cmd));
rc = get_compat_cmd(cmd, cmd32);
if (rc)
return rc;
rc = translated_ioctl(file, COMEDI_CMDTEST, (unsigned long)cmd);
if (rc < 0)
return rc;
err = put_compat_cmd(cmd32, cmd);
if (err)
rc = err;
return rc;
}
/* Copy 32-bit insn structure to native insn structure. */
static int get_compat_insn(struct comedi_insn __user *insn,
struct comedi32_insn_struct __user *insn32)
{
int err;
union {
unsigned int uint;
compat_uptr_t uptr;
} temp;
/* Copy insn structure. Ignore the unused members. */
err = 0;
if (!access_ok(insn32, sizeof(*insn32)) ||
!access_ok(insn, sizeof(*insn)))
return -EFAULT;
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 {
struct comedi_insnlist insnlist;
struct comedi_insn insn[1];
} __user *s;
struct comedi32_insnlist_struct __user *insnlist32;
struct comedi32_insn_struct __user *insn32;
compat_uptr_t uptr;
unsigned int n_insns, n;
int err, rc;
insnlist32 = compat_ptr(arg);
/* Get 32-bit insnlist structure. */
if (!access_ok(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);
if (err)
return -EFAULT;
/* Allocate user memory to copy insnlist and insns into. */
s = compat_alloc_user_space(offsetof(struct combined_insnlist,
insn[n_insns]));
/* Set native insnlist structure. */
if (!access_ok(&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);
if (err)
return -EFAULT;
/* Copy insn structures. */
for (n = 0; n < n_insns; n++) {
rc = get_compat_insn(&s->insn[n], &insn32[n]);
if (rc)
return rc;
}
return translated_ioctl(file, COMEDI_INSNLIST,
(unsigned long)&s->insnlist);
}
/* Handle 32-bit COMEDI_INSN ioctl. */
static int compat_insn(struct file *file, unsigned long arg)
{
struct comedi_insn __user *insn;
struct comedi32_insn_struct __user *insn32;
int rc;
insn32 = compat_ptr(arg);
insn = compat_alloc_user_space(sizeof(*insn));
rc = get_compat_insn(insn, insn32);
if (rc)
return rc;
return translated_ioctl(file, COMEDI_INSN, (unsigned long)insn);
}
/*
* compat_ioctl file operation.
*
* Returns -ENOIOCTLCMD for unrecognised ioctl codes.
*/
long comedi_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
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:
case COMEDI_SETRSUBD:
case COMEDI_SETWSUBD:
/* 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;
}
drivers/staging/comedi/comedi_compat32.h deleted 100644 → 0
View file @ 8f3d9f35
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* comedi/comedi_compat32.h
* 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>
*/
#ifndef _COMEDI_COMPAT32_H
#define _COMEDI_COMPAT32_H
#ifdef CONFIG_COMPAT
struct file;
long comedi_compat_ioctl(struct file *file, unsigned int cmd,
unsigned long arg);
#else /* CONFIG_COMPAT */
#define comedi_compat_ioctl NULL
#endif /* CONFIG_COMPAT */
#endif /* _COMEDI_COMPAT32_H */
drivers/staging/comedi/comedi_fops.c
View file @ e0d0bf8a
......@@ -4,13 +4,14 @@
* comedi kernel module
*
* COMEDI - Linux Control and Measurement Device Interface
* Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
* Copyright (C) 1997-2007 David A. Schleef <ds@schleef.org>
* compat ioctls:
* Author: Ian Abbott, MEV Ltd. <abbotti@mev.co.uk>
* Copyright (C) 2007 MEV Ltd. <http://www.mev.co.uk/>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include "comedi_compat32.h"
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/kernel.h>
......@@ -27,6 +28,7 @@
#include <linux/io.h>
#include <linux/uaccess.h>
#include <linux/compat.h>
#include "comedi_internal.h"
......@@ -2806,6 +2808,449 @@ static int comedi_close(struct inode *inode, struct file *file)
return 0;
}
#ifdef CONFIG_COMPAT
#define COMEDI32_CHANINFO _IOR(CIO, 3, struct comedi32_chaninfo_struct)
#define COMEDI32_RANGEINFO _IOR(CIO, 8, struct comedi32_rangeinfo_struct)
/*
* 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.
*/
#define COMEDI32_CMD _IOR(CIO, 9, struct comedi32_cmd_struct)
/*
* 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.
*/
#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)
struct comedi32_chaninfo_struct {
unsigned int subdev;
compat_uptr_t maxdata_list; /* 32-bit 'unsigned int *' */
compat_uptr_t flaglist; /* 32-bit 'unsigned int *' */
compat_uptr_t rangelist; /* 32-bit 'unsigned int *' */
unsigned int unused[4];
};
struct comedi32_rangeinfo_struct {
unsigned int range_type;
compat_uptr_t range_ptr; /* 32-bit 'void *' */
};
struct comedi32_cmd_struct {
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;
compat_uptr_t chanlist; /* 32-bit 'unsigned int *' */
unsigned int chanlist_len;
compat_uptr_t data; /* 32-bit 'short *' */
unsigned int data_len;
};
struct comedi32_insn_struct {
unsigned int insn;
unsigned int n;
compat_uptr_t data; /* 32-bit 'unsigned int *' */
unsigned int subdev;
unsigned int chanspec;
unsigned int unused[3];
};
struct comedi32_insnlist_struct {
unsigned int n_insns;
compat_uptr_t insns; /* 32-bit 'struct comedi_insn *' */
};
/* Handle translated ioctl. */
static int translated_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
if (file->f_op->unlocked_ioctl)
return file->f_op->unlocked_ioctl(file, cmd, arg);
return -ENOTTY;
}
/* Handle 32-bit COMEDI_CHANINFO ioctl. */
static int compat_chaninfo(struct file *file, unsigned long arg)
{
struct comedi_chaninfo __user *chaninfo;
struct comedi32_chaninfo_struct __user *chaninfo32;
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(chaninfo32, sizeof(*chaninfo32)) ||
!access_ok(chaninfo, sizeof(*chaninfo)))
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);
if (err)
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)
{
struct comedi_rangeinfo __user *rangeinfo;
struct comedi32_rangeinfo_struct __user *rangeinfo32;
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(rangeinfo32, sizeof(*rangeinfo32)) ||
!access_ok(rangeinfo, sizeof(*rangeinfo)))
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);
if (err)
return -EFAULT;
return translated_ioctl(file, COMEDI_RANGEINFO,
(unsigned long)rangeinfo);
}
/* Copy 32-bit cmd structure to native cmd structure. */
static int get_compat_cmd(struct comedi_cmd __user *cmd,
struct comedi32_cmd_struct __user *cmd32)
{
int err;
union {
unsigned int uint;
compat_uptr_t uptr;
} temp;
/* Copy cmd structure. */
if (!access_ok(cmd32, sizeof(*cmd32)) ||
!access_ok(cmd, sizeof(*cmd)))
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((unsigned int __force *)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. */
static int put_compat_cmd(struct comedi32_cmd_struct __user *cmd32,
struct comedi_cmd __user *cmd)
{
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.)
*/
if (!access_ok(cmd, sizeof(*cmd)) ||
!access_ok(cmd32, sizeof(*cmd32)))
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)
{
struct comedi_cmd __user *cmd;
struct comedi32_cmd_struct __user *cmd32;
int rc, err;
cmd32 = compat_ptr(arg);
cmd = compat_alloc_user_space(sizeof(*cmd));
rc = get_compat_cmd(cmd, cmd32);
if (rc)
return rc;
rc = translated_ioctl(file, COMEDI_CMD, (unsigned long)cmd);
if (rc == -EAGAIN) {
/* Special case: copy cmd back to user. */
err = put_compat_cmd(cmd32, cmd);
if (err)
rc = err;
}
return rc;
}
/* Handle 32-bit COMEDI_CMDTEST ioctl. */
static int compat_cmdtest(struct file *file, unsigned long arg)
{
struct comedi_cmd __user *cmd;
struct comedi32_cmd_struct __user *cmd32;
int rc, err;
cmd32 = compat_ptr(arg);
cmd = compat_alloc_user_space(sizeof(*cmd));
rc = get_compat_cmd(cmd, cmd32);
if (rc)
return rc;
rc = translated_ioctl(file, COMEDI_CMDTEST, (unsigned long)cmd);
if (rc < 0)
return rc;
err = put_compat_cmd(cmd32, cmd);
if (err)
rc = err;
return rc;
}
/* Copy 32-bit insn structure to native insn structure. */
static int get_compat_insn(struct comedi_insn __user *insn,
struct comedi32_insn_struct __user *insn32)
{
int err;
union {
unsigned int uint;
compat_uptr_t uptr;
} temp;
/* Copy insn structure. Ignore the unused members. */
err = 0;
if (!access_ok(insn32, sizeof(*insn32)) ||
!access_ok(insn, sizeof(*insn)))
return -EFAULT;
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 {
struct comedi_insnlist insnlist;
struct comedi_insn insn[1];
} __user *s;
struct comedi32_insnlist_struct __user *insnlist32;
struct comedi32_insn_struct __user *insn32;
compat_uptr_t uptr;
unsigned int n_insns, n;
int err, rc;
insnlist32 = compat_ptr(arg);
/* Get 32-bit insnlist structure. */
if (!access_ok(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);
if (err)
return -EFAULT;
/* Allocate user memory to copy insnlist and insns into. */
s = compat_alloc_user_space(offsetof(struct combined_insnlist,
insn[n_insns]));
/* Set native insnlist structure. */
if (!access_ok(&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);
if (err)
return -EFAULT;
/* Copy insn structures. */
for (n = 0; n < n_insns; n++) {
rc = get_compat_insn(&s->insn[n], &insn32[n]);
if (rc)
return rc;
}
return translated_ioctl(file, COMEDI_INSNLIST,
(unsigned long)&s->insnlist);
}
/* Handle 32-bit COMEDI_INSN ioctl. */
static int compat_insn(struct file *file, unsigned long arg)
{
struct comedi_insn __user *insn;
struct comedi32_insn_struct __user *insn32;
int rc;
insn32 = compat_ptr(arg);
insn = compat_alloc_user_space(sizeof(*insn));
rc = get_compat_insn(insn, insn32);
if (rc)
return rc;
return translated_ioctl(file, COMEDI_INSN, (unsigned long)insn);
}
/*
* compat_ioctl file operation.
*
* Returns -ENOIOCTLCMD for unrecognised ioctl codes.
*/
static long comedi_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
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:
case COMEDI_SETRSUBD:
case COMEDI_SETWSUBD:
/* 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;
}
#else
#define comedi_compat_ioctl NULL
#endif
static const struct file_operations comedi_fops = {
.owner = THIS_MODULE,
.unlocked_ioctl = comedi_unlocked_ioctl,
......
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