/* 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(VERIFY_READ, rangeinfo32, sizeof(*rangeinfo32))
|| !access_ok(VERIFY_WRITE, 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);
}
/* 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(VERIFY_READ, chaninfo32, sizeof(*chaninfo32))
|| !access_ok(VERIFY_WRITE, 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);
}
/*
* 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;
}
/* 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);
}
/* 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;
cmd32 = compat_ptr(arg);
cmd = compat_alloc_user_space(sizeof(*cmd));
rc = get_compat_cmd(cmd, cmd32);
if (rc)
return rc;
return translated_ioctl(file, COMEDI_CMD, (unsigned long)cmd);
}
/* 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(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);
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(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);
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_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;
}
/* 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;
}
