static int shell_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
{
p_shell_tty_call_arg call_arg = NULL;
printk(KERN_DEBUG "received shell ioctl cmd=0x%02x\n, arg=0x%02lx\n",cmd,arg);
switch (cmd)
{
case ES_TTY_IOCTL_SIGN:
return VALID_SIGN(tty);
case ES_TTY_IOCTL_CALL:
call_arg = (p_shell_tty_call_arg) arg;
if (call_arg->sign_word & ~VALID_SIGN(tty)) {
printk("Unallowed call\n");
return -EPERM;
}
return shell_call(call_arg->func_name,
call_arg->arg1,
call_arg->arg2,
call_arg->arg3,
call_arg->arg4,
call_arg->arg5,
call_arg->arg6);
default:
printk("shell_ioctl unknown cmd\n");
break;
}
return -ENOIOCTLCMD;
}
static int shell_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
{
p_shell_tty_call_arg call_arg = NULL;
shell_tty_call_arg temp_call_arg;
unsigned long len = 1024;
long ret;
switch (cmd)
{
case ES_TTY_IOCTL_SIGN:
return VALID_SIGN(tty);
case ES_TTY_IOCTL_CALL:
call_arg = (p_shell_tty_call_arg) arg;
if(copy_from_user((void *)&temp_call_arg, (void *)arg, sizeof(shell_tty_call_arg)))
{
return -EFAULT;
}
temp_call_arg.func_name = kmalloc(len, GFP_KERNEL);
if(temp_call_arg.func_name == NULL)
{
printk("%s: out of memory\n", __FUNCTION__);
return -ENOMEM;
}
ret = strncpy_from_user(temp_call_arg.func_name, call_arg->func_name, len);
if (ret >= len)
{
kfree(call_arg->func_name);
return -ENAMETOOLONG;
}
if (!ret)
{
kfree(call_arg->func_name);
return -ENOENT;
}
if (ret < 0)
{
kfree(call_arg->func_name);
return ret;
}
call_arg = &temp_call_arg;
if (call_arg->sign_word & ~VALID_SIGN(tty)) {
printk("Unallowed call\n");
kfree(call_arg->func_name);
return -EPERM;
}
ret = shell_call(call_arg->func_name,
call_arg->arg1,
call_arg->arg2,
call_arg->arg3,
call_arg->arg4,
call_arg->arg5,
call_arg->arg6);
kfree(call_arg->func_name);
return ret;
default:
printk("shell_ioctl unknown cmd 0x%x\n", cmd);
break;
}
return -ENOIOCTLCMD;
}
/**
* shell_compact_ioctl() - for 32bit aligned userspace ecall as the kernel is 64bit aligned
we make kernel struct the same aligned as userspace
* @tty: ecall tty struct
* @cmd: ecall command
* @arg: ecall parameter
* Return ecall command exec result.
*/
static long shell_compact_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
{
p_shell_tty_call_arg32 call_arg = NULL;
shell_tty_call_arg32 temp_call_arg;
char *func_name = NULL;
unsigned int user_func = 0;
unsigned long len = 1024;
long ret;
printk(KERN_DEBUG "received shell ioctl cmd=0x%02x\n, arg=0x%02lx\n",cmd,arg);
switch (cmd) {
case ES_TTY_IOCTL_SIGN:
return VALID_SIGN(tty);
case ES_TTY_IOCTL_CALL:
call_arg = (p_shell_tty_call_arg32) arg;
if(copy_from_user((void *)&temp_call_arg, (const void __user *)arg, sizeof(shell_tty_call_arg32)))
{
printk("%s: copy_from_user fail\n", __FUNCTION__);
return -EFAULT;
}
func_name = kmalloc(len, GFP_KERNEL);
if(func_name == NULL)
{
printk("%s: out of memory\n", __FUNCTION__);
return -ENOMEM;
}
user_func = temp_call_arg.func_name;
ret = strncpy_from_user(func_name, (char __user*)user_func, len);
if (ret >= len)
{
kfree(func_name);
printk("%s: strncpy_from_user fail, too long!\n", __FUNCTION__);
return -ENAMETOOLONG;
}
if (!ret)
{
kfree(func_name);
printk("%s: strncpy_from_user fail, no func_name!\n", __FUNCTION__);
return -ENOENT;
}
if (ret < 0)
{
kfree(func_name);
printk("%s: strncpy_from_user fail, can't copy!\n", __FUNCTION__);
return ret;
}
call_arg = &temp_call_arg;
if (call_arg->sign_word & ~VALID_SIGN(tty)) {
printk("Unallowed call\n");
kfree(func_name);
return -EPERM;
}
ret = shell_call(func_name,
call_arg->arg1,
call_arg->arg2,
call_arg->arg3,
call_arg->arg4,
call_arg->arg5,
call_arg->arg6);
kfree(func_name);
return ret;
default:
printk("shell_ioctl unknown cmd 0x%x\n", cmd);
break;
}
return -ENOIOCTLCMD;
}