static int dn_node_address_strategy(ctl_table *table, int *name, int nlen,
void *oldval, size_t *oldlenp,
void *newval, size_t newlen,
void **context)
{
size_t len;
dn_address addr;
if (oldval && oldlenp) {
if (get_user(len, oldlenp))
return -EFAULT;
if (len) {
if (len != sizeof(unsigned short))
return -EINVAL;
if (put_user(decnet_address, (unsigned short *)oldval))
return -EFAULT;
}
}
if (newval && newlen) {
if (newlen != sizeof(unsigned short))
return -EINVAL;
if (get_user(addr, (unsigned short *)newval))
return -EFAULT;
dn_dev_devices_off();
decnet_address = addr;
dn_dev_devices_on();
}
return 0;
}
static int dn_node_address_strategy(ctl_table *table,
void __user *oldval, size_t __user *oldlenp,
void __user *newval, size_t newlen)
{
size_t len;
__le16 addr;
if (oldval && oldlenp) {
if (get_user(len, oldlenp))
return -EFAULT;
if (len) {
if (len != sizeof(unsigned short))
return -EINVAL;
if (put_user(decnet_address, (__le16 __user *)oldval))
return -EFAULT;
}
}
if (newval && newlen) {
if (newlen != sizeof(unsigned short))
return -EINVAL;
if (get_user(addr, (__le16 __user *)newval))
return -EFAULT;
dn_dev_devices_off();
decnet_address = addr;
dn_dev_devices_on();
}
return 0;
}
static int dn_node_address_handler(ctl_table *table, int write,
struct file *filp,
void __user *buffer,
size_t *lenp, loff_t *ppos)
{
char addr[DN_ASCBUF_LEN];
size_t len;
__le16 dnaddr;
if (!*lenp || (*ppos && !write)) {
*lenp = 0;
return 0;
}
if (write) {
int len = (*lenp < DN_ASCBUF_LEN) ? *lenp : (DN_ASCBUF_LEN-1);
if (copy_from_user(addr, buffer, len))
return -EFAULT;
addr[len] = 0;
strip_it(addr);
if (parse_addr(&dnaddr, addr))
return -EINVAL;
dn_dev_devices_off();
decnet_address = dnaddr;
dn_dev_devices_on();
*ppos += len;
return 0;
}
dn_addr2asc(dn_ntohs(decnet_address), addr);
len = strlen(addr);
addr[len++] = '\n';
if (len > *lenp) len = *lenp;
if (copy_to_user(buffer, addr, len))
return -EFAULT;
*lenp = len;
*ppos += len;
return 0;
}