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; }
static int dn_def_dev_handler(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { size_t len; struct net_device *dev; char devname[17]; if (!*lenp || (*ppos && !write)) { *lenp = 0; return 0; } if (write) { if (*lenp > 16) return -E2BIG; if (copy_from_user(devname, buffer, *lenp)) return -EFAULT; devname[*lenp] = 0; strip_it(devname); dev = dev_get_by_name(&init_net, devname); if (dev == NULL) return -ENODEV; if (dev->dn_ptr == NULL) { dev_put(dev); return -ENODEV; } if (dn_dev_set_default(dev, 1)) { dev_put(dev); return -ENODEV; } *ppos += *lenp; return 0; } dev = dn_dev_get_default(); if (dev == NULL) { *lenp = 0; return 0; } strcpy(devname, dev->name); dev_put(dev); len = strlen(devname); devname[len++] = '\n'; if (len > *lenp) len = *lenp; if (copy_to_user(buffer, devname, len)) return -EFAULT; *lenp = len; *ppos += len; return 0; }