static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) { struct ifinfomsg *ifm; struct net_device *dev; int err, send_addr_notify = 0, modified = 0; struct nlattr *tb[IFLA_MAX+1]; char ifname[IFNAMSIZ]; err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); if (err < 0) goto errout; if (tb[IFLA_IFNAME]) nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); else ifname[0] = '\0'; err = -EINVAL; ifm = nlmsg_data(nlh); if (ifm->ifi_index >= 0) dev = dev_get_by_index(ifm->ifi_index); else if (tb[IFLA_IFNAME]) dev = dev_get_by_name(ifname); else goto errout; if (dev == NULL) { err = -ENODEV; goto errout; } if (tb[IFLA_ADDRESS] && nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) goto errout_dev; if (tb[IFLA_BROADCAST] && nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) goto errout_dev; if (tb[IFLA_MAP]) { struct rtnl_link_ifmap *u_map; struct ifmap k_map; if (!dev->set_config) { err = -EOPNOTSUPP; goto errout_dev; } if (!netif_device_present(dev)) { err = -ENODEV; goto errout_dev; } u_map = nla_data(tb[IFLA_MAP]); k_map.mem_start = (unsigned long) u_map->mem_start; k_map.mem_end = (unsigned long) u_map->mem_end; k_map.base_addr = (unsigned short) u_map->base_addr; k_map.irq = (unsigned char) u_map->irq; k_map.dma = (unsigned char) u_map->dma; k_map.port = (unsigned char) u_map->port; err = dev->set_config(dev, &k_map); if (err < 0) goto errout_dev; modified = 1; } if (tb[IFLA_ADDRESS]) { struct sockaddr *sa; int len; if (!dev->set_mac_address) { err = -EOPNOTSUPP; goto errout_dev; } if (!netif_device_present(dev)) { err = -ENODEV; goto errout_dev; } len = sizeof(sa_family_t) + dev->addr_len; sa = kmalloc(len, GFP_KERNEL); if (!sa) { err = -ENOMEM; goto errout_dev; } sa->sa_family = dev->type; memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), dev->addr_len); err = dev->set_mac_address(dev, sa); kfree(sa); if (err) goto errout_dev; send_addr_notify = 1; modified = 1; } if (tb[IFLA_MTU]) { err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); if (err < 0) goto errout_dev; modified = 1; } /* * Interface selected by interface index but interface * name provided implies that a name change has been * requested. */ if (ifm->ifi_index >= 0 && ifname[0]) { err = dev_change_name(dev, ifname); if (err < 0) goto errout_dev; modified = 1; } #ifdef CONFIG_NET_WIRELESS_RTNETLINK if (tb[IFLA_WIRELESS]) { /* Call Wireless Extensions. * Various stuff checked in there... */ err = wireless_rtnetlink_set(dev, nla_data(tb[IFLA_WIRELESS]), nla_len(tb[IFLA_WIRELESS])); if (err < 0) goto errout_dev; } #endif /* CONFIG_NET_WIRELESS_RTNETLINK */ if (tb[IFLA_BROADCAST]) { nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); send_addr_notify = 1; } if (ifm->ifi_flags) dev_change_flags(dev, ifm->ifi_flags); if (tb[IFLA_TXQLEN]) dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); if (tb[IFLA_WEIGHT]) dev->weight = nla_get_u32(tb[IFLA_WEIGHT]); if (tb[IFLA_OPERSTATE]) set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); if (tb[IFLA_LINKMODE]) { write_lock_bh(&dev_base_lock); dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); write_unlock_bh(&dev_base_lock); } err = 0; errout_dev: if (err < 0 && modified && net_ratelimit()) printk(KERN_WARNING "A link change request failed with " "some changes comitted already. Interface %s may " "have been left with an inconsistent configuration, " "please check.\n", dev->name); if (send_addr_notify) call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); dev_put(dev); errout: return err; }
static int do_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) { struct ifinfomsg *ifm = NLMSG_DATA(nlh); struct rtattr **ida = arg; struct net_device *dev; int err, send_addr_notify = 0; if (ifm->ifi_index >= 0) dev = dev_get_by_index(ifm->ifi_index); else if (ida[IFLA_IFNAME - 1]) { char ifname[IFNAMSIZ]; if (rtattr_strlcpy(ifname, ida[IFLA_IFNAME - 1], IFNAMSIZ) >= IFNAMSIZ) return -EINVAL; dev = dev_get_by_name(ifname); } else return -EINVAL; if (!dev) return -ENODEV; err = -EINVAL; if (ifm->ifi_flags) dev_change_flags(dev, ifm->ifi_flags); if (ida[IFLA_MAP - 1]) { struct rtnl_link_ifmap *u_map; struct ifmap k_map; if (!dev->set_config) { err = -EOPNOTSUPP; goto out; } if (!netif_device_present(dev)) { err = -ENODEV; goto out; } if (ida[IFLA_MAP - 1]->rta_len != RTA_LENGTH(sizeof(*u_map))) goto out; u_map = RTA_DATA(ida[IFLA_MAP - 1]); k_map.mem_start = (unsigned long) u_map->mem_start; k_map.mem_end = (unsigned long) u_map->mem_end; k_map.base_addr = (unsigned short) u_map->base_addr; k_map.irq = (unsigned char) u_map->irq; k_map.dma = (unsigned char) u_map->dma; k_map.port = (unsigned char) u_map->port; err = dev->set_config(dev, &k_map); if (err) goto out; } if (ida[IFLA_ADDRESS - 1]) { struct sockaddr *sa; int len; if (!dev->set_mac_address) { err = -EOPNOTSUPP; goto out; } if (!netif_device_present(dev)) { err = -ENODEV; goto out; } if (ida[IFLA_ADDRESS - 1]->rta_len != RTA_LENGTH(dev->addr_len)) goto out; len = sizeof(sa_family_t) + dev->addr_len; sa = kmalloc(len, GFP_KERNEL); if (!sa) { err = -ENOMEM; goto out; } sa->sa_family = dev->type; memcpy(sa->sa_data, RTA_DATA(ida[IFLA_ADDRESS - 1]), dev->addr_len); err = dev->set_mac_address(dev, sa); kfree(sa); if (err) goto out; send_addr_notify = 1; } if (ida[IFLA_BROADCAST - 1]) { if (ida[IFLA_BROADCAST - 1]->rta_len != RTA_LENGTH(dev->addr_len)) goto out; memcpy(dev->broadcast, RTA_DATA(ida[IFLA_BROADCAST - 1]), dev->addr_len); send_addr_notify = 1; } if (ida[IFLA_MTU - 1]) { if (ida[IFLA_MTU - 1]->rta_len != RTA_LENGTH(sizeof(u32))) goto out; err = dev_set_mtu(dev, *((u32 *) RTA_DATA(ida[IFLA_MTU - 1]))); if (err) goto out; } if (ida[IFLA_TXQLEN - 1]) { if (ida[IFLA_TXQLEN - 1]->rta_len != RTA_LENGTH(sizeof(u32))) goto out; dev->tx_queue_len = *((u32 *) RTA_DATA(ida[IFLA_TXQLEN - 1])); } if (ida[IFLA_WEIGHT - 1]) { if (ida[IFLA_WEIGHT - 1]->rta_len != RTA_LENGTH(sizeof(u32))) goto out; dev->weight = *((u32 *) RTA_DATA(ida[IFLA_WEIGHT - 1])); } if (ida[IFLA_OPERSTATE - 1]) { if (ida[IFLA_OPERSTATE - 1]->rta_len != RTA_LENGTH(sizeof(u8))) goto out; set_operstate(dev, *((u8 *) RTA_DATA(ida[IFLA_OPERSTATE - 1]))); } if (ida[IFLA_LINKMODE - 1]) { if (ida[IFLA_LINKMODE - 1]->rta_len != RTA_LENGTH(sizeof(u8))) goto out; write_lock_bh(&dev_base_lock); dev->link_mode = *((u8 *) RTA_DATA(ida[IFLA_LINKMODE - 1])); write_unlock_bh(&dev_base_lock); } if (ifm->ifi_index >= 0 && ida[IFLA_IFNAME - 1]) { char ifname[IFNAMSIZ]; if (rtattr_strlcpy(ifname, ida[IFLA_IFNAME - 1], IFNAMSIZ) >= IFNAMSIZ) goto out; err = dev_change_name(dev, ifname); if (err) goto out; } #ifdef CONFIG_NET_WIRELESS_RTNETLINK if (ida[IFLA_WIRELESS - 1]) { /* Call Wireless Extensions. * Various stuff checked in there... */ err = wireless_rtnetlink_set(dev, RTA_DATA(ida[IFLA_WIRELESS - 1]), ida[IFLA_WIRELESS - 1]->rta_len); if (err) goto out; } #endif /* CONFIG_NET_WIRELESS_RTNETLINK */ err = 0; out: if (send_addr_notify) call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); dev_put(dev); return err; }