static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
struct netlink_ext_ack *extack)
{
+ struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
+ unsigned char name_assign_type = NET_NAME_USER;
+ struct nlattr *linkinfo[IFLA_INFO_MAX + 1];
+ const struct rtnl_link_ops *m_ops = NULL;
+ struct nlattr *attr[RTNL_MAX_TYPE + 1];
+ struct net_device *master_dev = NULL;
struct net *net = sock_net(skb->sk);
const struct rtnl_link_ops *ops;
- const struct rtnl_link_ops *m_ops = NULL;
+ struct nlattr *tb[IFLA_MAX + 1];
+ struct net *dest_net, *link_net;
+ struct nlattr **slave_data;
+ char kind[MODULE_NAME_LEN];
struct net_device *dev;
- struct net_device *master_dev = NULL;
struct ifinfomsg *ifm;
- char kind[MODULE_NAME_LEN];
char ifname[IFNAMSIZ];
- struct nlattr *tb[IFLA_MAX+1];
- struct nlattr *linkinfo[IFLA_INFO_MAX+1];
- unsigned char name_assign_type = NET_NAME_USER;
+ struct nlattr **data;
int err;
#ifdef CONFIG_MODULES
ops = NULL;
}
- if (1) {
- struct nlattr *attr[RTNL_MAX_TYPE + 1];
- struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
- struct nlattr **data = NULL;
- struct nlattr **slave_data = NULL;
- struct net *dest_net, *link_net = NULL;
-
- if (ops) {
- if (ops->maxtype > RTNL_MAX_TYPE)
- return -EINVAL;
+ data = NULL;
+ if (ops) {
+ if (ops->maxtype > RTNL_MAX_TYPE)
+ return -EINVAL;
- if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
- err = nla_parse_nested(attr, ops->maxtype,
- linkinfo[IFLA_INFO_DATA],
- ops->policy, extack);
- if (err < 0)
- return err;
- data = attr;
- }
- if (ops->validate) {
- err = ops->validate(tb, data, extack);
- if (err < 0)
- return err;
- }
+ if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
+ err = nla_parse_nested(attr, ops->maxtype,
+ linkinfo[IFLA_INFO_DATA],
+ ops->policy, extack);
+ if (err < 0)
+ return err;
+ data = attr;
+ }
+ if (ops->validate) {
+ err = ops->validate(tb, data, extack);
+ if (err < 0)
+ return err;
}
+ }
- if (m_ops) {
- if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
- return -EINVAL;
+ slave_data = NULL;
+ if (m_ops) {
+ if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
+ return -EINVAL;
- if (m_ops->slave_maxtype &&
- linkinfo[IFLA_INFO_SLAVE_DATA]) {
- err = nla_parse_nested(slave_attr,
- m_ops->slave_maxtype,
- linkinfo[IFLA_INFO_SLAVE_DATA],
- m_ops->slave_policy,
- extack);
- if (err < 0)
- return err;
- slave_data = slave_attr;
- }
+ if (m_ops->slave_maxtype &&
+ linkinfo[IFLA_INFO_SLAVE_DATA]) {
+ err = nla_parse_nested(slave_attr, m_ops->slave_maxtype,
+ linkinfo[IFLA_INFO_SLAVE_DATA],
+ m_ops->slave_policy, extack);
+ if (err < 0)
+ return err;
+ slave_data = slave_attr;
}
+ }
- if (dev) {
- int status = 0;
-
- if (nlh->nlmsg_flags & NLM_F_EXCL)
- return -EEXIST;
- if (nlh->nlmsg_flags & NLM_F_REPLACE)
- return -EOPNOTSUPP;
+ if (dev) {
+ int status = 0;
- if (linkinfo[IFLA_INFO_DATA]) {
- if (!ops || ops != dev->rtnl_link_ops ||
- !ops->changelink)
- return -EOPNOTSUPP;
+ if (nlh->nlmsg_flags & NLM_F_EXCL)
+ return -EEXIST;
+ if (nlh->nlmsg_flags & NLM_F_REPLACE)
+ return -EOPNOTSUPP;
- err = ops->changelink(dev, tb, data, extack);
- if (err < 0)
- return err;
- status |= DO_SETLINK_NOTIFY;
- }
+ if (linkinfo[IFLA_INFO_DATA]) {
+ if (!ops || ops != dev->rtnl_link_ops ||
+ !ops->changelink)
+ return -EOPNOTSUPP;
- if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
- if (!m_ops || !m_ops->slave_changelink)
- return -EOPNOTSUPP;
+ err = ops->changelink(dev, tb, data, extack);
+ if (err < 0)
+ return err;
+ status |= DO_SETLINK_NOTIFY;
+ }
- err = m_ops->slave_changelink(master_dev, dev,
- tb, slave_data,
- extack);
- if (err < 0)
- return err;
- status |= DO_SETLINK_NOTIFY;
- }
+ if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
+ if (!m_ops || !m_ops->slave_changelink)
+ return -EOPNOTSUPP;
- return do_setlink(skb, dev, ifm, extack, tb, ifname,
- status);
+ err = m_ops->slave_changelink(master_dev, dev, tb,
+ slave_data, extack);
+ if (err < 0)
+ return err;
+ status |= DO_SETLINK_NOTIFY;
}
- if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
- if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
- return rtnl_group_changelink(skb, net,
+ return do_setlink(skb, dev, ifm, extack, tb, ifname, status);
+ }
+
+ if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
+ if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
+ return rtnl_group_changelink(skb, net,
nla_get_u32(tb[IFLA_GROUP]),
ifm, extack, tb);
- return -ENODEV;
- }
+ return -ENODEV;
+ }
- if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
- return -EOPNOTSUPP;
+ if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
+ return -EOPNOTSUPP;
- if (!ops) {
+ if (!ops) {
#ifdef CONFIG_MODULES
- if (kind[0]) {
- __rtnl_unlock();
- request_module("rtnl-link-%s", kind);
- rtnl_lock();
- ops = rtnl_link_ops_get(kind);
- if (ops)
- goto replay;
- }
-#endif
- NL_SET_ERR_MSG(extack, "Unknown device type");
- return -EOPNOTSUPP;
+ if (kind[0]) {
+ __rtnl_unlock();
+ request_module("rtnl-link-%s", kind);
+ rtnl_lock();
+ ops = rtnl_link_ops_get(kind);
+ if (ops)
+ goto replay;
}
+#endif
+ NL_SET_ERR_MSG(extack, "Unknown device type");
+ return -EOPNOTSUPP;
+ }
- if (!ops->setup)
- return -EOPNOTSUPP;
-
- if (!ifname[0]) {
- snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
- name_assign_type = NET_NAME_ENUM;
- }
+ if (!ops->setup)
+ return -EOPNOTSUPP;
- dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
- if (IS_ERR(dest_net))
- return PTR_ERR(dest_net);
+ if (!ifname[0]) {
+ snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
+ name_assign_type = NET_NAME_ENUM;
+ }
- if (tb[IFLA_LINK_NETNSID]) {
- int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
+ dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
+ if (IS_ERR(dest_net))
+ return PTR_ERR(dest_net);
- link_net = get_net_ns_by_id(dest_net, id);
- if (!link_net) {
- NL_SET_ERR_MSG(extack, "Unknown network namespace id");
- err = -EINVAL;
- goto out;
- }
- err = -EPERM;
- if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
- goto out;
- }
+ if (tb[IFLA_LINK_NETNSID]) {
+ int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
- dev = rtnl_create_link(link_net ? : dest_net, ifname,
- name_assign_type, ops, tb, extack);
- if (IS_ERR(dev)) {
- err = PTR_ERR(dev);
+ link_net = get_net_ns_by_id(dest_net, id);
+ if (!link_net) {
+ NL_SET_ERR_MSG(extack, "Unknown network namespace id");
+ err = -EINVAL;
goto out;
}
+ err = -EPERM;
+ if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
+ goto out;
+ } else {
+ link_net = NULL;
+ }
- dev->ifindex = ifm->ifi_index;
+ dev = rtnl_create_link(link_net ? : dest_net, ifname,
+ name_assign_type, ops, tb, extack);
+ if (IS_ERR(dev)) {
+ err = PTR_ERR(dev);
+ goto out;
+ }
- if (ops->newlink) {
- err = ops->newlink(link_net ? : net, dev, tb, data,
- extack);
- /* Drivers should call free_netdev() in ->destructor
- * and unregister it on failure after registration
- * so that device could be finally freed in rtnl_unlock.
- */
- if (err < 0) {
- /* If device is not registered at all, free it now */
- if (dev->reg_state == NETREG_UNINITIALIZED)
- free_netdev(dev);
- goto out;
- }
- } else {
- err = register_netdevice(dev);
- if (err < 0) {
+ dev->ifindex = ifm->ifi_index;
+
+ if (ops->newlink) {
+ err = ops->newlink(link_net ? : net, dev, tb, data, extack);
+ /* Drivers should call free_netdev() in ->destructor
+ * and unregister it on failure after registration
+ * so that device could be finally freed in rtnl_unlock.
+ */
+ if (err < 0) {
+ /* If device is not registered at all, free it now */
+ if (dev->reg_state == NETREG_UNINITIALIZED)
free_netdev(dev);
- goto out;
- }
+ goto out;
+ }
+ } else {
+ err = register_netdevice(dev);
+ if (err < 0) {
+ free_netdev(dev);
+ goto out;
}
- err = rtnl_configure_link(dev, ifm);
+ }
+ err = rtnl_configure_link(dev, ifm);
+ if (err < 0)
+ goto out_unregister;
+ if (link_net) {
+ err = dev_change_net_namespace(dev, dest_net, ifname);
if (err < 0)
goto out_unregister;
- if (link_net) {
- err = dev_change_net_namespace(dev, dest_net, ifname);
- if (err < 0)
- goto out_unregister;
- }
- if (tb[IFLA_MASTER]) {
- err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]),
- extack);
- if (err)
- goto out_unregister;
- }
+ }
+ if (tb[IFLA_MASTER]) {
+ err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
+ if (err)
+ goto out_unregister;
+ }
out:
- if (link_net)
- put_net(link_net);
- put_net(dest_net);
- return err;
+ if (link_net)
+ put_net(link_net);
+ put_net(dest_net);
+ return err;
out_unregister:
- if (ops->newlink) {
- LIST_HEAD(list_kill);
+ if (ops->newlink) {
+ LIST_HEAD(list_kill);
- ops->dellink(dev, &list_kill);
- unregister_netdevice_many(&list_kill);
- } else {
- unregister_netdevice(dev);
- }
- goto out;
+ ops->dellink(dev, &list_kill);
+ unregister_netdevice_many(&list_kill);
+ } else {
+ unregister_netdevice(dev);
}
+ goto out;
}
static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
git.samba.org / sfrench / cifs-2.6.git / blobdiff