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[RTNETLINK]: Split up rtnl_setlink
Split up rtnl_setlink into a function performing validation and a function performing the actual changes. This allows to share the modifcation logic with rtnl_newlink, which is introduced by the next patch. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy
David S. Miller
parent
6472ce6096
commit
0157f60c0c
@ -561,11 +561,140 @@ static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
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[IFLA_LINKMODE] = { .type = NLA_U8 },
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};
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static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
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struct nlattr **tb, char *ifname)
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{
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int modified = 0, send_addr_notify = 0;
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int err;
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if (tb[IFLA_MAP]) {
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struct rtnl_link_ifmap *u_map;
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struct ifmap k_map;
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if (!dev->set_config) {
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err = -EOPNOTSUPP;
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goto errout;
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}
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if (!netif_device_present(dev)) {
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err = -ENODEV;
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goto errout;
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}
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u_map = nla_data(tb[IFLA_MAP]);
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k_map.mem_start = (unsigned long) u_map->mem_start;
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k_map.mem_end = (unsigned long) u_map->mem_end;
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k_map.base_addr = (unsigned short) u_map->base_addr;
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k_map.irq = (unsigned char) u_map->irq;
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k_map.dma = (unsigned char) u_map->dma;
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k_map.port = (unsigned char) u_map->port;
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err = dev->set_config(dev, &k_map);
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if (err < 0)
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goto errout;
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modified = 1;
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}
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if (tb[IFLA_ADDRESS]) {
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struct sockaddr *sa;
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int len;
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if (!dev->set_mac_address) {
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err = -EOPNOTSUPP;
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goto errout;
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}
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if (!netif_device_present(dev)) {
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err = -ENODEV;
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goto errout;
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}
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len = sizeof(sa_family_t) + dev->addr_len;
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sa = kmalloc(len, GFP_KERNEL);
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if (!sa) {
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err = -ENOMEM;
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goto errout;
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}
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sa->sa_family = dev->type;
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memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
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dev->addr_len);
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err = dev->set_mac_address(dev, sa);
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kfree(sa);
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if (err)
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goto errout;
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send_addr_notify = 1;
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modified = 1;
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}
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if (tb[IFLA_MTU]) {
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err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
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if (err < 0)
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goto errout;
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modified = 1;
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}
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/*
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* Interface selected by interface index but interface
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* name provided implies that a name change has been
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* requested.
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*/
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if (ifm->ifi_index > 0 && ifname[0]) {
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err = dev_change_name(dev, ifname);
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if (err < 0)
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goto errout;
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modified = 1;
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}
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if (tb[IFLA_BROADCAST]) {
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nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
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send_addr_notify = 1;
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}
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if (ifm->ifi_flags || ifm->ifi_change) {
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unsigned int flags = ifm->ifi_flags;
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/* bugwards compatibility: ifi_change == 0 is treated as ~0 */
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if (ifm->ifi_change)
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flags = (flags & ifm->ifi_change) |
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(dev->flags & ~ifm->ifi_change);
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dev_change_flags(dev, flags);
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}
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if (tb[IFLA_TXQLEN])
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dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
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if (tb[IFLA_WEIGHT])
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dev->weight = nla_get_u32(tb[IFLA_WEIGHT]);
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if (tb[IFLA_OPERSTATE])
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set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
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if (tb[IFLA_LINKMODE]) {
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write_lock_bh(&dev_base_lock);
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dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
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write_unlock_bh(&dev_base_lock);
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}
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err = 0;
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errout:
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if (err < 0 && modified && net_ratelimit())
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printk(KERN_WARNING "A link change request failed with "
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"some changes comitted already. Interface %s may "
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"have been left with an inconsistent configuration, "
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"please check.\n", dev->name);
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if (send_addr_notify)
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call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
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return err;
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}
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static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
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{
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struct ifinfomsg *ifm;
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struct net_device *dev;
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int err, send_addr_notify = 0, modified = 0;
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int err;
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struct nlattr *tb[IFLA_MAX+1];
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char ifname[IFNAMSIZ];
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@ -600,128 +729,8 @@ static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
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nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
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goto errout_dev;
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if (tb[IFLA_MAP]) {
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struct rtnl_link_ifmap *u_map;
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struct ifmap k_map;
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if (!dev->set_config) {
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err = -EOPNOTSUPP;
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goto errout_dev;
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}
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if (!netif_device_present(dev)) {
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err = -ENODEV;
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goto errout_dev;
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}
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u_map = nla_data(tb[IFLA_MAP]);
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k_map.mem_start = (unsigned long) u_map->mem_start;
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k_map.mem_end = (unsigned long) u_map->mem_end;
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k_map.base_addr = (unsigned short) u_map->base_addr;
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k_map.irq = (unsigned char) u_map->irq;
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k_map.dma = (unsigned char) u_map->dma;
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k_map.port = (unsigned char) u_map->port;
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err = dev->set_config(dev, &k_map);
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if (err < 0)
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goto errout_dev;
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modified = 1;
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}
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if (tb[IFLA_ADDRESS]) {
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struct sockaddr *sa;
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int len;
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if (!dev->set_mac_address) {
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err = -EOPNOTSUPP;
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goto errout_dev;
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}
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if (!netif_device_present(dev)) {
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err = -ENODEV;
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goto errout_dev;
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}
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len = sizeof(sa_family_t) + dev->addr_len;
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sa = kmalloc(len, GFP_KERNEL);
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if (!sa) {
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err = -ENOMEM;
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goto errout_dev;
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}
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sa->sa_family = dev->type;
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memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
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dev->addr_len);
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err = dev->set_mac_address(dev, sa);
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kfree(sa);
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if (err)
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goto errout_dev;
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send_addr_notify = 1;
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modified = 1;
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}
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if (tb[IFLA_MTU]) {
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err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
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if (err < 0)
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goto errout_dev;
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modified = 1;
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}
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/*
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* Interface selected by interface index but interface
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* name provided implies that a name change has been
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* requested.
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*/
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if (ifm->ifi_index > 0 && ifname[0]) {
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err = dev_change_name(dev, ifname);
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if (err < 0)
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goto errout_dev;
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modified = 1;
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}
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if (tb[IFLA_BROADCAST]) {
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nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
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send_addr_notify = 1;
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}
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if (ifm->ifi_flags || ifm->ifi_change) {
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unsigned int flags = ifm->ifi_flags;
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/* bugwards compatibility: ifi_change == 0 is treated as ~0 */
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if (ifm->ifi_change)
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flags = (flags & ifm->ifi_change) |
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(dev->flags & ~ifm->ifi_change);
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dev_change_flags(dev, flags);
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}
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if (tb[IFLA_TXQLEN])
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dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
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if (tb[IFLA_WEIGHT])
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dev->weight = nla_get_u32(tb[IFLA_WEIGHT]);
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if (tb[IFLA_OPERSTATE])
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set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
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if (tb[IFLA_LINKMODE]) {
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write_lock_bh(&dev_base_lock);
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dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
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write_unlock_bh(&dev_base_lock);
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}
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err = 0;
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err = do_setlink(dev, ifm, tb, ifname);
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errout_dev:
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if (err < 0 && modified && net_ratelimit())
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printk(KERN_WARNING "A link change request failed with "
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"some changes comitted already. Interface %s may "
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"have been left with an inconsistent configuration, "
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"please check.\n", dev->name);
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if (send_addr_notify)
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call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
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dev_put(dev);
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errout:
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return err;
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