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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 13:55:32 +00:00
![Tom Herbert](/assets/img/avatar_default.png)
The name NETIF_F_ALL_CSUM is a misnomer. This does not correspond to the set of features for offloading all checksums. This is a mask of the checksum offload related features bits. It is incorrect to set both NETIF_F_HW_CSUM and NETIF_F_IP_CSUM or NETIF_F_IPV6 at the same time for features of a device. This patch: - Changes instances of NETIF_F_ALL_CSUM to NETIF_F_CSUM_MASK (where NETIF_F_ALL_CSUM is being used as a mask). - Changes bonding, sfc/efx, ipvlan, macvlan, vlan, and team drivers to use NEITF_F_HW_CSUM in features list instead of NETIF_F_ALL_CSUM. Signed-off-by: Tom Herbert <tom@herbertland.com> Signed-off-by: David S. Miller <davem@davemloft.net>
801 lines
20 KiB
C
801 lines
20 KiB
C
/* Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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*/
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#include "ipvlan.h"
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void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev)
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{
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ipvlan->dev->mtu = dev->mtu - ipvlan->mtu_adj;
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}
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void ipvlan_set_port_mode(struct ipvl_port *port, u32 nval)
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{
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struct ipvl_dev *ipvlan;
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if (port->mode != nval) {
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list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
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if (nval == IPVLAN_MODE_L3)
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ipvlan->dev->flags |= IFF_NOARP;
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else
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ipvlan->dev->flags &= ~IFF_NOARP;
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}
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port->mode = nval;
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}
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}
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static int ipvlan_port_create(struct net_device *dev)
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{
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struct ipvl_port *port;
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int err, idx;
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if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) {
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netdev_err(dev, "Master is either lo or non-ether device\n");
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return -EINVAL;
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}
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if (netif_is_macvlan_port(dev)) {
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netdev_err(dev, "Master is a macvlan port.\n");
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return -EBUSY;
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}
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port = kzalloc(sizeof(struct ipvl_port), GFP_KERNEL);
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if (!port)
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return -ENOMEM;
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port->dev = dev;
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port->mode = IPVLAN_MODE_L3;
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INIT_LIST_HEAD(&port->ipvlans);
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for (idx = 0; idx < IPVLAN_HASH_SIZE; idx++)
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INIT_HLIST_HEAD(&port->hlhead[idx]);
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skb_queue_head_init(&port->backlog);
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INIT_WORK(&port->wq, ipvlan_process_multicast);
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err = netdev_rx_handler_register(dev, ipvlan_handle_frame, port);
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if (err)
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goto err;
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dev->priv_flags |= IFF_IPVLAN_MASTER;
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return 0;
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err:
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kfree_rcu(port, rcu);
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return err;
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}
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static void ipvlan_port_destroy(struct net_device *dev)
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{
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struct ipvl_port *port = ipvlan_port_get_rtnl(dev);
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dev->priv_flags &= ~IFF_IPVLAN_MASTER;
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netdev_rx_handler_unregister(dev);
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cancel_work_sync(&port->wq);
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__skb_queue_purge(&port->backlog);
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kfree_rcu(port, rcu);
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}
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/* ipvlan network devices have devices nesting below it and are a special
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* "super class" of normal network devices; split their locks off into a
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* separate class since they always nest.
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*/
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static struct lock_class_key ipvlan_netdev_xmit_lock_key;
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static struct lock_class_key ipvlan_netdev_addr_lock_key;
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#define IPVLAN_FEATURES \
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(NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
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NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
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NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
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NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
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#define IPVLAN_STATE_MASK \
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((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
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static void ipvlan_set_lockdep_class_one(struct net_device *dev,
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struct netdev_queue *txq,
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void *_unused)
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{
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lockdep_set_class(&txq->_xmit_lock, &ipvlan_netdev_xmit_lock_key);
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}
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static void ipvlan_set_lockdep_class(struct net_device *dev)
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{
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lockdep_set_class(&dev->addr_list_lock, &ipvlan_netdev_addr_lock_key);
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netdev_for_each_tx_queue(dev, ipvlan_set_lockdep_class_one, NULL);
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}
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static int ipvlan_init(struct net_device *dev)
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{
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struct ipvl_dev *ipvlan = netdev_priv(dev);
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const struct net_device *phy_dev = ipvlan->phy_dev;
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dev->state = (dev->state & ~IPVLAN_STATE_MASK) |
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(phy_dev->state & IPVLAN_STATE_MASK);
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dev->features = phy_dev->features & IPVLAN_FEATURES;
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dev->features |= NETIF_F_LLTX;
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dev->gso_max_size = phy_dev->gso_max_size;
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dev->hard_header_len = phy_dev->hard_header_len;
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ipvlan_set_lockdep_class(dev);
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ipvlan->pcpu_stats = alloc_percpu(struct ipvl_pcpu_stats);
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if (!ipvlan->pcpu_stats)
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return -ENOMEM;
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return 0;
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}
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static void ipvlan_uninit(struct net_device *dev)
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{
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struct ipvl_dev *ipvlan = netdev_priv(dev);
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struct ipvl_port *port = ipvlan->port;
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free_percpu(ipvlan->pcpu_stats);
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port->count -= 1;
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if (!port->count)
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ipvlan_port_destroy(port->dev);
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}
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static int ipvlan_open(struct net_device *dev)
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{
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struct ipvl_dev *ipvlan = netdev_priv(dev);
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struct net_device *phy_dev = ipvlan->phy_dev;
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struct ipvl_addr *addr;
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if (ipvlan->port->mode == IPVLAN_MODE_L3)
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dev->flags |= IFF_NOARP;
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else
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dev->flags &= ~IFF_NOARP;
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list_for_each_entry(addr, &ipvlan->addrs, anode)
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ipvlan_ht_addr_add(ipvlan, addr);
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return dev_uc_add(phy_dev, phy_dev->dev_addr);
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}
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static int ipvlan_stop(struct net_device *dev)
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{
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struct ipvl_dev *ipvlan = netdev_priv(dev);
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struct net_device *phy_dev = ipvlan->phy_dev;
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struct ipvl_addr *addr;
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dev_uc_unsync(phy_dev, dev);
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dev_mc_unsync(phy_dev, dev);
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dev_uc_del(phy_dev, phy_dev->dev_addr);
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list_for_each_entry(addr, &ipvlan->addrs, anode)
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ipvlan_ht_addr_del(addr);
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return 0;
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}
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static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb,
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struct net_device *dev)
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{
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const struct ipvl_dev *ipvlan = netdev_priv(dev);
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int skblen = skb->len;
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int ret;
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ret = ipvlan_queue_xmit(skb, dev);
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if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
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struct ipvl_pcpu_stats *pcptr;
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pcptr = this_cpu_ptr(ipvlan->pcpu_stats);
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u64_stats_update_begin(&pcptr->syncp);
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pcptr->tx_pkts++;
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pcptr->tx_bytes += skblen;
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u64_stats_update_end(&pcptr->syncp);
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} else {
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this_cpu_inc(ipvlan->pcpu_stats->tx_drps);
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}
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return ret;
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}
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static netdev_features_t ipvlan_fix_features(struct net_device *dev,
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netdev_features_t features)
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{
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struct ipvl_dev *ipvlan = netdev_priv(dev);
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return features & (ipvlan->sfeatures | ~IPVLAN_FEATURES);
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}
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static void ipvlan_change_rx_flags(struct net_device *dev, int change)
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{
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struct ipvl_dev *ipvlan = netdev_priv(dev);
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struct net_device *phy_dev = ipvlan->phy_dev;
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if (change & IFF_ALLMULTI)
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dev_set_allmulti(phy_dev, dev->flags & IFF_ALLMULTI? 1 : -1);
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}
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static void ipvlan_set_multicast_mac_filter(struct net_device *dev)
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{
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struct ipvl_dev *ipvlan = netdev_priv(dev);
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if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
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bitmap_fill(ipvlan->mac_filters, IPVLAN_MAC_FILTER_SIZE);
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} else {
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struct netdev_hw_addr *ha;
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DECLARE_BITMAP(mc_filters, IPVLAN_MAC_FILTER_SIZE);
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bitmap_zero(mc_filters, IPVLAN_MAC_FILTER_SIZE);
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netdev_for_each_mc_addr(ha, dev)
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__set_bit(ipvlan_mac_hash(ha->addr), mc_filters);
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/* Turn-on broadcast bit irrespective of address family,
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* since broadcast is deferred to a work-queue, hence no
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* impact on fast-path processing.
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*/
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__set_bit(ipvlan_mac_hash(dev->broadcast), mc_filters);
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bitmap_copy(ipvlan->mac_filters, mc_filters,
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IPVLAN_MAC_FILTER_SIZE);
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}
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dev_uc_sync(ipvlan->phy_dev, dev);
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dev_mc_sync(ipvlan->phy_dev, dev);
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}
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static struct rtnl_link_stats64 *ipvlan_get_stats64(struct net_device *dev,
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struct rtnl_link_stats64 *s)
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{
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struct ipvl_dev *ipvlan = netdev_priv(dev);
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if (ipvlan->pcpu_stats) {
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struct ipvl_pcpu_stats *pcptr;
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u64 rx_pkts, rx_bytes, rx_mcast, tx_pkts, tx_bytes;
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u32 rx_errs = 0, tx_drps = 0;
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u32 strt;
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int idx;
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for_each_possible_cpu(idx) {
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pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx);
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do {
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strt= u64_stats_fetch_begin_irq(&pcptr->syncp);
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rx_pkts = pcptr->rx_pkts;
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rx_bytes = pcptr->rx_bytes;
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rx_mcast = pcptr->rx_mcast;
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tx_pkts = pcptr->tx_pkts;
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tx_bytes = pcptr->tx_bytes;
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} while (u64_stats_fetch_retry_irq(&pcptr->syncp,
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strt));
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s->rx_packets += rx_pkts;
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s->rx_bytes += rx_bytes;
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s->multicast += rx_mcast;
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s->tx_packets += tx_pkts;
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s->tx_bytes += tx_bytes;
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/* u32 values are updated without syncp protection. */
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rx_errs += pcptr->rx_errs;
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tx_drps += pcptr->tx_drps;
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}
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s->rx_errors = rx_errs;
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s->rx_dropped = rx_errs;
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s->tx_dropped = tx_drps;
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}
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return s;
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}
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static int ipvlan_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
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{
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struct ipvl_dev *ipvlan = netdev_priv(dev);
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struct net_device *phy_dev = ipvlan->phy_dev;
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return vlan_vid_add(phy_dev, proto, vid);
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}
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static int ipvlan_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
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u16 vid)
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{
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struct ipvl_dev *ipvlan = netdev_priv(dev);
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struct net_device *phy_dev = ipvlan->phy_dev;
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vlan_vid_del(phy_dev, proto, vid);
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return 0;
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}
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static int ipvlan_get_iflink(const struct net_device *dev)
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{
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struct ipvl_dev *ipvlan = netdev_priv(dev);
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return ipvlan->phy_dev->ifindex;
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}
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static const struct net_device_ops ipvlan_netdev_ops = {
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.ndo_init = ipvlan_init,
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.ndo_uninit = ipvlan_uninit,
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.ndo_open = ipvlan_open,
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.ndo_stop = ipvlan_stop,
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.ndo_start_xmit = ipvlan_start_xmit,
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.ndo_fix_features = ipvlan_fix_features,
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.ndo_change_rx_flags = ipvlan_change_rx_flags,
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.ndo_set_rx_mode = ipvlan_set_multicast_mac_filter,
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.ndo_get_stats64 = ipvlan_get_stats64,
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.ndo_vlan_rx_add_vid = ipvlan_vlan_rx_add_vid,
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.ndo_vlan_rx_kill_vid = ipvlan_vlan_rx_kill_vid,
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.ndo_get_iflink = ipvlan_get_iflink,
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};
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static int ipvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
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unsigned short type, const void *daddr,
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const void *saddr, unsigned len)
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{
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const struct ipvl_dev *ipvlan = netdev_priv(dev);
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struct net_device *phy_dev = ipvlan->phy_dev;
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/* TODO Probably use a different field than dev_addr so that the
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* mac-address on the virtual device is portable and can be carried
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* while the packets use the mac-addr on the physical device.
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*/
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return dev_hard_header(skb, phy_dev, type, daddr,
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saddr ? : dev->dev_addr, len);
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}
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static const struct header_ops ipvlan_header_ops = {
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.create = ipvlan_hard_header,
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.parse = eth_header_parse,
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.cache = eth_header_cache,
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.cache_update = eth_header_cache_update,
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};
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static int ipvlan_ethtool_get_settings(struct net_device *dev,
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struct ethtool_cmd *cmd)
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{
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const struct ipvl_dev *ipvlan = netdev_priv(dev);
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return __ethtool_get_settings(ipvlan->phy_dev, cmd);
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}
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static void ipvlan_ethtool_get_drvinfo(struct net_device *dev,
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struct ethtool_drvinfo *drvinfo)
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{
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strlcpy(drvinfo->driver, IPVLAN_DRV, sizeof(drvinfo->driver));
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strlcpy(drvinfo->version, IPV_DRV_VER, sizeof(drvinfo->version));
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}
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static u32 ipvlan_ethtool_get_msglevel(struct net_device *dev)
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{
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const struct ipvl_dev *ipvlan = netdev_priv(dev);
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return ipvlan->msg_enable;
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}
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static void ipvlan_ethtool_set_msglevel(struct net_device *dev, u32 value)
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{
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struct ipvl_dev *ipvlan = netdev_priv(dev);
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ipvlan->msg_enable = value;
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}
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static const struct ethtool_ops ipvlan_ethtool_ops = {
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.get_link = ethtool_op_get_link,
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.get_settings = ipvlan_ethtool_get_settings,
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.get_drvinfo = ipvlan_ethtool_get_drvinfo,
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.get_msglevel = ipvlan_ethtool_get_msglevel,
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.set_msglevel = ipvlan_ethtool_set_msglevel,
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};
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static int ipvlan_nl_changelink(struct net_device *dev,
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struct nlattr *tb[], struct nlattr *data[])
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{
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struct ipvl_dev *ipvlan = netdev_priv(dev);
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struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
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if (data && data[IFLA_IPVLAN_MODE]) {
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u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
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ipvlan_set_port_mode(port, nmode);
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}
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return 0;
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}
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static size_t ipvlan_nl_getsize(const struct net_device *dev)
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{
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return (0
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+ nla_total_size(2) /* IFLA_IPVLAN_MODE */
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);
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}
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static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[])
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{
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if (data && data[IFLA_IPVLAN_MODE]) {
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u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
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if (mode < IPVLAN_MODE_L2 || mode >= IPVLAN_MODE_MAX)
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return -EINVAL;
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}
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return 0;
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}
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static int ipvlan_nl_fillinfo(struct sk_buff *skb,
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const struct net_device *dev)
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{
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struct ipvl_dev *ipvlan = netdev_priv(dev);
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struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev);
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int ret = -EINVAL;
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if (!port)
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goto err;
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ret = -EMSGSIZE;
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if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode))
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goto err;
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return 0;
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err:
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return ret;
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}
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static int ipvlan_link_new(struct net *src_net, struct net_device *dev,
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struct nlattr *tb[], struct nlattr *data[])
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{
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struct ipvl_dev *ipvlan = netdev_priv(dev);
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struct ipvl_port *port;
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struct net_device *phy_dev;
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int err;
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if (!tb[IFLA_LINK])
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return -EINVAL;
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phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
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if (!phy_dev)
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return -ENODEV;
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if (netif_is_ipvlan(phy_dev)) {
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struct ipvl_dev *tmp = netdev_priv(phy_dev);
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phy_dev = tmp->phy_dev;
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} else if (!netif_is_ipvlan_port(phy_dev)) {
|
|
err = ipvlan_port_create(phy_dev);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
port = ipvlan_port_get_rtnl(phy_dev);
|
|
if (data && data[IFLA_IPVLAN_MODE])
|
|
port->mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
|
|
|
|
ipvlan->phy_dev = phy_dev;
|
|
ipvlan->dev = dev;
|
|
ipvlan->port = port;
|
|
ipvlan->sfeatures = IPVLAN_FEATURES;
|
|
INIT_LIST_HEAD(&ipvlan->addrs);
|
|
|
|
/* TODO Probably put random address here to be presented to the
|
|
* world but keep using the physical-dev address for the outgoing
|
|
* packets.
|
|
*/
|
|
memcpy(dev->dev_addr, phy_dev->dev_addr, ETH_ALEN);
|
|
|
|
dev->priv_flags |= IFF_IPVLAN_SLAVE;
|
|
|
|
port->count += 1;
|
|
err = register_netdevice(dev);
|
|
if (err < 0)
|
|
goto ipvlan_destroy_port;
|
|
|
|
err = netdev_upper_dev_link(phy_dev, dev);
|
|
if (err)
|
|
goto ipvlan_destroy_port;
|
|
|
|
list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans);
|
|
netif_stacked_transfer_operstate(phy_dev, dev);
|
|
return 0;
|
|
|
|
ipvlan_destroy_port:
|
|
port->count -= 1;
|
|
if (!port->count)
|
|
ipvlan_port_destroy(phy_dev);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void ipvlan_link_delete(struct net_device *dev, struct list_head *head)
|
|
{
|
|
struct ipvl_dev *ipvlan = netdev_priv(dev);
|
|
struct ipvl_addr *addr, *next;
|
|
|
|
list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) {
|
|
ipvlan_ht_addr_del(addr);
|
|
list_del(&addr->anode);
|
|
kfree_rcu(addr, rcu);
|
|
}
|
|
|
|
list_del_rcu(&ipvlan->pnode);
|
|
unregister_netdevice_queue(dev, head);
|
|
netdev_upper_dev_unlink(ipvlan->phy_dev, dev);
|
|
}
|
|
|
|
static void ipvlan_link_setup(struct net_device *dev)
|
|
{
|
|
ether_setup(dev);
|
|
|
|
dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
|
|
dev->priv_flags |= IFF_UNICAST_FLT | IFF_NO_QUEUE;
|
|
dev->netdev_ops = &ipvlan_netdev_ops;
|
|
dev->destructor = free_netdev;
|
|
dev->header_ops = &ipvlan_header_ops;
|
|
dev->ethtool_ops = &ipvlan_ethtool_ops;
|
|
}
|
|
|
|
static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] =
|
|
{
|
|
[IFLA_IPVLAN_MODE] = { .type = NLA_U16 },
|
|
};
|
|
|
|
static struct rtnl_link_ops ipvlan_link_ops = {
|
|
.kind = "ipvlan",
|
|
.priv_size = sizeof(struct ipvl_dev),
|
|
|
|
.get_size = ipvlan_nl_getsize,
|
|
.policy = ipvlan_nl_policy,
|
|
.validate = ipvlan_nl_validate,
|
|
.fill_info = ipvlan_nl_fillinfo,
|
|
.changelink = ipvlan_nl_changelink,
|
|
.maxtype = IFLA_IPVLAN_MAX,
|
|
|
|
.setup = ipvlan_link_setup,
|
|
.newlink = ipvlan_link_new,
|
|
.dellink = ipvlan_link_delete,
|
|
};
|
|
|
|
static int ipvlan_link_register(struct rtnl_link_ops *ops)
|
|
{
|
|
return rtnl_link_register(ops);
|
|
}
|
|
|
|
static int ipvlan_device_event(struct notifier_block *unused,
|
|
unsigned long event, void *ptr)
|
|
{
|
|
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
|
|
struct ipvl_dev *ipvlan, *next;
|
|
struct ipvl_port *port;
|
|
LIST_HEAD(lst_kill);
|
|
|
|
if (!netif_is_ipvlan_port(dev))
|
|
return NOTIFY_DONE;
|
|
|
|
port = ipvlan_port_get_rtnl(dev);
|
|
|
|
switch (event) {
|
|
case NETDEV_CHANGE:
|
|
list_for_each_entry(ipvlan, &port->ipvlans, pnode)
|
|
netif_stacked_transfer_operstate(ipvlan->phy_dev,
|
|
ipvlan->dev);
|
|
break;
|
|
|
|
case NETDEV_UNREGISTER:
|
|
if (dev->reg_state != NETREG_UNREGISTERING)
|
|
break;
|
|
|
|
list_for_each_entry_safe(ipvlan, next, &port->ipvlans,
|
|
pnode)
|
|
ipvlan->dev->rtnl_link_ops->dellink(ipvlan->dev,
|
|
&lst_kill);
|
|
unregister_netdevice_many(&lst_kill);
|
|
break;
|
|
|
|
case NETDEV_FEAT_CHANGE:
|
|
list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
|
|
ipvlan->dev->features = dev->features & IPVLAN_FEATURES;
|
|
ipvlan->dev->gso_max_size = dev->gso_max_size;
|
|
netdev_features_change(ipvlan->dev);
|
|
}
|
|
break;
|
|
|
|
case NETDEV_CHANGEMTU:
|
|
list_for_each_entry(ipvlan, &port->ipvlans, pnode)
|
|
ipvlan_adjust_mtu(ipvlan, dev);
|
|
break;
|
|
|
|
case NETDEV_PRE_TYPE_CHANGE:
|
|
/* Forbid underlying device to change its type. */
|
|
return NOTIFY_BAD;
|
|
}
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
|
|
{
|
|
struct ipvl_addr *addr;
|
|
|
|
if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) {
|
|
netif_err(ipvlan, ifup, ipvlan->dev,
|
|
"Failed to add IPv6=%pI6c addr for %s intf\n",
|
|
ip6_addr, ipvlan->dev->name);
|
|
return -EINVAL;
|
|
}
|
|
addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC);
|
|
if (!addr)
|
|
return -ENOMEM;
|
|
|
|
addr->master = ipvlan;
|
|
memcpy(&addr->ip6addr, ip6_addr, sizeof(struct in6_addr));
|
|
addr->atype = IPVL_IPV6;
|
|
list_add_tail(&addr->anode, &ipvlan->addrs);
|
|
|
|
/* If the interface is not up, the address will be added to the hash
|
|
* list by ipvlan_open.
|
|
*/
|
|
if (netif_running(ipvlan->dev))
|
|
ipvlan_ht_addr_add(ipvlan, addr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
|
|
{
|
|
struct ipvl_addr *addr;
|
|
|
|
addr = ipvlan_find_addr(ipvlan, ip6_addr, true);
|
|
if (!addr)
|
|
return;
|
|
|
|
ipvlan_ht_addr_del(addr);
|
|
list_del(&addr->anode);
|
|
kfree_rcu(addr, rcu);
|
|
|
|
return;
|
|
}
|
|
|
|
static int ipvlan_addr6_event(struct notifier_block *unused,
|
|
unsigned long event, void *ptr)
|
|
{
|
|
struct inet6_ifaddr *if6 = (struct inet6_ifaddr *)ptr;
|
|
struct net_device *dev = (struct net_device *)if6->idev->dev;
|
|
struct ipvl_dev *ipvlan = netdev_priv(dev);
|
|
|
|
/* FIXME IPv6 autoconf calls us from bh without RTNL */
|
|
if (in_softirq())
|
|
return NOTIFY_DONE;
|
|
|
|
if (!netif_is_ipvlan(dev))
|
|
return NOTIFY_DONE;
|
|
|
|
if (!ipvlan || !ipvlan->port)
|
|
return NOTIFY_DONE;
|
|
|
|
switch (event) {
|
|
case NETDEV_UP:
|
|
if (ipvlan_add_addr6(ipvlan, &if6->addr))
|
|
return NOTIFY_BAD;
|
|
break;
|
|
|
|
case NETDEV_DOWN:
|
|
ipvlan_del_addr6(ipvlan, &if6->addr);
|
|
break;
|
|
}
|
|
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
|
|
{
|
|
struct ipvl_addr *addr;
|
|
|
|
if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false)) {
|
|
netif_err(ipvlan, ifup, ipvlan->dev,
|
|
"Failed to add IPv4=%pI4 on %s intf.\n",
|
|
ip4_addr, ipvlan->dev->name);
|
|
return -EINVAL;
|
|
}
|
|
addr = kzalloc(sizeof(struct ipvl_addr), GFP_KERNEL);
|
|
if (!addr)
|
|
return -ENOMEM;
|
|
|
|
addr->master = ipvlan;
|
|
memcpy(&addr->ip4addr, ip4_addr, sizeof(struct in_addr));
|
|
addr->atype = IPVL_IPV4;
|
|
list_add_tail(&addr->anode, &ipvlan->addrs);
|
|
|
|
/* If the interface is not up, the address will be added to the hash
|
|
* list by ipvlan_open.
|
|
*/
|
|
if (netif_running(ipvlan->dev))
|
|
ipvlan_ht_addr_add(ipvlan, addr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
|
|
{
|
|
struct ipvl_addr *addr;
|
|
|
|
addr = ipvlan_find_addr(ipvlan, ip4_addr, false);
|
|
if (!addr)
|
|
return;
|
|
|
|
ipvlan_ht_addr_del(addr);
|
|
list_del(&addr->anode);
|
|
kfree_rcu(addr, rcu);
|
|
|
|
return;
|
|
}
|
|
|
|
static int ipvlan_addr4_event(struct notifier_block *unused,
|
|
unsigned long event, void *ptr)
|
|
{
|
|
struct in_ifaddr *if4 = (struct in_ifaddr *)ptr;
|
|
struct net_device *dev = (struct net_device *)if4->ifa_dev->dev;
|
|
struct ipvl_dev *ipvlan = netdev_priv(dev);
|
|
struct in_addr ip4_addr;
|
|
|
|
if (!netif_is_ipvlan(dev))
|
|
return NOTIFY_DONE;
|
|
|
|
if (!ipvlan || !ipvlan->port)
|
|
return NOTIFY_DONE;
|
|
|
|
switch (event) {
|
|
case NETDEV_UP:
|
|
ip4_addr.s_addr = if4->ifa_address;
|
|
if (ipvlan_add_addr4(ipvlan, &ip4_addr))
|
|
return NOTIFY_BAD;
|
|
break;
|
|
|
|
case NETDEV_DOWN:
|
|
ip4_addr.s_addr = if4->ifa_address;
|
|
ipvlan_del_addr4(ipvlan, &ip4_addr);
|
|
break;
|
|
}
|
|
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = {
|
|
.notifier_call = ipvlan_addr4_event,
|
|
};
|
|
|
|
static struct notifier_block ipvlan_notifier_block __read_mostly = {
|
|
.notifier_call = ipvlan_device_event,
|
|
};
|
|
|
|
static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = {
|
|
.notifier_call = ipvlan_addr6_event,
|
|
};
|
|
|
|
static int __init ipvlan_init_module(void)
|
|
{
|
|
int err;
|
|
|
|
ipvlan_init_secret();
|
|
register_netdevice_notifier(&ipvlan_notifier_block);
|
|
register_inet6addr_notifier(&ipvlan_addr6_notifier_block);
|
|
register_inetaddr_notifier(&ipvlan_addr4_notifier_block);
|
|
|
|
err = ipvlan_link_register(&ipvlan_link_ops);
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
return 0;
|
|
error:
|
|
unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
|
|
unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
|
|
unregister_netdevice_notifier(&ipvlan_notifier_block);
|
|
return err;
|
|
}
|
|
|
|
static void __exit ipvlan_cleanup_module(void)
|
|
{
|
|
rtnl_link_unregister(&ipvlan_link_ops);
|
|
unregister_netdevice_notifier(&ipvlan_notifier_block);
|
|
unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
|
|
unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block);
|
|
}
|
|
|
|
module_init(ipvlan_init_module);
|
|
module_exit(ipvlan_cleanup_module);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>");
|
|
MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs");
|
|
MODULE_ALIAS_RTNL_LINK("ipvlan");
|