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1082 lines
28 KiB
1082 lines
28 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* Copyright (c) 2014 Mahesh Bandewar <[email protected]> |
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*/ |
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|
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#include <linux/ethtool.h> |
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|
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#include "ipvlan.h" |
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|
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static int ipvlan_set_port_mode(struct ipvl_port *port, u16 nval, |
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struct netlink_ext_ack *extack) |
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{ |
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struct ipvl_dev *ipvlan; |
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unsigned int flags; |
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int err; |
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|
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ASSERT_RTNL(); |
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if (port->mode != nval) { |
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list_for_each_entry(ipvlan, &port->ipvlans, pnode) { |
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flags = ipvlan->dev->flags; |
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if (nval == IPVLAN_MODE_L3 || nval == IPVLAN_MODE_L3S) { |
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err = dev_change_flags(ipvlan->dev, |
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flags | IFF_NOARP, |
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extack); |
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} else { |
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err = dev_change_flags(ipvlan->dev, |
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flags & ~IFF_NOARP, |
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extack); |
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} |
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if (unlikely(err)) |
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goto fail; |
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} |
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if (nval == IPVLAN_MODE_L3S) { |
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/* New mode is L3S */ |
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err = ipvlan_l3s_register(port); |
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if (err) |
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goto fail; |
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} else if (port->mode == IPVLAN_MODE_L3S) { |
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/* Old mode was L3S */ |
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ipvlan_l3s_unregister(port); |
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} |
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port->mode = nval; |
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} |
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return 0; |
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|
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fail: |
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/* Undo the flags changes that have been done so far. */ |
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list_for_each_entry_continue_reverse(ipvlan, &port->ipvlans, pnode) { |
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flags = ipvlan->dev->flags; |
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if (port->mode == IPVLAN_MODE_L3 || |
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port->mode == IPVLAN_MODE_L3S) |
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dev_change_flags(ipvlan->dev, flags | IFF_NOARP, |
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NULL); |
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else |
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dev_change_flags(ipvlan->dev, flags & ~IFF_NOARP, |
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NULL); |
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} |
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|
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return err; |
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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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port = kzalloc(sizeof(struct ipvl_port), GFP_KERNEL); |
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if (!port) |
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return -ENOMEM; |
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write_pnet(&port->pnet, dev_net(dev)); |
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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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|
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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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ida_init(&port->ida); |
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port->dev_id_start = 1; |
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|
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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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|
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return 0; |
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err: |
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kfree(port); |
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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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struct sk_buff *skb; |
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if (port->mode == IPVLAN_MODE_L3S) |
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ipvlan_l3s_unregister(port); |
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netdev_rx_handler_unregister(dev); |
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cancel_work_sync(&port->wq); |
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while ((skb = __skb_dequeue(&port->backlog)) != NULL) { |
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if (skb->dev) |
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dev_put(skb->dev); |
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kfree_skb(skb); |
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} |
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ida_destroy(&port->ida); |
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kfree(port); |
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} |
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#define IPVLAN_ALWAYS_ON_OFLOADS \ |
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(NETIF_F_SG | NETIF_F_HW_CSUM | \ |
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NETIF_F_GSO_ROBUST | NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL) |
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|
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#define IPVLAN_ALWAYS_ON \ |
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(IPVLAN_ALWAYS_ON_OFLOADS | NETIF_F_LLTX | NETIF_F_VLAN_CHALLENGED) |
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|
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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_ALL_TSO | NETIF_F_GSO_ROBUST | \ |
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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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|
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/* NETIF_F_GSO_ENCAP_ALL NETIF_F_GSO_SOFTWARE Newly added */ |
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|
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#define IPVLAN_STATE_MASK \ |
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((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) |
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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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struct net_device *phy_dev = ipvlan->phy_dev; |
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struct ipvl_port *port; |
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int err; |
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|
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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 |= IPVLAN_ALWAYS_ON; |
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dev->vlan_features = phy_dev->vlan_features & IPVLAN_FEATURES; |
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dev->vlan_features |= IPVLAN_ALWAYS_ON_OFLOADS; |
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dev->hw_enc_features |= dev->features; |
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dev->gso_max_size = phy_dev->gso_max_size; |
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dev->gso_max_segs = phy_dev->gso_max_segs; |
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dev->hard_header_len = phy_dev->hard_header_len; |
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netdev_lockdep_set_classes(dev); |
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ipvlan->pcpu_stats = netdev_alloc_pcpu_stats(struct ipvl_pcpu_stats); |
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if (!ipvlan->pcpu_stats) |
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return -ENOMEM; |
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|
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if (!netif_is_ipvlan_port(phy_dev)) { |
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err = ipvlan_port_create(phy_dev); |
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if (err < 0) { |
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free_percpu(ipvlan->pcpu_stats); |
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return err; |
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} |
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} |
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port = ipvlan_port_get_rtnl(phy_dev); |
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port->count += 1; |
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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 net_device *phy_dev = ipvlan->phy_dev; |
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struct ipvl_port *port; |
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free_percpu(ipvlan->pcpu_stats); |
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port = ipvlan_port_get_rtnl(phy_dev); |
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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 ipvl_addr *addr; |
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|
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if (ipvlan->port->mode == IPVLAN_MODE_L3 || |
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ipvlan->port->mode == IPVLAN_MODE_L3S) |
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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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rcu_read_lock(); |
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list_for_each_entry_rcu(addr, &ipvlan->addrs, anode) |
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ipvlan_ht_addr_add(ipvlan, addr); |
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rcu_read_unlock(); |
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|
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return 0; |
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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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|
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dev_uc_unsync(phy_dev, dev); |
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dev_mc_unsync(phy_dev, dev); |
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rcu_read_lock(); |
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list_for_each_entry_rcu(addr, &ipvlan->addrs, anode) |
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ipvlan_ht_addr_del(addr); |
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rcu_read_unlock(); |
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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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|
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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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|
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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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features |= NETIF_F_ALL_FOR_ALL; |
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features &= (ipvlan->sfeatures | ~IPVLAN_FEATURES); |
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features = netdev_increment_features(ipvlan->phy_dev->features, |
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features, features); |
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features |= IPVLAN_ALWAYS_ON; |
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features &= (IPVLAN_FEATURES | IPVLAN_ALWAYS_ON); |
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return 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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|
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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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|
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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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|
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static void 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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|
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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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|
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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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|
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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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} |
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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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|
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return vlan_vid_add(phy_dev, proto, vid); |
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} |
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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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|
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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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|
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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 |
|
* 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 ? : phy_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 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; |
|
} |
|
|
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static bool netif_is_ipvlan(const struct net_device *dev) |
|
{ |
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/* both ipvlan and ipvtap devices use the same netdev_ops */ |
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return dev->netdev_ops == &ipvlan_netdev_ops; |
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} |
|
|
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static int ipvlan_ethtool_get_link_ksettings(struct net_device *dev, |
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struct ethtool_link_ksettings *cmd) |
|
{ |
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const struct ipvl_dev *ipvlan = netdev_priv(dev); |
|
|
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return __ethtool_get_link_ksettings(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)); |
|
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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struct ipvl_dev *ipvlan = netdev_priv(dev); |
|
|
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ipvlan->msg_enable = value; |
|
} |
|
|
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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_link_ksettings = ipvlan_ethtool_get_link_ksettings, |
|
.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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static int ipvlan_nl_changelink(struct net_device *dev, |
|
struct nlattr *tb[], struct nlattr *data[], |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct ipvl_dev *ipvlan = netdev_priv(dev); |
|
struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); |
|
int err = 0; |
|
|
|
if (!data) |
|
return 0; |
|
if (!ns_capable(dev_net(ipvlan->phy_dev)->user_ns, CAP_NET_ADMIN)) |
|
return -EPERM; |
|
|
|
if (data[IFLA_IPVLAN_MODE]) { |
|
u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]); |
|
|
|
err = ipvlan_set_port_mode(port, nmode, extack); |
|
} |
|
|
|
if (!err && data[IFLA_IPVLAN_FLAGS]) { |
|
u16 flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]); |
|
|
|
if (flags & IPVLAN_F_PRIVATE) |
|
ipvlan_mark_private(port); |
|
else |
|
ipvlan_clear_private(port); |
|
|
|
if (flags & IPVLAN_F_VEPA) |
|
ipvlan_mark_vepa(port); |
|
else |
|
ipvlan_clear_vepa(port); |
|
} |
|
|
|
return err; |
|
} |
|
|
|
static size_t ipvlan_nl_getsize(const struct net_device *dev) |
|
{ |
|
return (0 |
|
+ nla_total_size(2) /* IFLA_IPVLAN_MODE */ |
|
+ nla_total_size(2) /* IFLA_IPVLAN_FLAGS */ |
|
); |
|
} |
|
|
|
static int ipvlan_nl_validate(struct nlattr *tb[], struct nlattr *data[], |
|
struct netlink_ext_ack *extack) |
|
{ |
|
if (!data) |
|
return 0; |
|
|
|
if (data[IFLA_IPVLAN_MODE]) { |
|
u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); |
|
|
|
if (mode >= IPVLAN_MODE_MAX) |
|
return -EINVAL; |
|
} |
|
if (data[IFLA_IPVLAN_FLAGS]) { |
|
u16 flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]); |
|
|
|
/* Only two bits are used at this moment. */ |
|
if (flags & ~(IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) |
|
return -EINVAL; |
|
/* Also both flags can't be active at the same time. */ |
|
if ((flags & (IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) == |
|
(IPVLAN_F_PRIVATE | IPVLAN_F_VEPA)) |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int ipvlan_nl_fillinfo(struct sk_buff *skb, |
|
const struct net_device *dev) |
|
{ |
|
struct ipvl_dev *ipvlan = netdev_priv(dev); |
|
struct ipvl_port *port = ipvlan_port_get_rtnl(ipvlan->phy_dev); |
|
int ret = -EINVAL; |
|
|
|
if (!port) |
|
goto err; |
|
|
|
ret = -EMSGSIZE; |
|
if (nla_put_u16(skb, IFLA_IPVLAN_MODE, port->mode)) |
|
goto err; |
|
if (nla_put_u16(skb, IFLA_IPVLAN_FLAGS, port->flags)) |
|
goto err; |
|
|
|
return 0; |
|
|
|
err: |
|
return ret; |
|
} |
|
|
|
int ipvlan_link_new(struct net *src_net, struct net_device *dev, |
|
struct nlattr *tb[], struct nlattr *data[], |
|
struct netlink_ext_ack *extack) |
|
{ |
|
struct ipvl_dev *ipvlan = netdev_priv(dev); |
|
struct ipvl_port *port; |
|
struct net_device *phy_dev; |
|
int err; |
|
u16 mode = IPVLAN_MODE_L3; |
|
|
|
if (!tb[IFLA_LINK]) |
|
return -EINVAL; |
|
|
|
phy_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
|
if (!phy_dev) |
|
return -ENODEV; |
|
|
|
if (netif_is_ipvlan(phy_dev)) { |
|
struct ipvl_dev *tmp = netdev_priv(phy_dev); |
|
|
|
phy_dev = tmp->phy_dev; |
|
if (!ns_capable(dev_net(phy_dev)->user_ns, CAP_NET_ADMIN)) |
|
return -EPERM; |
|
} else if (!netif_is_ipvlan_port(phy_dev)) { |
|
/* Exit early if the underlying link is invalid or busy */ |
|
if (phy_dev->type != ARPHRD_ETHER || |
|
phy_dev->flags & IFF_LOOPBACK) { |
|
netdev_err(phy_dev, |
|
"Master is either lo or non-ether device\n"); |
|
return -EINVAL; |
|
} |
|
|
|
if (netdev_is_rx_handler_busy(phy_dev)) { |
|
netdev_err(phy_dev, "Device is already in use.\n"); |
|
return -EBUSY; |
|
} |
|
} |
|
|
|
ipvlan->phy_dev = phy_dev; |
|
ipvlan->dev = dev; |
|
ipvlan->sfeatures = IPVLAN_FEATURES; |
|
if (!tb[IFLA_MTU]) |
|
ipvlan_adjust_mtu(ipvlan, phy_dev); |
|
INIT_LIST_HEAD(&ipvlan->addrs); |
|
spin_lock_init(&ipvlan->addrs_lock); |
|
|
|
/* 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_NO_RX_HANDLER; |
|
|
|
err = register_netdevice(dev); |
|
if (err < 0) |
|
return err; |
|
|
|
/* ipvlan_init() would have created the port, if required */ |
|
port = ipvlan_port_get_rtnl(phy_dev); |
|
ipvlan->port = port; |
|
|
|
/* If the port-id base is at the MAX value, then wrap it around and |
|
* begin from 0x1 again. This may be due to a busy system where lots |
|
* of slaves are getting created and deleted. |
|
*/ |
|
if (port->dev_id_start == 0xFFFE) |
|
port->dev_id_start = 0x1; |
|
|
|
/* Since L2 address is shared among all IPvlan slaves including |
|
* master, use unique 16 bit dev-ids to diffentiate among them. |
|
* Assign IDs between 0x1 and 0xFFFE (used by the master) to each |
|
* slave link [see addrconf_ifid_eui48()]. |
|
*/ |
|
err = ida_simple_get(&port->ida, port->dev_id_start, 0xFFFE, |
|
GFP_KERNEL); |
|
if (err < 0) |
|
err = ida_simple_get(&port->ida, 0x1, port->dev_id_start, |
|
GFP_KERNEL); |
|
if (err < 0) |
|
goto unregister_netdev; |
|
dev->dev_id = err; |
|
|
|
/* Increment id-base to the next slot for the future assignment */ |
|
port->dev_id_start = err + 1; |
|
|
|
err = netdev_upper_dev_link(phy_dev, dev, extack); |
|
if (err) |
|
goto remove_ida; |
|
|
|
/* Flags are per port and latest update overrides. User has |
|
* to be consistent in setting it just like the mode attribute. |
|
*/ |
|
if (data && data[IFLA_IPVLAN_FLAGS]) |
|
port->flags = nla_get_u16(data[IFLA_IPVLAN_FLAGS]); |
|
|
|
if (data && data[IFLA_IPVLAN_MODE]) |
|
mode = nla_get_u16(data[IFLA_IPVLAN_MODE]); |
|
|
|
err = ipvlan_set_port_mode(port, mode, extack); |
|
if (err) |
|
goto unlink_netdev; |
|
|
|
list_add_tail_rcu(&ipvlan->pnode, &port->ipvlans); |
|
netif_stacked_transfer_operstate(phy_dev, dev); |
|
return 0; |
|
|
|
unlink_netdev: |
|
netdev_upper_dev_unlink(phy_dev, dev); |
|
remove_ida: |
|
ida_simple_remove(&port->ida, dev->dev_id); |
|
unregister_netdev: |
|
unregister_netdevice(dev); |
|
return err; |
|
} |
|
EXPORT_SYMBOL_GPL(ipvlan_link_new); |
|
|
|
void ipvlan_link_delete(struct net_device *dev, struct list_head *head) |
|
{ |
|
struct ipvl_dev *ipvlan = netdev_priv(dev); |
|
struct ipvl_addr *addr, *next; |
|
|
|
spin_lock_bh(&ipvlan->addrs_lock); |
|
list_for_each_entry_safe(addr, next, &ipvlan->addrs, anode) { |
|
ipvlan_ht_addr_del(addr); |
|
list_del_rcu(&addr->anode); |
|
kfree_rcu(addr, rcu); |
|
} |
|
spin_unlock_bh(&ipvlan->addrs_lock); |
|
|
|
ida_simple_remove(&ipvlan->port->ida, dev->dev_id); |
|
list_del_rcu(&ipvlan->pnode); |
|
unregister_netdevice_queue(dev, head); |
|
netdev_upper_dev_unlink(ipvlan->phy_dev, dev); |
|
} |
|
EXPORT_SYMBOL_GPL(ipvlan_link_delete); |
|
|
|
void ipvlan_link_setup(struct net_device *dev) |
|
{ |
|
ether_setup(dev); |
|
|
|
dev->max_mtu = ETH_MAX_MTU; |
|
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->needs_free_netdev = true; |
|
dev->header_ops = &ipvlan_header_ops; |
|
dev->ethtool_ops = &ipvlan_ethtool_ops; |
|
} |
|
EXPORT_SYMBOL_GPL(ipvlan_link_setup); |
|
|
|
static const struct nla_policy ipvlan_nl_policy[IFLA_IPVLAN_MAX + 1] = |
|
{ |
|
[IFLA_IPVLAN_MODE] = { .type = NLA_U16 }, |
|
[IFLA_IPVLAN_FLAGS] = { .type = NLA_U16 }, |
|
}; |
|
|
|
static struct net *ipvlan_get_link_net(const struct net_device *dev) |
|
{ |
|
struct ipvl_dev *ipvlan = netdev_priv(dev); |
|
|
|
return dev_net(ipvlan->phy_dev); |
|
} |
|
|
|
static struct rtnl_link_ops ipvlan_link_ops = { |
|
.kind = "ipvlan", |
|
.priv_size = sizeof(struct ipvl_dev), |
|
|
|
.setup = ipvlan_link_setup, |
|
.newlink = ipvlan_link_new, |
|
.dellink = ipvlan_link_delete, |
|
.get_link_net = ipvlan_get_link_net, |
|
}; |
|
|
|
int ipvlan_link_register(struct rtnl_link_ops *ops) |
|
{ |
|
ops->get_size = ipvlan_nl_getsize; |
|
ops->policy = ipvlan_nl_policy; |
|
ops->validate = ipvlan_nl_validate; |
|
ops->fill_info = ipvlan_nl_fillinfo; |
|
ops->changelink = ipvlan_nl_changelink; |
|
ops->maxtype = IFLA_IPVLAN_MAX; |
|
return rtnl_link_register(ops); |
|
} |
|
EXPORT_SYMBOL_GPL(ipvlan_link_register); |
|
|
|
static int ipvlan_device_event(struct notifier_block *unused, |
|
unsigned long event, void *ptr) |
|
{ |
|
struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr); |
|
struct netdev_notifier_pre_changeaddr_info *prechaddr_info; |
|
struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
|
struct ipvl_dev *ipvlan, *next; |
|
struct ipvl_port *port; |
|
LIST_HEAD(lst_kill); |
|
int err; |
|
|
|
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_REGISTER: { |
|
struct net *oldnet, *newnet = dev_net(dev); |
|
|
|
oldnet = read_pnet(&port->pnet); |
|
if (net_eq(newnet, oldnet)) |
|
break; |
|
|
|
write_pnet(&port->pnet, newnet); |
|
|
|
ipvlan_migrate_l3s_hook(oldnet, newnet); |
|
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->gso_max_size = dev->gso_max_size; |
|
ipvlan->dev->gso_max_segs = dev->gso_max_segs; |
|
netdev_update_features(ipvlan->dev); |
|
} |
|
break; |
|
|
|
case NETDEV_CHANGEMTU: |
|
list_for_each_entry(ipvlan, &port->ipvlans, pnode) |
|
ipvlan_adjust_mtu(ipvlan, dev); |
|
break; |
|
|
|
case NETDEV_PRE_CHANGEADDR: |
|
prechaddr_info = ptr; |
|
list_for_each_entry(ipvlan, &port->ipvlans, pnode) { |
|
err = dev_pre_changeaddr_notify(ipvlan->dev, |
|
prechaddr_info->dev_addr, |
|
extack); |
|
if (err) |
|
return notifier_from_errno(err); |
|
} |
|
break; |
|
|
|
case NETDEV_CHANGEADDR: |
|
list_for_each_entry(ipvlan, &port->ipvlans, pnode) { |
|
ether_addr_copy(ipvlan->dev->dev_addr, dev->dev_addr); |
|
call_netdevice_notifiers(NETDEV_CHANGEADDR, ipvlan->dev); |
|
} |
|
break; |
|
|
|
case NETDEV_PRE_TYPE_CHANGE: |
|
/* Forbid underlying device to change its type. */ |
|
return NOTIFY_BAD; |
|
} |
|
return NOTIFY_DONE; |
|
} |
|
|
|
/* the caller must held the addrs lock */ |
|
static int ipvlan_add_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6) |
|
{ |
|
struct ipvl_addr *addr; |
|
|
|
addr = kzalloc(sizeof(struct ipvl_addr), GFP_ATOMIC); |
|
if (!addr) |
|
return -ENOMEM; |
|
|
|
addr->master = ipvlan; |
|
if (!is_v6) { |
|
memcpy(&addr->ip4addr, iaddr, sizeof(struct in_addr)); |
|
addr->atype = IPVL_IPV4; |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
} else { |
|
memcpy(&addr->ip6addr, iaddr, sizeof(struct in6_addr)); |
|
addr->atype = IPVL_IPV6; |
|
#endif |
|
} |
|
|
|
list_add_tail_rcu(&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_addr(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6) |
|
{ |
|
struct ipvl_addr *addr; |
|
|
|
spin_lock_bh(&ipvlan->addrs_lock); |
|
addr = ipvlan_find_addr(ipvlan, iaddr, is_v6); |
|
if (!addr) { |
|
spin_unlock_bh(&ipvlan->addrs_lock); |
|
return; |
|
} |
|
|
|
ipvlan_ht_addr_del(addr); |
|
list_del_rcu(&addr->anode); |
|
spin_unlock_bh(&ipvlan->addrs_lock); |
|
kfree_rcu(addr, rcu); |
|
} |
|
|
|
static bool ipvlan_is_valid_dev(const struct net_device *dev) |
|
{ |
|
struct ipvl_dev *ipvlan = netdev_priv(dev); |
|
|
|
if (!netif_is_ipvlan(dev)) |
|
return false; |
|
|
|
if (!ipvlan || !ipvlan->port) |
|
return false; |
|
|
|
return true; |
|
} |
|
|
|
#if IS_ENABLED(CONFIG_IPV6) |
|
static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) |
|
{ |
|
int ret = -EINVAL; |
|
|
|
spin_lock_bh(&ipvlan->addrs_lock); |
|
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); |
|
else |
|
ret = ipvlan_add_addr(ipvlan, ip6_addr, true); |
|
spin_unlock_bh(&ipvlan->addrs_lock); |
|
return ret; |
|
} |
|
|
|
static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr) |
|
{ |
|
return ipvlan_del_addr(ipvlan, ip6_addr, true); |
|
} |
|
|
|
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); |
|
|
|
if (!ipvlan_is_valid_dev(dev)) |
|
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_addr6_validator_event(struct notifier_block *unused, |
|
unsigned long event, void *ptr) |
|
{ |
|
struct in6_validator_info *i6vi = (struct in6_validator_info *)ptr; |
|
struct net_device *dev = (struct net_device *)i6vi->i6vi_dev->dev; |
|
struct ipvl_dev *ipvlan = netdev_priv(dev); |
|
|
|
if (!ipvlan_is_valid_dev(dev)) |
|
return NOTIFY_DONE; |
|
|
|
switch (event) { |
|
case NETDEV_UP: |
|
if (ipvlan_addr_busy(ipvlan->port, &i6vi->i6vi_addr, true)) { |
|
NL_SET_ERR_MSG(i6vi->extack, |
|
"Address already assigned to an ipvlan device"); |
|
return notifier_from_errno(-EADDRINUSE); |
|
} |
|
break; |
|
} |
|
|
|
return NOTIFY_OK; |
|
} |
|
#endif |
|
|
|
static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) |
|
{ |
|
int ret = -EINVAL; |
|
|
|
spin_lock_bh(&ipvlan->addrs_lock); |
|
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); |
|
else |
|
ret = ipvlan_add_addr(ipvlan, ip4_addr, false); |
|
spin_unlock_bh(&ipvlan->addrs_lock); |
|
return ret; |
|
} |
|
|
|
static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr) |
|
{ |
|
return ipvlan_del_addr(ipvlan, ip4_addr, false); |
|
} |
|
|
|
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 (!ipvlan_is_valid_dev(dev)) |
|
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 int ipvlan_addr4_validator_event(struct notifier_block *unused, |
|
unsigned long event, void *ptr) |
|
{ |
|
struct in_validator_info *ivi = (struct in_validator_info *)ptr; |
|
struct net_device *dev = (struct net_device *)ivi->ivi_dev->dev; |
|
struct ipvl_dev *ipvlan = netdev_priv(dev); |
|
|
|
if (!ipvlan_is_valid_dev(dev)) |
|
return NOTIFY_DONE; |
|
|
|
switch (event) { |
|
case NETDEV_UP: |
|
if (ipvlan_addr_busy(ipvlan->port, &ivi->ivi_addr, false)) { |
|
NL_SET_ERR_MSG(ivi->extack, |
|
"Address already assigned to an ipvlan device"); |
|
return notifier_from_errno(-EADDRINUSE); |
|
} |
|
break; |
|
} |
|
|
|
return NOTIFY_OK; |
|
} |
|
|
|
static struct notifier_block ipvlan_addr4_notifier_block __read_mostly = { |
|
.notifier_call = ipvlan_addr4_event, |
|
}; |
|
|
|
static struct notifier_block ipvlan_addr4_vtor_notifier_block __read_mostly = { |
|
.notifier_call = ipvlan_addr4_validator_event, |
|
}; |
|
|
|
static struct notifier_block ipvlan_notifier_block __read_mostly = { |
|
.notifier_call = ipvlan_device_event, |
|
}; |
|
|
|
#if IS_ENABLED(CONFIG_IPV6) |
|
static struct notifier_block ipvlan_addr6_notifier_block __read_mostly = { |
|
.notifier_call = ipvlan_addr6_event, |
|
}; |
|
|
|
static struct notifier_block ipvlan_addr6_vtor_notifier_block __read_mostly = { |
|
.notifier_call = ipvlan_addr6_validator_event, |
|
}; |
|
#endif |
|
|
|
static int __init ipvlan_init_module(void) |
|
{ |
|
int err; |
|
|
|
ipvlan_init_secret(); |
|
register_netdevice_notifier(&ipvlan_notifier_block); |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
register_inet6addr_notifier(&ipvlan_addr6_notifier_block); |
|
register_inet6addr_validator_notifier( |
|
&ipvlan_addr6_vtor_notifier_block); |
|
#endif |
|
register_inetaddr_notifier(&ipvlan_addr4_notifier_block); |
|
register_inetaddr_validator_notifier(&ipvlan_addr4_vtor_notifier_block); |
|
|
|
err = ipvlan_l3s_init(); |
|
if (err < 0) |
|
goto error; |
|
|
|
err = ipvlan_link_register(&ipvlan_link_ops); |
|
if (err < 0) { |
|
ipvlan_l3s_cleanup(); |
|
goto error; |
|
} |
|
|
|
return 0; |
|
error: |
|
unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); |
|
unregister_inetaddr_validator_notifier( |
|
&ipvlan_addr4_vtor_notifier_block); |
|
#if IS_ENABLED(CONFIG_IPV6) |
|
unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); |
|
unregister_inet6addr_validator_notifier( |
|
&ipvlan_addr6_vtor_notifier_block); |
|
#endif |
|
unregister_netdevice_notifier(&ipvlan_notifier_block); |
|
return err; |
|
} |
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|
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static void __exit ipvlan_cleanup_module(void) |
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{ |
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rtnl_link_unregister(&ipvlan_link_ops); |
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ipvlan_l3s_cleanup(); |
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unregister_netdevice_notifier(&ipvlan_notifier_block); |
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unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block); |
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unregister_inetaddr_validator_notifier( |
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&ipvlan_addr4_vtor_notifier_block); |
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#if IS_ENABLED(CONFIG_IPV6) |
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unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block); |
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unregister_inet6addr_validator_notifier( |
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&ipvlan_addr6_vtor_notifier_block); |
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#endif |
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} |
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|
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module_init(ipvlan_init_module); |
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module_exit(ipvlan_cleanup_module); |
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|
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MODULE_LICENSE("GPL"); |
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MODULE_AUTHOR("Mahesh Bandewar <[email protected]>"); |
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MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs"); |
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MODULE_ALIAS_RTNL_LINK("ipvlan");
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