![David S. Miller](/assets/img/avatar_default.png)
- bump version strings, by Simon Wunderlich - Code and Style cleanups, by Sven Eckelmann (5 patches) - Remove an unneccessary memset, by Tobias Klauser - DAT and BLA optimizations for various corner cases, by Andreas Pape (5 patches) - forward/rebroadcast packet restructuring, by Linus Luessing (2 patches) - ethtool cleanup and remove unncessary code, by Sven Eckelmann (4 patches) - use net_device_stats from net_device instead of private copy, by Tobias Klauser -----BEGIN PGP SIGNATURE----- iQJKBAABCgA0FiEE1ilQI7G+y+fdhnrfoSvjmEKSnqEFAljmSyUWHHN3QHNpbW9u d3VuZGVybGljaC5kZQAKCRChK+OYQpKeodYrD/4xzy0IGyF7vb/q3Nj0EeioldL8 /8j9G14RfnlQaTIGxHEYz6oo1A6+cuH+t/4N+ilPFv6F0bBXG3GsWYrBCYLhVKwu 2BQcoXC4ysdVqdrc7UDG5JY/t+n7JwhIcBw6kta9mt5fFVmPI/KHpefeaiUkdJb4 23YkYsOSPVcD/Yv6+uiyfOG8FFxDrqFyn1uHpE1K5/05jLhJJ8S7nODNsitMOv2m EMLNJwTstSK/boPoxIpSCraxZGgpb0rt0K6HiBiNq0GyGRCtz0pxBpDOikVwTB62 hy2aW3R59baGHPxA47oOAF60cJUlTj4pYxmsGwd9hzeJkw4eMvcYJzW6/2PXB3bj e4xBT5T+Y3bZDFdK+jW4hOCHLGC6gpwWSs5P6YDhCalhJ/meV75ef03ruIvGhVh9 qOhuSMAnqCsoJ8FMpLT3GMkSGSkOXEhL8iF/r3/PR/q0cPCquQnMjQg+Kqp7+eb6 iNHwSA0dqUiBB7KplS8KTcAxre8KlmNmGr544KY9eK0BZZ9BOleT2a2W7+QSTCKx o8fl44HmwhgxQ+mYJwG1kEfgmTRhvrOmr6KP9qTkn5lAoIGXspwBo/bA5+cyLJOU ewsx8JG5gfT2yUFB1HqdZon+rkW6KKopdHL+BL3BvQRYTUojxmr0lJBrMWg7GNYv 2lwrasmHxhWbF2L4xg== =r99K -----END PGP SIGNATURE----- Merge tag 'batadv-next-for-davem-20170406' of git://git.open-mesh.org/linux-merge Simon Wunderlich says: ==================== This feature/cleanup patchset includes the following patches: - bump version strings, by Simon Wunderlich - Code and Style cleanups, by Sven Eckelmann (5 patches) - Remove an unneccessary memset, by Tobias Klauser - DAT and BLA optimizations for various corner cases, by Andreas Pape (5 patches) - forward/rebroadcast packet restructuring, by Linus Luessing (2 patches) - ethtool cleanup and remove unncessary code, by Sven Eckelmann (4 patches) - use net_device_stats from net_device instead of private copy, by Tobias Klauser ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
1155 lines
32 KiB
C
1155 lines
32 KiB
C
/* Copyright (C) 2007-2017 B.A.T.M.A.N. contributors:
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*
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* Marek Lindner, Simon Wunderlich
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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 version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "soft-interface.h"
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#include "main.h"
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#include <linux/atomic.h>
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#include <linux/byteorder/generic.h>
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#include <linux/cache.h>
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#include <linux/compiler.h>
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#include <linux/cpumask.h>
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#include <linux/errno.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <linux/fs.h>
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#include <linux/if_ether.h>
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#include <linux/if_vlan.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/kref.h>
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#include <linux/list.h>
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#include <linux/lockdep.h>
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#include <linux/netdevice.h>
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#include <linux/percpu.h>
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#include <linux/printk.h>
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#include <linux/random.h>
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#include <linux/rculist.h>
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#include <linux/rcupdate.h>
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#include <linux/rtnetlink.h>
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#include <linux/skbuff.h>
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#include <linux/slab.h>
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#include <linux/socket.h>
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#include <linux/spinlock.h>
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#include <linux/stddef.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include "bat_algo.h"
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#include "bridge_loop_avoidance.h"
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#include "debugfs.h"
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#include "distributed-arp-table.h"
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#include "gateway_client.h"
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#include "gateway_common.h"
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#include "hard-interface.h"
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#include "multicast.h"
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#include "network-coding.h"
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#include "originator.h"
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#include "packet.h"
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#include "send.h"
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#include "sysfs.h"
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#include "translation-table.h"
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int batadv_skb_head_push(struct sk_buff *skb, unsigned int len)
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{
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int result;
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/* TODO: We must check if we can release all references to non-payload
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* data using skb_header_release in our skbs to allow skb_cow_header to
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* work optimally. This means that those skbs are not allowed to read
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* or write any data which is before the current position of skb->data
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* after that call and thus allow other skbs with the same data buffer
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* to write freely in that area.
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*/
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result = skb_cow_head(skb, len);
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if (result < 0)
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return result;
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skb_push(skb, len);
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return 0;
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}
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static int batadv_interface_open(struct net_device *dev)
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{
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netif_start_queue(dev);
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return 0;
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}
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static int batadv_interface_release(struct net_device *dev)
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{
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netif_stop_queue(dev);
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return 0;
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}
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/**
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* batadv_sum_counter - Sum the cpu-local counters for index 'idx'
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* @bat_priv: the bat priv with all the soft interface information
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* @idx: index of counter to sum up
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*
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* Return: sum of all cpu-local counters
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*/
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static u64 batadv_sum_counter(struct batadv_priv *bat_priv, size_t idx)
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{
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u64 *counters, sum = 0;
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int cpu;
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for_each_possible_cpu(cpu) {
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counters = per_cpu_ptr(bat_priv->bat_counters, cpu);
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sum += counters[idx];
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}
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return sum;
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}
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static struct net_device_stats *batadv_interface_stats(struct net_device *dev)
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{
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struct batadv_priv *bat_priv = netdev_priv(dev);
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struct net_device_stats *stats = &dev->stats;
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stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX);
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stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES);
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stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED);
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stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX);
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stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES);
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return stats;
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}
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static int batadv_interface_set_mac_addr(struct net_device *dev, void *p)
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{
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struct batadv_priv *bat_priv = netdev_priv(dev);
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struct batadv_softif_vlan *vlan;
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struct sockaddr *addr = p;
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u8 old_addr[ETH_ALEN];
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if (!is_valid_ether_addr(addr->sa_data))
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return -EADDRNOTAVAIL;
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ether_addr_copy(old_addr, dev->dev_addr);
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ether_addr_copy(dev->dev_addr, addr->sa_data);
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/* only modify transtable if it has been initialized before */
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if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)
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return 0;
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rcu_read_lock();
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hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
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batadv_tt_local_remove(bat_priv, old_addr, vlan->vid,
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"mac address changed", false);
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batadv_tt_local_add(dev, addr->sa_data, vlan->vid,
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BATADV_NULL_IFINDEX, BATADV_NO_MARK);
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}
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rcu_read_unlock();
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return 0;
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}
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static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu)
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{
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/* check ranges */
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if ((new_mtu < 68) || (new_mtu > batadv_hardif_min_mtu(dev)))
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return -EINVAL;
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dev->mtu = new_mtu;
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return 0;
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}
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/**
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* batadv_interface_set_rx_mode - set the rx mode of a device
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* @dev: registered network device to modify
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*
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* We do not actually need to set any rx filters for the virtual batman
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* soft interface. However a dummy handler enables a user to set static
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* multicast listeners for instance.
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*/
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static void batadv_interface_set_rx_mode(struct net_device *dev)
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{
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}
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static int batadv_interface_tx(struct sk_buff *skb,
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struct net_device *soft_iface)
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{
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struct ethhdr *ethhdr;
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struct batadv_priv *bat_priv = netdev_priv(soft_iface);
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struct batadv_hard_iface *primary_if = NULL;
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struct batadv_bcast_packet *bcast_packet;
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static const u8 stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00,
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0x00, 0x00};
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static const u8 ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00,
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0x00, 0x00};
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enum batadv_dhcp_recipient dhcp_rcp = BATADV_DHCP_NO;
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u8 *dst_hint = NULL, chaddr[ETH_ALEN];
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struct vlan_ethhdr *vhdr;
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unsigned int header_len = 0;
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int data_len = skb->len, ret;
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unsigned long brd_delay = 1;
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bool do_bcast = false, client_added;
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unsigned short vid;
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u32 seqno;
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int gw_mode;
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enum batadv_forw_mode forw_mode;
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struct batadv_orig_node *mcast_single_orig = NULL;
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int network_offset = ETH_HLEN;
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if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)
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goto dropped;
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/* reset control block to avoid left overs from previous users */
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memset(skb->cb, 0, sizeof(struct batadv_skb_cb));
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netif_trans_update(soft_iface);
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vid = batadv_get_vid(skb, 0);
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ethhdr = eth_hdr(skb);
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switch (ntohs(ethhdr->h_proto)) {
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case ETH_P_8021Q:
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vhdr = vlan_eth_hdr(skb);
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/* drop batman-in-batman packets to prevent loops */
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if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) {
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network_offset += VLAN_HLEN;
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break;
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}
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/* fall through */
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case ETH_P_BATMAN:
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goto dropped;
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}
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skb_set_network_header(skb, network_offset);
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if (batadv_bla_tx(bat_priv, skb, vid))
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goto dropped;
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/* skb->data might have been reallocated by batadv_bla_tx() */
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ethhdr = eth_hdr(skb);
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/* Register the client MAC in the transtable */
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if (!is_multicast_ether_addr(ethhdr->h_source) &&
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!batadv_bla_is_loopdetect_mac(ethhdr->h_source)) {
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client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source,
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vid, skb->skb_iif,
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skb->mark);
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if (!client_added)
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goto dropped;
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}
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/* don't accept stp packets. STP does not help in meshes.
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* better use the bridge loop avoidance ...
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*
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* The same goes for ECTP sent at least by some Cisco Switches,
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* it might confuse the mesh when used with bridge loop avoidance.
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*/
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if (batadv_compare_eth(ethhdr->h_dest, stp_addr))
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goto dropped;
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if (batadv_compare_eth(ethhdr->h_dest, ectp_addr))
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goto dropped;
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gw_mode = atomic_read(&bat_priv->gw.mode);
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if (is_multicast_ether_addr(ethhdr->h_dest)) {
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/* if gw mode is off, broadcast every packet */
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if (gw_mode == BATADV_GW_MODE_OFF) {
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do_bcast = true;
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goto send;
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}
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dhcp_rcp = batadv_gw_dhcp_recipient_get(skb, &header_len,
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chaddr);
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/* skb->data may have been modified by
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* batadv_gw_dhcp_recipient_get()
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*/
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ethhdr = eth_hdr(skb);
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/* if gw_mode is on, broadcast any non-DHCP message.
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* All the DHCP packets are going to be sent as unicast
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*/
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if (dhcp_rcp == BATADV_DHCP_NO) {
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do_bcast = true;
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goto send;
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}
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if (dhcp_rcp == BATADV_DHCP_TO_CLIENT)
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dst_hint = chaddr;
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else if ((gw_mode == BATADV_GW_MODE_SERVER) &&
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(dhcp_rcp == BATADV_DHCP_TO_SERVER))
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/* gateways should not forward any DHCP message if
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* directed to a DHCP server
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*/
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goto dropped;
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send:
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if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) {
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forw_mode = batadv_mcast_forw_mode(bat_priv, skb,
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&mcast_single_orig);
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if (forw_mode == BATADV_FORW_NONE)
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goto dropped;
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if (forw_mode == BATADV_FORW_SINGLE)
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do_bcast = false;
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}
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}
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batadv_skb_set_priority(skb, 0);
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/* ethernet packet should be broadcasted */
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if (do_bcast) {
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primary_if = batadv_primary_if_get_selected(bat_priv);
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if (!primary_if)
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goto dropped;
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/* in case of ARP request, we do not immediately broadcasti the
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* packet, instead we first wait for DAT to try to retrieve the
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* correct ARP entry
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*/
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if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb))
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brd_delay = msecs_to_jiffies(ARP_REQ_DELAY);
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if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0)
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goto dropped;
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bcast_packet = (struct batadv_bcast_packet *)skb->data;
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bcast_packet->version = BATADV_COMPAT_VERSION;
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bcast_packet->ttl = BATADV_TTL;
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/* batman packet type: broadcast */
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bcast_packet->packet_type = BATADV_BCAST;
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bcast_packet->reserved = 0;
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/* hw address of first interface is the orig mac because only
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* this mac is known throughout the mesh
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*/
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ether_addr_copy(bcast_packet->orig,
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primary_if->net_dev->dev_addr);
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/* set broadcast sequence number */
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seqno = atomic_inc_return(&bat_priv->bcast_seqno);
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bcast_packet->seqno = htonl(seqno);
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batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay, true);
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/* a copy is stored in the bcast list, therefore removing
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* the original skb.
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*/
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consume_skb(skb);
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/* unicast packet */
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} else {
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/* DHCP packets going to a server will use the GW feature */
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if (dhcp_rcp == BATADV_DHCP_TO_SERVER) {
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ret = batadv_gw_out_of_range(bat_priv, skb);
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if (ret)
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goto dropped;
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ret = batadv_send_skb_via_gw(bat_priv, skb, vid);
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} else if (mcast_single_orig) {
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ret = batadv_send_skb_unicast(bat_priv, skb,
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BATADV_UNICAST, 0,
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mcast_single_orig, vid);
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} else {
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if (batadv_dat_snoop_outgoing_arp_request(bat_priv,
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skb))
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goto dropped;
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batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb);
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ret = batadv_send_skb_via_tt(bat_priv, skb, dst_hint,
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vid);
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}
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if (ret != NET_XMIT_SUCCESS)
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goto dropped_freed;
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}
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batadv_inc_counter(bat_priv, BATADV_CNT_TX);
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batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len);
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goto end;
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dropped:
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kfree_skb(skb);
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dropped_freed:
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batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED);
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end:
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if (mcast_single_orig)
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batadv_orig_node_put(mcast_single_orig);
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if (primary_if)
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batadv_hardif_put(primary_if);
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return NETDEV_TX_OK;
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}
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/**
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* batadv_interface_rx - receive ethernet frame on local batman-adv interface
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* @soft_iface: local interface which will receive the ethernet frame
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* @skb: ethernet frame for @soft_iface
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* @hdr_size: size of already parsed batman-adv header
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* @orig_node: originator from which the batman-adv packet was sent
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*
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* Sends a ethernet frame to the receive path of the local @soft_iface.
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* skb->data has still point to the batman-adv header with the size @hdr_size.
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* The caller has to have parsed this header already and made sure that at least
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* @hdr_size bytes are still available for pull in @skb.
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*
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* The packet may still get dropped. This can happen when the encapsulated
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* ethernet frame is invalid or contains again an batman-adv packet. Also
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* unicast packets will be dropped directly when it was sent between two
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* isolated clients.
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*/
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void batadv_interface_rx(struct net_device *soft_iface,
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struct sk_buff *skb, int hdr_size,
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struct batadv_orig_node *orig_node)
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{
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struct batadv_bcast_packet *batadv_bcast_packet;
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struct batadv_priv *bat_priv = netdev_priv(soft_iface);
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struct vlan_ethhdr *vhdr;
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struct ethhdr *ethhdr;
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unsigned short vid;
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bool is_bcast;
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|
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batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data;
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is_bcast = (batadv_bcast_packet->packet_type == BATADV_BCAST);
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|
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skb_pull_rcsum(skb, hdr_size);
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|
skb_reset_mac_header(skb);
|
|
|
|
/* clean the netfilter state now that the batman-adv header has been
|
|
* removed
|
|
*/
|
|
nf_reset(skb);
|
|
|
|
if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
|
|
goto dropped;
|
|
|
|
vid = batadv_get_vid(skb, 0);
|
|
ethhdr = eth_hdr(skb);
|
|
|
|
switch (ntohs(ethhdr->h_proto)) {
|
|
case ETH_P_8021Q:
|
|
if (!pskb_may_pull(skb, VLAN_ETH_HLEN))
|
|
goto dropped;
|
|
|
|
vhdr = (struct vlan_ethhdr *)skb->data;
|
|
|
|
/* drop batman-in-batman packets to prevent loops */
|
|
if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN))
|
|
break;
|
|
|
|
/* fall through */
|
|
case ETH_P_BATMAN:
|
|
goto dropped;
|
|
}
|
|
|
|
/* skb->dev & skb->pkt_type are set here */
|
|
skb->protocol = eth_type_trans(skb, soft_iface);
|
|
|
|
/* should not be necessary anymore as we use skb_pull_rcsum()
|
|
* TODO: please verify this and remove this TODO
|
|
* -- Dec 21st 2009, Simon Wunderlich
|
|
*/
|
|
|
|
/* skb->ip_summed = CHECKSUM_UNNECESSARY; */
|
|
|
|
batadv_inc_counter(bat_priv, BATADV_CNT_RX);
|
|
batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES,
|
|
skb->len + ETH_HLEN);
|
|
|
|
/* Let the bridge loop avoidance check the packet. If will
|
|
* not handle it, we can safely push it up.
|
|
*/
|
|
if (batadv_bla_rx(bat_priv, skb, vid, is_bcast))
|
|
goto out;
|
|
|
|
if (orig_node)
|
|
batadv_tt_add_temporary_global_entry(bat_priv, orig_node,
|
|
ethhdr->h_source, vid);
|
|
|
|
if (is_multicast_ether_addr(ethhdr->h_dest)) {
|
|
/* set the mark on broadcast packets if AP isolation is ON and
|
|
* the packet is coming from an "isolated" client
|
|
*/
|
|
if (batadv_vlan_ap_isola_get(bat_priv, vid) &&
|
|
batadv_tt_global_is_isolated(bat_priv, ethhdr->h_source,
|
|
vid)) {
|
|
/* save bits in skb->mark not covered by the mask and
|
|
* apply the mark on the rest
|
|
*/
|
|
skb->mark &= ~bat_priv->isolation_mark_mask;
|
|
skb->mark |= bat_priv->isolation_mark;
|
|
}
|
|
} else if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source,
|
|
ethhdr->h_dest, vid)) {
|
|
goto dropped;
|
|
}
|
|
|
|
netif_rx(skb);
|
|
goto out;
|
|
|
|
dropped:
|
|
kfree_skb(skb);
|
|
out:
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* batadv_softif_vlan_release - release vlan from lists and queue for free after
|
|
* rcu grace period
|
|
* @ref: kref pointer of the vlan object
|
|
*/
|
|
static void batadv_softif_vlan_release(struct kref *ref)
|
|
{
|
|
struct batadv_softif_vlan *vlan;
|
|
|
|
vlan = container_of(ref, struct batadv_softif_vlan, refcount);
|
|
|
|
spin_lock_bh(&vlan->bat_priv->softif_vlan_list_lock);
|
|
hlist_del_rcu(&vlan->list);
|
|
spin_unlock_bh(&vlan->bat_priv->softif_vlan_list_lock);
|
|
|
|
kfree_rcu(vlan, rcu);
|
|
}
|
|
|
|
/**
|
|
* batadv_softif_vlan_put - decrease the vlan object refcounter and
|
|
* possibly release it
|
|
* @vlan: the vlan object to release
|
|
*/
|
|
void batadv_softif_vlan_put(struct batadv_softif_vlan *vlan)
|
|
{
|
|
if (!vlan)
|
|
return;
|
|
|
|
kref_put(&vlan->refcount, batadv_softif_vlan_release);
|
|
}
|
|
|
|
/**
|
|
* batadv_softif_vlan_get - get the vlan object for a specific vid
|
|
* @bat_priv: the bat priv with all the soft interface information
|
|
* @vid: the identifier of the vlan object to retrieve
|
|
*
|
|
* Return: the private data of the vlan matching the vid passed as argument or
|
|
* NULL otherwise. The refcounter of the returned object is incremented by 1.
|
|
*/
|
|
struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv,
|
|
unsigned short vid)
|
|
{
|
|
struct batadv_softif_vlan *vlan_tmp, *vlan = NULL;
|
|
|
|
rcu_read_lock();
|
|
hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) {
|
|
if (vlan_tmp->vid != vid)
|
|
continue;
|
|
|
|
if (!kref_get_unless_zero(&vlan_tmp->refcount))
|
|
continue;
|
|
|
|
vlan = vlan_tmp;
|
|
break;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return vlan;
|
|
}
|
|
|
|
/**
|
|
* batadv_softif_create_vlan - allocate the needed resources for a new vlan
|
|
* @bat_priv: the bat priv with all the soft interface information
|
|
* @vid: the VLAN identifier
|
|
*
|
|
* Return: 0 on success, a negative error otherwise.
|
|
*/
|
|
int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid)
|
|
{
|
|
struct batadv_softif_vlan *vlan;
|
|
int err;
|
|
|
|
vlan = batadv_softif_vlan_get(bat_priv, vid);
|
|
if (vlan) {
|
|
batadv_softif_vlan_put(vlan);
|
|
return -EEXIST;
|
|
}
|
|
|
|
vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
|
|
if (!vlan)
|
|
return -ENOMEM;
|
|
|
|
vlan->bat_priv = bat_priv;
|
|
vlan->vid = vid;
|
|
kref_init(&vlan->refcount);
|
|
|
|
atomic_set(&vlan->ap_isolation, 0);
|
|
|
|
err = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan);
|
|
if (err) {
|
|
kfree(vlan);
|
|
return err;
|
|
}
|
|
|
|
spin_lock_bh(&bat_priv->softif_vlan_list_lock);
|
|
kref_get(&vlan->refcount);
|
|
hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list);
|
|
spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
|
|
|
|
/* add a new TT local entry. This one will be marked with the NOPURGE
|
|
* flag
|
|
*/
|
|
batadv_tt_local_add(bat_priv->soft_iface,
|
|
bat_priv->soft_iface->dev_addr, vid,
|
|
BATADV_NULL_IFINDEX, BATADV_NO_MARK);
|
|
|
|
/* don't return reference to new softif_vlan */
|
|
batadv_softif_vlan_put(vlan);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* batadv_softif_destroy_vlan - remove and destroy a softif_vlan object
|
|
* @bat_priv: the bat priv with all the soft interface information
|
|
* @vlan: the object to remove
|
|
*/
|
|
static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv,
|
|
struct batadv_softif_vlan *vlan)
|
|
{
|
|
/* explicitly remove the associated TT local entry because it is marked
|
|
* with the NOPURGE flag
|
|
*/
|
|
batadv_tt_local_remove(bat_priv, bat_priv->soft_iface->dev_addr,
|
|
vlan->vid, "vlan interface destroyed", false);
|
|
|
|
batadv_sysfs_del_vlan(bat_priv, vlan);
|
|
batadv_softif_vlan_put(vlan);
|
|
}
|
|
|
|
/**
|
|
* batadv_interface_add_vid - ndo_add_vid API implementation
|
|
* @dev: the netdev of the mesh interface
|
|
* @proto: protocol of the the vlan id
|
|
* @vid: identifier of the new vlan
|
|
*
|
|
* Set up all the internal structures for handling the new vlan on top of the
|
|
* mesh interface
|
|
*
|
|
* Return: 0 on success or a negative error code in case of failure.
|
|
*/
|
|
static int batadv_interface_add_vid(struct net_device *dev, __be16 proto,
|
|
unsigned short vid)
|
|
{
|
|
struct batadv_priv *bat_priv = netdev_priv(dev);
|
|
struct batadv_softif_vlan *vlan;
|
|
int ret;
|
|
|
|
/* only 802.1Q vlans are supported.
|
|
* batman-adv does not know how to handle other types
|
|
*/
|
|
if (proto != htons(ETH_P_8021Q))
|
|
return -EINVAL;
|
|
|
|
vid |= BATADV_VLAN_HAS_TAG;
|
|
|
|
/* if a new vlan is getting created and it already exists, it means that
|
|
* it was not deleted yet. batadv_softif_vlan_get() increases the
|
|
* refcount in order to revive the object.
|
|
*
|
|
* if it does not exist then create it.
|
|
*/
|
|
vlan = batadv_softif_vlan_get(bat_priv, vid);
|
|
if (!vlan)
|
|
return batadv_softif_create_vlan(bat_priv, vid);
|
|
|
|
/* recreate the sysfs object if it was already destroyed (and it should
|
|
* be since we received a kill_vid() for this vlan
|
|
*/
|
|
if (!vlan->kobj) {
|
|
ret = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan);
|
|
if (ret) {
|
|
batadv_softif_vlan_put(vlan);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* add a new TT local entry. This one will be marked with the NOPURGE
|
|
* flag. This must be added again, even if the vlan object already
|
|
* exists, because the entry was deleted by kill_vid()
|
|
*/
|
|
batadv_tt_local_add(bat_priv->soft_iface,
|
|
bat_priv->soft_iface->dev_addr, vid,
|
|
BATADV_NULL_IFINDEX, BATADV_NO_MARK);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* batadv_interface_kill_vid - ndo_kill_vid API implementation
|
|
* @dev: the netdev of the mesh interface
|
|
* @proto: protocol of the the vlan id
|
|
* @vid: identifier of the deleted vlan
|
|
*
|
|
* Destroy all the internal structures used to handle the vlan identified by vid
|
|
* on top of the mesh interface
|
|
*
|
|
* Return: 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q
|
|
* or -ENOENT if the specified vlan id wasn't registered.
|
|
*/
|
|
static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto,
|
|
unsigned short vid)
|
|
{
|
|
struct batadv_priv *bat_priv = netdev_priv(dev);
|
|
struct batadv_softif_vlan *vlan;
|
|
|
|
/* only 802.1Q vlans are supported. batman-adv does not know how to
|
|
* handle other types
|
|
*/
|
|
if (proto != htons(ETH_P_8021Q))
|
|
return -EINVAL;
|
|
|
|
vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG);
|
|
if (!vlan)
|
|
return -ENOENT;
|
|
|
|
batadv_softif_destroy_vlan(bat_priv, vlan);
|
|
|
|
/* finally free the vlan object */
|
|
batadv_softif_vlan_put(vlan);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* batman-adv network devices have devices nesting below it and are a special
|
|
* "super class" of normal network devices; split their locks off into a
|
|
* separate class since they always nest.
|
|
*/
|
|
static struct lock_class_key batadv_netdev_xmit_lock_key;
|
|
static struct lock_class_key batadv_netdev_addr_lock_key;
|
|
|
|
/**
|
|
* batadv_set_lockdep_class_one - Set lockdep class for a single tx queue
|
|
* @dev: device which owns the tx queue
|
|
* @txq: tx queue to modify
|
|
* @_unused: always NULL
|
|
*/
|
|
static void batadv_set_lockdep_class_one(struct net_device *dev,
|
|
struct netdev_queue *txq,
|
|
void *_unused)
|
|
{
|
|
lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key);
|
|
}
|
|
|
|
/**
|
|
* batadv_set_lockdep_class - Set txq and addr_list lockdep class
|
|
* @dev: network device to modify
|
|
*/
|
|
static void batadv_set_lockdep_class(struct net_device *dev)
|
|
{
|
|
lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key);
|
|
netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL);
|
|
}
|
|
|
|
/**
|
|
* batadv_softif_init_late - late stage initialization of soft interface
|
|
* @dev: registered network device to modify
|
|
*
|
|
* Return: error code on failures
|
|
*/
|
|
static int batadv_softif_init_late(struct net_device *dev)
|
|
{
|
|
struct batadv_priv *bat_priv;
|
|
u32 random_seqno;
|
|
int ret;
|
|
size_t cnt_len = sizeof(u64) * BATADV_CNT_NUM;
|
|
|
|
batadv_set_lockdep_class(dev);
|
|
|
|
bat_priv = netdev_priv(dev);
|
|
bat_priv->soft_iface = dev;
|
|
|
|
/* batadv_interface_stats() needs to be available as soon as
|
|
* register_netdevice() has been called
|
|
*/
|
|
bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(u64));
|
|
if (!bat_priv->bat_counters)
|
|
return -ENOMEM;
|
|
|
|
atomic_set(&bat_priv->aggregated_ogms, 1);
|
|
atomic_set(&bat_priv->bonding, 0);
|
|
#ifdef CONFIG_BATMAN_ADV_BLA
|
|
atomic_set(&bat_priv->bridge_loop_avoidance, 1);
|
|
#endif
|
|
#ifdef CONFIG_BATMAN_ADV_DAT
|
|
atomic_set(&bat_priv->distributed_arp_table, 1);
|
|
#endif
|
|
#ifdef CONFIG_BATMAN_ADV_MCAST
|
|
bat_priv->mcast.querier_ipv4.exists = false;
|
|
bat_priv->mcast.querier_ipv4.shadowing = false;
|
|
bat_priv->mcast.querier_ipv6.exists = false;
|
|
bat_priv->mcast.querier_ipv6.shadowing = false;
|
|
bat_priv->mcast.flags = BATADV_NO_FLAGS;
|
|
atomic_set(&bat_priv->multicast_mode, 1);
|
|
atomic_set(&bat_priv->mcast.num_disabled, 0);
|
|
atomic_set(&bat_priv->mcast.num_want_all_unsnoopables, 0);
|
|
atomic_set(&bat_priv->mcast.num_want_all_ipv4, 0);
|
|
atomic_set(&bat_priv->mcast.num_want_all_ipv6, 0);
|
|
#endif
|
|
atomic_set(&bat_priv->gw.mode, BATADV_GW_MODE_OFF);
|
|
atomic_set(&bat_priv->gw.bandwidth_down, 100);
|
|
atomic_set(&bat_priv->gw.bandwidth_up, 20);
|
|
atomic_set(&bat_priv->orig_interval, 1000);
|
|
atomic_set(&bat_priv->hop_penalty, 30);
|
|
#ifdef CONFIG_BATMAN_ADV_DEBUG
|
|
atomic_set(&bat_priv->log_level, 0);
|
|
#endif
|
|
atomic_set(&bat_priv->fragmentation, 1);
|
|
atomic_set(&bat_priv->packet_size_max, ETH_DATA_LEN);
|
|
atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN);
|
|
atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN);
|
|
|
|
atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE);
|
|
atomic_set(&bat_priv->bcast_seqno, 1);
|
|
atomic_set(&bat_priv->tt.vn, 0);
|
|
atomic_set(&bat_priv->tt.local_changes, 0);
|
|
atomic_set(&bat_priv->tt.ogm_append_cnt, 0);
|
|
#ifdef CONFIG_BATMAN_ADV_BLA
|
|
atomic_set(&bat_priv->bla.num_requests, 0);
|
|
#endif
|
|
atomic_set(&bat_priv->tp_num, 0);
|
|
|
|
bat_priv->tt.last_changeset = NULL;
|
|
bat_priv->tt.last_changeset_len = 0;
|
|
bat_priv->isolation_mark = 0;
|
|
bat_priv->isolation_mark_mask = 0;
|
|
|
|
/* randomize initial seqno to avoid collision */
|
|
get_random_bytes(&random_seqno, sizeof(random_seqno));
|
|
atomic_set(&bat_priv->frag_seqno, random_seqno);
|
|
|
|
bat_priv->primary_if = NULL;
|
|
bat_priv->num_ifaces = 0;
|
|
|
|
batadv_nc_init_bat_priv(bat_priv);
|
|
|
|
ret = batadv_algo_select(bat_priv, batadv_routing_algo);
|
|
if (ret < 0)
|
|
goto free_bat_counters;
|
|
|
|
ret = batadv_debugfs_add_meshif(dev);
|
|
if (ret < 0)
|
|
goto free_bat_counters;
|
|
|
|
ret = batadv_mesh_init(dev);
|
|
if (ret < 0)
|
|
goto unreg_debugfs;
|
|
|
|
return 0;
|
|
|
|
unreg_debugfs:
|
|
batadv_debugfs_del_meshif(dev);
|
|
free_bat_counters:
|
|
free_percpu(bat_priv->bat_counters);
|
|
bat_priv->bat_counters = NULL;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface
|
|
* @dev: batadv_soft_interface used as master interface
|
|
* @slave_dev: net_device which should become the slave interface
|
|
*
|
|
* Return: 0 if successful or error otherwise.
|
|
*/
|
|
static int batadv_softif_slave_add(struct net_device *dev,
|
|
struct net_device *slave_dev)
|
|
{
|
|
struct batadv_hard_iface *hard_iface;
|
|
struct net *net = dev_net(dev);
|
|
int ret = -EINVAL;
|
|
|
|
hard_iface = batadv_hardif_get_by_netdev(slave_dev);
|
|
if (!hard_iface || hard_iface->soft_iface)
|
|
goto out;
|
|
|
|
ret = batadv_hardif_enable_interface(hard_iface, net, dev->name);
|
|
|
|
out:
|
|
if (hard_iface)
|
|
batadv_hardif_put(hard_iface);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface
|
|
* @dev: batadv_soft_interface used as master interface
|
|
* @slave_dev: net_device which should be removed from the master interface
|
|
*
|
|
* Return: 0 if successful or error otherwise.
|
|
*/
|
|
static int batadv_softif_slave_del(struct net_device *dev,
|
|
struct net_device *slave_dev)
|
|
{
|
|
struct batadv_hard_iface *hard_iface;
|
|
int ret = -EINVAL;
|
|
|
|
hard_iface = batadv_hardif_get_by_netdev(slave_dev);
|
|
|
|
if (!hard_iface || hard_iface->soft_iface != dev)
|
|
goto out;
|
|
|
|
batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP);
|
|
ret = 0;
|
|
|
|
out:
|
|
if (hard_iface)
|
|
batadv_hardif_put(hard_iface);
|
|
return ret;
|
|
}
|
|
|
|
static const struct net_device_ops batadv_netdev_ops = {
|
|
.ndo_init = batadv_softif_init_late,
|
|
.ndo_open = batadv_interface_open,
|
|
.ndo_stop = batadv_interface_release,
|
|
.ndo_get_stats = batadv_interface_stats,
|
|
.ndo_vlan_rx_add_vid = batadv_interface_add_vid,
|
|
.ndo_vlan_rx_kill_vid = batadv_interface_kill_vid,
|
|
.ndo_set_mac_address = batadv_interface_set_mac_addr,
|
|
.ndo_change_mtu = batadv_interface_change_mtu,
|
|
.ndo_set_rx_mode = batadv_interface_set_rx_mode,
|
|
.ndo_start_xmit = batadv_interface_tx,
|
|
.ndo_validate_addr = eth_validate_addr,
|
|
.ndo_add_slave = batadv_softif_slave_add,
|
|
.ndo_del_slave = batadv_softif_slave_del,
|
|
};
|
|
|
|
static void batadv_get_drvinfo(struct net_device *dev,
|
|
struct ethtool_drvinfo *info)
|
|
{
|
|
strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver));
|
|
strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version));
|
|
strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
|
|
strlcpy(info->bus_info, "batman", sizeof(info->bus_info));
|
|
}
|
|
|
|
/* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
|
|
* Declare each description string in struct.name[] to get fixed sized buffer
|
|
* and compile time checking for strings longer than ETH_GSTRING_LEN.
|
|
*/
|
|
static const struct {
|
|
const char name[ETH_GSTRING_LEN];
|
|
} batadv_counters_strings[] = {
|
|
{ "tx" },
|
|
{ "tx_bytes" },
|
|
{ "tx_dropped" },
|
|
{ "rx" },
|
|
{ "rx_bytes" },
|
|
{ "forward" },
|
|
{ "forward_bytes" },
|
|
{ "mgmt_tx" },
|
|
{ "mgmt_tx_bytes" },
|
|
{ "mgmt_rx" },
|
|
{ "mgmt_rx_bytes" },
|
|
{ "frag_tx" },
|
|
{ "frag_tx_bytes" },
|
|
{ "frag_rx" },
|
|
{ "frag_rx_bytes" },
|
|
{ "frag_fwd" },
|
|
{ "frag_fwd_bytes" },
|
|
{ "tt_request_tx" },
|
|
{ "tt_request_rx" },
|
|
{ "tt_response_tx" },
|
|
{ "tt_response_rx" },
|
|
{ "tt_roam_adv_tx" },
|
|
{ "tt_roam_adv_rx" },
|
|
#ifdef CONFIG_BATMAN_ADV_DAT
|
|
{ "dat_get_tx" },
|
|
{ "dat_get_rx" },
|
|
{ "dat_put_tx" },
|
|
{ "dat_put_rx" },
|
|
{ "dat_cached_reply_tx" },
|
|
#endif
|
|
#ifdef CONFIG_BATMAN_ADV_NC
|
|
{ "nc_code" },
|
|
{ "nc_code_bytes" },
|
|
{ "nc_recode" },
|
|
{ "nc_recode_bytes" },
|
|
{ "nc_buffer" },
|
|
{ "nc_decode" },
|
|
{ "nc_decode_bytes" },
|
|
{ "nc_decode_failed" },
|
|
{ "nc_sniffed" },
|
|
#endif
|
|
};
|
|
|
|
static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data)
|
|
{
|
|
if (stringset == ETH_SS_STATS)
|
|
memcpy(data, batadv_counters_strings,
|
|
sizeof(batadv_counters_strings));
|
|
}
|
|
|
|
static void batadv_get_ethtool_stats(struct net_device *dev,
|
|
struct ethtool_stats *stats, u64 *data)
|
|
{
|
|
struct batadv_priv *bat_priv = netdev_priv(dev);
|
|
int i;
|
|
|
|
for (i = 0; i < BATADV_CNT_NUM; i++)
|
|
data[i] = batadv_sum_counter(bat_priv, i);
|
|
}
|
|
|
|
static int batadv_get_sset_count(struct net_device *dev, int stringset)
|
|
{
|
|
if (stringset == ETH_SS_STATS)
|
|
return BATADV_CNT_NUM;
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static const struct ethtool_ops batadv_ethtool_ops = {
|
|
.get_drvinfo = batadv_get_drvinfo,
|
|
.get_link = ethtool_op_get_link,
|
|
.get_strings = batadv_get_strings,
|
|
.get_ethtool_stats = batadv_get_ethtool_stats,
|
|
.get_sset_count = batadv_get_sset_count,
|
|
};
|
|
|
|
/**
|
|
* batadv_softif_free - Deconstructor of batadv_soft_interface
|
|
* @dev: Device to cleanup and remove
|
|
*/
|
|
static void batadv_softif_free(struct net_device *dev)
|
|
{
|
|
batadv_debugfs_del_meshif(dev);
|
|
batadv_mesh_free(dev);
|
|
|
|
/* some scheduled RCU callbacks need the bat_priv struct to accomplish
|
|
* their tasks. Wait for them all to be finished before freeing the
|
|
* netdev and its private data (bat_priv)
|
|
*/
|
|
rcu_barrier();
|
|
|
|
free_netdev(dev);
|
|
}
|
|
|
|
/**
|
|
* batadv_softif_init_early - early stage initialization of soft interface
|
|
* @dev: registered network device to modify
|
|
*/
|
|
static void batadv_softif_init_early(struct net_device *dev)
|
|
{
|
|
ether_setup(dev);
|
|
|
|
dev->netdev_ops = &batadv_netdev_ops;
|
|
dev->destructor = batadv_softif_free;
|
|
dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_NETNS_LOCAL;
|
|
dev->priv_flags |= IFF_NO_QUEUE;
|
|
|
|
/* can't call min_mtu, because the needed variables
|
|
* have not been initialized yet
|
|
*/
|
|
dev->mtu = ETH_DATA_LEN;
|
|
|
|
/* generate random address */
|
|
eth_hw_addr_random(dev);
|
|
|
|
dev->ethtool_ops = &batadv_ethtool_ops;
|
|
}
|
|
|
|
struct net_device *batadv_softif_create(struct net *net, const char *name)
|
|
{
|
|
struct net_device *soft_iface;
|
|
int ret;
|
|
|
|
soft_iface = alloc_netdev(sizeof(struct batadv_priv), name,
|
|
NET_NAME_UNKNOWN, batadv_softif_init_early);
|
|
if (!soft_iface)
|
|
return NULL;
|
|
|
|
dev_net_set(soft_iface, net);
|
|
|
|
soft_iface->rtnl_link_ops = &batadv_link_ops;
|
|
|
|
ret = register_netdevice(soft_iface);
|
|
if (ret < 0) {
|
|
pr_err("Unable to register the batman interface '%s': %i\n",
|
|
name, ret);
|
|
free_netdev(soft_iface);
|
|
return NULL;
|
|
}
|
|
|
|
return soft_iface;
|
|
}
|
|
|
|
/**
|
|
* batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs
|
|
* @soft_iface: the to-be-removed batman-adv interface
|
|
*/
|
|
void batadv_softif_destroy_sysfs(struct net_device *soft_iface)
|
|
{
|
|
struct batadv_priv *bat_priv = netdev_priv(soft_iface);
|
|
struct batadv_softif_vlan *vlan;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
/* destroy the "untagged" VLAN */
|
|
vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
|
|
if (vlan) {
|
|
batadv_softif_destroy_vlan(bat_priv, vlan);
|
|
batadv_softif_vlan_put(vlan);
|
|
}
|
|
|
|
batadv_sysfs_del_meshif(soft_iface);
|
|
unregister_netdevice(soft_iface);
|
|
}
|
|
|
|
/**
|
|
* batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink
|
|
* @soft_iface: the to-be-removed batman-adv interface
|
|
* @head: list pointer
|
|
*/
|
|
static void batadv_softif_destroy_netlink(struct net_device *soft_iface,
|
|
struct list_head *head)
|
|
{
|
|
struct batadv_priv *bat_priv = netdev_priv(soft_iface);
|
|
struct batadv_hard_iface *hard_iface;
|
|
struct batadv_softif_vlan *vlan;
|
|
|
|
list_for_each_entry(hard_iface, &batadv_hardif_list, list) {
|
|
if (hard_iface->soft_iface == soft_iface)
|
|
batadv_hardif_disable_interface(hard_iface,
|
|
BATADV_IF_CLEANUP_KEEP);
|
|
}
|
|
|
|
/* destroy the "untagged" VLAN */
|
|
vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
|
|
if (vlan) {
|
|
batadv_softif_destroy_vlan(bat_priv, vlan);
|
|
batadv_softif_vlan_put(vlan);
|
|
}
|
|
|
|
batadv_sysfs_del_meshif(soft_iface);
|
|
unregister_netdevice_queue(soft_iface, head);
|
|
}
|
|
|
|
bool batadv_softif_is_valid(const struct net_device *net_dev)
|
|
{
|
|
if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
struct rtnl_link_ops batadv_link_ops __read_mostly = {
|
|
.kind = "batadv",
|
|
.priv_size = sizeof(struct batadv_priv),
|
|
.setup = batadv_softif_init_early,
|
|
.dellink = batadv_softif_destroy_netlink,
|
|
};
|