Release 4.11 net/bridge/br_device.c

Directory: net/bridge
/*
 *      Device handling code
 *      Linux ethernet bridge
 *
 *      Authors:
 *      Lennert Buytenhek               <buytenh@gnu.org>
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 */

#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/netpoll.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/list.h>
#include <linux/netfilter_bridge.h>

#include <linux/uaccess.h>
#include "br_private.h"


#define COMMON_FEATURES (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | \
                         NETIF_F_GSO_MASK | NETIF_F_HW_CSUM)


const struct nf_br_ops __rcu *nf_br_ops __read_mostly;

EXPORT_SYMBOL_GPL(nf_br_ops);


static struct lock_class_key bridge_netdev_addr_lock_key;

/* net device transmit always called with BH disabled */


netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);
	const unsigned char *dest = skb->data;
	struct net_bridge_fdb_entry *dst;
	struct net_bridge_mdb_entry *mdst;
	struct pcpu_sw_netstats *brstats = this_cpu_ptr(br->stats);
	const struct nf_br_ops *nf_ops;
	u16 vid = 0;

	rcu_read_lock();
	nf_ops = rcu_dereference(nf_br_ops);
	if (nf_ops && nf_ops->br_dev_xmit_hook(skb)) {
		rcu_read_unlock();
		return NETDEV_TX_OK;
	}

	u64_stats_update_begin(&brstats->syncp);
	brstats->tx_packets++;
	brstats->tx_bytes += skb->len;
	u64_stats_update_end(&brstats->syncp);

	BR_INPUT_SKB_CB(skb)->brdev = dev;

	skb_reset_mac_header(skb);
	skb_pull(skb, ETH_HLEN);

	if (!br_allowed_ingress(br, br_vlan_group_rcu(br), skb, &vid))
		goto out;

	if (is_broadcast_ether_addr(dest)) {
		br_flood(br, skb, BR_PKT_BROADCAST, false, true);
	} else if (is_multicast_ether_addr(dest)) {
		if (unlikely(netpoll_tx_running(dev))) {
			br_flood(br, skb, BR_PKT_MULTICAST, false, true);
			goto out;
		}
		if (br_multicast_rcv(br, NULL, skb, vid)) {
			kfree_skb(skb);
			goto out;
		}

		mdst = br_mdb_get(br, skb, vid);
		if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) &&
		    br_multicast_querier_exists(br, eth_hdr(skb)))
			br_multicast_flood(mdst, skb, false, true);
		else
			br_flood(br, skb, BR_PKT_MULTICAST, false, true);
	} else if ((dst = br_fdb_find_rcu(br, dest, vid)) != NULL) {
		br_forward(dst->dst, skb, false, true);
	} else {
		br_flood(br, skb, BR_PKT_UNICAST, false, true);
	}
out:
	rcu_read_unlock();
	return NETDEV_TX_OK;
}

Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 90 24.66% 5 14.29%
Linus Torvalds (pre-git) 81 22.19% 1 2.86%
Stephen Hemminger 46 12.60% 6 17.14%
Nikolay Aleksandrov 46 12.60% 5 14.29%
Pablo Neira Ayuso 20 5.48% 2 5.71%
Toshiaki Makita 16 4.38% 1 2.86%
Eric Dumazet 16 4.38% 1 2.86%
Vlad Yasevich 13 3.56% 4 11.43%
Linus Lüssing 12 3.29% 2 5.71%
Bart De Schuymer 9 2.47% 1 2.86%
Linus Torvalds 7 1.92% 1 2.86%
Arnaldo Carvalho de Melo 3 0.82% 1 2.86%
Américo Wang 2 0.55% 1 2.86%
Li RongQing 1 0.27% 1 2.86%
Hideaki Yoshifuji / 吉藤英明 1 0.27% 1 2.86%
Patrick McHardy 1 0.27% 1 2.86%
Pavel Emelyanov 1 0.27% 1 2.86%
Total 365 100.00% 35 100.00%



static void br_set_lockdep_class(struct net_device *dev)
{
	lockdep_set_class(&dev->addr_list_lock, &bridge_netdev_addr_lock_key);
}

Contributors
Person Tokens Prop Commits CommitProp
Nikolay Aleksandrov 22 100.00% 1 100.00%
Total 22 100.00% 1 100.00%



static int br_dev_init(struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);
	int err;

	br->stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
	if (!br->stats)
		return -ENOMEM;

	err = br_vlan_init(br);
	if (err) {
		free_percpu(br->stats);
		return err;
	}

	err = br_multicast_init_stats(br);
	if (err) {
		free_percpu(br->stats);
		br_vlan_flush(br);
	}
	br_set_lockdep_class(dev);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Stephen Hemminger 42 41.58% 1 16.67%
Nikolay Aleksandrov 35 34.65% 2 33.33%
Vlad Yasevich 22 21.78% 1 16.67%
Américo Wang 1 0.99% 1 16.67%
Li RongQing 1 0.99% 1 16.67%
Total 101 100.00% 6 100.00%



static void br_dev_uninit(struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);

	br_multicast_dev_del(br);
	br_multicast_uninit_stats(br);
	br_vlan_flush(br);
	free_percpu(br->stats);
}

Contributors
Person Tokens Prop Commits CommitProp
Ido Schimmel 38 88.37% 1 50.00%
Xin Long 5 11.63% 1 50.00%
Total 43 100.00% 2 100.00%



static int br_dev_open(struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);

	netdev_update_features(dev);
	netif_start_queue(dev);
	br_stp_enable_bridge(br);
	br_multicast_open(br);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 23 52.27% 1 25.00%
Stephen Hemminger 14 31.82% 1 25.00%
Herbert Xu 5 11.36% 1 25.00%
Michał Mirosław 2 4.55% 1 25.00%
Total 44 100.00% 4 100.00%



static void br_dev_set_multicast_list(struct net_device *dev)
{
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 10 100.00% 1 100.00%
Total 10 100.00% 1 100.00%



static void br_dev_change_rx_flags(struct net_device *dev, int change)
{
	if (change & IFF_PROMISC)
		br_manage_promisc(netdev_priv(dev));
}

Contributors
Person Tokens Prop Commits CommitProp
Vlad Yasevich 28 100.00% 1 100.00%
Total 28 100.00% 1 100.00%



static int br_dev_stop(struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);

	br_stp_disable_bridge(br);
	br_multicast_stop(br);

	netif_stop_queue(dev);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Linus Torvalds (pre-git) 21 53.85% 1 25.00%
Herbert Xu 14 35.90% 1 25.00%
Stephen Hemminger 4 10.26% 2 50.00%
Total 39 100.00% 4 100.00%



static void br_get_stats64(struct net_device *dev,
			   struct rtnl_link_stats64 *stats)
{
	struct net_bridge *br = netdev_priv(dev);
	struct pcpu_sw_netstats tmp, sum = { 0 };
	unsigned int cpu;

	for_each_possible_cpu(cpu) {
		unsigned int start;
		const struct pcpu_sw_netstats *bstats
			= per_cpu_ptr(br->stats, cpu);
		do {
			start = u64_stats_fetch_begin_irq(&bstats->syncp);
			memcpy(&tmp, bstats, sizeof(tmp));
		} while (u64_stats_fetch_retry_irq(&bstats->syncp, start));
		sum.tx_bytes   += tmp.tx_bytes;
		sum.tx_packets += tmp.tx_packets;
		sum.rx_bytes   += tmp.rx_bytes;
		sum.rx_packets += tmp.rx_packets;
	}

	stats->tx_bytes   = sum.tx_bytes;
	stats->tx_packets = sum.tx_packets;
	stats->rx_bytes   = sum.rx_bytes;
	stats->rx_packets = sum.rx_packets;
}

Contributors
Person Tokens Prop Commits CommitProp
Stephen Hemminger 107 63.69% 2 33.33%
Eric Dumazet 57 33.93% 2 33.33%
Li RongQing 2 1.19% 1 16.67%
Eric W. Biedermann 2 1.19% 1 16.67%
Total 168 100.00% 6 100.00%



static int br_change_mtu(struct net_device *dev, int new_mtu)
{
	struct net_bridge *br = netdev_priv(dev);
	if (new_mtu > br_min_mtu(br))
		return -EINVAL;

	dev->mtu = new_mtu;

#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
	/* remember the MTU in the rtable for PMTU */
	dst_metric_set(&br->fake_rtable.dst, RTAX_MTU, new_mtu);
#endif

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Stephen Hemminger 35 50.72% 1 25.00%
Simon Wunderlich 23 33.33% 1 25.00%
David S. Miller 6 8.70% 1 25.00%
Pablo Neira Ayuso 5 7.25% 1 25.00%
Total 69 100.00% 4 100.00%

/* Allow setting mac address to any valid ethernet address. */


static int br_set_mac_address(struct net_device *dev, void *p)
{
	struct net_bridge *br = netdev_priv(dev);
	struct sockaddr *addr = p;

	if (!is_valid_ether_addr(addr->sa_data))
		return -EADDRNOTAVAIL;

	spin_lock_bh(&br->lock);
	if (!ether_addr_equal(dev->dev_addr, addr->sa_data)) {
		/* Mac address will be changed in br_stp_change_bridge_id(). */
		br_stp_change_bridge_id(br, addr->sa_data);
	}
	spin_unlock_bh(&br->lock);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Stephen Hemminger 87 95.60% 3 50.00%
Joe Perches 2 2.20% 1 16.67%
Danny Kukawka 1 1.10% 1 16.67%
Toshiaki Makita 1 1.10% 1 16.67%
Total 91 100.00% 6 100.00%



static void br_getinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
	strlcpy(info->driver, "bridge", sizeof(info->driver));
	strlcpy(info->version, BR_VERSION, sizeof(info->version));
	strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
	strlcpy(info->bus_info, "N/A", sizeof(info->bus_info));
}

Contributors
Person Tokens Prop Commits CommitProp
Stephen Hemminger 48 60.00% 1 50.00%
Jiri Pirko 32 40.00% 1 50.00%
Total 80 100.00% 2 100.00%



static netdev_features_t br_fix_features(struct net_device *dev,
	netdev_features_t features)
{
	struct net_bridge *br = netdev_priv(dev);

	return br_features_recompute(br, features);
}

Contributors
Person Tokens Prop Commits CommitProp
Stephen Hemminger 23 71.88% 1 25.00%
Michał Mirosław 5 15.62% 2 50.00%
Jesse Gross 4 12.50% 1 25.00%
Total 32 100.00% 4 100.00%

#ifdef CONFIG_NET_POLL_CONTROLLER


static void br_poll_controller(struct net_device *br_dev)
{
}

Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 6 60.00% 1 33.33%
Américo Wang 3 30.00% 1 33.33%
Stephen Hemminger 1 10.00% 1 33.33%
Total 10 100.00% 3 100.00%



static void br_netpoll_cleanup(struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);
	struct net_bridge_port *p;

	list_for_each_entry(p, &br->port_list, list)
		br_netpoll_disable(p);
}

Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 21 53.85% 1 33.33%
Américo Wang 18 46.15% 2 66.67%
Total 39 100.00% 3 100.00%



static int __br_netpoll_enable(struct net_bridge_port *p)
{
	struct netpoll *np;
	int err;

	np = kzalloc(sizeof(*p->np), GFP_KERNEL);
	if (!np)
		return -ENOMEM;

	err = __netpoll_setup(np, p->dev);
	if (err) {
		kfree(np);
		return err;
	}

	p->np = np;
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Cong Wang 41 53.25% 1 25.00%
Américo Wang 24 31.17% 1 25.00%
Herbert Xu 11 14.29% 1 25.00%
Eric W. Biedermann 1 1.30% 1 25.00%
Total 77 100.00% 4 100.00%



int br_netpoll_enable(struct net_bridge_port *p)
{
	if (!p->br->dev->npinfo)
		return 0;

	return __br_netpoll_enable(p);
}

Contributors
Person Tokens Prop Commits CommitProp
Stephen Hemminger 15 50.00% 2 40.00%
Herbert Xu 7 23.33% 1 20.00%
Américo Wang 4 13.33% 1 20.00%
Cong Wang 4 13.33% 1 20.00%
Total 30 100.00% 5 100.00%



static int br_netpoll_setup(struct net_device *dev, struct netpoll_info *ni)
{
	struct net_bridge *br = netdev_priv(dev);
	struct net_bridge_port *p;
	int err = 0;

	list_for_each_entry(p, &br->port_list, list) {
		if (!p->dev)
			continue;
		err = __br_netpoll_enable(p);
		if (err)
			goto fail;
	}

out:
	return err;

fail:
	br_netpoll_cleanup(dev);
	goto out;
}

Contributors
Person Tokens Prop Commits CommitProp
Cong Wang 64 77.11% 1 20.00%
Herbert Xu 10 12.05% 1 20.00%
Stephen Hemminger 6 7.23% 1 20.00%
Américo Wang 2 2.41% 1 20.00%
Jiri Pirko 1 1.20% 1 20.00%
Total 83 100.00% 5 100.00%



void br_netpoll_disable(struct net_bridge_port *p)
{
	struct netpoll *np = p->np;

	if (!np)
		return;

	p->np = NULL;

	__netpoll_free_async(np);
}

Contributors
Person Tokens Prop Commits CommitProp
Herbert Xu 19 52.78% 1 33.33%
Stephen Hemminger 16 44.44% 1 33.33%
Neil Horman 1 2.78% 1 33.33%
Total 36 100.00% 3 100.00%

#endif



static int br_add_slave(struct net_device *dev, struct net_device *slave_dev)

{
	struct net_bridge *br = netdev_priv(dev);

	return br_add_if(br, slave_dev);
}

Contributors
Person Tokens Prop Commits CommitProp
Jiri Pirko 34 100.00% 1 100.00%
Total 34 100.00% 1 100.00%



static int br_del_slave(struct net_device *dev, struct net_device *slave_dev)
{
	struct net_bridge *br = netdev_priv(dev);

	return br_del_if(br, slave_dev);
}

Contributors
Person Tokens Prop Commits CommitProp
Jiri Pirko 34 100.00% 1 100.00%
Total 34 100.00% 1 100.00%


static const struct ethtool_ops br_ethtool_ops = {
	.get_drvinfo    = br_getinfo,
	.get_link	= ethtool_op_get_link,
};


static const struct net_device_ops br_netdev_ops = {
	.ndo_open		 = br_dev_open,
	.ndo_stop		 = br_dev_stop,
	.ndo_init		 = br_dev_init,
	.ndo_uninit		 = br_dev_uninit,
	.ndo_start_xmit		 = br_dev_xmit,
	.ndo_get_stats64	 = br_get_stats64,
	.ndo_set_mac_address	 = br_set_mac_address,
	.ndo_set_rx_mode	 = br_dev_set_multicast_list,
	.ndo_change_rx_flags	 = br_dev_change_rx_flags,
	.ndo_change_mtu		 = br_change_mtu,
	.ndo_do_ioctl		 = br_dev_ioctl,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_netpoll_setup	 = br_netpoll_setup,
	.ndo_netpoll_cleanup	 = br_netpoll_cleanup,
	.ndo_poll_controller	 = br_poll_controller,
#endif
	.ndo_add_slave		 = br_add_slave,
	.ndo_del_slave		 = br_del_slave,
	.ndo_fix_features        = br_fix_features,
	.ndo_fdb_add		 = br_fdb_add,
	.ndo_fdb_del		 = br_fdb_delete,
	.ndo_fdb_dump		 = br_fdb_dump,
	.ndo_bridge_getlink	 = br_getlink,
	.ndo_bridge_setlink	 = br_setlink,
	.ndo_bridge_dellink	 = br_dellink,
	.ndo_features_check	 = passthru_features_check,
};


static struct device_type br_type = {
	.name	= "bridge",
};



void br_dev_setup(struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);

	eth_hw_addr_random(dev);
	ether_setup(dev);

	dev->netdev_ops = &br_netdev_ops;
	dev->destructor = free_netdev;
	dev->ethtool_ops = &br_ethtool_ops;
	SET_NETDEV_DEVTYPE(dev, &br_type);
	dev->priv_flags = IFF_EBRIDGE | IFF_NO_QUEUE;

	dev->features = COMMON_FEATURES | NETIF_F_LLTX | NETIF_F_NETNS_LOCAL |
			NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
	dev->hw_features = COMMON_FEATURES | NETIF_F_HW_VLAN_CTAG_TX |
			   NETIF_F_HW_VLAN_STAG_TX;
	dev->vlan_features = COMMON_FEATURES;

	br->dev = dev;
	spin_lock_init(&br->lock);
	INIT_LIST_HEAD(&br->port_list);
	spin_lock_init(&br->hash_lock);

	br->bridge_id.prio[0] = 0x80;
	br->bridge_id.prio[1] = 0x00;

	ether_addr_copy(br->group_addr, eth_reserved_addr_base);

	br->stp_enabled = BR_NO_STP;
	br->group_fwd_mask = BR_GROUPFWD_DEFAULT;
	br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT;

	br->designated_root = br->bridge_id;
	br->bridge_max_age = br->max_age = 20 * HZ;
	br->bridge_hello_time = br->hello_time = 2 * HZ;
	br->bridge_forward_delay = br->forward_delay = 15 * HZ;
	br->bridge_ageing_time = br->ageing_time = BR_DEFAULT_AGEING_TIME;
	dev->max_mtu = ETH_MAX_MTU;

	br_netfilter_rtable_init(br);
	br_stp_timer_init(br);
	br_multicast_init(br);
	INIT_DELAYED_WORK(&br->gc_work, br_fdb_cleanup);
}
Contributors
Person Tokens Prop Commits CommitProp
Stephen Hemminger 179 68.85% 7 25.00%
Linus Torvalds (pre-git) 20 7.69% 1 3.57%
Nikolay Aleksandrov 10 3.85% 1 3.57%
Toshiaki Makita 10 3.85% 2 7.14%
Vlad Yasevich 8 3.08% 1 3.57%
Jarod Wilson 6 2.31% 1 3.57%
Michał Mirosław 5 1.92% 1 3.57%
Vivien Didelot 4 1.54% 1 3.57%
Herbert Xu 3 1.15% 3 10.71%
Wilfried Klaebe 3 1.15% 1 3.57%
Alexey Dobriyan 2 0.77% 1 3.57%
Patrick McHardy 2 0.77% 1 3.57%
Phil Sutter 2 0.77% 1 3.57%
Scott Feldman 1 0.38% 1 3.57%
Ben Hutchings 1 0.38% 1 3.57%
Jesse Gross 1 0.38% 1 3.57%
Ido Schimmel 1 0.38% 1 3.57%
Joe Perches 1 0.38% 1 3.57%
Danny Kukawka 1 0.38% 1 3.57%
Total 260 100.00% 28 100.00%

Overall Contributors
Person Tokens Prop Commits CommitProp
Stephen Hemminger 710 37.08% 23 22.12%
Herbert Xu 191 9.97% 9 8.65%
Linus Torvalds (pre-git) 166 8.67% 1 0.96%
Nikolay Aleksandrov 118 6.16% 8 7.69%
Jiri Pirko 112 5.85% 4 3.85%
Cong Wang 109 5.69% 1 0.96%
Vlad Yasevich 85 4.44% 8 7.69%
Américo Wang 81 4.23% 5 4.81%
Eric Dumazet 75 3.92% 2 1.92%
Ido Schimmel 44 2.30% 1 0.96%
Pablo Neira Ayuso 38 1.98% 3 2.88%
Toshiaki Makita 32 1.67% 5 4.81%
John Fastabend 25 1.31% 2 1.92%
Simon Wunderlich 23 1.20% 1 0.96%
Michał Mirosław 17 0.89% 2 1.92%
Linus Lüssing 12 0.63% 2 1.92%
Bart De Schuymer 12 0.63% 1 0.96%
Linus Torvalds 8 0.42% 2 1.92%
David S. Miller 6 0.31% 1 0.96%
Jarod Wilson 6 0.31% 1 0.96%
Jesse Gross 5 0.26% 1 0.96%
Xin Long 5 0.26% 1 0.96%
Vivien Didelot 4 0.21% 1 0.96%
Li RongQing 4 0.21% 1 0.96%
Patrick McHardy 3 0.16% 2 1.92%
Wilfried Klaebe 3 0.16% 1 0.96%
Joe Perches 3 0.16% 2 1.92%
Arnaldo Carvalho de Melo 3 0.16% 1 0.96%
Eric W. Biedermann 3 0.16% 2 1.92%
Alexey Dobriyan 2 0.10% 1 0.96%
Danny Kukawka 2 0.10% 2 1.92%
Phil Sutter 2 0.10% 1 0.96%
Neil Horman 1 0.05% 1 0.96%
Hideaki Yoshifuji / 吉藤英明 1 0.05% 1 0.96%
Scott Feldman 1 0.05% 1 0.96%
Ben Hutchings 1 0.05% 1 0.96%
Adrian Bunk 1 0.05% 1 0.96%
Pavel Emelyanov 1 0.05% 1 0.96%
Total 1915 100.00% 104 100.00%
Directory: net/bridge

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Herbert Xu	90	24.66%	5	14.29%
Linus Torvalds (pre-git)	81	22.19%	1	2.86%
Stephen Hemminger	46	12.60%	6	17.14%
Nikolay Aleksandrov	46	12.60%	5	14.29%
Pablo Neira Ayuso	20	5.48%	2	5.71%
Toshiaki Makita	16	4.38%	1	2.86%
Eric Dumazet	16	4.38%	1	2.86%
Vlad Yasevich	13	3.56%	4	11.43%
Linus Lüssing	12	3.29%	2	5.71%
Bart De Schuymer	9	2.47%	1	2.86%
Linus Torvalds	7	1.92%	1	2.86%
Arnaldo Carvalho de Melo	3	0.82%	1	2.86%
Américo Wang	2	0.55%	1	2.86%
Li RongQing	1	0.27%	1	2.86%
Hideaki Yoshifuji / 吉藤英明	1	0.27%	1	2.86%
Patrick McHardy	1	0.27%	1	2.86%
Pavel Emelyanov	1	0.27%	1	2.86%
Total	365	100.00%	35	100.00%
cregit-Linux how code gets into the kernel

Release 4.11 net/bridge/br_device.c

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