Release 4.11 net/8021q/vlan_dev.c

/* -*- linux-c -*-
 * INET         802.1Q VLAN
 *              Ethernet-type device handling.
 *
 * Authors:     Ben Greear <greearb@candelatech.com>
 *              Please send support related email to: netdev@vger.kernel.org
 *              VLAN Home Page: http://www.candelatech.com/~greear/vlan.html
 *
 * Fixes:       Mar 22 2001: Martin Bokaemper <mbokaemper@unispherenetworks.com>
 *                - reset skb->pkt_type on incoming packets when MAC was changed
 *                - see that changed MAC is saddr for outgoing packets
 *              Oct 20, 2001:  Ard van Breeman:
 *                - Fix MC-list, finally.
 *                - Flush MC-list on VLAN destroy.
 *
 *
 *              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.
 */


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/net_tstamp.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <net/arp.h>
#include <net/switchdev.h>

#include "vlan.h"
#include "vlanproc.h"
#include <linux/if_vlan.h>
#include <linux/netpoll.h>

/*
 *      Create the VLAN header for an arbitrary protocol layer
 *
 *      saddr=NULL      means use device source address
 *      daddr=NULL      means leave destination address (eg unresolved arp)
 *
 *  This is called when the SKB is moving down the stack towards the
 *  physical devices.
 */


static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
				unsigned short type,
				const void *daddr, const void *saddr,
				unsigned int len)
{
	struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
	struct vlan_hdr *vhdr;
	unsigned int vhdrlen = 0;
	u16 vlan_tci = 0;
	int rc;

	if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) {
		vhdr = (struct vlan_hdr *) skb_push(skb, VLAN_HLEN);

		vlan_tci = vlan->vlan_id;
		vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
		vhdr->h_vlan_TCI = htons(vlan_tci);

		/*
                 *  Set the protocol type. For a packet of type ETH_P_802_3/2 we
                 *  put the length in here instead.
                 */
		if (type != ETH_P_802_3 && type != ETH_P_802_2)
			vhdr->h_vlan_encapsulated_proto = htons(type);
		else
			vhdr->h_vlan_encapsulated_proto = htons(len);

		skb->protocol = vlan->vlan_proto;
		type = ntohs(vlan->vlan_proto);
		vhdrlen = VLAN_HLEN;
	}

	/* Before delegating work to the lower layer, enter our MAC-address */
	if (saddr == NULL)
		saddr = dev->dev_addr;

	/* Now make the underlying real hard header */
	dev = vlan->real_dev;
	rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen);
	if (rc > 0)
		rc += vhdrlen;
	return rc;
}

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Linus Torvalds
154
70.32%
1
7.14%
Patrick McHardy
46
21.00%
6
42.86%
Octavian Purdila
5
2.28%
1
7.14%
Jerome Borsboom
5
2.28%
1
7.14%
Wang Sheng-Hui
3
1.37%
1
7.14%
Stephen Hemminger
3
1.37%
2
14.29%
Eyal Perry
2
0.91%
1
7.14%
David S. Miller
1
0.46%
1
7.14%
Total
219
100.00%
14
100.00%



static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb)
{
#ifdef CONFIG_NET_POLL_CONTROLLER
	if (vlan->netpoll)
		netpoll_send_skb(vlan->netpoll, skb);
#else
	BUG();
#endif
	return NETDEV_TX_OK;
}

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Américo Wang
45
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1
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45
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1
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static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb,
					    struct net_device *dev)
{
	struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
	struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data);
	unsigned int len;
	int ret;

	/* Handle non-VLAN frames if they are sent to us, for example by DHCP.
         *
         * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING
         * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs...
         */
	if (veth->h_vlan_proto != vlan->vlan_proto ||
	    vlan->flags & VLAN_FLAG_REORDER_HDR) {
		u16 vlan_tci;
		vlan_tci = vlan->vlan_id;
		vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority);
		__vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci);
	}

	skb->dev = vlan->real_dev;
	len = skb->len;
	if (unlikely(netpoll_tx_running(dev)))
		return vlan_netpoll_send_skb(vlan, skb);

	ret = dev_queue_xmit(skb);

	if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
		struct vlan_pcpu_stats *stats;

		stats = this_cpu_ptr(vlan->vlan_pcpu_stats);
		u64_stats_update_begin(&stats->syncp);
		stats->tx_packets++;
		stats->tx_bytes += len;
		u64_stats_update_end(&stats->syncp);
	} else {
		this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped);
	}

	return ret;
}

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Eric Dumazet
80
38.28%
3
14.29%
Linus Torvalds
54
25.84%
1
4.76%
Américo Wang
20
9.57%
1
4.76%
Patrick McHardy
14
6.70%
5
23.81%
David S. Miller
13
6.22%
4
19.05%
Benjamin LaHaise
13
6.22%
1
4.76%
Joonwoo Park
5
2.39%
1
4.76%
Shmulik Hen
5
2.39%
1
4.76%
Eyal Perry
2
0.96%
1
4.76%
Wei Yongjun
1
0.48%
1
4.76%
Stephen Hemminger
1
0.48%
1
4.76%
John Fastabend
1
0.48%
1
4.76%
Total
209
100.00%
21
100.00%



static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu)
{
	struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
	unsigned int max_mtu = real_dev->mtu;

	if (netif_reduces_vlan_mtu(real_dev))
		max_mtu -= VLAN_HLEN;
	if (max_mtu < new_mtu)
		return -ERANGE;

	dev->mtu = new_mtu;

	return 0;
}

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Paolo Abeni
26
40.62%
1
16.67%
Linus Torvalds
20
31.25%
1
16.67%
David S. Miller
15
23.44%
1
16.67%
Jiri Pirko
1
1.56%
1
16.67%
Patrick McHardy
1
1.56%
1
16.67%
John W. Linville
1
1.56%
1
16.67%
Total
64
100.00%
6
100.00%



void vlan_dev_set_ingress_priority(const struct net_device *dev,
				   u32 skb_prio, u16 vlan_prio)
{
	struct vlan_dev_priv *vlan = vlan_dev_priv(dev);

	if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio)
		vlan->nr_ingress_mappings--;
	else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio)
		vlan->nr_ingress_mappings++;

	vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio;
}

Contributors
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CommitProp
Patrick McHardy
52
67.53%
3
60.00%
Linus Torvalds
23
29.87%
1
20.00%
Jiri Pirko
2
2.60%
1
20.00%
Total
77
100.00%
5
100.00%



int vlan_dev_set_egress_priority(const struct net_device *dev,
				 u32 skb_prio, u16 vlan_prio)
{
	struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
	struct vlan_priority_tci_mapping *mp = NULL;
	struct vlan_priority_tci_mapping *np;
	u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;

	/* See if a priority mapping exists.. */
	mp = vlan->egress_priority_map[skb_prio & 0xF];
	while (mp) {
		if (mp->priority == skb_prio) {
			if (mp->vlan_qos && !vlan_qos)
				vlan->nr_egress_mappings--;
			else if (!mp->vlan_qos && vlan_qos)
				vlan->nr_egress_mappings++;
			mp->vlan_qos = vlan_qos;
			return 0;
		}
		mp = mp->next;
	}

	/* Create a new mapping then. */
	mp = vlan->egress_priority_map[skb_prio & 0xF];
	np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL);
	if (!np)
		return -ENOBUFS;

	np->next = mp;
	np->priority = skb_prio;
	np->vlan_qos = vlan_qos;
	/* Before inserting this element in hash table, make sure all its fields
         * are committed to memory.
         * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask()
         */
	smp_wmb();
	vlan->egress_priority_map[skb_prio & 0xF] = np;
	if (vlan_qos)
		vlan->nr_egress_mappings++;
	return 0;
}

Contributors
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Linus Torvalds
116
57.71%
1
11.11%
Patrick McHardy
71
35.32%
3
33.33%
Björn Andersson
6
2.99%
1
11.11%
Eric Dumazet
5
2.49%
2
22.22%
Jiri Pirko
2
1.00%
1
11.11%
David S. Miller
1
0.50%
1
11.11%
Total
201
100.00%
9
100.00%

/* Flags are defined in the vlan_flags enum in include/linux/if_vlan.h file. */


int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask)
{
	struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
	u32 old_flags = vlan->flags;

	if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
		     VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP))
		return -EINVAL;

	vlan->flags = (old_flags & ~mask) | (flags & mask);

	if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) {
		if (vlan->flags & VLAN_FLAG_GVRP)
			vlan_gvrp_request_join(dev);
		else
			vlan_gvrp_request_leave(dev);
	}

	if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) {
		if (vlan->flags & VLAN_FLAG_MVRP)
			vlan_mvrp_request_join(dev);
		else
			vlan_mvrp_request_leave(dev);
	}
	return 0;
}

Contributors
Person
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CommitProp
Patrick McHardy
87
58.39%
5
62.50%
David Ward
40
26.85%
1
12.50%
Linus Torvalds
20
13.42%
1
12.50%
Jiri Pirko
2
1.34%
1
12.50%
Total
149
100.00%
8
100.00%



void vlan_dev_get_realdev_name(const struct net_device *dev, char *result)
{
	strncpy(result, vlan_dev_priv(dev)->real_dev->name, 23);
}

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Ben Greear
26
83.87%
1
33.33%
Patrick McHardy
4
12.90%
1
33.33%
Jiri Pirko
1
3.23%
1
33.33%
Total
31
100.00%
3
100.00%



bool vlan_dev_inherit_address(struct net_device *dev,
			      struct net_device *real_dev)
{
	if (dev->addr_assign_type != NET_ADDR_STOLEN)
		return false;

	ether_addr_copy(dev->dev_addr, real_dev->dev_addr);
	call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
	return true;
}

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Mike Manning
47
100.00%
1
100.00%
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47
100.00%
1
100.00%



static int vlan_dev_open(struct net_device *dev)
{
	struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
	struct net_device *real_dev = vlan->real_dev;
	int err;

	if (!(real_dev->flags & IFF_UP) &&
	    !(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
		return -ENETDOWN;

	if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr) &&
	    !vlan_dev_inherit_address(dev, real_dev)) {
		err = dev_uc_add(real_dev, dev->dev_addr);
		if (err < 0)
			goto out;
	}

	if (dev->flags & IFF_ALLMULTI) {
		err = dev_set_allmulti(real_dev, 1);
		if (err < 0)
			goto del_unicast;
	}
	if (dev->flags & IFF_PROMISC) {
		err = dev_set_promiscuity(real_dev, 1);
		if (err < 0)
			goto clear_allmulti;
	}

	ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr);

	if (vlan->flags & VLAN_FLAG_GVRP)
		vlan_gvrp_request_join(dev);

	if (vlan->flags & VLAN_FLAG_MVRP)
		vlan_mvrp_request_join(dev);

	if (netif_carrier_ok(real_dev))
		netif_carrier_on(dev);
	return 0;

clear_allmulti:
	if (dev->flags & IFF_ALLMULTI)
		dev_set_allmulti(real_dev, -1);
del_unicast:
	if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
		dev_uc_del(real_dev, dev->dev_addr);
out:
	netif_carrier_off(dev);
	return err;
}

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Patrick McHardy
103
39.31%
5
33.33%
Wang Chen
84
32.06%
1
6.67%
David S. Miller
28
10.69%
1
6.67%
David Ward
13
4.96%
1
6.67%
Jay Vosburgh
10
3.82%
1
6.67%
Mike Manning
8
3.05%
1
6.67%
Phil Oester
7
2.67%
1
6.67%
Joe Perches
5
1.91%
2
13.33%
Jiri Pirko
4
1.53%
2
13.33%
Total
262
100.00%
15
100.00%



static int vlan_dev_stop(struct net_device *dev)
{
	struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
	struct net_device *real_dev = vlan->real_dev;

	dev_mc_unsync(real_dev, dev);
	dev_uc_unsync(real_dev, dev);
	if (dev->flags & IFF_ALLMULTI)
		dev_set_allmulti(real_dev, -1);
	if (dev->flags & IFF_PROMISC)
		dev_set_promiscuity(real_dev, -1);

	if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
		dev_uc_del(real_dev, dev->dev_addr);

	netif_carrier_off(dev);
	return 0;
}

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Patrick McHardy
73
68.22%
5
45.45%
David S. Miller
17
15.89%
1
9.09%
Christopher Leech
6
5.61%
1
9.09%
Jay Vosburgh
5
4.67%
1
9.09%
Jiri Pirko
4
3.74%
2
18.18%
Joe Perches
2
1.87%
1
9.09%
Total
107
100.00%
11
100.00%



static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
{
	struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
	struct sockaddr *addr = p;
	int err;

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

	if (!(dev->flags & IFF_UP))
		goto out;

	if (!ether_addr_equal(addr->sa_data, real_dev->dev_addr)) {
		err = dev_uc_add(real_dev, addr->sa_data);
		if (err < 0)
			return err;
	}

	if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr))
		dev_uc_del(real_dev, dev->dev_addr);

out:
	ether_addr_copy(dev->dev_addr, addr->sa_data);
	return 0;
}

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Patrick McHardy
132
94.29%
2
33.33%
Joe Perches
5
3.57%
2
33.33%
Jiri Pirko
3
2.14%
2
33.33%
Total
140
100.00%
6
100.00%



static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
	struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
	const struct net_device_ops *ops = real_dev->netdev_ops;
	struct ifreq ifrr;
	int err = -EOPNOTSUPP;

	strncpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ);
	ifrr.ifr_ifru = ifr->ifr_ifru;

	switch (cmd) {
	case SIOCGMIIPHY:
	case SIOCGMIIREG:
	case SIOCSMIIREG:
	case SIOCSHWTSTAMP:
	case SIOCGHWTSTAMP:
		if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
			err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
		break;
	}

	if (!err)
		ifr->ifr_ifru = ifrr.ifr_ifru;

	return err;
}

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Stephen Hemminger
127
94.07%
3
50.00%
Stefan Sörensen
6
4.44%
1
16.67%
Patrick McHardy
1
0.74%
1
16.67%
Jiri Pirko
1
0.74%
1
16.67%
Total
135
100.00%
6
100.00%



static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa)
{
	struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
	const struct net_device_ops *ops = real_dev->netdev_ops;
	int err = 0;

	if (netif_device_present(real_dev) && ops->ndo_neigh_setup)
		err = ops->ndo_neigh_setup(real_dev, pa);

	return err;
}

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Frank Blaschka
66
97.06%
1
33.33%
Jiri Pirko
1
1.47%
1
33.33%
David S. Miller
1
1.47%
1
33.33%
Total
68
100.00%
3
100.00%

#if IS_ENABLED(CONFIG_FCOE)


static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid,
				   struct scatterlist *sgl, unsigned int sgc)
{
	struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
	const struct net_device_ops *ops = real_dev->netdev_ops;
	int rc = 0;

	if (ops->ndo_fcoe_ddp_setup)
		rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc);

	return rc;
}

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Vasu Dev
73
98.65%
1
50.00%
Jiri Pirko
1
1.35%
1
50.00%
Total
74
100.00%
2
100.00%



static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid)
{
	struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
	const struct net_device_ops *ops = real_dev->netdev_ops;
	int len = 0;

	if (ops->ndo_fcoe_ddp_done)
		len = ops->ndo_fcoe_ddp_done(real_dev, xid);

	return len;
}

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Vasu Dev
60
98.36%
1
50.00%
Jiri Pirko
1
1.64%
1
50.00%
Total
61
100.00%
2
100.00%



static int vlan_dev_fcoe_enable(struct net_device *dev)
{
	struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
	const struct net_device_ops *ops = real_dev->netdev_ops;
	int rc = -EINVAL;

	if (ops->ndo_fcoe_enable)
		rc = ops->ndo_fcoe_enable(real_dev);
	return rc;
}

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Yi Zou
56
98.25%
1
50.00%
Jiri Pirko
1
1.75%
1
50.00%
Total
57
100.00%
2
100.00%



static int vlan_dev_fcoe_disable(struct net_device *dev)
{
	struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
	const struct net_device_ops *ops = real_dev->netdev_ops;
	int rc = -EINVAL;

	if (ops->ndo_fcoe_disable)
		rc = ops->ndo_fcoe_disable(real_dev);
	return rc;
}

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Yi Zou
56
98.25%
1
50.00%
Jiri Pirko
1
1.75%
1
50.00%
Total
57
100.00%
2
100.00%



static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
{
	struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
	const struct net_device_ops *ops = real_dev->netdev_ops;
	int rc = -EINVAL;

	if (ops->ndo_fcoe_get_wwn)
		rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type);
	return rc;
}

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Yi Zou
67
98.53%
1
50.00%
Jiri Pirko
1
1.47%
1
50.00%
Total
68
100.00%
2
100.00%



static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid,
				    struct scatterlist *sgl, unsigned int sgc)
{
	struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
	const struct net_device_ops *ops = real_dev->netdev_ops;
	int rc = 0;

	if (ops->ndo_fcoe_ddp_target)
		rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc);

	return rc;
}
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Yi Zou
73
98.65%
1
50.00%
Jiri Pirko
1
1.35%
1
50.00%
Total
74
100.00%
2
100.00%

#endif



static void vlan_dev_change_rx_flags(struct net_device *dev, int change)
{
	struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;

	if (dev->flags & IFF_UP) {
		if (change & IFF_ALLMULTI)
			dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1);
		if (change & IFF_PROMISC)
			dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1);
	}
}

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Patrick McHardy
69
86.25%
2
50.00%
Matthijs Kooijman
10
12.50%
1
25.00%
Jiri Pirko
1
1.25%
1
25.00%
Total
80
100.00%
4
100.00%



static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
{
	dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
	dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
}

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Christopher Leech
11
31.43%
1
16.67%
David S. Miller
11
31.43%
1
16.67%
Linus Torvalds
8
22.86%
1
16.67%
Vlad Yasevich
2
5.71%
1
16.67%
Jiri Pirko
2
5.71%
1
16.67%
Patrick McHardy
1
2.86%
1
16.67%
Total
35
100.00%
6
100.00%

/*
 * vlan 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 vlan_netdev_xmit_lock_key;

static struct lock_class_key vlan_netdev_addr_lock_key;



static void vlan_dev_set_lockdep_one(struct net_device *dev,
				     struct netdev_queue *txq,
				     void *_subclass)
{
	lockdep_set_class_and_subclass(&txq->_xmit_lock,
				       &vlan_netdev_xmit_lock_key,
				       *(int *)_subclass);
}

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David S. Miller
38
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2
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38
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2
100.00%



static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
{
	lockdep_set_class_and_subclass(&dev->addr_list_lock,
				       &vlan_netdev_addr_lock_key,
				       subclass);
	netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
}

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David S. Miller
37
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3
100.00%
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37
100.00%
3
100.00%



static int vlan_dev_get_lock_subclass(struct net_device *dev)
{
	return vlan_dev_priv(dev)->nest_level;
}

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Vlad Yasevich
19
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1
100.00%
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19
100.00%
1
100.00%


static const struct header_ops vlan_header_ops = {
	.create	 = vlan_dev_hard_header,
	.parse	 = eth_header_parse,
};



static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev,
				     unsigned short type,
				     const void *daddr, const void *saddr,
				     unsigned int len)
{
	struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
	struct net_device *real_dev = vlan->real_dev;

	if (saddr == NULL)
		saddr = dev->dev_addr;

	return dev_hard_header(skb, real_dev, type, daddr, saddr, len);
}

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David S. Miller
69
85.19%
1
50.00%
Peter Boström
12
14.81%
1
50.00%
Total
81
100.00%
2
100.00%


static const struct header_ops vlan_passthru_header_ops = {
	.create	 = vlan_passthru_hard_header,
	.parse	 = eth_header_parse,
};


static struct device_type vlan_type = {
	.name	= "vlan",
};


static const struct net_device_ops vlan_netdev_ops;



static int vlan_dev_init(struct net_device *dev)
{
	struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;

	netif_carrier_off(dev);

	/* IFF_BROADCAST|IFF_MULTICAST; ??? */
	dev->flags  = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
					  IFF_MASTER | IFF_SLAVE);
	dev->state  = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
					  (1<<__LINK_STATE_DORMANT))) |
		      (1<<__LINK_STATE_PRESENT);

	dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG |
			   NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE |
			   NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC |
			   NETIF_F_ALL_FCOE;

	dev->features |= real_dev->vlan_features | NETIF_F_LLTX |
			 NETIF_F_GSO_SOFTWARE;
	dev->gso_max_size = real_dev->gso_max_size;
	dev->gso_max_segs = real_dev->gso_max_segs;
	if (dev->features & NETIF_F_VLAN_FEATURES)
		netdev_warn(real_dev, "VLAN features are set incorrectly.  Q-in-Q configurations may not work correctly.\n");

	dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE;

	/* ipv6 shared card related stuff */
	dev->dev_id = real_dev->dev_id;

	if (is_zero_ether_addr(dev->dev_addr)) {
		ether_addr_copy(dev->dev_addr, real_dev->dev_addr);
		dev->addr_assign_type = NET_ADDR_STOLEN;
	}
	if (is_zero_ether_addr(dev->broadcast))
		memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len);

#if IS_ENABLED(CONFIG_FCOE)
	dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid;
#endif

	dev->needed_headroom = real_dev->needed_headroom;
	if (vlan_hw_offload_capable(real_dev->features,
				    vlan_dev_priv(dev)->vlan_proto)) {
		dev->header_ops      = &vlan_passthru_header_ops;
		dev->hard_header_len = real_dev->hard_header_len;
	} else {
		dev->header_ops      = &vlan_header_ops;
		dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
	}

	dev->netdev_ops = &vlan_netdev_ops;

	SET_NETDEV_DEVTYPE(dev, &vlan_type);

	vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev));

	vlan_dev_priv(dev)->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
	if (!vlan_dev_priv(dev)->vlan_pcpu_stats)
		return -ENOMEM;

	return 0;
}

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Patrick McHardy
173
50.14%
3
10.34%
Eric Dumazet
49
14.20%
5
17.24%
Vlad Yasevich
29
8.41%
3
10.34%
Michał Mirosław
16
4.64%
2
6.90%
Vasu Dev
15
4.35%
1
3.45%
Toshiaki Makita
14
4.06%
2
6.90%
Mike Manning
13
3.77%
1
3.45%
Alexander Duyck
8
2.32%
1
3.45%
Doug Goldstein
8
2.32%
1
3.45%
Jay