Release 4.8 net/8021q/vlan.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:
 *              Fix for packet capture - Nick Eggleston <nick@dccinc.com>;
 *              Add HW acceleration hooks - David S. Miller <davem@redhat.com>;
 *              Correct all the locking - David S. Miller <davem@redhat.com>;
 *              Use hash table for VLAN groups - David S. Miller <davem@redhat.com>
 *
 *              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/capability.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/rculist.h>
#include <net/p8022.h>
#include <net/arp.h>
#include <linux/rtnetlink.h>
#include <linux/notifier.h>
#include <net/rtnetlink.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include <asm/uaccess.h>

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


#define DRV_VERSION "1.8"

/* Global VLAN variables */


int vlan_net_id __read_mostly;


const char vlan_fullname[] = "802.1Q VLAN Support";

const char vlan_version[] = DRV_VERSION;

/* End of global variables definitions. */



static int vlan_group_prealloc_vid(struct vlan_group *vg,
				   __be16 vlan_proto, u16 vlan_id)
{
	struct net_device **array;
	unsigned int pidx, vidx;
	unsigned int size;

	ASSERT_RTNL();

	pidx  = vlan_proto_idx(vlan_proto);
	vidx  = vlan_id / VLAN_GROUP_ARRAY_PART_LEN;
	array = vg->vlan_devices_arrays[pidx][vidx];
	if (array != NULL)
		return 0;

	size = sizeof(struct net_device *) * VLAN_GROUP_ARRAY_PART_LEN;
	array = kzalloc(size, GFP_KERNEL);
	if (array == NULL)
		return -ENOBUFS;

	vg->vlan_devices_arrays[pidx][vidx] = array;
	return 0;
}

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3
75.00%
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115
100.00%
4
100.00%



void unregister_vlan_dev(struct net_device *dev, struct list_head *head)
{
	struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
	struct net_device *real_dev = vlan->real_dev;
	struct vlan_info *vlan_info;
	struct vlan_group *grp;
	u16 vlan_id = vlan->vlan_id;

	ASSERT_RTNL();

	vlan_info = rtnl_dereference(real_dev->vlan_info);
	BUG_ON(!vlan_info);

	grp = &vlan_info->grp;

	grp->nr_vlan_devs--;

	if (vlan->flags & VLAN_FLAG_MVRP)
		vlan_mvrp_request_leave(dev);
	if (vlan->flags & VLAN_FLAG_GVRP)
		vlan_gvrp_request_leave(dev);

	vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, NULL);

	netdev_upper_dev_unlink(real_dev, dev);
	/* Because unregister_netdevice_queue() makes sure at least one rcu
         * grace period is respected before device freeing,
         * we dont need to call synchronize_net() here.
         */
	unregister_netdevice_queue(dev, head);

	if (grp->nr_vlan_devs == 0) {
		vlan_mvrp_uninit_applicant(real_dev);
		vlan_gvrp_uninit_applicant(real_dev);
	}

	/* Take it out of our own structures, but be sure to interlock with
         * HW accelerating devices or SW vlan input packet processing if
         * VLAN is not 0 (leave it there for 802.1p).
         */
	if (vlan_id)
		vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id);

	/* Get rid of the vlan's reference to real_dev */
	dev_put(real_dev);
}

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patrick mchardy
41
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eric dumazet
eric dumazet
26
14.69%
4
19.05%
linus torvalds
linus torvalds
25
14.12%
1
4.76%
jiri pirko
jiri pirko
23
12.99%
3
14.29%
david ward
david ward
20
11.30%
1
4.76%
david s. miller
david s. miller
13
7.34%
1
4.76%
americo wang
americo wang
12
6.78%
1
4.76%
veaceslav falico
veaceslav falico
7
3.95%
1
4.76%
dan aloni
dan aloni
7
3.95%
1
4.76%
stephen hemminger
stephen hemminger
2
1.13%
1
4.76%
jesse gross
jesse gross
1
0.56%
1
4.76%
Total
177
100.00%
21
100.00%



int vlan_check_real_dev(struct net_device *real_dev,
			__be16 protocol, u16 vlan_id)
{
	const char *name = real_dev->name;

	if (real_dev->features & NETIF_F_VLAN_CHALLENGED) {
		pr_info("VLANs not supported on %s\n", name);
		return -EOPNOTSUPP;
	}

	if (vlan_find_dev(real_dev, protocol, vlan_id) != NULL)
		return -EEXIST;

	return 0;
}

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patrick mchardy
patrick mchardy
34
51.52%
5
45.45%
david s. miller
david s. miller
16
24.24%
1
9.09%
linus torvalds
linus torvalds
11
16.67%
1
9.09%
alan cox
alan cox
2
3.03%
1
9.09%
joe perches
joe perches
1
1.52%
1
9.09%
stephen hemminger
stephen hemminger
1
1.52%
1
9.09%
jesse gross
jesse gross
1
1.52%
1
9.09%
Total
66
100.00%
11
100.00%



int register_vlan_dev(struct net_device *dev)
{
	struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
	struct net_device *real_dev = vlan->real_dev;
	u16 vlan_id = vlan->vlan_id;
	struct vlan_info *vlan_info;
	struct vlan_group *grp;
	int err;

	err = vlan_vid_add(real_dev, vlan->vlan_proto, vlan_id);
	if (err)
		return err;

	vlan_info = rtnl_dereference(real_dev->vlan_info);
	/* vlan_info should be there now. vlan_vid_add took care of it */
	BUG_ON(!vlan_info);

	grp = &vlan_info->grp;
	if (grp->nr_vlan_devs == 0) {
		err = vlan_gvrp_init_applicant(real_dev);
		if (err < 0)
			goto out_vid_del;
		err = vlan_mvrp_init_applicant(real_dev);
		if (err < 0)
			goto out_uninit_gvrp;
	}

	err = vlan_group_prealloc_vid(grp, vlan->vlan_proto, vlan_id);
	if (err < 0)
		goto out_uninit_mvrp;

	vlan->nest_level = dev_get_nest_level(real_dev) + 1;
	err = register_netdevice(dev);
	if (err < 0)
		goto out_uninit_mvrp;

	err = netdev_upper_dev_link(real_dev, dev);
	if (err)
		goto out_unregister_netdev;

	/* Account for reference in struct vlan_dev_priv */
	dev_hold(real_dev);

	netif_stacked_transfer_operstate(real_dev, dev);
	linkwatch_fire_event(dev); /* _MUST_ call rfc2863_policy() */

	/* So, got the sucker initialized, now lets place
         * it into our local structure.
         */
	vlan_group_set_device(grp, vlan->vlan_proto, vlan_id, dev);
	grp->nr_vlan_devs++;

	return 0;

out_unregister_netdev:
	unregister_netdevice(dev);
out_uninit_mvrp:
	if (grp->nr_vlan_devs == 0)
		vlan_mvrp_uninit_applicant(real_dev);
out_uninit_gvrp:
	if (grp->nr_vlan_devs == 0)
		vlan_gvrp_uninit_applicant(real_dev);
out_vid_del:
	vlan_vid_del(real_dev, vlan->vlan_proto, vlan_id);
	return err;
}

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patrick mchardy
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41.18%
jiri pirko
jiri pirko
67
22.87%
3
17.65%
david ward
david ward
34
11.60%
1
5.88%
pavel emelianov
pavel emelianov
17
5.80%
1
5.88%
vlad yasevich
vlad yasevich
11
3.75%
1
5.88%
veaceslav falico
veaceslav falico
9
3.07%
1
5.88%
eric dumazet
eric dumazet
3
1.02%
2
11.76%
patrick mullaney
patrick mullaney
1
0.34%
1
5.88%
Total
293
100.00%
17
100.00%

/*  Attach a VLAN device to a mac address (ie Ethernet Card).
 *  Returns 0 if the device was created or a negative error code otherwise.
 */


static int register_vlan_device(struct net_device *real_dev, u16 vlan_id)
{
	struct net_device *new_dev;
	struct vlan_dev_priv *vlan;
	struct net *net = dev_net(real_dev);
	struct vlan_net *vn = net_generic(net, vlan_net_id);
	char name[IFNAMSIZ];
	int err;

	if (vlan_id >= VLAN_VID_MASK)
		return -ERANGE;

	err = vlan_check_real_dev(real_dev, htons(ETH_P_8021Q), vlan_id);
	if (err < 0)
		return err;

	/* Gotta set up the fields for the device. */
	switch (vn->name_type) {
	case VLAN_NAME_TYPE_RAW_PLUS_VID:
		/* name will look like:  eth1.0005 */
		snprintf(name, IFNAMSIZ, "%s.%.4i", real_dev->name, vlan_id);
		break;
	case VLAN_NAME_TYPE_PLUS_VID_NO_PAD:
		/* Put our vlan.VID in the name.
                 * Name will look like:  vlan5
                 */
		snprintf(name, IFNAMSIZ, "vlan%i", vlan_id);
		break;
	case VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD:
		/* Put our vlan.VID in the name.
                 * Name will look like:  eth0.5
                 */
		snprintf(name, IFNAMSIZ, "%s.%i", real_dev->name, vlan_id);
		break;
	case VLAN_NAME_TYPE_PLUS_VID:
		/* Put our vlan.VID in the name.
                 * Name will look like:  vlan0005
                 */
	default:
		snprintf(name, IFNAMSIZ, "vlan%.4i", vlan_id);
	}

	new_dev = alloc_netdev(sizeof(struct vlan_dev_priv), name,
			       NET_NAME_UNKNOWN, vlan_setup);

	if (new_dev == NULL)
		return -ENOBUFS;

	dev_net_set(new_dev, net);
	/* need 4 bytes for extra VLAN header info,
         * hope the underlying device can handle it.
         */
	new_dev->mtu = real_dev->mtu;

	vlan = vlan_dev_priv(new_dev);
	vlan->vlan_proto = htons(ETH_P_8021Q);
	vlan->vlan_id = vlan_id;
	vlan->real_dev = real_dev;
	vlan->dent = NULL;
	vlan->flags = VLAN_FLAG_REORDER_HDR;

	new_dev->rtnl_link_ops = &vlan_link_ops;
	err = register_vlan_dev(new_dev);
	if (err < 0)
		goto out_free_newdev;

	return 0;

out_free_newdev:
	free_netdev(new_dev);
	return err;
}

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patrick mchardy
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linus torvalds
linus torvalds
91
31.60%
1
5.26%
pavel emelianov
pavel emelianov
32
11.11%
2
10.53%
stephen hemminger
stephen hemminger
31
10.76%
1
5.26%
wang sheng-hui
wang sheng-hui
13
4.51%
1
5.26%
david s. miller
david s. miller
6
2.08%
1
5.26%
eran mann
eran mann
3
1.04%
1
5.26%
tom gundersen
tom gundersen
2
0.69%
1
5.26%
jiri pirko
jiri pirko
2
0.69%
1
5.26%
al viro
al viro
1
0.35%
1
5.26%
eric dumazet
eric dumazet
1
0.35%
1
5.26%
Total
288
100.00%
19
100.00%



static void vlan_sync_address(struct net_device *dev,
			      struct net_device *vlandev)
{
	struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);

	/* May be called without an actual change */
	if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr))
		return;

	/* vlan continues to inherit address of lower device */
	if (vlan_dev_inherit_address(vlandev, dev))
		goto out;

	/* vlan address was different from the old address and is equal to
         * the new address */
	if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
	    ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
		dev_uc_del(dev, vlandev->dev_addr);

	/* vlan address was equal to the old address and is different from
         * the new address */
	if (ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) &&
	    !ether_addr_equal(vlandev->dev_addr, dev->dev_addr))
		dev_uc_add(dev, vlandev->dev_addr);

out:
	ether_addr_copy(vlan->real_dev_addr, dev->dev_addr);
}

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patrick mchardy
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15
10.95%
1
16.67%
joe perches
joe perches
8
5.84%
2
33.33%
jiri pirko
jiri pirko
4
2.92%
2
33.33%
Total
137
100.00%
6
100.00%



static void vlan_transfer_features(struct net_device *dev,
				   struct net_device *vlandev)
{
	struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);

	vlandev->gso_max_size = dev->gso_max_size;
	vlandev->gso_max_segs = dev->gso_max_segs;

	if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto))
		vlandev->hard_header_len = dev->hard_header_len;
	else
		vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;

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

	netdev_update_features(vlandev);
}

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john fastabend
john fastabend
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patrick mchardy
patrick mchardy
20
21.05%
1
12.50%
vlad yasevich
vlad yasevich
17
17.89%
1
12.50%
vasu dev
vasu dev
15
15.79%
1
12.50%
alexander duyck
alexander duyck
8
8.42%
1
12.50%
eric dumazet
eric dumazet
8
8.42%
1
12.50%
americo wang
americo wang
1
1.05%
1
12.50%
michal miroslaw
michal miroslaw
1
1.05%
1
12.50%
Total
95
100.00%
8
100.00%



static int __vlan_device_event(struct net_device *dev, unsigned long event)
{
	int err = 0;

	switch (event) {
	case NETDEV_CHANGENAME:
		vlan_proc_rem_dev(dev);
		err = vlan_proc_add_dev(dev);
		break;
	case NETDEV_REGISTER:
		err = vlan_proc_add_dev(dev);
		break;
	case NETDEV_UNREGISTER:
		vlan_proc_rem_dev(dev);
		break;
	}

	return err;
}

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pavel emelianov
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americo wang
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33.33%
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65
100.00%
3
100.00%



static int vlan_device_event(struct notifier_block *unused, unsigned long event,
			     void *ptr)
{
	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
	struct vlan_group *grp;
	struct vlan_info *vlan_info;
	int i, flgs;
	struct net_device *vlandev;
	struct vlan_dev_priv *vlan;
	bool last = false;
	LIST_HEAD(list);

	if (is_vlan_dev(dev)) {
		int err = __vlan_device_event(dev, event);

		if (err)
			return notifier_from_errno(err);
	}

	if ((event == NETDEV_UP) &&
	    (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) {
		pr_info("adding VLAN 0 to HW filter on device %s\n",
			dev->name);
		vlan_vid_add(dev, htons(ETH_P_8021Q), 0);
	}

	vlan_info = rtnl_dereference(dev->vlan_info);
	if (!vlan_info)
		goto out;
	grp = &vlan_info->grp;

	/* It is OK that we do not hold the group lock right now,
         * as we run under the RTNL lock.
         */

	switch (event) {
	case NETDEV_CHANGE:
		/* Propagate real device state to vlan devices */
		vlan_group_for_each_dev(grp, i, vlandev)
			netif_stacked_transfer_operstate(dev, vlandev);
		break;

	case NETDEV_CHANGEADDR:
		/* Adjust unicast filters on underlying device */
		vlan_group_for_each_dev(grp, i, vlandev) {
			flgs = vlandev->flags;
			if (!(flgs & IFF_UP))
				continue;

			vlan_sync_address(dev, vlandev);
		}
		break;

	case NETDEV_CHANGEMTU:
		vlan_group_for_each_dev(grp, i, vlandev) {
			if (vlandev->mtu <= dev->mtu)
				continue;

			dev_set_mtu(vlandev, dev->mtu);
		}
		break;

	case NETDEV_FEAT_CHANGE:
		/* Propagate device features to underlying device */
		vlan_group_for_each_dev(grp, i, vlandev)
			vlan_transfer_features(dev, vlandev);
		break;

	case NETDEV_DOWN: {
		struct net_device *tmp;
		LIST_HEAD(close_list);

		if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)
			vlan_vid_del(dev, htons(ETH_P_8021Q), 0);

		/* Put all VLANs for this dev in the down state too.  */
		vlan_group_for_each_dev(grp, i, vlandev) {
			flgs = vlandev->flags;
			if (!(flgs & IFF_UP))
				continue;

			vlan = vlan_dev_priv(vlandev);
			if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
				list_add(&vlandev->close_list, &close_list);
		}

		dev_close_many(&close_list, false);

		list_for_each_entry_safe(vlandev, tmp, &close_list, close_list) {
			netif_stacked_transfer_operstate(dev, vlandev);
			list_del_init(&vlandev->close_list);
		}
		list_del(&close_list);
		break;
	}
	case NETDEV_UP:
		/* Put all VLANs for this dev in the up state too.  */
		vlan_group_for_each_dev(grp, i, vlandev) {
			flgs = dev_get_flags(vlandev);
			if (flgs & IFF_UP)
				continue;

			vlan = vlan_dev_priv(vlandev);
			if (!(vlan->flags & VLAN_FLAG_LOOSE_BINDING))
				dev_change_flags(vlandev, flgs | IFF_UP);
			netif_stacked_transfer_operstate(dev, vlandev);
		}
		break;

	case NETDEV_UNREGISTER:
		/* twiddle thumbs on netns device moves */
		if (dev->reg_state != NETREG_UNREGISTERING)
			break;

		vlan_group_for_each_dev(grp, i, vlandev) {
			/* removal of last vid destroys vlan_info, abort
                         * afterwards */
			if (vlan_info->nr_vids == 1)
				last = true;

			unregister_vlan_dev(vlandev, &list);
			if (last)
				break;
		}
		unregister_netdevice_many(&list);
		break;

	case NETDEV_PRE_TYPE_CHANGE:
		/* Forbid underlaying device to change its type. */
		if (vlan_uses_dev(dev))
			return NOTIFY_BAD;
		break;

	case NETDEV_NOTIFY_PEERS:
	case NETDEV_BONDING_FAILOVER:
	case NETDEV_RESEND_IGMP:
		/* Propagate to vlan devices */
		vlan_group_for_each_dev(grp, i, vlandev)
			call_netdevice_notifiers(event, vlandev);
		break;
	}

out:
	return NOTIFY_DONE;
}

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patrick mchardy
patrick mchardy
182
31.76%
8
21.62%
linus torvalds
linus torvalds
92
16.06%
1
2.70%
david s. miller
david s. miller
81
14.14%
2
5.41%
jiri pirko
jiri pirko
43
7.50%
7
18.92%
pedro garcia
pedro garcia
31
5.41%
1
2.70%
herbert xu
herbert xu
28
4.89%
1
2.70%
ben hutchings
ben hutchings
18
3.14%
2
5.41%
americo wang
americo wang
16
2.79%
1
2.70%
pavel emelianov
pavel emelianov
16
2.79%
1
2.70%
amir hanania
amir hanania
14
2.44%
1
2.70%
jay vosburgh
jay vosburgh
12
2.09%
1
2.70%
dan aloni
dan aloni
11
1.92%
1
2.70%
david lamparter
david lamparter
10
1.75%
1
2.70%
stephen hemminger
stephen hemminger
4
0.70%
1
2.70%
patrick mullaney
patrick mullaney
3
0.52%
1
2.70%
vlad yasevich
vlad yasevich
3
0.52%
1
2.70%
eric dumazet
eric dumazet
3
0.52%
1
2.70%
tommy s. christensen
tommy s. christensen
2
0.35%
1
2.70%
joe perches
joe perches
1
0.17%
1
2.70%
stefan rompf
stefan rompf
1
0.17%
1
2.70%
andries brouwer
andries brouwer
1
0.17%
1
2.70%
jesse gross
jesse gross
1
0.17%
1
2.70%
Total
573
100.00%
37
100.00%


static struct notifier_block vlan_notifier_block __read_mostly = {
	.notifier_call = vlan_device_event,
};

/*
 *      VLAN IOCTL handler.
 *      o execute requested action or pass command to the device driver
 *   arg is really a struct vlan_ioctl_args __user *.
 */


static int vlan_ioctl_handler(struct net *net, void __user *arg)
{
	int err;
	struct vlan_ioctl_args args;
	struct net_device *dev = NULL;

	if (copy_from_user(&args, arg, sizeof(struct vlan_ioctl_args)))
		return -EFAULT;

	/* Null terminate this sucker, just in case. */
	args.device1[23] = 0;
	args.u.device2[23] = 0;

	rtnl_lock();

	switch (args.cmd) {
	case SET_VLAN_INGRESS_PRIORITY_CMD:
	case SET_VLAN_EGRESS_PRIORITY_CMD:
	case SET_VLAN_FLAG_CMD:
	case ADD_VLAN_CMD:
	case DEL_VLAN_CMD:
	case GET_VLAN_REALDEV_NAME_CMD:
	case GET_VLAN_VID_CMD:
		err = -ENODEV;
		dev = __dev_get_by_name(net, args.device1);
		if (!dev)
			goto out;

		err = -EINVAL;
		if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
			goto out;
	}

	switch (args.cmd) {
	case SET_VLAN_INGRESS_PRIORITY_CMD:
		err = -EPERM;
		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
			break;
		vlan_dev_set_ingress_priority(dev,
					      args.u.skb_priority,
					      args.vlan_qos);
		err = 0;
		break;

	case SET_VLAN_EGRESS_PRIORITY_CMD:
		err = -EPERM;
		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
			break;
		err = vlan_dev_set_egress_priority(dev,
						   args.u.skb_priority,
						   args.vlan_qos);
		break;

	case SET_VLAN_FLAG_CMD:
		err = -EPERM;
		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
			break;
		err = vlan_dev_change_flags(dev,
					    args.vlan_qos ? args.u.flag : 0,
					    args.u.flag);
		break;

	case SET_VLAN_NAME_TYPE_CMD:
		err = -EPERM;
		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
			break;
		if ((args.u.name_type >= 0) &&
		    (args.u.name_type < VLAN_NAME_TYPE_HIGHEST)) {
			struct vlan_net *vn;

			vn = net_generic(net, vlan_net_id);
			vn->name_type = args.u.name_type;
			err = 0;
		} else {
			err = -EINVAL;
		}
		break;

	case ADD_VLAN_CMD:
		err = -EPERM;
		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
			break;
		err = register_vlan_device(dev, args.u.VID);
		break;

	case DEL_VLAN_CMD:
		err = -EPERM;
		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
			break;
		unregister_vlan_dev(dev, NULL);
		err = 0;
		break;

	case GET_VLAN_REALDEV_NAME_CMD:
		err = 0;
		vlan_dev_get_realdev_name(dev, args.u.device2);
		if (copy_to_user(arg, &args,
				 sizeof(struct vlan_ioctl_args)))
			err = -EFAULT;
		break;

	case GET_VLAN_VID_CMD:
		err = 0;
		args.u.VID = vlan_dev_vlan_id(dev);
		if (copy_to_user(arg, &args,
				 sizeof(struct vlan_ioctl_args)))
		      err = -EFAULT;
		break;

	default:
		err = -EOPNOTSUPP;
		break;
	}
out:
	rtnl_unlock();
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
linus torvalds
linus torvalds
179
33.84%
1
4.76%
patrick mchardy
patrick mchardy
166
31.38%
7
33.33%
ben greear
ben greear
109
20.60%
1
4.76%
eric w. biederman
eric w. biederman
36
6.81%
2
9.52%
pavel emelianov
pavel emelianov
19
3.59%
3
14.29%
andrew morton
andrew morton
8
1.51%
1
4.76%
al viro
al viro
3
0.57%
1
4.76%
joonwoo park
joonwoo park
3
0.57%
1
4.76%
mika kukkonen
mika kukkonen
2
0.38%
1
4.76%
eric dumazet
eric dumazet
2
0.38%
1
4.76%
david s. miller
david s. miller
1
0.19%
1
4.76%
stephen hemminger
stephen hemminger
1
0.19%
1
4.76%
Total
529
100.00%
21
100.00%



static struct sk_buff **vlan_gro_receive(struct sk_buff **head,
					 struct sk_buff *skb)
{
	struct sk_buff *p, **pp = NULL;
	struct vlan_hdr *vhdr;
	unsigned int hlen, off_vlan;
	const struct packet_offload *ptype;
	__be16 type;
	int flush = 1;

	off_vlan = skb_gro_offset(skb);
	hlen = off_vlan + sizeof(*vhdr);
	vhdr = skb_gro_header_fast(skb, off_vlan);
	if (skb_gro_header_hard(skb, hlen)) {
		vhdr = skb_gro_header_slow(skb, hlen, off_vlan);
		if (unlikely(!vhdr))
			goto out;
	}

	type = vhdr->h_vlan_encapsulated_proto;

	rcu_read_lock();
	ptype = gro_find_receive_by_type(type);
	if (!ptype)
		goto out_unlock;

	flush = 0;

	for (p = *head; p; p = p->next) {
		struct vlan_hdr *vhdr2;

		if (!NAPI_GRO_CB(p)->same_flow)
			continue;

		vhdr2 = (struct vlan_hdr *)(p->data + off_vlan);
		if (compare_vlan_header(vhdr, vhdr2))
			NAPI_GRO_CB(p)->same_flow = 0;
	}

	skb_gro_pull(skb, sizeof(*vhdr));
	skb_gro_postpull_rcsum(skb, vhdr, sizeof(*vhdr));
	pp = ptype->callbacks.gro_receive(head, skb);

out_unlock:
	rcu_read_unlock();
out:
	NAPI_GRO_CB(skb)->flush |= flush;

	return pp;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
toshiaki makita
toshiaki makita
265
100.00%
1
100.00%
Total
265
100.00%
1
100.00%



static int vlan_gro_complete(struct sk_buff *skb, int nhoff)
{
	struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data + nhoff);
	__be16 type = vhdr->h_vlan_encapsulated_proto;
	struct packet_offload *ptype;
	int err = -ENOENT;

	rcu_read_lock();
	ptype = gro_find_complete_by_type(type);
	if (ptype)
		err = ptype->callbacks.gro_complete(skb, nhoff + sizeof(*vhdr));

	rcu_read_unlock();
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
toshiaki makita
toshiaki makita
89
100.00%
1
100.00%
Total
89
100.00%
1
100.00%


static struct packet_offload vlan_packet_offloads[] __read_mostly = {
	{
		.type = cpu_to_be16(ETH_P_8021Q),
		.priority = 10,
		.callbacks = {
			.gro_receive = vlan_gro_receive,
			.gro_complete = vlan_gro_complete,
                },
        },
	{
		.type = cpu_to_be16(ETH_P_8021AD),
		.priority = 10,
		.callbacks = {
			.gro_receive = vlan_gro_receive,
			.gro_complete = vlan_gro_complete,
                },
        },
};



static int __net_init vlan_init_net(struct net *net)
{
	struct vlan_net *vn = net_generic(net, vlan_net_id);
	int err;

	vn->name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD;

	err = vlan_proc_init(net);

	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pavel emelianov
pavel emelianov
37
86.05%
3
60.00%
eric w. biederman
eric w. biederman
5
11.63%
1
20.00%
alexey dobriyan
alexey dobriyan
1
2.33%
1
20.00%
Total
43
100.00%
5
100.00%



static void __net_exit vlan_exit_net(struct net *net)
{
	vlan_proc_cleanup(net);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pavel emelianov
pavel emelianov
16
94.12%
2
66.67%
alexey dobriyan
alexey dobriyan
1
5.88%
1
33.33%
Total
17
100.00%
3
100.00%


static struct pernet_operations vlan_net_ops = {
	.init = vlan_init_net,
	.exit = vlan_exit_net,
	.id   = &vlan_net_id,
	.size = sizeof(struct vlan_net),
};



static int __init vlan_proto_init(void)
{
	int err;
	unsigned int i;

	pr_info("%s v%s\n", vlan_fullname, vlan_version);

	err = register_pernet_subsys(&vlan_net_ops);
	if (err < 0)
		goto err0;

	err = register_netdevice_notifier(&vlan_notifier_block);
	if (err < 0)
		goto err2;

	err = vlan_gvrp_init();
	if (err < 0)
		goto err3;

	err = vlan_mvrp_init();
	if (err < 0)
		goto err4;

	err = vlan_netlink_init();
	if (err < 0)
		goto err5;

	for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++)
		dev_add_offload(&vlan_packet_offloads[i]);

	vlan_ioctl_set(vlan_ioctl_handler);
	return 0;

err5:
	vlan_mvrp_uninit();
err4:
	vlan_gvrp_uninit();
err3:
	unregister_netdevice_notifier(&vlan_notifier_block);
err2:
	unregister_pernet_subsys(&vlan_net_ops);
err0:
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
patrick mchardy
patrick mchardy
90
54.55%
2
28.57%
toshiaki makita
toshiaki makita
29
17.58%
1
14.29%
pavel emelianov
pavel emelianov
23
13.94%
1
14.29%
david ward
david ward
20
12.12%
1
14.29%
eric w. biederman
eric w. biederman
2
1.21%
1
14.29%
justin mattock
justin mattock
1
0.61%
1
14.29%
Total
165
100.00%
7
100.00%



static void __exit vlan_cleanup_module(void)
{
	unsigned int i;

	vlan_ioctl_set(NULL);

	for (i = 0; i < ARRAY_SIZE(vlan_packet_offloads); i++)
		dev_remove_offload(&vlan_packet_offloads[i]);

	vlan_netlink_fini();

	unregister_netdevice_notifier(&vlan_notifier_block);

	unregister_pernet_subsys(&vlan_net_ops);
	rcu_barrier(); /* Wait for completion of call_rcu()'s */

	vlan_mvrp_uninit();
	vlan_gvrp_uninit();
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
toshiaki makita
toshiaki makita
29
42.65%
1
14.29%
patrick mchardy
patrick mchardy
28
41.18%
2
28.57%
pavel emelianov
pavel emelianov
5
7.35%
1
14.29%
david ward
david ward
3
4.41%
1
14.29%
jesper dangaard brouer
jesper dangaard brouer
2
2.94%
1
14.29%
eric w. biederman
eric w. biederman
1
1.47%
1
14.29%
Total
68
100.00%
7
100.00%


module_init(vlan_proto_init);

module_exit(vlan_cleanup_module);

MODULE_LICENSE("GPL");

MODULE_VERSION(DRV_VERSION);
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
patrick mchardy
patrick mchardy
997
31.09%
28
24.35%
toshiaki makita
toshiaki makita
481
15.00%
1
0.87%
linus torvalds
linus torvalds
444
13.84%
1
0.87%
pavel emelianov
pavel emelianov
316
9.85%
8
6.96%
jiri pirko
jiri pirko
139
4.33%
9
7.83%
david s. miller
david s. miller
122
3.80%
2
1.74%
ben greear
ben greear
109
3.40%
1
0.87%
david ward
david ward
77
2.40%
1
0.87%
eric w. biederman
eric w. biederman
61
1.90%
5
4.35%
eric dumazet
eric dumazet
44
1.37%
8
6.96%
americo wang
americo wang
42
1.31%
3
2.61%
stephen hemminger
stephen hemminger
41
1.28%
6
5.22%
vlad yasevich
vlad yasevich
31
0.97%
3
2.61%
pedro garcia
pedro garcia
31
0.97%
1
0.87%
herbert xu
herbert xu
28
0.87%
1
0.87%
john fastabend
john fastabend
25
0.78%
1
0.87%
dan aloni
dan aloni
18
0.56%
1
0.87%
ben hutchings
ben hutchings
18
0.56%
2
1.74%
joe perches
joe perches
17
0.53%
3
2.61%
veaceslav falico
veaceslav falico
16
0.50%
2
1.74%
vasu dev
vasu dev
15
0.47%
1
0.87%
mike manning
mike manning
15
0.47%
1
0.87%
amir hanania
amir hanania
14
0.44%
1
0.87%
wang sheng-hui
wang sheng-hui
13
0.41%
1
0.87%
john w. linville
john w. linville
12
0.37%
1
0.87%
jay vosburgh
jay vosburgh
12
0.37%
1
0.87%
david lamparter
david lamparter
10
0.31%
1
0.87%
andrew morton
andrew morton
8
0.25%
1
0.87%
alexander duyck
alexander duyck
8
0.25%
1
0.87%
al viro
al viro
5
0.16%
2
1.74%
patrick mullaney
patrick mullaney
4
0.12%
1
0.87%
eran mann
eran mann
3
0.09%
1
0.87%
franck bui-huu
franck bui-huu
3
0.09%
1
0.87%
tejun heo
tejun heo
3
0.09%
1
0.87%
randy dunlap
randy dunlap
3
0.09%
1
0.87%
joonwoo park
joonwoo park
3
0.09%
1
0.87%
jesse gross
jesse gross
3
0.09%
1
0.87%
alan cox
alan cox
2
0.06%
1
0.87%
mika kukkonen
mika kukkonen
2
0.06%
1
0.87%
tom gundersen
tom gundersen
2
0.06%
1
0.87%
tommy s. christensen
tommy s. christensen
2
0.06%
1
0.87%
jesper dangaard brouer
jesper dangaard brouer
2
0.06%
1
0.87%
alexey dobriyan
alexey dobriyan
2
0.06%
1
0.87%
justin mattock
justin mattock
1
0.03%
1
0.87%
michal miroslaw
michal miroslaw
1
0.03%
1
0.87%
stefan rompf
stefan rompf
1
0.03%
1
0.87%
andries brouwer
andries brouwer
1
0.03%
1
0.87%
Total
3207
100.00%
115
100.00%
  
Directory: net/8021q

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