[thirdparty/linux.git] / include / linux / if_vlan.h

/*
 * VLAN		An implementation of 802.1Q VLAN tagging.
 *
 * Authors:	Ben Greear <greearb@candelatech.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.
 *
 */

#ifndef _LINUX_IF_VLAN_H_
#define _LINUX_IF_VLAN_H_

#ifdef __KERNEL__
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/rtnetlink.h>

#define VLAN_HLEN	4		/* The additional bytes (on top of the Ethernet header)
					 * that VLAN requires.
					 */
#define VLAN_ETH_ALEN	6		/* Octets in one ethernet addr	 */
#define VLAN_ETH_HLEN	18		/* Total octets in header.	 */
#define VLAN_ETH_ZLEN	64		/* Min. octets in frame sans FCS */

/*
 * According to 802.3ac, the packet can be 4 bytes longer. --Klika Jan
 */
#define VLAN_ETH_DATA_LEN	1500	/* Max. octets in payload	 */
#define VLAN_ETH_FRAME_LEN	1518	/* Max. octets in frame sans FCS */

/*
 * 	struct vlan_hdr - vlan header
 * 	@h_vlan_TCI: priority and VLAN ID
 *	@h_vlan_encapsulated_proto: packet type ID or len
 */
struct vlan_hdr {
	__be16	h_vlan_TCI;
	__be16	h_vlan_encapsulated_proto;
};

/**
 *	struct vlan_ethhdr - vlan ethernet header (ethhdr + vlan_hdr)
 *	@h_dest: destination ethernet address
 *	@h_source: source ethernet address
 *	@h_vlan_proto: ethernet protocol (always 0x8100)
 *	@h_vlan_TCI: priority and VLAN ID
 *	@h_vlan_encapsulated_proto: packet type ID or len
 */
struct vlan_ethhdr {
	unsigned char	h_dest[ETH_ALEN];
	unsigned char	h_source[ETH_ALEN];
	__be16		h_vlan_proto;
	__be16		h_vlan_TCI;
	__be16		h_vlan_encapsulated_proto;
};

#include <linux/skbuff.h>

static inline struct vlan_ethhdr *vlan_eth_hdr(const struct sk_buff *skb)
{
	return (struct vlan_ethhdr *)skb_mac_header(skb);
}

#define VLAN_PRIO_MASK		0xe000 /* Priority Code Point */
#define VLAN_PRIO_SHIFT		13
#define VLAN_CFI_MASK		0x1000 /* Canonical Format Indicator */
#define VLAN_TAG_PRESENT	VLAN_CFI_MASK
#define VLAN_VID_MASK		0x0fff /* VLAN Identifier */
#define VLAN_N_VID		4096

/* found in socket.c */
extern void vlan_ioctl_set(int (*hook)(struct net *, void __user *));

/* if this changes, algorithm will have to be reworked because this
 * depends on completely exhausting the VLAN identifier space.  Thus
 * it gives constant time look-up, but in many cases it wastes memory.
 */
#define VLAN_GROUP_ARRAY_SPLIT_PARTS  8
#define VLAN_GROUP_ARRAY_PART_LEN     (VLAN_N_VID/VLAN_GROUP_ARRAY_SPLIT_PARTS)

struct vlan_group {
	struct net_device	*real_dev; /* The ethernet(like) device
					    * the vlan is attached to.
					    */
	unsigned int		nr_vlans;
	struct hlist_node	hlist;	/* linked list */
	struct net_device **vlan_devices_arrays[VLAN_GROUP_ARRAY_SPLIT_PARTS];
	struct rcu_head		rcu;
};

static inline int is_vlan_dev(struct net_device *dev)
{
        return dev->priv_flags & IFF_802_1Q_VLAN;
}

#define vlan_tx_tag_present(__skb)	((__skb)->vlan_tci & VLAN_TAG_PRESENT)
#define vlan_tx_tag_get(__skb)		((__skb)->vlan_tci & ~VLAN_TAG_PRESENT)

#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)

extern struct net_device *__vlan_find_dev_deep(struct net_device *real_dev,
					       u16 vlan_id);
extern struct net_device *vlan_dev_real_dev(const struct net_device *dev);
extern u16 vlan_dev_vlan_id(const struct net_device *dev);

extern bool vlan_do_receive(struct sk_buff **skb);
extern struct sk_buff *vlan_untag(struct sk_buff *skb);

#else
static inline struct net_device *
__vlan_find_dev_deep(struct net_device *real_dev, u16 vlan_id)
{
	return NULL;
}

static inline struct net_device *vlan_dev_real_dev(const struct net_device *dev)
{
	BUG();
	return NULL;
}

static inline u16 vlan_dev_vlan_id(const struct net_device *dev)
{
	BUG();
	return 0;
}

static inline bool vlan_do_receive(struct sk_buff **skb)
{
	if ((*skb)->vlan_tci & VLAN_VID_MASK)
		(*skb)->pkt_type = PACKET_OTHERHOST;
	return false;
}

static inline struct sk_buff *vlan_untag(struct sk_buff *skb)
{
	return skb;
}
#endif

/**
 * vlan_insert_tag - regular VLAN tag inserting
 * @skb: skbuff to tag
 * @vlan_tci: VLAN TCI to insert
 *
 * Inserts the VLAN tag into @skb as part of the payload
 * Returns a VLAN tagged skb. If a new skb is created, @skb is freed.
 *
 * Following the skb_unshare() example, in case of error, the calling function
 * doesn't have to worry about freeing the original skb.
 *
 * Does not change skb->protocol so this function can be used during receive.
 */
static inline struct sk_buff *vlan_insert_tag(struct sk_buff *skb, u16 vlan_tci)
{
	struct vlan_ethhdr *veth;

	if (skb_cow_head(skb, VLAN_HLEN) < 0) {
		kfree_skb(skb);
		return NULL;
	}
	veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN);

	/* Move the mac addresses to the beginning of the new header. */
	memmove(skb->data, skb->data + VLAN_HLEN, 2 * VLAN_ETH_ALEN);
	skb->mac_header -= VLAN_HLEN;

	/* first, the ethernet type */
	veth->h_vlan_proto = htons(ETH_P_8021Q);

	/* now, the TCI */
	veth->h_vlan_TCI = htons(vlan_tci);

	return skb;
}

/**
 * __vlan_put_tag - regular VLAN tag inserting
 * @skb: skbuff to tag
 * @vlan_tci: VLAN TCI to insert
 *
 * Inserts the VLAN tag into @skb as part of the payload
 * Returns a VLAN tagged skb. If a new skb is created, @skb is freed.
 *
 * Following the skb_unshare() example, in case of error, the calling function
 * doesn't have to worry about freeing the original skb.
 */
static inline struct sk_buff *__vlan_put_tag(struct sk_buff *skb, u16 vlan_tci)
{
	skb = vlan_insert_tag(skb, vlan_tci);
	if (skb)
		skb->protocol = htons(ETH_P_8021Q);
	return skb;
}

/**
 * __vlan_hwaccel_put_tag - hardware accelerated VLAN inserting
 * @skb: skbuff to tag
 * @vlan_tci: VLAN TCI to insert
 *
 * Puts the VLAN TCI in @skb->vlan_tci and lets the device do the rest
 */
static inline struct sk_buff *__vlan_hwaccel_put_tag(struct sk_buff *skb,
						     u16 vlan_tci)
{
	skb->vlan_tci = VLAN_TAG_PRESENT | vlan_tci;
	return skb;
}

#define HAVE_VLAN_PUT_TAG

/**
 * vlan_put_tag - inserts VLAN tag according to device features
 * @skb: skbuff to tag
 * @vlan_tci: VLAN TCI to insert
 *
 * Assumes skb->dev is the target that will xmit this frame.
 * Returns a VLAN tagged skb.
 */
static inline struct sk_buff *vlan_put_tag(struct sk_buff *skb, u16 vlan_tci)
{
	if (skb->dev->features & NETIF_F_HW_VLAN_TX) {
		return __vlan_hwaccel_put_tag(skb, vlan_tci);
	} else {
		return __vlan_put_tag(skb, vlan_tci);
	}
}

/**
 * __vlan_get_tag - get the VLAN ID that is part of the payload
 * @skb: skbuff to query
 * @vlan_tci: buffer to store vlaue
 *
 * Returns error if the skb is not of VLAN type
 */
static inline int __vlan_get_tag(const struct sk_buff *skb, u16 *vlan_tci)
{
	struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb->data;

	if (veth->h_vlan_proto != htons(ETH_P_8021Q)) {
		return -EINVAL;
	}

	*vlan_tci = ntohs(veth->h_vlan_TCI);
	return 0;
}

/**
 * __vlan_hwaccel_get_tag - get the VLAN ID that is in @skb->cb[]
 * @skb: skbuff to query
 * @vlan_tci: buffer to store vlaue
 *
 * Returns error if @skb->vlan_tci is not set correctly
 */
static inline int __vlan_hwaccel_get_tag(const struct sk_buff *skb,
					 u16 *vlan_tci)
{
	if (vlan_tx_tag_present(skb)) {
		*vlan_tci = vlan_tx_tag_get(skb);
		return 0;
	} else {
		*vlan_tci = 0;
		return -EINVAL;
	}
}

#define HAVE_VLAN_GET_TAG

/**
 * vlan_get_tag - get the VLAN ID from the skb
 * @skb: skbuff to query
 * @vlan_tci: buffer to store vlaue
 *
 * Returns error if the skb is not VLAN tagged
 */
static inline int vlan_get_tag(const struct sk_buff *skb, u16 *vlan_tci)
{
	if (skb->dev->features & NETIF_F_HW_VLAN_TX) {
		return __vlan_hwaccel_get_tag(skb, vlan_tci);
	} else {
		return __vlan_get_tag(skb, vlan_tci);
	}
}

/**
 * vlan_get_protocol - get protocol EtherType.
 * @skb: skbuff to query
 *
 * Returns the EtherType of the packet, regardless of whether it is
 * vlan encapsulated (normal or hardware accelerated) or not.
 */
static inline __be16 vlan_get_protocol(const struct sk_buff *skb)
{
	__be16 protocol = 0;

	if (vlan_tx_tag_present(skb) ||
	     skb->protocol != cpu_to_be16(ETH_P_8021Q))
		protocol = skb->protocol;
	else {
		__be16 proto, *protop;
		protop = skb_header_pointer(skb, offsetof(struct vlan_ethhdr,
						h_vlan_encapsulated_proto),
						sizeof(proto), &proto);
		if (likely(protop))
			protocol = *protop;
	}

	return protocol;
}
#endif /* __KERNEL__ */

/* VLAN IOCTLs are found in sockios.h */

/* Passed in vlan_ioctl_args structure to determine behaviour. */
enum vlan_ioctl_cmds {
	ADD_VLAN_CMD,
	DEL_VLAN_CMD,
	SET_VLAN_INGRESS_PRIORITY_CMD,
	SET_VLAN_EGRESS_PRIORITY_CMD,
	GET_VLAN_INGRESS_PRIORITY_CMD,
	GET_VLAN_EGRESS_PRIORITY_CMD,
	SET_VLAN_NAME_TYPE_CMD,
	SET_VLAN_FLAG_CMD,
	GET_VLAN_REALDEV_NAME_CMD, /* If this works, you know it's a VLAN device, btw */
	GET_VLAN_VID_CMD /* Get the VID of this VLAN (specified by name) */
};

enum vlan_flags {
	VLAN_FLAG_REORDER_HDR	= 0x1,
	VLAN_FLAG_GVRP		= 0x2,
	VLAN_FLAG_LOOSE_BINDING	= 0x4,
};

enum vlan_name_types {
	VLAN_NAME_TYPE_PLUS_VID, /* Name will look like:  vlan0005 */
	VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like:  eth1.0005 */
	VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like:  vlan5 */
	VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like:  eth0.5 */
	VLAN_NAME_TYPE_HIGHEST
};

struct vlan_ioctl_args {
	int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */
	char device1[24];

        union {
		char device2[24];
		int VID;
		unsigned int skb_priority;
		unsigned int name_type;
		unsigned int bind_type;
		unsigned int flag; /* Matches vlan_dev_info flags */
        } u;

	short vlan_qos;   
};

#endif /* !(_LINUX_IF_VLAN_H_) */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* VLAN An implementation of 802.1Q VLAN tagging.
	3	*
	4	* Authors: Ben Greear <greearb@candelatech.com>
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* as published by the Free Software Foundation; either version
	9	* 2 of the License, or (at your option) any later version.
	10	*
	11	*/
	12
	13	#ifndef _LINUX_IF_VLAN_H_
	14	#define _LINUX_IF_VLAN_H_
	15
	16	#ifdef __KERNEL__
1da177e4	17	#include <linux/netdevice.h>
0610d11b	18	#include <linux/etherdevice.h>
65ac6a5f	19	#include <linux/rtnetlink.h>
1da177e4 LT	20
	21	#define VLAN_HLEN 4 /* The additional bytes (on top of the Ethernet header)
	22	* that VLAN requires.
	23	*/
	24	#define VLAN_ETH_ALEN 6 /* Octets in one ethernet addr */
	25	#define VLAN_ETH_HLEN 18 /* Total octets in header. */
	26	#define VLAN_ETH_ZLEN 64 /* Min. octets in frame sans FCS */
	27
	28	/*
	29	* According to 802.3ac, the packet can be 4 bytes longer. --Klika Jan
	30	*/
	31	#define VLAN_ETH_DATA_LEN 1500 /* Max. octets in payload */
	32	#define VLAN_ETH_FRAME_LEN 1518 /* Max. octets in frame sans FCS */
	33
740c15d0 PM	34	/*
	35	* struct vlan_hdr - vlan header
	36	* @h_vlan_TCI: priority and VLAN ID
	37	* @h_vlan_encapsulated_proto: packet type ID or len
	38	*/
	39	struct vlan_hdr {
	40	__be16 h_vlan_TCI;
	41	__be16 h_vlan_encapsulated_proto;
	42	};
	43
	44	/**
	45	* struct vlan_ethhdr - vlan ethernet header (ethhdr + vlan_hdr)
	46	* @h_dest: destination ethernet address
	47	* @h_source: source ethernet address
	48	* @h_vlan_proto: ethernet protocol (always 0x8100)
	49	* @h_vlan_TCI: priority and VLAN ID
	50	* @h_vlan_encapsulated_proto: packet type ID or len
	51	*/
1da177e4	52	struct vlan_ethhdr {
740c15d0 PM	53	unsigned char h_dest[ETH_ALEN];
	54	unsigned char h_source[ETH_ALEN];
	55	__be16 h_vlan_proto;
	56	__be16 h_vlan_TCI;
	57	__be16 h_vlan_encapsulated_proto;
1da177e4 LT	58	};
	59
	60	#include <linux/skbuff.h>
	61
	62	static inline struct vlan_ethhdr vlan_eth_hdr(const struct sk_buff skb)
	63	{
98e399f8	64	return (struct vlan_ethhdr *)skb_mac_header(skb);
1da177e4 LT	65	}
1da177e4 LT	66
05423b24 ED	67	#define VLAN_PRIO_MASK 0xe000 /* Priority Code Point */
	68	#define VLAN_PRIO_SHIFT 13
	69	#define VLAN_CFI_MASK 0x1000 /* Canonical Format Indicator */
	70	#define VLAN_TAG_PRESENT VLAN_CFI_MASK
	71	#define VLAN_VID_MASK 0x0fff /* VLAN Identifier */
b738127d	72	#define VLAN_N_VID 4096
1da177e4 LT	73
1da177e4 LT	74	/* found in socket.c */
881d966b	75	extern void vlan_ioctl_set(int (hook)(struct net , void __user *));
1da177e4	76
1da177e4 LT	77	/* if this changes, algorithm will have to be reworked because this
	78	* depends on completely exhausting the VLAN identifier space. Thus
	79	* it gives constant time look-up, but in many cases it wastes memory.
	80	*/
5c15bdec	81	#define VLAN_GROUP_ARRAY_SPLIT_PARTS 8
b738127d	82	#define VLAN_GROUP_ARRAY_PART_LEN (VLAN_N_VID/VLAN_GROUP_ARRAY_SPLIT_PARTS)
1da177e4 LT	83
1da177e4 LT	84	struct vlan_group {
a9fde260 PE	85	struct net_device real_dev; / The ethernet(like) device
	86	* the vlan is attached to.
	87	*/
af301517	88	unsigned int nr_vlans;
1da177e4	89	struct hlist_node hlist; /* linked list */
5c15bdec	90	struct net_device **vlan_devices_arrays[VLAN_GROUP_ARRAY_SPLIT_PARTS];
1da177e4 LT	91	struct rcu_head rcu;
	92	};
	93
6dcbbe25 NH	94	static inline int is_vlan_dev(struct net_device *dev)
	95	{
	96	return dev->priv_flags & IFF_802_1Q_VLAN;
	97	}
	98
05423b24 ED	99	#define vlan_tx_tag_present(__skb) ((__skb)->vlan_tci & VLAN_TAG_PRESENT)
05423b24 ED	100	#define vlan_tx_tag_get(__skb) ((__skb)->vlan_tci & ~VLAN_TAG_PRESENT)
1da177e4	101
7750f403	102	#if defined(CONFIG_VLAN_8021Q) \|\| defined(CONFIG_VLAN_8021Q_MODULE)
65ac6a5f	103
cec9c133 JP	104	extern struct net_device __vlan_find_dev_deep(struct net_device real_dev,
cec9c133 JP	105	u16 vlan_id);
22d1ba74 PM	106	extern struct net_device vlan_dev_real_dev(const struct net_device dev);
	107	extern u16 vlan_dev_vlan_id(const struct net_device *dev);
	108
bcc6d479 JP	109	extern bool vlan_do_receive(struct sk_buff **skb);
bcc6d479 JP	110	extern struct sk_buff vlan_untag(struct sk_buff skb);
9b22ea56	111
7750f403	112	#else
cec9c133 JP	113	static inline struct net_device *
	114	__vlan_find_dev_deep(struct net_device *real_dev, u16 vlan_id)
	115	{
	116	return NULL;
	117	}
	118
22d1ba74 PM	119	static inline struct net_device vlan_dev_real_dev(const struct net_device dev)
	120	{
	121	BUG();
	122	return NULL;
	123	}
	124
	125	static inline u16 vlan_dev_vlan_id(const struct net_device *dev)
	126	{
	127	BUG();
	128	return 0;
	129	}
	130
bcc6d479	131	static inline bool vlan_do_receive(struct sk_buff **skb)
9b22ea56	132	{
0988c4c7 JG	133	if ((*skb)->vlan_tci & VLAN_VID_MASK)
0988c4c7 JG	134	(*skb)->pkt_type = PACKET_OTHERHOST;
3701e513	135	return false;
9b22ea56	136	}
e1c096e2	137
6139e75f	138	static inline struct sk_buff vlan_untag(struct sk_buff skb)
bcc6d479 JP	139	{
	140	return skb;
	141	}
7750f403	142	#endif
1da177e4	143
1da177e4	144	/**
0b5c9db1	145	* vlan_insert_tag - regular VLAN tag inserting
1da177e4	146	* @skb: skbuff to tag
9bb8582e	147	* @vlan_tci: VLAN TCI to insert
1da177e4 LT	148	*
	149	* Inserts the VLAN tag into @skb as part of the payload
	150	* Returns a VLAN tagged skb. If a new skb is created, @skb is freed.
9bb8582e	151	*
1da177e4 LT	152	* Following the skb_unshare() example, in case of error, the calling function
1da177e4 LT	153	* doesn't have to worry about freeing the original skb.
0b5c9db1 JP	154	*
0b5c9db1 JP	155	* Does not change skb->protocol so this function can be used during receive.
1da177e4	156	*/
0b5c9db1	157	static inline struct sk_buff vlan_insert_tag(struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	158	{
	159	struct vlan_ethhdr *veth;
	160
11a100f8 PM	161	if (skb_cow_head(skb, VLAN_HLEN) < 0) {
	162	kfree_skb(skb);
	163	return NULL;
1da177e4	164	}
1da177e4 LT	165	veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN);
	166
	167	/* Move the mac addresses to the beginning of the new header. */
	168	memmove(skb->data, skb->data + VLAN_HLEN, 2 * VLAN_ETH_ALEN);
e4dd6188	169	skb->mac_header -= VLAN_HLEN;
1da177e4 LT	170
1da177e4 LT	171	/* first, the ethernet type */
57d3ae84	172	veth->h_vlan_proto = htons(ETH_P_8021Q);
1da177e4	173
9bb8582e PM	174	/* now, the TCI */
9bb8582e PM	175	veth->h_vlan_TCI = htons(vlan_tci);
1da177e4	176
0b5c9db1 JP	177	return skb;
0b5c9db1 JP	178	}
1da177e4	179
0b5c9db1 JP	180	/**
	181	* __vlan_put_tag - regular VLAN tag inserting
	182	* @skb: skbuff to tag
	183	* @vlan_tci: VLAN TCI to insert
	184	*
	185	* Inserts the VLAN tag into @skb as part of the payload
	186	* Returns a VLAN tagged skb. If a new skb is created, @skb is freed.
	187	*
	188	* Following the skb_unshare() example, in case of error, the calling function
	189	* doesn't have to worry about freeing the original skb.
	190	*/
	191	static inline struct sk_buff __vlan_put_tag(struct sk_buff skb, u16 vlan_tci)
	192	{
	193	skb = vlan_insert_tag(skb, vlan_tci);
	194	if (skb)
	195	skb->protocol = htons(ETH_P_8021Q);
1da177e4 LT	196	return skb;
	197	}
	198
	199	/**
	200	* __vlan_hwaccel_put_tag - hardware accelerated VLAN inserting
	201	* @skb: skbuff to tag
9bb8582e	202	* @vlan_tci: VLAN TCI to insert
1da177e4	203	*
6aa895b0	204	* Puts the VLAN TCI in @skb->vlan_tci and lets the device do the rest
1da177e4	205	*/
9bb8582e PM	206	static inline struct sk_buff __vlan_hwaccel_put_tag(struct sk_buff skb,
9bb8582e PM	207	u16 vlan_tci)
1da177e4	208	{
05423b24	209	skb->vlan_tci = VLAN_TAG_PRESENT \| vlan_tci;
1da177e4 LT	210	return skb;
	211	}
	212
	213	#define HAVE_VLAN_PUT_TAG
	214
	215	/**
	216	* vlan_put_tag - inserts VLAN tag according to device features
	217	* @skb: skbuff to tag
9bb8582e	218	* @vlan_tci: VLAN TCI to insert
1da177e4 LT	219	*
	220	* Assumes skb->dev is the target that will xmit this frame.
	221	* Returns a VLAN tagged skb.
	222	*/
9bb8582e	223	static inline struct sk_buff vlan_put_tag(struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	224	{
1da177e4 LT	225	if (skb->dev->features & NETIF_F_HW_VLAN_TX) {
9bb8582e	226	return __vlan_hwaccel_put_tag(skb, vlan_tci);
1da177e4	227	} else {
9bb8582e	228	return __vlan_put_tag(skb, vlan_tci);
1da177e4 LT	229	}
	230	}
	231
	232	/**
	233	* __vlan_get_tag - get the VLAN ID that is part of the payload
	234	* @skb: skbuff to query
9bb8582e PM	235	* @vlan_tci: buffer to store vlaue
9bb8582e PM	236	*
1da177e4 LT	237	* Returns error if the skb is not of VLAN type
1da177e4 LT	238	*/
9bb8582e	239	static inline int __vlan_get_tag(const struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	240	{
	241	struct vlan_ethhdr veth = (struct vlan_ethhdr )skb->data;
	242
57d3ae84	243	if (veth->h_vlan_proto != htons(ETH_P_8021Q)) {
1da177e4 LT	244	return -EINVAL;
	245	}
	246
9bb8582e	247	*vlan_tci = ntohs(veth->h_vlan_TCI);
1da177e4 LT	248	return 0;
	249	}
	250
	251	/**
	252	* __vlan_hwaccel_get_tag - get the VLAN ID that is in @skb->cb[]
	253	* @skb: skbuff to query
9bb8582e PM	254	* @vlan_tci: buffer to store vlaue
9bb8582e PM	255	*
6aa895b0	256	* Returns error if @skb->vlan_tci is not set correctly
1da177e4	257	*/
18149935	258	static inline int __vlan_hwaccel_get_tag(const struct sk_buff *skb,
9bb8582e	259	u16 *vlan_tci)
1da177e4	260	{
6aa895b0	261	if (vlan_tx_tag_present(skb)) {
05423b24	262	*vlan_tci = vlan_tx_tag_get(skb);
1da177e4 LT	263	return 0;
1da177e4 LT	264	} else {
9bb8582e	265	*vlan_tci = 0;
1da177e4 LT	266	return -EINVAL;
	267	}
	268	}
	269
	270	#define HAVE_VLAN_GET_TAG
	271
	272	/**
	273	* vlan_get_tag - get the VLAN ID from the skb
	274	* @skb: skbuff to query
9bb8582e PM	275	* @vlan_tci: buffer to store vlaue
9bb8582e PM	276	*
1da177e4 LT	277	* Returns error if the skb is not VLAN tagged
1da177e4 LT	278	*/
9bb8582e	279	static inline int vlan_get_tag(const struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	280	{
1da177e4 LT	281	if (skb->dev->features & NETIF_F_HW_VLAN_TX) {
9bb8582e	282	return __vlan_hwaccel_get_tag(skb, vlan_tci);
1da177e4	283	} else {
9bb8582e	284	return __vlan_get_tag(skb, vlan_tci);
1da177e4 LT	285	}
	286	}
	287
0a85df00 HZ	288	/**
	289	* vlan_get_protocol - get protocol EtherType.
	290	* @skb: skbuff to query
	291	*
	292	* Returns the EtherType of the packet, regardless of whether it is
	293	* vlan encapsulated (normal or hardware accelerated) or not.
	294	*/
	295	static inline __be16 vlan_get_protocol(const struct sk_buff *skb)
	296	{
	297	__be16 protocol = 0;
	298
	299	if (vlan_tx_tag_present(skb) \|\|
	300	skb->protocol != cpu_to_be16(ETH_P_8021Q))
	301	protocol = skb->protocol;
	302	else {
	303	__be16 proto, *protop;
	304	protop = skb_header_pointer(skb, offsetof(struct vlan_ethhdr,
	305	h_vlan_encapsulated_proto),
	306	sizeof(proto), &proto);
	307	if (likely(protop))
	308	protocol = *protop;
	309	}
	310
	311	return protocol;
	312	}
1da177e4 LT	313	#endif /* __KERNEL__ */
	314
	315	/* VLAN IOCTLs are found in sockios.h */
	316
	317	/* Passed in vlan_ioctl_args structure to determine behaviour. */
	318	enum vlan_ioctl_cmds {
	319	ADD_VLAN_CMD,
	320	DEL_VLAN_CMD,
	321	SET_VLAN_INGRESS_PRIORITY_CMD,
	322	SET_VLAN_EGRESS_PRIORITY_CMD,
	323	GET_VLAN_INGRESS_PRIORITY_CMD,
	324	GET_VLAN_EGRESS_PRIORITY_CMD,
	325	SET_VLAN_NAME_TYPE_CMD,
	326	SET_VLAN_FLAG_CMD,
	327	GET_VLAN_REALDEV_NAME_CMD, /* If this works, you know it's a VLAN device, btw */
	328	GET_VLAN_VID_CMD /* Get the VID of this VLAN (specified by name) */
	329	};
	330
a4bf3af4 PM	331	enum vlan_flags {
a4bf3af4 PM	332	VLAN_FLAG_REORDER_HDR = 0x1,
70c03b49	333	VLAN_FLAG_GVRP = 0x2,
5e756593	334	VLAN_FLAG_LOOSE_BINDING = 0x4,
a4bf3af4 PM	335	};
a4bf3af4 PM	336
1da177e4 LT	337	enum vlan_name_types {
	338	VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */
	339	VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */
	340	VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */
	341	VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */
	342	VLAN_NAME_TYPE_HIGHEST
	343	};
	344
	345	struct vlan_ioctl_args {
	346	int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */
	347	char device1[24];
	348
	349	union {
	350	char device2[24];
	351	int VID;
	352	unsigned int skb_priority;
	353	unsigned int name_type;
	354	unsigned int bind_type;
	355	unsigned int flag; /* Matches vlan_dev_info flags */
	356	} u;
	357
	358	short vlan_qos;
	359	};
	360
	361	#endif /* !(_LINUX_IF_VLAN_H_) */