[GitHub/mt8127/android_kernel_alcatel_ttab.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 *));

struct vlan_info;

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, bool last_handler);
extern struct sk_buff *vlan_untag(struct sk_buff *skb);

extern int vlan_vid_add(struct net_device *dev, unsigned short vid);
extern void vlan_vid_del(struct net_device *dev, unsigned short vid);

#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, bool last_handler)
{
	if (((*skb)->vlan_tci & VLAN_VID_MASK) && last_handler)
		(*skb)->pkt_type = PACKET_OTHERHOST;
	return false;
}

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

static inline int vlan_vid_add(struct net_device *dev, unsigned short vid)
{
	return 0;
}

static inline void vlan_vid_del(struct net_device *dev, unsigned short vid)
{
}
#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;
}

static inline void vlan_set_encap_proto(struct sk_buff *skb,
					struct vlan_hdr *vhdr)
{
	__be16 proto;
	unsigned char *rawp;

	/*
	 * Was a VLAN packet, grab the encapsulated protocol, which the layer
	 * three protocols care about.
	 */

	proto = vhdr->h_vlan_encapsulated_proto;
	if (ntohs(proto) >= 1536) {
		skb->protocol = proto;
		return;
	}

	rawp = skb->data;
	if (*(unsigned short *) rawp == 0xFFFF)
		/*
		 * This is a magic hack to spot IPX packets. Older Novell
		 * breaks the protocol design and runs IPX over 802.3 without
		 * an 802.2 LLC layer. We look for FFFF which isn't a used
		 * 802.2 SSAP/DSAP. This won't work for fault tolerant netware
		 * but does for the rest.
		 */
		skb->protocol = htons(ETH_P_802_3);
	else
		/*
		 * Real 802.2 LLC
		 */
		skb->protocol = htons(ETH_P_802_2);
}
#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_priv 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
5b9ea6e0	77	struct vlan_info;
1da177e4	78
6dcbbe25 NH	79	static inline int is_vlan_dev(struct net_device *dev)
	80	{
	81	return dev->priv_flags & IFF_802_1Q_VLAN;
	82	}
	83
05423b24 ED	84	#define vlan_tx_tag_present(__skb) ((__skb)->vlan_tci & VLAN_TAG_PRESENT)
05423b24 ED	85	#define vlan_tx_tag_get(__skb) ((__skb)->vlan_tci & ~VLAN_TAG_PRESENT)
1da177e4	86
7750f403	87	#if defined(CONFIG_VLAN_8021Q) \|\| defined(CONFIG_VLAN_8021Q_MODULE)
65ac6a5f	88
cec9c133 JP	89	extern struct net_device __vlan_find_dev_deep(struct net_device real_dev,
cec9c133 JP	90	u16 vlan_id);
22d1ba74 PM	91	extern struct net_device vlan_dev_real_dev(const struct net_device dev);
	92	extern u16 vlan_dev_vlan_id(const struct net_device *dev);
	93
6a32e4f9	94	extern bool vlan_do_receive(struct sk_buff **skb, bool last_handler);
bcc6d479	95	extern struct sk_buff vlan_untag(struct sk_buff skb);
9b22ea56	96
87002b03 JP	97	extern int vlan_vid_add(struct net_device *dev, unsigned short vid);
	98	extern void vlan_vid_del(struct net_device *dev, unsigned short vid);
	99
7750f403	100	#else
cec9c133 JP	101	static inline struct net_device *
	102	__vlan_find_dev_deep(struct net_device *real_dev, u16 vlan_id)
	103	{
	104	return NULL;
	105	}
	106
22d1ba74 PM	107	static inline struct net_device vlan_dev_real_dev(const struct net_device dev)
	108	{
	109	BUG();
	110	return NULL;
	111	}
	112
	113	static inline u16 vlan_dev_vlan_id(const struct net_device *dev)
	114	{
	115	BUG();
	116	return 0;
	117	}
	118
6a32e4f9	119	static inline bool vlan_do_receive(struct sk_buff **skb, bool last_handler)
9b22ea56	120	{
6a32e4f9	121	if (((*skb)->vlan_tci & VLAN_VID_MASK) && last_handler)
0988c4c7	122	(*skb)->pkt_type = PACKET_OTHERHOST;
3701e513	123	return false;
9b22ea56	124	}
e1c096e2	125
6139e75f	126	static inline struct sk_buff vlan_untag(struct sk_buff skb)
bcc6d479 JP	127	{
	128	return skb;
	129	}
87002b03 JP	130
	131	static inline int vlan_vid_add(struct net_device *dev, unsigned short vid)
	132	{
	133	return 0;
	134	}
	135
	136	static inline void vlan_vid_del(struct net_device *dev, unsigned short vid)
	137	{
	138	}
7750f403	139	#endif
1da177e4	140
1da177e4	141	/**
0b5c9db1	142	* vlan_insert_tag - regular VLAN tag inserting
1da177e4	143	* @skb: skbuff to tag
9bb8582e	144	* @vlan_tci: VLAN TCI to insert
1da177e4 LT	145	*
	146	* Inserts the VLAN tag into @skb as part of the payload
	147	* Returns a VLAN tagged skb. If a new skb is created, @skb is freed.
9bb8582e	148	*
1da177e4 LT	149	* Following the skb_unshare() example, in case of error, the calling function
1da177e4 LT	150	* doesn't have to worry about freeing the original skb.
0b5c9db1 JP	151	*
0b5c9db1 JP	152	* Does not change skb->protocol so this function can be used during receive.
1da177e4	153	*/
0b5c9db1	154	static inline struct sk_buff vlan_insert_tag(struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	155	{
	156	struct vlan_ethhdr *veth;
	157
11a100f8 PM	158	if (skb_cow_head(skb, VLAN_HLEN) < 0) {
	159	kfree_skb(skb);
	160	return NULL;
1da177e4	161	}
1da177e4 LT	162	veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN);
	163
	164	/* Move the mac addresses to the beginning of the new header. */
	165	memmove(skb->data, skb->data + VLAN_HLEN, 2 * VLAN_ETH_ALEN);
e4dd6188	166	skb->mac_header -= VLAN_HLEN;
1da177e4 LT	167
1da177e4 LT	168	/* first, the ethernet type */
57d3ae84	169	veth->h_vlan_proto = htons(ETH_P_8021Q);
1da177e4	170
9bb8582e PM	171	/* now, the TCI */
9bb8582e PM	172	veth->h_vlan_TCI = htons(vlan_tci);
1da177e4	173
0b5c9db1 JP	174	return skb;
0b5c9db1 JP	175	}
1da177e4	176
0b5c9db1 JP	177	/**
	178	* __vlan_put_tag - regular VLAN tag inserting
	179	* @skb: skbuff to tag
	180	* @vlan_tci: VLAN TCI to insert
	181	*
	182	* Inserts the VLAN tag into @skb as part of the payload
	183	* Returns a VLAN tagged skb. If a new skb is created, @skb is freed.
	184	*
	185	* Following the skb_unshare() example, in case of error, the calling function
	186	* doesn't have to worry about freeing the original skb.
	187	*/
	188	static inline struct sk_buff __vlan_put_tag(struct sk_buff skb, u16 vlan_tci)
	189	{
	190	skb = vlan_insert_tag(skb, vlan_tci);
	191	if (skb)
	192	skb->protocol = htons(ETH_P_8021Q);
1da177e4 LT	193	return skb;
	194	}
	195
	196	/**
	197	* __vlan_hwaccel_put_tag - hardware accelerated VLAN inserting
	198	* @skb: skbuff to tag
9bb8582e	199	* @vlan_tci: VLAN TCI to insert
1da177e4	200	*
6aa895b0	201	* Puts the VLAN TCI in @skb->vlan_tci and lets the device do the rest
1da177e4	202	*/
9bb8582e PM	203	static inline struct sk_buff __vlan_hwaccel_put_tag(struct sk_buff skb,
9bb8582e PM	204	u16 vlan_tci)
1da177e4	205	{
05423b24	206	skb->vlan_tci = VLAN_TAG_PRESENT \| vlan_tci;
1da177e4 LT	207	return skb;
	208	}
	209
	210	#define HAVE_VLAN_PUT_TAG
	211
	212	/**
	213	* vlan_put_tag - inserts VLAN tag according to device features
	214	* @skb: skbuff to tag
9bb8582e	215	* @vlan_tci: VLAN TCI to insert
1da177e4 LT	216	*
	217	* Assumes skb->dev is the target that will xmit this frame.
	218	* Returns a VLAN tagged skb.
	219	*/
9bb8582e	220	static inline struct sk_buff vlan_put_tag(struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	221	{
1da177e4 LT	222	if (skb->dev->features & NETIF_F_HW_VLAN_TX) {
9bb8582e	223	return __vlan_hwaccel_put_tag(skb, vlan_tci);
1da177e4	224	} else {
9bb8582e	225	return __vlan_put_tag(skb, vlan_tci);
1da177e4 LT	226	}
	227	}
	228
	229	/**
	230	* __vlan_get_tag - get the VLAN ID that is part of the payload
	231	* @skb: skbuff to query
9bb8582e PM	232	* @vlan_tci: buffer to store vlaue
9bb8582e PM	233	*
1da177e4 LT	234	* Returns error if the skb is not of VLAN type
1da177e4 LT	235	*/
9bb8582e	236	static inline int __vlan_get_tag(const struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	237	{
	238	struct vlan_ethhdr veth = (struct vlan_ethhdr )skb->data;
	239
57d3ae84	240	if (veth->h_vlan_proto != htons(ETH_P_8021Q)) {
1da177e4 LT	241	return -EINVAL;
	242	}
	243
9bb8582e	244	*vlan_tci = ntohs(veth->h_vlan_TCI);
1da177e4 LT	245	return 0;
	246	}
	247
	248	/**
	249	* __vlan_hwaccel_get_tag - get the VLAN ID that is in @skb->cb[]
	250	* @skb: skbuff to query
9bb8582e PM	251	* @vlan_tci: buffer to store vlaue
9bb8582e PM	252	*
6aa895b0	253	* Returns error if @skb->vlan_tci is not set correctly
1da177e4	254	*/
18149935	255	static inline int __vlan_hwaccel_get_tag(const struct sk_buff *skb,
9bb8582e	256	u16 *vlan_tci)
1da177e4	257	{
6aa895b0	258	if (vlan_tx_tag_present(skb)) {
05423b24	259	*vlan_tci = vlan_tx_tag_get(skb);
1da177e4 LT	260	return 0;
1da177e4 LT	261	} else {
9bb8582e	262	*vlan_tci = 0;
1da177e4 LT	263	return -EINVAL;
	264	}
	265	}
	266
	267	#define HAVE_VLAN_GET_TAG
	268
	269	/**
	270	* vlan_get_tag - get the VLAN ID from the skb
	271	* @skb: skbuff to query
9bb8582e PM	272	* @vlan_tci: buffer to store vlaue
9bb8582e PM	273	*
1da177e4 LT	274	* Returns error if the skb is not VLAN tagged
1da177e4 LT	275	*/
9bb8582e	276	static inline int vlan_get_tag(const struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	277	{
1da177e4 LT	278	if (skb->dev->features & NETIF_F_HW_VLAN_TX) {
9bb8582e	279	return __vlan_hwaccel_get_tag(skb, vlan_tci);
1da177e4	280	} else {
9bb8582e	281	return __vlan_get_tag(skb, vlan_tci);
1da177e4 LT	282	}
	283	}
	284
0a85df00 HZ	285	/**
	286	* vlan_get_protocol - get protocol EtherType.
	287	* @skb: skbuff to query
	288	*
	289	* Returns the EtherType of the packet, regardless of whether it is
	290	* vlan encapsulated (normal or hardware accelerated) or not.
	291	*/
	292	static inline __be16 vlan_get_protocol(const struct sk_buff *skb)
	293	{
	294	__be16 protocol = 0;
	295
	296	if (vlan_tx_tag_present(skb) \|\|
	297	skb->protocol != cpu_to_be16(ETH_P_8021Q))
	298	protocol = skb->protocol;
	299	else {
	300	__be16 proto, *protop;
	301	protop = skb_header_pointer(skb, offsetof(struct vlan_ethhdr,
	302	h_vlan_encapsulated_proto),
	303	sizeof(proto), &proto);
	304	if (likely(protop))
	305	protocol = *protop;
	306	}
	307
	308	return protocol;
	309	}
396cf943 PS	310
	311	static inline void vlan_set_encap_proto(struct sk_buff *skb,
	312	struct vlan_hdr *vhdr)
	313	{
	314	__be16 proto;
	315	unsigned char *rawp;
	316
	317	/*
	318	* Was a VLAN packet, grab the encapsulated protocol, which the layer
	319	* three protocols care about.
	320	*/
	321
	322	proto = vhdr->h_vlan_encapsulated_proto;
	323	if (ntohs(proto) >= 1536) {
	324	skb->protocol = proto;
	325	return;
	326	}
	327
	328	rawp = skb->data;
	329	if ((unsigned short ) rawp == 0xFFFF)
	330	/*
	331	* This is a magic hack to spot IPX packets. Older Novell
	332	* breaks the protocol design and runs IPX over 802.3 without
	333	* an 802.2 LLC layer. We look for FFFF which isn't a used
	334	* 802.2 SSAP/DSAP. This won't work for fault tolerant netware
	335	* but does for the rest.
	336	*/
	337	skb->protocol = htons(ETH_P_802_3);
	338	else
	339	/*
	340	* Real 802.2 LLC
	341	*/
	342	skb->protocol = htons(ETH_P_802_2);
	343	}
1da177e4 LT	344	#endif /* __KERNEL__ */
	345
	346	/* VLAN IOCTLs are found in sockios.h */
	347
	348	/* Passed in vlan_ioctl_args structure to determine behaviour. */
	349	enum vlan_ioctl_cmds {
	350	ADD_VLAN_CMD,
	351	DEL_VLAN_CMD,
	352	SET_VLAN_INGRESS_PRIORITY_CMD,
	353	SET_VLAN_EGRESS_PRIORITY_CMD,
	354	GET_VLAN_INGRESS_PRIORITY_CMD,
	355	GET_VLAN_EGRESS_PRIORITY_CMD,
	356	SET_VLAN_NAME_TYPE_CMD,
	357	SET_VLAN_FLAG_CMD,
	358	GET_VLAN_REALDEV_NAME_CMD, /* If this works, you know it's a VLAN device, btw */
	359	GET_VLAN_VID_CMD /* Get the VID of this VLAN (specified by name) */
	360	};
	361
a4bf3af4 PM	362	enum vlan_flags {
a4bf3af4 PM	363	VLAN_FLAG_REORDER_HDR = 0x1,
70c03b49	364	VLAN_FLAG_GVRP = 0x2,
5e756593	365	VLAN_FLAG_LOOSE_BINDING = 0x4,
a4bf3af4 PM	366	};
a4bf3af4 PM	367
1da177e4 LT	368	enum vlan_name_types {
	369	VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */
	370	VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */
	371	VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */
	372	VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */
	373	VLAN_NAME_TYPE_HIGHEST
	374	};
	375
	376	struct vlan_ioctl_args {
	377	int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */
	378	char device1[24];
	379
	380	union {
	381	char device2[24];
	382	int VID;
	383	unsigned int skb_priority;
	384	unsigned int name_type;
	385	unsigned int bind_type;
7da82c06	386	unsigned int flag; /* Matches vlan_dev_priv flags */
1da177e4 LT	387	} u;
	388
	389	short vlan_qos;
	390	};
	391
	392	#endif /* !(_LINUX_IF_VLAN_H_) */