[deliverable/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>

#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_VID_MASK	0xfff

/* 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_LEN          4096
#define VLAN_GROUP_ARRAY_SPLIT_PARTS  8
#define VLAN_GROUP_ARRAY_PART_LEN     (VLAN_GROUP_ARRAY_LEN/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 struct net_device *vlan_group_get_device(struct vlan_group *vg,
						       u16 vlan_id)
{
	struct net_device **array;
	array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
	return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
}

static inline void vlan_group_set_device(struct vlan_group *vg,
					 u16 vlan_id,
					 struct net_device *dev)
{
	struct net_device **array;
	if (!vg)
		return;
	array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
	array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
}

#define vlan_tx_tag_present(__skb)	((__skb)->vlan_tci)
#define vlan_tx_tag_get(__skb)		((__skb)->vlan_tci)

#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
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 int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
			     u16 vlan_tci, int polling);
#else
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 int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
				    u16 vlan_tci, int polling)
{
	BUG();
	return NET_XMIT_SUCCESS;
}
#endif

/**
 * vlan_hwaccel_rx - netif_rx wrapper for VLAN RX acceleration
 * @skb: buffer
 * @grp: vlan group
 * @vlan_tci: VLAN TCI as received from the card
 */
static inline int vlan_hwaccel_rx(struct sk_buff *skb,
				  struct vlan_group *grp,
				  u16 vlan_tci)
{
	return __vlan_hwaccel_rx(skb, grp, vlan_tci, 0);
}

/**
 * vlan_hwaccel_receive_skb - netif_receive_skb wrapper for VLAN RX acceleration
 * @skb: buffer
 * @grp: vlan group
 * @vlan_tci: VLAN TCI as received from the card
 */
static inline int vlan_hwaccel_receive_skb(struct sk_buff *skb,
					   struct vlan_group *grp,
					   u16 vlan_tci)
{
	return __vlan_hwaccel_rx(skb, grp, vlan_tci, 1);
}

/**
 * __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)
{
	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);

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

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

	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_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 = skb->vlan_tci;
		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);
	}
}

#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,
};

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>
1da177e4 LT	19
	20	#define VLAN_HLEN 4 /* The additional bytes (on top of the Ethernet header)
	21	* that VLAN requires.
	22	*/
	23	#define VLAN_ETH_ALEN 6 /* Octets in one ethernet addr */
	24	#define VLAN_ETH_HLEN 18 /* Total octets in header. */
	25	#define VLAN_ETH_ZLEN 64 /* Min. octets in frame sans FCS */
	26
	27	/*
	28	* According to 802.3ac, the packet can be 4 bytes longer. --Klika Jan
	29	*/
	30	#define VLAN_ETH_DATA_LEN 1500 /* Max. octets in payload */
	31	#define VLAN_ETH_FRAME_LEN 1518 /* Max. octets in frame sans FCS */
	32
740c15d0 PM	33	/*
	34	* struct vlan_hdr - vlan header
	35	* @h_vlan_TCI: priority and VLAN ID
	36	* @h_vlan_encapsulated_proto: packet type ID or len
	37	*/
	38	struct vlan_hdr {
	39	__be16 h_vlan_TCI;
	40	__be16 h_vlan_encapsulated_proto;
	41	};
	42
	43	/**
	44	* struct vlan_ethhdr - vlan ethernet header (ethhdr + vlan_hdr)
	45	* @h_dest: destination ethernet address
	46	* @h_source: source ethernet address
	47	* @h_vlan_proto: ethernet protocol (always 0x8100)
	48	* @h_vlan_TCI: priority and VLAN ID
	49	* @h_vlan_encapsulated_proto: packet type ID or len
	50	*/
1da177e4	51	struct vlan_ethhdr {
740c15d0 PM	52	unsigned char h_dest[ETH_ALEN];
	53	unsigned char h_source[ETH_ALEN];
	54	__be16 h_vlan_proto;
	55	__be16 h_vlan_TCI;
	56	__be16 h_vlan_encapsulated_proto;
1da177e4 LT	57	};
	58
	59	#include <linux/skbuff.h>
	60
	61	static inline struct vlan_ethhdr vlan_eth_hdr(const struct sk_buff skb)
	62	{
98e399f8	63	return (struct vlan_ethhdr *)skb_mac_header(skb);
1da177e4 LT	64	}
1da177e4 LT	65
1da177e4 LT	66	#define VLAN_VID_MASK 0xfff
	67
	68	/* found in socket.c */
881d966b	69	extern void vlan_ioctl_set(int (hook)(struct net , void __user *));
1da177e4	70
1da177e4 LT	71	/* if this changes, algorithm will have to be reworked because this
	72	* depends on completely exhausting the VLAN identifier space. Thus
	73	* it gives constant time look-up, but in many cases it wastes memory.
	74	*/
5c15bdec DA	75	#define VLAN_GROUP_ARRAY_LEN 4096
	76	#define VLAN_GROUP_ARRAY_SPLIT_PARTS 8
	77	#define VLAN_GROUP_ARRAY_PART_LEN (VLAN_GROUP_ARRAY_LEN/VLAN_GROUP_ARRAY_SPLIT_PARTS)
1da177e4 LT	78
1da177e4 LT	79	struct vlan_group {
a9fde260 PE	80	struct net_device real_dev; / The ethernet(like) device
	81	* the vlan is attached to.
	82	*/
af301517	83	unsigned int nr_vlans;
1da177e4	84	struct hlist_node hlist; /* linked list */
5c15bdec	85	struct net_device **vlan_devices_arrays[VLAN_GROUP_ARRAY_SPLIT_PARTS];
1da177e4 LT	86	struct rcu_head rcu;
	87	};
	88
f0b5a0dc	89	static inline struct net_device vlan_group_get_device(struct vlan_group vg,
9bb8582e	90	u16 vlan_id)
5c15bdec DA	91	{
	92	struct net_device **array;
	93	array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
67727184	94	return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
5c15bdec DA	95	}
5c15bdec DA	96
f0b5a0dc	97	static inline void vlan_group_set_device(struct vlan_group *vg,
9bb8582e	98	u16 vlan_id,
5c15bdec DA	99	struct net_device *dev)
	100	{
	101	struct net_device **array;
	102	if (!vg)
	103	return;
	104	array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
	105	array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
	106	}
	107
6aa895b0 PM	108	#define vlan_tx_tag_present(__skb) ((__skb)->vlan_tci)
6aa895b0 PM	109	#define vlan_tx_tag_get(__skb) ((__skb)->vlan_tci)
1da177e4	110
7750f403	111	#if defined(CONFIG_VLAN_8021Q) \|\| defined(CONFIG_VLAN_8021Q_MODULE)
22d1ba74 PM	112	extern struct net_device vlan_dev_real_dev(const struct net_device dev);
	113	extern u16 vlan_dev_vlan_id(const struct net_device *dev);
	114
7750f403	115	extern int __vlan_hwaccel_rx(struct sk_buff skb, struct vlan_group grp,
9bb8582e	116	u16 vlan_tci, int polling);
7750f403	117	#else
22d1ba74 PM	118	static inline struct net_device vlan_dev_real_dev(const struct net_device dev)
	119	{
	120	BUG();
	121	return NULL;
	122	}
	123
	124	static inline u16 vlan_dev_vlan_id(const struct net_device *dev)
	125	{
	126	BUG();
	127	return 0;
	128	}
	129
7750f403	130	static inline int __vlan_hwaccel_rx(struct sk_buff skb, struct vlan_group grp,
9bb8582e	131	u16 vlan_tci, int polling)
1da177e4	132	{
7750f403 PM	133	BUG();
7750f403 PM	134	return NET_XMIT_SUCCESS;
1da177e4	135	}
7750f403	136	#endif
1da177e4	137
9bb8582e PM	138	/**
	139	* vlan_hwaccel_rx - netif_rx wrapper for VLAN RX acceleration
	140	* @skb: buffer
	141	* @grp: vlan group
	142	* @vlan_tci: VLAN TCI as received from the card
	143	*/
1da177e4 LT	144	static inline int vlan_hwaccel_rx(struct sk_buff *skb,
1da177e4 LT	145	struct vlan_group *grp,
9bb8582e	146	u16 vlan_tci)
1da177e4	147	{
9bb8582e	148	return __vlan_hwaccel_rx(skb, grp, vlan_tci, 0);
1da177e4 LT	149	}
1da177e4 LT	150
9bb8582e PM	151	/**
	152	* vlan_hwaccel_receive_skb - netif_receive_skb wrapper for VLAN RX acceleration
	153	* @skb: buffer
	154	* @grp: vlan group
	155	* @vlan_tci: VLAN TCI as received from the card
	156	*/
1da177e4 LT	157	static inline int vlan_hwaccel_receive_skb(struct sk_buff *skb,
1da177e4 LT	158	struct vlan_group *grp,
9bb8582e	159	u16 vlan_tci)
1da177e4	160	{
9bb8582e	161	return __vlan_hwaccel_rx(skb, grp, vlan_tci, 1);
1da177e4 LT	162	}
	163
	164	/**
	165	* __vlan_put_tag - regular VLAN tag inserting
	166	* @skb: skbuff to tag
9bb8582e	167	* @vlan_tci: VLAN TCI to insert
1da177e4 LT	168	*
	169	* Inserts the VLAN tag into @skb as part of the payload
	170	* Returns a VLAN tagged skb. If a new skb is created, @skb is freed.
9bb8582e	171	*
1da177e4 LT	172	* Following the skb_unshare() example, in case of error, the calling function
	173	* doesn't have to worry about freeing the original skb.
	174	*/
9bb8582e	175	static inline struct sk_buff __vlan_put_tag(struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	176	{
	177	struct vlan_ethhdr *veth;
	178
11a100f8 PM	179	if (skb_cow_head(skb, VLAN_HLEN) < 0) {
	180	kfree_skb(skb);
	181	return NULL;
1da177e4	182	}
1da177e4 LT	183	veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN);
	184
	185	/* Move the mac addresses to the beginning of the new header. */
	186	memmove(skb->data, skb->data + VLAN_HLEN, 2 * VLAN_ETH_ALEN);
	187
	188	/* first, the ethernet type */
57d3ae84	189	veth->h_vlan_proto = htons(ETH_P_8021Q);
1da177e4	190
9bb8582e PM	191	/* now, the TCI */
9bb8582e PM	192	veth->h_vlan_TCI = htons(vlan_tci);
1da177e4	193
57d3ae84	194	skb->protocol = htons(ETH_P_8021Q);
1da177e4 LT	195
	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	{
6aa895b0	209	skb->vlan_tci = 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 PM	261	if (vlan_tx_tag_present(skb)) {
6aa895b0 PM	262	*vlan_tci = skb->vlan_tci;
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
	288	#endif /* __KERNEL__ */
	289
	290	/* VLAN IOCTLs are found in sockios.h */
	291
	292	/* Passed in vlan_ioctl_args structure to determine behaviour. */
	293	enum vlan_ioctl_cmds {
	294	ADD_VLAN_CMD,
	295	DEL_VLAN_CMD,
	296	SET_VLAN_INGRESS_PRIORITY_CMD,
	297	SET_VLAN_EGRESS_PRIORITY_CMD,
	298	GET_VLAN_INGRESS_PRIORITY_CMD,
	299	GET_VLAN_EGRESS_PRIORITY_CMD,
	300	SET_VLAN_NAME_TYPE_CMD,
	301	SET_VLAN_FLAG_CMD,
	302	GET_VLAN_REALDEV_NAME_CMD, /* If this works, you know it's a VLAN device, btw */
	303	GET_VLAN_VID_CMD /* Get the VID of this VLAN (specified by name) */
	304	};
	305
a4bf3af4 PM	306	enum vlan_flags {
a4bf3af4 PM	307	VLAN_FLAG_REORDER_HDR = 0x1,
70c03b49	308	VLAN_FLAG_GVRP = 0x2,
a4bf3af4 PM	309	};
a4bf3af4 PM	310
1da177e4 LT	311	enum vlan_name_types {
	312	VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */
	313	VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */
	314	VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */
	315	VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */
	316	VLAN_NAME_TYPE_HIGHEST
	317	};
	318
	319	struct vlan_ioctl_args {
	320	int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */
	321	char device1[24];
	322
	323	union {
	324	char device2[24];
	325	int VID;
	326	unsigned int skb_priority;
	327	unsigned int name_type;
	328	unsigned int bind_type;
	329	unsigned int flag; /* Matches vlan_dev_info flags */
	330	} u;
	331
	332	short vlan_qos;
	333	};
	334
	335	#endif /* !(_LINUX_IF_VLAN_H_) */