[linux-2.6-block.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);
extern int vlan_hwaccel_do_receive(struct sk_buff *skb);

#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;
}

static inline int vlan_hwaccel_do_receive(struct sk_buff *skb)
{
	return 0;
}
#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);
9b22ea56 PM	117	extern int vlan_hwaccel_do_receive(struct sk_buff *skb);
9b22ea56 PM	118
7750f403	119	#else
22d1ba74 PM	120	static inline struct net_device vlan_dev_real_dev(const struct net_device dev)
	121	{
	122	BUG();
	123	return NULL;
	124	}
	125
	126	static inline u16 vlan_dev_vlan_id(const struct net_device *dev)
	127	{
	128	BUG();
	129	return 0;
	130	}
	131
7750f403	132	static inline int __vlan_hwaccel_rx(struct sk_buff skb, struct vlan_group grp,
9bb8582e	133	u16 vlan_tci, int polling)
1da177e4	134	{
7750f403 PM	135	BUG();
7750f403 PM	136	return NET_XMIT_SUCCESS;
1da177e4	137	}
9b22ea56 PM	138
	139	static inline int vlan_hwaccel_do_receive(struct sk_buff *skb)
	140	{
	141	return 0;
	142	}
7750f403	143	#endif
1da177e4	144
9bb8582e PM	145	/**
	146	* vlan_hwaccel_rx - netif_rx wrapper for VLAN RX acceleration
	147	* @skb: buffer
	148	* @grp: vlan group
	149	* @vlan_tci: VLAN TCI as received from the card
	150	*/
1da177e4 LT	151	static inline int vlan_hwaccel_rx(struct sk_buff *skb,
1da177e4 LT	152	struct vlan_group *grp,
9bb8582e	153	u16 vlan_tci)
1da177e4	154	{
9bb8582e	155	return __vlan_hwaccel_rx(skb, grp, vlan_tci, 0);
1da177e4 LT	156	}
1da177e4 LT	157
9bb8582e PM	158	/**
	159	* vlan_hwaccel_receive_skb - netif_receive_skb wrapper for VLAN RX acceleration
	160	* @skb: buffer
	161	* @grp: vlan group
	162	* @vlan_tci: VLAN TCI as received from the card
	163	*/
1da177e4 LT	164	static inline int vlan_hwaccel_receive_skb(struct sk_buff *skb,
1da177e4 LT	165	struct vlan_group *grp,
9bb8582e	166	u16 vlan_tci)
1da177e4	167	{
9bb8582e	168	return __vlan_hwaccel_rx(skb, grp, vlan_tci, 1);
1da177e4 LT	169	}
	170
	171	/**
	172	* __vlan_put_tag - regular VLAN tag inserting
	173	* @skb: skbuff to tag
9bb8582e	174	* @vlan_tci: VLAN TCI to insert
1da177e4 LT	175	*
	176	* Inserts the VLAN tag into @skb as part of the payload
	177	* Returns a VLAN tagged skb. If a new skb is created, @skb is freed.
9bb8582e	178	*
1da177e4 LT	179	* Following the skb_unshare() example, in case of error, the calling function
	180	* doesn't have to worry about freeing the original skb.
	181	*/
9bb8582e	182	static inline struct sk_buff __vlan_put_tag(struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	183	{
	184	struct vlan_ethhdr *veth;
	185
11a100f8 PM	186	if (skb_cow_head(skb, VLAN_HLEN) < 0) {
	187	kfree_skb(skb);
	188	return NULL;
1da177e4	189	}
1da177e4 LT	190	veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN);
	191
	192	/* Move the mac addresses to the beginning of the new header. */
	193	memmove(skb->data, skb->data + VLAN_HLEN, 2 * VLAN_ETH_ALEN);
	194
	195	/* first, the ethernet type */
57d3ae84	196	veth->h_vlan_proto = htons(ETH_P_8021Q);
1da177e4	197
9bb8582e PM	198	/* now, the TCI */
9bb8582e PM	199	veth->h_vlan_TCI = htons(vlan_tci);
1da177e4	200
57d3ae84	201	skb->protocol = htons(ETH_P_8021Q);
1da177e4 LT	202
	203	return skb;
	204	}
	205
	206	/**
	207	* __vlan_hwaccel_put_tag - hardware accelerated VLAN inserting
	208	* @skb: skbuff to tag
9bb8582e	209	* @vlan_tci: VLAN TCI to insert
1da177e4	210	*
6aa895b0	211	* Puts the VLAN TCI in @skb->vlan_tci and lets the device do the rest
1da177e4	212	*/
9bb8582e PM	213	static inline struct sk_buff __vlan_hwaccel_put_tag(struct sk_buff skb,
9bb8582e PM	214	u16 vlan_tci)
1da177e4	215	{
6aa895b0	216	skb->vlan_tci = vlan_tci;
1da177e4 LT	217	return skb;
	218	}
	219
	220	#define HAVE_VLAN_PUT_TAG
	221
	222	/**
	223	* vlan_put_tag - inserts VLAN tag according to device features
	224	* @skb: skbuff to tag
9bb8582e	225	* @vlan_tci: VLAN TCI to insert
1da177e4 LT	226	*
	227	* Assumes skb->dev is the target that will xmit this frame.
	228	* Returns a VLAN tagged skb.
	229	*/
9bb8582e	230	static inline struct sk_buff vlan_put_tag(struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	231	{
1da177e4 LT	232	if (skb->dev->features & NETIF_F_HW_VLAN_TX) {
9bb8582e	233	return __vlan_hwaccel_put_tag(skb, vlan_tci);
1da177e4	234	} else {
9bb8582e	235	return __vlan_put_tag(skb, vlan_tci);
1da177e4 LT	236	}
	237	}
	238
	239	/**
	240	* __vlan_get_tag - get the VLAN ID that is part of the payload
	241	* @skb: skbuff to query
9bb8582e PM	242	* @vlan_tci: buffer to store vlaue
9bb8582e PM	243	*
1da177e4 LT	244	* Returns error if the skb is not of VLAN type
1da177e4 LT	245	*/
9bb8582e	246	static inline int __vlan_get_tag(const struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	247	{
	248	struct vlan_ethhdr veth = (struct vlan_ethhdr )skb->data;
	249
57d3ae84	250	if (veth->h_vlan_proto != htons(ETH_P_8021Q)) {
1da177e4 LT	251	return -EINVAL;
	252	}
	253
9bb8582e	254	*vlan_tci = ntohs(veth->h_vlan_TCI);
1da177e4 LT	255	return 0;
	256	}
	257
	258	/**
	259	* __vlan_hwaccel_get_tag - get the VLAN ID that is in @skb->cb[]
	260	* @skb: skbuff to query
9bb8582e PM	261	* @vlan_tci: buffer to store vlaue
9bb8582e PM	262	*
6aa895b0	263	* Returns error if @skb->vlan_tci is not set correctly
1da177e4	264	*/
18149935	265	static inline int __vlan_hwaccel_get_tag(const struct sk_buff *skb,
9bb8582e	266	u16 *vlan_tci)
1da177e4	267	{
6aa895b0 PM	268	if (vlan_tx_tag_present(skb)) {
6aa895b0 PM	269	*vlan_tci = skb->vlan_tci;
1da177e4 LT	270	return 0;
1da177e4 LT	271	} else {
9bb8582e	272	*vlan_tci = 0;
1da177e4 LT	273	return -EINVAL;
	274	}
	275	}
	276
	277	#define HAVE_VLAN_GET_TAG
	278
	279	/**
	280	* vlan_get_tag - get the VLAN ID from the skb
	281	* @skb: skbuff to query
9bb8582e PM	282	* @vlan_tci: buffer to store vlaue
9bb8582e PM	283	*
1da177e4 LT	284	* Returns error if the skb is not VLAN tagged
1da177e4 LT	285	*/
9bb8582e	286	static inline int vlan_get_tag(const struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	287	{
1da177e4 LT	288	if (skb->dev->features & NETIF_F_HW_VLAN_TX) {
9bb8582e	289	return __vlan_hwaccel_get_tag(skb, vlan_tci);
1da177e4	290	} else {
9bb8582e	291	return __vlan_get_tag(skb, vlan_tci);
1da177e4 LT	292	}
	293	}
	294
	295	#endif /* __KERNEL__ */
	296
	297	/* VLAN IOCTLs are found in sockios.h */
	298
	299	/* Passed in vlan_ioctl_args structure to determine behaviour. */
	300	enum vlan_ioctl_cmds {
	301	ADD_VLAN_CMD,
	302	DEL_VLAN_CMD,
	303	SET_VLAN_INGRESS_PRIORITY_CMD,
	304	SET_VLAN_EGRESS_PRIORITY_CMD,
	305	GET_VLAN_INGRESS_PRIORITY_CMD,
	306	GET_VLAN_EGRESS_PRIORITY_CMD,
	307	SET_VLAN_NAME_TYPE_CMD,
	308	SET_VLAN_FLAG_CMD,
	309	GET_VLAN_REALDEV_NAME_CMD, /* If this works, you know it's a VLAN device, btw */
	310	GET_VLAN_VID_CMD /* Get the VID of this VLAN (specified by name) */
	311	};
	312
a4bf3af4 PM	313	enum vlan_flags {
a4bf3af4 PM	314	VLAN_FLAG_REORDER_HDR = 0x1,
70c03b49	315	VLAN_FLAG_GVRP = 0x2,
a4bf3af4 PM	316	};
a4bf3af4 PM	317
1da177e4 LT	318	enum vlan_name_types {
	319	VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */
	320	VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */
	321	VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */
	322	VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */
	323	VLAN_NAME_TYPE_HIGHEST
	324	};
	325
	326	struct vlan_ioctl_args {
	327	int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */
	328	char device1[24];
	329
	330	union {
	331	char device2[24];
	332	int VID;
	333	unsigned int skb_priority;
	334	unsigned int name_type;
	335	unsigned int bind_type;
	336	unsigned int flag; /* Matches vlan_dev_info flags */
	337	} u;
	338
	339	short vlan_qos;
	340	};
	341
	342	#endif /* !(_LINUX_IF_VLAN_H_) */