[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);
extern int vlan_hwaccel_do_receive(struct sk_buff *skb);
extern int vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
			    unsigned int vlan_tci, struct sk_buff *skb);
extern int vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
			  unsigned int vlan_tci,
			  struct napi_gro_fraginfo *info);

#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;
}

static inline int vlan_gro_receive(struct napi_struct *napi,
				   struct vlan_group *grp,
				   unsigned int vlan_tci, struct sk_buff *skb)
{
	return NET_RX_DROP;
}

static inline int vlan_gro_frags(struct napi_struct *napi,
				 struct vlan_group *grp, unsigned int vlan_tci,
				 struct napi_gro_fraginfo *info)
{
	return NET_RX_DROP;
}
#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);
	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);

	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	117	extern int vlan_hwaccel_do_receive(struct sk_buff *skb);
e1c096e2 HX	118	extern int vlan_gro_receive(struct napi_struct napi, struct vlan_group grp,
	119	unsigned int vlan_tci, struct sk_buff *skb);
	120	extern int vlan_gro_frags(struct napi_struct napi, struct vlan_group grp,
	121	unsigned int vlan_tci,
	122	struct napi_gro_fraginfo *info);
9b22ea56	123
7750f403	124	#else
22d1ba74 PM	125	static inline struct net_device vlan_dev_real_dev(const struct net_device dev)
	126	{
	127	BUG();
	128	return NULL;
	129	}
	130
	131	static inline u16 vlan_dev_vlan_id(const struct net_device *dev)
	132	{
	133	BUG();
	134	return 0;
	135	}
	136
7750f403	137	static inline int __vlan_hwaccel_rx(struct sk_buff skb, struct vlan_group grp,
9bb8582e	138	u16 vlan_tci, int polling)
1da177e4	139	{
7750f403 PM	140	BUG();
7750f403 PM	141	return NET_XMIT_SUCCESS;
1da177e4	142	}
9b22ea56 PM	143
	144	static inline int vlan_hwaccel_do_receive(struct sk_buff *skb)
	145	{
	146	return 0;
	147	}
e1c096e2 HX	148
	149	static inline int vlan_gro_receive(struct napi_struct *napi,
	150	struct vlan_group *grp,
	151	unsigned int vlan_tci, struct sk_buff *skb)
	152	{
	153	return NET_RX_DROP;
	154	}
	155
	156	static inline int vlan_gro_frags(struct napi_struct *napi,
	157	struct vlan_group *grp, unsigned int vlan_tci,
	158	struct napi_gro_fraginfo *info)
	159	{
	160	return NET_RX_DROP;
	161	}
7750f403	162	#endif
1da177e4	163
9bb8582e PM	164	/**
	165	* vlan_hwaccel_rx - netif_rx wrapper for VLAN RX acceleration
	166	* @skb: buffer
	167	* @grp: vlan group
	168	* @vlan_tci: VLAN TCI as received from the card
	169	*/
1da177e4 LT	170	static inline int vlan_hwaccel_rx(struct sk_buff *skb,
1da177e4 LT	171	struct vlan_group *grp,
9bb8582e	172	u16 vlan_tci)
1da177e4	173	{
9bb8582e	174	return __vlan_hwaccel_rx(skb, grp, vlan_tci, 0);
1da177e4 LT	175	}
1da177e4 LT	176
9bb8582e PM	177	/**
	178	* vlan_hwaccel_receive_skb - netif_receive_skb wrapper for VLAN RX acceleration
	179	* @skb: buffer
	180	* @grp: vlan group
	181	* @vlan_tci: VLAN TCI as received from the card
	182	*/
1da177e4 LT	183	static inline int vlan_hwaccel_receive_skb(struct sk_buff *skb,
1da177e4 LT	184	struct vlan_group *grp,
9bb8582e	185	u16 vlan_tci)
1da177e4	186	{
9bb8582e	187	return __vlan_hwaccel_rx(skb, grp, vlan_tci, 1);
1da177e4 LT	188	}
	189
	190	/**
	191	* __vlan_put_tag - regular VLAN tag inserting
	192	* @skb: skbuff to tag
9bb8582e	193	* @vlan_tci: VLAN TCI to insert
1da177e4 LT	194	*
	195	* Inserts the VLAN tag into @skb as part of the payload
	196	* Returns a VLAN tagged skb. If a new skb is created, @skb is freed.
9bb8582e	197	*
1da177e4 LT	198	* Following the skb_unshare() example, in case of error, the calling function
	199	* doesn't have to worry about freeing the original skb.
	200	*/
9bb8582e	201	static inline struct sk_buff __vlan_put_tag(struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	202	{
	203	struct vlan_ethhdr *veth;
	204
11a100f8 PM	205	if (skb_cow_head(skb, VLAN_HLEN) < 0) {
	206	kfree_skb(skb);
	207	return NULL;
1da177e4	208	}
1da177e4 LT	209	veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN);
	210
	211	/* Move the mac addresses to the beginning of the new header. */
	212	memmove(skb->data, skb->data + VLAN_HLEN, 2 * VLAN_ETH_ALEN);
e4dd6188	213	skb->mac_header -= VLAN_HLEN;
1da177e4 LT	214
1da177e4 LT	215	/* first, the ethernet type */
57d3ae84	216	veth->h_vlan_proto = htons(ETH_P_8021Q);
1da177e4	217
9bb8582e PM	218	/* now, the TCI */
9bb8582e PM	219	veth->h_vlan_TCI = htons(vlan_tci);
1da177e4	220
57d3ae84	221	skb->protocol = htons(ETH_P_8021Q);
1da177e4 LT	222
	223	return skb;
	224	}
	225
	226	/**
	227	* __vlan_hwaccel_put_tag - hardware accelerated VLAN inserting
	228	* @skb: skbuff to tag
9bb8582e	229	* @vlan_tci: VLAN TCI to insert
1da177e4	230	*
6aa895b0	231	* Puts the VLAN TCI in @skb->vlan_tci and lets the device do the rest
1da177e4	232	*/
9bb8582e PM	233	static inline struct sk_buff __vlan_hwaccel_put_tag(struct sk_buff skb,
9bb8582e PM	234	u16 vlan_tci)
1da177e4	235	{
6aa895b0	236	skb->vlan_tci = vlan_tci;
1da177e4 LT	237	return skb;
	238	}
	239
	240	#define HAVE_VLAN_PUT_TAG
	241
	242	/**
	243	* vlan_put_tag - inserts VLAN tag according to device features
	244	* @skb: skbuff to tag
9bb8582e	245	* @vlan_tci: VLAN TCI to insert
1da177e4 LT	246	*
	247	* Assumes skb->dev is the target that will xmit this frame.
	248	* Returns a VLAN tagged skb.
	249	*/
9bb8582e	250	static inline struct sk_buff vlan_put_tag(struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	251	{
1da177e4 LT	252	if (skb->dev->features & NETIF_F_HW_VLAN_TX) {
9bb8582e	253	return __vlan_hwaccel_put_tag(skb, vlan_tci);
1da177e4	254	} else {
9bb8582e	255	return __vlan_put_tag(skb, vlan_tci);
1da177e4 LT	256	}
	257	}
	258
	259	/**
	260	* __vlan_get_tag - get the VLAN ID that is part of the payload
	261	* @skb: skbuff to query
9bb8582e PM	262	* @vlan_tci: buffer to store vlaue
9bb8582e PM	263	*
1da177e4 LT	264	* Returns error if the skb is not of VLAN type
1da177e4 LT	265	*/
9bb8582e	266	static inline int __vlan_get_tag(const struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	267	{
	268	struct vlan_ethhdr veth = (struct vlan_ethhdr )skb->data;
	269
57d3ae84	270	if (veth->h_vlan_proto != htons(ETH_P_8021Q)) {
1da177e4 LT	271	return -EINVAL;
	272	}
	273
9bb8582e	274	*vlan_tci = ntohs(veth->h_vlan_TCI);
1da177e4 LT	275	return 0;
	276	}
	277
	278	/**
	279	* __vlan_hwaccel_get_tag - get the VLAN ID that is in @skb->cb[]
	280	* @skb: skbuff to query
9bb8582e PM	281	* @vlan_tci: buffer to store vlaue
9bb8582e PM	282	*
6aa895b0	283	* Returns error if @skb->vlan_tci is not set correctly
1da177e4	284	*/
18149935	285	static inline int __vlan_hwaccel_get_tag(const struct sk_buff *skb,
9bb8582e	286	u16 *vlan_tci)
1da177e4	287	{
6aa895b0 PM	288	if (vlan_tx_tag_present(skb)) {
6aa895b0 PM	289	*vlan_tci = skb->vlan_tci;
1da177e4 LT	290	return 0;
1da177e4 LT	291	} else {
9bb8582e	292	*vlan_tci = 0;
1da177e4 LT	293	return -EINVAL;
	294	}
	295	}
	296
	297	#define HAVE_VLAN_GET_TAG
	298
	299	/**
	300	* vlan_get_tag - get the VLAN ID from the skb
	301	* @skb: skbuff to query
9bb8582e PM	302	* @vlan_tci: buffer to store vlaue
9bb8582e PM	303	*
1da177e4 LT	304	* Returns error if the skb is not VLAN tagged
1da177e4 LT	305	*/
9bb8582e	306	static inline int vlan_get_tag(const struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	307	{
1da177e4 LT	308	if (skb->dev->features & NETIF_F_HW_VLAN_TX) {
9bb8582e	309	return __vlan_hwaccel_get_tag(skb, vlan_tci);
1da177e4	310	} else {
9bb8582e	311	return __vlan_get_tag(skb, vlan_tci);
1da177e4 LT	312	}
	313	}
	314
	315	#endif /* __KERNEL__ */
	316
	317	/* VLAN IOCTLs are found in sockios.h */
	318
	319	/* Passed in vlan_ioctl_args structure to determine behaviour. */
	320	enum vlan_ioctl_cmds {
	321	ADD_VLAN_CMD,
	322	DEL_VLAN_CMD,
	323	SET_VLAN_INGRESS_PRIORITY_CMD,
	324	SET_VLAN_EGRESS_PRIORITY_CMD,
	325	GET_VLAN_INGRESS_PRIORITY_CMD,
	326	GET_VLAN_EGRESS_PRIORITY_CMD,
	327	SET_VLAN_NAME_TYPE_CMD,
	328	SET_VLAN_FLAG_CMD,
	329	GET_VLAN_REALDEV_NAME_CMD, /* If this works, you know it's a VLAN device, btw */
	330	GET_VLAN_VID_CMD /* Get the VID of this VLAN (specified by name) */
	331	};
	332
a4bf3af4 PM	333	enum vlan_flags {
a4bf3af4 PM	334	VLAN_FLAG_REORDER_HDR = 0x1,
70c03b49	335	VLAN_FLAG_GVRP = 0x2,
a4bf3af4 PM	336	};
a4bf3af4 PM	337
1da177e4 LT	338	enum vlan_name_types {
	339	VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */
	340	VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */
	341	VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */
	342	VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */
	343	VLAN_NAME_TYPE_HIGHEST
	344	};
	345
	346	struct vlan_ioctl_args {
	347	int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */
	348	char device1[24];
	349
	350	union {
	351	char device2[24];
	352	int VID;
	353	unsigned int skb_priority;
	354	unsigned int name_type;
	355	unsigned int bind_type;
	356	unsigned int flag; /* Matches vlan_dev_info flags */
	357	} u;
	358
	359	short vlan_qos;
	360	};
	361
	362	#endif /* !(_LINUX_IF_VLAN_H_) */