[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_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 */

/* 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;
	int			killall;
	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 & 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_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 gro_result_t
vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
		 unsigned int vlan_tci, struct sk_buff *skb);
extern gro_result_t
vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
	       unsigned int vlan_tci);

#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 gro_result_t
vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
		 unsigned int vlan_tci, struct sk_buff *skb)
{
	return GRO_DROP;
}

static inline gro_result_t
vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
	       unsigned int vlan_tci)
{
	return GRO_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_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);
	}
}

#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>
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
05423b24 ED	66	#define VLAN_PRIO_MASK 0xe000 /* Priority Code Point */
	67	#define VLAN_PRIO_SHIFT 13
	68	#define VLAN_CFI_MASK 0x1000 /* Canonical Format Indicator */
	69	#define VLAN_TAG_PRESENT VLAN_CFI_MASK
	70	#define VLAN_VID_MASK 0x0fff /* VLAN Identifier */
1da177e4 LT	71
1da177e4 LT	72	/* found in socket.c */
881d966b	73	extern void vlan_ioctl_set(int (hook)(struct net , void __user *));
1da177e4	74
1da177e4 LT	75	/* if this changes, algorithm will have to be reworked because this
	76	* depends on completely exhausting the VLAN identifier space. Thus
	77	* it gives constant time look-up, but in many cases it wastes memory.
	78	*/
5c15bdec DA	79	#define VLAN_GROUP_ARRAY_LEN 4096
	80	#define VLAN_GROUP_ARRAY_SPLIT_PARTS 8
	81	#define VLAN_GROUP_ARRAY_PART_LEN (VLAN_GROUP_ARRAY_LEN/VLAN_GROUP_ARRAY_SPLIT_PARTS)
1da177e4 LT	82
1da177e4 LT	83	struct vlan_group {
a9fde260 PE	84	struct net_device real_dev; / The ethernet(like) device
	85	* the vlan is attached to.
	86	*/
af301517	87	unsigned int nr_vlans;
63c8099d	88	int killall;
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
f0b5a0dc	94	static inline struct net_device vlan_group_get_device(struct vlan_group vg,
9bb8582e	95	u16 vlan_id)
5c15bdec DA	96	{
	97	struct net_device **array;
	98	array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
67727184	99	return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
5c15bdec DA	100	}
5c15bdec DA	101
f0b5a0dc	102	static inline void vlan_group_set_device(struct vlan_group *vg,
9bb8582e	103	u16 vlan_id,
5c15bdec DA	104	struct net_device *dev)
	105	{
	106	struct net_device **array;
	107	if (!vg)
	108	return;
	109	array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
	110	array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
	111	}
	112
05423b24 ED	113	#define vlan_tx_tag_present(__skb) ((__skb)->vlan_tci & VLAN_TAG_PRESENT)
05423b24 ED	114	#define vlan_tx_tag_get(__skb) ((__skb)->vlan_tci & ~VLAN_TAG_PRESENT)
1da177e4	115
7750f403	116	#if defined(CONFIG_VLAN_8021Q) \|\| defined(CONFIG_VLAN_8021Q_MODULE)
22d1ba74 PM	117	extern struct net_device vlan_dev_real_dev(const struct net_device dev);
	118	extern u16 vlan_dev_vlan_id(const struct net_device *dev);
	119
7750f403	120	extern int __vlan_hwaccel_rx(struct sk_buff skb, struct vlan_group grp,
9bb8582e	121	u16 vlan_tci, int polling);
9b22ea56	122	extern int vlan_hwaccel_do_receive(struct sk_buff *skb);
c7c4b3b6 BH	123	extern gro_result_t
	124	vlan_gro_receive(struct napi_struct napi, struct vlan_group grp,
	125	unsigned int vlan_tci, struct sk_buff *skb);
	126	extern gro_result_t
	127	vlan_gro_frags(struct napi_struct napi, struct vlan_group grp,
	128	unsigned int vlan_tci);
9b22ea56	129
7750f403	130	#else
22d1ba74 PM	131	static inline struct net_device vlan_dev_real_dev(const struct net_device dev)
	132	{
	133	BUG();
	134	return NULL;
	135	}
	136
	137	static inline u16 vlan_dev_vlan_id(const struct net_device *dev)
	138	{
	139	BUG();
	140	return 0;
	141	}
	142
7750f403	143	static inline int __vlan_hwaccel_rx(struct sk_buff skb, struct vlan_group grp,
9bb8582e	144	u16 vlan_tci, int polling)
1da177e4	145	{
7750f403 PM	146	BUG();
7750f403 PM	147	return NET_XMIT_SUCCESS;
1da177e4	148	}
9b22ea56 PM	149
	150	static inline int vlan_hwaccel_do_receive(struct sk_buff *skb)
	151	{
	152	return 0;
	153	}
e1c096e2	154
c7c4b3b6 BH	155	static inline gro_result_t
	156	vlan_gro_receive(struct napi_struct napi, struct vlan_group grp,
	157	unsigned int vlan_tci, struct sk_buff *skb)
e1c096e2	158	{
c7c4b3b6	159	return GRO_DROP;
e1c096e2 HX	160	}
e1c096e2 HX	161
c7c4b3b6 BH	162	static inline gro_result_t
	163	vlan_gro_frags(struct napi_struct napi, struct vlan_group grp,
	164	unsigned int vlan_tci)
e1c096e2	165	{
c7c4b3b6	166	return GRO_DROP;
e1c096e2	167	}
7750f403	168	#endif
1da177e4	169
9bb8582e PM	170	/**
	171	* vlan_hwaccel_rx - netif_rx wrapper for VLAN RX acceleration
	172	* @skb: buffer
	173	* @grp: vlan group
	174	* @vlan_tci: VLAN TCI as received from the card
	175	*/
1da177e4 LT	176	static inline int vlan_hwaccel_rx(struct sk_buff *skb,
1da177e4 LT	177	struct vlan_group *grp,
9bb8582e	178	u16 vlan_tci)
1da177e4	179	{
9bb8582e	180	return __vlan_hwaccel_rx(skb, grp, vlan_tci, 0);
1da177e4 LT	181	}
1da177e4 LT	182
9bb8582e PM	183	/**
	184	* vlan_hwaccel_receive_skb - netif_receive_skb wrapper for VLAN RX acceleration
	185	* @skb: buffer
	186	* @grp: vlan group
	187	* @vlan_tci: VLAN TCI as received from the card
	188	*/
1da177e4 LT	189	static inline int vlan_hwaccel_receive_skb(struct sk_buff *skb,
1da177e4 LT	190	struct vlan_group *grp,
9bb8582e	191	u16 vlan_tci)
1da177e4	192	{
9bb8582e	193	return __vlan_hwaccel_rx(skb, grp, vlan_tci, 1);
1da177e4 LT	194	}
	195
	196	/**
	197	* __vlan_put_tag - regular VLAN tag inserting
	198	* @skb: skbuff to tag
9bb8582e	199	* @vlan_tci: VLAN TCI to insert
1da177e4 LT	200	*
	201	* Inserts the VLAN tag into @skb as part of the payload
	202	* Returns a VLAN tagged skb. If a new skb is created, @skb is freed.
9bb8582e	203	*
1da177e4 LT	204	* Following the skb_unshare() example, in case of error, the calling function
	205	* doesn't have to worry about freeing the original skb.
	206	*/
9bb8582e	207	static inline struct sk_buff __vlan_put_tag(struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	208	{
	209	struct vlan_ethhdr *veth;
	210
11a100f8 PM	211	if (skb_cow_head(skb, VLAN_HLEN) < 0) {
	212	kfree_skb(skb);
	213	return NULL;
1da177e4	214	}
1da177e4 LT	215	veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN);
	216
	217	/* Move the mac addresses to the beginning of the new header. */
	218	memmove(skb->data, skb->data + VLAN_HLEN, 2 * VLAN_ETH_ALEN);
e4dd6188	219	skb->mac_header -= VLAN_HLEN;
1da177e4 LT	220
1da177e4 LT	221	/* first, the ethernet type */
57d3ae84	222	veth->h_vlan_proto = htons(ETH_P_8021Q);
1da177e4	223
9bb8582e PM	224	/* now, the TCI */
9bb8582e PM	225	veth->h_vlan_TCI = htons(vlan_tci);
1da177e4	226
57d3ae84	227	skb->protocol = htons(ETH_P_8021Q);
1da177e4 LT	228
	229	return skb;
	230	}
	231
	232	/**
	233	* __vlan_hwaccel_put_tag - hardware accelerated VLAN inserting
	234	* @skb: skbuff to tag
9bb8582e	235	* @vlan_tci: VLAN TCI to insert
1da177e4	236	*
6aa895b0	237	* Puts the VLAN TCI in @skb->vlan_tci and lets the device do the rest
1da177e4	238	*/
9bb8582e PM	239	static inline struct sk_buff __vlan_hwaccel_put_tag(struct sk_buff skb,
9bb8582e PM	240	u16 vlan_tci)
1da177e4	241	{
05423b24	242	skb->vlan_tci = VLAN_TAG_PRESENT \| vlan_tci;
1da177e4 LT	243	return skb;
	244	}
	245
	246	#define HAVE_VLAN_PUT_TAG
	247
	248	/**
	249	* vlan_put_tag - inserts VLAN tag according to device features
	250	* @skb: skbuff to tag
9bb8582e	251	* @vlan_tci: VLAN TCI to insert
1da177e4 LT	252	*
	253	* Assumes skb->dev is the target that will xmit this frame.
	254	* Returns a VLAN tagged skb.
	255	*/
9bb8582e	256	static inline struct sk_buff vlan_put_tag(struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	257	{
1da177e4 LT	258	if (skb->dev->features & NETIF_F_HW_VLAN_TX) {
9bb8582e	259	return __vlan_hwaccel_put_tag(skb, vlan_tci);
1da177e4	260	} else {
9bb8582e	261	return __vlan_put_tag(skb, vlan_tci);
1da177e4 LT	262	}
	263	}
	264
	265	/**
	266	* __vlan_get_tag - get the VLAN ID that is part of the payload
	267	* @skb: skbuff to query
9bb8582e PM	268	* @vlan_tci: buffer to store vlaue
9bb8582e PM	269	*
1da177e4 LT	270	* Returns error if the skb is not of VLAN type
1da177e4 LT	271	*/
9bb8582e	272	static inline int __vlan_get_tag(const struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	273	{
	274	struct vlan_ethhdr veth = (struct vlan_ethhdr )skb->data;
	275
57d3ae84	276	if (veth->h_vlan_proto != htons(ETH_P_8021Q)) {
1da177e4 LT	277	return -EINVAL;
	278	}
	279
9bb8582e	280	*vlan_tci = ntohs(veth->h_vlan_TCI);
1da177e4 LT	281	return 0;
	282	}
	283
	284	/**
	285	* __vlan_hwaccel_get_tag - get the VLAN ID that is in @skb->cb[]
	286	* @skb: skbuff to query
9bb8582e PM	287	* @vlan_tci: buffer to store vlaue
9bb8582e PM	288	*
6aa895b0	289	* Returns error if @skb->vlan_tci is not set correctly
1da177e4	290	*/
18149935	291	static inline int __vlan_hwaccel_get_tag(const struct sk_buff *skb,
9bb8582e	292	u16 *vlan_tci)
1da177e4	293	{
6aa895b0	294	if (vlan_tx_tag_present(skb)) {
05423b24	295	*vlan_tci = vlan_tx_tag_get(skb);
1da177e4 LT	296	return 0;
1da177e4 LT	297	} else {
9bb8582e	298	*vlan_tci = 0;
1da177e4 LT	299	return -EINVAL;
	300	}
	301	}
	302
	303	#define HAVE_VLAN_GET_TAG
	304
	305	/**
	306	* vlan_get_tag - get the VLAN ID from the skb
	307	* @skb: skbuff to query
9bb8582e PM	308	* @vlan_tci: buffer to store vlaue
9bb8582e PM	309	*
1da177e4 LT	310	* Returns error if the skb is not VLAN tagged
1da177e4 LT	311	*/
9bb8582e	312	static inline int vlan_get_tag(const struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	313	{
1da177e4 LT	314	if (skb->dev->features & NETIF_F_HW_VLAN_TX) {
9bb8582e	315	return __vlan_hwaccel_get_tag(skb, vlan_tci);
1da177e4	316	} else {
9bb8582e	317	return __vlan_get_tag(skb, vlan_tci);
1da177e4 LT	318	}
	319	}
	320
	321	#endif /* __KERNEL__ */
	322
	323	/* VLAN IOCTLs are found in sockios.h */
	324
	325	/* Passed in vlan_ioctl_args structure to determine behaviour. */
	326	enum vlan_ioctl_cmds {
	327	ADD_VLAN_CMD,
	328	DEL_VLAN_CMD,
	329	SET_VLAN_INGRESS_PRIORITY_CMD,
	330	SET_VLAN_EGRESS_PRIORITY_CMD,
	331	GET_VLAN_INGRESS_PRIORITY_CMD,
	332	GET_VLAN_EGRESS_PRIORITY_CMD,
	333	SET_VLAN_NAME_TYPE_CMD,
	334	SET_VLAN_FLAG_CMD,
	335	GET_VLAN_REALDEV_NAME_CMD, /* If this works, you know it's a VLAN device, btw */
	336	GET_VLAN_VID_CMD /* Get the VID of this VLAN (specified by name) */
	337	};
	338
a4bf3af4 PM	339	enum vlan_flags {
a4bf3af4 PM	340	VLAN_FLAG_REORDER_HDR = 0x1,
70c03b49	341	VLAN_FLAG_GVRP = 0x2,
5e756593	342	VLAN_FLAG_LOOSE_BINDING = 0x4,
a4bf3af4 PM	343	};
a4bf3af4 PM	344
1da177e4 LT	345	enum vlan_name_types {
	346	VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */
	347	VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */
	348	VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */
	349	VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */
	350	VLAN_NAME_TYPE_HIGHEST
	351	};
	352
	353	struct vlan_ioctl_args {
	354	int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */
	355	char device1[24];
	356
	357	union {
	358	char device2[24];
	359	int VID;
	360	unsigned int skb_priority;
	361	unsigned int name_type;
	362	unsigned int bind_type;
	363	unsigned int flag; /* Matches vlan_dev_info flags */
	364	} u;
	365
	366	short vlan_qos;
	367	};
	368
	369	#endif /* !(_LINUX_IF_VLAN_H_) */