[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>
#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 *));

/* 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_SPLIT_PARTS  8
#define VLAN_GROUP_ARRAY_PART_LEN     (VLAN_N_VID/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)
/* Must be invoked with rcu_read_lock or with RTNL. */
static inline struct net_device *vlan_find_dev(struct net_device *real_dev,
					       u16 vlan_id)
{
	struct vlan_group *grp = rcu_dereference_rtnl(real_dev->vlgrp);

	if (grp)
		return vlan_group_get_device(grp, vlan_id);

	return NULL;
}

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 bool vlan_do_receive(struct sk_buff **skb);
extern struct sk_buff *vlan_untag(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_find_dev(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 int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
				    u16 vlan_tci, int polling)
{
	BUG();
	return NET_XMIT_SUCCESS;
}

static inline bool vlan_do_receive(struct sk_buff **skb)
{
	if ((*skb)->vlan_tci & VLAN_VID_MASK)
		(*skb)->pkt_type = PACKET_OTHERHOST;
	return false;
}

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

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);
	}
}

/**
 * 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;
}
#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>
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
1da177e4 LT	77	/* if this changes, algorithm will have to be reworked because this
	78	* depends on completely exhausting the VLAN identifier space. Thus
	79	* it gives constant time look-up, but in many cases it wastes memory.
	80	*/
5c15bdec	81	#define VLAN_GROUP_ARRAY_SPLIT_PARTS 8
b738127d	82	#define VLAN_GROUP_ARRAY_PART_LEN (VLAN_N_VID/VLAN_GROUP_ARRAY_SPLIT_PARTS)
1da177e4 LT	83
1da177e4 LT	84	struct vlan_group {
a9fde260 PE	85	struct net_device real_dev; / The ethernet(like) device
	86	* the vlan is attached to.
	87	*/
af301517	88	unsigned int nr_vlans;
63c8099d	89	int killall;
1da177e4	90	struct hlist_node hlist; /* linked list */
5c15bdec	91	struct net_device **vlan_devices_arrays[VLAN_GROUP_ARRAY_SPLIT_PARTS];
1da177e4 LT	92	struct rcu_head rcu;
	93	};
	94
f0b5a0dc	95	static inline struct net_device vlan_group_get_device(struct vlan_group vg,
9bb8582e	96	u16 vlan_id)
5c15bdec DA	97	{
	98	struct net_device **array;
	99	array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
67727184	100	return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
5c15bdec DA	101	}
5c15bdec DA	102
f0b5a0dc	103	static inline void vlan_group_set_device(struct vlan_group *vg,
9bb8582e	104	u16 vlan_id,
5c15bdec DA	105	struct net_device *dev)
	106	{
	107	struct net_device **array;
	108	if (!vg)
	109	return;
	110	array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
	111	array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
	112	}
	113
05423b24 ED	114	#define vlan_tx_tag_present(__skb) ((__skb)->vlan_tci & VLAN_TAG_PRESENT)
05423b24 ED	115	#define vlan_tx_tag_get(__skb) ((__skb)->vlan_tci & ~VLAN_TAG_PRESENT)
1da177e4	116
7750f403	117	#if defined(CONFIG_VLAN_8021Q) \|\| defined(CONFIG_VLAN_8021Q_MODULE)
65ac6a5f JG	118	/* Must be invoked with rcu_read_lock or with RTNL. */
	119	static inline struct net_device vlan_find_dev(struct net_device real_dev,
	120	u16 vlan_id)
	121	{
	122	struct vlan_group *grp = rcu_dereference_rtnl(real_dev->vlgrp);
	123
	124	if (grp)
	125	return vlan_group_get_device(grp, vlan_id);
	126
	127	return NULL;
	128	}
	129
22d1ba74 PM	130	extern struct net_device vlan_dev_real_dev(const struct net_device dev);
	131	extern u16 vlan_dev_vlan_id(const struct net_device *dev);
	132
7750f403	133	extern int __vlan_hwaccel_rx(struct sk_buff skb, struct vlan_group grp,
9bb8582e	134	u16 vlan_tci, int polling);
bcc6d479 JP	135	extern bool vlan_do_receive(struct sk_buff **skb);
bcc6d479 JP	136	extern struct sk_buff vlan_untag(struct sk_buff skb);
c7c4b3b6 BH	137	extern gro_result_t
	138	vlan_gro_receive(struct napi_struct napi, struct vlan_group grp,
	139	unsigned int vlan_tci, struct sk_buff *skb);
	140	extern gro_result_t
	141	vlan_gro_frags(struct napi_struct napi, struct vlan_group grp,
	142	unsigned int vlan_tci);
9b22ea56	143
7750f403	144	#else
65ac6a5f JG	145	static inline struct net_device vlan_find_dev(struct net_device real_dev,
	146	u16 vlan_id)
	147	{
	148	return NULL;
	149	}
	150
22d1ba74 PM	151	static inline struct net_device vlan_dev_real_dev(const struct net_device dev)
	152	{
	153	BUG();
	154	return NULL;
	155	}
	156
	157	static inline u16 vlan_dev_vlan_id(const struct net_device *dev)
	158	{
	159	BUG();
	160	return 0;
	161	}
	162
7750f403	163	static inline int __vlan_hwaccel_rx(struct sk_buff skb, struct vlan_group grp,
9bb8582e	164	u16 vlan_tci, int polling)
1da177e4	165	{
7750f403 PM	166	BUG();
7750f403 PM	167	return NET_XMIT_SUCCESS;
1da177e4	168	}
9b22ea56	169
bcc6d479	170	static inline bool vlan_do_receive(struct sk_buff **skb)
9b22ea56	171	{
0988c4c7 JG	172	if ((*skb)->vlan_tci & VLAN_VID_MASK)
0988c4c7 JG	173	(*skb)->pkt_type = PACKET_OTHERHOST;
3701e513	174	return false;
9b22ea56	175	}
e1c096e2	176
bcc6d479 JP	177	inline struct sk_buff vlan_untag(struct sk_buff skb)
	178	{
	179	return skb;
	180	}
	181
c7c4b3b6 BH	182	static inline gro_result_t
	183	vlan_gro_receive(struct napi_struct napi, struct vlan_group grp,
	184	unsigned int vlan_tci, struct sk_buff *skb)
e1c096e2	185	{
c7c4b3b6	186	return GRO_DROP;
e1c096e2 HX	187	}
e1c096e2 HX	188
c7c4b3b6 BH	189	static inline gro_result_t
	190	vlan_gro_frags(struct napi_struct napi, struct vlan_group grp,
	191	unsigned int vlan_tci)
e1c096e2	192	{
c7c4b3b6	193	return GRO_DROP;
e1c096e2	194	}
7750f403	195	#endif
1da177e4	196
9bb8582e PM	197	/**
	198	* vlan_hwaccel_rx - netif_rx wrapper for VLAN RX acceleration
	199	* @skb: buffer
	200	* @grp: vlan group
	201	* @vlan_tci: VLAN TCI as received from the card
	202	*/
1da177e4 LT	203	static inline int vlan_hwaccel_rx(struct sk_buff *skb,
1da177e4 LT	204	struct vlan_group *grp,
9bb8582e	205	u16 vlan_tci)
1da177e4	206	{
9bb8582e	207	return __vlan_hwaccel_rx(skb, grp, vlan_tci, 0);
1da177e4 LT	208	}
1da177e4 LT	209
9bb8582e PM	210	/**
	211	* vlan_hwaccel_receive_skb - netif_receive_skb wrapper for VLAN RX acceleration
	212	* @skb: buffer
	213	* @grp: vlan group
	214	* @vlan_tci: VLAN TCI as received from the card
	215	*/
1da177e4 LT	216	static inline int vlan_hwaccel_receive_skb(struct sk_buff *skb,
1da177e4 LT	217	struct vlan_group *grp,
9bb8582e	218	u16 vlan_tci)
1da177e4	219	{
9bb8582e	220	return __vlan_hwaccel_rx(skb, grp, vlan_tci, 1);
1da177e4 LT	221	}
	222
	223	/**
	224	* __vlan_put_tag - regular VLAN tag inserting
	225	* @skb: skbuff to tag
9bb8582e	226	* @vlan_tci: VLAN TCI to insert
1da177e4 LT	227	*
	228	* Inserts the VLAN tag into @skb as part of the payload
	229	* Returns a VLAN tagged skb. If a new skb is created, @skb is freed.
9bb8582e	230	*
1da177e4 LT	231	* Following the skb_unshare() example, in case of error, the calling function
	232	* doesn't have to worry about freeing the original skb.
	233	*/
9bb8582e	234	static inline struct sk_buff __vlan_put_tag(struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	235	{
	236	struct vlan_ethhdr *veth;
	237
11a100f8 PM	238	if (skb_cow_head(skb, VLAN_HLEN) < 0) {
	239	kfree_skb(skb);
	240	return NULL;
1da177e4	241	}
1da177e4 LT	242	veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN);
	243
	244	/* Move the mac addresses to the beginning of the new header. */
	245	memmove(skb->data, skb->data + VLAN_HLEN, 2 * VLAN_ETH_ALEN);
e4dd6188	246	skb->mac_header -= VLAN_HLEN;
1da177e4 LT	247
1da177e4 LT	248	/* first, the ethernet type */
57d3ae84	249	veth->h_vlan_proto = htons(ETH_P_8021Q);
1da177e4	250
9bb8582e PM	251	/* now, the TCI */
9bb8582e PM	252	veth->h_vlan_TCI = htons(vlan_tci);
1da177e4	253
57d3ae84	254	skb->protocol = htons(ETH_P_8021Q);
1da177e4 LT	255
	256	return skb;
	257	}
	258
	259	/**
	260	* __vlan_hwaccel_put_tag - hardware accelerated VLAN inserting
	261	* @skb: skbuff to tag
9bb8582e	262	* @vlan_tci: VLAN TCI to insert
1da177e4	263	*
6aa895b0	264	* Puts the VLAN TCI in @skb->vlan_tci and lets the device do the rest
1da177e4	265	*/
9bb8582e PM	266	static inline struct sk_buff __vlan_hwaccel_put_tag(struct sk_buff skb,
9bb8582e PM	267	u16 vlan_tci)
1da177e4	268	{
05423b24	269	skb->vlan_tci = VLAN_TAG_PRESENT \| vlan_tci;
1da177e4 LT	270	return skb;
	271	}
	272
	273	#define HAVE_VLAN_PUT_TAG
	274
	275	/**
	276	* vlan_put_tag - inserts VLAN tag according to device features
	277	* @skb: skbuff to tag
9bb8582e	278	* @vlan_tci: VLAN TCI to insert
1da177e4 LT	279	*
	280	* Assumes skb->dev is the target that will xmit this frame.
	281	* Returns a VLAN tagged skb.
	282	*/
9bb8582e	283	static inline struct sk_buff vlan_put_tag(struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	284	{
1da177e4 LT	285	if (skb->dev->features & NETIF_F_HW_VLAN_TX) {
9bb8582e	286	return __vlan_hwaccel_put_tag(skb, vlan_tci);
1da177e4	287	} else {
9bb8582e	288	return __vlan_put_tag(skb, vlan_tci);
1da177e4 LT	289	}
	290	}
	291
	292	/**
	293	* __vlan_get_tag - get the VLAN ID that is part of the payload
	294	* @skb: skbuff to query
9bb8582e PM	295	* @vlan_tci: buffer to store vlaue
9bb8582e PM	296	*
1da177e4 LT	297	* Returns error if the skb is not of VLAN type
1da177e4 LT	298	*/
9bb8582e	299	static inline int __vlan_get_tag(const struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	300	{
	301	struct vlan_ethhdr veth = (struct vlan_ethhdr )skb->data;
	302
57d3ae84	303	if (veth->h_vlan_proto != htons(ETH_P_8021Q)) {
1da177e4 LT	304	return -EINVAL;
	305	}
	306
9bb8582e	307	*vlan_tci = ntohs(veth->h_vlan_TCI);
1da177e4 LT	308	return 0;
	309	}
	310
	311	/**
	312	* __vlan_hwaccel_get_tag - get the VLAN ID that is in @skb->cb[]
	313	* @skb: skbuff to query
9bb8582e PM	314	* @vlan_tci: buffer to store vlaue
9bb8582e PM	315	*
6aa895b0	316	* Returns error if @skb->vlan_tci is not set correctly
1da177e4	317	*/
18149935	318	static inline int __vlan_hwaccel_get_tag(const struct sk_buff *skb,
9bb8582e	319	u16 *vlan_tci)
1da177e4	320	{
6aa895b0	321	if (vlan_tx_tag_present(skb)) {
05423b24	322	*vlan_tci = vlan_tx_tag_get(skb);
1da177e4 LT	323	return 0;
1da177e4 LT	324	} else {
9bb8582e	325	*vlan_tci = 0;
1da177e4 LT	326	return -EINVAL;
	327	}
	328	}
	329
	330	#define HAVE_VLAN_GET_TAG
	331
	332	/**
	333	* vlan_get_tag - get the VLAN ID from the skb
	334	* @skb: skbuff to query
9bb8582e PM	335	* @vlan_tci: buffer to store vlaue
9bb8582e PM	336	*
1da177e4 LT	337	* Returns error if the skb is not VLAN tagged
1da177e4 LT	338	*/
9bb8582e	339	static inline int vlan_get_tag(const struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	340	{
1da177e4 LT	341	if (skb->dev->features & NETIF_F_HW_VLAN_TX) {
9bb8582e	342	return __vlan_hwaccel_get_tag(skb, vlan_tci);
1da177e4	343	} else {
9bb8582e	344	return __vlan_get_tag(skb, vlan_tci);
1da177e4 LT	345	}
	346	}
	347
0a85df00 HZ	348	/**
	349	* vlan_get_protocol - get protocol EtherType.
	350	* @skb: skbuff to query
	351	*
	352	* Returns the EtherType of the packet, regardless of whether it is
	353	* vlan encapsulated (normal or hardware accelerated) or not.
	354	*/
	355	static inline __be16 vlan_get_protocol(const struct sk_buff *skb)
	356	{
	357	__be16 protocol = 0;
	358
	359	if (vlan_tx_tag_present(skb) \|\|
	360	skb->protocol != cpu_to_be16(ETH_P_8021Q))
	361	protocol = skb->protocol;
	362	else {
	363	__be16 proto, *protop;
	364	protop = skb_header_pointer(skb, offsetof(struct vlan_ethhdr,
	365	h_vlan_encapsulated_proto),
	366	sizeof(proto), &proto);
	367	if (likely(protop))
	368	protocol = *protop;
	369	}
	370
	371	return protocol;
	372	}
1da177e4 LT	373	#endif /* __KERNEL__ */
	374
	375	/* VLAN IOCTLs are found in sockios.h */
	376
	377	/* Passed in vlan_ioctl_args structure to determine behaviour. */
	378	enum vlan_ioctl_cmds {
	379	ADD_VLAN_CMD,
	380	DEL_VLAN_CMD,
	381	SET_VLAN_INGRESS_PRIORITY_CMD,
	382	SET_VLAN_EGRESS_PRIORITY_CMD,
	383	GET_VLAN_INGRESS_PRIORITY_CMD,
	384	GET_VLAN_EGRESS_PRIORITY_CMD,
	385	SET_VLAN_NAME_TYPE_CMD,
	386	SET_VLAN_FLAG_CMD,
	387	GET_VLAN_REALDEV_NAME_CMD, /* If this works, you know it's a VLAN device, btw */
	388	GET_VLAN_VID_CMD /* Get the VID of this VLAN (specified by name) */
	389	};
	390
a4bf3af4 PM	391	enum vlan_flags {
a4bf3af4 PM	392	VLAN_FLAG_REORDER_HDR = 0x1,
70c03b49	393	VLAN_FLAG_GVRP = 0x2,
5e756593	394	VLAN_FLAG_LOOSE_BINDING = 0x4,
a4bf3af4 PM	395	};
a4bf3af4 PM	396
1da177e4 LT	397	enum vlan_name_types {
	398	VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */
	399	VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */
	400	VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */
	401	VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */
	402	VLAN_NAME_TYPE_HIGHEST
	403	};
	404
	405	struct vlan_ioctl_args {
	406	int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */
	407	char device1[24];
	408
	409	union {
	410	char device2[24];
	411	int VID;
	412	unsigned int skb_priority;
	413	unsigned int name_type;
	414	unsigned int bind_type;
	415	unsigned int flag; /* Matches vlan_dev_info flags */
	416	} u;
	417
	418	short vlan_qos;
	419	};
	420
	421	#endif /* !(_LINUX_IF_VLAN_H_) */