[mirror_ubuntu-artful-kernel.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;
}

/* VLAN tx hw acceleration helpers. */
struct vlan_skb_tx_cookie {
	u32	magic;
	u32	vlan_tag;
};

#define VLAN_TX_COOKIE_MAGIC	0x564c414e	/* "VLAN" in ascii. */
#define VLAN_TX_SKB_CB(__skb)	((struct vlan_skb_tx_cookie *)&((__skb)->cb[0]))
#define vlan_tx_tag_present(__skb) \
	(VLAN_TX_SKB_CB(__skb)->magic == VLAN_TX_COOKIE_MAGIC)
#define vlan_tx_tag_get(__skb)	(VLAN_TX_SKB_CB(__skb)->vlan_tag)

#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->cb[] and lets the device do the rest
 */
static inline struct sk_buff *__vlan_hwaccel_put_tag(struct sk_buff *skb,
						     u16 vlan_tci)
{
	struct vlan_skb_tx_cookie *cookie;

	cookie = VLAN_TX_SKB_CB(skb);
	cookie->magic = VLAN_TX_COOKIE_MAGIC;
	cookie->vlan_tag = 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->cb[] is not set correctly
 */
static inline int __vlan_hwaccel_get_tag(const struct sk_buff *skb,
					 u16 *vlan_tci)
{
	struct vlan_skb_tx_cookie *cookie;

	cookie = VLAN_TX_SKB_CB(skb);
	if (cookie->magic == VLAN_TX_COOKIE_MAGIC) {
		*vlan_tci = cookie->vlan_tag;
		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
1da177e4 LT	108	/* VLAN tx hw acceleration helpers. */
	109	struct vlan_skb_tx_cookie {
	110	u32 magic;
	111	u32 vlan_tag;
	112	};
	113
	114	#define VLAN_TX_COOKIE_MAGIC 0x564c414e /* "VLAN" in ascii. */
	115	#define VLAN_TX_SKB_CB(__skb) ((struct vlan_skb_tx_cookie *)&((__skb)->cb[0]))
	116	#define vlan_tx_tag_present(__skb) \
	117	(VLAN_TX_SKB_CB(__skb)->magic == VLAN_TX_COOKIE_MAGIC)
	118	#define vlan_tx_tag_get(__skb) (VLAN_TX_SKB_CB(__skb)->vlan_tag)
	119
7750f403	120	#if defined(CONFIG_VLAN_8021Q) \|\| defined(CONFIG_VLAN_8021Q_MODULE)
22d1ba74 PM	121	extern struct net_device vlan_dev_real_dev(const struct net_device dev);
	122	extern u16 vlan_dev_vlan_id(const struct net_device *dev);
	123
7750f403	124	extern int __vlan_hwaccel_rx(struct sk_buff skb, struct vlan_group grp,
9bb8582e	125	u16 vlan_tci, int polling);
7750f403	126	#else
22d1ba74 PM	127	static inline struct net_device vlan_dev_real_dev(const struct net_device dev)
	128	{
	129	BUG();
	130	return NULL;
	131	}
	132
	133	static inline u16 vlan_dev_vlan_id(const struct net_device *dev)
	134	{
	135	BUG();
	136	return 0;
	137	}
	138
7750f403	139	static inline int __vlan_hwaccel_rx(struct sk_buff skb, struct vlan_group grp,
9bb8582e	140	u16 vlan_tci, int polling)
1da177e4	141	{
7750f403 PM	142	BUG();
7750f403 PM	143	return NET_XMIT_SUCCESS;
1da177e4	144	}
7750f403	145	#endif
1da177e4	146
9bb8582e PM	147	/**
	148	* vlan_hwaccel_rx - netif_rx wrapper for VLAN RX acceleration
	149	* @skb: buffer
	150	* @grp: vlan group
	151	* @vlan_tci: VLAN TCI as received from the card
	152	*/
1da177e4 LT	153	static inline int vlan_hwaccel_rx(struct sk_buff *skb,
1da177e4 LT	154	struct vlan_group *grp,
9bb8582e	155	u16 vlan_tci)
1da177e4	156	{
9bb8582e	157	return __vlan_hwaccel_rx(skb, grp, vlan_tci, 0);
1da177e4 LT	158	}
1da177e4 LT	159
9bb8582e PM	160	/**
	161	* vlan_hwaccel_receive_skb - netif_receive_skb wrapper for VLAN RX acceleration
	162	* @skb: buffer
	163	* @grp: vlan group
	164	* @vlan_tci: VLAN TCI as received from the card
	165	*/
1da177e4 LT	166	static inline int vlan_hwaccel_receive_skb(struct sk_buff *skb,
1da177e4 LT	167	struct vlan_group *grp,
9bb8582e	168	u16 vlan_tci)
1da177e4	169	{
9bb8582e	170	return __vlan_hwaccel_rx(skb, grp, vlan_tci, 1);
1da177e4 LT	171	}
	172
	173	/**
	174	* __vlan_put_tag - regular VLAN tag inserting
	175	* @skb: skbuff to tag
9bb8582e	176	* @vlan_tci: VLAN TCI to insert
1da177e4 LT	177	*
	178	* Inserts the VLAN tag into @skb as part of the payload
	179	* Returns a VLAN tagged skb. If a new skb is created, @skb is freed.
9bb8582e	180	*
1da177e4 LT	181	* Following the skb_unshare() example, in case of error, the calling function
	182	* doesn't have to worry about freeing the original skb.
	183	*/
9bb8582e	184	static inline struct sk_buff __vlan_put_tag(struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	185	{
	186	struct vlan_ethhdr *veth;
	187
11a100f8 PM	188	if (skb_cow_head(skb, VLAN_HLEN) < 0) {
	189	kfree_skb(skb);
	190	return NULL;
1da177e4	191	}
1da177e4 LT	192	veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN);
	193
	194	/* Move the mac addresses to the beginning of the new header. */
	195	memmove(skb->data, skb->data + VLAN_HLEN, 2 * VLAN_ETH_ALEN);
	196
	197	/* first, the ethernet type */
57d3ae84	198	veth->h_vlan_proto = htons(ETH_P_8021Q);
1da177e4	199
9bb8582e PM	200	/* now, the TCI */
9bb8582e PM	201	veth->h_vlan_TCI = htons(vlan_tci);
1da177e4	202
57d3ae84	203	skb->protocol = htons(ETH_P_8021Q);
1da177e4 LT	204
	205	return skb;
	206	}
	207
	208	/**
	209	* __vlan_hwaccel_put_tag - hardware accelerated VLAN inserting
	210	* @skb: skbuff to tag
9bb8582e	211	* @vlan_tci: VLAN TCI to insert
1da177e4	212	*
9bb8582e	213	* Puts the VLAN TCI in @skb->cb[] and lets the device do the rest
1da177e4	214	*/
9bb8582e PM	215	static inline struct sk_buff __vlan_hwaccel_put_tag(struct sk_buff skb,
9bb8582e PM	216	u16 vlan_tci)
1da177e4 LT	217	{
	218	struct vlan_skb_tx_cookie *cookie;
	219
	220	cookie = VLAN_TX_SKB_CB(skb);
	221	cookie->magic = VLAN_TX_COOKIE_MAGIC;
9bb8582e	222	cookie->vlan_tag = vlan_tci;
1da177e4 LT	223
	224	return skb;
	225	}
	226
	227	#define HAVE_VLAN_PUT_TAG
	228
	229	/**
	230	* vlan_put_tag - inserts VLAN tag according to device features
	231	* @skb: skbuff to tag
9bb8582e	232	* @vlan_tci: VLAN TCI to insert
1da177e4 LT	233	*
	234	* Assumes skb->dev is the target that will xmit this frame.
	235	* Returns a VLAN tagged skb.
	236	*/
9bb8582e	237	static inline struct sk_buff vlan_put_tag(struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	238	{
1da177e4 LT	239	if (skb->dev->features & NETIF_F_HW_VLAN_TX) {
9bb8582e	240	return __vlan_hwaccel_put_tag(skb, vlan_tci);
1da177e4	241	} else {
9bb8582e	242	return __vlan_put_tag(skb, vlan_tci);
1da177e4 LT	243	}
	244	}
	245
	246	/**
	247	* __vlan_get_tag - get the VLAN ID that is part of the payload
	248	* @skb: skbuff to query
9bb8582e PM	249	* @vlan_tci: buffer to store vlaue
9bb8582e PM	250	*
1da177e4 LT	251	* Returns error if the skb is not of VLAN type
1da177e4 LT	252	*/
9bb8582e	253	static inline int __vlan_get_tag(const struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	254	{
	255	struct vlan_ethhdr veth = (struct vlan_ethhdr )skb->data;
	256
57d3ae84	257	if (veth->h_vlan_proto != htons(ETH_P_8021Q)) {
1da177e4 LT	258	return -EINVAL;
	259	}
	260
9bb8582e	261	*vlan_tci = ntohs(veth->h_vlan_TCI);
1da177e4 LT	262	return 0;
	263	}
	264
	265	/**
	266	* __vlan_hwaccel_get_tag - get the VLAN ID that is in @skb->cb[]
	267	* @skb: skbuff to query
9bb8582e PM	268	* @vlan_tci: buffer to store vlaue
9bb8582e PM	269	*
1da177e4 LT	270	* Returns error if @skb->cb[] is not set correctly
1da177e4 LT	271	*/
18149935	272	static inline int __vlan_hwaccel_get_tag(const struct sk_buff *skb,
9bb8582e	273	u16 *vlan_tci)
1da177e4 LT	274	{
	275	struct vlan_skb_tx_cookie *cookie;
	276
	277	cookie = VLAN_TX_SKB_CB(skb);
	278	if (cookie->magic == VLAN_TX_COOKIE_MAGIC) {
9bb8582e	279	*vlan_tci = cookie->vlan_tag;
1da177e4 LT	280	return 0;
1da177e4 LT	281	} else {
9bb8582e	282	*vlan_tci = 0;
1da177e4 LT	283	return -EINVAL;
	284	}
	285	}
	286
	287	#define HAVE_VLAN_GET_TAG
	288
	289	/**
	290	* vlan_get_tag - get the VLAN ID from the skb
	291	* @skb: skbuff to query
9bb8582e PM	292	* @vlan_tci: buffer to store vlaue
9bb8582e PM	293	*
1da177e4 LT	294	* Returns error if the skb is not VLAN tagged
1da177e4 LT	295	*/
9bb8582e	296	static inline int vlan_get_tag(const struct sk_buff skb, u16 vlan_tci)
1da177e4 LT	297	{
1da177e4 LT	298	if (skb->dev->features & NETIF_F_HW_VLAN_TX) {
9bb8582e	299	return __vlan_hwaccel_get_tag(skb, vlan_tci);
1da177e4	300	} else {
9bb8582e	301	return __vlan_get_tag(skb, vlan_tci);
1da177e4 LT	302	}
	303	}
	304
	305	#endif /* __KERNEL__ */
	306
	307	/* VLAN IOCTLs are found in sockios.h */
	308
	309	/* Passed in vlan_ioctl_args structure to determine behaviour. */
	310	enum vlan_ioctl_cmds {
	311	ADD_VLAN_CMD,
	312	DEL_VLAN_CMD,
	313	SET_VLAN_INGRESS_PRIORITY_CMD,
	314	SET_VLAN_EGRESS_PRIORITY_CMD,
	315	GET_VLAN_INGRESS_PRIORITY_CMD,
	316	GET_VLAN_EGRESS_PRIORITY_CMD,
	317	SET_VLAN_NAME_TYPE_CMD,
	318	SET_VLAN_FLAG_CMD,
	319	GET_VLAN_REALDEV_NAME_CMD, /* If this works, you know it's a VLAN device, btw */
	320	GET_VLAN_VID_CMD /* Get the VID of this VLAN (specified by name) */
	321	};
	322
a4bf3af4 PM	323	enum vlan_flags {
a4bf3af4 PM	324	VLAN_FLAG_REORDER_HDR = 0x1,
70c03b49	325	VLAN_FLAG_GVRP = 0x2,
a4bf3af4 PM	326	};
a4bf3af4 PM	327
1da177e4 LT	328	enum vlan_name_types {
	329	VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */
	330	VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */
	331	VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */
	332	VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */
	333	VLAN_NAME_TYPE_HIGHEST
	334	};
	335
	336	struct vlan_ioctl_args {
	337	int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */
	338	char device1[24];
	339
	340	union {
	341	char device2[24];
	342	int VID;
	343	unsigned int skb_priority;
	344	unsigned int name_type;
	345	unsigned int bind_type;
	346	unsigned int flag; /* Matches vlan_dev_info flags */
	347	} u;
	348
	349	short vlan_qos;
	350	};
	351
	352	#endif /* !(_LINUX_IF_VLAN_H_) */