WebSVN - shark - Blame - Rev 422 - /shark/trunk/drivers/linuxc26/include/linux/if

Rev	Author	Line No.	Line
422	giacomo	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__
		17
		18	/* externally defined structs */
		19	struct vlan_group;
		20	struct net_device;
		21	struct sk_buff;
		22	struct packet_type;
		23	struct vlan_collection;
		24	struct vlan_dev_info;
		25
		26	#include <linux/proc_fs.h> /* for proc_dir_entry */
		27	#include <linux/netdevice.h>
		28
		29	#define VLAN_HLEN 4 /* The additional bytes (on top of the Ethernet header)
		30	* that VLAN requires.
		31	*/
		32	#define VLAN_ETH_ALEN 6 /* Octets in one ethernet addr */
		33	#define VLAN_ETH_HLEN 18 /* Total octets in header. */
		34	#define VLAN_ETH_ZLEN 64 /* Min. octets in frame sans FCS */
		35
		36	/*
		37	* According to 802.3ac, the packet can be 4 bytes longer. --Klika Jan
		38	*/
		39	#define VLAN_ETH_DATA_LEN 1500 /* Max. octets in payload */
		40	#define VLAN_ETH_FRAME_LEN 1518 /* Max. octets in frame sans FCS */
		41
		42	struct vlan_ethhdr {
		43	unsigned char h_dest[ETH_ALEN]; /* destination eth addr */
		44	unsigned char h_source[ETH_ALEN]; /* source ether addr */
		45	unsigned short h_vlan_proto; /* Should always be 0x8100 */
		46	unsigned short h_vlan_TCI; /* Encapsulates priority and VLAN ID */
		47	unsigned short h_vlan_encapsulated_proto; /* packet type ID field (or len) */
		48	};
		49
		50	struct vlan_hdr {
		51	unsigned short h_vlan_TCI; /* Encapsulates priority and VLAN ID */
		52	unsigned short h_vlan_encapsulated_proto; /* packet type ID field (or len) */
		53	};
		54
		55	#define VLAN_VID_MASK 0xfff
		56
		57	/* found in socket.c */
		58	extern void vlan_ioctl_set(int (*hook)(unsigned long));
		59
		60	#define VLAN_NAME "vlan"
		61
		62	/* if this changes, algorithm will have to be reworked because this
		63	* depends on completely exhausting the VLAN identifier space. Thus
		64	* it gives constant time look-up, but in many cases it wastes memory.
		65	*/
		66	#define VLAN_GROUP_ARRAY_LEN 4096
		67
		68	struct vlan_group {
		69	int real_dev_ifindex; /* The ifindex of the ethernet(like) device the vlan is attached to. */
		70	struct net_device *vlan_devices[VLAN_GROUP_ARRAY_LEN];
		71
		72	struct vlan_group next; / the next in the list */
		73	};
		74
		75	struct vlan_priority_tci_mapping {
		76	unsigned long priority;
		77	unsigned short vlan_qos; /* This should be shifted when first set, so we only do it
		78	* at provisioning time.
		79	* ((skb->priority << 13) & 0xE000)
		80	*/
		81	struct vlan_priority_tci_mapping *next;
		82	};
		83
		84	/* Holds information that makes sense if this device is a VLAN device. */
		85	struct vlan_dev_info {
		86	/** This will be the mapping that correlates skb->priority to
		87	* 3 bits of VLAN QOS tags...
		88	*/
		89	unsigned long ingress_priority_map[8];
		90	struct vlan_priority_tci_mapping egress_priority_map[16]; / hash table */
		91
		92	unsigned short vlan_id; /* The VLAN Identifier for this interface. */
		93	unsigned short flags; /* (1 << 0) re_order_header This option will cause the
		94	* VLAN code to move around the ethernet header on
		95	* ingress to make the skb look exactly like it
		96	* came in from an ethernet port. This destroys some of
		97	* the VLAN information in the skb, but it fixes programs
		98	* like DHCP that use packet-filtering and don't understand
		99	* 802.1Q
		100	*/
		101	struct dev_mc_list old_mc_list; / old multi-cast list for the VLAN interface..
		102	* we save this so we can tell what changes were
		103	* made, in order to feed the right changes down
		104	* to the real hardware...
		105	*/
		106	int old_allmulti; /* similar to above. */
		107	int old_promiscuity; /* similar to above. */
		108	struct net_device real_dev; / the underlying device/interface */
		109	struct proc_dir_entry dent; / Holds the proc data */
		110	unsigned long cnt_inc_headroom_on_tx; /* How many times did we have to grow the skb on TX. */
		111	unsigned long cnt_encap_on_xmit; /* How many times did we have to encapsulate the skb on TX. */
		112	struct net_device_stats dev_stats; /* Device stats (rx-bytes, tx-pkts, etc...) */
		113	};
		114
		115	#define VLAN_DEV_INFO(x) ((struct vlan_dev_info *)(x->priv))
		116
		117	/* inline functions */
		118
		119	static inline struct net_device_stats vlan_dev_get_stats(struct net_device dev)
		120	{
		121	return &(VLAN_DEV_INFO(dev)->dev_stats);
		122	}
		123
		124	static inline __u32 vlan_get_ingress_priority(struct net_device *dev,
		125	unsigned short vlan_tag)
		126	{
		127	struct vlan_dev_info *vip = VLAN_DEV_INFO(dev);
		128
		129	return vip->ingress_priority_map[(vlan_tag >> 13) & 0x7];
		130	}
		131
		132	/* VLAN tx hw acceleration helpers. */
		133	struct vlan_skb_tx_cookie {
		134	u32 magic;
		135	u32 vlan_tag;
		136	};
		137
		138	#define VLAN_TX_COOKIE_MAGIC 0x564c414e /* "VLAN" in ascii. */
		139	#define VLAN_TX_SKB_CB(__skb) ((struct vlan_skb_tx_cookie *)&((__skb)->cb[0]))
		140	#define vlan_tx_tag_present(__skb) \
		141	(VLAN_TX_SKB_CB(__skb)->magic == VLAN_TX_COOKIE_MAGIC)
		142	#define vlan_tx_tag_get(__skb) (VLAN_TX_SKB_CB(__skb)->vlan_tag)
		143
		144	/* VLAN rx hw acceleration helper. This acts like netif_{rx,receive_skb}(). */
		145	static inline int __vlan_hwaccel_rx(struct sk_buff *skb,
		146	struct vlan_group *grp,
		147	unsigned short vlan_tag, int polling)
		148	{
		149	struct net_device_stats *stats;
		150
		151	skb->real_dev = skb->dev;
		152	skb->dev = grp->vlan_devices[vlan_tag & VLAN_VID_MASK];
		153	if (skb->dev == NULL) {
		154	kfree_skb(skb);
		155
		156	/* Not NET_RX_DROP, this is not being dropped
		157	* due to congestion.
		158	*/
		159	return 0;
		160	}
		161
		162	skb->dev->last_rx = jiffies;
		163
		164	stats = vlan_dev_get_stats(skb->dev);
		165	stats->rx_packets++;
		166	stats->rx_bytes += skb->len;
		167
		168	skb->priority = vlan_get_ingress_priority(skb->dev, vlan_tag);
		169	switch (skb->pkt_type) {
		170	case PACKET_BROADCAST:
		171	break;
		172
		173	case PACKET_MULTICAST:
		174	stats->multicast++;
		175	break;
		176
		177	case PACKET_OTHERHOST:
		178	/* Our lower layer thinks this is not local, let's make sure.
		179	* This allows the VLAN to have a different MAC than the underlying
		180	* device, and still route correctly.
		181	*/
		182	if (!memcmp(skb->mac.ethernet->h_dest, skb->dev->dev_addr, ETH_ALEN))
		183	skb->pkt_type = PACKET_HOST;
		184	break;
		185	};
		186
		187	return (polling ? netif_receive_skb(skb) : netif_rx(skb));
		188	}
		189
		190	static inline int vlan_hwaccel_rx(struct sk_buff *skb,
		191	struct vlan_group *grp,
		192	unsigned short vlan_tag)
		193	{
		194	return __vlan_hwaccel_rx(skb, grp, vlan_tag, 0);
		195	}
		196
		197	static inline int vlan_hwaccel_receive_skb(struct sk_buff *skb,
		198	struct vlan_group *grp,
		199	unsigned short vlan_tag)
		200	{
		201	return __vlan_hwaccel_rx(skb, grp, vlan_tag, 1);
		202	}
		203	#endif /* __KERNEL__ */
		204
		205	/* VLAN IOCTLs are found in sockios.h */
		206
		207	/* Passed in vlan_ioctl_args structure to determine behaviour. */
		208	enum vlan_ioctl_cmds {
		209	ADD_VLAN_CMD,
		210	DEL_VLAN_CMD,
		211	SET_VLAN_INGRESS_PRIORITY_CMD,
		212	SET_VLAN_EGRESS_PRIORITY_CMD,
		213	GET_VLAN_INGRESS_PRIORITY_CMD,
		214	GET_VLAN_EGRESS_PRIORITY_CMD,
		215	SET_VLAN_NAME_TYPE_CMD,
		216	SET_VLAN_FLAG_CMD
		217	};
		218
		219	enum vlan_name_types {
		220	VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */
		221	VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */
		222	VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */
		223	VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */
		224	VLAN_NAME_TYPE_HIGHEST
		225	};
		226
		227	struct vlan_ioctl_args {
		228	int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */
		229	char device1[24];
		230
		231	union {
		232	char device2[24];
		233	int VID;
		234	unsigned int skb_priority;
		235	unsigned int name_type;
		236	unsigned int bind_type;
		237	unsigned int flag; /* Matches vlan_dev_info flags */
		238	} u;
		239
		240	short vlan_qos;
		241	};
		242
		243	#endif /* !(_LINUX_IF_VLAN_H_) */

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(root)/shark/trunk/drivers/linuxc26/include/linux/if_vlan.h - Rev 422