[mirror_ubuntu-artful-kernel.git] / net / 8021q / vlan.h

#ifndef __BEN_VLAN_802_1Q_INC__
#define __BEN_VLAN_802_1Q_INC__

#include <linux/if_vlan.h>
#include <linux/u64_stats_sync.h>
#include <linux/list.h>

/* 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)

enum vlan_protos {
	VLAN_PROTO_8021Q	= 0,
	VLAN_PROTO_8021AD,
	VLAN_PROTO_NUM,
};

struct vlan_group {
	unsigned int		nr_vlan_devs;
	struct hlist_node	hlist;	/* linked list */
	struct net_device **vlan_devices_arrays[VLAN_PROTO_NUM]
					       [VLAN_GROUP_ARRAY_SPLIT_PARTS];
};

struct vlan_info {
	struct net_device	*real_dev; /* The ethernet(like) device
					    * the vlan is attached to.
					    */
	struct vlan_group	grp;
	struct list_head	vid_list;
	unsigned int		nr_vids;
	struct rcu_head		rcu;
};

static inline unsigned int vlan_proto_idx(__be16 proto)
{
	switch (proto) {
	case htons(ETH_P_8021Q):
		return VLAN_PROTO_8021Q;
	case htons(ETH_P_8021AD):
		return VLAN_PROTO_8021AD;
	default:
		BUG();
		return 0;
	}
}

static inline struct net_device *__vlan_group_get_device(struct vlan_group *vg,
							 unsigned int pidx,
							 u16 vlan_id)
{
	struct net_device **array;

	array = vg->vlan_devices_arrays[pidx]
				       [vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
	return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
}

static inline struct net_device *vlan_group_get_device(struct vlan_group *vg,
						       __be16 vlan_proto,
						       u16 vlan_id)
{
	return __vlan_group_get_device(vg, vlan_proto_idx(vlan_proto), vlan_id);
}

static inline void vlan_group_set_device(struct vlan_group *vg,
					 __be16 vlan_proto, u16 vlan_id,
					 struct net_device *dev)
{
	struct net_device **array;
	if (!vg)
		return;
	array = vg->vlan_devices_arrays[vlan_proto_idx(vlan_proto)]
				       [vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
	array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
}

/* Must be invoked with rcu_read_lock or with RTNL. */
static inline struct net_device *vlan_find_dev(struct net_device *real_dev,
					       __be16 vlan_proto, u16 vlan_id)
{
	struct vlan_info *vlan_info = rcu_dereference_rtnl(real_dev->vlan_info);

	if (vlan_info)
		return vlan_group_get_device(&vlan_info->grp,
					     vlan_proto, vlan_id);

	return NULL;
}

#define vlan_group_for_each_dev(grp, i, dev) \
	for ((i) = 0; i < VLAN_PROTO_NUM * VLAN_N_VID; i++) \
		if (((dev) = __vlan_group_get_device((grp), (i) / VLAN_N_VID, \
							    (i) % VLAN_N_VID)))

/* found in vlan_dev.c */
void vlan_dev_set_ingress_priority(const struct net_device *dev,
				   u32 skb_prio, u16 vlan_prio);
int vlan_dev_set_egress_priority(const struct net_device *dev,
				 u32 skb_prio, u16 vlan_prio);
int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
void vlan_dev_get_realdev_name(const struct net_device *dev, char *result);

int vlan_check_real_dev(struct net_device *real_dev,
			__be16 protocol, u16 vlan_id);
void vlan_setup(struct net_device *dev);
int register_vlan_dev(struct net_device *dev);
void unregister_vlan_dev(struct net_device *dev, struct list_head *head);
bool vlan_dev_inherit_address(struct net_device *dev,
			      struct net_device *real_dev);

static inline u32 vlan_get_ingress_priority(struct net_device *dev,
					    u16 vlan_tci)
{
	struct vlan_dev_priv *vip = vlan_dev_priv(dev);

	return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7];
}

#ifdef CONFIG_VLAN_8021Q_GVRP
int vlan_gvrp_request_join(const struct net_device *dev);
void vlan_gvrp_request_leave(const struct net_device *dev);
int vlan_gvrp_init_applicant(struct net_device *dev);
void vlan_gvrp_uninit_applicant(struct net_device *dev);
int vlan_gvrp_init(void);
void vlan_gvrp_uninit(void);
#else
static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; }
static inline void vlan_gvrp_request_leave(const struct net_device *dev) {}
static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; }
static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {}
static inline int vlan_gvrp_init(void) { return 0; }
static inline void vlan_gvrp_uninit(void) {}
#endif

#ifdef CONFIG_VLAN_8021Q_MVRP
int vlan_mvrp_request_join(const struct net_device *dev);
void vlan_mvrp_request_leave(const struct net_device *dev);
int vlan_mvrp_init_applicant(struct net_device *dev);
void vlan_mvrp_uninit_applicant(struct net_device *dev);
int vlan_mvrp_init(void);
void vlan_mvrp_uninit(void);
#else
static inline int vlan_mvrp_request_join(const struct net_device *dev) { return 0; }
static inline void vlan_mvrp_request_leave(const struct net_device *dev) {}
static inline int vlan_mvrp_init_applicant(struct net_device *dev) { return 0; }
static inline void vlan_mvrp_uninit_applicant(struct net_device *dev) {}
static inline int vlan_mvrp_init(void) { return 0; }
static inline void vlan_mvrp_uninit(void) {}
#endif

extern const char vlan_fullname[];
extern const char vlan_version[];
int vlan_netlink_init(void);
void vlan_netlink_fini(void);

extern struct rtnl_link_ops vlan_link_ops;

extern unsigned int vlan_net_id;

struct proc_dir_entry;

struct vlan_net {
	/* /proc/net/vlan */
	struct proc_dir_entry *proc_vlan_dir;
	/* /proc/net/vlan/config */
	struct proc_dir_entry *proc_vlan_conf;
	/* Determines interface naming scheme. */
	unsigned short name_type;
};

#endif /* !(__BEN_VLAN_802_1Q_INC__) */
Commit	Line	Data
1da177e4 LT	1	#ifndef __BEN_VLAN_802_1Q_INC__
	2	#define __BEN_VLAN_802_1Q_INC__
	3
	4	#include <linux/if_vlan.h>
9618e2ff	5	#include <linux/u64_stats_sync.h>
5b9ea6e0	6	#include <linux/list.h>
1da177e4	7
5b9ea6e0 JP	8	/* if this changes, algorithm will have to be reworked because this
	9	* depends on completely exhausting the VLAN identifier space. Thus
	10	* it gives constant time look-up, but in many cases it wastes memory.
	11	*/
	12	#define VLAN_GROUP_ARRAY_SPLIT_PARTS 8
	13	#define VLAN_GROUP_ARRAY_PART_LEN (VLAN_N_VID/VLAN_GROUP_ARRAY_SPLIT_PARTS)
	14
1fd9b1fc PM	15	enum vlan_protos {
1fd9b1fc PM	16	VLAN_PROTO_8021Q = 0,
8ad227ff	17	VLAN_PROTO_8021AD,
1fd9b1fc PM	18	VLAN_PROTO_NUM,
	19	};
	20
5b9ea6e0 JP	21	struct vlan_group {
	22	unsigned int nr_vlan_devs;
	23	struct hlist_node hlist; /* linked list */
1fd9b1fc PM	24	struct net_device **vlan_devices_arrays[VLAN_PROTO_NUM]
1fd9b1fc PM	25	[VLAN_GROUP_ARRAY_SPLIT_PARTS];
5b9ea6e0 JP	26	};
	27
	28	struct vlan_info {
	29	struct net_device real_dev; / The ethernet(like) device
	30	* the vlan is attached to.
	31	*/
	32	struct vlan_group grp;
	33	struct list_head vid_list;
	34	unsigned int nr_vids;
	35	struct rcu_head rcu;
	36	};
	37
1fd9b1fc PM	38	static inline unsigned int vlan_proto_idx(__be16 proto)
	39	{
	40	switch (proto) {
f0e78826	41	case htons(ETH_P_8021Q):
1fd9b1fc	42	return VLAN_PROTO_8021Q;
f0e78826	43	case htons(ETH_P_8021AD):
8ad227ff	44	return VLAN_PROTO_8021AD;
1fd9b1fc PM	45	default:
1fd9b1fc PM	46	BUG();
8da63a65	47	return 0;
1fd9b1fc PM	48	}
	49	}
	50
	51	static inline struct net_device __vlan_group_get_device(struct vlan_group vg,
	52	unsigned int pidx,
	53	u16 vlan_id)
536d1d4a JP	54	{
536d1d4a JP	55	struct net_device **array;
1fd9b1fc PM	56
	57	array = vg->vlan_devices_arrays[pidx]
	58	[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
536d1d4a JP	59	return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
	60	}
	61
1fd9b1fc PM	62	static inline struct net_device vlan_group_get_device(struct vlan_group vg,
	63	__be16 vlan_proto,
	64	u16 vlan_id)
	65	{
	66	return __vlan_group_get_device(vg, vlan_proto_idx(vlan_proto), vlan_id);
	67	}
	68
536d1d4a	69	static inline void vlan_group_set_device(struct vlan_group *vg,
1fd9b1fc	70	__be16 vlan_proto, u16 vlan_id,
536d1d4a JP	71	struct net_device *dev)
	72	{
	73	struct net_device **array;
	74	if (!vg)
	75	return;
1fd9b1fc PM	76	array = vg->vlan_devices_arrays[vlan_proto_idx(vlan_proto)]
1fd9b1fc PM	77	[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
536d1d4a JP	78	array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
	79	}
	80
69ecca86 DL	81	/* Must be invoked with rcu_read_lock or with RTNL. */
69ecca86 DL	82	static inline struct net_device vlan_find_dev(struct net_device real_dev,
1fd9b1fc	83	__be16 vlan_proto, u16 vlan_id)
69ecca86	84	{
5b9ea6e0	85	struct vlan_info *vlan_info = rcu_dereference_rtnl(real_dev->vlan_info);
69ecca86	86
5b9ea6e0	87	if (vlan_info)
1fd9b1fc PM	88	return vlan_group_get_device(&vlan_info->grp,
1fd9b1fc PM	89	vlan_proto, vlan_id);
69ecca86 DL	90
	91	return NULL;
	92	}
	93
1fd9b1fc PM	94	#define vlan_group_for_each_dev(grp, i, dev) \
	95	for ((i) = 0; i < VLAN_PROTO_NUM * VLAN_N_VID; i++) \
	96	if (((dev) = __vlan_group_get_device((grp), (i) / VLAN_N_VID, \
	97	(i) % VLAN_N_VID)))
	98
1da177e4	99	/* found in vlan_dev.c */
c17d8874	100	void vlan_dev_set_ingress_priority(const struct net_device *dev,
9bb8582e	101	u32 skb_prio, u16 vlan_prio);
c17d8874	102	int vlan_dev_set_egress_priority(const struct net_device *dev,
9bb8582e	103	u32 skb_prio, u16 vlan_prio);
b3ce0325	104	int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
c17d8874	105	void vlan_dev_get_realdev_name(const struct net_device dev, char result);
1da177e4	106
1fd9b1fc PM	107	int vlan_check_real_dev(struct net_device *real_dev,
1fd9b1fc PM	108	__be16 protocol, u16 vlan_id);
07b5b17e PM	109	void vlan_setup(struct net_device *dev);
07b5b17e PM	110	int register_vlan_dev(struct net_device *dev);
23289a37	111	void unregister_vlan_dev(struct net_device dev, struct list_head head);
308453aa MM	112	bool vlan_dev_inherit_address(struct net_device *dev,
308453aa MM	113	struct net_device *real_dev);
07b5b17e	114
7750f403	115	static inline u32 vlan_get_ingress_priority(struct net_device *dev,
9bb8582e	116	u16 vlan_tci)
7750f403	117	{
7da82c06	118	struct vlan_dev_priv *vip = vlan_dev_priv(dev);
7750f403	119
05423b24	120	return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7];
7750f403 PM	121	}
7750f403 PM	122
70c03b49	123	#ifdef CONFIG_VLAN_8021Q_GVRP
348662a1 JP	124	int vlan_gvrp_request_join(const struct net_device *dev);
	125	void vlan_gvrp_request_leave(const struct net_device *dev);
	126	int vlan_gvrp_init_applicant(struct net_device *dev);
	127	void vlan_gvrp_uninit_applicant(struct net_device *dev);
	128	int vlan_gvrp_init(void);
	129	void vlan_gvrp_uninit(void);
70c03b49 PM	130	#else
	131	static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; }
	132	static inline void vlan_gvrp_request_leave(const struct net_device *dev) {}
	133	static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; }
	134	static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {}
	135	static inline int vlan_gvrp_init(void) { return 0; }
	136	static inline void vlan_gvrp_uninit(void) {}
	137	#endif
	138
86fbe9bb	139	#ifdef CONFIG_VLAN_8021Q_MVRP
348662a1 JP	140	int vlan_mvrp_request_join(const struct net_device *dev);
	141	void vlan_mvrp_request_leave(const struct net_device *dev);
	142	int vlan_mvrp_init_applicant(struct net_device *dev);
	143	void vlan_mvrp_uninit_applicant(struct net_device *dev);
	144	int vlan_mvrp_init(void);
	145	void vlan_mvrp_uninit(void);
86fbe9bb DW	146	#else
	147	static inline int vlan_mvrp_request_join(const struct net_device *dev) { return 0; }
	148	static inline void vlan_mvrp_request_leave(const struct net_device *dev) {}
	149	static inline int vlan_mvrp_init_applicant(struct net_device *dev) { return 0; }
	150	static inline void vlan_mvrp_uninit_applicant(struct net_device *dev) {}
	151	static inline int vlan_mvrp_init(void) { return 0; }
	152	static inline void vlan_mvrp_uninit(void) {}
	153	#endif
	154
b3020061 SH	155	extern const char vlan_fullname[];
b3020061 SH	156	extern const char vlan_version[];
348662a1 JP	157	int vlan_netlink_init(void);
348662a1 JP	158	void vlan_netlink_fini(void);
07b5b17e PM	159
	160	extern struct rtnl_link_ops vlan_link_ops;
	161
c7d03a00	162	extern unsigned int vlan_net_id;
d9ed0f0e	163
a59a8c1c PE	164	struct proc_dir_entry;
a59a8c1c PE	165
d9ed0f0e	166	struct vlan_net {
a59a8c1c PE	167	/* /proc/net/vlan */
	168	struct proc_dir_entry *proc_vlan_dir;
	169	/* /proc/net/vlan/config */
	170	struct proc_dir_entry *proc_vlan_conf;
7a17a2f7 PE	171	/* Determines interface naming scheme. */
7a17a2f7 PE	172	unsigned short name_type;
d9ed0f0e PE	173	};
d9ed0f0e PE	174
1da177e4	175	#endif /* !(__BEN_VLAN_802_1Q_INC__) */