1 #ifndef __BEN_VLAN_802_1Q_INC__
2 #define __BEN_VLAN_802_1Q_INC__
3
4 #include <linux/if_vlan.h>
5 #include <linux/u64_stats_sync.h>
6 #include <linux/list.h>
7
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
15 enum vlan_protos {
16 VLAN_PROTO_8021Q = 0,
17 VLAN_PROTO_8021AD,
18 VLAN_PROTO_NUM,
19 };
20
21 struct vlan_group {
22 unsigned int nr_vlan_devs;
23 struct hlist_node hlist; /* linked list */
24 struct net_device **vlan_devices_arrays[VLAN_PROTO_NUM]
25 [VLAN_GROUP_ARRAY_SPLIT_PARTS];
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
vlan_proto_idx(__be16 proto)38 static inline unsigned int vlan_proto_idx(__be16 proto)
39 {
40 switch (proto) {
41 case htons(ETH_P_8021Q):
42 return VLAN_PROTO_8021Q;
43 case htons(ETH_P_8021AD):
44 return VLAN_PROTO_8021AD;
45 default:
46 BUG();
47 return 0;
48 }
49 }
50
__vlan_group_get_device(struct vlan_group * vg,unsigned int pidx,u16 vlan_id)51 static inline struct net_device *__vlan_group_get_device(struct vlan_group *vg,
52 unsigned int pidx,
53 u16 vlan_id)
54 {
55 struct net_device **array;
56
57 array = vg->vlan_devices_arrays[pidx]
58 [vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
59 return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
60 }
61
vlan_group_get_device(struct vlan_group * vg,__be16 vlan_proto,u16 vlan_id)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
vlan_group_set_device(struct vlan_group * vg,__be16 vlan_proto,u16 vlan_id,struct net_device * dev)69 static inline void vlan_group_set_device(struct vlan_group *vg,
70 __be16 vlan_proto, u16 vlan_id,
71 struct net_device *dev)
72 {
73 struct net_device **array;
74 if (!vg)
75 return;
76 array = vg->vlan_devices_arrays[vlan_proto_idx(vlan_proto)]
77 [vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
78 array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
79 }
80
81 /* Must be invoked with rcu_read_lock or with RTNL. */
vlan_find_dev(struct net_device * real_dev,__be16 vlan_proto,u16 vlan_id)82 static inline struct net_device *vlan_find_dev(struct net_device *real_dev,
83 __be16 vlan_proto, u16 vlan_id)
84 {
85 struct vlan_info *vlan_info = rcu_dereference_rtnl(real_dev->vlan_info);
86
87 if (vlan_info)
88 return vlan_group_get_device(&vlan_info->grp,
89 vlan_proto, vlan_id);
90
91 return NULL;
92 }
93
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
99 /* found in vlan_dev.c */
100 void vlan_dev_set_ingress_priority(const struct net_device *dev,
101 u32 skb_prio, u16 vlan_prio);
102 int vlan_dev_set_egress_priority(const struct net_device *dev,
103 u32 skb_prio, u16 vlan_prio);
104 int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
105 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result);
106
107 int vlan_check_real_dev(struct net_device *real_dev,
108 __be16 protocol, u16 vlan_id);
109 void vlan_setup(struct net_device *dev);
110 int register_vlan_dev(struct net_device *dev);
111 void unregister_vlan_dev(struct net_device *dev, struct list_head *head);
112 bool vlan_dev_inherit_address(struct net_device *dev,
113 struct net_device *real_dev);
114
vlan_get_ingress_priority(struct net_device * dev,u16 vlan_tci)115 static inline u32 vlan_get_ingress_priority(struct net_device *dev,
116 u16 vlan_tci)
117 {
118 struct vlan_dev_priv *vip = vlan_dev_priv(dev);
119
120 return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7];
121 }
122
123 #ifdef CONFIG_VLAN_8021Q_GVRP
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);
130 #else
vlan_gvrp_request_join(const struct net_device * dev)131 static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; }
vlan_gvrp_request_leave(const struct net_device * dev)132 static inline void vlan_gvrp_request_leave(const struct net_device *dev) {}
vlan_gvrp_init_applicant(struct net_device * dev)133 static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; }
vlan_gvrp_uninit_applicant(struct net_device * dev)134 static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {}
vlan_gvrp_init(void)135 static inline int vlan_gvrp_init(void) { return 0; }
vlan_gvrp_uninit(void)136 static inline void vlan_gvrp_uninit(void) {}
137 #endif
138
139 #ifdef CONFIG_VLAN_8021Q_MVRP
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);
146 #else
vlan_mvrp_request_join(const struct net_device * dev)147 static inline int vlan_mvrp_request_join(const struct net_device *dev) { return 0; }
vlan_mvrp_request_leave(const struct net_device * dev)148 static inline void vlan_mvrp_request_leave(const struct net_device *dev) {}
vlan_mvrp_init_applicant(struct net_device * dev)149 static inline int vlan_mvrp_init_applicant(struct net_device *dev) { return 0; }
vlan_mvrp_uninit_applicant(struct net_device * dev)150 static inline void vlan_mvrp_uninit_applicant(struct net_device *dev) {}
vlan_mvrp_init(void)151 static inline int vlan_mvrp_init(void) { return 0; }
vlan_mvrp_uninit(void)152 static inline void vlan_mvrp_uninit(void) {}
153 #endif
154
155 extern const char vlan_fullname[];
156 extern const char vlan_version[];
157 int vlan_netlink_init(void);
158 void vlan_netlink_fini(void);
159
160 extern struct rtnl_link_ops vlan_link_ops;
161
162 extern int vlan_net_id;
163
164 struct proc_dir_entry;
165
166 struct vlan_net {
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;
171 /* Determines interface naming scheme. */
172 unsigned short name_type;
173 };
174
175 #endif /* !(__BEN_VLAN_802_1Q_INC__) */
176