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b2441318 1/* SPDX-License-Identifier: GPL-2.0 */
1da177e4
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2#ifndef __BEN_VLAN_802_1Q_INC__
3#define __BEN_VLAN_802_1Q_INC__
4
5#include <linux/if_vlan.h>
9618e2ff 6#include <linux/u64_stats_sync.h>
5b9ea6e0 7#include <linux/list.h>
1da177e4 8
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9/* if this changes, algorithm will have to be reworked because this
10 * depends on completely exhausting the VLAN identifier space. Thus
11 * it gives constant time look-up, but in many cases it wastes memory.
12 */
13#define VLAN_GROUP_ARRAY_SPLIT_PARTS 8
14#define VLAN_GROUP_ARRAY_PART_LEN (VLAN_N_VID/VLAN_GROUP_ARRAY_SPLIT_PARTS)
15
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16enum vlan_protos {
17 VLAN_PROTO_8021Q = 0,
8ad227ff 18 VLAN_PROTO_8021AD,
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19 VLAN_PROTO_NUM,
20};
21
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22struct vlan_group {
23 unsigned int nr_vlan_devs;
24 struct hlist_node hlist; /* linked list */
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25 struct net_device **vlan_devices_arrays[VLAN_PROTO_NUM]
26 [VLAN_GROUP_ARRAY_SPLIT_PARTS];
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27};
28
29struct vlan_info {
30 struct net_device *real_dev; /* The ethernet(like) device
31 * the vlan is attached to.
32 */
33 struct vlan_group grp;
34 struct list_head vid_list;
35 unsigned int nr_vids;
36 struct rcu_head rcu;
37};
38
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39static inline unsigned int vlan_proto_idx(__be16 proto)
40{
41 switch (proto) {
f0e78826 42 case htons(ETH_P_8021Q):
1fd9b1fc 43 return VLAN_PROTO_8021Q;
f0e78826 44 case htons(ETH_P_8021AD):
8ad227ff 45 return VLAN_PROTO_8021AD;
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46 default:
47 BUG();
8da63a65 48 return 0;
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49 }
50}
51
52static inline struct net_device *__vlan_group_get_device(struct vlan_group *vg,
53 unsigned int pidx,
54 u16 vlan_id)
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55{
56 struct net_device **array;
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57
58 array = vg->vlan_devices_arrays[pidx]
59 [vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
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60 return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
61}
62
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63static inline struct net_device *vlan_group_get_device(struct vlan_group *vg,
64 __be16 vlan_proto,
65 u16 vlan_id)
66{
67 return __vlan_group_get_device(vg, vlan_proto_idx(vlan_proto), vlan_id);
68}
69
536d1d4a 70static inline void vlan_group_set_device(struct vlan_group *vg,
1fd9b1fc 71 __be16 vlan_proto, u16 vlan_id,
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72 struct net_device *dev)
73{
74 struct net_device **array;
75 if (!vg)
76 return;
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77 array = vg->vlan_devices_arrays[vlan_proto_idx(vlan_proto)]
78 [vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
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79 array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
80}
81
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82/* Must be invoked with rcu_read_lock or with RTNL. */
83static inline struct net_device *vlan_find_dev(struct net_device *real_dev,
1fd9b1fc 84 __be16 vlan_proto, u16 vlan_id)
69ecca86 85{
5b9ea6e0 86 struct vlan_info *vlan_info = rcu_dereference_rtnl(real_dev->vlan_info);
69ecca86 87
5b9ea6e0 88 if (vlan_info)
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89 return vlan_group_get_device(&vlan_info->grp,
90 vlan_proto, vlan_id);
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91
92 return NULL;
93}
94
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95#define vlan_group_for_each_dev(grp, i, dev) \
96 for ((i) = 0; i < VLAN_PROTO_NUM * VLAN_N_VID; i++) \
97 if (((dev) = __vlan_group_get_device((grp), (i) / VLAN_N_VID, \
98 (i) % VLAN_N_VID)))
99
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100int vlan_filter_push_vids(struct vlan_info *vlan_info, __be16 proto);
101void vlan_filter_drop_vids(struct vlan_info *vlan_info, __be16 proto);
102
1da177e4 103/* found in vlan_dev.c */
c17d8874 104void vlan_dev_set_ingress_priority(const struct net_device *dev,
9bb8582e 105 u32 skb_prio, u16 vlan_prio);
c17d8874 106int vlan_dev_set_egress_priority(const struct net_device *dev,
9bb8582e 107 u32 skb_prio, u16 vlan_prio);
b3ce0325 108int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
c17d8874 109void vlan_dev_get_realdev_name(const struct net_device *dev, char *result);
1da177e4 110
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111int vlan_check_real_dev(struct net_device *real_dev,
112 __be16 protocol, u16 vlan_id);
07b5b17e 113void vlan_setup(struct net_device *dev);
42ab19ee 114int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack);
23289a37 115void unregister_vlan_dev(struct net_device *dev, struct list_head *head);
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116bool vlan_dev_inherit_address(struct net_device *dev,
117 struct net_device *real_dev);
07b5b17e 118
7750f403 119static inline u32 vlan_get_ingress_priority(struct net_device *dev,
9bb8582e 120 u16 vlan_tci)
7750f403 121{
7da82c06 122 struct vlan_dev_priv *vip = vlan_dev_priv(dev);
7750f403 123
05423b24 124 return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7];
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125}
126
70c03b49 127#ifdef CONFIG_VLAN_8021Q_GVRP
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128int vlan_gvrp_request_join(const struct net_device *dev);
129void vlan_gvrp_request_leave(const struct net_device *dev);
130int vlan_gvrp_init_applicant(struct net_device *dev);
131void vlan_gvrp_uninit_applicant(struct net_device *dev);
132int vlan_gvrp_init(void);
133void vlan_gvrp_uninit(void);
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134#else
135static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; }
136static inline void vlan_gvrp_request_leave(const struct net_device *dev) {}
137static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; }
138static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {}
139static inline int vlan_gvrp_init(void) { return 0; }
140static inline void vlan_gvrp_uninit(void) {}
141#endif
142
86fbe9bb 143#ifdef CONFIG_VLAN_8021Q_MVRP
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144int vlan_mvrp_request_join(const struct net_device *dev);
145void vlan_mvrp_request_leave(const struct net_device *dev);
146int vlan_mvrp_init_applicant(struct net_device *dev);
147void vlan_mvrp_uninit_applicant(struct net_device *dev);
148int vlan_mvrp_init(void);
149void vlan_mvrp_uninit(void);
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150#else
151static inline int vlan_mvrp_request_join(const struct net_device *dev) { return 0; }
152static inline void vlan_mvrp_request_leave(const struct net_device *dev) {}
153static inline int vlan_mvrp_init_applicant(struct net_device *dev) { return 0; }
154static inline void vlan_mvrp_uninit_applicant(struct net_device *dev) {}
155static inline int vlan_mvrp_init(void) { return 0; }
156static inline void vlan_mvrp_uninit(void) {}
157#endif
158
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159extern const char vlan_fullname[];
160extern const char vlan_version[];
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161int vlan_netlink_init(void);
162void vlan_netlink_fini(void);
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163
164extern struct rtnl_link_ops vlan_link_ops;
165
c7d03a00 166extern unsigned int vlan_net_id;
d9ed0f0e 167
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168struct proc_dir_entry;
169
d9ed0f0e 170struct vlan_net {
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171 /* /proc/net/vlan */
172 struct proc_dir_entry *proc_vlan_dir;
173 /* /proc/net/vlan/config */
174 struct proc_dir_entry *proc_vlan_conf;
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175 /* Determines interface naming scheme. */
176 unsigned short name_type;
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177};
178
1da177e4 179#endif /* !(__BEN_VLAN_802_1Q_INC__) */