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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __BEN_VLAN_802_1Q_INC__
3#define __BEN_VLAN_802_1Q_INC__
4
5#include <linux/if_vlan.h>
6#include <linux/u64_stats_sync.h>
7#include <linux/list.h>
8
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
16enum vlan_protos {
17 VLAN_PROTO_8021Q = 0,
18 VLAN_PROTO_8021AD,
19 VLAN_PROTO_NUM,
20};
21
22struct vlan_group {
23 unsigned int nr_vlan_devs;
24 struct hlist_node hlist; /* linked list */
25 struct net_device **vlan_devices_arrays[VLAN_PROTO_NUM]
26 [VLAN_GROUP_ARRAY_SPLIT_PARTS];
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
39static inline unsigned int vlan_proto_idx(__be16 proto)
40{
41 switch (proto) {
42 case htons(ETH_P_8021Q):
43 return VLAN_PROTO_8021Q;
44 case htons(ETH_P_8021AD):
45 return VLAN_PROTO_8021AD;
46 default:
47 BUG();
48 return 0;
49 }
50}
51
52static inline struct net_device *__vlan_group_get_device(struct vlan_group *vg,
53 unsigned int pidx,
54 u16 vlan_id)
55{
56 struct net_device **array;
57
58 array = vg->vlan_devices_arrays[pidx]
59 [vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
60 return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
61}
62
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
70static inline void vlan_group_set_device(struct vlan_group *vg,
71 __be16 vlan_proto, u16 vlan_id,
72 struct net_device *dev)
73{
74 struct net_device **array;
75 if (!vg)
76 return;
77 array = vg->vlan_devices_arrays[vlan_proto_idx(vlan_proto)]
78 [vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
79 array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
80}
81
82/* Must be invoked with rcu_read_lock or with RTNL. */
83static inline struct net_device *vlan_find_dev(struct net_device *real_dev,
84 __be16 vlan_proto, u16 vlan_id)
85{
86 struct vlan_info *vlan_info = rcu_dereference_rtnl(real_dev->vlan_info);
87
88 if (vlan_info)
89 return vlan_group_get_device(&vlan_info->grp,
90 vlan_proto, vlan_id);
91
92 return NULL;
93}
94
95static inline netdev_features_t vlan_tnl_features(struct net_device *real_dev)
96{
97 netdev_features_t ret;
98
99 ret = real_dev->hw_enc_features &
100 (NETIF_F_CSUM_MASK | NETIF_F_ALL_TSO | NETIF_F_GSO_ENCAP_ALL);
101
102 if ((ret & NETIF_F_GSO_ENCAP_ALL) && (ret & NETIF_F_CSUM_MASK))
103 return (ret & ~NETIF_F_CSUM_MASK) | NETIF_F_HW_CSUM;
104 return 0;
105}
106
107#define vlan_group_for_each_dev(grp, i, dev) \
108 for ((i) = 0; i < VLAN_PROTO_NUM * VLAN_N_VID; i++) \
109 if (((dev) = __vlan_group_get_device((grp), (i) / VLAN_N_VID, \
110 (i) % VLAN_N_VID)))
111
112int vlan_filter_push_vids(struct vlan_info *vlan_info, __be16 proto);
113void vlan_filter_drop_vids(struct vlan_info *vlan_info, __be16 proto);
114
115/* found in vlan_dev.c */
116void vlan_dev_set_ingress_priority(const struct net_device *dev,
117 u32 skb_prio, u16 vlan_prio);
118int vlan_dev_set_egress_priority(const struct net_device *dev,
119 u32 skb_prio, u16 vlan_prio);
120int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
121void vlan_dev_get_realdev_name(const struct net_device *dev, char *result);
122
123int vlan_check_real_dev(struct net_device *real_dev,
124 __be16 protocol, u16 vlan_id,
125 struct netlink_ext_ack *extack);
126void vlan_setup(struct net_device *dev);
127int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack);
128void unregister_vlan_dev(struct net_device *dev, struct list_head *head);
129bool vlan_dev_inherit_address(struct net_device *dev,
130 struct net_device *real_dev);
131
132static inline u32 vlan_get_ingress_priority(struct net_device *dev,
133 u16 vlan_tci)
134{
135 struct vlan_dev_priv *vip = vlan_dev_priv(dev);
136
137 return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7];
138}
139
140#ifdef CONFIG_VLAN_8021Q_GVRP
141int vlan_gvrp_request_join(const struct net_device *dev);
142void vlan_gvrp_request_leave(const struct net_device *dev);
143int vlan_gvrp_init_applicant(struct net_device *dev);
144void vlan_gvrp_uninit_applicant(struct net_device *dev);
145int vlan_gvrp_init(void);
146void vlan_gvrp_uninit(void);
147#else
148static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; }
149static inline void vlan_gvrp_request_leave(const struct net_device *dev) {}
150static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; }
151static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {}
152static inline int vlan_gvrp_init(void) { return 0; }
153static inline void vlan_gvrp_uninit(void) {}
154#endif
155
156#ifdef CONFIG_VLAN_8021Q_MVRP
157int vlan_mvrp_request_join(const struct net_device *dev);
158void vlan_mvrp_request_leave(const struct net_device *dev);
159int vlan_mvrp_init_applicant(struct net_device *dev);
160void vlan_mvrp_uninit_applicant(struct net_device *dev);
161int vlan_mvrp_init(void);
162void vlan_mvrp_uninit(void);
163#else
164static inline int vlan_mvrp_request_join(const struct net_device *dev) { return 0; }
165static inline void vlan_mvrp_request_leave(const struct net_device *dev) {}
166static inline int vlan_mvrp_init_applicant(struct net_device *dev) { return 0; }
167static inline void vlan_mvrp_uninit_applicant(struct net_device *dev) {}
168static inline int vlan_mvrp_init(void) { return 0; }
169static inline void vlan_mvrp_uninit(void) {}
170#endif
171
172extern const char vlan_fullname[];
173extern const char vlan_version[];
174int vlan_netlink_init(void);
175void vlan_netlink_fini(void);
176
177extern struct rtnl_link_ops vlan_link_ops;
178
179extern unsigned int vlan_net_id;
180
181struct proc_dir_entry;
182
183struct vlan_net {
184 /* /proc/net/vlan */
185 struct proc_dir_entry *proc_vlan_dir;
186 /* /proc/net/vlan/config */
187 struct proc_dir_entry *proc_vlan_conf;
188 /* Determines interface naming scheme. */
189 unsigned short name_type;
190};
191
192#endif /* !(__BEN_VLAN_802_1Q_INC__) */