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 | |
16 | enum vlan_protos { |
17 | VLAN_PROTO_8021Q = 0, |
18 | VLAN_PROTO_8021AD, |
19 | VLAN_PROTO_NUM, |
20 | }; |
21 | |
22 | struct 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 | |
29 | struct 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 | |
39 | static inline 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 | WARN(1, "invalid VLAN protocol: 0x%04x\n" , ntohs(proto)); |
48 | return -EINVAL; |
49 | } |
50 | } |
51 | |
52 | static 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 | |
61 | /* paired with smp_wmb() in vlan_group_prealloc_vid() */ |
62 | smp_rmb(); |
63 | |
64 | return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL; |
65 | } |
66 | |
67 | static inline struct net_device *vlan_group_get_device(struct vlan_group *vg, |
68 | __be16 vlan_proto, |
69 | u16 vlan_id) |
70 | { |
71 | int pidx = vlan_proto_idx(proto: vlan_proto); |
72 | |
73 | if (pidx < 0) |
74 | return NULL; |
75 | |
76 | return __vlan_group_get_device(vg, pidx, vlan_id); |
77 | } |
78 | |
79 | static inline void vlan_group_set_device(struct vlan_group *vg, |
80 | __be16 vlan_proto, u16 vlan_id, |
81 | struct net_device *dev) |
82 | { |
83 | int pidx = vlan_proto_idx(proto: vlan_proto); |
84 | struct net_device **array; |
85 | |
86 | if (!vg || pidx < 0) |
87 | return; |
88 | array = vg->vlan_devices_arrays[pidx] |
89 | [vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; |
90 | array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev; |
91 | } |
92 | |
93 | /* Must be invoked with rcu_read_lock or with RTNL. */ |
94 | static inline struct net_device *vlan_find_dev(struct net_device *real_dev, |
95 | __be16 vlan_proto, u16 vlan_id) |
96 | { |
97 | struct vlan_info *vlan_info = rcu_dereference_rtnl(real_dev->vlan_info); |
98 | |
99 | if (vlan_info) |
100 | return vlan_group_get_device(vg: &vlan_info->grp, |
101 | vlan_proto, vlan_id); |
102 | |
103 | return NULL; |
104 | } |
105 | |
106 | static inline netdev_features_t vlan_tnl_features(struct net_device *real_dev) |
107 | { |
108 | netdev_features_t ret; |
109 | |
110 | ret = real_dev->hw_enc_features & |
111 | (NETIF_F_CSUM_MASK | NETIF_F_GSO_SOFTWARE | |
112 | NETIF_F_GSO_ENCAP_ALL); |
113 | |
114 | if ((ret & NETIF_F_GSO_ENCAP_ALL) && (ret & NETIF_F_CSUM_MASK)) |
115 | return (ret & ~NETIF_F_CSUM_MASK) | NETIF_F_HW_CSUM; |
116 | return 0; |
117 | } |
118 | |
119 | #define vlan_group_for_each_dev(grp, i, dev) \ |
120 | for ((i) = 0; i < VLAN_PROTO_NUM * VLAN_N_VID; i++) \ |
121 | if (((dev) = __vlan_group_get_device((grp), (i) / VLAN_N_VID, \ |
122 | (i) % VLAN_N_VID))) |
123 | |
124 | int vlan_filter_push_vids(struct vlan_info *vlan_info, __be16 proto); |
125 | void vlan_filter_drop_vids(struct vlan_info *vlan_info, __be16 proto); |
126 | |
127 | /* found in vlan_dev.c */ |
128 | void vlan_dev_set_ingress_priority(const struct net_device *dev, |
129 | u32 skb_prio, u16 vlan_prio); |
130 | int vlan_dev_set_egress_priority(const struct net_device *dev, |
131 | u32 skb_prio, u16 vlan_prio); |
132 | void vlan_dev_free_egress_priority(const struct net_device *dev); |
133 | int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask); |
134 | void vlan_dev_get_realdev_name(const struct net_device *dev, char *result, |
135 | size_t size); |
136 | |
137 | int vlan_check_real_dev(struct net_device *real_dev, |
138 | __be16 protocol, u16 vlan_id, |
139 | struct netlink_ext_ack *extack); |
140 | void vlan_setup(struct net_device *dev); |
141 | int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack); |
142 | void unregister_vlan_dev(struct net_device *dev, struct list_head *head); |
143 | bool vlan_dev_inherit_address(struct net_device *dev, |
144 | struct net_device *real_dev); |
145 | |
146 | static inline u32 vlan_get_ingress_priority(struct net_device *dev, |
147 | u16 vlan_tci) |
148 | { |
149 | struct vlan_dev_priv *vip = vlan_dev_priv(dev); |
150 | |
151 | return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7]; |
152 | } |
153 | |
154 | #ifdef CONFIG_VLAN_8021Q_GVRP |
155 | int vlan_gvrp_request_join(const struct net_device *dev); |
156 | void vlan_gvrp_request_leave(const struct net_device *dev); |
157 | int vlan_gvrp_init_applicant(struct net_device *dev); |
158 | void vlan_gvrp_uninit_applicant(struct net_device *dev); |
159 | int vlan_gvrp_init(void); |
160 | void vlan_gvrp_uninit(void); |
161 | #else |
162 | static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; } |
163 | static inline void vlan_gvrp_request_leave(const struct net_device *dev) {} |
164 | static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; } |
165 | static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {} |
166 | static inline int vlan_gvrp_init(void) { return 0; } |
167 | static inline void vlan_gvrp_uninit(void) {} |
168 | #endif |
169 | |
170 | #ifdef CONFIG_VLAN_8021Q_MVRP |
171 | int vlan_mvrp_request_join(const struct net_device *dev); |
172 | void vlan_mvrp_request_leave(const struct net_device *dev); |
173 | int vlan_mvrp_init_applicant(struct net_device *dev); |
174 | void vlan_mvrp_uninit_applicant(struct net_device *dev); |
175 | int vlan_mvrp_init(void); |
176 | void vlan_mvrp_uninit(void); |
177 | #else |
178 | static inline int vlan_mvrp_request_join(const struct net_device *dev) { return 0; } |
179 | static inline void vlan_mvrp_request_leave(const struct net_device *dev) {} |
180 | static inline int vlan_mvrp_init_applicant(struct net_device *dev) { return 0; } |
181 | static inline void vlan_mvrp_uninit_applicant(struct net_device *dev) {} |
182 | static inline int vlan_mvrp_init(void) { return 0; } |
183 | static inline void vlan_mvrp_uninit(void) {} |
184 | #endif |
185 | |
186 | extern const char vlan_fullname[]; |
187 | extern const char vlan_version[]; |
188 | int vlan_netlink_init(void); |
189 | void vlan_netlink_fini(void); |
190 | |
191 | extern struct rtnl_link_ops vlan_link_ops; |
192 | |
193 | extern unsigned int vlan_net_id; |
194 | |
195 | struct proc_dir_entry; |
196 | |
197 | struct vlan_net { |
198 | /* /proc/net/vlan */ |
199 | struct proc_dir_entry *proc_vlan_dir; |
200 | /* /proc/net/vlan/config */ |
201 | struct proc_dir_entry *proc_vlan_conf; |
202 | /* Determines interface naming scheme. */ |
203 | unsigned short name_type; |
204 | }; |
205 | |
206 | #endif /* !(__BEN_VLAN_802_1Q_INC__) */ |
207 | |