1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __BEN_VLAN_802_1Q_INC__
3 #define __BEN_VLAN_802_1Q_INC__
5 #include <linux/if_vlan.h>
6 #include <linux/u64_stats_sync.h>
7 #include <linux/list.h>
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.
13 #define VLAN_GROUP_ARRAY_SPLIT_PARTS 8
14 #define VLAN_GROUP_ARRAY_PART_LEN (VLAN_N_VID/VLAN_GROUP_ARRAY_SPLIT_PARTS)
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];
30 struct net_device *real_dev; /* The ethernet(like) device
31 * the vlan is attached to.
33 struct vlan_group grp;
34 struct list_head vid_list;
39 static inline int vlan_proto_idx(__be16 proto)
42 case htons(ETH_P_8021Q):
43 return VLAN_PROTO_8021Q;
44 case htons(ETH_P_8021AD):
45 return VLAN_PROTO_8021AD;
47 WARN(1, "invalid VLAN protocol: 0x%04x\n", ntohs(proto));
52 static inline struct net_device *__vlan_group_get_device(struct vlan_group *vg,
56 struct net_device **array;
58 array = vg->vlan_devices_arrays[pidx]
59 [vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
61 /* paired with smp_wmb() in vlan_group_prealloc_vid() */
64 return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
67 static inline struct net_device *vlan_group_get_device(struct vlan_group *vg,
71 int pidx = vlan_proto_idx(vlan_proto);
76 return __vlan_group_get_device(vg, pidx, vlan_id);
79 static inline void vlan_group_set_device(struct vlan_group *vg,
80 __be16 vlan_proto, u16 vlan_id,
81 struct net_device *dev)
83 int pidx = vlan_proto_idx(vlan_proto);
84 struct net_device **array;
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;
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)
97 struct vlan_info *vlan_info = rcu_dereference_rtnl(real_dev->vlan_info);
100 return vlan_group_get_device(&vlan_info->grp,
101 vlan_proto, vlan_id);
106 static inline netdev_features_t vlan_tnl_features(struct net_device *real_dev)
108 netdev_features_t ret;
110 ret = real_dev->hw_enc_features &
111 (NETIF_F_CSUM_MASK | NETIF_F_GSO_SOFTWARE |
112 NETIF_F_GSO_ENCAP_ALL);
114 if ((ret & NETIF_F_GSO_ENCAP_ALL) && (ret & NETIF_F_CSUM_MASK))
115 return (ret & ~NETIF_F_CSUM_MASK) | NETIF_F_HW_CSUM;
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, \
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);
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,
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);
146 static inline u32 vlan_get_ingress_priority(struct net_device *dev,
149 struct vlan_dev_priv *vip = vlan_dev_priv(dev);
151 return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7];
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);
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) {}
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);
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) {}
186 extern const char vlan_fullname[];
187 extern const char vlan_version[];
188 int vlan_netlink_init(void);
189 void vlan_netlink_fini(void);
191 extern struct rtnl_link_ops vlan_link_ops;
193 extern unsigned int vlan_net_id;
195 struct proc_dir_entry;
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;
206 #endif /* !(__BEN_VLAN_802_1Q_INC__) */