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 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 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 return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL; 61 } 62 63 static 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 70 static 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. */ 83 static 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 95 static 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))) 111 112 int vlan_filter_push_vids(struct vlan_info *vlan_info, __be16 proto); 113 void vlan_filter_drop_vids(struct vlan_info *vlan_info, __be16 proto); 114 115 /* found in vlan_dev.c */ 116 void vlan_dev_set_ingress_priority(const struct net_device *dev, 117 u32 skb_prio, u16 vlan_prio); 118 int vlan_dev_set_egress_priority(const struct net_device *dev, 119 u32 skb_prio, u16 vlan_prio); 120 int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask); 121 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result); 122 123 int vlan_check_real_dev(struct net_device *real_dev, 124 __be16 protocol, u16 vlan_id, 125 struct netlink_ext_ack *extack); 126 void vlan_setup(struct net_device *dev); 127 int register_vlan_dev(struct net_device *dev, struct netlink_ext_ack *extack); 128 void unregister_vlan_dev(struct net_device *dev, struct list_head *head); 129 void vlan_dev_uninit(struct net_device *dev); 130 bool vlan_dev_inherit_address(struct net_device *dev, 131 struct net_device *real_dev); 132 133 static inline u32 vlan_get_ingress_priority(struct net_device *dev, 134 u16 vlan_tci) 135 { 136 struct vlan_dev_priv *vip = vlan_dev_priv(dev); 137 138 return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7]; 139 } 140 141 #ifdef CONFIG_VLAN_8021Q_GVRP 142 int vlan_gvrp_request_join(const struct net_device *dev); 143 void vlan_gvrp_request_leave(const struct net_device *dev); 144 int vlan_gvrp_init_applicant(struct net_device *dev); 145 void vlan_gvrp_uninit_applicant(struct net_device *dev); 146 int vlan_gvrp_init(void); 147 void vlan_gvrp_uninit(void); 148 #else 149 static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; } 150 static inline void vlan_gvrp_request_leave(const struct net_device *dev) {} 151 static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; } 152 static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {} 153 static inline int vlan_gvrp_init(void) { return 0; } 154 static inline void vlan_gvrp_uninit(void) {} 155 #endif 156 157 #ifdef CONFIG_VLAN_8021Q_MVRP 158 int vlan_mvrp_request_join(const struct net_device *dev); 159 void vlan_mvrp_request_leave(const struct net_device *dev); 160 int vlan_mvrp_init_applicant(struct net_device *dev); 161 void vlan_mvrp_uninit_applicant(struct net_device *dev); 162 int vlan_mvrp_init(void); 163 void vlan_mvrp_uninit(void); 164 #else 165 static inline int vlan_mvrp_request_join(const struct net_device *dev) { return 0; } 166 static inline void vlan_mvrp_request_leave(const struct net_device *dev) {} 167 static inline int vlan_mvrp_init_applicant(struct net_device *dev) { return 0; } 168 static inline void vlan_mvrp_uninit_applicant(struct net_device *dev) {} 169 static inline int vlan_mvrp_init(void) { return 0; } 170 static inline void vlan_mvrp_uninit(void) {} 171 #endif 172 173 extern const char vlan_fullname[]; 174 extern const char vlan_version[]; 175 int vlan_netlink_init(void); 176 void vlan_netlink_fini(void); 177 178 extern struct rtnl_link_ops vlan_link_ops; 179 180 extern unsigned int vlan_net_id; 181 182 struct proc_dir_entry; 183 184 struct vlan_net { 185 /* /proc/net/vlan */ 186 struct proc_dir_entry *proc_vlan_dir; 187 /* /proc/net/vlan/config */ 188 struct proc_dir_entry *proc_vlan_conf; 189 /* Determines interface naming scheme. */ 190 unsigned short name_type; 191 }; 192 193 #endif /* !(__BEN_VLAN_802_1Q_INC__) */ 194