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