1 #ifndef __BEN_VLAN_802_1Q_INC__ 2 #define __BEN_VLAN_802_1Q_INC__ 3 4 #include <linux/if_vlan.h> 5 #include <linux/u64_stats_sync.h> 6 #include <linux/list.h> 7 8 /* if this changes, algorithm will have to be reworked because this 9 * depends on completely exhausting the VLAN identifier space. Thus 10 * it gives constant time look-up, but in many cases it wastes memory. 11 */ 12 #define VLAN_GROUP_ARRAY_SPLIT_PARTS 8 13 #define VLAN_GROUP_ARRAY_PART_LEN (VLAN_N_VID/VLAN_GROUP_ARRAY_SPLIT_PARTS) 14 15 enum vlan_protos { 16 VLAN_PROTO_8021Q = 0, 17 VLAN_PROTO_8021AD, 18 VLAN_PROTO_NUM, 19 }; 20 21 struct vlan_group { 22 unsigned int nr_vlan_devs; 23 struct hlist_node hlist; /* linked list */ 24 struct net_device **vlan_devices_arrays[VLAN_PROTO_NUM] 25 [VLAN_GROUP_ARRAY_SPLIT_PARTS]; 26 }; 27 28 struct vlan_info { 29 struct net_device *real_dev; /* The ethernet(like) device 30 * the vlan is attached to. 31 */ 32 struct vlan_group grp; 33 struct list_head vid_list; 34 unsigned int nr_vids; 35 struct rcu_head rcu; 36 }; 37 38 static inline unsigned int vlan_proto_idx(__be16 proto) 39 { 40 switch (proto) { 41 case htons(ETH_P_8021Q): 42 return VLAN_PROTO_8021Q; 43 case htons(ETH_P_8021AD): 44 return VLAN_PROTO_8021AD; 45 default: 46 BUG(); 47 return 0; 48 } 49 } 50 51 static inline struct net_device *__vlan_group_get_device(struct vlan_group *vg, 52 unsigned int pidx, 53 u16 vlan_id) 54 { 55 struct net_device **array; 56 57 array = vg->vlan_devices_arrays[pidx] 58 [vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; 59 return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL; 60 } 61 62 static inline struct net_device *vlan_group_get_device(struct vlan_group *vg, 63 __be16 vlan_proto, 64 u16 vlan_id) 65 { 66 return __vlan_group_get_device(vg, vlan_proto_idx(vlan_proto), vlan_id); 67 } 68 69 static inline void vlan_group_set_device(struct vlan_group *vg, 70 __be16 vlan_proto, u16 vlan_id, 71 struct net_device *dev) 72 { 73 struct net_device **array; 74 if (!vg) 75 return; 76 array = vg->vlan_devices_arrays[vlan_proto_idx(vlan_proto)] 77 [vlan_id / VLAN_GROUP_ARRAY_PART_LEN]; 78 array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev; 79 } 80 81 /* Must be invoked with rcu_read_lock or with RTNL. */ 82 static inline struct net_device *vlan_find_dev(struct net_device *real_dev, 83 __be16 vlan_proto, u16 vlan_id) 84 { 85 struct vlan_info *vlan_info = rcu_dereference_rtnl(real_dev->vlan_info); 86 87 if (vlan_info) 88 return vlan_group_get_device(&vlan_info->grp, 89 vlan_proto, vlan_id); 90 91 return NULL; 92 } 93 94 #define vlan_group_for_each_dev(grp, i, dev) \ 95 for ((i) = 0; i < VLAN_PROTO_NUM * VLAN_N_VID; i++) \ 96 if (((dev) = __vlan_group_get_device((grp), (i) / VLAN_N_VID, \ 97 (i) % VLAN_N_VID))) 98 99 /* found in vlan_dev.c */ 100 void vlan_dev_set_ingress_priority(const struct net_device *dev, 101 u32 skb_prio, u16 vlan_prio); 102 int vlan_dev_set_egress_priority(const struct net_device *dev, 103 u32 skb_prio, u16 vlan_prio); 104 int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask); 105 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result); 106 107 int vlan_check_real_dev(struct net_device *real_dev, 108 __be16 protocol, u16 vlan_id); 109 void vlan_setup(struct net_device *dev); 110 int register_vlan_dev(struct net_device *dev); 111 void unregister_vlan_dev(struct net_device *dev, struct list_head *head); 112 bool vlan_dev_inherit_address(struct net_device *dev, 113 struct net_device *real_dev); 114 115 static inline u32 vlan_get_ingress_priority(struct net_device *dev, 116 u16 vlan_tci) 117 { 118 struct vlan_dev_priv *vip = vlan_dev_priv(dev); 119 120 return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7]; 121 } 122 123 #ifdef CONFIG_VLAN_8021Q_GVRP 124 int vlan_gvrp_request_join(const struct net_device *dev); 125 void vlan_gvrp_request_leave(const struct net_device *dev); 126 int vlan_gvrp_init_applicant(struct net_device *dev); 127 void vlan_gvrp_uninit_applicant(struct net_device *dev); 128 int vlan_gvrp_init(void); 129 void vlan_gvrp_uninit(void); 130 #else 131 static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; } 132 static inline void vlan_gvrp_request_leave(const struct net_device *dev) {} 133 static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; } 134 static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {} 135 static inline int vlan_gvrp_init(void) { return 0; } 136 static inline void vlan_gvrp_uninit(void) {} 137 #endif 138 139 #ifdef CONFIG_VLAN_8021Q_MVRP 140 int vlan_mvrp_request_join(const struct net_device *dev); 141 void vlan_mvrp_request_leave(const struct net_device *dev); 142 int vlan_mvrp_init_applicant(struct net_device *dev); 143 void vlan_mvrp_uninit_applicant(struct net_device *dev); 144 int vlan_mvrp_init(void); 145 void vlan_mvrp_uninit(void); 146 #else 147 static inline int vlan_mvrp_request_join(const struct net_device *dev) { return 0; } 148 static inline void vlan_mvrp_request_leave(const struct net_device *dev) {} 149 static inline int vlan_mvrp_init_applicant(struct net_device *dev) { return 0; } 150 static inline void vlan_mvrp_uninit_applicant(struct net_device *dev) {} 151 static inline int vlan_mvrp_init(void) { return 0; } 152 static inline void vlan_mvrp_uninit(void) {} 153 #endif 154 155 extern const char vlan_fullname[]; 156 extern const char vlan_version[]; 157 int vlan_netlink_init(void); 158 void vlan_netlink_fini(void); 159 160 extern struct rtnl_link_ops vlan_link_ops; 161 162 extern unsigned int vlan_net_id; 163 164 struct proc_dir_entry; 165 166 struct vlan_net { 167 /* /proc/net/vlan */ 168 struct proc_dir_entry *proc_vlan_dir; 169 /* /proc/net/vlan/config */ 170 struct proc_dir_entry *proc_vlan_conf; 171 /* Determines interface naming scheme. */ 172 unsigned short name_type; 173 }; 174 175 #endif /* !(__BEN_VLAN_802_1Q_INC__) */ 176