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 15enum vlan_protos { 16 VLAN_PROTO_8021Q = 0, 17 VLAN_PROTO_8021AD, 18 VLAN_PROTO_NUM, 19}; 20 21struct 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 28struct 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 38static 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 51static 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 62static 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 69static 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. */ 82static 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 */ 100void vlan_dev_set_ingress_priority(const struct net_device *dev, 101 u32 skb_prio, u16 vlan_prio); 102int vlan_dev_set_egress_priority(const struct net_device *dev, 103 u32 skb_prio, u16 vlan_prio); 104int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask); 105void vlan_dev_get_realdev_name(const struct net_device *dev, char *result); 106 107int vlan_check_real_dev(struct net_device *real_dev, 108 __be16 protocol, u16 vlan_id); 109void vlan_setup(struct net_device *dev); 110int register_vlan_dev(struct net_device *dev); 111void unregister_vlan_dev(struct net_device *dev, struct list_head *head); 112 113static inline u32 vlan_get_ingress_priority(struct net_device *dev, 114 u16 vlan_tci) 115{ 116 struct vlan_dev_priv *vip = vlan_dev_priv(dev); 117 118 return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7]; 119} 120 121#ifdef CONFIG_VLAN_8021Q_GVRP 122int vlan_gvrp_request_join(const struct net_device *dev); 123void vlan_gvrp_request_leave(const struct net_device *dev); 124int vlan_gvrp_init_applicant(struct net_device *dev); 125void vlan_gvrp_uninit_applicant(struct net_device *dev); 126int vlan_gvrp_init(void); 127void vlan_gvrp_uninit(void); 128#else 129static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; } 130static inline void vlan_gvrp_request_leave(const struct net_device *dev) {} 131static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; } 132static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {} 133static inline int vlan_gvrp_init(void) { return 0; } 134static inline void vlan_gvrp_uninit(void) {} 135#endif 136 137#ifdef CONFIG_VLAN_8021Q_MVRP 138int vlan_mvrp_request_join(const struct net_device *dev); 139void vlan_mvrp_request_leave(const struct net_device *dev); 140int vlan_mvrp_init_applicant(struct net_device *dev); 141void vlan_mvrp_uninit_applicant(struct net_device *dev); 142int vlan_mvrp_init(void); 143void vlan_mvrp_uninit(void); 144#else 145static inline int vlan_mvrp_request_join(const struct net_device *dev) { return 0; } 146static inline void vlan_mvrp_request_leave(const struct net_device *dev) {} 147static inline int vlan_mvrp_init_applicant(struct net_device *dev) { return 0; } 148static inline void vlan_mvrp_uninit_applicant(struct net_device *dev) {} 149static inline int vlan_mvrp_init(void) { return 0; } 150static inline void vlan_mvrp_uninit(void) {} 151#endif 152 153extern const char vlan_fullname[]; 154extern const char vlan_version[]; 155int vlan_netlink_init(void); 156void vlan_netlink_fini(void); 157 158extern struct rtnl_link_ops vlan_link_ops; 159 160extern int vlan_net_id; 161 162struct proc_dir_entry; 163 164struct vlan_net { 165 /* /proc/net/vlan */ 166 struct proc_dir_entry *proc_vlan_dir; 167 /* /proc/net/vlan/config */ 168 struct proc_dir_entry *proc_vlan_conf; 169 /* Determines interface naming scheme. */ 170 unsigned short name_type; 171}; 172 173#endif /* !(__BEN_VLAN_802_1Q_INC__) */ 174