net/8021q/vlan.h

   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
   9 /**
  10  *      struct vlan_priority_tci_mapping - vlan egress priority mappings
  11  *      @priority: skb priority
  12  *      @vlan_qos: vlan priority: (skb->priority << 13) & 0xE000
  13  *      @next: pointer to next struct
  14  */
  15 struct vlan_priority_tci_mapping {
  16         u32                                     priority;
  17         u16                                     vlan_qos;
  18         struct vlan_priority_tci_mapping        *next;
  19 };
  20
  21
  22 /**
  23  *      struct vlan_pcpu_stats - VLAN percpu rx/tx stats
  24  *      @rx_packets: number of received packets
  25  *      @rx_bytes: number of received bytes
  26  *      @rx_multicast: number of received multicast packets
  27  *      @tx_packets: number of transmitted packets
  28  *      @tx_bytes: number of transmitted bytes
  29  *      @syncp: synchronization point for 64bit counters
  30  *      @rx_errors: number of rx errors
  31  *      @tx_dropped: number of tx drops
  32  */
  33 struct vlan_pcpu_stats {
  34         u64                     rx_packets;
  35         u64                     rx_bytes;
  36         u64                     rx_multicast;
  37         u64                     tx_packets;
  38         u64                     tx_bytes;
  39         struct u64_stats_sync   syncp;
  40         u32                     rx_errors;
  41         u32                     tx_dropped;
  42 };
  43
  44 struct netpoll;
  45
  46 /**
  47  *      struct vlan_dev_priv - VLAN private device data
  48  *      @nr_ingress_mappings: number of ingress priority mappings
  49  *      @ingress_priority_map: ingress priority mappings
  50  *      @nr_egress_mappings: number of egress priority mappings
  51  *      @egress_priority_map: hash of egress priority mappings
  52  *      @vlan_id: VLAN identifier
  53  *      @flags: device flags
  54  *      @real_dev: underlying netdevice
  55  *      @real_dev_addr: address of underlying netdevice
  56  *      @dent: proc dir entry
  57  *      @vlan_pcpu_stats: ptr to percpu rx stats
  58  */
  59 struct vlan_dev_priv {
  60         unsigned int                            nr_ingress_mappings;
  61         u32                                     ingress_priority_map[8];
  62         unsigned int                            nr_egress_mappings;
  63         struct vlan_priority_tci_mapping        *egress_priority_map[16];
  64
  65         u16                                     vlan_id;
  66         u16                                     flags;
  67
  68         struct net_device                       *real_dev;
  69         unsigned char                           real_dev_addr[ETH_ALEN];
  70
  71         struct proc_dir_entry                   *dent;
  72         struct vlan_pcpu_stats __percpu         *vlan_pcpu_stats;
  73 #ifdef CONFIG_NET_POLL_CONTROLLER
  74         struct netpoll                          *netpoll;
  75 #endif
  76 };
  77
  78 static inline struct vlan_dev_priv *vlan_dev_priv(const struct net_device *dev)
  79 {
  80         return netdev_priv(dev);
  81 }
  82
  83 /* if this changes, algorithm will have to be reworked because this
  84  * depends on completely exhausting the VLAN identifier space.  Thus
  85  * it gives constant time look-up, but in many cases it wastes memory.
  86  */
  87 #define VLAN_GROUP_ARRAY_SPLIT_PARTS  8
  88 #define VLAN_GROUP_ARRAY_PART_LEN     (VLAN_N_VID/VLAN_GROUP_ARRAY_SPLIT_PARTS)
  89
  90 struct vlan_group {
  91         unsigned int            nr_vlan_devs;
  92         struct hlist_node       hlist;  /* linked list */
  93         struct net_device **vlan_devices_arrays[VLAN_GROUP_ARRAY_SPLIT_PARTS];
  94 };
  95
  96 struct vlan_info {
  97         struct net_device       *real_dev; /* The ethernet(like) device
  98                                             * the vlan is attached to.
  99                                             */
 100         struct vlan_group       grp;
 101         struct list_head        vid_list;
 102         unsigned int            nr_vids;
 103         struct rcu_head         rcu;
 104 };
 105
 106 static inline struct net_device *vlan_group_get_device(struct vlan_group *vg,
 107                                                        u16 vlan_id)
 108 {
 109         struct net_device **array;
 110         array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
 111         return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
 112 }
 113
 114 static inline void vlan_group_set_device(struct vlan_group *vg,
 115                                          u16 vlan_id,
 116                                          struct net_device *dev)
 117 {
 118         struct net_device **array;
 119         if (!vg)
 120                 return;
 121         array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
 122         array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
 123 }
 124
 125 /* Must be invoked with rcu_read_lock or with RTNL. */
 126 static inline struct net_device *vlan_find_dev(struct net_device *real_dev,
 127                                                u16 vlan_id)
 128 {
 129         struct vlan_info *vlan_info = rcu_dereference_rtnl(real_dev->vlan_info);
 130
 131         if (vlan_info)
 132                 return vlan_group_get_device(&vlan_info->grp, vlan_id);
 133
 134         return NULL;
 135 }
 136
 137 /* found in vlan_dev.c */
 138 void vlan_dev_set_ingress_priority(const struct net_device *dev,
 139                                    u32 skb_prio, u16 vlan_prio);
 140 int vlan_dev_set_egress_priority(const struct net_device *dev,
 141                                  u32 skb_prio, u16 vlan_prio);
 142 int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
 143 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result);
 144
 145 int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id);
 146 void vlan_setup(struct net_device *dev);
 147 int register_vlan_dev(struct net_device *dev);
 148 void unregister_vlan_dev(struct net_device *dev, struct list_head *head);
 149
 150 static inline u32 vlan_get_ingress_priority(struct net_device *dev,
 151                                             u16 vlan_tci)
 152 {
 153         struct vlan_dev_priv *vip = vlan_dev_priv(dev);
 154
 155         return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7];
 156 }
 157
 158 #ifdef CONFIG_VLAN_8021Q_GVRP
 159 extern int vlan_gvrp_request_join(const struct net_device *dev);
 160 extern void vlan_gvrp_request_leave(const struct net_device *dev);
 161 extern int vlan_gvrp_init_applicant(struct net_device *dev);
 162 extern void vlan_gvrp_uninit_applicant(struct net_device *dev);
 163 extern int vlan_gvrp_init(void);
 164 extern void vlan_gvrp_uninit(void);
 165 #else
 166 static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; }
 167 static inline void vlan_gvrp_request_leave(const struct net_device *dev) {}
 168 static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; }
 169 static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {}
 170 static inline int vlan_gvrp_init(void) { return 0; }
 171 static inline void vlan_gvrp_uninit(void) {}
 172 #endif
 173
 174 extern const char vlan_fullname[];
 175 extern const char vlan_version[];
 176 extern int vlan_netlink_init(void);
 177 extern void vlan_netlink_fini(void);
 178
 179 extern struct rtnl_link_ops vlan_link_ops;
 180
 181 extern int vlan_net_id;
 182
 183 struct proc_dir_entry;
 184
 185 struct vlan_net {
 186         /* /proc/net/vlan */
 187         struct proc_dir_entry *proc_vlan_dir;
 188         /* /proc/net/vlan/config */
 189         struct proc_dir_entry *proc_vlan_conf;
 190         /* Determines interface naming scheme. */
 191         unsigned short name_type;
 192 };
 193
 194 #endif /* !(__BEN_VLAN_802_1Q_INC__) */