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
   7
   8 /**
   9  *      struct vlan_priority_tci_mapping - vlan egress priority mappings
  10  *      @priority: skb priority
  11  *      @vlan_qos: vlan priority: (skb->priority << 13) & 0xE000
  12  *      @next: pointer to next struct
  13  */
  14 struct vlan_priority_tci_mapping {
  15         u32                                     priority;
  16         u16                                     vlan_qos;
  17         struct vlan_priority_tci_mapping        *next;
  18 };
  19
  20
  21 /**
  22  *      struct vlan_rx_stats - VLAN percpu rx stats
  23  *      @rx_packets: number of received packets
  24  *      @rx_bytes: number of received bytes
  25  *      @rx_multicast: number of received multicast packets
  26  *      @syncp: synchronization point for 64bit counters
  27  *      @rx_errors: number of errors
  28  */
  29 struct vlan_rx_stats {
  30         u64                     rx_packets;
  31         u64                     rx_bytes;
  32         u64                     rx_multicast;
  33         struct u64_stats_sync   syncp;
  34         unsigned long           rx_errors;
  35 };
  36
  37 /**
  38  *      struct vlan_dev_info - VLAN private device data
  39  *      @nr_ingress_mappings: number of ingress priority mappings
  40  *      @ingress_priority_map: ingress priority mappings
  41  *      @nr_egress_mappings: number of egress priority mappings
  42  *      @egress_priority_map: hash of egress priority mappings
  43  *      @vlan_id: VLAN identifier
  44  *      @flags: device flags
  45  *      @real_dev: underlying netdevice
  46  *      @real_dev_addr: address of underlying netdevice
  47  *      @dent: proc dir entry
  48  *      @cnt_inc_headroom_on_tx: statistic - number of skb expansions on TX
  49  *      @cnt_encap_on_xmit: statistic - number of skb encapsulations on TX
  50  *      @vlan_rx_stats: ptr to percpu rx stats
  51  */
  52 struct vlan_dev_info {
  53         unsigned int                            nr_ingress_mappings;
  54         u32                                     ingress_priority_map[8];
  55         unsigned int                            nr_egress_mappings;
  56         struct vlan_priority_tci_mapping        *egress_priority_map[16];
  57
  58         u16                                     vlan_id;
  59         u16                                     flags;
  60
  61         struct net_device                       *real_dev;
  62         unsigned char                           real_dev_addr[ETH_ALEN];
  63
  64         struct proc_dir_entry                   *dent;
  65         unsigned long                           cnt_inc_headroom_on_tx;
  66         unsigned long                           cnt_encap_on_xmit;
  67         struct vlan_rx_stats __percpu           *vlan_rx_stats;
  68 };
  69
  70 static inline struct vlan_dev_info *vlan_dev_info(const struct net_device *dev)
  71 {
  72         return netdev_priv(dev);
  73 }
  74
  75 #define VLAN_GRP_HASH_SHIFT     5
  76 #define VLAN_GRP_HASH_SIZE      (1 << VLAN_GRP_HASH_SHIFT)
  77 #define VLAN_GRP_HASH_MASK      (VLAN_GRP_HASH_SIZE - 1)
  78
  79 /*  Find a VLAN device by the MAC address of its Ethernet device, and
  80  *  it's VLAN ID.  The default configuration is to have VLAN's scope
  81  *  to be box-wide, so the MAC will be ignored.  The mac will only be
  82  *  looked at if we are configured to have a separate set of VLANs per
  83  *  each MAC addressable interface.  Note that this latter option does
  84  *  NOT follow the spec for VLANs, but may be useful for doing very
  85  *  large quantities of VLAN MUX/DEMUX onto FrameRelay or ATM PVCs.
  86  *
  87  *  Must be invoked with rcu_read_lock (ie preempt disabled)
  88  *  or with RTNL.
  89  */
  90 struct net_device *__find_vlan_dev(struct net_device *real_dev, u16 vlan_id);
  91
  92 /* found in vlan_dev.c */
  93 int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev,
  94                   struct packet_type *ptype, struct net_device *orig_dev);
  95 void vlan_dev_set_ingress_priority(const struct net_device *dev,
  96                                    u32 skb_prio, u16 vlan_prio);
  97 int vlan_dev_set_egress_priority(const struct net_device *dev,
  98                                  u32 skb_prio, u16 vlan_prio);
  99 int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
 100 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result);
 101
 102 int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id);
 103 void vlan_setup(struct net_device *dev);
 104 int register_vlan_dev(struct net_device *dev);
 105 void unregister_vlan_dev(struct net_device *dev, struct list_head *head);
 106
 107 static inline u32 vlan_get_ingress_priority(struct net_device *dev,
 108                                             u16 vlan_tci)
 109 {
 110         struct vlan_dev_info *vip = vlan_dev_info(dev);
 111
 112         return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7];
 113 }
 114
 115 #ifdef CONFIG_VLAN_8021Q_GVRP
 116 extern int vlan_gvrp_request_join(const struct net_device *dev);
 117 extern void vlan_gvrp_request_leave(const struct net_device *dev);
 118 extern int vlan_gvrp_init_applicant(struct net_device *dev);
 119 extern void vlan_gvrp_uninit_applicant(struct net_device *dev);
 120 extern int vlan_gvrp_init(void);
 121 extern void vlan_gvrp_uninit(void);
 122 #else
 123 static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; }
 124 static inline void vlan_gvrp_request_leave(const struct net_device *dev) {}
 125 static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; }
 126 static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {}
 127 static inline int vlan_gvrp_init(void) { return 0; }
 128 static inline void vlan_gvrp_uninit(void) {}
 129 #endif
 130
 131 extern const char vlan_fullname[];
 132 extern const char vlan_version[];
 133 extern int vlan_netlink_init(void);
 134 extern void vlan_netlink_fini(void);
 135
 136 extern struct rtnl_link_ops vlan_link_ops;
 137
 138 static inline int is_vlan_dev(struct net_device *dev)
 139 {
 140         return dev->priv_flags & IFF_802_1Q_VLAN;
 141 }
 142
 143 extern int vlan_net_id;
 144
 145 struct proc_dir_entry;
 146
 147 struct vlan_net {
 148         /* /proc/net/vlan */
 149         struct proc_dir_entry *proc_vlan_dir;
 150         /* /proc/net/vlan/config */
 151         struct proc_dir_entry *proc_vlan_conf;
 152         /* Determines interface naming scheme. */
 153         unsigned short name_type;
 154 };
 155
 156 #endif /* !(__BEN_VLAN_802_1Q_INC__) */