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
   6
   7 /**
   8  *      struct vlan_priority_tci_mapping - vlan egress priority mappings
   9  *      @priority: skb priority
  10  *      @vlan_qos: vlan priority: (skb->priority << 13) & 0xE000
  11  *      @next: pointer to next struct
  12  */
  13 struct vlan_priority_tci_mapping {
  14         u32                                     priority;
  15         u16                                     vlan_qos;
  16         struct vlan_priority_tci_mapping        *next;
  17 };
  18
  19 /**
  20  *      struct vlan_dev_info - VLAN private device data
  21  *      @nr_ingress_mappings: number of ingress priority mappings
  22  *      @ingress_priority_map: ingress priority mappings
  23  *      @nr_egress_mappings: number of egress priority mappings
  24  *      @egress_priority_map: hash of egress priority mappings
  25  *      @vlan_id: VLAN identifier
  26  *      @flags: device flags
  27  *      @real_dev: underlying netdevice
  28  *      @real_dev_addr: address of underlying netdevice
  29  *      @dent: proc dir entry
  30  *      @cnt_inc_headroom_on_tx: statistic - number of skb expansions on TX
  31  *      @cnt_encap_on_xmit: statistic - number of skb encapsulations on TX
  32  */
  33 struct vlan_dev_info {
  34         unsigned int                            nr_ingress_mappings;
  35         u32                                     ingress_priority_map[8];
  36         unsigned int                            nr_egress_mappings;
  37         struct vlan_priority_tci_mapping        *egress_priority_map[16];
  38
  39         u16                                     vlan_id;
  40         u16                                     flags;
  41
  42         struct net_device                       *real_dev;
  43         unsigned char                           real_dev_addr[ETH_ALEN];
  44
  45         struct proc_dir_entry                   *dent;
  46         unsigned long                           cnt_inc_headroom_on_tx;
  47         unsigned long                           cnt_encap_on_xmit;
  48 };
  49
  50 static inline struct vlan_dev_info *vlan_dev_info(const struct net_device *dev)
  51 {
  52         return netdev_priv(dev);
  53 }
  54
  55 #define VLAN_GRP_HASH_SHIFT     5
  56 #define VLAN_GRP_HASH_SIZE      (1 << VLAN_GRP_HASH_SHIFT)
  57 #define VLAN_GRP_HASH_MASK      (VLAN_GRP_HASH_SIZE - 1)
  58
  59 /*  Find a VLAN device by the MAC address of its Ethernet device, and
  60  *  it's VLAN ID.  The default configuration is to have VLAN's scope
  61  *  to be box-wide, so the MAC will be ignored.  The mac will only be
  62  *  looked at if we are configured to have a separate set of VLANs per
  63  *  each MAC addressable interface.  Note that this latter option does
  64  *  NOT follow the spec for VLANs, but may be useful for doing very
  65  *  large quantities of VLAN MUX/DEMUX onto FrameRelay or ATM PVCs.
  66  *
  67  *  Must be invoked with rcu_read_lock (ie preempt disabled)
  68  *  or with RTNL.
  69  */
  70 struct net_device *__find_vlan_dev(struct net_device *real_dev, u16 vlan_id);
  71
  72 /* found in vlan_dev.c */
  73 int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev,
  74                   struct packet_type *ptype, struct net_device *orig_dev);
  75 void vlan_dev_set_ingress_priority(const struct net_device *dev,
  76                                    u32 skb_prio, u16 vlan_prio);
  77 int vlan_dev_set_egress_priority(const struct net_device *dev,
  78                                  u32 skb_prio, u16 vlan_prio);
  79 int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
  80 void vlan_dev_get_realdev_name(const struct net_device *dev, char *result);
  81
  82 int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id);
  83 void vlan_setup(struct net_device *dev);
  84 int register_vlan_dev(struct net_device *dev);
  85 void unregister_vlan_dev(struct net_device *dev);
  86
  87 static inline u32 vlan_get_ingress_priority(struct net_device *dev,
  88                                             u16 vlan_tci)
  89 {
  90         struct vlan_dev_info *vip = vlan_dev_info(dev);
  91
  92         return vip->ingress_priority_map[(vlan_tci >> 13) & 0x7];
  93 }
  94
  95 #ifdef CONFIG_VLAN_8021Q_GVRP
  96 extern int vlan_gvrp_request_join(const struct net_device *dev);
  97 extern void vlan_gvrp_request_leave(const struct net_device *dev);
  98 extern int vlan_gvrp_init_applicant(struct net_device *dev);
  99 extern void vlan_gvrp_uninit_applicant(struct net_device *dev);
 100 extern int vlan_gvrp_init(void);
 101 extern void vlan_gvrp_uninit(void);
 102 #else
 103 static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; }
 104 static inline void vlan_gvrp_request_leave(const struct net_device *dev) {}
 105 static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; }
 106 static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {}
 107 static inline int vlan_gvrp_init(void) { return 0; }
 108 static inline void vlan_gvrp_uninit(void) {}
 109 #endif
 110
 111 extern const char vlan_fullname[];
 112 extern const char vlan_version[];
 113 extern int vlan_netlink_init(void);
 114 extern void vlan_netlink_fini(void);
 115
 116 extern struct rtnl_link_ops vlan_link_ops;
 117
 118 static inline int is_vlan_dev(struct net_device *dev)
 119 {
 120         return dev->priv_flags & IFF_802_1Q_VLAN;
 121 }
 122
 123 extern int vlan_net_id;
 124
 125 struct proc_dir_entry;
 126
 127 struct vlan_net {
 128         /* /proc/net/vlan */
 129         struct proc_dir_entry *proc_vlan_dir;
 130         /* /proc/net/vlan/config */
 131         struct proc_dir_entry *proc_vlan_conf;
 132         /* Determines interface naming scheme. */
 133         unsigned short name_type;
 134 };
 135
 136 #endif /* !(__BEN_VLAN_802_1Q_INC__) */