vlan.h

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#ifndef __BEN_VLAN_802_1Q_INC__
#define __BEN_VLAN_802_1Q_INC__

#include <linux/if_vlan.h>
#include <linux/u64_stats_sync.h>
#include <linux/list.h>


struct vlan_priority_tci_mapping {
    u32                 priority;
    u16                 vlan_qos;
    struct vlan_priority_tci_mapping    *next;
};


struct vlan_pcpu_stats {
    u64         rx_packets;
    u64         rx_bytes;
    u64         rx_multicast;
    u64         tx_packets;
    u64         tx_bytes;
    struct u64_stats_sync   syncp;
    u32         rx_errors;
    u32         tx_dropped;
};

struct netpoll;

struct vlan_dev_priv {
    unsigned int                nr_ingress_mappings;
    u32                 ingress_priority_map[8];
    unsigned int                nr_egress_mappings;
    struct vlan_priority_tci_mapping    *egress_priority_map[16];

    u16                 vlan_id;
    u16                 flags;

    struct net_device           *real_dev;
    unsigned char               real_dev_addr[ETH_ALEN];

    struct proc_dir_entry           *dent;
    struct vlan_pcpu_stats __percpu     *vlan_pcpu_stats;
#ifdef CONFIG_NET_POLL_CONTROLLER
    struct netpoll              *netpoll;
#endif
};

static inline struct vlan_dev_priv *vlan_dev_priv(const struct net_device *dev)
{
    return netdev_priv(dev);
}

/* if this changes, algorithm will have to be reworked because this
 * depends on completely exhausting the VLAN identifier space.  Thus
 * it gives constant time look-up, but in many cases it wastes memory.
 */
#define VLAN_GROUP_ARRAY_SPLIT_PARTS  8
#define VLAN_GROUP_ARRAY_PART_LEN     (VLAN_N_VID/VLAN_GROUP_ARRAY_SPLIT_PARTS)

struct vlan_group {
    unsigned int        nr_vlan_devs;
    struct hlist_node   hlist;  /* linked list */
    struct net_device **vlan_devices_arrays[VLAN_GROUP_ARRAY_SPLIT_PARTS];
};

struct vlan_info {
    struct net_device   *real_dev; /* The ethernet(like) device
                        * the vlan is attached to.
                        */
    struct vlan_group   grp;
    struct list_head    vid_list;
    unsigned int        nr_vids;
    struct rcu_head     rcu;
};

static inline struct net_device *vlan_group_get_device(struct vlan_group *vg,
                               u16 vlan_id)
{
    struct net_device **array;
    array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
    return array ? array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] : NULL;
}

static inline void vlan_group_set_device(struct vlan_group *vg,
                     u16 vlan_id,
                     struct net_device *dev)
{
    struct net_device **array;
    if (!vg)
        return;
    array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
    array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
}

/* Must be invoked with rcu_read_lock or with RTNL. */
static inline struct net_device *vlan_find_dev(struct net_device *real_dev,
                           u16 vlan_id)
{
    struct vlan_info *vlan_info = rcu_dereference_rtnl(real_dev->vlan_info);

    if (vlan_info)
        return vlan_group_get_device(&vlan_info->grp, vlan_id);

    return NULL;
}

/* found in vlan_dev.c */
void vlan_dev_set_ingress_priority(const struct net_device *dev,
                   u32 skb_prio, u16 vlan_prio);
int vlan_dev_set_egress_priority(const struct net_device *dev,
                 u32 skb_prio, u16 vlan_prio);
int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
void vlan_dev_get_realdev_name(const struct net_device *dev, char *result);

int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id);
void vlan_setup(struct net_device *dev);
int register_vlan_dev(struct net_device *dev);
void unregister_vlan_dev(struct net_device *dev, struct list_head *head);

static inline u32 vlan_get_ingress_priority(struct net_device *dev,
                        u16 vlan_tci)
{
    struct vlan_dev_priv *vip = vlan_dev_priv(dev);

    return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7];
}

#ifdef CONFIG_VLAN_8021Q_GVRP
extern int vlan_gvrp_request_join(const struct net_device *dev);
extern void vlan_gvrp_request_leave(const struct net_device *dev);
extern int vlan_gvrp_init_applicant(struct net_device *dev);
extern void vlan_gvrp_uninit_applicant(struct net_device *dev);
extern int vlan_gvrp_init(void);
extern void vlan_gvrp_uninit(void);
#else
static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; }
static inline void vlan_gvrp_request_leave(const struct net_device *dev) {}
static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; }
static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {}
static inline int vlan_gvrp_init(void) { return 0; }
static inline void vlan_gvrp_uninit(void) {}
#endif

extern const char vlan_fullname[];
extern const char vlan_version[];
extern int vlan_netlink_init(void);
extern void vlan_netlink_fini(void);

extern struct rtnl_link_ops vlan_link_ops;

extern int vlan_net_id;

struct proc_dir_entry;

struct vlan_net {
    /* /proc/net/vlan */
    struct proc_dir_entry *proc_vlan_dir;
    /* /proc/net/vlan/config */
    struct proc_dir_entry *proc_vlan_conf;
    /* Determines interface naming scheme. */
    unsigned short name_type;
};

#endif /* !(__BEN_VLAN_802_1Q_INC__) */