root/include/linux/if_macvlan.h

DEFINITIONS

1. macvtap_get_socket
2. macvlan_count_rx
3. macvlan_dev_real_dev
4. macvlan_dev_real_dev

#ifndef _LINUX_IF_MACVLAN_H
#define _LINUX_IF_MACVLAN_H

#include <linux/if_link.h>
#include <linux/if_vlan.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/netlink.h>
#include <net/netlink.h>
#include <linux/u64_stats_sync.h>

#if IS_ENABLED(CONFIG_MACVTAP)
struct socket *macvtap_get_socket(struct file *);
#else
#include <linux/err.h>
#include <linux/errno.h>
struct file;
struct socket;
static inline struct socket *macvtap_get_socket(struct file *f)
{
        return ERR_PTR(-EINVAL);
}
#endif /* CONFIG_MACVTAP */

struct macvlan_port;
struct macvtap_queue;

/*
 * Maximum times a macvtap device can be opened. This can be used to
 * configure the number of receive queue, e.g. for multiqueue virtio.
 */
#define MAX_MACVTAP_QUEUES      16

#define MACVLAN_MC_FILTER_BITS  8
#define MACVLAN_MC_FILTER_SZ    (1 << MACVLAN_MC_FILTER_BITS)

struct macvlan_dev {
        struct net_device       *dev;
        struct list_head        list;
        struct hlist_node       hlist;
        struct macvlan_port     *port;
        struct net_device       *lowerdev;
        void                    *fwd_priv;
        struct vlan_pcpu_stats __percpu *pcpu_stats;

        DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ);

        netdev_features_t       set_features;
        enum macvlan_mode       mode;
        u16                     flags;
        /* This array tracks active taps. */
        struct macvtap_queue    __rcu *taps[MAX_MACVTAP_QUEUES];
        /* This list tracks all taps (both enabled and disabled) */
        struct list_head        queue_list;
        int                     numvtaps;
        int                     numqueues;
        netdev_features_t       tap_features;
        int                     minor;
        int                     nest_level;
#ifdef CONFIG_NET_POLL_CONTROLLER
        struct netpoll          *netpoll;
#endif
        unsigned int            macaddr_count;
};

static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
                                    unsigned int len, bool success,
                                    bool multicast)
{
        if (likely(success)) {
                struct vlan_pcpu_stats *pcpu_stats;

                pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
                u64_stats_update_begin(&pcpu_stats->syncp);
                pcpu_stats->rx_packets++;
                pcpu_stats->rx_bytes += len;
                if (multicast)
                        pcpu_stats->rx_multicast++;
                u64_stats_update_end(&pcpu_stats->syncp);
        } else {
                this_cpu_inc(vlan->pcpu_stats->rx_errors);
        }
}

extern void macvlan_common_setup(struct net_device *dev);

extern int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
                                  struct nlattr *tb[], struct nlattr *data[]);

extern void macvlan_count_rx(const struct macvlan_dev *vlan,
                             unsigned int len, bool success,
                             bool multicast);

extern void macvlan_dellink(struct net_device *dev, struct list_head *head);

extern int macvlan_link_register(struct rtnl_link_ops *ops);

#if IS_ENABLED(CONFIG_MACVLAN)
static inline struct net_device *
macvlan_dev_real_dev(const struct net_device *dev)
{
        struct macvlan_dev *macvlan = netdev_priv(dev);

        return macvlan->lowerdev;
}
#else
static inline struct net_device *
macvlan_dev_real_dev(const struct net_device *dev)
{
        BUG();
        return NULL;
}
#endif

#endif /* _LINUX_IF_MACVLAN_H */