/* SPDX-License-Identifier: GPL-2.0 */
#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>

struct macvlan_port;

#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;
        netdevice_tracker       dev_tracker;
        void                    *accel_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;
        unsigned int            macaddr_count;
        u32                     bc_queue_len_req;
#ifdef CONFIG_NET_POLL_CONTROLLER
        struct netpoll          *netpoll;
#endif
};

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 = get_cpu_ptr(vlan->pcpu_stats);
                u64_stats_update_begin(&pcpu_stats->syncp);
                u64_stats_inc(&pcpu_stats->rx_packets);
                u64_stats_add(&pcpu_stats->rx_bytes, len);
                if (multicast)
                        u64_stats_inc(&pcpu_stats->rx_multicast);
                u64_stats_update_end(&pcpu_stats->syncp);
                put_cpu_ptr(vlan->pcpu_stats);
        } else {
                this_cpu_inc(vlan->pcpu_stats->rx_errors);
        }
}

extern void macvlan_common_setup(struct net_device *dev);

struct rtnl_newlink_params;

extern int macvlan_common_newlink(struct net_device *dev,
                                  struct rtnl_newlink_params *params,
                                  struct netlink_ext_ack *extack);

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

static inline void *macvlan_accel_priv(struct net_device *dev)
{
        struct macvlan_dev *macvlan = netdev_priv(dev);

        return macvlan->accel_priv;
}

static inline bool macvlan_supports_dest_filter(struct net_device *dev)
{
        struct macvlan_dev *macvlan = netdev_priv(dev);

        return macvlan->mode == MACVLAN_MODE_PRIVATE ||
               macvlan->mode == MACVLAN_MODE_VEPA ||
               macvlan->mode == MACVLAN_MODE_BRIDGE;
}

static inline int macvlan_release_l2fw_offload(struct net_device *dev)
{
        struct macvlan_dev *macvlan = netdev_priv(dev);

        macvlan->accel_priv = NULL;
        return dev_uc_add(macvlan->lowerdev, dev->dev_addr);
}
#endif /* _LINUX_IF_MACVLAN_H */