1 #ifndef _LINUX_IF_MACVLAN_H 2 #define _LINUX_IF_MACVLAN_H 3 4 #include <linux/if_link.h> 5 #include <linux/list.h> 6 #include <linux/netdevice.h> 7 #include <linux/netlink.h> 8 #include <net/netlink.h> 9 #include <linux/u64_stats_sync.h> 10 11 #if defined(CONFIG_MACVTAP) || defined(CONFIG_MACVTAP_MODULE) 12 struct socket *macvtap_get_socket(struct file *); 13 #else 14 #include <linux/err.h> 15 #include <linux/errno.h> 16 struct file; 17 struct socket; 18 static inline struct socket *macvtap_get_socket(struct file *f) 19 { 20 return ERR_PTR(-EINVAL); 21 } 22 #endif /* CONFIG_MACVTAP */ 23 24 struct macvlan_port; 25 struct macvtap_queue; 26 27 /** 28 * struct macvlan_pcpu_stats - MACVLAN percpu stats 29 * @rx_packets: number of received packets 30 * @rx_bytes: number of received bytes 31 * @rx_multicast: number of received multicast packets 32 * @tx_packets: number of transmitted packets 33 * @tx_bytes: number of transmitted bytes 34 * @syncp: synchronization point for 64bit counters 35 * @rx_errors: number of rx errors 36 * @tx_dropped: number of tx dropped packets 37 */ 38 struct macvlan_pcpu_stats { 39 u64 rx_packets; 40 u64 rx_bytes; 41 u64 rx_multicast; 42 u64 tx_packets; 43 u64 tx_bytes; 44 struct u64_stats_sync syncp; 45 u32 rx_errors; 46 u32 tx_dropped; 47 }; 48 49 /* 50 * Maximum times a macvtap device can be opened. This can be used to 51 * configure the number of receive queue, e.g. for multiqueue virtio. 52 */ 53 #define MAX_MACVTAP_QUEUES (NR_CPUS < 16 ? NR_CPUS : 16) 54 55 struct macvlan_dev { 56 struct net_device *dev; 57 struct list_head list; 58 struct hlist_node hlist; 59 struct macvlan_port *port; 60 struct net_device *lowerdev; 61 struct macvlan_pcpu_stats __percpu *pcpu_stats; 62 enum macvlan_mode mode; 63 int (*receive)(struct sk_buff *skb); 64 int (*forward)(struct net_device *dev, struct sk_buff *skb); 65 struct macvtap_queue *taps[MAX_MACVTAP_QUEUES]; 66 int numvtaps; 67 }; 68 69 static inline void macvlan_count_rx(const struct macvlan_dev *vlan, 70 unsigned int len, bool success, 71 bool multicast) 72 { 73 if (likely(success)) { 74 struct macvlan_pcpu_stats *pcpu_stats; 75 76 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); 77 u64_stats_update_begin(&pcpu_stats->syncp); 78 pcpu_stats->rx_packets++; 79 pcpu_stats->rx_bytes += len; 80 if (multicast) 81 pcpu_stats->rx_multicast++; 82 u64_stats_update_end(&pcpu_stats->syncp); 83 } else { 84 this_cpu_inc(vlan->pcpu_stats->rx_errors); 85 } 86 } 87 88 extern void macvlan_common_setup(struct net_device *dev); 89 90 extern int macvlan_common_newlink(struct net *src_net, struct net_device *dev, 91 struct nlattr *tb[], struct nlattr *data[], 92 int (*receive)(struct sk_buff *skb), 93 int (*forward)(struct net_device *dev, 94 struct sk_buff *skb)); 95 96 extern void macvlan_count_rx(const struct macvlan_dev *vlan, 97 unsigned int len, bool success, 98 bool multicast); 99 100 extern void macvlan_dellink(struct net_device *dev, struct list_head *head); 101 102 extern int macvlan_link_register(struct rtnl_link_ops *ops); 103 104 extern netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, 105 struct net_device *dev); 106 107 #endif /* _LINUX_IF_MACVLAN_H */ 108