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 #define MACVLAN_MC_FILTER_BITS 8 56 #define MACVLAN_MC_FILTER_SZ (1 << MACVLAN_MC_FILTER_BITS) 57 58 struct macvlan_dev { 59 struct net_device *dev; 60 struct list_head list; 61 struct hlist_node hlist; 62 struct macvlan_port *port; 63 struct net_device *lowerdev; 64 struct macvlan_pcpu_stats __percpu *pcpu_stats; 65 66 DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ); 67 68 enum macvlan_mode mode; 69 u16 flags; 70 int (*receive)(struct sk_buff *skb); 71 int (*forward)(struct net_device *dev, struct sk_buff *skb); 72 struct macvtap_queue *taps[MAX_MACVTAP_QUEUES]; 73 int numvtaps; 74 int minor; 75 }; 76 77 static inline void macvlan_count_rx(const struct macvlan_dev *vlan, 78 unsigned int len, bool success, 79 bool multicast) 80 { 81 if (likely(success)) { 82 struct macvlan_pcpu_stats *pcpu_stats; 83 84 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); 85 u64_stats_update_begin(&pcpu_stats->syncp); 86 pcpu_stats->rx_packets++; 87 pcpu_stats->rx_bytes += len; 88 if (multicast) 89 pcpu_stats->rx_multicast++; 90 u64_stats_update_end(&pcpu_stats->syncp); 91 } else { 92 this_cpu_inc(vlan->pcpu_stats->rx_errors); 93 } 94 } 95 96 extern void macvlan_common_setup(struct net_device *dev); 97 98 extern int macvlan_common_newlink(struct net *src_net, struct net_device *dev, 99 struct nlattr *tb[], struct nlattr *data[], 100 int (*receive)(struct sk_buff *skb), 101 int (*forward)(struct net_device *dev, 102 struct sk_buff *skb)); 103 104 extern void macvlan_count_rx(const struct macvlan_dev *vlan, 105 unsigned int len, bool success, 106 bool multicast); 107 108 extern void macvlan_dellink(struct net_device *dev, struct list_head *head); 109 110 extern int macvlan_link_register(struct rtnl_link_ops *ops); 111 112 extern netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, 113 struct net_device *dev); 114 115 #endif /* _LINUX_IF_MACVLAN_H */ 116