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 IS_ENABLED(CONFIG_MACVTAP) 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 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 netdev_features_t set_features; 69 enum macvlan_mode mode; 70 u16 flags; 71 int (*receive)(struct sk_buff *skb); 72 int (*forward)(struct net_device *dev, struct sk_buff *skb); 73 /* This array tracks active taps. */ 74 struct macvtap_queue __rcu *taps[MAX_MACVTAP_QUEUES]; 75 /* This list tracks all taps (both enabled and disabled) */ 76 struct list_head queue_list; 77 int numvtaps; 78 int numqueues; 79 netdev_features_t tap_features; 80 int minor; 81 }; 82 83 static inline void macvlan_count_rx(const struct macvlan_dev *vlan, 84 unsigned int len, bool success, 85 bool multicast) 86 { 87 if (likely(success)) { 88 struct macvlan_pcpu_stats *pcpu_stats; 89 90 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); 91 u64_stats_update_begin(&pcpu_stats->syncp); 92 pcpu_stats->rx_packets++; 93 pcpu_stats->rx_bytes += len; 94 if (multicast) 95 pcpu_stats->rx_multicast++; 96 u64_stats_update_end(&pcpu_stats->syncp); 97 } else { 98 this_cpu_inc(vlan->pcpu_stats->rx_errors); 99 } 100 } 101 102 extern void macvlan_common_setup(struct net_device *dev); 103 104 extern int macvlan_common_newlink(struct net *src_net, struct net_device *dev, 105 struct nlattr *tb[], struct nlattr *data[], 106 int (*receive)(struct sk_buff *skb), 107 int (*forward)(struct net_device *dev, 108 struct sk_buff *skb)); 109 110 extern void macvlan_count_rx(const struct macvlan_dev *vlan, 111 unsigned int len, bool success, 112 bool multicast); 113 114 extern void macvlan_dellink(struct net_device *dev, struct list_head *head); 115 116 extern int macvlan_link_register(struct rtnl_link_ops *ops); 117 118 extern netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, 119 struct net_device *dev); 120 121 #endif /* _LINUX_IF_MACVLAN_H */ 122