1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_IF_MACVLAN_H 3 #define _LINUX_IF_MACVLAN_H 4 5 #include <linux/if_link.h> 6 #include <linux/if_vlan.h> 7 #include <linux/list.h> 8 #include <linux/netdevice.h> 9 #include <linux/netlink.h> 10 #include <net/netlink.h> 11 #include <linux/u64_stats_sync.h> 12 13 struct macvlan_port; 14 struct macvtap_queue; 15 16 /* 17 * Maximum times a macvtap device can be opened. This can be used to 18 * configure the number of receive queue, e.g. for multiqueue virtio. 19 */ 20 #define MAX_TAP_QUEUES 256 21 22 #define MACVLAN_MC_FILTER_BITS 8 23 #define MACVLAN_MC_FILTER_SZ (1 << MACVLAN_MC_FILTER_BITS) 24 25 struct macvlan_dev { 26 struct net_device *dev; 27 struct list_head list; 28 struct hlist_node hlist; 29 struct macvlan_port *port; 30 struct net_device *lowerdev; 31 void *fwd_priv; 32 struct vlan_pcpu_stats __percpu *pcpu_stats; 33 34 DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ); 35 36 netdev_features_t set_features; 37 enum macvlan_mode mode; 38 u16 flags; 39 /* This array tracks active taps. */ 40 struct tap_queue __rcu *taps[MAX_TAP_QUEUES]; 41 /* This list tracks all taps (both enabled and disabled) */ 42 struct list_head queue_list; 43 int numvtaps; 44 int numqueues; 45 netdev_features_t tap_features; 46 int minor; 47 int nest_level; 48 #ifdef CONFIG_NET_POLL_CONTROLLER 49 struct netpoll *netpoll; 50 #endif 51 unsigned int macaddr_count; 52 }; 53 54 static inline void macvlan_count_rx(const struct macvlan_dev *vlan, 55 unsigned int len, bool success, 56 bool multicast) 57 { 58 if (likely(success)) { 59 struct vlan_pcpu_stats *pcpu_stats; 60 61 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); 62 u64_stats_update_begin(&pcpu_stats->syncp); 63 pcpu_stats->rx_packets++; 64 pcpu_stats->rx_bytes += len; 65 if (multicast) 66 pcpu_stats->rx_multicast++; 67 u64_stats_update_end(&pcpu_stats->syncp); 68 } else { 69 this_cpu_inc(vlan->pcpu_stats->rx_errors); 70 } 71 } 72 73 extern void macvlan_common_setup(struct net_device *dev); 74 75 extern int macvlan_common_newlink(struct net *src_net, struct net_device *dev, 76 struct nlattr *tb[], struct nlattr *data[]); 77 78 extern void macvlan_count_rx(const struct macvlan_dev *vlan, 79 unsigned int len, bool success, 80 bool multicast); 81 82 extern void macvlan_dellink(struct net_device *dev, struct list_head *head); 83 84 extern int macvlan_link_register(struct rtnl_link_ops *ops); 85 86 #if IS_ENABLED(CONFIG_MACVLAN) 87 static inline struct net_device * 88 macvlan_dev_real_dev(const struct net_device *dev) 89 { 90 struct macvlan_dev *macvlan = netdev_priv(dev); 91 92 return macvlan->lowerdev; 93 } 94 #else 95 static inline struct net_device * 96 macvlan_dev_real_dev(const struct net_device *dev) 97 { 98 BUG(); 99 return NULL; 100 } 101 #endif 102 103 #endif /* _LINUX_IF_MACVLAN_H */ 104