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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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1565c7c1c4
Implement multiqueue facility for macvtap driver. The idea is that a macvtap device can be opened multiple times and the fd's can be used to register eg, as backend for vhost. Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
102 lines
2.7 KiB
C
102 lines
2.7 KiB
C
#ifndef _LINUX_IF_MACVLAN_H
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#define _LINUX_IF_MACVLAN_H
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#include <linux/if_link.h>
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#include <linux/list.h>
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#include <linux/netdevice.h>
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#include <linux/netlink.h>
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#include <net/netlink.h>
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#include <linux/u64_stats_sync.h>
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#if defined(CONFIG_MACVTAP) || defined(CONFIG_MACVTAP_MODULE)
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struct socket *macvtap_get_socket(struct file *);
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#else
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#include <linux/err.h>
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#include <linux/errno.h>
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struct file;
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struct socket;
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static inline struct socket *macvtap_get_socket(struct file *f)
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{
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return ERR_PTR(-EINVAL);
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}
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#endif /* CONFIG_MACVTAP */
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struct macvlan_port;
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struct macvtap_queue;
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/**
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* struct macvlan_rx_stats - MACVLAN percpu rx stats
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* @rx_packets: number of received packets
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* @rx_bytes: number of received bytes
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* @rx_multicast: number of received multicast packets
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* @syncp: synchronization point for 64bit counters
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* @rx_errors: number of errors
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*/
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struct macvlan_rx_stats {
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u64 rx_packets;
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u64 rx_bytes;
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u64 rx_multicast;
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struct u64_stats_sync syncp;
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unsigned long rx_errors;
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};
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/*
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* Maximum times a macvtap device can be opened. This can be used to
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* configure the number of receive queue, e.g. for multiqueue virtio.
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*/
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#define MAX_MACVTAP_QUEUES (NR_CPUS < 16 ? NR_CPUS : 16)
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struct macvlan_dev {
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struct net_device *dev;
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struct list_head list;
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struct hlist_node hlist;
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struct macvlan_port *port;
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struct net_device *lowerdev;
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struct macvlan_rx_stats __percpu *rx_stats;
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enum macvlan_mode mode;
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int (*receive)(struct sk_buff *skb);
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int (*forward)(struct net_device *dev, struct sk_buff *skb);
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struct macvtap_queue *taps[MAX_MACVTAP_QUEUES];
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int numvtaps;
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};
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static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
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unsigned int len, bool success,
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bool multicast)
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{
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struct macvlan_rx_stats *rx_stats;
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rx_stats = this_cpu_ptr(vlan->rx_stats);
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if (likely(success)) {
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u64_stats_update_begin(&rx_stats->syncp);
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rx_stats->rx_packets++;;
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rx_stats->rx_bytes += len;
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if (multicast)
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rx_stats->rx_multicast++;
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u64_stats_update_end(&rx_stats->syncp);
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} else {
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rx_stats->rx_errors++;
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}
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}
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extern void macvlan_common_setup(struct net_device *dev);
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extern int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
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struct nlattr *tb[], struct nlattr *data[],
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int (*receive)(struct sk_buff *skb),
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int (*forward)(struct net_device *dev,
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struct sk_buff *skb));
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extern void macvlan_count_rx(const struct macvlan_dev *vlan,
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unsigned int len, bool success,
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bool multicast);
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extern void macvlan_dellink(struct net_device *dev, struct list_head *head);
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extern int macvlan_link_register(struct rtnl_link_ops *ops);
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extern netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
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struct net_device *dev);
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#endif /* _LINUX_IF_MACVLAN_H */
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