dfe816c5e3
Macvtap should be compatible with tuntap for
maximum number of queues.
commit 'baf71c5c1f80d82e92924050a60b5baaf97e3094 (tuntap:
Increase the number of queues in tun.)' removes
the limitations and increases number of queues in tuntap.
Now, Its safe to increase number of queues in Macvtap as well.
This patch also modifies 'macvtap_del_queues' function
to avoid extra memory allocation in stack.
Changes from v1->v2 :
Michael S. Tsirkin, Jason Wang :
Better way to use linked list to
avoid use of extra memory in stack.
Sergei Shtylyov : Specify dependent commit's summary.
Signed-off-by: Pankaj Gupta <pagupta@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
115 lines
2.8 KiB
C
115 lines
2.8 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/if_vlan.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 IS_ENABLED(CONFIG_MACVTAP)
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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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* 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 256
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#define MACVLAN_MC_FILTER_BITS 8
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#define MACVLAN_MC_FILTER_SZ (1 << MACVLAN_MC_FILTER_BITS)
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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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void *fwd_priv;
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struct vlan_pcpu_stats __percpu *pcpu_stats;
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DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ);
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netdev_features_t set_features;
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enum macvlan_mode mode;
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u16 flags;
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/* This array tracks active taps. */
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struct macvtap_queue __rcu *taps[MAX_MACVTAP_QUEUES];
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/* This list tracks all taps (both enabled and disabled) */
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struct list_head queue_list;
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int numvtaps;
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int numqueues;
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netdev_features_t tap_features;
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int minor;
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int nest_level;
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#ifdef CONFIG_NET_POLL_CONTROLLER
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struct netpoll *netpoll;
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#endif
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unsigned int macaddr_count;
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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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if (likely(success)) {
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struct vlan_pcpu_stats *pcpu_stats;
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pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
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u64_stats_update_begin(&pcpu_stats->syncp);
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pcpu_stats->rx_packets++;
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pcpu_stats->rx_bytes += len;
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if (multicast)
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pcpu_stats->rx_multicast++;
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u64_stats_update_end(&pcpu_stats->syncp);
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} else {
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this_cpu_inc(vlan->pcpu_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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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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#if IS_ENABLED(CONFIG_MACVLAN)
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static inline struct net_device *
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macvlan_dev_real_dev(const struct net_device *dev)
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{
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struct macvlan_dev *macvlan = netdev_priv(dev);
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return macvlan->lowerdev;
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}
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#else
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static inline struct net_device *
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macvlan_dev_real_dev(const struct net_device *dev)
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{
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BUG();
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return NULL;
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}
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#endif
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#endif /* _LINUX_IF_MACVLAN_H */
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