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With multi queue devices, its possible that several cpus call vlan RX routines simultaneously for the same vlan device. We update RX stats counter without any locking, so we can get slightly wrong counters. One possible fix is to use percpu counters, to get precise accounting and also get guarantee of no cache line ping pongs between cpus. Note: this adds 16 bytes (32 bytes on 64bit arches) of percpu data per vlan device. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
154 lines
5.0 KiB
C
154 lines
5.0 KiB
C
#ifndef __BEN_VLAN_802_1Q_INC__
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#define __BEN_VLAN_802_1Q_INC__
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#include <linux/if_vlan.h>
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/**
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* struct vlan_priority_tci_mapping - vlan egress priority mappings
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* @priority: skb priority
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* @vlan_qos: vlan priority: (skb->priority << 13) & 0xE000
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* @next: pointer to next struct
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*/
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struct vlan_priority_tci_mapping {
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u32 priority;
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u16 vlan_qos;
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struct vlan_priority_tci_mapping *next;
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};
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/**
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* struct vlan_rx_stats - VLAN 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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* @multicast: number of received multicast packets
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* @rx_errors: number of errors
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*/
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struct vlan_rx_stats {
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unsigned long rx_packets;
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unsigned long rx_bytes;
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unsigned long multicast;
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unsigned long rx_errors;
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};
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/**
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* struct vlan_dev_info - VLAN private device data
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* @nr_ingress_mappings: number of ingress priority mappings
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* @ingress_priority_map: ingress priority mappings
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* @nr_egress_mappings: number of egress priority mappings
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* @egress_priority_map: hash of egress priority mappings
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* @vlan_id: VLAN identifier
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* @flags: device flags
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* @real_dev: underlying netdevice
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* @real_dev_addr: address of underlying netdevice
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* @dent: proc dir entry
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* @cnt_inc_headroom_on_tx: statistic - number of skb expansions on TX
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* @cnt_encap_on_xmit: statistic - number of skb encapsulations on TX
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* @vlan_rx_stats: ptr to percpu rx stats
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*/
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struct vlan_dev_info {
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unsigned int nr_ingress_mappings;
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u32 ingress_priority_map[8];
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unsigned int nr_egress_mappings;
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struct vlan_priority_tci_mapping *egress_priority_map[16];
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u16 vlan_id;
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u16 flags;
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struct net_device *real_dev;
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unsigned char real_dev_addr[ETH_ALEN];
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struct proc_dir_entry *dent;
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unsigned long cnt_inc_headroom_on_tx;
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unsigned long cnt_encap_on_xmit;
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struct vlan_rx_stats *vlan_rx_stats;
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};
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static inline struct vlan_dev_info *vlan_dev_info(const struct net_device *dev)
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{
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return netdev_priv(dev);
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}
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#define VLAN_GRP_HASH_SHIFT 5
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#define VLAN_GRP_HASH_SIZE (1 << VLAN_GRP_HASH_SHIFT)
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#define VLAN_GRP_HASH_MASK (VLAN_GRP_HASH_SIZE - 1)
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/* Find a VLAN device by the MAC address of its Ethernet device, and
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* it's VLAN ID. The default configuration is to have VLAN's scope
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* to be box-wide, so the MAC will be ignored. The mac will only be
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* looked at if we are configured to have a separate set of VLANs per
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* each MAC addressable interface. Note that this latter option does
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* NOT follow the spec for VLANs, but may be useful for doing very
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* large quantities of VLAN MUX/DEMUX onto FrameRelay or ATM PVCs.
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*
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* Must be invoked with rcu_read_lock (ie preempt disabled)
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* or with RTNL.
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*/
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struct net_device *__find_vlan_dev(struct net_device *real_dev, u16 vlan_id);
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/* found in vlan_dev.c */
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int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev,
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struct packet_type *ptype, struct net_device *orig_dev);
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void vlan_dev_set_ingress_priority(const struct net_device *dev,
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u32 skb_prio, u16 vlan_prio);
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int vlan_dev_set_egress_priority(const struct net_device *dev,
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u32 skb_prio, u16 vlan_prio);
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int vlan_dev_change_flags(const struct net_device *dev, u32 flag, u32 mask);
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void vlan_dev_get_realdev_name(const struct net_device *dev, char *result);
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int vlan_check_real_dev(struct net_device *real_dev, u16 vlan_id);
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void vlan_setup(struct net_device *dev);
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int register_vlan_dev(struct net_device *dev);
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void unregister_vlan_dev(struct net_device *dev, struct list_head *head);
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static inline u32 vlan_get_ingress_priority(struct net_device *dev,
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u16 vlan_tci)
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{
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struct vlan_dev_info *vip = vlan_dev_info(dev);
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return vip->ingress_priority_map[(vlan_tci >> VLAN_PRIO_SHIFT) & 0x7];
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}
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#ifdef CONFIG_VLAN_8021Q_GVRP
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extern int vlan_gvrp_request_join(const struct net_device *dev);
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extern void vlan_gvrp_request_leave(const struct net_device *dev);
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extern int vlan_gvrp_init_applicant(struct net_device *dev);
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extern void vlan_gvrp_uninit_applicant(struct net_device *dev);
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extern int vlan_gvrp_init(void);
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extern void vlan_gvrp_uninit(void);
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#else
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static inline int vlan_gvrp_request_join(const struct net_device *dev) { return 0; }
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static inline void vlan_gvrp_request_leave(const struct net_device *dev) {}
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static inline int vlan_gvrp_init_applicant(struct net_device *dev) { return 0; }
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static inline void vlan_gvrp_uninit_applicant(struct net_device *dev) {}
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static inline int vlan_gvrp_init(void) { return 0; }
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static inline void vlan_gvrp_uninit(void) {}
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#endif
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extern const char vlan_fullname[];
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extern const char vlan_version[];
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extern int vlan_netlink_init(void);
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extern void vlan_netlink_fini(void);
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extern struct rtnl_link_ops vlan_link_ops;
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static inline int is_vlan_dev(struct net_device *dev)
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{
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return dev->priv_flags & IFF_802_1Q_VLAN;
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}
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extern int vlan_net_id;
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struct proc_dir_entry;
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struct vlan_net {
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/* /proc/net/vlan */
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struct proc_dir_entry *proc_vlan_dir;
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/* /proc/net/vlan/config */
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struct proc_dir_entry *proc_vlan_conf;
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/* Determines interface naming scheme. */
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unsigned short name_type;
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};
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#endif /* !(__BEN_VLAN_802_1Q_INC__) */
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