include/net/hotdata.h

root/include/net/hotdata.h
/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _NET_HOTDATA_H
#define _NET_HOTDATA_H

#include <linux/llist.h>
#include <linux/types.h>
#include <linux/netdevice.h>
#include <net/protocol.h>

struct skb_defer_node {
        struct llist_head       defer_list;
        atomic_long_t           defer_count;
} ____cacheline_aligned_in_smp;

/* Read mostly data used in network fast paths. */
struct net_hotdata {
#if IS_ENABLED(CONFIG_INET)
        struct packet_offload   ip_packet_offload;
        struct net_offload      tcpv4_offload;
        struct net_protocol     tcp_protocol;
        struct net_offload      udpv4_offload;
        struct net_protocol     udp_protocol;
        struct packet_offload   ipv6_packet_offload;
        struct net_offload      tcpv6_offload;
#if IS_ENABLED(CONFIG_IPV6)
        struct inet6_protocol   tcpv6_protocol;
        struct inet6_protocol   udpv6_protocol;
#endif
        struct net_offload      udpv6_offload;
#endif
        struct list_head        offload_base;
        struct kmem_cache       *skbuff_cache;
        struct kmem_cache       *skbuff_fclone_cache;
        struct kmem_cache       *skb_small_head_cache;
#ifdef CONFIG_RPS
        struct rps_sock_flow_table __rcu *rps_sock_flow_table;
        u32                     rps_cpu_mask;
#endif
        struct skb_defer_node __percpu *skb_defer_nodes;
        int                     gro_normal_batch;
        int                     netdev_budget;
        int                     netdev_budget_usecs;
        int                     tstamp_prequeue;
        int                     max_backlog;
        int                     qdisc_max_burst;
        int                     dev_tx_weight;
        int                     dev_rx_weight;
        int                     sysctl_max_skb_frags;
        int                     sysctl_skb_defer_max;
        int                     sysctl_mem_pcpu_rsv;
};

#define inet_ehash_secret       net_hotdata.tcp_protocol.secret
#define udp_ehash_secret        net_hotdata.udp_protocol.secret
#define inet6_ehash_secret      net_hotdata.tcpv6_protocol.secret
#define tcp_ipv6_hash_secret    net_hotdata.tcpv6_offload.secret
#define udp6_ehash_secret       net_hotdata.udpv6_protocol.secret
#define udp_ipv6_hash_secret    net_hotdata.udpv6_offload.secret

extern struct net_hotdata net_hotdata;

#endif /* _NET_HOTDATA_H */
Linux
