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linux/include/net/hotdata.h

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net: introduce struct net_hotdata Instead of spreading networking critical fields all over the places, add a custom net_hotdata structure so that we can precisely control its layout. In this first patch, move : - gro_normal_batch used in rx (GRO stack) - offload_base used in rx and tx (GRO and TSO stacks) Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-2-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:14 +00:00
/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _NET_HOTDATA_H
#define _NET_HOTDATA_H
#include <linux/types.h>
net: move ip_packet_offload and ipv6_packet_offload to net_hotdata These structures are used in GRO and GSO paths. v2: ipv6_packet_offload definition depends on CONFIG_INET Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-7-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:19 +00:00
#include <linux/netdevice.h>
net: move tcpv4_offload and tcpv6_offload to net_hotdata These are used in TCP fast paths. Move them into net_hotdata for better cache locality. v2: tcpv6_offload definition depends on CONFIG_INET Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-8-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:20 +00:00
#include <net/protocol.h>
net: introduce struct net_hotdata Instead of spreading networking critical fields all over the places, add a custom net_hotdata structure so that we can precisely control its layout. In this first patch, move : - gro_normal_batch used in rx (GRO stack) - offload_base used in rx and tx (GRO and TSO stacks) Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-2-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:14 +00:00
/* Read mostly data used in network fast paths. */
struct net_hotdata {
net: move ip_packet_offload and ipv6_packet_offload to net_hotdata These structures are used in GRO and GSO paths. v2: ipv6_packet_offload definition depends on CONFIG_INET Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-7-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:19 +00:00
#if IS_ENABLED(CONFIG_INET)
struct packet_offload ip_packet_offload;
net: move tcpv4_offload and tcpv6_offload to net_hotdata These are used in TCP fast paths. Move them into net_hotdata for better cache locality. v2: tcpv6_offload definition depends on CONFIG_INET Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-8-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:20 +00:00
struct net_offload tcpv4_offload;
inet: move tcp_protocol and udp_protocol to net_hotdata These structures are read in rx path, move them to net_hotdata for better cache locality. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-14-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:26 +00:00
struct net_protocol tcp_protocol;
udp: move udpv4_offload and udpv6_offload to net_hotdata These structures are used in GRO and GSO paths. Move them to net_hodata for better cache locality. v2: udpv6_offload definition depends on CONFIG_INET=y Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-12-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:24 +00:00
struct net_offload udpv4_offload;
inet: move tcp_protocol and udp_protocol to net_hotdata These structures are read in rx path, move them to net_hotdata for better cache locality. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-14-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:26 +00:00
struct net_protocol udp_protocol;
net: move ip_packet_offload and ipv6_packet_offload to net_hotdata These structures are used in GRO and GSO paths. v2: ipv6_packet_offload definition depends on CONFIG_INET Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-7-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:19 +00:00
struct packet_offload ipv6_packet_offload;
net: move tcpv4_offload and tcpv6_offload to net_hotdata These are used in TCP fast paths. Move them into net_hotdata for better cache locality. v2: tcpv6_offload definition depends on CONFIG_INET Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-8-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:20 +00:00
struct net_offload tcpv6_offload;
ipv6: move tcpv6_protocol and udpv6_protocol to net_hotdata These structures are read in rx path, move them to net_hotdata for better cache locality. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-13-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:25 +00:00
#if IS_ENABLED(CONFIG_IPV6)
struct inet6_protocol tcpv6_protocol;
struct inet6_protocol udpv6_protocol;
#endif
udp: move udpv4_offload and udpv6_offload to net_hotdata These structures are used in GRO and GSO paths. Move them to net_hodata for better cache locality. v2: udpv6_offload definition depends on CONFIG_INET=y Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-12-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:24 +00:00
struct net_offload udpv6_offload;
net: move ip_packet_offload and ipv6_packet_offload to net_hotdata These structures are used in GRO and GSO paths. v2: ipv6_packet_offload definition depends on CONFIG_INET Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-7-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:19 +00:00
#endif
net: introduce struct net_hotdata Instead of spreading networking critical fields all over the places, add a custom net_hotdata structure so that we can precisely control its layout. In this first patch, move : - gro_normal_batch used in rx (GRO stack) - offload_base used in rx and tx (GRO and TSO stacks) Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-2-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:14 +00:00
struct list_head offload_base;
net: move ptype_all into net_hotdata ptype_all is used in rx/tx fast paths. Move it to net_hotdata for better cache locality. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-5-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:17 +00:00
struct list_head ptype_all;
net: move skbuff_cache(s) to net_hotdata skbuff_cache, skbuff_fclone_cache and skb_small_head_cache are used in rx/tx fast paths. Move them to net_hotdata for better cache locality. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-11-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:23 +00:00
struct kmem_cache *skbuff_cache;
struct kmem_cache *skbuff_fclone_cache;
struct kmem_cache *skb_small_head_cache;
net: move rps_sock_flow_table to net_hotdata rps_sock_flow_table and rps_cpu_mask are used in fast path. Move them to net_hotdata for better cache locality. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-19-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:31 +00:00
#ifdef CONFIG_RPS
struct rps_sock_flow_table __rcu *rps_sock_flow_table;
u32 rps_cpu_mask;
#endif
net: introduce struct net_hotdata Instead of spreading networking critical fields all over the places, add a custom net_hotdata structure so that we can precisely control its layout. In this first patch, move : - gro_normal_batch used in rx (GRO stack) - offload_base used in rx and tx (GRO and TSO stacks) Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-2-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:14 +00:00
int gro_normal_batch;
net: move netdev_budget and netdev_budget to net_hotdata netdev_budget and netdev_budget are used in rx path (net_rx_action()) Move them into net_hotdata for better cache locality. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-3-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:15 +00:00
int netdev_budget;
int netdev_budget_usecs;
net: move netdev_tstamp_prequeue into net_hotdata netdev_tstamp_prequeue is used in rx path. Move it to net_hotdata for better cache locality. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-4-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:16 +00:00
int tstamp_prequeue;
net: move netdev_max_backlog to net_hotdata netdev_max_backlog is used in rx fat path. Move it to net_hodata for better cache locality. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-6-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:18 +00:00
int max_backlog;
net: move dev_tx_weight to net_hotdata dev_tx_weight is used in tx fast path. Move it to net_hotdata for better cache locality. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-9-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:21 +00:00
int dev_tx_weight;
net: move dev_rx_weight to net_hotdata dev_rx_weight is read from process_backlog(). Move it to net_hotdata for better cache locality. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-10-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:22 +00:00
int dev_rx_weight;
net: move sysctl_max_skb_frags to net_hotdata sysctl_max_skb_frags is used in TCP and MPTCP fast paths, move it to net_hodata for better cache locality. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240429134025.1233626-2-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-04-29 13:40:21 +00:00
int sysctl_max_skb_frags;
net: move sysctl_skb_defer_max to net_hotdata sysctl_skb_defer_max is used in TCP fast path, move it to net_hodata. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240429134025.1233626-3-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-04-29 13:40:22 +00:00
int sysctl_skb_defer_max;
net: move sysctl_mem_pcpu_rsv to net_hotdata sysctl_mem_pcpu_rsv is used in TCP fast path, move it to net_hodata for better cache locality. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240429134025.1233626-6-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-04-29 13:40:25 +00:00
int sysctl_mem_pcpu_rsv;
net: introduce struct net_hotdata Instead of spreading networking critical fields all over the places, add a custom net_hotdata structure so that we can precisely control its layout. In this first patch, move : - gro_normal_batch used in rx (GRO stack) - offload_base used in rx and tx (GRO and TSO stacks) Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-2-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:14 +00:00
};
inet: move inet_ehash_secret and udp_ehash_secret into net_hotdata "struct net_protocol" has a 32bit hole in 32bit arches. Use it to store the 32bit secret used by UDP and TCP, to increase cache locality in rx path. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-15-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:27 +00:00
#define inet_ehash_secret net_hotdata.tcp_protocol.secret
#define udp_ehash_secret net_hotdata.udp_protocol.secret
ipv6: move inet6_ehash_secret and udp6_ehash_secret into net_hotdata "struct inet6_protocol" has a 32bit hole in 32bit arches. Use it to store the 32bit secret used by UDP and TCP, to increase cache locality in rx path. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-16-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:28 +00:00
#define inet6_ehash_secret net_hotdata.tcpv6_protocol.secret
ipv6: move tcp_ipv6_hash_secret and udp_ipv6_hash_secret to net_hotdata Use a 32bit hole in "struct net_offload" to store the remaining 32bit secrets used by TCPv6 and UDPv6. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-17-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:29 +00:00
#define tcp_ipv6_hash_secret net_hotdata.tcpv6_offload.secret
ipv6: move inet6_ehash_secret and udp6_ehash_secret into net_hotdata "struct inet6_protocol" has a 32bit hole in 32bit arches. Use it to store the 32bit secret used by UDP and TCP, to increase cache locality in rx path. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-16-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:28 +00:00
#define udp6_ehash_secret net_hotdata.udpv6_protocol.secret
ipv6: move tcp_ipv6_hash_secret and udp_ipv6_hash_secret to net_hotdata Use a 32bit hole in "struct net_offload" to store the remaining 32bit secrets used by TCPv6 and UDPv6. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-17-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:29 +00:00
#define udp_ipv6_hash_secret net_hotdata.udpv6_offload.secret
inet: move inet_ehash_secret and udp_ehash_secret into net_hotdata "struct net_protocol" has a 32bit hole in 32bit arches. Use it to store the 32bit secret used by UDP and TCP, to increase cache locality in rx path. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-15-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:27 +00:00
net: introduce struct net_hotdata Instead of spreading networking critical fields all over the places, add a custom net_hotdata structure so that we can precisely control its layout. In this first patch, move : - gro_normal_batch used in rx (GRO stack) - offload_base used in rx and tx (GRO and TSO stacks) Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240306160031.874438-2-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-03-06 16:00:14 +00:00
extern struct net_hotdata net_hotdata;
#endif /* _NET_HOTDATA_H */
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