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c353e8983e
Currently network taps unbound to any interface are linked in the global ptype_all list, affecting the performance in all the network namespaces. Add per netns ptypes chains, so that in the mentioned case only the netns owning the packet socket(s) is affected. While at that drop the global ptype_all list: no in kernel user registers a tap on "any" type without specifying either the target device or the target namespace (and IMHO doing that would not make any sense). Note that this adds a conditional in the fast path (to check for per netns ptype_specific list) and increases the dataset size by a cacheline (owing the per netns lists). Reviewed-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Eric Dumazet <edumaze@google.com> Link: https://patch.msgid.link/ae405f98875ee87f8150c460ad162de7e466f8a7.1742494826.git.pabeni@redhat.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef _NET_HOTDATA_H
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#define _NET_HOTDATA_H
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#include <linux/types.h>
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#include <linux/netdevice.h>
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#include <net/protocol.h>
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/* Read mostly data used in network fast paths. */
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struct net_hotdata {
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#if IS_ENABLED(CONFIG_INET)
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struct packet_offload ip_packet_offload;
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struct net_offload tcpv4_offload;
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struct net_protocol tcp_protocol;
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struct net_offload udpv4_offload;
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struct net_protocol udp_protocol;
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struct packet_offload ipv6_packet_offload;
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struct net_offload tcpv6_offload;
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#if IS_ENABLED(CONFIG_IPV6)
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struct inet6_protocol tcpv6_protocol;
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struct inet6_protocol udpv6_protocol;
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#endif
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struct net_offload udpv6_offload;
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#endif
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struct list_head offload_base;
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struct kmem_cache *skbuff_cache;
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struct kmem_cache *skbuff_fclone_cache;
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struct kmem_cache *skb_small_head_cache;
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#ifdef CONFIG_RPS
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struct rps_sock_flow_table __rcu *rps_sock_flow_table;
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u32 rps_cpu_mask;
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#endif
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int gro_normal_batch;
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int netdev_budget;
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int netdev_budget_usecs;
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int tstamp_prequeue;
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int max_backlog;
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int dev_tx_weight;
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int dev_rx_weight;
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int sysctl_max_skb_frags;
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int sysctl_skb_defer_max;
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int sysctl_mem_pcpu_rsv;
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};
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#define inet_ehash_secret net_hotdata.tcp_protocol.secret
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#define udp_ehash_secret net_hotdata.udp_protocol.secret
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#define inet6_ehash_secret net_hotdata.tcpv6_protocol.secret
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#define tcp_ipv6_hash_secret net_hotdata.tcpv6_offload.secret
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#define udp6_ehash_secret net_hotdata.udpv6_protocol.secret
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#define udp_ipv6_hash_secret net_hotdata.udpv6_offload.secret
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extern struct net_hotdata net_hotdata;
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#endif /* _NET_HOTDATA_H */
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