sockmap

struct proto unix_dgram_proto = {
	.name			= "UNIX",
	.owner			= THIS_MODULE,
	.obj_size		= sizeof(struct unix_sock),
	.close			= unix_close,
	.bpf_bypass_getsockopt	= unix_bpf_bypass_getsockopt, // 给 SEC("cgroup/getsockopt") 用的
#ifdef CONFIG_BPF_SYSCALL
	.psock_update_sk_prot	= unix_dgram_bpf_update_proto, // 居然是给 sockmap 用的
#endif
};

最后走到这里的: net/unix/unix_bpf.c

static void unix_dgram_bpf_rebuild_protos(struct proto *prot, const struct proto *base)
{
	*prot        = *base;
	prot->close  = sock_map_close;
	prot->recvmsg = unix_bpf_recvmsg;
	prot->sock_is_readable = sk_msg_is_readable;
}

sockmap

• https://arthurchiao.art/blog/socket-acceleration-with-ebpf-zh/
  • https://github.com/ArthurChiao/socket-acceleration-with-ebpf/blob/develop/bpf/load.sh
  • 写的很好了

• https://github.com/dippynark/bpf-sockmap

• https://blog.cloudflare.com/sockmap-tcp-splicing-of-the-future

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