mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 09:40:58 +07:00
71489e21d7
Refactor the UDP/TCP handlers slightly to allow skb_steal_sock() to make the determination of whether the socket is reference counted in the case where it is prefetched by earlier logic such as early_demux. Signed-off-by: Joe Stringer <joe@wand.net.nz> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20200329225342.16317-3-joe@wand.net.nz
118 lines
3.4 KiB
C
118 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* INET An implementation of the TCP/IP protocol suite for the LINUX
|
|
* operating system. INET is implemented using the BSD Socket
|
|
* interface as the means of communication with the user level.
|
|
*
|
|
* Authors: Lotsa people, from code originally in tcp
|
|
*/
|
|
|
|
#ifndef _INET6_HASHTABLES_H
|
|
#define _INET6_HASHTABLES_H
|
|
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
#include <linux/in6.h>
|
|
#include <linux/ipv6.h>
|
|
#include <linux/types.h>
|
|
#include <linux/jhash.h>
|
|
|
|
#include <net/inet_sock.h>
|
|
|
|
#include <net/ipv6.h>
|
|
#include <net/netns/hash.h>
|
|
|
|
struct inet_hashinfo;
|
|
|
|
static inline unsigned int __inet6_ehashfn(const u32 lhash,
|
|
const u16 lport,
|
|
const u32 fhash,
|
|
const __be16 fport,
|
|
const u32 initval)
|
|
{
|
|
const u32 ports = (((u32)lport) << 16) | (__force u32)fport;
|
|
return jhash_3words(lhash, fhash, ports, initval);
|
|
}
|
|
|
|
/*
|
|
* Sockets in TCP_CLOSE state are _always_ taken out of the hash, so
|
|
* we need not check it for TCP lookups anymore, thanks Alexey. -DaveM
|
|
*
|
|
* The sockhash lock must be held as a reader here.
|
|
*/
|
|
struct sock *__inet6_lookup_established(struct net *net,
|
|
struct inet_hashinfo *hashinfo,
|
|
const struct in6_addr *saddr,
|
|
const __be16 sport,
|
|
const struct in6_addr *daddr,
|
|
const u16 hnum, const int dif,
|
|
const int sdif);
|
|
|
|
struct sock *inet6_lookup_listener(struct net *net,
|
|
struct inet_hashinfo *hashinfo,
|
|
struct sk_buff *skb, int doff,
|
|
const struct in6_addr *saddr,
|
|
const __be16 sport,
|
|
const struct in6_addr *daddr,
|
|
const unsigned short hnum,
|
|
const int dif, const int sdif);
|
|
|
|
static inline struct sock *__inet6_lookup(struct net *net,
|
|
struct inet_hashinfo *hashinfo,
|
|
struct sk_buff *skb, int doff,
|
|
const struct in6_addr *saddr,
|
|
const __be16 sport,
|
|
const struct in6_addr *daddr,
|
|
const u16 hnum,
|
|
const int dif, const int sdif,
|
|
bool *refcounted)
|
|
{
|
|
struct sock *sk = __inet6_lookup_established(net, hashinfo, saddr,
|
|
sport, daddr, hnum,
|
|
dif, sdif);
|
|
*refcounted = true;
|
|
if (sk)
|
|
return sk;
|
|
*refcounted = false;
|
|
return inet6_lookup_listener(net, hashinfo, skb, doff, saddr, sport,
|
|
daddr, hnum, dif, sdif);
|
|
}
|
|
|
|
static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo,
|
|
struct sk_buff *skb, int doff,
|
|
const __be16 sport,
|
|
const __be16 dport,
|
|
int iif, int sdif,
|
|
bool *refcounted)
|
|
{
|
|
struct sock *sk = skb_steal_sock(skb, refcounted);
|
|
|
|
if (sk)
|
|
return sk;
|
|
|
|
return __inet6_lookup(dev_net(skb_dst(skb)->dev), hashinfo, skb,
|
|
doff, &ipv6_hdr(skb)->saddr, sport,
|
|
&ipv6_hdr(skb)->daddr, ntohs(dport),
|
|
iif, sdif, refcounted);
|
|
}
|
|
|
|
struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo,
|
|
struct sk_buff *skb, int doff,
|
|
const struct in6_addr *saddr, const __be16 sport,
|
|
const struct in6_addr *daddr, const __be16 dport,
|
|
const int dif);
|
|
|
|
int inet6_hash(struct sock *sk);
|
|
#endif /* IS_ENABLED(CONFIG_IPV6) */
|
|
|
|
#define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif, __sdif) \
|
|
(((__sk)->sk_portpair == (__ports)) && \
|
|
((__sk)->sk_family == AF_INET6) && \
|
|
ipv6_addr_equal(&(__sk)->sk_v6_daddr, (__saddr)) && \
|
|
ipv6_addr_equal(&(__sk)->sk_v6_rcv_saddr, (__daddr)) && \
|
|
(((__sk)->sk_bound_dev_if == (__dif)) || \
|
|
((__sk)->sk_bound_dev_if == (__sdif))) && \
|
|
net_eq(sock_net(__sk), (__net)))
|
|
|
|
#endif /* _INET6_HASHTABLES_H */
|