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net: remove duplicate sk_lookup helpers 

Now that inet[6]_lookup_reuseport are parameterised on the ehashfn
we can remove two sk_lookup helpers.

Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/r/20230720-so-reuseport-v6-6-7021b683cdae@isovalent.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
This commit is contained in:
Lorenz Bauer 2023-07-20 17:30:10 +02:00 committed by Martin KaFai Lau
parent 2a61776366
commit 6c886db2e7
6 changed files with 55 additions and 84 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
include/net/inet6_hashtables.h
View File

@ -73,6 +73,15 @@ struct sock *inet6_lookup_listener(struct net *net,
const unsigned short hnum,
const int dif, const int sdif);
struct sock *inet6_lookup_run_sk_lookup(struct net *net,
int protocol,
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,
inet6_ehashfn_t *ehashfn);
static inline struct sock *__inet6_lookup(struct net *net,
struct inet_hashinfo *hashinfo,
struct sk_buff *skb, int doff,

7
include/net/inet_hashtables.h
View File

@ -393,6 +393,13 @@ struct sock *inet_lookup_reuseport(struct net *net, struct sock *sk,
__be32 daddr, unsigned short hnum,
inet_ehashfn_t *ehashfn);
struct sock *inet_lookup_run_sk_lookup(struct net *net,
int protocol,
struct sk_buff *skb, int doff,
__be32 saddr, __be16 sport,
__be32 daddr, u16 hnum, const int dif,
inet_ehashfn_t *ehashfn);
static inline struct sock *
inet_lookup_established(struct net *net, struct inet_hashinfo *hashinfo,
const __be32 saddr, const __be16 sport,

26
net/ipv4/inet_hashtables.c
View File

@ -403,25 +403,23 @@ static struct sock *inet_lhash2_lookup(struct net *net,
return result;
}
static inline struct sock *inet_lookup_run_bpf(struct net *net,
struct inet_hashinfo *hashinfo,
struct sk_buff *skb, int doff,
__be32 saddr, __be16 sport,
__be32 daddr, u16 hnum, const int dif)
struct sock *inet_lookup_run_sk_lookup(struct net *net,
int protocol,
struct sk_buff *skb, int doff,
__be32 saddr, __be16 sport,
__be32 daddr, u16 hnum, const int dif,
inet_ehashfn_t *ehashfn)
{
struct sock *sk, *reuse_sk;
bool no_reuseport;
if (hashinfo != net->ipv4.tcp_death_row.hashinfo)
return NULL; /* only TCP is supported */
no_reuseport = bpf_sk_lookup_run_v4(net, IPPROTO_TCP, saddr, sport,
no_reuseport = bpf_sk_lookup_run_v4(net, protocol, saddr, sport,
daddr, hnum, dif, &sk);
if (no_reuseport || IS_ERR_OR_NULL(sk))
return sk;
reuse_sk = inet_lookup_reuseport(net, sk, skb, doff, saddr, sport, daddr, hnum,
inet_ehashfn);
ehashfn);
if (reuse_sk)
sk = reuse_sk;
return sk;
@ -439,9 +437,11 @@ struct sock *__inet_lookup_listener(struct net *net,
unsigned int hash2;
/* Lookup redirect from BPF */
if (static_branch_unlikely(&bpf_sk_lookup_enabled)) {
result = inet_lookup_run_bpf(net, hashinfo, skb, doff,
saddr, sport, daddr, hnum, dif);
if (static_branch_unlikely(&bpf_sk_lookup_enabled) &&
hashinfo == net->ipv4.tcp_death_row.hashinfo) {
result = inet_lookup_run_sk_lookup(net, IPPROTO_TCP, skb, doff,
saddr, sport, daddr, hnum, dif,
inet_ehashfn);
if (result)
goto done;
}

32
net/ipv4/udp.c
View File

@ -465,30 +465,6 @@ static struct sock *udp4_lib_lookup2(struct net *net,
return result;
}
static struct sock *udp4_lookup_run_bpf(struct net *net,
struct udp_table *udptable,
struct sk_buff *skb,
__be32 saddr, __be16 sport,
__be32 daddr, u16 hnum, const int dif)
{
struct sock *sk, *reuse_sk;
bool no_reuseport;
if (udptable != net->ipv4.udp_table)
return NULL; /* only UDP is supported */
no_reuseport = bpf_sk_lookup_run_v4(net, IPPROTO_UDP, saddr, sport,
daddr, hnum, dif, &sk);
if (no_reuseport || IS_ERR_OR_NULL(sk))
return sk;
reuse_sk = inet_lookup_reuseport(net, sk, skb, sizeof(struct udphdr),
saddr, sport, daddr, hnum, udp_ehashfn);
if (reuse_sk)
sk = reuse_sk;
return sk;
}
/* UDP is nearly always wildcards out the wazoo, it makes no sense to try
* harder than this. -DaveM
*/
@ -513,9 +489,11 @@ struct sock *__udp4_lib_lookup(struct net *net, __be32 saddr,
goto done;
/* Lookup redirect from BPF */
if (static_branch_unlikely(&bpf_sk_lookup_enabled)) {
sk = udp4_lookup_run_bpf(net, udptable, skb,
saddr, sport, daddr, hnum, dif);
if (static_branch_unlikely(&bpf_sk_lookup_enabled) &&
udptable == net->ipv4.udp_table) {
sk = inet_lookup_run_sk_lookup(net, IPPROTO_UDP, skb, sizeof(struct udphdr),
saddr, sport, daddr, hnum, dif,
udp_ehashfn);
if (sk) {
result = sk;
goto done;

31
net/ipv6/inet6_hashtables.c
View File

@ -177,31 +177,30 @@ static struct sock *inet6_lhash2_lookup(struct net *net,
return result;
}
static inline struct sock *inet6_lookup_run_bpf(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)
struct sock *inet6_lookup_run_sk_lookup(struct net *net,
int protocol,
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,
inet6_ehashfn_t *ehashfn)
{
struct sock *sk, *reuse_sk;
bool no_reuseport;
if (hashinfo != net->ipv4.tcp_death_row.hashinfo)
return NULL; /* only TCP is supported */
no_reuseport = bpf_sk_lookup_run_v6(net, IPPROTO_TCP, saddr, sport,
no_reuseport = bpf_sk_lookup_run_v6(net, protocol, saddr, sport,
daddr, hnum, dif, &sk);
if (no_reuseport || IS_ERR_OR_NULL(sk))
return sk;
reuse_sk = inet6_lookup_reuseport(net, sk, skb, doff,
saddr, sport, daddr, hnum, inet6_ehashfn);
saddr, sport, daddr, hnum, ehashfn);
if (reuse_sk)
sk = reuse_sk;
return sk;
}
EXPORT_SYMBOL_GPL(inet6_lookup_run_sk_lookup);
struct sock *inet6_lookup_listener(struct net *net,
struct inet_hashinfo *hashinfo,
@ -215,9 +214,11 @@ struct sock *inet6_lookup_listener(struct net *net,
unsigned int hash2;
/* Lookup redirect from BPF */
if (static_branch_unlikely(&bpf_sk_lookup_enabled)) {
result = inet6_lookup_run_bpf(net, hashinfo, skb, doff,
saddr, sport, daddr, hnum, dif);
if (static_branch_unlikely(&bpf_sk_lookup_enabled) &&
hashinfo == net->ipv4.tcp_death_row.hashinfo) {
result = inet6_lookup_run_sk_lookup(net, IPPROTO_TCP, skb, doff,
saddr, sport, daddr, hnum, dif,
inet6_ehashfn);
if (result)
goto done;
}

34
net/ipv6/udp.c
View File

@ -206,32 +206,6 @@ static struct sock *udp6_lib_lookup2(struct net *net,
return result;
}
static inline struct sock *udp6_lookup_run_bpf(struct net *net,
struct udp_table *udptable,
struct sk_buff *skb,
const struct in6_addr *saddr,
__be16 sport,
const struct in6_addr *daddr,
u16 hnum, const int dif)
{
struct sock *sk, *reuse_sk;
bool no_reuseport;
if (udptable != net->ipv4.udp_table)
return NULL; /* only UDP is supported */
no_reuseport = bpf_sk_lookup_run_v6(net, IPPROTO_UDP, saddr, sport,
daddr, hnum, dif, &sk);
if (no_reuseport || IS_ERR_OR_NULL(sk))
return sk;
reuse_sk = inet6_lookup_reuseport(net, sk, skb, sizeof(struct udphdr),
saddr, sport, daddr, hnum, udp6_ehashfn);
if (reuse_sk)
sk = reuse_sk;
return sk;
}
/* rcu_read_lock() must be held */
struct sock *__udp6_lib_lookup(struct net *net,
const struct in6_addr *saddr, __be16 sport,
@ -256,9 +230,11 @@ struct sock *__udp6_lib_lookup(struct net *net,
goto done;
/* Lookup redirect from BPF */
if (static_branch_unlikely(&bpf_sk_lookup_enabled)) {
sk = udp6_lookup_run_bpf(net, udptable, skb,
saddr, sport, daddr, hnum, dif);
if (static_branch_unlikely(&bpf_sk_lookup_enabled) &&
udptable == net->ipv4.udp_table) {
sk = inet6_lookup_run_sk_lookup(net, IPPROTO_UDP, skb, sizeof(struct udphdr),
saddr, sport, daddr, hnum, dif,
udp6_ehashfn);
if (sk) {
result = sk;
goto done;