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Diffstat (limited to 'net/ipv6/inet6_hashtables.c')
-rw-r--r--net/ipv6/inet6_hashtables.c66
1 files changed, 57 insertions, 9 deletions
diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c
index fbe9d4295eac..2d3add9e6116 100644
--- a/net/ipv6/inet6_hashtables.c
+++ b/net/ipv6/inet6_hashtables.c
@@ -21,6 +21,8 @@
#include <net/ip.h>
#include <net/sock_reuseport.h>
+extern struct inet_hashinfo tcp_hashinfo;
+
u32 inet6_ehashfn(const struct net *net,
const struct in6_addr *laddr, const u16 lport,
const struct in6_addr *faddr, const __be16 fport)
@@ -111,6 +113,23 @@ static inline int compute_score(struct sock *sk, struct net *net,
return score;
}
+static inline struct sock *lookup_reuseport(struct net *net, struct sock *sk,
+ struct sk_buff *skb, int doff,
+ const struct in6_addr *saddr,
+ __be16 sport,
+ const struct in6_addr *daddr,
+ unsigned short hnum)
+{
+ struct sock *reuse_sk = NULL;
+ u32 phash;
+
+ if (sk->sk_reuseport) {
+ phash = inet6_ehashfn(net, daddr, hnum, saddr, sport);
+ reuse_sk = reuseport_select_sock(sk, phash, skb, doff);
+ }
+ return reuse_sk;
+}
+
/* called with rcu_read_lock() */
static struct sock *inet6_lhash2_lookup(struct net *net,
struct inet_listen_hashbucket *ilb2,
@@ -123,21 +142,17 @@ static struct sock *inet6_lhash2_lookup(struct net *net,
struct inet_connection_sock *icsk;
struct sock *sk, *result = NULL;
int score, hiscore = 0;
- u32 phash = 0;
inet_lhash2_for_each_icsk_rcu(icsk, &ilb2->head) {
sk = (struct sock *)icsk;
score = compute_score(sk, net, hnum, daddr, dif, sdif,
exact_dif);
if (score > hiscore) {
- if (sk->sk_reuseport) {
- phash = inet6_ehashfn(net, daddr, hnum,
- saddr, sport);
- result = reuseport_select_sock(sk, phash,
- skb, doff);
- if (result)
- return result;
- }
+ result = lookup_reuseport(net, sk, skb, doff,
+ saddr, sport, daddr, hnum);
+ if (result)
+ return result;
+
result = sk;
hiscore = score;
}
@@ -146,6 +161,31 @@ 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)
+{
+ struct sock *sk, *reuse_sk;
+ bool no_reuseport;
+
+ if (hashinfo != &tcp_hashinfo)
+ return NULL; /* only TCP is supported */
+
+ no_reuseport = bpf_sk_lookup_run_v6(net, IPPROTO_TCP,
+ saddr, sport, daddr, hnum, &sk);
+ if (no_reuseport || IS_ERR_OR_NULL(sk))
+ return sk;
+
+ reuse_sk = lookup_reuseport(net, sk, skb, doff, saddr, sport, daddr, hnum);
+ if (reuse_sk)
+ sk = reuse_sk;
+ return sk;
+}
+
struct sock *inet6_lookup_listener(struct net *net,
struct inet_hashinfo *hashinfo,
struct sk_buff *skb, int doff,
@@ -157,6 +197,14 @@ struct sock *inet6_lookup_listener(struct net *net,
struct sock *result = NULL;
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);
+ if (result)
+ goto done;
+ }
+
hash2 = ipv6_portaddr_hash(net, daddr, hnum);
ilb2 = inet_lhash2_bucket(hashinfo, hash2);