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Message-ID: <20231013220433.70792-3-kuniyu@amazon.com>
Date: Fri, 13 Oct 2023 15:04:24 -0700
From: Kuniyuki Iwashima <kuniyu@...zon.com>
To: "David S. Miller" <davem@...emloft.net>, Eric Dumazet
<edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
<pabeni@...hat.com>, David Ahern <dsahern@...nel.org>, Alexei Starovoitov
<ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, Andrii Nakryiko
<andrii@...nel.org>, Martin KaFai Lau <martin.lau@...ux.dev>, Song Liu
<song@...nel.org>, Yonghong Song <yonghong.song@...ux.dev>, John Fastabend
<john.fastabend@...il.com>, KP Singh <kpsingh@...nel.org>, Stanislav Fomichev
<sdf@...gle.com>, Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
Mykola Lysenko <mykolal@...com>
CC: Kuniyuki Iwashima <kuniyu@...zon.com>, Kuniyuki Iwashima
<kuni1840@...il.com>, <bpf@...r.kernel.org>, <netdev@...r.kernel.org>
Subject: [PATCH v1 bpf-next 02/11] tcp: Cache sock_net(sk) in cookie_v[46]_check().
sock_net(sk) is used repeatedly in cookie_v[46]_check().
Let's cache it in a variable.
Signed-off-by: Kuniyuki Iwashima <kuniyu@...zon.com>
---
net/ipv4/syncookies.c | 19 ++++++++++---------
net/ipv6/syncookies.c | 17 +++++++++--------
2 files changed, 19 insertions(+), 17 deletions(-)
diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c
index 174eaddc28b5..64280cf42667 100644
--- a/net/ipv4/syncookies.c
+++ b/net/ipv4/syncookies.c
@@ -330,6 +330,7 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb)
struct tcp_options_received tcp_opt;
struct tcp_sock *tp = tcp_sk(sk);
struct inet_request_sock *ireq;
+ struct net *net = sock_net(sk);
struct tcp_request_sock *treq;
struct request_sock *req;
struct sock *ret = sk;
@@ -339,7 +340,7 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb)
__u8 rcv_wscale;
u32 tsoff = 0;
- if (!READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_syncookies) ||
+ if (!READ_ONCE(net->ipv4.sysctl_tcp_syncookies) ||
!th->ack || th->rst)
goto out;
@@ -348,24 +349,24 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb)
mss = __cookie_v4_check(ip_hdr(skb), th, cookie);
if (mss == 0) {
- __NET_INC_STATS(sock_net(sk), LINUX_MIB_SYNCOOKIESFAILED);
+ __NET_INC_STATS(net, LINUX_MIB_SYNCOOKIESFAILED);
goto out;
}
- __NET_INC_STATS(sock_net(sk), LINUX_MIB_SYNCOOKIESRECV);
+ __NET_INC_STATS(net, LINUX_MIB_SYNCOOKIESRECV);
/* check for timestamp cookie support */
memset(&tcp_opt, 0, sizeof(tcp_opt));
- tcp_parse_options(sock_net(sk), skb, &tcp_opt, 0, NULL);
+ tcp_parse_options(net, skb, &tcp_opt, 0, NULL);
if (tcp_opt.saw_tstamp && tcp_opt.rcv_tsecr) {
- tsoff = secure_tcp_ts_off(sock_net(sk),
+ tsoff = secure_tcp_ts_off(net,
ip_hdr(skb)->daddr,
ip_hdr(skb)->saddr);
tcp_opt.rcv_tsecr -= tsoff;
}
- if (!cookie_timestamp_decode(sock_net(sk), &tcp_opt))
+ if (!cookie_timestamp_decode(net, &tcp_opt))
goto out;
ret = NULL;
@@ -402,7 +403,7 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb)
/* We throwed the options of the initial SYN away, so we hope
* the ACK carries the same options again (see RFC1122 4.2.3.8)
*/
- RCU_INIT_POINTER(ireq->ireq_opt, tcp_v4_save_options(sock_net(sk), skb));
+ RCU_INIT_POINTER(ireq->ireq_opt, tcp_v4_save_options(net, skb));
if (security_inet_conn_request(sk, skb, req)) {
reqsk_free(req);
@@ -423,7 +424,7 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb)
opt->srr ? opt->faddr : ireq->ir_rmt_addr,
ireq->ir_loc_addr, th->source, th->dest, sk->sk_uid);
security_req_classify_flow(req, flowi4_to_flowi_common(&fl4));
- rt = ip_route_output_key(sock_net(sk), &fl4);
+ rt = ip_route_output_key(net, &fl4);
if (IS_ERR(rt)) {
reqsk_free(req);
goto out;
@@ -443,7 +444,7 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb)
dst_metric(&rt->dst, RTAX_INITRWND));
ireq->rcv_wscale = rcv_wscale;
- ireq->ecn_ok = cookie_ecn_ok(&tcp_opt, sock_net(sk), &rt->dst);
+ ireq->ecn_ok = cookie_ecn_ok(&tcp_opt, net, &rt->dst);
ret = tcp_get_cookie_sock(sk, skb, req, &rt->dst, tsoff);
/* ip_queue_xmit() depends on our flow being setup
diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c
index 894d5ae312d1..cbee2df8a006 100644
--- a/net/ipv6/syncookies.c
+++ b/net/ipv6/syncookies.c
@@ -133,6 +133,7 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
struct tcp_options_received tcp_opt;
struct tcp_sock *tp = tcp_sk(sk);
struct inet_request_sock *ireq;
+ struct net *net = sock_net(sk);
struct tcp_request_sock *treq;
struct request_sock *req;
struct dst_entry *dst;
@@ -141,7 +142,7 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
__u8 rcv_wscale;
u32 tsoff = 0;
- if (!READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_syncookies) ||
+ if (!READ_ONCE(net->ipv4.sysctl_tcp_syncookies) ||
!th->ack || th->rst)
goto out;
@@ -150,24 +151,24 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
mss = __cookie_v6_check(ipv6_hdr(skb), th, cookie);
if (mss == 0) {
- __NET_INC_STATS(sock_net(sk), LINUX_MIB_SYNCOOKIESFAILED);
+ __NET_INC_STATS(net, LINUX_MIB_SYNCOOKIESFAILED);
goto out;
}
- __NET_INC_STATS(sock_net(sk), LINUX_MIB_SYNCOOKIESRECV);
+ __NET_INC_STATS(net, LINUX_MIB_SYNCOOKIESRECV);
/* check for timestamp cookie support */
memset(&tcp_opt, 0, sizeof(tcp_opt));
- tcp_parse_options(sock_net(sk), skb, &tcp_opt, 0, NULL);
+ tcp_parse_options(net, skb, &tcp_opt, 0, NULL);
if (tcp_opt.saw_tstamp && tcp_opt.rcv_tsecr) {
- tsoff = secure_tcpv6_ts_off(sock_net(sk),
+ tsoff = secure_tcpv6_ts_off(net,
ipv6_hdr(skb)->daddr.s6_addr32,
ipv6_hdr(skb)->saddr.s6_addr32);
tcp_opt.rcv_tsecr -= tsoff;
}
- if (!cookie_timestamp_decode(sock_net(sk), &tcp_opt))
+ if (!cookie_timestamp_decode(net, &tcp_opt))
goto out;
ret = NULL;
@@ -237,7 +238,7 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
fl6.flowi6_uid = sk->sk_uid;
security_req_classify_flow(req, flowi6_to_flowi_common(&fl6));
- dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p);
+ dst = ip6_dst_lookup_flow(net, sk, &fl6, final_p);
if (IS_ERR(dst))
goto out_free;
}
@@ -255,7 +256,7 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
dst_metric(dst, RTAX_INITRWND));
ireq->rcv_wscale = rcv_wscale;
- ireq->ecn_ok = cookie_ecn_ok(&tcp_opt, sock_net(sk), dst);
+ ireq->ecn_ok = cookie_ecn_ok(&tcp_opt, net, dst);
ret = tcp_get_cookie_sock(sk, skb, req, dst, tsoff);
out:
--
2.30.2
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