From: Eric Dumazet <edumazet@google.com>
Date: Wed, 7 Jun 2017 10:34:36 -0700
Subject: tcp: add a struct net parameter to tcp_parse_options()
Patch-mainline: v4.13-rc1
Git-commit: eed29f17f09ad7f400bc245f209acad6a8214fac
References: bsc#1046543
We want to move some TCP sysctls to net namespaces in the future.
tcp_window_scaling, tcp_sack and tcp_timestamps being fetched
from tcp_parse_options(), we need to pass an extra parameter.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/infiniband/hw/cxgb4/cm.c | 2 +-
include/net/tcp.h | 2 +-
net/ipv4/syncookies.c | 2 +-
net/ipv4/tcp_input.c | 18 +++++++++++-------
net/ipv4/tcp_minisocks.c | 4 ++--
net/ipv6/syncookies.c | 2 +-
6 files changed, 17 insertions(+), 13 deletions(-)
--- a/drivers/infiniband/hw/cxgb4/cm.c
+++ b/drivers/infiniband/hw/cxgb4/cm.c
@@ -3756,7 +3756,7 @@ static void build_cpl_pass_accept_req(st
*/
memset(&tmp_opt, 0, sizeof(tmp_opt));
tcp_clear_options(&tmp_opt);
- tcp_parse_options(skb, &tmp_opt, 0, NULL);
+ tcp_parse_options(&init_net, skb, &tmp_opt, 0, NULL);
req = (struct cpl_pass_accept_req *)__skb_push(skb, sizeof(*req));
memset(req, 0, sizeof(*req));
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -427,7 +427,7 @@ void tcp_set_keepalive(struct sock *sk,
void tcp_syn_ack_timeout(const struct request_sock *req);
int tcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int nonblock,
int flags, int *addr_len);
-void tcp_parse_options(const struct sk_buff *skb,
+void tcp_parse_options(const struct net *net, const struct sk_buff *skb,
struct tcp_options_received *opt_rx,
int estab, struct tcp_fastopen_cookie *foc);
const u8 *tcp_parse_md5sig_option(const struct tcphdr *th);
--- a/net/ipv4/syncookies.c
+++ b/net/ipv4/syncookies.c
@@ -312,7 +312,7 @@ struct sock *cookie_v4_check(struct sock
/* check for timestamp cookie support */
memset(&tcp_opt, 0, sizeof(tcp_opt));
- tcp_parse_options(skb, &tcp_opt, 0, NULL);
+ tcp_parse_options(sock_net(sk), skb, &tcp_opt, 0, NULL);
if (tcp_opt.saw_tstamp && tcp_opt.rcv_tsecr) {
tsoff = secure_tcp_ts_off(ip_hdr(skb)->daddr, ip_hdr(skb)->saddr);
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -3717,7 +3717,8 @@ static void tcp_parse_fastopen_option(in
* But, this can also be called on packets in the established flow when
* the fast version below fails.
*/
-void tcp_parse_options(const struct sk_buff *skb,
+void tcp_parse_options(const struct net *net,
+ const struct sk_buff *skb,
struct tcp_options_received *opt_rx, int estab,
struct tcp_fastopen_cookie *foc)
{
@@ -3851,7 +3852,8 @@ static bool tcp_parse_aligned_timestamp(
/* Fast parse options. This hopes to only see timestamps.
* If it is wrong it falls back on tcp_parse_options().
*/
-static bool tcp_fast_parse_options(const struct sk_buff *skb,
+static bool tcp_fast_parse_options(const struct net *net,
+ const struct sk_buff *skb,
const struct tcphdr *th, struct tcp_sock *tp)
{
/* In the spirit of fast parsing, compare doff directly to constant
@@ -3866,7 +3868,7 @@ static bool tcp_fast_parse_options(const
return true;
}
- tcp_parse_options(skb, &tp->rx_opt, 1, NULL);
+ tcp_parse_options(net, skb, &tp->rx_opt, 1, NULL);
if (tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr)
tp->rx_opt.rcv_tsecr -= tp->tsoffset;
@@ -5227,7 +5229,8 @@ static bool tcp_validate_incoming(struct
bool rst_seq_match = false;
/* RFC1323: H1. Apply PAWS check first. */
- if (tcp_fast_parse_options(skb, th, tp) && tp->rx_opt.saw_tstamp &&
+ if (tcp_fast_parse_options(sock_net(sk), skb, th, tp) &&
+ tp->rx_opt.saw_tstamp &&
tcp_paws_discard(sk, skb)) {
if (!th->rst) {
NET_INC_STATS(sock_net(sk), LINUX_MIB_PAWSESTABREJECTED);
@@ -5598,7 +5601,7 @@ static bool tcp_rcv_fastopen_synack(stru
/* Get original SYNACK MSS value if user MSS sets mss_clamp */
tcp_clear_options(&opt);
opt.user_mss = opt.mss_clamp = 0;
- tcp_parse_options(synack, &opt, 0, NULL);
+ tcp_parse_options(sock_net(sk), synack, &opt, 0, NULL);
mss = opt.mss_clamp;
}
@@ -5652,7 +5655,7 @@ static int tcp_rcv_synsent_state_process
int saved_clamp = tp->rx_opt.mss_clamp;
bool fastopen_fail;
- tcp_parse_options(skb, &tp->rx_opt, 0, &foc);
+ tcp_parse_options(sock_net(sk), skb, &tp->rx_opt, 0, &foc);
if (tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr)
tp->rx_opt.rcv_tsecr -= tp->tsoffset;
@@ -6329,7 +6332,8 @@ int tcp_conn_request(struct request_sock
tcp_clear_options(&tmp_opt);
tmp_opt.mss_clamp = af_ops->mss_clamp;
tmp_opt.user_mss = tp->rx_opt.user_mss;
- tcp_parse_options(skb, &tmp_opt, 0, want_cookie ? NULL : &foc);
+ tcp_parse_options(sock_net(sk), skb, &tmp_opt, 0,
+ want_cookie ? NULL : &foc);
if (want_cookie && !tmp_opt.saw_tstamp)
tcp_clear_options(&tmp_opt);
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -98,7 +98,7 @@ tcp_timewait_state_process(struct inet_t
tmp_opt.saw_tstamp = 0;
if (th->doff > (sizeof(*th) >> 2) && tcptw->tw_ts_recent_stamp) {
- tcp_parse_options(skb, &tmp_opt, 0, NULL);
+ tcp_parse_options(twsk_net(tw), skb, &tmp_opt, 0, NULL);
if (tmp_opt.saw_tstamp) {
if (tmp_opt.rcv_tsecr)
@@ -559,7 +559,7 @@ struct sock *tcp_check_req(struct sock *
tmp_opt.saw_tstamp = 0;
if (th->doff > (sizeof(struct tcphdr)>>2)) {
- tcp_parse_options(skb, &tmp_opt, 0, NULL);
+ tcp_parse_options(sock_net(sk), skb, &tmp_opt, 0, NULL);
if (tmp_opt.saw_tstamp) {
tmp_opt.ts_recent = req->ts_recent;
--- a/net/ipv6/syncookies.c
+++ b/net/ipv6/syncookies.c
@@ -162,7 +162,7 @@ struct sock *cookie_v6_check(struct sock
/* check for timestamp cookie support */
memset(&tcp_opt, 0, sizeof(tcp_opt));
- tcp_parse_options(skb, &tcp_opt, 0, NULL);
+ tcp_parse_options(sock_net(sk), skb, &tcp_opt, 0, NULL);
if (tcp_opt.saw_tstamp && tcp_opt.rcv_tsecr) {
tsoff = secure_tcpv6_ts_off(ipv6_hdr(skb)->daddr.s6_addr32,