diff options
| author | Eric Dumazet <edumazet@google.com> | 2025-03-01 20:14:23 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-03-03 15:44:19 -0800 |
| commit | 5282de17621f80a1e2c6c26229975182ecade5b9 (patch) | |
| tree | b013b216f2abe4f892673641d7bd2738f88a1a46 | |
| parent | 9b49f57ccd3aa1560f215b3f8218b2783ff18391 (diff) | |
tcp: remove READ_ONCE(req->ts_recent)
After commit 8d52da23b6c6 ("tcp: Defer ts_recent changes
until req is owned"), req->ts_recent is not changed anymore.
It is set once in tcp_openreq_init(), bpf_sk_assign_tcp_reqsk()
or cookie_tcp_reqsk_alloc() before the req can be seen by other
cpus/threads.
This completes the revert of eba20811f326 ("tcp: annotate
data-races around tcp_rsk(req)->ts_recent").
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Wang Hai <wanghai38@huawei.com>
Reviewed-by: Jason Xing <kerneljasonxing@gmail.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://patch.msgid.link/20250301201424.2046477-6-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | net/ipv4/tcp_ipv4.c | 2 | ||||
| -rw-r--r-- | net/ipv4/tcp_minisocks.c | 4 | ||||
| -rw-r--r-- | net/ipv4/tcp_output.c | 2 | ||||
| -rw-r--r-- | net/ipv6/tcp_ipv6.c | 2 |
4 files changed, 5 insertions, 5 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index ae07613e4f33..d9405b012dff 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -1155,7 +1155,7 @@ static void tcp_v4_reqsk_send_ack(const struct sock *sk, struct sk_buff *skb, tcp_rsk(req)->rcv_nxt, tcp_synack_window(req) >> inet_rsk(req)->rcv_wscale, tcp_rsk_tsval(tcp_rsk(req)), - READ_ONCE(req->ts_recent), + req->ts_recent, 0, &key, inet_rsk(req)->no_srccheck ? IP_REPLY_ARG_NOSRCCHECK : 0, ip_hdr(skb)->tos, diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c index ba4a5d7f251d..3cb8f281186b 100644 --- a/net/ipv4/tcp_minisocks.c +++ b/net/ipv4/tcp_minisocks.c @@ -585,7 +585,7 @@ struct sock *tcp_create_openreq_child(const struct sock *sk, if (newtp->rx_opt.tstamp_ok) { newtp->tcp_usec_ts = treq->req_usec_ts; - newtp->rx_opt.ts_recent = READ_ONCE(req->ts_recent); + newtp->rx_opt.ts_recent = req->ts_recent; newtp->rx_opt.ts_recent_stamp = ktime_get_seconds(); newtp->tcp_header_len = sizeof(struct tcphdr) + TCPOLEN_TSTAMP_ALIGNED; } else { @@ -673,7 +673,7 @@ struct sock *tcp_check_req(struct sock *sk, struct sk_buff *skb, tcp_parse_options(sock_net(sk), skb, &tmp_opt, 0, NULL); if (tmp_opt.saw_tstamp) { - tmp_opt.ts_recent = READ_ONCE(req->ts_recent); + tmp_opt.ts_recent = req->ts_recent; if (tmp_opt.rcv_tsecr) { if (inet_rsk(req)->tstamp_ok && !fastopen) tsecr_reject = !between(tmp_opt.rcv_tsecr, diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index 0a660075add5..24e56bf96747 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -949,7 +949,7 @@ static unsigned int tcp_synack_options(const struct sock *sk, tcp_rsk(req)->snt_tsval_first = opts->tsval; } WRITE_ONCE(tcp_rsk(req)->snt_tsval_last, opts->tsval); - opts->tsecr = READ_ONCE(req->ts_recent); + opts->tsecr = req->ts_recent; remaining -= TCPOLEN_TSTAMP_ALIGNED; } if (likely(ireq->sack_ok)) { diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index fe75ad8e606c..85c4820bfe15 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -1279,7 +1279,7 @@ static void tcp_v6_reqsk_send_ack(const struct sock *sk, struct sk_buff *skb, tcp_rsk(req)->rcv_nxt, tcp_synack_window(req) >> inet_rsk(req)->rcv_wscale, tcp_rsk_tsval(tcp_rsk(req)), - READ_ONCE(req->ts_recent), sk->sk_bound_dev_if, + req->ts_recent, sk->sk_bound_dev_if, &key, ipv6_get_dsfield(ipv6_hdr(skb)), 0, READ_ONCE(sk->sk_priority), READ_ONCE(tcp_rsk(req)->txhash)); |