diff options
| author | Gang Yan <yangang@kylinos.cn> | 2024-10-21 17:14:04 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-10-28 15:55:45 -0700 |
| commit | 581c8cbfa934aaa555daa4e843242fcecc160f05 (patch) | |
| tree | 464e4a9cebda2782bf34c240c8a239483578ca9d /net/mptcp/protocol.c | |
| parent | a42f3076648e0b507de9039f8085edcc10b35fb7 (diff) | |
mptcp: annotate data-races around subflow->fully_established
We introduce the same handling for potential data races with the
'fully_established' flag in subflow as previously done for
msk->fully_established.
Additionally, we make a crucial change: convert the subflow's
'fully_established' from 'bit_field' to 'bool' type. This is
necessary because methods for avoiding data races don't work well
with 'bit_field'. Specifically, the 'READ_ONCE' needs to know
the size of the variable being accessed, which is not supported in
'bit_field'. Also, 'test_bit' expect the address of 'bit_field'.
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/516
Signed-off-by: Gang Yan <yangang@kylinos.cn>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20241021-net-next-mptcp-misc-6-13-v1-2-1ef02746504a@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/mptcp/protocol.c')
| -rw-r--r-- | net/mptcp/protocol.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 1f5c63eb21f0..a6c9661a4c45 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -3511,7 +3511,7 @@ static void schedule_3rdack_retransmission(struct sock *ssk) struct tcp_sock *tp = tcp_sk(ssk); unsigned long timeout; - if (mptcp_subflow_ctx(ssk)->fully_established) + if (READ_ONCE(mptcp_subflow_ctx(ssk)->fully_established)) return; /* reschedule with a timeout above RTT, as we must look only for drop */ |