diff options
| author | Matthieu Baerts (NGI0) <matttbe@kernel.org> | 2024-07-27 12:01:24 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-08-11 12:58:02 +0200 |
| commit | 73e2baa301ee3f62ff971e68877adeb37f98cc67 (patch) | |
| tree | 99efc3e10fe82ddef301cda949d7cb75a9533804 /net/mptcp/protocol.h | |
| parent | a702415f3a161f013a78cedc16f45cc729df940e (diff) | |
mptcp: distinguish rcv vs sent backup flag in requests
commit efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 upstream.
When sending an MP_JOIN + SYN + ACK, it is possible to mark the subflow
as 'backup' by setting the flag with the same name. Before this patch,
the backup was set if the other peer set it in its MP_JOIN + SYN
request.
It is not correct: the backup flag should be set in the MPJ+SYN+ACK only
if the host asks for it, and not mirroring what was done by the other
peer. It is then required to have a dedicated bit for each direction,
similar to what is done in the subflow context.
Fixes: f296234c98a8 ("mptcp: Add handling of incoming MP_JOIN requests")
Cc: stable@vger.kernel.org
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/mptcp/protocol.h')
| -rw-r--r-- | net/mptcp/protocol.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index 7aa47e2dd52b..bd7fe1db21a0 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -443,6 +443,7 @@ struct mptcp_subflow_request_sock { u16 mp_capable : 1, mp_join : 1, backup : 1, + request_bkup : 1, csum_reqd : 1, allow_join_id0 : 1; u8 local_id; |