diff options
| author | Geliang Tang <geliang.tang@suse.com> | 2022-04-27 00:57:14 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-04-27 12:45:54 +0300 |
| commit | 9c81be0dbc89ccb76ce34c3a88425bf3a0d57ebb (patch) | |
| tree | b621f259c152b69feda0ae214ed3b0ea3f401b2b /net/mptcp/pm.c | |
| parent | 4293248c6704b854bf816aa1967e433402bee11c (diff) | |
| download | linux-9c81be0dbc89ccb76ce34c3a88425bf3a0d57ebb.tar.xz | |
mptcp: add MP_FAIL response support
This patch adds a new struct member mp_fail_response_expect in struct
mptcp_subflow_context to support MP_FAIL response. In the single subflow
with checksum error and contiguous data special case, a MP_FAIL is sent
in response to another MP_FAIL.
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mptcp/pm.c')
| -rw-r--r-- | net/mptcp/pm.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c index 5c36870d3420..971e843a304c 100644 --- a/net/mptcp/pm.c +++ b/net/mptcp/pm.c @@ -290,8 +290,16 @@ void mptcp_pm_mp_fail_received(struct sock *sk, u64 fail_seq) pr_debug("fail_seq=%llu", fail_seq); - if (!mptcp_has_another_subflow(sk) && READ_ONCE(msk->allow_infinite_fallback)) + if (mptcp_has_another_subflow(sk) || !READ_ONCE(msk->allow_infinite_fallback)) + return; + + if (!READ_ONCE(subflow->mp_fail_response_expect)) { + pr_debug("send MP_FAIL response and infinite map"); + + subflow->send_mp_fail = 1; + MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPFAILTX); subflow->send_infinite_map = 1; + } } /* path manager helpers */ |