diff options
| author | Geliang Tang <geliang.tang@suse.com> | 2022-04-22 14:55:39 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-04-23 11:51:05 +0100 |
| commit | 1e39e5a32ad7fdd82d6e071aa14ecd511eedc1f7 (patch) | |
| tree | 43ea9946d71f5d469772114d960f1f4e529f88f2 /net/mptcp/pm.c | |
| parent | 0530020a7c8f2204e784f0dbdc882bbd961fdbde (diff) | |
mptcp: infinite mapping sending
This patch adds the infinite mapping sending logic.
Add a new flag send_infinite_map in struct mptcp_subflow_context. Set
it true when a single contiguous subflow is in use and the
allow_infinite_fallback flag is true in mptcp_pm_mp_fail_received().
In mptcp_sendmsg_frag(), if this flag is true, call the new function
mptcp_update_infinite_map() to set the infinite mapping.
Add a new flag infinite_map in struct mptcp_ext, set it true in
mptcp_update_infinite_map(), and check this flag in a new helper
mptcp_check_infinite_map().
In mptcp_update_infinite_map(), set data_len to 0, and clear the
send_infinite_map flag, then do fallback.
In mptcp_established_options(), use the helper mptcp_check_infinite_map()
to let the infinite mapping DSS can be sent out in the fallback mode.
Suggested-by: Paolo Abeni <pabeni@redhat.com>
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 | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c index 8aa0cdb7ad46..5c36870d3420 100644 --- a/net/mptcp/pm.c +++ b/net/mptcp/pm.c @@ -285,7 +285,13 @@ void mptcp_pm_mp_prio_received(struct sock *ssk, u8 bkup) void mptcp_pm_mp_fail_received(struct sock *sk, u64 fail_seq) { + struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk); + struct mptcp_sock *msk = mptcp_sk(subflow->conn); + pr_debug("fail_seq=%llu", fail_seq); + + if (!mptcp_has_another_subflow(sk) && READ_ONCE(msk->allow_infinite_fallback)) + subflow->send_infinite_map = 1; } /* path manager helpers */ |