diff options
author | Paolo Abeni <pabeni@redhat.com> | 2020-05-15 19:22:15 +0200 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2020-05-15 12:30:13 -0700 |
commit | 90bf45134d55d626ae2713cac50cda10c6c8b0c2 (patch) | |
tree | 03acba9e0f9f038350654ad942bca2dfafe2d970 /include/net/inet_connection_sock.h | |
parent | ca1c933bcee9393d8a83c6be1093471e0c3b655d (diff) |
mptcp: add new sock flag to deal with join subflows
MP_JOIN subflows must not land into the accept queue.
Currently tcp_check_req() calls an mptcp specific helper
to detect such scenario.
Such helper leverages the subflow context to check for
MP_JOIN subflows. We need to deal also with MP JOIN
failures, even when the subflow context is not available
due allocation failure.
A possible solution would be changing the syn_recv_sock()
signature to allow returning a more descriptive action/
error code and deal with that in tcp_check_req().
Since the above need is MPTCP specific, this patch instead
uses a TCP request socket hole to add a MPTCP specific flag.
Such flag is used by the MPTCP syn_recv_sock() to tell
tcp_check_req() how to deal with the request socket.
This change is a no-op for !MPTCP build, and makes the
MPTCP code simpler. It allows also the next patch to deal
correctly with MP JOIN failure.
v1 -> v2:
- be more conservative on drop_req initialization (Mat)
RFC -> v1:
- move the drop_req bit inside tcp_request_sock (Eric)
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Reviewed-by: Christoph Paasch <cpaasch@apple.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/inet_connection_sock.h')
0 files changed, 0 insertions, 0 deletions