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First, add cork and nodelay fields to the mptcp_sock structure so they can be used in sync_socket_options(), and fill them on setsockopt while holding the msk socket lock. Then, on setsockopt set proper tcp_sk(ssk)->nonagle values for subflows by calling __tcp_sock_set_cork() or __tcp_sock_set_nodelay() on the ssk while holding the ssk socket lock. tcp_push_pending_frames() will be invoked on the ssk if a cork was cleared or nodelay was set. Also set MPTCP_PUSH_PENDING bit by calling mptcp_check_and_set_pending(). This will lead to __mptcp_push_pending() being called inside mptcp_release_cb() with new tcp_sk(ssk)->nonagle. Also add getsockopt support for TCP_CORK and TCP_NODELAY. Acked-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Maxim Galaganov <max@internet.ru> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.