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[ Upstream commit13d7f46386] TCP transmission with MSG_ZEROCOPY fails if the peer closes its end of the connection and so transitions this socket to CLOSE_WAIT state. Transmission in close wait state is acceptable. Other similar tests in the stack (e.g., in FastOpen) accept both states. Relax this test, too. Link: https://www.mail-archive.com/netdev@vger.kernel.org/msg276886.html Link: https://www.mail-archive.com/netdev@vger.kernel.org/msg227390.html Fixes:f214f915e7("tcp: enable MSG_ZEROCOPY") Reported-by: Marek Majkowski <marek@cloudflare.com> Signed-off-by: Willem de Bruijn <willemb@google.com> CC: Yuchung Cheng <ycheng@google.com> CC: Neal Cardwell <ncardwell@google.com> CC: Soheil Hassas Yeganeh <soheil@google.com> CC: Alexey Kodanev <alexey.kodanev@oracle.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.