cda91d5b91
As David Laight noticed, "In a multithreaded program it is reasonable to have a thread blocked in accept(). With TCP a subsequent shutdown(listen_fd, SHUT_RDWR) causes the accept to fail. But nothing happens for SCTP." sctp_disconnect() is eventually called when shutdown a listen socket, but nothing is done in this function. This patch sets RCV_SHUTDOWN flag in sk->sk_shutdown there, and adds the check (sk->sk_shutdown & RCV_SHUTDOWN) to break and return in sctp_accept(). Note that shutdown() is only supported on TCP-style SCTP socket. Reported-by: David Laight <David.Laight@aculab.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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 reStructuredText 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.