Date: Sat, 6 Jul 2013 14:21:22 +0000 (UTC) From: Jilles Tjoelker <jilles@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r252887 - stable/9/sys/kern Message-ID: <201307061421.r66ELMAw090108@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: jilles Date: Sat Jul 6 14:21:22 2013 New Revision: 252887 URL: http://svnweb.freebsd.org/changeset/base/252887 Log: MFC r250102: socket: Make shutdown() wake up a blocked accept(). A blocking accept (and some other operations) waits on &so->so_timeo. Once it wakes up, it will detect the SBS_CANTRCVMORE bit. The error from accept() is [ECONNABORTED] which is not the nicest one -- the thread calling accept() needs to know out-of-band what is happening. A spurious wakeup on so->so_timeo appears harmless (sleep retried) except when lingering on close (SO_LINGER, and in that case there is no descriptor to call shutdown() on) so this should be fairly safe. A shutdown() already woke up a blocked accept() for TCP sockets, but not for Unix domain sockets. This fix is generic for all domains. This patch was sent to -hackers@ and -net@ on April 5. Modified: stable/9/sys/kern/uipc_socket.c Directory Properties: stable/9/sys/ (props changed) Modified: stable/9/sys/kern/uipc_socket.c ============================================================================== --- stable/9/sys/kern/uipc_socket.c Sat Jul 6 12:56:30 2013 (r252886) +++ stable/9/sys/kern/uipc_socket.c Sat Jul 6 14:21:22 2013 (r252887) @@ -2339,9 +2339,11 @@ soshutdown(struct socket *so, int how) sorflush(so); if (how != SHUT_RD) { error = (*pr->pr_usrreqs->pru_shutdown)(so); + wakeup(&so->so_timeo); CURVNET_RESTORE(); return (error); } + wakeup(&so->so_timeo); CURVNET_RESTORE(); return (0); }
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201307061421.r66ELMAw090108>