2a54322c7b
read/write/accept, then the expectation is that the blocked thread will exit and the close complete. Since only one fd is affected, but many fd can refer to the same file, the close code can only request the fs code unblock with ERESTART. Fixed for pipes and sockets, ERESTART will only be generated after such a close - so there should be no change for other programs. Also rename fo_abort() to fo_restart() (this used to be fo_drain()). Fixes PR/26567
268 lines
6.9 KiB
C
268 lines
6.9 KiB
C
/* $NetBSD: sys_socket.c,v 1.63 2009/12/20 09:36:06 dsl Exp $ */
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/*-
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* Copyright (c) 2008, 2009 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Andrew Doran.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1982, 1986, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)sys_socket.c 8.3 (Berkeley) 2/14/95
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: sys_socket.c,v 1.63 2009/12/20 09:36:06 dsl Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/systm.h>
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#include <sys/file.h>
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#include <sys/mbuf.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/poll.h>
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#include <sys/proc.h>
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#include <sys/kauth.h>
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#include <net/if.h>
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#include <net/route.h>
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const struct fileops socketops = {
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.fo_read = soo_read,
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.fo_write = soo_write,
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.fo_ioctl = soo_ioctl,
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.fo_fcntl = soo_fcntl,
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.fo_poll = soo_poll,
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.fo_stat = soo_stat,
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.fo_close = soo_close,
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.fo_kqfilter = soo_kqfilter,
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.fo_restart = soo_restart,
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};
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/* ARGSUSED */
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int
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soo_read(file_t *fp, off_t *offset, struct uio *uio, kauth_cred_t cred,
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int flags)
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{
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struct socket *so = fp->f_data;
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int error;
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error = (*so->so_receive)(so, (struct mbuf **)0,
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uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0);
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return error;
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}
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/* ARGSUSED */
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int
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soo_write(file_t *fp, off_t *offset, struct uio *uio, kauth_cred_t cred,
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int flags)
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{
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struct socket *so = fp->f_data;
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int error;
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error = (*so->so_send)(so, (struct mbuf *)0,
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uio, (struct mbuf *)0, (struct mbuf *)0, 0, curlwp);
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return error;
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}
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int
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soo_ioctl(file_t *fp, u_long cmd, void *data)
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{
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struct socket *so = fp->f_data;
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int error = 0;
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switch (cmd) {
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case FIONBIO:
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/* No reason to lock and this call is made very often. */
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so->so_nbio = *(int *)data;
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break;
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case FIOASYNC:
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solock(so);
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if (*(int *)data) {
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so->so_state |= SS_ASYNC;
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so->so_rcv.sb_flags |= SB_ASYNC;
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so->so_snd.sb_flags |= SB_ASYNC;
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} else {
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so->so_state &= ~SS_ASYNC;
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so->so_rcv.sb_flags &= ~SB_ASYNC;
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so->so_snd.sb_flags &= ~SB_ASYNC;
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}
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sounlock(so);
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break;
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case FIONREAD:
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*(int *)data = so->so_rcv.sb_cc;
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break;
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case FIONWRITE:
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*(int *)data = so->so_snd.sb_cc;
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break;
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case FIONSPACE:
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/*
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* See the comment around sbspace()'s definition
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* in sys/socketvar.h in face of counts about maximum
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* to understand the following test. We detect overflow
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* and return zero.
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*/
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solock(so);
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if ((so->so_snd.sb_hiwat < so->so_snd.sb_cc)
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|| (so->so_snd.sb_mbmax < so->so_snd.sb_mbcnt))
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*(int *)data = 0;
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else
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*(int *)data = sbspace(&so->so_snd);
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sounlock(so);
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break;
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case SIOCSPGRP:
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case FIOSETOWN:
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case TIOCSPGRP:
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error = fsetown(&so->so_pgid, cmd, data);
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break;
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case SIOCGPGRP:
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case FIOGETOWN:
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case TIOCGPGRP:
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error = fgetown(so->so_pgid, cmd, data);
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break;
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case SIOCATMARK:
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*(int *)data = (so->so_state&SS_RCVATMARK) != 0;
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break;
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default:
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/*
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* Interface/routing/protocol specific ioctls:
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* interface and routing ioctls should have a
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* different entry since a socket's unnecessary
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*/
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KERNEL_LOCK(1, NULL);
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if (IOCGROUP(cmd) == 'i')
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error = ifioctl(so, cmd, data, curlwp);
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else if (IOCGROUP(cmd) == 'r')
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error = rtioctl(cmd, data, curlwp);
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else {
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error = (*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
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(struct mbuf *)cmd, (struct mbuf *)data, NULL,
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curlwp);
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}
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KERNEL_UNLOCK_ONE(NULL);
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break;
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}
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return error;
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}
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int
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soo_fcntl(file_t *fp, u_int cmd, void *data)
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{
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if (cmd == F_SETFL)
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return 0;
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else
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return EOPNOTSUPP;
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}
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int
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soo_poll(file_t *fp, int events)
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{
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return sopoll(fp->f_data, events);
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}
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int
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soo_stat(file_t *fp, struct stat *ub)
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{
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struct socket *so = fp->f_data;
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int error;
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memset((void *)ub, 0, sizeof(*ub));
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ub->st_mode = S_IFSOCK;
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solock(so);
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error = (*so->so_proto->pr_usrreq)(so, PRU_SENSE,
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(struct mbuf *)ub, (struct mbuf *)0, (struct mbuf *)0,
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curlwp);
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sounlock(so);
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return error;
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}
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/* ARGSUSED */
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int
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soo_close(file_t *fp)
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{
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int error = 0;
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if (fp->f_data)
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error = soclose(fp->f_data);
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fp->f_data = 0;
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return error;
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}
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void
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soo_restart(file_t *fp)
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{
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sorestart(fp->f_data);
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}
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