2014-08-17 09:44:42 +00:00
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/*-
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* Copyright (c) 2014 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Edward Tomasz Napierala under sponsorship
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* from the FreeBSD Foundation.
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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 AUTHOR 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 AUTHOR 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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*/
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/*-
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* Copyright (c) 1989, 1991, 1993, 1995
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Rick Macklem at The University of Guelph.
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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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* 4. 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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*/
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2014-08-21 15:07:25 +00:00
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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2014-08-17 09:44:42 +00:00
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/buf.h>
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#include <sys/conf.h>
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#include <sys/dirent.h>
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#include <sys/ioccom.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/mount.h>
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#include <sys/refcount.h>
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#include <sys/sx.h>
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#include <sys/sysctl.h>
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#include <sys/syscallsubr.h>
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#include <sys/vnode.h>
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#include <machine/atomic.h>
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#include <vm/uma.h>
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2014-08-21 15:59:25 +00:00
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#include <fs/autofs/autofs.h>
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#include <fs/autofs/autofs_ioctl.h>
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2014-08-17 09:44:42 +00:00
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MALLOC_DEFINE(M_AUTOFS, "autofs", "Automounter filesystem");
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uma_zone_t autofs_request_zone;
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uma_zone_t autofs_node_zone;
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static int autofs_open(struct cdev *dev, int flags, int fmt,
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struct thread *td);
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static int autofs_close(struct cdev *dev, int flag, int fmt,
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struct thread *td);
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static int autofs_ioctl(struct cdev *dev, u_long cmd, caddr_t arg,
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int mode, struct thread *td);
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static struct cdevsw autofs_cdevsw = {
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.d_version = D_VERSION,
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.d_open = autofs_open,
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.d_close = autofs_close,
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.d_ioctl = autofs_ioctl,
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.d_name = "autofs",
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};
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/*
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* List of signals that can interrupt an autofs trigger. Might be a good
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* idea to keep it synchronised with list in sys/fs/nfs/nfs_commonkrpc.c.
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*/
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int autofs_sig_set[] = {
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SIGINT,
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SIGTERM,
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SIGHUP,
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SIGKILL,
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SIGQUIT
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};
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2014-08-23 11:45:14 +00:00
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struct autofs_softc *autofs_softc;
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2014-08-17 09:44:42 +00:00
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SYSCTL_NODE(_vfs, OID_AUTO, autofs, CTLFLAG_RD, 0, "Automounter filesystem");
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int autofs_debug = 1;
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TUNABLE_INT("vfs.autofs.debug", &autofs_debug);
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SYSCTL_INT(_vfs_autofs, OID_AUTO, debug, CTLFLAG_RWTUN,
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&autofs_debug, 1, "Enable debug messages");
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int autofs_mount_on_stat = 0;
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TUNABLE_INT("vfs.autofs.mount_on_stat", &autofs_mount_on_stat);
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SYSCTL_INT(_vfs_autofs, OID_AUTO, mount_on_stat, CTLFLAG_RWTUN,
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&autofs_mount_on_stat, 0, "Trigger mount on stat(2) on mountpoint");
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int autofs_timeout = 30;
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TUNABLE_INT("vfs.autofs.timeout", &autofs_timeout);
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SYSCTL_INT(_vfs_autofs, OID_AUTO, timeout, CTLFLAG_RWTUN,
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&autofs_timeout, 30, "Number of seconds to wait for automountd(8)");
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int autofs_cache = 600;
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TUNABLE_INT("vfs.autofs.cache", &autofs_cache);
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SYSCTL_INT(_vfs_autofs, OID_AUTO, cache, CTLFLAG_RWTUN,
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&autofs_cache, 600, "Number of seconds to wait before reinvoking "
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"automountd(8) for any given file or directory");
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int autofs_retry_attempts = 3;
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TUNABLE_INT("vfs.autofs.retry_attempts", &autofs_retry_attempts);
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SYSCTL_INT(_vfs_autofs, OID_AUTO, retry_attempts, CTLFLAG_RWTUN,
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&autofs_retry_attempts, 3, "Number of attempts before failing mount");
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int autofs_retry_delay = 1;
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TUNABLE_INT("vfs.autofs.retry_delay", &autofs_retry_delay);
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SYSCTL_INT(_vfs_autofs, OID_AUTO, retry_delay, CTLFLAG_RWTUN,
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&autofs_retry_delay, 1, "Number of seconds before retrying");
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int autofs_interruptible = 1;
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TUNABLE_INT("vfs.autofs.interruptible", &autofs_interruptible);
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SYSCTL_INT(_vfs_autofs, OID_AUTO, interruptible, CTLFLAG_RWTUN,
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&autofs_interruptible, 1, "Allow requests to be interrupted by signal");
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int
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autofs_init(struct vfsconf *vfsp)
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{
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int error;
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2014-08-23 11:45:14 +00:00
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KASSERT(autofs_softc == NULL,
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("softc %p, should be NULL", autofs_softc));
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autofs_softc = malloc(sizeof(*autofs_softc), M_AUTOFS,
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M_WAITOK | M_ZERO);
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2014-08-17 09:44:42 +00:00
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autofs_request_zone = uma_zcreate("autofs_request",
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sizeof(struct autofs_request), NULL, NULL, NULL, NULL,
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UMA_ALIGN_PTR, 0);
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autofs_node_zone = uma_zcreate("autofs_node",
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sizeof(struct autofs_node), NULL, NULL, NULL, NULL,
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UMA_ALIGN_PTR, 0);
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2014-08-23 11:45:14 +00:00
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TAILQ_INIT(&autofs_softc->sc_requests);
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cv_init(&autofs_softc->sc_cv, "autofscv");
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sx_init(&autofs_softc->sc_lock, "autofslk");
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2014-08-17 09:44:42 +00:00
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2014-08-23 11:45:14 +00:00
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error = make_dev_p(MAKEDEV_CHECKNAME, &autofs_softc->sc_cdev,
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&autofs_cdevsw, NULL, UID_ROOT, GID_WHEEL, 0600, "autofs");
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2014-08-17 09:44:42 +00:00
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if (error != 0) {
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AUTOFS_WARN("failed to create device node, error %d", error);
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2014-08-23 11:45:14 +00:00
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uma_zdestroy(autofs_request_zone);
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uma_zdestroy(autofs_node_zone);
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free(autofs_softc, M_AUTOFS);
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2014-08-17 09:44:42 +00:00
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return (error);
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}
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2014-08-23 11:45:14 +00:00
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autofs_softc->sc_cdev->si_drv1 = autofs_softc;
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2014-08-17 09:44:42 +00:00
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return (0);
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}
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int
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autofs_uninit(struct vfsconf *vfsp)
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{
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2014-08-23 11:45:14 +00:00
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sx_xlock(&autofs_softc->sc_lock);
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if (autofs_softc->sc_dev_opened) {
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sx_xunlock(&autofs_softc->sc_lock);
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2014-08-17 09:44:42 +00:00
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return (EBUSY);
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}
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2014-08-23 11:45:14 +00:00
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if (autofs_softc->sc_cdev != NULL)
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destroy_dev(autofs_softc->sc_cdev);
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2014-08-17 09:44:42 +00:00
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uma_zdestroy(autofs_request_zone);
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uma_zdestroy(autofs_node_zone);
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2014-08-23 11:45:14 +00:00
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sx_xunlock(&autofs_softc->sc_lock);
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2014-08-17 09:44:42 +00:00
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/*
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* XXX: Race with open?
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*/
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2014-08-23 11:45:14 +00:00
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free(autofs_softc, M_AUTOFS);
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2014-08-17 09:44:42 +00:00
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return (0);
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}
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bool
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autofs_ignore_thread(const struct thread *td)
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{
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struct proc *p;
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p = td->td_proc;
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2014-08-23 11:45:14 +00:00
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if (autofs_softc->sc_dev_opened == false)
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2014-08-17 09:44:42 +00:00
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return (false);
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PROC_LOCK(p);
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2014-08-23 11:45:14 +00:00
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if (p->p_session->s_sid == autofs_softc->sc_dev_sid) {
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2014-08-17 09:44:42 +00:00
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PROC_UNLOCK(p);
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return (true);
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}
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PROC_UNLOCK(p);
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return (false);
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}
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static char *
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autofs_path(struct autofs_node *anp)
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{
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struct autofs_mount *amp;
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char *path, *tmp;
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amp = anp->an_mount;
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path = strdup("", M_AUTOFS);
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for (; anp->an_parent != NULL; anp = anp->an_parent) {
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tmp = malloc(strlen(anp->an_name) + strlen(path) + 2,
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M_AUTOFS, M_WAITOK);
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strcpy(tmp, anp->an_name);
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strcat(tmp, "/");
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strcat(tmp, path);
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free(path, M_AUTOFS);
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path = tmp;
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}
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tmp = malloc(strlen(amp->am_mountpoint) + strlen(path) + 2,
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M_AUTOFS, M_WAITOK);
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strcpy(tmp, amp->am_mountpoint);
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strcat(tmp, "/");
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strcat(tmp, path);
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free(path, M_AUTOFS);
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path = tmp;
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return (path);
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}
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static void
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autofs_callout(void *context)
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{
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struct autofs_request *ar;
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ar = context;
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2014-08-23 11:45:14 +00:00
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sx_xlock(&autofs_softc->sc_lock);
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2014-08-17 09:44:42 +00:00
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AUTOFS_WARN("request %d for %s timed out after %d seconds",
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ar->ar_id, ar->ar_path, autofs_timeout);
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/*
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* XXX: EIO perhaps?
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*/
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ar->ar_error = ETIMEDOUT;
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ar->ar_done = true;
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ar->ar_in_progress = false;
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2014-08-23 11:45:14 +00:00
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cv_broadcast(&autofs_softc->sc_cv);
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sx_xunlock(&autofs_softc->sc_lock);
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2014-08-17 09:44:42 +00:00
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}
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bool
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autofs_cached(struct autofs_node *anp, const char *component, int componentlen)
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{
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int error;
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struct autofs_mount *amp;
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amp = anp->an_mount;
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AUTOFS_ASSERT_UNLOCKED(amp);
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/*
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* For top-level nodes we need to request automountd(8)
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* assistance even if the node is marked as cached,
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* but the requested subdirectory does not exist. This
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* is necessary for wildcard indirect map keys to work.
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*/
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if (anp->an_parent == NULL && componentlen != 0) {
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AUTOFS_LOCK(amp);
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error = autofs_node_find(anp, component, componentlen, NULL);
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AUTOFS_UNLOCK(amp);
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if (error != 0)
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return (false);
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}
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return (anp->an_cached);
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}
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static void
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autofs_cache_callout(void *context)
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{
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struct autofs_node *anp;
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anp = context;
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anp->an_cached = false;
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}
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/*
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* The set/restore sigmask functions are used to (temporarily) overwrite
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* the thread td_sigmask during triggering.
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*/
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static void
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autofs_set_sigmask(sigset_t *oldset)
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{
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sigset_t newset;
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int i;
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SIGFILLSET(newset);
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/* Remove the autofs set of signals from newset */
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PROC_LOCK(curproc);
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mtx_lock(&curproc->p_sigacts->ps_mtx);
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for (i = 0 ; i < sizeof(autofs_sig_set)/sizeof(int) ; i++) {
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/*
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|
|
|
* But make sure we leave the ones already masked
|
|
|
|
* by the process, i.e. remove the signal from the
|
|
|
|
* temporary signalmask only if it wasn't already
|
|
|
|
* in p_sigmask.
|
|
|
|
*/
|
|
|
|
if (!SIGISMEMBER(curthread->td_sigmask, autofs_sig_set[i]) &&
|
|
|
|
!SIGISMEMBER(curproc->p_sigacts->ps_sigignore,
|
|
|
|
autofs_sig_set[i])) {
|
|
|
|
SIGDELSET(newset, autofs_sig_set[i]);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
mtx_unlock(&curproc->p_sigacts->ps_mtx);
|
|
|
|
kern_sigprocmask(curthread, SIG_SETMASK, &newset, oldset,
|
|
|
|
SIGPROCMASK_PROC_LOCKED);
|
|
|
|
PROC_UNLOCK(curproc);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
autofs_restore_sigmask(sigset_t *set)
|
|
|
|
{
|
|
|
|
|
|
|
|
kern_sigprocmask(curthread, SIG_SETMASK, set, NULL, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
autofs_trigger_one(struct autofs_node *anp,
|
|
|
|
const char *component, int componentlen)
|
|
|
|
{
|
|
|
|
sigset_t oldset;
|
|
|
|
struct autofs_mount *amp;
|
|
|
|
struct autofs_node *firstanp;
|
|
|
|
struct autofs_request *ar;
|
|
|
|
char *key, *path;
|
|
|
|
int error = 0, request_error, last;
|
|
|
|
|
|
|
|
amp = VFSTOAUTOFS(anp->an_vnode->v_mount);
|
|
|
|
|
2014-08-23 11:45:14 +00:00
|
|
|
sx_assert(&autofs_softc->sc_lock, SA_XLOCKED);
|
2014-08-17 09:44:42 +00:00
|
|
|
|
|
|
|
if (anp->an_parent == NULL) {
|
|
|
|
key = strndup(component, componentlen, M_AUTOFS);
|
|
|
|
} else {
|
|
|
|
for (firstanp = anp; firstanp->an_parent->an_parent != NULL;
|
|
|
|
firstanp = firstanp->an_parent)
|
|
|
|
continue;
|
|
|
|
key = strdup(firstanp->an_name, M_AUTOFS);
|
|
|
|
}
|
|
|
|
|
|
|
|
path = autofs_path(anp);
|
|
|
|
|
2014-08-23 11:45:14 +00:00
|
|
|
TAILQ_FOREACH(ar, &autofs_softc->sc_requests, ar_next) {
|
2014-08-17 09:44:42 +00:00
|
|
|
if (strcmp(ar->ar_path, path) != 0)
|
|
|
|
continue;
|
|
|
|
if (strcmp(ar->ar_key, key) != 0)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
KASSERT(strcmp(ar->ar_from, amp->am_from) == 0,
|
|
|
|
("from changed; %s != %s", ar->ar_from, amp->am_from));
|
|
|
|
KASSERT(strcmp(ar->ar_prefix, amp->am_prefix) == 0,
|
|
|
|
("prefix changed; %s != %s",
|
|
|
|
ar->ar_prefix, amp->am_prefix));
|
|
|
|
KASSERT(strcmp(ar->ar_options, amp->am_options) == 0,
|
|
|
|
("options changed; %s != %s",
|
|
|
|
ar->ar_options, amp->am_options));
|
|
|
|
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ar != NULL) {
|
|
|
|
refcount_acquire(&ar->ar_refcount);
|
|
|
|
} else {
|
|
|
|
ar = uma_zalloc(autofs_request_zone, M_WAITOK | M_ZERO);
|
|
|
|
ar->ar_mount = amp;
|
|
|
|
|
2014-08-23 11:45:14 +00:00
|
|
|
ar->ar_id =
|
|
|
|
atomic_fetchadd_int(&autofs_softc->sc_last_request_id, 1);
|
2014-08-17 09:44:42 +00:00
|
|
|
strlcpy(ar->ar_from, amp->am_from, sizeof(ar->ar_from));
|
|
|
|
strlcpy(ar->ar_path, path, sizeof(ar->ar_path));
|
|
|
|
strlcpy(ar->ar_prefix, amp->am_prefix, sizeof(ar->ar_prefix));
|
|
|
|
strlcpy(ar->ar_key, key, sizeof(ar->ar_key));
|
|
|
|
strlcpy(ar->ar_options,
|
|
|
|
amp->am_options, sizeof(ar->ar_options));
|
|
|
|
|
|
|
|
callout_init(&ar->ar_callout, 1);
|
|
|
|
callout_reset(&ar->ar_callout,
|
|
|
|
autofs_timeout * hz, autofs_callout, ar);
|
|
|
|
refcount_init(&ar->ar_refcount, 1);
|
2014-08-23 11:45:14 +00:00
|
|
|
TAILQ_INSERT_TAIL(&autofs_softc->sc_requests, ar, ar_next);
|
2014-08-17 09:44:42 +00:00
|
|
|
}
|
|
|
|
|
2014-08-23 11:45:14 +00:00
|
|
|
cv_broadcast(&autofs_softc->sc_cv);
|
2014-08-17 09:44:42 +00:00
|
|
|
while (ar->ar_done == false) {
|
|
|
|
if (autofs_interruptible != 0) {
|
|
|
|
autofs_set_sigmask(&oldset);
|
2014-08-23 11:45:14 +00:00
|
|
|
error = cv_wait_sig(&autofs_softc->sc_cv,
|
|
|
|
&autofs_softc->sc_lock);
|
2014-08-17 09:44:42 +00:00
|
|
|
autofs_restore_sigmask(&oldset);
|
|
|
|
if (error != 0) {
|
|
|
|
/*
|
2014-09-18 10:33:23 +00:00
|
|
|
* XXX: For some reason this returns -1
|
2014-08-17 09:44:42 +00:00
|
|
|
* instead of EINTR, wtf?!
|
|
|
|
*/
|
|
|
|
error = EINTR;
|
|
|
|
AUTOFS_WARN("cv_wait_sig for %s failed "
|
|
|
|
"with error %d", ar->ar_path, error);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
} else {
|
2014-08-23 11:45:14 +00:00
|
|
|
cv_wait(&autofs_softc->sc_cv, &autofs_softc->sc_lock);
|
2014-08-17 09:44:42 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
request_error = ar->ar_error;
|
|
|
|
if (request_error != 0) {
|
|
|
|
AUTOFS_WARN("request for %s completed with error %d",
|
|
|
|
ar->ar_path, request_error);
|
|
|
|
}
|
|
|
|
|
|
|
|
last = refcount_release(&ar->ar_refcount);
|
|
|
|
if (last) {
|
2014-08-23 11:45:14 +00:00
|
|
|
TAILQ_REMOVE(&autofs_softc->sc_requests, ar, ar_next);
|
2014-08-17 09:44:42 +00:00
|
|
|
/*
|
|
|
|
* XXX: Is it safe?
|
|
|
|
*/
|
2014-08-23 11:45:14 +00:00
|
|
|
sx_xunlock(&autofs_softc->sc_lock);
|
2014-08-17 09:44:42 +00:00
|
|
|
callout_drain(&ar->ar_callout);
|
2014-08-23 11:45:14 +00:00
|
|
|
sx_xlock(&autofs_softc->sc_lock);
|
2014-08-17 09:44:42 +00:00
|
|
|
uma_zfree(autofs_request_zone, ar);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Note that we do not do negative caching on purpose. This
|
|
|
|
* way the user can retry access at any time, e.g. after fixing
|
|
|
|
* the failure reason, without waiting for cache timer to expire.
|
|
|
|
*/
|
|
|
|
if (error == 0 && request_error == 0 && autofs_cache > 0) {
|
|
|
|
anp->an_cached = true;
|
|
|
|
callout_reset(&anp->an_callout, autofs_cache * hz,
|
|
|
|
autofs_cache_callout, anp);
|
|
|
|
}
|
|
|
|
|
|
|
|
free(key, M_AUTOFS);
|
|
|
|
free(path, M_AUTOFS);
|
|
|
|
|
|
|
|
if (error != 0)
|
|
|
|
return (error);
|
|
|
|
return (request_error);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Send request to automountd(8) and wait for completion.
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
autofs_trigger(struct autofs_node *anp,
|
|
|
|
const char *component, int componentlen)
|
|
|
|
{
|
|
|
|
int error;
|
|
|
|
|
|
|
|
for (;;) {
|
|
|
|
error = autofs_trigger_one(anp, component, componentlen);
|
|
|
|
if (error == 0) {
|
|
|
|
anp->an_retries = 0;
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
if (error == EINTR) {
|
|
|
|
AUTOFS_DEBUG("trigger interrupted by signal, "
|
|
|
|
"not retrying");
|
|
|
|
anp->an_retries = 0;
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
anp->an_retries++;
|
|
|
|
if (anp->an_retries >= autofs_retry_attempts) {
|
|
|
|
AUTOFS_DEBUG("trigger failed %d times; returning "
|
|
|
|
"error %d", anp->an_retries, error);
|
|
|
|
anp->an_retries = 0;
|
|
|
|
return (error);
|
|
|
|
|
|
|
|
}
|
|
|
|
AUTOFS_DEBUG("trigger failed with error %d; will retry in "
|
|
|
|
"%d seconds, %d attempts left", error, autofs_retry_delay,
|
|
|
|
autofs_retry_attempts - anp->an_retries);
|
2014-08-23 11:45:14 +00:00
|
|
|
sx_xunlock(&autofs_softc->sc_lock);
|
2014-08-17 09:44:42 +00:00
|
|
|
pause("autofs_retry", autofs_retry_delay * hz);
|
2014-08-23 11:45:14 +00:00
|
|
|
sx_xlock(&autofs_softc->sc_lock);
|
2014-08-17 09:44:42 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2014-08-23 11:45:14 +00:00
|
|
|
autofs_ioctl_request(struct autofs_daemon_request *adr)
|
2014-08-17 09:44:42 +00:00
|
|
|
{
|
|
|
|
struct autofs_request *ar;
|
|
|
|
int error;
|
|
|
|
|
2014-08-23 11:45:14 +00:00
|
|
|
sx_xlock(&autofs_softc->sc_lock);
|
2014-08-17 09:44:42 +00:00
|
|
|
for (;;) {
|
2014-08-23 11:45:14 +00:00
|
|
|
TAILQ_FOREACH(ar, &autofs_softc->sc_requests, ar_next) {
|
2014-08-17 09:44:42 +00:00
|
|
|
if (ar->ar_done)
|
|
|
|
continue;
|
|
|
|
if (ar->ar_in_progress)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ar != NULL)
|
|
|
|
break;
|
|
|
|
|
2014-08-23 11:45:14 +00:00
|
|
|
error = cv_wait_sig(&autofs_softc->sc_cv,
|
|
|
|
&autofs_softc->sc_lock);
|
2014-08-17 09:44:42 +00:00
|
|
|
if (error != 0) {
|
|
|
|
/*
|
2014-09-18 10:33:23 +00:00
|
|
|
* XXX: For some reason this returns -1 instead
|
2014-08-17 09:44:42 +00:00
|
|
|
* of EINTR, wtf?!
|
|
|
|
*/
|
|
|
|
error = EINTR;
|
2014-08-23 11:45:14 +00:00
|
|
|
sx_xunlock(&autofs_softc->sc_lock);
|
2014-08-17 09:44:42 +00:00
|
|
|
AUTOFS_DEBUG("failed with error %d", error);
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
ar->ar_in_progress = true;
|
2014-08-23 11:45:14 +00:00
|
|
|
sx_xunlock(&autofs_softc->sc_lock);
|
2014-08-17 09:44:42 +00:00
|
|
|
|
|
|
|
adr->adr_id = ar->ar_id;
|
|
|
|
strlcpy(adr->adr_from, ar->ar_from, sizeof(adr->adr_from));
|
|
|
|
strlcpy(adr->adr_path, ar->ar_path, sizeof(adr->adr_path));
|
|
|
|
strlcpy(adr->adr_prefix, ar->ar_prefix, sizeof(adr->adr_prefix));
|
|
|
|
strlcpy(adr->adr_key, ar->ar_key, sizeof(adr->adr_key));
|
|
|
|
strlcpy(adr->adr_options, ar->ar_options, sizeof(adr->adr_options));
|
|
|
|
|
|
|
|
PROC_LOCK(curproc);
|
2014-08-23 11:45:14 +00:00
|
|
|
autofs_softc->sc_dev_sid = curproc->p_session->s_sid;
|
2014-08-17 09:44:42 +00:00
|
|
|
PROC_UNLOCK(curproc);
|
|
|
|
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2014-08-23 11:45:14 +00:00
|
|
|
autofs_ioctl_done(struct autofs_daemon_done *add)
|
2014-08-17 09:44:42 +00:00
|
|
|
{
|
|
|
|
struct autofs_request *ar;
|
|
|
|
|
2014-08-23 11:45:14 +00:00
|
|
|
sx_xlock(&autofs_softc->sc_lock);
|
|
|
|
TAILQ_FOREACH(ar, &autofs_softc->sc_requests, ar_next) {
|
2014-08-17 09:44:42 +00:00
|
|
|
if (ar->ar_id == add->add_id)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ar == NULL) {
|
2014-08-23 11:45:14 +00:00
|
|
|
sx_xunlock(&autofs_softc->sc_lock);
|
2014-08-17 09:44:42 +00:00
|
|
|
AUTOFS_DEBUG("id %d not found", add->add_id);
|
|
|
|
return (ESRCH);
|
|
|
|
}
|
|
|
|
|
|
|
|
ar->ar_error = add->add_error;
|
|
|
|
ar->ar_done = true;
|
|
|
|
ar->ar_in_progress = false;
|
2014-08-23 11:45:14 +00:00
|
|
|
cv_broadcast(&autofs_softc->sc_cv);
|
2014-08-17 09:44:42 +00:00
|
|
|
|
2014-08-23 11:45:14 +00:00
|
|
|
sx_xunlock(&autofs_softc->sc_lock);
|
2014-08-17 09:44:42 +00:00
|
|
|
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
autofs_open(struct cdev *dev, int flags, int fmt, struct thread *td)
|
|
|
|
{
|
|
|
|
|
2014-08-23 11:45:14 +00:00
|
|
|
sx_xlock(&autofs_softc->sc_lock);
|
2014-08-23 11:38:31 +00:00
|
|
|
/*
|
|
|
|
* We must never block automountd(8) and its descendants, and we use
|
|
|
|
* session ID to determine that: we store session id of the process
|
|
|
|
* that opened the device, and then compare it with session ids
|
|
|
|
* of triggering processes. This means running a second automountd(8)
|
|
|
|
* instance would break the previous one. The check below prevents
|
|
|
|
* it from happening.
|
|
|
|
*/
|
2014-08-23 11:45:14 +00:00
|
|
|
if (autofs_softc->sc_dev_opened) {
|
|
|
|
sx_xunlock(&autofs_softc->sc_lock);
|
2014-08-17 09:44:42 +00:00
|
|
|
return (EBUSY);
|
|
|
|
}
|
|
|
|
|
2014-08-23 11:45:14 +00:00
|
|
|
autofs_softc->sc_dev_opened = true;
|
|
|
|
sx_xunlock(&autofs_softc->sc_lock);
|
2014-08-17 09:44:42 +00:00
|
|
|
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
autofs_close(struct cdev *dev, int flag, int fmt, struct thread *td)
|
|
|
|
{
|
|
|
|
|
2014-08-23 11:45:14 +00:00
|
|
|
sx_xlock(&autofs_softc->sc_lock);
|
|
|
|
KASSERT(autofs_softc->sc_dev_opened, ("not opened?"));
|
|
|
|
autofs_softc->sc_dev_opened = false;
|
|
|
|
sx_xunlock(&autofs_softc->sc_lock);
|
2014-08-17 09:44:42 +00:00
|
|
|
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
autofs_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, int mode,
|
|
|
|
struct thread *td)
|
|
|
|
{
|
|
|
|
|
2014-08-23 11:45:14 +00:00
|
|
|
KASSERT(autofs_softc->sc_dev_opened, ("not opened?"));
|
2014-08-17 09:44:42 +00:00
|
|
|
|
|
|
|
switch (cmd) {
|
|
|
|
case AUTOFSREQUEST:
|
2014-08-23 11:45:14 +00:00
|
|
|
return (autofs_ioctl_request(
|
2014-08-17 09:44:42 +00:00
|
|
|
(struct autofs_daemon_request *)arg));
|
|
|
|
case AUTOFSDONE:
|
2014-08-23 11:45:14 +00:00
|
|
|
return (autofs_ioctl_done(
|
2014-08-17 09:44:42 +00:00
|
|
|
(struct autofs_daemon_done *)arg));
|
|
|
|
default:
|
|
|
|
AUTOFS_DEBUG("invalid cmd %lx", cmd);
|
|
|
|
return (EINVAL);
|
|
|
|
}
|
|
|
|
}
|