13914ddf8SEdward Tomasz Napierala /*- 23914ddf8SEdward Tomasz Napierala * Copyright (c) 2014 The FreeBSD Foundation 33914ddf8SEdward Tomasz Napierala * All rights reserved. 43914ddf8SEdward Tomasz Napierala * 53914ddf8SEdward Tomasz Napierala * This software was developed by Edward Tomasz Napierala under sponsorship 63914ddf8SEdward Tomasz Napierala * from the FreeBSD Foundation. 73914ddf8SEdward Tomasz Napierala * 83914ddf8SEdward Tomasz Napierala * Redistribution and use in source and binary forms, with or without 93914ddf8SEdward Tomasz Napierala * modification, are permitted provided that the following conditions 103914ddf8SEdward Tomasz Napierala * are met: 113914ddf8SEdward Tomasz Napierala * 1. Redistributions of source code must retain the above copyright 123914ddf8SEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer. 133914ddf8SEdward Tomasz Napierala * 2. Redistributions in binary form must reproduce the above copyright 143914ddf8SEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer in the 153914ddf8SEdward Tomasz Napierala * documentation and/or other materials provided with the distribution. 163914ddf8SEdward Tomasz Napierala * 173914ddf8SEdward Tomasz Napierala * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 183914ddf8SEdward Tomasz Napierala * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 193914ddf8SEdward Tomasz Napierala * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 203914ddf8SEdward Tomasz Napierala * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 213914ddf8SEdward Tomasz Napierala * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 223914ddf8SEdward Tomasz Napierala * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 233914ddf8SEdward Tomasz Napierala * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 243914ddf8SEdward Tomasz Napierala * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 253914ddf8SEdward Tomasz Napierala * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 263914ddf8SEdward Tomasz Napierala * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 273914ddf8SEdward Tomasz Napierala * SUCH DAMAGE. 283914ddf8SEdward Tomasz Napierala * 293914ddf8SEdward Tomasz Napierala */ 303914ddf8SEdward Tomasz Napierala /*- 313914ddf8SEdward Tomasz Napierala * Copyright (c) 1989, 1991, 1993, 1995 323914ddf8SEdward Tomasz Napierala * The Regents of the University of California. All rights reserved. 333914ddf8SEdward Tomasz Napierala * 343914ddf8SEdward Tomasz Napierala * This code is derived from software contributed to Berkeley by 353914ddf8SEdward Tomasz Napierala * Rick Macklem at The University of Guelph. 363914ddf8SEdward Tomasz Napierala * 373914ddf8SEdward Tomasz Napierala * Redistribution and use in source and binary forms, with or without 383914ddf8SEdward Tomasz Napierala * modification, are permitted provided that the following conditions 393914ddf8SEdward Tomasz Napierala * are met: 403914ddf8SEdward Tomasz Napierala * 1. Redistributions of source code must retain the above copyright 413914ddf8SEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer. 423914ddf8SEdward Tomasz Napierala * 2. Redistributions in binary form must reproduce the above copyright 433914ddf8SEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer in the 443914ddf8SEdward Tomasz Napierala * documentation and/or other materials provided with the distribution. 453914ddf8SEdward Tomasz Napierala * 4. Neither the name of the University nor the names of its contributors 463914ddf8SEdward Tomasz Napierala * may be used to endorse or promote products derived from this software 473914ddf8SEdward Tomasz Napierala * without specific prior written permission. 483914ddf8SEdward Tomasz Napierala * 493914ddf8SEdward Tomasz Napierala * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 503914ddf8SEdward Tomasz Napierala * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 513914ddf8SEdward Tomasz Napierala * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 523914ddf8SEdward Tomasz Napierala * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 533914ddf8SEdward Tomasz Napierala * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 543914ddf8SEdward Tomasz Napierala * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 553914ddf8SEdward Tomasz Napierala * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 563914ddf8SEdward Tomasz Napierala * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 573914ddf8SEdward Tomasz Napierala * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 583914ddf8SEdward Tomasz Napierala * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 593914ddf8SEdward Tomasz Napierala * SUCH DAMAGE. 603914ddf8SEdward Tomasz Napierala * 613914ddf8SEdward Tomasz Napierala */ 623914ddf8SEdward Tomasz Napierala 63925fd945SEdward Tomasz Napierala #include <sys/cdefs.h> 64925fd945SEdward Tomasz Napierala __FBSDID("$FreeBSD$"); 65925fd945SEdward Tomasz Napierala 663914ddf8SEdward Tomasz Napierala #include <sys/param.h> 673914ddf8SEdward Tomasz Napierala #include <sys/systm.h> 683914ddf8SEdward Tomasz Napierala #include <sys/buf.h> 693914ddf8SEdward Tomasz Napierala #include <sys/conf.h> 703914ddf8SEdward Tomasz Napierala #include <sys/dirent.h> 713914ddf8SEdward Tomasz Napierala #include <sys/ioccom.h> 723914ddf8SEdward Tomasz Napierala #include <sys/kernel.h> 733914ddf8SEdward Tomasz Napierala #include <sys/module.h> 743914ddf8SEdward Tomasz Napierala #include <sys/mount.h> 753914ddf8SEdward Tomasz Napierala #include <sys/refcount.h> 763914ddf8SEdward Tomasz Napierala #include <sys/sx.h> 773914ddf8SEdward Tomasz Napierala #include <sys/sysctl.h> 783914ddf8SEdward Tomasz Napierala #include <sys/syscallsubr.h> 79759489f9SEdward Tomasz Napierala #include <sys/taskqueue.h> 803914ddf8SEdward Tomasz Napierala #include <sys/vnode.h> 813914ddf8SEdward Tomasz Napierala #include <machine/atomic.h> 823914ddf8SEdward Tomasz Napierala #include <vm/uma.h> 833914ddf8SEdward Tomasz Napierala 84f5440d1aSEdward Tomasz Napierala #include <fs/autofs/autofs.h> 85f5440d1aSEdward Tomasz Napierala #include <fs/autofs/autofs_ioctl.h> 863914ddf8SEdward Tomasz Napierala 873914ddf8SEdward Tomasz Napierala MALLOC_DEFINE(M_AUTOFS, "autofs", "Automounter filesystem"); 883914ddf8SEdward Tomasz Napierala 893914ddf8SEdward Tomasz Napierala uma_zone_t autofs_request_zone; 903914ddf8SEdward Tomasz Napierala uma_zone_t autofs_node_zone; 913914ddf8SEdward Tomasz Napierala 923914ddf8SEdward Tomasz Napierala static int autofs_open(struct cdev *dev, int flags, int fmt, 933914ddf8SEdward Tomasz Napierala struct thread *td); 943914ddf8SEdward Tomasz Napierala static int autofs_close(struct cdev *dev, int flag, int fmt, 953914ddf8SEdward Tomasz Napierala struct thread *td); 963914ddf8SEdward Tomasz Napierala static int autofs_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, 973914ddf8SEdward Tomasz Napierala int mode, struct thread *td); 983914ddf8SEdward Tomasz Napierala 993914ddf8SEdward Tomasz Napierala static struct cdevsw autofs_cdevsw = { 1003914ddf8SEdward Tomasz Napierala .d_version = D_VERSION, 1013914ddf8SEdward Tomasz Napierala .d_open = autofs_open, 1023914ddf8SEdward Tomasz Napierala .d_close = autofs_close, 1033914ddf8SEdward Tomasz Napierala .d_ioctl = autofs_ioctl, 1043914ddf8SEdward Tomasz Napierala .d_name = "autofs", 1053914ddf8SEdward Tomasz Napierala }; 1063914ddf8SEdward Tomasz Napierala 1073914ddf8SEdward Tomasz Napierala /* 1083914ddf8SEdward Tomasz Napierala * List of signals that can interrupt an autofs trigger. Might be a good 1093914ddf8SEdward Tomasz Napierala * idea to keep it synchronised with list in sys/fs/nfs/nfs_commonkrpc.c. 1103914ddf8SEdward Tomasz Napierala */ 1113914ddf8SEdward Tomasz Napierala int autofs_sig_set[] = { 1123914ddf8SEdward Tomasz Napierala SIGINT, 1133914ddf8SEdward Tomasz Napierala SIGTERM, 1143914ddf8SEdward Tomasz Napierala SIGHUP, 1153914ddf8SEdward Tomasz Napierala SIGKILL, 1163914ddf8SEdward Tomasz Napierala SIGQUIT 1173914ddf8SEdward Tomasz Napierala }; 1183914ddf8SEdward Tomasz Napierala 119f81018caSEdward Tomasz Napierala struct autofs_softc *autofs_softc; 1203914ddf8SEdward Tomasz Napierala 1213914ddf8SEdward Tomasz Napierala SYSCTL_NODE(_vfs, OID_AUTO, autofs, CTLFLAG_RD, 0, "Automounter filesystem"); 1223914ddf8SEdward Tomasz Napierala int autofs_debug = 1; 1233914ddf8SEdward Tomasz Napierala TUNABLE_INT("vfs.autofs.debug", &autofs_debug); 1243914ddf8SEdward Tomasz Napierala SYSCTL_INT(_vfs_autofs, OID_AUTO, debug, CTLFLAG_RWTUN, 1253914ddf8SEdward Tomasz Napierala &autofs_debug, 1, "Enable debug messages"); 1263914ddf8SEdward Tomasz Napierala int autofs_mount_on_stat = 0; 1273914ddf8SEdward Tomasz Napierala TUNABLE_INT("vfs.autofs.mount_on_stat", &autofs_mount_on_stat); 1283914ddf8SEdward Tomasz Napierala SYSCTL_INT(_vfs_autofs, OID_AUTO, mount_on_stat, CTLFLAG_RWTUN, 1293914ddf8SEdward Tomasz Napierala &autofs_mount_on_stat, 0, "Trigger mount on stat(2) on mountpoint"); 1303914ddf8SEdward Tomasz Napierala int autofs_timeout = 30; 1313914ddf8SEdward Tomasz Napierala TUNABLE_INT("vfs.autofs.timeout", &autofs_timeout); 1323914ddf8SEdward Tomasz Napierala SYSCTL_INT(_vfs_autofs, OID_AUTO, timeout, CTLFLAG_RWTUN, 1333914ddf8SEdward Tomasz Napierala &autofs_timeout, 30, "Number of seconds to wait for automountd(8)"); 1343914ddf8SEdward Tomasz Napierala int autofs_cache = 600; 1353914ddf8SEdward Tomasz Napierala TUNABLE_INT("vfs.autofs.cache", &autofs_cache); 1363914ddf8SEdward Tomasz Napierala SYSCTL_INT(_vfs_autofs, OID_AUTO, cache, CTLFLAG_RWTUN, 1373914ddf8SEdward Tomasz Napierala &autofs_cache, 600, "Number of seconds to wait before reinvoking " 1383914ddf8SEdward Tomasz Napierala "automountd(8) for any given file or directory"); 1393914ddf8SEdward Tomasz Napierala int autofs_retry_attempts = 3; 1403914ddf8SEdward Tomasz Napierala TUNABLE_INT("vfs.autofs.retry_attempts", &autofs_retry_attempts); 1413914ddf8SEdward Tomasz Napierala SYSCTL_INT(_vfs_autofs, OID_AUTO, retry_attempts, CTLFLAG_RWTUN, 1423914ddf8SEdward Tomasz Napierala &autofs_retry_attempts, 3, "Number of attempts before failing mount"); 1433914ddf8SEdward Tomasz Napierala int autofs_retry_delay = 1; 1443914ddf8SEdward Tomasz Napierala TUNABLE_INT("vfs.autofs.retry_delay", &autofs_retry_delay); 1453914ddf8SEdward Tomasz Napierala SYSCTL_INT(_vfs_autofs, OID_AUTO, retry_delay, CTLFLAG_RWTUN, 1463914ddf8SEdward Tomasz Napierala &autofs_retry_delay, 1, "Number of seconds before retrying"); 1473914ddf8SEdward Tomasz Napierala int autofs_interruptible = 1; 1483914ddf8SEdward Tomasz Napierala TUNABLE_INT("vfs.autofs.interruptible", &autofs_interruptible); 1493914ddf8SEdward Tomasz Napierala SYSCTL_INT(_vfs_autofs, OID_AUTO, interruptible, CTLFLAG_RWTUN, 1503914ddf8SEdward Tomasz Napierala &autofs_interruptible, 1, "Allow requests to be interrupted by signal"); 1513914ddf8SEdward Tomasz Napierala 1523914ddf8SEdward Tomasz Napierala int 1533914ddf8SEdward Tomasz Napierala autofs_init(struct vfsconf *vfsp) 1543914ddf8SEdward Tomasz Napierala { 1553914ddf8SEdward Tomasz Napierala int error; 1563914ddf8SEdward Tomasz Napierala 157f81018caSEdward Tomasz Napierala KASSERT(autofs_softc == NULL, 158f81018caSEdward Tomasz Napierala ("softc %p, should be NULL", autofs_softc)); 159f81018caSEdward Tomasz Napierala 160f81018caSEdward Tomasz Napierala autofs_softc = malloc(sizeof(*autofs_softc), M_AUTOFS, 161f81018caSEdward Tomasz Napierala M_WAITOK | M_ZERO); 1623914ddf8SEdward Tomasz Napierala 1633914ddf8SEdward Tomasz Napierala autofs_request_zone = uma_zcreate("autofs_request", 1643914ddf8SEdward Tomasz Napierala sizeof(struct autofs_request), NULL, NULL, NULL, NULL, 1653914ddf8SEdward Tomasz Napierala UMA_ALIGN_PTR, 0); 1663914ddf8SEdward Tomasz Napierala autofs_node_zone = uma_zcreate("autofs_node", 1673914ddf8SEdward Tomasz Napierala sizeof(struct autofs_node), NULL, NULL, NULL, NULL, 1683914ddf8SEdward Tomasz Napierala UMA_ALIGN_PTR, 0); 1693914ddf8SEdward Tomasz Napierala 170f81018caSEdward Tomasz Napierala TAILQ_INIT(&autofs_softc->sc_requests); 171f81018caSEdward Tomasz Napierala cv_init(&autofs_softc->sc_cv, "autofscv"); 172f81018caSEdward Tomasz Napierala sx_init(&autofs_softc->sc_lock, "autofslk"); 1733914ddf8SEdward Tomasz Napierala 174f81018caSEdward Tomasz Napierala error = make_dev_p(MAKEDEV_CHECKNAME, &autofs_softc->sc_cdev, 175f81018caSEdward Tomasz Napierala &autofs_cdevsw, NULL, UID_ROOT, GID_WHEEL, 0600, "autofs"); 1763914ddf8SEdward Tomasz Napierala if (error != 0) { 1773914ddf8SEdward Tomasz Napierala AUTOFS_WARN("failed to create device node, error %d", error); 178f81018caSEdward Tomasz Napierala uma_zdestroy(autofs_request_zone); 179f81018caSEdward Tomasz Napierala uma_zdestroy(autofs_node_zone); 180f81018caSEdward Tomasz Napierala free(autofs_softc, M_AUTOFS); 181f81018caSEdward Tomasz Napierala 1823914ddf8SEdward Tomasz Napierala return (error); 1833914ddf8SEdward Tomasz Napierala } 184f81018caSEdward Tomasz Napierala autofs_softc->sc_cdev->si_drv1 = autofs_softc; 1853914ddf8SEdward Tomasz Napierala 1863914ddf8SEdward Tomasz Napierala return (0); 1873914ddf8SEdward Tomasz Napierala } 1883914ddf8SEdward Tomasz Napierala 1893914ddf8SEdward Tomasz Napierala int 1903914ddf8SEdward Tomasz Napierala autofs_uninit(struct vfsconf *vfsp) 1913914ddf8SEdward Tomasz Napierala { 1923914ddf8SEdward Tomasz Napierala 193f81018caSEdward Tomasz Napierala sx_xlock(&autofs_softc->sc_lock); 194f81018caSEdward Tomasz Napierala if (autofs_softc->sc_dev_opened) { 195f81018caSEdward Tomasz Napierala sx_xunlock(&autofs_softc->sc_lock); 1963914ddf8SEdward Tomasz Napierala return (EBUSY); 1973914ddf8SEdward Tomasz Napierala } 198f81018caSEdward Tomasz Napierala if (autofs_softc->sc_cdev != NULL) 199f81018caSEdward Tomasz Napierala destroy_dev(autofs_softc->sc_cdev); 2003914ddf8SEdward Tomasz Napierala 2013914ddf8SEdward Tomasz Napierala uma_zdestroy(autofs_request_zone); 2023914ddf8SEdward Tomasz Napierala uma_zdestroy(autofs_node_zone); 2033914ddf8SEdward Tomasz Napierala 204f81018caSEdward Tomasz Napierala sx_xunlock(&autofs_softc->sc_lock); 2053914ddf8SEdward Tomasz Napierala /* 2063914ddf8SEdward Tomasz Napierala * XXX: Race with open? 2073914ddf8SEdward Tomasz Napierala */ 208f81018caSEdward Tomasz Napierala free(autofs_softc, M_AUTOFS); 2093914ddf8SEdward Tomasz Napierala 2103914ddf8SEdward Tomasz Napierala return (0); 2113914ddf8SEdward Tomasz Napierala } 2123914ddf8SEdward Tomasz Napierala 2133914ddf8SEdward Tomasz Napierala bool 2143914ddf8SEdward Tomasz Napierala autofs_ignore_thread(const struct thread *td) 2153914ddf8SEdward Tomasz Napierala { 2163914ddf8SEdward Tomasz Napierala struct proc *p; 2173914ddf8SEdward Tomasz Napierala 2183914ddf8SEdward Tomasz Napierala p = td->td_proc; 2193914ddf8SEdward Tomasz Napierala 220f81018caSEdward Tomasz Napierala if (autofs_softc->sc_dev_opened == false) 2213914ddf8SEdward Tomasz Napierala return (false); 2223914ddf8SEdward Tomasz Napierala 2233914ddf8SEdward Tomasz Napierala PROC_LOCK(p); 224f81018caSEdward Tomasz Napierala if (p->p_session->s_sid == autofs_softc->sc_dev_sid) { 2253914ddf8SEdward Tomasz Napierala PROC_UNLOCK(p); 2263914ddf8SEdward Tomasz Napierala return (true); 2273914ddf8SEdward Tomasz Napierala } 2283914ddf8SEdward Tomasz Napierala PROC_UNLOCK(p); 2293914ddf8SEdward Tomasz Napierala 2303914ddf8SEdward Tomasz Napierala return (false); 2313914ddf8SEdward Tomasz Napierala } 2323914ddf8SEdward Tomasz Napierala 2333914ddf8SEdward Tomasz Napierala static char * 2343914ddf8SEdward Tomasz Napierala autofs_path(struct autofs_node *anp) 2353914ddf8SEdward Tomasz Napierala { 2363914ddf8SEdward Tomasz Napierala struct autofs_mount *amp; 2373914ddf8SEdward Tomasz Napierala char *path, *tmp; 2383914ddf8SEdward Tomasz Napierala 2393914ddf8SEdward Tomasz Napierala amp = anp->an_mount; 2403914ddf8SEdward Tomasz Napierala 2413914ddf8SEdward Tomasz Napierala path = strdup("", M_AUTOFS); 2423914ddf8SEdward Tomasz Napierala for (; anp->an_parent != NULL; anp = anp->an_parent) { 2433914ddf8SEdward Tomasz Napierala tmp = malloc(strlen(anp->an_name) + strlen(path) + 2, 2443914ddf8SEdward Tomasz Napierala M_AUTOFS, M_WAITOK); 2453914ddf8SEdward Tomasz Napierala strcpy(tmp, anp->an_name); 2463914ddf8SEdward Tomasz Napierala strcat(tmp, "/"); 2473914ddf8SEdward Tomasz Napierala strcat(tmp, path); 2483914ddf8SEdward Tomasz Napierala free(path, M_AUTOFS); 2493914ddf8SEdward Tomasz Napierala path = tmp; 2503914ddf8SEdward Tomasz Napierala } 2513914ddf8SEdward Tomasz Napierala 2523914ddf8SEdward Tomasz Napierala tmp = malloc(strlen(amp->am_mountpoint) + strlen(path) + 2, 2533914ddf8SEdward Tomasz Napierala M_AUTOFS, M_WAITOK); 2543914ddf8SEdward Tomasz Napierala strcpy(tmp, amp->am_mountpoint); 2553914ddf8SEdward Tomasz Napierala strcat(tmp, "/"); 2563914ddf8SEdward Tomasz Napierala strcat(tmp, path); 2573914ddf8SEdward Tomasz Napierala free(path, M_AUTOFS); 2583914ddf8SEdward Tomasz Napierala path = tmp; 2593914ddf8SEdward Tomasz Napierala 2603914ddf8SEdward Tomasz Napierala return (path); 2613914ddf8SEdward Tomasz Napierala } 2623914ddf8SEdward Tomasz Napierala 2633914ddf8SEdward Tomasz Napierala static void 264759489f9SEdward Tomasz Napierala autofs_task(void *context, int pending) 2653914ddf8SEdward Tomasz Napierala { 2663914ddf8SEdward Tomasz Napierala struct autofs_request *ar; 2673914ddf8SEdward Tomasz Napierala 2683914ddf8SEdward Tomasz Napierala ar = context; 2693914ddf8SEdward Tomasz Napierala 270f81018caSEdward Tomasz Napierala sx_xlock(&autofs_softc->sc_lock); 2713914ddf8SEdward Tomasz Napierala AUTOFS_WARN("request %d for %s timed out after %d seconds", 2723914ddf8SEdward Tomasz Napierala ar->ar_id, ar->ar_path, autofs_timeout); 2733914ddf8SEdward Tomasz Napierala /* 2743914ddf8SEdward Tomasz Napierala * XXX: EIO perhaps? 2753914ddf8SEdward Tomasz Napierala */ 2763914ddf8SEdward Tomasz Napierala ar->ar_error = ETIMEDOUT; 2774cdc52bdSEdward Tomasz Napierala ar->ar_wildcards = true; 2783914ddf8SEdward Tomasz Napierala ar->ar_done = true; 2793914ddf8SEdward Tomasz Napierala ar->ar_in_progress = false; 280f81018caSEdward Tomasz Napierala cv_broadcast(&autofs_softc->sc_cv); 281f81018caSEdward Tomasz Napierala sx_xunlock(&autofs_softc->sc_lock); 2823914ddf8SEdward Tomasz Napierala } 2833914ddf8SEdward Tomasz Napierala 2843914ddf8SEdward Tomasz Napierala bool 2853914ddf8SEdward Tomasz Napierala autofs_cached(struct autofs_node *anp, const char *component, int componentlen) 2863914ddf8SEdward Tomasz Napierala { 2873914ddf8SEdward Tomasz Napierala int error; 2883914ddf8SEdward Tomasz Napierala struct autofs_mount *amp; 2893914ddf8SEdward Tomasz Napierala 2903914ddf8SEdward Tomasz Napierala amp = anp->an_mount; 2913914ddf8SEdward Tomasz Napierala 2923914ddf8SEdward Tomasz Napierala AUTOFS_ASSERT_UNLOCKED(amp); 2933914ddf8SEdward Tomasz Napierala 2943914ddf8SEdward Tomasz Napierala /* 2954cdc52bdSEdward Tomasz Napierala * For root node we need to request automountd(8) assistance even 2964cdc52bdSEdward Tomasz Napierala * if the node is marked as cached, but the requested top-level 2974cdc52bdSEdward Tomasz Napierala * directory does not exist. This is necessary for wildcard indirect 2984cdc52bdSEdward Tomasz Napierala * map keys to work. We don't do this if we know that there are 2994cdc52bdSEdward Tomasz Napierala * no wildcards. 3003914ddf8SEdward Tomasz Napierala */ 3014cdc52bdSEdward Tomasz Napierala if (anp->an_parent == NULL && componentlen != 0 && anp->an_wildcards) { 3022eaebf35SEdward Tomasz Napierala AUTOFS_SLOCK(amp); 3033914ddf8SEdward Tomasz Napierala error = autofs_node_find(anp, component, componentlen, NULL); 3042eaebf35SEdward Tomasz Napierala AUTOFS_SUNLOCK(amp); 3053914ddf8SEdward Tomasz Napierala if (error != 0) 3063914ddf8SEdward Tomasz Napierala return (false); 3073914ddf8SEdward Tomasz Napierala } 3083914ddf8SEdward Tomasz Napierala 3093914ddf8SEdward Tomasz Napierala return (anp->an_cached); 3103914ddf8SEdward Tomasz Napierala } 3113914ddf8SEdward Tomasz Napierala 3123914ddf8SEdward Tomasz Napierala static void 3133914ddf8SEdward Tomasz Napierala autofs_cache_callout(void *context) 3143914ddf8SEdward Tomasz Napierala { 3153914ddf8SEdward Tomasz Napierala struct autofs_node *anp; 3163914ddf8SEdward Tomasz Napierala 3173914ddf8SEdward Tomasz Napierala anp = context; 3183914ddf8SEdward Tomasz Napierala anp->an_cached = false; 3193914ddf8SEdward Tomasz Napierala } 3203914ddf8SEdward Tomasz Napierala 321*e3d5f1feSEdward Tomasz Napierala void 322*e3d5f1feSEdward Tomasz Napierala autofs_flush(struct autofs_mount *amp) 323*e3d5f1feSEdward Tomasz Napierala { 324*e3d5f1feSEdward Tomasz Napierala 325*e3d5f1feSEdward Tomasz Napierala /* 326*e3d5f1feSEdward Tomasz Napierala * XXX: This will do for now, but ideally we should iterate 327*e3d5f1feSEdward Tomasz Napierala * over all the nodes. 328*e3d5f1feSEdward Tomasz Napierala */ 329*e3d5f1feSEdward Tomasz Napierala amp->am_root->an_cached = false; 330*e3d5f1feSEdward Tomasz Napierala AUTOFS_DEBUG("%s flushed", amp->am_mountpoint); 331*e3d5f1feSEdward Tomasz Napierala } 332*e3d5f1feSEdward Tomasz Napierala 3333914ddf8SEdward Tomasz Napierala /* 3343914ddf8SEdward Tomasz Napierala * The set/restore sigmask functions are used to (temporarily) overwrite 3353914ddf8SEdward Tomasz Napierala * the thread td_sigmask during triggering. 3363914ddf8SEdward Tomasz Napierala */ 3373914ddf8SEdward Tomasz Napierala static void 3383914ddf8SEdward Tomasz Napierala autofs_set_sigmask(sigset_t *oldset) 3393914ddf8SEdward Tomasz Napierala { 3403914ddf8SEdward Tomasz Napierala sigset_t newset; 3413914ddf8SEdward Tomasz Napierala int i; 3423914ddf8SEdward Tomasz Napierala 3433914ddf8SEdward Tomasz Napierala SIGFILLSET(newset); 3443914ddf8SEdward Tomasz Napierala /* Remove the autofs set of signals from newset */ 3453914ddf8SEdward Tomasz Napierala PROC_LOCK(curproc); 3463914ddf8SEdward Tomasz Napierala mtx_lock(&curproc->p_sigacts->ps_mtx); 3473914ddf8SEdward Tomasz Napierala for (i = 0 ; i < sizeof(autofs_sig_set)/sizeof(int) ; i++) { 3483914ddf8SEdward Tomasz Napierala /* 3493914ddf8SEdward Tomasz Napierala * But make sure we leave the ones already masked 3503914ddf8SEdward Tomasz Napierala * by the process, i.e. remove the signal from the 3513914ddf8SEdward Tomasz Napierala * temporary signalmask only if it wasn't already 3523914ddf8SEdward Tomasz Napierala * in p_sigmask. 3533914ddf8SEdward Tomasz Napierala */ 3543914ddf8SEdward Tomasz Napierala if (!SIGISMEMBER(curthread->td_sigmask, autofs_sig_set[i]) && 3553914ddf8SEdward Tomasz Napierala !SIGISMEMBER(curproc->p_sigacts->ps_sigignore, 3563914ddf8SEdward Tomasz Napierala autofs_sig_set[i])) { 3573914ddf8SEdward Tomasz Napierala SIGDELSET(newset, autofs_sig_set[i]); 3583914ddf8SEdward Tomasz Napierala } 3593914ddf8SEdward Tomasz Napierala } 3603914ddf8SEdward Tomasz Napierala mtx_unlock(&curproc->p_sigacts->ps_mtx); 3613914ddf8SEdward Tomasz Napierala kern_sigprocmask(curthread, SIG_SETMASK, &newset, oldset, 3623914ddf8SEdward Tomasz Napierala SIGPROCMASK_PROC_LOCKED); 3633914ddf8SEdward Tomasz Napierala PROC_UNLOCK(curproc); 3643914ddf8SEdward Tomasz Napierala } 3653914ddf8SEdward Tomasz Napierala 3663914ddf8SEdward Tomasz Napierala static void 3673914ddf8SEdward Tomasz Napierala autofs_restore_sigmask(sigset_t *set) 3683914ddf8SEdward Tomasz Napierala { 3693914ddf8SEdward Tomasz Napierala 3703914ddf8SEdward Tomasz Napierala kern_sigprocmask(curthread, SIG_SETMASK, set, NULL, 0); 3713914ddf8SEdward Tomasz Napierala } 3723914ddf8SEdward Tomasz Napierala 3733914ddf8SEdward Tomasz Napierala static int 3743914ddf8SEdward Tomasz Napierala autofs_trigger_one(struct autofs_node *anp, 3753914ddf8SEdward Tomasz Napierala const char *component, int componentlen) 3763914ddf8SEdward Tomasz Napierala { 3773914ddf8SEdward Tomasz Napierala sigset_t oldset; 3783914ddf8SEdward Tomasz Napierala struct autofs_mount *amp; 3793914ddf8SEdward Tomasz Napierala struct autofs_node *firstanp; 3803914ddf8SEdward Tomasz Napierala struct autofs_request *ar; 3813914ddf8SEdward Tomasz Napierala char *key, *path; 3823914ddf8SEdward Tomasz Napierala int error = 0, request_error, last; 3834cdc52bdSEdward Tomasz Napierala bool wildcards; 3843914ddf8SEdward Tomasz Napierala 3855d28b9edSEdward Tomasz Napierala amp = anp->an_mount; 3863914ddf8SEdward Tomasz Napierala 387f81018caSEdward Tomasz Napierala sx_assert(&autofs_softc->sc_lock, SA_XLOCKED); 3883914ddf8SEdward Tomasz Napierala 3893914ddf8SEdward Tomasz Napierala if (anp->an_parent == NULL) { 3903914ddf8SEdward Tomasz Napierala key = strndup(component, componentlen, M_AUTOFS); 3913914ddf8SEdward Tomasz Napierala } else { 3923914ddf8SEdward Tomasz Napierala for (firstanp = anp; firstanp->an_parent->an_parent != NULL; 3933914ddf8SEdward Tomasz Napierala firstanp = firstanp->an_parent) 3943914ddf8SEdward Tomasz Napierala continue; 3953914ddf8SEdward Tomasz Napierala key = strdup(firstanp->an_name, M_AUTOFS); 3963914ddf8SEdward Tomasz Napierala } 3973914ddf8SEdward Tomasz Napierala 3983914ddf8SEdward Tomasz Napierala path = autofs_path(anp); 3993914ddf8SEdward Tomasz Napierala 400f81018caSEdward Tomasz Napierala TAILQ_FOREACH(ar, &autofs_softc->sc_requests, ar_next) { 4013914ddf8SEdward Tomasz Napierala if (strcmp(ar->ar_path, path) != 0) 4023914ddf8SEdward Tomasz Napierala continue; 4033914ddf8SEdward Tomasz Napierala if (strcmp(ar->ar_key, key) != 0) 4043914ddf8SEdward Tomasz Napierala continue; 4053914ddf8SEdward Tomasz Napierala 4063914ddf8SEdward Tomasz Napierala KASSERT(strcmp(ar->ar_from, amp->am_from) == 0, 4073914ddf8SEdward Tomasz Napierala ("from changed; %s != %s", ar->ar_from, amp->am_from)); 4083914ddf8SEdward Tomasz Napierala KASSERT(strcmp(ar->ar_prefix, amp->am_prefix) == 0, 4093914ddf8SEdward Tomasz Napierala ("prefix changed; %s != %s", 4103914ddf8SEdward Tomasz Napierala ar->ar_prefix, amp->am_prefix)); 4113914ddf8SEdward Tomasz Napierala KASSERT(strcmp(ar->ar_options, amp->am_options) == 0, 4123914ddf8SEdward Tomasz Napierala ("options changed; %s != %s", 4133914ddf8SEdward Tomasz Napierala ar->ar_options, amp->am_options)); 4143914ddf8SEdward Tomasz Napierala 4153914ddf8SEdward Tomasz Napierala break; 4163914ddf8SEdward Tomasz Napierala } 4173914ddf8SEdward Tomasz Napierala 4183914ddf8SEdward Tomasz Napierala if (ar != NULL) { 4193914ddf8SEdward Tomasz Napierala refcount_acquire(&ar->ar_refcount); 4203914ddf8SEdward Tomasz Napierala } else { 4213914ddf8SEdward Tomasz Napierala ar = uma_zalloc(autofs_request_zone, M_WAITOK | M_ZERO); 4223914ddf8SEdward Tomasz Napierala ar->ar_mount = amp; 4233914ddf8SEdward Tomasz Napierala 424f81018caSEdward Tomasz Napierala ar->ar_id = 425f81018caSEdward Tomasz Napierala atomic_fetchadd_int(&autofs_softc->sc_last_request_id, 1); 4263914ddf8SEdward Tomasz Napierala strlcpy(ar->ar_from, amp->am_from, sizeof(ar->ar_from)); 4273914ddf8SEdward Tomasz Napierala strlcpy(ar->ar_path, path, sizeof(ar->ar_path)); 4283914ddf8SEdward Tomasz Napierala strlcpy(ar->ar_prefix, amp->am_prefix, sizeof(ar->ar_prefix)); 4293914ddf8SEdward Tomasz Napierala strlcpy(ar->ar_key, key, sizeof(ar->ar_key)); 4303914ddf8SEdward Tomasz Napierala strlcpy(ar->ar_options, 4313914ddf8SEdward Tomasz Napierala amp->am_options, sizeof(ar->ar_options)); 4323914ddf8SEdward Tomasz Napierala 433759489f9SEdward Tomasz Napierala TIMEOUT_TASK_INIT(taskqueue_thread, &ar->ar_task, 0, 434759489f9SEdward Tomasz Napierala autofs_task, ar); 435759489f9SEdward Tomasz Napierala error = taskqueue_enqueue_timeout(taskqueue_thread, 436759489f9SEdward Tomasz Napierala &ar->ar_task, autofs_timeout * hz); 437759489f9SEdward Tomasz Napierala if (error != 0) { 438759489f9SEdward Tomasz Napierala AUTOFS_WARN("taskqueue_enqueue_timeout() failed " 439759489f9SEdward Tomasz Napierala "with error %d", error); 440759489f9SEdward Tomasz Napierala } 4413914ddf8SEdward Tomasz Napierala refcount_init(&ar->ar_refcount, 1); 442f81018caSEdward Tomasz Napierala TAILQ_INSERT_TAIL(&autofs_softc->sc_requests, ar, ar_next); 4433914ddf8SEdward Tomasz Napierala } 4443914ddf8SEdward Tomasz Napierala 445f81018caSEdward Tomasz Napierala cv_broadcast(&autofs_softc->sc_cv); 4463914ddf8SEdward Tomasz Napierala while (ar->ar_done == false) { 4473914ddf8SEdward Tomasz Napierala if (autofs_interruptible != 0) { 4483914ddf8SEdward Tomasz Napierala autofs_set_sigmask(&oldset); 449f81018caSEdward Tomasz Napierala error = cv_wait_sig(&autofs_softc->sc_cv, 450f81018caSEdward Tomasz Napierala &autofs_softc->sc_lock); 4513914ddf8SEdward Tomasz Napierala autofs_restore_sigmask(&oldset); 4523914ddf8SEdward Tomasz Napierala if (error != 0) { 4533914ddf8SEdward Tomasz Napierala AUTOFS_WARN("cv_wait_sig for %s failed " 4543914ddf8SEdward Tomasz Napierala "with error %d", ar->ar_path, error); 4553914ddf8SEdward Tomasz Napierala break; 4563914ddf8SEdward Tomasz Napierala } 4573914ddf8SEdward Tomasz Napierala } else { 458f81018caSEdward Tomasz Napierala cv_wait(&autofs_softc->sc_cv, &autofs_softc->sc_lock); 4593914ddf8SEdward Tomasz Napierala } 4603914ddf8SEdward Tomasz Napierala } 4613914ddf8SEdward Tomasz Napierala 4623914ddf8SEdward Tomasz Napierala request_error = ar->ar_error; 4633914ddf8SEdward Tomasz Napierala if (request_error != 0) { 4643914ddf8SEdward Tomasz Napierala AUTOFS_WARN("request for %s completed with error %d", 4653914ddf8SEdward Tomasz Napierala ar->ar_path, request_error); 4663914ddf8SEdward Tomasz Napierala } 4673914ddf8SEdward Tomasz Napierala 4684cdc52bdSEdward Tomasz Napierala wildcards = ar->ar_wildcards; 4694cdc52bdSEdward Tomasz Napierala 4703914ddf8SEdward Tomasz Napierala last = refcount_release(&ar->ar_refcount); 4713914ddf8SEdward Tomasz Napierala if (last) { 472f81018caSEdward Tomasz Napierala TAILQ_REMOVE(&autofs_softc->sc_requests, ar, ar_next); 4733914ddf8SEdward Tomasz Napierala /* 47428a23d3dSEdward Tomasz Napierala * Unlock the sc_lock, so that autofs_task() can complete. 4753914ddf8SEdward Tomasz Napierala */ 476f81018caSEdward Tomasz Napierala sx_xunlock(&autofs_softc->sc_lock); 477759489f9SEdward Tomasz Napierala taskqueue_cancel_timeout(taskqueue_thread, &ar->ar_task, NULL); 478759489f9SEdward Tomasz Napierala taskqueue_drain_timeout(taskqueue_thread, &ar->ar_task); 4793914ddf8SEdward Tomasz Napierala uma_zfree(autofs_request_zone, ar); 48028a23d3dSEdward Tomasz Napierala sx_xlock(&autofs_softc->sc_lock); 4813914ddf8SEdward Tomasz Napierala } 4823914ddf8SEdward Tomasz Napierala 4833914ddf8SEdward Tomasz Napierala /* 4843914ddf8SEdward Tomasz Napierala * Note that we do not do negative caching on purpose. This 4853914ddf8SEdward Tomasz Napierala * way the user can retry access at any time, e.g. after fixing 4863914ddf8SEdward Tomasz Napierala * the failure reason, without waiting for cache timer to expire. 4873914ddf8SEdward Tomasz Napierala */ 4883914ddf8SEdward Tomasz Napierala if (error == 0 && request_error == 0 && autofs_cache > 0) { 4893914ddf8SEdward Tomasz Napierala anp->an_cached = true; 4904cdc52bdSEdward Tomasz Napierala anp->an_wildcards = wildcards; 4913914ddf8SEdward Tomasz Napierala callout_reset(&anp->an_callout, autofs_cache * hz, 4923914ddf8SEdward Tomasz Napierala autofs_cache_callout, anp); 4933914ddf8SEdward Tomasz Napierala } 4943914ddf8SEdward Tomasz Napierala 4953914ddf8SEdward Tomasz Napierala free(key, M_AUTOFS); 4963914ddf8SEdward Tomasz Napierala free(path, M_AUTOFS); 4973914ddf8SEdward Tomasz Napierala 4983914ddf8SEdward Tomasz Napierala if (error != 0) 4993914ddf8SEdward Tomasz Napierala return (error); 5003914ddf8SEdward Tomasz Napierala return (request_error); 5013914ddf8SEdward Tomasz Napierala } 5023914ddf8SEdward Tomasz Napierala 5033914ddf8SEdward Tomasz Napierala /* 5043914ddf8SEdward Tomasz Napierala * Send request to automountd(8) and wait for completion. 5053914ddf8SEdward Tomasz Napierala */ 5063914ddf8SEdward Tomasz Napierala int 5073914ddf8SEdward Tomasz Napierala autofs_trigger(struct autofs_node *anp, 5083914ddf8SEdward Tomasz Napierala const char *component, int componentlen) 5093914ddf8SEdward Tomasz Napierala { 5103914ddf8SEdward Tomasz Napierala int error; 5113914ddf8SEdward Tomasz Napierala 5123914ddf8SEdward Tomasz Napierala for (;;) { 5133914ddf8SEdward Tomasz Napierala error = autofs_trigger_one(anp, component, componentlen); 5143914ddf8SEdward Tomasz Napierala if (error == 0) { 5153914ddf8SEdward Tomasz Napierala anp->an_retries = 0; 5163914ddf8SEdward Tomasz Napierala return (0); 5173914ddf8SEdward Tomasz Napierala } 51831a4b1aaSEdward Tomasz Napierala if (error == EINTR || error == ERESTART) { 5193914ddf8SEdward Tomasz Napierala AUTOFS_DEBUG("trigger interrupted by signal, " 5203914ddf8SEdward Tomasz Napierala "not retrying"); 5213914ddf8SEdward Tomasz Napierala anp->an_retries = 0; 5223914ddf8SEdward Tomasz Napierala return (error); 5233914ddf8SEdward Tomasz Napierala } 5243914ddf8SEdward Tomasz Napierala anp->an_retries++; 5253914ddf8SEdward Tomasz Napierala if (anp->an_retries >= autofs_retry_attempts) { 5263914ddf8SEdward Tomasz Napierala AUTOFS_DEBUG("trigger failed %d times; returning " 5273914ddf8SEdward Tomasz Napierala "error %d", anp->an_retries, error); 5283914ddf8SEdward Tomasz Napierala anp->an_retries = 0; 5293914ddf8SEdward Tomasz Napierala return (error); 5303914ddf8SEdward Tomasz Napierala 5313914ddf8SEdward Tomasz Napierala } 5323914ddf8SEdward Tomasz Napierala AUTOFS_DEBUG("trigger failed with error %d; will retry in " 5333914ddf8SEdward Tomasz Napierala "%d seconds, %d attempts left", error, autofs_retry_delay, 5343914ddf8SEdward Tomasz Napierala autofs_retry_attempts - anp->an_retries); 535f81018caSEdward Tomasz Napierala sx_xunlock(&autofs_softc->sc_lock); 5363914ddf8SEdward Tomasz Napierala pause("autofs_retry", autofs_retry_delay * hz); 537f81018caSEdward Tomasz Napierala sx_xlock(&autofs_softc->sc_lock); 5383914ddf8SEdward Tomasz Napierala } 5393914ddf8SEdward Tomasz Napierala } 5403914ddf8SEdward Tomasz Napierala 5413914ddf8SEdward Tomasz Napierala static int 542f81018caSEdward Tomasz Napierala autofs_ioctl_request(struct autofs_daemon_request *adr) 5433914ddf8SEdward Tomasz Napierala { 5443914ddf8SEdward Tomasz Napierala struct autofs_request *ar; 5453914ddf8SEdward Tomasz Napierala int error; 5463914ddf8SEdward Tomasz Napierala 547f81018caSEdward Tomasz Napierala sx_xlock(&autofs_softc->sc_lock); 5483914ddf8SEdward Tomasz Napierala for (;;) { 549f81018caSEdward Tomasz Napierala TAILQ_FOREACH(ar, &autofs_softc->sc_requests, ar_next) { 5503914ddf8SEdward Tomasz Napierala if (ar->ar_done) 5513914ddf8SEdward Tomasz Napierala continue; 5523914ddf8SEdward Tomasz Napierala if (ar->ar_in_progress) 5533914ddf8SEdward Tomasz Napierala continue; 5543914ddf8SEdward Tomasz Napierala 5553914ddf8SEdward Tomasz Napierala break; 5563914ddf8SEdward Tomasz Napierala } 5573914ddf8SEdward Tomasz Napierala 5583914ddf8SEdward Tomasz Napierala if (ar != NULL) 5593914ddf8SEdward Tomasz Napierala break; 5603914ddf8SEdward Tomasz Napierala 561f81018caSEdward Tomasz Napierala error = cv_wait_sig(&autofs_softc->sc_cv, 562f81018caSEdward Tomasz Napierala &autofs_softc->sc_lock); 5633914ddf8SEdward Tomasz Napierala if (error != 0) { 564f81018caSEdward Tomasz Napierala sx_xunlock(&autofs_softc->sc_lock); 5653914ddf8SEdward Tomasz Napierala return (error); 5663914ddf8SEdward Tomasz Napierala } 5673914ddf8SEdward Tomasz Napierala } 5683914ddf8SEdward Tomasz Napierala 5693914ddf8SEdward Tomasz Napierala ar->ar_in_progress = true; 570f81018caSEdward Tomasz Napierala sx_xunlock(&autofs_softc->sc_lock); 5713914ddf8SEdward Tomasz Napierala 5723914ddf8SEdward Tomasz Napierala adr->adr_id = ar->ar_id; 5733914ddf8SEdward Tomasz Napierala strlcpy(adr->adr_from, ar->ar_from, sizeof(adr->adr_from)); 5743914ddf8SEdward Tomasz Napierala strlcpy(adr->adr_path, ar->ar_path, sizeof(adr->adr_path)); 5753914ddf8SEdward Tomasz Napierala strlcpy(adr->adr_prefix, ar->ar_prefix, sizeof(adr->adr_prefix)); 5763914ddf8SEdward Tomasz Napierala strlcpy(adr->adr_key, ar->ar_key, sizeof(adr->adr_key)); 5773914ddf8SEdward Tomasz Napierala strlcpy(adr->adr_options, ar->ar_options, sizeof(adr->adr_options)); 5783914ddf8SEdward Tomasz Napierala 5793914ddf8SEdward Tomasz Napierala PROC_LOCK(curproc); 580f81018caSEdward Tomasz Napierala autofs_softc->sc_dev_sid = curproc->p_session->s_sid; 5813914ddf8SEdward Tomasz Napierala PROC_UNLOCK(curproc); 5823914ddf8SEdward Tomasz Napierala 5833914ddf8SEdward Tomasz Napierala return (0); 5843914ddf8SEdward Tomasz Napierala } 5853914ddf8SEdward Tomasz Napierala 5863914ddf8SEdward Tomasz Napierala static int 587f81018caSEdward Tomasz Napierala autofs_ioctl_done(struct autofs_daemon_done *add) 5883914ddf8SEdward Tomasz Napierala { 5893914ddf8SEdward Tomasz Napierala struct autofs_request *ar; 5903914ddf8SEdward Tomasz Napierala 591f81018caSEdward Tomasz Napierala sx_xlock(&autofs_softc->sc_lock); 592f81018caSEdward Tomasz Napierala TAILQ_FOREACH(ar, &autofs_softc->sc_requests, ar_next) { 5933914ddf8SEdward Tomasz Napierala if (ar->ar_id == add->add_id) 5943914ddf8SEdward Tomasz Napierala break; 5953914ddf8SEdward Tomasz Napierala } 5963914ddf8SEdward Tomasz Napierala 5973914ddf8SEdward Tomasz Napierala if (ar == NULL) { 598f81018caSEdward Tomasz Napierala sx_xunlock(&autofs_softc->sc_lock); 5993914ddf8SEdward Tomasz Napierala AUTOFS_DEBUG("id %d not found", add->add_id); 6003914ddf8SEdward Tomasz Napierala return (ESRCH); 6013914ddf8SEdward Tomasz Napierala } 6023914ddf8SEdward Tomasz Napierala 6033914ddf8SEdward Tomasz Napierala ar->ar_error = add->add_error; 6044cdc52bdSEdward Tomasz Napierala ar->ar_wildcards = add->add_wildcards; 6053914ddf8SEdward Tomasz Napierala ar->ar_done = true; 6063914ddf8SEdward Tomasz Napierala ar->ar_in_progress = false; 607f81018caSEdward Tomasz Napierala cv_broadcast(&autofs_softc->sc_cv); 6083914ddf8SEdward Tomasz Napierala 609f81018caSEdward Tomasz Napierala sx_xunlock(&autofs_softc->sc_lock); 6103914ddf8SEdward Tomasz Napierala 6113914ddf8SEdward Tomasz Napierala return (0); 6123914ddf8SEdward Tomasz Napierala } 6133914ddf8SEdward Tomasz Napierala 6143914ddf8SEdward Tomasz Napierala static int 6153914ddf8SEdward Tomasz Napierala autofs_open(struct cdev *dev, int flags, int fmt, struct thread *td) 6163914ddf8SEdward Tomasz Napierala { 6173914ddf8SEdward Tomasz Napierala 618f81018caSEdward Tomasz Napierala sx_xlock(&autofs_softc->sc_lock); 619a32ba4e6SEdward Tomasz Napierala /* 620a32ba4e6SEdward Tomasz Napierala * We must never block automountd(8) and its descendants, and we use 621a32ba4e6SEdward Tomasz Napierala * session ID to determine that: we store session id of the process 622a32ba4e6SEdward Tomasz Napierala * that opened the device, and then compare it with session ids 623a32ba4e6SEdward Tomasz Napierala * of triggering processes. This means running a second automountd(8) 624a32ba4e6SEdward Tomasz Napierala * instance would break the previous one. The check below prevents 625a32ba4e6SEdward Tomasz Napierala * it from happening. 626a32ba4e6SEdward Tomasz Napierala */ 627f81018caSEdward Tomasz Napierala if (autofs_softc->sc_dev_opened) { 628f81018caSEdward Tomasz Napierala sx_xunlock(&autofs_softc->sc_lock); 6293914ddf8SEdward Tomasz Napierala return (EBUSY); 6303914ddf8SEdward Tomasz Napierala } 6313914ddf8SEdward Tomasz Napierala 632f81018caSEdward Tomasz Napierala autofs_softc->sc_dev_opened = true; 633f81018caSEdward Tomasz Napierala sx_xunlock(&autofs_softc->sc_lock); 6343914ddf8SEdward Tomasz Napierala 6353914ddf8SEdward Tomasz Napierala return (0); 6363914ddf8SEdward Tomasz Napierala } 6373914ddf8SEdward Tomasz Napierala 6383914ddf8SEdward Tomasz Napierala static int 6393914ddf8SEdward Tomasz Napierala autofs_close(struct cdev *dev, int flag, int fmt, struct thread *td) 6403914ddf8SEdward Tomasz Napierala { 6413914ddf8SEdward Tomasz Napierala 642f81018caSEdward Tomasz Napierala sx_xlock(&autofs_softc->sc_lock); 643f81018caSEdward Tomasz Napierala KASSERT(autofs_softc->sc_dev_opened, ("not opened?")); 644f81018caSEdward Tomasz Napierala autofs_softc->sc_dev_opened = false; 645f81018caSEdward Tomasz Napierala sx_xunlock(&autofs_softc->sc_lock); 6463914ddf8SEdward Tomasz Napierala 6473914ddf8SEdward Tomasz Napierala return (0); 6483914ddf8SEdward Tomasz Napierala } 6493914ddf8SEdward Tomasz Napierala 6503914ddf8SEdward Tomasz Napierala static int 6513914ddf8SEdward Tomasz Napierala autofs_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, int mode, 6523914ddf8SEdward Tomasz Napierala struct thread *td) 6533914ddf8SEdward Tomasz Napierala { 6543914ddf8SEdward Tomasz Napierala 655f81018caSEdward Tomasz Napierala KASSERT(autofs_softc->sc_dev_opened, ("not opened?")); 6563914ddf8SEdward Tomasz Napierala 6573914ddf8SEdward Tomasz Napierala switch (cmd) { 6583914ddf8SEdward Tomasz Napierala case AUTOFSREQUEST: 659f81018caSEdward Tomasz Napierala return (autofs_ioctl_request( 6603914ddf8SEdward Tomasz Napierala (struct autofs_daemon_request *)arg)); 6613914ddf8SEdward Tomasz Napierala case AUTOFSDONE: 662f81018caSEdward Tomasz Napierala return (autofs_ioctl_done( 6633914ddf8SEdward Tomasz Napierala (struct autofs_daemon_done *)arg)); 6643914ddf8SEdward Tomasz Napierala default: 6653914ddf8SEdward Tomasz Napierala AUTOFS_DEBUG("invalid cmd %lx", cmd); 6663914ddf8SEdward Tomasz Napierala return (EINVAL); 6673914ddf8SEdward Tomasz Napierala } 6683914ddf8SEdward Tomasz Napierala } 669