13914ddf8SEdward Tomasz Napierala /*- 2*18dffafaSEdward Tomasz Napierala * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3*18dffafaSEdward Tomasz Napierala * 43914ddf8SEdward Tomasz Napierala * Copyright (c) 2014 The FreeBSD Foundation 53914ddf8SEdward Tomasz Napierala * All rights reserved. 63914ddf8SEdward Tomasz Napierala * 73914ddf8SEdward Tomasz Napierala * This software was developed by Edward Tomasz Napierala under sponsorship 83914ddf8SEdward Tomasz Napierala * from the FreeBSD Foundation. 93914ddf8SEdward Tomasz Napierala * 103914ddf8SEdward Tomasz Napierala * Redistribution and use in source and binary forms, with or without 113914ddf8SEdward Tomasz Napierala * modification, are permitted provided that the following conditions 123914ddf8SEdward Tomasz Napierala * are met: 133914ddf8SEdward Tomasz Napierala * 1. Redistributions of source code must retain the above copyright 143914ddf8SEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer. 153914ddf8SEdward Tomasz Napierala * 2. Redistributions in binary form must reproduce the above copyright 163914ddf8SEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer in the 173914ddf8SEdward Tomasz Napierala * documentation and/or other materials provided with the distribution. 183914ddf8SEdward Tomasz Napierala * 193914ddf8SEdward Tomasz Napierala * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 203914ddf8SEdward Tomasz Napierala * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 213914ddf8SEdward Tomasz Napierala * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 223914ddf8SEdward Tomasz Napierala * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 233914ddf8SEdward Tomasz Napierala * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 243914ddf8SEdward Tomasz Napierala * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 253914ddf8SEdward Tomasz Napierala * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 263914ddf8SEdward Tomasz Napierala * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 273914ddf8SEdward Tomasz Napierala * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 283914ddf8SEdward Tomasz Napierala * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 293914ddf8SEdward Tomasz Napierala * SUCH DAMAGE. 303914ddf8SEdward Tomasz Napierala * 313914ddf8SEdward Tomasz Napierala */ 323914ddf8SEdward Tomasz Napierala 33925fd945SEdward Tomasz Napierala #include <sys/cdefs.h> 34925fd945SEdward Tomasz Napierala __FBSDID("$FreeBSD$"); 35925fd945SEdward Tomasz Napierala 363914ddf8SEdward Tomasz Napierala #include <sys/param.h> 373914ddf8SEdward Tomasz Napierala #include <sys/systm.h> 383914ddf8SEdward Tomasz Napierala #include <sys/conf.h> 393914ddf8SEdward Tomasz Napierala #include <sys/condvar.h> 403914ddf8SEdward Tomasz Napierala #include <sys/ioccom.h> 413914ddf8SEdward Tomasz Napierala #include <sys/kernel.h> 423914ddf8SEdward Tomasz Napierala #include <sys/module.h> 433914ddf8SEdward Tomasz Napierala #include <sys/mount.h> 447571d313SEdward Tomasz Napierala #include <sys/stat.h> 453914ddf8SEdward Tomasz Napierala #include <sys/sx.h> 46759489f9SEdward Tomasz Napierala #include <sys/taskqueue.h> 4742ed64e3SEdward Tomasz Napierala #include <sys/tree.h> 483914ddf8SEdward Tomasz Napierala #include <sys/vnode.h> 493914ddf8SEdward Tomasz Napierala 50f5440d1aSEdward Tomasz Napierala #include <fs/autofs/autofs.h> 513914ddf8SEdward Tomasz Napierala 523914ddf8SEdward Tomasz Napierala static const char *autofs_opts[] = { 533914ddf8SEdward Tomasz Napierala "from", "master_options", "master_prefix", NULL 543914ddf8SEdward Tomasz Napierala }; 553914ddf8SEdward Tomasz Napierala 56f81018caSEdward Tomasz Napierala extern struct autofs_softc *autofs_softc; 573914ddf8SEdward Tomasz Napierala 583914ddf8SEdward Tomasz Napierala static int 593914ddf8SEdward Tomasz Napierala autofs_mount(struct mount *mp) 603914ddf8SEdward Tomasz Napierala { 613914ddf8SEdward Tomasz Napierala struct autofs_mount *amp; 623914ddf8SEdward Tomasz Napierala char *from, *fspath, *options, *prefix; 633914ddf8SEdward Tomasz Napierala int error; 643914ddf8SEdward Tomasz Napierala 653914ddf8SEdward Tomasz Napierala if (vfs_filteropt(mp->mnt_optnew, autofs_opts)) 663914ddf8SEdward Tomasz Napierala return (EINVAL); 673914ddf8SEdward Tomasz Napierala 68e3d5f1feSEdward Tomasz Napierala if (mp->mnt_flag & MNT_UPDATE) { 69e3d5f1feSEdward Tomasz Napierala autofs_flush(VFSTOAUTOFS(mp)); 703914ddf8SEdward Tomasz Napierala return (0); 71e3d5f1feSEdward Tomasz Napierala } 723914ddf8SEdward Tomasz Napierala 733914ddf8SEdward Tomasz Napierala if (vfs_getopt(mp->mnt_optnew, "from", (void **)&from, NULL)) 743914ddf8SEdward Tomasz Napierala return (EINVAL); 753914ddf8SEdward Tomasz Napierala 763914ddf8SEdward Tomasz Napierala if (vfs_getopt(mp->mnt_optnew, "fspath", (void **)&fspath, NULL)) 773914ddf8SEdward Tomasz Napierala return (EINVAL); 783914ddf8SEdward Tomasz Napierala 793914ddf8SEdward Tomasz Napierala if (vfs_getopt(mp->mnt_optnew, "master_options", (void **)&options, NULL)) 803914ddf8SEdward Tomasz Napierala return (EINVAL); 813914ddf8SEdward Tomasz Napierala 823914ddf8SEdward Tomasz Napierala if (vfs_getopt(mp->mnt_optnew, "master_prefix", (void **)&prefix, NULL)) 833914ddf8SEdward Tomasz Napierala return (EINVAL); 843914ddf8SEdward Tomasz Napierala 853914ddf8SEdward Tomasz Napierala amp = malloc(sizeof(*amp), M_AUTOFS, M_WAITOK | M_ZERO); 863914ddf8SEdward Tomasz Napierala mp->mnt_data = amp; 873914ddf8SEdward Tomasz Napierala amp->am_mp = mp; 883914ddf8SEdward Tomasz Napierala strlcpy(amp->am_from, from, sizeof(amp->am_from)); 893914ddf8SEdward Tomasz Napierala strlcpy(amp->am_mountpoint, fspath, sizeof(amp->am_mountpoint)); 903914ddf8SEdward Tomasz Napierala strlcpy(amp->am_options, options, sizeof(amp->am_options)); 913914ddf8SEdward Tomasz Napierala strlcpy(amp->am_prefix, prefix, sizeof(amp->am_prefix)); 923914ddf8SEdward Tomasz Napierala sx_init(&->am_lock, "autofslk"); 933914ddf8SEdward Tomasz Napierala amp->am_last_fileno = 1; 943914ddf8SEdward Tomasz Napierala 953914ddf8SEdward Tomasz Napierala vfs_getnewfsid(mp); 963914ddf8SEdward Tomasz Napierala 97d19c297eSEdward Tomasz Napierala MNT_ILOCK(mp); 98d19c297eSEdward Tomasz Napierala mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED; 99d19c297eSEdward Tomasz Napierala MNT_IUNLOCK(mp); 100d19c297eSEdward Tomasz Napierala 1012eaebf35SEdward Tomasz Napierala AUTOFS_XLOCK(amp); 1023914ddf8SEdward Tomasz Napierala error = autofs_node_new(NULL, amp, ".", -1, &->am_root); 1033914ddf8SEdward Tomasz Napierala if (error != 0) { 1042eaebf35SEdward Tomasz Napierala AUTOFS_XUNLOCK(amp); 1053914ddf8SEdward Tomasz Napierala free(amp, M_AUTOFS); 1063914ddf8SEdward Tomasz Napierala return (error); 1073914ddf8SEdward Tomasz Napierala } 1082eaebf35SEdward Tomasz Napierala AUTOFS_XUNLOCK(amp); 1093914ddf8SEdward Tomasz Napierala 1103914ddf8SEdward Tomasz Napierala vfs_mountedfrom(mp, from); 1113914ddf8SEdward Tomasz Napierala 1123914ddf8SEdward Tomasz Napierala return (0); 1133914ddf8SEdward Tomasz Napierala } 1143914ddf8SEdward Tomasz Napierala 1153914ddf8SEdward Tomasz Napierala static int 1163914ddf8SEdward Tomasz Napierala autofs_unmount(struct mount *mp, int mntflags) 1173914ddf8SEdward Tomasz Napierala { 1183914ddf8SEdward Tomasz Napierala struct autofs_mount *amp; 1193914ddf8SEdward Tomasz Napierala struct autofs_node *anp; 1203914ddf8SEdward Tomasz Napierala struct autofs_request *ar; 1213914ddf8SEdward Tomasz Napierala int error, flags; 1223914ddf8SEdward Tomasz Napierala bool found; 1233914ddf8SEdward Tomasz Napierala 1243914ddf8SEdward Tomasz Napierala amp = VFSTOAUTOFS(mp); 1253914ddf8SEdward Tomasz Napierala 1263914ddf8SEdward Tomasz Napierala flags = 0; 1273914ddf8SEdward Tomasz Napierala if (mntflags & MNT_FORCE) 1283914ddf8SEdward Tomasz Napierala flags |= FORCECLOSE; 1293914ddf8SEdward Tomasz Napierala error = vflush(mp, 0, flags, curthread); 1303914ddf8SEdward Tomasz Napierala if (error != 0) { 1313914ddf8SEdward Tomasz Napierala AUTOFS_WARN("vflush failed with error %d", error); 1323914ddf8SEdward Tomasz Napierala return (error); 1333914ddf8SEdward Tomasz Napierala } 1343914ddf8SEdward Tomasz Napierala 1353914ddf8SEdward Tomasz Napierala /* 1363914ddf8SEdward Tomasz Napierala * All vnodes are gone, and new one will not appear - so, 1373914ddf8SEdward Tomasz Napierala * no new triggerings. We can iterate over outstanding 1383914ddf8SEdward Tomasz Napierala * autofs_requests and terminate them. 1393914ddf8SEdward Tomasz Napierala */ 1403914ddf8SEdward Tomasz Napierala for (;;) { 1413914ddf8SEdward Tomasz Napierala found = false; 142f81018caSEdward Tomasz Napierala sx_xlock(&autofs_softc->sc_lock); 143f81018caSEdward Tomasz Napierala TAILQ_FOREACH(ar, &autofs_softc->sc_requests, ar_next) { 1443914ddf8SEdward Tomasz Napierala if (ar->ar_mount != amp) 1453914ddf8SEdward Tomasz Napierala continue; 1463914ddf8SEdward Tomasz Napierala ar->ar_error = ENXIO; 1473914ddf8SEdward Tomasz Napierala ar->ar_done = true; 1483914ddf8SEdward Tomasz Napierala ar->ar_in_progress = false; 1493914ddf8SEdward Tomasz Napierala found = true; 1503914ddf8SEdward Tomasz Napierala } 151f81018caSEdward Tomasz Napierala sx_xunlock(&autofs_softc->sc_lock); 1523914ddf8SEdward Tomasz Napierala if (found == false) 1533914ddf8SEdward Tomasz Napierala break; 1543914ddf8SEdward Tomasz Napierala 155f81018caSEdward Tomasz Napierala cv_broadcast(&autofs_softc->sc_cv); 1563914ddf8SEdward Tomasz Napierala pause("autofs_umount", 1); 1573914ddf8SEdward Tomasz Napierala } 1583914ddf8SEdward Tomasz Napierala 1592eaebf35SEdward Tomasz Napierala AUTOFS_XLOCK(amp); 1603914ddf8SEdward Tomasz Napierala 1613914ddf8SEdward Tomasz Napierala /* 1623914ddf8SEdward Tomasz Napierala * Not terribly efficient, but at least not recursive. 1633914ddf8SEdward Tomasz Napierala */ 16442ed64e3SEdward Tomasz Napierala while (!RB_EMPTY(&->am_root->an_children)) { 16542ed64e3SEdward Tomasz Napierala anp = RB_MIN(autofs_node_tree, &->am_root->an_children); 16642ed64e3SEdward Tomasz Napierala while (!RB_EMPTY(&anp->an_children)) 16742ed64e3SEdward Tomasz Napierala anp = RB_MIN(autofs_node_tree, &anp->an_children); 1683914ddf8SEdward Tomasz Napierala autofs_node_delete(anp); 1693914ddf8SEdward Tomasz Napierala } 1703914ddf8SEdward Tomasz Napierala autofs_node_delete(amp->am_root); 1713914ddf8SEdward Tomasz Napierala 1723914ddf8SEdward Tomasz Napierala mp->mnt_data = NULL; 1732eaebf35SEdward Tomasz Napierala AUTOFS_XUNLOCK(amp); 1743914ddf8SEdward Tomasz Napierala 1753914ddf8SEdward Tomasz Napierala sx_destroy(&->am_lock); 1763914ddf8SEdward Tomasz Napierala 1773914ddf8SEdward Tomasz Napierala free(amp, M_AUTOFS); 1783914ddf8SEdward Tomasz Napierala 1793914ddf8SEdward Tomasz Napierala return (0); 1803914ddf8SEdward Tomasz Napierala } 1813914ddf8SEdward Tomasz Napierala 1823914ddf8SEdward Tomasz Napierala static int 1833914ddf8SEdward Tomasz Napierala autofs_root(struct mount *mp, int flags, struct vnode **vpp) 1843914ddf8SEdward Tomasz Napierala { 1853914ddf8SEdward Tomasz Napierala struct autofs_mount *amp; 1863914ddf8SEdward Tomasz Napierala int error; 1873914ddf8SEdward Tomasz Napierala 1883914ddf8SEdward Tomasz Napierala amp = VFSTOAUTOFS(mp); 1893914ddf8SEdward Tomasz Napierala 190d19c297eSEdward Tomasz Napierala error = autofs_node_vn(amp->am_root, mp, flags, vpp); 1913914ddf8SEdward Tomasz Napierala 1923914ddf8SEdward Tomasz Napierala return (error); 1933914ddf8SEdward Tomasz Napierala } 1943914ddf8SEdward Tomasz Napierala 1953914ddf8SEdward Tomasz Napierala static int 1963914ddf8SEdward Tomasz Napierala autofs_statfs(struct mount *mp, struct statfs *sbp) 1973914ddf8SEdward Tomasz Napierala { 1983914ddf8SEdward Tomasz Napierala 1997571d313SEdward Tomasz Napierala sbp->f_bsize = S_BLKSIZE; 2003914ddf8SEdward Tomasz Napierala sbp->f_iosize = 0; 2013914ddf8SEdward Tomasz Napierala sbp->f_blocks = 0; 2023914ddf8SEdward Tomasz Napierala sbp->f_bfree = 0; 2033914ddf8SEdward Tomasz Napierala sbp->f_bavail = 0; 2043914ddf8SEdward Tomasz Napierala sbp->f_files = 0; 2053914ddf8SEdward Tomasz Napierala sbp->f_ffree = 0; 2063914ddf8SEdward Tomasz Napierala 2073914ddf8SEdward Tomasz Napierala return (0); 2083914ddf8SEdward Tomasz Napierala } 2093914ddf8SEdward Tomasz Napierala 2103914ddf8SEdward Tomasz Napierala static struct vfsops autofs_vfsops = { 2113914ddf8SEdward Tomasz Napierala .vfs_fhtovp = NULL, /* XXX */ 2123914ddf8SEdward Tomasz Napierala .vfs_mount = autofs_mount, 2133914ddf8SEdward Tomasz Napierala .vfs_unmount = autofs_unmount, 2143914ddf8SEdward Tomasz Napierala .vfs_root = autofs_root, 2153914ddf8SEdward Tomasz Napierala .vfs_statfs = autofs_statfs, 2163914ddf8SEdward Tomasz Napierala .vfs_init = autofs_init, 2173914ddf8SEdward Tomasz Napierala .vfs_uninit = autofs_uninit, 2183914ddf8SEdward Tomasz Napierala }; 2193914ddf8SEdward Tomasz Napierala 2203914ddf8SEdward Tomasz Napierala VFS_SET(autofs_vfsops, autofs, VFCF_SYNTHETIC | VFCF_NETWORK); 2213914ddf8SEdward Tomasz Napierala MODULE_VERSION(autofs, 1); 222