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 31925fd945SEdward Tomasz Napierala #include <sys/cdefs.h> 32925fd945SEdward Tomasz Napierala __FBSDID("$FreeBSD$"); 33925fd945SEdward Tomasz Napierala 343914ddf8SEdward Tomasz Napierala #include <sys/param.h> 353914ddf8SEdward Tomasz Napierala #include <sys/systm.h> 363914ddf8SEdward Tomasz Napierala #include <sys/conf.h> 373914ddf8SEdward Tomasz Napierala #include <sys/condvar.h> 383914ddf8SEdward Tomasz Napierala #include <sys/ioccom.h> 393914ddf8SEdward Tomasz Napierala #include <sys/kernel.h> 403914ddf8SEdward Tomasz Napierala #include <sys/module.h> 413914ddf8SEdward Tomasz Napierala #include <sys/mount.h> 423914ddf8SEdward Tomasz Napierala #include <sys/sx.h> 43759489f9SEdward Tomasz Napierala #include <sys/taskqueue.h> 443914ddf8SEdward Tomasz Napierala #include <sys/vnode.h> 453914ddf8SEdward Tomasz Napierala 46f5440d1aSEdward Tomasz Napierala #include <fs/autofs/autofs.h> 473914ddf8SEdward Tomasz Napierala 483914ddf8SEdward Tomasz Napierala static const char *autofs_opts[] = { 493914ddf8SEdward Tomasz Napierala "from", "master_options", "master_prefix", NULL 503914ddf8SEdward Tomasz Napierala }; 513914ddf8SEdward Tomasz Napierala 52f81018caSEdward Tomasz Napierala extern struct autofs_softc *autofs_softc; 533914ddf8SEdward Tomasz Napierala 543914ddf8SEdward Tomasz Napierala static int 553914ddf8SEdward Tomasz Napierala autofs_mount(struct mount *mp) 563914ddf8SEdward Tomasz Napierala { 573914ddf8SEdward Tomasz Napierala struct autofs_mount *amp; 583914ddf8SEdward Tomasz Napierala char *from, *fspath, *options, *prefix; 593914ddf8SEdward Tomasz Napierala int error; 603914ddf8SEdward Tomasz Napierala 613914ddf8SEdward Tomasz Napierala if (vfs_filteropt(mp->mnt_optnew, autofs_opts)) 623914ddf8SEdward Tomasz Napierala return (EINVAL); 633914ddf8SEdward Tomasz Napierala 643914ddf8SEdward Tomasz Napierala if (mp->mnt_flag & MNT_UPDATE) 653914ddf8SEdward Tomasz Napierala return (0); 663914ddf8SEdward Tomasz Napierala 673914ddf8SEdward Tomasz Napierala if (vfs_getopt(mp->mnt_optnew, "from", (void **)&from, NULL)) 683914ddf8SEdward Tomasz Napierala return (EINVAL); 693914ddf8SEdward Tomasz Napierala 703914ddf8SEdward Tomasz Napierala if (vfs_getopt(mp->mnt_optnew, "fspath", (void **)&fspath, NULL)) 713914ddf8SEdward Tomasz Napierala return (EINVAL); 723914ddf8SEdward Tomasz Napierala 733914ddf8SEdward Tomasz Napierala if (vfs_getopt(mp->mnt_optnew, "master_options", (void **)&options, NULL)) 743914ddf8SEdward Tomasz Napierala return (EINVAL); 753914ddf8SEdward Tomasz Napierala 763914ddf8SEdward Tomasz Napierala if (vfs_getopt(mp->mnt_optnew, "master_prefix", (void **)&prefix, NULL)) 773914ddf8SEdward Tomasz Napierala return (EINVAL); 783914ddf8SEdward Tomasz Napierala 793914ddf8SEdward Tomasz Napierala amp = malloc(sizeof(*amp), M_AUTOFS, M_WAITOK | M_ZERO); 803914ddf8SEdward Tomasz Napierala mp->mnt_data = amp; 813914ddf8SEdward Tomasz Napierala amp->am_mp = mp; 823914ddf8SEdward Tomasz Napierala strlcpy(amp->am_from, from, sizeof(amp->am_from)); 833914ddf8SEdward Tomasz Napierala strlcpy(amp->am_mountpoint, fspath, sizeof(amp->am_mountpoint)); 843914ddf8SEdward Tomasz Napierala strlcpy(amp->am_options, options, sizeof(amp->am_options)); 853914ddf8SEdward Tomasz Napierala strlcpy(amp->am_prefix, prefix, sizeof(amp->am_prefix)); 863914ddf8SEdward Tomasz Napierala sx_init(&->am_lock, "autofslk"); 873914ddf8SEdward Tomasz Napierala amp->am_last_fileno = 1; 883914ddf8SEdward Tomasz Napierala 893914ddf8SEdward Tomasz Napierala vfs_getnewfsid(mp); 903914ddf8SEdward Tomasz Napierala 91*2eaebf35SEdward Tomasz Napierala AUTOFS_XLOCK(amp); 923914ddf8SEdward Tomasz Napierala error = autofs_node_new(NULL, amp, ".", -1, &->am_root); 933914ddf8SEdward Tomasz Napierala if (error != 0) { 94*2eaebf35SEdward Tomasz Napierala AUTOFS_XUNLOCK(amp); 953914ddf8SEdward Tomasz Napierala free(amp, M_AUTOFS); 963914ddf8SEdward Tomasz Napierala return (error); 973914ddf8SEdward Tomasz Napierala } 98*2eaebf35SEdward Tomasz Napierala AUTOFS_XUNLOCK(amp); 993914ddf8SEdward Tomasz Napierala 1003914ddf8SEdward Tomasz Napierala vfs_mountedfrom(mp, from); 1013914ddf8SEdward Tomasz Napierala 1023914ddf8SEdward Tomasz Napierala return (0); 1033914ddf8SEdward Tomasz Napierala } 1043914ddf8SEdward Tomasz Napierala 1053914ddf8SEdward Tomasz Napierala static int 1063914ddf8SEdward Tomasz Napierala autofs_unmount(struct mount *mp, int mntflags) 1073914ddf8SEdward Tomasz Napierala { 1083914ddf8SEdward Tomasz Napierala struct autofs_mount *amp; 1093914ddf8SEdward Tomasz Napierala struct autofs_node *anp; 1103914ddf8SEdward Tomasz Napierala struct autofs_request *ar; 1113914ddf8SEdward Tomasz Napierala int error, flags; 1123914ddf8SEdward Tomasz Napierala bool found; 1133914ddf8SEdward Tomasz Napierala 1143914ddf8SEdward Tomasz Napierala amp = VFSTOAUTOFS(mp); 1153914ddf8SEdward Tomasz Napierala 1163914ddf8SEdward Tomasz Napierala flags = 0; 1173914ddf8SEdward Tomasz Napierala if (mntflags & MNT_FORCE) 1183914ddf8SEdward Tomasz Napierala flags |= FORCECLOSE; 1193914ddf8SEdward Tomasz Napierala error = vflush(mp, 0, flags, curthread); 1203914ddf8SEdward Tomasz Napierala if (error != 0) { 1213914ddf8SEdward Tomasz Napierala AUTOFS_WARN("vflush failed with error %d", error); 1223914ddf8SEdward Tomasz Napierala return (error); 1233914ddf8SEdward Tomasz Napierala } 1243914ddf8SEdward Tomasz Napierala 1253914ddf8SEdward Tomasz Napierala /* 1263914ddf8SEdward Tomasz Napierala * All vnodes are gone, and new one will not appear - so, 1273914ddf8SEdward Tomasz Napierala * no new triggerings. We can iterate over outstanding 1283914ddf8SEdward Tomasz Napierala * autofs_requests and terminate them. 1293914ddf8SEdward Tomasz Napierala */ 1303914ddf8SEdward Tomasz Napierala for (;;) { 1313914ddf8SEdward Tomasz Napierala found = false; 132f81018caSEdward Tomasz Napierala sx_xlock(&autofs_softc->sc_lock); 133f81018caSEdward Tomasz Napierala TAILQ_FOREACH(ar, &autofs_softc->sc_requests, ar_next) { 1343914ddf8SEdward Tomasz Napierala if (ar->ar_mount != amp) 1353914ddf8SEdward Tomasz Napierala continue; 1363914ddf8SEdward Tomasz Napierala ar->ar_error = ENXIO; 1373914ddf8SEdward Tomasz Napierala ar->ar_done = true; 1383914ddf8SEdward Tomasz Napierala ar->ar_in_progress = false; 1393914ddf8SEdward Tomasz Napierala found = true; 1403914ddf8SEdward Tomasz Napierala } 141f81018caSEdward Tomasz Napierala sx_xunlock(&autofs_softc->sc_lock); 1423914ddf8SEdward Tomasz Napierala if (found == false) 1433914ddf8SEdward Tomasz Napierala break; 1443914ddf8SEdward Tomasz Napierala 145f81018caSEdward Tomasz Napierala cv_broadcast(&autofs_softc->sc_cv); 1463914ddf8SEdward Tomasz Napierala pause("autofs_umount", 1); 1473914ddf8SEdward Tomasz Napierala } 1483914ddf8SEdward Tomasz Napierala 149*2eaebf35SEdward Tomasz Napierala AUTOFS_XLOCK(amp); 1503914ddf8SEdward Tomasz Napierala 1513914ddf8SEdward Tomasz Napierala /* 1523914ddf8SEdward Tomasz Napierala * Not terribly efficient, but at least not recursive. 1533914ddf8SEdward Tomasz Napierala */ 1543914ddf8SEdward Tomasz Napierala while (!TAILQ_EMPTY(&->am_root->an_children)) { 1553914ddf8SEdward Tomasz Napierala anp = TAILQ_FIRST(&->am_root->an_children); 1563914ddf8SEdward Tomasz Napierala while (!TAILQ_EMPTY(&anp->an_children)) 1573914ddf8SEdward Tomasz Napierala anp = TAILQ_FIRST(&anp->an_children); 1583914ddf8SEdward Tomasz Napierala autofs_node_delete(anp); 1593914ddf8SEdward Tomasz Napierala } 1603914ddf8SEdward Tomasz Napierala autofs_node_delete(amp->am_root); 1613914ddf8SEdward Tomasz Napierala 1623914ddf8SEdward Tomasz Napierala mp->mnt_data = NULL; 163*2eaebf35SEdward Tomasz Napierala AUTOFS_XUNLOCK(amp); 1643914ddf8SEdward Tomasz Napierala 1653914ddf8SEdward Tomasz Napierala sx_destroy(&->am_lock); 1663914ddf8SEdward Tomasz Napierala 1673914ddf8SEdward Tomasz Napierala free(amp, M_AUTOFS); 1683914ddf8SEdward Tomasz Napierala 1693914ddf8SEdward Tomasz Napierala return (0); 1703914ddf8SEdward Tomasz Napierala } 1713914ddf8SEdward Tomasz Napierala 1723914ddf8SEdward Tomasz Napierala static int 1733914ddf8SEdward Tomasz Napierala autofs_root(struct mount *mp, int flags, struct vnode **vpp) 1743914ddf8SEdward Tomasz Napierala { 1753914ddf8SEdward Tomasz Napierala struct autofs_mount *amp; 1763914ddf8SEdward Tomasz Napierala int error; 1773914ddf8SEdward Tomasz Napierala 1783914ddf8SEdward Tomasz Napierala amp = VFSTOAUTOFS(mp); 1793914ddf8SEdward Tomasz Napierala 1803914ddf8SEdward Tomasz Napierala error = autofs_node_vn(amp->am_root, mp, vpp); 1813914ddf8SEdward Tomasz Napierala 1823914ddf8SEdward Tomasz Napierala return (error); 1833914ddf8SEdward Tomasz Napierala } 1843914ddf8SEdward Tomasz Napierala 1853914ddf8SEdward Tomasz Napierala static int 1863914ddf8SEdward Tomasz Napierala autofs_statfs(struct mount *mp, struct statfs *sbp) 1873914ddf8SEdward Tomasz Napierala { 1883914ddf8SEdward Tomasz Napierala 1893914ddf8SEdward Tomasz Napierala sbp->f_bsize = 512; 1903914ddf8SEdward Tomasz Napierala sbp->f_iosize = 0; 1913914ddf8SEdward Tomasz Napierala sbp->f_blocks = 0; 1923914ddf8SEdward Tomasz Napierala sbp->f_bfree = 0; 1933914ddf8SEdward Tomasz Napierala sbp->f_bavail = 0; 1943914ddf8SEdward Tomasz Napierala sbp->f_files = 0; 1953914ddf8SEdward Tomasz Napierala sbp->f_ffree = 0; 1963914ddf8SEdward Tomasz Napierala 1973914ddf8SEdward Tomasz Napierala return (0); 1983914ddf8SEdward Tomasz Napierala } 1993914ddf8SEdward Tomasz Napierala 2003914ddf8SEdward Tomasz Napierala static struct vfsops autofs_vfsops = { 2013914ddf8SEdward Tomasz Napierala .vfs_fhtovp = NULL, /* XXX */ 2023914ddf8SEdward Tomasz Napierala .vfs_mount = autofs_mount, 2033914ddf8SEdward Tomasz Napierala .vfs_unmount = autofs_unmount, 2043914ddf8SEdward Tomasz Napierala .vfs_root = autofs_root, 2053914ddf8SEdward Tomasz Napierala .vfs_statfs = autofs_statfs, 2063914ddf8SEdward Tomasz Napierala .vfs_init = autofs_init, 2073914ddf8SEdward Tomasz Napierala .vfs_uninit = autofs_uninit, 2083914ddf8SEdward Tomasz Napierala }; 2093914ddf8SEdward Tomasz Napierala 2103914ddf8SEdward Tomasz Napierala VFS_SET(autofs_vfsops, autofs, VFCF_SYNTHETIC | VFCF_NETWORK); 2113914ddf8SEdward Tomasz Napierala MODULE_VERSION(autofs, 1); 212