--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usr/src/uts/common/fs/autofs/auto_vfsops.c	Tue Jun 14 00:00:00 2005 -0700
@@ -0,0 +1,835 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/param.h>
+#include <sys/errno.h>
+#include <sys/proc.h>
+#include <sys/disp.h>
+#include <sys/vfs.h>
+#include <sys/vnode.h>
+#include <sys/uio.h>
+#include <sys/kmem.h>
+#include <sys/cred.h>
+#include <sys/statvfs.h>
+#include <sys/mount.h>
+#include <sys/tiuser.h>
+#include <sys/cmn_err.h>
+#include <sys/debug.h>
+#include <sys/mkdev.h>
+#include <sys/systm.h>
+#include <sys/sysmacros.h>
+#include <sys/pathname.h>
+#include <rpc/types.h>
+#include <rpc/auth.h>
+#include <rpc/clnt.h>
+#include <sys/dnlc.h>
+#include <fs/fs_subr.h>
+#include <sys/fs/autofs.h>
+#include <rpcsvc/autofs_prot.h>
+#include <sys/note.h>
+#include <sys/modctl.h>
+#include <sys/mntent.h>
+#include <sys/policy.h>
+#include <sys/zone.h>
+
+static int autofs_init(int, char *);
+
+static major_t autofs_major;
+static minor_t autofs_minor;
+static kmutex_t autofs_minor_lock;
+
+zone_key_t autofs_key;
+
+static mntopts_t auto_mntopts;
+
+/*
+ * The AUTOFS system call.
+ */
+static struct sysent autofssysent = {
+	2,
+	SE_32RVAL1 | SE_ARGC | SE_NOUNLOAD,
+	autofssys
+};
+
+static struct modlsys modlsys = {
+	&mod_syscallops,
+	"AUTOFS syscall",
+	&autofssysent
+};
+
+#ifdef	_SYSCALL32_IMPL
+static struct modlsys  modlsys32 = {
+	&mod_syscallops32,
+	"AUTOFS syscall (32-bit)",
+	&autofssysent
+};
+#endif	/* _SYSCALL32_IMPL */
+
+static vfsdef_t vfw = {
+	VFSDEF_VERSION,
+	"autofs",
+	autofs_init,
+	VSW_HASPROTO|VSW_CANRWRO|VSW_CANREMOUNT,
+	&auto_mntopts
+};
+
+/*
+ * Module linkage information for the kernel.
+ */
+static struct modlfs modlfs = {
+	&mod_fsops, "filesystem for autofs", &vfw
+};
+
+static struct modlinkage modlinkage = {
+	MODREV_1,
+	&modlsys,
+#ifdef	_SYSCALL32_IMPL
+	&modlsys32,
+#endif
+	&modlfs,
+	NULL
+};
+
+/*
+ * There are not enough stubs for rpcmod so we must force load it
+ */
+char _depends_on[] = "strmod/rpcmod misc/rpcsec fs/mntfs";
+
+/*
+ * This is the module initialization routine.
+ */
+int
+_init(void)
+{
+	return (mod_install(&modlinkage));
+}
+
+int
+_fini(void)
+{
+	/*
+	 * Don't allow the autofs module to be unloaded for now.
+	 */
+	return (EBUSY);
+}
+
+int
+_info(struct modinfo *modinfop)
+{
+	return (mod_info(&modlinkage, modinfop));
+}
+
+static int autofs_fstype;
+
+/*
+ * autofs VFS operations
+ */
+static int auto_mount(vfs_t *, vnode_t *, struct mounta *, cred_t *);
+static int auto_unmount(vfs_t *, int, cred_t *);
+static int auto_root(vfs_t *, vnode_t **);
+static int auto_statvfs(vfs_t *, struct statvfs64 *);
+
+/*
+ * Auto Mount options table
+ */
+
+static char *direct_cancel[] = { MNTOPT_INDIRECT, NULL };
+static char *indirect_cancel[] = { MNTOPT_DIRECT, NULL };
+static char *browse_cancel[] = { MNTOPT_NOBROWSE, NULL };
+static char *nobrowse_cancel[] = { MNTOPT_BROWSE, NULL };
+
+static mntopt_t mntopts[] = {
+/*
+ *	option name		cancel options	default arg	flags
+ */
+	{ MNTOPT_DIRECT,	direct_cancel,	NULL,		0,
+		NULL },
+	{ MNTOPT_INDIRECT,	indirect_cancel, NULL,		0,
+		NULL },
+	{ MNTOPT_IGNORE,	NULL,		NULL,
+		MO_DEFAULT|MO_TAG,	NULL },
+	{ "nest",		NULL,		NULL,		MO_TAG,
+		NULL },
+	{ MNTOPT_BROWSE,	browse_cancel,	NULL,		MO_TAG,
+		NULL },
+	{ MNTOPT_NOBROWSE,	nobrowse_cancel, NULL,		MO_TAG,
+		NULL },
+	{ MNTOPT_RESTRICT,	NULL,		NULL,		MO_TAG,
+		NULL },
+};
+
+static mntopts_t auto_mntopts = {
+	sizeof (mntopts) / sizeof (mntopt_t),
+	mntopts
+};
+
+/*ARGSUSED*/
+static void
+autofs_zone_destructor(zoneid_t zoneid, void *arg)
+{
+	struct autofs_globals *fngp = arg;
+	vnode_t *vp;
+
+	if (fngp == NULL)
+		return;
+	ASSERT(fngp->fng_fnnode_count == 1);
+	ASSERT(fngp->fng_unmount_threads == 0);
+	/*
+	 * vn_alloc() initialized the rootnode with a count of 1; we need to
+	 * make this 0 to placate auto_freefnnode().
+	 */
+	vp = fntovn(fngp->fng_rootfnnodep);
+	ASSERT(vp->v_count == 1);
+	vp->v_count--;
+	auto_freefnnode(fngp->fng_rootfnnodep);
+	mutex_destroy(&fngp->fng_unmount_threads_lock);
+	kmem_free(fngp, sizeof (*fngp));
+}
+
+/*
+ * rootfnnodep is allocated here.  Its sole purpose is to provide
+ * read/write locking for top level fnnodes.  This object is
+ * persistent and will not be deallocated until the zone is destroyed.
+ *
+ * The current zone is implied as the zone of interest, since we will be
+ * calling zthread_create() which must be called from the correct zone.
+ */
+static struct autofs_globals *
+autofs_zone_init(void)
+{
+	char rootname[sizeof ("root_fnnode_zone_") + ZONEID_WIDTH];
+	struct autofs_globals *fngp;
+	zoneid_t zoneid = getzoneid();
+
+	fngp = kmem_zalloc(sizeof (*fngp), KM_SLEEP);
+	(void) snprintf(rootname, sizeof (rootname), "root_fnnode_zone_%d",
+	    zoneid);
+	fngp->fng_rootfnnodep = auto_makefnnode(VNON, NULL, rootname, CRED(),
+	    fngp);
+	/*
+	 * Don't need to hold fng_rootfnnodep as it's never really used for
+	 * anything.
+	 */
+	fngp->fng_fnnode_count = 1;
+	fngp->fng_printed_not_running_msg = 0;
+	fngp->fng_zoneid = zoneid;
+	mutex_init(&fngp->fng_unmount_threads_lock, NULL, MUTEX_DEFAULT,
+	    NULL);
+	fngp->fng_unmount_threads = 0;
+
+	/*
+	 * Start the unmounter thread for this zone.
+	 */
+	(void) zthread_create(NULL, 0, auto_do_unmount, fngp, 0, minclsyspri);
+	return (fngp);
+}
+
+int
+autofs_init(int fstype, char *name)
+{
+	static const fs_operation_def_t auto_vfsops_template[] = {
+		VFSNAME_MOUNT, auto_mount,
+		VFSNAME_UNMOUNT, auto_unmount,
+		VFSNAME_ROOT, auto_root,
+		VFSNAME_STATVFS, auto_statvfs,
+		NULL, NULL
+	};
+	int error;
+
+	autofs_fstype = fstype;
+	ASSERT(autofs_fstype != 0);
+	/*
+	 * Associate VFS ops vector with this fstype
+	 */
+	error = vfs_setfsops(fstype, auto_vfsops_template, NULL);
+	if (error != 0) {
+		cmn_err(CE_WARN, "autofs_init: bad vfs ops template");
+		return (error);
+	}
+
+	error = vn_make_ops(name, auto_vnodeops_template, &auto_vnodeops);
+	if (error != 0) {
+		(void) vfs_freevfsops_by_type(fstype);
+		cmn_err(CE_WARN, "autofs_init: bad vnode ops template");
+		return (error);
+	}
+
+	mutex_init(&autofs_minor_lock, NULL, MUTEX_DEFAULT, NULL);
+	/*
+	 * Assign unique major number for all autofs mounts
+	 */
+	if ((autofs_major = getudev()) == (major_t)-1) {
+		cmn_err(CE_WARN,
+		    "autofs: autofs_init: can't get unique device number");
+		mutex_destroy(&autofs_minor_lock);
+		return (1);
+	}
+
+	/*
+	 * We'd like to be able to provide a constructor here, but we can't
+	 * since it wants to zthread_create(), something it can't do in a ZSD
+	 * constructor.
+	 */
+	zone_key_create(&autofs_key, NULL, NULL, autofs_zone_destructor);
+
+	return (0);
+}
+
+static char *restropts[] = {
+	RESTRICTED_MNTOPTS
+};
+
+/*
+ * This routine adds those options to the option string `buf' which are
+ * forced by secpolicy_fs_mount.  If the automatic "security" options
+ * are set, the option string gets them added if they aren't already
+ * there.  We search the string with "strstr" and make sure that
+ * the string we find is bracketed with <start|",">MNTOPT<","|"\0">
+ *
+ * This is one half of the option inheritence algorithm which
+ * implements the "restrict" option.  The other half is implemented
+ * in automountd; it takes its cue from the options we add here.
+ */
+static int
+autofs_restrict_opts(struct vfs *vfsp, char *buf, size_t maxlen, size_t *curlen)
+{
+	int i;
+	char *p;
+	size_t len = *curlen - 1;
+
+	/* Unrestricted */
+	if (!vfs_optionisset(vfsp, restropts[0], NULL))
+		return (0);
+
+	for (i = 0; i < sizeof (restropts)/sizeof (restropts[0]); i++) {
+		size_t olen = strlen(restropts[i]);
+
+		/* Add "restrict" always and the others insofar set */
+		if ((i == 0 || vfs_optionisset(vfsp, restropts[i], NULL)) &&
+		    ((p = strstr(buf, restropts[i])) == NULL ||
+		    !((p == buf || p[-1] == ',') &&
+		    (p[olen] == '\0' || p[olen] == ',')))) {
+
+			if (len + olen + 1 > maxlen)
+				return (-1);
+
+			if (*buf != '\0')
+				buf[len++] = ',';
+			(void) strcpy(&buf[len], restropts[i]);
+			len += olen;
+		}
+	}
+	*curlen = len + 1;
+	return (0);
+}
+
+/* ARGSUSED */
+static int
+auto_mount(vfs_t *vfsp, vnode_t *vp, struct mounta *uap, cred_t *cr)
+{
+	int error;
+	size_t len = 0;
+	struct autofs_args args;
+	fninfo_t *fnip = NULL;
+	vnode_t *rootvp = NULL;
+	fnnode_t *rootfnp = NULL;
+	char *data = uap->dataptr;
+	char datalen = uap->datalen;
+	dev_t autofs_dev;
+	char strbuff[MAXPATHLEN+1];
+	vnode_t *kvp;
+	struct autofs_globals *fngp;
+	zone_t *zone = curproc->p_zone;
+
+	AUTOFS_DPRINT((4, "auto_mount: vfs %p vp %p\n", (void *)vfsp,
+	    (void *)vp));
+
+	if ((error = secpolicy_fs_mount(cr, vp, vfsp)) != 0)
+		return (EPERM);
+
+	if (zone == global_zone) {
+		zone_t *mntzone;
+
+		mntzone = zone_find_by_path(refstr_value(vfsp->vfs_mntpt));
+		ASSERT(mntzone != NULL);
+		zone_rele(mntzone);
+		if (mntzone != zone) {
+			return (EBUSY);
+		}
+	}
+
+	/*
+	 * Stop the mount from going any further if the zone is going away.
+	 */
+	if (zone_status_get(zone) >= ZONE_IS_SHUTTING_DOWN)
+		return (EBUSY);
+
+	/*
+	 * We need a lock to serialize this; minor_lock is as good as any.
+	 */
+	mutex_enter(&autofs_minor_lock);
+	if ((fngp = zone_getspecific(autofs_key, zone)) == NULL) {
+		fngp = autofs_zone_init();
+		(void) zone_setspecific(autofs_key, zone, fngp);
+	}
+	mutex_exit(&autofs_minor_lock);
+	ASSERT(fngp != NULL);
+
+	/*
+	 * Get arguments
+	 */
+	if (uap->flags & MS_SYSSPACE) {
+		if (datalen != sizeof (args))
+			return (EINVAL);
+		error = kcopy(data, &args, sizeof (args));
+	} else {
+		if (get_udatamodel() == DATAMODEL_NATIVE) {
+			if (datalen != sizeof (args))
+				return (EINVAL);
+			error = copyin(data, &args, sizeof (args));
+		} else {
+			struct autofs_args32 args32;
+
+			if (datalen != sizeof (args32))
+				return (EINVAL);
+			error = copyin(data, &args32, sizeof (args32));
+
+			args.addr.maxlen = args32.addr.maxlen;
+			args.addr.len = args32.addr.len;
+			args.addr.buf = (char *)(uintptr_t)args32.addr.buf;
+			args.path = (char *)(uintptr_t)args32.path;
+			args.opts = (char *)(uintptr_t)args32.opts;
+			args.map = (char *)(uintptr_t)args32.map;
+			args.subdir = (char *)(uintptr_t)args32.subdir;
+			args.key = (char *)(uintptr_t)args32.key;
+			args.mount_to = args32.mount_to;
+			args.rpc_to = args32.rpc_to;
+			args.direct = args32.direct;
+		}
+	}
+	if (error)
+		return (EFAULT);
+
+	/*
+	 * For a remount, only update mount information
+	 * i.e. default mount options, map name, etc.
+	 */
+	if (uap->flags & MS_REMOUNT) {
+		fnip = vfstofni(vfsp);
+		if (fnip == NULL)
+			return (EINVAL);
+
+		if (args.direct == 1)
+			fnip->fi_flags |= MF_DIRECT;
+		else
+			fnip->fi_flags &= ~MF_DIRECT;
+		fnip->fi_mount_to = args.mount_to;
+		fnip->fi_rpc_to = args.rpc_to;
+
+		/*
+		 * Get default options
+		 */
+		if (uap->flags & MS_SYSSPACE)
+			error = copystr(args.opts, strbuff, sizeof (strbuff),
+			    &len);
+		else
+			error = copyinstr(args.opts, strbuff, sizeof (strbuff),
+			    &len);
+		if (error)
+			return (EFAULT);
+
+		if (autofs_restrict_opts(vfsp, strbuff, sizeof (strbuff), &len)
+		    != 0) {
+			return (EFAULT);
+		}
+
+		kmem_free(fnip->fi_opts, fnip->fi_optslen);
+		fnip->fi_opts = kmem_alloc(len, KM_SLEEP);
+		fnip->fi_optslen = (int)len;
+		bcopy(strbuff, fnip->fi_opts, len);
+
+		/*
+		 * Get context/map name
+		 */
+		if (uap->flags & MS_SYSSPACE)
+			error = copystr(args.map, strbuff, sizeof (strbuff),
+			    &len);
+		else
+			error = copyinstr(args.map, strbuff, sizeof (strbuff),
+			    &len);
+		if (error)
+			return (EFAULT);
+
+		kmem_free(fnip->fi_map, fnip->fi_maplen);
+		fnip->fi_map = kmem_alloc(len, KM_SLEEP);
+		fnip->fi_maplen = (int)len;
+		bcopy(strbuff, fnip->fi_map, len);
+
+		return (0);
+	}
+
+	/*
+	 * Allocate fninfo struct and attach it to vfs
+	 */
+	fnip = kmem_zalloc(sizeof (*fnip), KM_SLEEP);
+	fnip->fi_mountvfs = vfsp;
+
+	fnip->fi_mount_to = args.mount_to;
+	fnip->fi_rpc_to = args.rpc_to;
+	fnip->fi_refcnt = 0;
+	vfsp->vfs_bsize = AUTOFS_BLOCKSIZE;
+	vfsp->vfs_fstype = autofs_fstype;
+
+	/*
+	 * Assign a unique device id to the mount
+	 */
+	mutex_enter(&autofs_minor_lock);
+	do {
+		autofs_minor = (autofs_minor + 1) & L_MAXMIN32;
+		autofs_dev = makedevice(autofs_major, autofs_minor);
+	} while (vfs_devismounted(autofs_dev));
+	mutex_exit(&autofs_minor_lock);
+	vfsp->vfs_dev = autofs_dev;
+	vfs_make_fsid(&vfsp->vfs_fsid, autofs_dev, autofs_fstype);
+	vfsp->vfs_data = (void *)fnip;
+	vfsp->vfs_bcount = 0;
+
+	/*
+	 * Get daemon address
+	 */
+	fnip->fi_addr.len = args.addr.len;
+	fnip->fi_addr.maxlen = fnip->fi_addr.len;
+	fnip->fi_addr.buf = kmem_alloc(args.addr.len, KM_SLEEP);
+	if (uap->flags & MS_SYSSPACE)
+		error = kcopy(args.addr.buf, fnip->fi_addr.buf, args.addr.len);
+	else
+		error = copyin(args.addr.buf, fnip->fi_addr.buf, args.addr.len);
+	if (error) {
+		error = EFAULT;
+		goto errout;
+	}
+
+	fnip->fi_zoneid = getzoneid();
+	/*
+	 * Get path for mountpoint
+	 */
+	if (uap->flags & MS_SYSSPACE)
+		error = copystr(args.path, strbuff, sizeof (strbuff), &len);
+	else
+		error = copyinstr(args.path, strbuff, sizeof (strbuff), &len);
+	if (error) {
+		error = EFAULT;
+		goto errout;
+	}
+	fnip->fi_path = kmem_alloc(len, KM_SLEEP);
+	fnip->fi_pathlen = (int)len;
+	bcopy(strbuff, fnip->fi_path, len);
+
+	/*
+	 * Get default options
+	 */
+	if (uap->flags & MS_SYSSPACE)
+		error = copystr(args.opts, strbuff, sizeof (strbuff), &len);
+	else
+		error = copyinstr(args.opts, strbuff, sizeof (strbuff), &len);
+
+	if (error != 0 ||
+	    autofs_restrict_opts(vfsp, strbuff, sizeof (strbuff), &len) != 0) {
+		error = EFAULT;
+		goto errout;
+	}
+	fnip->fi_opts = kmem_alloc(len, KM_SLEEP);
+	fnip->fi_optslen = (int)len;
+	bcopy(strbuff, fnip->fi_opts, len);
+
+	/*
+	 * Get context/map name
+	 */
+	if (uap->flags & MS_SYSSPACE)
+		error = copystr(args.map, strbuff, sizeof (strbuff), &len);
+	else
+		error = copyinstr(args.map, strbuff, sizeof (strbuff), &len);
+	if (error) {
+		error = EFAULT;
+		goto errout;
+	}
+	fnip->fi_map = kmem_alloc(len, KM_SLEEP);
+	fnip->fi_maplen = (int)len;
+	bcopy(strbuff, fnip->fi_map, len);
+
+	/*
+	 * Get subdirectory within map
+	 */
+	if (uap->flags & MS_SYSSPACE)
+		error = copystr(args.subdir, strbuff, sizeof (strbuff), &len);
+	else
+		error = copyinstr(args.subdir, strbuff, sizeof (strbuff), &len);
+	if (error) {
+		error = EFAULT;
+		goto errout;
+	}
+	fnip->fi_subdir = kmem_alloc(len, KM_SLEEP);
+	fnip->fi_subdirlen = (int)len;
+	bcopy(strbuff, fnip->fi_subdir, len);
+
+	/*
+	 * Get the key
+	 */
+	if (uap->flags & MS_SYSSPACE)
+		error = copystr(args.key, strbuff, sizeof (strbuff), &len);
+	else
+		error = copyinstr(args.key, strbuff, sizeof (strbuff), &len);
+	if (error) {
+		error = EFAULT;
+		goto errout;
+	}
+	fnip->fi_key = kmem_alloc(len, KM_SLEEP);
+	fnip->fi_keylen = (int)len;
+	bcopy(strbuff, fnip->fi_key, len);
+
+	/*
+	 * Is this a direct mount?
+	 */
+	if (args.direct == 1)
+		fnip->fi_flags |= MF_DIRECT;
+
+	/*
+	 * Setup netconfig.
+	 * Can I pass in knconf as mount argument? what
+	 * happens when the daemon gets restarted?
+	 */
+	if ((error = lookupname("/dev/ticotsord", UIO_SYSSPACE, FOLLOW,
+	    NULLVPP, &kvp)) != 0) {
+		cmn_err(CE_WARN, "autofs: lookupname: %d", error);
+		goto errout;
+	}
+
+	fnip->fi_knconf.knc_rdev = kvp->v_rdev;
+	fnip->fi_knconf.knc_protofmly = NC_LOOPBACK;
+	fnip->fi_knconf.knc_semantics = NC_TPI_COTS_ORD;
+	VN_RELE(kvp);
+
+	/*
+	 * Make the root vnode
+	 */
+	rootfnp = auto_makefnnode(VDIR, vfsp, fnip->fi_path, cr, fngp);
+	if (rootfnp == NULL) {
+		error = ENOMEM;
+		goto errout;
+	}
+	rootvp = fntovn(rootfnp);
+
+	rootvp->v_flag |= VROOT;
+	rootfnp->fn_mode = AUTOFS_MODE;
+	rootfnp->fn_parent = rootfnp;
+	/* account for ".." entry */
+	rootfnp->fn_linkcnt = rootfnp->fn_size = 1;
+	fnip->fi_rootvp = rootvp;
+
+	/*
+	 * Add to list of top level AUTOFS' if it is being mounted by
+	 * a user level process.
+	 */
+	if (!(uap->flags & MS_SYSSPACE)) {
+		rw_enter(&fngp->fng_rootfnnodep->fn_rwlock, RW_WRITER);
+		rootfnp->fn_parent = fngp->fng_rootfnnodep;
+		rootfnp->fn_next = fngp->fng_rootfnnodep->fn_dirents;
+		fngp->fng_rootfnnodep->fn_dirents = rootfnp;
+		rw_exit(&fngp->fng_rootfnnodep->fn_rwlock);
+	}
+
+	AUTOFS_DPRINT((5, "auto_mount: vfs %p root %p fnip %p return %d\n",
+	    (void *)vfsp, (void *)rootvp, (void *)fnip, error));
+
+	return (0);
+
+errout:
+	ASSERT(fnip != NULL);
+	ASSERT((uap->flags & MS_REMOUNT) == 0);
+
+	if (fnip->fi_addr.buf != NULL)
+		kmem_free(fnip->fi_addr.buf, fnip->fi_addr.len);
+	if (fnip->fi_path != NULL)
+		kmem_free(fnip->fi_path, fnip->fi_pathlen);
+	if (fnip->fi_opts != NULL)
+		kmem_free(fnip->fi_opts, fnip->fi_optslen);
+	if (fnip->fi_map != NULL)
+		kmem_free(fnip->fi_map, fnip->fi_maplen);
+	if (fnip->fi_subdir != NULL)
+		kmem_free(fnip->fi_subdir, fnip->fi_subdirlen);
+	if (fnip->fi_key != NULL)
+		kmem_free(fnip->fi_key, fnip->fi_keylen);
+	kmem_free(fnip, sizeof (*fnip));
+
+	AUTOFS_DPRINT((5, "auto_mount: vfs %p root %p fnip %p return %d\n",
+	    (void *)vfsp, (void *)rootvp, (void *)fnip, error));
+
+	return (error);
+}
+
+/* ARGSUSED */
+static int
+auto_unmount(vfs_t *vfsp, int flag, cred_t *cr)
+{
+	fninfo_t *fnip;
+	vnode_t *rvp;
+	fnnode_t *rfnp, *fnp, *pfnp;
+	fnnode_t *myrootfnnodep;
+
+	fnip = vfstofni(vfsp);
+	AUTOFS_DPRINT((4, "auto_unmount vfsp %p fnip %p\n", (void *)vfsp,
+			(void *)fnip));
+
+	if (secpolicy_fs_unmount(cr, vfsp) != 0)
+		return (EPERM);
+	/*
+	 * forced unmount is not supported by this file system
+	 * and thus, ENOTSUP, is being returned.
+	 */
+	if (flag & MS_FORCE)
+		return (ENOTSUP);
+
+	ASSERT(vn_vfswlock_held(vfsp->vfs_vnodecovered));
+	rvp = fnip->fi_rootvp;
+	rfnp = vntofn(rvp);
+
+	if (rvp->v_count > 1 || rfnp->fn_dirents != NULL)
+		return (EBUSY);
+
+	/*
+	 * The root vnode is on the linked list of root fnnodes only if
+	 * this was not a trigger node. Since we have no way of knowing,
+	 * if we don't find it, then we assume it was a trigger node.
+	 */
+	myrootfnnodep = rfnp->fn_globals->fng_rootfnnodep;
+	pfnp = NULL;
+	rw_enter(&myrootfnnodep->fn_rwlock, RW_WRITER);
+	fnp = myrootfnnodep->fn_dirents;
+	while (fnp != NULL) {
+		if (fnp == rfnp) {
+			/*
+			 * A check here is made to see if rvp is busy.  If
+			 * so, return EBUSY.  Otherwise proceed with
+			 * disconnecting it from the list.
+			 */
+			if (rvp->v_count > 1 || rfnp->fn_dirents != NULL) {
+				rw_exit(&myrootfnnodep->fn_rwlock);
+				return (EBUSY);
+			}
+			if (pfnp)
+				pfnp->fn_next = fnp->fn_next;
+			else
+				myrootfnnodep->fn_dirents = fnp->fn_next;
+			fnp->fn_next = NULL;
+			break;
+		}
+		pfnp = fnp;
+		fnp = fnp->fn_next;
+	}
+	rw_exit(&myrootfnnodep->fn_rwlock);
+
+	ASSERT(rvp->v_count == 1);
+	ASSERT(rfnp->fn_size == 1);
+	ASSERT(rfnp->fn_linkcnt == 1);
+	/*
+	 * The following drops linkcnt to 0, therefore the disconnect is
+	 * not attempted when auto_inactive() is called by
+	 * vn_rele(). This is necessary because we have nothing to get
+	 * disconnected from since we're the root of the filesystem. As a
+	 * side effect the node is not freed, therefore I should free the
+	 * node here.
+	 *
+	 * XXX - I really need to think of a better way of doing this.
+	 */
+	rfnp->fn_size--;
+	rfnp->fn_linkcnt--;
+
+	/*
+	 * release of last reference causes node
+	 * to be freed
+	 */
+	VN_RELE(rvp);
+	rfnp->fn_parent = NULL;
+
+	auto_freefnnode(rfnp);
+
+	kmem_free(fnip->fi_addr.buf, fnip->fi_addr.len);
+	kmem_free(fnip->fi_path, fnip->fi_pathlen);
+	kmem_free(fnip->fi_map, fnip->fi_maplen);
+	kmem_free(fnip->fi_subdir, fnip->fi_subdirlen);
+	kmem_free(fnip->fi_key, fnip->fi_keylen);
+	kmem_free(fnip->fi_opts, fnip->fi_optslen);
+	kmem_free(fnip, sizeof (*fnip));
+	AUTOFS_DPRINT((5, "auto_unmount: return=0\n"));
+
+	return (0);
+}
+
+
+/*
+ * find root of autofs
+ */
+static int
+auto_root(vfs_t *vfsp, vnode_t **vpp)
+{
+	*vpp = (vnode_t *)vfstofni(vfsp)->fi_rootvp;
+	VN_HOLD(*vpp);
+
+	AUTOFS_DPRINT((5, "auto_root: vfs %p, *vpp %p\n", (void *)vfsp,
+	    (void *)*vpp));
+	return (0);
+}
+
+/*
+ * Get file system statistics.
+ */
+static int
+auto_statvfs(vfs_t *vfsp, struct statvfs64 *sbp)
+{
+	dev32_t d32;
+
+	AUTOFS_DPRINT((4, "auto_statvfs %p\n", (void *)vfsp));
+
+	bzero(sbp, sizeof (*sbp));
+	sbp->f_bsize	= vfsp->vfs_bsize;
+	sbp->f_frsize	= sbp->f_bsize;
+	sbp->f_blocks	= (fsblkcnt64_t)0;
+	sbp->f_bfree	= (fsblkcnt64_t)0;
+	sbp->f_bavail	= (fsblkcnt64_t)0;
+	sbp->f_files	= (fsfilcnt64_t)0;
+	sbp->f_ffree	= (fsfilcnt64_t)0;
+	sbp->f_favail	= (fsfilcnt64_t)0;
+	(void) cmpldev(&d32, vfsp->vfs_dev);
+	sbp->f_fsid	= d32;
+	(void) strcpy(sbp->f_basetype, vfssw[vfsp->vfs_fstype].vsw_name);
+	sbp->f_flag = vf_to_stf(vfsp->vfs_flag);
+	sbp->f_namemax = MAXNAMELEN;
+	(void) strcpy(sbp->f_fstr, MNTTYPE_AUTOFS);
+
+	return (0);
+}