fs/autofs/auto_sys.c

	auto_sys.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * 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/types.h>
#include <sys/systm.h>
#include <sys/zone.h>
#include <sys/errno.h>
#include <sys/cred.h>
#include <sys/policy.h>

#include <sys/fs/autofs.h>

int
autofssys(enum autofssys_op opcode, uintptr_t arg)
{
    int error = 0;

    switch (opcode) {
    case AUTOFS_UNMOUNTALL: { /* attempt to remove all autofs mounts */
        zone_t *zone;
        zoneid_t zoneid;
        struct autofs_globals *fngp;

        zoneid = (zoneid_t)arg;
        if (secpolicy_fs_unmount(CRED(), NULL) != 0 ||
            crgetzoneid(CRED()) != GLOBAL_ZONEID)
            return (set_errno(EPERM));
        if ((zone = zone_find_by_id(zoneid)) == NULL)
            return (set_errno(EINVAL));
        fngp = zone_getspecific(autofs_key, zone);
        if (fngp == NULL) {
            zone_rele(zone);
            /*
             * There were no mounts, so no work to do. Success.
             */
            return (0);
        }
        unmount_tree(fngp, 1);
        zone_rele(zone);
        break;
    }
    default:
        error = EINVAL;
        break;
    }
    return (error ? set_errno(error) : 0);
}