NetBSD/sys/kern/vfs_quotactl.c

/*	$NetBSD: vfs_quotactl.c,v 1.6 2012/01/29 06:36:50 dholland Exp $	*/

/*
 * Copyright (c) 1991, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 * (c) UNIX System Laboratories, Inc.
 * All or some portions of this file are derived from material licensed
 * to the University of California by American Telephone and Telegraph
 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)ufs_vfsops.c	8.8 (Berkeley) 5/20/95
 *	From NetBSD: ufs_vfsops.c,v 1.42 2011/03/24 17:05:46 bouyer Exp
 */

/*
 * Copyright (c) 1982, 1986, 1990, 1993, 1995
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Robert Elz at The University of Melbourne.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)ufs_quota.c	8.5 (Berkeley) 5/20/95
 *	From NetBSD: ufs_quota.c,v 1.70 2011/03/24 17:05:46 bouyer Exp
 */

/*
 * Note that both of the copyrights above are moderately spurious;
 * this code should almost certainly have the Copyright 2010 Manuel
 * Bouyer notice and license found in e.g. sys/ufs/ufs/quota2_subr.c.
 * However, they're what was on the files this code was sliced out of.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: vfs_quotactl.c,v 1.6 2012/01/29 06:36:50 dholland Exp $");

#include <sys/mount.h>
#include <sys/quotactl.h>
#include <quota/quotaprop.h>

static int
vfs_quotactl_getversion(struct mount *mp,
			prop_dictionary_t cmddict, int q2type,
			prop_array_t datas)
{
	prop_array_t replies;
	prop_dictionary_t data;
	int q2version;
	struct vfs_quotactl_args args;
	int error;

	KASSERT(prop_object_type(cmddict) == PROP_TYPE_DICTIONARY);
	KASSERT(prop_object_type(datas) == PROP_TYPE_ARRAY);

	args.qc_type = QCT_GETVERSION;
	args.u.getversion.qc_version_ret = &q2version;
	error = VFS_QUOTACTL(mp, QUOTACTL_GETVERSION, &args);
	if (error) {
		return error;
	}

	data = prop_dictionary_create();
	if (data == NULL) {
		return ENOMEM;
	}

	if (!prop_dictionary_set_int8(data, "version", q2version)) {
		prop_object_release(data);
		return ENOMEM;
	}

	replies = prop_array_create();
	if (replies == NULL) {
		prop_object_release(data);
		return ENOMEM;
	}

	if (!prop_array_add_and_rel(replies, data)) {
		prop_object_release(data);
		prop_object_release(replies);
		return ENOMEM;
	}

	if (!prop_dictionary_set_and_rel(cmddict, "data", replies)) {
		prop_object_release(replies);
		return ENOMEM;
	}

	return error;
}

static int
vfs_quotactl_quotaon(struct mount *mp,
		     prop_dictionary_t cmddict, int q2type,
		     prop_array_t datas)
{
	struct vfs_quotactl_args args;

	args.qc_type = QCT_PROPLIB;
	args.u.proplib.qc_cmddict = cmddict;
	args.u.proplib.qc_q2type = q2type;
	args.u.proplib.qc_datas = datas;
	return VFS_QUOTACTL(mp, QUOTACTL_QUOTAON, &args);
}

static int
vfs_quotactl_quotaoff(struct mount *mp,
			prop_dictionary_t cmddict, int q2type,
			prop_array_t datas)
{
	struct vfs_quotactl_args args;

	args.qc_type = QCT_PROPLIB;
	args.u.proplib.qc_cmddict = cmddict;
	args.u.proplib.qc_q2type = q2type;
	args.u.proplib.qc_datas = datas;
	return VFS_QUOTACTL(mp, QUOTACTL_QUOTAOFF, &args);
}

static int
vfs_quotactl_get(struct mount *mp,
			prop_dictionary_t cmddict, int q2type,
			prop_array_t datas)
{
	struct vfs_quotactl_args args;

	args.qc_type = QCT_PROPLIB;
	args.u.proplib.qc_cmddict = cmddict;
	args.u.proplib.qc_q2type = q2type;
	args.u.proplib.qc_datas = datas;
	return VFS_QUOTACTL(mp, QUOTACTL_GET, &args);
}

static int
vfs_quotactl_set(struct mount *mp,
			prop_dictionary_t cmddict, int q2type,
			prop_array_t datas)
{
	struct vfs_quotactl_args args;

	args.qc_type = QCT_PROPLIB;
	args.u.proplib.qc_cmddict = cmddict;
	args.u.proplib.qc_q2type = q2type;
	args.u.proplib.qc_datas = datas;
	return VFS_QUOTACTL(mp, QUOTACTL_SET, &args);
}

static int
vfs_quotactl_getall(struct mount *mp,
			prop_dictionary_t cmddict, int q2type,
			prop_array_t datas)
{
	struct vfs_quotactl_args args;

	args.qc_type = QCT_PROPLIB;
	args.u.proplib.qc_cmddict = cmddict;
	args.u.proplib.qc_q2type = q2type;
	args.u.proplib.qc_datas = datas;
	return VFS_QUOTACTL(mp, QUOTACTL_GETALL, &args);
}

static int
vfs_quotactl_clear(struct mount *mp,
			prop_dictionary_t cmddict, int q2type,
			prop_array_t datas)
{
	struct vfs_quotactl_args args;

	args.qc_type = QCT_PROPLIB;
	args.u.proplib.qc_cmddict = cmddict;
	args.u.proplib.qc_q2type = q2type;
	args.u.proplib.qc_datas = datas;
	return VFS_QUOTACTL(mp, QUOTACTL_CLEAR, &args);
}

static int
vfs_quotactl_cmd(struct mount *mp, prop_dictionary_t cmddict)
{
	int error;
	const char *cmd, *type;
	prop_array_t datas;
	int q2type;

	if (!prop_dictionary_get_cstring_nocopy(cmddict, "command", &cmd))
		return EINVAL;
	if (!prop_dictionary_get_cstring_nocopy(cmddict, "type", &type))
		return EINVAL;

	if (!strcmp(type, QUOTADICT_CLASS_USER)) {
		q2type = QUOTA_CLASS_USER;
	} else if (!strcmp(type, QUOTADICT_CLASS_GROUP)) {
		q2type = QUOTA_CLASS_GROUP;
	} else {
		/* XXX this is a bad errno for this case */
		return EOPNOTSUPP;
	}

	datas = prop_dictionary_get(cmddict, "data");
	if (datas == NULL || prop_object_type(datas) != PROP_TYPE_ARRAY)
		return EINVAL;

	prop_object_retain(datas);
	prop_dictionary_remove(cmddict, "data"); /* prepare for return */

	if (strcmp(cmd, "get version") == 0) {
		error = vfs_quotactl_getversion(mp, cmddict, q2type, datas);
	} else if (strcmp(cmd, "quotaon") == 0) {
		error = vfs_quotactl_quotaon(mp, cmddict, q2type, datas);
	} else if (strcmp(cmd, "quotaoff") == 0) {
		error = vfs_quotactl_quotaoff(mp, cmddict, q2type, datas);
	} else if (strcmp(cmd, "get") == 0) {
		error = vfs_quotactl_get(mp, cmddict, q2type, datas);
	} else if (strcmp(cmd, "set") == 0) {
		error = vfs_quotactl_set(mp, cmddict, q2type, datas);
	} else if (strcmp(cmd, "getall") == 0) {
		error = vfs_quotactl_getall(mp, cmddict, q2type, datas);
	} else if (strcmp(cmd, "clear") == 0) {
		error = vfs_quotactl_clear(mp, cmddict, q2type, datas);
	} else {
		/* XXX this a bad errno for this case */
		error = EOPNOTSUPP;
	}

	error = (prop_dictionary_set_int8(cmddict, "return",
	    error) ? 0 : ENOMEM);
	prop_object_release(datas);

	return error;
}

int
vfs_quotactl(struct mount *mp, prop_dictionary_t dict)
{
	prop_dictionary_t cmddict;
	prop_array_t commands;
	prop_object_iterator_t iter;
	int error;

	error = quota_get_cmds(dict, &commands);
	if (error) {
		return error;
	}

	iter = prop_array_iterator(commands);
	if (iter == NULL) {
		return ENOMEM;
	}

	while ((cmddict = prop_object_iterator_next(iter)) != NULL) {
		if (prop_object_type(cmddict) != PROP_TYPE_DICTIONARY) {
			/* XXX shouldn't this be an error? */
			continue;
		}
		error = vfs_quotactl_cmd(mp, cmddict);
		if (error) {
			break;
		}
	}
	prop_object_iterator_release(iter);
	return error;
}