/* $NetBSD: quota_cursor.c,v 1.6 2012/02/01 05:46:46 dholland Exp $ */

/* $NetBSD: quota_cursor.c,v 1.6 2012/02/01 05:46:46 dholland Exp $ */
/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by David A. Holland.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/

#include <sys/cdefs.h>
__RCSID("$NetBSD: quota_cursor.c,v 1.6 2012/02/01 05:46:46 dholland Exp $");

#include <stdlib.h>
#include <errno.h>

#include <quota.h>
#include "quotapvt.h"

struct quotacursor *
quota_opencursor(struct quotahandle *qh)
{
struct quotacursor *qc;
unsigned restrictions;
int serrno;

switch (qh->qh_mode) {
case QUOTA_MODE_NFS:
errno = EOPNOTSUPP;
return NULL;

case QUOTA_MODE_OLDFILES:
restrictions = QUOTA_RESTRICT_NEEDSQUOTACHECK;
break;

case QUOTA_MODE_KERNEL:
restrictions = __quota_kernel_getrestrictions(qh);
break;

default:
errno = EINVAL;
return NULL;
}

/*
* For the time being at least the version 1 kernel code
* cannot do cursors.
*/
if ((restrictions & QUOTA_RESTRICT_NEEDSQUOTACHECK) != 0 &&
!qh->qh_oldfilesopen) {
if (__quota_oldfiles_initialize(qh)) {
return NULL;
}
}

qc = malloc(sizeof(*qc));
if (qc == NULL) {
return NULL;
}

qc->qc_qh = qh;

if ((restrictions & QUOTA_RESTRICT_NEEDSQUOTACHECK) != 0) {
qc->qc_type = QC_OLDFILES;
qc->u.qc_oldfiles = __quota_oldfiles_cursor_create(qh);
if (qc->u.qc_oldfiles == NULL) {
serrno = errno;
free(qc);
errno = serrno;
return NULL;
}
} else {
qc->qc_type = QC_KERNEL;
qc->u.qc_kernel = __quota_kernel_cursor_create(qh);
if (qc->u.qc_kernel == NULL) {
serrno = errno;
free(qc);
errno = serrno;
return NULL;
}
}
return qc;
}

void
quotacursor_close(struct quotacursor *qc)
{
switch (qc->qc_type) {
case QC_OLDFILES:
__quota_oldfiles_cursor_destroy(qc->u.qc_oldfiles);
break;
case QC_KERNEL:
__quota_kernel_cursor_destroy(qc->qc_qh, qc->u.qc_kernel);
break;
}
free(qc);
}

int
quotacursor_skipidtype(struct quotacursor *qc, int idtype)
{
switch (qc->qc_type) {
case QC_OLDFILES:
return __quota_oldfiles_cursor_skipidtype(qc->u.qc_oldfiles,
idtype);
case QC_KERNEL:
return __quota_kernel_cursor_skipidtype(qc->qc_qh,
qc->u.qc_kernel,
idtype);
}
errno = EINVAL;
return -1;
}

int
quotacursor_get(struct quotacursor *qc,
struct quotakey *qk_ret, struct quotaval *qv_ret)
{
switch (qc->qc_type) {
case QC_OLDFILES:
return __quota_oldfiles_cursor_get(qc->qc_qh,
qc->u.qc_oldfiles,
qk_ret, qv_ret);
case QC_KERNEL:
return __quota_kernel_cursor_get(qc->qc_qh, qc->u.qc_kernel,
qk_ret, qv_ret);
}
errno = EINVAL;
return -1;
}

int
quotacursor_getn(struct quotacursor *qc,
struct quotakey *keys, struct quotaval *vals,
unsigned maxnum)
{
switch (qc->qc_type) {
case QC_OLDFILES:
return __quota_oldfiles_cursor_getn(qc->qc_qh,
qc->u.qc_oldfiles,
keys, vals, maxnum);
case QC_KERNEL:
return __quota_kernel_cursor_getn(qc->qc_qh, qc->u.qc_kernel,
keys, vals, maxnum);
}
errno = EINVAL;
return -1;
}

int
quotacursor_atend(struct quotacursor *qc)
{
switch (qc->qc_type) {
case QC_OLDFILES:
return __quota_oldfiles_cursor_atend(qc->u.qc_oldfiles);

case QC_KERNEL:
return __quota_kernel_cursor_atend(qc->qc_qh, qc->u.qc_kernel);
}
errno = EINVAL;
return -1;
}

int
quotacursor_rewind(struct quotacursor *qc)
{
switch (qc->qc_type) {
case QC_OLDFILES:
return __quota_oldfiles_cursor_rewind(qc->u.qc_oldfiles);
case QC_KERNEL:
return __quota_kernel_cursor_rewind(qc->qc_qh,qc->u.qc_kernel);
}
errno = EINVAL;
return -1;
}