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File: [cvs.NetBSD.org] / src / lib / libquota / quota_cursor.c (download)

Revision 1.6, Wed Feb 1 05:46:46 2012 UTC (7 years, 9 months ago) by dholland
Branch: MAIN
CVS Tags: yamt-pagecache-base9, yamt-pagecache-base8, yamt-pagecache-base7, yamt-pagecache-base6, yamt-pagecache-base5, yamt-pagecache-base4, tls-maxphys-base, tls-maxphys, tls-earlyentropy-base, tls-earlyentropy, riastradh-xf86-video-intel-2-7-1-pre-2-21-15, riastradh-drm2-base3, riastradh-drm2-base2, riastradh-drm2-base1, riastradh-drm2-base, riastradh-drm2, prg-localcount2-base3, prg-localcount2-base2, prg-localcount2-base1, prg-localcount2-base, prg-localcount2, phil-wifi-base, phil-wifi-20190609, phil-wifi, pgoyette-localcount-base, pgoyette-localcount-20170426, pgoyette-localcount-20170320, pgoyette-localcount-20170107, pgoyette-localcount-20161104, pgoyette-localcount-20160806, pgoyette-localcount-20160726, pgoyette-localcount, pgoyette-compat-merge-20190127, pgoyette-compat-base, pgoyette-compat-20190127, pgoyette-compat-20190118, pgoyette-compat-1226, pgoyette-compat-1126, pgoyette-compat-1020, pgoyette-compat-0930, pgoyette-compat-0906, pgoyette-compat-0728, pgoyette-compat-0625, pgoyette-compat-0521, pgoyette-compat-0502, pgoyette-compat-0422, pgoyette-compat-0415, pgoyette-compat-0407, pgoyette-compat-0330, pgoyette-compat-0322, pgoyette-compat-0315, pgoyette-compat, perseant-stdc-iso10646-base, perseant-stdc-iso10646, netbsd-9-base, netbsd-9, netbsd-8-base, netbsd-8-1-RELEASE, netbsd-8-1-RC1, netbsd-8-0-RELEASE, netbsd-8-0-RC2, netbsd-8-0-RC1, netbsd-8, netbsd-7-nhusb-base-20170116, netbsd-7-nhusb-base, netbsd-7-nhusb, netbsd-7-base, netbsd-7-2-RELEASE, netbsd-7-1-RELEASE, netbsd-7-1-RC2, netbsd-7-1-RC1, netbsd-7-1-2-RELEASE, netbsd-7-1-1-RELEASE, netbsd-7-1, netbsd-7-0-RELEASE, netbsd-7-0-RC3, netbsd-7-0-RC2, netbsd-7-0-RC1, netbsd-7-0-2-RELEASE, netbsd-7-0-1-RELEASE, netbsd-7-0, netbsd-7, netbsd-6-base, netbsd-6-1-RELEASE, netbsd-6-1-RC4, netbsd-6-1-RC3, netbsd-6-1-RC2, netbsd-6-1-RC1, netbsd-6-1-5-RELEASE, netbsd-6-1-4-RELEASE, netbsd-6-1-3-RELEASE, netbsd-6-1-2-RELEASE, netbsd-6-1-1-RELEASE, netbsd-6-1, netbsd-6-0-RELEASE, netbsd-6-0-RC2, netbsd-6-0-RC1, netbsd-6-0-6-RELEASE, netbsd-6-0-5-RELEASE, netbsd-6-0-4-RELEASE, netbsd-6-0-3-RELEASE, netbsd-6-0-2-RELEASE, netbsd-6-0-1-RELEASE, netbsd-6-0, netbsd-6, matt-nb8-mediatek-base, matt-nb8-mediatek, matt-nb6-plus-nbase, matt-nb6-plus-base, matt-nb6-plus, localcount-20160914, bouyer-socketcan-base1, bouyer-socketcan-base, bouyer-socketcan, agc-symver-base, agc-symver, HEAD
Branch point for: yamt-pagecache
Changes since 1.5: +3 -3 lines

Be consistent about whether idtype and objtype codes are signed or
unsigned. They are signed. (While unsigned might have been a better
choice, it doesn't really matter and the majority of preexisting uses
were signed. And consistency is good.)

/*	$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;
}