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quota_cursor.c revision 1.3
      1  1.3  dholland /*	$NetBSD: quota_cursor.c,v 1.3 2012/01/09 15:41:58 dholland Exp $	*/
      2  1.1  dholland /*-
      3  1.1  dholland  * Copyright (c) 2011 The NetBSD Foundation, Inc.
      4  1.1  dholland  * All rights reserved.
      5  1.1  dholland  *
      6  1.1  dholland  * This code is derived from software contributed to The NetBSD Foundation
      7  1.1  dholland  * by David A. Holland.
      8  1.1  dholland  *
      9  1.1  dholland  * Redistribution and use in source and binary forms, with or without
     10  1.1  dholland  * modification, are permitted provided that the following conditions
     11  1.1  dholland  * are met:
     12  1.1  dholland  * 1. Redistributions of source code must retain the above copyright
     13  1.1  dholland  *    notice, this list of conditions and the following disclaimer.
     14  1.1  dholland  * 2. Redistributions in binary form must reproduce the above copyright
     15  1.1  dholland  *    notice, this list of conditions and the following disclaimer in the
     16  1.1  dholland  *    documentation and/or other materials provided with the distribution.
     17  1.1  dholland  *
     18  1.1  dholland  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     19  1.1  dholland  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     20  1.1  dholland  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     21  1.1  dholland  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     22  1.1  dholland  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     23  1.1  dholland  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     24  1.1  dholland  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     25  1.1  dholland  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     26  1.1  dholland  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     27  1.1  dholland  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     28  1.1  dholland  * POSSIBILITY OF SUCH DAMAGE.
     29  1.1  dholland  */
     30  1.1  dholland 
     31  1.1  dholland #include <sys/cdefs.h>
     32  1.3  dholland __RCSID("$NetBSD: quota_cursor.c,v 1.3 2012/01/09 15:41:58 dholland Exp $");
     33  1.1  dholland 
     34  1.1  dholland #include <stdlib.h>
     35  1.1  dholland #include <errno.h>
     36  1.1  dholland 
     37  1.1  dholland #include <quota.h>
     38  1.2  dholland #include "quotapvt.h"
     39  1.1  dholland 
     40  1.1  dholland struct quotacursor *
     41  1.1  dholland quota_opencursor(struct quotahandle *qh)
     42  1.1  dholland {
     43  1.2  dholland 	struct quotacursor *qc;
     44  1.3  dholland 	int8_t version;
     45  1.2  dholland 	int serrno;
     46  1.2  dholland 
     47  1.2  dholland 	if (qh->qh_isnfs) {
     48  1.2  dholland 		errno = EOPNOTSUPP;
     49  1.2  dholland 		return NULL;
     50  1.2  dholland 	}
     51  1.2  dholland 
     52  1.3  dholland 	if (__quota_proplib_getversion(qh, &version)) {
     53  1.3  dholland 		return NULL;
     54  1.3  dholland 	}
     55  1.3  dholland 
     56  1.3  dholland 	/*
     57  1.3  dholland 	 * For the time being at least the version 1 kernel code
     58  1.3  dholland 	 * cannot do cursors.
     59  1.3  dholland 	 */
     60  1.3  dholland 	if (version == 1 && !qh->qh_hasoldfiles) {
     61  1.3  dholland 		if (__quota_oldfiles_initialize(qh)) {
     62  1.3  dholland 			return NULL;
     63  1.3  dholland 		}
     64  1.3  dholland 	}
     65  1.3  dholland 
     66  1.2  dholland 	qc = malloc(sizeof(*qc));
     67  1.2  dholland 	if (qc == NULL) {
     68  1.2  dholland 		return NULL;
     69  1.2  dholland 	}
     70  1.2  dholland 
     71  1.2  dholland 	qc->qc_qh = qh;
     72  1.2  dholland 
     73  1.3  dholland 	if (version == 1) {
     74  1.3  dholland 		qc->qc_type = QC_OLDFILES;
     75  1.3  dholland 		qc->u.qc_oldfiles = __quota_oldfiles_cursor_create(qh);
     76  1.3  dholland 		if (qc->u.qc_oldfiles == NULL) {
     77  1.3  dholland 			serrno = errno;
     78  1.3  dholland 			free(qc);
     79  1.3  dholland 			errno = serrno;
     80  1.3  dholland 			return NULL;
     81  1.3  dholland 		}
     82  1.3  dholland 	} else {
     83  1.3  dholland 		qc->qc_type = QC_PROPLIB;
     84  1.3  dholland 		qc->u.qc_proplib = __quota_proplib_cursor_create();
     85  1.3  dholland 		if (qc->u.qc_proplib == NULL) {
     86  1.3  dholland 			serrno = errno;
     87  1.3  dholland 			free(qc);
     88  1.3  dholland 			errno = serrno;
     89  1.3  dholland 			return NULL;
     90  1.3  dholland 		}
     91  1.2  dholland 	}
     92  1.2  dholland 	return qc;
     93  1.1  dholland }
     94  1.1  dholland 
     95  1.1  dholland void
     96  1.1  dholland quotacursor_close(struct quotacursor *qc)
     97  1.1  dholland {
     98  1.3  dholland 	switch (qc->qc_type) {
     99  1.3  dholland 	    case QC_PROPLIB:
    100  1.3  dholland 		__quota_proplib_cursor_destroy(qc->u.qc_proplib);
    101  1.3  dholland 		break;
    102  1.3  dholland 	    case QC_OLDFILES:
    103  1.3  dholland 		__quota_oldfiles_cursor_destroy(qc->u.qc_oldfiles);
    104  1.3  dholland 		break;
    105  1.3  dholland 	}
    106  1.2  dholland 	free(qc);
    107  1.1  dholland }
    108  1.1  dholland 
    109  1.1  dholland int
    110  1.1  dholland quotacursor_skipidtype(struct quotacursor *qc, unsigned idtype)
    111  1.1  dholland {
    112  1.3  dholland 	switch (qc->qc_type) {
    113  1.3  dholland 	    case QC_PROPLIB:
    114  1.3  dholland 		return __quota_proplib_cursor_skipidtype(qc->u.qc_proplib,
    115  1.3  dholland 							 idtype);
    116  1.3  dholland 	    case QC_OLDFILES:
    117  1.3  dholland 		return __quota_oldfiles_cursor_skipidtype(qc->u.qc_oldfiles,
    118  1.3  dholland 							  idtype);
    119  1.3  dholland 	}
    120  1.3  dholland 	errno = EINVAL;
    121  1.3  dholland 	return -1;
    122  1.1  dholland }
    123  1.1  dholland 
    124  1.1  dholland int
    125  1.1  dholland quotacursor_get(struct quotacursor *qc,
    126  1.1  dholland 		struct quotakey *qk_ret, struct quotaval *qv_ret)
    127  1.1  dholland {
    128  1.3  dholland 	switch (qc->qc_type) {
    129  1.3  dholland 	    case QC_PROPLIB:
    130  1.3  dholland 		return __quota_proplib_cursor_get(qc->qc_qh, qc->u.qc_proplib,
    131  1.3  dholland 						  qk_ret, qv_ret);
    132  1.3  dholland 	    case QC_OLDFILES:
    133  1.3  dholland 		return __quota_oldfiles_cursor_get(qc->qc_qh,
    134  1.3  dholland 						   qc->u.qc_oldfiles,
    135  1.3  dholland 						   qk_ret, qv_ret);
    136  1.3  dholland 	}
    137  1.3  dholland 	errno = EINVAL;
    138  1.3  dholland 	return -1;
    139  1.1  dholland }
    140  1.1  dholland 
    141  1.1  dholland int
    142  1.1  dholland quotacursor_getn(struct quotacursor *qc,
    143  1.1  dholland 		 struct quotakey *keys, struct quotaval *vals,
    144  1.1  dholland 		 unsigned maxnum)
    145  1.1  dholland {
    146  1.3  dholland 	switch (qc->qc_type) {
    147  1.3  dholland 	    case QC_PROPLIB:
    148  1.3  dholland 		return __quota_proplib_cursor_getn(qc->qc_qh, qc->u.qc_proplib,
    149  1.3  dholland 						   keys, vals, maxnum);
    150  1.3  dholland 	    case QC_OLDFILES:
    151  1.3  dholland 		return __quota_oldfiles_cursor_getn(qc->qc_qh,
    152  1.3  dholland 						    qc->u.qc_oldfiles,
    153  1.3  dholland 						    keys, vals, maxnum);
    154  1.3  dholland 	}
    155  1.3  dholland 	errno = EINVAL;
    156  1.3  dholland 	return -1;
    157  1.1  dholland }
    158  1.1  dholland 
    159  1.1  dholland int
    160  1.1  dholland quotacursor_atend(struct quotacursor *qc)
    161  1.1  dholland {
    162  1.3  dholland 	switch (qc->qc_type) {
    163  1.3  dholland 	    case QC_PROPLIB:
    164  1.3  dholland 		return __quota_proplib_cursor_atend(qc->qc_qh,
    165  1.3  dholland 						    qc->u.qc_proplib);
    166  1.3  dholland 	    case QC_OLDFILES:
    167  1.3  dholland 		return __quota_oldfiles_cursor_atend(qc->u.qc_oldfiles);
    168  1.3  dholland 	}
    169  1.3  dholland 	errno = EINVAL;
    170  1.3  dholland 	return -1;
    171  1.1  dholland }
    172  1.1  dholland 
    173  1.1  dholland int
    174  1.1  dholland quotacursor_rewind(struct quotacursor *qc)
    175  1.1  dholland {
    176  1.3  dholland 	switch (qc->qc_type) {
    177  1.3  dholland 	    case QC_PROPLIB:
    178  1.3  dholland 		return __quota_proplib_cursor_rewind(qc->u.qc_proplib);
    179  1.3  dholland 	    case QC_OLDFILES:
    180  1.3  dholland 		return __quota_oldfiles_cursor_rewind(qc->u.qc_oldfiles);
    181  1.3  dholland 	}
    182  1.3  dholland 	errno = EINVAL;
    183  1.3  dholland 	return -1;
    184  1.1  dholland }
    185