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