xref: /minix3/lib/libc/compat/sys/compat_statfs.c (revision 84d9c625bfea59e274550651111ae9edfdc40fbd)
1*84d9c625SLionel Sambuc /*	$NetBSD: compat_statfs.c,v 1.7 2013/10/04 21:07:37 christos Exp $	*/
22fe8fb19SBen Gras 
32fe8fb19SBen Gras /*-
42fe8fb19SBen Gras  * Copyright (c) 2004 The NetBSD Foundation, Inc.
52fe8fb19SBen Gras  * All rights reserved.
62fe8fb19SBen Gras  *
72fe8fb19SBen Gras  * This code is derived from software contributed to The NetBSD Foundation
82fe8fb19SBen Gras  * by Christos Zoulas.
92fe8fb19SBen Gras  *
102fe8fb19SBen Gras  * Redistribution and use in source and binary forms, with or without
112fe8fb19SBen Gras  * modification, are permitted provided that the following conditions
122fe8fb19SBen Gras  * are met:
132fe8fb19SBen Gras  * 1. Redistributions of source code must retain the above copyright
142fe8fb19SBen Gras  *    notice, this list of conditions and the following disclaimer.
152fe8fb19SBen Gras  * 2. Redistributions in binary form must reproduce the above copyright
162fe8fb19SBen Gras  *    notice, this list of conditions and the following disclaimer in the
172fe8fb19SBen Gras  *    documentation and/or other materials provided with the distribution.
182fe8fb19SBen Gras  *
192fe8fb19SBen Gras  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
202fe8fb19SBen Gras  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
212fe8fb19SBen Gras  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
222fe8fb19SBen Gras  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
232fe8fb19SBen Gras  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
242fe8fb19SBen Gras  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
252fe8fb19SBen Gras  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
262fe8fb19SBen Gras  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
272fe8fb19SBen Gras  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
282fe8fb19SBen Gras  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
292fe8fb19SBen Gras  * POSSIBILITY OF SUCH DAMAGE.
302fe8fb19SBen Gras  */
312fe8fb19SBen Gras 
322fe8fb19SBen Gras #include <sys/cdefs.h>
332fe8fb19SBen Gras #if defined(LIBC_SCCS) && !defined(lint)
34*84d9c625SLionel Sambuc __RCSID("$NetBSD: compat_statfs.c,v 1.7 2013/10/04 21:07:37 christos Exp $");
352fe8fb19SBen Gras #endif /* LIBC_SCCS and not lint */
362fe8fb19SBen Gras 
372fe8fb19SBen Gras #define __LIBC12_SOURCE__
382fe8fb19SBen Gras 
392fe8fb19SBen Gras #include "namespace.h"
402fe8fb19SBen Gras #include <sys/types.h>
412fe8fb19SBen Gras #include <sys/param.h>
422fe8fb19SBen Gras #include <sys/mount.h>
432fe8fb19SBen Gras #include <compat/sys/mount.h>
442fe8fb19SBen Gras #include <compat/include/fstypes.h>
452fe8fb19SBen Gras #include <string.h>
462fe8fb19SBen Gras #include <stdlib.h>
472fe8fb19SBen Gras 
482fe8fb19SBen Gras __warn_references(statfs,
492fe8fb19SBen Gras     "warning: reference to obsolete statfs(); use statvfs()")
502fe8fb19SBen Gras 
512fe8fb19SBen Gras __warn_references(fstatfs,
522fe8fb19SBen Gras     "warning: reference to obsolete fstatfs(); use fstatvfs()")
532fe8fb19SBen Gras 
542fe8fb19SBen Gras __warn_references(fhstatfs,
552fe8fb19SBen Gras     "warning: reference to obsolete fhstatfs(); use fhstatvfs()")
562fe8fb19SBen Gras 
572fe8fb19SBen Gras __warn_references(getfsstat,
582fe8fb19SBen Gras     "warning: reference to obsolete getfsstat(); use getvfsstat()")
592fe8fb19SBen Gras 
60*84d9c625SLionel Sambuc __strong_alias(statfs, __compat_statfs)
61*84d9c625SLionel Sambuc __strong_alias(fstatfs, __compat_fstatfs)
62*84d9c625SLionel Sambuc __strong_alias(fhstatfs, __compat_fhstatfs)
63*84d9c625SLionel Sambuc __strong_alias(getfsstat, __compat_getfsstat)
64*84d9c625SLionel Sambuc 
652fe8fb19SBen Gras /*
662fe8fb19SBen Gras  * Convert from a new statvfs to an old statfs structure.
672fe8fb19SBen Gras  */
682fe8fb19SBen Gras 
692fe8fb19SBen Gras static void vfs2fs(struct statfs12 *, const struct statvfs *);
702fe8fb19SBen Gras 
712fe8fb19SBen Gras #define MOUNTNO_NONE	0
722fe8fb19SBen Gras #define MOUNTNO_UFS	1		/* UNIX "Fast" Filesystem */
732fe8fb19SBen Gras #define MOUNTNO_NFS	2		/* Network Filesystem */
742fe8fb19SBen Gras #define MOUNTNO_MFS	3		/* Memory Filesystem */
752fe8fb19SBen Gras #define MOUNTNO_MSDOS	4		/* MSDOS Filesystem */
762fe8fb19SBen Gras #define MOUNTNO_CD9660	5		/* iso9660 cdrom */
772fe8fb19SBen Gras #define MOUNTNO_FDESC	6		/* /dev/fd filesystem */
782fe8fb19SBen Gras #define MOUNTNO_KERNFS	7		/* kernel variable filesystem */
792fe8fb19SBen Gras #define MOUNTNO_DEVFS	8		/* device node filesystem */
802fe8fb19SBen Gras #define MOUNTNO_AFS	9		/* AFS 3.x */
812fe8fb19SBen Gras static const struct {
822fe8fb19SBen Gras 	const char *name;
832fe8fb19SBen Gras 	const int value;
842fe8fb19SBen Gras } nv[] = {
852fe8fb19SBen Gras 	{ MOUNT_UFS, MOUNTNO_UFS },
862fe8fb19SBen Gras 	{ MOUNT_NFS, MOUNTNO_NFS },
872fe8fb19SBen Gras 	{ MOUNT_MFS, MOUNTNO_MFS },
882fe8fb19SBen Gras 	{ MOUNT_MSDOS, MOUNTNO_MSDOS },
892fe8fb19SBen Gras 	{ MOUNT_CD9660, MOUNTNO_CD9660 },
902fe8fb19SBen Gras 	{ MOUNT_FDESC, MOUNTNO_FDESC },
912fe8fb19SBen Gras 	{ MOUNT_KERNFS, MOUNTNO_KERNFS },
922fe8fb19SBen Gras 	{ MOUNT_AFS, MOUNTNO_AFS },
932fe8fb19SBen Gras };
942fe8fb19SBen Gras 
952fe8fb19SBen Gras static void
vfs2fs(struct statfs12 * bfs,const struct statvfs * fs)962fe8fb19SBen Gras vfs2fs(struct statfs12 *bfs, const struct statvfs *fs)
972fe8fb19SBen Gras {
982fe8fb19SBen Gras 	size_t i = 0;
992fe8fb19SBen Gras 	bfs->f_type = 0;
1002fe8fb19SBen Gras 	bfs->f_oflags = (short)fs->f_flag;
1012fe8fb19SBen Gras 
1022fe8fb19SBen Gras 	for (i = 0; i < sizeof(nv) / sizeof(nv[0]); i++) {
1032fe8fb19SBen Gras 		if (strcmp(nv[i].name, fs->f_fstypename) == 0) {
1042fe8fb19SBen Gras 			bfs->f_type = nv[i].value;
1052fe8fb19SBen Gras 			break;
1062fe8fb19SBen Gras 		}
1072fe8fb19SBen Gras 	}
1082fe8fb19SBen Gras #define CLAMP(a)	(long)(((a) & ~LONG_MAX) ? LONG_MAX : (a))
1092fe8fb19SBen Gras 	bfs->f_bsize = CLAMP(fs->f_frsize);
1102fe8fb19SBen Gras 	bfs->f_iosize = CLAMP(fs->f_iosize);
1112fe8fb19SBen Gras 	bfs->f_blocks = CLAMP(fs->f_blocks);
1122fe8fb19SBen Gras 	bfs->f_bfree = CLAMP(fs->f_bfree);
1132fe8fb19SBen Gras 	if (fs->f_bfree > fs->f_bresvd)
1142fe8fb19SBen Gras 		bfs->f_bavail = CLAMP(fs->f_bfree - fs->f_bresvd);
1152fe8fb19SBen Gras 	else
1162fe8fb19SBen Gras 		bfs->f_bavail = -CLAMP(fs->f_bresvd - fs->f_bfree);
1172fe8fb19SBen Gras 	bfs->f_files = CLAMP(fs->f_files);
1182fe8fb19SBen Gras 	bfs->f_ffree = CLAMP(fs->f_ffree);
1192fe8fb19SBen Gras 	bfs->f_fsid = fs->f_fsidx;
1202fe8fb19SBen Gras 	bfs->f_owner = fs->f_owner;
1212fe8fb19SBen Gras 	bfs->f_flags = (long)fs->f_flag;
1222fe8fb19SBen Gras 	bfs->f_syncwrites = CLAMP(fs->f_syncwrites);
1232fe8fb19SBen Gras 	bfs->f_asyncwrites = CLAMP(fs->f_asyncwrites);
1242fe8fb19SBen Gras 	(void)strncpy(bfs->f_fstypename, fs->f_fstypename,
1252fe8fb19SBen Gras 	    sizeof(bfs->f_fstypename));
1262fe8fb19SBen Gras 	(void)strncpy(bfs->f_mntonname, fs->f_mntonname,
1272fe8fb19SBen Gras 	    sizeof(bfs->f_mntonname));
1282fe8fb19SBen Gras 	(void)strncpy(bfs->f_mntfromname, fs->f_mntfromname,
1292fe8fb19SBen Gras 	    sizeof(bfs->f_mntfromname));
1302fe8fb19SBen Gras }
1312fe8fb19SBen Gras 
1322fe8fb19SBen Gras int
__compat_statfs(const char * file,struct statfs12 * ost)133*84d9c625SLionel Sambuc __compat_statfs(const char *file, struct statfs12 *ost)
1342fe8fb19SBen Gras {
1352fe8fb19SBen Gras 	struct statvfs nst;
1362fe8fb19SBen Gras 	int ret;
1372fe8fb19SBen Gras 
1382fe8fb19SBen Gras 	if ((ret = statvfs(file, &nst)) == -1)
1392fe8fb19SBen Gras 		return ret;
1402fe8fb19SBen Gras 	vfs2fs(ost, &nst);
1412fe8fb19SBen Gras 	return ret;
1422fe8fb19SBen Gras }
1432fe8fb19SBen Gras 
1442fe8fb19SBen Gras int
__compat_fstatfs(int f,struct statfs12 * ost)145*84d9c625SLionel Sambuc __compat_fstatfs(int f, struct statfs12 *ost)
1462fe8fb19SBen Gras {
1472fe8fb19SBen Gras 	struct statvfs nst;
1482fe8fb19SBen Gras 	int ret;
1492fe8fb19SBen Gras 
1502fe8fb19SBen Gras 	if ((ret = fstatvfs(f, &nst)) == -1)
1512fe8fb19SBen Gras 		return ret;
1522fe8fb19SBen Gras 	vfs2fs(ost, &nst);
1532fe8fb19SBen Gras 	return ret;
1542fe8fb19SBen Gras }
1552fe8fb19SBen Gras 
1562fe8fb19SBen Gras int __fhstatvfs140(const void *fhp, size_t fh_size, struct statvfs *buf,
1572fe8fb19SBen Gras     int flags);
1582fe8fb19SBen Gras 
1592fe8fb19SBen Gras int
__compat_fhstatfs(const struct compat_30_fhandle * fh,struct statfs12 * ost)160*84d9c625SLionel Sambuc __compat_fhstatfs(const struct compat_30_fhandle *fh, struct statfs12 *ost)
1612fe8fb19SBen Gras {
1622fe8fb19SBen Gras 	struct statvfs nst;
1632fe8fb19SBen Gras 	int ret;
1642fe8fb19SBen Gras 
1652fe8fb19SBen Gras 	if ((ret = __fhstatvfs140(fh, FHANDLE30_SIZE, &nst, ST_WAIT)) == -1)
1662fe8fb19SBen Gras 		return ret;
1672fe8fb19SBen Gras 	vfs2fs(ost, &nst);
1682fe8fb19SBen Gras 	return ret;
1692fe8fb19SBen Gras }
1702fe8fb19SBen Gras 
1712fe8fb19SBen Gras int
__compat_getfsstat(struct statfs12 * ost,long size,int flags)172*84d9c625SLionel Sambuc __compat_getfsstat(struct statfs12 *ost, long size, int flags)
1732fe8fb19SBen Gras {
1742fe8fb19SBen Gras 	struct statvfs *nst;
1752fe8fb19SBen Gras 	int ret, i;
1762fe8fb19SBen Gras 	size_t bsize = (size_t)(size / sizeof(*ost)) * sizeof(*nst);
1772fe8fb19SBen Gras 
1782fe8fb19SBen Gras 	if (ost != NULL) {
1792fe8fb19SBen Gras 		if ((nst = malloc(bsize)) == NULL)
1802fe8fb19SBen Gras 			return -1;
1812fe8fb19SBen Gras 	} else
1822fe8fb19SBen Gras 		nst = NULL;
1832fe8fb19SBen Gras 
1842fe8fb19SBen Gras 	if ((ret = getvfsstat(nst, bsize, flags)) == -1)
1852fe8fb19SBen Gras 		goto done;
1862fe8fb19SBen Gras 	if (nst)
1872fe8fb19SBen Gras 		for (i = 0; i < ret; i++)
1882fe8fb19SBen Gras 			vfs2fs(&ost[i], &nst[i]);
1892fe8fb19SBen Gras done:
1902fe8fb19SBen Gras 	if (nst)
1912fe8fb19SBen Gras 		free(nst);
1922fe8fb19SBen Gras 	return ret;
1932fe8fb19SBen Gras }
194