minix/lib/libc/compat/sys/compat_statfs.c

194 lines
5.6 KiB
C
Raw Normal View History

/* $NetBSD: compat_statfs.c,v 1.7 2013/10/04 21:07:37 christos Exp $ */
/*-
* Copyright (c) 2004 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* 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>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: compat_statfs.c,v 1.7 2013/10/04 21:07:37 christos Exp $");
#endif /* LIBC_SCCS and not lint */
#define __LIBC12_SOURCE__
#include "namespace.h"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/mount.h>
#include <compat/sys/mount.h>
#include <compat/include/fstypes.h>
#include <string.h>
#include <stdlib.h>
__warn_references(statfs,
"warning: reference to obsolete statfs(); use statvfs()")
__warn_references(fstatfs,
"warning: reference to obsolete fstatfs(); use fstatvfs()")
__warn_references(fhstatfs,
"warning: reference to obsolete fhstatfs(); use fhstatvfs()")
__warn_references(getfsstat,
"warning: reference to obsolete getfsstat(); use getvfsstat()")
__strong_alias(statfs, __compat_statfs)
__strong_alias(fstatfs, __compat_fstatfs)
__strong_alias(fhstatfs, __compat_fhstatfs)
__strong_alias(getfsstat, __compat_getfsstat)
/*
* Convert from a new statvfs to an old statfs structure.
*/
static void vfs2fs(struct statfs12 *, const struct statvfs *);
#define MOUNTNO_NONE 0
#define MOUNTNO_UFS 1 /* UNIX "Fast" Filesystem */
#define MOUNTNO_NFS 2 /* Network Filesystem */
#define MOUNTNO_MFS 3 /* Memory Filesystem */
#define MOUNTNO_MSDOS 4 /* MSDOS Filesystem */
#define MOUNTNO_CD9660 5 /* iso9660 cdrom */
#define MOUNTNO_FDESC 6 /* /dev/fd filesystem */
#define MOUNTNO_KERNFS 7 /* kernel variable filesystem */
#define MOUNTNO_DEVFS 8 /* device node filesystem */
#define MOUNTNO_AFS 9 /* AFS 3.x */
static const struct {
const char *name;
const int value;
} nv[] = {
{ MOUNT_UFS, MOUNTNO_UFS },
{ MOUNT_NFS, MOUNTNO_NFS },
{ MOUNT_MFS, MOUNTNO_MFS },
{ MOUNT_MSDOS, MOUNTNO_MSDOS },
{ MOUNT_CD9660, MOUNTNO_CD9660 },
{ MOUNT_FDESC, MOUNTNO_FDESC },
{ MOUNT_KERNFS, MOUNTNO_KERNFS },
{ MOUNT_AFS, MOUNTNO_AFS },
};
static void
vfs2fs(struct statfs12 *bfs, const struct statvfs *fs)
{
size_t i = 0;
bfs->f_type = 0;
bfs->f_oflags = (short)fs->f_flag;
for (i = 0; i < sizeof(nv) / sizeof(nv[0]); i++) {
if (strcmp(nv[i].name, fs->f_fstypename) == 0) {
bfs->f_type = nv[i].value;
break;
}
}
#define CLAMP(a) (long)(((a) & ~LONG_MAX) ? LONG_MAX : (a))
bfs->f_bsize = CLAMP(fs->f_frsize);
bfs->f_iosize = CLAMP(fs->f_iosize);
bfs->f_blocks = CLAMP(fs->f_blocks);
bfs->f_bfree = CLAMP(fs->f_bfree);
if (fs->f_bfree > fs->f_bresvd)
bfs->f_bavail = CLAMP(fs->f_bfree - fs->f_bresvd);
else
bfs->f_bavail = -CLAMP(fs->f_bresvd - fs->f_bfree);
bfs->f_files = CLAMP(fs->f_files);
bfs->f_ffree = CLAMP(fs->f_ffree);
bfs->f_fsid = fs->f_fsidx;
bfs->f_owner = fs->f_owner;
bfs->f_flags = (long)fs->f_flag;
bfs->f_syncwrites = CLAMP(fs->f_syncwrites);
bfs->f_asyncwrites = CLAMP(fs->f_asyncwrites);
(void)strncpy(bfs->f_fstypename, fs->f_fstypename,
sizeof(bfs->f_fstypename));
(void)strncpy(bfs->f_mntonname, fs->f_mntonname,
sizeof(bfs->f_mntonname));
(void)strncpy(bfs->f_mntfromname, fs->f_mntfromname,
sizeof(bfs->f_mntfromname));
}
int
__compat_statfs(const char *file, struct statfs12 *ost)
{
struct statvfs nst;
int ret;
if ((ret = statvfs(file, &nst)) == -1)
return ret;
vfs2fs(ost, &nst);
return ret;
}
int
__compat_fstatfs(int f, struct statfs12 *ost)
{
struct statvfs nst;
int ret;
if ((ret = fstatvfs(f, &nst)) == -1)
return ret;
vfs2fs(ost, &nst);
return ret;
}
int __fhstatvfs140(const void *fhp, size_t fh_size, struct statvfs *buf,
int flags);
int
__compat_fhstatfs(const struct compat_30_fhandle *fh, struct statfs12 *ost)
{
struct statvfs nst;
int ret;
if ((ret = __fhstatvfs140(fh, FHANDLE30_SIZE, &nst, ST_WAIT)) == -1)
return ret;
vfs2fs(ost, &nst);
return ret;
}
int
__compat_getfsstat(struct statfs12 *ost, long size, int flags)
{
struct statvfs *nst;
int ret, i;
size_t bsize = (size_t)(size / sizeof(*ost)) * sizeof(*nst);
if (ost != NULL) {
if ((nst = malloc(bsize)) == NULL)
return -1;
} else
nst = NULL;
if ((ret = getvfsstat(nst, bsize, flags)) == -1)
goto done;
if (nst)
for (i = 0; i < ret; i++)
vfs2fs(&ost[i], &nst[i]);
done:
if (nst)
free(nst);
return ret;
}