/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Portions of this source code were derived from Berkeley 4.3 BSD
* under license from the Regents of the University of California.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/inttypes.h>
#include <sys/types.h>
#include <sys/t_lock.h>
#include <sys/param.h>
#include <sys/errno.h>
#include <sys/fstyp.h>
#include <sys/systm.h>
#include <sys/vfs.h>
#include <sys/statfs.h>
#include <sys/vnode.h>
#include <sys/file.h>
#include <sys/cmn_err.h>
#include <sys/debug.h>
#include <sys/pathname.h>
#include <vm/page.h>
#include <fs/fs_subr.h>
#if defined(_SYSCALL32_IMPL) || defined(_ILP32)
/*
* statfs(2) and fstatfs(2) have been replaced by statvfs(2) and
* fstatvfs(2) and will be removed from the system in a near-future
* release.
*
* Supported here purely for 32-bit compatibility.
*/
static int cstatfs(struct vfs *, struct statfs32 *, int);
int
statfs32(char *fname, struct statfs32 *sbp, int32_t len, int32_t fstyp)
{
vnode_t *vp;
int error;
int estale_retry = 0;
lookup:
if (error = lookupname(fname, UIO_USERSPACE, FOLLOW, NULLVPP, &vp)) {
if ((error == ESTALE) && fs_need_estale_retry(estale_retry++))
goto lookup;
return (set_errno(error));
}
if (fstyp != 0)
error = EINVAL;
else
error = cstatfs(vp->v_vfsp, sbp, len);
VN_RELE(vp);
if (error) {
if ((error == ESTALE) && fs_need_estale_retry(estale_retry++))
goto lookup;
return (set_errno(error));
}
return (0);
}
int
fstatfs32(int32_t fdes, struct statfs32 *sbp, int32_t len, int32_t fstyp)
{
struct file *fp;
int error;
if (fstyp != 0)
return (set_errno(EINVAL));
if ((fp = getf(fdes)) == NULL)
return (set_errno(EBADF));
error = cstatfs(fp->f_vnode->v_vfsp, sbp, len);
releasef(fdes);
if (error)
return (set_errno(error));
return (0);
}
/*
* Common routine for fstatfs and statfs.
*/
static int
cstatfs(struct vfs *vfsp, struct statfs32 *sbp, int len)
{
struct statfs32 sfs;
struct statvfs64 svfs;
int error, i;
char *cp, *cp2;
struct vfssw *vswp;
if (len < 0 || len > sizeof (struct statfs))
return (EINVAL);
if (error = VFS_STATVFS(vfsp, &svfs))
return (error);
if (svfs.f_blocks > UINT32_MAX || svfs.f_bfree > UINT32_MAX ||
svfs.f_files > UINT32_MAX || svfs.f_ffree > UINT32_MAX)
return (EOVERFLOW);
/*
* Map statvfs fields into the old statfs structure.
*/
bzero(&sfs, sizeof (sfs));
sfs.f_bsize = svfs.f_bsize;
sfs.f_frsize = (svfs.f_frsize == svfs.f_bsize) ? 0 : svfs.f_frsize;
sfs.f_blocks = svfs.f_blocks * (svfs.f_frsize / 512);
sfs.f_bfree = svfs.f_bfree * (svfs.f_frsize / 512);
sfs.f_files = svfs.f_files;
sfs.f_ffree = svfs.f_ffree;
cp = svfs.f_fstr;
cp2 = sfs.f_fname;
i = 0;
while (i++ < sizeof (sfs.f_fname))
if (*cp != '\0')
*cp2++ = *cp++;
else
*cp2++ = '\0';
while (*cp != '\0' &&
i++ < (sizeof (svfs.f_fstr) - sizeof (sfs.f_fpack)))
cp++;
(void) strncpy(sfs.f_fpack, cp + 1, sizeof (sfs.f_fpack));
if ((vswp = vfs_getvfssw(svfs.f_basetype)) == NULL)
sfs.f_fstyp = 0;
else {
sfs.f_fstyp = vswp - vfssw;
vfs_unrefvfssw(vswp);
}
if (copyout(&sfs, sbp, len))
return (EFAULT);
return (0);
}
#endif /* _SYSCALL32_IMPL || _ILP32 */