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/* $OpenBSD: vfs_syscalls_25.c,v 1.7 2005/11/30 10:35:07 pedro Exp $ */
/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)vfs_syscalls.c 8.28 (Berkeley) 12/10/94
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/filedesc.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/uio.h>
#include <sys/dirent.h>
#include <sys/syscallargs.h>
void statfs_to_ostatfs(struct proc *, struct mount *, struct statfs *, struct ostatfs *);
/*
* Convert struct statfs -> struct ostatfs
*/
void
statfs_to_ostatfs(p, mp, sp, osp)
struct proc *p;
struct mount *mp;
struct statfs *sp;
struct ostatfs *osp;
{
#ifdef COMPAT_43
osp->f_type = mp->mnt_vfc->vfc_typenum;
#else
osp->f_type = 0;
#endif
osp->f_flags = mp->mnt_flag & 0xffff;
osp->f_bsize = sp->f_bsize;
osp->f_iosize = sp->f_iosize;
osp->f_blocks = sp->f_blocks;
osp->f_bfree = sp->f_bfree;
osp->f_bavail = sp->f_bavail;
osp->f_files = sp->f_files;
osp->f_ffree = sp->f_ffree;
/* Don't let non-root see filesystem id (for NFS security) */
if (suser(p, 0))
osp->f_fsid.val[0] = osp->f_fsid.val[1] = 0;
else
bcopy(&sp->f_fsid, &osp->f_fsid, sizeof(osp->f_fsid));
osp->f_owner = sp->f_owner;
osp->f_syncwrites = sp->f_syncwrites;
osp->f_asyncwrites = sp->f_asyncwrites;
bcopy(sp->f_fstypename, osp->f_fstypename, MFSNAMELEN);
bcopy(sp->f_mntonname, osp->f_mntonname, MNAMELEN);
bcopy(sp->f_mntfromname, osp->f_mntfromname, MNAMELEN);
}
/*
* Get filesystem statistics.
*/
/* ARGSUSED */
int
compat_25_sys_statfs(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct compat_25_sys_statfs_args /* {
syscallarg(char *) path;
syscallarg(struct ostatfs *) buf;
} */ *uap = v;
register struct mount *mp;
register struct statfs *sp;
struct ostatfs osb;
int error;
struct nameidata nd;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return (error);
mp = nd.ni_vp->v_mount;
sp = &mp->mnt_stat;
vrele(nd.ni_vp);
if ((error = VFS_STATFS(mp, sp, p)) != 0)
return (error);
statfs_to_ostatfs(p, mp, sp, &osb);
return (copyout((caddr_t)&osb, (caddr_t)SCARG(uap, buf), sizeof(osb)));
}
/*
* Get filesystem statistics.
*/
/* ARGSUSED */
int
compat_25_sys_fstatfs(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct compat_25_sys_fstatfs_args /* {
syscallarg(int) fd;
syscallarg(struct ostatfs *) buf;
} */ *uap = v;
struct file *fp;
struct mount *mp;
struct statfs *sp;
struct ostatfs osb;
int error;
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
return (error);
mp = ((struct vnode *)fp->f_data)->v_mount;
sp = &mp->mnt_stat;
error = VFS_STATFS(mp, sp, p);
FRELE(fp);
if (error)
return (error);
statfs_to_ostatfs(p, mp, sp, &osb);
return (copyout((caddr_t)&osb, (caddr_t)SCARG(uap, buf), sizeof(osb)));
}
/*
* Get statistics on all filesystems.
*/
int
compat_25_sys_getfsstat(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct compat_25_sys_getfsstat_args /* {
syscallarg(struct ostatfs *) buf;
syscallarg(long) bufsize;
syscallarg(int) flags;
} */ *uap = v;
register struct mount *mp, *nmp;
register struct statfs *sp;
struct ostatfs osb;
caddr_t sfsp;
long count, maxcount;
int error, flags = SCARG(uap, flags);
maxcount = SCARG(uap, bufsize) / sizeof(struct ostatfs);
sfsp = (caddr_t)SCARG(uap, buf);
count = 0;
simple_lock(&mountlist_slock);
for (mp = CIRCLEQ_FIRST(&mountlist); mp != CIRCLEQ_END(&mountlist);
mp = nmp) {
if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) {
nmp = CIRCLEQ_NEXT(mp, mnt_list);
continue;
}
if (sfsp && count < maxcount) {
sp = &mp->mnt_stat;
/* Refresh stats unless MNT_NOWAIT is specified */
if (flags != MNT_NOWAIT &&
flags != MNT_LAZY &&
(flags == MNT_WAIT ||
flags == 0) &&
(error = VFS_STATFS(mp, sp, p))) {
simple_lock(&mountlist_slock);
nmp = mp->mnt_list.cqe_next;
vfs_unbusy(mp);
continue;
}
statfs_to_ostatfs(p, mp, sp, &osb);
error = copyout((caddr_t)&osb, sfsp, sizeof(osb));
if (error) {
vfs_unbusy(mp);
return (error);
}
sfsp += sizeof(osb);
}
count++;
simple_lock(&mountlist_slock);
nmp = CIRCLEQ_NEXT(mp, mnt_list);
vfs_unbusy(mp);
}
simple_unlock(&mountlist_slock);
if (sfsp && count > maxcount)
*retval = maxcount;
else
*retval = count;
return (0);
}
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