212 lines
5.9 KiB
C
212 lines
5.9 KiB
C
/* $NetBSD: vfs_syscalls_20.c,v 1.46 2020/06/28 14:37:53 christos Exp $ */
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/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)vfs_syscalls.c 8.42 (Berkeley) 7/31/95
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: vfs_syscalls_20.c,v 1.46 2020/06/28 14:37:53 christos Exp $");
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#ifdef _KERNEL_OPT
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#include "opt_compat_netbsd.h"
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/filedesc.h>
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#include <sys/kernel.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/uio.h>
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#include <sys/dirent.h>
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#include <sys/sysctl.h>
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#include <sys/syscall.h>
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#include <sys/syscallvar.h>
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#include <sys/syscallargs.h>
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#include <sys/kauth.h>
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#include <sys/vfs_syscalls.h>
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#include <compat/common/compat_mod.h>
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#include <compat/sys/mount.h>
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#include <compat/sys/statvfs.h>
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static const struct syscall_package vfs_syscalls_20_syscalls[] = {
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{ SYS_compat_20_fhstatfs, 0, (sy_call_t *)compat_20_sys_fhstatfs },
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{ SYS_compat_20_fstatfs, 0, (sy_call_t *)compat_20_sys_fstatfs },
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{ SYS_compat_20_getfsstat, 0, (sy_call_t *)compat_20_sys_getfsstat },
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{ SYS_compat_20_statfs, 0, (sy_call_t *)compat_20_sys_statfs },
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{ 0, 0, NULL }
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};
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/*
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* Get filesystem statistics.
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*/
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/* ARGSUSED */
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int
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compat_20_sys_statfs(struct lwp *l, const struct compat_20_sys_statfs_args *uap, register_t *retval)
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{
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/* {
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syscallarg(const char *) path;
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syscallarg(struct statfs12 *) buf;
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} */
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struct mount *mp;
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struct statvfs *sbuf;
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int error;
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struct vnode *vp;
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error = namei_simple_user(SCARG(uap, path),
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NSM_FOLLOW_TRYEMULROOT, &vp);
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if (error != 0)
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return error;
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mp = vp->v_mount;
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sbuf = STATVFSBUF_GET();
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if ((error = dostatvfs(mp, sbuf, l, 0, 1)) != 0)
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goto done;
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error = statvfs_to_statfs12_copy(sbuf, SCARG(uap, buf), 0);
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done:
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vrele(vp);
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STATVFSBUF_PUT(sbuf);
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return error;
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}
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/*
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* Get filesystem statistics.
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*/
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/* ARGSUSED */
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int
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compat_20_sys_fstatfs(struct lwp *l, const struct compat_20_sys_fstatfs_args *uap, register_t *retval)
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{
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/* {
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syscallarg(int) fd;
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syscallarg(struct statfs12 *) buf;
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} */
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struct file *fp;
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struct mount *mp;
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struct statvfs *sbuf;
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int error;
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/* fd_getvnode() will use the descriptor for us */
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if ((error = fd_getvnode(SCARG(uap, fd), &fp)) != 0)
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return (error);
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mp = fp->f_vnode->v_mount;
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sbuf = STATVFSBUF_GET();
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if ((error = dostatvfs(mp, sbuf, l, 0, 1)) != 0)
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goto out;
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error = statvfs_to_statfs12_copy(sbuf, SCARG(uap, buf), 0);
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out:
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fd_putfile(SCARG(uap, fd));
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STATVFSBUF_PUT(sbuf);
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return error;
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}
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/*
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* Get statistics on all filesystems.
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*/
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int
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compat_20_sys_getfsstat(struct lwp *l, const struct compat_20_sys_getfsstat_args *uap, register_t *retval)
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{
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/* {
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syscallarg(struct statfs12 *) buf;
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syscallarg(long) bufsize;
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syscallarg(int) flags;
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} */
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return do_sys_getvfsstat(l, SCARG(uap, buf), SCARG(uap, bufsize),
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SCARG(uap, flags), statvfs_to_statfs12_copy,
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sizeof(struct statfs12), retval);
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}
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int
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compat_20_sys_fhstatfs(struct lwp *l, const struct compat_20_sys_fhstatfs_args *uap, register_t *retval)
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{
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/* {
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syscallarg(const struct compat_30_fhandle *) fhp;
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syscallarg(struct statfs12 *) buf;
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} */
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struct statvfs *sbuf;
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struct compat_30_fhandle fh;
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struct mount *mp;
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struct vnode *vp;
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int error;
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/*
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* Must be super user
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*/
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if ((error = kauth_authorize_system(l->l_cred,
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KAUTH_SYSTEM_FILEHANDLE, 0, NULL, NULL, NULL)))
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return (error);
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if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fh))) != 0)
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return (error);
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if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL)
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return (ESTALE);
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error = VFS_FHTOVP(mp, (struct fid*)&fh.fh_fid, LK_EXCLUSIVE, &vp);
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if (error != 0)
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return (error);
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mp = vp->v_mount;
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VOP_UNLOCK(vp);
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sbuf = STATVFSBUF_GET();
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if ((error = VFS_STATVFS(mp, sbuf)) != 0)
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goto out;
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error = statvfs_to_statfs12_copy(sbuf, SCARG(uap, buf), 0);
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out:
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vrele(vp);
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STATVFSBUF_PUT(sbuf);
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return error;
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}
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int
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vfs_syscalls_20_init(void)
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{
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return syscall_establish(NULL, vfs_syscalls_20_syscalls);
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}
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int
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vfs_syscalls_20_fini(void)
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{
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return syscall_disestablish(NULL, vfs_syscalls_20_syscalls);
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}
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