[unix-history] / sys / kern / vfs_vnops.c

/*
 * Copyright (c) 1982, 1986, 1989 Regents of the University of California.
 * All rights reserved.
 *
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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.
 *
 *	from: @(#)vfs_vnops.c	7.33 (Berkeley) 6/27/91
 *	$Id: vfs_vnops.c,v 1.3 1993/11/25 01:33:45 wollman Exp $
 */

#include "param.h"
#include "systm.h"
#include "kernel.h"
#include "file.h"
#include "stat.h"
#include "buf.h"
#include "proc.h"
#include "mount.h"
#include "namei.h"
#include "vnode.h"
#include "ioctl.h"
#include "tty.h"

struct 	fileops vnops =
	{ vn_read, vn_write, vn_ioctl, vn_select, vn_closefile };

/*
 * Common code for vnode open operations.
 * Check permissions, and call the VOP_OPEN or VOP_CREATE routine.
 */
int
vn_open(ndp, p, fmode, cmode)
	register struct nameidata *ndp;
	struct proc *p;
	int fmode, cmode;
{
	register struct vnode *vp;
	register struct ucred *cred = p->p_ucred;
	struct vattr vat;
	struct vattr *vap = &vat;
	int error;

	if (fmode & O_CREAT) {
		ndp->ni_nameiop = CREATE | LOCKPARENT | LOCKLEAF;
		if ((fmode & O_EXCL) == 0)
			ndp->ni_nameiop |= FOLLOW;
		if (error = namei(ndp, p))
			return (error);
		if (ndp->ni_vp == NULL) {
			VATTR_NULL(vap);
			vap->va_type = VREG;
			vap->va_mode = cmode;
			if (error = VOP_CREATE(ndp, vap, p))
				return (error);
			fmode &= ~O_TRUNC;
			vp = ndp->ni_vp;
		} else {
			VOP_ABORTOP(ndp);
			if (ndp->ni_dvp == ndp->ni_vp)
				vrele(ndp->ni_dvp);
			else
				vput(ndp->ni_dvp);
			ndp->ni_dvp = NULL;
			vp = ndp->ni_vp;
			if (fmode & O_EXCL) {
				error = EEXIST;
				goto bad;
			}
			fmode &= ~O_CREAT;
		}
	} else {
		ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF;
		if (error = namei(ndp, p))
			return (error);
		vp = ndp->ni_vp;
	}
	if (vp->v_type == VSOCK) {
		error = EOPNOTSUPP;
		goto bad;
	}
	if ((fmode & O_CREAT) == 0) {
		if (fmode & FREAD) {
			if (error = VOP_ACCESS(vp, VREAD, cred, p))
				goto bad;
		}
		if (fmode & (FWRITE | O_TRUNC)) {
			if (vp->v_type == VDIR) {
				error = EISDIR;
				goto bad;
			}
			if ((error = vn_writechk(vp)) ||
			    (error = VOP_ACCESS(vp, VWRITE, cred, p)))
				goto bad;
		}
	}
	if (fmode & O_TRUNC) {
		VATTR_NULL(vap);
		vap->va_size = 0;
		if (error = VOP_SETATTR(vp, vap, cred, p))
			goto bad;
	}
	if (error = VOP_OPEN(vp, fmode, cred, p))
		goto bad;
	if (fmode & FWRITE)
		vp->v_writecount++;
	return (0);
bad:
	vput(vp);
	return (error);
}

/*
 * Check for write permissions on the specified vnode.
 * The read-only status of the file system is checked.
 * Also, prototype text segments cannot be written.
 */
int
vn_writechk(vp)
	register struct vnode *vp;
{

	/*
	 * Disallow write attempts on read-only file systems;
	 * unless the file is a socket or a block or character
	 * device resident on the file system.
	 */
	if (vp->v_mount->mnt_flag & MNT_RDONLY) {
		switch (vp->v_type) {
		case VREG: case VDIR: case VLNK:
			return (EROFS);
		}
	}
	/*
	 * If there's shared text associated with
	 * the vnode, try to free it up once.  If
	 * we fail, we can't allow writing.
	 */
	if ((vp->v_flag & VTEXT) && !vnode_pager_uncache(vp))
		return (ETXTBSY);
	return (0);
}

/*
 * Vnode close call
 */
int
vn_close(vp, flags, cred, p)
	register struct vnode *vp;
	int flags;
	struct ucred *cred;
	struct proc *p;
{
	int error;

	if (flags & FWRITE)
		vp->v_writecount--;
	error = VOP_CLOSE(vp, flags, cred, p);
	vrele(vp);
	return (error);
}

/*
 * Package up an I/O request on a vnode into a uio and do it.
 * [internal interface to file i/o for kernel only]
 */
int
vn_rdwr(rw, vp, base, len, offset, segflg, ioflg, cred, aresid, p)
	enum uio_rw rw;
	struct vnode *vp;
	caddr_t base;
	int len;
	off_t offset;
	enum uio_seg segflg;
	int ioflg;
	struct ucred *cred;
	int *aresid;
	struct proc *p;
{
	struct uio auio;
	struct iovec aiov;
	int error;

	if ((ioflg & IO_NODELOCKED) == 0)
		VOP_LOCK(vp);
	auio.uio_iov = &aiov;
	auio.uio_iovcnt = 1;
	aiov.iov_base = base;
	aiov.iov_len = len;
	auio.uio_resid = len;
	auio.uio_offset = offset;
	auio.uio_segflg = segflg;
	auio.uio_rw = rw;
	auio.uio_procp = p;
	if (rw == UIO_READ)
		error = VOP_READ(vp, &auio, ioflg, cred);
	else
		error = VOP_WRITE(vp, &auio, ioflg, cred);
	if (aresid)
		*aresid = auio.uio_resid;
	else
		if (auio.uio_resid && error == 0)
			error = EIO;
	if ((ioflg & IO_NODELOCKED) == 0)
		VOP_UNLOCK(vp);
	return (error);
}

/*
 * File table vnode read routine.
 */
int
vn_read(fp, uio, cred)
	struct file *fp;
	struct uio *uio;
	struct ucred *cred;
{
	register struct vnode *vp = (struct vnode *)fp->f_data;
	int count, error;

	VOP_LOCK(vp);
	uio->uio_offset = fp->f_offset;
	count = uio->uio_resid;
	error = VOP_READ(vp, uio, (fp->f_flag & FNONBLOCK) ? IO_NDELAY : 0,
		cred);
	fp->f_offset += count - uio->uio_resid;
	VOP_UNLOCK(vp);
	return (error);
}

/*
 * File table vnode write routine.
 */
int
vn_write(fp, uio, cred)
	struct file *fp;
	struct uio *uio;
	struct ucred *cred;
{
	register struct vnode *vp = (struct vnode *)fp->f_data;
	int count, error, ioflag = 0;

	if (vp->v_type == VREG && (fp->f_flag & O_APPEND))
		ioflag |= IO_APPEND;
	if (fp->f_flag & FNONBLOCK)
		ioflag |= IO_NDELAY;
	VOP_LOCK(vp);
	uio->uio_offset = fp->f_offset;
	count = uio->uio_resid;
	error = VOP_WRITE(vp, uio, ioflag, cred);
	if (ioflag & IO_APPEND)
		fp->f_offset = uio->uio_offset;
	else
		fp->f_offset += count - uio->uio_resid;
	VOP_UNLOCK(vp);
	return (error);
}

/*
 * File table vnode stat routine.
 */
int
vn_stat(vp, sb, p)
	struct vnode *vp;
	register struct stat *sb;
	struct proc *p;
{
	struct vattr vattr;
	register struct vattr *vap;
	int error;
	u_short mode;

	vap = &vattr;
	error = VOP_GETATTR(vp, vap, p->p_ucred, p);
	if (error)
		return (error);
	/*
	 * Copy from vattr table
	 */
	sb->st_dev = vap->va_fsid;
	sb->st_ino = vap->va_fileid;
	mode = vap->va_mode;
	switch (vp->v_type) {
	case VREG:
	case VPROC:
		mode |= S_IFREG;
		break;
	case VDIR:
		mode |= S_IFDIR;
		break;
	case VBLK:
		mode |= S_IFBLK;
		break;
	case VCHR:
		mode |= S_IFCHR;
		break;
	case VLNK:
		mode |= S_IFLNK;
		break;
	case VSOCK:
		mode |= S_IFSOCK;
		break;
	case VFIFO:
		mode |= S_IFIFO;
		break;
	default:
		return (EBADF);
	};
	sb->st_mode = mode;
	sb->st_nlink = vap->va_nlink;
	sb->st_uid = vap->va_uid;
	sb->st_gid = vap->va_gid;
	sb->st_rdev = vap->va_rdev;
	sb->st_size = vap->va_size;
	sb->st_atime = vap->va_atime.tv_sec;
	sb->st_spare1 = 0;
	sb->st_mtime = vap->va_mtime.tv_sec;
	sb->st_spare2 = 0;
	sb->st_ctime = vap->va_ctime.tv_sec;
	sb->st_spare3 = 0;
	sb->st_blksize = vap->va_blocksize;
	sb->st_flags = vap->va_flags;
	sb->st_gen = vap->va_gen;
	sb->st_blocks = vap->va_bytes / S_BLKSIZE;
	return (0);
}

/*
 * File table vnode ioctl routine.
 */
int
vn_ioctl(fp, com, data, p)
	struct file *fp;
	int com;
	caddr_t data;
	struct proc *p;
{
	register struct vnode *vp = ((struct vnode *)fp->f_data);
	struct vattr vattr;
	int error;

	switch (vp->v_type) {

	case VREG:
	case VDIR:
		if (com == FIONREAD) {
			if (error = VOP_GETATTR(vp, &vattr, p->p_ucred, p))
				return (error);
			*(off_t *)data = vattr.va_size - fp->f_offset;
			return (0);
		}
		if (com == FIONBIO || com == FIOASYNC)	/* XXX */
			return (0);			/* XXX */
		/* fall into ... */

	default:
		return (ENOTTY);

	case VFIFO:
	case VCHR:
	case VBLK:
		error = VOP_IOCTL(vp, com, data, fp->f_flag, p->p_ucred, p);
		if (error == 0 && com == TIOCSCTTY) {
			p->p_session->s_ttyvp = vp;
			VREF(vp);
		}
		return (error);
	}
}

/*
 * File table vnode select routine.
 */
int
vn_select(fp, which, p)
	struct file *fp;
	int which;
	struct proc *p;
{

	return (VOP_SELECT(((struct vnode *)fp->f_data), which, fp->f_flag,
		fp->f_cred, p));
}

/*
 * File table vnode close routine.
 */
int
vn_closefile(fp, p)
	struct file *fp;
	struct proc *p;
{

	return (vn_close(((struct vnode *)fp->f_data), fp->f_flag,
		fp->f_cred, p));
}

/*
 * vn_fhtovp() - convert a fh to a vnode ptr (optionally locked)
 * 	- look up fsid in mount list (if not found ret error)
 *	- get vp by calling VFS_FHTOVP() macro
 *	- if lockflag lock it with VOP_LOCK()
 */
int
vn_fhtovp(fhp, lockflag, vpp)
	fhandle_t *fhp;
	int lockflag;
	struct vnode **vpp;
{
	register struct mount *mp;

	if ((mp = getvfs(&fhp->fh_fsid)) == NULL)
		return (ESTALE);
	if (VFS_FHTOVP(mp, &fhp->fh_fid, vpp))
		return (ESTALE);
	if (!lockflag)
		VOP_UNLOCK(*vpp);
	return (0);
}
Commit	Line	Data
15637ed4 RG	1	/*
	2	* Copyright (c) 1982, 1986, 1989 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*
600f7f07	33	* from: @(#)vfs_vnops.c 7.33 (Berkeley) 6/27/91
317350b1	34	* $Id: vfs_vnops.c,v 1.3 1993/11/25 01:33:45 wollman Exp $
15637ed4 RG	35	*/
	36
	37	#include "param.h"
	38	#include "systm.h"
	39	#include "kernel.h"
	40	#include "file.h"
	41	#include "stat.h"
	42	#include "buf.h"
	43	#include "proc.h"
	44	#include "mount.h"
	45	#include "namei.h"
	46	#include "vnode.h"
	47	#include "ioctl.h"
	48	#include "tty.h"
	49
	50	struct fileops vnops =
	51	{ vn_read, vn_write, vn_ioctl, vn_select, vn_closefile };
	52
	53	/*
	54	* Common code for vnode open operations.
	55	* Check permissions, and call the VOP_OPEN or VOP_CREATE routine.
	56	*/
4c45483e	57	int
15637ed4 RG	58	vn_open(ndp, p, fmode, cmode)
	59	register struct nameidata *ndp;
	60	struct proc *p;
	61	int fmode, cmode;
	62	{
	63	register struct vnode *vp;
	64	register struct ucred *cred = p->p_ucred;
	65	struct vattr vat;
	66	struct vattr *vap = &vat;
	67	int error;
	68
	69	if (fmode & O_CREAT) {
	70	ndp->ni_nameiop = CREATE \| LOCKPARENT \| LOCKLEAF;
	71	if ((fmode & O_EXCL) == 0)
	72	ndp->ni_nameiop \|= FOLLOW;
	73	if (error = namei(ndp, p))
	74	return (error);
	75	if (ndp->ni_vp == NULL) {
	76	VATTR_NULL(vap);
	77	vap->va_type = VREG;
	78	vap->va_mode = cmode;
	79	if (error = VOP_CREATE(ndp, vap, p))
	80	return (error);
	81	fmode &= ~O_TRUNC;
	82	vp = ndp->ni_vp;
	83	} else {
	84	VOP_ABORTOP(ndp);
	85	if (ndp->ni_dvp == ndp->ni_vp)
	86	vrele(ndp->ni_dvp);
	87	else
	88	vput(ndp->ni_dvp);
	89	ndp->ni_dvp = NULL;
	90	vp = ndp->ni_vp;
	91	if (fmode & O_EXCL) {
	92	error = EEXIST;
	93	goto bad;
	94	}
	95	fmode &= ~O_CREAT;
	96	}
	97	} else {
	98	ndp->ni_nameiop = LOOKUP \| FOLLOW \| LOCKLEAF;
	99	if (error = namei(ndp, p))
	100	return (error);
	101	vp = ndp->ni_vp;
	102	}
	103	if (vp->v_type == VSOCK) {
	104	error = EOPNOTSUPP;
	105	goto bad;
	106	}
	107	if ((fmode & O_CREAT) == 0) {
	108	if (fmode & FREAD) {
	109	if (error = VOP_ACCESS(vp, VREAD, cred, p))
	110	goto bad;
	111	}
	112	if (fmode & (FWRITE \| O_TRUNC)) {
	113	if (vp->v_type == VDIR) {
	114	error = EISDIR;
	115	goto bad;
	116	}
	117	if ((error = vn_writechk(vp)) \|\|
	118	(error = VOP_ACCESS(vp, VWRITE, cred, p)))
	119	goto bad;
	120	}
	121	}
122	if (fmode & O_TRUNC) {
123	VATTR_NULL(vap);
124	vap->va_size = 0;
125	if (error = VOP_SETATTR(vp, vap, cred, p))
126	goto bad;
127	}
128	if (error = VOP_OPEN(vp, fmode, cred, p))
129	goto bad;
130	if (fmode & FWRITE)
131	vp->v_writecount++;
132	return (0);
133	bad:
134	vput(vp);
135	return (error);
136	}
137
138	/*
139	* Check for write permissions on the specified vnode.
140	* The read-only status of the file system is checked.
141	* Also, prototype text segments cannot be written.
142	*/
4c45483e	143	int
15637ed4 RG	144	vn_writechk(vp)
	145	register struct vnode *vp;
	146	{
	147
	148	/*
	149	* Disallow write attempts on read-only file systems;
	150	* unless the file is a socket or a block or character
	151	* device resident on the file system.
	152	*/
	153	if (vp->v_mount->mnt_flag & MNT_RDONLY) {
	154	switch (vp->v_type) {
	155	case VREG: case VDIR: case VLNK:
	156	return (EROFS);
	157	}
	158	}
	159	/*
	160	* If there's shared text associated with
	161	* the vnode, try to free it up once. If
	162	* we fail, we can't allow writing.
	163	*/
	164	if ((vp->v_flag & VTEXT) && !vnode_pager_uncache(vp))
	165	return (ETXTBSY);
	166	return (0);
	167	}
	168
	169	/*
	170	* Vnode close call
	171	*/
4c45483e	172	int
15637ed4 RG	173	vn_close(vp, flags, cred, p)
	174	register struct vnode *vp;
	175	int flags;
	176	struct ucred *cred;
	177	struct proc *p;
	178	{
	179	int error;
	180
	181	if (flags & FWRITE)
	182	vp->v_writecount--;
	183	error = VOP_CLOSE(vp, flags, cred, p);
	184	vrele(vp);
	185	return (error);
	186	}
	187
	188	/*
	189	* Package up an I/O request on a vnode into a uio and do it.
	190	* [internal interface to file i/o for kernel only]
	191	*/
4c45483e	192	int
15637ed4 RG	193	vn_rdwr(rw, vp, base, len, offset, segflg, ioflg, cred, aresid, p)
	194	enum uio_rw rw;
	195	struct vnode *vp;
	196	caddr_t base;
	197	int len;
	198	off_t offset;
	199	enum uio_seg segflg;
	200	int ioflg;
	201	struct ucred *cred;
	202	int *aresid;
	203	struct proc *p;
	204	{
	205	struct uio auio;
	206	struct iovec aiov;
	207	int error;
	208
	209	if ((ioflg & IO_NODELOCKED) == 0)
	210	VOP_LOCK(vp);
	211	auio.uio_iov = &aiov;
	212	auio.uio_iovcnt = 1;
	213	aiov.iov_base = base;
	214	aiov.iov_len = len;
	215	auio.uio_resid = len;
	216	auio.uio_offset = offset;
	217	auio.uio_segflg = segflg;
	218	auio.uio_rw = rw;
	219	auio.uio_procp = p;
	220	if (rw == UIO_READ)
	221	error = VOP_READ(vp, &auio, ioflg, cred);
	222	else
	223	error = VOP_WRITE(vp, &auio, ioflg, cred);
	224	if (aresid)
	225	*aresid = auio.uio_resid;
	226	else
	227	if (auio.uio_resid && error == 0)
	228	error = EIO;
	229	if ((ioflg & IO_NODELOCKED) == 0)
	230	VOP_UNLOCK(vp);
	231	return (error);
	232	}
	233
	234	/*
	235	* File table vnode read routine.
	236	*/
4c45483e	237	int
15637ed4 RG	238	vn_read(fp, uio, cred)
	239	struct file *fp;
	240	struct uio *uio;
	241	struct ucred *cred;
	242	{
	243	register struct vnode vp = (struct vnode )fp->f_data;
	244	int count, error;
	245
	246	VOP_LOCK(vp);
	247	uio->uio_offset = fp->f_offset;
	248	count = uio->uio_resid;
	249	error = VOP_READ(vp, uio, (fp->f_flag & FNONBLOCK) ? IO_NDELAY : 0,
	250	cred);
	251	fp->f_offset += count - uio->uio_resid;
	252	VOP_UNLOCK(vp);
	253	return (error);
	254	}
	255
	256	/*
	257	* File table vnode write routine.
	258	*/
4c45483e	259	int
15637ed4 RG	260	vn_write(fp, uio, cred)
	261	struct file *fp;
	262	struct uio *uio;
	263	struct ucred *cred;
	264	{
	265	register struct vnode vp = (struct vnode )fp->f_data;
	266	int count, error, ioflag = 0;
	267
	268	if (vp->v_type == VREG && (fp->f_flag & O_APPEND))
	269	ioflag \|= IO_APPEND;
	270	if (fp->f_flag & FNONBLOCK)
	271	ioflag \|= IO_NDELAY;
	272	VOP_LOCK(vp);
	273	uio->uio_offset = fp->f_offset;
	274	count = uio->uio_resid;
	275	error = VOP_WRITE(vp, uio, ioflag, cred);
	276	if (ioflag & IO_APPEND)
	277	fp->f_offset = uio->uio_offset;
	278	else
	279	fp->f_offset += count - uio->uio_resid;
	280	VOP_UNLOCK(vp);
	281	return (error);
	282	}
	283
	284	/*
	285	* File table vnode stat routine.
	286	*/
4c45483e	287	int
15637ed4 RG	288	vn_stat(vp, sb, p)
	289	struct vnode *vp;
	290	register struct stat *sb;
	291	struct proc *p;
	292	{
	293	struct vattr vattr;
	294	register struct vattr *vap;
	295	int error;
	296	u_short mode;
	297
	298	vap = &vattr;
	299	error = VOP_GETATTR(vp, vap, p->p_ucred, p);
	300	if (error)
	301	return (error);
	302	/*
	303	* Copy from vattr table
	304	*/
	305	sb->st_dev = vap->va_fsid;
	306	sb->st_ino = vap->va_fileid;
	307	mode = vap->va_mode;
	308	switch (vp->v_type) {
	309	case VREG:
317350b1	310	case VPROC:
15637ed4 RG	311	mode \|= S_IFREG;
	312	break;
	313	case VDIR:
	314	mode \|= S_IFDIR;
	315	break;
	316	case VBLK:
	317	mode \|= S_IFBLK;
	318	break;
	319	case VCHR:
	320	mode \|= S_IFCHR;
	321	break;
	322	case VLNK:
	323	mode \|= S_IFLNK;
	324	break;
	325	case VSOCK:
	326	mode \|= S_IFSOCK;
	327	break;
	328	case VFIFO:
	329	mode \|= S_IFIFO;
	330	break;
	331	default:
	332	return (EBADF);
	333	};
	334	sb->st_mode = mode;
	335	sb->st_nlink = vap->va_nlink;
	336	sb->st_uid = vap->va_uid;
	337	sb->st_gid = vap->va_gid;
	338	sb->st_rdev = vap->va_rdev;
	339	sb->st_size = vap->va_size;
	340	sb->st_atime = vap->va_atime.tv_sec;
	341	sb->st_spare1 = 0;
	342	sb->st_mtime = vap->va_mtime.tv_sec;
	343	sb->st_spare2 = 0;
	344	sb->st_ctime = vap->va_ctime.tv_sec;
	345	sb->st_spare3 = 0;
	346	sb->st_blksize = vap->va_blocksize;
	347	sb->st_flags = vap->va_flags;
	348	sb->st_gen = vap->va_gen;
	349	sb->st_blocks = vap->va_bytes / S_BLKSIZE;
	350	return (0);
	351	}
	352
	353	/*
	354	* File table vnode ioctl routine.
	355	*/
4c45483e	356	int
15637ed4 RG	357	vn_ioctl(fp, com, data, p)
	358	struct file *fp;
	359	int com;
	360	caddr_t data;
	361	struct proc *p;
	362	{
	363	register struct vnode vp = ((struct vnode )fp->f_data);
	364	struct vattr vattr;
	365	int error;
	366
	367	switch (vp->v_type) {
	368
	369	case VREG:
	370	case VDIR:
	371	if (com == FIONREAD) {
	372	if (error = VOP_GETATTR(vp, &vattr, p->p_ucred, p))
	373	return (error);
	374	(off_t )data = vattr.va_size - fp->f_offset;
	375	return (0);
	376	}
	377	if (com == FIONBIO \|\| com == FIOASYNC) /* XXX */
	378	return (0); /* XXX */
	379	/* fall into ... */
	380
	381	default:
	382	return (ENOTTY);
	383
	384	case VFIFO:
	385	case VCHR:
	386	case VBLK:
	387	error = VOP_IOCTL(vp, com, data, fp->f_flag, p->p_ucred, p);
	388	if (error == 0 && com == TIOCSCTTY) {
	389	p->p_session->s_ttyvp = vp;
	390	VREF(vp);
	391	}
	392	return (error);
	393	}
	394	}
	395
	396	/*
	397	* File table vnode select routine.
	398	*/
4c45483e	399	int
15637ed4 RG	400	vn_select(fp, which, p)
	401	struct file *fp;
	402	int which;
	403	struct proc *p;
	404	{
	405
	406	return (VOP_SELECT(((struct vnode *)fp->f_data), which, fp->f_flag,
	407	fp->f_cred, p));
	408	}
	409
	410	/*
	411	* File table vnode close routine.
	412	*/
4c45483e	413	int
15637ed4 RG	414	vn_closefile(fp, p)
	415	struct file *fp;
	416	struct proc *p;
	417	{
	418
	419	return (vn_close(((struct vnode *)fp->f_data), fp->f_flag,
	420	fp->f_cred, p));
	421	}
	422
	423	/*
	424	* vn_fhtovp() - convert a fh to a vnode ptr (optionally locked)
	425	* - look up fsid in mount list (if not found ret error)
	426	* - get vp by calling VFS_FHTOVP() macro
	427	* - if lockflag lock it with VOP_LOCK()
	428	*/
4c45483e	429	int
15637ed4 RG	430	vn_fhtovp(fhp, lockflag, vpp)
	431	fhandle_t *fhp;
	432	int lockflag;
	433	struct vnode **vpp;
	434	{
	435	register struct mount *mp;
	436
	437	if ((mp = getvfs(&fhp->fh_fsid)) == NULL)
	438	return (ESTALE);
	439	if (VFS_FHTOVP(mp, &fhp->fh_fid, vpp))
	440	return (ESTALE);
	441	if (!lockflag)
	442	VOP_UNLOCK(*vpp);
	443	return (0);
	444	}