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

/*
 * Copyright (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.
 */
/*
 * 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 1.6 1994/05/01 21:14:13 davidg 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 VPROC:
	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)) {
			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
169d8a33 RG	1	/*
	2	* Copyright (c) UNIX System Laboratories, Inc. All or some portions
	3	* of this file are derived from material licensed to the
	4	* University of California by American Telephone and Telegraph Co.
	5	* or UNIX System Laboratories, Inc. and are reproduced herein with
	6	* the permission of UNIX System Laboratories, Inc.
	7	*/
15637ed4 RG	8	/*
	9	* Copyright (c) 1982, 1986, 1989 Regents of the University of California.
	10	* All rights reserved.
	11	*
	12	* Redistribution and use in source and binary forms, with or without
	13	* modification, are permitted provided that the following conditions
	14	* are met:
	15	* 1. Redistributions of source code must retain the above copyright
	16	* notice, this list of conditions and the following disclaimer.
	17	* 2. Redistributions in binary form must reproduce the above copyright
	18	* notice, this list of conditions and the following disclaimer in the
	19	* documentation and/or other materials provided with the distribution.
	20	* 3. All advertising materials mentioning features or use of this software
	21	* must display the following acknowledgement:
	22	* This product includes software developed by the University of
	23	* California, Berkeley and its contributors.
	24	* 4. Neither the name of the University nor the names of its contributors
	25	* may be used to endorse or promote products derived from this software
	26	* without specific prior written permission.
	27	*
	28	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	29	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	30	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	31	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	32	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	33	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	34	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	35	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	36	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	37	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	38	* SUCH DAMAGE.
	39	*
600f7f07	40	* from: @(#)vfs_vnops.c 7.33 (Berkeley) 6/27/91
169d8a33	41	* $Id: vfs_vnops.c,v 1.6 1994/05/01 21:14:13 davidg Exp $
15637ed4 RG	42	*/
	43
	44	#include "param.h"
	45	#include "systm.h"
	46	#include "kernel.h"
	47	#include "file.h"
	48	#include "stat.h"
	49	#include "buf.h"
	50	#include "proc.h"
	51	#include "mount.h"
	52	#include "namei.h"
	53	#include "vnode.h"
	54	#include "ioctl.h"
	55	#include "tty.h"
	56
	57	struct fileops vnops =
	58	{ vn_read, vn_write, vn_ioctl, vn_select, vn_closefile };
	59
	60	/*
	61	* Common code for vnode open operations.
	62	* Check permissions, and call the VOP_OPEN or VOP_CREATE routine.
	63	*/
4c45483e	64	int
15637ed4 RG	65	vn_open(ndp, p, fmode, cmode)
	66	register struct nameidata *ndp;
	67	struct proc *p;
	68	int fmode, cmode;
	69	{
	70	register struct vnode *vp;
	71	register struct ucred *cred = p->p_ucred;
	72	struct vattr vat;
	73	struct vattr *vap = &vat;
	74	int error;
	75
	76	if (fmode & O_CREAT) {
	77	ndp->ni_nameiop = CREATE \| LOCKPARENT \| LOCKLEAF;
	78	if ((fmode & O_EXCL) == 0)
	79	ndp->ni_nameiop \|= FOLLOW;
	80	if (error = namei(ndp, p))
	81	return (error);
	82	if (ndp->ni_vp == NULL) {
	83	VATTR_NULL(vap);
	84	vap->va_type = VREG;
	85	vap->va_mode = cmode;
	86	if (error = VOP_CREATE(ndp, vap, p))
	87	return (error);
	88	fmode &= ~O_TRUNC;
	89	vp = ndp->ni_vp;
	90	} else {
	91	VOP_ABORTOP(ndp);
	92	if (ndp->ni_dvp == ndp->ni_vp)
	93	vrele(ndp->ni_dvp);
	94	else
	95	vput(ndp->ni_dvp);
	96	ndp->ni_dvp = NULL;
	97	vp = ndp->ni_vp;
	98	if (fmode & O_EXCL) {
	99	error = EEXIST;
	100	goto bad;
	101	}
	102	fmode &= ~O_CREAT;
	103	}
	104	} else {
	105	ndp->ni_nameiop = LOOKUP \| FOLLOW \| LOCKLEAF;
	106	if (error = namei(ndp, p))
	107	return (error);
	108	vp = ndp->ni_vp;
	109	}
	110	if (vp->v_type == VSOCK) {
	111	error = EOPNOTSUPP;
	112	goto bad;
	113	}
	114	if ((fmode & O_CREAT) == 0) {
	115	if (fmode & FREAD) {
	116	if (error = VOP_ACCESS(vp, VREAD, cred, p))
	117	goto bad;
	118	}
	119	if (fmode & (FWRITE \| O_TRUNC)) {
	120	if (vp->v_type == VDIR) {
	121	error = EISDIR;
	122	goto bad;
	123	}
	124	if ((error = vn_writechk(vp)) \|\|
	125	(error = VOP_ACCESS(vp, VWRITE, cred, p)))
	126	goto bad;
	127	}
	128	}
129	if (fmode & O_TRUNC) {
130	VATTR_NULL(vap);
131	vap->va_size = 0;
132	if (error = VOP_SETATTR(vp, vap, cred, p))
133	goto bad;
134	}
135	if (error = VOP_OPEN(vp, fmode, cred, p))
136	goto bad;
137	if (fmode & FWRITE)
138	vp->v_writecount++;
139	return (0);
140	bad:
141	vput(vp);
142	return (error);
143	}
144
145	/*
146	* Check for write permissions on the specified vnode.
147	* The read-only status of the file system is checked.
148	* Also, prototype text segments cannot be written.
149	*/
4c45483e	150	int
15637ed4 RG	151	vn_writechk(vp)
	152	register struct vnode *vp;
	153	{
	154
	155	/*
	156	* Disallow write attempts on read-only file systems;
	157	* unless the file is a socket or a block or character
	158	* device resident on the file system.
	159	*/
	160	if (vp->v_mount->mnt_flag & MNT_RDONLY) {
	161	switch (vp->v_type) {
	162	case VREG: case VDIR: case VLNK:
	163	return (EROFS);
	164	}
	165	}
	166	/*
	167	* If there's shared text associated with
	168	* the vnode, try to free it up once. If
	169	* we fail, we can't allow writing.
	170	*/
	171	if ((vp->v_flag & VTEXT) && !vnode_pager_uncache(vp))
	172	return (ETXTBSY);
	173	return (0);
	174	}
	175
	176	/*
	177	* Vnode close call
	178	*/
4c45483e	179	int
15637ed4 RG	180	vn_close(vp, flags, cred, p)
	181	register struct vnode *vp;
	182	int flags;
	183	struct ucred *cred;
	184	struct proc *p;
	185	{
	186	int error;
	187
	188	if (flags & FWRITE)
	189	vp->v_writecount--;
	190	error = VOP_CLOSE(vp, flags, cred, p);
	191	vrele(vp);
	192	return (error);
	193	}
	194
	195	/*
	196	* Package up an I/O request on a vnode into a uio and do it.
	197	* [internal interface to file i/o for kernel only]
	198	*/
4c45483e	199	int
15637ed4 RG	200	vn_rdwr(rw, vp, base, len, offset, segflg, ioflg, cred, aresid, p)
	201	enum uio_rw rw;
	202	struct vnode *vp;
	203	caddr_t base;
	204	int len;
	205	off_t offset;
	206	enum uio_seg segflg;
	207	int ioflg;
	208	struct ucred *cred;
	209	int *aresid;
	210	struct proc *p;
	211	{
	212	struct uio auio;
	213	struct iovec aiov;
	214	int error;
	215
	216	if ((ioflg & IO_NODELOCKED) == 0)
	217	VOP_LOCK(vp);
	218	auio.uio_iov = &aiov;
	219	auio.uio_iovcnt = 1;
	220	aiov.iov_base = base;
	221	aiov.iov_len = len;
	222	auio.uio_resid = len;
	223	auio.uio_offset = offset;
	224	auio.uio_segflg = segflg;
	225	auio.uio_rw = rw;
	226	auio.uio_procp = p;
	227	if (rw == UIO_READ)
	228	error = VOP_READ(vp, &auio, ioflg, cred);
	229	else
	230	error = VOP_WRITE(vp, &auio, ioflg, cred);
	231	if (aresid)
	232	*aresid = auio.uio_resid;
	233	else
	234	if (auio.uio_resid && error == 0)
	235	error = EIO;
	236	if ((ioflg & IO_NODELOCKED) == 0)
	237	VOP_UNLOCK(vp);
	238	return (error);
	239	}
	240
	241	/*
	242	* File table vnode read routine.
	243	*/
4c45483e	244	int
15637ed4 RG	245	vn_read(fp, uio, cred)
	246	struct file *fp;
	247	struct uio *uio;
	248	struct ucred *cred;
	249	{
	250	register struct vnode vp = (struct vnode )fp->f_data;
	251	int count, error;
	252
	253	VOP_LOCK(vp);
	254	uio->uio_offset = fp->f_offset;
	255	count = uio->uio_resid;
	256	error = VOP_READ(vp, uio, (fp->f_flag & FNONBLOCK) ? IO_NDELAY : 0,
	257	cred);
	258	fp->f_offset += count - uio->uio_resid;
	259	VOP_UNLOCK(vp);
	260	return (error);
	261	}
	262
	263	/*
	264	* File table vnode write routine.
	265	*/
4c45483e	266	int
15637ed4 RG	267	vn_write(fp, uio, cred)
	268	struct file *fp;
	269	struct uio *uio;
	270	struct ucred *cred;
	271	{
	272	register struct vnode vp = (struct vnode )fp->f_data;
	273	int count, error, ioflag = 0;
	274
	275	if (vp->v_type == VREG && (fp->f_flag & O_APPEND))
	276	ioflag \|= IO_APPEND;
	277	if (fp->f_flag & FNONBLOCK)
	278	ioflag \|= IO_NDELAY;
	279	VOP_LOCK(vp);
	280	uio->uio_offset = fp->f_offset;
	281	count = uio->uio_resid;
	282	error = VOP_WRITE(vp, uio, ioflag, cred);
	283	if (ioflag & IO_APPEND)
	284	fp->f_offset = uio->uio_offset;
	285	else
	286	fp->f_offset += count - uio->uio_resid;
	287	VOP_UNLOCK(vp);
	288	return (error);
	289	}
	290
	291	/*
	292	* File table vnode stat routine.
	293	*/
4c45483e	294	int
15637ed4 RG	295	vn_stat(vp, sb, p)
	296	struct vnode *vp;
	297	register struct stat *sb;
	298	struct proc *p;
	299	{
	300	struct vattr vattr;
	301	register struct vattr *vap;
	302	int error;
	303	u_short mode;
	304
	305	vap = &vattr;
	306	error = VOP_GETATTR(vp, vap, p->p_ucred, p);
	307	if (error)
	308	return (error);
	309	/*
	310	* Copy from vattr table
	311	*/
	312	sb->st_dev = vap->va_fsid;
	313	sb->st_ino = vap->va_fileid;
	314	mode = vap->va_mode;
	315	switch (vp->v_type) {
	316	case VREG:
317350b1	317	case VPROC:
15637ed4 RG	318	mode \|= S_IFREG;
	319	break;
	320	case VDIR:
	321	mode \|= S_IFDIR;
	322	break;
	323	case VBLK:
	324	mode \|= S_IFBLK;
	325	break;
	326	case VCHR:
	327	mode \|= S_IFCHR;
	328	break;
	329	case VLNK:
	330	mode \|= S_IFLNK;
	331	break;
	332	case VSOCK:
	333	mode \|= S_IFSOCK;
	334	break;
	335	case VFIFO:
	336	mode \|= S_IFIFO;
	337	break;
	338	default:
	339	return (EBADF);
	340	};
	341	sb->st_mode = mode;
	342	sb->st_nlink = vap->va_nlink;
	343	sb->st_uid = vap->va_uid;
	344	sb->st_gid = vap->va_gid;
	345	sb->st_rdev = vap->va_rdev;
	346	sb->st_size = vap->va_size;
	347	sb->st_atime = vap->va_atime.tv_sec;
	348	sb->st_spare1 = 0;
	349	sb->st_mtime = vap->va_mtime.tv_sec;
	350	sb->st_spare2 = 0;
	351	sb->st_ctime = vap->va_ctime.tv_sec;
	352	sb->st_spare3 = 0;
	353	sb->st_blksize = vap->va_blocksize;
	354	sb->st_flags = vap->va_flags;
	355	sb->st_gen = vap->va_gen;
	356	sb->st_blocks = vap->va_bytes / S_BLKSIZE;
	357	return (0);
	358	}
	359
	360	/*
	361	* File table vnode ioctl routine.
	362	*/
4c45483e	363	int
15637ed4 RG	364	vn_ioctl(fp, com, data, p)
	365	struct file *fp;
	366	int com;
	367	caddr_t data;
	368	struct proc *p;
	369	{
	370	register struct vnode vp = ((struct vnode )fp->f_data);
	371	struct vattr vattr;
	372	int error;
	373
	374	switch (vp->v_type) {
	375
	376	case VREG:
	377	case VDIR:
	378	if (com == FIONREAD) {
	379	if (error = VOP_GETATTR(vp, &vattr, p->p_ucred, p))
	380	return (error);
	381	(off_t )data = vattr.va_size - fp->f_offset;
	382	return (0);
	383	}
	384	if (com == FIONBIO \|\| com == FIOASYNC) /* XXX */
	385	return (0); /* XXX */
	386	/* fall into ... */
	387
	388	default:
	389	return (ENOTTY);
	390
22c84afa	391	case VPROC:
15637ed4 RG	392	case VFIFO:
	393	case VCHR:
	394	case VBLK:
	395	error = VOP_IOCTL(vp, com, data, fp->f_flag, p->p_ucred, p);
15c81350	396	if (error == 0 && com == TIOCSCTTY && (p->p_session->s_ttyvp != vp)) {
15637ed4 RG	397	p->p_session->s_ttyvp = vp;
	398	VREF(vp);
	399	}
	400	return (error);
	401	}
	402	}
	403
	404	/*
	405	* File table vnode select routine.
	406	*/
4c45483e	407	int
15637ed4 RG	408	vn_select(fp, which, p)
	409	struct file *fp;
	410	int which;
	411	struct proc *p;
	412	{
	413
	414	return (VOP_SELECT(((struct vnode *)fp->f_data), which, fp->f_flag,
	415	fp->f_cred, p));
	416	}
	417
	418	/*
	419	* File table vnode close routine.
	420	*/
4c45483e	421	int
15637ed4 RG	422	vn_closefile(fp, p)
	423	struct file *fp;
	424	struct proc *p;
	425	{
	426
	427	return (vn_close(((struct vnode *)fp->f_data), fp->f_flag,
	428	fp->f_cred, p));
	429	}
	430
	431	/*
	432	* vn_fhtovp() - convert a fh to a vnode ptr (optionally locked)
	433	* - look up fsid in mount list (if not found ret error)
	434	* - get vp by calling VFS_FHTOVP() macro
	435	* - if lockflag lock it with VOP_LOCK()
	436	*/
4c45483e	437	int
15637ed4 RG	438	vn_fhtovp(fhp, lockflag, vpp)
	439	fhandle_t *fhp;
	440	int lockflag;
	441	struct vnode **vpp;
	442	{
	443	register struct mount *mp;
	444
	445	if ((mp = getvfs(&fhp->fh_fsid)) == NULL)
	446	return (ESTALE);
	447	if (VFS_FHTOVP(mp, &fhp->fh_fid, vpp))
	448	return (ESTALE);
	449	if (!lockflag)
	450	VOP_UNLOCK(*vpp);
	451	return (0);
	452	}