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File: [cvs.NetBSD.org] / src / sys / miscfs / portal / Attic / portal_vfsops.c (download)

Revision 1.27, Sat Sep 15 16:12:59 2001 UTC (22 years, 6 months ago) by chs
Branch: MAIN
CVS Tags: thorpej-devvp-base3, thorpej-devvp-base2, pre-chs-ubcperf, post-chs-ubcperf
Branch point for: thorpej-mips-cache
Changes since 1.26: +2 -1 lines

add a new VFS op, vfs_reinit, which is called when desiredvnodes is
adjusted via sysctl.  file systems that have hash tables which are
sized based on the value of this variable now resize those hash tables
using the new value.  the max number of FFS softdeps is also recalculated.

convert various file systems to use the <sys/queue.h> macros for
their hash tables.

/*	$NetBSD: portal_vfsops.c,v 1.27 2001/09/15 16:12:59 chs Exp $	*/

/*
 * Copyright (c) 1992, 1993, 1995
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software donated to Berkeley by
 * Jan-Simon Pendry.
 *
 * 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: Id: portal_vfsops.c,v 1.5 1992/05/30 10:25:27 jsp Exp
 *	@(#)portal_vfsops.c	8.11 (Berkeley) 5/14/95
 */

/*
 * Portal Filesystem
 */

#if defined(_KERNEL_OPT)
#include "opt_compat_netbsd.h"
#endif

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/proc.h>
#include <sys/filedesc.h>
#include <sys/file.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/namei.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <sys/domain.h>
#include <sys/un.h>
#include <miscfs/portal/portal.h>

void	portal_init __P((void));
void	portal_done __P((void));
int	portal_mount __P((struct mount *, const char *, void *,
			  struct nameidata *, struct proc *));
int	portal_start __P((struct mount *, int, struct proc *));
int	portal_unmount __P((struct mount *, int, struct proc *));
int	portal_root __P((struct mount *, struct vnode **));
int	portal_quotactl __P((struct mount *, int, uid_t, caddr_t,
			     struct proc *));
int	portal_statfs __P((struct mount *, struct statfs *, struct proc *));
int	portal_sync __P((struct mount *, int, struct ucred *, struct proc *));
int	portal_vget __P((struct mount *, ino_t, struct vnode **));
int	portal_fhtovp __P((struct mount *, struct fid *, struct vnode **));
int	portal_checkexp __P((struct mount *, struct mbuf *, int *,
			   struct ucred **));
int	portal_vptofh __P((struct vnode *, struct fid *));
int	portal_sysctl __P((int *, u_int, void *, size_t *, void *, size_t,
			   struct proc *));

void
portal_init()
{
}

void
portal_done()
{
}

/*
 * Mount the per-process file descriptors (/dev/fd)
 */
int
portal_mount(mp, path, data, ndp, p)
	struct mount *mp;
	const char *path;
	void *data;
	struct nameidata *ndp;
	struct proc *p;
{
	struct file *fp;
	struct portal_args args;
	struct portalmount *fmp;
	struct socket *so;
	struct vnode *rvp;
	size_t size;
	int error;

	/*
	 * Update is a no-op
	 */
	if (mp->mnt_flag & MNT_UPDATE)
		return (EOPNOTSUPP);

	error = copyin(data, (caddr_t) &args, sizeof(struct portal_args));
	if (error)
		return (error);

	/* getsock() will use the descriptor for us */
	if ((error = getsock(p->p_fd, args.pa_socket, &fp)) != 0)
		return (error);
	so = (struct socket *) fp->f_data;
	FILE_UNUSE(fp, NULL);
	if (so->so_proto->pr_domain->dom_family != AF_LOCAL)
		return (ESOCKTNOSUPPORT);

	error = getnewvnode(VT_PORTAL, mp, portal_vnodeop_p, &rvp); /* XXX */
	if (error)
		return (error);
	MALLOC(rvp->v_data, void *, sizeof(struct portalnode),
		M_TEMP, M_WAITOK);

	fmp = (struct portalmount *) malloc(sizeof(struct portalmount),
				 M_UFSMNT, M_WAITOK);	/* XXX */
	rvp->v_type = VDIR;
	rvp->v_flag |= VROOT;
	VTOPORTAL(rvp)->pt_arg = 0;
	VTOPORTAL(rvp)->pt_size = 0;
	VTOPORTAL(rvp)->pt_fileid = PORTAL_ROOTFILEID;
	fmp->pm_root = rvp;
	fmp->pm_server = fp; fp->f_count++;

	mp->mnt_flag |= MNT_LOCAL;
	mp->mnt_data = (qaddr_t)fmp;
	vfs_getnewfsid(mp);

	(void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
	memset(mp->mnt_stat.f_mntonname + size, 0, MNAMELEN - size);
	(void) copyinstr(args.pa_config, mp->mnt_stat.f_mntfromname,
	    MNAMELEN - 1, &size);
	memset(mp->mnt_stat.f_mntfromname + size, 0, MNAMELEN - size);
	return (0);
}

int
portal_start(mp, flags, p)
	struct mount *mp;
	int flags;
	struct proc *p;
{

	return (0);
}

int
portal_unmount(mp, mntflags, p)
	struct mount *mp;
	int mntflags;
	struct proc *p;
{
	struct vnode *rootvp = VFSTOPORTAL(mp)->pm_root;
	int error, flags = 0;

	if (mntflags & MNT_FORCE)
		flags |= FORCECLOSE;

	/*
	 * Clear out buffer cache.  I don't think we
	 * ever get anything cached at this level at the
	 * moment, but who knows...
	 */
#ifdef notyet
	mntflushbuf(mp, 0); 
	if (mntinvalbuf(mp, 1))
		return (EBUSY);
#endif
	if (rootvp->v_usecount > 1)
		return (EBUSY);
	if ((error = vflush(mp, rootvp, flags)) != 0)
		return (error);

	/*
	 * Release reference on underlying root vnode
	 */
	vrele(rootvp);
	/*
	 * And blow it away for future re-use
	 */
	vgone(rootvp);
	/*
	 * Shutdown the socket.  This will cause the select in the
	 * daemon to wake up, and then the accept will get ECONNABORTED
	 * which it interprets as a request to go and bury itself.
	 */
	FILE_USE(VFSTOPORTAL(mp)->pm_server);
	soshutdown((struct socket *) VFSTOPORTAL(mp)->pm_server->f_data, 2);
	/*
	 * Discard reference to underlying file.  Must call closef because
	 * this may be the last reference.
	 */
	closef(VFSTOPORTAL(mp)->pm_server, (struct proc *) 0);
	/*
	 * Finally, throw away the portalmount structure
	 */
	free(mp->mnt_data, M_UFSMNT);	/* XXX */
	mp->mnt_data = 0;
	return (0);
}

int
portal_root(mp, vpp)
	struct mount *mp;
	struct vnode **vpp;
{
	struct vnode *vp;

	/*
	 * Return locked reference to root.
	 */
	vp = VFSTOPORTAL(mp)->pm_root;
	VREF(vp);
	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
	*vpp = vp;
	return (0);
}

int
portal_quotactl(mp, cmd, uid, arg, p)
	struct mount *mp;
	int cmd;
	uid_t uid;
	caddr_t arg;
	struct proc *p;
{

	return (EOPNOTSUPP);
}

int
portal_statfs(mp, sbp, p)
	struct mount *mp;
	struct statfs *sbp;
	struct proc *p;
{

	sbp->f_bsize = DEV_BSIZE;
	sbp->f_iosize = DEV_BSIZE;
	sbp->f_blocks = 2;		/* 1K to keep df happy */
	sbp->f_bfree = 0;
	sbp->f_bavail = 0;
	sbp->f_files = 1;		/* Allow for "." */
	sbp->f_ffree = 0;		/* See comments above */
#ifdef COMPAT_09
	sbp->f_type = 12;
#else
	sbp->f_type = 0;
#endif
	if (sbp != &mp->mnt_stat) {
		memcpy(&sbp->f_fsid, &mp->mnt_stat.f_fsid, sizeof(sbp->f_fsid));
		memcpy(sbp->f_mntonname, mp->mnt_stat.f_mntonname, MNAMELEN);
		memcpy(sbp->f_mntfromname, mp->mnt_stat.f_mntfromname, MNAMELEN);
	}
	strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN);
	return (0);
}

/*ARGSUSED*/
int
portal_sync(mp, waitfor, uc, p)
	struct mount *mp;
	int waitfor;
	struct ucred *uc;
	struct proc *p;
{

	return (0);
}

int
portal_vget(mp, ino, vpp)
	struct mount *mp;
	ino_t ino;
	struct vnode **vpp;
{

	return (EOPNOTSUPP);
}

int
portal_fhtovp(mp, fhp, vpp)
	struct mount *mp;
	struct fid *fhp;
	struct vnode **vpp;
{

	return (EOPNOTSUPP);
}

int
portal_checkexp(mp, mb, what, anon)
	struct mount *mp;
	struct mbuf *mb;
	int *what;
	struct ucred **anon;
{

	return (EOPNOTSUPP);
}

int
portal_vptofh(vp, fhp)
	struct vnode *vp;
	struct fid *fhp;
{

	return (EOPNOTSUPP);
}

int
portal_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
	int *name;
	u_int namelen;
	void *oldp;
	size_t *oldlenp;
	void *newp;
	size_t newlen;
	struct proc *p;
{
	return (EOPNOTSUPP);
}

extern const struct vnodeopv_desc portal_vnodeop_opv_desc;

const struct vnodeopv_desc * const portal_vnodeopv_descs[] = {
	&portal_vnodeop_opv_desc,
	NULL,
};

struct vfsops portal_vfsops = {
	MOUNT_PORTAL,
	portal_mount,
	portal_start,
	portal_unmount,
	portal_root,
	portal_quotactl,
	portal_statfs,
	portal_sync,
	portal_vget,
	portal_fhtovp,
	portal_vptofh,
	portal_init,
	NULL,
	portal_done,
	portal_sysctl,
	NULL,				/* vfs_mountroot */
	portal_checkexp,
	portal_vnodeopv_descs,
};