[unix-history] / usr / src / sys / miscfs / umapfs / umap_vfsops.c

/*
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software donated to Berkeley by
 * the UCLA Ficus project.
 *
 * 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.
 *
 *	@(#)umap_vfsops.c	8.3 (Berkeley) 1/21/94
 *
 * @(#)null_vfsops.c       1.5 (Berkeley) 7/10/92
 */

/*
 * Umap Layer
 * (See mount_umap(8) for a description of this layer.)
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/namei.h>
#include <sys/malloc.h>
#include <miscfs/umapfs/umap.h>

/*
 * Mount umap layer
 */
int
umapfs_mount(mp, path, data, ndp, p)
	struct mount *mp;
	char *path;
	caddr_t data;
	struct nameidata *ndp;
	struct proc *p;
{
	struct umap_args args;
	struct vnode *lowerrootvp, *vp;
	struct vnode *umapm_rootvp;
	struct umap_mount *amp;
	u_int size;
	int error;

#ifdef UMAPFS_DIAGNOSTIC
	printf("umapfs_mount(mp = %x)\n", mp);
#endif

	/*
	 * Update is a no-op
	 */
	if (mp->mnt_flag & MNT_UPDATE) {
		return (EOPNOTSUPP);
		/* return (VFS_MOUNT(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, path, data, ndp, p));*/
	}

	/*
	 * Get argument
	 */
	if (error = copyin(data, (caddr_t)&args, sizeof(struct umap_args)))
		return (error);

	/*
	 * Find lower node
	 */
	NDINIT(ndp, LOOKUP, FOLLOW|WANTPARENT|LOCKLEAF,
		UIO_USERSPACE, args.target, p);
	if (error = namei(ndp))
		return (error);

	/*
	 * Sanity check on lower vnode
	 */
	lowerrootvp = ndp->ni_vp;
#ifdef UMAPFS_DIAGNOSTIC
	printf("vp = %x, check for VDIR...\n", lowerrootvp);
#endif
	vrele(ndp->ni_dvp);
	ndp->ni_dvp = 0;

	if (lowerrootvp->v_type != VDIR) {
		vput(lowerrootvp);
		return (EINVAL);
	}

#ifdef UMAPFS_DIAGNOSTIC
	printf("mp = %x\n", mp);
#endif

	amp = (struct umap_mount *) malloc(sizeof(struct umap_mount),
				M_UFSMNT, M_WAITOK);	/* XXX */

	/*
	 * Save reference to underlying FS
	 */
	amp->umapm_vfs = lowerrootvp->v_mount;

	/* 
	 * Now copy in the number of entries and maps for umap mapping.
	 */
	amp->info_nentries = args.nentries;
	amp->info_gnentries = args.gnentries;
	error = copyin(args.mapdata, (caddr_t)amp->info_mapdata, 
	    2*sizeof(u_long)*args.nentries);
	if (error)
		return (error);

#ifdef UMAP_DIAGNOSTIC
	printf("umap_mount:nentries %d\n",args.nentries);
	for (i = 0; i < args.nentries; i++)
		printf("   %d maps to %d\n", amp->info_mapdata[i][0],
	 	    amp->info_mapdata[i][1]);
#endif

	error = copyin(args.gmapdata, (caddr_t)amp->info_gmapdata, 
	    2*sizeof(u_long)*args.nentries);
	if (error)
		return (error);

#ifdef UMAP_DIAGNOSTIC
	printf("umap_mount:gnentries %d\n",args.gnentries);
	for (i = 0; i < args.gnentries; i++)
		printf("	group %d maps to %d\n", 
		    amp->info_gmapdata[i][0],
	 	    amp->info_gmapdata[i][1]);
#endif


	/*
	 * Save reference.  Each mount also holds
	 * a reference on the root vnode.
	 */
	error = umap_node_create(mp, lowerrootvp, &vp);
	/*
	 * Unlock the node (either the lower or the alias)
	 */
	VOP_UNLOCK(vp);
	/*
	 * Make sure the node alias worked
	 */
	if (error) {
		vrele(lowerrootvp);
		free(amp, M_UFSMNT);	/* XXX */
		return (error);
	}

	/*
	 * Keep a held reference to the root vnode.
	 * It is vrele'd in umapfs_unmount.
	 */
	umapm_rootvp = vp;
	umapm_rootvp->v_flag |= VROOT;
	amp->umapm_rootvp = umapm_rootvp;
	if (UMAPVPTOLOWERVP(umapm_rootvp)->v_mount->mnt_flag & MNT_LOCAL)
		mp->mnt_flag |= MNT_LOCAL;
	mp->mnt_data = (qaddr_t) amp;
	getnewfsid(mp, MOUNT_LOFS);

	(void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
	bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
	(void) copyinstr(args.target, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 
	    &size);
	bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
#ifdef UMAPFS_DIAGNOSTIC
	printf("umapfs_mount: lower %s, alias at %s\n",
		mp->mnt_stat.f_mntfromname, mp->mnt_stat.f_mntonname);
#endif
	return (0);
}

/*
 * VFS start.  Nothing needed here - the start routine
 * on the underlying filesystem will have been called
 * when that filesystem was mounted.
 */
int
umapfs_start(mp, flags, p)
	struct mount *mp;
	int flags;
	struct proc *p;
{
	return (0);
	/* return (VFS_START(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, flags, p)); */
}

/*
 * Free reference to umap layer
 */
int
umapfs_unmount(mp, mntflags, p)
	struct mount *mp;
	int mntflags;
	struct proc *p;
{
	struct vnode *umapm_rootvp = MOUNTTOUMAPMOUNT(mp)->umapm_rootvp;
	int error;
	int flags = 0;
	extern int doforce;

#ifdef UMAPFS_DIAGNOSTIC
	printf("umapfs_unmount(mp = %x)\n", mp);
#endif

	if (mntflags & MNT_FORCE) {
		/* lofs can never be rootfs so don't check for it */
		if (!doforce)
			return (EINVAL);
		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 (umapm_rootvp->v_usecount > 1)
		return (EBUSY);
	if (error = vflush(mp, umapm_rootvp, flags))
		return (error);

#ifdef UMAPFS_DIAGNOSTIC
	vprint("alias root of lower", umapm_rootvp);
#endif	 
	/*
	 * Release reference on underlying root vnode
	 */
	vrele(umapm_rootvp);
	/*
	 * And blow it away for future re-use
	 */
	vgone(umapm_rootvp);
	/*
	 * Finally, throw away the umap_mount structure
	 */
	free(mp->mnt_data, M_UFSMNT);	/* XXX */
	mp->mnt_data = 0;
	return (0);
}

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

#ifdef UMAPFS_DIAGNOSTIC
	printf("umapfs_root(mp = %x, vp = %x->%x)\n", mp,
			MOUNTTOUMAPMOUNT(mp)->umapm_rootvp,
			UMAPVPTOLOWERVP(MOUNTTOUMAPMOUNT(mp)->umapm_rootvp)
			);
#endif

	/*
	 * Return locked reference to root.
	 */
	vp = MOUNTTOUMAPMOUNT(mp)->umapm_rootvp;
	VREF(vp);
	VOP_LOCK(vp);
	*vpp = vp;
	return (0);
}

int
umapfs_quotactl(mp, cmd, uid, arg, p)
	struct mount *mp;
	int cmd;
	uid_t uid;
	caddr_t arg;
	struct proc *p;
{
	return (VFS_QUOTACTL(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, cmd, uid, arg, p));
}

int
umapfs_statfs(mp, sbp, p)
	struct mount *mp;
	struct statfs *sbp;
	struct proc *p;
{
	int error;
	struct statfs mstat;

#ifdef UMAPFS_DIAGNOSTIC
	printf("umapfs_statfs(mp = %x, vp = %x->%x)\n", mp,
			MOUNTTOUMAPMOUNT(mp)->umapm_rootvp,
			UMAPVPTOLOWERVP(MOUNTTOUMAPMOUNT(mp)->umapm_rootvp)
			);
#endif

	bzero(&mstat, sizeof(mstat));

	error = VFS_STATFS(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, &mstat, p);
	if (error)
		return (error);

	/* now copy across the "interesting" information and fake the rest */
	sbp->f_type = mstat.f_type;
	sbp->f_flags = mstat.f_flags;
	sbp->f_bsize = mstat.f_bsize;
	sbp->f_iosize = mstat.f_iosize;
	sbp->f_blocks = mstat.f_blocks;
	sbp->f_bfree = mstat.f_bfree;
	sbp->f_bavail = mstat.f_bavail;
	sbp->f_files = mstat.f_files;
	sbp->f_ffree = mstat.f_ffree;
	if (sbp != &mp->mnt_stat) {
		bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
		bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
		bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
	}
	return (0);
}

int
umapfs_sync(mp, waitfor, cred, p)
	struct mount *mp;
	int waitfor;
	struct ucred *cred;
	struct proc *p;
{
	/*
	 * XXX - Assumes no data cached at umap layer.
	 */
	return (0);
}

int
umapfs_vget(mp, ino, vpp)
	struct mount *mp;
	ino_t ino;
	struct vnode **vpp;
{
	
	return (VFS_VGET(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, ino, vpp));
}

int
umapfs_fhtovp(mp, fidp, nam, vpp, exflagsp, credanonp)
	struct mount *mp;
	struct fid *fidp;
	struct mbuf *nam;
	struct vnode **vpp;
	int *exflagsp;
	struct ucred**credanonp;
{

	return (VFS_FHTOVP(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, fidp, nam, vpp, exflagsp,credanonp));
}

int
umapfs_vptofh(vp, fhp)
	struct vnode *vp;
	struct fid *fhp;
{
	return (VFS_VPTOFH(UMAPVPTOLOWERVP(vp), fhp));
}

int umapfs_init __P((void));

struct vfsops umap_vfsops = {
	umapfs_mount,
	umapfs_start,
	umapfs_unmount,
	umapfs_root,
	umapfs_quotactl,
	umapfs_statfs,
	umapfs_sync,
	umapfs_vget,
	umapfs_fhtovp,
	umapfs_vptofh,
	umapfs_init,
};
Commit	Line	Data
461c058b	1	/*
ad787160 C	2	* Copyright (c) 1992, 1993
ad787160 C	3	* The Regents of the University of California. All rights reserved.
461c058b JH	4	*
461c058b JH	5	* This code is derived from software donated to Berkeley by
e0851395	6	* the UCLA Ficus project.
461c058b	7	*
ad787160 C	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
	16	* 3. All advertising materials mentioning features or use of this software
	17	* must display the following acknowledgement:
	18	* This product includes software developed by the University of
	19	* California, Berkeley and its contributors.
	20	* 4. Neither the name of the University nor the names of its contributors
	21	* may be used to endorse or promote products derived from this software
	22	* without specific prior written permission.
461c058b	23	*
ad787160 C	24	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	25	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	26	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	27	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	28	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	29	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	30	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	31	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	32	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	33	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	34	* SUCH DAMAGE.
	35	*
ed554bc5	36	* @(#)umap_vfsops.c 8.3 (Berkeley) 1/21/94
461c058b	37	*
e0851395	38	* @(#)null_vfsops.c 1.5 (Berkeley) 7/10/92
461c058b JH	39	*/
	40
	41	/*
e0851395	42	* Umap Layer
ddcb8262	43	* (See mount_umap(8) for a description of this layer.)
461c058b JH	44	*/
	45
	46	#include <sys/param.h>
	47	#include <sys/systm.h>
	48	#include <sys/time.h>
	49	#include <sys/types.h>
	50	#include <sys/vnode.h>
	51	#include <sys/mount.h>
	52	#include <sys/namei.h>
	53	#include <sys/malloc.h>
ddcb8262	54	#include <miscfs/umapfs/umap.h>
461c058b JH	55
	56	/*
	57	* Mount umap layer
	58	*/
	59	int
	60	umapfs_mount(mp, path, data, ndp, p)
	61	struct mount *mp;
	62	char *path;
	63	caddr_t data;
	64	struct nameidata *ndp;
	65	struct proc *p;
	66	{
461c058b JH	67	struct umap_args args;
	68	struct vnode lowerrootvp, vp;
	69	struct vnode *umapm_rootvp;
	70	struct umap_mount *amp;
	71	u_int size;
33e96e24	72	int error;
461c058b JH	73
	74	#ifdef UMAPFS_DIAGNOSTIC
	75	printf("umapfs_mount(mp = %x)\n", mp);
	76	#endif
	77
	78	/*
	79	* Update is a no-op
	80	*/
	81	if (mp->mnt_flag & MNT_UPDATE) {
	82	return (EOPNOTSUPP);
33e96e24	83	/* return (VFS_MOUNT(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, path, data, ndp, p));*/
461c058b JH	84	}
	85
	86	/*
	87	* Get argument
	88	*/
	89	if (error = copyin(data, (caddr_t)&args, sizeof(struct umap_args)))
	90	return (error);
	91
	92	/*
e0851395	93	* Find lower node
461c058b JH	94	*/
	95	NDINIT(ndp, LOOKUP, FOLLOW\|WANTPARENT\|LOCKLEAF,
	96	UIO_USERSPACE, args.target, p);
	97	if (error = namei(ndp))
	98	return (error);
	99
	100	/*
e0851395	101	* Sanity check on lower vnode
461c058b JH	102	*/
	103	lowerrootvp = ndp->ni_vp;
	104	#ifdef UMAPFS_DIAGNOSTIC
	105	printf("vp = %x, check for VDIR...\n", lowerrootvp);
	106	#endif
	107	vrele(ndp->ni_dvp);
	108	ndp->ni_dvp = 0;
	109
461c058b JH	110	if (lowerrootvp->v_type != VDIR) {
	111	vput(lowerrootvp);
	112	return (EINVAL);
	113	}
	114
	115	#ifdef UMAPFS_DIAGNOSTIC
	116	printf("mp = %x\n", mp);
	117	#endif
	118
	119	amp = (struct umap_mount *) malloc(sizeof(struct umap_mount),
	120	M_UFSMNT, M_WAITOK); /* XXX */
	121
	122	/*
e0851395	123	* Save reference to underlying FS
461c058b JH	124	*/
	125	amp->umapm_vfs = lowerrootvp->v_mount;
	126
	127	/*
	128	* Now copy in the number of entries and maps for umap mapping.
	129	*/
461c058b JH	130	amp->info_nentries = args.nentries;
	131	amp->info_gnentries = args.gnentries;
	132	error = copyin(args.mapdata, (caddr_t)amp->info_mapdata,
33e96e24 KB	133	2sizeof(u_long)args.nentries);
	134	if (error)
	135	return (error);
e0851395 JH	136
e0851395 JH	137	#ifdef UMAP_DIAGNOSTIC
461c058b	138	printf("umap_mount:nentries %d\n",args.nentries);
e0851395	139	for (i = 0; i < args.nentries; i++)
461c058b JH	140	printf(" %d maps to %d\n", amp->info_mapdata[i][0],
461c058b JH	141	amp->info_mapdata[i][1]);
e0851395	142	#endif
461c058b JH	143
461c058b JH	144	error = copyin(args.gmapdata, (caddr_t)amp->info_gmapdata,
33e96e24 KB	145	2sizeof(u_long)args.nentries);
	146	if (error)
	147	return (error);
e0851395 JH	148
e0851395 JH	149	#ifdef UMAP_DIAGNOSTIC
461c058b	150	printf("umap_mount:gnentries %d\n",args.gnentries);
e0851395	151	for (i = 0; i < args.gnentries; i++)
461c058b JH	152	printf(" group %d maps to %d\n",
	153	amp->info_gmapdata[i][0],
	154	amp->info_gmapdata[i][1]);
e0851395	155	#endif
461c058b JH	156
	157
	158	/*
	159	* Save reference. Each mount also holds
	160	* a reference on the root vnode.
	161	*/
	162	error = umap_node_create(mp, lowerrootvp, &vp);
	163	/*
e0851395	164	* Unlock the node (either the lower or the alias)
461c058b JH	165	*/
	166	VOP_UNLOCK(vp);
	167	/*
	168	* Make sure the node alias worked
	169	*/
	170	if (error) {
	171	vrele(lowerrootvp);
	172	free(amp, M_UFSMNT); /* XXX */
	173	return (error);
	174	}
	175
	176	/*
	177	* Keep a held reference to the root vnode.
	178	* It is vrele'd in umapfs_unmount.
	179	*/
	180	umapm_rootvp = vp;
	181	umapm_rootvp->v_flag \|= VROOT;
	182	amp->umapm_rootvp = umapm_rootvp;
	183	if (UMAPVPTOLOWERVP(umapm_rootvp)->v_mount->mnt_flag & MNT_LOCAL)
	184	mp->mnt_flag \|= MNT_LOCAL;
	185	mp->mnt_data = (qaddr_t) amp;
	186	getnewfsid(mp, MOUNT_LOFS);
	187
	188	(void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
	189	bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
	190	(void) copyinstr(args.target, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
	191	&size);
	192	bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
	193	#ifdef UMAPFS_DIAGNOSTIC
e0851395	194	printf("umapfs_mount: lower %s, alias at %s\n",
461c058b JH	195	mp->mnt_stat.f_mntfromname, mp->mnt_stat.f_mntonname);
	196	#endif
	197	return (0);
	198	}
	199
	200	/*
	201	* VFS start. Nothing needed here - the start routine
	202	* on the underlying filesystem will have been called
	203	* when that filesystem was mounted.
	204	*/
	205	int
	206	umapfs_start(mp, flags, p)
	207	struct mount *mp;
	208	int flags;
	209	struct proc *p;
	210	{
	211	return (0);
33e96e24	212	/* return (VFS_START(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, flags, p)); */
461c058b JH	213	}
	214
	215	/*
	216	* Free reference to umap layer
	217	*/
	218	int
	219	umapfs_unmount(mp, mntflags, p)
	220	struct mount *mp;
	221	int mntflags;
	222	struct proc *p;
	223	{
	224	struct vnode *umapm_rootvp = MOUNTTOUMAPMOUNT(mp)->umapm_rootvp;
	225	int error;
	226	int flags = 0;
	227	extern int doforce;
	228
	229	#ifdef UMAPFS_DIAGNOSTIC
	230	printf("umapfs_unmount(mp = %x)\n", mp);
	231	#endif
	232
	233	if (mntflags & MNT_FORCE) {
	234	/* lofs can never be rootfs so don't check for it */
	235	if (!doforce)
	236	return (EINVAL);
	237	flags \|= FORCECLOSE;
	238	}
	239
	240	/*
	241	* Clear out buffer cache. I don't think we
	242	* ever get anything cached at this level at the
	243	* moment, but who knows...
	244	*/
fb250c6b	245	#ifdef notyet
461c058b JH	246	mntflushbuf(mp, 0);
	247	if (mntinvalbuf(mp, 1))
	248	return (EBUSY);
	249	#endif
	250	if (umapm_rootvp->v_usecount > 1)
	251	return (EBUSY);
	252	if (error = vflush(mp, umapm_rootvp, flags))
	253	return (error);
	254
	255	#ifdef UMAPFS_DIAGNOSTIC
e0851395	256	vprint("alias root of lower", umapm_rootvp);
461c058b JH	257	#endif
	258	/*
	259	* Release reference on underlying root vnode
	260	*/
	261	vrele(umapm_rootvp);
	262	/*
	263	* And blow it away for future re-use
	264	*/
	265	vgone(umapm_rootvp);
	266	/*
	267	* Finally, throw away the umap_mount structure
	268	*/
	269	free(mp->mnt_data, M_UFSMNT); /* XXX */
	270	mp->mnt_data = 0;
33e96e24	271	return (0);
461c058b JH	272	}
	273
	274	int
	275	umapfs_root(mp, vpp)
	276	struct mount *mp;
	277	struct vnode **vpp;
	278	{
	279	struct vnode *vp;
	280
	281	#ifdef UMAPFS_DIAGNOSTIC
	282	printf("umapfs_root(mp = %x, vp = %x->%x)\n", mp,
	283	MOUNTTOUMAPMOUNT(mp)->umapm_rootvp,
	284	UMAPVPTOLOWERVP(MOUNTTOUMAPMOUNT(mp)->umapm_rootvp)
	285	);
	286	#endif
	287
	288	/*
	289	* Return locked reference to root.
	290	*/
	291	vp = MOUNTTOUMAPMOUNT(mp)->umapm_rootvp;
	292	VREF(vp);
	293	VOP_LOCK(vp);
	294	*vpp = vp;
33e96e24	295	return (0);
461c058b JH	296	}
	297
	298	int
	299	umapfs_quotactl(mp, cmd, uid, arg, p)
	300	struct mount *mp;
	301	int cmd;
	302	uid_t uid;
	303	caddr_t arg;
	304	struct proc *p;
	305	{
33e96e24	306	return (VFS_QUOTACTL(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, cmd, uid, arg, p));
461c058b JH	307	}
	308
	309	int
	310	umapfs_statfs(mp, sbp, p)
	311	struct mount *mp;
	312	struct statfs *sbp;
	313	struct proc *p;
	314	{
	315	int error;
	316	struct statfs mstat;
	317
	318	#ifdef UMAPFS_DIAGNOSTIC
	319	printf("umapfs_statfs(mp = %x, vp = %x->%x)\n", mp,
	320	MOUNTTOUMAPMOUNT(mp)->umapm_rootvp,
	321	UMAPVPTOLOWERVP(MOUNTTOUMAPMOUNT(mp)->umapm_rootvp)
	322	);
	323	#endif
	324
	325	bzero(&mstat, sizeof(mstat));
	326
	327	error = VFS_STATFS(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, &mstat, p);
	328	if (error)
	329	return (error);
	330
	331	/* now copy across the "interesting" information and fake the rest */
	332	sbp->f_type = mstat.f_type;
	333	sbp->f_flags = mstat.f_flags;
	334	sbp->f_bsize = mstat.f_bsize;
	335	sbp->f_iosize = mstat.f_iosize;
	336	sbp->f_blocks = mstat.f_blocks;
	337	sbp->f_bfree = mstat.f_bfree;
	338	sbp->f_bavail = mstat.f_bavail;
	339	sbp->f_files = mstat.f_files;
	340	sbp->f_ffree = mstat.f_ffree;
	341	if (sbp != &mp->mnt_stat) {
	342	bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
	343	bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
	344	bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
	345	}
	346	return (0);
	347	}
	348
	349	int
	350	umapfs_sync(mp, waitfor, cred, p)
	351	struct mount *mp;
	352	int waitfor;
	353	struct ucred *cred;
	354	struct proc *p;
	355	{
	356	/*
	357	* XXX - Assumes no data cached at umap layer.
	358	*/
	359	return (0);
	360	}
	361
	362	int
	363	umapfs_vget(mp, ino, vpp)
	364	struct mount *mp;
	365	ino_t ino;
	366	struct vnode **vpp;
	367	{
	368
33e96e24	369	return (VFS_VGET(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, ino, vpp));
461c058b JH	370	}
	371
	372	int
	373	umapfs_fhtovp(mp, fidp, nam, vpp, exflagsp, credanonp)
	374	struct mount *mp;
	375	struct fid *fidp;
	376	struct mbuf *nam;
	377	struct vnode **vpp;
	378	int *exflagsp;
	379	struct ucred**credanonp;
	380	{
	381
33e96e24	382	return (VFS_FHTOVP(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, fidp, nam, vpp, exflagsp,credanonp));
461c058b JH	383	}
	384
	385	int
	386	umapfs_vptofh(vp, fhp)
	387	struct vnode *vp;
	388	struct fid *fhp;
	389	{
33e96e24	390	return (VFS_VPTOFH(UMAPVPTOLOWERVP(vp), fhp));
461c058b JH	391	}
	392
	393	int umapfs_init __P((void));
	394
	395	struct vfsops umap_vfsops = {
	396	umapfs_mount,
	397	umapfs_start,
	398	umapfs_unmount,
	399	umapfs_root,
	400	umapfs_quotactl,
	401	umapfs_statfs,
	402	umapfs_sync,
	403	umapfs_vget,
	404	umapfs_fhtovp,
	405	umapfs_vptofh,
	406	umapfs_init,
	407	};