[apple/xnu.git] / bsd / miscfs / umapfs / umap_vfsops.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*	$NetBSD: umap_vfsops.c,v 1.7 1995/03/09 12:05:59 mycroft Exp $	*/

/*
 * 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.
 *
 *	from: @(#)null_vfsops.c       1.5 (Berkeley) 7/10/92
 *	@(#)umap_vfsops.c	8.3 (Berkeley) 1/21/94
 */

/*
 * 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;
	size_t 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 */
	MALLOC(amp, struct umap_mount *, sizeof(struct umap_mount),
				M_UFSMNT, M_WAITOK);

	/*
	 * 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, makefstype(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);
	}
	strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN);
	sbp->f_fstypename[MFSNAMELEN] = '\0';
	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 (EOPNOTSUPP);
}

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

	return (EOPNOTSUPP);
}

int umapfs_init __P((void));

struct vfsops umap_vfsops = {
	MOUNT_UMAP,
	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
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/* $NetBSD: umap_vfsops.c,v 1.7 1995/03/09 12:05:59 mycroft Exp $ */
	23
	24	/*
	25	* Copyright (c) 1992, 1993
	26	* The Regents of the University of California. All rights reserved.
	27	*
	28	* This code is derived from software donated to Berkeley by
	29	* the UCLA Ficus project.
	30	*
	31	* Redistribution and use in source and binary forms, with or without
	32	* modification, are permitted provided that the following conditions
	33	* are met:
	34	* 1. Redistributions of source code must retain the above copyright
	35	* notice, this list of conditions and the following disclaimer.
	36	* 2. Redistributions in binary form must reproduce the above copyright
	37	* notice, this list of conditions and the following disclaimer in the
	38	* documentation and/or other materials provided with the distribution.
	39	* 3. All advertising materials mentioning features or use of this software
	40	* must display the following acknowledgement:
	41	* This product includes software developed by the University of
	42	* California, Berkeley and its contributors.
	43	* 4. Neither the name of the University nor the names of its contributors
	44	* may be used to endorse or promote products derived from this software
	45	* without specific prior written permission.
	46	*
	47	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	48	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	49	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	50	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	51	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	52	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	53	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	54	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	55	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	56	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	57	* SUCH DAMAGE.
	58	*
	59	* from: @(#)null_vfsops.c 1.5 (Berkeley) 7/10/92
	60	* @(#)umap_vfsops.c 8.3 (Berkeley) 1/21/94
	61	*/
	62
	63	/*
	64	* Umap Layer
65	* (See mount_umap(8) for a description of this layer.)
66	*/
67
68	#include <sys/param.h>
69	#include <sys/systm.h>
70	#include <sys/time.h>
71	#include <sys/types.h>
72	#include <sys/vnode.h>
73	#include <sys/mount.h>
74	#include <sys/namei.h>
75	#include <sys/malloc.h>
76	#include <miscfs/umapfs/umap.h>
77
78	/*
79	* Mount umap layer
80	*/
81	int
82	umapfs_mount(mp, path, data, ndp, p)
83	struct mount *mp;
84	char *path;
85	caddr_t data;
86	struct nameidata *ndp;
87	struct proc *p;
88	{
89	struct umap_args args;
90	struct vnode lowerrootvp, vp;
91	struct vnode *umapm_rootvp;
92	struct umap_mount *amp;
93	size_t size;
94	int error;
95
96	#ifdef UMAPFS_DIAGNOSTIC
97	printf("umapfs_mount(mp = %x)\n", mp);
98	#endif
99
100	/*
101	* Update is a no-op
102	*/
103	if (mp->mnt_flag & MNT_UPDATE) {
104	return (EOPNOTSUPP);
105	/* return (VFS_MOUNT(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, path, data, ndp, p));*/
106	}
107
108	/*
109	* Get argument
110	*/
111	if (error = copyin(data, (caddr_t)&args, sizeof(struct umap_args)))
112	return (error);
113
114	/*
115	* Find lower node
116	*/
117	NDINIT(ndp, LOOKUP, FOLLOW\|WANTPARENT\|LOCKLEAF,
118	UIO_USERSPACE, args.target, p);
119	if (error = namei(ndp))
120	return (error);
121
122	/*
123	* Sanity check on lower vnode
124	*/
125	lowerrootvp = ndp->ni_vp;
126	#ifdef UMAPFS_DIAGNOSTIC
127	printf("vp = %x, check for VDIR...\n", lowerrootvp);
128	#endif
129	vrele(ndp->ni_dvp);
130	ndp->ni_dvp = 0;
131
132	if (lowerrootvp->v_type != VDIR) {
133	vput(lowerrootvp);
134	return (EINVAL);
135	}
136
137	#ifdef UMAPFS_DIAGNOSTIC
138	printf("mp = %x\n", mp);
139	#endif
140
141	// amp = (struct umap_mount *) malloc(sizeof(struct umap_mount),
142	// M_UFSMNT, M_WAITOK); /* XXX */
143	MALLOC(amp, struct umap_mount *, sizeof(struct umap_mount),
144	M_UFSMNT, M_WAITOK);
145
146	/*
147	* Save reference to underlying FS
148	*/
149	amp->umapm_vfs = lowerrootvp->v_mount;
150
151	/*
152	* Now copy in the number of entries and maps for umap mapping.
153	*/
154	amp->info_nentries = args.nentries;
155	amp->info_gnentries = args.gnentries;
156	error = copyin(args.mapdata, (caddr_t)amp->info_mapdata,
157	2sizeof(u_long)args.nentries);
158	if (error)
159	return (error);
160
161	#ifdef UMAP_DIAGNOSTIC
162	printf("umap_mount:nentries %d\n",args.nentries);
163	for (i = 0; i < args.nentries; i++)
164	printf(" %d maps to %d\n", amp->info_mapdata[i][0],
165	amp->info_mapdata[i][1]);
166	#endif
167
168	error = copyin(args.gmapdata, (caddr_t)amp->info_gmapdata,
169	2sizeof(u_long)args.nentries);
170	if (error)
171	return (error);
172
173	#ifdef UMAP_DIAGNOSTIC
174	printf("umap_mount:gnentries %d\n",args.gnentries);
175	for (i = 0; i < args.gnentries; i++)
176	printf(" group %d maps to %d\n",
177	amp->info_gmapdata[i][0],
178	amp->info_gmapdata[i][1]);
179	#endif
180
181
182	/*
183	* Save reference. Each mount also holds
184	* a reference on the root vnode.
185	*/
186	error = umap_node_create(mp, lowerrootvp, &vp);
187	/*
188	* Unlock the node (either the lower or the alias)
189	*/
190	VOP_UNLOCK(vp);
191	/*
192	* Make sure the node alias worked
193	*/
194	if (error) {
195	vrele(lowerrootvp);
196	free(amp, M_UFSMNT); /* XXX */
197	return (error);
198	}
199
200	/*
201	* Keep a held reference to the root vnode.
202	* It is vrele'd in umapfs_unmount.
203	*/
204	umapm_rootvp = vp;
205	umapm_rootvp->v_flag \|= VROOT;
206	amp->umapm_rootvp = umapm_rootvp;
207	if (UMAPVPTOLOWERVP(umapm_rootvp)->v_mount->mnt_flag & MNT_LOCAL)
208	mp->mnt_flag \|= MNT_LOCAL;
209	mp->mnt_data = (qaddr_t) amp;
210	getnewfsid(mp, makefstype(MOUNT_LOFS));
211
212	(void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
213	bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
214	(void) copyinstr(args.target, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
215	&size);
216	bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
217	#ifdef UMAPFS_DIAGNOSTIC
218	printf("umapfs_mount: lower %s, alias at %s\n",
219	mp->mnt_stat.f_mntfromname, mp->mnt_stat.f_mntonname);
220	#endif
221	return (0);
222	}
223
224	/*
225	* VFS start. Nothing needed here - the start routine
226	* on the underlying filesystem will have been called
227	* when that filesystem was mounted.
228	*/
229	int
230	umapfs_start(mp, flags, p)
231	struct mount *mp;
232	int flags;
233	struct proc *p;
234	{
235
236	return (0);
237	/* return (VFS_START(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, flags, p)); */
238	}
239
240	/*
241	* Free reference to umap layer
242	*/
243	int
244	umapfs_unmount(mp, mntflags, p)
245	struct mount *mp;
246	int mntflags;
247	struct proc *p;
248	{
249	struct vnode *umapm_rootvp = MOUNTTOUMAPMOUNT(mp)->umapm_rootvp;
250	int error;
251	int flags = 0;
252	extern int doforce;
253
254	#ifdef UMAPFS_DIAGNOSTIC
255	printf("umapfs_unmount(mp = %x)\n", mp);
256	#endif
257
258	if (mntflags & MNT_FORCE) {
259	/* lofs can never be rootfs so don't check for it */
260	if (!doforce)
261	return (EINVAL);
262	flags \|= FORCECLOSE;
263	}
264
265	/*
266	* Clear out buffer cache. I don't think we
267	* ever get anything cached at this level at the
268	* moment, but who knows...
269	*/
270	#ifdef notyet
271	mntflushbuf(mp, 0);
272	if (mntinvalbuf(mp, 1))
273	return (EBUSY);
274	#endif
275	if (umapm_rootvp->v_usecount > 1)
276	return (EBUSY);
277	if (error = vflush(mp, umapm_rootvp, flags))
278	return (error);
279
280	#ifdef UMAPFS_DIAGNOSTIC
281	vprint("alias root of lower", umapm_rootvp);
282	#endif
283	/*
284	* Release reference on underlying root vnode
285	*/
286	vrele(umapm_rootvp);
287	/*
288	* And blow it away for future re-use
289	*/
290	vgone(umapm_rootvp);
291	/*
292	* Finally, throw away the umap_mount structure
293	*/
294	free(mp->mnt_data, M_UFSMNT); /* XXX */
295	mp->mnt_data = 0;
296	return (0);
297	}
298
299	int
300	umapfs_root(mp, vpp)
301	struct mount *mp;
302	struct vnode **vpp;
303	{
304	struct vnode *vp;
305
306	#ifdef UMAPFS_DIAGNOSTIC
307	printf("umapfs_root(mp = %x, vp = %x->%x)\n", mp,
308	MOUNTTOUMAPMOUNT(mp)->umapm_rootvp,
309	UMAPVPTOLOWERVP(MOUNTTOUMAPMOUNT(mp)->umapm_rootvp)
310	);
311	#endif
312
313	/*
314	* Return locked reference to root.
315	*/
316	vp = MOUNTTOUMAPMOUNT(mp)->umapm_rootvp;
317	VREF(vp);
318	VOP_LOCK(vp);
319	*vpp = vp;
320	return (0);
321	}
322
323	int
324	umapfs_quotactl(mp, cmd, uid, arg, p)
325	struct mount *mp;
326	int cmd;
327	uid_t uid;
328	caddr_t arg;
329	struct proc *p;
330	{
331
332	return (VFS_QUOTACTL(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, cmd, uid, arg, p));
333	}
334
335	int
336	umapfs_statfs(mp, sbp, p)
337	struct mount *mp;
338	struct statfs *sbp;
339	struct proc *p;
340	{
341	int error;
342	struct statfs mstat;
343
344	#ifdef UMAPFS_DIAGNOSTIC
345	printf("umapfs_statfs(mp = %x, vp = %x->%x)\n", mp,
346	MOUNTTOUMAPMOUNT(mp)->umapm_rootvp,
347	UMAPVPTOLOWERVP(MOUNTTOUMAPMOUNT(mp)->umapm_rootvp)
348	);
349	#endif
350
351	bzero(&mstat, sizeof(mstat));
352
353	error = VFS_STATFS(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, &mstat, p);
354	if (error)
355	return (error);
356
357	/* now copy across the "interesting" information and fake the rest */
358	sbp->f_type = mstat.f_type;
359	sbp->f_flags = mstat.f_flags;
360	sbp->f_bsize = mstat.f_bsize;
361	sbp->f_iosize = mstat.f_iosize;
362	sbp->f_blocks = mstat.f_blocks;
363	sbp->f_bfree = mstat.f_bfree;
364	sbp->f_bavail = mstat.f_bavail;
365	sbp->f_files = mstat.f_files;
366	sbp->f_ffree = mstat.f_ffree;
367	if (sbp != &mp->mnt_stat) {
368	bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
369	bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
370	bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
371	}
372	strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN);
373	sbp->f_fstypename[MFSNAMELEN] = '\0';
374	return (0);
375	}
376
377	int
378	umapfs_sync(mp, waitfor, cred, p)
379	struct mount *mp;
380	int waitfor;
381	struct ucred *cred;
382	struct proc *p;
383	{
384
385	/*
386	* XXX - Assumes no data cached at umap layer.
387	*/
388	return (0);
389	}
390
391	int
392	umapfs_vget(mp, ino, vpp)
393	struct mount *mp;
394	ino_t ino;
395	struct vnode **vpp;
396	{
397
398	return (VFS_VGET(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, ino, vpp));
399	}
400
401	int
402	umapfs_fhtovp(mp, fidp, nam, vpp, exflagsp, credanonp)
403	struct mount *mp;
404	struct fid *fidp;
405	struct mbuf *nam;
406	struct vnode **vpp;
407	int *exflagsp;
408	struct ucred**credanonp;
409	{
410
411	return (EOPNOTSUPP);
412	}
413
414	int
415	umapfs_vptofh(vp, fhp)
416	struct vnode *vp;
417	struct fid *fhp;
418	{
419
420	return (EOPNOTSUPP);
421	}
422
423	int umapfs_init __P((void));
424
425	struct vfsops umap_vfsops = {
426	MOUNT_UMAP,
427	umapfs_mount,
428	umapfs_start,
429	umapfs_unmount,
430	umapfs_root,
431	umapfs_quotactl,
432	umapfs_statfs,
433	umapfs_sync,
434	umapfs_vget,
435	umapfs_fhtovp,
436	umapfs_vptofh,
437	umapfs_init,
438	};