[apple/xnu.git] / bsd / miscfs / portal / portal_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@
 */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
 * 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.
 *
 *	@(#)portal_vfsops.c	8.11 (Berkeley) 5/14/95
 *
 *	@(#)portal_vfsops.c	8.6 (Berkeley) 1/21/94
 */

/*
 * Portal Filesystem
 */

#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>

int
portal_init(vfsp)
	struct vfsconf *vfsp;
{

	return (0);
}

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

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

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

	if (error = getsock(p->p_fd, args.pa_socket, &fp))
		return (error);
	so = (struct socket *) fp->f_data;
	if (so->so_proto->pr_domain->dom_family != AF_UNIX)
		return (ESOCKTNOSUPPORT);

	fmp = (struct portalmount *) _MALLOC(sizeof(struct portalmount),
				 M_UFSMNT, M_WAITOK);	/* XXX */
	MALLOC(pnp, void *, sizeof(struct portalnode), M_TEMP, M_WAITOK);
	error = getnewvnode(VT_PORTAL, mp, portal_vnodeop_p, &rvp); /* XXX */
	if (error) {
		FREE(pnp, M_TEMP);
		FREE(fmp, M_UFSMNT);
		return (error);
	}
	rvp->v_data = pnp;

	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;

	(void)fref(fp);

	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);
	bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
	(void)copyinstr(args.pa_config,
	    mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
	bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);

#ifdef notdef
	bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
	bcopy("portal", mp->mnt_stat.f_mntfromname, sizeof("portal"));
#endif

	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))
		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.
	 */
	thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
	soshutdown((struct socket *) VFSTOPORTAL(mp)->pm_server->f_data, 2);
	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
	/*
	 * 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 proc *p = current_proc();	/* XXX */
	struct vnode *vp;

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

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

	sbp->f_flags = 0;
	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 */
	if (sbp != &mp->mnt_stat) {
		sbp->f_type = mp->mnt_vfc->vfc_typenum;
		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);
}

#define portal_fhtovp ((int (*) __P((struct mount *, struct fid *, \
	    struct mbuf *, struct vnode **, int *, struct ucred **)))eopnotsupp)
#define portal_quotactl ((int (*) __P((struct mount *, int, uid_t, caddr_t, \
	    struct proc *)))eopnotsupp)
#define portal_sync ((int (*) __P((struct mount *, int, struct ucred *, \
	    struct proc *)))nullop)
#define portal_sysctl ((int (*) __P((int *, u_int, void *, size_t *, void *, \
	    size_t, struct proc *)))eopnotsupp)
#define portal_vget ((int (*) __P((struct mount *, ino_t, struct vnode **))) \
	    eopnotsupp)
#define portal_vptofh ((int (*) __P((struct vnode *, struct fid *)))eopnotsupp)

struct vfsops portal_vfsops = {
	portal_mount,
	portal_start,
	portal_unmount,
	portal_root,
	portal_quotactl,
	portal_statfs,
	portal_sync,
	portal_vget,
	portal_fhtovp,
	portal_vptofh,
	portal_init,
	portal_sysctl,
};
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	/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
	23	/*
	24	* Copyright (c) 1992, 1993, 1995
	25	* The Regents of the University of California. All rights reserved.
	26	*
	27	* This code is derived from software donated to Berkeley by
	28	* Jan-Simon Pendry.
	29	*
	30	* Redistribution and use in source and binary forms, with or without
	31	* modification, are permitted provided that the following conditions
	32	* are met:
	33	* 1. Redistributions of source code must retain the above copyright
	34	* notice, this list of conditions and the following disclaimer.
	35	* 2. Redistributions in binary form must reproduce the above copyright
	36	* notice, this list of conditions and the following disclaimer in the
	37	* documentation and/or other materials provided with the distribution.
	38	* 3. All advertising materials mentioning features or use of this software
	39	* must display the following acknowledgement:
	40	* This product includes software developed by the University of
	41	* California, Berkeley and its contributors.
	42	* 4. Neither the name of the University nor the names of its contributors
	43	* may be used to endorse or promote products derived from this software
	44	* without specific prior written permission.
	45	*
	46	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	47	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	48	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	49	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	50	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	51	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	52	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	53	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	54	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	55	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	56	* SUCH DAMAGE.
	57	*
	58	* @(#)portal_vfsops.c 8.11 (Berkeley) 5/14/95
	59	*
	60	* @(#)portal_vfsops.c 8.6 (Berkeley) 1/21/94
	61	*/
	62
	63	/*
	64	* Portal Filesystem
65	*/
66
67	#include <sys/param.h>
68	#include <sys/systm.h>
69	#include <sys/time.h>
70	#include <sys/types.h>
71	#include <sys/proc.h>
72	#include <sys/filedesc.h>
73	#include <sys/file.h>
74	#include <sys/vnode.h>
75	#include <sys/mount.h>
76	#include <sys/namei.h>
77	#include <sys/malloc.h>
78	#include <sys/mbuf.h>
79	#include <sys/socket.h>
80	#include <sys/socketvar.h>
81	#include <sys/protosw.h>
82	#include <sys/domain.h>
83	#include <sys/un.h>
84	#include <miscfs/portal/portal.h>
85
86	int
87	portal_init(vfsp)
88	struct vfsconf *vfsp;
89	{
90
91	return (0);
92	}
93
94	/*
95	* Mount the per-process file descriptors (/dev/fd)
96	*/
97	int
98	portal_mount(mp, path, data, ndp, p)
99	struct mount *mp;
100	char *path;
101	caddr_t data;
102	struct nameidata *ndp;
103	struct proc *p;
104	{
105	struct file *fp;
106	struct portal_args args;
107	struct portalmount *fmp;
108	struct socket *so;
109	struct vnode *rvp;
110	u_int size;
111	int error;
112	struct portalnode *pnp;
113
114	/*
115	* Update is a no-op
116	*/
117	if (mp->mnt_flag & MNT_UPDATE)
118	return (EOPNOTSUPP);
119
120	if (error = copyin(data, (caddr_t) &args, sizeof(struct portal_args)))
121	return (error);
122
123	if (error = getsock(p->p_fd, args.pa_socket, &fp))
124	return (error);
125	so = (struct socket *) fp->f_data;
126	if (so->so_proto->pr_domain->dom_family != AF_UNIX)
127	return (ESOCKTNOSUPPORT);
128
129	fmp = (struct portalmount *) _MALLOC(sizeof(struct portalmount),
130	M_UFSMNT, M_WAITOK); /* XXX */
131	MALLOC(pnp, void *, sizeof(struct portalnode), M_TEMP, M_WAITOK);
132	error = getnewvnode(VT_PORTAL, mp, portal_vnodeop_p, &rvp); /* XXX */
133	if (error) {
134	FREE(pnp, M_TEMP);
135	FREE(fmp, M_UFSMNT);
136	return (error);
137	}
138	rvp->v_data = pnp;
139
140	rvp->v_type = VDIR;
141	rvp->v_flag \|= VROOT;
142	VTOPORTAL(rvp)->pt_arg = 0;
143	VTOPORTAL(rvp)->pt_size = 0;
144	VTOPORTAL(rvp)->pt_fileid = PORTAL_ROOTFILEID;
145	fmp->pm_root = rvp;
146	fmp->pm_server = fp;
147
148	(void)fref(fp);
149
150	mp->mnt_flag \|= MNT_LOCAL;
151	mp->mnt_data = (qaddr_t) fmp;
152	vfs_getnewfsid(mp);
153
154	(void)copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
155	bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
156	(void)copyinstr(args.pa_config,
157	mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
158	bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
159
160	#ifdef notdef
161	bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
162	bcopy("portal", mp->mnt_stat.f_mntfromname, sizeof("portal"));
163	#endif
164
165	return (0);
166	}
167
168	int
169	portal_start(mp, flags, p)
170	struct mount *mp;
171	int flags;
172	struct proc *p;
173	{
174
175	return (0);
176	}
177
178	int
179	portal_unmount(mp, mntflags, p)
180	struct mount *mp;
181	int mntflags;
182	struct proc *p;
183	{
184	struct vnode *rootvp = VFSTOPORTAL(mp)->pm_root;
185	int error, flags = 0;
186
187
188	if (mntflags & MNT_FORCE)
189	flags \|= FORCECLOSE;
190
191	/*
192	* Clear out buffer cache. I don't think we
193	* ever get anything cached at this level at the
194	* moment, but who knows...
195	*/
196	#ifdef notyet
197	mntflushbuf(mp, 0);
198	if (mntinvalbuf(mp, 1))
199	return (EBUSY);
200	#endif
201	if (rootvp->v_usecount > 1)
202	return (EBUSY);
203	if (error = vflush(mp, rootvp, flags))
204	return (error);
205
206	/*
207	* Release reference on underlying root vnode
208	*/
209	vrele(rootvp);
210	/*
211	* And blow it away for future re-use
212	*/
213	vgone(rootvp);
214	/*
215	* Shutdown the socket. This will cause the select in the
216	* daemon to wake up, and then the accept will get ECONNABORTED
217	* which it interprets as a request to go and bury itself.
218	*/
219	thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
220	soshutdown((struct socket *) VFSTOPORTAL(mp)->pm_server->f_data, 2);
221	thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
222	/*
223	* Discard reference to underlying file. Must call closef because
224	* this may be the last reference.
225	*/
226	closef(VFSTOPORTAL(mp)->pm_server, (struct proc *) 0);
227	/*
228	* Finally, throw away the portalmount structure
229	*/
230	_FREE(mp->mnt_data, M_UFSMNT); /* XXX */
231	mp->mnt_data = 0;
232	return (0);
233	}
234
235	int
236	portal_root(mp, vpp)
237	struct mount *mp;
238	struct vnode **vpp;
239	{
240	struct proc p = current_proc(); / XXX */
241	struct vnode *vp;
242
243	/*
244	* Return locked reference to root.
245	*/
246	vp = VFSTOPORTAL(mp)->pm_root;
247	VREF(vp);
248	vn_lock(vp, LK_EXCLUSIVE \| LK_RETRY, p);
249	*vpp = vp;
250	return (0);
251	}
252
253	int
254	portal_statfs(mp, sbp, p)
255	struct mount *mp;
256	struct statfs *sbp;
257	struct proc *p;
258	{
259
260	sbp->f_flags = 0;
261	sbp->f_bsize = DEV_BSIZE;
262	sbp->f_iosize = DEV_BSIZE;
263	sbp->f_blocks = 2; /* 1K to keep df happy */
264	sbp->f_bfree = 0;
265	sbp->f_bavail = 0;
266	sbp->f_files = 1; /* Allow for "." */
267	sbp->f_ffree = 0; /* See comments above */
268	if (sbp != &mp->mnt_stat) {
269	sbp->f_type = mp->mnt_vfc->vfc_typenum;
270	bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
271	bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
272	bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
273	}
274	return (0);
275	}
276
277	#define portal_fhtovp ((int () __P((struct mount , struct fid *, \
278	struct mbuf , struct vnode , int , struct ucred **)))eopnotsupp)
279	#define portal_quotactl ((int () __P((struct mount , int, uid_t, caddr_t, \
280	struct proc *)))eopnotsupp)
281	#define portal_sync ((int () __P((struct mount , int, struct ucred *, \
282	struct proc *)))nullop)
283	#define portal_sysctl ((int () __P((int , u_int, void , size_t , void *, \
284	size_t, struct proc *)))eopnotsupp)
285	#define portal_vget ((int () __P((struct mount , ino_t, struct vnode **))) \
286	eopnotsupp)
287	#define portal_vptofh ((int () __P((struct vnode , struct fid *)))eopnotsupp)
288
289	struct vfsops portal_vfsops = {
290	portal_mount,
291	portal_start,
292	portal_unmount,
293	portal_root,
294	portal_quotactl,
295	portal_statfs,
296	portal_sync,
297	portal_vget,
298	portal_fhtovp,
299	portal_vptofh,
300	portal_init,
301	portal_sysctl,
302	};