1*53845Spendry /*
2*53845Spendry  * Copyright (c) 1992 The Regents of the University of California
3*53845Spendry  * Copyright (c) 1990, 1992 Jan-Simon Pendry
4*53845Spendry  * All rights reserved.
5*53845Spendry  *
6*53845Spendry  * This code is derived from software donated to Berkeley by
7*53845Spendry  * Jan-Simon Pendry.
8*53845Spendry  *
9*53845Spendry  * %sccs.include.redist.c%
10*53845Spendry  *
11*53845Spendry  *	@(#)portal_vfsops.c	1.1 (Berkeley) 06/03/92
12*53845Spendry  *
13*53845Spendry  * $Id: portal_vfsops.c,v 1.5 1992/05/30 10:25:27 jsp Exp jsp $
14*53845Spendry  */
15*53845Spendry 
16*53845Spendry /*
17*53845Spendry  * Portal Filesystem
18*53845Spendry  */
19*53845Spendry 
20*53845Spendry #include <sys/param.h>
21*53845Spendry #include <sys/systm.h>
22*53845Spendry #include <sys/time.h>
23*53845Spendry #include <sys/types.h>
24*53845Spendry #include <sys/proc.h>
25*53845Spendry /*#include <sys/resourcevar.h>*/
26*53845Spendry #include <sys/filedesc.h>
27*53845Spendry #include <sys/file.h>
28*53845Spendry #include <sys/vnode.h>
29*53845Spendry #include <sys/mount.h>
30*53845Spendry #include <sys/namei.h>
31*53845Spendry #include <sys/malloc.h>
32*53845Spendry #include <sys/mbuf.h>
33*53845Spendry #include <sys/socket.h>
34*53845Spendry #include <sys/socketvar.h>
35*53845Spendry #include <sys/protosw.h>
36*53845Spendry #include <sys/domain.h>
37*53845Spendry #include <sys/un.h>
38*53845Spendry #include <portal/portal.h>
39*53845Spendry 
40*53845Spendry static u_short portal_mntid;
41*53845Spendry 
42*53845Spendry int portal_init()
43*53845Spendry {
44*53845Spendry #ifdef PORTAL_DIAGNOSTIC
45*53845Spendry 	printf("portal_init\n");		/* printed during system boot */
46*53845Spendry #endif
47*53845Spendry }
48*53845Spendry 
49*53845Spendry /*
50*53845Spendry  * Mount the per-process file descriptors (/dev/fd)
51*53845Spendry  */
52*53845Spendry portal_mount(mp, path, data, ndp, p)
53*53845Spendry 	struct mount *mp;
54*53845Spendry 	char *path;
55*53845Spendry 	caddr_t data;
56*53845Spendry 	struct nameidata *ndp;
57*53845Spendry 	struct proc *p;
58*53845Spendry {
59*53845Spendry 	int error = 0;
60*53845Spendry 	struct portal_args args;
61*53845Spendry 	u_int size;
62*53845Spendry 	struct portalmount *fmp;
63*53845Spendry 	struct vnode *rvp;
64*53845Spendry 	struct sockaddr_un *unp;
65*53845Spendry 	struct file *fp;
66*53845Spendry 	struct socket *so;
67*53845Spendry 	char cfile[MAXPATHLEN];
68*53845Spendry 
69*53845Spendry #ifdef PORTAL_DIAGNOSTIC
70*53845Spendry 	printf("portal_mount(mp = %x)\n", mp);
71*53845Spendry #endif
72*53845Spendry 
73*53845Spendry 	/*
74*53845Spendry 	 * Update is a no-op
75*53845Spendry 	 */
76*53845Spendry 	if (mp->mnt_flag & MNT_UPDATE)
77*53845Spendry 		return (EOPNOTSUPP);
78*53845Spendry 
79*53845Spendry 	if (error = copyin(data, (caddr_t) &args, sizeof(struct portal_args)))
80*53845Spendry 		return (error);
81*53845Spendry 
82*53845Spendry 	if (error = getsock(p->p_fd, args.pa_socket, &fp))
83*53845Spendry 		return (error);
84*53845Spendry 	so = (struct socket *) fp->f_data;
85*53845Spendry 	if (so->so_proto->pr_domain->dom_family != AF_UNIX)
86*53845Spendry 		return (ESOCKTNOSUPPORT);
87*53845Spendry 
88*53845Spendry 	error = getnewvnode(VT_UFS, mp, portal_vnodeop_p, &rvp); /* XXX */
89*53845Spendry 	if (error)
90*53845Spendry 		return (error);
91*53845Spendry 	MALLOC(rvp->v_data, void *, sizeof(struct portalnode),
92*53845Spendry 		M_TEMP, M_WAITOK);
93*53845Spendry 
94*53845Spendry 	fmp = (struct portalmount *) malloc(sizeof(struct portalmount),
95*53845Spendry 				 M_UFSMNT, M_WAITOK);	/* XXX */
96*53845Spendry 	rvp->v_type = VDIR;
97*53845Spendry 	rvp->v_flag |= VROOT;
98*53845Spendry 	VTOPORTAL(rvp)->pt_arg = 0;
99*53845Spendry 	VTOPORTAL(rvp)->pt_size = 0;
100*53845Spendry 	VTOPORTAL(rvp)->pt_fileid = PORTAL_ROOTFILEID;
101*53845Spendry #ifdef PORTAL_DIAGNOSTIC
102*53845Spendry 	printf("portal_mount: root vp = %x\n", rvp);
103*53845Spendry #endif
104*53845Spendry 	fmp->pm_root = rvp;
105*53845Spendry 	fmp->pm_server = fp; fp->f_count++;
106*53845Spendry 
107*53845Spendry 	mp->mnt_flag |= MNT_LOCAL;
108*53845Spendry 	mp->mnt_data = (qaddr_t) fmp;
109*53845Spendry 	getnewfsid(mp, MOUNT_PORTAL);
110*53845Spendry 
111*53845Spendry 	(void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
112*53845Spendry 	bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
113*53845Spendry 	(void) copyinstr(args.pa_config, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
114*53845Spendry 		&size);
115*53845Spendry 	bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
116*53845Spendry 
117*53845Spendry #ifdef notdef
118*53845Spendry 	bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
119*53845Spendry 	bcopy("portal", mp->mnt_stat.f_mntfromname, sizeof("portal"));
120*53845Spendry #endif
121*53845Spendry 
122*53845Spendry #ifdef PORTAL_DIAGNOSTIC
123*53845Spendry 	printf("portal_mount: config %s at %s\n",
124*53845Spendry 			mp->mnt_stat.f_mntfromname, mp->mnt_stat.f_mntonname);
125*53845Spendry #endif
126*53845Spendry 	return (0);
127*53845Spendry }
128*53845Spendry 
129*53845Spendry portal_start(mp, flags, p)
130*53845Spendry 	struct mount *mp;
131*53845Spendry 	int flags;
132*53845Spendry 	struct proc *p;
133*53845Spendry {
134*53845Spendry 	return (0);
135*53845Spendry }
136*53845Spendry 
137*53845Spendry portal_unmount(mp, mntflags, p)
138*53845Spendry 	struct mount *mp;
139*53845Spendry 	int mntflags;
140*53845Spendry 	struct proc *p;
141*53845Spendry {
142*53845Spendry 	int error;
143*53845Spendry 	int flags = 0;
144*53845Spendry 	extern int doforce;
145*53845Spendry 	struct vnode *rootvp = VFSTOPORTAL(mp)->pm_root;
146*53845Spendry 
147*53845Spendry #ifdef PORTAL_DIAGNOSTIC
148*53845Spendry 	printf("portal_unmount(mp = %x)\n", mp);
149*53845Spendry #endif
150*53845Spendry 
151*53845Spendry 	if (mntflags & MNT_FORCE) {
152*53845Spendry 		/* portal can never be rootfs so don't check for it */
153*53845Spendry 		if (!doforce)
154*53845Spendry 			return (EINVAL);
155*53845Spendry 		flags |= FORCECLOSE;
156*53845Spendry 	}
157*53845Spendry 
158*53845Spendry 	/*
159*53845Spendry 	 * Clear out buffer cache.  I don't think we
160*53845Spendry 	 * ever get anything cached at this level at the
161*53845Spendry 	 * moment, but who knows...
162*53845Spendry 	 */
163*53845Spendry #ifdef PORTAL_DIAGNOSTIC
164*53845Spendry 	printf("portal_unmount: calling mntflushbuf\n");
165*53845Spendry #endif
166*53845Spendry 	mntflushbuf(mp, 0);
167*53845Spendry #ifdef PORTAL_DIAGNOSTIC
168*53845Spendry 	printf("portal_unmount: calling mntinvalbuf\n");
169*53845Spendry #endif
170*53845Spendry 	if (mntinvalbuf(mp, 1))
171*53845Spendry 		return (EBUSY);
172*53845Spendry 	if (rootvp->v_usecount > 1)
173*53845Spendry 		return (EBUSY);
174*53845Spendry #ifdef PORTAL_DIAGNOSTIC
175*53845Spendry 	printf("portal_unmount: calling vflush\n");
176*53845Spendry #endif
177*53845Spendry 	if (error = vflush(mp, rootvp, flags))
178*53845Spendry 		return (error);
179*53845Spendry 
180*53845Spendry #ifdef PORTAL_DIAGNOSTIC
181*53845Spendry 	vprint("portal root", rootvp);
182*53845Spendry #endif
183*53845Spendry 	/*
184*53845Spendry 	 * Release reference on underlying root vnode
185*53845Spendry 	 */
186*53845Spendry 	vrele(rootvp);
187*53845Spendry 	/*
188*53845Spendry 	 * And blow it away for future re-use
189*53845Spendry 	 */
190*53845Spendry 	vgone(rootvp);
191*53845Spendry 	/*
192*53845Spendry 	 * Shutdown the socket.  This will cause the select in the
193*53845Spendry 	 * daemon to wake up, and then the accept will get ECONNABORTED
194*53845Spendry 	 * which it interprets as a request to go and bury itself.
195*53845Spendry 	 */
196*53845Spendry #ifdef PORTAL_DIAGNOSTIC
197*53845Spendry 	printf("portal_unmount: shutdown socket\n");
198*53845Spendry #endif
199*53845Spendry 	soshutdown((struct socket *) VFSTOPORTAL(mp)->pm_server->f_data, 2);
200*53845Spendry 	/*
201*53845Spendry 	 * Discard reference to underlying file.  Must call closef because
202*53845Spendry 	 * this may be the last reference.
203*53845Spendry 	 */
204*53845Spendry #ifdef PORTAL_DIAGNOSTIC
205*53845Spendry 	printf("portal_unmount: closef(%x)\n", VFSTOPORTAL(mp)->pm_server);
206*53845Spendry #endif
207*53845Spendry 	closef(VFSTOPORTAL(mp)->pm_server, (struct proc *) 0);
208*53845Spendry 	/*
209*53845Spendry 	 * Finally, throw away the portalmount structure
210*53845Spendry 	 */
211*53845Spendry 	free(mp->mnt_data, M_UFSMNT);	/* XXX */
212*53845Spendry 	mp->mnt_data = 0;
213*53845Spendry 	return 0;
214*53845Spendry }
215*53845Spendry 
216*53845Spendry portal_root(mp, vpp)
217*53845Spendry 	struct mount *mp;
218*53845Spendry 	struct vnode **vpp;
219*53845Spendry {
220*53845Spendry 	USES_VOP_LOCK;
221*53845Spendry 	struct vnode *vp;
222*53845Spendry 	int error;
223*53845Spendry 
224*53845Spendry #ifdef PORTAL_DIAGNOSTIC
225*53845Spendry 	printf("portal_root(mp = %x)\n", mp);
226*53845Spendry #endif
227*53845Spendry 
228*53845Spendry 	/*
229*53845Spendry 	 * Return locked reference to root.
230*53845Spendry 	 */
231*53845Spendry 	vp = VFSTOPORTAL(mp)->pm_root;
232*53845Spendry 	VREF(vp);
233*53845Spendry 	VOP_LOCK(vp);
234*53845Spendry 	*vpp = vp;
235*53845Spendry 	return (0);
236*53845Spendry }
237*53845Spendry 
238*53845Spendry portal_quotactl(mp, cmd, uid, arg, p)
239*53845Spendry 	struct mount *mp;
240*53845Spendry 	int cmd;
241*53845Spendry 	uid_t uid;
242*53845Spendry 	caddr_t arg;
243*53845Spendry 	struct proc *p;
244*53845Spendry {
245*53845Spendry 	return (EOPNOTSUPP);
246*53845Spendry }
247*53845Spendry 
248*53845Spendry portal_statfs(mp, sbp, p)
249*53845Spendry 	struct mount *mp;
250*53845Spendry 	struct statfs *sbp;
251*53845Spendry 	struct proc *p;
252*53845Spendry {
253*53845Spendry 	struct filedesc *fdp;
254*53845Spendry 	int lim;
255*53845Spendry 	int i;
256*53845Spendry 	int last;
257*53845Spendry 	int freefd;
258*53845Spendry 
259*53845Spendry #ifdef PORTAL_DIAGNOSTIC
260*53845Spendry 	printf("portal_statfs(mp = %x)\n", mp);
261*53845Spendry #endif
262*53845Spendry 
263*53845Spendry 	sbp->f_type = MOUNT_PORTAL;
264*53845Spendry 	sbp->f_flags = 0;
265*53845Spendry 	sbp->f_bsize = DEV_BSIZE;
266*53845Spendry 	sbp->f_iosize = DEV_BSIZE;
267*53845Spendry 	sbp->f_blocks = 2;		/* 1K to keep df happy */
268*53845Spendry 	sbp->f_bfree = 0;
269*53845Spendry 	sbp->f_bavail = 0;
270*53845Spendry 	sbp->f_files = 1;		/* Allow for "." */
271*53845Spendry 	sbp->f_ffree = 0;		/* See comments above */
272*53845Spendry 	if (sbp != &mp->mnt_stat) {
273*53845Spendry 		bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
274*53845Spendry 		bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
275*53845Spendry 		bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
276*53845Spendry 	}
277*53845Spendry 	return (0);
278*53845Spendry }
279*53845Spendry 
280*53845Spendry portal_sync(mp, waitfor)
281*53845Spendry 	struct mount *mp;
282*53845Spendry 	int waitfor;
283*53845Spendry {
284*53845Spendry 	return (0);
285*53845Spendry }
286*53845Spendry 
287*53845Spendry portal_fhtovp(mp, fhp, vpp)
288*53845Spendry 	struct mount *mp;
289*53845Spendry 	struct fid *fhp;
290*53845Spendry 	struct vnode **vpp;
291*53845Spendry {
292*53845Spendry 	return (EOPNOTSUPP);
293*53845Spendry }
294*53845Spendry 
295*53845Spendry portal_vptofh(vp, fhp)
296*53845Spendry 	struct vnode *vp;
297*53845Spendry 	struct fid *fhp;
298*53845Spendry {
299*53845Spendry 	return (EOPNOTSUPP);
300*53845Spendry }
301*53845Spendry 
302*53845Spendry struct vfsops portal_vfsops = {
303*53845Spendry 	portal_mount,
304*53845Spendry 	portal_start,
305*53845Spendry 	portal_unmount,
306*53845Spendry 	portal_root,
307*53845Spendry 	portal_quotactl,
308*53845Spendry 	portal_statfs,
309*53845Spendry 	portal_sync,
310*53845Spendry 	portal_fhtovp,
311*53845Spendry 	portal_vptofh,
312*53845Spendry 	portal_init,
313*53845Spendry };
314