2 * Copyright (c) 1992, 1993, 1995
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software donated to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
36 * @(#)portal_vfsops.c 8.11 (Berkeley) 5/14/95
38 * $FreeBSD: src/sys/miscfs/portal/portal_vfsops.c,v 1.26.2.2 2001/07/26 20:37:16 iedowse Exp $
39 * $DragonFly: src/sys/vfs/portal/portal_vfsops.c,v 1.2 2003/06/17 04:28:42 dillon Exp $
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/kernel.h>
50 #include <sys/filedesc.h>
52 #include <sys/vnode.h>
53 #include <sys/mount.h>
54 #include <sys/malloc.h>
55 #include <sys/socket.h>
56 #include <sys/socketvar.h>
57 #include <sys/protosw.h>
58 #include <sys/domain.h>
59 #include <miscfs/portal/portal.h>
61 static MALLOC_DEFINE(M_PORTALFSMNT, "PORTAL mount", "PORTAL mount structure");
63 static int portal_mount __P((struct mount *mp, char *path, caddr_t data,
64 struct nameidata *ndp, struct proc *p));
65 static int portal_unmount __P((struct mount *mp, int mntflags,
67 static int portal_root __P((struct mount *mp, struct vnode **vpp));
68 static int portal_statfs __P((struct mount *mp, struct statfs *sbp,
72 * Mount the per-process file descriptors (/dev/fd)
75 portal_mount(mp, path, data, ndp, p)
79 struct nameidata *ndp;
83 struct portal_args args;
84 struct portalmount *fmp;
87 struct portalnode *pn;
94 if (mp->mnt_flag & MNT_UPDATE)
97 error = copyin(data, (caddr_t) &args, sizeof(struct portal_args));
101 error = holdsock(p->p_fd, args.pa_socket, &fp);
104 so = (struct socket *) fp->f_data;
105 if (so->so_proto->pr_domain->dom_family != AF_UNIX) {
107 return (ESOCKTNOSUPPORT);
110 MALLOC(pn, struct portalnode *, sizeof(struct portalnode),
113 MALLOC(fmp, struct portalmount *, sizeof(struct portalmount),
114 M_PORTALFSMNT, M_WAITOK); /* XXX */
116 error = getnewvnode(VT_PORTAL, mp, portal_vnodeop_p, &rvp); /* XXX */
118 FREE(fmp, M_PORTALFSMNT);
126 rvp->v_flag |= VROOT;
127 VTOPORTAL(rvp)->pt_arg = 0;
128 VTOPORTAL(rvp)->pt_size = 0;
129 VTOPORTAL(rvp)->pt_fileid = PORTAL_ROOTFILEID;
131 fmp->pm_server = fp; fp->f_count++;
133 mp->mnt_flag |= MNT_LOCAL;
134 mp->mnt_data = (qaddr_t) fmp;
137 (void)copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
138 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
139 (void)copyinstr(args.pa_config,
140 mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
141 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
144 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
145 bcopy("portal", mp->mnt_stat.f_mntfromname, sizeof("portal"));
148 (void)portal_statfs(mp, &mp->mnt_stat, p);
154 portal_unmount(mp, mntflags, p)
159 int error, flags = 0;
162 if (mntflags & MNT_FORCE)
166 * Clear out buffer cache. I don't think we
167 * ever get anything cached at this level at the
168 * moment, but who knows...
172 if (mntinvalbuf(mp, 1))
175 /* There is 1 extra root vnode reference (pm_root). */
176 error = vflush(mp, 1, flags);
181 * Shutdown the socket. This will cause the select in the
182 * daemon to wake up, and then the accept will get ECONNABORTED
183 * which it interprets as a request to go and bury itself.
185 soshutdown((struct socket *) VFSTOPORTAL(mp)->pm_server->f_data, 2);
187 * Discard reference to underlying file. Must call closef because
188 * this may be the last reference.
190 closef(VFSTOPORTAL(mp)->pm_server, (struct proc *) 0);
192 * Finally, throw away the portalmount structure
194 free(mp->mnt_data, M_PORTALFSMNT); /* XXX */
204 struct proc *p = curproc; /* XXX */
208 * Return locked reference to root.
210 vp = VFSTOPORTAL(mp)->pm_root;
212 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
218 portal_statfs(mp, sbp, p)
225 sbp->f_bsize = DEV_BSIZE;
226 sbp->f_iosize = DEV_BSIZE;
227 sbp->f_blocks = 2; /* 1K to keep df happy */
230 sbp->f_files = 1; /* Allow for "." */
231 sbp->f_ffree = 0; /* See comments above */
232 if (sbp != &mp->mnt_stat) {
233 sbp->f_type = mp->mnt_vfc->vfc_typenum;
234 bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
235 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
236 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
241 static struct vfsops portal_vfsops = {
258 VFS_SET(portal_vfsops, portal, VFCF_SYNTHETIC);