/* $OpenBSD: portal_vfsops.c,v 1.2 1996/02/27 07:59:42 niklas Exp $ */ /* $NetBSD: portal_vfsops.c,v 1.14 1996/02/09 22:40:41 christos 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 * 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. * * from: Id: portal_vfsops.c,v 1.5 1992/05/30 10:25:27 jsp Exp * @(#)portal_vfsops.c 8.6 (Berkeley) 1/21/94 */ /* * Portal Filesystem */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include void portal_init __P((void)); int portal_mount __P((struct mount *, char *, caddr_t, struct nameidata *, struct proc *)); int portal_start __P((struct mount *, int, struct proc *)); int portal_unmount __P((struct mount *, int, struct proc *)); int portal_root __P((struct mount *, struct vnode **)); int portal_quotactl __P((struct mount *, int, uid_t, caddr_t, struct proc *)); int portal_statfs __P((struct mount *, struct statfs *, struct proc *)); int portal_sync __P((struct mount *, int, struct ucred *, struct proc *)); int portal_vget __P((struct mount *, ino_t, struct vnode **)); int portal_fhtovp __P((struct mount *, struct fid *, struct mbuf *, struct vnode **, int *, struct ucred **)); int portal_vptofh __P((struct vnode *, struct fid *)); void portal_init() { } /* * 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; size_t size; int error; /* * Update is a no-op */ if (mp->mnt_flag & MNT_UPDATE) return (EOPNOTSUPP); error = copyin(data, (caddr_t) &args, sizeof(struct portal_args)); if (error) return (error); if ((error = getsock(p->p_fd, args.pa_socket, &fp)) != 0) return (error); so = (struct socket *) fp->f_data; if (so->so_proto->pr_domain->dom_family != AF_UNIX) return (ESOCKTNOSUPPORT); error = getnewvnode(VT_PORTAL, mp, portal_vnodeop_p, &rvp); /* XXX */ if (error) return (error); MALLOC(rvp->v_data, void *, sizeof(struct portalnode), M_TEMP, M_WAITOK); fmp = (struct portalmount *) malloc(sizeof(struct portalmount), M_UFSMNT, M_WAITOK); /* XXX */ 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; fp->f_count++; mp->mnt_flag |= MNT_LOCAL; mp->mnt_data = (qaddr_t)fmp; getnewfsid(mp, makefstype(MOUNT_PORTAL)); (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); 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; { extern int doforce; struct vnode *rootvp = VFSTOPORTAL(mp)->pm_root; int error, flags = 0; if (mntflags & MNT_FORCE) { /* portal 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 (rootvp->v_usecount > 1) return (EBUSY); if ((error = vflush(mp, rootvp, flags)) != 0) 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. */ soshutdown((struct socket *) VFSTOPORTAL(mp)->pm_server->f_data, 2); /* * 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 vnode *vp; /* * Return locked reference to root. */ vp = VFSTOPORTAL(mp)->pm_root; VREF(vp); VOP_LOCK(vp); *vpp = vp; return (0); } int portal_quotactl(mp, cmd, uid, arg, p) struct mount *mp; int cmd; uid_t uid; caddr_t arg; struct proc *p; { return (EOPNOTSUPP); } int portal_statfs(mp, sbp, p) struct mount *mp; struct statfs *sbp; struct proc *p; { #ifdef COMPAT_09 sbp->f_type = 12; #else sbp->f_type = 0; #endif 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) { 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); return (0); } /*ARGSUSED*/ int portal_sync(mp, waitfor, uc, p) struct mount *mp; int waitfor; struct ucred *uc; struct proc *p; { return (0); } int portal_vget(mp, ino, vpp) struct mount *mp; ino_t ino; struct vnode **vpp; { return (EOPNOTSUPP); } int portal_fhtovp(mp, fhp, mb, vpp, what, anon) struct mount *mp; struct fid *fhp; struct mbuf *mb; struct vnode **vpp; int *what; struct ucred **anon; { return (EOPNOTSUPP); } int portal_vptofh(vp, fhp) struct vnode *vp; struct fid *fhp; { return (EOPNOTSUPP); } struct vfsops portal_vfsops = { MOUNT_PORTAL, portal_mount, portal_start, portal_unmount, portal_root, portal_quotactl, portal_statfs, portal_sync, portal_vget, portal_fhtovp, portal_vptofh, portal_init, };