/* $OpenBSD: portal_vfsops.c,v 1.23 2008/11/02 11:37:32 thib 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. 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 #include #define portal_init ((int (*)(struct vfsconf *))nullop) int portal_mount(struct mount *, const char *, void *, struct nameidata *, struct proc *); int portal_start(struct mount *, int, struct proc *); int portal_unmount(struct mount *, int, struct proc *); int portal_root(struct mount *, struct vnode **); int portal_statfs(struct mount *, struct statfs *, struct proc *); /* * Mount the per-process file descriptors (/dev/fd) */ int portal_mount(struct mount *mp, const char *path, void *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, &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) { FRELE(fp); return (ESOCKTNOSUPPORT); } error = getnewvnode(VT_PORTAL, mp, portal_vnodeop_p, &rvp); /* XXX */ if (error) { FRELE(fp); return (error); } rvp->v_data = malloc(sizeof(struct portalnode), M_TEMP, M_WAITOK); fmp = (struct portalmount *) malloc(sizeof(struct portalmount), M_MISCFSMNT, M_WAITOK); 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++; FRELE(fp); mp->mnt_flag |= MNT_LOCAL; mp->mnt_data = fmp; vfs_getnewfsid(mp); mp->mnt_stat.f_namemax = MAXNAMLEN; (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(struct mount *mp, int flags, struct proc *p) { return (0); } int portal_unmount(struct mount *mp, int mntflags, struct proc *p) { struct vnode *rvp = 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 (rvp->v_usecount > 1 && !(flags & FORCECLOSE)) return (EBUSY); if ((error = vflush(mp, rvp, flags)) != 0) return (error); /* * Release reference on underlying root vnode */ vrele(rvp); /* * And blow it away for future re-use */ vgone(rvp); /* * 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. */ FREF(VFSTOPORTAL(mp)->pm_server); 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, NULL); /* * Finally, throw away the portalmount structure */ free(mp->mnt_data, M_MISCFSMNT); mp->mnt_data = 0; return (0); } int portal_root(struct mount *mp, struct vnode **vpp) { struct vnode *vp; struct proc *p = curproc; /* * 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(struct mount *mp, struct statfs *sbp, struct proc *p) { 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 */ copy_statfs_info(sbp, mp); return (0); } #define portal_sync ((int (*)(struct mount *, int, struct ucred *, \ struct proc *))nullop) #define portal_fhtovp ((int (*)(struct mount *, struct fid *, \ struct vnode **))eopnotsupp) #define portal_quotactl ((int (*)(struct mount *, int, uid_t, caddr_t, \ struct proc *))eopnotsupp) #define portal_sysctl ((int (*)(int *, u_int, void *, size_t *, void *, \ size_t, struct proc *))eopnotsupp) #define portal_vget ((int (*)(struct mount *, ino_t, struct vnode **)) \ eopnotsupp) #define portal_vptofh ((int (*)(struct vnode *, struct fid *))eopnotsupp) #define portal_checkexp ((int (*)(struct mount *, struct mbuf *, \ int *, struct ucred **))eopnotsupp) const 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, portal_checkexp };