/* * Copyright (c) 1992 The Regents of the University of California * Copyright (c) 1990, 1992 Jan-Simon Pendry * 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 1.6 1993/09/22 17:57:30 jsp Exp * * $Id: portal_vfsops.c,v 1.2 1994/04/14 04:06:04 cgd Exp $ */ /* * Portal Filesystem */ #include #include #include #include #include /*#include */ #include #include #include #include #include #include #include #include #include #include #include #include #include static u_short portal_mntid; int portal_init() { #ifdef PORTAL_DIAGNOSTIC printf("portal_init\n"); /* printed during system boot */ #endif } /* * Mount the per-process file descriptors (/dev/fd) */ portal_mount(mp, path, data, ndp, p) struct mount *mp; char *path; caddr_t data; struct nameidata *ndp; struct proc *p; { int error = 0; struct portal_args args; u_int size; struct portalmount *fmp; struct vnode *rvp; struct sockaddr_un *unp; struct file *fp; struct socket *so; char cfile[MAXPATHLEN]; #ifdef PORTAL_DIAGNOSTIC printf("portal_mount(mp = %x)\n", mp); #endif /* * 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); error = getnewvnode(VT_UFS, mp, &portal_vnodeops, &rvp); /* XXX */ if (error) return (error); 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; #ifdef PORTAL_DIAGNOSTIC printf("portal_mount: root vp = %x\n", rvp); #endif fmp->pm_root = rvp; fmp->pm_server = fp; fp->f_count++; /* mp->mnt_flag |= MNT_LOCAL; */ mp->mnt_data = (qaddr_t) fmp; getnewfsid(mp, (int)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); #ifdef notdef bzero(mp->mnt_stat.f_mntfromname, MNAMELEN); bcopy("portal", mp->mnt_stat.f_mntfromname, sizeof("portal")); #endif #ifdef PORTAL_DIAGNOSTIC printf("portal_mount: config %s at %s\n", mp->mnt_stat.f_mntfromname, mp->mnt_stat.f_mntonname); #endif return (0); } portal_start(mp, flags, p) struct mount *mp; int flags; struct proc *p; { return (0); } portal_unmount(mp, mntflags, p) struct mount *mp; int mntflags; struct proc *p; { int error; int flags = 0; extern int doforce; struct vnode *rootvp = VFSTOPORTAL(mp)->pm_root; #ifdef PORTAL_DIAGNOSTIC printf("portal_unmount(mp = %x)\n", mp); #endif 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 PORTAL_DIAGNOSTIC printf("portal_unmount: calling mntflushbuf\n"); #endif mntflushbuf(mp, 0); #ifdef PORTAL_DIAGNOSTIC printf("portal_unmount: calling mntinvalbuf\n"); #endif if (mntinvalbuf(mp, 1)) return (EBUSY); if (rootvp->v_usecount > 1) return (EBUSY); #ifdef PORTAL_DIAGNOSTIC printf("portal_unmount: calling vflush\n"); #endif if (error = vflush(mp, rootvp, flags)) return (error); #ifdef PORTAL_DIAGNOSTIC vprint("portal root", rootvp); #endif /* * 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. */ #ifdef PORTAL_DIAGNOSTIC printf("portal_unmount: shutdown socket\n"); #endif 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. */ #ifdef PORTAL_DIAGNOSTIC printf("portal_unmount: closef(%x)\n", VFSTOPORTAL(mp)->pm_server); #endif 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; } portal_root(mp, vpp) struct mount *mp; struct vnode **vpp; { struct vnode *vp; int error; #ifdef PORTAL_DIAGNOSTIC printf("portal_root(mp = %x)\n", mp); #endif /* * Return locked reference to root. */ vp = VFSTOPORTAL(mp)->pm_root; VREF(vp); VOP_LOCK(vp); *vpp = vp; return (0); } portal_quotactl(mp, cmd, uid, arg, p) struct mount *mp; int cmd; uid_t uid; caddr_t arg; struct proc *p; { return (EOPNOTSUPP); } portal_statfs(mp, sbp, p) struct mount *mp; struct statfs *sbp; struct proc *p; { struct filedesc *fdp; int lim; int i; int last; int freefd; #ifdef PORTAL_DIAGNOSTIC printf("portal_statfs(mp = %x)\n", mp); #endif #ifdef COMPAT_09 sbp->f_type = 12; #else sbp->f_type = 0; #endif sbp->f_flags = 0; sbp->f_fsize = DEV_BSIZE; sbp->f_bsize = 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[0], mp->mnt_op->vfs_name, MFSNAMELEN); sbp->f_fstypename[MFSNAMELEN] = '\0'; return (0); } portal_sync(mp, waitfor) struct mount *mp; int waitfor; { return (0); } portal_fhtovp(mp, fhp, vpp) struct mount *mp; struct fid *fhp; struct vnode **vpp; { return (EOPNOTSUPP); } 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_fhtovp, portal_vptofh, portal_init, };