/* * Copyright (c) 1992, 1993, 1995 * 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. * * @(#)portal_vfsops.c 8.11 (Berkeley) 5/14/95 * * $FreeBSD: src/sys/miscfs/portal/portal_vfsops.c,v 1.26.2.2 2001/07/26 20:37:16 iedowse Exp $ * $DragonFly: src/sys/vfs/portal/portal_vfsops.c,v 1.17 2005/09/17 07:43:12 dillon Exp $ */ /* * Portal Filesystem */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "portal.h" extern struct vnodeopv_entry_desc portal_vnodeop_entries[]; static MALLOC_DEFINE(M_PORTALFSMNT, "PORTAL mount", "PORTAL mount structure"); static int portal_mount (struct mount *mp, char *path, caddr_t data, struct thread *td); static int portal_unmount (struct mount *mp, int mntflags, struct thread *td); static int portal_root (struct mount *mp, struct vnode **vpp); static int portal_statfs (struct mount *mp, struct statfs *sbp, struct thread *td); /* * Mount the per-process file descriptors (/dev/fd) */ static int portal_mount(struct mount *mp, char *path, caddr_t data, struct thread *td) { struct file *fp; struct portal_args args; struct portalmount *fmp; struct socket *so; struct vnode *rvp; struct portalnode *pn; u_int 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); KKASSERT(td->td_proc); error = holdsock(td->td_proc->p_fd, args.pa_socket, &fp); if (error) return (error); so = (struct socket *) fp->f_data; if (so->so_proto->pr_domain->dom_family != AF_UNIX) { fdrop(fp, td); return (ESOCKTNOSUPPORT); } MALLOC(pn, struct portalnode *, sizeof(struct portalnode), M_TEMP, M_WAITOK); MALLOC(fmp, struct portalmount *, sizeof(struct portalmount), M_PORTALFSMNT, M_WAITOK); /* XXX */ vfs_add_vnodeops(mp, &mp->mnt_vn_norm_ops, portal_vnodeop_entries, 0); error = getnewvnode(VT_PORTAL, mp, &rvp, 0, 0); if (error) { FREE(fmp, M_PORTALFSMNT); FREE(pn, M_TEMP); fdrop(fp, td); return (error); } rvp->v_data = pn; 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; vfs_getnewfsid(mp); (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 vx_unlock(rvp); (void)portal_statfs(mp, &mp->mnt_stat, td); fdrop(fp, td); return (0); } static int portal_unmount(struct mount *mp, int mntflags, struct thread *td) { 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 /* There is 1 extra root vnode reference (pm_root). */ error = vflush(mp, 1, flags); if (error) return (error); /* * 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 thread *) 0); /* * Finally, throw away the portalmount structure */ free(mp->mnt_data, M_PORTALFSMNT); /* XXX */ mp->mnt_data = 0; return (0); } static int portal_root(struct mount *mp, struct vnode **vpp) { struct thread *td = curthread; /* XXX */ struct vnode *vp; /* * Return locked reference to root. */ vp = VFSTOPORTAL(mp)->pm_root; vref(vp); vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); *vpp = vp; return (0); } static int portal_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) { sbp->f_flags = 0; 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) { sbp->f_type = mp->mnt_vfc->vfc_typenum; bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid)); bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); } return (0); } static struct vfsops portal_vfsops = { .vfs_mount = portal_mount, .vfs_unmount = portal_unmount, .vfs_root = portal_root, .vfs_statfs = portal_statfs, .vfs_sync = vfs_stdsync }; VFS_SET(portal_vfsops, portal, VFCF_SYNTHETIC);