90688fce27
'const char *', and 'void *', respectively. The second arg is taken directly from user arguments, and is const there, so must be const in the prototypes and functions. The third arg is also taken directly from user arguments. It doesn't have to be changed, but since it's cleaner to keep the type the same as the user arg's type, and I'm already making the 'const char *' change...
332 lines
8.0 KiB
C
332 lines
8.0 KiB
C
/* $NetBSD: portal_vfsops.c,v 1.15 1996/12/22 10:10:25 cgd Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software donated to Berkeley by
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* Jan-Simon Pendry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Id: portal_vfsops.c,v 1.5 1992/05/30 10:25:27 jsp Exp
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* @(#)portal_vfsops.c 8.6 (Berkeley) 1/21/94
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*/
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/*
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* Portal Filesystem
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/proc.h>
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#include <sys/filedesc.h>
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#include <sys/file.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/namei.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/protosw.h>
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#include <sys/domain.h>
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#include <sys/un.h>
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#include <miscfs/portal/portal.h>
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void portal_init __P((void));
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int portal_mount __P((struct mount *, const char *, void *,
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struct nameidata *, struct proc *));
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int portal_start __P((struct mount *, int, struct proc *));
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int portal_unmount __P((struct mount *, int, struct proc *));
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int portal_root __P((struct mount *, struct vnode **));
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int portal_quotactl __P((struct mount *, int, uid_t, caddr_t,
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struct proc *));
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int portal_statfs __P((struct mount *, struct statfs *, struct proc *));
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int portal_sync __P((struct mount *, int, struct ucred *, struct proc *));
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int portal_vget __P((struct mount *, ino_t, struct vnode **));
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int portal_fhtovp __P((struct mount *, struct fid *, struct mbuf *,
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struct vnode **, int *, struct ucred **));
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int portal_vptofh __P((struct vnode *, struct fid *));
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void
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portal_init()
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{
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}
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/*
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* Mount the per-process file descriptors (/dev/fd)
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*/
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int
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portal_mount(mp, path, data, ndp, p)
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struct mount *mp;
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const char *path;
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void *data;
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struct nameidata *ndp;
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struct proc *p;
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{
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struct file *fp;
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struct portal_args args;
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struct portalmount *fmp;
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struct socket *so;
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struct vnode *rvp;
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size_t size;
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int error;
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/*
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* Update is a no-op
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*/
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if (mp->mnt_flag & MNT_UPDATE)
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return (EOPNOTSUPP);
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error = copyin(data, (caddr_t) &args, sizeof(struct portal_args));
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if (error)
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return (error);
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if ((error = getsock(p->p_fd, args.pa_socket, &fp)) != 0)
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return (error);
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so = (struct socket *) fp->f_data;
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if (so->so_proto->pr_domain->dom_family != AF_UNIX)
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return (ESOCKTNOSUPPORT);
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error = getnewvnode(VT_PORTAL, mp, portal_vnodeop_p, &rvp); /* XXX */
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if (error)
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return (error);
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MALLOC(rvp->v_data, void *, sizeof(struct portalnode),
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M_TEMP, M_WAITOK);
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fmp = (struct portalmount *) malloc(sizeof(struct portalmount),
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M_UFSMNT, M_WAITOK); /* XXX */
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rvp->v_type = VDIR;
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rvp->v_flag |= VROOT;
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VTOPORTAL(rvp)->pt_arg = 0;
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VTOPORTAL(rvp)->pt_size = 0;
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VTOPORTAL(rvp)->pt_fileid = PORTAL_ROOTFILEID;
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fmp->pm_root = rvp;
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fmp->pm_server = fp; fp->f_count++;
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mp->mnt_flag |= MNT_LOCAL;
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mp->mnt_data = (qaddr_t)fmp;
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getnewfsid(mp, makefstype(MOUNT_PORTAL));
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(void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
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bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
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(void) copyinstr(args.pa_config, mp->mnt_stat.f_mntfromname,
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MNAMELEN - 1, &size);
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bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
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return (0);
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}
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int
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portal_start(mp, flags, p)
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struct mount *mp;
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int flags;
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struct proc *p;
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{
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return (0);
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}
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int
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portal_unmount(mp, mntflags, p)
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struct mount *mp;
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int mntflags;
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struct proc *p;
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{
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extern int doforce;
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struct vnode *rootvp = VFSTOPORTAL(mp)->pm_root;
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int error, flags = 0;
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if (mntflags & MNT_FORCE) {
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/* portal can never be rootfs so don't check for it */
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if (!doforce)
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return (EINVAL);
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flags |= FORCECLOSE;
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}
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/*
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* Clear out buffer cache. I don't think we
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* ever get anything cached at this level at the
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* moment, but who knows...
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*/
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#ifdef notyet
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mntflushbuf(mp, 0);
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if (mntinvalbuf(mp, 1))
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return (EBUSY);
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#endif
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if (rootvp->v_usecount > 1)
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return (EBUSY);
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if ((error = vflush(mp, rootvp, flags)) != 0)
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return (error);
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/*
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* Release reference on underlying root vnode
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*/
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vrele(rootvp);
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/*
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* And blow it away for future re-use
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*/
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vgone(rootvp);
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/*
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* Shutdown the socket. This will cause the select in the
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* daemon to wake up, and then the accept will get ECONNABORTED
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* which it interprets as a request to go and bury itself.
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*/
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soshutdown((struct socket *) VFSTOPORTAL(mp)->pm_server->f_data, 2);
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/*
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* Discard reference to underlying file. Must call closef because
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* this may be the last reference.
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*/
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closef(VFSTOPORTAL(mp)->pm_server, (struct proc *) 0);
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/*
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* Finally, throw away the portalmount structure
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*/
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free(mp->mnt_data, M_UFSMNT); /* XXX */
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mp->mnt_data = 0;
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return (0);
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}
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int
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portal_root(mp, vpp)
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struct mount *mp;
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struct vnode **vpp;
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{
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struct vnode *vp;
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/*
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* Return locked reference to root.
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*/
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vp = VFSTOPORTAL(mp)->pm_root;
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VREF(vp);
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VOP_LOCK(vp);
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*vpp = vp;
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return (0);
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}
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int
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portal_quotactl(mp, cmd, uid, arg, p)
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struct mount *mp;
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int cmd;
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uid_t uid;
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caddr_t arg;
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struct proc *p;
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{
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return (EOPNOTSUPP);
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}
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int
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portal_statfs(mp, sbp, p)
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struct mount *mp;
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struct statfs *sbp;
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struct proc *p;
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{
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#ifdef COMPAT_09
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sbp->f_type = 12;
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#else
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sbp->f_type = 0;
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#endif
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sbp->f_bsize = DEV_BSIZE;
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sbp->f_iosize = DEV_BSIZE;
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sbp->f_blocks = 2; /* 1K to keep df happy */
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sbp->f_bfree = 0;
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sbp->f_bavail = 0;
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sbp->f_files = 1; /* Allow for "." */
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sbp->f_ffree = 0; /* See comments above */
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if (sbp != &mp->mnt_stat) {
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bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
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bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
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bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
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}
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strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN);
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return (0);
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}
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/*ARGSUSED*/
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int
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portal_sync(mp, waitfor, uc, p)
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struct mount *mp;
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int waitfor;
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struct ucred *uc;
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struct proc *p;
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{
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return (0);
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}
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int
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portal_vget(mp, ino, vpp)
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struct mount *mp;
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ino_t ino;
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struct vnode **vpp;
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{
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return (EOPNOTSUPP);
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}
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int
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portal_fhtovp(mp, fhp, mb, vpp, what, anon)
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struct mount *mp;
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struct fid *fhp;
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struct mbuf *mb;
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struct vnode **vpp;
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int *what;
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struct ucred **anon;
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{
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return (EOPNOTSUPP);
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}
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int
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portal_vptofh(vp, fhp)
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struct vnode *vp;
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struct fid *fhp;
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{
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return (EOPNOTSUPP);
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}
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struct vfsops portal_vfsops = {
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MOUNT_PORTAL,
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portal_mount,
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portal_start,
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portal_unmount,
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portal_root,
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portal_quotactl,
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portal_statfs,
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portal_sync,
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portal_vget,
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portal_fhtovp,
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portal_vptofh,
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portal_init,
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};
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