+++ /dev/null
-/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-/* $NetBSD: umap_vfsops.c,v 1.7 1995/03/09 12:05:59 mycroft 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
- * the UCLA Ficus project.
- *
- * 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: @(#)null_vfsops.c 1.5 (Berkeley) 7/10/92
- * @(#)umap_vfsops.c 8.3 (Berkeley) 1/21/94
- */
-
-/*
- * Umap Layer
- * (See mount_umap(8) for a description of this layer.)
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/vnode.h>
-#include <sys/mount.h>
-#include <sys/namei.h>
-#include <sys/malloc.h>
-#include <miscfs/umapfs/umap.h>
-
-/*
- * Mount umap layer
- */
-int
-umapfs_mount(mp, path, data, ndp, p)
- struct mount *mp;
- char *path;
- caddr_t data;
- struct nameidata *ndp;
- struct proc *p;
-{
- struct umap_args args;
- struct vnode *lowerrootvp, *vp;
- struct vnode *umapm_rootvp;
- struct umap_mount *amp;
- size_t size;
- int error;
-
-#ifdef UMAPFS_DIAGNOSTIC
- printf("umapfs_mount(mp = %x)\n", mp);
-#endif
-
- /*
- * Update is a no-op
- */
- if (mp->mnt_flag & MNT_UPDATE) {
- return (EOPNOTSUPP);
- /* return (VFS_MOUNT(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, path, data, ndp, p));*/
- }
-
- /*
- * Get argument
- */
- if (error = copyin(data, (caddr_t)&args, sizeof(struct umap_args)))
- return (error);
-
- /*
- * Find lower node
- */
- NDINIT(ndp, LOOKUP, FOLLOW|WANTPARENT|LOCKLEAF,
- UIO_USERSPACE, args.target, p);
- if (error = namei(ndp))
- return (error);
-
- /*
- * Sanity check on lower vnode
- */
- lowerrootvp = ndp->ni_vp;
-#ifdef UMAPFS_DIAGNOSTIC
- printf("vp = %x, check for VDIR...\n", lowerrootvp);
-#endif
- vrele(ndp->ni_dvp);
- ndp->ni_dvp = 0;
-
- if (lowerrootvp->v_type != VDIR) {
- vput(lowerrootvp);
- return (EINVAL);
- }
-
-#ifdef UMAPFS_DIAGNOSTIC
- printf("mp = %x\n", mp);
-#endif
-
-// amp = (struct umap_mount *) malloc(sizeof(struct umap_mount),
-// M_UFSMNT, M_WAITOK); /* XXX */
- MALLOC(amp, struct umap_mount *, sizeof(struct umap_mount),
- M_UFSMNT, M_WAITOK);
-
- /*
- * Save reference to underlying FS
- */
- amp->umapm_vfs = lowerrootvp->v_mount;
-
- /*
- * Now copy in the number of entries and maps for umap mapping.
- */
- amp->info_nentries = args.nentries;
- amp->info_gnentries = args.gnentries;
- error = copyin(args.mapdata, (caddr_t)amp->info_mapdata,
- 2*sizeof(u_long)*args.nentries);
- if (error)
- return (error);
-
-#ifdef UMAP_DIAGNOSTIC
- printf("umap_mount:nentries %d\n",args.nentries);
- for (i = 0; i < args.nentries; i++)
- printf(" %d maps to %d\n", amp->info_mapdata[i][0],
- amp->info_mapdata[i][1]);
-#endif
-
- error = copyin(args.gmapdata, (caddr_t)amp->info_gmapdata,
- 2*sizeof(u_long)*args.nentries);
- if (error)
- return (error);
-
-#ifdef UMAP_DIAGNOSTIC
- printf("umap_mount:gnentries %d\n",args.gnentries);
- for (i = 0; i < args.gnentries; i++)
- printf(" group %d maps to %d\n",
- amp->info_gmapdata[i][0],
- amp->info_gmapdata[i][1]);
-#endif
-
-
- /*
- * Save reference. Each mount also holds
- * a reference on the root vnode.
- */
- error = umap_node_create(mp, lowerrootvp, &vp);
- /*
- * Unlock the node (either the lower or the alias)
- */
- VOP_UNLOCK(vp);
- /*
- * Make sure the node alias worked
- */
- if (error) {
- vrele(lowerrootvp);
- free(amp, M_UFSMNT); /* XXX */
- return (error);
- }
-
- /*
- * Keep a held reference to the root vnode.
- * It is vrele'd in umapfs_unmount.
- */
- umapm_rootvp = vp;
- umapm_rootvp->v_flag |= VROOT;
- amp->umapm_rootvp = umapm_rootvp;
- if (UMAPVPTOLOWERVP(umapm_rootvp)->v_mount->mnt_flag & MNT_LOCAL)
- mp->mnt_flag |= MNT_LOCAL;
- mp->mnt_data = (qaddr_t) amp;
- getnewfsid(mp, makefstype(MOUNT_LOFS));
-
- (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
- bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
- (void) copyinstr(args.target, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
- &size);
- bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
-#ifdef UMAPFS_DIAGNOSTIC
- printf("umapfs_mount: lower %s, alias at %s\n",
- mp->mnt_stat.f_mntfromname, mp->mnt_stat.f_mntonname);
-#endif
- return (0);
-}
-
-/*
- * VFS start. Nothing needed here - the start routine
- * on the underlying filesystem will have been called
- * when that filesystem was mounted.
- */
-int
-umapfs_start(mp, flags, p)
- struct mount *mp;
- int flags;
- struct proc *p;
-{
-
- return (0);
- /* return (VFS_START(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, flags, p)); */
-}
-
-/*
- * Free reference to umap layer
- */
-int
-umapfs_unmount(mp, mntflags, p)
- struct mount *mp;
- int mntflags;
- struct proc *p;
-{
- struct vnode *umapm_rootvp = MOUNTTOUMAPMOUNT(mp)->umapm_rootvp;
- int error;
- int flags = 0;
- extern int doforce;
-
-#ifdef UMAPFS_DIAGNOSTIC
- printf("umapfs_unmount(mp = %x)\n", mp);
-#endif
-
- if (mntflags & MNT_FORCE) {
- /* lofs 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 (umapm_rootvp->v_usecount > 1)
- return (EBUSY);
- if (error = vflush(mp, umapm_rootvp, flags))
- return (error);
-
-#ifdef UMAPFS_DIAGNOSTIC
- vprint("alias root of lower", umapm_rootvp);
-#endif
- /*
- * Release reference on underlying root vnode
- */
- vrele(umapm_rootvp);
- /*
- * And blow it away for future re-use
- */
- vgone(umapm_rootvp);
- /*
- * Finally, throw away the umap_mount structure
- */
- free(mp->mnt_data, M_UFSMNT); /* XXX */
- mp->mnt_data = 0;
- return (0);
-}
-
-int
-umapfs_root(mp, vpp)
- struct mount *mp;
- struct vnode **vpp;
-{
- struct vnode *vp;
-
-#ifdef UMAPFS_DIAGNOSTIC
- printf("umapfs_root(mp = %x, vp = %x->%x)\n", mp,
- MOUNTTOUMAPMOUNT(mp)->umapm_rootvp,
- UMAPVPTOLOWERVP(MOUNTTOUMAPMOUNT(mp)->umapm_rootvp)
- );
-#endif
-
- /*
- * Return locked reference to root.
- */
- vp = MOUNTTOUMAPMOUNT(mp)->umapm_rootvp;
- VREF(vp);
- VOP_LOCK(vp);
- *vpp = vp;
- return (0);
-}
-
-int
-umapfs_quotactl(mp, cmd, uid, arg, p)
- struct mount *mp;
- int cmd;
- uid_t uid;
- caddr_t arg;
- struct proc *p;
-{
-
- return (VFS_QUOTACTL(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, cmd, uid, arg, p));
-}
-
-int
-umapfs_statfs(mp, sbp, p)
- struct mount *mp;
- struct statfs *sbp;
- struct proc *p;
-{
- int error;
- struct statfs mstat;
-
-#ifdef UMAPFS_DIAGNOSTIC
- printf("umapfs_statfs(mp = %x, vp = %x->%x)\n", mp,
- MOUNTTOUMAPMOUNT(mp)->umapm_rootvp,
- UMAPVPTOLOWERVP(MOUNTTOUMAPMOUNT(mp)->umapm_rootvp)
- );
-#endif
-
- bzero(&mstat, sizeof(mstat));
-
- error = VFS_STATFS(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, &mstat, p);
- if (error)
- return (error);
-
- /* now copy across the "interesting" information and fake the rest */
- sbp->f_type = mstat.f_type;
- sbp->f_flags = mstat.f_flags;
- sbp->f_bsize = mstat.f_bsize;
- sbp->f_iosize = mstat.f_iosize;
- sbp->f_blocks = mstat.f_blocks;
- sbp->f_bfree = mstat.f_bfree;
- sbp->f_bavail = mstat.f_bavail;
- sbp->f_files = mstat.f_files;
- sbp->f_ffree = mstat.f_ffree;
- 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);
- sbp->f_fstypename[MFSNAMELEN] = '\0';
- return (0);
-}
-
-int
-umapfs_sync(mp, waitfor, cred, p)
- struct mount *mp;
- int waitfor;
- struct ucred *cred;
- struct proc *p;
-{
-
- /*
- * XXX - Assumes no data cached at umap layer.
- */
- return (0);
-}
-
-int
-umapfs_vget(mp, ino, vpp)
- struct mount *mp;
- ino_t ino;
- struct vnode **vpp;
-{
-
- return (VFS_VGET(MOUNTTOUMAPMOUNT(mp)->umapm_vfs, ino, vpp));
-}
-
-int
-umapfs_fhtovp(mp, fidp, nam, vpp, exflagsp, credanonp)
- struct mount *mp;
- struct fid *fidp;
- struct mbuf *nam;
- struct vnode **vpp;
- int *exflagsp;
- struct ucred**credanonp;
-{
-
- return (EOPNOTSUPP);
-}
-
-int
-umapfs_vptofh(vp, fhp)
- struct vnode *vp;
- struct fid *fhp;
-{
-
- return (EOPNOTSUPP);
-}
-
-int umapfs_init __P((void));
-
-struct vfsops umap_vfsops = {
- MOUNT_UMAP,
- umapfs_mount,
- umapfs_start,
- umapfs_unmount,
- umapfs_root,
- umapfs_quotactl,
- umapfs_statfs,
- umapfs_sync,
- umapfs_vget,
- umapfs_fhtovp,
- umapfs_vptofh,
- umapfs_init,
-};
projects / apple / xnu.git / blobdiff