X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/060df5ea7c632b1ac8cc8aac1fb59758165c2084..6d2010ae8f7a6078e10b361c6962983bab233e0f:/bsd/miscfs/nullfs/null_vfsops.c diff --git a/bsd/miscfs/nullfs/null_vfsops.c b/bsd/miscfs/nullfs/null_vfsops.c deleted file mode 100644 index e81c64059..000000000 --- a/bsd/miscfs/nullfs/null_vfsops.c +++ /dev/null @@ -1,382 +0,0 @@ -/* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. - * - * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ - * - * This file contains Original Code and/or Modifications of Original Code - * as defined in and that are subject to the Apple Public Source License - * Version 2.0 (the 'License'). You may not use this file except in - * compliance with the License. The rights granted to you under the License - * may not be used to create, or enable the creation or redistribution of, - * unlawful or unlicensed copies of an Apple operating system, or to - * circumvent, violate, or enable the circumvention or violation of, any - * terms of an Apple operating system software license agreement. - * - * Please obtain a copy of the License at - * http://www.opensource.apple.com/apsl/ and read it before using this file. - * - * The 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, QUIET ENJOYMENT OR NON-INFRINGEMENT. - * Please see the License for the specific language governing rights and - * limitations under the License. - * - * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ - */ -/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */ -/* - * 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. 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. - * - * @(#)null_vfsops.c 8.7 (Berkeley) 5/14/95 - * - * @(#)lofs_vfsops.c 1.2 (Berkeley) 6/18/92 - */ - -/* - * Null Layer - * (See null_vnops.c for a description of what this does.) - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -/* - * Mount null layer - */ -static int -nullfs_mount(mp, devvp, data, context) - struct mount *mp; - vnode_t devvp; - user_addr_t data; - vfs_context_t context; -{ - int error = 0; - struct user_null_args args; - struct vnode *lowerrootvp, *vp; - struct vnode *nullm_rootvp; - struct null_mount *xmp; - u_int size; - -#ifdef NULLFS_DIAGNOSTIC - printf("nullfs_mount(mp = %x)\n", mp); -#endif - - /* - * Update is a no-op - */ - if (mp->mnt_flag & MNT_UPDATE) { - return (ENOTSUP); - /* return VFS_MOUNT(MOUNTTONULLMOUNT(mp)->nullm_vfs, devvp, data, p);*/ - } - - /* - * Get argument - */ - if (vfs_context_is64bit(context)) { - error = copyin(data, (caddr_t)&args, sizeof (args)); - } - else { - struct null_args temp; - error = copyin(data, (caddr_t)&temp, sizeof (temp)); - args.target = CAST_USER_ADDR_T(temp.target); - } - if (error) - return (error); - - /* - * Find lower node - */ - NDINIT(ndp, LOOKUP, FOLLOW|WANTPARENT|LOCKLEAF, - UIO_USERSPACE, args.target, context); - if (error = namei(ndp)) - return (error); - nameidone(ndp); - /* - * Sanity check on lower vnode - */ - lowerrootvp = ndp->ni_vp; - - vnode_put(ndp->ni_dvp); - ndp->ni_dvp = NULL; - - xmp = (struct null_mount *) _MALLOC(sizeof(struct null_mount), - M_UFSMNT, M_WAITOK); /* XXX */ - - /* - * Save reference to underlying FS - */ - xmp->nullm_vfs = lowerrootvp->v_mount; - - /* - * Save reference. Each mount also holds - * a reference on the root vnode. - */ - error = null_node_create(mp, lowerrootvp, &vp); - /* - * Make sure the node alias worked - */ - if (error) { - vnode_put(lowerrootvp); - FREE(xmp, M_UFSMNT); /* XXX */ - return (error); - } - - /* - * Keep a held reference to the root vnode. - * It is vnode_put'd in nullfs_unmount. - */ - nullm_rootvp = vp; - nullm_rootvp->v_flag |= VROOT; - xmp->nullm_rootvp = nullm_rootvp; - if (NULLVPTOLOWERVP(nullm_rootvp)->v_mount->mnt_flag & MNT_LOCAL) - mp->mnt_flag |= MNT_LOCAL; - mp->mnt_data = (qaddr_t) xmp; - vfs_getnewfsid(mp); - - (void) copyinstr(args.target, mp->mnt_vfsstat.f_mntfromname, MAXPATHLEN - 1, - &size); - bzero(mp->mnt_vfsstat.f_mntfromname + size, MNAMELEN - size); -#ifdef NULLFS_DIAGNOSTIC - printf("nullfs_mount: lower %s, alias at %s\n", - mp->mnt_vfsstat.f_mntfromname, mp->mnt_vfsstat.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. - */ -static int -nullfs_start(mp, flags, context) - struct mount *mp; - int flags; - vfs_context_t context; -{ - return (0); - /* return VFS_START(MOUNTTONULLMOUNT(mp)->nullm_vfs, flags, context); */ -} - -/* - * Free reference to null layer - */ -static int -nullfs_unmount(mp, mntflags, context) - struct mount *mp; - int mntflags; - vfs_context_t context; -{ - struct vnode *nullm_rootvp = MOUNTTONULLMOUNT(mp)->nullm_rootvp; - int error; - int flags = 0; - int force = 0; - -#ifdef NULLFS_DIAGNOSTIC - printf("nullfs_unmount(mp = %x)\n", mp); -#endif - - if (mntflags & MNT_FORCE) { - flags |= FORCECLOSE; - force = 1; - } - - if ( (nullm_rootvp->v_usecount > 1) && !force ) - return (EBUSY); - if ( (error = vflush(mp, nullm_rootvp, flags)) && !force ) - return (error); - -#ifdef NULLFS_DIAGNOSTIC - vprint("alias root of lower", nullm_rootvp); -#endif - /* - * Release reference on underlying root vnode - */ - vnode_put(nullm_rootvp); - /* - * And blow it away for future re-use - */ - vnode_reclaim(nullm_rootvp); - /* - * Finally, throw away the null_mount structure - */ - FREE(mp->mnt_data, M_UFSMNT); /* XXX */ - mp->mnt_data = 0; - return 0; -} - -static int -nullfs_root(mp, vpp, context) - struct mount *mp; - struct vnode **vpp; - vfs_context_t context; -{ - struct proc *p = curproc; /* XXX */ - struct vnode *vp; - -#ifdef NULLFS_DIAGNOSTIC - printf("nullfs_root(mp = %x, vp = %x->%x)\n", mp, - MOUNTTONULLMOUNT(mp)->nullm_rootvp, - NULLVPTOLOWERVP(MOUNTTONULLMOUNT(mp)->nullm_rootvp) - ); -#endif - - /* - * Return locked reference to root. - */ - vp = MOUNTTONULLMOUNT(mp)->nullm_rootvp; - vnode_get(vp); - *vpp = vp; - return 0; -} - -static int -nullfs_quotactl(mp, cmd, uid, datap, context) - struct mount *mp; - int cmd; - uid_t uid; - caddr_t datap; - vfs_context_t context; -{ - return VFS_QUOTACTL(MOUNTTONULLMOUNT(mp)->nullm_vfs, cmd, uid, datap, context); -} - -static int -nullfs_statfs(mp, sbp, context) - struct mount *mp; - struct vfsstatfs *sbp; - vfs_context_t context; -{ - int error; - struct vfsstatfs mstat; - -#ifdef NULLFS_DIAGNOSTIC - printf("nullfs_statfs(mp = %x, vp = %x->%x)\n", mp, - MOUNTTONULLMOUNT(mp)->nullm_rootvp, - NULLVPTOLOWERVP(MOUNTTONULLMOUNT(mp)->nullm_rootvp) - ); -#endif - - bzero(&mstat, sizeof(mstat)); - - error = VFS_STATFS(MOUNTTONULLMOUNT(mp)->nullm_vfs, &mstat, context); - 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; - return (0); -} - -static int -nullfs_sync(__unused struct mount *mp, __unused int waitfor, - __unused kauth_cred_t cred, __unused vfs_context_t context) -{ - /* - * XXX - Assumes no data cached at null layer. - */ - return (0); -} - -static int -nullfs_vget(mp, ino, vpp, context) - struct mount *mp; - ino64_t ino; - struct vnode **vpp; - vfs_context_t context; -{ - - return VFS_VGET(MOUNTTONULLMOUNT(mp)->nullm_vfs, ino, vpp, context); -} - -static int -nullfs_fhtovp(mp, fhlen, fhp, vpp, context) - struct mount *mp; - int fhlen; - unsigned char *fhp; - struct vnode **vpp; - vfs_context_t context; -{ - - return VFS_FHTOVP(MOUNTTONULLMOUNT(mp)->nullm_vfs, fhlen, fhp, vpp, context); -} - -static int -nullfs_vptofh(vp, fhlenp, fhp, context) - struct vnode *vp; - int *fhlenp; - unsigned char *fhp; - vfs_context_t context; -{ - return VFS_VPTOFH(NULLVPTOLOWERVP(vp), fhlenp, fhp, context); -} - -int nullfs_init (struct vfsconf *); - -#define nullfs_sysctl (int (*) (int *, u_int, user_addr_t, size_t *, user_addr_t, size_t, proc_t))eopnotsupp - -struct vfsops null_vfsops = { - nullfs_mount, - nullfs_start, - nullfs_unmount, - nullfs_root, - nullfs_quotactl, - nullfs_statfs, - nullfs_sync, - nullfs_vget, - nullfs_fhtovp, - nullfs_vptofh, - nullfs_init, - nullfs_sysctl -};