b3a15ddd5b
No functional change.
1920 lines
51 KiB
C
1920 lines
51 KiB
C
/* $FreeBSD$ */
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/* $NetBSD: msdosfs_vnops.c,v 1.68 1998/02/10 14:10:04 mrg Exp $ */
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/*-
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* Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
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* Copyright (C) 1994, 1995, 1997 TooLs GmbH.
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* All rights reserved.
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* Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
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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 TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Written by Paul Popelka (paulp@uts.amdahl.com)
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*
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* You can do anything you want with this software, just don't say you wrote
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* it, and don't remove this notice.
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*
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* This software is provided "as is".
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*
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* The author supplies this software to be publicly redistributed on the
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* understanding that the author is not responsible for the correct
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* functioning of this software in any circumstances and is not liable for
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* any damages caused by this software.
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*
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* October 1992
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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/bio.h>
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#include <sys/buf.h>
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#include <sys/clock.h>
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#include <sys/dirent.h>
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#include <sys/lock.h>
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#include <sys/lockf.h>
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/mutex.h>
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#include <sys/namei.h>
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#include <sys/priv.h>
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#include <sys/stat.h>
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#include <sys/unistd.h>
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#include <sys/vnode.h>
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#include <vm/vm.h>
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#include <vm/vm_extern.h>
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#include <fs/msdosfs/bpb.h>
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#include <fs/msdosfs/direntry.h>
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#include <fs/msdosfs/denode.h>
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#include <fs/msdosfs/fat.h>
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#include <fs/msdosfs/msdosfsmount.h>
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#define DOS_FILESIZE_MAX 0xffffffff
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/*
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* Prototypes for MSDOSFS vnode operations
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*/
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static vop_create_t msdosfs_create;
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static vop_mknod_t msdosfs_mknod;
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static vop_open_t msdosfs_open;
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static vop_close_t msdosfs_close;
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static vop_access_t msdosfs_access;
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static vop_getattr_t msdosfs_getattr;
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static vop_setattr_t msdosfs_setattr;
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static vop_read_t msdosfs_read;
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static vop_write_t msdosfs_write;
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static vop_fsync_t msdosfs_fsync;
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static vop_remove_t msdosfs_remove;
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static vop_link_t msdosfs_link;
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static vop_rename_t msdosfs_rename;
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static vop_mkdir_t msdosfs_mkdir;
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static vop_rmdir_t msdosfs_rmdir;
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static vop_symlink_t msdosfs_symlink;
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static vop_readdir_t msdosfs_readdir;
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static vop_bmap_t msdosfs_bmap;
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static vop_strategy_t msdosfs_strategy;
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static vop_print_t msdosfs_print;
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static vop_pathconf_t msdosfs_pathconf;
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static vop_vptofh_t msdosfs_vptofh;
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/*
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* Some general notes:
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*
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* In the ufs filesystem the inodes, superblocks, and indirect blocks are
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* read/written using the vnode for the filesystem. Blocks that represent
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* the contents of a file are read/written using the vnode for the file
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* (including directories when they are read/written as files). This
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* presents problems for the dos filesystem because data that should be in
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* an inode (if dos had them) resides in the directory itself. Since we
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* must update directory entries without the benefit of having the vnode
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* for the directory we must use the vnode for the filesystem. This means
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* that when a directory is actually read/written (via read, write, or
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* readdir, or seek) we must use the vnode for the filesystem instead of
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* the vnode for the directory as would happen in ufs. This is to insure we
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* retrieve the correct block from the buffer cache since the hash value is
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* based upon the vnode address and the desired block number.
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*/
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/*
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* Create a regular file. On entry the directory to contain the file being
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* created is locked. We must release before we return. We must also free
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* the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or
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* only if the SAVESTART bit in cn_flags is clear on success.
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*/
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static int
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msdosfs_create(struct vop_create_args *ap)
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{
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struct componentname *cnp = ap->a_cnp;
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struct denode ndirent;
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struct denode *dep;
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struct denode *pdep = VTODE(ap->a_dvp);
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struct timespec ts;
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int error;
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#ifdef MSDOSFS_DEBUG
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printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap);
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#endif
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/*
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* If this is the root directory and there is no space left we
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* can't do anything. This is because the root directory can not
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* change size.
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*/
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if (pdep->de_StartCluster == MSDOSFSROOT
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&& pdep->de_fndoffset >= pdep->de_FileSize) {
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error = ENOSPC;
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goto bad;
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}
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/*
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* Create a directory entry for the file, then call createde() to
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* have it installed. NOTE: DOS files are always executable. We
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* use the absence of the owner write bit to make the file
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* readonly.
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*/
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#ifdef DIAGNOSTIC
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if ((cnp->cn_flags & HASBUF) == 0)
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panic("msdosfs_create: no name");
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#endif
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bzero(&ndirent, sizeof(ndirent));
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error = uniqdosname(pdep, cnp, ndirent.de_Name);
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if (error)
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goto bad;
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ndirent.de_Attributes = ATTR_ARCHIVE;
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ndirent.de_LowerCase = 0;
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ndirent.de_StartCluster = 0;
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ndirent.de_FileSize = 0;
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ndirent.de_pmp = pdep->de_pmp;
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ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
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getnanotime(&ts);
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DETIMES(&ndirent, &ts, &ts, &ts);
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error = createde(&ndirent, pdep, &dep, cnp);
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if (error)
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goto bad;
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*ap->a_vpp = DETOV(dep);
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if ((cnp->cn_flags & MAKEENTRY) != 0)
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cache_enter(ap->a_dvp, *ap->a_vpp, cnp);
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return (0);
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bad:
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return (error);
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}
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static int
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msdosfs_mknod(struct vop_mknod_args *ap)
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{
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return (EINVAL);
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}
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static int
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msdosfs_open(struct vop_open_args *ap)
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{
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struct denode *dep = VTODE(ap->a_vp);
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vnode_create_vobject(ap->a_vp, dep->de_FileSize, ap->a_td);
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return 0;
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}
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static int
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msdosfs_close(struct vop_close_args *ap)
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{
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struct vnode *vp = ap->a_vp;
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struct denode *dep = VTODE(vp);
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struct timespec ts;
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VI_LOCK(vp);
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if (vp->v_usecount > 1) {
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getnanotime(&ts);
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DETIMES(dep, &ts, &ts, &ts);
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}
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VI_UNLOCK(vp);
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return 0;
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}
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static int
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msdosfs_access(struct vop_access_args *ap)
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{
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struct vnode *vp = ap->a_vp;
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struct denode *dep = VTODE(ap->a_vp);
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struct msdosfsmount *pmp = dep->de_pmp;
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mode_t file_mode;
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accmode_t accmode = ap->a_accmode;
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file_mode = S_IRWXU|S_IRWXG|S_IRWXO;
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file_mode &= (vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask);
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/*
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* Disallow writing to directories and regular files if the
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* filesystem is read-only.
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*/
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if (accmode & VWRITE) {
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switch (vp->v_type) {
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case VREG:
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case VDIR:
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if (vp->v_mount->mnt_flag & MNT_RDONLY)
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return (EROFS);
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break;
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default:
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break;
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}
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}
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return (vaccess(vp->v_type, file_mode, pmp->pm_uid, pmp->pm_gid,
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ap->a_accmode, ap->a_cred, NULL));
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}
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static int
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msdosfs_getattr(struct vop_getattr_args *ap)
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{
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struct denode *dep = VTODE(ap->a_vp);
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struct msdosfsmount *pmp = dep->de_pmp;
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struct vattr *vap = ap->a_vap;
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mode_t mode;
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struct timespec ts;
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u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
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uint64_t fileid;
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getnanotime(&ts);
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DETIMES(dep, &ts, &ts, &ts);
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vap->va_fsid = dev2udev(pmp->pm_dev);
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/*
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* The following computation of the fileid must be the same as that
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* used in msdosfs_readdir() to compute d_fileno. If not, pwd
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* doesn't work.
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*/
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if (dep->de_Attributes & ATTR_DIRECTORY) {
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fileid = (uint64_t)cntobn(pmp, dep->de_StartCluster) *
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dirsperblk;
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if (dep->de_StartCluster == MSDOSFSROOT)
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fileid = 1;
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} else {
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fileid = (uint64_t)cntobn(pmp, dep->de_dirclust) *
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dirsperblk;
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if (dep->de_dirclust == MSDOSFSROOT)
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fileid = (uint64_t)roottobn(pmp, 0) * dirsperblk;
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fileid += (uoff_t)dep->de_diroffset / sizeof(struct direntry);
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}
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if (pmp->pm_flags & MSDOSFS_LARGEFS)
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vap->va_fileid = msdosfs_fileno_map(pmp->pm_mountp, fileid);
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else
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vap->va_fileid = (long)fileid;
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mode = S_IRWXU|S_IRWXG|S_IRWXO;
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vap->va_mode = mode &
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(ap->a_vp->v_type == VDIR ? pmp->pm_dirmask : pmp->pm_mask);
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vap->va_uid = pmp->pm_uid;
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vap->va_gid = pmp->pm_gid;
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vap->va_nlink = 1;
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vap->va_rdev = NODEV;
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vap->va_size = dep->de_FileSize;
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fattime2timespec(dep->de_MDate, dep->de_MTime, 0, 0, &vap->va_mtime);
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vap->va_ctime = vap->va_mtime;
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if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) {
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fattime2timespec(dep->de_ADate, 0, 0, 0, &vap->va_atime);
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fattime2timespec(dep->de_CDate, dep->de_CTime, dep->de_CHun,
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0, &vap->va_birthtime);
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} else {
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vap->va_atime = vap->va_mtime;
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vap->va_birthtime.tv_sec = -1;
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vap->va_birthtime.tv_nsec = 0;
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}
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vap->va_flags = 0;
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if (dep->de_Attributes & ATTR_ARCHIVE)
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vap->va_flags |= UF_ARCHIVE;
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if (dep->de_Attributes & ATTR_HIDDEN)
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vap->va_flags |= UF_HIDDEN;
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if (dep->de_Attributes & ATTR_READONLY)
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vap->va_flags |= UF_READONLY;
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if (dep->de_Attributes & ATTR_SYSTEM)
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vap->va_flags |= UF_SYSTEM;
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vap->va_gen = 0;
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vap->va_blocksize = pmp->pm_bpcluster;
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vap->va_bytes =
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(dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask;
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vap->va_type = ap->a_vp->v_type;
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vap->va_filerev = dep->de_modrev;
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return (0);
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}
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static int
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msdosfs_setattr(struct vop_setattr_args *ap)
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{
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struct vnode *vp = ap->a_vp;
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struct denode *dep = VTODE(ap->a_vp);
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struct msdosfsmount *pmp = dep->de_pmp;
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struct vattr *vap = ap->a_vap;
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struct ucred *cred = ap->a_cred;
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struct thread *td = curthread;
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int error = 0;
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#ifdef MSDOSFS_DEBUG
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printf("msdosfs_setattr(): vp %p, vap %p, cred %p\n",
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ap->a_vp, vap, cred);
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#endif
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/*
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* Check for unsettable attributes.
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*/
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if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
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(vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
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(vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
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(vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
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#ifdef MSDOSFS_DEBUG
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printf("msdosfs_setattr(): returning EINVAL\n");
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printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n",
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vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid);
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printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n",
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vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen);
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printf(" va_uid %x, va_gid %x\n",
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vap->va_uid, vap->va_gid);
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#endif
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return (EINVAL);
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}
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/*
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* We don't allow setting attributes on the root directory.
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* The special case for the root directory is because before
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* FAT32, the root directory didn't have an entry for itself
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* (and was otherwise special). With FAT32, the root
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* directory is not so special, but still doesn't have an
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* entry for itself.
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*/
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if (vp->v_vflag & VV_ROOT)
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return (EINVAL);
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if (vap->va_flags != VNOVAL) {
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if (vp->v_mount->mnt_flag & MNT_RDONLY)
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return (EROFS);
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if (cred->cr_uid != pmp->pm_uid) {
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error = priv_check_cred(cred, PRIV_VFS_ADMIN, 0);
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if (error)
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return (error);
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}
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/*
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* We are very inconsistent about handling unsupported
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* attributes. We ignored the access time and the
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* read and execute bits. We were strict for the other
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* attributes.
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*/
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if (vap->va_flags & ~(UF_ARCHIVE | UF_HIDDEN | UF_READONLY |
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UF_SYSTEM))
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return EOPNOTSUPP;
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if (vap->va_flags & UF_ARCHIVE)
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dep->de_Attributes |= ATTR_ARCHIVE;
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else
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dep->de_Attributes &= ~ATTR_ARCHIVE;
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if (vap->va_flags & UF_HIDDEN)
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dep->de_Attributes |= ATTR_HIDDEN;
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else
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dep->de_Attributes &= ~ATTR_HIDDEN;
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/* We don't allow changing the readonly bit on directories. */
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if (vp->v_type != VDIR) {
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if (vap->va_flags & UF_READONLY)
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dep->de_Attributes |= ATTR_READONLY;
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else
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dep->de_Attributes &= ~ATTR_READONLY;
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}
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if (vap->va_flags & UF_SYSTEM)
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dep->de_Attributes |= ATTR_SYSTEM;
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else
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dep->de_Attributes &= ~ATTR_SYSTEM;
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dep->de_flag |= DE_MODIFIED;
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}
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if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
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uid_t uid;
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gid_t gid;
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if (vp->v_mount->mnt_flag & MNT_RDONLY)
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return (EROFS);
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uid = vap->va_uid;
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if (uid == (uid_t)VNOVAL)
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uid = pmp->pm_uid;
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gid = vap->va_gid;
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if (gid == (gid_t)VNOVAL)
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gid = pmp->pm_gid;
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if (cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid ||
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(gid != pmp->pm_gid && !groupmember(gid, cred))) {
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error = priv_check_cred(cred, PRIV_VFS_CHOWN, 0);
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if (error)
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return (error);
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}
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if (uid != pmp->pm_uid || gid != pmp->pm_gid)
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return EINVAL;
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}
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if (vap->va_size != VNOVAL) {
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switch (vp->v_type) {
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case VDIR:
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return (EISDIR);
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case VREG:
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/*
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* Truncation is only supported for regular files,
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* Disallow it if the filesystem is read-only.
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*/
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if (vp->v_mount->mnt_flag & MNT_RDONLY)
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return (EROFS);
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break;
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default:
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/*
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* According to POSIX, the result is unspecified
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* for file types other than regular files,
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* directories and shared memory objects. We
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* don't support any file types except regular
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|
* files and directories in this file system, so
|
|
* this (default) case is unreachable and can do
|
|
* anything. Keep falling through to detrunc()
|
|
* for now.
|
|
*/
|
|
break;
|
|
}
|
|
error = detrunc(dep, vap->va_size, 0, cred);
|
|
if (error)
|
|
return error;
|
|
}
|
|
if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
|
|
if (vp->v_mount->mnt_flag & MNT_RDONLY)
|
|
return (EROFS);
|
|
error = vn_utimes_perm(vp, vap, cred, td);
|
|
if (error != 0)
|
|
return (error);
|
|
if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 &&
|
|
vap->va_atime.tv_sec != VNOVAL) {
|
|
dep->de_flag &= ~DE_ACCESS;
|
|
timespec2fattime(&vap->va_atime, 0,
|
|
&dep->de_ADate, NULL, NULL);
|
|
}
|
|
if (vap->va_mtime.tv_sec != VNOVAL) {
|
|
dep->de_flag &= ~DE_UPDATE;
|
|
timespec2fattime(&vap->va_mtime, 0,
|
|
&dep->de_MDate, &dep->de_MTime, NULL);
|
|
}
|
|
/*
|
|
* We don't set the archive bit when modifying the time of
|
|
* a directory to emulate the Windows/DOS behavior.
|
|
*/
|
|
if (vp->v_type != VDIR)
|
|
dep->de_Attributes |= ATTR_ARCHIVE;
|
|
dep->de_flag |= DE_MODIFIED;
|
|
}
|
|
/*
|
|
* DOS files only have the ability to have their writability
|
|
* attribute set, so we use the owner write bit to set the readonly
|
|
* attribute.
|
|
*/
|
|
if (vap->va_mode != (mode_t)VNOVAL) {
|
|
if (vp->v_mount->mnt_flag & MNT_RDONLY)
|
|
return (EROFS);
|
|
if (cred->cr_uid != pmp->pm_uid) {
|
|
error = priv_check_cred(cred, PRIV_VFS_ADMIN, 0);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
if (vp->v_type != VDIR) {
|
|
/* We ignore the read and execute bits. */
|
|
if (vap->va_mode & VWRITE)
|
|
dep->de_Attributes &= ~ATTR_READONLY;
|
|
else
|
|
dep->de_Attributes |= ATTR_READONLY;
|
|
dep->de_Attributes |= ATTR_ARCHIVE;
|
|
dep->de_flag |= DE_MODIFIED;
|
|
}
|
|
}
|
|
return (deupdat(dep, 0));
|
|
}
|
|
|
|
static int
|
|
msdosfs_read(struct vop_read_args *ap)
|
|
{
|
|
int error = 0;
|
|
int blsize;
|
|
int isadir;
|
|
ssize_t orig_resid;
|
|
u_int n;
|
|
u_long diff;
|
|
u_long on;
|
|
daddr_t lbn;
|
|
daddr_t rablock;
|
|
int rasize;
|
|
int seqcount;
|
|
struct buf *bp;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct denode *dep = VTODE(vp);
|
|
struct msdosfsmount *pmp = dep->de_pmp;
|
|
struct uio *uio = ap->a_uio;
|
|
|
|
/*
|
|
* If they didn't ask for any data, then we are done.
|
|
*/
|
|
orig_resid = uio->uio_resid;
|
|
if (orig_resid == 0)
|
|
return (0);
|
|
|
|
/*
|
|
* The caller is supposed to ensure that
|
|
* uio->uio_offset >= 0 and uio->uio_resid >= 0.
|
|
* We don't need to check for large offsets as in ffs because
|
|
* dep->de_FileSize <= DOS_FILESIZE_MAX < OFF_MAX, so large
|
|
* offsets cannot cause overflow even in theory.
|
|
*/
|
|
|
|
seqcount = ap->a_ioflag >> IO_SEQSHIFT;
|
|
|
|
isadir = dep->de_Attributes & ATTR_DIRECTORY;
|
|
do {
|
|
if (uio->uio_offset >= dep->de_FileSize)
|
|
break;
|
|
lbn = de_cluster(pmp, uio->uio_offset);
|
|
rablock = lbn + 1;
|
|
blsize = pmp->pm_bpcluster;
|
|
on = uio->uio_offset & pmp->pm_crbomask;
|
|
/*
|
|
* If we are operating on a directory file then be sure to
|
|
* do i/o with the vnode for the filesystem instead of the
|
|
* vnode for the directory.
|
|
*/
|
|
if (isadir) {
|
|
/* convert cluster # to block # */
|
|
error = pcbmap(dep, lbn, &lbn, 0, &blsize);
|
|
if (error == E2BIG) {
|
|
error = EINVAL;
|
|
break;
|
|
} else if (error)
|
|
break;
|
|
error = bread(pmp->pm_devvp, lbn, blsize, NOCRED, &bp);
|
|
} else if (de_cn2off(pmp, rablock) >= dep->de_FileSize) {
|
|
error = bread(vp, lbn, blsize, NOCRED, &bp);
|
|
} else if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) {
|
|
error = cluster_read(vp, dep->de_FileSize, lbn, blsize,
|
|
NOCRED, on + uio->uio_resid, seqcount, 0, &bp);
|
|
} else if (seqcount > 1) {
|
|
rasize = blsize;
|
|
error = breadn(vp, lbn,
|
|
blsize, &rablock, &rasize, 1, NOCRED, &bp);
|
|
} else {
|
|
error = bread(vp, lbn, blsize, NOCRED, &bp);
|
|
}
|
|
if (error) {
|
|
brelse(bp);
|
|
break;
|
|
}
|
|
diff = pmp->pm_bpcluster - on;
|
|
n = diff > uio->uio_resid ? uio->uio_resid : diff;
|
|
diff = dep->de_FileSize - uio->uio_offset;
|
|
if (diff < n)
|
|
n = diff;
|
|
diff = blsize - bp->b_resid;
|
|
if (diff < n)
|
|
n = diff;
|
|
error = uiomove(bp->b_data + on, (int) n, uio);
|
|
brelse(bp);
|
|
} while (error == 0 && uio->uio_resid > 0 && n != 0);
|
|
if (!isadir && (error == 0 || uio->uio_resid != orig_resid) &&
|
|
(vp->v_mount->mnt_flag & (MNT_NOATIME | MNT_RDONLY)) == 0)
|
|
dep->de_flag |= DE_ACCESS;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Write data to a file or directory.
|
|
*/
|
|
static int
|
|
msdosfs_write(struct vop_write_args *ap)
|
|
{
|
|
int n;
|
|
int croffset;
|
|
ssize_t resid;
|
|
u_long osize;
|
|
int error = 0;
|
|
u_long count;
|
|
int seqcount;
|
|
daddr_t bn, lastcn;
|
|
struct buf *bp;
|
|
int ioflag = ap->a_ioflag;
|
|
struct uio *uio = ap->a_uio;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct vnode *thisvp;
|
|
struct denode *dep = VTODE(vp);
|
|
struct msdosfsmount *pmp = dep->de_pmp;
|
|
struct ucred *cred = ap->a_cred;
|
|
|
|
#ifdef MSDOSFS_DEBUG
|
|
printf("msdosfs_write(vp %p, uio %p, ioflag %x, cred %p\n",
|
|
vp, uio, ioflag, cred);
|
|
printf("msdosfs_write(): diroff %lu, dirclust %lu, startcluster %lu\n",
|
|
dep->de_diroffset, dep->de_dirclust, dep->de_StartCluster);
|
|
#endif
|
|
|
|
switch (vp->v_type) {
|
|
case VREG:
|
|
if (ioflag & IO_APPEND)
|
|
uio->uio_offset = dep->de_FileSize;
|
|
thisvp = vp;
|
|
break;
|
|
case VDIR:
|
|
return EISDIR;
|
|
default:
|
|
panic("msdosfs_write(): bad file type");
|
|
}
|
|
|
|
/*
|
|
* This is needed (unlike in ffs_write()) because we extend the
|
|
* file outside of the loop but we don't want to extend the file
|
|
* for writes of 0 bytes.
|
|
*/
|
|
if (uio->uio_resid == 0)
|
|
return (0);
|
|
|
|
/*
|
|
* The caller is supposed to ensure that
|
|
* uio->uio_offset >= 0 and uio->uio_resid >= 0.
|
|
*/
|
|
if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX)
|
|
return (EFBIG);
|
|
|
|
/*
|
|
* If they've exceeded their filesize limit, tell them about it.
|
|
*/
|
|
if (vn_rlimit_fsize(vp, uio, uio->uio_td))
|
|
return (EFBIG);
|
|
|
|
/*
|
|
* If the offset we are starting the write at is beyond the end of
|
|
* the file, then they've done a seek. Unix filesystems allow
|
|
* files with holes in them, DOS doesn't so we must fill the hole
|
|
* with zeroed blocks.
|
|
*/
|
|
if (uio->uio_offset > dep->de_FileSize) {
|
|
error = deextend(dep, uio->uio_offset, cred);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Remember some values in case the write fails.
|
|
*/
|
|
resid = uio->uio_resid;
|
|
osize = dep->de_FileSize;
|
|
|
|
/*
|
|
* If we write beyond the end of the file, extend it to its ultimate
|
|
* size ahead of the time to hopefully get a contiguous area.
|
|
*/
|
|
if (uio->uio_offset + resid > osize) {
|
|
count = de_clcount(pmp, uio->uio_offset + resid) -
|
|
de_clcount(pmp, osize);
|
|
error = extendfile(dep, count, NULL, NULL, 0);
|
|
if (error && (error != ENOSPC || (ioflag & IO_UNIT)))
|
|
goto errexit;
|
|
lastcn = dep->de_fc[FC_LASTFC].fc_frcn;
|
|
} else
|
|
lastcn = de_clcount(pmp, osize) - 1;
|
|
|
|
seqcount = ioflag >> IO_SEQSHIFT;
|
|
do {
|
|
if (de_cluster(pmp, uio->uio_offset) > lastcn) {
|
|
error = ENOSPC;
|
|
break;
|
|
}
|
|
|
|
croffset = uio->uio_offset & pmp->pm_crbomask;
|
|
n = min(uio->uio_resid, pmp->pm_bpcluster - croffset);
|
|
if (uio->uio_offset + n > dep->de_FileSize) {
|
|
dep->de_FileSize = uio->uio_offset + n;
|
|
/* The object size needs to be set before buffer is allocated */
|
|
vnode_pager_setsize(vp, dep->de_FileSize);
|
|
}
|
|
|
|
bn = de_cluster(pmp, uio->uio_offset);
|
|
if ((uio->uio_offset & pmp->pm_crbomask) == 0
|
|
&& (de_cluster(pmp, uio->uio_offset + uio->uio_resid)
|
|
> de_cluster(pmp, uio->uio_offset)
|
|
|| uio->uio_offset + uio->uio_resid >= dep->de_FileSize)) {
|
|
/*
|
|
* If either the whole cluster gets written,
|
|
* or we write the cluster from its start beyond EOF,
|
|
* then no need to read data from disk.
|
|
*/
|
|
bp = getblk(thisvp, bn, pmp->pm_bpcluster, 0, 0, 0);
|
|
vfs_bio_clrbuf(bp);
|
|
/*
|
|
* Do the bmap now, since pcbmap needs buffers
|
|
* for the fat table. (see msdosfs_strategy)
|
|
*/
|
|
if (bp->b_blkno == bp->b_lblkno) {
|
|
error = pcbmap(dep, bp->b_lblkno, &bn, 0, 0);
|
|
if (error)
|
|
bp->b_blkno = -1;
|
|
else
|
|
bp->b_blkno = bn;
|
|
}
|
|
if (bp->b_blkno == -1) {
|
|
brelse(bp);
|
|
if (!error)
|
|
error = EIO; /* XXX */
|
|
break;
|
|
}
|
|
} else {
|
|
/*
|
|
* The block we need to write into exists, so read it in.
|
|
*/
|
|
error = bread(thisvp, bn, pmp->pm_bpcluster, cred, &bp);
|
|
if (error) {
|
|
brelse(bp);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Should these vnode_pager_* functions be done on dir
|
|
* files?
|
|
*/
|
|
|
|
/*
|
|
* Copy the data from user space into the buf header.
|
|
*/
|
|
error = uiomove(bp->b_data + croffset, n, uio);
|
|
if (error) {
|
|
brelse(bp);
|
|
break;
|
|
}
|
|
|
|
/* Prepare for clustered writes in some else clauses. */
|
|
if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERW) == 0)
|
|
bp->b_flags |= B_CLUSTEROK;
|
|
|
|
/*
|
|
* If IO_SYNC, then each buffer is written synchronously.
|
|
* Otherwise, if we have a severe page deficiency then
|
|
* write the buffer asynchronously. Otherwise, if on a
|
|
* cluster boundary then write the buffer asynchronously,
|
|
* combining it with contiguous clusters if permitted and
|
|
* possible, since we don't expect more writes into this
|
|
* buffer soon. Otherwise, do a delayed write because we
|
|
* expect more writes into this buffer soon.
|
|
*/
|
|
if (ioflag & IO_SYNC)
|
|
(void)bwrite(bp);
|
|
else if (vm_page_count_severe() || buf_dirty_count_severe())
|
|
bawrite(bp);
|
|
else if (n + croffset == pmp->pm_bpcluster) {
|
|
if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERW) == 0)
|
|
cluster_write(vp, bp, dep->de_FileSize,
|
|
seqcount, 0);
|
|
else
|
|
bawrite(bp);
|
|
} else
|
|
bdwrite(bp);
|
|
dep->de_flag |= DE_UPDATE;
|
|
} while (error == 0 && uio->uio_resid > 0);
|
|
|
|
/*
|
|
* If the write failed and they want us to, truncate the file back
|
|
* to the size it was before the write was attempted.
|
|
*/
|
|
errexit:
|
|
if (error) {
|
|
if (ioflag & IO_UNIT) {
|
|
detrunc(dep, osize, ioflag & IO_SYNC, NOCRED);
|
|
uio->uio_offset -= resid - uio->uio_resid;
|
|
uio->uio_resid = resid;
|
|
} else {
|
|
detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NOCRED);
|
|
if (uio->uio_resid != resid)
|
|
error = 0;
|
|
}
|
|
} else if (ioflag & IO_SYNC)
|
|
error = deupdat(dep, 1);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Flush the blocks of a file to disk.
|
|
*/
|
|
static int
|
|
msdosfs_fsync(struct vop_fsync_args *ap)
|
|
{
|
|
struct vnode *devvp;
|
|
int allerror, error;
|
|
|
|
vop_stdfsync(ap);
|
|
|
|
/*
|
|
* If the syncing request comes from fsync(2), sync the entire
|
|
* FAT and any other metadata that happens to be on devvp. We
|
|
* need this mainly for the FAT. We write the FAT sloppily, and
|
|
* syncing it all now is the best we can easily do to get all
|
|
* directory entries associated with the file (not just the file)
|
|
* fully synced. The other metadata includes critical metadata
|
|
* for all directory entries, but only in the MNT_ASYNC case. We
|
|
* will soon sync all metadata in the file's directory entry.
|
|
* Non-critical metadata for associated directory entries only
|
|
* gets synced accidentally, as in most file systems.
|
|
*/
|
|
if (ap->a_waitfor == MNT_WAIT) {
|
|
devvp = VTODE(ap->a_vp)->de_pmp->pm_devvp;
|
|
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
|
|
allerror = VOP_FSYNC(devvp, MNT_WAIT, ap->a_td);
|
|
VOP_UNLOCK(devvp, 0);
|
|
} else
|
|
allerror = 0;
|
|
|
|
error = deupdat(VTODE(ap->a_vp), ap->a_waitfor == MNT_WAIT);
|
|
if (allerror == 0)
|
|
allerror = error;
|
|
return (allerror);
|
|
}
|
|
|
|
static int
|
|
msdosfs_remove(struct vop_remove_args *ap)
|
|
{
|
|
struct denode *dep = VTODE(ap->a_vp);
|
|
struct denode *ddep = VTODE(ap->a_dvp);
|
|
int error;
|
|
|
|
if (ap->a_vp->v_type == VDIR)
|
|
error = EPERM;
|
|
else
|
|
error = removede(ddep, dep);
|
|
#ifdef MSDOSFS_DEBUG
|
|
printf("msdosfs_remove(), dep %p, v_usecount %d\n", dep, ap->a_vp->v_usecount);
|
|
#endif
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* DOS filesystems don't know what links are.
|
|
*/
|
|
static int
|
|
msdosfs_link(struct vop_link_args *ap)
|
|
{
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
/*
|
|
* Renames on files require moving the denode to a new hash queue since the
|
|
* denode's location is used to compute which hash queue to put the file
|
|
* in. Unless it is a rename in place. For example "mv a b".
|
|
*
|
|
* What follows is the basic algorithm:
|
|
*
|
|
* if (file move) {
|
|
* if (dest file exists) {
|
|
* remove dest file
|
|
* }
|
|
* if (dest and src in same directory) {
|
|
* rewrite name in existing directory slot
|
|
* } else {
|
|
* write new entry in dest directory
|
|
* update offset and dirclust in denode
|
|
* move denode to new hash chain
|
|
* clear old directory entry
|
|
* }
|
|
* } else {
|
|
* directory move
|
|
* if (dest directory exists) {
|
|
* if (dest is not empty) {
|
|
* return ENOTEMPTY
|
|
* }
|
|
* remove dest directory
|
|
* }
|
|
* if (dest and src in same directory) {
|
|
* rewrite name in existing entry
|
|
* } else {
|
|
* be sure dest is not a child of src directory
|
|
* write entry in dest directory
|
|
* update "." and ".." in moved directory
|
|
* clear old directory entry for moved directory
|
|
* }
|
|
* }
|
|
*
|
|
* On entry:
|
|
* source's parent directory is unlocked
|
|
* source file or directory is unlocked
|
|
* destination's parent directory is locked
|
|
* destination file or directory is locked if it exists
|
|
*
|
|
* On exit:
|
|
* all denodes should be released
|
|
*/
|
|
static int
|
|
msdosfs_rename(struct vop_rename_args *ap)
|
|
{
|
|
struct vnode *tdvp = ap->a_tdvp;
|
|
struct vnode *fvp = ap->a_fvp;
|
|
struct vnode *fdvp = ap->a_fdvp;
|
|
struct vnode *tvp = ap->a_tvp;
|
|
struct componentname *tcnp = ap->a_tcnp;
|
|
struct componentname *fcnp = ap->a_fcnp;
|
|
struct denode *ip, *xp, *dp, *zp;
|
|
u_char toname[12], oldname[11];
|
|
u_long from_diroffset, to_diroffset;
|
|
u_char to_count;
|
|
int doingdirectory = 0, newparent = 0;
|
|
int error;
|
|
u_long cn, pcl;
|
|
daddr_t bn;
|
|
struct msdosfsmount *pmp;
|
|
struct direntry *dotdotp;
|
|
struct buf *bp;
|
|
|
|
pmp = VFSTOMSDOSFS(fdvp->v_mount);
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if ((tcnp->cn_flags & HASBUF) == 0 ||
|
|
(fcnp->cn_flags & HASBUF) == 0)
|
|
panic("msdosfs_rename: no name");
|
|
#endif
|
|
/*
|
|
* Check for cross-device rename.
|
|
*/
|
|
if (fvp->v_mount != tdvp->v_mount ||
|
|
(tvp && fvp->v_mount != tvp->v_mount)) {
|
|
error = EXDEV;
|
|
abortit:
|
|
if (tdvp == tvp)
|
|
vrele(tdvp);
|
|
else
|
|
vput(tdvp);
|
|
if (tvp)
|
|
vput(tvp);
|
|
vrele(fdvp);
|
|
vrele(fvp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* If source and dest are the same, do nothing.
|
|
*/
|
|
if (tvp == fvp) {
|
|
error = 0;
|
|
goto abortit;
|
|
}
|
|
|
|
error = vn_lock(fvp, LK_EXCLUSIVE);
|
|
if (error)
|
|
goto abortit;
|
|
dp = VTODE(fdvp);
|
|
ip = VTODE(fvp);
|
|
|
|
/*
|
|
* Be sure we are not renaming ".", "..", or an alias of ".". This
|
|
* leads to a crippled directory tree. It's pretty tough to do a
|
|
* "ls" or "pwd" with the "." directory entry missing, and "cd .."
|
|
* doesn't work if the ".." entry is missing.
|
|
*/
|
|
if (ip->de_Attributes & ATTR_DIRECTORY) {
|
|
/*
|
|
* Avoid ".", "..", and aliases of "." for obvious reasons.
|
|
*/
|
|
if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
|
|
dp == ip ||
|
|
(fcnp->cn_flags & ISDOTDOT) ||
|
|
(tcnp->cn_flags & ISDOTDOT) ||
|
|
(ip->de_flag & DE_RENAME)) {
|
|
VOP_UNLOCK(fvp, 0);
|
|
error = EINVAL;
|
|
goto abortit;
|
|
}
|
|
ip->de_flag |= DE_RENAME;
|
|
doingdirectory++;
|
|
}
|
|
|
|
/*
|
|
* When the target exists, both the directory
|
|
* and target vnodes are returned locked.
|
|
*/
|
|
dp = VTODE(tdvp);
|
|
xp = tvp ? VTODE(tvp) : NULL;
|
|
/*
|
|
* Remember direntry place to use for destination
|
|
*/
|
|
to_diroffset = dp->de_fndoffset;
|
|
to_count = dp->de_fndcnt;
|
|
|
|
/*
|
|
* If ".." must be changed (ie the directory gets a new
|
|
* parent) then the source directory must not be in the
|
|
* directory hierarchy above the target, as this would
|
|
* orphan everything below the source directory. Also
|
|
* the user must have write permission in the source so
|
|
* as to be able to change "..". We must repeat the call
|
|
* to namei, as the parent directory is unlocked by the
|
|
* call to doscheckpath().
|
|
*/
|
|
error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_thread);
|
|
VOP_UNLOCK(fvp, 0);
|
|
if (VTODE(fdvp)->de_StartCluster != VTODE(tdvp)->de_StartCluster)
|
|
newparent = 1;
|
|
if (doingdirectory && newparent) {
|
|
if (error) /* write access check above */
|
|
goto bad;
|
|
if (xp != NULL)
|
|
vput(tvp);
|
|
/*
|
|
* doscheckpath() vput()'s dp,
|
|
* so we have to do a relookup afterwards
|
|
*/
|
|
error = doscheckpath(ip, dp);
|
|
if (error)
|
|
goto out;
|
|
if ((tcnp->cn_flags & SAVESTART) == 0)
|
|
panic("msdosfs_rename: lost to startdir");
|
|
error = relookup(tdvp, &tvp, tcnp);
|
|
if (error)
|
|
goto out;
|
|
dp = VTODE(tdvp);
|
|
xp = tvp ? VTODE(tvp) : NULL;
|
|
}
|
|
|
|
if (xp != NULL) {
|
|
/*
|
|
* Target must be empty if a directory and have no links
|
|
* to it. Also, ensure source and target are compatible
|
|
* (both directories, or both not directories).
|
|
*/
|
|
if (xp->de_Attributes & ATTR_DIRECTORY) {
|
|
if (!dosdirempty(xp)) {
|
|
error = ENOTEMPTY;
|
|
goto bad;
|
|
}
|
|
if (!doingdirectory) {
|
|
error = ENOTDIR;
|
|
goto bad;
|
|
}
|
|
cache_purge(tdvp);
|
|
} else if (doingdirectory) {
|
|
error = EISDIR;
|
|
goto bad;
|
|
}
|
|
error = removede(dp, xp);
|
|
if (error)
|
|
goto bad;
|
|
vput(tvp);
|
|
xp = NULL;
|
|
}
|
|
|
|
/*
|
|
* Convert the filename in tcnp into a dos filename. We copy this
|
|
* into the denode and directory entry for the destination
|
|
* file/directory.
|
|
*/
|
|
error = uniqdosname(VTODE(tdvp), tcnp, toname);
|
|
if (error)
|
|
goto abortit;
|
|
|
|
/*
|
|
* Since from wasn't locked at various places above,
|
|
* have to do a relookup here.
|
|
*/
|
|
fcnp->cn_flags &= ~MODMASK;
|
|
fcnp->cn_flags |= LOCKPARENT | LOCKLEAF;
|
|
if ((fcnp->cn_flags & SAVESTART) == 0)
|
|
panic("msdosfs_rename: lost from startdir");
|
|
if (!newparent)
|
|
VOP_UNLOCK(tdvp, 0);
|
|
if (relookup(fdvp, &fvp, fcnp) == 0)
|
|
vrele(fdvp);
|
|
if (fvp == NULL) {
|
|
/*
|
|
* From name has disappeared.
|
|
*/
|
|
if (doingdirectory)
|
|
panic("rename: lost dir entry");
|
|
if (newparent)
|
|
VOP_UNLOCK(tdvp, 0);
|
|
vrele(tdvp);
|
|
vrele(ap->a_fvp);
|
|
return 0;
|
|
}
|
|
xp = VTODE(fvp);
|
|
zp = VTODE(fdvp);
|
|
from_diroffset = zp->de_fndoffset;
|
|
|
|
/*
|
|
* Ensure that the directory entry still exists and has not
|
|
* changed till now. If the source is a file the entry may
|
|
* have been unlinked or renamed. In either case there is
|
|
* no further work to be done. If the source is a directory
|
|
* then it cannot have been rmdir'ed or renamed; this is
|
|
* prohibited by the DE_RENAME flag.
|
|
*/
|
|
if (xp != ip) {
|
|
if (doingdirectory)
|
|
panic("rename: lost dir entry");
|
|
VOP_UNLOCK(fvp, 0);
|
|
if (newparent)
|
|
VOP_UNLOCK(fdvp, 0);
|
|
vrele(ap->a_fvp);
|
|
xp = NULL;
|
|
} else {
|
|
vrele(fvp);
|
|
xp = NULL;
|
|
|
|
/*
|
|
* First write a new entry in the destination
|
|
* directory and mark the entry in the source directory
|
|
* as deleted. Then move the denode to the correct hash
|
|
* chain for its new location in the filesystem. And, if
|
|
* we moved a directory, then update its .. entry to point
|
|
* to the new parent directory.
|
|
*/
|
|
bcopy(ip->de_Name, oldname, 11);
|
|
bcopy(toname, ip->de_Name, 11); /* update denode */
|
|
dp->de_fndoffset = to_diroffset;
|
|
dp->de_fndcnt = to_count;
|
|
error = createde(ip, dp, (struct denode **)0, tcnp);
|
|
if (error) {
|
|
bcopy(oldname, ip->de_Name, 11);
|
|
if (newparent)
|
|
VOP_UNLOCK(fdvp, 0);
|
|
VOP_UNLOCK(fvp, 0);
|
|
goto bad;
|
|
}
|
|
/*
|
|
* If ip is for a directory, then its name should always
|
|
* be "." since it is for the directory entry in the
|
|
* directory itself (msdosfs_lookup() always translates
|
|
* to the "." entry so as to get a unique denode, except
|
|
* for the root directory there are different
|
|
* complications). However, we just corrupted its name
|
|
* to pass the correct name to createde(). Undo this.
|
|
*/
|
|
if ((ip->de_Attributes & ATTR_DIRECTORY) != 0)
|
|
bcopy(oldname, ip->de_Name, 11);
|
|
ip->de_refcnt++;
|
|
zp->de_fndoffset = from_diroffset;
|
|
error = removede(zp, ip);
|
|
if (error) {
|
|
/* XXX should downgrade to ro here, fs is corrupt */
|
|
if (newparent)
|
|
VOP_UNLOCK(fdvp, 0);
|
|
VOP_UNLOCK(fvp, 0);
|
|
goto bad;
|
|
}
|
|
if (!doingdirectory) {
|
|
error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0,
|
|
&ip->de_dirclust, 0);
|
|
if (error) {
|
|
/* XXX should downgrade to ro here, fs is corrupt */
|
|
if (newparent)
|
|
VOP_UNLOCK(fdvp, 0);
|
|
VOP_UNLOCK(fvp, 0);
|
|
goto bad;
|
|
}
|
|
if (ip->de_dirclust == MSDOSFSROOT)
|
|
ip->de_diroffset = to_diroffset;
|
|
else
|
|
ip->de_diroffset = to_diroffset & pmp->pm_crbomask;
|
|
}
|
|
reinsert(ip);
|
|
if (newparent)
|
|
VOP_UNLOCK(fdvp, 0);
|
|
}
|
|
|
|
/*
|
|
* If we moved a directory to a new parent directory, then we must
|
|
* fixup the ".." entry in the moved directory.
|
|
*/
|
|
if (doingdirectory && newparent) {
|
|
cn = ip->de_StartCluster;
|
|
if (cn == MSDOSFSROOT) {
|
|
/* this should never happen */
|
|
panic("msdosfs_rename(): updating .. in root directory?");
|
|
} else
|
|
bn = cntobn(pmp, cn);
|
|
error = bread(pmp->pm_devvp, bn, pmp->pm_bpcluster,
|
|
NOCRED, &bp);
|
|
if (error) {
|
|
/* XXX should downgrade to ro here, fs is corrupt */
|
|
brelse(bp);
|
|
VOP_UNLOCK(fvp, 0);
|
|
goto bad;
|
|
}
|
|
dotdotp = (struct direntry *)bp->b_data + 1;
|
|
pcl = dp->de_StartCluster;
|
|
if (FAT32(pmp) && pcl == pmp->pm_rootdirblk)
|
|
pcl = MSDOSFSROOT;
|
|
putushort(dotdotp->deStartCluster, pcl);
|
|
if (FAT32(pmp))
|
|
putushort(dotdotp->deHighClust, pcl >> 16);
|
|
if (DOINGASYNC(fvp))
|
|
bdwrite(bp);
|
|
else if ((error = bwrite(bp)) != 0) {
|
|
/* XXX should downgrade to ro here, fs is corrupt */
|
|
VOP_UNLOCK(fvp, 0);
|
|
goto bad;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The msdosfs lookup is case insensitive. Several aliases may
|
|
* be inserted for a single directory entry. As a consequnce,
|
|
* name cache purge done by lookup for fvp when DELETE op for
|
|
* namei is specified, might be not enough to expunge all
|
|
* namecache entries that were installed for this direntry.
|
|
*/
|
|
cache_purge(fvp);
|
|
VOP_UNLOCK(fvp, 0);
|
|
bad:
|
|
if (xp)
|
|
vput(tvp);
|
|
vput(tdvp);
|
|
out:
|
|
ip->de_flag &= ~DE_RENAME;
|
|
vrele(fdvp);
|
|
vrele(fvp);
|
|
return (error);
|
|
|
|
}
|
|
|
|
static struct {
|
|
struct direntry dot;
|
|
struct direntry dotdot;
|
|
} dosdirtemplate = {
|
|
{ ". ", /* the . entry */
|
|
ATTR_DIRECTORY, /* file attribute */
|
|
0, /* reserved */
|
|
0, { 0, 0 }, { 0, 0 }, /* create time & date */
|
|
{ 0, 0 }, /* access date */
|
|
{ 0, 0 }, /* high bits of start cluster */
|
|
{ 210, 4 }, { 210, 4 }, /* modify time & date */
|
|
{ 0, 0 }, /* startcluster */
|
|
{ 0, 0, 0, 0 } /* filesize */
|
|
},
|
|
{ ".. ", /* the .. entry */
|
|
ATTR_DIRECTORY, /* file attribute */
|
|
0, /* reserved */
|
|
0, { 0, 0 }, { 0, 0 }, /* create time & date */
|
|
{ 0, 0 }, /* access date */
|
|
{ 0, 0 }, /* high bits of start cluster */
|
|
{ 210, 4 }, { 210, 4 }, /* modify time & date */
|
|
{ 0, 0 }, /* startcluster */
|
|
{ 0, 0, 0, 0 } /* filesize */
|
|
}
|
|
};
|
|
|
|
static int
|
|
msdosfs_mkdir(struct vop_mkdir_args *ap)
|
|
{
|
|
struct componentname *cnp = ap->a_cnp;
|
|
struct denode *dep;
|
|
struct denode *pdep = VTODE(ap->a_dvp);
|
|
struct direntry *denp;
|
|
struct msdosfsmount *pmp = pdep->de_pmp;
|
|
struct buf *bp;
|
|
u_long newcluster, pcl;
|
|
int bn;
|
|
int error;
|
|
struct denode ndirent;
|
|
struct timespec ts;
|
|
|
|
/*
|
|
* If this is the root directory and there is no space left we
|
|
* can't do anything. This is because the root directory can not
|
|
* change size.
|
|
*/
|
|
if (pdep->de_StartCluster == MSDOSFSROOT
|
|
&& pdep->de_fndoffset >= pdep->de_FileSize) {
|
|
error = ENOSPC;
|
|
goto bad2;
|
|
}
|
|
|
|
/*
|
|
* Allocate a cluster to hold the about to be created directory.
|
|
*/
|
|
error = clusteralloc(pmp, 0, 1, CLUST_EOFE, &newcluster, NULL);
|
|
if (error)
|
|
goto bad2;
|
|
|
|
bzero(&ndirent, sizeof(ndirent));
|
|
ndirent.de_pmp = pmp;
|
|
ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
|
|
getnanotime(&ts);
|
|
DETIMES(&ndirent, &ts, &ts, &ts);
|
|
|
|
/*
|
|
* Now fill the cluster with the "." and ".." entries. And write
|
|
* the cluster to disk. This way it is there for the parent
|
|
* directory to be pointing at if there were a crash.
|
|
*/
|
|
bn = cntobn(pmp, newcluster);
|
|
/* always succeeds */
|
|
bp = getblk(pmp->pm_devvp, bn, pmp->pm_bpcluster, 0, 0, 0);
|
|
bzero(bp->b_data, pmp->pm_bpcluster);
|
|
bcopy(&dosdirtemplate, bp->b_data, sizeof dosdirtemplate);
|
|
denp = (struct direntry *)bp->b_data;
|
|
putushort(denp[0].deStartCluster, newcluster);
|
|
putushort(denp[0].deCDate, ndirent.de_CDate);
|
|
putushort(denp[0].deCTime, ndirent.de_CTime);
|
|
denp[0].deCHundredth = ndirent.de_CHun;
|
|
putushort(denp[0].deADate, ndirent.de_ADate);
|
|
putushort(denp[0].deMDate, ndirent.de_MDate);
|
|
putushort(denp[0].deMTime, ndirent.de_MTime);
|
|
pcl = pdep->de_StartCluster;
|
|
/*
|
|
* Although the root directory has a non-magic starting cluster
|
|
* number for FAT32, chkdsk and fsck_msdosfs still require
|
|
* references to it in dotdot entries to be magic.
|
|
*/
|
|
if (FAT32(pmp) && pcl == pmp->pm_rootdirblk)
|
|
pcl = MSDOSFSROOT;
|
|
putushort(denp[1].deStartCluster, pcl);
|
|
putushort(denp[1].deCDate, ndirent.de_CDate);
|
|
putushort(denp[1].deCTime, ndirent.de_CTime);
|
|
denp[1].deCHundredth = ndirent.de_CHun;
|
|
putushort(denp[1].deADate, ndirent.de_ADate);
|
|
putushort(denp[1].deMDate, ndirent.de_MDate);
|
|
putushort(denp[1].deMTime, ndirent.de_MTime);
|
|
if (FAT32(pmp)) {
|
|
putushort(denp[0].deHighClust, newcluster >> 16);
|
|
putushort(denp[1].deHighClust, pcl >> 16);
|
|
}
|
|
|
|
if (DOINGASYNC(ap->a_dvp))
|
|
bdwrite(bp);
|
|
else if ((error = bwrite(bp)) != 0)
|
|
goto bad;
|
|
|
|
/*
|
|
* Now build up a directory entry pointing to the newly allocated
|
|
* cluster. This will be written to an empty slot in the parent
|
|
* directory.
|
|
*/
|
|
#ifdef DIAGNOSTIC
|
|
if ((cnp->cn_flags & HASBUF) == 0)
|
|
panic("msdosfs_mkdir: no name");
|
|
#endif
|
|
error = uniqdosname(pdep, cnp, ndirent.de_Name);
|
|
if (error)
|
|
goto bad;
|
|
|
|
ndirent.de_Attributes = ATTR_DIRECTORY;
|
|
ndirent.de_LowerCase = 0;
|
|
ndirent.de_StartCluster = newcluster;
|
|
ndirent.de_FileSize = 0;
|
|
error = createde(&ndirent, pdep, &dep, cnp);
|
|
if (error)
|
|
goto bad;
|
|
*ap->a_vpp = DETOV(dep);
|
|
return (0);
|
|
|
|
bad:
|
|
clusterfree(pmp, newcluster, NULL);
|
|
bad2:
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
msdosfs_rmdir(struct vop_rmdir_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct vnode *dvp = ap->a_dvp;
|
|
struct componentname *cnp = ap->a_cnp;
|
|
struct denode *ip, *dp;
|
|
int error;
|
|
|
|
ip = VTODE(vp);
|
|
dp = VTODE(dvp);
|
|
|
|
/*
|
|
* Verify the directory is empty (and valid).
|
|
* (Rmdir ".." won't be valid since
|
|
* ".." will contain a reference to
|
|
* the current directory and thus be
|
|
* non-empty.)
|
|
*/
|
|
error = 0;
|
|
if (!dosdirempty(ip) || ip->de_flag & DE_RENAME) {
|
|
error = ENOTEMPTY;
|
|
goto out;
|
|
}
|
|
/*
|
|
* Delete the entry from the directory. For dos filesystems this
|
|
* gets rid of the directory entry on disk, the in memory copy
|
|
* still exists but the de_refcnt is <= 0. This prevents it from
|
|
* being found by deget(). When the vput() on dep is done we give
|
|
* up access and eventually msdosfs_reclaim() will be called which
|
|
* will remove it from the denode cache.
|
|
*/
|
|
error = removede(dp, ip);
|
|
if (error)
|
|
goto out;
|
|
/*
|
|
* This is where we decrement the link count in the parent
|
|
* directory. Since dos filesystems don't do this we just purge
|
|
* the name cache.
|
|
*/
|
|
cache_purge(dvp);
|
|
/*
|
|
* Truncate the directory that is being deleted.
|
|
*/
|
|
error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred);
|
|
cache_purge(vp);
|
|
|
|
out:
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* DOS filesystems don't know what symlinks are.
|
|
*/
|
|
static int
|
|
msdosfs_symlink(struct vop_symlink_args *ap)
|
|
{
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
static int
|
|
msdosfs_readdir(struct vop_readdir_args *ap)
|
|
{
|
|
struct mbnambuf nb;
|
|
int error = 0;
|
|
int diff;
|
|
long n;
|
|
int blsize;
|
|
long on;
|
|
u_long cn;
|
|
uint64_t fileno;
|
|
u_long dirsperblk;
|
|
long bias = 0;
|
|
daddr_t bn, lbn;
|
|
struct buf *bp;
|
|
struct denode *dep = VTODE(ap->a_vp);
|
|
struct msdosfsmount *pmp = dep->de_pmp;
|
|
struct direntry *dentp;
|
|
struct dirent dirbuf;
|
|
struct uio *uio = ap->a_uio;
|
|
u_long *cookies = NULL;
|
|
int ncookies = 0;
|
|
off_t offset, off;
|
|
int chksum = -1;
|
|
|
|
#ifdef MSDOSFS_DEBUG
|
|
printf("msdosfs_readdir(): vp %p, uio %p, cred %p, eofflagp %p\n",
|
|
ap->a_vp, uio, ap->a_cred, ap->a_eofflag);
|
|
#endif
|
|
|
|
/*
|
|
* msdosfs_readdir() won't operate properly on regular files since
|
|
* it does i/o only with the filesystem vnode, and hence can
|
|
* retrieve the wrong block from the buffer cache for a plain file.
|
|
* So, fail attempts to readdir() on a plain file.
|
|
*/
|
|
if ((dep->de_Attributes & ATTR_DIRECTORY) == 0)
|
|
return (ENOTDIR);
|
|
|
|
/*
|
|
* To be safe, initialize dirbuf
|
|
*/
|
|
bzero(dirbuf.d_name, sizeof(dirbuf.d_name));
|
|
|
|
/*
|
|
* If the user buffer is smaller than the size of one dos directory
|
|
* entry or the file offset is not a multiple of the size of a
|
|
* directory entry, then we fail the read.
|
|
*/
|
|
off = offset = uio->uio_offset;
|
|
if (uio->uio_resid < sizeof(struct direntry) ||
|
|
(offset & (sizeof(struct direntry) - 1)))
|
|
return (EINVAL);
|
|
|
|
if (ap->a_ncookies) {
|
|
ncookies = uio->uio_resid / 16;
|
|
cookies = malloc(ncookies * sizeof(u_long), M_TEMP,
|
|
M_WAITOK);
|
|
*ap->a_cookies = cookies;
|
|
*ap->a_ncookies = ncookies;
|
|
}
|
|
|
|
dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
|
|
|
|
/*
|
|
* If they are reading from the root directory then, we simulate
|
|
* the . and .. entries since these don't exist in the root
|
|
* directory. We also set the offset bias to make up for having to
|
|
* simulate these entries. By this I mean that at file offset 64 we
|
|
* read the first entry in the root directory that lives on disk.
|
|
*/
|
|
if (dep->de_StartCluster == MSDOSFSROOT
|
|
|| (FAT32(pmp) && dep->de_StartCluster == pmp->pm_rootdirblk)) {
|
|
#if 0
|
|
printf("msdosfs_readdir(): going after . or .. in root dir, offset %d\n",
|
|
offset);
|
|
#endif
|
|
bias = 2 * sizeof(struct direntry);
|
|
if (offset < bias) {
|
|
for (n = (int)offset / sizeof(struct direntry);
|
|
n < 2; n++) {
|
|
if (FAT32(pmp))
|
|
fileno = (uint64_t)cntobn(pmp,
|
|
pmp->pm_rootdirblk)
|
|
* dirsperblk;
|
|
else
|
|
fileno = 1;
|
|
if (pmp->pm_flags & MSDOSFS_LARGEFS) {
|
|
dirbuf.d_fileno =
|
|
msdosfs_fileno_map(pmp->pm_mountp,
|
|
fileno);
|
|
} else {
|
|
|
|
dirbuf.d_fileno = (uint32_t)fileno;
|
|
}
|
|
dirbuf.d_type = DT_DIR;
|
|
switch (n) {
|
|
case 0:
|
|
dirbuf.d_namlen = 1;
|
|
strcpy(dirbuf.d_name, ".");
|
|
break;
|
|
case 1:
|
|
dirbuf.d_namlen = 2;
|
|
strcpy(dirbuf.d_name, "..");
|
|
break;
|
|
}
|
|
dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf);
|
|
if (uio->uio_resid < dirbuf.d_reclen)
|
|
goto out;
|
|
error = uiomove(&dirbuf, dirbuf.d_reclen, uio);
|
|
if (error)
|
|
goto out;
|
|
offset += sizeof(struct direntry);
|
|
off = offset;
|
|
if (cookies) {
|
|
*cookies++ = offset;
|
|
if (--ncookies <= 0)
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
mbnambuf_init(&nb);
|
|
off = offset;
|
|
while (uio->uio_resid > 0) {
|
|
lbn = de_cluster(pmp, offset - bias);
|
|
on = (offset - bias) & pmp->pm_crbomask;
|
|
n = min(pmp->pm_bpcluster - on, uio->uio_resid);
|
|
diff = dep->de_FileSize - (offset - bias);
|
|
if (diff <= 0)
|
|
break;
|
|
n = min(n, diff);
|
|
error = pcbmap(dep, lbn, &bn, &cn, &blsize);
|
|
if (error)
|
|
break;
|
|
error = bread(pmp->pm_devvp, bn, blsize, NOCRED, &bp);
|
|
if (error) {
|
|
brelse(bp);
|
|
return (error);
|
|
}
|
|
n = min(n, blsize - bp->b_resid);
|
|
if (n == 0) {
|
|
brelse(bp);
|
|
return (EIO);
|
|
}
|
|
|
|
/*
|
|
* Convert from dos directory entries to fs-independent
|
|
* directory entries.
|
|
*/
|
|
for (dentp = (struct direntry *)(bp->b_data + on);
|
|
(char *)dentp < bp->b_data + on + n;
|
|
dentp++, offset += sizeof(struct direntry)) {
|
|
#if 0
|
|
printf("rd: dentp %08x prev %08x crnt %08x deName %02x attr %02x\n",
|
|
dentp, prev, crnt, dentp->deName[0], dentp->deAttributes);
|
|
#endif
|
|
/*
|
|
* If this is an unused entry, we can stop.
|
|
*/
|
|
if (dentp->deName[0] == SLOT_EMPTY) {
|
|
brelse(bp);
|
|
goto out;
|
|
}
|
|
/*
|
|
* Skip deleted entries.
|
|
*/
|
|
if (dentp->deName[0] == SLOT_DELETED) {
|
|
chksum = -1;
|
|
mbnambuf_init(&nb);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Handle Win95 long directory entries
|
|
*/
|
|
if (dentp->deAttributes == ATTR_WIN95) {
|
|
if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME)
|
|
continue;
|
|
chksum = win2unixfn(&nb,
|
|
(struct winentry *)dentp, chksum, pmp);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Skip volume labels
|
|
*/
|
|
if (dentp->deAttributes & ATTR_VOLUME) {
|
|
chksum = -1;
|
|
mbnambuf_init(&nb);
|
|
continue;
|
|
}
|
|
/*
|
|
* This computation of d_fileno must match
|
|
* the computation of va_fileid in
|
|
* msdosfs_getattr.
|
|
*/
|
|
if (dentp->deAttributes & ATTR_DIRECTORY) {
|
|
fileno = getushort(dentp->deStartCluster);
|
|
if (FAT32(pmp))
|
|
fileno |= getushort(dentp->deHighClust) << 16;
|
|
/* if this is the root directory */
|
|
if (fileno == MSDOSFSROOT)
|
|
if (FAT32(pmp))
|
|
fileno = (uint64_t)cntobn(pmp,
|
|
pmp->pm_rootdirblk)
|
|
* dirsperblk;
|
|
else
|
|
fileno = 1;
|
|
else
|
|
fileno = (uint64_t)cntobn(pmp, fileno) *
|
|
dirsperblk;
|
|
dirbuf.d_type = DT_DIR;
|
|
} else {
|
|
fileno = (uoff_t)offset /
|
|
sizeof(struct direntry);
|
|
dirbuf.d_type = DT_REG;
|
|
}
|
|
if (pmp->pm_flags & MSDOSFS_LARGEFS) {
|
|
dirbuf.d_fileno =
|
|
msdosfs_fileno_map(pmp->pm_mountp, fileno);
|
|
} else
|
|
dirbuf.d_fileno = (uint32_t)fileno;
|
|
|
|
if (chksum != winChksum(dentp->deName)) {
|
|
dirbuf.d_namlen = dos2unixfn(dentp->deName,
|
|
(u_char *)dirbuf.d_name,
|
|
dentp->deLowerCase |
|
|
((pmp->pm_flags & MSDOSFSMNT_SHORTNAME) ?
|
|
(LCASE_BASE | LCASE_EXT) : 0),
|
|
pmp);
|
|
mbnambuf_init(&nb);
|
|
} else
|
|
mbnambuf_flush(&nb, &dirbuf);
|
|
chksum = -1;
|
|
dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf);
|
|
if (uio->uio_resid < dirbuf.d_reclen) {
|
|
brelse(bp);
|
|
goto out;
|
|
}
|
|
error = uiomove(&dirbuf, dirbuf.d_reclen, uio);
|
|
if (error) {
|
|
brelse(bp);
|
|
goto out;
|
|
}
|
|
if (cookies) {
|
|
*cookies++ = offset + sizeof(struct direntry);
|
|
if (--ncookies <= 0) {
|
|
brelse(bp);
|
|
goto out;
|
|
}
|
|
}
|
|
off = offset + sizeof(struct direntry);
|
|
}
|
|
brelse(bp);
|
|
}
|
|
out:
|
|
/* Subtract unused cookies */
|
|
if (ap->a_ncookies)
|
|
*ap->a_ncookies -= ncookies;
|
|
|
|
uio->uio_offset = off;
|
|
|
|
/*
|
|
* Set the eofflag (NFS uses it)
|
|
*/
|
|
if (ap->a_eofflag) {
|
|
if (dep->de_FileSize - (offset - bias) <= 0)
|
|
*ap->a_eofflag = 1;
|
|
else
|
|
*ap->a_eofflag = 0;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*-
|
|
* a_vp - pointer to the file's vnode
|
|
* a_bn - logical block number within the file (cluster number for us)
|
|
* a_bop - where to return the bufobj of the special file containing the fs
|
|
* a_bnp - where to return the "physical" block number corresponding to a_bn
|
|
* (relative to the special file; units are blocks of size DEV_BSIZE)
|
|
* a_runp - where to return the "run past" a_bn. This is the count of logical
|
|
* blocks whose physical blocks (together with a_bn's physical block)
|
|
* are contiguous.
|
|
* a_runb - where to return the "run before" a_bn.
|
|
*/
|
|
static int
|
|
msdosfs_bmap(struct vop_bmap_args *ap)
|
|
{
|
|
struct denode *dep;
|
|
struct mount *mp;
|
|
struct msdosfsmount *pmp;
|
|
struct vnode *vp;
|
|
daddr_t runbn;
|
|
u_long cn;
|
|
int bnpercn, error, maxio, maxrun, run;
|
|
|
|
vp = ap->a_vp;
|
|
dep = VTODE(vp);
|
|
pmp = dep->de_pmp;
|
|
if (ap->a_bop != NULL)
|
|
*ap->a_bop = &pmp->pm_devvp->v_bufobj;
|
|
if (ap->a_bnp == NULL)
|
|
return (0);
|
|
if (ap->a_runp != NULL)
|
|
*ap->a_runp = 0;
|
|
if (ap->a_runb != NULL)
|
|
*ap->a_runb = 0;
|
|
cn = ap->a_bn;
|
|
if (cn != ap->a_bn)
|
|
return (EFBIG);
|
|
error = pcbmap(dep, cn, ap->a_bnp, NULL, NULL);
|
|
if (error != 0 || (ap->a_runp == NULL && ap->a_runb == NULL))
|
|
return (error);
|
|
|
|
mp = vp->v_mount;
|
|
maxio = mp->mnt_iosize_max / mp->mnt_stat.f_iosize;
|
|
bnpercn = de_cn2bn(pmp, 1);
|
|
if (ap->a_runp != NULL) {
|
|
maxrun = ulmin(maxio - 1, pmp->pm_maxcluster - cn);
|
|
for (run = 1; run <= maxrun; run++) {
|
|
if (pcbmap(dep, cn + run, &runbn, NULL, NULL) != 0 ||
|
|
runbn != *ap->a_bnp + run * bnpercn)
|
|
break;
|
|
}
|
|
*ap->a_runp = run - 1;
|
|
}
|
|
if (ap->a_runb != NULL) {
|
|
maxrun = ulmin(maxio - 1, cn);
|
|
for (run = 1; run < maxrun; run++) {
|
|
if (pcbmap(dep, cn - run, &runbn, NULL, NULL) != 0 ||
|
|
runbn != *ap->a_bnp - run * bnpercn)
|
|
break;
|
|
}
|
|
*ap->a_runb = run - 1;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
msdosfs_strategy(struct vop_strategy_args *ap)
|
|
{
|
|
struct buf *bp = ap->a_bp;
|
|
struct denode *dep = VTODE(ap->a_vp);
|
|
struct bufobj *bo;
|
|
int error = 0;
|
|
daddr_t blkno;
|
|
|
|
/*
|
|
* If we don't already know the filesystem relative block number
|
|
* then get it using pcbmap(). If pcbmap() returns the block
|
|
* number as -1 then we've got a hole in the file. DOS filesystems
|
|
* don't allow files with holes, so we shouldn't ever see this.
|
|
*/
|
|
if (bp->b_blkno == bp->b_lblkno) {
|
|
error = pcbmap(dep, bp->b_lblkno, &blkno, 0, 0);
|
|
bp->b_blkno = blkno;
|
|
if (error) {
|
|
bp->b_error = error;
|
|
bp->b_ioflags |= BIO_ERROR;
|
|
bufdone(bp);
|
|
return (0);
|
|
}
|
|
if ((long)bp->b_blkno == -1)
|
|
vfs_bio_clrbuf(bp);
|
|
}
|
|
if (bp->b_blkno == -1) {
|
|
bufdone(bp);
|
|
return (0);
|
|
}
|
|
/*
|
|
* Read/write the block from/to the disk that contains the desired
|
|
* file block.
|
|
*/
|
|
bp->b_iooffset = dbtob(bp->b_blkno);
|
|
bo = dep->de_pmp->pm_bo;
|
|
BO_STRATEGY(bo, bp);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
msdosfs_print(struct vop_print_args *ap)
|
|
{
|
|
struct denode *dep = VTODE(ap->a_vp);
|
|
|
|
printf("\tstartcluster %lu, dircluster %lu, diroffset %lu, ",
|
|
dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset);
|
|
printf("on dev %s\n", devtoname(dep->de_pmp->pm_dev));
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
msdosfs_pathconf(struct vop_pathconf_args *ap)
|
|
{
|
|
struct msdosfsmount *pmp = VTODE(ap->a_vp)->de_pmp;
|
|
|
|
switch (ap->a_name) {
|
|
case _PC_LINK_MAX:
|
|
*ap->a_retval = 1;
|
|
return (0);
|
|
case _PC_NAME_MAX:
|
|
*ap->a_retval = pmp->pm_flags & MSDOSFSMNT_LONGNAME ? WIN_MAXLEN : 12;
|
|
return (0);
|
|
case _PC_PATH_MAX:
|
|
*ap->a_retval = PATH_MAX;
|
|
return (0);
|
|
case _PC_CHOWN_RESTRICTED:
|
|
*ap->a_retval = 1;
|
|
return (0);
|
|
case _PC_NO_TRUNC:
|
|
*ap->a_retval = 0;
|
|
return (0);
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
static int
|
|
msdosfs_vptofh(struct vop_vptofh_args *ap)
|
|
{
|
|
struct denode *dep;
|
|
struct defid *defhp;
|
|
|
|
dep = VTODE(ap->a_vp);
|
|
defhp = (struct defid *)ap->a_fhp;
|
|
defhp->defid_len = sizeof(struct defid);
|
|
defhp->defid_dirclust = dep->de_dirclust;
|
|
defhp->defid_dirofs = dep->de_diroffset;
|
|
/* defhp->defid_gen = dep->de_gen; */
|
|
return (0);
|
|
}
|
|
|
|
/* Global vfs data structures for msdosfs */
|
|
struct vop_vector msdosfs_vnodeops = {
|
|
.vop_default = &default_vnodeops,
|
|
|
|
.vop_access = msdosfs_access,
|
|
.vop_bmap = msdosfs_bmap,
|
|
.vop_cachedlookup = msdosfs_lookup,
|
|
.vop_open = msdosfs_open,
|
|
.vop_close = msdosfs_close,
|
|
.vop_create = msdosfs_create,
|
|
.vop_fsync = msdosfs_fsync,
|
|
.vop_getattr = msdosfs_getattr,
|
|
.vop_inactive = msdosfs_inactive,
|
|
.vop_link = msdosfs_link,
|
|
.vop_lookup = vfs_cache_lookup,
|
|
.vop_mkdir = msdosfs_mkdir,
|
|
.vop_mknod = msdosfs_mknod,
|
|
.vop_pathconf = msdosfs_pathconf,
|
|
.vop_print = msdosfs_print,
|
|
.vop_read = msdosfs_read,
|
|
.vop_readdir = msdosfs_readdir,
|
|
.vop_reclaim = msdosfs_reclaim,
|
|
.vop_remove = msdosfs_remove,
|
|
.vop_rename = msdosfs_rename,
|
|
.vop_rmdir = msdosfs_rmdir,
|
|
.vop_setattr = msdosfs_setattr,
|
|
.vop_strategy = msdosfs_strategy,
|
|
.vop_symlink = msdosfs_symlink,
|
|
.vop_write = msdosfs_write,
|
|
.vop_vptofh = msdosfs_vptofh,
|
|
};
|