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-rw-r--r--sys/msdosfs/msdosfs_vnops.c1905
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diff --git a/sys/msdosfs/msdosfs_vnops.c b/sys/msdosfs/msdosfs_vnops.c
deleted file mode 100644
index b942d30a8b9bf..0000000000000
--- a/sys/msdosfs/msdosfs_vnops.c
+++ /dev/null
@@ -1,1905 +0,0 @@
-/* $FreeBSD$ */
-/* $NetBSD: msdosfs_vnops.c,v 1.68 1998/02/10 14:10:04 mrg Exp $ */
-
-/*-
- * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
- * Copyright (C) 1994, 1995, 1997 TooLs GmbH.
- * All rights reserved.
- * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
- *
- * 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 TooLs GmbH.
- * 4. The name of TooLs GmbH may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
- */
-/*
- * Written by Paul Popelka (paulp@uts.amdahl.com)
- *
- * You can do anything you want with this software, just don't say you wrote
- * it, and don't remove this notice.
- *
- * This software is provided "as is".
- *
- * The author supplies this software to be publicly redistributed on the
- * understanding that the author is not responsible for the correct
- * functioning of this software in any circumstances and is not liable for
- * any damages caused by this software.
- *
- * October 1992
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/namei.h>
-#include <sys/resourcevar.h> /* defines plimit structure in proc struct */
-#include <sys/kernel.h>
-#include <sys/stat.h>
-#include <sys/bio.h>
-#include <sys/buf.h>
-#include <sys/proc.h>
-#include <sys/mount.h>
-#include <sys/unistd.h>
-#include <sys/vnode.h>
-#include <sys/malloc.h>
-#include <sys/dirent.h>
-#include <sys/signalvar.h>
-
-#include <vm/vm.h>
-#include <vm/vm_extern.h>
-#include <vm/vnode_pager.h>
-
-#include <machine/mutex.h>
-
-#include <msdosfs/bpb.h>
-#include <msdosfs/direntry.h>
-#include <msdosfs/denode.h>
-#include <msdosfs/msdosfsmount.h>
-#include <msdosfs/fat.h>
-
-#define DOS_FILESIZE_MAX 0xffffffff
-
-/*
- * Prototypes for MSDOSFS vnode operations
- */
-static int msdosfs_create __P((struct vop_create_args *));
-static int msdosfs_mknod __P((struct vop_mknod_args *));
-static int msdosfs_close __P((struct vop_close_args *));
-static int msdosfs_access __P((struct vop_access_args *));
-static int msdosfs_getattr __P((struct vop_getattr_args *));
-static int msdosfs_setattr __P((struct vop_setattr_args *));
-static int msdosfs_read __P((struct vop_read_args *));
-static int msdosfs_write __P((struct vop_write_args *));
-static int msdosfs_fsync __P((struct vop_fsync_args *));
-static int msdosfs_remove __P((struct vop_remove_args *));
-static int msdosfs_link __P((struct vop_link_args *));
-static int msdosfs_rename __P((struct vop_rename_args *));
-static int msdosfs_mkdir __P((struct vop_mkdir_args *));
-static int msdosfs_rmdir __P((struct vop_rmdir_args *));
-static int msdosfs_symlink __P((struct vop_symlink_args *));
-static int msdosfs_readdir __P((struct vop_readdir_args *));
-static int msdosfs_bmap __P((struct vop_bmap_args *));
-static int msdosfs_strategy __P((struct vop_strategy_args *));
-static int msdosfs_print __P((struct vop_print_args *));
-static int msdosfs_pathconf __P((struct vop_pathconf_args *ap));
-
-/*
- * Some general notes:
- *
- * In the ufs filesystem the inodes, superblocks, and indirect blocks are
- * read/written using the vnode for the filesystem. Blocks that represent
- * the contents of a file are read/written using the vnode for the file
- * (including directories when they are read/written as files). This
- * presents problems for the dos filesystem because data that should be in
- * an inode (if dos had them) resides in the directory itself. Since we
- * must update directory entries without the benefit of having the vnode
- * for the directory we must use the vnode for the filesystem. This means
- * that when a directory is actually read/written (via read, write, or
- * readdir, or seek) we must use the vnode for the filesystem instead of
- * the vnode for the directory as would happen in ufs. This is to insure we
- * retreive the correct block from the buffer cache since the hash value is
- * based upon the vnode address and the desired block number.
- */
-
-/*
- * Create a regular file. On entry the directory to contain the file being
- * created is locked. We must release before we return. We must also free
- * the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or
- * only if the SAVESTART bit in cn_flags is clear on success.
- */
-static int
-msdosfs_create(ap)
- struct vop_create_args /* {
- struct vnode *a_dvp;
- struct vnode **a_vpp;
- struct componentname *a_cnp;
- struct vattr *a_vap;
- } */ *ap;
-{
- struct componentname *cnp = ap->a_cnp;
- struct denode ndirent;
- struct denode *dep;
- struct denode *pdep = VTODE(ap->a_dvp);
- struct timespec ts;
- int error;
-
-#ifdef MSDOSFS_DEBUG
- printf("msdosfs_create(cnp %p, vap %p\n", cnp, ap->a_vap);
-#endif
-
- /*
- * 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 bad;
- }
-
- /*
- * Create a directory entry for the file, then call createde() to
- * have it installed. NOTE: DOS files are always executable. We
- * use the absence of the owner write bit to make the file
- * readonly.
- */
-#ifdef DIAGNOSTIC
- if ((cnp->cn_flags & HASBUF) == 0)
- panic("msdosfs_create: no name");
-#endif
- bzero(&ndirent, sizeof(ndirent));
- error = uniqdosname(pdep, cnp, ndirent.de_Name);
- if (error)
- goto bad;
-
- ndirent.de_Attributes = (ap->a_vap->va_mode & VWRITE) ?
- ATTR_ARCHIVE : ATTR_ARCHIVE | ATTR_READONLY;
- ndirent.de_LowerCase = 0;
- ndirent.de_StartCluster = 0;
- ndirent.de_FileSize = 0;
- ndirent.de_dev = pdep->de_dev;
- ndirent.de_devvp = pdep->de_devvp;
- ndirent.de_pmp = pdep->de_pmp;
- ndirent.de_flag = DE_ACCESS | DE_CREATE | DE_UPDATE;
- getnanotime(&ts);
- DETIMES(&ndirent, &ts, &ts, &ts);
- error = createde(&ndirent, pdep, &dep, cnp);
- if (error)
- goto bad;
- *ap->a_vpp = DETOV(dep);
- return (0);
-
-bad:
- return (error);
-}
-
-static int
-msdosfs_mknod(ap)
- struct vop_mknod_args /* {
- struct vnode *a_dvp;
- struct vnode **a_vpp;
- struct componentname *a_cnp;
- struct vattr *a_vap;
- } */ *ap;
-{
-
- switch (ap->a_vap->va_type) {
- case VDIR:
- return (msdosfs_mkdir((struct vop_mkdir_args *)ap));
- break;
-
- case VREG:
- return (msdosfs_create((struct vop_create_args *)ap));
- break;
-
- default:
- return (EINVAL);
- }
- /* NOTREACHED */
-}
-
-static int
-msdosfs_close(ap)
- struct vop_close_args /* {
- struct vnode *a_vp;
- int a_fflag;
- struct ucred *a_cred;
- struct proc *a_p;
- } */ *ap;
-{
- struct vnode *vp = ap->a_vp;
- struct denode *dep = VTODE(vp);
- struct timespec ts;
-
- mtx_lock(&vp->v_interlock);
- if (vp->v_usecount > 1) {
- getnanotime(&ts);
- DETIMES(dep, &ts, &ts, &ts);
- }
- mtx_unlock(&vp->v_interlock);
- return 0;
-}
-
-static int
-msdosfs_access(ap)
- struct vop_access_args /* {
- struct vnode *a_vp;
- int a_mode;
- struct ucred *a_cred;
- struct proc *a_p;
- } */ *ap;
-{
- struct vnode *vp = ap->a_vp;
- struct denode *dep = VTODE(ap->a_vp);
- struct msdosfsmount *pmp = dep->de_pmp;
- mode_t file_mode, mode = ap->a_mode;
-
- file_mode = (S_IXUSR|S_IXGRP|S_IXOTH) | (S_IRUSR|S_IRGRP|S_IROTH) |
- ((dep->de_Attributes & ATTR_READONLY) ? 0 : (S_IWUSR|S_IWGRP|S_IWOTH));
- file_mode &= pmp->pm_mask;
-
- /*
- * Disallow write attempts on read-only file systems;
- * unless the file is a socket, fifo, or a block or
- * character device resident on the file system.
- */
- if (mode & VWRITE) {
- switch (vp->v_type) {
- case VDIR:
- case VLNK:
- case VREG:
- if (vp->v_mount->mnt_flag & MNT_RDONLY)
- return (EROFS);
- break;
- default:
- break;
- }
- }
-
- return (vaccess(vp->v_type, file_mode, pmp->pm_uid, pmp->pm_gid,
- ap->a_mode, ap->a_cred, NULL));
-}
-
-static int
-msdosfs_getattr(ap)
- struct vop_getattr_args /* {
- struct vnode *a_vp;
- struct vattr *a_vap;
- struct ucred *a_cred;
- struct proc *a_p;
- } */ *ap;
-{
- struct denode *dep = VTODE(ap->a_vp);
- struct msdosfsmount *pmp = dep->de_pmp;
- struct vattr *vap = ap->a_vap;
- mode_t mode;
- struct timespec ts;
- u_long dirsperblk = pmp->pm_BytesPerSec / sizeof(struct direntry);
- u_long fileid;
-
- getnanotime(&ts);
- DETIMES(dep, &ts, &ts, &ts);
- vap->va_fsid = dev2udev(dep->de_dev);
- /*
- * The following computation of the fileid must be the same as that
- * used in msdosfs_readdir() to compute d_fileno. If not, pwd
- * doesn't work.
- */
- if (dep->de_Attributes & ATTR_DIRECTORY) {
- fileid = cntobn(pmp, dep->de_StartCluster) * dirsperblk;
- if (dep->de_StartCluster == MSDOSFSROOT)
- fileid = 1;
- } else {
- fileid = cntobn(pmp, dep->de_dirclust) * dirsperblk;
- if (dep->de_dirclust == MSDOSFSROOT)
- fileid = roottobn(pmp, 0) * dirsperblk;
- fileid += dep->de_diroffset / sizeof(struct direntry);
- }
- vap->va_fileid = fileid;
- if ((dep->de_Attributes & ATTR_READONLY) == 0)
- mode = S_IRWXU|S_IRWXG|S_IRWXO;
- else
- mode = S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH;
- vap->va_mode = mode & pmp->pm_mask;
- vap->va_uid = pmp->pm_uid;
- vap->va_gid = pmp->pm_gid;
- vap->va_nlink = 1;
- vap->va_rdev = 0;
- vap->va_size = dep->de_FileSize;
- dos2unixtime(dep->de_MDate, dep->de_MTime, 0, &vap->va_mtime);
- if (pmp->pm_flags & MSDOSFSMNT_LONGNAME) {
- dos2unixtime(dep->de_ADate, 0, 0, &vap->va_atime);
- dos2unixtime(dep->de_CDate, dep->de_CTime, dep->de_CHun, &vap->va_ctime);
- } else {
- vap->va_atime = vap->va_mtime;
- vap->va_ctime = vap->va_mtime;
- }
- vap->va_flags = 0;
- if ((dep->de_Attributes & ATTR_ARCHIVE) == 0)
- vap->va_flags |= SF_ARCHIVED;
- vap->va_gen = 0;
- vap->va_blocksize = pmp->pm_bpcluster;
- vap->va_bytes =
- (dep->de_FileSize + pmp->pm_crbomask) & ~pmp->pm_crbomask;
- vap->va_type = ap->a_vp->v_type;
- vap->va_filerev = dep->de_modrev;
- return (0);
-}
-
-static int
-msdosfs_setattr(ap)
- struct vop_setattr_args /* {
- struct vnode *a_vp;
- struct vattr *a_vap;
- struct ucred *a_cred;
- struct proc *a_p;
- } */ *ap;
-{
- struct vnode *vp = ap->a_vp;
- struct denode *dep = VTODE(ap->a_vp);
- struct msdosfsmount *pmp = dep->de_pmp;
- struct vattr *vap = ap->a_vap;
- struct ucred *cred = ap->a_cred;
- int error = 0;
-
-#ifdef MSDOSFS_DEBUG
- printf("msdosfs_setattr(): vp %p, vap %p, cred %p, p %p\n",
- ap->a_vp, vap, cred, ap->a_p);
-#endif
-
- /*
- * Check for unsettable attributes.
- */
- if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
- (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
- (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
- (vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
-#ifdef MSDOSFS_DEBUG
- printf("msdosfs_setattr(): returning EINVAL\n");
- printf(" va_type %d, va_nlink %x, va_fsid %lx, va_fileid %lx\n",
- vap->va_type, vap->va_nlink, vap->va_fsid, vap->va_fileid);
- printf(" va_blocksize %lx, va_rdev %x, va_bytes %qx, va_gen %lx\n",
- vap->va_blocksize, vap->va_rdev, vap->va_bytes, vap->va_gen);
- printf(" va_uid %x, va_gid %x\n",
- vap->va_uid, vap->va_gid);
-#endif
- return (EINVAL);
- }
- if (vap->va_flags != VNOVAL) {
- if (vp->v_mount->mnt_flag & MNT_RDONLY)
- return (EROFS);
- if (cred->cr_uid != pmp->pm_uid &&
- (error = suser_xxx(cred, ap->a_p, PRISON_ROOT)))
- return (error);
- /*
- * We are very inconsistent about handling unsupported
- * attributes. We ignored the access time and the
- * read and execute bits. We were strict for the other
- * attributes.
- *
- * Here we are strict, stricter than ufs in not allowing
- * users to attempt to set SF_SETTABLE bits or anyone to
- * set unsupported bits. However, we ignore attempts to
- * set ATTR_ARCHIVE for directories `cp -pr' from a more
- * sensible file system attempts it a lot.
- */
- if (cred->cr_uid != 0) {
- if (vap->va_flags & SF_SETTABLE)
- return EPERM;
- }
- if (vap->va_flags & ~SF_ARCHIVED)
- return EOPNOTSUPP;
- if (vap->va_flags & SF_ARCHIVED)
- dep->de_Attributes &= ~ATTR_ARCHIVE;
- else if (!(dep->de_Attributes & ATTR_DIRECTORY))
- dep->de_Attributes |= ATTR_ARCHIVE;
- dep->de_flag |= DE_MODIFIED;
- }
-
- if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
- uid_t uid;
- gid_t gid;
-
- if (vp->v_mount->mnt_flag & MNT_RDONLY)
- return (EROFS);
- uid = vap->va_uid;
- if (uid == (uid_t)VNOVAL)
- uid = pmp->pm_uid;
- gid = vap->va_gid;
- if (gid == (gid_t)VNOVAL)
- gid = pmp->pm_gid;
- if ((cred->cr_uid != pmp->pm_uid || uid != pmp->pm_uid ||
- (gid != pmp->pm_gid && !groupmember(gid, cred))) &&
- (error = suser_xxx(cred, ap->a_p, PRISON_ROOT)))
- return error;
- if (uid != pmp->pm_uid || gid != pmp->pm_gid)
- return EINVAL;
- }
-
- if (vap->va_size != VNOVAL) {
- /*
- * Disallow write attempts on read-only file systems;
- * unless the file is a socket, fifo, or a block or
- * character device resident on the file system.
- */
- switch (vp->v_type) {
- case VDIR:
- return (EISDIR);
- /* NOT REACHED */
- case VLNK:
- case VREG:
- if (vp->v_mount->mnt_flag & MNT_RDONLY)
- return (EROFS);
- break;
- default:
- break;
- }
- error = detrunc(dep, vap->va_size, 0, cred, ap->a_p);
- 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);
- if (cred->cr_uid != pmp->pm_uid &&
- (error = suser_xxx(cred, ap->a_p, PRISON_ROOT)) &&
- ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
- (error = VOP_ACCESS(ap->a_vp, VWRITE, cred, ap->a_p))))
- return (error);
- if (vp->v_type != VDIR) {
- if ((pmp->pm_flags & MSDOSFSMNT_NOWIN95) == 0 &&
- vap->va_atime.tv_sec != VNOVAL)
- unix2dostime(&vap->va_atime, &dep->de_ADate, NULL, NULL);
- if (vap->va_mtime.tv_sec != VNOVAL)
- unix2dostime(&vap->va_mtime, &dep->de_MDate, &dep->de_MTime, NULL);
- 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 = suser_xxx(cred, ap->a_p, PRISON_ROOT)))
- 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_flag |= DE_MODIFIED;
- }
- }
- return (deupdat(dep, 1));
-}
-
-static int
-msdosfs_read(ap)
- struct vop_read_args /* {
- struct vnode *a_vp;
- struct uio *a_uio;
- int a_ioflag;
- struct ucred *a_cred;
- } */ *ap;
-{
- int error = 0;
- int blsize;
- int isadir;
- int 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 (uio->uio_offset < 0)
- return (EINVAL);
-
- if ((uoff_t)uio->uio_offset > DOS_FILESIZE_MAX)
- return (0);
- /*
- * If they didn't ask for any data, then we are done.
- */
- orig_resid = uio->uio_resid;
- if (orig_resid <= 0)
- return (0);
-
- seqcount = ap->a_ioflag >> 16;
-
- isadir = dep->de_Attributes & ATTR_DIRECTORY;
- do {
- if (uio->uio_offset >= dep->de_FileSize)
- break;
- lbn = de_cluster(pmp, uio->uio_offset);
- /*
- * 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 {
- blsize = pmp->pm_bpcluster;
- rablock = lbn + 1;
- if (seqcount > 1 &&
- de_cn2off(pmp, rablock) < dep->de_FileSize) {
- rasize = pmp->pm_bpcluster;
- error = breadn(vp, lbn, blsize,
- &rablock, &rasize, 1, NOCRED, &bp);
- } else {
- error = bread(vp, lbn, blsize, NOCRED, &bp);
- }
- }
- if (error) {
- brelse(bp);
- break;
- }
- on = uio->uio_offset & pmp->pm_crbomask;
- 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) == 0)
- dep->de_flag |= DE_ACCESS;
- return (error);
-}
-
-/*
- * Write data to a file or directory.
- */
-static int
-msdosfs_write(ap)
- struct vop_write_args /* {
- struct vnode *a_vp;
- struct uio *a_uio;
- int a_ioflag;
- struct ucred *a_cred;
- } */ *ap;
-{
- int n;
- int croffset;
- int resid;
- u_long osize;
- int error = 0;
- u_long count;
- daddr_t bn, lastcn;
- struct buf *bp;
- int ioflag = ap->a_ioflag;
- struct uio *uio = ap->a_uio;
- struct proc *p = uio->uio_procp;
- 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");
- }
-
- if (uio->uio_offset < 0)
- return (EFBIG);
-
- if (uio->uio_resid == 0)
- return (0);
-
- /*
- * If they've exceeded their filesize limit, tell them about it.
- */
- if (p &&
- ((uoff_t)uio->uio_offset + uio->uio_resid >
- p->p_rlimit[RLIMIT_FSIZE].rlim_cur)) {
- PROC_LOCK(p);
- psignal(p, SIGXFSZ);
- PROC_UNLOCK(p);
- return (EFBIG);
- }
-
- if ((uoff_t)uio->uio_offset + uio->uio_resid > DOS_FILESIZE_MAX)
- 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;
-
- 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);
- 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, &bp->b_blkno,
- 0, 0);
- if (error)
- bp->b_blkno = -1;
- }
- 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;
- }
-
- /*
- * If they want this synchronous then write it and wait for
- * it. Otherwise, if on a cluster boundary write it
- * asynchronously so we can move on to the next block
- * without delay. Otherwise do a delayed write because we
- * may want to write somemore into the block later.
- */
- if (ioflag & IO_SYNC)
- (void) bwrite(bp);
- else if (n + croffset == pmp->pm_bpcluster)
- 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, NULL);
- uio->uio_offset -= resid - uio->uio_resid;
- uio->uio_resid = resid;
- } else {
- detrunc(dep, dep->de_FileSize, ioflag & IO_SYNC, NOCRED, NULL);
- 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.
- *
- * This function is worthless for vnodes that represent directories. Maybe we
- * could just do a sync if they try an fsync on a directory file.
- */
-static int
-msdosfs_fsync(ap)
- struct vop_fsync_args /* {
- struct vnode *a_vp;
- struct ucred *a_cred;
- int a_waitfor;
- struct proc *a_p;
- } */ *ap;
-{
- struct vnode *vp = ap->a_vp;
- int s;
- struct buf *bp, *nbp;
-
- /*
- * Flush all dirty buffers associated with a vnode.
- */
-loop:
- s = splbio();
- for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
- nbp = TAILQ_NEXT(bp, b_vnbufs);
- if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT))
- continue;
- if ((bp->b_flags & B_DELWRI) == 0)
- panic("msdosfs_fsync: not dirty");
- bremfree(bp);
- splx(s);
- (void) bwrite(bp);
- goto loop;
- }
- while (vp->v_numoutput) {
- vp->v_flag |= VBWAIT;
- (void) tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "msdosfsn", 0);
- }
-#ifdef DIAGNOSTIC
- if (!TAILQ_EMPTY(&vp->v_dirtyblkhd)) {
- vprint("msdosfs_fsync: dirty", vp);
- goto loop;
- }
-#endif
- splx(s);
- return (deupdat(VTODE(vp), ap->a_waitfor == MNT_WAIT));
-}
-
-static int
-msdosfs_remove(ap)
- struct vop_remove_args /* {
- struct vnode *a_dvp;
- struct vnode *a_vp;
- struct componentname *a_cnp;
- } */ *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(ap)
- struct vop_link_args /* {
- struct vnode *a_tdvp;
- struct vnode *a_vp;
- struct componentname *a_cnp;
- } */ *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(ap)
- struct vop_rename_args /* {
- struct vnode *a_fdvp;
- struct vnode *a_fvp;
- struct componentname *a_fcnp;
- struct vnode *a_tdvp;
- struct vnode *a_tvp;
- struct componentname *a_tcnp;
- } */ *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 proc *p = fcnp->cn_proc;
- struct denode *ip, *xp, *dp, *zp;
- u_char toname[11], oldname[11];
- u_long from_diroffset, to_diroffset;
- u_char to_count;
- int doingdirectory = 0, newparent = 0;
- int error;
- u_long cn;
- daddr_t bn;
- struct denode *fddep; /* from file's parent directory */
- struct denode *fdep; /* from file or directory */
- struct denode *tddep; /* to file's parent directory */
- struct denode *tdep; /* to file or directory */
- struct msdosfsmount *pmp;
- struct direntry *dotdotp;
- struct buf *bp;
-
- fddep = VTODE(ap->a_fdvp);
- fdep = VTODE(ap->a_fvp);
- tddep = VTODE(ap->a_tdvp);
- tdep = tvp ? VTODE(tvp) : NULL;
- pmp = fddep->de_pmp;
-
- 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, p);
- 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, p);
- 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 heirarchy 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_proc);
- VOP_UNLOCK(fvp, 0, p);
- 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, p);
- if (relookup(fdvp, &fvp, fcnp) == 0)
- vrele(fdvp);
- if (fvp == NULL) {
- /*
- * From name has disappeared.
- */
- if (doingdirectory)
- panic("rename: lost dir entry");
- vrele(ap->a_fvp);
- if (newparent)
- VOP_UNLOCK(tdvp, 0, p);
- vrele(tdvp);
- 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");
- vrele(ap->a_fvp);
- VOP_UNLOCK(fvp, 0, p);
- if (newparent)
- VOP_UNLOCK(fdvp, 0, p);
- 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, p);
- VOP_UNLOCK(fvp, 0, p);
- goto bad;
- }
- ip->de_refcnt++;
- zp->de_fndoffset = from_diroffset;
- error = removede(zp, ip);
- if (error) {
- /* XXX should really panic here, fs is corrupt */
- if (newparent)
- VOP_UNLOCK(fdvp, 0, p);
- VOP_UNLOCK(fvp, 0, p);
- goto bad;
- }
- if (!doingdirectory) {
- error = pcbmap(dp, de_cluster(pmp, to_diroffset), 0,
- &ip->de_dirclust, 0);
- if (error) {
- /* XXX should really panic here, fs is corrupt */
- if (newparent)
- VOP_UNLOCK(fdvp, 0, p);
- VOP_UNLOCK(fvp, 0, p);
- 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, p);
- }
-
- /*
- * 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 really panic here, fs is corrupt */
- brelse(bp);
- VOP_UNLOCK(fvp, 0, p);
- goto bad;
- }
- dotdotp = (struct direntry *)bp->b_data + 1;
- putushort(dotdotp->deStartCluster, dp->de_StartCluster);
- if (FAT32(pmp))
- putushort(dotdotp->deHighClust, dp->de_StartCluster >> 16);
- error = bwrite(bp);
- if (error) {
- /* XXX should really panic here, fs is corrupt */
- VOP_UNLOCK(fvp, 0, p);
- goto bad;
- }
- }
-
- VOP_UNLOCK(fvp, 0, p);
-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(ap)
- struct vop_mkdir_args /* {
- struct vnode *a_dvp;
- struvt vnode **a_vpp;
- struvt componentname *a_cnp;
- struct vattr *a_vap;
- } */ *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);
- 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;
- if (FAT32(pmp) && pcl == pmp->pm_rootdirblk)
- pcl = 0;
- 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, pdep->de_StartCluster >> 16);
- }
-
- error = bwrite(bp);
- if (error)
- 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;
- ndirent.de_dev = pdep->de_dev;
- ndirent.de_devvp = pdep->de_devvp;
- 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(ap)
- struct vop_rmdir_args /* {
- struct vnode *a_dvp;
- struct vnode *a_vp;
- struct componentname *a_cnp;
- } */ *ap;
-{
- register struct vnode *vp = ap->a_vp;
- register struct vnode *dvp = ap->a_dvp;
- register struct componentname *cnp = ap->a_cnp;
- register struct denode *ip, *dp;
- struct proc *p = cnp->cn_proc;
- 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);
- VOP_UNLOCK(dvp, 0, p);
- /*
- * Truncate the directory that is being deleted.
- */
- error = detrunc(ip, (u_long)0, IO_SYNC, cnp->cn_cred, p);
- cache_purge(vp);
-
- vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, p);
-out:
- return (error);
-}
-
-/*
- * DOS filesystems don't know what symlinks are.
- */
-static int
-msdosfs_symlink(ap)
- struct vop_symlink_args /* {
- struct vnode *a_dvp;
- struct vnode **a_vpp;
- struct componentname *a_cnp;
- struct vattr *a_vap;
- char *a_target;
- } */ *ap;
-{
- return (EOPNOTSUPP);
-}
-
-static int
-msdosfs_readdir(ap)
- struct vop_readdir_args /* {
- struct vnode *a_vp;
- struct uio *a_uio;
- struct ucred *a_cred;
- int *a_eofflag;
- int *a_ncookies;
- u_long **a_cookies;
- } */ *ap;
-{
- int error = 0;
- int diff;
- long n;
- int blsize;
- long on;
- u_long cn;
- u_long 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 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;
- MALLOC(cookies, u_long *, 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))
- dirbuf.d_fileno = cntobn(pmp,
- pmp->pm_rootdirblk)
- * dirsperblk;
- else
- dirbuf.d_fileno = 1;
- 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((caddr_t) &dirbuf,
- dirbuf.d_reclen, uio);
- if (error)
- goto out;
- offset += sizeof(struct direntry);
- off = offset;
- if (cookies) {
- *cookies++ = offset;
- if (--ncookies <= 0)
- goto out;
- }
- }
- }
- }
-
- 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);
-
- /*
- * 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;
- continue;
- }
-
- /*
- * Handle Win95 long directory entries
- */
- if (dentp->deAttributes == ATTR_WIN95) {
- if (pmp->pm_flags & MSDOSFSMNT_SHORTNAME)
- continue;
- chksum = win2unixfn((struct winentry *)dentp,
- &dirbuf, chksum,
- pmp->pm_flags & MSDOSFSMNT_U2WTABLE,
- pmp->pm_u2w);
- continue;
- }
-
- /*
- * Skip volume labels
- */
- if (dentp->deAttributes & ATTR_VOLUME) {
- chksum = -1;
- 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 = cntobn(pmp,
- pmp->pm_rootdirblk)
- * dirsperblk;
- else
- fileno = 1;
- else
- fileno = cntobn(pmp, fileno) * dirsperblk;
- dirbuf.d_fileno = fileno;
- dirbuf.d_type = DT_DIR;
- } else {
- dirbuf.d_fileno = offset / sizeof(struct direntry);
- dirbuf.d_type = DT_REG;
- }
- 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->pm_flags & MSDOSFSMNT_U2WTABLE,
- pmp->pm_d2u,
- pmp->pm_flags & MSDOSFSMNT_ULTABLE,
- pmp->pm_ul);
- else
- dirbuf.d_name[dirbuf.d_namlen] = 0;
- chksum = -1;
- dirbuf.d_reclen = GENERIC_DIRSIZ(&dirbuf);
- if (uio->uio_resid < dirbuf.d_reclen) {
- brelse(bp);
- goto out;
- }
- error = uiomove((caddr_t) &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);
-}
-
-/*
- * vp - address of vnode file the file
- * bn - which cluster we are interested in mapping to a filesystem block number.
- * vpp - returns the vnode for the block special file holding the filesystem
- * containing the file of interest
- * bnp - address of where to return the filesystem relative block number
- */
-static int
-msdosfs_bmap(ap)
- struct vop_bmap_args /* {
- struct vnode *a_vp;
- daddr_t a_bn;
- struct vnode **a_vpp;
- daddr_t *a_bnp;
- int *a_runp;
- int *a_runb;
- } */ *ap;
-{
- struct denode *dep = VTODE(ap->a_vp);
-
- if (ap->a_vpp != NULL)
- *ap->a_vpp = dep->de_devvp;
- if (ap->a_bnp == NULL)
- return (0);
- if (ap->a_runp) {
- /*
- * Sequential clusters should be counted here.
- */
- *ap->a_runp = 0;
- }
- if (ap->a_runb) {
- *ap->a_runb = 0;
- }
- return (pcbmap(dep, ap->a_bn, ap->a_bnp, 0, 0));
-}
-
-static int
-msdosfs_strategy(ap)
- struct vop_strategy_args /* {
- struct vnode *a_vp;
- struct buf *a_bp;
- } */ *ap;
-{
- struct buf *bp = ap->a_bp;
- struct denode *dep = VTODE(bp->b_vp);
- struct vnode *vp;
- int error = 0;
-
- if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR)
- panic("msdosfs_strategy: spec");
- /*
- * 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, &bp->b_blkno, 0, 0);
- if (error) {
- bp->b_error = error;
- bp->b_ioflags |= BIO_ERROR;
- bufdone(bp);
- return (error);
- }
- 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.
- */
- vp = dep->de_devvp;
- bp->b_dev = vp->v_rdev;
- VOP_STRATEGY(vp, bp);
- return (0);
-}
-
-static int
-msdosfs_print(ap)
- struct vop_print_args /* {
- struct vnode *vp;
- } */ *ap;
-{
- struct denode *dep = VTODE(ap->a_vp);
-
- printf(
- "tag VT_MSDOSFS, startcluster %lu, dircluster %lu, diroffset %lu ",
- dep->de_StartCluster, dep->de_dirclust, dep->de_diroffset);
- printf(" dev %d, %d", major(dep->de_dev), minor(dep->de_dev));
- lockmgr_printinfo(&ap->a_vp->v_lock);
- printf("\n");
- return (0);
-}
-
-static int
-msdosfs_pathconf(ap)
- struct vop_pathconf_args /* {
- struct vnode *a_vp;
- int a_name;
- int *a_retval;
- } */ *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 */
-}
-
-
-/* Global vfs data structures for msdosfs */
-vop_t **msdosfs_vnodeop_p;
-static struct vnodeopv_entry_desc msdosfs_vnodeop_entries[] = {
- { &vop_default_desc, (vop_t *) vop_defaultop },
- { &vop_access_desc, (vop_t *) msdosfs_access },
- { &vop_bmap_desc, (vop_t *) msdosfs_bmap },
- { &vop_cachedlookup_desc, (vop_t *) msdosfs_lookup },
- { &vop_close_desc, (vop_t *) msdosfs_close },
- { &vop_create_desc, (vop_t *) msdosfs_create },
- { &vop_fsync_desc, (vop_t *) msdosfs_fsync },
- { &vop_getattr_desc, (vop_t *) msdosfs_getattr },
- { &vop_inactive_desc, (vop_t *) msdosfs_inactive },
- { &vop_islocked_desc, (vop_t *) vop_stdislocked },
- { &vop_link_desc, (vop_t *) msdosfs_link },
- { &vop_lock_desc, (vop_t *) vop_stdlock },
- { &vop_lookup_desc, (vop_t *) vfs_cache_lookup },
- { &vop_mkdir_desc, (vop_t *) msdosfs_mkdir },
- { &vop_mknod_desc, (vop_t *) msdosfs_mknod },
- { &vop_pathconf_desc, (vop_t *) msdosfs_pathconf },
- { &vop_print_desc, (vop_t *) msdosfs_print },
- { &vop_read_desc, (vop_t *) msdosfs_read },
- { &vop_readdir_desc, (vop_t *) msdosfs_readdir },
- { &vop_reclaim_desc, (vop_t *) msdosfs_reclaim },
- { &vop_remove_desc, (vop_t *) msdosfs_remove },
- { &vop_rename_desc, (vop_t *) msdosfs_rename },
- { &vop_rmdir_desc, (vop_t *) msdosfs_rmdir },
- { &vop_setattr_desc, (vop_t *) msdosfs_setattr },
- { &vop_strategy_desc, (vop_t *) msdosfs_strategy },
- { &vop_symlink_desc, (vop_t *) msdosfs_symlink },
- { &vop_unlock_desc, (vop_t *) vop_stdunlock },
- { &vop_write_desc, (vop_t *) msdosfs_write },
- { NULL, NULL }
-};
-static struct vnodeopv_desc msdosfs_vnodeop_opv_desc =
- { &msdosfs_vnodeop_p, msdosfs_vnodeop_entries };
-
-VNODEOP_SET(msdosfs_vnodeop_opv_desc);