3ac4d1ef0c
Fixed everything that depended on getting fcntl.h stuff from the wrong place. Most things don't depend on file.h stuff at all.
801 lines
22 KiB
C
801 lines
22 KiB
C
/* $Id: msdosfs_vfsops.c,v 1.18 1997/03/18 19:50:10 peter Exp $ */
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/* $NetBSD: msdosfs_vfsops.c,v 1.19 1994/08/21 18:44:10 ws Exp $ */
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/*-
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* Copyright (C) 1994 Wolfgang Solfrank.
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* Copyright (C) 1994 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/namei.h>
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#include <sys/proc.h>
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#include <sys/kernel.h>
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#include <sys/vnode.h>
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#include <miscfs/specfs/specdev.h> /* XXX */ /* defines v_rdev */
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#include <sys/mount.h>
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#include <sys/buf.h>
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#include <sys/fcntl.h>
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#include <sys/malloc.h>
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#include <msdosfs/bpb.h>
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#include <msdosfs/bootsect.h>
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#include <msdosfs/direntry.h>
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#include <msdosfs/denode.h>
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#include <msdosfs/msdosfsmount.h>
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#include <msdosfs/fat.h>
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static int mountmsdosfs __P((struct vnode *devvp, struct mount *mp,
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struct proc *p));
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static int msdosfs_fhtovp __P((struct mount *, struct fid *,
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struct mbuf *, struct vnode **, int *,
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struct ucred **));
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static int msdosfs_mount __P((struct mount *, char *, caddr_t,
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struct nameidata *, struct proc *));
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static int msdosfs_quotactl __P((struct mount *, int, uid_t, caddr_t,
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struct proc *));
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static int msdosfs_root __P((struct mount *, struct vnode **));
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static int msdosfs_start __P((struct mount *, int, struct proc *));
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static int msdosfs_statfs __P((struct mount *, struct statfs *,
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struct proc *));
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static int msdosfs_sync __P((struct mount *, int, struct ucred *,
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struct proc *));
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static int msdosfs_unmount __P((struct mount *, int, struct proc *));
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static int msdosfs_vget __P((struct mount *mp, ino_t ino,
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struct vnode **vpp));
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static int msdosfs_vptofh __P((struct vnode *, struct fid *));
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/*
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* mp - path - addr in user space of mount point (ie /usr or whatever)
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* data - addr in user space of mount params including the name of the block
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* special file to treat as a filesystem.
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*/
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static int
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msdosfs_mount(mp, path, data, ndp, p)
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struct mount *mp;
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char *path;
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caddr_t data;
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struct nameidata *ndp;
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struct proc *p;
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{
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struct vnode *devvp; /* vnode for blk device to mount */
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struct msdosfs_args args; /* will hold data from mount request */
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struct msdosfsmount *pmp; /* msdosfs specific mount control block */
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int error, flags;
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u_int size;
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struct ucred *cred, *scred;
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struct vattr va;
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/*
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* Copy in the args for the mount request.
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*/
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error = copyin(data, (caddr_t) & args, sizeof(struct msdosfs_args));
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if (error)
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return error;
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/*
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* If they just want to update then be sure we can do what is
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* asked. Can't change a filesystem from read/write to read only.
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* Why? And if they've supplied a new device file name then we
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* continue, otherwise return.
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*/
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if (mp->mnt_flag & MNT_UPDATE) {
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pmp = (struct msdosfsmount *) mp->mnt_data;
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error = 0;
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if (pmp->pm_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
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flags = WRITECLOSE;
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if (mp->mnt_flag & MNT_FORCE)
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flags |= FORCECLOSE;
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error = vflush(mp, NULLVP, flags);
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}
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if (!error && (mp->mnt_flag & MNT_RELOAD))
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/* not yet implemented */
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error = EINVAL;
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if (error)
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return error;
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if (pmp->pm_ronly && (mp->mnt_flag & MNT_WANTRDWR))
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pmp->pm_ronly = 0;
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if (args.fspec == 0) {
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/*
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* Process export requests.
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*/
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return vfs_export(mp, &pmp->pm_export, &args.export);
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}
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} else
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pmp = NULL;
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/*
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* check to see that the user in owns the target directory.
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* Note the very XXX trick to make sure we're checking as the
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* real user -- were mount() executable by anyone, this wouldn't
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* be a problem.
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*
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* XXX there should be one consistent error out.
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*/
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cred = crdup(p->p_ucred); /* XXX */
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cred->cr_uid = p->p_cred->p_ruid; /* XXX */
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error = VOP_GETATTR(mp->mnt_vnodecovered, &va, cred, p);
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if (error) {
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crfree(cred); /* XXX */
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return error;
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}
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if (cred->cr_uid != 0) {
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if (va.va_uid != cred->cr_uid) {
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error = EACCES;
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crfree(cred); /* XXX */
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return error;
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}
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/* a user mounted it; we'll verify permissions when unmounting */
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mp->mnt_flag |= MNT_USER;
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}
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/*
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* Now, lookup the name of the block device this mount or name
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* update request is to apply to.
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*/
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NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p);
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scred = p->p_ucred; /* XXX */
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p->p_ucred = cred; /* XXX */
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error = namei(ndp);
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p->p_ucred = scred; /* XXX */
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crfree(cred); /* XXX */
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if (error != 0)
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return error;
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/*
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* Be sure they've given us a block device to treat as a
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* filesystem. And, that its major number is within the bdevsw
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* table.
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*/
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devvp = ndp->ni_vp;
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if (devvp->v_type != VBLK) {
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vrele(devvp);
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return ENOTBLK;
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}
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if (major(devvp->v_rdev) >= nblkdev) {
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vrele(devvp);
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return ENXIO;
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}
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/*
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* If this is an update, then make sure the vnode for the block
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* special device is the same as the one our filesystem is in.
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*/
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if (mp->mnt_flag & MNT_UPDATE) {
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if (devvp != pmp->pm_devvp)
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error = EINVAL;
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else
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vrele(devvp);
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} else {
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/*
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* Well, it's not an update, it's a real mount request.
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* Time to get dirty.
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*/
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error = mountmsdosfs(devvp, mp, p);
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}
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if (error) {
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vrele(devvp);
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return error;
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}
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/*
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* Copy in the name of the directory the filesystem is to be
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* mounted on. Then copy in the name of the block special file
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* representing the filesystem being mounted. And we clear the
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* remainder of the character strings to be tidy. Set up the
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* user id/group id/mask as specified by the user. Then, we try to
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* fill in the filesystem stats structure as best we can with
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* whatever applies from a dos file system.
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*/
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pmp = (struct msdosfsmount *) mp->mnt_data;
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copyinstr(path, (caddr_t) mp->mnt_stat.f_mntonname,
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sizeof(mp->mnt_stat.f_mntonname) - 1, &size);
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bzero(mp->mnt_stat.f_mntonname + size,
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sizeof(mp->mnt_stat.f_mntonname) - size);
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copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
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bzero(mp->mnt_stat.f_mntfromname + size,
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MNAMELEN - size);
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pmp->pm_mounter = p->p_cred->p_ruid;
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pmp->pm_gid = args.gid;
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pmp->pm_uid = args.uid;
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pmp->pm_mask = args.mask;
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(void) msdosfs_statfs(mp, &mp->mnt_stat, p);
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#ifdef MSDOSFS_DEBUG
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printf("msdosfs_mount(): mp %p, pmp %p, inusemap %p\n", mp, pmp, pmp->pm_inusemap);
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#endif
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return 0;
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}
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static int
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mountmsdosfs(devvp, mp, p)
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struct vnode *devvp;
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struct mount *mp;
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struct proc *p;
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{
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int i;
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int bpc;
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int bit;
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int error;
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int needclose;
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int ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
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dev_t dev = devvp->v_rdev;
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union bootsector *bsp;
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struct msdosfsmount *pmp = NULL;
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struct buf *bp0 = NULL;
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struct byte_bpb33 *b33;
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struct byte_bpb50 *b50;
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#ifdef PC98
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u_int pc98_wrk;
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u_int Phy_Sector_Size;
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#endif
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/*
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* Multiple mounts of the same block special file aren't allowed.
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* Make sure no one else has the special file open. And flush any
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* old buffers from this filesystem. Presumably this prevents us
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* from running into buffers that are the wrong blocksize.
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*/
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error = vfs_mountedon(devvp);
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if (error)
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return error;
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if (vcount(devvp) > 1)
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return EBUSY;
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error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0);
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if (error)
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return error;
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/*
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* Now open the block special file.
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*/
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error = VOP_OPEN(devvp, ronly ? FREAD : FREAD | FWRITE, FSCRED, p);
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if (error)
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return error;
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needclose = 1;
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#ifdef HDSUPPORT
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/*
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* Put this in when we support reading dos filesystems from
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* partitioned harddisks.
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*/
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if (VOP_IOCTL(devvp, DIOCGPART, &msdosfspart, FREAD, NOCRED, p) == 0) {
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}
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#endif
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/*
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* Read the boot sector of the filesystem, and then check the boot
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* signature. If not a dos boot sector then error out. We could
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* also add some checking on the bsOemName field. So far I've seen
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* the following values: "IBM 3.3" "MSDOS3.3" "MSDOS5.0"
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*/
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#ifdef PC98
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devvp->v_flag &= 0xffff;
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error = bread(devvp, 0, 1024, NOCRED, &bp0);
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#else
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error = bread(devvp, 0, 512, NOCRED, &bp0);
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#endif
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if (error)
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goto error_exit;
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bp0->b_flags |= B_AGE;
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bsp = (union bootsector *) bp0->b_data;
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b33 = (struct byte_bpb33 *) bsp->bs33.bsBPB;
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b50 = (struct byte_bpb50 *) bsp->bs50.bsBPB;
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#ifdef MSDOSFS_CHECKSIG
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#ifdef PC98
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if (bsp->bs50.bsBootSectSig != BOOTSIG &&
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bsp->bs50.bsBootSectSig != 0 && /* PC98 DOS 3.3x */
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bsp->bs50.bsBootSectSig != 15760 && /* PC98 DOS 5.0 */
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bsp->bs50.bsBootSectSig != 64070) { /* PC98 DOS 3.3B */
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#else
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if (bsp->bs50.bsBootSectSig != BOOTSIG) {
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#endif
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error = EINVAL;
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goto error_exit;
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}
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#endif
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if ( bsp->bs50.bsJump[0] != 0xe9 &&
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(bsp->bs50.bsJump[0] != 0xeb || bsp->bs50.bsJump[2] != 0x90)) {
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error = EINVAL;
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goto error_exit;
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}
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pmp = malloc(sizeof *pmp, M_MSDOSFSMNT, M_WAITOK);
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bzero((caddr_t)pmp, sizeof *pmp);
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pmp->pm_mountp = mp;
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/*
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* Compute several useful quantities from the bpb in the
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* bootsector. Copy in the dos 5 variant of the bpb then fix up
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* the fields that are different between dos 5 and dos 3.3.
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*/
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pmp->pm_BytesPerSec = getushort(b50->bpbBytesPerSec);
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pmp->pm_SectPerClust = b50->bpbSecPerClust;
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pmp->pm_ResSectors = getushort(b50->bpbResSectors);
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pmp->pm_FATs = b50->bpbFATs;
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pmp->pm_RootDirEnts = getushort(b50->bpbRootDirEnts);
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pmp->pm_Sectors = getushort(b50->bpbSectors);
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pmp->pm_Media = b50->bpbMedia;
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pmp->pm_FATsecs = getushort(b50->bpbFATsecs);
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pmp->pm_SecPerTrack = getushort(b50->bpbSecPerTrack);
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pmp->pm_Heads = getushort(b50->bpbHeads);
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/* XXX - We should probably check more values here */
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if (!pmp->pm_BytesPerSec || !pmp->pm_SectPerClust ||
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!pmp->pm_Heads || pmp->pm_Heads > 255 ||
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#ifdef PC98
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!pmp->pm_SecPerTrack || pmp->pm_SecPerTrack > 255) {
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#else
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!pmp->pm_SecPerTrack || pmp->pm_SecPerTrack > 63) {
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#endif
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error = EINVAL;
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goto error_exit;
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}
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if (pmp->pm_Sectors == 0) {
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pmp->pm_HiddenSects = getulong(b50->bpbHiddenSecs);
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pmp->pm_HugeSectors = getulong(b50->bpbHugeSectors);
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} else {
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pmp->pm_HiddenSects = getushort(b33->bpbHiddenSecs);
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pmp->pm_HugeSectors = pmp->pm_Sectors;
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}
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#ifdef PC98 /* for PC98 added Satoshi Yasuda */
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Phy_Sector_Size = 512;
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if ((devvp->v_rdev>>8) == 2) { /* floppy check */
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if (((devvp->v_rdev&077) == 2) && (pmp->pm_HugeSectors == 1232)) {
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Phy_Sector_Size = 1024; /* 2HD */
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/*
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* 1024byte/sector support
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*/
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devvp->v_flag |= 0x10000;
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} else {
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if ((((devvp->v_rdev&077) == 3) /* 2DD 8 or 9 sector */
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&& (pmp->pm_HugeSectors == 1440)) /* 9 sector */
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|| (((devvp->v_rdev&077) == 4)
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&& (pmp->pm_HugeSectors == 1280)) /* 8 sector */
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|| (((devvp->v_rdev&077) == 5)
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&& (pmp->pm_HugeSectors == 2880))) { /* 1.44M */
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Phy_Sector_Size = 512;
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} else {
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if (((devvp->v_rdev&077) != 1)
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&& ((devvp->v_rdev&077) != 0)) { /* 2HC */
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error = EINVAL;
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goto error_exit;
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}
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}
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}
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}
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pc98_wrk = pmp->pm_BytesPerSec / Phy_Sector_Size;
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pmp->pm_BytesPerSec = Phy_Sector_Size;
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pmp->pm_SectPerClust = pmp->pm_SectPerClust * pc98_wrk;
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pmp->pm_HugeSectors = pmp->pm_HugeSectors * pc98_wrk;
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pmp->pm_ResSectors = pmp->pm_ResSectors * pc98_wrk;
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pmp->pm_FATsecs = pmp->pm_FATsecs * pc98_wrk;
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pmp->pm_SecPerTrack = pmp->pm_SecPerTrack * pc98_wrk;
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pmp->pm_HiddenSects = pmp->pm_HiddenSects * pc98_wrk;
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#endif /* */
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pmp->pm_fatblk = pmp->pm_ResSectors;
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pmp->pm_rootdirblk = pmp->pm_fatblk +
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(pmp->pm_FATs * pmp->pm_FATsecs);
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pmp->pm_rootdirsize = (pmp->pm_RootDirEnts * sizeof(struct direntry))
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/
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pmp->pm_BytesPerSec;/* in sectors */
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pmp->pm_firstcluster = pmp->pm_rootdirblk + pmp->pm_rootdirsize;
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pmp->pm_nmbrofclusters = (pmp->pm_HugeSectors - pmp->pm_firstcluster) /
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pmp->pm_SectPerClust;
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pmp->pm_maxcluster = pmp->pm_nmbrofclusters + 1;
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pmp->pm_fatsize = pmp->pm_FATsecs * pmp->pm_BytesPerSec;
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if (FAT12(pmp))
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/*
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* This will usually be a floppy disk. This size makes sure
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* that one fat entry will not be split across multiple
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* blocks.
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*/
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pmp->pm_fatblocksize = 3 * pmp->pm_BytesPerSec;
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else
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/*
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* This will usually be a hard disk. Reading or writing one
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* block should be quite fast.
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*/
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pmp->pm_fatblocksize = MAXBSIZE;
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pmp->pm_fatblocksec = pmp->pm_fatblocksize / pmp->pm_BytesPerSec;
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|
|
|
|
if ((pmp->pm_rootdirsize % pmp->pm_SectPerClust) != 0)
|
|
printf("mountmsdosfs(): Warning: root directory is not a multiple of the clustersize in length\n");
|
|
|
|
/*
|
|
* Compute mask and shift value for isolating cluster relative byte
|
|
* offsets and cluster numbers from a file offset.
|
|
*/
|
|
bpc = pmp->pm_SectPerClust * pmp->pm_BytesPerSec;
|
|
pmp->pm_bpcluster = bpc;
|
|
pmp->pm_depclust = bpc / sizeof(struct direntry);
|
|
pmp->pm_crbomask = bpc - 1;
|
|
if (bpc == 0) {
|
|
error = EINVAL;
|
|
goto error_exit;
|
|
}
|
|
bit = 1;
|
|
for (i = 0; i < 32; i++) {
|
|
if (bit & bpc) {
|
|
if (bit ^ bpc) {
|
|
error = EINVAL;
|
|
goto error_exit;
|
|
}
|
|
pmp->pm_cnshift = i;
|
|
break;
|
|
}
|
|
bit <<= 1;
|
|
}
|
|
|
|
#ifdef PC98
|
|
if (Phy_Sector_Size == 512) {
|
|
pmp->pm_brbomask = 0x01ff; /* 512 byte blocks only (so far) */
|
|
pmp->pm_bnshift = 9; /* shift right 9 bits to get bn */
|
|
} else {
|
|
pmp->pm_brbomask = 0x03ff;
|
|
pmp->pm_bnshift = 10;
|
|
}
|
|
#else
|
|
pmp->pm_brbomask = 0x01ff; /* 512 byte blocks only (so far) */
|
|
pmp->pm_bnshift = 9; /* shift right 9 bits to get bn */
|
|
#endif
|
|
|
|
/*
|
|
* Release the bootsector buffer.
|
|
*/
|
|
brelse(bp0);
|
|
bp0 = NULL;
|
|
|
|
/*
|
|
* Allocate memory for the bitmap of allocated clusters, and then
|
|
* fill it in.
|
|
*/
|
|
pmp->pm_inusemap = malloc(((pmp->pm_maxcluster + N_INUSEBITS - 1)
|
|
/ N_INUSEBITS)
|
|
* sizeof(*pmp->pm_inusemap),
|
|
M_MSDOSFSFAT, M_WAITOK);
|
|
|
|
/*
|
|
* fillinusemap() needs pm_devvp.
|
|
*/
|
|
pmp->pm_dev = dev;
|
|
pmp->pm_devvp = devvp;
|
|
|
|
/*
|
|
* Have the inuse map filled in.
|
|
*/
|
|
error = fillinusemap(pmp);
|
|
if (error)
|
|
goto error_exit;
|
|
|
|
/*
|
|
* If they want fat updates to be synchronous then let them suffer
|
|
* the performance degradation in exchange for the on disk copy of
|
|
* the fat being correct just about all the time. I suppose this
|
|
* would be a good thing to turn on if the kernel is still flakey.
|
|
*/
|
|
pmp->pm_waitonfat = mp->mnt_flag & MNT_SYNCHRONOUS;
|
|
|
|
/*
|
|
* Finish up.
|
|
*/
|
|
pmp->pm_ronly = ronly;
|
|
if (ronly == 0)
|
|
pmp->pm_fmod = 1;
|
|
mp->mnt_data = (qaddr_t) pmp;
|
|
mp->mnt_stat.f_fsid.val[0] = (long)dev;
|
|
mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
|
|
mp->mnt_flag |= MNT_LOCAL;
|
|
devvp->v_specflags |= SI_MOUNTEDON;
|
|
|
|
return 0;
|
|
|
|
error_exit:;
|
|
if (bp0)
|
|
brelse(bp0);
|
|
if (needclose)
|
|
(void) VOP_CLOSE(devvp, ronly ? FREAD : FREAD | FWRITE,
|
|
NOCRED, p);
|
|
if (pmp) {
|
|
if (pmp->pm_inusemap)
|
|
free((caddr_t) pmp->pm_inusemap, M_MSDOSFSFAT);
|
|
free((caddr_t) pmp, M_MSDOSFSMNT);
|
|
mp->mnt_data = (qaddr_t) 0;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
msdosfs_start(mp, flags, p)
|
|
struct mount *mp;
|
|
int flags;
|
|
struct proc *p;
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Unmount the filesystem described by mp.
|
|
*/
|
|
static int
|
|
msdosfs_unmount(mp, mntflags, p)
|
|
struct mount *mp;
|
|
int mntflags;
|
|
struct proc *p;
|
|
{
|
|
int flags = 0;
|
|
int error;
|
|
struct msdosfsmount *pmp = (struct msdosfsmount *) mp->mnt_data;
|
|
|
|
/* only the mounter, or superuser can unmount */
|
|
if ((p->p_cred->p_ruid != pmp->pm_mounter) &&
|
|
(error = suser(p->p_ucred, &p->p_acflag)))
|
|
return error;
|
|
|
|
if (mntflags & MNT_FORCE) {
|
|
flags |= FORCECLOSE;
|
|
}
|
|
error = vflush(mp, NULLVP, flags);
|
|
if (error)
|
|
return error;
|
|
pmp->pm_devvp->v_specflags &= ~SI_MOUNTEDON;
|
|
error = VOP_CLOSE(pmp->pm_devvp, pmp->pm_ronly ? FREAD : FREAD | FWRITE,
|
|
NOCRED, p);
|
|
vrele(pmp->pm_devvp);
|
|
free((caddr_t) pmp->pm_inusemap, M_MSDOSFSFAT);
|
|
free((caddr_t) pmp, M_MSDOSFSMNT);
|
|
mp->mnt_data = (qaddr_t) 0;
|
|
mp->mnt_flag &= ~MNT_LOCAL;
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
msdosfs_root(mp, vpp)
|
|
struct mount *mp;
|
|
struct vnode **vpp;
|
|
{
|
|
struct denode *ndep;
|
|
struct msdosfsmount *pmp = (struct msdosfsmount *) (mp->mnt_data);
|
|
int error;
|
|
|
|
error = deget(pmp, MSDOSFSROOT, MSDOSFSROOT_OFS, NULL, &ndep);
|
|
#ifdef MSDOSFS_DEBUG
|
|
printf("msdosfs_root(); mp %p, pmp %p, ndep %p, vp %p\n",
|
|
mp, pmp, ndep, DETOV(ndep));
|
|
#endif
|
|
if (error == 0)
|
|
*vpp = DETOV(ndep);
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
msdosfs_quotactl(mp, cmds, uid, arg, p)
|
|
struct mount *mp;
|
|
int cmds;
|
|
uid_t uid;
|
|
caddr_t arg;
|
|
struct proc *p;
|
|
{
|
|
return EOPNOTSUPP;
|
|
}
|
|
|
|
static int
|
|
msdosfs_statfs(mp, sbp, p)
|
|
struct mount *mp;
|
|
struct statfs *sbp;
|
|
struct proc *p;
|
|
{
|
|
struct msdosfsmount *pmp = (struct msdosfsmount *) mp->mnt_data;
|
|
|
|
/*
|
|
* Fill in the stat block.
|
|
*/
|
|
sbp->f_bsize = pmp->pm_bpcluster;
|
|
sbp->f_iosize = pmp->pm_bpcluster;
|
|
sbp->f_blocks = pmp->pm_nmbrofclusters;
|
|
sbp->f_bfree = pmp->pm_freeclustercount;
|
|
sbp->f_bavail = pmp->pm_freeclustercount;
|
|
sbp->f_files = pmp->pm_RootDirEnts; /* XXX */
|
|
sbp->f_ffree = 0; /* what to put in here? */
|
|
|
|
/*
|
|
* Copy the mounted on and mounted from names into the passed in
|
|
* stat block, if it is not the one in the mount structure.
|
|
*/
|
|
if (sbp != &mp->mnt_stat) {
|
|
sbp->f_type = mp->mnt_vfc->vfc_typenum;
|
|
bcopy((caddr_t) mp->mnt_stat.f_mntonname,
|
|
(caddr_t) & sbp->f_mntonname[0], MNAMELEN);
|
|
bcopy((caddr_t) mp->mnt_stat.f_mntfromname,
|
|
(caddr_t) & sbp->f_mntfromname[0], MNAMELEN);
|
|
}
|
|
#if 0
|
|
strncpy(&sbp->f_fstypename[0], mp->mnt_op->vfs_name, MFSNAMELEN);
|
|
sbp->f_fstypename[MFSNAMELEN] = '\0';
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
msdosfs_sync(mp, waitfor, cred, p)
|
|
struct mount *mp;
|
|
int waitfor;
|
|
struct ucred *cred;
|
|
struct proc *p;
|
|
{
|
|
struct vnode *vp;
|
|
struct denode *dep;
|
|
struct msdosfsmount *pmp;
|
|
int error;
|
|
int allerror = 0;
|
|
|
|
pmp = (struct msdosfsmount *) mp->mnt_data;
|
|
|
|
/*
|
|
* If we ever switch to not updating all of the fats all the time,
|
|
* this would be the place to update them from the first one.
|
|
*/
|
|
if (pmp->pm_fmod)
|
|
if (pmp->pm_ronly)
|
|
panic("msdosfs_sync: rofs mod");
|
|
else {
|
|
/* update fats here */
|
|
}
|
|
|
|
/*
|
|
* Go thru in memory denodes and write them out along with
|
|
* unwritten file blocks.
|
|
*/
|
|
simple_lock(&mntvnode_slock);
|
|
loop:
|
|
for (vp = mp->mnt_vnodelist.lh_first; vp;
|
|
vp = vp->v_mntvnodes.le_next) {
|
|
if (vp->v_mount != mp) /* not ours anymore */
|
|
goto loop;
|
|
simple_lock(&vp->v_interlock);
|
|
dep = VTODE(vp);
|
|
if ((dep->de_flag & (DE_MODIFIED | DE_UPDATE)) == 0 &&
|
|
vp->v_dirtyblkhd.lh_first == NULL) {
|
|
simple_unlock(&vp->v_interlock);
|
|
continue;
|
|
}
|
|
simple_unlock(&mntvnode_slock);
|
|
error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, p);
|
|
if (error) {
|
|
simple_lock(&mntvnode_slock);
|
|
if (error == ENOENT)
|
|
goto loop;
|
|
continue;
|
|
}
|
|
error = VOP_FSYNC(vp, cred, waitfor, p);
|
|
if (error)
|
|
allerror = error;
|
|
VOP_UNLOCK(vp, 0, p);
|
|
vrele(vp); /* done with this one */
|
|
simple_lock(&mntvnode_slock);
|
|
}
|
|
simple_unlock(&mntvnode_slock);
|
|
|
|
/*
|
|
* Flush filesystem control info.
|
|
*/
|
|
error = VOP_FSYNC(pmp->pm_devvp, cred, waitfor, p);
|
|
if (error)
|
|
allerror = error;
|
|
return allerror;
|
|
}
|
|
|
|
static int
|
|
msdosfs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp)
|
|
struct mount *mp;
|
|
struct fid *fhp;
|
|
struct mbuf *nam;
|
|
struct vnode **vpp;
|
|
int *exflagsp;
|
|
struct ucred **credanonp;
|
|
{
|
|
struct msdosfsmount *pmp = (struct msdosfsmount *) mp->mnt_data;
|
|
struct defid *defhp = (struct defid *) fhp;
|
|
struct denode *dep;
|
|
struct netcred *np;
|
|
int error;
|
|
|
|
np = vfs_export_lookup(mp, &pmp->pm_export, nam);
|
|
if (np == NULL)
|
|
return EACCES;
|
|
error = deget(pmp, defhp->defid_dirclust, defhp->defid_dirofs,
|
|
NULL, &dep);
|
|
if (error) {
|
|
*vpp = NULLVP;
|
|
return error;
|
|
}
|
|
*vpp = DETOV(dep);
|
|
*exflagsp = np->netc_exflags;
|
|
*credanonp = &np->netc_anon;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
msdosfs_vptofh(vp, fhp)
|
|
struct vnode *vp;
|
|
struct fid *fhp;
|
|
{
|
|
struct denode *dep = VTODE(vp);
|
|
struct defid *defhp = (struct defid *) fhp;
|
|
|
|
defhp->defid_len = sizeof(struct defid);
|
|
defhp->defid_dirclust = dep->de_dirclust;
|
|
defhp->defid_dirofs = dep->de_diroffset;
|
|
/* defhp->defid_gen = ip->i_gen; */
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
msdosfs_vget(mp, ino, vpp)
|
|
struct mount *mp;
|
|
ino_t ino;
|
|
struct vnode **vpp;
|
|
{
|
|
return EOPNOTSUPP;
|
|
}
|
|
|
|
static struct vfsops msdosfs_vfsops = {
|
|
msdosfs_mount,
|
|
msdosfs_start,
|
|
msdosfs_unmount,
|
|
msdosfs_root,
|
|
msdosfs_quotactl,
|
|
msdosfs_statfs,
|
|
msdosfs_sync,
|
|
msdosfs_vget,
|
|
msdosfs_fhtovp,
|
|
msdosfs_vptofh,
|
|
msdosfs_init
|
|
};
|
|
|
|
VFS_SET(msdosfs_vfsops, msdos, MOUNT_MSDOS, 0);
|