641 lines
17 KiB
C
641 lines
17 KiB
C
/*
|
|
* 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
|
|
*
|
|
* $Id: msdosfs_vfsops.c,v 1.7 1994/01/20 09:46:40 pk Exp $
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/namei.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/vnode.h>
|
|
#include <miscfs/specfs/specdev.h> /* XXX */ /* defines v_rdev */
|
|
#include <sys/mount.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/file.h>
|
|
#include <sys/malloc.h>
|
|
|
|
#include <msdosfs/bpb.h>
|
|
#include <msdosfs/bootsect.h>
|
|
#include <msdosfs/direntry.h>
|
|
#include <msdosfs/denode.h>
|
|
#include <msdosfs/msdosfsmount.h>
|
|
#include <msdosfs/fat.h>
|
|
|
|
int msdosfsdoforce = 0; /* 1 = force unmount */
|
|
|
|
/*
|
|
* mp - path - addr in user space of mount point (ie /usr or whatever)
|
|
* data - addr in user space of mount params including the name of the block
|
|
* special file to treat as a filesystem.
|
|
*/
|
|
int
|
|
msdosfs_mount(mp, path, data, ndp, p)
|
|
struct mount *mp;
|
|
char *path;
|
|
caddr_t data;
|
|
struct nameidata *ndp;
|
|
struct proc *p;
|
|
{
|
|
struct vnode *devvp; /* vnode for blk device to mount */
|
|
struct msdosfs_args args; /* will hold data from mount request */
|
|
struct msdosfsmount *pmp; /* msdosfs specific mount control block */
|
|
int error;
|
|
u_int size;
|
|
|
|
/*
|
|
* Copy in the args for the mount request.
|
|
*/
|
|
if (error = copyin(data, (caddr_t) & args, sizeof(struct msdosfs_args)))
|
|
return error;
|
|
|
|
#ifndef __NetBSD__
|
|
/*
|
|
* Check to see if they want it to be an exportable filesystem via
|
|
* nfs. And, if they do, should it be read only, and what uid is
|
|
* root to be mapped to.
|
|
*
|
|
* This is done in a completely different (and fs-indepdent) way
|
|
* in NetBSD.
|
|
*/
|
|
if ((args.exflags & MNT_EXPORTED) || (mp->mnt_flag & MNT_EXPORTED)) {
|
|
if (args.exflags & MNT_EXPORTED)
|
|
mp->mnt_flag |= MNT_EXPORTED;
|
|
else
|
|
mp->mnt_flag &= ~MNT_EXPORTED;
|
|
if (args.exflags & MNT_EXRDONLY)
|
|
mp->mnt_flag |= MNT_EXRDONLY;
|
|
else
|
|
mp->mnt_flag &= ~MNT_EXRDONLY;
|
|
mp->mnt_exroot = args.exroot;
|
|
}
|
|
#endif /* __NetBSD__ */
|
|
|
|
/*
|
|
* If they just want to update then be sure we can do what is
|
|
* asked. Can't change a filesystem from read/write to read only.
|
|
* Why? And if they've supplied a new device file name then we
|
|
* continue, otherwise return.
|
|
*/
|
|
if (mp->mnt_flag & MNT_UPDATE) {
|
|
pmp = (struct msdosfsmount *) mp->mnt_data;
|
|
if (pmp->pm_ronly && (mp->mnt_flag & MNT_RDONLY) == 0)
|
|
pmp->pm_ronly = 0;
|
|
if (args.fspec == 0)
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Now, lookup the name of the block device this mount or name
|
|
* update request is to apply to.
|
|
*/
|
|
ndp->ni_nameiop = LOOKUP | FOLLOW;
|
|
ndp->ni_segflg = UIO_USERSPACE;
|
|
ndp->ni_dirp = args.fspec;
|
|
if (error = namei(ndp, p))
|
|
return error;
|
|
|
|
/*
|
|
* Be sure they've given us a block device to treat as a
|
|
* filesystem. And, that its major number is within the bdevsw
|
|
* table.
|
|
*/
|
|
devvp = ndp->ni_vp;
|
|
if (devvp->v_type != VBLK) {
|
|
vrele(devvp); /* namei() acquires this? */
|
|
return ENOTBLK;
|
|
}
|
|
if (major(devvp->v_rdev) >= nblkdev) {
|
|
vrele(devvp);
|
|
return ENXIO;
|
|
}
|
|
|
|
/*
|
|
* If this is an update, then make sure the vnode for the block
|
|
* special device is the same as the one our filesystem is in.
|
|
*/
|
|
if (mp->mnt_flag & MNT_UPDATE) {
|
|
if (devvp != pmp->pm_devvp)
|
|
error = EINVAL;
|
|
else
|
|
vrele(devvp);
|
|
}
|
|
else {
|
|
|
|
/*
|
|
* Well, it's not an update, it's a real mount request.
|
|
* Time to get dirty.
|
|
*/
|
|
error = mountmsdosfs(devvp, mp, p);
|
|
}
|
|
if (error) {
|
|
vrele(devvp);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Copy in the name of the directory the filesystem is to be
|
|
* mounted on. Then copy in the name of the block special file
|
|
* representing the filesystem being mounted. And we clear the
|
|
* remainder of the character strings to be tidy. Then, we try to
|
|
* fill in the filesystem stats structure as best we can with
|
|
* whatever applies from a dos file system.
|
|
*/
|
|
pmp = (struct msdosfsmount *) mp->mnt_data;
|
|
copyinstr(path, (caddr_t) mp->mnt_stat.f_mntonname,
|
|
sizeof(mp->mnt_stat.f_mntonname) - 1, &size);
|
|
bzero(mp->mnt_stat.f_mntonname + size,
|
|
sizeof(mp->mnt_stat.f_mntonname) - size);
|
|
copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
|
|
bzero(mp->mnt_stat.f_mntfromname + size,
|
|
MNAMELEN - size);
|
|
(void) msdosfs_statfs(mp, &mp->mnt_stat, p);
|
|
#if defined(MSDOSFSDEBUG)
|
|
printf("msdosfs_mount(): mp %x, pmp %x, inusemap %x\n", mp, pmp, pmp->pm_inusemap);
|
|
#endif /* defined(MSDOSFSDEBUG) */
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
mountmsdosfs(devvp, mp, p)
|
|
struct vnode *devvp;
|
|
struct mount *mp;
|
|
struct proc *p;
|
|
{
|
|
int i;
|
|
int bpc;
|
|
int bit;
|
|
int error = 0;
|
|
int needclose;
|
|
int ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
|
|
dev_t dev = devvp->v_rdev;
|
|
union bootsector *bsp;
|
|
struct msdosfsmount *pmp = NULL;
|
|
struct buf *bp0 = NULL;
|
|
struct byte_bpb33 *b33;
|
|
struct byte_bpb50 *b50;
|
|
|
|
/*
|
|
* Multiple mounts of the same block special file aren't allowed.
|
|
* Make sure no one else has the special file open. And flush any
|
|
* old buffers from this filesystem. Presumably this prevents us
|
|
* from running into buffers that are the wrong blocksize. NOTE:
|
|
* mountedon() is a part of the ufs filesystem. If the ufs
|
|
* filesystem is not gen'ed into the system we will get an
|
|
* unresolved reference.
|
|
*/
|
|
if (error = mountedon(devvp)) {
|
|
return error;
|
|
}
|
|
if (vcount(devvp) > 1)
|
|
return EBUSY;
|
|
vinvalbuf(devvp, 1);
|
|
|
|
/*
|
|
* Now open the block special file.
|
|
*/
|
|
if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD | FWRITE, NOCRED, p))
|
|
return error;
|
|
needclose = 1;
|
|
#if defined(HDSUPPORT)
|
|
/*
|
|
* Put this in when we support reading dos filesystems from
|
|
* partitioned harddisks.
|
|
*/
|
|
if (VOP_IOCTL(devvp, DIOCGPART, &msdosfspart, FREAD, NOCRED, p) == 0) {
|
|
}
|
|
#endif /* defined(HDSUPPORT) */
|
|
|
|
/*
|
|
* Read the boot sector of the filesystem, and then check the boot
|
|
* signature. If not a dos boot sector then error out. We could
|
|
* also add some checking on the bsOemName field. So far I've seen
|
|
* the following values: "IBM 3.3" "MSDOS3.3" "MSDOS5.0"
|
|
*/
|
|
if (error = bread(devvp, 0, 512, NOCRED, &bp0))
|
|
goto error_exit;
|
|
bp0->b_flags |= B_AGE;
|
|
bsp = (union bootsector *) bp0->b_un.b_addr;
|
|
b33 = (struct byte_bpb33 *) bsp->bs33.bsBPB;
|
|
b50 = (struct byte_bpb50 *) bsp->bs50.bsBPB;
|
|
#ifdef MSDOSFS_CHECKSIG
|
|
if (bsp->bs50.bsBootSectSig != BOOTSIG) {
|
|
error = EINVAL;
|
|
goto error_exit;
|
|
}
|
|
#endif
|
|
if ( bsp->bs50.bsJump[0] != 0xe9 &&
|
|
(bsp->bs50.bsJump[0] != 0xeb || bsp->bs50.bsJump[2] != 0x90)) {
|
|
error = EINVAL;
|
|
goto error_exit;
|
|
}
|
|
|
|
pmp = malloc(sizeof *pmp, M_MSDOSFSMNT, M_WAITOK);
|
|
pmp->pm_inusemap = NULL;
|
|
pmp->pm_mountp = mp;
|
|
|
|
/*
|
|
* Compute several useful quantities from the bpb in the
|
|
* bootsector. Copy in the dos 5 variant of the bpb then fix up
|
|
* the fields that are different between dos 5 and dos 3.3.
|
|
*/
|
|
pmp->pm_BytesPerSec = getushort(b50->bpbBytesPerSec);
|
|
pmp->pm_SectPerClust = b50->bpbSecPerClust;
|
|
pmp->pm_ResSectors = getushort(b50->bpbResSectors);
|
|
pmp->pm_FATs = b50->bpbFATs;
|
|
pmp->pm_RootDirEnts = getushort(b50->bpbRootDirEnts);
|
|
pmp->pm_Sectors = getushort(b50->bpbSectors);
|
|
pmp->pm_Media = b50->bpbMedia;
|
|
pmp->pm_FATsecs = getushort(b50->bpbFATsecs);
|
|
pmp->pm_SecPerTrack = getushort(b50->bpbSecPerTrack);
|
|
pmp->pm_Heads = getushort(b50->bpbHeads);
|
|
|
|
/* XXX - We should probably check more values here */
|
|
if (!pmp->pm_BytesPerSec || !pmp->pm_SectPerClust ||
|
|
!pmp->pm_Heads || pmp->pm_Heads > 255 ||
|
|
!pmp->pm_SecPerTrack || pmp->pm_SecPerTrack > 63) {
|
|
error = EINVAL;
|
|
goto error_exit;
|
|
}
|
|
|
|
if (pmp->pm_Sectors == 0) {
|
|
pmp->pm_HiddenSects = getulong(b50->bpbHiddenSecs);
|
|
pmp->pm_HugeSectors = getulong(b50->bpbHugeSectors);
|
|
}
|
|
else {
|
|
pmp->pm_HiddenSects = getushort(b33->bpbHiddenSecs);
|
|
pmp->pm_HugeSectors = pmp->pm_Sectors;
|
|
}
|
|
pmp->pm_fatblk = pmp->pm_ResSectors;
|
|
pmp->pm_rootdirblk = pmp->pm_fatblk +
|
|
(pmp->pm_FATs * pmp->pm_FATsecs);
|
|
pmp->pm_rootdirsize = (pmp->pm_RootDirEnts * sizeof(struct direntry))
|
|
/
|
|
pmp->pm_BytesPerSec;/* in sectors */
|
|
pmp->pm_firstcluster = pmp->pm_rootdirblk + pmp->pm_rootdirsize;
|
|
pmp->pm_nmbrofclusters = (pmp->pm_HugeSectors - pmp->pm_firstcluster) /
|
|
pmp->pm_SectPerClust;
|
|
pmp->pm_maxcluster = pmp->pm_nmbrofclusters + 1;
|
|
pmp->pm_fatsize = pmp->pm_FATsecs * pmp->pm_BytesPerSec;
|
|
if (FAT12(pmp))
|
|
/*
|
|
* This will usually be a floppy disk. This size makes sure
|
|
* that one fat entry will not be split across multiple
|
|
* blocks.
|
|
*/
|
|
pmp->pm_fatblocksize = 3 * pmp->pm_BytesPerSec;
|
|
else
|
|
/*
|
|
* This will usually be a hard disk. Reading or writing one
|
|
* block should be quite fast.
|
|
*/
|
|
pmp->pm_fatblocksize = MAXBSIZE;
|
|
pmp->pm_fatblocksec = pmp->pm_fatblocksize / pmp->pm_BytesPerSec;
|
|
|
|
|
|
if ((pmp->pm_rootdirsize % pmp->pm_SectPerClust) != 0)
|
|
printf("mountmsdosfs(): 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;
|
|
}
|
|
|
|
pmp->pm_brbomask = 0x01ff; /* 512 byte blocks only (so far) */
|
|
pmp->pm_bnshift = 9; /* shift right 9 bits to get bn */
|
|
|
|
/*
|
|
* 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 >> 3) + 1,
|
|
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] = MOUNT_MSDOS;
|
|
mp->mnt_flag |= MNT_LOCAL;
|
|
#if defined(QUOTA)
|
|
/*
|
|
* If we ever do quotas for DOS filesystems this would be a place
|
|
* to fill in the info in the msdosfsmount structure. You dolt,
|
|
* quotas on dos filesystems make no sense because files have no
|
|
* owners on dos filesystems. of course there is some empty space
|
|
* in the directory entry where we could put uid's and gid's.
|
|
*/
|
|
#endif /* defined(QUOTA) */
|
|
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;
|
|
}
|
|
|
|
int
|
|
msdosfs_start(mp, flags, p)
|
|
struct mount *mp;
|
|
int flags;
|
|
struct proc *p;
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Unmount the filesystem described by mp.
|
|
*/
|
|
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;
|
|
struct vnode *vp = pmp->pm_devvp;
|
|
|
|
if (mntflags & MNT_FORCE) {
|
|
if (!msdosfsdoforce)
|
|
return EINVAL;
|
|
flags |= FORCECLOSE;
|
|
}
|
|
mntflushbuf(mp, 0);
|
|
if (mntinvalbuf(mp))
|
|
return EBUSY;
|
|
#if defined(QUOTA)
|
|
#endif /* defined(QUOTA) */
|
|
if (error = vflush(mp, NULLVP, flags))
|
|
return error;
|
|
pmp->pm_devvp->v_specflags &= ~SI_MOUNTEDON;
|
|
#if defined(MSDOSFSDEBUG)
|
|
printf("msdosfs_umount(): just before calling VOP_CLOSE()\n");
|
|
printf("flag %08x, usecount %d, writecount %d, holdcnt %d\n",
|
|
vp->v_flag, vp->v_usecount, vp->v_writecount, vp->v_holdcnt);
|
|
printf("lastr %d, id %d, mount %08x, op %08x\n",
|
|
vp->v_lastr, vp->v_id, vp->v_mount, vp->v_op);
|
|
printf("freef %08x, freeb %08x, mountf %08x, mountb %08x\n",
|
|
vp->v_freef, vp->v_freeb, vp->v_mountf, vp->v_mountb);
|
|
printf("cleanblkhd %08x, dirtyblkhd %08x, numoutput %d, type %d\n",
|
|
vp->v_cleanblkhd, vp->v_dirtyblkhd, vp->v_numoutput, vp->v_type);
|
|
printf("union %08x, tag %d, data[0] %08x, data[1] %08x\n",
|
|
vp->v_socket, vp->v_tag, vp->v_data[0], vp->v_data[1]);
|
|
#endif /* defined(MSDOSFSDEBUG) */
|
|
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;
|
|
}
|
|
|
|
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);
|
|
#if defined(MSDOSFSDEBUG)
|
|
printf("msdosfs_root(); mp %08x, pmp %08x, ndep %08x, vp %08x\n",
|
|
mp, pmp, ndep, DETOV(ndep));
|
|
#endif /* defined(MSDOSFSDEBUG) */
|
|
if (error == 0)
|
|
*vpp = DETOV(ndep);
|
|
return error;
|
|
}
|
|
|
|
int
|
|
msdosfs_quotactl(mp, cmds, uid, arg, p)
|
|
struct mount *mp;
|
|
int cmds;
|
|
uid_t uid;
|
|
caddr_t arg;
|
|
struct proc *p;
|
|
{
|
|
#if defined(QUOTA)
|
|
#else
|
|
return EOPNOTSUPP;
|
|
#endif /* defined(QUOTA) */
|
|
}
|
|
|
|
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_type = MOUNT_MSDOS;
|
|
sbp->f_fsize = pmp->pm_bpcluster;
|
|
sbp->f_bsize = 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;
|
|
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) {
|
|
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);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
msdosfs_sync(mp, waitfor)
|
|
struct mount *mp;
|
|
int waitfor;
|
|
{
|
|
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) {
|
|
printf("msdosfs_sync(): writing to readonly filesystem\n");
|
|
return EINVAL;
|
|
}
|
|
else {
|
|
/* update fats here */
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Go thru in memory denodes and write them out along with
|
|
* unwritten file blocks.
|
|
*/
|
|
loop:
|
|
for (vp = mp->mnt_mounth; vp; vp = vp->v_mountf) {
|
|
if (vp->v_mount != mp) /* not ours anymore */
|
|
goto loop;
|
|
if (VOP_ISLOCKED(vp)) /* file is busy */
|
|
continue;
|
|
dep = VTODE(vp);
|
|
if ((dep->de_flag & DEUPD) == 0 && vp->v_dirtyblkhd == NULL)
|
|
continue;
|
|
if (vget(vp)) /* not there anymore? */
|
|
goto loop;
|
|
if (vp->v_dirtyblkhd) /* flush dirty file blocks */
|
|
vflushbuf(vp, 0);
|
|
if ((dep->de_flag & DEUPD) &&
|
|
(error = deupdat(dep, &time, 0)))
|
|
allerror = error;
|
|
vput(vp); /* done with this one */
|
|
}
|
|
|
|
/*
|
|
* Flush filesystem control info.
|
|
*/
|
|
vflushbuf(pmp->pm_devvp, waitfor == MNT_WAIT ? B_SYNC : 0);
|
|
return allerror;
|
|
}
|
|
|
|
int
|
|
msdosfs_fhtovp(mp, fhp, vpp)
|
|
struct mount *mp;
|
|
struct fid *fhp;
|
|
struct vnode **vpp;
|
|
{
|
|
struct msdosfsmount *pmp = (struct msdosfsmount *) mp->mnt_data;
|
|
struct defid *defhp = (struct defid *) fhp;
|
|
struct denode *dep;
|
|
int error;
|
|
|
|
error = deget(pmp, defhp->defid_dirclust, defhp->defid_dirofs,
|
|
NULL, &dep);
|
|
if (error)
|
|
return (error);
|
|
*vpp = DETOV(dep);
|
|
return (0);
|
|
}
|
|
|
|
|
|
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);
|
|
}
|
|
|
|
struct vfsops msdosfs_vfsops = {
|
|
msdosfs_mount,
|
|
msdosfs_start,
|
|
msdosfs_unmount,
|
|
msdosfs_root,
|
|
msdosfs_quotactl,
|
|
msdosfs_statfs,
|
|
msdosfs_sync,
|
|
msdosfs_fhtovp,
|
|
msdosfs_vptofh,
|
|
msdosfs_init
|
|
};
|