NetBSD-5.0.2/sys/fs/ntfs/ntfs_vfsops.c
/* $NetBSD: ntfs_vfsops.c,v 1.72 2008/06/28 01:34:05 rumble Exp $ */
/*-
* Copyright (c) 1998, 1999 Semen Ustimenko
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Id: ntfs_vfsops.c,v 1.7 1999/05/31 11:28:30 phk Exp
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ntfs_vfsops.c,v 1.72 2008/06/28 01:34:05 rumble 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 <sys/mount.h>
#include <sys/buf.h>
#include <sys/fcntl.h>
#include <sys/malloc.h>
#include <sys/sysctl.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/kauth.h>
#include <sys/module.h>
#include <uvm/uvm_extern.h>
#include <miscfs/genfs/genfs.h>
#include <miscfs/specfs/specdev.h>
#include <fs/ntfs/ntfs.h>
#include <fs/ntfs/ntfs_inode.h>
#include <fs/ntfs/ntfs_subr.h>
#include <fs/ntfs/ntfs_vfsops.h>
#include <fs/ntfs/ntfs_ihash.h>
#include <fs/ntfs/ntfsmount.h>
MODULE(MODULE_CLASS_VFS, ntfs, NULL);
MALLOC_JUSTDEFINE(M_NTFSMNT, "NTFS mount", "NTFS mount structure");
MALLOC_JUSTDEFINE(M_NTFSNTNODE,"NTFS ntnode", "NTFS ntnode information");
MALLOC_JUSTDEFINE(M_NTFSFNODE,"NTFS fnode", "NTFS fnode information");
MALLOC_JUSTDEFINE(M_NTFSDIR,"NTFS dir", "NTFS dir buffer");
static int ntfs_mount(struct mount *, const char *, void *, size_t *);
static int ntfs_root(struct mount *, struct vnode **);
static int ntfs_start(struct mount *, int);
static int ntfs_statvfs(struct mount *, struct statvfs *);
static int ntfs_sync(struct mount *, int, kauth_cred_t);
static int ntfs_unmount(struct mount *, int);
static int ntfs_vget(struct mount *mp, ino_t ino,
struct vnode **vpp);
static int ntfs_mountfs(struct vnode *, struct mount *,
struct ntfs_args *, struct lwp *);
static int ntfs_vptofh(struct vnode *, struct fid *, size_t *);
static void ntfs_init(void);
static void ntfs_reinit(void);
static void ntfs_done(void);
static int ntfs_fhtovp(struct mount *, struct fid *,
struct vnode **);
static int ntfs_mountroot(void);
static const struct genfs_ops ntfs_genfsops = {
.gop_write = genfs_compat_gop_write,
};
static struct sysctllog *ntfs_sysctl_log;
static int
ntfs_mountroot()
{
struct mount *mp;
struct lwp *l = curlwp; /* XXX */
int error;
struct ntfs_args args;
if (device_class(root_device) != DV_DISK)
return (ENODEV);
if ((error = vfs_rootmountalloc(MOUNT_NTFS, "root_device", &mp))) {
vrele(rootvp);
return (error);
}
args.flag = 0;
args.uid = 0;
args.gid = 0;
args.mode = 0777;
if ((error = ntfs_mountfs(rootvp, mp, &args, l)) != 0) {
vfs_unbusy(mp, false, NULL);
vfs_destroy(mp);
return (error);
}
mutex_enter(&mountlist_lock);
CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
mutex_exit(&mountlist_lock);
(void)ntfs_statvfs(mp, &mp->mnt_stat);
vfs_unbusy(mp, false, NULL);
return (0);
}
static void
ntfs_init()
{
malloc_type_attach(M_NTFSMNT);
malloc_type_attach(M_NTFSNTNODE);
malloc_type_attach(M_NTFSFNODE);
malloc_type_attach(M_NTFSDIR);
malloc_type_attach(M_NTFSNTVATTR);
malloc_type_attach(M_NTFSRDATA);
malloc_type_attach(M_NTFSDECOMP);
malloc_type_attach(M_NTFSRUN);
ntfs_nthashinit();
ntfs_toupper_init();
}
static void
ntfs_reinit()
{
ntfs_nthashreinit();
}
static void
ntfs_done()
{
ntfs_nthashdone();
malloc_type_detach(M_NTFSMNT);
malloc_type_detach(M_NTFSNTNODE);
malloc_type_detach(M_NTFSFNODE);
malloc_type_detach(M_NTFSDIR);
malloc_type_detach(M_NTFSNTVATTR);
malloc_type_detach(M_NTFSRDATA);
malloc_type_detach(M_NTFSDECOMP);
malloc_type_detach(M_NTFSRUN);
}
static int
ntfs_mount (
struct mount *mp,
const char *path,
void *data,
size_t *data_len)
{
struct nameidata nd;
struct lwp *l = curlwp;
struct nameidata *ndp = &nd;
int err = 0, flags;
struct vnode *devvp;
struct ntfs_args *args = data;
if (*data_len < sizeof *args)
return EINVAL;
if (mp->mnt_flag & MNT_GETARGS) {
struct ntfsmount *ntmp = VFSTONTFS(mp);
if (ntmp == NULL)
return EIO;
args->fspec = NULL;
args->uid = ntmp->ntm_uid;
args->gid = ntmp->ntm_gid;
args->mode = ntmp->ntm_mode;
args->flag = ntmp->ntm_flag;
*data_len = sizeof *args;
return 0;
}
/*
***
* Mounting non-root file system or updating a file system
***
*/
/*
* If updating, check whether changing from read-only to
* read/write; if there is no device name, that's all we do.
*/
if (mp->mnt_flag & MNT_UPDATE) {
printf("ntfs_mount(): MNT_UPDATE not supported\n");
return (EINVAL);
}
/*
* Not an update, or updating the name: look up the name
* and verify that it refers to a sensible block device.
*/
NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args->fspec);
err = namei(ndp);
if (err) {
/* can't get devvp!*/
return (err);
}
devvp = ndp->ni_vp;
if (devvp->v_type != VBLK) {
err = ENOTBLK;
goto fail;
}
if (bdevsw_lookup(devvp->v_rdev) == NULL) {
err = ENXIO;
goto fail;
}
if (mp->mnt_flag & MNT_UPDATE) {
#if 0
/*
********************
* UPDATE
********************
*/
if (devvp != ntmp->um_devvp) {
err = EINVAL; /* needs translation */
goto fail;
}
/*
* Update device name only on success
*/
err = set_statvfs_info(NULL, UIO_USERSPACE, args->fspec,
UIO_USERSPACE, mp->mnt_op->vfs_name, mp, p);
if (err)
goto fail;
vrele(devvp);
#endif
} else {
/*
********************
* NEW MOUNT
********************
*/
/*
* Since this is a new mount, we want the names for
* the device and the mount point copied in. If an
* error occurs, the mountpoint is discarded by the
* upper level code.
*/
/* Save "last mounted on" info for mount point (NULL pad)*/
err = set_statvfs_info(path, UIO_USERSPACE, args->fspec,
UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l);
if (err)
goto fail;
if (mp->mnt_flag & MNT_RDONLY)
flags = FREAD;
else
flags = FREAD|FWRITE;
err = VOP_OPEN(devvp, flags, FSCRED);
if (err)
goto fail;
err = ntfs_mountfs(devvp, mp, args, l);
if (err) {
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
(void)VOP_CLOSE(devvp, flags, NOCRED);
VOP_UNLOCK(devvp, 0);
goto fail;
}
}
/*
* Initialize FS stat information in mount struct; uses both
* mp->mnt_stat.f_mntonname and mp->mnt_stat.f_mntfromname
*
* This code is common to root and non-root mounts
*/
(void)VFS_STATVFS(mp, &mp->mnt_stat);
return (err);
fail:
vrele(devvp);
return (err);
}
/*
* Common code for mount and mountroot
*/
int
ntfs_mountfs(devvp, mp, argsp, l)
struct vnode *devvp;
struct mount *mp;
struct ntfs_args *argsp;
struct lwp *l;
{
struct buf *bp;
struct ntfsmount *ntmp;
dev_t dev = devvp->v_rdev;
int error, ronly, i;
struct vnode *vp;
ntmp = NULL;
/*
* Flush out any old buffers remaining from a previous use.
*/
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
error = vinvalbuf(devvp, V_SAVE, l->l_cred, l, 0, 0);
VOP_UNLOCK(devvp, 0);
if (error)
return (error);
ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
bp = NULL;
error = bread(devvp, BBLOCK, BBSIZE, NOCRED, 0, &bp);
if (error)
goto out;
ntmp = malloc( sizeof *ntmp, M_NTFSMNT, M_WAITOK );
bzero( ntmp, sizeof *ntmp );
bcopy( bp->b_data, &ntmp->ntm_bootfile, sizeof(struct bootfile) );
brelse( bp , 0 );
bp = NULL;
if (strncmp(ntmp->ntm_bootfile.bf_sysid, NTFS_BBID, NTFS_BBIDLEN)) {
error = EINVAL;
dprintf(("ntfs_mountfs: invalid boot block\n"));
goto out;
}
{
int8_t cpr = ntmp->ntm_mftrecsz;
if( cpr > 0 )
ntmp->ntm_bpmftrec = ntmp->ntm_spc * cpr;
else
ntmp->ntm_bpmftrec = (1 << (-cpr)) / ntmp->ntm_bps;
}
dprintf(("ntfs_mountfs(): bps: %d, spc: %d, media: %x, mftrecsz: %d (%d sects)\n",
ntmp->ntm_bps,ntmp->ntm_spc,ntmp->ntm_bootfile.bf_media,
ntmp->ntm_mftrecsz,ntmp->ntm_bpmftrec));
dprintf(("ntfs_mountfs(): mftcn: 0x%x|0x%x\n",
(u_int32_t)ntmp->ntm_mftcn,(u_int32_t)ntmp->ntm_mftmirrcn));
ntmp->ntm_mountp = mp;
ntmp->ntm_dev = dev;
ntmp->ntm_devvp = devvp;
ntmp->ntm_uid = argsp->uid;
ntmp->ntm_gid = argsp->gid;
ntmp->ntm_mode = argsp->mode;
ntmp->ntm_flag = argsp->flag;
mp->mnt_data = ntmp;
/* set file name encode/decode hooks XXX utf-8 only for now */
ntmp->ntm_wget = ntfs_utf8_wget;
ntmp->ntm_wput = ntfs_utf8_wput;
ntmp->ntm_wcmp = ntfs_utf8_wcmp;
dprintf(("ntfs_mountfs(): case-%s,%s uid: %d, gid: %d, mode: %o\n",
(ntmp->ntm_flag & NTFS_MFLAG_CASEINS)?"insens.":"sens.",
(ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)?" allnames,":"",
ntmp->ntm_uid, ntmp->ntm_gid, ntmp->ntm_mode));
/*
* We read in some system nodes to do not allow
* reclaim them and to have everytime access to them.
*/
{
int pi[3] = { NTFS_MFTINO, NTFS_ROOTINO, NTFS_BITMAPINO };
for (i=0; i<3; i++) {
error = VFS_VGET(mp, pi[i], &(ntmp->ntm_sysvn[pi[i]]));
if(error)
goto out1;
ntmp->ntm_sysvn[pi[i]]->v_vflag |= VV_SYSTEM;
VREF(ntmp->ntm_sysvn[pi[i]]);
vput(ntmp->ntm_sysvn[pi[i]]);
}
}
/* read the Unicode lowercase --> uppercase translation table,
* if necessary */
if ((error = ntfs_toupper_use(mp, ntmp)))
goto out1;
/*
* Scan $BitMap and count free clusters
*/
error = ntfs_calccfree(ntmp, &ntmp->ntm_cfree);
if(error)
goto out1;
/*
* Read and translate to internal format attribute
* definition file.
*/
{
int num,j;
struct attrdef ad;
/* Open $AttrDef */
error = VFS_VGET(mp, NTFS_ATTRDEFINO, &vp );
if(error)
goto out1;
/* Count valid entries */
for(num=0;;num++) {
error = ntfs_readattr(ntmp, VTONT(vp),
NTFS_A_DATA, NULL,
num * sizeof(ad), sizeof(ad),
&ad, NULL);
if (error)
goto out1;
if (ad.ad_name[0] == 0)
break;
}
/* Alloc memory for attribute definitions */
ntmp->ntm_ad = (struct ntvattrdef *) malloc(
num * sizeof(struct ntvattrdef),
M_NTFSMNT, M_WAITOK);
ntmp->ntm_adnum = num;
/* Read them and translate */
for(i=0;i<num;i++){
error = ntfs_readattr(ntmp, VTONT(vp),
NTFS_A_DATA, NULL,
i * sizeof(ad), sizeof(ad),
&ad, NULL);
if (error)
goto out1;
j = 0;
do {
ntmp->ntm_ad[i].ad_name[j] = ad.ad_name[j];
} while(ad.ad_name[j++]);
ntmp->ntm_ad[i].ad_namelen = j - 1;
ntmp->ntm_ad[i].ad_type = ad.ad_type;
}
vput(vp);
}
mp->mnt_stat.f_fsidx.__fsid_val[0] = dev;
mp->mnt_stat.f_fsidx.__fsid_val[1] = makefstype(MOUNT_NTFS);
mp->mnt_stat.f_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0];
mp->mnt_stat.f_namemax = NTFS_MAXFILENAME;
mp->mnt_flag |= MNT_LOCAL;
devvp->v_specmountpoint = mp;
return (0);
out1:
for(i=0;i<NTFS_SYSNODESNUM;i++)
if(ntmp->ntm_sysvn[i]) vrele(ntmp->ntm_sysvn[i]);
if (vflush(mp,NULLVP,0)) {
dprintf(("ntfs_mountfs: vflush failed\n"));
}
out:
devvp->v_specmountpoint = NULL;
if (bp)
brelse(bp, 0);
if (error) {
if (ntmp) {
if (ntmp->ntm_ad)
free(ntmp->ntm_ad, M_NTFSMNT);
free(ntmp, M_NTFSMNT);
}
}
return (error);
}
static int
ntfs_start (
struct mount *mp,
int flags)
{
return (0);
}
static int
ntfs_unmount(
struct mount *mp,
int mntflags)
{
struct lwp *l = curlwp;
struct ntfsmount *ntmp;
int error, ronly = 0, flags, i;
dprintf(("ntfs_unmount: unmounting...\n"));
ntmp = VFSTONTFS(mp);
flags = 0;
if(mntflags & MNT_FORCE)
flags |= FORCECLOSE;
dprintf(("ntfs_unmount: vflushing...\n"));
error = vflush(mp,NULLVP,flags | SKIPSYSTEM);
if (error) {
dprintf(("ntfs_unmount: vflush failed: %d\n",error));
return (error);
}
/* Check if only system vnodes are rest */
for(i=0;i<NTFS_SYSNODESNUM;i++)
if((ntmp->ntm_sysvn[i]) &&
(ntmp->ntm_sysvn[i]->v_usecount > 1)) return (EBUSY);
/* Dereference all system vnodes */
for(i=0;i<NTFS_SYSNODESNUM;i++)
if(ntmp->ntm_sysvn[i]) vrele(ntmp->ntm_sysvn[i]);
/* vflush system vnodes */
error = vflush(mp,NULLVP,flags);
if (error) {
panic("ntfs_unmount: vflush failed(sysnodes): %d\n",error);
}
/* Check if the type of device node isn't VBAD before
* touching v_specinfo. If the device vnode is revoked, the
* field is NULL and touching it causes null pointer derefercence.
*/
if (ntmp->ntm_devvp->v_type != VBAD)
ntmp->ntm_devvp->v_specmountpoint = NULL;
vinvalbuf(ntmp->ntm_devvp, V_SAVE, NOCRED, l, 0, 0);
/* lock the device vnode before calling VOP_CLOSE() */
vn_lock(ntmp->ntm_devvp, LK_EXCLUSIVE | LK_RETRY);
error = VOP_CLOSE(ntmp->ntm_devvp, ronly ? FREAD : FREAD|FWRITE,
NOCRED);
KASSERT(error == 0);
VOP_UNLOCK(ntmp->ntm_devvp, 0);
vrele(ntmp->ntm_devvp);
/* free the toupper table, if this has been last mounted ntfs volume */
ntfs_toupper_unuse();
dprintf(("ntfs_umount: freeing memory...\n"));
mp->mnt_data = NULL;
mp->mnt_flag &= ~MNT_LOCAL;
free(ntmp->ntm_ad, M_NTFSMNT);
FREE(ntmp, M_NTFSMNT);
return (0);
}
static int
ntfs_root(
struct mount *mp,
struct vnode **vpp)
{
struct vnode *nvp;
int error = 0;
dprintf(("ntfs_root(): sysvn: %p\n",
VFSTONTFS(mp)->ntm_sysvn[NTFS_ROOTINO]));
error = VFS_VGET(mp, (ino_t)NTFS_ROOTINO, &nvp);
if(error) {
printf("ntfs_root: VFS_VGET failed: %d\n",error);
return (error);
}
*vpp = nvp;
return (0);
}
int
ntfs_calccfree(
struct ntfsmount *ntmp,
cn_t *cfreep)
{
struct vnode *vp;
u_int8_t *tmp;
int j, error;
cn_t cfree = 0;
size_t bmsize, i;
vp = ntmp->ntm_sysvn[NTFS_BITMAPINO];
bmsize = VTOF(vp)->f_size;
tmp = (u_int8_t *) malloc(bmsize, M_TEMP, M_WAITOK);
error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
0, bmsize, tmp, NULL);
if (error)
goto out;
for(i=0;i<bmsize;i++)
for(j=0;j<8;j++)
if(~tmp[i] & (1 << j)) cfree++;
*cfreep = cfree;
out:
free(tmp, M_TEMP);
return(error);
}
static int
ntfs_statvfs(
struct mount *mp,
struct statvfs *sbp)
{
struct ntfsmount *ntmp = VFSTONTFS(mp);
u_int64_t mftallocated;
dprintf(("ntfs_statvfs():\n"));
mftallocated = VTOF(ntmp->ntm_sysvn[NTFS_MFTINO])->f_allocated;
sbp->f_bsize = ntmp->ntm_bps;
sbp->f_frsize = sbp->f_bsize; /* XXX */
sbp->f_iosize = ntmp->ntm_bps * ntmp->ntm_spc;
sbp->f_blocks = ntmp->ntm_bootfile.bf_spv;
sbp->f_bfree = sbp->f_bavail = ntfs_cntobn(ntmp->ntm_cfree);
sbp->f_ffree = sbp->f_favail = sbp->f_bfree / ntmp->ntm_bpmftrec;
sbp->f_files = mftallocated / ntfs_bntob(ntmp->ntm_bpmftrec) +
sbp->f_ffree;
sbp->f_fresvd = sbp->f_bresvd = 0; /* XXX */
sbp->f_flag = mp->mnt_flag;
copy_statvfs_info(sbp, mp);
return (0);
}
static int
ntfs_sync (
struct mount *mp,
int waitfor,
kauth_cred_t cred)
{
/*dprintf(("ntfs_sync():\n"));*/
return (0);
}
/*ARGSUSED*/
static int
ntfs_fhtovp(
struct mount *mp,
struct fid *fhp,
struct vnode **vpp)
{
struct ntfid ntfh;
int error;
if (fhp->fid_len != sizeof(struct ntfid))
return EINVAL;
memcpy(&ntfh, fhp, sizeof(ntfh));
ddprintf(("ntfs_fhtovp(): %s: %llu\n", mp->mnt_stat.f_mntonname,
(unsigned long long)ntfh.ntfid_ino));
error = ntfs_vgetex(mp, ntfh.ntfid_ino, ntfh.ntfid_attr, NULL,
LK_EXCLUSIVE | LK_RETRY, 0, vpp);
if (error != 0) {
*vpp = NULLVP;
return (error);
}
/* XXX as unlink/rmdir/mkdir/creat are not currently possible
* with NTFS, we don't need to check anything else for now */
return (0);
}
static int
ntfs_vptofh(
struct vnode *vp,
struct fid *fhp,
size_t *fh_size)
{
struct ntnode *ntp;
struct ntfid ntfh;
struct fnode *fn;
if (*fh_size < sizeof(struct ntfid)) {
*fh_size = sizeof(struct ntfid);
return E2BIG;
}
*fh_size = sizeof(struct ntfid);
ddprintf(("ntfs_fhtovp(): %s: %p\n", vp->v_mount->mnt_stat.f_mntonname,
vp));
fn = VTOF(vp);
ntp = VTONT(vp);
memset(&ntfh, 0, sizeof(ntfh));
ntfh.ntfid_len = sizeof(struct ntfid);
ntfh.ntfid_ino = ntp->i_number;
ntfh.ntfid_attr = fn->f_attrtype;
#ifdef notyet
ntfh.ntfid_gen = ntp->i_gen;
#endif
memcpy(fhp, &ntfh, sizeof(ntfh));
return (0);
}
int
ntfs_vgetex(
struct mount *mp,
ino_t ino,
u_int32_t attrtype,
char *attrname,
u_long lkflags,
u_long flags,
struct vnode **vpp)
{
int error;
struct ntfsmount *ntmp;
struct ntnode *ip;
struct fnode *fp;
struct vnode *vp;
enum vtype f_type = VBAD;
dprintf(("ntfs_vgetex: ino: %llu, attr: 0x%x:%s, lkf: 0x%lx, f:"
" 0x%lx\n", (unsigned long long)ino, attrtype,
attrname ? attrname : "", (u_long)lkflags, (u_long)flags));
ntmp = VFSTONTFS(mp);
*vpp = NULL;
/* Get ntnode */
error = ntfs_ntlookup(ntmp, ino, &ip);
if (error) {
printf("ntfs_vget: ntfs_ntget failed\n");
return (error);
}
/* It may be not initialized fully, so force load it */
if (!(flags & VG_DONTLOADIN) && !(ip->i_flag & IN_LOADED)) {
error = ntfs_loadntnode(ntmp, ip);
if(error) {
printf("ntfs_vget: CAN'T LOAD ATTRIBUTES FOR INO:"
" %llu\n", (unsigned long long)ip->i_number);
ntfs_ntput(ip);
return (error);
}
}
error = ntfs_fget(ntmp, ip, attrtype, attrname, &fp);
if (error) {
printf("ntfs_vget: ntfs_fget failed\n");
ntfs_ntput(ip);
return (error);
}
if (!(flags & VG_DONTVALIDFN) && !(fp->f_flag & FN_VALID)) {
if ((ip->i_frflag & NTFS_FRFLAG_DIR) &&
(fp->f_attrtype == NTFS_A_DATA && fp->f_attrname == NULL)) {
f_type = VDIR;
} else if (flags & VG_EXT) {
f_type = VNON;
fp->f_size = fp->f_allocated = 0;
} else {
f_type = VREG;
error = ntfs_filesize(ntmp, fp,
&fp->f_size, &fp->f_allocated);
if (error) {
ntfs_ntput(ip);
return (error);
}
}
fp->f_flag |= FN_VALID;
}
/*
* We may be calling vget() now. To avoid potential deadlock, we need
* to release ntnode lock, since due to locking order vnode
* lock has to be acquired first.
* ntfs_fget() bumped ntnode usecount, so ntnode won't be recycled
* prematurely.
*/
ntfs_ntput(ip);
if (FTOV(fp)) {
/* vget() returns error if the vnode has been recycled */
if (vget(FTOV(fp), lkflags) == 0) {
*vpp = FTOV(fp);
return (0);
}
}
error = getnewvnode(VT_NTFS, ntmp->ntm_mountp, ntfs_vnodeop_p, &vp);
if(error) {
ntfs_frele(fp);
ntfs_ntput(ip);
return (error);
}
dprintf(("ntfs_vget: vnode: %p for ntnode: %llu\n", vp,
(unsigned long long)ino));
fp->f_vp = vp;
vp->v_data = fp;
if (f_type != VBAD)
vp->v_type = f_type;
genfs_node_init(vp, &ntfs_genfsops);
if (ino == NTFS_ROOTINO)
vp->v_vflag |= VV_ROOT;
if (lkflags & LK_TYPE_MASK) {
error = vn_lock(vp, lkflags);
if (error) {
vput(vp);
return (error);
}
}
uvm_vnp_setsize(vp, 0); /* XXX notused */
VREF(ip->i_devvp);
*vpp = vp;
return (0);
}
static int
ntfs_vget(
struct mount *mp,
ino_t ino,
struct vnode **vpp)
{
return ntfs_vgetex(mp, ino, NTFS_A_DATA, NULL,
LK_EXCLUSIVE | LK_RETRY, 0, vpp);
}
extern const struct vnodeopv_desc ntfs_vnodeop_opv_desc;
const struct vnodeopv_desc * const ntfs_vnodeopv_descs[] = {
&ntfs_vnodeop_opv_desc,
NULL,
};
struct vfsops ntfs_vfsops = {
MOUNT_NTFS,
sizeof (struct ntfs_args),
ntfs_mount,
ntfs_start,
ntfs_unmount,
ntfs_root,
(void *)eopnotsupp, /* vfs_quotactl */
ntfs_statvfs,
ntfs_sync,
ntfs_vget,
ntfs_fhtovp,
ntfs_vptofh,
ntfs_init,
ntfs_reinit,
ntfs_done,
ntfs_mountroot,
(int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp,
vfs_stdextattrctl,
(void *)eopnotsupp, /* vfs_suspendctl */
genfs_renamelock_enter,
genfs_renamelock_exit,
(void *)eopnotsupp,
ntfs_vnodeopv_descs,
0,
{ NULL, NULL },
};
static int
ntfs_modcmd(modcmd_t cmd, void *arg)
{
int error;
switch (cmd) {
case MODULE_CMD_INIT:
error = vfs_attach(&ntfs_vfsops);
if (error != 0)
break;
sysctl_createv(&ntfs_sysctl_log, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "vfs", NULL,
NULL, 0, NULL, 0,
CTL_VFS, CTL_EOL);
sysctl_createv(&ntfs_sysctl_log, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "ntfs",
SYSCTL_DESCR("NTFS file system"),
NULL, 0, NULL, 0,
CTL_VFS, 20, CTL_EOL);
/*
* XXX the "20" above could be dynamic, thereby eliminating
* one more instance of the "number to vfs" mapping problem,
* but "20" is the order as taken from sys/mount.h
*/
break;
case MODULE_CMD_FINI:
error = vfs_detach(&ntfs_vfsops);
if (error != 0)
break;
sysctl_teardown(&ntfs_sysctl_log);
break;
default:
error = ENOTTY;
break;
}
return (error);
}