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NetBSD/sys/ntfs/ntfs_vnops.c

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/* $NetBSD: ntfs_vnops.c,v 1.33 2001/06/20 09:14:59 jdolecek Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* John Heidemann of the UCLA Ficus project.
*
* 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 the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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_vnops.c,v 1.5 1999/05/12 09:43:06 semenu Exp
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/namei.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/dirent.h>
#if !defined(__NetBSD__)
#include <vm/vm.h>
#endif
#if defined(__FreeBSD__)
#include <vm/vnode_pager.h>
#endif
#include <sys/sysctl.h>
/*#define NTFS_DEBUG 1*/
#include <ntfs/ntfs.h>
#include <ntfs/ntfs_inode.h>
#include <ntfs/ntfs_subr.h>
#include <miscfs/specfs/specdev.h>
#include <miscfs/genfs/genfs.h>
#include <sys/unistd.h> /* for pathconf(2) constants */
static int ntfs_bypass __P((struct vop_generic_args *ap));
static int ntfs_read __P((struct vop_read_args *));
static int ntfs_write __P((struct vop_write_args *ap));
static int ntfs_getattr __P((struct vop_getattr_args *ap));
static int ntfs_inactive __P((struct vop_inactive_args *ap));
static int ntfs_print __P((struct vop_print_args *ap));
static int ntfs_reclaim __P((struct vop_reclaim_args *ap));
static int ntfs_strategy __P((struct vop_strategy_args *ap));
static int ntfs_access __P((struct vop_access_args *ap));
static int ntfs_open __P((struct vop_open_args *ap));
static int ntfs_close __P((struct vop_close_args *ap));
static int ntfs_readdir __P((struct vop_readdir_args *ap));
static int ntfs_lookup __P((struct vop_lookup_args *ap));
static int ntfs_bmap __P((struct vop_bmap_args *ap));
#if defined(__FreeBSD__)
static int ntfs_getpages __P((struct vop_getpages_args *ap));
static int ntfs_putpages __P((struct vop_putpages_args *));
static int ntfs_fsync __P((struct vop_fsync_args *ap));
#endif
static int ntfs_pathconf __P((void *));
int ntfs_prtactive = 1; /* 1 => print out reclaim of active vnodes */
#if defined(__FreeBSD__)
int
ntfs_getpages(ap)
struct vop_getpages_args *ap;
{
return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
ap->a_reqpage);
}
int
ntfs_putpages(ap)
struct vop_putpages_args *ap;
{
return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
ap->a_sync, ap->a_rtvals);
}
#endif
/*
* This is a noop, simply returning what one has been given.
*/
int
ntfs_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;
{
dprintf(("ntfs_bmap: vn: %p, blk: %d\n", ap->a_vp,(u_int32_t)ap->a_bn));
if (ap->a_vpp != NULL)
*ap->a_vpp = ap->a_vp;
if (ap->a_bnp != NULL)
*ap->a_bnp = ap->a_bn;
if (ap->a_runp != NULL)
*ap->a_runp = 0;
#if !defined(__NetBSD__)
if (ap->a_runb != NULL)
*ap->a_runb = 0;
#endif
return (0);
}
static int
ntfs_read(ap)
struct vop_read_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct fnode *fp = VTOF(vp);
struct ntnode *ip = FTONT(fp);
struct uio *uio = ap->a_uio;
struct ntfsmount *ntmp = ip->i_mp;
u_int64_t toread;
int error;
dprintf(("ntfs_read: ino: %d, off: %d resid: %d, segflg: %d\n",ip->i_number,(u_int32_t)uio->uio_offset,uio->uio_resid,uio->uio_segflg));
dprintf(("ntfs_read: filesize: %d",(u_int32_t)fp->f_size));
/* don't allow reading after end of file */
if (uio->uio_offset > fp->f_size)
toread = 0;
else
toread = min( uio->uio_resid, fp->f_size - uio->uio_offset );
dprintf((", toread: %d\n",(u_int32_t)toread));
if (toread == 0)
return (0);
error = ntfs_readattr(ntmp, ip, fp->f_attrtype,
fp->f_attrname, uio->uio_offset, toread, NULL, uio);
if (error) {
printf("ntfs_read: ntfs_readattr failed: %d\n",error);
return (error);
}
return (0);
}
static int
ntfs_bypass(ap)
struct vop_generic_args /* {
struct vnodeop_desc *a_desc;
<other random data follows, presumably>
} */ *ap;
{
int error = ENOTTY;
dprintf(("ntfs_bypass: %s\n", ap->a_desc->vdesc_name));
return (error);
}
static int
ntfs_getattr(ap)
struct vop_getattr_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 fnode *fp = VTOF(vp);
struct ntnode *ip = FTONT(fp);
struct vattr *vap = ap->a_vap;
dprintf(("ntfs_getattr: %d, flags: %d\n",ip->i_number,ip->i_flag));
#if defined(__FreeBSD__)
vap->va_fsid = dev2udev(ip->i_dev);
#else /* NetBSD */
vap->va_fsid = ip->i_dev;
#endif
vap->va_fileid = ip->i_number;
vap->va_mode = ip->i_mp->ntm_mode;
vap->va_nlink = ip->i_nlink;
vap->va_uid = ip->i_mp->ntm_uid;
vap->va_gid = ip->i_mp->ntm_gid;
vap->va_rdev = 0; /* XXX UNODEV ? */
vap->va_size = fp->f_size;
vap->va_bytes = fp->f_allocated;
vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access);
vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write);
vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create);
vap->va_flags = ip->i_flag;
vap->va_gen = 0;
vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps;
vap->va_type = vp->v_type;
vap->va_filerev = 0;
return (0);
}
/*
* Last reference to an ntnode. If necessary, write or delete it.
*/
int
ntfs_inactive(ap)
struct vop_inactive_args /* {
struct vnode *a_vp;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
#ifdef NTFS_DEBUG
struct ntnode *ip = VTONT(vp);
#endif
dprintf(("ntfs_inactive: vnode: %p, ntnode: %d\n", vp, ip->i_number));
if (ntfs_prtactive && vp->v_usecount != 0)
vprint("ntfs_inactive: pushing active", vp);
VOP__UNLOCK(vp, 0, ap->a_p);
/* XXX since we don't support any filesystem changes
* right now, nothing more needs to be done
*/
return (0);
}
/*
* Reclaim an fnode/ntnode so that it can be used for other purposes.
*/
int
ntfs_reclaim(ap)
struct vop_reclaim_args /* {
struct vnode *a_vp;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct fnode *fp = VTOF(vp);
struct ntnode *ip = FTONT(fp);
int error;
dprintf(("ntfs_reclaim: vnode: %p, ntnode: %d\n", vp, ip->i_number));
if (ntfs_prtactive && vp->v_usecount != 0)
vprint("ntfs_reclaim: pushing active", vp);
if ((error = ntfs_ntget(ip)) != 0)
return (error);
/* Purge old data structures associated with the inode. */
cache_purge(vp);
if (ip->i_devvp) {
vrele(ip->i_devvp);
ip->i_devvp = NULL;
}
ntfs_frele(fp);
ntfs_ntput(ip);
vp->v_data = NULL;
return (0);
}
static int
ntfs_print(ap)
struct vop_print_args /* {
struct vnode *a_vp;
} */ *ap;
{
return (0);
}
/*
* Calculate the logical to physical mapping if not done already,
* then call the device strategy routine.
*/
int
ntfs_strategy(ap)
struct vop_strategy_args /* {
struct buf *a_bp;
} */ *ap;
{
struct buf *bp = ap->a_bp;
struct vnode *vp = bp->b_vp;
struct fnode *fp = VTOF(vp);
struct ntnode *ip = FTONT(fp);
struct ntfsmount *ntmp = ip->i_mp;
int error;
#ifdef __FreeBSD__
dprintf(("ntfs_strategy: offset: %d, blkno: %d, lblkno: %d\n",
(u_int32_t)bp->b_offset,(u_int32_t)bp->b_blkno,
(u_int32_t)bp->b_lblkno));
#else
dprintf(("ntfs_strategy: blkno: %d, lblkno: %d\n",
(u_int32_t)bp->b_blkno,
(u_int32_t)bp->b_lblkno));
#endif
dprintf(("strategy: bcount: %d flags: 0x%lx\n",
(u_int32_t)bp->b_bcount,bp->b_flags));
if (bp->b_flags & B_READ) {
u_int32_t toread;
if (ntfs_cntob(bp->b_blkno) >= fp->f_size) {
clrbuf(bp);
error = 0;
} else {
toread = min(bp->b_bcount,
fp->f_size-ntfs_cntob(bp->b_blkno));
dprintf(("ntfs_strategy: toread: %d, fsize: %d\n",
toread,(u_int32_t)fp->f_size));
error = ntfs_readattr(ntmp, ip, fp->f_attrtype,
fp->f_attrname, ntfs_cntob(bp->b_blkno),
toread, bp->b_data, NULL);
if (error) {
printf("ntfs_strategy: ntfs_readattr failed\n");
bp->b_error = error;
bp->b_flags |= B_ERROR;
}
bzero(bp->b_data + toread, bp->b_bcount - toread);
}
} else {
size_t tmp;
u_int32_t towrite;
if (ntfs_cntob(bp->b_blkno) + bp->b_bcount >= fp->f_size) {
printf("ntfs_strategy: CAN'T EXTEND FILE\n");
bp->b_error = error = EFBIG;
bp->b_flags |= B_ERROR;
} else {
towrite = min(bp->b_bcount,
fp->f_size-ntfs_cntob(bp->b_blkno));
dprintf(("ntfs_strategy: towrite: %d, fsize: %d\n",
towrite,(u_int32_t)fp->f_size));
error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
fp->f_attrname, ntfs_cntob(bp->b_blkno),towrite,
bp->b_data, &tmp, NULL);
if (error) {
printf("ntfs_strategy: ntfs_writeattr fail\n");
bp->b_error = error;
bp->b_flags |= B_ERROR;
}
}
}
biodone(bp);
return (error);
}
static int
ntfs_write(ap)
struct vop_write_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct fnode *fp = VTOF(vp);
struct ntnode *ip = FTONT(fp);
struct uio *uio = ap->a_uio;
struct ntfsmount *ntmp = ip->i_mp;
u_int64_t towrite;
size_t written;
int error;
dprintf(("ntfs_write: ino: %d, off: %d resid: %d, segflg: %d\n",ip->i_number,(u_int32_t)uio->uio_offset,uio->uio_resid,uio->uio_segflg));
dprintf(("ntfs_write: filesize: %d",(u_int32_t)fp->f_size));
if (uio->uio_resid + uio->uio_offset > fp->f_size) {
printf("ntfs_write: CAN'T WRITE BEYOND END OF FILE\n");
return (EFBIG);
}
towrite = min(uio->uio_resid, fp->f_size - uio->uio_offset);
dprintf((", towrite: %d\n",(u_int32_t)towrite));
error = ntfs_writeattr_plain(ntmp, ip, fp->f_attrtype,
fp->f_attrname, uio->uio_offset, towrite, NULL, &written, uio);
#ifdef NTFS_DEBUG
if (error)
printf("ntfs_write: ntfs_writeattr failed: %d\n", error);
#endif
return (error);
}
int
ntfs_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 ntnode *ip = VTONT(vp);
struct ucred *cred = ap->a_cred;
mode_t mask, mode = ap->a_mode;
gid_t *gp;
int i;
#ifdef QUOTA
int error;
#endif
dprintf(("ntfs_access: %d\n",ip->i_number));
/*
* 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 ((int)vp->v_type) {
case VDIR:
case VLNK:
case VREG:
if (vp->v_mount->mnt_flag & MNT_RDONLY)
return (EROFS);
#ifdef QUOTA
if (error = getinoquota(ip))
return (error);
#endif
break;
}
}
/* Otherwise, user id 0 always gets access. */
if (cred->cr_uid == 0)
return (0);
mask = 0;
/* Otherwise, check the owner. */
if (cred->cr_uid == ip->i_mp->ntm_uid) {
if (mode & VEXEC)
mask |= S_IXUSR;
if (mode & VREAD)
mask |= S_IRUSR;
if (mode & VWRITE)
mask |= S_IWUSR;
return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
}
/* Otherwise, check the groups. */
for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
if (ip->i_mp->ntm_gid == *gp) {
if (mode & VEXEC)
mask |= S_IXGRP;
if (mode & VREAD)
mask |= S_IRGRP;
if (mode & VWRITE)
mask |= S_IWGRP;
return ((ip->i_mp->ntm_mode&mask) == mask ? 0 : EACCES);
}
/* Otherwise, check everyone else. */
if (mode & VEXEC)
mask |= S_IXOTH;
if (mode & VREAD)
mask |= S_IROTH;
if (mode & VWRITE)
mask |= S_IWOTH;
return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
}
/*
* Open called.
*
* Nothing to do.
*/
/* ARGSUSED */
static int
ntfs_open(ap)
struct vop_open_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
#if NTFS_DEBUG
struct vnode *vp = ap->a_vp;
struct ntnode *ip = VTONT(vp);
printf("ntfs_open: %d\n",ip->i_number);
#endif
/*
* Files marked append-only must be opened for appending.
*/
return (0);
}
/*
* Close called.
*
* Update the times on the inode.
*/
/* ARGSUSED */
static int
ntfs_close(ap)
struct vop_close_args /* {
struct vnode *a_vp;
int a_fflag;
struct ucred *a_cred;
struct proc *a_p;
} */ *ap;
{
#if NTFS_DEBUG
struct vnode *vp = ap->a_vp;
struct ntnode *ip = VTONT(vp);
printf("ntfs_close: %d\n",ip->i_number);
#endif
return (0);
}
int
ntfs_readdir(ap)
struct vop_readdir_args /* {
struct vnode *a_vp;
struct uio *a_uio;
struct ucred *a_cred;
int *a_ncookies;
u_int **cookies;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct fnode *fp = VTOF(vp);
struct ntnode *ip = FTONT(fp);
struct uio *uio = ap->a_uio;
struct ntfsmount *ntmp = ip->i_mp;
int i, error = 0;
u_int32_t faked = 0, num;
int ncookies = 0;
struct dirent cde;
off_t off;
dprintf(("ntfs_readdir %d off: %d resid: %d\n",ip->i_number,(u_int32_t)uio->uio_offset,uio->uio_resid));
off = uio->uio_offset;
/* Simulate . in every dir except ROOT */
if( ip->i_number != NTFS_ROOTINO ) {
struct dirent dot = { NTFS_ROOTINO,
sizeof(struct dirent), DT_DIR, 1, "." };
if( uio->uio_offset < sizeof(struct dirent) ) {
dot.d_fileno = ip->i_number;
error = uiomove((char *)&dot,sizeof(struct dirent),uio);
if(error)
return (error);
ncookies ++;
}
}
/* Simulate .. in every dir including ROOT */
if( uio->uio_offset < 2 * sizeof(struct dirent) ) {
struct dirent dotdot = { NTFS_ROOTINO,
sizeof(struct dirent), DT_DIR, 2, ".." };
error = uiomove((char *)&dotdot,sizeof(struct dirent),uio);
if(error)
return (error);
ncookies ++;
}
faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2;
num = uio->uio_offset / sizeof(struct dirent) - faked;
while( uio->uio_resid >= sizeof(struct dirent) ) {
struct attr_indexentry *iep;
char *fname;
size_t remains;
int sz;
error = ntfs_ntreaddir(ntmp, fp, num, &iep);
if(error)
return (error);
if( NULL == iep )
break;
for(; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (uio->uio_resid >= sizeof(struct dirent));
iep = NTFS_NEXTREC(iep, struct attr_indexentry *))
{
if(!ntfs_isnamepermitted(ntmp,iep))
continue;
remains = sizeof(cde.d_name) - 1;
fname = cde.d_name;
for(i=0; i<iep->ie_fnamelen; i++) {
sz = (*ntmp->ntm_wput)(fname, remains,
iep->ie_fname[i]);
fname += sz;
remains -= sz;
}
*fname = '\0';
dprintf(("ntfs_readdir: elem: %d, fname:[%s] type: %d, flag: %d, ",
num, cde.d_name, iep->ie_fnametype,
iep->ie_flag));
cde.d_namlen = fname - (char *) cde.d_name;
cde.d_fileno = iep->ie_number;
cde.d_type = (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG;
cde.d_reclen = sizeof(struct dirent);
dprintf(("%s\n", (cde.d_type == DT_DIR) ? "dir":"reg"));
error = uiomove((char *)&cde, sizeof(struct dirent), uio);
if(error)
return (error);
ncookies++;
num++;
}
}
dprintf(("ntfs_readdir: %d entries (%d bytes) read\n",
ncookies,(u_int)(uio->uio_offset - off)));
dprintf(("ntfs_readdir: off: %d resid: %d\n",
(u_int32_t)uio->uio_offset,uio->uio_resid));
if (!error && ap->a_ncookies != NULL) {
struct dirent* dpStart;
struct dirent* dp;
#if defined(__FreeBSD__)
u_long *cookies;
u_long *cookiep;
#else /* defined(__NetBSD__) */
off_t *cookies;
off_t *cookiep;
#endif
printf("ntfs_readdir: %d cookies\n",ncookies);
if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
panic("ntfs_readdir: unexpected uio from NFS server");
dpStart = (struct dirent *)
((caddr_t)uio->uio_iov->iov_base -
(uio->uio_offset - off));
#if defined(__FreeBSD__)
MALLOC(cookies, u_long *, ncookies * sizeof(u_long),
M_TEMP, M_WAITOK);
#else /* defined(__NetBSD__) */
cookies = malloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
#endif
for (dp = dpStart, cookiep = cookies, i=0;
i < ncookies;
dp = (struct dirent *)((caddr_t) dp + dp->d_reclen), i++) {
off += dp->d_reclen;
*cookiep++ = (u_int) off;
}
*ap->a_ncookies = ncookies;
*ap->a_cookies = cookies;
}
/*
if (ap->a_eofflag)
*ap->a_eofflag = VTONT(ap->a_vp)->i_size <= uio->uio_offset;
*/
return (error);
}
int
ntfs_lookup(ap)
struct vop_lookup_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
} */ *ap;
{
struct vnode *dvp = ap->a_dvp;
struct ntnode *dip = VTONT(dvp);
struct ntfsmount *ntmp = dip->i_mp;
struct componentname *cnp = ap->a_cnp;
struct ucred *cred = cnp->cn_cred;
int error;
int lockparent = cnp->cn_flags & LOCKPARENT;
#if NTFS_DEBUG
int wantparent = cnp->cn_flags & (LOCKPARENT|WANTPARENT);
#endif
dprintf(("ntfs_lookup: \"%.*s\" (%ld bytes) in %d, lp: %d, wp: %d \n",
(int)cnp->cn_namelen, cnp->cn_nameptr, cnp->cn_namelen,
dip->i_number, lockparent, wantparent));
error = VOP_ACCESS(dvp, VEXEC, cred, cnp->cn_proc);
if(error)
return (error);
if ((cnp->cn_flags & ISLASTCN) &&
(dvp->v_mount->mnt_flag & MNT_RDONLY) &&
(cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
return (EROFS);
#ifdef __NetBSD__
/*
* We now have a segment name to search for, and a directory
* to search.
*
* Before tediously performing a linear scan of the directory,
* check the name cache to see if the directory/name pair
* we are looking for is known already.
*/
if ((error = cache_lookup(ap->a_dvp, ap->a_vpp, cnp)) >= 0)
return (error);
#endif
if(cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
dprintf(("ntfs_lookup: faking . directory in %d\n",
dip->i_number));
VREF(dvp);
*ap->a_vpp = dvp;
error = 0;
} else if (cnp->cn_flags & ISDOTDOT) {
struct ntvattr *vap;
dprintf(("ntfs_lookup: faking .. directory in %d\n",
dip->i_number));
error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap);
if(error)
return (error);
VOP__UNLOCK(dvp,0,cnp->cn_proc);
cnp->cn_flags |= PDIRUNLOCK;
dprintf(("ntfs_lookup: parentdir: %d\n",
vap->va_a_name->n_pnumber));
error = VFS_VGET(ntmp->ntm_mountp,
vap->va_a_name->n_pnumber,ap->a_vpp);
ntfs_ntvattrrele(vap);
if (error) {
if (VN_LOCK(dvp,LK_EXCLUSIVE|LK_RETRY,cnp->cn_proc)==0)
cnp->cn_flags &= ~PDIRUNLOCK;
return (error);
}
if (lockparent && (cnp->cn_flags & ISLASTCN)) {
error = VN_LOCK(dvp, LK_EXCLUSIVE, cnp->cn_proc);
if (error) {
vput( *(ap->a_vpp) );
return (error);
}
cnp->cn_flags &= ~PDIRUNLOCK;
}
} else {
error = ntfs_ntlookupfile(ntmp, dvp, cnp, ap->a_vpp);
if (error) {
dprintf(("ntfs_ntlookupfile: returned %d\n", error));
return (error);
}
dprintf(("ntfs_lookup: found ino: %d\n",
VTONT(*ap->a_vpp)->i_number));
if(!lockparent || !(cnp->cn_flags & ISLASTCN))
VOP__UNLOCK(dvp, 0, cnp->cn_proc);
}
if (cnp->cn_flags & MAKEENTRY)
cache_enter(dvp, *ap->a_vpp, cnp);
return (error);
}
#if defined(__FreeBSD__)
/*
* 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
ntfs_fsync(ap)
struct vop_fsync_args /* {
struct vnode *a_vp;
struct ucred *a_cred;
int a_waitfor;
off_t offlo;
off_t offhi;
struct proc *a_p;
} */ *ap;
{
return (0);
}
#endif
/*
* Return POSIX pathconf information applicable to NTFS filesystem
*/
int
ntfs_pathconf(v)
void *v;
{
struct vop_pathconf_args /* {
struct vnode *a_vp;
int a_name;
register_t *a_retval;
} */ *ap = v;
switch (ap->a_name) {
case _PC_LINK_MAX:
*ap->a_retval = 1;
return (0);
case _PC_NAME_MAX:
*ap->a_retval = NTFS_MAXFILENAME;
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);
case _PC_SYNC_IO:
*ap->a_retval = 1;
return (0);
case _PC_FILESIZEBITS:
*ap->a_retval = 64;
return (0);
default:
return (EINVAL);
}
/* NOTREACHED */
}
/*
* Global vfs data structures
*/
vop_t **ntfs_vnodeop_p;
#if defined(__FreeBSD__)
static
struct vnodeopv_entry_desc ntfs_vnodeop_entries[] = {
{ &vop_default_desc, (vop_t *)ntfs_bypass },
{ &vop_getattr_desc, (vop_t *)ntfs_getattr },
{ &vop_inactive_desc, (vop_t *)ntfs_inactive },
{ &vop_reclaim_desc, (vop_t *)ntfs_reclaim },
{ &vop_print_desc, (vop_t *)ntfs_print },
{ &vop_pathconf_desc, ntfs_pathconf },
{ &vop_islocked_desc, (vop_t *)vop_stdislocked },
{ &vop_unlock_desc, (vop_t *)vop_stdunlock },
{ &vop_lock_desc, (vop_t *)vop_stdlock },
{ &vop_cachedlookup_desc, (vop_t *)ntfs_lookup },
{ &vop_lookup_desc, (vop_t *)vfs_cache_lookup },
{ &vop_access_desc, (vop_t *)ntfs_access },
{ &vop_close_desc, (vop_t *)ntfs_close },
{ &vop_open_desc, (vop_t *)ntfs_open },
{ &vop_readdir_desc, (vop_t *)ntfs_readdir },
{ &vop_fsync_desc, (vop_t *)ntfs_fsync },
{ &vop_bmap_desc, (vop_t *)ntfs_bmap },
{ &vop_getpages_desc, (vop_t *) ntfs_getpages },
{ &vop_putpages_desc, (vop_t *) ntfs_putpages },
{ &vop_strategy_desc, (vop_t *)ntfs_strategy },
{ &vop_bwrite_desc, (vop_t *)vop_stdbwrite },
{ &vop_read_desc, (vop_t *)ntfs_read },
{ &vop_write_desc, (vop_t *)ntfs_write },
{ NULL, NULL }
};
static
struct vnodeopv_desc ntfs_vnodeop_opv_desc =
{ &ntfs_vnodeop_p, ntfs_vnodeop_entries };
VNODEOP_SET(ntfs_vnodeop_opv_desc);
#else /* !FreeBSD */
const struct vnodeopv_entry_desc ntfs_vnodeop_entries[] = {
{ &vop_default_desc, (vop_t *) ntfs_bypass },
{ &vop_lookup_desc, (vop_t *) ntfs_lookup }, /* lookup */
{ &vop_create_desc, genfs_eopnotsupp }, /* create */
{ &vop_mknod_desc, genfs_eopnotsupp }, /* mknod */
{ &vop_open_desc, (vop_t *) ntfs_open }, /* open */
{ &vop_close_desc,(vop_t *) ntfs_close }, /* close */
{ &vop_access_desc, (vop_t *) ntfs_access }, /* access */
{ &vop_getattr_desc, (vop_t *) ntfs_getattr }, /* getattr */
{ &vop_setattr_desc, genfs_eopnotsupp }, /* setattr */
{ &vop_read_desc, (vop_t *) ntfs_read }, /* read */
{ &vop_write_desc, (vop_t *) ntfs_write }, /* write */
{ &vop_lease_desc, genfs_lease_check }, /* lease */
{ &vop_fcntl_desc, genfs_fcntl }, /* fcntl */
{ &vop_ioctl_desc, genfs_enoioctl }, /* ioctl */
{ &vop_poll_desc, genfs_poll }, /* poll */
{ &vop_revoke_desc, genfs_revoke }, /* revoke */
{ &vop_mmap_desc, genfs_eopnotsupp }, /* mmap */
{ &vop_fsync_desc, genfs_fsync }, /* fsync */
{ &vop_seek_desc, genfs_seek }, /* seek */
{ &vop_remove_desc, genfs_eopnotsupp }, /* remove */
{ &vop_link_desc, genfs_eopnotsupp }, /* link */
{ &vop_rename_desc, genfs_eopnotsupp }, /* rename */
{ &vop_mkdir_desc, genfs_eopnotsupp }, /* mkdir */
{ &vop_rmdir_desc, genfs_eopnotsupp }, /* rmdir */
{ &vop_symlink_desc, genfs_eopnotsupp }, /* symlink */
{ &vop_readdir_desc, (vop_t *) ntfs_readdir }, /* readdir */
{ &vop_readlink_desc, genfs_eopnotsupp }, /* readlink */
{ &vop_abortop_desc, genfs_abortop }, /* abortop */
{ &vop_inactive_desc, (vop_t *) ntfs_inactive }, /* inactive */
{ &vop_reclaim_desc, (vop_t *) ntfs_reclaim }, /* reclaim */
{ &vop_lock_desc, genfs_lock }, /* lock */
{ &vop_unlock_desc, genfs_unlock }, /* unlock */
{ &vop_bmap_desc, (vop_t *) ntfs_bmap }, /* bmap */
{ &vop_strategy_desc, (vop_t *) ntfs_strategy }, /* strategy */
{ &vop_print_desc, (vop_t *) ntfs_print }, /* print */
{ &vop_islocked_desc, genfs_islocked }, /* islocked */
{ &vop_pathconf_desc, ntfs_pathconf }, /* pathconf */
{ &vop_advlock_desc, genfs_nullop }, /* advlock */
{ &vop_blkatoff_desc, genfs_eopnotsupp }, /* blkatoff */
{ &vop_valloc_desc, genfs_eopnotsupp }, /* valloc */
{ &vop_reallocblks_desc, genfs_eopnotsupp }, /* reallocblks */
{ &vop_vfree_desc, genfs_eopnotsupp }, /* vfree */
{ &vop_truncate_desc, genfs_eopnotsupp }, /* truncate */
{ &vop_update_desc, genfs_eopnotsupp }, /* update */
{ &vop_bwrite_desc, vn_bwrite }, /* bwrite */
{ (struct vnodeop_desc *)NULL, (int (*) __P((void *)))NULL }
};
const struct vnodeopv_desc ntfs_vnodeop_opv_desc =
{ &ntfs_vnodeop_p, ntfs_vnodeop_entries };
#endif
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