702 lines
17 KiB
C
702 lines
17 KiB
C
/* $OpenBSD: ntfs_vnops.c,v 1.49 2024/05/13 11:17:40 semarie Exp $ */
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/* $NetBSD: ntfs_vnops.c,v 1.6 2003/04/10 21:57:26 jdolecek Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* John Heidemann of the UCLA Ficus project.
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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. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Id: ntfs_vnops.c,v 1.5 1999/05/12 09:43:06 semenu Exp
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*
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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/time.h>
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#include <sys/stat.h>
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#include <sys/vnode.h>
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#include <sys/lock.h>
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#include <sys/mount.h>
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#include <sys/namei.h>
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#include <sys/malloc.h>
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#include <sys/buf.h>
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#include <sys/dirent.h>
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#include <sys/specdev.h>
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/*#define NTFS_DEBUG 1*/
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#include <ntfs/ntfs.h>
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#include <ntfs/ntfs_inode.h>
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#include <ntfs/ntfs_subr.h>
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#include <sys/unistd.h> /* for pathconf(2) constants */
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int ntfs_read(void *);
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int ntfs_getattr(void *);
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int ntfs_inactive(void *);
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int ntfs_print(void *);
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int ntfs_reclaim(void *);
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int ntfs_strategy(void *);
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int ntfs_access(void *v);
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int ntfs_open(void *v);
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int ntfs_close(void *);
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int ntfs_readdir(void *);
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int ntfs_lookup(void *);
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int ntfs_bmap(void *);
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int ntfs_fsync(void *);
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int ntfs_pathconf(void *);
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int ntfs_prtactive = 0; /* 1 => print out reclaim of active vnodes */
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/*
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* This is a noop, simply returning what one has been given.
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*/
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int
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ntfs_bmap(void *v)
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{
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struct vop_bmap_args *ap = v;
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DPRINTF("ntfs_bmap: vn: %p, blk: %lld\n",
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ap->a_vp, (long long)ap->a_bn);
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if (ap->a_vpp != NULL)
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*ap->a_vpp = ap->a_vp;
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if (ap->a_bnp != NULL)
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*ap->a_bnp = ap->a_bn;
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if (ap->a_runp != NULL)
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*ap->a_runp = 0;
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return (0);
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}
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int
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ntfs_read(void *v)
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{
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struct vop_read_args *ap = v;
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struct vnode *vp = ap->a_vp;
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struct fnode *fp = VTOF(vp);
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struct ntnode *ip = FTONT(fp);
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struct uio *uio = ap->a_uio;
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struct ntfsmount *ntmp = ip->i_mp;
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u_int64_t toread;
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int error;
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DPRINTF("ntfs_read: ino: %u, off: %lld resid: %zu, segflg: %d\n",
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ip->i_number, uio->uio_offset, uio->uio_resid, uio->uio_segflg);
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DPRINTF("ntfs_read: filesize: %llu", fp->f_size);
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/* don't allow reading after end of file */
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if (uio->uio_offset > fp->f_size)
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toread = 0;
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else
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toread = MIN(uio->uio_resid, fp->f_size - uio->uio_offset);
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DPRINTF(", toread: %llu\n", toread);
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if (toread == 0)
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return (0);
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error = ntfs_readattr(ntmp, ip, fp->f_attrtype,
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fp->f_attrname, uio->uio_offset, toread, NULL, uio);
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if (error) {
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printf("ntfs_read: ntfs_readattr failed: %d\n",error);
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return (error);
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}
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return (0);
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}
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int
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ntfs_getattr(void *v)
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{
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struct vop_getattr_args *ap = v;
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struct vnode *vp = ap->a_vp;
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struct fnode *fp = VTOF(vp);
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struct ntnode *ip = FTONT(fp);
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struct vattr *vap = ap->a_vap;
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DPRINTF("ntfs_getattr: %u, flags: %u\n", ip->i_number, ip->i_flag);
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vap->va_fsid = ip->i_dev;
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vap->va_fileid = ip->i_number;
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vap->va_mode = ip->i_mp->ntm_mode;
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vap->va_nlink = ip->i_nlink;
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vap->va_uid = ip->i_mp->ntm_uid;
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vap->va_gid = ip->i_mp->ntm_gid;
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vap->va_rdev = 0; /* XXX UNODEV ? */
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vap->va_size = fp->f_size;
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vap->va_bytes = fp->f_allocated;
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vap->va_atime = ntfs_nttimetounix(fp->f_times.t_access);
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vap->va_mtime = ntfs_nttimetounix(fp->f_times.t_write);
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vap->va_ctime = ntfs_nttimetounix(fp->f_times.t_create);
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vap->va_flags = ip->i_flag;
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vap->va_gen = 0;
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vap->va_blocksize = ip->i_mp->ntm_spc * ip->i_mp->ntm_bps;
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vap->va_type = vp->v_type;
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vap->va_filerev = 0;
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/*
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* Ensure that a directory link count is always 1 so that things
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* like fts_read() do not try to be smart and end up skipping over
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* directories. Additionally, ip->i_nlink will not be initialised
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* until the ntnode has been loaded for the file.
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*/
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if (vp->v_type == VDIR || ip->i_nlink < 1)
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vap->va_nlink = 1;
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return (0);
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}
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/*
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* Last reference to an ntnode. If necessary, write or delete it.
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*/
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int
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ntfs_inactive(void *v)
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{
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struct vop_inactive_args *ap = v;
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struct vnode *vp = ap->a_vp;
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#ifdef NTFS_DEBUG
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struct ntnode *ip = VTONT(vp);
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#endif
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DPRINTF("ntfs_inactive: vnode: %p, ntnode: %u\n", vp, ip->i_number);
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#ifdef DIAGNOSTIC
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if (ntfs_prtactive && vp->v_usecount != 0)
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vprint("ntfs_inactive: pushing active", vp);
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#endif
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VOP_UNLOCK(vp);
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/* XXX since we don't support any filesystem changes
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* right now, nothing more needs to be done
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*/
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return (0);
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}
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/*
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* Reclaim an fnode/ntnode so that it can be used for other purposes.
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*/
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int
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ntfs_reclaim(void *v)
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{
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struct vop_reclaim_args *ap = v;
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struct vnode *vp = ap->a_vp;
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struct fnode *fp = VTOF(vp);
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struct ntnode *ip = FTONT(fp);
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int error;
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DPRINTF("ntfs_reclaim: vnode: %p, ntnode: %u\n", vp, ip->i_number);
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#ifdef DIAGNOSTIC
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if (ntfs_prtactive && vp->v_usecount != 0)
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vprint("ntfs_reclaim: pushing active", vp);
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#endif
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if ((error = ntfs_ntget(ip)) != 0)
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return (error);
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/* Purge old data structures associated with the inode. */
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cache_purge(vp);
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ntfs_frele(fp);
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ntfs_ntput(ip);
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vp->v_data = NULL;
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return (0);
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}
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int
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ntfs_print(void *v)
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{
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struct vop_print_args *ap = v;
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struct ntnode *ip = VTONT(ap->a_vp);
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printf("tag VT_NTFS, ino %u, flag %#x, usecount %d, nlink %ld\n",
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ip->i_number, ip->i_flag, ip->i_usecount, ip->i_nlink);
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return (0);
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}
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/*
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* Calculate the logical to physical mapping if not done already,
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* then call the device strategy routine.
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*/
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int
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ntfs_strategy(void *v)
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{
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struct vop_strategy_args *ap = v;
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struct buf *bp = ap->a_bp;
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struct vnode *vp = bp->b_vp;
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struct fnode *fp = VTOF(vp);
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struct ntnode *ip = FTONT(fp);
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struct ntfsmount *ntmp = ip->i_mp;
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int error, s;
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DPRINTF("ntfs_strategy: blkno: %lld, lblkno: %lld\n",
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(long long)bp->b_blkno, (long long)bp->b_lblkno);
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DPRINTF("strategy: bcount: %ld flags: 0x%lx\n",
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bp->b_bcount, bp->b_flags);
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if (bp->b_flags & B_READ) {
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u_int32_t toread;
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if (ntfs_cntob(bp->b_blkno) >= fp->f_size) {
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clrbuf(bp);
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error = 0;
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} else {
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toread = MIN(bp->b_bcount,
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fp->f_size - ntfs_cntob(bp->b_blkno));
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DPRINTF("ntfs_strategy: toread: %u, fsize: %llu\n",
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toread, fp->f_size);
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error = ntfs_readattr(ntmp, ip, fp->f_attrtype,
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fp->f_attrname, ntfs_cntob(bp->b_blkno),
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toread, bp->b_data, NULL);
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if (error) {
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printf("ntfs_strategy: ntfs_readattr failed\n");
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bp->b_error = error;
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bp->b_flags |= B_ERROR;
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}
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bzero(bp->b_data + toread, bp->b_bcount - toread);
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}
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} else {
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bp->b_error = error = EROFS;
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bp->b_flags |= B_ERROR;
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}
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s = splbio();
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biodone(bp);
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splx(s);
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return (error);
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}
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int
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ntfs_access(void *v)
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{
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struct vop_access_args *ap = v;
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struct vnode *vp = ap->a_vp;
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struct ntnode *ip = VTONT(vp);
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struct ucred *cred = ap->a_cred;
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mode_t mask, mode = ap->a_mode;
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gid_t *gp;
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int i;
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DPRINTF("ntfs_access: %u\n", ip->i_number);
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/*
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* Disallow write attempts unless the file is a socket, fifo, or
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* a block or character device resident on the file system.
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*/
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if (mode & VWRITE) {
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switch ((int)vp->v_type) {
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case VDIR:
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case VLNK:
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case VREG:
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return (EROFS);
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}
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}
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/* Otherwise, user id 0 always gets access. */
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if (cred->cr_uid == 0)
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return (0);
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mask = 0;
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/* Otherwise, check the owner. */
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if (cred->cr_uid == ip->i_mp->ntm_uid) {
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if (mode & VEXEC)
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mask |= S_IXUSR;
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if (mode & VREAD)
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mask |= S_IRUSR;
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if (mode & VWRITE)
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mask |= S_IWUSR;
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return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
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}
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/* Otherwise, check the groups. */
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for (i = 0, gp = cred->cr_groups; i < cred->cr_ngroups; i++, gp++)
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if (ip->i_mp->ntm_gid == *gp) {
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if (mode & VEXEC)
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mask |= S_IXGRP;
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if (mode & VREAD)
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mask |= S_IRGRP;
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if (mode & VWRITE)
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mask |= S_IWGRP;
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return ((ip->i_mp->ntm_mode&mask) == mask ? 0 : EACCES);
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}
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/* Otherwise, check everyone else. */
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if (mode & VEXEC)
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mask |= S_IXOTH;
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if (mode & VREAD)
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mask |= S_IROTH;
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if (mode & VWRITE)
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mask |= S_IWOTH;
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return ((ip->i_mp->ntm_mode & mask) == mask ? 0 : EACCES);
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}
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/*
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* Open called.
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*
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* Nothing to do.
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*/
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int
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ntfs_open(void *v)
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{
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#if NTFS_DEBUG
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struct vop_open_args *ap = v;
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struct vnode *vp = ap->a_vp;
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struct ntnode *ip = VTONT(vp);
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printf("ntfs_open: %d\n",ip->i_number);
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#endif
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/*
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* Files marked append-only must be opened for appending.
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*/
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return (0);
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}
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/*
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* Close called.
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*
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* Update the times on the inode.
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*/
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int
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ntfs_close(void *v)
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{
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#if NTFS_DEBUG
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struct vop_close_args *ap = v;
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struct vnode *vp = ap->a_vp;
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struct ntnode *ip = VTONT(vp);
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printf("ntfs_close: %d\n",ip->i_number);
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#endif
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return (0);
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}
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int
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ntfs_readdir(void *v)
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{
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struct vop_readdir_args *ap = v;
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struct vnode *vp = ap->a_vp;
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struct fnode *fp = VTOF(vp);
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struct ntnode *ip = FTONT(fp);
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struct uio *uio = ap->a_uio;
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struct ntfsmount *ntmp = ip->i_mp;
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int i, error = 0;
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u_int32_t faked = 0, num;
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struct dirent cde;
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off_t off;
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DPRINTF("ntfs_readdir %u off: %lld resid: %zu\n", ip->i_number,
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uio->uio_offset, uio->uio_resid);
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off = uio->uio_offset;
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memset(&cde, 0, sizeof(cde));
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/* Simulate . in every dir except ROOT */
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if (ip->i_number != NTFS_ROOTINO && uio->uio_offset == 0) {
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cde.d_fileno = ip->i_number;
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cde.d_reclen = sizeof(struct dirent);
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cde.d_type = DT_DIR;
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cde.d_namlen = 1;
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cde.d_off = sizeof(struct dirent);
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cde.d_name[0] = '.';
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cde.d_name[1] = '\0';
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error = uiomove(&cde, sizeof(struct dirent), uio);
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if (error)
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goto out;
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}
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/* Simulate .. in every dir including ROOT */
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if (uio->uio_offset < 2 * sizeof(struct dirent)) {
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cde.d_fileno = NTFS_ROOTINO; /* XXX */
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cde.d_reclen = sizeof(struct dirent);
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cde.d_type = DT_DIR;
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cde.d_namlen = 2;
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cde.d_off = 2 * sizeof(struct dirent);
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cde.d_name[0] = '.';
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cde.d_name[1] = '.';
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cde.d_name[2] = '\0';
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error = uiomove(&cde, sizeof(struct dirent), uio);
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if (error)
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goto out;
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}
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faked = (ip->i_number == NTFS_ROOTINO) ? 1 : 2;
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num = uio->uio_offset / sizeof(struct dirent) - faked;
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while (uio->uio_resid >= sizeof(struct dirent)) {
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struct attr_indexentry *iep;
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char *fname;
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size_t remains;
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int sz;
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error = ntfs_ntreaddir(ntmp, fp, num, &iep, uio->uio_procp);
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if (error)
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goto out;
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if (NULL == iep)
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break;
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for(; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (uio->uio_resid >= sizeof(struct dirent));
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iep = NTFS_NEXTREC(iep, struct attr_indexentry *))
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{
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if(!ntfs_isnamepermitted(ntmp,iep))
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continue;
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remains = sizeof(cde.d_name) - 1;
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fname = cde.d_name;
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for(i=0; i<iep->ie_fnamelen; i++) {
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sz = (*ntmp->ntm_wput)(fname, remains,
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iep->ie_fname[i]);
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fname += sz;
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remains -= sz;
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}
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*fname = '\0';
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DPRINTF("ntfs_readdir: elem: %u, fname:[%s] type: %u, "
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"flag: %u, ",
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num, cde.d_name, iep->ie_fnametype, iep->ie_flag);
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cde.d_namlen = fname - (char *) cde.d_name;
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cde.d_fileno = iep->ie_number;
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cde.d_type = (iep->ie_fflag & NTFS_FFLAG_DIR) ? DT_DIR : DT_REG;
|
|
cde.d_reclen = sizeof(struct dirent);
|
|
cde.d_off = uio->uio_offset + sizeof(struct dirent);
|
|
DPRINTF("%s\n", cde.d_type == DT_DIR ? "dir" : "reg");
|
|
|
|
error = uiomove(&cde, sizeof(struct dirent), uio);
|
|
if (error)
|
|
goto out;
|
|
num++;
|
|
}
|
|
}
|
|
|
|
DPRINTF("ntfs_readdir: %u entries (%lld bytes) read\n",
|
|
num, uio->uio_offset - off);
|
|
DPRINTF("ntfs_readdir: off: %lld resid: %zu\n",
|
|
uio->uio_offset, uio->uio_resid);
|
|
|
|
/*
|
|
if (ap->a_eofflag)
|
|
*ap->a_eofflag = VTONT(ap->a_vp)->i_size <= uio->uio_offset;
|
|
*/
|
|
out:
|
|
if (fp->f_dirblbuf != NULL) {
|
|
free(fp->f_dirblbuf, M_NTFSDIR, 0);
|
|
fp->f_dirblbuf = NULL;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
ntfs_lookup(void *v)
|
|
{
|
|
struct vop_lookup_args *ap = v;
|
|
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 %u, lp: %d, wp: %d \n",
|
|
(unsigned 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) &&
|
|
(cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
|
|
return (EROFS);
|
|
|
|
/*
|
|
* 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);
|
|
|
|
if(cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
|
|
DPRINTF("ntfs_lookup: faking . directory in %u\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 %u\n",
|
|
dip->i_number);
|
|
|
|
VOP_UNLOCK(dvp);
|
|
cnp->cn_flags |= PDIRUNLOCK;
|
|
|
|
error = ntfs_ntvattrget(ntmp, dip, NTFS_A_NAME, NULL, 0, &vap);
|
|
if(error)
|
|
return (error);
|
|
|
|
DPRINTF("ntfs_lookup: parentdir: %u\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) == 0)
|
|
cnp->cn_flags &= ~PDIRUNLOCK;
|
|
return (error);
|
|
}
|
|
|
|
if (lockparent && (cnp->cn_flags & ISLASTCN)) {
|
|
error = vn_lock(dvp, LK_EXCLUSIVE);
|
|
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: %u\n",
|
|
VTONT(*ap->a_vpp)->i_number);
|
|
|
|
if(!lockparent || (cnp->cn_flags & ISLASTCN) == 0) {
|
|
VOP_UNLOCK(dvp);
|
|
cnp->cn_flags |= PDIRUNLOCK;
|
|
}
|
|
}
|
|
|
|
if (cnp->cn_flags & MAKEENTRY)
|
|
cache_enter(dvp, *ap->a_vpp, cnp);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Flush the blocks of a file to disk.
|
|
*
|
|
* This function is worthless for vnodes that represent directories. Maybe we
|
|
* could just do a sync if they try an fsync on a directory file.
|
|
*/
|
|
int
|
|
ntfs_fsync(void *v)
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return POSIX pathconf information applicable to NTFS filesystem
|
|
*/
|
|
int
|
|
ntfs_pathconf(void *v)
|
|
{
|
|
struct vop_pathconf_args *ap = v;
|
|
int error = 0;
|
|
|
|
switch (ap->a_name) {
|
|
case _PC_LINK_MAX:
|
|
*ap->a_retval = 1;
|
|
break;
|
|
case _PC_NAME_MAX:
|
|
*ap->a_retval = NTFS_MAXFILENAME;
|
|
break;
|
|
case _PC_CHOWN_RESTRICTED:
|
|
*ap->a_retval = 1;
|
|
break;
|
|
case _PC_NO_TRUNC:
|
|
*ap->a_retval = 0;
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Global vfs data structures
|
|
*/
|
|
const struct vops ntfs_vops = {
|
|
.vop_getattr = ntfs_getattr,
|
|
.vop_inactive = ntfs_inactive,
|
|
.vop_reclaim = ntfs_reclaim,
|
|
.vop_print = ntfs_print,
|
|
.vop_pathconf = ntfs_pathconf,
|
|
.vop_lock = nullop,
|
|
.vop_unlock = nullop,
|
|
.vop_islocked = nullop,
|
|
.vop_lookup = ntfs_lookup,
|
|
.vop_access = ntfs_access,
|
|
.vop_close = ntfs_close,
|
|
.vop_open = ntfs_open,
|
|
.vop_readdir = ntfs_readdir,
|
|
.vop_fsync = ntfs_fsync,
|
|
.vop_bmap = ntfs_bmap,
|
|
.vop_strategy = ntfs_strategy,
|
|
.vop_bwrite = vop_generic_bwrite,
|
|
.vop_read = ntfs_read,
|
|
|
|
.vop_abortop = NULL,
|
|
.vop_advlock = NULL,
|
|
.vop_create = NULL,
|
|
.vop_ioctl = NULL,
|
|
.vop_link = NULL,
|
|
.vop_mknod = NULL,
|
|
.vop_readlink = NULL,
|
|
.vop_remove = eopnotsupp,
|
|
.vop_rename = NULL,
|
|
.vop_revoke = NULL,
|
|
.vop_mkdir = NULL,
|
|
.vop_rmdir = NULL,
|
|
.vop_setattr = NULL,
|
|
.vop_symlink = NULL,
|
|
.vop_write = NULL,
|
|
.vop_kqfilter = NULL
|
|
};
|