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src/sys/ntfs/ntfs_subr.c

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/* $OpenBSD: ntfs_subr.c,v 1.52 2022/01/11 03:13:59 jsg Exp $ */
/* $NetBSD: ntfs_subr.c,v 1.4 2003/04/10 21:37:32 jdolecek Exp $ */
/*-
* Copyright (c) 1998, 1999 Semen Ustimenko (semenu@FreeBSD.org)
* 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_subr.c,v 1.4 1999/05/12 09:43:01 semenu Exp
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/kernel.h>
#include <sys/vnode.h>
#include <sys/lock.h>
#include <sys/mount.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/rwlock.h>
#include <sys/specdev.h>
/* #define NTFS_DEBUG 1 */
#include <ntfs/ntfs.h>
#include <ntfs/ntfsmount.h>
#include <ntfs/ntfs_inode.h>
#include <ntfs/ntfs_vfsops.h>
#include <ntfs/ntfs_subr.h>
#include <ntfs/ntfs_compr.h>
#include <ntfs/ntfs_ihash.h>
#if defined(NTFS_DEBUG)
int ntfs_debug = NTFS_DEBUG;
#endif
/* Local struct used in ntfs_ntlookupfile() */
struct ntfs_lookup_ctx {
u_int32_t aoff;
u_int32_t rdsize;
cn_t cn;
struct ntfs_lookup_ctx *prev;
};
int ntfs_ntlookupattr(struct ntfsmount *, const char *, int, int *, char **);
int ntfs_findvattr(struct ntfsmount *, struct ntnode *, struct ntvattr **, struct ntvattr **, u_int32_t, const char *, size_t, cn_t);
int ntfs_uastricmp(struct ntfsmount *, const wchar *, size_t, const char *, size_t);
int ntfs_uastrcmp(struct ntfsmount *, const wchar *, size_t, const char *, size_t);
/* table for mapping Unicode chars into uppercase; it's filled upon first
* ntfs mount, freed upon last ntfs umount */
static wchar *ntfs_toupper_tab;
#define NTFS_U28(ch) ((((ch) & 0xE0) == 0) ? '_' : (ch) & 0xFF)
#define NTFS_TOUPPER(ch) (ntfs_toupper_tab[(unsigned char)(ch)])
struct rwlock ntfs_toupper_lock = RWLOCK_INITIALIZER("ntfs_toupper");
static signed int ntfs_toupper_usecount;
/* support macro for ntfs_ntvattrget() */
#define NTFS_AALPCMP(aalp,type,name,namelen) ( \
(aalp->al_type == type) && (aalp->al_namelen == namelen) && \
!ntfs_uastrcmp(ntmp, aalp->al_name,aalp->al_namelen,name,namelen) )
/*
*
*/
int
ntfs_ntvattrrele(struct ntvattr *vap)
{
DPRINTF("ntfs_ntvattrrele: ino: %u, type: 0x%x\n",
vap->va_ip->i_number, vap->va_type);
ntfs_ntrele(vap->va_ip);
return (0);
}
/*
* find the attribute in the ntnode
*/
int
ntfs_findvattr(struct ntfsmount *ntmp, struct ntnode *ip,
struct ntvattr **lvapp, struct ntvattr **vapp, u_int32_t type,
const char *name, size_t namelen, cn_t vcn)
{
int error;
struct ntvattr *vap;
if((ip->i_flag & IN_LOADED) == 0) {
DPRINTF("ntfs_findvattr: node not loaded, ino: %u\n",
ip->i_number);
error = ntfs_loadntnode(ntmp,ip);
if (error) {
printf("ntfs_findvattr: FAILED TO LOAD INO: %d\n",
ip->i_number);
return (error);
}
} else {
/* Update LRU loaded list. */
TAILQ_REMOVE(&ntmp->ntm_ntnodeq, ip, i_loaded);
TAILQ_INSERT_HEAD(&ntmp->ntm_ntnodeq, ip, i_loaded);
}
*lvapp = NULL;
*vapp = NULL;
LIST_FOREACH(vap, &ip->i_valist, va_list) {
DDPRINTF("ntfs_findvattr: type: 0x%x, vcn: %llu - %llu\n",
vap->va_type, vap->va_vcnstart, vap->va_vcnend);
if ((vap->va_type == type) &&
(vap->va_vcnstart <= vcn) && (vap->va_vcnend >= vcn) &&
(vap->va_namelen == namelen) &&
(strncmp(name, vap->va_name, namelen) == 0)) {
*vapp = vap;
ntfs_ntref(vap->va_ip);
return (0);
}
if (vap->va_type == NTFS_A_ATTRLIST)
*lvapp = vap;
}
return (-1);
}
/*
* Search attribute specified in ntnode (load ntnode if necessary).
* If not found but ATTR_A_ATTRLIST present, read it in and search through.
* VOP_VGET node needed, and lookup through its ntnode (load if necessary).
*
* ntnode should be locked
*/
int
ntfs_ntvattrget(struct ntfsmount *ntmp, struct ntnode *ip, u_int32_t type,
const char *name, cn_t vcn, struct ntvattr **vapp)
{
struct ntvattr *lvap = NULL;
struct attr_attrlist *aalp;
struct attr_attrlist *nextaalp;
struct vnode *newvp;
struct ntnode *newip;
caddr_t alpool;
size_t namelen, len;
int error;
*vapp = NULL;
if (name) {
DPRINTF("ntfs_ntvattrget: ino: %u, type: 0x%x, name: %s, "
"vcn: %llu\n", ip->i_number, type, name, vcn);
namelen = strlen(name);
} else {
DPRINTF("ntfs_ntvattrget: ino: %u, type: 0x%x, vcn: %llu\n",
ip->i_number, type, vcn);
name = "";
namelen = 0;
}
error = ntfs_findvattr(ntmp, ip, &lvap, vapp, type, name, namelen, vcn);
if (error >= 0)
return (error);
if (!lvap) {
DPRINTF("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: ino: %u, "
"type: 0x%x, name: %s, vcn: %llu\n", ip->i_number, type,
name, vcn);
return (ENOENT);
}
/* Scan $ATTRIBUTE_LIST for requested attribute */
len = lvap->va_datalen;
alpool = malloc(len, M_TEMP, M_WAITOK);
error = ntfs_readntvattr_plain(ntmp, ip, lvap, 0, len, alpool, &len,
NULL);
if (error)
goto out;
aalp = (struct attr_attrlist *) alpool;
nextaalp = NULL;
for(; len > 0; aalp = nextaalp) {
DPRINTF("ntfs_ntvattrget: attrlist: ino: %u, attr: 0x%x, "
"vcn: %llu\n", aalp->al_inumber, aalp->al_type,
aalp->al_vcnstart);
if (len > aalp->reclen) {
nextaalp = NTFS_NEXTREC(aalp, struct attr_attrlist *);
} else {
nextaalp = NULL;
}
len -= aalp->reclen;
if (!NTFS_AALPCMP(aalp, type, name, namelen) ||
(nextaalp && (nextaalp->al_vcnstart <= vcn) &&
NTFS_AALPCMP(nextaalp, type, name, namelen)))
continue;
DPRINTF("ntfs_ntvattrget: attribute in ino: %u\n",
aalp->al_inumber);
/* this is not a main record, so we can't use just plain
vget() */
error = ntfs_vgetex(ntmp->ntm_mountp, aalp->al_inumber,
NTFS_A_DATA, NULL, LK_EXCLUSIVE,
VG_EXT, &newvp);
if (error) {
printf("ntfs_ntvattrget: CAN'T VGET INO: %d\n",
aalp->al_inumber);
goto out;
}
newip = VTONT(newvp);
/* XXX have to lock ntnode */
error = ntfs_findvattr(ntmp, newip, &lvap, vapp,
type, name, namelen, vcn);
vput(newvp);
if (error == 0)
goto out;
printf("ntfs_ntvattrget: ATTRLIST ERROR.\n");
break;
}
error = ENOENT;
DPRINTF("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: ino: %u, type: 0x%x, "
"name: %.*s, vcn: %llu\n", ip->i_number, type,
(unsigned int)namelen, name, vcn);
out:
free(alpool, M_TEMP, 0);
return (error);
}
/*
* Read ntnode from disk, make ntvattr list.
*
* ntnode should be locked
*/
int
ntfs_loadntnode(struct ntfsmount *ntmp, struct ntnode *ip)
{
struct ntnode *oip;
struct ntvattr *vap;
struct filerec *mfrp;
struct attr *ap;
daddr_t bn;
int error,off;
DPRINTF("ntfs_loadntnode: loading ino: %u\n", ip->i_number);
KASSERT((ip->i_flag & IN_LOADED) == 0);
if (ntmp->ntm_ntnodes >= LOADED_NTNODE_HI) {
oip = TAILQ_LAST(&ntmp->ntm_ntnodeq, ntnodeq);
TAILQ_REMOVE(&ntmp->ntm_ntnodeq, oip, i_loaded);
ntmp->ntm_ntnodes--;
DPRINTF("ntfs_loadntnode: unloading ino: %u\n", oip->i_number);
KASSERT((oip->i_flag & IN_LOADED));
oip->i_flag &= ~IN_LOADED;
while ((vap = LIST_FIRST(&oip->i_valist)) != NULL) {
LIST_REMOVE(vap, va_list);
ntfs_freentvattr(vap);
}
}
mfrp = malloc(ntfs_bntob(ntmp->ntm_bpmftrec), M_TEMP, M_WAITOK);
if (ip->i_number < NTFS_SYSNODESNUM) {
struct buf *bp;
DPRINTF("ntfs_loadntnode: read system node\n");
bn = ntfs_cntobn(ntmp->ntm_mftcn) +
ntmp->ntm_bpmftrec * ip->i_number;
error = bread(ntmp->ntm_devvp, bn,
ntfs_bntob(ntmp->ntm_bpmftrec), &bp);
if (error) {
printf("ntfs_loadntnode: BREAD FAILED\n");
brelse(bp);
goto out;
}
memcpy(mfrp, bp->b_data, ntfs_bntob(ntmp->ntm_bpmftrec));
brelse(bp);
} else {
struct vnode *vp;
vp = ntmp->ntm_sysvn[NTFS_MFTINO];
error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
ip->i_number * ntfs_bntob(ntmp->ntm_bpmftrec),
ntfs_bntob(ntmp->ntm_bpmftrec), mfrp, NULL);
if (error) {
printf("ntfs_loadntnode: ntfs_readattr failed\n");
goto out;
}
}
/* Check if magic and fixups are correct */
error = ntfs_procfixups(ntmp, NTFS_FILEMAGIC, (caddr_t)mfrp,
ntfs_bntob(ntmp->ntm_bpmftrec));
if (error) {
printf("ntfs_loadntnode: BAD MFT RECORD %d\n",
(u_int32_t) ip->i_number);
goto out;
}
DPRINTF("ntfs_loadntnode: load attrs for ino: %u\n", ip->i_number);
off = mfrp->fr_attroff;
ap = (struct attr *) ((caddr_t)mfrp + off);
LIST_INIT(&ip->i_valist);
while (ap->a_hdr.a_type != -1) {
error = ntfs_attrtontvattr(ntmp, &vap, ap);
if (error)
break;
vap->va_ip = ip;
LIST_INSERT_HEAD(&ip->i_valist, vap, va_list);
off += ap->a_hdr.reclen;
ap = (struct attr *) ((caddr_t)mfrp + off);
}
if (error) {
printf("ntfs_loadntnode: failed to load attr ino: %d\n",
ip->i_number);
goto out;
}
ip->i_mainrec = mfrp->fr_mainrec;
ip->i_nlink = mfrp->fr_nlink;
ip->i_frflag = mfrp->fr_flags;
ip->i_flag |= IN_LOADED;
/* Add to loaded list. */
TAILQ_INSERT_HEAD(&ntmp->ntm_ntnodeq, ip, i_loaded);
ntmp->ntm_ntnodes++;
out:
free(mfrp, M_TEMP, 0);
return (error);
}
/*
* Routine locks ntnode and increase usecount, just opposite of
* ntfs_ntput().
*/
int
ntfs_ntget(struct ntnode *ip)
{
DPRINTF("ntfs_ntget: get ntnode %u: %p, usecount: %d\n",
ip->i_number, ip, ip->i_usecount);
ip->i_usecount++;
rw_enter_write(&ip->i_lock);
return 0;
}
/*
* Routine search ntnode in hash, if found: lock, inc usecount and return.
* If not in hash allocate structure for ntnode, prefill it, lock,
* inc count and return.
*
* ntnode returned locked
*/
int
ntfs_ntlookup(struct ntfsmount *ntmp, ntfsino_t ino, struct ntnode **ipp)
{
struct ntnode *ip;
DPRINTF("ntfs_ntlookup: looking for ntnode %u\n", ino);
do {
if ((ip = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL) {
ntfs_ntget(ip);
DPRINTF("ntfs_ntlookup: ntnode %u: %p, usecount: %d\n",
ino, ip, ip->i_usecount);
*ipp = ip;
return (0);
}
} while (rw_enter(&ntfs_hashlock, RW_WRITE | RW_SLEEPFAIL));
ip = malloc(sizeof(*ip), M_NTFSNTNODE, M_WAITOK | M_ZERO);
DDPRINTF("ntfs_ntlookup: allocating ntnode: %u: %p\n", ino, ip);
/* Generic initialization */
ip->i_devvp = ntmp->ntm_devvp;
ip->i_dev = ntmp->ntm_dev;
ip->i_number = ino;
ip->i_mp = ntmp;
LIST_INIT(&ip->i_fnlist);
vref(ip->i_devvp);
/* init lock and lock the newborn ntnode */
rw_init(&ip->i_lock, "ntnode");
ntfs_ntget(ip);
ntfs_nthashins(ip);
rw_exit(&ntfs_hashlock);
*ipp = ip;
DPRINTF("ntfs_ntlookup: ntnode %u: %p, usecount: %d\n",
ino, ip, ip->i_usecount);
return (0);
}
/*
* Decrement usecount of ntnode and unlock it, if usecount reach zero,
* deallocate ntnode.
*
* ntnode should be locked on entry, and unlocked on return.
*/
void
ntfs_ntput(struct ntnode *ip)
{
struct ntfsmount *ntmp = ip->i_mp;
struct ntvattr *vap;
DPRINTF("ntfs_ntput: rele ntnode %u: %p, usecount: %d\n",
ip->i_number, ip, ip->i_usecount);
ip->i_usecount--;
#ifdef DIAGNOSTIC
if (ip->i_usecount < 0) {
panic("ntfs_ntput: ino: %d usecount: %d ",
ip->i_number,ip->i_usecount);
}
#endif
if (ip->i_usecount > 0) {
rw_exit_write(&ip->i_lock);
return;
}
DPRINTF("ntfs_ntput: deallocating ntnode: %u\n", ip->i_number);
if (LIST_FIRST(&ip->i_fnlist))
panic("ntfs_ntput: ntnode has fnodes");
ntfs_nthashrem(ip);
/* Remove from loaded list. */
if (ip->i_flag & IN_LOADED) {
TAILQ_REMOVE(&ntmp->ntm_ntnodeq, ip, i_loaded);
ntmp->ntm_ntnodes--;
}
while ((vap = LIST_FIRST(&ip->i_valist)) != NULL) {
LIST_REMOVE(vap, va_list);
ntfs_freentvattr(vap);
}
vrele(ip->i_devvp);
free(ip, M_NTFSNTNODE, 0);
}
/*
* increment usecount of ntnode
*/
void
ntfs_ntref(struct ntnode *ip)
{
ip->i_usecount++;
DPRINTF("ntfs_ntref: ino %u, usecount: %d\n",
ip->i_number, ip->i_usecount);
}
/*
* Decrement usecount of ntnode.
*/
void
ntfs_ntrele(struct ntnode *ip)
{
DPRINTF("ntfs_ntrele: rele ntnode %u: %p, usecount: %d\n",
ip->i_number, ip, ip->i_usecount);
ip->i_usecount--;
if (ip->i_usecount < 0)
panic("ntfs_ntrele: ino: %d usecount: %d ",
ip->i_number,ip->i_usecount);
}
/*
* Deallocate all memory allocated for ntvattr
*/
void
ntfs_freentvattr(struct ntvattr *vap)
{
if (vap->va_flag & NTFS_AF_INRUN) {
if (vap->va_vruncn)
free(vap->va_vruncn, M_NTFSRUN, 0);
if (vap->va_vruncl)
free(vap->va_vruncl, M_NTFSRUN, 0);
} else {
if (vap->va_datap)
free(vap->va_datap, M_NTFSRDATA, 0);
}
free(vap, M_NTFSNTVATTR, 0);
}
/*
* Convert disk image of attribute into ntvattr structure,
* runs are expanded also.
*/
int
ntfs_attrtontvattr(struct ntfsmount *ntmp, struct ntvattr **rvapp,
struct attr *rap)
{
int error, i;
struct ntvattr *vap;
error = 0;
*rvapp = NULL;
vap = malloc(sizeof(*vap), M_NTFSNTVATTR, M_WAITOK | M_ZERO);
vap->va_ip = NULL;
vap->va_flag = rap->a_hdr.a_flag;
vap->va_type = rap->a_hdr.a_type;
vap->va_compression = rap->a_hdr.a_compression;
vap->va_index = rap->a_hdr.a_index;
DDPRINTF("type: 0x%x, index: %u", vap->va_type, vap->va_index);
vap->va_namelen = rap->a_hdr.a_namelen;
if (rap->a_hdr.a_namelen) {
wchar *unp = (wchar *) ((caddr_t) rap + rap->a_hdr.a_nameoff);
DDPRINTF(", name:[");
for (i = 0; i < vap->va_namelen; i++) {
vap->va_name[i] = unp[i];
DDPRINTF("%c", vap->va_name[i]);
}
DDPRINTF("]");
}
if (vap->va_flag & NTFS_AF_INRUN) {
DDPRINTF(", nonres.");
vap->va_datalen = rap->a_nr.a_datalen;
vap->va_allocated = rap->a_nr.a_allocated;
vap->va_vcnstart = rap->a_nr.a_vcnstart;
vap->va_vcnend = rap->a_nr.a_vcnend;
vap->va_compressalg = rap->a_nr.a_compressalg;
error = ntfs_runtovrun(&(vap->va_vruncn), &(vap->va_vruncl),
&(vap->va_vruncnt),
(caddr_t) rap + rap->a_nr.a_dataoff);
} else {
vap->va_compressalg = 0;
DDPRINTF(", res.");
vap->va_datalen = rap->a_r.a_datalen;
vap->va_allocated = rap->a_r.a_datalen;
vap->va_vcnstart = 0;
vap->va_vcnend = ntfs_btocn(vap->va_allocated);
vap->va_datap = malloc(vap->va_datalen, M_NTFSRDATA, M_WAITOK);
memcpy(vap->va_datap, (caddr_t) rap + rap->a_r.a_dataoff,
rap->a_r.a_datalen);
}
DDPRINTF(", len: %llu", vap->va_datalen);
if (error)
free(vap, M_NTFSNTVATTR, 0);
else
*rvapp = vap;
DDPRINTF("\n");
return (error);
}
/*
* Expand run into more utilizable and more memory eating format.
*/
int
ntfs_runtovrun(cn_t **rcnp, cn_t **rclp, u_long *rcntp, u_int8_t *run)
{
u_int32_t off;
u_int32_t sz, i;
cn_t *cn;
cn_t *cl;
u_long cnt;
cn_t prev;
cn_t tmp;
off = 0;
cnt = 0;
while (run[off]) {
off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1;
cnt++;
}
cn = mallocarray(cnt, sizeof(cn_t), M_NTFSRUN, M_WAITOK);
cl = mallocarray(cnt, sizeof(cn_t), M_NTFSRUN, M_WAITOK);
off = 0;
cnt = 0;
prev = 0;
while (run[off]) {
sz = run[off++];
cl[cnt] = 0;
for (i = 0; i < (sz & 0xF); i++)
cl[cnt] += (u_int32_t) run[off++] << (i << 3);
sz >>= 4;
if (run[off + sz - 1] & 0x80) {
tmp = ((u_int64_t) - 1) << (sz << 3);
for (i = 0; i < sz; i++)
tmp |= (u_int64_t) run[off++] << (i << 3);
} else {
tmp = 0;
for (i = 0; i < sz; i++)
tmp |= (u_int64_t) run[off++] << (i << 3);
}
if (tmp)
prev = cn[cnt] = prev + tmp;
else
cn[cnt] = tmp;
cnt++;
}
*rcnp = cn;
*rclp = cl;
*rcntp = cnt;
return (0);
}
/*
* Compare unicode and ascii string case insens.
*/
int
ntfs_uastricmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen,
const char *astr, size_t astrlen)
{
size_t i;
int res;
const char *astrend = astr + astrlen;
for (i = 0; i < ustrlen && astr < astrend; i++) {
res = (*ntmp->ntm_wcmp)(NTFS_TOUPPER(ustr[i]),
NTFS_TOUPPER((*ntmp->ntm_wget)(&astr)) );
if (res)
return res;
}
if (i == ustrlen && astr == astrend)
return 0;
else if (i == ustrlen)
return -1;
else
return 1;
}
/*
* Compare unicode and ascii string case sens.
*/
int
ntfs_uastrcmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen,
const char *astr, size_t astrlen)
{
size_t i;
int res;
const char *astrend = astr + astrlen;
for (i = 0; (i < ustrlen) && (astr < astrend); i++) {
res = (*ntmp->ntm_wcmp)(ustr[i], (*ntmp->ntm_wget)(&astr));
if (res)
return res;
}
if (i == ustrlen && astr == astrend)
return 0;
else if (i == ustrlen)
return -1;
else
return 1;
}
/*
* Search fnode in ntnode, if not found allocate and preinitialize.
*
* ntnode should be locked on entry.
*/
int
ntfs_fget(struct ntfsmount *ntmp, struct ntnode *ip, int attrtype,
char *attrname, struct fnode **fpp)
{
struct fnode *fp;
DPRINTF("ntfs_fget: ino: %u, attrtype: 0x%x, attrname: %s\n",
ip->i_number, attrtype, attrname ? attrname : "");
*fpp = NULL;
LIST_FOREACH(fp, &ip->i_fnlist, f_fnlist) {
DPRINTF("ntfs_fget: fnode: attrtype: %u, attrname: %s\n",
fp->f_attrtype, fp->f_attrname ? fp->f_attrname : "");
if ((attrtype == fp->f_attrtype) &&
((!attrname && !fp->f_attrname) ||
(attrname && fp->f_attrname &&
!strcmp(attrname,fp->f_attrname)))){
DPRINTF("ntfs_fget: found existed: %p\n", fp);
*fpp = fp;
}
}
if (*fpp)
return (0);
fp = malloc(sizeof(*fp), M_NTFSFNODE, M_WAITOK | M_ZERO);
DPRINTF("ntfs_fget: allocating fnode: %p\n", fp);
fp->f_ip = ip;
fp->f_attrname = attrname;
if (fp->f_attrname) fp->f_flag |= FN_AATTRNAME;
fp->f_attrtype = attrtype;
ntfs_ntref(ip);
LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist);
*fpp = fp;
return (0);
}
/*
* Deallocate fnode, remove it from ntnode's fnode list.
*
* ntnode should be locked.
*/
void
ntfs_frele(struct fnode *fp)
{
struct ntnode *ip = FTONT(fp);
DPRINTF("ntfs_frele: fnode: %p for %u: %p\n", fp, ip->i_number, ip);
DPRINTF("ntfs_frele: deallocating fnode\n");
LIST_REMOVE(fp,f_fnlist);
if (fp->f_flag & FN_AATTRNAME)
free(fp->f_attrname, M_TEMP, 0);
if (fp->f_dirblbuf)
free(fp->f_dirblbuf, M_NTFSDIR, 0);
free(fp, M_NTFSFNODE, 0);
ntfs_ntrele(ip);
}
/*
* Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME],
* $ATTR_TYPE is searched in attrdefs read from $AttrDefs.
* If $ATTR_TYPE not specified, ATTR_A_DATA assumed.
*/
int
ntfs_ntlookupattr(struct ntfsmount *ntmp, const char *name, int namelen,
int *attrtype, char **attrname)
{
const char *sys;
size_t syslen, i;
struct ntvattrdef *adp;
if (namelen == 0)
return (0);
if (name[0] == '$') {
sys = name;
for (syslen = 0; syslen < namelen; syslen++) {
if(sys[syslen] == ':') {
name++;
namelen--;
break;
}
}
name += syslen;
namelen -= syslen;
adp = ntmp->ntm_ad;
for (i = 0; i < ntmp->ntm_adnum; i++, adp++){
if (syslen != adp->ad_namelen ||
strncmp(sys, adp->ad_name, syslen) != 0)
continue;
*attrtype = adp->ad_type;
goto out;
}
return (ENOENT);
}
out:
if (namelen) {
*attrname = malloc(namelen + 1, M_TEMP, M_WAITOK);
memcpy(*attrname, name, namelen);
(*attrname)[namelen] = '\0';
*attrtype = NTFS_A_DATA;
}
return (0);
}
/*
* Lookup specified node for filename, matching cnp, return fnode filled.
*/
int
ntfs_ntlookupfile(struct ntfsmount *ntmp, struct vnode *vp,
struct componentname *cnp, struct vnode **vpp)
{
struct fnode *fp = VTOF(vp);
struct ntnode *ip = FTONT(fp);
struct ntvattr *vap = NULL; /* Root attribute */
cn_t cn = 0; /* VCN in current attribute */
caddr_t rdbuf = NULL; /* Buffer to read directory's blocks */
u_int32_t blsize;
u_int32_t rdsize; /* Length of data to read from current block */
struct attr_indexentry *iep;
int error, res, anamelen, fnamelen;
const char *fname,*aname;
u_int32_t aoff;
int attrtype = NTFS_A_DATA;
char *attrname = NULL;
struct fnode *nfp;
struct vnode *nvp;
enum vtype f_type;
int fullscan = 0;
struct ntfs_lookup_ctx *lookup_ctx = NULL, *tctx;
error = ntfs_ntget(ip);
if (error)
return (error);
error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
if (error || (vap->va_flag & NTFS_AF_INRUN)) {
error = ENOTDIR;
goto fail;
}
/*
* Divide file name into: foofilefoofilefoofile[:attrspec]
* Store like this: fname:fnamelen [aname:anamelen]
*/
fname = cnp->cn_nameptr;
aname = NULL;
anamelen = 0;
for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
if(fname[fnamelen] == ':') {
aname = fname + fnamelen + 1;
anamelen = cnp->cn_namelen - fnamelen - 1;
DPRINTF("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n",
fname, fnamelen, aname, anamelen);
break;
}
blsize = vap->va_a_iroot->ir_size;
DPRINTF("ntfs_ntlookupfile: blksz: %u\n", blsize);
rdbuf = malloc(blsize, M_TEMP, M_WAITOK);
loop:
rdsize = vap->va_datalen;
DPRINTF("ntfs_ntlookupfile: rdsz: %u\n", rdsize);
error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30",
0, rdsize, rdbuf, NULL);
if (error)
goto fail;
aoff = sizeof(struct attr_indexroot);
do {
iep = (struct attr_indexentry *) (rdbuf + aoff);
for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
aoff += iep->reclen,
iep = (struct attr_indexentry *) (rdbuf + aoff))
{
DDPRINTF("scan: %u, %u\n", iep->ie_number,
iep->ie_fnametype);
/* check the name - the case-insensitive check
* has to come first, to break from this for loop
* if needed, so we can dive correctly */
res = ntfs_uastricmp(ntmp, iep->ie_fname,
iep->ie_fnamelen, fname, fnamelen);
if (!fullscan) {
if (res > 0) break;
if (res < 0) continue;
}
if (iep->ie_fnametype == 0 ||
!(ntmp->ntm_flag & NTFS_MFLAG_CASEINS))
{
res = ntfs_uastrcmp(ntmp, iep->ie_fname,
iep->ie_fnamelen, fname, fnamelen);
if (res != 0 && !fullscan) continue;
}
/* if we perform full scan, the file does not match
* and this is subnode, dive */
if (fullscan && res != 0) {
if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
tctx = malloc(sizeof(struct ntfs_lookup_ctx),
M_TEMP, M_WAITOK);
tctx->aoff = aoff + iep->reclen;
tctx->rdsize = rdsize;
tctx->cn = cn;
tctx->prev = lookup_ctx;
lookup_ctx = tctx;
break;
} else
continue;
}
if (aname) {
error = ntfs_ntlookupattr(ntmp,
aname, anamelen,
&attrtype, &attrname);
if (error)
goto fail;
}
/* Check if we've found ourselves */
if ((iep->ie_number == ip->i_number) &&
(attrtype == fp->f_attrtype) &&
((!attrname && !fp->f_attrname) ||
(attrname && fp->f_attrname &&
!strcmp(attrname, fp->f_attrname))))
{
vref(vp);
*vpp = vp;
error = 0;
goto fail;
}
/* free the buffer returned by ntfs_ntlookupattr() */
if (attrname) {
free(attrname, M_TEMP, 0);
attrname = NULL;
}
/* vget node, but don't load it */
error = ntfs_vgetex(ntmp->ntm_mountp,
iep->ie_number, attrtype, attrname,
LK_EXCLUSIVE, VG_DONTLOADIN | VG_DONTVALIDFN,
&nvp);
if (error)
goto fail;
nfp = VTOF(nvp);
if (nfp->f_flag & FN_VALID) {
*vpp = nvp;
goto fail;
}
nfp->f_fflag = iep->ie_fflag;
nfp->f_pnumber = iep->ie_fpnumber;
nfp->f_times = iep->ie_ftimes;
if((nfp->f_fflag & NTFS_FFLAG_DIR) &&
(nfp->f_attrtype == NTFS_A_DATA) &&
(nfp->f_attrname == NULL))
f_type = VDIR;
else
f_type = VREG;
nvp->v_type = f_type;
if ((nfp->f_attrtype == NTFS_A_DATA) &&
(nfp->f_attrname == NULL))
{
/* Opening default attribute */
nfp->f_size = iep->ie_fsize;
nfp->f_allocated = iep->ie_fallocated;
nfp->f_flag |= FN_PRELOADED;
} else {
error = ntfs_filesize(ntmp, nfp,
&nfp->f_size, &nfp->f_allocated);
if (error) {
vput(nvp);
goto fail;
}
}
nfp->f_flag &= ~FN_VALID;
*vpp = nvp;
goto fail;
}
/* Dive if possible */
if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
DPRINTF("ntfs_ntlookupfile: diving\n");
cn = *(cn_t *) (rdbuf + aoff +
iep->reclen - sizeof(cn_t));
rdsize = blsize;
error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30",
ntfs_cntob(cn), rdsize, rdbuf, NULL);
if (error)
goto fail;
error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
rdbuf, rdsize);
if (error)
goto fail;
aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
0x18);
} else if (fullscan && lookup_ctx) {
cn = lookup_ctx->cn;
aoff = lookup_ctx->aoff;
rdsize = lookup_ctx->rdsize;
error = ntfs_readattr(ntmp, ip,
(cn == 0) ? NTFS_A_INDXROOT : NTFS_A_INDX,
"$I30", ntfs_cntob(cn), rdsize, rdbuf, NULL);
if (error)
goto fail;
if (cn != 0) {
error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
rdbuf, rdsize);
if (error)
goto fail;
}
tctx = lookup_ctx;
lookup_ctx = lookup_ctx->prev;
free(tctx, M_TEMP, 0);
} else {
DPRINTF("ntfs_ntlookupfile: nowhere to dive :-(\n");
error = ENOENT;
break;
}
} while (1);
if (error == ENOENT) {
/* perform full scan if no entry was found */
if (!fullscan) {
fullscan = 1;
cn = 0; /* need zero, used by lookup_ctx */
DDPRINTF("ntfs_ntlookupfile: fullscan performed for: %.*s\n",
(unsigned int)fnamelen, fname);
goto loop;
}
if ((cnp->cn_flags & ISLASTCN) &&
(cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME))
error = EJUSTRETURN;
}
DPRINTF("finish\n");
fail:
if (vap)
ntfs_ntvattrrele(vap);
if (rdbuf)
free(rdbuf, M_TEMP, 0);
if (attrname)
free(attrname, M_TEMP, 0);
if (lookup_ctx) {
while(lookup_ctx) {
tctx = lookup_ctx;
lookup_ctx = lookup_ctx->prev;
free(tctx, M_TEMP, 0);
}
}
ntfs_ntput(ip);
return (error);
}
/*
* Check if name type is permitted to show.
*/
int
ntfs_isnamepermitted(struct ntfsmount *ntmp, struct attr_indexentry *iep)
{
if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)
return 1;
switch (iep->ie_fnametype) {
case 2:
DDPRINTF("ntfs_isnamepermitted: skipped DOS name\n");
return 0;
case 0: case 1: case 3:
return 1;
default:
printf("ntfs_isnamepermitted: " \
"WARNING! Unknown file name type: %d\n",
iep->ie_fnametype);
break;
}
return 0;
}
/*
* Read ntfs dir like stream of attr_indexentry, not like btree of them.
* This is done by scanning $BITMAP:$I30 for busy clusters and reading them.
* Of course $INDEX_ROOT:$I30 is read before. Last read values are stored in
* fnode, so we can skip toward record number num almost immediately.
* Anyway this is rather slow routine. The problem is that we don't know
* how many records are there in $INDEX_ALLOCATION:$I30 block.
*/
int
ntfs_ntreaddir(struct ntfsmount *ntmp, struct fnode *fp, u_int32_t num,
struct attr_indexentry **riepp, struct proc *p)
{
struct ntnode *ip = FTONT(fp);
struct ntvattr *vap = NULL; /* IndexRoot attribute */
struct ntvattr *bmvap = NULL; /* BitMap attribute */
struct ntvattr *iavap = NULL; /* IndexAllocation attribute */
caddr_t rdbuf; /* Buffer to read directory's blocks */
u_int8_t *bmp = NULL; /* Bitmap */
u_int32_t blsize; /* Index allocation size (2048) */
u_int32_t rdsize; /* Length of data to read */
u_int32_t attrnum; /* Current attribute type */
u_int32_t cpbl = 1; /* Clusters per directory block */
u_int32_t blnum;
struct attr_indexentry *iep;
int error = ENOENT;
u_int32_t aoff, cnum;
DPRINTF("ntfs_ntreaddir: read ino: %u, num: %u\n", ip->i_number, num);
error = ntfs_ntget(ip);
if (error)
return (error);
error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
if (error) {
error = ENOTDIR;
goto fail;
}
if (fp->f_dirblbuf == NULL) {
fp->f_dirblsz = vap->va_a_iroot->ir_size;
fp->f_dirblbuf = malloc(MAX(vap->va_datalen,fp->f_dirblsz),
M_NTFSDIR, M_WAITOK);
}
blsize = fp->f_dirblsz;
rdbuf = fp->f_dirblbuf;
DPRINTF("ntfs_ntreaddir: rdbuf: %p, blsize: %u\n", rdbuf, blsize);
if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) {
error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30",
0, &bmvap);
if (error) {
error = ENOTDIR;
goto fail;
}
bmp = malloc(bmvap->va_datalen, M_TEMP, M_WAITOK);
error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0,
bmvap->va_datalen, bmp, NULL);
if (error)
goto fail;
error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30",
0, &iavap);
if (error) {
error = ENOTDIR;
goto fail;
}
cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1);
DPRINTF("ntfs_ntreaddir: indexalloc: %llu, cpbl: %u\n",
iavap->va_datalen, cpbl);
} else {
DPRINTF("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n");
iavap = bmvap = NULL;
bmp = NULL;
}
/* Try use previous values */
if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
attrnum = fp->f_lastdattr;
aoff = fp->f_lastdoff;
blnum = fp->f_lastdblnum;
cnum = fp->f_lastdnum;
} else {
attrnum = NTFS_A_INDXROOT;
aoff = sizeof(struct attr_indexroot);
blnum = 0;
cnum = 0;
}
do {
DPRINTF("ntfs_ntreaddir: scan: 0x%x, %u, %u, %u, %u\n",
attrnum, blnum, cnum, num, aoff);
rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize;
error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
ntfs_cntob(blnum * cpbl), rdsize, rdbuf, NULL);
if (error)
goto fail;
if (attrnum == NTFS_A_INDX) {
error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
rdbuf, rdsize);
if (error)
goto fail;
}
if (aoff == 0)
aoff = (attrnum == NTFS_A_INDX) ?
(0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) :
sizeof(struct attr_indexroot);
iep = (struct attr_indexentry *) (rdbuf + aoff);
for (; !(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff);
aoff += iep->reclen,
iep = (struct attr_indexentry *) (rdbuf + aoff))
{
if (!ntfs_isnamepermitted(ntmp, iep)) continue;
if (cnum >= num) {
fp->f_lastdnum = cnum;
fp->f_lastdoff = aoff;
fp->f_lastdblnum = blnum;
fp->f_lastdattr = attrnum;
*riepp = iep;
error = 0;
goto fail;
}
cnum++;
}
if (iavap) {
if (attrnum == NTFS_A_INDXROOT)
blnum = 0;
else
blnum++;
while (ntfs_cntob(blnum * cpbl) < iavap->va_datalen) {
if (bmp[blnum >> 3] & (1 << (blnum & 7)))
break;
blnum++;
}
attrnum = NTFS_A_INDX;
aoff = 0;
if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen)
break;
DPRINTF("ntfs_ntreaddir: blnum: %u\n", blnum);
}
} while (iavap);
*riepp = NULL;
fp->f_lastdnum = 0;
fail:
if (vap)
ntfs_ntvattrrele(vap);
if (bmvap)
ntfs_ntvattrrele(bmvap);
if (iavap)
ntfs_ntvattrrele(iavap);
if (bmp)
free(bmp, M_TEMP, 0);
ntfs_ntput(ip);
return (error);
}
/*
* Convert NTFS times that are in 100 ns units and begins from
* 1601 Jan 1 into unix times.
*/
struct timespec
ntfs_nttimetounix(u_int64_t nt)
{
struct timespec t;
/* Windows NT times are in 100 ns and from 1601 Jan 1 */
t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100;
t.tv_sec = nt / (1000 * 1000 * 10) -
369LL * 365LL * 24LL * 60LL * 60LL -
89LL * 1LL * 24LL * 60LL * 60LL;
return (t);
}
/*
* Get file sizes from corresponding attribute.
*
* ntnode under fnode should be locked.
*/
int
ntfs_filesize(struct ntfsmount *ntmp, struct fnode *fp, u_int64_t *size,
u_int64_t *bytes)
{
struct ntvattr *vap;
struct ntnode *ip = FTONT(fp);
u_int64_t sz, bn;
int error;
DPRINTF("ntfs_filesize: ino: %u\n", ip->i_number);
error = ntfs_ntvattrget(ntmp, ip,
fp->f_attrtype, fp->f_attrname, 0, &vap);
if (error)
return (error);
bn = vap->va_allocated;
sz = vap->va_datalen;
DPRINTF("ntfs_filesize: %llu bytes (%llu bytes allocated)\n", sz, bn);
if (size)
*size = sz;
if (bytes)
*bytes = bn;
ntfs_ntvattrrele(vap);
return (0);
}
/*
* This is one of the read routines.
*
* ntnode should be locked.
*/
int
ntfs_readntvattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
struct ntvattr *vap, off_t roff, size_t rsize, void *rdata, size_t *initp,
struct uio *uio)
{
int error = 0;
off_t off;
*initp = 0;
if (vap->va_flag & NTFS_AF_INRUN) {
int cnt;
cn_t ccn, ccl, cn, cl;
caddr_t data = rdata;
struct buf *bp;
size_t left, tocopy;
DDPRINTF("ntfs_readntvattr_plain: data in run: %lu chains\n",
vap->va_vruncnt);
off = roff;
left = rsize;
ccl = 0;
ccn = 0;
cnt = 0;
while (left && (cnt < vap->va_vruncnt)) {
ccn = vap->va_vruncn[cnt];
ccl = vap->va_vruncl[cnt];
DDPRINTF("ntfs_readntvattr_plain: left %zu, "
"cn: 0x%llx, cl: %llu, off: %lld\n",
left, ccn, ccl, off);
if (ntfs_cntob(ccl) < off) {
off -= ntfs_cntob(ccl);
cnt++;
continue;
}
if (ccn || ip->i_number == NTFS_BOOTINO) {
ccl -= ntfs_btocn(off);
cn = ccn + ntfs_btocn(off);
off = ntfs_btocnoff(off);
while (left && ccl) {
/*
* Always read single clusters at a
* time - we need to avoid reading
* differently-sized blocks at the
* same disk offsets to avoid
* confusing the buffer cache.
*/
tocopy = MIN(left,
ntfs_cntob(1) - off);
cl = ntfs_btocl(tocopy + off);
KASSERT(cl == 1 &&
tocopy <= ntfs_cntob(1));
DDPRINTF("ntfs_readntvattr_plain: "
"read: cn: 0x%llx cl: %llu, "
"off: %lld, len: %zu, "
"left: %zu\n",
cn, cl, off, tocopy, left);
error = bread(ntmp->ntm_devvp,
ntfs_cntobn(cn),
ntfs_cntob(cl),
&bp);
if (error) {
brelse(bp);
return (error);
}
if (uio) {
error = uiomove(bp->b_data + off,
tocopy, uio);
if (error != 0)
break;
} else {
memcpy(data, bp->b_data + off,
tocopy);
}
brelse(bp);
data = data + tocopy;
*initp += tocopy;
off = 0;
left -= tocopy;
cn += cl;
ccl -= cl;
}
} else {
tocopy = MIN(left, ntfs_cntob(ccl) - off);
DDPRINTF("ntfs_readntvattr_plain: hole: "
"ccn: 0x%llx ccl: %llu, off: %lld, "
"len: %zu, left: %zu\n",
ccn, ccl, off, tocopy, left);
left -= tocopy;
off = 0;
if (uio) {
size_t remains = tocopy;
for(; remains; remains--) {
error = uiomove("", 1, uio);
if (error != 0)
break;
}
} else
bzero(data, tocopy);
data = data + tocopy;
}
cnt++;
if (error != 0)
break;
}
if (left && error == 0) {
printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n");
error = E2BIG;
}
} else {
DDPRINTF("ntfs_readnvattr_plain: data is in mft record\n");
if (uio)
error = uiomove(vap->va_datap + roff, rsize, uio);
else
memcpy(rdata, vap->va_datap + roff, rsize);
*initp += rsize;
}
return (error);
}
/*
* This is one of read routines.
*/
int
ntfs_readattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
u_int32_t attrnum, char *attrname, off_t roff, size_t rsize, void *rdata,
size_t *initp, struct uio *uio)
{
size_t init;
int error = 0;
off_t off = roff;
size_t left = rsize, toread;
caddr_t data = rdata;
struct ntvattr *vap;
*initp = 0;
while (left) {
error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
ntfs_btocn(off), &vap);
if (error)
return (error);
toread = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off);
DDPRINTF("ntfs_readattr_plain: o: %lld, s: %zu "
"(%llu - %llu)\n", off, toread,
vap->va_vcnstart, vap->va_vcnend);
error = ntfs_readntvattr_plain(ntmp, ip, vap,
off - ntfs_cntob(vap->va_vcnstart),
toread, data, &init, uio);
if (error) {
printf("ntfs_readattr_plain: ntfs_readntvattr_plain "
"failed: o: %lld, s: %zu\n", off, toread);
printf("ntfs_readattr_plain: attrib: %llu - %llu\n",
vap->va_vcnstart, vap->va_vcnend);
ntfs_ntvattrrele(vap);
break;
}
ntfs_ntvattrrele(vap);
left -= toread;
off += toread;
data = data + toread;
*initp += init;
}
return (error);
}
/*
* This is one of read routines.
*/
int
ntfs_readattr(struct ntfsmount *ntmp, struct ntnode *ip, u_int32_t attrnum,
char *attrname, off_t roff, size_t rsize, void *rdata, struct uio *uio)
{
int error = 0;
struct ntvattr *vap;
size_t init;
DDPRINTF("ntfs_readattr: reading %u: 0x%x, from %lld size %zu bytes\n",
ip->i_number, attrnum, roff, rsize);
error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
if (error)
return (error);
if ((roff > vap->va_datalen) ||
(roff + rsize > vap->va_datalen)) {
printf("ntfs_readattr: offset too big: %lld (%lld) > %llu\n",
roff, roff + rsize, vap->va_datalen);
ntfs_ntvattrrele(vap);
return (E2BIG);
}
if (vap->va_compression && vap->va_compressalg) {
u_int8_t *cup;
u_int8_t *uup;
off_t off = roff;
caddr_t data = rdata;
cn_t cn;
size_t left = rsize, tocopy;
DDPRINTF("ntfs_ntreadattr: compression: %u\n",
vap->va_compressalg);
cup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL), M_NTFSDECOMP,
M_WAITOK);
uup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL), M_NTFSDECOMP,
M_WAITOK);
cn = (ntfs_btocn(roff)) & (~(NTFS_COMPUNIT_CL - 1));
off = roff - ntfs_cntob(cn);
while (left) {
error = ntfs_readattr_plain(ntmp, ip, attrnum,
attrname, ntfs_cntob(cn),
ntfs_cntob(NTFS_COMPUNIT_CL),
cup, &init, NULL);
if (error)
break;
tocopy = MIN(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off);
if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) {
if (uio)
error = uiomove(cup + off, tocopy, uio);
else
memcpy(data, cup + off, tocopy);
} else if (init == 0) {
if (uio) {
size_t remains = tocopy;
for(; remains; remains--) {
error = uiomove("", 1, uio);
if (error != 0)
break;
}
}
else
bzero(data, tocopy);
} else {
error = ntfs_uncompunit(ntmp, uup, cup);
if (error)
break;
if (uio)
error = uiomove(uup + off, tocopy, uio);
else
memcpy(data, uup + off, tocopy);
}
if (error)
break;
left -= tocopy;
data = data + tocopy;
off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL);
cn += NTFS_COMPUNIT_CL;
}
free(uup, M_NTFSDECOMP, 0);
free(cup, M_NTFSDECOMP, 0);
} else
error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
roff, rsize, rdata, &init, uio);
ntfs_ntvattrrele(vap);
return (error);
}
#if UNUSED_CODE
int
ntfs_parserun(cn_t *cn, cn_t *cl, u_int8_t *run, u_long len, u_long *off)
{
u_int8_t sz;
int i;
if (NULL == run) {
printf("ntfs_parsetun: run == NULL\n");
return (EINVAL);
}
sz = run[(*off)++];
if (0 == sz) {
printf("ntfs_parserun: trying to go out of run\n");
return (E2BIG);
}
*cl = 0;
if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
printf("ntfs_parserun: " \
"bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
sz, len, *off);
return (EINVAL);
}
for (i = 0; i < (sz & 0xF); i++)
*cl += (u_int32_t) run[(*off)++] << (i << 3);
sz >>= 4;
if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
printf("ntfs_parserun: " \
"bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
sz, len, *off);
return (EINVAL);
}
for (i = 0; i < (sz & 0xF); i++)
*cn += (u_int32_t) run[(*off)++] << (i << 3);
return (0);
}
#endif
/*
* Process fixup routine on given buffer.
*/
int
ntfs_procfixups(struct ntfsmount *ntmp, u_int32_t magic, caddr_t buf,
size_t len)
{
struct fixuphdr *fhp = (struct fixuphdr *) buf;
int i;
u_int16_t fixup;
u_int16_t *fxp;
u_int16_t *cfxp;
if (fhp->fh_magic != magic) {
printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n",
fhp->fh_magic, magic);
return (EINVAL);
}
if ((fhp->fh_fnum - 1) * ntmp->ntm_bps != len) {
printf("ntfs_procfixups: " \
"bad fixups number: %d for %ld bytes block\n",
fhp->fh_fnum, (long)len); /* XXX printf kludge */
return (EINVAL);
}
if (fhp->fh_foff >= ntmp->ntm_spc * ntmp->ntm_mftrecsz * ntmp->ntm_bps) {
printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff);
return (EINVAL);
}
fxp = (u_int16_t *) (buf + fhp->fh_foff);
cfxp = (u_int16_t *) (buf + ntmp->ntm_bps - 2);
fixup = *fxp++;
for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
if (*cfxp != fixup) {
printf("ntfs_procfixups: fixup %d doesn't match\n", i);
return (EINVAL);
}
*cfxp = *fxp;
cfxp = (u_int16_t *)((caddr_t)cfxp + ntmp->ntm_bps);
}
return (0);
}
#if UNUSED_CODE
int
ntfs_runtocn(cn_t *cn, struct ntfsmount *ntmp, u_int8_t *run, u_long len,
cn_t vcn)
{
cn_t ccn = 0;
cn_t ccl = 0;
u_long off = 0;
int error = 0;
#if NTFS_DEBUG
int i;
printf("ntfs_runtocn: run: %p, %ld bytes, vcn:%ld\n",
run, len, (u_long) vcn);
printf("ntfs_runtocn: run: ");
for (i = 0; i < len; i++)
printf("0x%02x ", run[i]);
printf("\n");
#endif
if (NULL == run) {
printf("ntfs_runtocn: run == NULL\n");
return (EINVAL);
}
do {
if (run[off] == 0) {
printf("ntfs_runtocn: vcn too big\n");
return (E2BIG);
}
vcn -= ccl;
error = ntfs_parserun(&ccn, &ccl, run, len, &off);
if (error) {
printf("ntfs_runtocn: ntfs_parserun failed\n");
return (error);
}
} while (ccl <= vcn);
*cn = ccn + vcn;
return (0);
}
#endif
/*
* if the ntfs_toupper_tab[] is filled already, just raise use count;
* otherwise read the data from the filesystem we are currently mounting
*/
int
ntfs_toupper_use(struct mount *mp, struct ntfsmount *ntmp, struct proc *p)
{
int error = 0;
struct vnode *vp;
/* get exclusive access */
rw_enter_write(&ntfs_toupper_lock);
/* only read the translation data from a file if it hasn't been
* read already */
if (ntfs_toupper_tab)
goto out;
/*
* Read in Unicode lowercase -> uppercase translation file.
* XXX for now, just the first 256 entries are used anyway,
* so don't bother reading more
*/
ntfs_toupper_tab = malloc(256 * 256 * sizeof(wchar), M_NTFSRDATA,
M_WAITOK);
if ((error = VFS_VGET(mp, NTFS_UPCASEINO, &vp)))
goto out;
error = ntfs_readattr(ntmp, VTONT(vp), NTFS_A_DATA, NULL,
0, 256*256*sizeof(wchar), (char *) ntfs_toupper_tab,
NULL);
vput(vp);
out:
ntfs_toupper_usecount++;
rw_exit_write(&ntfs_toupper_lock);
return (error);
}
/*
* lower the use count and if it reaches zero, free the memory
* tied by toupper table
*/
void
ntfs_toupper_unuse(struct proc *p)
{
/* get exclusive access */
rw_enter_write(&ntfs_toupper_lock);
ntfs_toupper_usecount--;
if (ntfs_toupper_usecount == 0) {
free(ntfs_toupper_tab, M_NTFSRDATA, 0);
ntfs_toupper_tab = NULL;
}
#ifdef DIAGNOSTIC
else if (ntfs_toupper_usecount < 0) {
panic("ntfs_toupper_unuse(): use count negative: %d",
ntfs_toupper_usecount);
}
#endif
/* release the lock */
rw_exit_write(&ntfs_toupper_lock);
}
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