mirror/freebsd
1
0
Fork 0
mirror of https://git.FreeBSD.org/src.git synced 2024-12-28 11:57:28 +00:00
Code Issues Releases Activity
57c801f5cf
freebsd/sys/ntfs/ntfs_subr.c
Semen Ustimenko 5ada11aa72 Added limited write ability. Now we can use some kind 
of files for swap holders. See mount_ntfs..8 for details.
1999-02-19 12:31:02 +00:00

1704 lines
40 KiB
C
Raw Blame History

/*-
* Copyright (c) 1998, 1999 Semen Ustimenko
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: ntfs_subr.c,v 1.9 1999/02/02 01:54:54 semen Exp $
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/buf.h>
#include <sys/file.h>
#include <sys/malloc.h>
#include <machine/clock.h>
#include <miscfs/specfs/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_extern.h>
#include <ntfs/ntfs_subr.h>
#include <ntfs/ntfs_compr.h>
#include <ntfs/ntfs_ihash.h>
#if __FreeBSD_version >= 300000
MALLOC_DEFINE(M_NTFSNTVATTR, "NTFS vattr", "NTFS file attribute information");
MALLOC_DEFINE(M_NTFSRDATA, "NTFS res data", "NTFS resident data");
MALLOC_DEFINE(M_NTFSRUN, "NTFS vrun", "NTFS vrun storage");
MALLOC_DEFINE(M_NTFSDECOMP, "NTFS decomp", "NTFS decompression temporary");
#endif
int
ntfs_ntvattrrele(
struct ntvattr * vap)
{
dprintf(("ntfs_ntvattrrele: ino: %d, type: 0x%x\n",
vap->va_ip->i_number, vap->va_type));
ntfs_ntrele(vap->va_ip);
return (0);
}
int
ntfs_ntvattrget(
struct ntfsmount * ntmp,
struct ntnode * ip,
u_int32_t type,
char *name,
cn_t vcn,
struct ntvattr ** vapp)
{
int error;
struct ntvattr *vap;
struct ntvattr *lvap = NULL;
struct attr_attrlist *aalp;
struct attr_attrlist *nextaalp;
caddr_t alpool;
int len, namelen;
*vapp = NULL;
if (name) {
dprintf(("ntfs_ntvattrget: " \
"ino: %d, type: 0x%x, name: %s, vcn: %d\n", \
ip->i_number, type, name, (u_int32_t) vcn));
namelen = strlen(name);
} else {
dprintf(("ntfs_ntvattrget: " \
"ino: %d, type: 0x%x, vcn: %d\n", \
ip->i_number, type, (u_int32_t) vcn));
name = "";
namelen = 0;
}
if((ip->i_flag & IN_LOADED) == 0) {
dprintf(("ntfs_ntvattrget: node not loaded, ino: %d\n",
ip->i_number));
error = ntfs_loadntnode(ntmp,ip);
if(error) {
printf("ntfs_ntvattrget: FAILED TO LOAD INO: %d\n",
ip->i_number);
return (error);
}
}
for (vap = ip->i_vattrp; vap; vap = vap->va_nextp) {
ddprintf(("type: 0x%x, vcn: %d - %d\n", \
vap->va_type, (u_int32_t) vap->va_vcnstart, \
(u_int32_t) 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))) {
*vapp = vap;
ntfs_ntref(vap->va_ip);
return (0);
}
if (vap->va_type == NTFS_A_ATTRLIST)
lvap = vap;
}
if (!lvap) {
dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
"ino: %d, type: 0x%x, name: %s, vcn: %d\n", \
ip->i_number, type, name, (u_int32_t) vcn));
return (ENOENT);
}
/* Scan $ATTRIBUTE_LIST for requested attribute */
len = lvap->va_datalen;
MALLOC(alpool, caddr_t, len, M_TEMP, M_WAITOK);
error = ntfs_readntvattr_plain(ntmp, ip, lvap, 0, len, alpool, &len);
if (error)
goto out;
aalp = (struct attr_attrlist *) alpool;
nextaalp = NULL;
while (len > 0) {
dprintf(("ntfs_ntvattrget: " \
"attrlist: ino: %d, attr: 0x%x, vcn: %d\n", \
aalp->al_inumber, aalp->al_type, \
(u_int32_t) aalp->al_vcnstart));
if (len > aalp->reclen) {
nextaalp = NTFS_NEXTREC(aalp, struct attr_attrlist *);
} else {
nextaalp = NULL;
}
len -= aalp->reclen;
#define AALPCMP(aalp,type,name,namelen) ( \
(aalp->al_type == type) && (aalp->al_namelen == namelen) && \
!uastrcmp(aalp->al_name,aalp->al_namelen,name,namelen) )
if (AALPCMP(aalp, type, name, namelen) &&
(!nextaalp || (nextaalp->al_vcnstart > vcn) ||
!AALPCMP(nextaalp, type, name, namelen))) {
struct vnode *newvp;
struct ntnode *newip;
dprintf(("ntfs_ntvattrget: attrbute in ino: %d\n",
aalp->al_inumber));
error = VFS_VGET(ntmp->ntm_mountp, aalp->al_inumber,
&newvp);
if (error) {
printf("ntfs_ntvattrget: CAN'T VGET INO: %d\n",
aalp->al_inumber);
goto out;
}
newip = VTONT(newvp);
if(~newip->i_flag & IN_LOADED) {
dprintf(("ntfs_ntvattrget: node not loaded," \
" ino: %d\n", newip->i_number));
error = ntfs_loadntnode(ntmp,ip);
if(error) {
printf("ntfs_ntvattrget: CAN'T LOAD " \
"INO: %d\n", newip->i_number);
vput(newvp);
goto out;
}
}
for (vap = newip->i_vattrp; vap; vap = vap->va_nextp) {
if ((vap->va_type == type) &&
(vap->va_vcnstart <= vcn) &&
(vap->va_vcnend >= vcn) &&
(vap->va_namelen == namelen) &&
(!strncmp(name, vap->va_name, namelen))) {
*vapp = vap;
ntfs_ntref(vap->va_ip);
vput(newvp);
error = 0;
goto out;
}
if (vap->va_type == NTFS_A_ATTRLIST)
lvap = vap;
}
printf("ntfs_ntvattrget: ATTRLIST ERROR.\n");
vput(newvp);
break;
}
#undef AALPCMP
aalp = nextaalp;
}
error = ENOENT;
dprintf(("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: " \
"ino: %d, type: 0x%x, name: %s, vcn: %d\n", \
ip->i_number, type, name, (u_int32_t) vcn));
out:
FREE(alpool, M_TEMP);
return (error);
}
int
ntfs_loadntnode(
struct ntfsmount * ntmp,
struct ntnode * ip)
{
struct filerec *mfrp;
daddr_t bn;
int error,off;
struct attr *ap;
struct ntvattr**vapp;
dprintf(("ntfs_loadnode: loading ino: %d\n",ip->i_number));
MALLOC(mfrp, struct filerec *, ntfs_bntob(ntmp->ntm_bpmftrec),
M_TEMP, M_WAITOK);
if (ip->i_number < NTFS_SYSNODESNUM) {
struct buf *bp;
dprintf(("ntfs_loadnode: 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),
NOCRED, &bp);
if (error) {
printf("ntfs_loadnode: BREAD FAILED\n");
brelse(bp);
goto out;
}
memcpy(mfrp, bp->b_data, ntfs_bntob(ntmp->ntm_bpmftrec));
bqrelse(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);
if (error) {
printf("ntfs_loadnode: 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_loadnode: BAD MFT RECORD %d\n",
(u_int32_t) ip->i_number);
goto out;
}
dprintf(("ntfs_loadnode: load attrs for ino: %d\n",ip->i_number));
off = mfrp->fr_attroff;
ap = (struct attr *) ((caddr_t)mfrp + off);
if (ip->i_vattrp)
printf("ntfs_ntloadnode: WARNING! already loaded?\n");
vapp = &ip->i_vattrp;
while (ap->a_hdr.a_type != -1) {
error = ntfs_attrtontvattr(ntmp, vapp, ap);
if (error)
break;
(*vapp)->va_ip = ip;
vapp = &((*vapp)->va_nextp);
off += ap->a_hdr.reclen;
ap = (struct attr *) ((caddr_t)mfrp + off);
}
if (error) {
printf("ntfs_loadnode: 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;
out:
FREE(mfrp, M_TEMP);
return (error);
}
static int ntfs_ntnode_hash_lock;
int
ntfs_ntget(
struct ntfsmount * ntmp,
ino_t ino,
struct ntnode ** ipp)
{
struct ntnode *ip;
dprintf(("ntfs_ntget: ntget ntnode %d\n", ino));
*ipp = NULL;
restart:
ip = ntfs_nthashlookup(ntmp->ntm_dev, ino);
if (ip) {
ip->i_usecount++;
*ipp = ip;
dprintf(("ntfs_ntget: ntnode %d: %p, usecount: %d\n",
ino, ip, ip->i_usecount));
return (0);
}
if (ntfs_ntnode_hash_lock) {
printf("waiting for hash_lock to free...\n");
while(ntfs_ntnode_hash_lock) {
ntfs_ntnode_hash_lock = -1;
tsleep(&ntfs_ntnode_hash_lock, PVM, "ntfsntgt", 0);
}
printf("hash_lock freeed\n");
goto restart;
}
ntfs_ntnode_hash_lock = 1;
MALLOC(ip, struct ntnode *, sizeof(struct ntnode),
M_NTFSNTNODE, M_WAITOK);
ddprintf(("ntfs_ntget: allocating ntnode: %d: %p\n", ino, ip));
bzero((caddr_t) ip, sizeof(struct ntnode));
/* Generic initialization */
ip->i_number = ino;
ip->i_mp = ntmp;
ip->i_dev = ntmp->ntm_dev;
ip->i_uid = ntmp->ntm_uid;
ip->i_gid = ntmp->ntm_gid;
ip->i_mode = ntmp->ntm_mode;
ip->i_usecount++;
LIST_INIT(&ip->i_fnlist);
ntfs_nthashins(ip);
if (ntfs_ntnode_hash_lock < 0)
wakeup(&ntfs_ntnode_hash_lock);
ntfs_ntnode_hash_lock = 0;
*ipp = ip;
dprintf(("ntfs_ntget: ntnode %d: %p, usecount: %d\n",
ino, ip, ip->i_usecount));
return (0);
}
void
ntfs_ntrele(
struct ntnode * ip)
{
struct ntvattr *vap;
dprintf(("ntfs_ntrele: rele ntnode %d: %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 \n",
ip->i_number,ip->i_usecount);
} else if (ip->i_usecount == 0) {
dprintf(("ntfs_ntrele: deallocating ntnode: %d\n",
ip->i_number));
if (ip->i_fnlist.lh_first)
panic("ntfs_ntrele: ntnode has fnodes\n");
ntfs_nthashrem(ip);
while (ip->i_vattrp) {
vap = ip->i_vattrp;
ip->i_vattrp = vap->va_nextp;
ntfs_freentvattr(vap);
}
FREE(ip, M_NTFSNTNODE);
}
dprintf(("ntfs_ntrele: rele ok\n"));
}
void
ntfs_freentvattr(
struct ntvattr * vap)
{
if (vap->va_flag & NTFS_AF_INRUN) {
if (vap->va_vruncn)
FREE(vap->va_vruncn, M_NTFSRUN);
if (vap->va_vruncl)
FREE(vap->va_vruncl, M_NTFSRUN);
} else {
if (vap->va_datap)
FREE(vap->va_datap, M_NTFSRDATA);
}
FREE(vap, M_NTFSNTVATTR);
}
int
ntfs_attrtontvattr(
struct ntfsmount * ntmp,
struct ntvattr ** rvapp,
struct attr * rap)
{
int error, i;
struct ntvattr *vap;
error = 0;
*rvapp = NULL;
MALLOC(vap, struct ntvattr *, sizeof(struct ntvattr),
M_NTFSNTVATTR, M_WAITOK);
bzero(vap, sizeof(struct ntvattr));
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: %d", 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);
MALLOC(vap->va_datap, caddr_t, 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: %d", vap->va_datalen));
if (error)
FREE(vap, M_NTFSNTVATTR);
else
*rvapp = vap;
ddprintf(("\n"));
return (error);
}
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;
i = 0;
while (run[off]) {
off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1;
cnt++;
}
MALLOC(cn, cn_t *, cnt * sizeof(cn_t), M_NTFSRUN, M_WAITOK);
MALLOC(cl, cn_t *, 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);
}
wchar
ntfs_toupper(
struct ntfsmount * ntmp,
wchar wc)
{
return (ntmp->ntm_upcase[wc & 0xFF]);
}
int
ntfs_uustricmp(
struct ntfsmount * ntmp,
wchar * str1,
int str1len,
wchar * str2,
int str2len)
{
int i;
int res;
for (i = 0; i < str1len && i < str2len; i++) {
res = (int) ntfs_toupper(ntmp, str1[i]) -
(int) ntfs_toupper(ntmp, str2[i]);
if (res)
return res;
}
return (str1len - str2len);
}
int
ntfs_uastricmp(
struct ntfsmount * ntmp,
wchar * str1,
int str1len,
char *str2,
int str2len)
{
int i;
int res;
for (i = 0; i < str1len && i < str2len; i++) {
res = (int) ntfs_toupper(ntmp, str1[i]) -
(int) ntfs_toupper(ntmp, (wchar) str2[i]);
if (res)
return res;
}
return (str1len - str2len);
}
int
ntfs_uastrcmp(
struct ntfsmount * ntmp,
wchar * str1,
int str1len,
char *str2,
int str2len)
{
int i;
int res;
for (i = 0; (i < str1len) && (i < str2len); i++) {
res = ((int) str1[i]) - ((int) str2[i]);
if (res)
return res;
}
return (str1len - str2len);
}
int
ntfs_fget(
struct ntfsmount *ntmp,
struct ntnode *ip,
int attrtype,
char *attrname,
struct fnode **fpp)
{
int error;
struct fnode *fp;
dprintf(("ntfs_fget: ino: %d, attrtype: 0x%x, attrname: %s\n",
ip->i_number,attrtype, attrname?attrname:""));
*fpp = NULL;
for (fp = ip->i_fnlist.lh_first; fp != NULL; fp = fp->f_fnlist.le_next){
dprintf(("ntfs_fget: fnode: attrtype: %d, 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);
MALLOC(fp, struct fnode *, sizeof(struct fnode), M_NTFSFNODE, M_WAITOK);
bzero(fp, sizeof(struct fnode));
dprintf(("ntfs_fget: allocating fnode: %p\n",fp));
fp->f_devvp = ntmp->ntm_devvp;
fp->f_dev = ntmp->ntm_dev;
fp->f_mp = ntmp;
fp->f_ip = ip;
fp->f_attrname = attrname;
if (fp->f_attrname) fp->f_flag |= FN_AATTRNAME;
fp->f_attrtype = attrtype;
if ((fp->f_attrtype == NTFS_A_DATA) && (fp->f_attrname == NULL))
fp->f_flag |= FN_DEFAULT;
else {
error = ntfs_filesize(ntmp, fp, &fp->f_size, &fp->f_allocated);
if (error) {
FREE(fp,M_NTFSFNODE);
return (error);
}
}
ntfs_ntref(ip);
LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist);
*fpp = fp;
return (0);
}
void
ntfs_frele(
struct fnode *fp)
{
struct ntnode *ip = FTONT(fp);
dprintf(("ntfs_frele: fnode: %p for %d: %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);
if (fp->f_dirblbuf)
FREE(fp->f_dirblbuf, M_NTFSDIR);
FREE(fp, M_NTFSFNODE);
ntfs_ntrele(ip);
}
int
ntfs_ntlookupattr(
struct ntfsmount * ntmp,
char * name,
int namelen,
int *attrtype,
char **attrname)
{
char *sys;
int 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++){
if((syslen == adp->ad_namelen) &&
(!strncmp(sys,adp->ad_name,syslen))) {
*attrtype = adp->ad_type;
if(namelen) {
MALLOC((*attrname), char *, namelen,
M_TEMP, M_WAITOK);
memcpy((*attrname), name, namelen);
(*attrname)[namelen] = '\0';
}
return (0);
}
adp++;
}
return (ENOENT);
}
if(namelen) {
MALLOC((*attrname), char *, namelen, M_TEMP, M_WAITOK);
memcpy((*attrname), name, namelen);
(*attrname)[namelen] = '\0';
*attrtype = NTFS_A_DATA;
}
return (0);
}
/*
* Lookup specifed node for filename, matching cnp,
* return fnode filled.
*/
int
ntfs_ntlookup(
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; /* Root attribute */
cn_t cn; /* VCN in current attribute */
caddr_t rdbuf; /* 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;
char *fname,*aname;
u_int32_t aoff;
error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
if (error || (vap->va_flag & NTFS_AF_INRUN))
return (ENOTDIR);
blsize = vap->va_a_iroot->ir_size;
rdsize = vap->va_datalen;
fname = cnp->cn_nameptr;
aname = NULL;
anamelen = 0;
for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
if(fname[fnamelen] == ':') {
aname = fname + fnamelen + 1;
anamelen = cnp->cn_namelen - fnamelen - 1;
dprintf(("ntfs_ntlookup: file %s (%d), attr: %s (%d)\n",
fname, fnamelen, aname, anamelen));
break;
}
dprintf(("ntfs_ntlookup: blocksize: %d, rdsize: %d\n", blsize, rdsize));
MALLOC(rdbuf, caddr_t, blsize, M_TEMP, M_WAITOK);
error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT, "$I30",
0, rdsize, rdbuf);
if (error)
goto fail;
aoff = sizeof(struct attr_indexroot);
do {
iep = (struct attr_indexentry *) (rdbuf + aoff);
while (!(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff)) {
ddprintf(("scan: %d, %d\n",
(u_int32_t) iep->ie_number,
(u_int32_t) iep->ie_fnametype));
res = ntfs_uastricmp(ntmp, iep->ie_fname,
iep->ie_fnamelen, fname,
fnamelen);
if (res == 0) {
/* Matched something (case ins.) */
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) {
int attrtype = NTFS_A_DATA;
char *attrname = NULL;
struct fnode *nfp;
struct vnode *nvp;
if (aname) {
error = ntfs_ntlookupattr(ntmp,
aname, anamelen,
&attrtype, &attrname);
if (error)
goto fail;
}
/* Check if we've found ourself */
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;
goto fail;
}
/* vget node, but don't load it */
error = ntfs_vgetex(ntmp->ntm_mountp,
iep->ie_number,
attrtype,
attrname,
LK_EXCLUSIVE,
VG_DONTLOAD,
curproc,
&nvp);
if(error)
goto fail;
nfp = VTOF(nvp);
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))
nfp->f_type = VDIR;
else
nfp->f_type = VREG;
nvp->v_type = nfp->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;
}
*vpp = nvp;
goto fail;
}
} else if (res > 0)
break;
aoff += iep->reclen;
iep = (struct attr_indexentry *) (rdbuf + aoff);
}
/* Dive if possible */
if (iep->ie_flag & NTFS_IEFLAG_SUBNODE) {
dprintf(("ntfs_ntlookup: diving\n"));
cn = *(cn_t *) (rdbuf + aoff +
iep->reclen - sizeof(cn_t));
rdsize = blsize;
error = ntfs_readattr(ntmp, ip, NTFS_A_INDX, "$I30",
ntfs_cntob(cn), rdsize, rdbuf);
if (error)
goto fail;
error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC,
rdbuf, rdsize);
if (error)
goto fail;
aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
0x18);
} else {
dprintf(("ntfs_ntlookup: nowhere to dive :-(\n"));
error = ENOENT;
break;
}
} while (1);
dprintf(("finish\n"));
fail:
ntfs_ntvattrrele(vap);
FREE(rdbuf, M_TEMP);
return (error);
}
int
ntfs_isnamepermitted(
struct ntfsmount * ntmp,
struct attr_indexentry * iep)
{
if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES)
return 1;
switch (iep->ie_fnametype) {
case 2:
ddprintf(("ntfs_isnamepermitted: skiped DOS name\n"));
return 0;
case 0:
case 1:
case 3:
return 1;
default:
printf("ntfs_isnamepermitted: " \
"WARNING! Unknown file name type: %d\n",
iep->ie_fnametype);
break;
}
return 0;
}
int
ntfs_ntreaddir(
struct ntfsmount * ntmp,
struct fnode * fp,
u_int32_t num,
struct attr_indexentry ** riepp)
{
struct ntnode *ip = FTONT(fp);
struct ntvattr *vap = NULL; /* IndexRoot attribute */
struct ntvattr *bmvap = NULL; /* BitMap attribute */
struct ntvattr *iavap = NULL; /* IndexAllocation attribute */
caddr_t rdbuf; /* Buffer to read directory's blocks */
u_char *bmp = NULL; /* Bitmap */
u_int32_t blsize; /* Index allocation size (2048) */
u_int32_t rdsize; /* Length of data to read */
u_int32_t attrnum; /* Current attribute type */
u_int32_t cpbl = 1; /* Clusters per directory block */
u_int32_t blnum;
struct attr_indexentry *iep;
int error = ENOENT;
u_int32_t aoff, cnum;
dprintf(("ntfs_ntreaddir: read ino: %d, num: %d\n", ip->i_number, num));
error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT, "$I30", 0, &vap);
if (error)
return (ENOTDIR);
if (fp->f_dirblbuf == NULL) {
fp->f_dirblsz = vap->va_a_iroot->ir_size;
MALLOC(fp->f_dirblbuf, caddr_t,
max(vap->va_datalen,fp->f_dirblsz), M_NTFSDIR, M_WAITOK);
}
blsize = fp->f_dirblsz;
rdbuf = fp->f_dirblbuf;
dprintf(("ntfs_ntreaddir: rdbuf: 0x%p, blsize: %d\n", rdbuf, blsize));
if (vap->va_a_iroot->ir_flag & NTFS_IRFLAG_INDXALLOC) {
error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP, "$I30",
0, &bmvap);
if (error) {
error = ENOTDIR;
goto fail;
}
MALLOC(bmp, u_char *, bmvap->va_datalen, M_TEMP, M_WAITOK);
error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP, "$I30", 0,
bmvap->va_datalen, bmp);
if (error)
goto fail;
error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX, "$I30",
0, &iavap);
if (error) {
error = ENOTDIR;
goto fail;
}
cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1);
dprintf(("ntfs_ntreaddir: indexalloc: %d, cpbl: %d\n",
iavap->va_datalen, cpbl));
} else {
dprintf(("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n"));
iavap = bmvap = NULL;
bmp = NULL;
}
/* Try use previous values */
if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
attrnum = fp->f_lastdattr;
aoff = fp->f_lastdoff;
blnum = fp->f_lastdblnum;
cnum = fp->f_lastdnum;
} else {
attrnum = NTFS_A_INDXROOT;
aoff = sizeof(struct attr_indexroot);
blnum = 0;
cnum = 0;
}
do {
dprintf(("ntfs_ntreaddir: scan: 0x%x, %d, %d, %d, %d\n",
attrnum, (u_int32_t) blnum, cnum, num, aoff));
rdsize = (attrnum == NTFS_A_INDXROOT) ? vap->va_datalen : blsize;
error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
ntfs_cntob(blnum * cpbl), rdsize, rdbuf);
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);
while (!(iep->ie_flag & NTFS_IEFLAG_LAST) && (rdsize > aoff)) {
if (ntfs_isnamepermitted(ntmp, iep)) {
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++;
}
aoff += iep->reclen;
iep = (struct attr_indexentry *) (rdbuf + aoff);
}
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 & 3)))
break;
blnum++;
}
attrnum = NTFS_A_INDX;
aoff = 0;
if (ntfs_cntob(blnum * cpbl) >= iavap->va_datalen)
break;
dprintf(("ntfs_ntreaddir: blnum: %d\n", (u_int32_t) 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);
return (error);
}
/*
* #undef dprintf #define dprintf(a)
*/
struct timespec
ntfs_nttimetounix(
u_int64_t nt)
{
struct timespec t;
/* WindowNT 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);
}
int
ntfs_times(
struct ntfsmount * ntmp,
struct ntnode * ip,
ntfs_times_t * tm)
{
struct ntvattr *vap;
int error;
dprintf(("ntfs_times: ino: %d...\n", ip->i_number));
error = ntfs_ntvattrget(ntmp, ip, NTFS_A_NAME, NULL, 0, &vap);
if (error)
return (error);
*tm = vap->va_a_name->n_times;
ntfs_ntvattrrele(vap);
return (0);
}
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: %d\n", ip->i_number));
if (fp->f_flag & FN_DEFAULT) {
error = ntfs_ntvattrget(ntmp, ip,
NTFS_A_DATA, NULL, 0, &vap);
} else {
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: %d bytes (%d bytes allocated)\n",
(u_int32_t) sz, (u_int32_t) bn));
if (size)
*size = sz;
if (bytes)
*bytes = bn;
ntfs_ntvattrrele(vap);
return (0);
}
int
ntfs_writeattr_plain(
struct ntfsmount * ntmp,
struct ntnode * ip,
u_int32_t attrnum,
char *attrname,
off_t roff,
size_t rsize,
void *rdata,
size_t * initp)
{
size_t init;
int error = 0;
off_t off = roff, left = rsize, towrite;
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);
towrite = min(left, ntfs_cntob(vap->va_vcnend + 1) - off);
ddprintf(("ntfs_writeattr_plain: o: %d, s: %d (%d - %d)\n",
(u_int32_t) off, (u_int32_t) towrite,
(u_int32_t) vap->va_vcnstart,
(u_int32_t) vap->va_vcnend));
error = ntfs_writentvattr_plain(ntmp, ip, vap,
off - ntfs_cntob(vap->va_vcnstart),
towrite, data, &init);
if (error) {
printf("ntfs_writeattr_plain: " \
"ntfs_writentvattr_plain failed: o: %d, s: %d\n",
(u_int32_t) off, (u_int32_t) towrite);
printf("ntfs_writeattr_plain: attrib: %d - %d\n",
(u_int32_t) vap->va_vcnstart,
(u_int32_t) vap->va_vcnend);
ntfs_ntvattrrele(vap);
break;
}
ntfs_ntvattrrele(vap);
left -= towrite;
off += towrite;
data = data + towrite;
*initp += init;
}
return (error);
}
int
ntfs_writentvattr_plain(
struct ntfsmount * ntmp,
struct ntnode * ip,
struct ntvattr * vap,
off_t roff,
size_t rsize,
void *rdata,
size_t * initp)
{
int error = 0;
int off;
*initp = 0;
if (vap->va_flag & NTFS_AF_INRUN) {
int cnt;
cn_t ccn, ccl, cn, left, cl;
caddr_t data = rdata;
struct buf *bp;
size_t tocopy;
ddprintf(("ntfs_writentvattr_plain: data in run: %d 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_writentvattr_plain: " \
"left %d, cn: 0x%x, cl: %d, off: %d\n", \
(u_int32_t) left, (u_int32_t) ccn, \
(u_int32_t) ccl, (u_int32_t) off));
if (ntfs_cntob(ccl) < off) {
off -= ntfs_cntob(ccl);
cnt++;
continue;
}
if (ccn || ip->i_number == NTFS_BOOTINO) { /* XXX */
ccl -= ntfs_btocn(off);
cn = ccn + ntfs_btocn(off);
off = ntfs_btocnoff(off);
while (left && ccl) {
tocopy = min(left,
min(ntfs_cntob(ccl) - off,
MAXBSIZE - off));
cl = ntfs_btocl(tocopy + off);
ddprintf(("ntfs_writentvattr_plain: " \
"write: cn: 0x%x cl: %d, " \
"off: %d len: %d, left: %d\n",
(u_int32_t) cn,
(u_int32_t) cl,
(u_int32_t) off,
(u_int32_t) tocopy,
(u_int32_t) left));
if ((off == 0) &&
(tocopy == ntfs_cntob(cl))) {
bp = getblk(ntmp->ntm_devvp,
ntfs_cntobn(cn),
ntfs_cntob(cl),
0, 0);
clrbuf(bp);
} else {
error = bread(ntmp->ntm_devvp,
ntfs_cntobn(cn),
ntfs_cntob(cl),
NOCRED, &bp);
if (error) {
brelse(bp);
return (error);
}
}
memcpy(bp->b_data + off, data, tocopy);
bwrite(bp);
data = data + tocopy;
*initp += tocopy;
off = 0;
left -= tocopy;
cn += cl;
ccl -= cl;
}
}
cnt++;
}
if (left) {
printf("ntfs_writentvattr_plain: POSSIBLE RUN ERROR\n");
error = EINVAL;
}
} else {
printf("ntfs_writevattr_plain: CAN'T WRITE RES. ATTRIBUTE\n");
error = ENOTTY;
}
return (error);
}
int
ntfs_readntvattr_plain(
struct ntfsmount * ntmp,
struct ntnode * ip,
struct ntvattr * vap,
off_t roff,
size_t rsize,
void *rdata,
size_t * initp)
{
int error = 0;
int off;
*initp = 0;
if (vap->va_flag & NTFS_AF_INRUN) {
int cnt;
cn_t ccn, ccl, cn, left, cl;
caddr_t data = rdata;
struct buf *bp;
size_t tocopy;
ddprintf(("ntfs_readntvattr_plain: data in run: %d 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 %d, cn: 0x%x, cl: %d, off: %d\n", \
(u_int32_t) left, (u_int32_t) ccn, \
(u_int32_t) ccl, (u_int32_t) off));
if (ntfs_cntob(ccl) < off) {
off -= ntfs_cntob(ccl);
cnt++;
continue;
}
if (ccn || ip->i_number == NTFS_BOOTINO) { /* XXX */
ccl -= ntfs_btocn(off);
cn = ccn + ntfs_btocn(off);
off = ntfs_btocnoff(off);
while (left && ccl) {
tocopy = min(left,
min(ntfs_cntob(ccl) - off,
MAXBSIZE - off));
cl = ntfs_btocl(tocopy + off);
ddprintf(("ntfs_readntvattr_plain: " \
"read: cn: 0x%x cl: %d, " \
"off: %d len: %d, left: %d\n",
(u_int32_t) cn,
(u_int32_t) cl,
(u_int32_t) off,
(u_int32_t) tocopy,
(u_int32_t) left));
error = bread(ntmp->ntm_devvp,
ntfs_cntobn(cn),
ntfs_cntob(cl),
NOCRED, &bp);
if (error) {
brelse(bp);
return (error);
}
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: "
"sparce: ccn: 0x%x ccl: %d, off: %d, " \
" len: %d, left: %d\n",
(u_int32_t) ccn, (u_int32_t) ccl,
(u_int32_t) off, (u_int32_t) tocopy,
(u_int32_t) left));
left -= tocopy;
off = 0;
bzero(data, tocopy);
data = data + tocopy;
}
cnt++;
}
if (left) {
printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n");
error = E2BIG;
}
} else {
ddprintf(("ntfs_readnvattr_plain: data is in mft record\n"));
memcpy(rdata, vap->va_datap + roff, rsize);
*initp += rsize;
}
return (error);
}
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)
{
size_t init;
int error = 0;
off_t off = roff, 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: %d, s: %d (%d - %d)\n",
(u_int32_t) off, (u_int32_t) toread,
(u_int32_t) vap->va_vcnstart,
(u_int32_t) vap->va_vcnend));
error = ntfs_readntvattr_plain(ntmp, ip, vap,
off - ntfs_cntob(vap->va_vcnstart),
toread, data, &init);
if (error) {
printf("ntfs_readattr_plain: " \
"ntfs_readntvattr_plain failed: o: %d, s: %d\n",
(u_int32_t) off, (u_int32_t) toread);
printf("ntfs_readattr_plain: attrib: %d - %d\n",
(u_int32_t) vap->va_vcnstart,
(u_int32_t) vap->va_vcnend);
ntfs_ntvattrrele(vap);
break;
}
ntfs_ntvattrrele(vap);
left -= toread;
off += toread;
data = data + toread;
*initp += init;
}
return (error);
}
int
ntfs_readattr(
struct ntfsmount * ntmp,
struct ntnode * ip,
u_int32_t attrnum,
char *attrname,
off_t roff,
size_t rsize,
void *rdata)
{
int error = 0;
struct ntvattr *vap;
size_t init;
ddprintf(("ntfs_readattr: reading %d: 0x%x, from %d size %d bytes\n",
ip->i_number, attrnum, (u_int32_t) roff, (u_int32_t) rsize));
error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
if (error)
return (error);
if ((roff > vap->va_datalen) ||
(roff + rsize > vap->va_datalen)) {
ddprintf(("ntfs_readattr: offset too big\n"));
ntfs_ntvattrrele(vap);
return (E2BIG);
}
if (vap->va_compression && vap->va_compressalg) {
u_int8_t *cup;
u_int8_t *uup;
off_t off = roff, left = rsize, tocopy;
caddr_t data = rdata;
cn_t cn;
ddprintf(("ntfs_ntreadattr: compression: %d\n",
vap->va_compressalg));
MALLOC(cup, u_int8_t *, ntfs_cntob(NTFS_COMPUNIT_CL),
M_NTFSDECOMP, M_WAITOK);
MALLOC(uup, u_int8_t *, 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);
if (error)
break;
tocopy = min(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off);
if (init == ntfs_cntob(NTFS_COMPUNIT_CL)) {
memcpy(data, cup + off, tocopy);
} else if (init == 0) {
bzero(data, tocopy);
} else {
error = ntfs_uncompunit(ntmp, uup, cup);
if (error)
break;
memcpy(data, uup + off, tocopy);
}
left -= tocopy;
data = data + tocopy;
off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL);
cn += NTFS_COMPUNIT_CL;
}
FREE(uup, M_NTFSDECOMP);
FREE(cup, M_NTFSDECOMP);
} else
error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
roff, rsize, rdata, &init);
ntfs_ntvattrrele(vap);
return (error);
}
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);
}
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 %d bytes block\n",
fhp->fh_fnum, len);
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;
((caddr_t) cfxp) += ntmp->ntm_bps;
}
return (0);
}
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: 0x%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);
}
Reference in New Issue View Git Blame Copy Permalink