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asmkernel.c
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/*
*
* Apache License
* Version 2.0, January 2004
* http://www.apache.org/licenses/
*/
#include "asmkernel.h"
#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#include <string.h>
void printDate(FILE *fp)
{
time_t now = time(0);
struct tm *ptm = localtime(&now);
fprintf(fp,
"%04d-%02d-%02d %02d:%02d:%02d\n",
ptm->tm_year + 1900,
ptm->tm_mon + 1,
ptm->tm_mday,
ptm->tm_hour,
ptm->tm_min,
ptm->tm_sec);
}
void printBlock(FILE *fp,unsigned char *buf,size_t len)
{
size_t i=0;
unsigned char tempbuf[17];
tempbuf[16]='\0';
fprintf(fp,
" /0x : -0-1 -2-3 -4-5 -6-7 -8-9 -a-b -c-d -e-f 0123456789abcdef\n");
fprintf(fp,
"-----/----: --------------------------------------- ----------------\n");
for(i=0;i<len;i++)
{
if (i % 16 == 0)
{
if (i > 0)
{
fprintf(fp," %s",tempbuf);
fprintf(fp,"\n");
}
if (i > 0 && i % 256 == 0)
{
fprintf(fp,"\n");
fprintf(fp,
" /0x : -0-1 -2-3 -4-5 -6-7 -8-9 -a-b -c-d -e-f 0123456789abcdef\n");
fprintf(fp,
"-----/----: --------------------------------------- ----------------\n");
}
fprintf(fp,"%05d/%04x:",i,i);
}
if (i % 2 == 0)
{
fprintf(fp," ");
}
fprintf(fp,"%x%x",(buf[i] >> 4 & 0x0f),(buf[i] & 0x0f));
if (isprint(buf[i]))
tempbuf[i%16] = buf[i];
else
tempbuf[i%16] = '.';
}
fprintf(fp," %s",tempbuf);
fprintf(fp,"\n");
}
/*
Internal function only
*/
void trimFileName(ub1 *fname)
{
int i,len;
len = strlen(fname);
for(i=len-1;i>0;i--)
{
if (isspace(*(fname+i))) *(fname+i) = '\0';
if (*(fname+i) == '\r') *(fname+i) = '\0';
if (*(fname+i) == '\t') *(fname+i) = '\0';
}
}
/*
kfbh.endian: 1 ; 0x000: 0x01
kfbh.hard: 130 ; 0x001: 0x82
kfbh.type: 1 ; 0x002: KFBTYP_DISKHEAD
kfbh.datfmt: 1 ; 0x003: 0x01
kfbh.block.blk: 0 ; 0x004: T=0 NUMB=0x0
kfbh.block.obj: 2147483648 ; 0x008: TYPE=0x8 NUMB=0x0
kfbh.check: 2146277315 ; 0x00c: 0x7fed97c3
kfbh.fcn.base: 50 ; 0x010: 0x00000032
kfbh.fcn.wrap: 0 ; 0x014: 0x00000000
kfbh.spare1: 0 ; 0x018: 0x00000000
kfbh.spare2: 0 ; 0x01c: 0x00000000
*/
void getASMBlockHeader(ASMBH *bh, ub1 buf[])
{
memset(bh, 0, sizeof(ASMBH));
bh->edian = buf[0x000];
bh->hard = buf[0x001];
bh->type = buf[0x002];
bh->datfmt = buf[0x003];
if (bh->edian == ASM_BIG_EDIAN)
{
bh->blockblk = BB2UB4(buf[0x004], buf[0x005], buf[0x006], buf[0x007]);
bh->blockobj = BB2UB4(buf[0x008], buf[0x009], buf[0x00a], buf[0x00b]);
bh->check = BB2UB4(buf[0x00c], buf[0x00d], buf[0x00e], buf[0x00f]);
bh->fcnbase = BB2UB4(buf[0x010], buf[0x011], buf[0x012], buf[0x013]);
bh->fcnwrap = BB2UB4(buf[0x014], buf[0x015], buf[0x016], buf[0x017]);
bh->spare1 = BB2UB4(buf[0x018], buf[0x019], buf[0x01a], buf[0x01b]);
bh->spare2 = BB2UB4(buf[0x01c], buf[0x01d], buf[0x01e], buf[0x01f]);
}
else
{
bh->blockblk = LB2UB4(buf[0x004], buf[0x005], buf[0x006], buf[0x007]);
bh->blockobj = LB2UB4(buf[0x008], buf[0x009], buf[0x00a], buf[0x00b]);
bh->check = LB2UB4(buf[0x00c], buf[0x00d], buf[0x00e], buf[0x00f]);
bh->fcnbase = LB2UB4(buf[0x010], buf[0x011], buf[0x012], buf[0x013]);
bh->fcnwrap = LB2UB4(buf[0x014], buf[0x015], buf[0x016], buf[0x017]);
bh->spare1 = LB2UB4(buf[0x018], buf[0x019], buf[0x01a], buf[0x01b]);
bh->spare2 = LB2UB4(buf[0x01c], buf[0x01d], buf[0x01e], buf[0x01f]);
}
}
/*
Get following output with "kfed read xxx aun=0 blkn=0"
kfdhdb.driver.provstr: ORCLDISK ; 0x000: length=8
kfdhdb.compat: 168820736 ; 0x020: 0x0a100000
kfdhdb.dsknum: 0 ; 0x024: 0x0000
kfdhdb.grptyp: 1 ; 0x026: KFDGTP_EXTERNAL
kfdhdb.hdrsts: 3 ; 0x027: KFDHDR_MEMBER
kfdhdb.dskname: TEST_0000 ; 0x028: length=9
kfdhdb.grpname: TEST ; 0x048: length=4
kfdhdb.fgname: TEST_0000 ; 0x068: length=9
kfdhdb.capname: ; 0x088: length=0
kfdhdb.secsize: 512 ; 0x0b8: 0x0200
kfdhdb.blksize: 4096 ; 0x0ba: 0x1000
kfdhdb.ausize: 1048576 ; 0x0bc: 0x00100000
kfdhdb.mfact: 113792 ; 0x0c0: 0x0001bc80
kfdhdb.dsksize: 200 ; 0x0c4: 0x000000c8
kfdhdb.pmcnt: 2 ; 0x0c8: 0x00000002
kfdhdb.fstlocn: 1 ; 0x0cc: 0x00000001
kfdhdb.altlocn: 2 ; 0x0d0: 0x00000002
kfdhdb.f1b1locn: 2 ; 0x0d4: 0x00000002
kfdhdb.dbcompat: 168820736 ; 0x0e0: 0x0a100000
*/
void getASMBlockMetaData(ASMMETA *bh, ub1 buf[])
{
int _hsize=0x020;
ub1 _edian=0;
memset(bh, 0, sizeof(ASMMETA));
_edian = buf[0];
memcpy(bh->provstr, buf + _hsize + 0x000, 8);
if (_edian == ASM_BIG_EDIAN)
{
bh->compat = BB2UB4(buf[_hsize + 0x020], buf[_hsize + 0x021], buf[_hsize + 0x022], buf[_hsize + 0x023]);
bh->dsknum = BB2UB2(buf[_hsize + 0x024], buf[_hsize + 0x025]);
}
else
{
bh->compat = LB2UB4(buf[_hsize + 0x020], buf[_hsize + 0x021], buf[_hsize + 0x022], buf[_hsize + 0x023]);
bh->dsknum = LB2UB2(buf[_hsize + 0x024], buf[_hsize + 0x025]);
}
bh->grptyp = buf[_hsize + 0x026];
bh->hdrsts = buf[_hsize + 0x027];
memcpy(bh->dskname, buf + _hsize + 0x028, 0x020);
memcpy(bh->grpname, buf + _hsize + 0x048, 0x020);
memcpy(bh->fgname , buf + _hsize + 0x068, 0x020);
if (_edian == ASM_BIG_EDIAN)
{
bh->secsize = BB2UB2(buf[_hsize + 0x0b8], buf[_hsize + 0x0b9]);
bh->blksize = BB2UB2(buf[_hsize + 0x0ba], buf[_hsize + 0x0bb]);
bh->ausize = BB2UB4(buf[_hsize + 0x0bc], buf[_hsize + 0x0bd], buf[_hsize + 0x0be], buf[_hsize + 0x0bf]);
bh->mfact = BB2UB4(buf[_hsize + 0x0c0], buf[_hsize + 0x0c1], buf[_hsize + 0x0c2], buf[_hsize + 0x0c3]);
bh->dsksize = BB2UB4(buf[_hsize + 0x0c4], buf[_hsize + 0x0c5], buf[_hsize + 0x0c6], buf[_hsize + 0x0c7]);
bh->pmcnt = BB2UB4(buf[_hsize + 0x0c8], buf[_hsize + 0x0c9], buf[_hsize + 0x0ca], buf[_hsize + 0x0cb]);
bh->fstlocn = BB2UB4(buf[_hsize + 0x0cc], buf[_hsize + 0x0cd], buf[_hsize + 0x0ce], buf[_hsize + 0x0cf]);
bh->altlocn = BB2UB4(buf[_hsize + 0x0d0], buf[_hsize + 0x0d1], buf[_hsize + 0x0d2], buf[_hsize + 0x0d3]);
bh->f1b1locn = BB2UB4(buf[_hsize + 0x0d4], buf[_hsize + 0x0d5], buf[_hsize + 0x0d6], buf[_hsize + 0x0d7]);
bh->dbcompat = BB2UB4(buf[_hsize + 0x0e0], buf[_hsize + 0x0e1], buf[_hsize + 0x0e2], buf[_hsize + 0x0e3]);
}
else
{
bh->secsize = LB2UB2(buf[_hsize + 0x0b8], buf[_hsize + 0x0b9]);
bh->blksize = LB2UB2(buf[_hsize + 0x0ba], buf[_hsize + 0x0bb]);
bh->ausize = LB2UB4(buf[_hsize + 0x0bc], buf[_hsize + 0x0bd], buf[_hsize + 0x0be], buf[_hsize + 0x0bf]);
bh->mfact = LB2UB4(buf[_hsize + 0x0c0], buf[_hsize + 0x0c1], buf[_hsize + 0x0c2], buf[_hsize + 0x0c3]);
bh->dsksize = LB2UB4(buf[_hsize + 0x0c4], buf[_hsize + 0x0c5], buf[_hsize + 0x0c6], buf[_hsize + 0x0c7]);
bh->pmcnt = LB2UB4(buf[_hsize + 0x0c8], buf[_hsize + 0x0c9], buf[_hsize + 0x0ca], buf[_hsize + 0x0cb]);
bh->fstlocn = LB2UB4(buf[_hsize + 0x0cc], buf[_hsize + 0x0cd], buf[_hsize + 0x0ce], buf[_hsize + 0x0cf]);
bh->altlocn = LB2UB4(buf[_hsize + 0x0d0], buf[_hsize + 0x0d1], buf[_hsize + 0x0d2], buf[_hsize + 0x0d3]);
bh->f1b1locn = LB2UB4(buf[_hsize + 0x0d4], buf[_hsize + 0x0d5], buf[_hsize + 0x0d6], buf[_hsize + 0x0d7]);
bh->dbcompat = LB2UB4(buf[_hsize + 0x0e0], buf[_hsize + 0x0e1], buf[_hsize + 0x0e2], buf[_hsize + 0x0e3]);
}
}
/*
kfffdb.hibytes: 0 ; 0x00c: 0x00000000
kfffdb.lobytes: 2097152 ; 0x010: 0x00200000
kfffdb.xtntcnt: 2 ; 0x014: 0x00000002
kfffdb.xtnteof: 2 ; 0x018: 0x00000002
kfffdb.blkSize: 4096 ; 0x01c: 0x00001000
kfffdb.flags: 65 ; 0x020: O=1 S=0 S=0 D=0 C=0 I=0 R=1 A=0
kfffdb.fileType: 15 ; 0x021: 0x0f
kfffdb.dXrs: 17 ; 0x022: SCHE=0x1 NUMB=0x1
kfffdb.iXrs: 17 ; 0x023: SCHE=0x1 NUMB=0x1
kfffdb.dXsiz[0]: 4294967295 ; 0x024: 0xffffffff
kfffdb.dXsiz[1]: 0 ; 0x028: 0x00000000
kfffdb.dXsiz[2]: 0 ; 0x02c: 0x00000000
kfffdb.iXsiz[0]: 4294967295 ; 0x030: 0xffffffff
kfffdb.iXsiz[1]: 0 ; 0x034: 0x00000000
kfffdb.iXsiz[2]: 0 ; 0x038: 0x00000000
kfffdb.xtntblk: 2 ; 0x03c: 0x0002
kfffdb.break: 60 ; 0x03e: 0x003c
kfffdb.priZn: 0 ; 0x040: KFDZN_COLD
kfffdb.secZn: 0 ; 0x041: KFDZN_COLD
kfffdb.alias[0]: 4294967295 ; 0x044: 0xffffffff
kfffdb.alias[1]: 4294967295 ; 0x048: 0xffffffff
kfffdb.strpwdth: 0 ; 0x04c: 0x00
kfffdb.strpsz: 0 ; 0x04d: 0x00
kfffdb.usmsz: 0 ; 0x04e: 0x0000
*/
void getASMFileHeader(ASMFH *bh, ub1 buf[])
{
int _hsize=0x020;
ub1 _edian=0;
memset(bh, 0, sizeof(ASMFH));
_edian = buf[0];
if (_edian == ASM_BIG_EDIAN)
{
bh->hibytes = BB2UB4(buf[_hsize + 0x00c], buf[_hsize + 0x00d], buf[_hsize + 0x00e], buf[_hsize + 0x00f]);
bh->lobytes = BB2UB4(buf[_hsize + 0x010], buf[_hsize + 0x011], buf[_hsize + 0x012], buf[_hsize + 0x013]);
bh->xtntcnt = BB2UB4(buf[_hsize + 0x014], buf[_hsize + 0x015], buf[_hsize + 0x016], buf[_hsize + 0x017]);
bh->xtnteof = BB2UB4(buf[_hsize + 0x018], buf[_hsize + 0x019], buf[_hsize + 0x01a], buf[_hsize + 0x01b]);
bh->blksize = BB2UB4(buf[_hsize + 0x01c], buf[_hsize + 0x01d], buf[_hsize + 0x01e], buf[_hsize + 0x01f]);
}
else
{
bh->hibytes = LB2UB4(buf[_hsize + 0x00c], buf[_hsize + 0x00d], buf[_hsize + 0x00e], buf[_hsize + 0x00f]);
bh->lobytes = LB2UB4(buf[_hsize + 0x010], buf[_hsize + 0x011], buf[_hsize + 0x012], buf[_hsize + 0x013]);
bh->xtntcnt = LB2UB4(buf[_hsize + 0x014], buf[_hsize + 0x015], buf[_hsize + 0x016], buf[_hsize + 0x017]);
bh->xtnteof = LB2UB4(buf[_hsize + 0x018], buf[_hsize + 0x019], buf[_hsize + 0x01a], buf[_hsize + 0x01b]);
bh->blksize = LB2UB4(buf[_hsize + 0x01c], buf[_hsize + 0x01d], buf[_hsize + 0x01e], buf[_hsize + 0x01f]);
}
bh->flags = buf[_hsize + 0x020];
bh->filetype= buf[_hsize + 0x021];
bh->dxrs = buf[_hsize + 0x022];
bh->ixrs = buf[_hsize + 0x023];
if (_edian == ASM_BIG_EDIAN)
{
bh->dxsiz0 = BB2UB4(buf[_hsize + 0x024], buf[_hsize + 0x025], buf[_hsize + 0x026], buf[_hsize + 0x027]);
bh->dxsiz1 = BB2UB4(buf[_hsize + 0x028], buf[_hsize + 0x029], buf[_hsize + 0x02a], buf[_hsize + 0x02b]);
bh->dxsiz2 = BB2UB4(buf[_hsize + 0x02c], buf[_hsize + 0x02d], buf[_hsize + 0x02e], buf[_hsize + 0x02f]);
bh->ixsiz0 = BB2UB4(buf[_hsize + 0x030], buf[_hsize + 0x031], buf[_hsize + 0x032], buf[_hsize + 0x033]);
bh->ixsiz1 = BB2UB4(buf[_hsize + 0x034], buf[_hsize + 0x035], buf[_hsize + 0x036], buf[_hsize + 0x037]);
bh->ixsiz2 = BB2UB4(buf[_hsize + 0x038], buf[_hsize + 0x039], buf[_hsize + 0x03a], buf[_hsize + 0x03b]);
bh->xtntblk = BB2UB2(buf[_hsize + 0x03c], buf[_hsize + 0x03d]);
bh->xbreak = BB2UB2(buf[_hsize + 0x03e], buf[_hsize + 0x03f]);
}
else
{
bh->dxsiz0 = LB2UB4(buf[_hsize + 0x024], buf[_hsize + 0x025], buf[_hsize + 0x026], buf[_hsize + 0x027]);
bh->dxsiz1 = LB2UB4(buf[_hsize + 0x028], buf[_hsize + 0x029], buf[_hsize + 0x02a], buf[_hsize + 0x02b]);
bh->dxsiz2 = LB2UB4(buf[_hsize + 0x02c], buf[_hsize + 0x02d], buf[_hsize + 0x02e], buf[_hsize + 0x02f]);
bh->ixsiz0 = LB2UB4(buf[_hsize + 0x030], buf[_hsize + 0x031], buf[_hsize + 0x032], buf[_hsize + 0x033]);
bh->ixsiz1 = LB2UB4(buf[_hsize + 0x034], buf[_hsize + 0x035], buf[_hsize + 0x036], buf[_hsize + 0x037]);
bh->ixsiz2 = LB2UB4(buf[_hsize + 0x038], buf[_hsize + 0x039], buf[_hsize + 0x03a], buf[_hsize + 0x03b]);
bh->xtntblk = LB2UB2(buf[_hsize + 0x03c], buf[_hsize + 0x03d]);
bh->xbreak = LB2UB2(buf[_hsize + 0x03e], buf[_hsize + 0x03f]);
}
bh->prizn = buf[_hsize + 0x040];
bh->seczn = buf[_hsize + 0x041];
if (_edian == ASM_BIG_EDIAN)
{
bh->alias0 = BB2UB4(buf[_hsize + 0x044], buf[_hsize + 0x045], buf[_hsize + 0x046], buf[_hsize + 0x047]);
bh->alias1 = BB2UB4(buf[_hsize + 0x048], buf[_hsize + 0x049], buf[_hsize + 0x04a], buf[_hsize + 0x04b]);
}
else
{
bh->alias0 = LB2UB4(buf[_hsize + 0x044], buf[_hsize + 0x045], buf[_hsize + 0x046], buf[_hsize + 0x047]);
bh->alias1 = LB2UB4(buf[_hsize + 0x048], buf[_hsize + 0x049], buf[_hsize + 0x04a], buf[_hsize + 0x04b]);
}
bh->strpwdth = buf[_hsize + 0x04c];
bh->strpsz = buf[_hsize + 0x04d];
if (_edian == ASM_BIG_EDIAN)
{
bh->usmsz = BB2UB2(buf[_hsize + 0x04e], buf[_hsize + 0x04f]);
}
else
{
bh->usmsz = LB2UB2(buf[_hsize + 0x04e], buf[_hsize + 0x04f]);
}
}
/*
only valid for block type = ASM_BLOCK_INDIRECT
kffixb.dxsn: 60 ; 0x000: 0x0000003c
kffixb.xtntblk: 69 ; 0x004: 0x0045
kffixb.dXrs: 17 ; 0x006: SCHE=0x1 NUMB=0x1
kffixb.ub1spare: 0 ; 0x007: 0x00
kffixb.ub4spare: 0 ; 0x008: 0x00000000
*/
void getASMExtentHeader(ASMEXTH *bh, ub1 buf[])
{
int _hsize=0x020;
ub1 _edian=0;
memset(bh, 0, sizeof(ASMEXTH));
_edian = buf[0];
if (_edian == ASM_BIG_EDIAN)
{
bh->dxsn = BB2UB4(buf[_hsize + 0x000], buf[_hsize + 0x001], buf[_hsize + 0x002], buf[_hsize + 0x003]);
bh->xtntblk = BB2UB2(buf[_hsize + 0x004], buf[_hsize + 0x005]);
}
else
{
bh->dxsn = LB2UB4(buf[_hsize + 0x000], buf[_hsize + 0x001], buf[_hsize + 0x002], buf[_hsize + 0x003]);
bh->xtntblk = LB2UB2(buf[_hsize + 0x004], buf[_hsize + 0x005]);
}
bh->dxrs = buf[_hsize + 0x006];
}
/*
if block type is ASM_BLOCK_FILEDIR, offset = 0x020(BH) + 0x4a0;
if block type is ASM_BLOCK_INDIRECT, offset = 0x020(BH) + 0x00c;
kffixe[0].xptr.au: 58 ; 0x00c: 0x0000003a
kffixe[0].xptr.disk: 0 ; 0x010: 0x0000
kffixe[0].xptr.flags: 0 ; 0x012: L=0 E=0 D=0 S=0
kffixe[0].xptr.chk: 16 ; 0x013: 0x10
*/
void getASMFileExtent(ASMEXTENT *bh, ub1 buf[], ub2 buflen, ub2 xid)
{
ASMBH bufh;
ub2 _hsize = 0;
memset(bh,0,sizeof(ASMEXTENT));
getASMBlockHeader(&bufh, buf);
if (bufh.type == ASM_BLOCK_FILEDIR)
{
_hsize = 0x020 + 0x4a0;
}
if (bufh.type == ASM_BLOCK_INDIRECT)
{
_hsize = 0x020 + 0x00c;
}
if (bufh.type != ASM_BLOCK_FILEDIR && bufh.type != ASM_BLOCK_INDIRECT) return;
if ((_hsize + (xid + 1) * sizeof(ASMEXTENT)) > buflen) return;
_hsize = _hsize + xid * sizeof(ASMEXTENT);
if (bufh.edian == ASM_BIG_EDIAN)
{
bh->au = BB2UB4(buf[_hsize + 0x00], buf[_hsize + 0x01], buf[_hsize + 0x02], buf[_hsize + 0x03]);
bh->disk = BB2UB2(buf[_hsize + 0x04], buf[_hsize + 0x05]);
}
else
{
bh->au = LB2UB4(buf[_hsize + 0x00], buf[_hsize + 0x01], buf[_hsize + 0x02], buf[_hsize + 0x03]);
bh->disk = LB2UB2(buf[_hsize + 0x04], buf[_hsize + 0x05]);
}
bh->flags = buf[_hsize + 0x06];
bh->chk = buf[_hsize + 0x07];
}
/*
kffdnd.bnode.incarn: 1 ; 0x000: A=1 NUMM=0x0
kffdnd.bnode.frlist.number: 4294967295 ; 0x004: 0xffffffff
kffdnd.bnode.frlist.incarn: 0 ; 0x008: A=0 NUMM=0x0
kffdnd.overfl.number: 4294967295 ; 0x00c: 0xffffffff
kffdnd.overfl.incarn: 0 ; 0x010: A=0 NUMM=0x0
kffdnd.parent.number: 0 ; 0x014: 0x00000000
kffdnd.parent.incarn: 1 ; 0x018: A=1 NUMM=0x0
kffdnd.fstblk.number: 2 ; 0x01c: 0x00000002
kffdnd.fstblk.incarn: 1 ; 0x020: A=1 NUMM=0x0
*/
void getASMAliasHeader(ASMAH *bh, ub1 buf[])
{
int _hsize=0x020;
ub1 _edian=0;
memset(bh, 0, sizeof(ASMAH));
_edian = buf[0];
if (_edian == ASM_BIG_EDIAN)
{
bh->bnode_incarn = BB2UB4(buf[_hsize + 0x00], buf[_hsize + 0x01], buf[_hsize + 0x02], buf[_hsize + 0x03]);
bh->frlist_number = BB2UB4(buf[_hsize + 0x04], buf[_hsize + 0x05], buf[_hsize + 0x06], buf[_hsize + 0x07]);
bh->frlist_incarn = BB2UB4(buf[_hsize + 0x08], buf[_hsize + 0x09], buf[_hsize + 0x0a], buf[_hsize + 0x0b]);
bh->overfl_number = BB2UB4(buf[_hsize + 0x0c], buf[_hsize + 0x0d], buf[_hsize + 0x0e], buf[_hsize + 0x0f]);
bh->overfl_incarn = BB2UB4(buf[_hsize + 0x10], buf[_hsize + 0x11], buf[_hsize + 0x12], buf[_hsize + 0x13]);
bh->parent_number = BB2UB4(buf[_hsize + 0x14], buf[_hsize + 0x15], buf[_hsize + 0x16], buf[_hsize + 0x17]);
bh->parent_incarn = BB2UB4(buf[_hsize + 0x18], buf[_hsize + 0x19], buf[_hsize + 0x1a], buf[_hsize + 0x1b]);
bh->fstblk_number = BB2UB4(buf[_hsize + 0x1c], buf[_hsize + 0x1d], buf[_hsize + 0x1e], buf[_hsize + 0x1f]);
bh->fstblk_incarn = BB2UB4(buf[_hsize + 0x20], buf[_hsize + 0x21], buf[_hsize + 0x22], buf[_hsize + 0x23]);
}
else
{
bh->bnode_incarn = LB2UB4(buf[_hsize + 0x00], buf[_hsize + 0x01], buf[_hsize + 0x02], buf[_hsize + 0x03]);
bh->frlist_number = LB2UB4(buf[_hsize + 0x04], buf[_hsize + 0x05], buf[_hsize + 0x06], buf[_hsize + 0x07]);
bh->frlist_incarn = LB2UB4(buf[_hsize + 0x08], buf[_hsize + 0x09], buf[_hsize + 0x0a], buf[_hsize + 0x0b]);
bh->overfl_number = LB2UB4(buf[_hsize + 0x0c], buf[_hsize + 0x0d], buf[_hsize + 0x0e], buf[_hsize + 0x0f]);
bh->overfl_incarn = LB2UB4(buf[_hsize + 0x10], buf[_hsize + 0x11], buf[_hsize + 0x12], buf[_hsize + 0x13]);
bh->parent_number = LB2UB4(buf[_hsize + 0x14], buf[_hsize + 0x15], buf[_hsize + 0x16], buf[_hsize + 0x17]);
bh->parent_incarn = LB2UB4(buf[_hsize + 0x18], buf[_hsize + 0x19], buf[_hsize + 0x1a], buf[_hsize + 0x1b]);
bh->fstblk_number = LB2UB4(buf[_hsize + 0x1c], buf[_hsize + 0x1d], buf[_hsize + 0x1e], buf[_hsize + 0x1f]);
bh->fstblk_incarn = LB2UB4(buf[_hsize + 0x20], buf[_hsize + 0x21], buf[_hsize + 0x22], buf[_hsize + 0x23]);
}
}
/*
kfade[0].entry.incarn: 1 ; 0x024: A=1 NUMM=0x0
kfade[0].entry.hash: 710518681 ; 0x028: 0x2a59a799
kfade[0].entry.refer.number: 3 ; 0x02c: 0x00000003
kfade[0].entry.refer.incarn: 1 ; 0x030: A=1 NUMM=0x0
kfade[0].name: DATAFILE ; 0x034: length=8
kfade[0].fnum: 4294967295 ; 0x064: 0xffffffff
kfade[0].finc: 4294967295 ; 0x068: 0xffffffff
kfade[0].flags: 4 ; 0x06c: U=0 S=0 S=1 U=0 F=0
kfade[0].ub1spare: 0 ; 0x06d: 0x00
kfade[0].ub2spare: 0 ; 0x06e: 0x0000
*/
void getASMAliasRecord(ASMALIAS *bh, ub1 buf[], ub2 buflen, ub2 xid)
{
int _hsize=0x020;
ub1 _edian=0;
ASMBH bufh;
getASMBlockHeader(&bufh, buf);
_hsize = _hsize + 0x24;
memset(bh, 0, sizeof(ASMALIAS));
_edian = buf[0];
if (bufh.type != ASM_BLOCK_ALIASDIR) return;
if ((_hsize + (xid + 1) * sizeof(ASMALIAS)) > buflen) return;
_hsize = _hsize + xid * sizeof(ASMALIAS);
memcpy(bh->name, buf + _hsize + 0x10, 0x30);
bh->flags = buf[_hsize + 0x48];
bh->ub1spare = buf[_hsize + 0x49];
if (bufh.edian == ASM_BIG_EDIAN)
{
bh->entry_incarn = BB2UB4(buf[_hsize + 0x00], buf[_hsize + 0x01], buf[_hsize + 0x02], buf[_hsize + 0x03]);
bh->entry_hash = BB2UB4(buf[_hsize + 0x04], buf[_hsize + 0x05], buf[_hsize + 0x06], buf[_hsize + 0x07]);
bh->refer_number = BB2UB4(buf[_hsize + 0x08], buf[_hsize + 0x09], buf[_hsize + 0x0a], buf[_hsize + 0x0b]);
bh->refer_incarn = BB2UB4(buf[_hsize + 0x0c], buf[_hsize + 0x0d], buf[_hsize + 0x0e], buf[_hsize + 0x0f]);
bh->fnum = BB2UB4(buf[_hsize + 0x40], buf[_hsize + 0x41], buf[_hsize + 0x42], buf[_hsize + 0x43]);
bh->finc = BB2UB4(buf[_hsize + 0x44], buf[_hsize + 0x45], buf[_hsize + 0x46], buf[_hsize + 0x47]);
bh->ub2spare = BB2UB2(buf[_hsize + 0x4a], buf[_hsize + 0x4b]);
}
else
{
bh->entry_incarn = LB2UB4(buf[_hsize + 0x00], buf[_hsize + 0x01], buf[_hsize + 0x02], buf[_hsize + 0x03]);
bh->entry_hash = LB2UB4(buf[_hsize + 0x04], buf[_hsize + 0x05], buf[_hsize + 0x06], buf[_hsize + 0x07]);
bh->refer_number = LB2UB4(buf[_hsize + 0x08], buf[_hsize + 0x09], buf[_hsize + 0x0a], buf[_hsize + 0x0b]);
bh->refer_incarn = LB2UB4(buf[_hsize + 0x0c], buf[_hsize + 0x0d], buf[_hsize + 0x0e], buf[_hsize + 0x0f]);
bh->fnum = LB2UB4(buf[_hsize + 0x40], buf[_hsize + 0x41], buf[_hsize + 0x42], buf[_hsize + 0x43]);
bh->finc = LB2UB4(buf[_hsize + 0x44], buf[_hsize + 0x45], buf[_hsize + 0x46], buf[_hsize + 0x47]);
bh->ub2spare = LB2UB2(buf[_hsize + 0x4a], buf[_hsize + 0x4b]);
}
}
void initASMDisk(ASMDISK *disk)
{
disk->dsknum=0xffff;
disk->dsksize=0xffffffff;
disk->ausize = 0;
disk->blksize= 0;
memset(disk->dskname,0,32);
memset(disk->grpname,0,32);
disk->fp=NULL;
}
void initASMDiskGroup(ASMDISKGROUP *dg)
{
int i=0;
dg->compat = 0;
dg->dskcnt = 0;
dg->ausize = 1048576;
dg->blksize = 4096;
dg->oblksize = 8192;
dg->f1b1disk = 0xffff;
dg->f1b1au = 0xffffffff;
dg->cache.blk_disk = 0xffff;
dg->cache.blk_aun = 0xffffff;
dg->cache.blk_block= 0xffff;
dg->cache.blkbuf=NULL;
dg->cache.au_disk = 0xffff;
dg->cache.au_aun = 0xffffff;
dg->cache.aubuf =NULL;
dg->cache.ex_disk = 0xffff;
dg->cache.ex_aun = 0xffffff;
dg->cache.exbuf =NULL;
for(i=0;i<65536;i++)
dg->index[i] = 0xffff;
for(i=0;i<ASM_MAX_DISKS;i++)
initASMDisk(&(dg->disks[i]));
dg->afile.fileid = 0xffffffff;
dg->afile.disk = 0xffff;
dg->afile.aun = 0xffffffff;
dg->afile.block = 0;
dg->alias.fileid = 0xffffffff;
dg->alias.disk = 0xffff;
dg->alias.aun = 0xffffffff;
dg->alias.block = 0;
dg->adisk.fileid = 0xffffffff;
dg->adisk.disk = 0xffff;
dg->adisk.aun = 0xffffffff;
dg->adisk.block = 0;
dg->policy.level1au = 0xffffffff;
dg->policy.level1sz = 0x0001;
dg->policy.level2au = 0xffffffff;
dg->policy.level2sz = 0x0001;
dg->policy.level3au = 0xffffffff;
dg->policy.level3sz = 0x0001;
dg->policy.level4au = 0xffffffff;
dg->policy.level4sz = 0x0001;
}
ub4 readFromDisk(ASMDISK *dsk, ub8 offset, ub1 buf[], ub4 buflen)
{
fpos_t fpos;
if (dsk->fp != NULL)
{
#if defined(SIMPLE_FPOS_T)
fpos = offset;
#else
fpos.__pos = offset;
#endif
if (fsetpos(dsk->fp,&fpos) == 0)
{
if (fread(buf,buflen,1,dsk->fp) == 1) return buflen;
}
}
return 0;
}
void closeDiskGroup(ASMDISKGROUP *dg)
{
int i=0;
dg->compat = 0;
dg->dskcnt = 0;
dg->f1b1disk = 0xffff;
dg->f1b1au = 0xffffffff;
for(i=0;i<65536;i++)
dg->index[i] = 0xffff;
for(i=0;i<dg->dskcnt;i++)
{
if (dg->disks[i].fp != NULL)
{
fclose(dg->disks[i].fp);
dg->disks[i].fp = NULL;
}
}
for(i=0;i<ASM_MAX_DISKS;i++)
initASMDisk(&(dg->disks[i]));
if (dg->cache.aubuf != NULL) free(dg->cache.aubuf);
if (dg->cache.blkbuf != NULL) free(dg->cache.blkbuf);
if (dg->cache.exbuf != NULL) free(dg->cache.exbuf);
dg->cache.aubuf = NULL;
dg->cache.blkbuf = NULL;
dg->cache.exbuf = NULL;
dg->afile.fileid = 0xffffffff;
dg->afile.disk = 0xffff;
dg->afile.aun = 0xffffffff;
dg->afile.block = 0;
dg->alias.fileid = 0xffffffff;
dg->alias.disk = 0xffff;
dg->alias.aun = 0xffffffff;
dg->alias.block = 0;
dg->adisk.fileid = 0xffffffff;
dg->adisk.disk = 0xffff;
dg->adisk.aun = 0xffffffff;
dg->adisk.block = 0;
dg->policy.level1au = 0xffffffff;
dg->policy.level1sz = 0x0001;
dg->policy.level2au = 0xffffffff;
dg->policy.level2sz = 0x0001;
dg->policy.level3au = 0xffffffff;
dg->policy.level3sz = 0x0001;
dg->policy.level4au = 0xffffffff;
dg->policy.level4sz = 0x0001;
}
void openDiskGroup(FILE *flog, ASMDISKGROUP *dg, ub1 *fname)
{
ub1 dskvalid = 0x00;
FILE *fp=NULL;
char buf[256];
ASMBH bhead;
ASMMETA bmeta;
closeDiskGroup(dg);
setDiskGroupCache(dg);
if ((fp = fopen(fname,"r+")) == NULL)
{
if (flog != NULL) fprintf(flog, "Cannot open disk list file (%s)!\n", fname);
return;
}
while (dg->dskcnt < ASM_MAX_DISKS && !feof(fp))
{
memset(buf,0,256);
fgets(buf,255,fp);
if (buf[0] && buf[0] != '#')
{
trimFileName(buf);
if ((dg->disks[dg->dskcnt].fp = fopen(buf, "rb")) != NULL)
{
dskvalid = 0x00;
setbuf(dg->disks[dg->dskcnt].fp, NULL);
if (readFromDisk(&(dg->disks[dg->dskcnt]),0,dg->cache.blkbuf,dg->blksize) == dg->blksize)
{
getASMBlockHeader(&bhead, dg->cache.blkbuf);
if (bhead.type == ASM_BLOCK_DISKHEAD)
{
getASMBlockMetaData(&bmeta, dg->cache.blkbuf);
dg->disks[dg->dskcnt].ausize = bmeta.ausize;
dg->disks[dg->dskcnt].blksize = bmeta.blksize;
dg->disks[dg->dskcnt].dsknum = bmeta.dsknum;
dg->disks[dg->dskcnt].dsksize = bmeta.dsksize;
memcpy(dg->disks[dg->dskcnt].dskname, bmeta.dskname, 32);
memcpy(dg->disks[dg->dskcnt].grpname, bmeta.grpname, 32);
memcpy(dg->disks[dg->dskcnt].path, buf, 256);
dg->index[bmeta.dsknum] = dg->dskcnt;
dg->compat = bmeta.compat;
if (bmeta.f1b1locn)
{
dg->f1b1disk = bmeta.dsknum;
dg->f1b1au = bmeta.f1b1locn;
}
dg->dskcnt ++;
dskvalid = 0x01;
}
}
if (!dskvalid)
{
fclose(dg->disks[dg->dskcnt].fp);
dg->disks[dg->dskcnt].fp = NULL;
if (flog != NULL) fprintf(flog, "Invalid Disk : %s\n", buf);
}
}
}
}
if (dg->dskcnt && dg->f1b1disk < 0xffff && dg->f1b1au < 0xffffffff)
{
getASMSystemFileEntry(dg);
}
}
void openDiskGroupDisk(FILE *flog, ASMDISKGROUP *dg, ub2 disk, ub1 *fname)
{
ASMBH bhead;
ASMMETA bmeta;
if (dg->dskcnt < ASM_MAX_DISKS && (dg->disks[dg->dskcnt].fp = fopen(fname, "rb")) != NULL)
{
setbuf(dg->disks[dg->dskcnt].fp, NULL);
if (readFromDisk(&(dg->disks[dg->dskcnt]),0,dg->cache.blkbuf,dg->blksize) == dg->blksize)
{
getASMBlockHeader(&bhead, dg->cache.blkbuf);
if (bhead.type == ASM_BLOCK_DISKHEAD)
{
getASMBlockMetaData(&bmeta, dg->cache.blkbuf);
dg->disks[dg->dskcnt].ausize = bmeta.ausize;
dg->disks[dg->dskcnt].blksize = bmeta.blksize;
dg->disks[dg->dskcnt].dsknum = bmeta.dsknum;
dg->disks[dg->dskcnt].dsksize = bmeta.dsksize;
memcpy(dg->disks[dg->dskcnt].dskname, bmeta.dskname, 32);
memcpy(dg->disks[dg->dskcnt].grpname, bmeta.grpname, 32);
memcpy(dg->disks[dg->dskcnt].path, fname, MIN(255,strlen(fname)));
dg->compat = bmeta.compat;
if (bmeta.f1b1locn < 0xffffffff)
{
dg->f1b1disk = bmeta.dsknum;
dg->f1b1au = bmeta.f1b1locn;
}
}
}
dg->disks[dg->dskcnt].dsknum = disk;
dg->index[disk] = dg->dskcnt;
dg->dskcnt ++;
}
if (dg->dskcnt && dg->f1b1disk < 0xffff && dg->f1b1au < 0xffffffff)
{
getASMSystemFileEntry(dg);
}
}
void printDiskGroup(FILE *flog, ASMDISKGROUP *dg)
{
int i=0;
if (flog != NULL && dg->dskcnt)
{
fprintf(flog, "Total Disks = %d, ausize=%d, blksize=%d\n", dg->dskcnt, dg->ausize, dg->blksize);
fprintf(flog, "\n");
fprintf(flog, " disk size block disk name disk group disk path \n");
fprintf(flog, "===== ======== ===== ================ ============ ========================\n");
for(i=0;i<dg->dskcnt;i++)
{
fprintf(flog, "%5d %8d %5d %-*s %-*s %s\n",
dg->disks[i].dsknum, dg->disks[i].dsksize, dg->disks[i].blksize,
16, dg->disks[i].dskname, 12, dg->disks[i].grpname, dg->disks[i].path );
}
fprintf(flog, "\n");
fprintf(flog, "f1b1disk = %d, f1b1au = %d, score=%d, compat=0x%08x\n",
dg->f1b1disk, dg->f1b1au, scoreASMFileEntryAU(dg, dg->f1b1disk, dg->f1b1au), dg->compat);
fprintf(flog, "file=(%d,%d,%d,%d), disk=(%d,%d,%d,%d), alias=(%d,%d,%d,%d)\n",
dg->afile.fileid,dg->afile.disk, dg->afile.aun, dg->afile.block,
dg->adisk.fileid,dg->adisk.disk, dg->adisk.aun, dg->adisk.block,
dg->alias.fileid,dg->alias.disk, dg->alias.aun, dg->alias.block);
}
}
ub4 readDiskGroup(ASMDISKGROUP *dg, ub2 disk, ub4 au, ub2 blkn, ub1 buf[], ub4 buflen)
{
ub2 pos=0;
ub8 offset = 1;
pos = dg->index[disk];
if (pos >= ASM_MAX_DISKS) return 0;
if (dg->disks[pos].dsknum != disk) return 0;
offset = offset * au * dg->disks[pos].ausize;
offset = offset + blkn * dg->disks[pos].blksize;
return readFromDisk(&(dg->disks[pos]), offset, buf, buflen);
}
ub4 readDiskGroupAU(ASMDISKGROUP *dg, ub2 disk, ub4 au)
{
if (dg->cache.au_disk == disk && dg->cache.au_aun == au) return dg->ausize;
if (readDiskGroup(dg, disk, au, 0, dg->cache.aubuf, dg->ausize) == dg->ausize)
{
dg->cache.au_disk = disk;
dg->cache.au_aun = au;
return dg->ausize;
}
return 0;
}
ub4 readDiskGroupEX(ASMDISKGROUP *dg, ub2 disk, ub4 au)
{
if (dg->cache.ex_disk == disk && dg->cache.ex_aun == au) return dg->ausize;
if (readDiskGroup(dg, disk, au, 0, dg->cache.exbuf, dg->ausize) == dg->ausize)
{
dg->cache.ex_disk = disk;
dg->cache.ex_aun = au;
return dg->ausize;
}
return 0;
}
ub2 readDiskGroupBlock(ASMDISKGROUP *dg, ub2 disk, ub4 au, ub2 blkn)
{
if (dg->cache.blk_disk == disk && dg->cache.blk_aun == au && dg->cache.blk_block == blkn) return dg->blksize;
if (dg->cache.au_disk == disk && dg->cache.au_aun == au && (blkn+1) * dg->blksize < dg->ausize)
{
memcpy(dg->cache.blkbuf, dg->cache.aubuf + blkn * dg->blksize, dg->blksize);
dg->cache.blk_disk = disk;
dg->cache.blk_aun = au;
dg->cache.blk_block= blkn;
return dg->blksize;
}
if (dg->cache.ex_disk == disk && dg->cache.ex_aun == au && (blkn+1) * dg->blksize < dg->ausize)
{
memcpy(dg->cache.blkbuf, dg->cache.exbuf + blkn * dg->blksize, dg->blksize);
dg->cache.blk_disk = disk;
dg->cache.blk_aun = au;
dg->cache.blk_block= blkn;
return dg->blksize;
}
if (readDiskGroup(dg, disk, au, blkn, dg->cache.blkbuf, dg->blksize) == dg->blksize)
{
dg->cache.blk_disk = disk;
dg->cache.blk_aun = au;
dg->cache.blk_block= blkn;
return dg->blksize;
}
return 0;
}
void setDiskGroupCache(ASMDISKGROUP *dg)
{
if (dg->ausize < 128 * 1028576)
{
if (dg->cache.aubuf != NULL) free(dg->cache.aubuf);
dg->cache.aubuf = (ub1 *)malloc(dg->ausize);
if (dg->cache.exbuf != NULL) free(dg->cache.exbuf);
dg->cache.exbuf = (ub1 *)malloc(dg->ausize);
}
if (dg->blksize < 0xffff)
{
if (dg->cache.blkbuf != NULL) free(dg->cache.blkbuf);
dg->cache.blkbuf = (ub1 *)malloc(dg->blksize);
}
dg->cache.blk_disk = 0xffff;
dg->cache.blk_aun = 0xffffff;
dg->cache.blk_block= 0xffff;
dg->cache.au_disk = 0xffff;
dg->cache.au_aun = 0xffffff;
dg->cache.ex_disk = 0xffff;
dg->cache.ex_aun = 0xffffff;
}
/*
For file entry AU, fist block type should be ASM_BLOCK_LISTHEAD
Other blocks should be ASM_BLOCK_FILEDIR
*/
ub2 scoreASMFileEntryAU(ASMDISKGROUP *dg, ub2 disk, ub4 au)
{
int i=0;
ub2 score=0;
ASMBH bh;
if (readDiskGroupAU(dg, disk, au) == dg->ausize)
{
for(i=0;i * dg->blksize < dg->ausize; i++)
{
getASMBlockHeader(&bh, dg->cache.aubuf + i * dg->blksize);
if (i>0)
{
if (bh.type == ASM_BLOCK_FILEDIR && bh.blockblk == i) score ++;
}
else
{
if (bh.type == ASM_BLOCK_LISTHEAD && bh.blockblk == 0) score ++;
}
}
}
return score;
}
/*
save the file entry information for file 1 and file 6
#define ASM_FILE_FILEDIR 0x01
#define ASM_FILE_DISKDIR 0x02
#define ASM_FILE_ALIAS 0x06
*/
void getASMSystemFileEntry(ASMDISKGROUP *dg)
{
int i=0;
ASMBH bh;
ASMFH fh;
if (readDiskGroupAU(dg, dg->f1b1disk, dg->f1b1au) == dg->ausize)
{
for(i=0;i * dg->blksize < dg->ausize; i++)
{
getASMBlockHeader(&bh, dg->cache.aubuf + i * dg->blksize);
if (bh.type == ASM_BLOCK_FILEDIR)
{
getASMFileHeader(&fh, dg->cache.aubuf + i * dg->blksize);
if (bh.blockblk == ASM_FILE_FILEDIR)
{
dg->afile.fileid = ASM_FILE_FILEDIR;
dg->afile.disk = dg->f1b1disk;
dg->afile.aun = dg->f1b1au;
dg->afile.block = i;
}
else if (bh.blockblk == ASM_FILE_DISKDIR)
{
dg->adisk.fileid = ASM_FILE_DISKDIR;
dg->adisk.disk = dg->f1b1disk;
dg->adisk.aun = dg->f1b1au;
dg->adisk.block = i;
}
else if (bh.blockblk == ASM_FILE_ALIAS)
{
dg->alias.fileid = ASM_FILE_ALIAS;
dg->alias.disk = dg->f1b1disk;
dg->alias.aun = dg->f1b1au;
dg->alias.block = i;
}
}
}
}
}
void listASMFileEntryAU(FILE *flog, ASMDISKGROUP *dg, ub2 disk, ub4 au)
{
int blkid=0;
ASMBH bh;
ASMFH fh;
ub8 allbytes=0;
if (readDiskGroupAU(dg, disk, au) == dg->ausize)
{
for(blkid=0;blkid * dg->blksize < dg->ausize; blkid++)
{
getASMBlockHeader(&bh, dg->cache.aubuf + blkid * dg->blksize);
if (bh.type == ASM_BLOCK_FILEDIR && bh.blockobj == 1)
{
getASMFileHeader(&fh, dg->cache.aubuf + blkid * dg->blksize);
if (fh.lobytes)
{
allbytes = fh.hibytes;
allbytes = allbytes << 32;
allbytes = allbytes + fh.lobytes;
fprintf(flog,"fileid=%d, disk=%d, au=%d, block=%d, size=%lld, aus=%d, flags=%d, type=%d\n",
bh.blockblk, disk, au, blkid, allbytes, fh.xtntcnt, fh.flags, fh.filetype);
}
}
}
}
}
/*
Variable AU related
1 - 20000 = 1 AU
20001 - 40000 = 8 AU
40001 - = 64 AU
*/
ub4 getExtentAUCount(ASMEXTENTPOLICY *policy, ub4 extentid)
{
if (extentid <= policy->level1au)
return policy->level1sz;
else if (extentid <= policy->level2au)
return policy->level2sz;
else if (extentid <= policy->level3au)
return policy->level3sz;
else if (extentid <= policy->level4au)
return policy->level4sz;
else
return 1;
}
void setExtentAUCount(ASMEXTENTPOLICY *policy, ub1 level, ub4 auend, ub4 aucnt)
{
if (aucnt == 0) return;
if (level == 0x01)
{
policy->level1au = auend;
policy->level1sz = aucnt;
}
else if (level == 0x02)
{
if (auend > policy->level1au)
{
policy->level2au = auend;
policy->level2sz = aucnt;
}
}
else if (level == 0x03)
{
if (auend > policy->level2au && auend > policy->level1au)
{
policy->level3au = auend;
policy->level3sz = aucnt;
}
}
else if (level == 0x04)
{
if (auend > policy->level3au && auend > policy->level2au && auend > policy->level1au)
{
policy->level4au = auend;
policy->level4sz = aucnt;
}
}
}
void listASMFileExtent(FILE *flog, ASMDISKGROUP *dg, ASMFILE *asmf)
{
int entryi,extenti,blkid;
ub4 allxtntcnt=0, dbxtntcnt = 0;
ub8 allbytes=0;
ASMBH entrybh,extentbh;
ASMFH entryfh;
ASMEXTH extenth;
ASMEXTENT entryfet,extentfet;
ub1 *entrybuf = NULL;
entrybuf = (ub1 *)malloc(dg->blksize);
if (entrybuf != NULL && readDiskGroupBlock(dg, asmf->disk, asmf->aun, asmf->block) == dg->blksize)