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cckddiag.c
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cckddiag.c
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/* CCKDDIAG.C (c) Copyright Roger Bowler, 1999-2012 */
/* Hercules CCKD diagnostic tool */
/* */
/* Released under "The Q Public License Version 1" */
/* (http://www.hercules-390.org/herclic.html) as modifications to */
/* Hercules. */
/* 2003-02-07 James M. Morrison initial implementation */
/* portions borrowed from cckdcdsk & other CCKD code */
/*-------------------------------------------------------------------*/
/* Diagnostic tool to display various CCKD data */
/*-------------------------------------------------------------------*/
#include "hstdinc.h"
/* TODO: add FBA support or write cfbadiag */
#include "hercules.h"
#include "dasdblks.h" /* data_dump */
#define UTILITY_NAME "cckddiag"
typedef struct _CKD_RECSTAT { /* CKD DASD record stats */
int cc; /* CC cylinder # (relative zero) */
int hh; /* HH head # (relative zero) */
int r; /* Record # (relative zero) */
int kl; /* key length */
int dl; /* data length */
} CKD_RECSTAT;
/*-------------------------------------------------------------------*/
/* Global data areas */
/*-------------------------------------------------------------------*/
CCKD_L1ENT *l1 = NULL; /* L1TAB */
CCKD_L2ENT *l2 = NULL; /* L2TAB */
void *tbuf = NULL; /* track header & data */
void *bulk = NULL; /* bulk data buffer */
int fd = 0; /* File descriptor */
static BYTE eighthexFF[] = {0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff};
#ifdef DEBUG
int debug = 1; // enable debug code
#else
int debug = 0; // disable debug code
#endif
int pausesnap = 0; // 1 = pause after snap (getc)
/*-------------------------------------------------------------------*/
/* print syntax */
/*-------------------------------------------------------------------*/
int syntax(char *pgm)
{
// "Usage: %s ...
WRMSG( HHC02600, "I", pgm );
return -1;
}
/*-------------------------------------------------------------------*/
/* snap - display msg, dump data */
/*-------------------------------------------------------------------*/
/* Message preceded with newline */
void snap(int comp, void *data, int len) {
printf("\n");
if (comp)
// "SHOWTRK Compressed track header and data"
WRMSG( HHC90403, "I" );
else
// "SHOWTRK Decompressed track header and data"
WRMSG( HHC90404, "I" );
data_dump(data, len); printf("\n");
if (pausesnap) {
// "Press enter to continue"
WRMSG( HHC02601, "A" );
(void)getc(stdin);
}
}
/*-------------------------------------------------------------------*/
/* clean - cleanup before exit */
/*-------------------------------------------------------------------*/
void clean(void) {
close(fd);
free(l1); /* L1TAB buffer */
free(l2); /* L2TAB buffer */
free(tbuf); /* track and header buffer */
free(bulk); /* offset data buffer */
}
/*-------------------------------------------------------------------*/
/* makbuf - allocate buffer, handle errors (exit if any) */
/*-------------------------------------------------------------------*/
void *makbuf(int len, char *label) {
void *p;
p = malloc(len);
if (p == NULL) {
// "From %s: Storage allocation of size %d using %s failed"
FWRMSG( stderr, HHC02602, "E", label, len, "malloc()" );
clean();
exit(4);
}
if (debug)
// "MAKBUF() malloc %s buffer of %d bytes at %p"
WRMSG( HHC90400, "D", label, len, p);
return p;
}
/*-------------------------------------------------------------------*/
/* readpos - common lseek and read invocation with error handling */
/*-------------------------------------------------------------------*/
/* This code exits on error rather than return to caller. */
int readpos(
int fd, /* opened CCKD image file */
void *buf, /* buffer of size len */
off_t offset, /* offset into CCKD image to read */
unsigned int len /* length of data to read */
) {
if (debug)
// "READPOS seeking %d (0x%8.8X)"
WRMSG( HHC90401, "D", (int) offset, (unsigned int) offset );
if (lseek(fd, offset, SEEK_SET) < 0) {
// "In %s: lseek() to pos 0x%08x error: %s"
FWRMSG( stderr, HHC02603, "E", "READPOS", (unsigned int) offset, strerror( errno ));
clean();
exit (1);
}
if (debug)
// "READPOS reading buf addr %p length %d (0x%X)"
WRMSG( HHC90402, "D", buf, len, len);
if (read(fd, buf, len) < (ssize_t)len) {
// "In %s: read() error: %s"
FWRMSG( stderr, HHC02604, "E", "READPOS", strerror( errno ));
clean();
exit (2);
}
return 0;
}
/*-------------------------------------------------------------------*/
/* decomptrk - decompress track data */
/*-------------------------------------------------------------------*/
static int decomptrk(
BYTE *ibuf, /* input buffer address */
int ibuflen, /* input buffer length */
BYTE *obuf, /* output buffer address */
int obuflen, /* output buffer length */
int heads, /* >=0 means CKD, else FBA */
int trk, /* relative track or block number */
char *emsg /* addr of 81 byte msg buf or NULL */
)
/* ibuf points at CKDDASD_TRKHDR header followed by track data */
/* ibuflen specifies length of TRKHDR and data */
/* This code based on decompression logic in cdsk_valid_trk. */
/* Returns length of decompressed data or -1 on error. */
{
#if defined( HAVE_LIBZ ) || defined( CCKD_BZIP2 )
int rc; /* Return code */
#endif
unsigned int bufl; /* Buffer length */
#ifdef CCKD_BZIP2
unsigned int ubufl; /* when size_t != unsigned int */
#endif
#if !defined( HAVE_LIBZ ) && !defined( CCKD_BZIP2 )
UNREFERENCED(heads);
UNREFERENCED(trk);
UNREFERENCED(emsg);
#endif
memset(obuf, 0, obuflen); /* clear output buffer */
/* Uncompress the track/block image */
switch (ibuf[0] & CCKD_COMPRESS_MASK) {
case CCKD_COMPRESS_NONE:
bufl = (ibuflen < obuflen) ? ibuflen : obuflen;
memcpy (obuf, ibuf, bufl);
break;
#ifdef HAVE_LIBZ
case CCKD_COMPRESS_ZLIB:
memcpy (obuf, ibuf, CKDDASD_TRKHDR_SIZE);
bufl = obuflen - CKDDASD_TRKHDR_SIZE;
rc = uncompress(&obuf[CKDDASD_TRKHDR_SIZE],
(void *)&bufl,
&ibuf[CKDDASD_TRKHDR_SIZE],
ibuflen);
if (rc != Z_OK) {
if (emsg)
{
char msg[81];
MSGBUF(msg, "%s %d uncompress error, rc=%d;"
"%2.2x%2.2x%2.2x%2.2x%2.2x",
heads >= 0 ? "trk" : "blk", trk, rc,
ibuf[0], ibuf[1], ibuf[2], ibuf[3], ibuf[4]);
memcpy(emsg, msg, 81);
}
return -1;
}
bufl += CKDDASD_TRKHDR_SIZE;
break;
#endif
#ifdef CCKD_BZIP2
case CCKD_COMPRESS_BZIP2:
memcpy(obuf, ibuf, CKDDASD_TRKHDR_SIZE);
ubufl = obuflen - CKDDASD_TRKHDR_SIZE;
rc = BZ2_bzBuffToBuffDecompress (
(char *)&obuf[CKDDASD_TRKHDR_SIZE],
&ubufl,
(char *)&ibuf[CKDDASD_TRKHDR_SIZE],
ibuflen, 0, 0);
if (rc != BZ_OK) {
if (emsg)
{
char msg[81];
MSGBUF(msg, "%s %d decompress error, rc=%d;"
"%2.2x%2.2x%2.2x%2.2x%2.2x",
heads >= 0 ? "trk" : "blk", trk, rc,
ibuf[0], ibuf[1], ibuf[2], ibuf[3], ibuf[4]);
memcpy(emsg, msg, 81);
}
return -1;
}
bufl=ubufl;
bufl += CKDDASD_TRKHDR_SIZE;
break;
#endif
default:
return -1;
} /* switch (buf[0] & CCKD_COMPRESS_MASK) */
return bufl;
}
/*-------------------------------------------------------------------*/
/* show_ckd_count - display CKD dasd record COUNT field */
/*-------------------------------------------------------------------*/
/* RECHDR is stored in big-endian byte order. */
BYTE *show_ckd_count(CKDDASD_RECHDR *rh, int trk) {
int cc, hh, r, kl, dl;
BYTE *past;
cc = (rh->cyl[0] << 8) | (rh->cyl[1]);
hh = (rh->head[0] << 8) | (rh->head[1]);
r = rh->rec;
kl = rh->klen;
dl = (rh->dlen[0] << 8) | (rh->dlen[1]);
// "Track %d COUNT cyl[%04X/%d] head[%04X/%d] rec[%02X/%d] kl[%d] dl[%d]"
WRMSG( HHC02605, "I", trk, cc, cc, hh, hh, r, r, kl, dl );
past = (BYTE *)rh + sizeof(CKDDASD_RECHDR);
return past;
}
/*-------------------------------------------------------------------*/
/* show_ckd_key - display CKD dasd record KEY field */
/*-------------------------------------------------------------------*/
BYTE *show_ckd_key(CKDDASD_RECHDR *rh, BYTE *buf, int trk, int xop) {
if (rh->klen && xop) {
// "Track %d rec[%02X/%d] kl[%d]"
WRMSG( HHC02606, "I", trk, rh->rec, rh->rec, rh->klen );
data_dump(buf, rh->klen); printf("\n");
}
return (BYTE *)buf + rh->klen; /* skip past KEY field */
}
/*-------------------------------------------------------------------*/
/* show_ckd_data - display CKD dasd record DATA field */
/*-------------------------------------------------------------------*/
BYTE *show_ckd_data(CKDDASD_RECHDR *rh, BYTE *buf, int trk, int xop) {
int dl;
dl = (rh->dlen[0] << 8) | (rh->dlen[1]);
if (dl && xop) {
// "Track %d rec[%02X/%d] dl[%d]"
WRMSG( HHC02607, "I", trk, rh->rec, rh->rec, dl );
data_dump(buf, dl); printf("\n");
}
return buf + dl; /* skip past DATA field */
}
/*-------------------------------------------------------------------*/
/* showtrk - display track data */
/*-------------------------------------------------------------------*/
/* This code mimics selected logic in cdsk_valid_trk. */
void showtrk(
CKDDASD_TRKHDR *buf, /* track header ptr */
int imglen, /* TRKHDR + track user data length */
int trk, /* relative track number */
int xop /* 1=dump key & data blks; 0=don't */
) {
BYTE buf2[64*1024]; /* max uncompressed buffer */
char msg[81]; /* error message buffer */
CKDDASD_RECHDR *rh; /* CCKD COUNT field */
BYTE *bufp;
int len;
if (debug)
snap( 1, buf, imglen);
len = decomptrk(
(BYTE *)buf, /* input buffer address */
imglen, /* input buffer length */
buf2, /* output buffer address */
sizeof(buf2), /* output buffer length */
1, /* >=0 means CKD, else FBA */
trk, /* relative track or block number */
msg /* addr of message buffer */
);
if (debug)
snap( 0, buf2, len );
bufp = &buf2[sizeof(CKDDASD_TRKHDR)];
while (bufp < &buf2[sizeof(buf2)]) {
rh = (CKDDASD_RECHDR *)bufp;
if (memcmp((BYTE *)rh, &eighthexFF, 8) == 0) {
// "End of track"
WRMSG( HHC02608, "I" );
break;
}
bufp = show_ckd_count(rh, trk);
bufp = show_ckd_key(rh, bufp, trk, xop);
bufp = show_ckd_data(rh, bufp, trk, xop);
}
}
/*-------------------------------------------------------------------*/
/* offtify - given decimal or hex input string, return off_t */
/* Locale independent, does not check for overflow */
/* References <ctype.h> and <string.h> */
/*-------------------------------------------------------------------*/
/* Based on code in P. J. Plauger's "The Standard C Library" */
/* See page 34, in Chapter 2 (ctype.h) */
off_t offtify(char *s) {
static const char xd[] = {"0123456789abcdefABCDEF"};
static const char xv[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
10, 11, 12, 13, 14, 15,
10, 11, 12, 13, 14, 15};
off_t v;
char *p;
p = s;
if ( (*s == '0') && (*(s+1) == 'x') ) {
s = s + 2;
for (v = 0; isxdigit(*s); ++s)
v = (v << 4) + xv[strchr(xd, *s) - xd];
if (debug)
// "OFFTIFY hex string '%s' = 0x%16.16"PRIX64", dec %"PRId64"."
WRMSG( HHC90405, "D", p, (U64) v, (U64) v );
return v;
} else { /* decimal input */
v = (off_t) atoll(s);
if (debug)
// "OFFTIFY dec string '%s' = 0x%16.16"PRIX64", dec %"PRId64"."
WRMSG( HHC90406, "D", p, (U64) v, (U64) v );
return v;
}
}
/*-------------------------------------------------------------------*/
/* Main function for CCKD diagnostics */
/*-------------------------------------------------------------------*/
int main (int argc, char *argv[])
{
char *pgm; /* less any extension (.ext) */
int cckd_diag_rc = 0; /* Program return code */
char *fn; /* File name */
CKDDASD_DEVHDR devhdr; /* [C]CKD device hdr */
CCKDDASD_DEVHDR cdevhdr; /* Compressed CKD device hdr */
CKDDEV *ckd=0; /* CKD DASD table entry */
FBADEV *fba=0; /* FBA DASD table entry */
int cmd_devhdr = 0; /* display DEVHDR */
int cmd_cdevhdr = 0; /* display CDEVHDR */
int cmd_l1tab = 0; /* display L1TAB */
int cmd_l2tab = 0; /* display L2TAB */
int cmd_trkdata = 0; /* display track data */
int cmd_hexdump = 0; /* display track data (hex) */
int cmd_offset = 0; /* 1 = display data at */
int op_offset = 0; /* op_offset of length */
int op_length = 0; /* op_length */
int cmd_cchh = 0; /* 1 = display CCHH data */
int op_cc = 0; /* CC = cylinder */
int op_hh = 0; /* HH = head */
int cmd_tt = 0; /* 1 = display TT data */
int op_tt = 0; /* relative track # */
int swapend; /* 1 = New endianess doesn't
match machine endianess */
int n, trk=0, l1ndx=0, l2ndx=0;
off_t l2taboff=0; /* offset to assoc. L2 table */
int ckddasd; /* 1=CKD dasd 0=FBA dasd */
int heads=0; /* Heads per cylinder */
off_t trkhdroff=0; /* offset to assoc. trk hdr */
int imglen=0; /* track length */
char pathname[MAX_PATH]; /* file path in host format */
INITIALIZE_UTILITY( UTILITY_NAME, "CCKD diagnostic program", &pgm );
printf("\n");
/* parse the arguments */
argc--;
argv++ ;
while (argc > 0) {
if(**argv != '-') break;
switch(argv[0][1]) {
case 'v': if (argv[0][2] != '\0') return syntax (pgm);
return 0;
case 'd': if (argv[0][2] != '\0') return syntax (pgm);
cmd_devhdr = 1;
break;
case 'c': if (argv[0][2] != '\0') return syntax (pgm);
cmd_cdevhdr = 1;
break;
case '1': if (argv[0][2] != '\0') return syntax (pgm);
cmd_l1tab = 1;
break;
case '2': if (argv[0][2] != '\0') return syntax (pgm);
cmd_l2tab = 1;
break;
case 'a': if (argv[0][2] != '\0') return syntax (pgm);
cmd_cchh = 1;
argc--; argv++;
op_cc = offtify(*argv);
argc--; argv++;
op_hh = offtify(*argv);
break;
case 'r': if (argv[0][2] != '\0') return syntax (pgm);
cmd_tt = 1;
argc--; argv++;
op_tt = offtify(*argv);
break;
case 'o': if (argv[0][2] != '\0') return syntax (pgm);
cmd_offset = 1;
argc--;
argv++;
op_offset = offtify(*argv);
argc--;
argv++;
op_length = offtify(*argv);
break;
case 't': if (argv[0][2] != '\0') return syntax (pgm);
cmd_trkdata = 1;
break;
case 'x': if (argv[0][2] != '\0') return syntax (pgm);
cmd_hexdump = 1;
cmd_trkdata = 1;
break;
case 'g': if (argv[0][2] != '\0') return syntax (pgm);
debug = 1;
break;
default: return syntax (pgm);
}
argc--;
argv++;
}
if (argc != 1) return syntax (pgm);
fn = argv[0];
/* open the file */
hostpath(pathname, fn, sizeof(pathname));
fd = HOPEN(pathname, O_RDONLY | O_BINARY);
if (fd < 0) {
fprintf(stderr,
_("cckddiag: error opening file %s: %s\n"),
fn, strerror(errno));
return -1;
}
/*---------------------------------------------------------------*/
/* display DEVHDR - first 512 bytes of dasd image */
/*---------------------------------------------------------------*/
readpos(fd, &devhdr, 0, sizeof(devhdr));
if (cmd_devhdr) {
printf("\nDEVHDR - %d (decimal) bytes:\n",
(int)sizeof(devhdr));
data_dump(&devhdr, sizeof(devhdr)); printf("\n");
}
/*---------------------------------------------------------------*/
/* Determine CKD or FBA device type */
/*---------------------------------------------------------------*/
if (memcmp(devhdr.devid, "CKD_C370", 8) == 0
|| memcmp(devhdr.devid, "CKD_S370", 8) == 0) {
ckddasd = 1;
ckd = dasd_lookup(DASD_CKDDEV, NULL, devhdr.devtype, 0);
if (ckd == NULL) {
fprintf(stderr,
"DASD table entry not found for devtype 0x%2.2X\n",
devhdr.devtype);
clean();
exit(5);
}
}
else
if (memcmp(devhdr.devid, "FBA_C370", 8) == 0
|| memcmp(devhdr.devid, "FBA_S370", 8) == 0) {
ckddasd = 0;
fba = dasd_lookup(DASD_FBADEV, NULL, devhdr.devtype, 0);
if (fba == NULL) {
fprintf(stderr,
"DASD table entry not found for "
"devtype 0x%2.2X\n",
DEFAULT_FBA_TYPE);
clean();
exit(6);
}
}
else {
fprintf(stderr, "incorrect header id\n");
clean();
return -1;
}
/*---------------------------------------------------------------*/
/* Set up device characteristics */
/*---------------------------------------------------------------*/
if (ckddasd) {
heads = ((U32)(devhdr.heads[3]) << 24)
| ((U32)(devhdr.heads[2]) << 16)
| ((U32)(devhdr.heads[1]) << 8)
| (U32)(devhdr.heads[0]);
if (debug)
// "%s device has %d heads/cylinder"
WRMSG( HHC90407, "D", ckd->name, heads);
}
/*---------------------------------------------------------------*/
/* display CDEVHDR - follows DEVHDR */
/*---------------------------------------------------------------*/
readpos(fd, &cdevhdr, CKDDASD_DEVHDR_SIZE, sizeof(cdevhdr));
if (cmd_cdevhdr) {
printf("\nCDEVHDR - %d (decimal) bytes:\n",
(int)sizeof(cdevhdr));
data_dump(&cdevhdr, sizeof(cdevhdr)); printf("\n");
}
/*---------------------------------------------------------------*/
/* Find machine endian-ness */
/*---------------------------------------------------------------*/
/* cckd_endian() returns 1 for big-endian machines */
swapend = (cckd_endian() !=
((cdevhdr.options & CCKD_BIGENDIAN) != 0));
/*---------------------------------------------------------------*/
/* display L1TAB - follows CDEVHDR */
/*---------------------------------------------------------------*/
/* swap numl1tab if needed */
n = cdevhdr.numl1tab;
if (swapend) cckd_swapend4((char *)&n);
l1 = makbuf(n * CCKD_L1ENT_SIZE, "L1TAB");
readpos(fd, l1, CCKD_L1TAB_POS, n * CCKD_L1ENT_SIZE);
/* L1TAB itself is not adjusted for endian-ness */
if (cmd_l1tab) {
printf("\nL1TAB - %d (0x%X) bytes:\n",
(int)(n * CCKD_L1ENT_SIZE), (unsigned int)(n * CCKD_L1ENT_SIZE));
data_dump(l1, n * CCKD_L1ENT_SIZE); printf("\n");
}
/*---------------------------------------------------------------*/
/* display OFFSET, LENGTH data */
/*---------------------------------------------------------------*/
if (cmd_offset) {
bulk = makbuf(op_length, "BULK");
readpos(fd, bulk, op_offset, op_length);
printf(
"\nIMAGE OFFSET %d (0x%8.8X) "
"of length %d (0x%8.8X) bytes:\n",
op_offset, op_offset, op_length, op_length);
data_dump(bulk, op_length); printf("\n");
free(bulk);
bulk = NULL;
}
/*---------------------------------------------------------------*/
/* FBA isn't supported here because I don't know much about FBA */
/*---------------------------------------------------------------*/
if ( (!ckddasd) && ((cmd_cchh) || (cmd_tt)) ) {
fprintf(stderr, "CCHH/reltrk not supported for FBA\n");
clean();
exit(3);
}
/*---------------------------------------------------------------*/
/* Setup CCHH or relative track request */
/*---------------------------------------------------------------*/
if (ckddasd) {
if (cmd_tt) {
trk = op_tt;
op_cc = trk / heads;
op_hh = trk % heads;
} else {
trk = (op_cc * heads) + op_hh;
}
l1ndx = trk / cdevhdr.numl2tab;
l2ndx = trk % cdevhdr.numl2tab;
l2taboff = l1[l1ndx];
if (swapend) cckd_swapend4((char *)&l2taboff);
}
/*---------------------------------------------------------------*/
/* display CKD CCHH or relative track data */
/*---------------------------------------------------------------*/
if ((cmd_cchh) || (cmd_tt)) {
printf(
"CC %d HH %d = reltrk %d; "
"L1 index = %d, L2 index = %d\n"
"L1 index %d = L2TAB offset %d (0x%8.8X)\n",
op_cc, op_hh, trk,
l1ndx, l2ndx,
l1ndx, (int)l2taboff, (int)l2taboff);
l2 = makbuf(cdevhdr.numl2tab * sizeof(CCKD_L2ENT), "L2TAB");
readpos(fd, l2, l2taboff,
cdevhdr.numl2tab * sizeof(CCKD_L2ENT));
if (cmd_l2tab) {
printf(
"\nL2TAB - %d (decimal) bytes\n",
(int)(cdevhdr.numl2tab * sizeof(CCKD_L2ENT)));
data_dump(l2, (cdevhdr.numl2tab * sizeof(CCKD_L2ENT)) ); printf("\n");
}
printf("\nL2 index %d = L2TAB entry %d bytes\n",
l2ndx, (int)sizeof(CCKD_L2ENT) );
data_dump(&l2[l2ndx], sizeof(CCKD_L2ENT) ); printf("\n");
trkhdroff = l2[l2ndx].pos;
imglen = l2[l2ndx].len;
if (swapend) {
cckd_swapend4((char *)&trkhdroff);
cckd_swapend4((char *)&imglen);
}
printf("\nTRKHDR offset %d (0x%8.8X); "
"length %d (0x%4.4X)\n",
(int)trkhdroff, (int)trkhdroff, imglen, imglen);
tbuf = makbuf(imglen, "TRKHDR+DATA");
readpos(fd, tbuf, trkhdroff, imglen);
printf("\nTRKHDR track %d\n", trk);
data_dump(tbuf, sizeof(CKDDASD_TRKHDR) ); printf("\n");
if (cmd_trkdata) showtrk(tbuf, imglen, trk, cmd_hexdump);
free(l2); free(tbuf);
l2 = NULL; tbuf = NULL;
}
/* Close file, exit */
clean();
return cckd_diag_rc;
}