-
Notifications
You must be signed in to change notification settings - Fork 92
/
cckddiag.c
951 lines (808 loc) · 32.4 KB
/
cckddiag.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
/* 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"
#include "hercules.h"
#include "dasdblks.h"
#include "ccwarn.h"
#define UTILITY_NAME "cckddiag"
#define UTILITY_DESC "CCKD/CFBA diagnostic program"
/*-------------------------------------------------------------------*/
/* Exit codes */
/*-------------------------------------------------------------------*/
#define EXIT_ERROR_LOGIC_ERROR -99
#define EXIT_ERROR_SYNTAX -1
#define EXIT_NORMAL_SUCCESS 0
#define EXIT_SEEK_ERROR 1
#define EXIT_READ_ERROR 2
#define EXIT_NO_FBA_CCHH 3
#define EXIT_MALLOC_FAILED 4
#define EXIT_NO_CKD_DASDTAB 5
#define EXIT_NO_FBA_DASDTAB 6
#define EXIT_DATA_NOTFOUND 7
#define EXIT_OPEN_ERROR 8
#define EXIT_WRONG_CCKD_TYPE 9
/*-------------------------------------------------------------------*/
/* CKD DASD record stats structure */
/*-------------------------------------------------------------------*/
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 */
/*-------------------------------------------------------------------*/
static CCKD_L1ENT *L1tab = NULL; /* Level 1 table pointer */
static CCKD_L2ENT *L2tab = NULL; /* Level 2 table pointer */
static void *tbuf = NULL; /* track header & data */
static void *bulk = NULL; /* bulk data buffer */
static int fd = 0; /* File descriptor */
static int debug = 0; /* disable debug code */
static int pausesnap = 0; /* 1 = pause after snap */
/*-------------------------------------------------------------------*/
/* Common ErrExit function */
/*-------------------------------------------------------------------*/
static void ErrExit( int rc )
{
exit( rc ); // common breakpoint location
}
/*-------------------------------------------------------------------*/
/* print syntax */
/*-------------------------------------------------------------------*/
static void syntax(char *pgm)
{
// "Usage: %s ...
WRMSG( HHC02600, "I", pgm );
ErrExit( EXIT_ERROR_SYNTAX );
}
/*-------------------------------------------------------------------*/
/* clean - cleanup before exit */
/*-------------------------------------------------------------------*/
static void clean()
{
close(fd);
free(L1tab); /* L1TAB buffer */
free(L2tab); /* L2TAB buffer */
free(tbuf); /* track and header buffer */
free(bulk); /* offset data buffer */
}
/*-------------------------------------------------------------------*/
/* makbuf - allocate buffer, handle errors (exit if any) */
/*-------------------------------------------------------------------*/
static void *makbuf(int len, char *label)
{
void *p;
if (!(p = malloc( len )))
{
// "From %s: Storage allocation of size %d using %s failed"
FWRMSG( stderr, HHC02602, "S", label, len, "malloc()" );
clean();
ErrExit( EXIT_MALLOC_FAILED );
}
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. */
/*-------------------------------------------------------------------*/
static int readpos
(
int fd, /* opened CCKD image file */
void* buf, /* buffer of size len */
off_t offset, /* read offset into CCKD image */
unsigned int len /* length of data to read */
)
{
int rc;
if (debug)
{
// "READPOS seeking %"PRId64" (0x%16.16"PRIX64")"
WRMSG( HHC90401, "D", offset, offset );
}
if (lseek( fd, offset, SEEK_SET ) < 0)
{
// "lseek() to pos 0x%16.16"PRIx64" error: %s"
FWRMSG( stderr, HHC02603, "S",
offset, strerror( errno ));
clean();
ErrExit( EXIT_SEEK_ERROR );
}
if (debug)
{
// "READPOS reading buf addr %p length %d (0x%X)"
WRMSG( HHC90402, "D", buf, len, len);
}
rc = read( fd, buf, len);
if (rc < (int) len )
{
if (rc < 0)
{
// "%s%s"
FWRMSG( stderr, HHC02604, "S", "read() error: ", strerror( errno ));
}
else if (rc == 0)
{
// "%s%s"
FWRMSG( stderr, HHC02604, "S", "read() error: ", "unexpected EOF" );
}
else
{
// "%s%s"
FWRMSG( stderr, HHC02604, "S", "read() error: ", "short block" );
}
clean();
ErrExit( EXIT_READ_ERROR );
}
return 0;
}
/*-------------------------------------------------------------------*/
/* decomptrk - decompress track data */
/*-------------------------------------------------------------------*/
/* */
/* ibuf points at CKD_TRKHDR header followed by track data */
/* ibuflen specifies length of TRKHDR and data */
/* */
/* Returns length of decompressed data or -1 on error. */
/* */
/* This code based on decompression logic in cdsk_valid_trk. */
/*-------------------------------------------------------------------*/
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 */
)
{
#if defined( HAVE_ZLIB ) || defined( CCKD_BZIP2 )
int rc; /* Return code */
#endif
unsigned int bufl; /* Buffer length */
#if defined( CCKD_BZIP2 )
unsigned int ubufl; /* when size_t != unsigned int */
#endif
#if !defined( HAVE_ZLIB ) && !defined( CCKD_BZIP2 )
UNREFERENCED(heads);
UNREFERENCED(trk);
UNREFERENCED(emsg);
#endif
memset(obuf, 0, obuflen);
/* 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;
#if defined( HAVE_ZLIB )
case CCKD_COMPRESS_ZLIB:
memcpy (obuf, ibuf, CKD_TRKHDR_SIZE);
bufl = obuflen - CKD_TRKHDR_SIZE;
rc = uncompress(&obuf[ CKD_TRKHDR_SIZE ],
(void *)&bufl,
&ibuf[ CKD_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 += CKD_TRKHDR_SIZE;
break;
#endif
#if defined( CCKD_BZIP2 )
case CCKD_COMPRESS_BZIP2:
memcpy(obuf, ibuf, CKD_TRKHDR_SIZE);
ubufl = obuflen - CKD_TRKHDR_SIZE;
rc = BZ2_bzBuffToBuffDecompress
(
(char *)&obuf[ CKD_TRKHDR_SIZE ],
&ubufl,
(char *)&ibuf[ CKD_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 += CKD_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. */
/*-------------------------------------------------------------------*/
static BYTE *show_ckd_count(CKD_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 + CKD_RECHDR_SIZE;
return past;
}
/*-------------------------------------------------------------------*/
/* show_ckd_key - display CKD dasd record KEY field */
/*-------------------------------------------------------------------*/
static BYTE *show_ckd_key(CKD_RECHDR *rh, BYTE *buf, int trk, bool hexdump)
{
if (hexdump && rh->klen)
{
// "Track %d rec[%02X/%d] %s[%d]:"
printf("\n");
WRMSG( HHC02606, "I", trk, rh->rec, rh->rec, "kl", 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 */
/*-------------------------------------------------------------------*/
static BYTE* show_ckd_data( CKD_RECHDR* rh, BYTE* buf, int trk, bool hexdump)
{
int dl;
dl = (rh->dlen[0] << 8) | (rh->dlen[1]);
if (hexdump && dl)
{
// "Track %d rec[%02X/%d] %s[%d]:"
printf("\n");
WRMSG( HHC02606, "I", trk, rh->rec, rh->rec, "dl", dl );
data_dump( buf, dl );
printf("\n");
}
return buf + dl; /* skip past DATA field */
}
/*-------------------------------------------------------------------*/
/* show_fba_block - display FBA dasd block DATA */
/*-------------------------------------------------------------------*/
static void show_fba_block( BYTE* buf, int blk, bool hexdump )
{
if (hexdump)
{
// "Block %d:"
WRMSG( HHC02616, "I", blk );
data_dump( buf, 512 );
printf("\n");
}
}
/*-------------------------------------------------------------------*/
/* snap - display msg, dump data */
/*-------------------------------------------------------------------*/
#define COMPRESSED 1
#define EXPANDED 0
static void snap( int comp, void *data, int len, bool ckddasd )
{
if (comp)
{
// "SHOW%s Compressed %s header and data:"
WRMSG( HHC90403, "D",
ckddasd ? "TRK" : "BKG",
ckddasd ? "track" : "block group" );
data_dump( data, len );
}
else // EXPANDED
{
// "SHOW%s Decompressed %s header and data:"
WRMSG( HHC90404, "D",
ckddasd ? "TRK" : "BKG",
ckddasd ? "track" : "block group" );
data_dump( data, len );
}
if (pausesnap)
{
// "%s"
printf("\n");
WRMSG( HHC02601, "A", "Press enter to continue" );
getc( stdin );
}
}
/*-------------------------------------------------------------------*/
/* showtrkorblk - display track or block data */
/* This code mimics selected logic in cdsk_valid_trk. */
/*-------------------------------------------------------------------*/
static void showtrkorblk
(
CKD_TRKHDR* buf, /* track header ptr */
int imglen, /* TRKHDR + track user data length */
int trk, /* relative track or block number */
bool ckddasd, /* true = CKD dasd false = FBA dasd */
bool hexdump /* true=dump key & data blks; false=don't*/
)
{
BYTE buf2[64*1024]; /* max uncompressed buffer */
char msg[81]; /* error message buffer */
CKD_RECHDR* rh; /* CCKD COUNT field */
BYTE* bufp; /* Decompressed data pointer */
int len; /* Decompressed data length */
if (debug)
{
snap( COMPRESSED, buf, imglen, ckddasd );
printf("\n");
}
/* Expand (decompress) the CKD track or FBA block group */
len = decomptrk
(
(BYTE *)buf, /* input buffer address */
imglen, /* input buffer length */
buf2, /* output buffer address */
sizeof(buf2), /* output buffer length */
ckddasd ? +1 : -1, /* >=0 means CKD, else FBA */
trk, /* relative track or block number */
msg /* addr of message buffer */
);
if (debug)
{
snap( EXPANDED, buf2, len, ckddasd );
printf("\n");
}
bufp = &buf2[ CKD_TRKHDR_SIZE];
if (ckddasd)
{
while (bufp < &buf2[ sizeof( buf2 )])
{
rh = (CKD_RECHDR*) bufp;
if (memcmp( (BYTE*) rh, &CKD_ENDTRK, CKD_ENDTRK_SIZE ) == 0)
{
// "%s"
WRMSG( HHC02601, "I", "End of track" );
break;
}
bufp = show_ckd_count ( rh, trk);
bufp = show_ckd_key ( rh, bufp, trk, hexdump );
bufp = show_ckd_data ( rh, bufp, trk, hexdump );
}
}
else // FBA
{
/* Extract block number of first block in block group */
FBA_BKGHDR* blkghdr = (FBA_BKGHDR*) buf;
U32 blknum = fetch_fw( blkghdr->blknum );
/* Calculate relative block number within block group */
U32 grpblk = (trk - blknum);
/* Index to desired block within expanded block group */
bufp += grpblk * 512;
/* Show desired block data */
show_fba_block( bufp, trk, hexdump );
}
}
/*-------------------------------------------------------------------*/
/* 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) */
/*-------------------------------------------------------------------*/
static 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((unsigned char)*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"."
printf("\n");
WRMSG( HHC90406, "D", p, (U64) v, (U64) v );
}
return v;
}
}
/*-------------------------------------------------------------------*/
/* Main function for CCKD diagnostics */
/*-------------------------------------------------------------------*/
int main (int argc, char *argv[])
{
int cckd_diag_rc = 0; /* Program return code */
char* pgm; /* less any extension (.ext) */
char* fn; /* File name */
CKD_DEVHDR devhdr; /* CKD device hdr */
CCKD_DEVHDR cdevhdr; /* Compressed CKD device hdr */
CKDDEV* ckd = NULL; /* CKD DASD table entry */
FBADEV* fba = NULL; /* FBA DASD table entry */
bool cmd_devhdr = false; /* display DEVHDR */
bool cmd_cdevhdr = false; /* display CDEVHDR */
bool cmd_l1tab = false; /* display L1TAB */
bool cmd_l2tab = false; /* display L2TAB */
bool cmd_trkdata = false; /* display track data */
bool cmd_hexdump = false; /* display track data (hex) */
bool cmd_offset = false; /* true = display data at */
int op_offset = 0; /* op_offset of length */
int op_length = 0; /* op_length */
bool cmd_cchh = false; /* true = display CCHH data */
int op_cc = 0; /* CC = cylinder */
int op_hh = 0; /* HH = head */
bool cmd_tt = false; /* true = display TT data */
int op_tt = 0; /* relative track/block # */
int heads = 0; /* Heads per cylinder */
int trk = 0; /* Track or block number */
int imglen = 0; /* track length */
int L1ndx = 0; /* Index into Level 1 table */
int L2ndx = 0; /* Index into Level 2 table */
off_t L2taboff = 0; /* offset to assoc. L2 table */
off_t trkhdroff = 0; /* offset to assoc. trk hdr */
bool ckddasd = false; /* true=CKD dasd, false=FBA */
bool swapend = false; /* 1 = New endianness doesn't
match machine endianness */
int num_L1tab; /* Number of L1tab entries */
char pathname[ MAX_PATH ]; /* file path in host format */
INITIALIZE_UTILITY( UTILITY_NAME, UTILITY_DESC, &pgm );
/* parse the arguments */
argc--; argv++;
while (argc > 0)
{
if (**argv != '-')
break;
switch(argv[0][1])
{
case 'v':
if (argv[0][2] != '\0')
{
syntax (pgm);
}
ErrExit( EXIT_NORMAL_SUCCESS );
break; /* Useless but prevents warning */
case 'd': if (argv[0][2] != '\0') syntax (pgm);
cmd_devhdr = true;
break;
case 'c': if (argv[0][2] != '\0') syntax (pgm);
cmd_cdevhdr = true;
break;
case '1': if (argv[0][2] != '\0') syntax (pgm);
cmd_l1tab = true;
break;
case '2': if (argv[0][2] != '\0') syntax (pgm);
cmd_l2tab = true;
break;
case 'a': if (argv[0][2] != '\0') syntax (pgm);
cmd_cchh = true;
argc--; argv++;
op_cc = (int) offtify(*argv);
argc--; argv++;
op_hh = (int) offtify(*argv);
break;
case 'r': if (argv[0][2] != '\0') syntax (pgm);
cmd_tt = true;
argc--; argv++;
op_tt = (int) offtify(*argv);
break;
case 'o': if (argv[0][2] != '\0') syntax (pgm);
cmd_offset = true;
argc--; argv++;
op_offset = (int) offtify(*argv);
argc--; argv++;
op_length = (int) offtify(*argv);
break;
case 't': if (argv[0][2] != '\0') syntax (pgm);
cmd_trkdata = true;
break;
case 'x': if (argv[0][2] != '\0') syntax (pgm);
cmd_hexdump = true;
cmd_trkdata = true;
break;
case 'g': if (argv[0][2] != '\0') syntax (pgm);
debug = 1;
break;
default: syntax (pgm);
}
argc--; argv++;
}
if (argc != 1)
syntax (pgm);
printf("\n");
fn = argv[0];
/* open the file */
hostpath( pathname, fn, sizeof( pathname ));
fd = HOPEN( pathname, O_RDONLY | O_BINARY );
if (fd < 0)
{
// "error opening file %s: %s"
FWRMSG( stderr, HHC02607, "E", fn, strerror( errno ));
ErrExit( EXIT_OPEN_ERROR );
}
/*---------------------------------------------------------------*/
/* display DEVHDR - first 512 bytes of dasd image */
/*---------------------------------------------------------------*/
readpos( fd, &devhdr, 0, CKD_DEVHDR_SIZE );
if (cmd_devhdr)
{
BYTE* p = (BYTE*) &devhdr;
// "%s - %d (decimal) bytes:"
printf("\n");
WRMSG( HHC02614, "I", "DEVHDR", (int) CKD_DEVHDR_SIZE );
// Note: first 8 bytes of DEVHDR is in ASCII, but
// the data_dump function dumps 16 bytes per line.
data_dump_ascii ( p, 16 );
data_dump_offset( p + 16, CKD_DEVHDR_SIZE, 16 );
printf("\n");
}
/*---------------------------------------------------------------*/
/* Determine CKD or FBA device type */
/*---------------------------------------------------------------*/
if (is_dh_devid_typ( devhdr.dh_devid, CKD32_CMP_OR_SF_TYP ))
{
ckddasd = true;
ckd = dasd_lookup( DASD_CKDDEV, NULL, devhdr.dh_devtyp, 0 );
if (!ckd)
{
// "DASD table entry not found for devtype 0x%2.2X"
FWRMSG( stderr, HHC02608, "S", devhdr.dh_devtyp );
clean();
ErrExit( EXIT_NO_CKD_DASDTAB );
}
}
else if (is_dh_devid_typ( devhdr.dh_devid, FBA32_CMP_OR_SF_TYP ))
{
ckddasd = false;
fba = dasd_lookup( DASD_FBADEV, NULL, devhdr.dh_devtyp, 0 );
if (!fba)
{
// "DASD table entry not found for devtype 0x%2.2X"
FWRMSG( stderr, HHC02608, "S", DEFAULT_FBA_TYPE );
clean();
ErrExit( EXIT_NO_FBA_DASDTAB );
}
}
else
{
// "%s%s"
FWRMSG( stderr, HHC02604, "E", "incorrect header id", "" );
clean();
ErrExit( EXIT_WRONG_CCKD_TYPE );
}
/*---------------------------------------------------------------*/
/* Set up device characteristics */
/*---------------------------------------------------------------*/
if (ckddasd)
{
FETCH_LE_FW( heads, devhdr.dh_heads );
if (debug)
{
// "%s device has %d heads/cylinder"
WRMSG( HHC90407, "D", ckd->name, heads);
}
}
/*---------------------------------------------------------------*/
/* display CDEVHDR - follows DEVHDR */
/*---------------------------------------------------------------*/
readpos( fd, &cdevhdr, CKD_DEVHDR_SIZE, sizeof( cdevhdr ));
if (cmd_cdevhdr)
{
// "%s - %d (decimal) bytes:"
printf("\n");
WRMSG( HHC02614, "I", "CDEVHDR", (int) sizeof( cdevhdr ));
data_dump( &cdevhdr, sizeof( cdevhdr ));
printf("\n");
}
/*---------------------------------------------------------------*/
/* Find machine endian-ness */
/* cckd_def_opt_bigend() returns 1 for big-endian machines */
/*---------------------------------------------------------------*/
swapend = (cckd_def_opt_bigend() !=
((cdevhdr.cdh_opts & CCKD_OPT_BIGEND) != 0));
/*---------------------------------------------------------------*/
/* display L1TAB - follows CDEVHDR */
/*---------------------------------------------------------------*/
/* swap num_L1tab if needed */
num_L1tab = cdevhdr.num_L1tab;
if (swapend)
num_L1tab = SWAP32( num_L1tab );
L1tab = makbuf( num_L1tab * CCKD_L1ENT_SIZE, "L1TAB" );
readpos( fd, L1tab, CCKD_L1TAB_POS, num_L1tab * CCKD_L1ENT_SIZE );
/* L1TAB itself is NOT adjusted for endian-ness */
if (cmd_l1tab)
{
// "%s - %d (decimal) bytes:"
printf("\n");
WRMSG( HHC02614, "I", "L1TAB", (int) (num_L1tab * CCKD_L1ENT_SIZE) );
data_dump( L1tab, num_L1tab * CCKD_L1ENT_SIZE );
printf("\n");
}
/*---------------------------------------------------------------*/
/* display OFFSET, LENGTH data */
/*---------------------------------------------------------------*/
if (cmd_offset)
{
bulk = makbuf(op_length, "BULK");
readpos(fd, bulk, op_offset, op_length);
// "%s offset %"PRId64" (0x%16.16"PRIX64"); length %d (0x%8.8X) bytes%s"
printf("\n");
WRMSG( HHC02613, "I", "IMAGE",
(U64) op_offset, (U64) op_offset, op_length, op_length, ":" );
data_dump( bulk, op_length );
printf("\n");
free(bulk);
bulk = NULL;
}
/*---------------------------------------------------------------*/
/* FBA devices don't have cylinders or heads */
/*---------------------------------------------------------------*/
if (!ckddasd && cmd_cchh)
{
// "%s%s"
FWRMSG( stderr, HHC02604, "S", "CCHH not supported for FBA", "" );
clean();
ErrExit( EXIT_NO_FBA_CCHH );
}
/*---------------------------------------------------------------*/
/* 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.num_L2tab;
L2ndx = trk % cdevhdr.num_L2tab;
}
/*---------------------------------------------------------------*/
/* For FBA devices a relative track is treated as a block number */
/*---------------------------------------------------------------*/
if (!ckddasd && cmd_tt)
{
int blkgrp = (trk = op_tt) / CFBA_BLKS_PER_GRP;
L1ndx = blkgrp / cdevhdr.num_L2tab;
L2ndx = blkgrp % cdevhdr.num_L2tab;
}
/*---------------------------------------------------------------*/
/* Verify device is large enough for the request */
/*---------------------------------------------------------------*/
if (L1ndx >= num_L1tab)
{
// "%s %d does not exist on this device"
FWRMSG( stderr, HHC02617, "S", ckddasd ? "Track" : "Block", trk );
clean();
ErrExit( EXIT_DATA_NOTFOUND );
}
L2taboff = L1tab[ L1ndx ];
if (swapend)
L2taboff = SWAP_OFF_T( L2taboff );
/*---------------------------------------------------------------*/
/* Display CKD CCHH or relative track or FBA relative block data */
/*---------------------------------------------------------------*/
if ((cmd_cchh) || (cmd_tt))
{
if (ckddasd)
// "CC %d HH %d = reltrk %d; L1 index = %d, L2 index = %d"
WRMSG( HHC02609, "I", op_cc, op_hh, trk, L1ndx, L2ndx );
else
// "Block %d; L1 index = %d, L2 index = %d"
WRMSG( HHC02615, "I", trk, L1ndx, L2ndx );
// "L1 index %d = L2TAB offset %"PRId64" (0x%16.16"PRIX64")"
WRMSG( HHC02610, "I", L1ndx, L2taboff, L2taboff );
// PROGRAMMING NOTE: for whatever reason, base dasd image files
// use a L2_trkoff value of zero in their L1tab entry for non-
// existent tracks, whereas shadow files use a value of -1, so
// we need to check for both.
if (!L2taboff || L2taboff == CCKD_MAXSIZE)
{
// "L2tab for %s %d not found"
FWRMSG( stderr, HHC02618, "S", ckddasd ? "track" : "block", trk );
clean();
ErrExit( EXIT_DATA_NOTFOUND );
}
L2tab = makbuf( cdevhdr.num_L2tab * CCKD_L2ENT_SIZE, "L2TAB" );
readpos( fd, L2tab, L2taboff, cdevhdr.num_L2tab * CCKD_L2ENT_SIZE );
if (cmd_l2tab)
{
// "%s - %d (decimal) bytes:"
printf("\n");
WRMSG( HHC02614, "I", "L2TAB",
(int) (cdevhdr.num_L2tab * CCKD_L2ENT_SIZE) );
data_dump( L2tab, (cdevhdr.num_L2tab * CCKD_L2ENT_SIZE));
}
// "L2 index %d = L2TAB entry: %d bytes:"
printf("\n");
WRMSG( HHC02611, "I", L2ndx, (int) CCKD_L2ENT_SIZE);
data_dump( &L2tab[ L2ndx ], CCKD_L2ENT_SIZE);
printf("\n");
trkhdroff = L2tab[ L2ndx ].L2_trkoff;
imglen = L2tab[ L2ndx ].L2_len;
if (swapend)
{
trkhdroff = SWAP_OFF_T( trkhdroff );
imglen = SWAP32( imglen );
}
// "%s offset %"PRId64" (0x%16.16"PRIX64"); length %d (0x%8.8X) bytes%s"
WRMSG( HHC02613, "I", ckddasd ? "TRKHDR" : "BKGHDR",
trkhdroff, trkhdroff, imglen, imglen, "" );
/* Verify device contains the requested track/block */
if (!trkhdroff || !imglen)
{
// "%s %d not found"
FWRMSG( stderr, HHC02619, "S", ckddasd ? "Track" : "Block", trk );
clean();
ErrExit( EXIT_DATA_NOTFOUND );
}
tbuf = makbuf(imglen, ckddasd ? "TRKHDR+DATA" : "BKGHDR+DATA");
readpos(fd, tbuf, trkhdroff, imglen);
// "%sHDR %s %d:"
WRMSG( HHC02612, "I", ckddasd ? "TRK" : "BKG",
ckddasd ? "track" : "block", trk );
data_dump( tbuf, CKD_TRKHDR_SIZE);
printf("\n");
if (cmd_trkdata)
showtrkorblk( tbuf, imglen, trk, ckddasd, cmd_hexdump );
free(L2tab);
free(tbuf);
L2tab = NULL;
tbuf = NULL;
}
/* Close file, exit */
clean();
ErrExit( cckd_diag_rc );
UNREACHABLE_CODE( return EXIT_ERROR_LOGIC_ERROR );
}