File: scsi-openserver.c

package info (click to toggle)
cdrkit 9:1.1.11-3
  • links: PTS
  • area: main
  • in suites: bullseye, buster, jessie, jessie-kfreebsd, sid, stretch
  • size: 7,464 kB
  • sloc: ansic: 107,182; perl: 968; sh: 481; makefile: 229; sed: 4
file content (1015 lines) | stat: -rw-r--r-- 26,003 bytes parent folder | download | duplicates (5)
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
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
/*
 * This file has been modified for the cdrkit suite.
 *
 * The behaviour and appearence of the program code below can differ to a major
 * extent from the version distributed by the original author(s).
 *
 * For details, see Changelog file distributed with the cdrkit package. If you
 * received this file from another source then ask the distributing person for
 * a log of modifications.
 *
 */

/* @(#)scsi-openserver.c	1.31 04/01/15 Copyright 1998 J. Schilling, Santa Cruz Operation */
/*
 *	Interface for the SCO SCSI implementation.
 *
 *	Warning: you may change this source, but if you do that
 *	you need to change the _usal_version and _usal_auth* string below.
 *	You may not return "schily" for an SCG_AUTHOR request anymore.
 *	Choose your name instead of "schily" and make clear that the version
 *	string is related to a modified source.
 *
 *	Copyright (c) 1998 J. Schilling, Santa Cruz Operation
 */
/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; see the file COPYING.  If not, write to the Free Software
 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#undef	sense

#include <sys/scsicmd.h>

/*
 *	Warning: you may change this source, but if you do that
 *	you need to change the _usal_version and _usal_auth* string below.
 *	You may not return "schily" for an SCG_AUTHOR request anymore.
 *	Choose your name instead of "schily" and make clear that the version
 *	string is related to a modified source.
 */
static	char	_usal_trans_version[] = "scsi-openserver.c-1.31";	/* The version for this transport*/

#define	MAX_SCG		16		/* Max # of cdrom devices */
#define	MAX_TGT		16		/* Not really needed	  */
#define	MAX_LUN		8		/* Not really needed	  */

#define	MAX_DMA		(64*1024)

#define	MAXPATH		256		/* max length of devicepath  */
#define	MAXLINE		80		/* max length of input line  */
#define	MAXSCSI		99		/* max number of mscsi lines */
#define	MAXDRVN		10		/* max length of drivername  */

#define	DEV_DIR		"/tmp"
#define	DEV_NAME	"usal.s%1dt%1dl%1d"

/*
 * ---------------------------------------------------------------------
 * We will only deal with cdroms by default! Only if you set a specific
 * environment variable, we will scan "all" devices !
 * Set LIBSCG_SCAN_ALL to any value to enable access to all your SCSI
 * devices.
 *
 * The upcoming support for USB will be for USB 1.1, so as this is not
 * tested yet, we will currently ignore drives connect to the USB stack
 * (usbha controller) regardless of having set LIBSCG_SCAN_ALL or not!
 */

#define	DEV_ROOT	"/dev/dsk/0s0"

#define	DEV_SDSK	"/dev/rdsk/%ds0"
#define	DEV_SROM	"/dev/rcd%d"
#define	DEV_STP		"/dev/xStp%d"
#define	DEV_SFLP	"/dev/rdsk/fp%dh"

#define	SCAN_DEV	"%s%s%d%d%d%d"

#define	SCSI_CFG	"/etc/sconf -r"		/* no. of configured devices  */
#define	SCSI_DEV	"/etc/sconf -g %d"	/* read line 'n' of mscsi tbl */

#define	DRV_ATAPI	"wd"		/* SCO OpenServer IDE driver	*/
#define	DRV_USB		"usbha"		/* SCO OpenServer USB driver	*/
#define	DRV_NOHA	"noha"		/* IDE/ATAPI device configured,	*/
					/* but missing !		*/


#define	T_DISK		"Sdsk"		/* SCO OpenServer SCSI disk	*/
#define	T_CDROM		"Srom"		/* SCO OpenServer SCSI cdrom	*/
#define	T_TAPE		"Stp"		/* SCO OpenServer SCSI tape	*/
#define	T_FLOPPY	"Sflp"		/* SCO OpenServer SCSI floppy	*/


/*
 * ---------------------------------------------------------------------
 * Environment variables to control certain functionality
 */

#define	SCAN_ALL	"LIBSCG_SCAN_ALL"	/* enable access for all devices */
#define	SCSI_USER_CMD	"LIBSCG_SCSIUSERCMD"	/* use old SCSIUSERCMD ioctl() */
#define	DMA_OVERRIDE	"LIBSCG_MAX_DMA"	/* override MAX_DMA value */
#define	ENABLE_USB	"LIBSCG_ENABLE_USB"	/* enable access of USB devices */

static	int	scan_all	= 0;	/* don't scan all devices by default */
static	int	scsiusercmd	= 0;	/* use SCSIUSERCMD2 ioctl by default */
static	int	enable_usb	= 0;	/* don't scan USB devices by default */
static	long	max_dma		= MAX_DMA; /* use MAX_DMA DMA buffer by default */


/*
 * ---------------------------------------------------------------------
 * There are two scsi passthrough ioctl() on SCO OpenServer 5.0.[45],
 * while there is only one available on SCO OpenServer 5.0.[02].
 *
 * The SCSIUSERCMD ioctl is available on all OpenServer 5
 *
 * The SCSIUSERCMD2 ioctl which executes the usercmd and reads the sense
 * in one go, is only available from 5.0.4 onwards.
 *
 * By default we will use the SCSIUSERCMD2 ioctl(), in order to execute
 * the SCSIUSERCMD ioctl() instead set the environment variable
 * LIBSCG_SCSIUSERCMD to any value. Using the olderSCSIUSERCMD ioctl() will
 * if the SCSI commands returns a CHECK CONDITION status, run a seperate
 * REQUEST_SENSE command immediately. But we need to remember that in a
 * multi-tasking environment, there might be other code which has accessed
 * the device in between these two steps and therefore the sense code
 * is no longer valid !!!
 *
 * NOTE: There are problems with the usage of AHA 154X controllers
 * and SCSIUSERCMD2 such as nonsense (weird) output on cdrecord -scanbus
 *
 */


typedef struct usal2sdi {

	int	valid;
	int	open;
	int	atapi;
	int	fd;
	int	lmscsi;

} usal2sdi_t;

static	usal2sdi_t	sdidevs [MAX_SCG][MAX_TGT][MAX_LUN];

typedef struct amscsi {
	char	typ[MAXDRVN];
	char	drv[MAXDRVN];
	int	hba;
	int	bus;
	int	usal;
	int	tgt;
	int	lun;
	char	dev[MAXPATH];

} amscsi_t;

struct usal_local {
	short	usalfiles[MAX_SCG][MAX_TGT][MAX_LUN];
};
#define	usallocal(p)	((struct usal_local *)((p)->local))

static	int	sort_mscsi(const void *l1, const void *l2);
static	int	openserver_init(SCSI *usalp);
static	void	cp_usal2sco(struct scsicmd2 *sco, struct usal_cmd *usal);
static	void	cp_sco2usal(struct scsicmd2 *sco, struct usal_cmd *usal);

/*
 * -------------------------------------------------------------------------
 * SCO OpenServer does not have a generic scsi device driver, which can
 * be used to access any configured scsi device. But we can use the "Sxxx"
 * scsi peripherial drivers passthrough ioctl() (SCSIUSERCMD / SCSIUSERCMD2)
 * to send scsi user comands to any target device controlled by the
 * corresponding target driver.
 *
 * This passthrough implementation for libusal currently allows to
 * handle the following devices classes:
 *
 *	1. DISK		handled by Sdsk
 *	2. CD-ROM	handled by Srom
 *	3. TAPES	handled by Stp
 *	4. FLOPPY	handled by Sflp
 *
 * NOTE: The libusal OpenServer passthrough routines have changed with
 *       cdrecord-1.8 to enable the -scanbus option. Therefore the
 *	 addressing scheme is now the same as used on many other platforms
 *	 like Solaris, Linux etc.
 *
 *   ===============================================================
 *   RUN 'cdrecord -scanbus' TO SEE THE DEVICE ADDRESSES YOU CAN USE
 *   ===============================================================
 *
 */

/*
 * Return version information for the low level SCSI transport code.
 * This has been introduced to make it easier to trace down problems
 * in applications.
 */
static char *
usalo_version(SCSI *usalp, int what)
{
	if (usalp != (SCSI *)0) {
		switch (what) {

		case SCG_VERSION:
			return (_usal_trans_version);
		/*
		 * If you changed this source, you are not allowed to
		 * return "schily" for the SCG_AUTHOR request.
		 */
		case SCG_AUTHOR:
			return (_usal_auth_cdrkit);
		case SCG_SCCS_ID:
			return (__sccsid);
		}
	}
	return ((char *)0);
}

static int
usalo_help(SCSI *usalp, FILE *f)
{
	__usal_help(f, "SCSIUSERCMD/SCSIUSERCMD2", "Generic SCSI",
		"", "bus,target,lun", "1,2,0", TRUE, FALSE);
	return (0);
}

/*
 * ---------------------------------------------------------------
 * This routine sorts the amscsi_t lines on the following columns
 * in ascending order:
 *
 *	1. drv  - driver name
 *	2. bus  - scsibus per controller
 *	3. tgt  - target id of device
 *	4. lun  - lun of the device
 *
 */


static int
sort_mscsi(const void *l1, const void *l2)
{
	amscsi_t	*t1 = (amscsi_t *) l1;
	amscsi_t	*t2 = (amscsi_t *) l2;

	if (strcmp(t1->drv, t2->drv) == 0) {
		if (t1->bus < t2->bus) {
			return (-1);

		} else if (t1->bus > t2->bus) {
			return (1);

		} else if (t1->tgt < t2->tgt) {
			return (-1);

		} else if (t1->tgt > t2->tgt) {
			return (1);

		} else if (t1->lun < t2->lun) {
			return (-1);

		} else if (t1->lun > t2->lun) {
			return (1);
		} else {
			return (0);
		}
	} else {
		return (strcmp(t1->drv, t2->drv));
	}
}

/*
 * ---------------------------------------------------------------
 * This routine is introduced to find all scsi devices which are
 * currently configured into the kernel. This is done by reading
 * the dynamic kernel mscsi tables and parse the resulting lines.
 * As the output of 'sconf' is not directly usable the information
 * found is to be sorted and re-arranged to be used with the libusal
 * routines.
 *
 * NOTE: One problem is currently still not solved ! If you don't
 *       have a media in your CD-ROM/CD-Writer we are not able to
 *       do an open() and therefore will set the drive to be not
 *       available (valid=0).
 *
 *       This will for example cause cdrecord to not list the drive
 *	 in the -scanbus output.
 *
 */

static int
openserver_init(SCSI *usalp)
{
	FILE		*cmd;
	int		nusal  = -1, lhba  = -1, lbus = -1;
	int		nSrom = -1, nSdsk = -1, nStp = -1, nSflp = -1;
	int		atapi, fd, nopen = 0;
	int		pos = 0, len = 0, nlm = 0;
	int		s = 0, t = 0, l = 0;
	int		ide_rootdisk = 0;
	long		dma_override = 0;
	int		mscsi;
	char		sconf[MAXLINE];
	char		lines[MAXLINE];
	char		drvid[MAXDRVN];
	amscsi_t	cmtbl[MAXSCSI];
	char		dname[MAXPATH];
	char		**evsave;
extern	char		**environ;


	for (s = 0; s < MAX_SCG; s++) {
		for (t = 0; t < MAX_TGT; t++) {
			for (l = 0; l < MAX_LUN; l++) {
				sdidevs[s][t][l].valid	=  0;
				sdidevs[s][t][l].open	= -1;
				sdidevs[s][t][l].atapi	= -1;
				sdidevs[s][t][l].fd	= -1;
				sdidevs[s][t][l].lmscsi	= -1;
			}
		}
	}

	/* Check whether we want to use the older SCSIUSERCMD ioctl() */

	if (getenv(SCSI_USER_CMD) != NULL) {
		scsiusercmd = 1;
	}

	/*
	 * Check whether we want to scan all devices
	 */
	if (getenv(SCAN_ALL) != NULL) {
		scan_all = 1;
	}

	/*
	 * Check whether we want to use USB devices
	 */
	if (getenv(ENABLE_USB) != NULL) {
		enable_usb = 1;
	}

	/*
	 * Check whether we want to override the MAX_DMA value
	 */
	if (getenv(DMA_OVERRIDE) != NULL) {
		dma_override = atol(getenv(DMA_OVERRIDE));
		if ((dma_override >= 1) && (dma_override <= (256)))
			max_dma = dma_override * 1024;
	}


	/* read sconf -r and get number of kernel mscsi lines ! */

	evsave = environ;
	environ = 0;
	if ((cmd = popen(SCSI_CFG, "r")) == NULL) {
		if (usalp->errstr)
			snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
				"Error popen() for \"%s\"",
				SCSI_CFG);
		environ = evsave;
		return (-1);
	}
	environ = evsave;

	if (fgets(lines, MAXLINE, cmd) == NULL) {
		errno = EIO;
		if (usalp->errstr)
			snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
				"Error reading popen() for \"%s\"",
				SCSI_CFG);
		return (-1);
	} else
		nlm = atoi(lines);

	if (usalp->debug > 0) {
		fprintf((FILE *)usalp->errfile, "-------------------- \n");
		fprintf((FILE *)usalp->errfile, "mscsi lines = %d\n", nlm);
		fprintf((FILE *)usalp->errfile, "-------------------- \n");
	}

	if (pclose(cmd) == -1) {
		if (usalp->errstr)
			snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
				"Error pclose() for \"%s\"",
				SCSI_CFG);
		return (-1);
	}

	for (l = 0; l < nlm; l++) {

		/* initialize cmtbl entry */

		cmtbl[l].hba = -1;
		cmtbl[l].bus = -1;
		cmtbl[l].tgt = -1;
		cmtbl[l].lun = -1;
		cmtbl[l].usal = -1;

		memset(cmtbl[l].typ, '\0', MAXDRVN);
		memset(cmtbl[l].drv, '\0', MAXDRVN);
		memset(cmtbl[l].dev, '\0', MAXDRVN);

		/* read sconf -g 'n' and get line of kernel mscsi table!  */
		/* the order the lines will be received in will determine */
		/* the device name we can use to open the device	  */

		snprintf(sconf, sizeof (sconf),
			SCSI_DEV, l + 1); /* enumeration starts with 1 */

		evsave = environ;
		environ = 0;
		if ((cmd = popen(sconf, "r")) == NULL) {
			if (usalp->errstr)
				snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
					"Error popen() for \"%s\"",
					sconf);
			environ = evsave;
			return (-1);
		}
		environ = evsave;

		if (fgets(lines, MAXLINE, cmd) == NULL)
			break;

		if (pclose(cmd) == -1) {
			if (usalp->errstr)
				snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
					"Error pclose() for \"%s\"",
					sconf);
			return (-1);
		}

		sscanf(lines, SCAN_DEV, cmtbl[l].typ,
					cmtbl[l].drv,
					&cmtbl[l].hba,
					&cmtbl[l].bus,
					&cmtbl[l].tgt,
					&cmtbl[l].lun);

		if (strstr(cmtbl[l].typ, T_DISK) != NULL) {
			snprintf(cmtbl[l].dev,  sizeof (cmtbl[l].dev),
					DEV_SDSK, ++nSdsk);
		}

		if (strstr(cmtbl[l].typ, T_CDROM) != NULL) {
			snprintf(cmtbl[l].dev,  sizeof (cmtbl[l].dev),
					DEV_SROM, ++nSrom);
		}

		if (strstr(cmtbl[l].typ, T_TAPE) != NULL) {
			snprintf(cmtbl[l].dev, sizeof (cmtbl[l].dev),
					DEV_STP, ++nStp);
		}

		if (strstr(cmtbl[l].typ, T_FLOPPY) != NULL) {
			snprintf(cmtbl[l].dev, sizeof (cmtbl[l].dev),
					DEV_SFLP, ++nSflp);
		}

		if (usalp->debug > 0) {
			fprintf((FILE *)usalp->errfile,
				"%-4s = %5s(%d,%d,%d,%d) -> %s\n",
				cmtbl[l].typ,
				cmtbl[l].drv,
				cmtbl[l].hba,
				cmtbl[l].bus,
				cmtbl[l].tgt,
				cmtbl[l].lun,
				cmtbl[l].dev);
		}

	}

	if (usalp->debug > 0) {
		fprintf((FILE *)usalp->errfile, "-------------------- \n");
		fprintf((FILE *)usalp->errfile, "%2d DISK  \n", nSdsk + 1);
		fprintf((FILE *)usalp->errfile, "%2d CD-ROM\n", nSrom + 1);
		fprintf((FILE *)usalp->errfile, "%2d TAPE  \n", nStp  + 1);
		fprintf((FILE *)usalp->errfile, "%2d FLOPPY\n", nSflp + 1);
		fprintf((FILE *)usalp->errfile, "-------------------- \n");
	}

	/* ok, now let's sort this array of scsi devices	*/

	qsort((void *) cmtbl, nlm, sizeof (amscsi_t), sort_mscsi);

	if (usalp->debug > 0) {
		for (l = 0; l < nlm; l++)
		fprintf((FILE *)usalp->errfile,
			"%-4s = %5s(%d,%d,%d,%d) -> %s\n",
			cmtbl[l].typ,
			cmtbl[l].drv,
			cmtbl[l].hba,
			cmtbl[l].bus,
			cmtbl[l].tgt,
			cmtbl[l].lun,
			cmtbl[l].dev);
		fprintf((FILE *)usalp->errfile, "-------------------- \n");
	}

	/* find root disk controller to make it usal 0		*/

	/*
	 * if we have disk(s) found in the mscsi table, we still
	 * don't know if the rootdisk is among these, there can
	 * be a IDE rootdisk as well, but it's not listed in
	 * the mscsi table.
	 */

	t = 0;
	if (nSdsk > 0) {
		for (l = 0; l < nlm; l++)
			if (strcmp(cmtbl[l].dev, DEV_ROOT) == 0)
				t = l;
	} else {

		/*
		 * we haven't found a disk in mscsi, so we definitely
		 * have an IDE disk on a wd adapter as IDE disks are
		 * not listed as SCSI disks in the kernel mscsi table
		 */
		ide_rootdisk = 1;

	}

	if (!(ide_rootdisk) && (usalp->debug > 0)) {
		fprintf((FILE *)usalp->errfile,
			"root = %5s(%d,%d,%d,%d) -> %s\n",
			cmtbl[t].drv,
			cmtbl[t].hba,
			cmtbl[t].bus,
			cmtbl[t].tgt,
			cmtbl[t].lun,
			cmtbl[t].dev);
		fprintf((FILE *)usalp->errfile, "-------------------- \n");
	}

	/* calculate usal from drv, hba and bus 			*/

	strcpy(drvid, "");

	for (l = 0, s = t; l < nlm; l++, s = (t + l) % nlm) {

		if (strcmp(drvid, cmtbl[s].drv) != 0) {
			strcpy(drvid, cmtbl[s].drv);
			lhba = cmtbl[s].hba;
			lbus = cmtbl[s].bus;
			cmtbl[s].usal = ++nusal;

		} else if (cmtbl[s].hba != lhba) {
			lhba = cmtbl[s].hba;
			lbus = cmtbl[s].bus;
			cmtbl[s].usal = ++nusal;

		} else if (cmtbl[s].bus != lbus) {
			lbus = cmtbl[s].bus;
			cmtbl[s].usal = ++nusal;
		} else {
			cmtbl[s].usal = nusal;
		}
		sdidevs[cmtbl[s].usal][cmtbl[s].tgt][cmtbl[s].lun].open   = 0;

		/* check whether we want to open all devices or it's a CDROM */

		if ((scan_all) || (strcmp(cmtbl[s].typ, T_CDROM) == 0))
			sdidevs[cmtbl[s].usal][cmtbl[s].tgt][cmtbl[s].lun].valid = 1;

		/* check whether we have an IDE/ATAPI device */

		if (strcmp(cmtbl[s].drv, DRV_ATAPI) == 0)
			sdidevs[cmtbl[s].usal][cmtbl[s].tgt][cmtbl[s].lun].atapi = 1;

		/* don't open a USB device if enable_usb is not set */

		if (strcmp(cmtbl[s].drv, DRV_USB) == 0)
			sdidevs[cmtbl[s].usal][cmtbl[s].tgt][cmtbl[s].lun].valid = enable_usb;

		/* don't open a IDE/ATAPI device which is missing but configured */

		if (strcmp(cmtbl[s].drv, DRV_NOHA) == 0)
			sdidevs[cmtbl[s].usal][cmtbl[s].tgt][cmtbl[s].lun].valid = 0;


		sdidevs[cmtbl[s].usal][cmtbl[s].tgt][cmtbl[s].lun].lmscsi = s;

	}


	/* open all yet valid device nodes */

	for (s = 0; s < MAX_SCG; s++) {
		for (t = 0; t < MAX_TGT; t++) {
			for (l = 0; l < MAX_LUN; l++) {

				if (sdidevs[s][t][l].valid == 0)
					continue;

				/* Open pass-through device node */

				mscsi = sdidevs[s][t][l].lmscsi;

				strcpy(dname, cmtbl[mscsi].dev);

	/*
	 * ------------------------------------------------------------------
	 * NOTE: If we can't open the device, we will set the device invalid!
	 * ------------------------------------------------------------------
	 */
				errno = 0;
				if ((fd = open(dname, (O_RDONLY | O_NONBLOCK))) < 0) {
					sdidevs[s][t][l].valid = 0;
					if (usalp->debug > 0) {
						fprintf((FILE *)usalp->errfile,
							"%5s(%d,%d,%d,%d) -> %s open() failed: errno = %d (%s)\n",
							cmtbl[mscsi].drv,
							cmtbl[mscsi].hba,
							cmtbl[mscsi].bus,
							cmtbl[mscsi].tgt,
							cmtbl[mscsi].lun,
							cmtbl[mscsi].dev,
							errno,
							strerror(errno));
					}
					continue;
				}

				if (usalp->debug > 0) {
					fprintf((FILE *)usalp->errfile,
						"%d,%d,%d => %5s(%d,%d,%d,%d) -> %d : %s \n",
						s, t, l,
						cmtbl[mscsi].drv,
						cmtbl[mscsi].hba,
						cmtbl[mscsi].bus,
						cmtbl[mscsi].tgt,
						cmtbl[mscsi].lun,
						cmtbl[mscsi].usal,
						cmtbl[mscsi].dev);
				}

				sdidevs[s][t][l].fd   = fd;
				sdidevs[s][t][l].open = 1;
				nopen++;
				usallocal(usalp)->usalfiles[s][t][l] = (short) fd;
			}
		}
	}

	if (usalp->debug > 0) {
		fprintf((FILE *)usalp->errfile, "-------------------- \n");
		fprintf((FILE *)usalp->errfile, "nopen = %d devices   \n", nopen);
		fprintf((FILE *)usalp->errfile, "-------------------- \n");
	}

	return (nopen);
}


static int
usalo_open(SCSI *usalp, char *device)
{
	int	busno	= usal_scsibus(usalp);
	int	tgt	= usal_target(usalp);
	int	tlun	= usal_lun(usalp);
	int	f, b, t, l;
	int	nopen = 0;
	char	devname[64];

	if (busno >= MAX_SCG || tgt >= MAX_TGT || tlun >= MAX_LUN) {
		errno = EINVAL;
		if (usalp->errstr)
			snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
				"Illegal value for busno, target or lun '%d,%d,%d'",
				busno, tgt, tlun);
		return (-1);
	}

	if (usalp->local == NULL) {
		usalp->local = malloc(sizeof (struct usal_local));
		if (usalp->local == NULL)
			return (0);

		for (b = 0; b < MAX_SCG; b++) {
			for (t = 0; t < MAX_TGT; t++) {
				for (l = 0; l < MAX_LUN; l++)
					usallocal(usalp)->usalfiles[b][t][l] = (short)-1;
			}
		}
	}

	if (*device != '\0') {		/* we don't allow old dev usage */
		errno = EINVAL;
		if (usalp->errstr)
			snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
			"Open by 'devname' no longer supported on this OS");
		return (-1);
	}

	return (openserver_init(usalp));

}

static int
usalo_close(SCSI *usalp)
{
	register int	f;
	register int	b;
	register int	t;
	register int	l;

	if (usalp->local == NULL)
		return (-1);

	for (b = 0; b < MAX_SCG; b++) {
		for (t = 0; t < MAX_TGT; t++) {
			for (l = 0; l < MAX_LUN; l++) {

				f = usallocal(usalp)->usalfiles[b][t][l];
				if (f >= 0)
					close(f);

				sdidevs[b][t][l].fd    = -1;
				sdidevs[b][t][l].open  =  0;
				sdidevs[b][t][l].valid =  0;

				usallocal(usalp)->usalfiles[b][t][l] = (short)-1;
			}
		}
	}
	return (0);
}

static long
usalo_maxdma(SCSI *usalp, long amt)
{
	return (max_dma);
}


static void *
usalo_getbuf(SCSI *usalp, long amt)
{
	if (usalp->debug > 0) {
		fprintf((FILE *)usalp->errfile,
			"usalo_getbuf: %ld bytes\n", amt);
	}
	usalp->bufbase = valloc((size_t)(amt));

	return (usalp->bufbase);
}

static void
usalo_freebuf(SCSI *usalp)
{
	if (usalp->bufbase)
		free(usalp->bufbase);
	usalp->bufbase = NULL;
}

static BOOL
usalo_havebus(SCSI *usalp, int busno)
{
	register int	t;
	register int	l;

	if (busno < 0 || busno >= MAX_SCG)
		return (FALSE);

	if (usalp->local == NULL)
		return (FALSE);

	for (t = 0; t < MAX_TGT; t++) {
		for (l = 0; l < MAX_LUN; l++)
			if (usallocal(usalp)->usalfiles[busno][t][l] >= 0)
				return (TRUE);
	}
	return (FALSE);
}

static int
usalo_fileno(SCSI *usalp, int busno, int tgt, int tlun)
{
	if (busno < 0 || busno >= MAX_SCG ||
	    tgt   < 0 || tgt   >= MAX_TGT ||
	    tlun  < 0 || tlun  >= MAX_LUN)
		return (-1);

	if (usalp->local == NULL)
		return (-1);

	return ((int)usallocal(usalp)->usalfiles[busno][tgt][tlun]);
}

static int
usalo_initiator_id(SCSI *usalp)
{
	return (-1);

	/*
	 * We don't know the initiator ID yet, but we can if we parse the
	 * output of the command 'cat /dev/string/cfg | grep "%adapter"'
	 *
	 * Sample line:
	 *
	 *	%adapter 0xE800-0xE8FF 11 - type=alad ha=0 bus=0 id=7 fts=sto
	 *
	 * This tells us that the alad controller 0 has an id of 7 !
	 * The parsing should be done in openserver_init().
	 *
	 */
}

static int
usalo_isatapi(SCSI *usalp)
{
	return (sdidevs[usal_scsibus(usalp)][usal_target(usalp)][usal_lun(usalp)].atapi);
}

static int
usalo_reset(SCSI *usalp, int what)
{
	errno = EINVAL;
	return (-1);		/* no scsi reset available */
}

static void
cp_usal2sco(struct scsicmd2 *sco, struct usal_cmd *usal)
{
	sco->cmd.data_ptr = (char *) usal->addr;
	sco->cmd.data_len = usal->size;
	sco->cmd.cdb_len  = usal->cdb_len;

	sco->sense_len    = usal->sense_len;
	sco->sense_ptr    = usal->u_sense.cmd_sense;

	if (!(usal->flags & SCG_RECV_DATA) && (usal->size > 0))
		sco->cmd.is_write = 1;

	if (usal->cdb_len == SC_G0_CDBLEN)
		memcpy(sco->cmd.cdb, &usal->cdb.g0_cdb, usal->cdb_len);

	if (usal->cdb_len == SC_G1_CDBLEN)
		memcpy(sco->cmd.cdb, &usal->cdb.g1_cdb, usal->cdb_len);

	if (usal->cdb_len == SC_G5_CDBLEN)
		memcpy(sco->cmd.cdb, &usal->cdb.g5_cdb, usal->cdb_len);
}


static void
cp_sco2usal(struct scsicmd2 *sco, struct usal_cmd *usal)
{
	usal->size	= sco->cmd.data_len;

	memset(&usal->scb, 0, sizeof (usal->scb));

	if (sco->sense_len > SCG_MAX_SENSE)
		usal->sense_count = SCG_MAX_SENSE;
	else
		usal->sense_count = sco->sense_len;

	usal->resid = 0;

	usal->u_scb.cmd_scb[0] = sco->cmd.target_sts;

}


static int
usalo_send(SCSI *usalp)
{
	struct usal_cmd	*sp = usalp->scmd;
	struct scsicmd2	scsi_cmd;
	int		i;
	Uchar		sense_buf[SCG_MAX_SENSE];

	if (usalp->fd < 0) {
		sp->error = SCG_FATAL;
		return (0);
	}

	memset(&scsi_cmd, 0, sizeof (scsi_cmd));
	memset(sense_buf, 0, sizeof (sense_buf));
	scsi_cmd.sense_ptr = sense_buf;
	scsi_cmd.sense_len = sizeof (sense_buf);
	cp_usal2sco(&scsi_cmd, sp);

	errno = 0;
	sp->ux_errno = 0;
	sp->error = SCG_NO_ERROR;
	for (;;) {
		int		ioctlStatus;
		struct scsicmd	s_cmd;

		if (scsiusercmd) {	/* Use SCSIUSERCMD ioctl() */
			if (usalp->debug > 1) {
				fprintf((FILE *)usalp->errfile, "calling SCSIUSERCMD ioctl()\n");
			}

			if ((ioctlStatus = ioctl(usalp->fd, SCSIUSERCMD, &(scsi_cmd.cmd))) < 0) {
				if (usalp->debug > 1) {
					fprintf((FILE *)usalp->errfile, "returning from SCSIUSERCMD ioctl()\n");
				}
				if (errno == EINTR)
					continue;

				cp_sco2usal(&scsi_cmd, sp);
				sp->ux_errno = errno;
				if (errno == 0)
					sp->ux_errno = EIO;
				sp->error    = SCG_RETRYABLE;

				return (0);
			}

			if (usalp->debug > 1) {
				fprintf((FILE *)usalp->errfile, "returning from SCSIUSERCMD ioctl()\n");
			}
			cp_sco2usal(&scsi_cmd, sp);
			sp->ux_errno = errno;

			if (scsi_cmd.cmd.target_sts & 0x02) { /* Check Condition & get Sense */

				if (sp->sense_len > SCG_MAX_SENSE)
					sp->sense_len = SCG_MAX_SENSE;

				memset((caddr_t)&s_cmd, 0, sizeof (s_cmd));

				s_cmd.data_ptr  = (caddr_t) sp->u_sense.cmd_sense;
				s_cmd.data_len  = sp->sense_len;
				s_cmd.is_write  = 0;
				s_cmd.cdb[0]    = SC_REQUEST_SENSE;

				while (((ioctlStatus = ioctl(usalp->fd, SCSIUSERCMD, &s_cmd)) < 0) &&
					(errno == EINTR))
						;

				sp->sense_count = sp->sense_len;
				sp->ux_errno    = errno;

				if (errno == 0)
					sp->ux_errno = EIO;
				sp->error = SCG_NO_ERROR;
			}

			if (usalp->debug > 0) {
				if (errno != 0)
					fprintf((FILE *)usalp->errfile, "ux_errno: %d (%s) \n", sp->ux_errno, strerror(sp->ux_errno));
				if (sp->u_scb.cmd_scb[0] != 0)
					fprintf((FILE *)usalp->errfile, "tgt_stat: %d \n", sp->u_scb.cmd_scb[0]);
			}
			break;

		} else {		/* Use SCSIUSERCMD2 ioctl() */
			if (usalp->debug > 1) {
				fprintf((FILE *)usalp->errfile, "calling SCSIUSERCMD2 ioctl()\n");
			}

			if ((ioctlStatus = ioctl(usalp->fd, SCSIUSERCMD2, &scsi_cmd)) < 0) {
				if (usalp->debug > 1) {
					fprintf((FILE *)usalp->errfile, "returning from SCSIUSERCMD2 ioctl()\n");
				}
				if (errno == EINTR)
					continue;

				cp_sco2usal(&scsi_cmd, sp);
				sp->ux_errno = errno;
				if (errno == 0)
					sp->ux_errno = EIO;
				sp->error    = SCG_RETRYABLE;

				return (0);
			}
			if (usalp->debug > 1) {
				fprintf((FILE *)usalp->errfile, "returning from SCSIUSERCMD2 ioctl()\n");
			}

			cp_sco2usal(&scsi_cmd, sp);
			sp->ux_errno = errno;

			if (scsi_cmd.cmd.target_sts & 0x02) { /* Check Condition */
				if (errno == 0)
					sp->ux_errno = EIO;
				sp->error    = SCG_NO_ERROR;
			}

			if (usalp->debug > 0) {
				if (errno != 0)
					fprintf((FILE *)usalp->errfile, "ux_errno: %d (%s) \n", sp->ux_errno, strerror(sp->ux_errno));
				if (sp->u_scb.cmd_scb[0] != 0)
					fprintf((FILE *)usalp->errfile, "tgt_stat: %d \n", sp->u_scb.cmd_scb[0]);
			}
			break;

		}
	}

	return (0);
}

#define	sense	u_sense.Sense