176 static int osst_int_ioctl(OS_Scsi_Tape *STp, Scsi_Request ** aSRpnt, unsigned int cmd_in,unsigned l…
178 static int osst_set_frame_position(OS_Scsi_Tape *STp, Scsi_Request ** aSRpnt, int frame, int skip);
180 static int osst_get_frame_position(OS_Scsi_Tape *STp, Scsi_Request ** aSRpnt);
182 static int osst_flush_write_buffer(OS_Scsi_Tape *STp, Scsi_Request ** aSRpnt);
184 static int osst_write_error_recovery(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int pending);
606 static int osst_wait_ready(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, unsigned timeout, int initia…  in osst_wait_ready()  argument
626 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, SCSI_DATA_NONE, STp->timeout, MAX_READY_RETRIES, TRUE);  in osst_wait_ready()
627 	*aSRpnt = SRpnt;  in osst_wait_ready()
650 	*aSRpnt = SRpnt;  in osst_wait_ready()
655 	     osst_write_error_recovery(STp, aSRpnt, 0) ) {  in osst_wait_ready()
673 static int osst_wait_for_medium(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, unsigned timeout)  in osst_wait_for_medium()  argument
688 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, SCSI_DATA_NONE, STp->timeout, MAX_READY_RETRIES, TRUE);  in osst_wait_for_medium()
689 	*aSRpnt = SRpnt;  in osst_wait_for_medium()
710 	*aSRpnt = SRpnt;  in osst_wait_for_medium()
730 static int osst_position_tape_and_confirm(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int frame)  in osst_position_tape_and_confirm()  argument
734 	osst_wait_ready(STp, aSRpnt, 15 * 60, 0);			/* TODO - can this catch a write error? */  in osst_position_tape_and_confirm()
735 	retval = osst_set_frame_position(STp, aSRpnt, frame, 0);  in osst_position_tape_and_confirm()
737 	osst_wait_ready(STp, aSRpnt, 15 * 60, OSST_WAIT_POSITION_COMPLETE);  in osst_position_tape_and_confirm()
738 	return (osst_get_frame_position(STp, aSRpnt));  in osst_position_tape_and_confirm()
744 static int osst_flush_drive_buffer(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt)  in osst_flush_drive_buffer()  argument
761 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, SCSI_DATA_NONE, STp->timeout, MAX_WRITE_RETRIES, TRUE);  in osst_flush_drive_buffer()
762 	*aSRpnt = SRpnt;  in osst_flush_drive_buffer()
770 			result = osst_write_error_recovery(STp, aSRpnt, 0);  in osst_flush_drive_buffer()
772 	result |= osst_wait_ready(STp, aSRpnt, 5 * 60, delay);  in osst_flush_drive_buffer()
779 static int osst_wait_frame(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int curr, int minlast, int t…  in osst_wait_frame()  argument
792 		result = osst_get_frame_position (STp, aSRpnt);  in osst_wait_frame()
794 			if ((result = osst_write_error_recovery(STp, aSRpnt, 0)) == 0)  in osst_wait_frame()
838 static int osst_read_frame(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int timeout)  in osst_read_frame()  argument
850 		retval = osst_wait_frame (STp, aSRpnt, STp->first_frame_position, 0, timeout);  in osst_read_frame()
861 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, SCSI_DATA_READ,  in osst_read_frame()
863 	*aSRpnt = SRpnt;  in osst_read_frame()
907 static int osst_initiate_read(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt)  in osst_initiate_read()  argument
920                         osst_flush_write_buffer(STp, aSRpnt);  in osst_initiate_read()
921 			osst_flush_drive_buffer(STp, aSRpnt);  in osst_initiate_read()
937 …SRpnt   = osst_do_scsi(*aSRpnt, STp, cmd, 0, SCSI_DATA_NONE, STp->timeout, MAX_READ_RETRIES, TRUE);  in osst_initiate_read()
938 		*aSRpnt = SRpnt;  in osst_initiate_read()
945 static int osst_get_logical_frame(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int frame_seq_number,…  in osst_get_logical_frame()  argument
972 				osst_set_frame_position(STp, aSRpnt, STp->read_error_frame, 0);  in osst_get_logical_frame()
986 		if ( osst_initiate_read(STp, aSRpnt)  in osst_get_logical_frame()
987                 || ( (!STp->frame_in_buffer) && osst_read_frame(STp, aSRpnt, 30) ) ) {  in osst_get_logical_frame()
990 			position = osst_get_frame_position(STp, aSRpnt);  in osst_get_logical_frame()
1004 			osst_set_frame_position(STp, aSRpnt, position, 0);  in osst_get_logical_frame()
1025 			        	position = osst_get_frame_position(STp, aSRpnt)  in osst_get_logical_frame()
1037                         	osst_set_frame_position(STp, aSRpnt, position, 0);  in osst_get_logical_frame()
1043 		if (osst_get_frame_position(STp, aSRpnt) == 0xbaf) {  in osst_get_logical_frame()
1047 			osst_set_frame_position(STp, aSRpnt, 0xbb8, 0);  in osst_get_logical_frame()
1071 static int osst_seek_logical_blk(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int logical_blk_num)  in osst_seek_logical_blk()  argument
1105 	   osst_set_frame_position(STp, aSRpnt, ppos_estimate, 0);  in osst_seek_logical_blk()
1106 	   if (osst_get_logical_frame(STp, aSRpnt, frame_seq_estimate, 1) >= 0) {  in osst_seek_logical_blk()
1152 	   if (osst_get_logical_frame(STp, aSRpnt, -1, 1) < 0)  in osst_seek_logical_blk()
1180 static int osst_get_sector(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt)  in osst_get_sector()  argument
1203 		sector = osst_get_frame_position(STp, aSRpnt);  in osst_get_sector()
1210 static int osst_seek_sector(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int sector)  in osst_seek_sector()  argument
1226 		return (osst_set_frame_position(STp, aSRpnt, frame, 0));  in osst_seek_sector()
1228 	r = osst_set_frame_position(STp, aSRpnt, offset?frame:frame-1, 0);  in osst_seek_sector()
1231 	r = osst_get_logical_frame(STp, aSRpnt, -1, 1);  in osst_seek_sector()
1234 	if (osst_get_frame_position(STp, aSRpnt) != (offset?frame+1:frame)) return (-EIO);  in osst_seek_sector()
1273 static int osst_read_back_buffer_and_rewrite(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt,  in osst_read_back_buffer_and_rewrite()  argument
1276 	Scsi_Request  * SRpnt = * aSRpnt;  in osst_read_back_buffer_and_rewrite()
1320 			*aSRpnt = SRpnt;  in osst_read_back_buffer_and_rewrite()
1330 	*aSRpnt = SRpnt;  in osst_read_back_buffer_and_rewrite()
1331 	osst_get_frame_position(STp, aSRpnt);  in osst_read_back_buffer_and_rewrite()
1354 			osst_set_frame_position(STp, aSRpnt, new_frame + i, 0);  in osst_read_back_buffer_and_rewrite()
1355 			osst_wait_ready(STp, aSRpnt, 60, OSST_WAIT_POSITION_COMPLETE);  in osst_read_back_buffer_and_rewrite()
1356 			osst_get_frame_position(STp, aSRpnt);  in osst_read_back_buffer_and_rewrite()
1357 			SRpnt = * aSRpnt;  in osst_read_back_buffer_and_rewrite()
1437 		*aSRpnt = SRpnt;  in osst_read_back_buffer_and_rewrite()
1454 			osst_get_frame_position(STp, aSRpnt);  in osst_read_back_buffer_and_rewrite()
1467 static int osst_reposition_and_retry(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt,  in osst_reposition_and_retry()  argument
1493 			osst_set_frame_position(STp, aSRpnt, frame + skip, 1);  in osst_reposition_and_retry()
1499 		if (osst_get_frame_position(STp, aSRpnt) < 0) {		/* additional write error */  in osst_reposition_and_retry()
1519 			SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, SCSI_DATA_WRITE,  in osst_reposition_and_retry()
1521 			*aSRpnt = SRpnt;  in osst_reposition_and_retry()
1572 static int osst_write_error_recovery(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int pending)  in osst_write_error_recovery()  argument
1574 	Scsi_Request * SRpnt  = * aSRpnt;  in osst_write_error_recovery()
1601 	osst_get_frame_position(STp, aSRpnt);  in osst_write_error_recovery()
1614 			retval = osst_reposition_and_retry(STp, aSRpnt, frame, skip, pending);  in osst_write_error_recovery()
1616 			retval = osst_read_back_buffer_and_rewrite(STp, aSRpnt, frame, skip, pending);  in osst_write_error_recovery()
1624 		osst_set_frame_position(STp, aSRpnt, frame + STp->cur_frames + pending, 0);  in osst_write_error_recovery()
1629 		retval = osst_read_back_buffer_and_rewrite(STp, aSRpnt, frame, 1, pending);  in osst_write_error_recovery()
1633 		osst_set_frame_position(STp, aSRpnt, frame + STp->cur_frames + pending, 0);  in osst_write_error_recovery()
1635 	osst_get_frame_position(STp, aSRpnt);  in osst_write_error_recovery()
1649 static int osst_space_over_filemarks_backward(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt,  in osst_space_over_filemarks_backward()  argument
1659 	if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_backward()
1691 			osst_position_tape_and_confirm(STp, aSRpnt, last_mark_ppos);  in osst_space_over_filemarks_backward()
1692 			if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_backward()
1718 		osst_position_tape_and_confirm(STp, aSRpnt, last_mark_ppos);  in osst_space_over_filemarks_backward()
1720 		if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_backward()
1748 static int osst_space_over_filemarks_forward_slow(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt,  in osst_space_over_filemarks_forward_slow()  argument
1757 	if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_slow()
1764 		if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_slow()
1802 static int osst_space_over_filemarks_forward_fast(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt,  in osst_space_over_filemarks_forward_fast()  argument
1812 	if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_fast()
1848 			return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count);  in osst_space_over_filemarks_forward_fast()
1850 			osst_position_tape_and_confirm(STp, aSRpnt, next_mark_ppos);  in osst_space_over_filemarks_forward_fast()
1851 			if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_fast()
1888 					return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count);  in osst_space_over_filemarks_forward_fast()
1890 				osst_position_tape_and_confirm(STp, aSRpnt, STp->first_mark_ppos);  in osst_space_over_filemarks_forward_fast()
1891 				if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_fast()
1905 				if (osst_space_over_filemarks_backward(STp, aSRpnt, MTBSF, 1) < 0)  in osst_space_over_filemarks_forward_fast()
1917 				return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count - cnt);  in osst_space_over_filemarks_forward_fast()
1922 			osst_position_tape_and_confirm(STp, aSRpnt, next_mark_ppos);  in osst_space_over_filemarks_forward_fast()
1924 			if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_fast()
1953 static void osst_set_retries(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int retries)  in osst_set_retries()  argument
1956 	Scsi_Request     * SRpnt  = * aSRpnt;  in osst_set_retries()
1977 	*aSRpnt = SRpnt;  in osst_set_retries()
1985 static int osst_write_filemark(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt)  in osst_write_filemark()  argument
2002 	result  = osst_flush_write_buffer(STp, aSRpnt);  in osst_write_filemark()
2003 	result |= osst_flush_drive_buffer(STp, aSRpnt);  in osst_write_filemark()
2013 static int osst_write_eod(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt)  in osst_write_eod()  argument
2030 	result  = osst_flush_write_buffer(STp, aSRpnt);	  in osst_write_eod()
2031 	result |= osst_flush_drive_buffer(STp, aSRpnt);  in osst_write_eod()
2036 static int osst_write_filler(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int where, int count)  in osst_write_filler()  argument
2043 	osst_wait_ready(STp, aSRpnt, 60 * 5, 0);  in osst_write_filler()
2044 	osst_set_frame_position(STp, aSRpnt, where, 0);  in osst_write_filler()
2050 		if (osst_flush_write_buffer(STp, aSRpnt)) {  in osst_write_filler()
2058 	return osst_flush_drive_buffer(STp, aSRpnt);  in osst_write_filler()
2061 static int __osst_write_header(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int where, int count)  in __osst_write_header()  argument
2069 	osst_wait_ready(STp, aSRpnt, 60 * 5, 0);  in __osst_write_header()
2070 	osst_set_frame_position(STp, aSRpnt, where, 0);  in __osst_write_header()
2076 		if (osst_flush_write_buffer(STp, aSRpnt)) {  in __osst_write_header()
2081 	result = osst_flush_drive_buffer(STp, aSRpnt);  in __osst_write_header()
2088 static int osst_write_header(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int locate_eod)  in osst_write_header()  argument
2140 	result  = __osst_write_header(STp, aSRpnt, 0xbae, 5);  in osst_write_header()
2142 		    osst_write_filler(STp, aSRpnt, 0xbb3, 5);  in osst_write_header()
2143 	result &= __osst_write_header(STp, aSRpnt,     5, 5);  in osst_write_header()
2149 		osst_set_frame_position(STp, aSRpnt, STp->eod_frame_ppos, 0);  in osst_write_header()
2162 static int osst_reset_header(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt)  in osst_reset_header()  argument
2172 	return osst_write_header(STp, aSRpnt, 1);  in osst_reset_header()
2175 static int __osst_analyze_headers(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int ppos)  in __osst_analyze_headers()  argument
2188 		if (osst_set_frame_position(STp, aSRpnt, ppos, 0))  in __osst_analyze_headers()
2190 		osst_wait_ready(STp, aSRpnt, 60 * 15, 0);  in __osst_analyze_headers()
2191 		if (osst_initiate_read(STp, aSRpnt)) {  in __osst_analyze_headers()
2196 	if (osst_read_frame(STp, aSRpnt, 180)) {  in __osst_analyze_headers()
2353 static int osst_analyze_headers(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt)  in osst_analyze_headers()  argument
2360 	position = osst_get_frame_position(STp, aSRpnt);  in osst_analyze_headers()
2382 		if (__osst_analyze_headers(STp, aSRpnt, ppos))  in osst_analyze_headers()
2389 		if (__osst_analyze_headers(STp, aSRpnt, ppos))  in osst_analyze_headers()
2395 		osst_set_frame_position(STp, aSRpnt, 10, 0);  in osst_analyze_headers()
2402 	osst_set_frame_position(STp, aSRpnt, position, 0);  in osst_analyze_headers()
2408 static int osst_verify_position(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt)  in osst_verify_position()  argument
2425 		if (!osst_analyze_headers(STp, aSRpnt) ||  in osst_verify_position()
2434 		osst_set_frame_position(STp, aSRpnt, frame_position - 1, 0);  in osst_verify_position()
2435 		if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_verify_position()
2463 		osst_set_frame_position(STp, aSRpnt, frame_position - 1, 0);  in osst_verify_position()
2497 static int osst_configure_onstream(OS_Scsi_Tape *STp, Scsi_Request ** aSRpnt)  in osst_configure_onstream()  argument
2501 	Scsi_Request                    * SRpnt = * aSRpnt;  in osst_configure_onstream()
2537 	*aSRpnt = SRpnt;  in osst_configure_onstream()
2568 	*aSRpnt = SRpnt;  in osst_configure_onstream()
2580 	osst_set_retries(STp, aSRpnt, 0);  in osst_configure_onstream()
2581 	SRpnt = * aSRpnt;  in osst_configure_onstream()
2608 	*aSRpnt = SRpnt;  in osst_configure_onstream()
2623 	*aSRpnt = SRpnt;  in osst_configure_onstream()
2643 	*aSRpnt = SRpnt;  in osst_configure_onstream()
2668 static int cross_eof(OS_Scsi_Tape *STp, Scsi_Request ** aSRpnt, int forward)  in cross_eof()  argument
2681 	   result = osst_space_over_filemarks_forward_slow(STp, aSRpnt, MTFSF, 1);  in cross_eof()
2685 	   result = osst_seek_logical_blk(STp, aSRpnt, STp->logical_blk_num - 1);  in cross_eof()
2697 static int osst_get_frame_position(OS_Scsi_Tape *STp, Scsi_Request ** aSRpnt)  in osst_get_frame_position()  argument
2716 	SRpnt = osst_do_scsi(*aSRpnt, STp, scmd, 20, SCSI_DATA_READ,  in osst_get_frame_position()
2722 	*aSRpnt = SRpnt;  in osst_get_frame_position()
2775 static int osst_set_frame_position(OS_Scsi_Tape *STp, Scsi_Request ** aSRpnt, int ppos, int skip)  in osst_set_frame_position()  argument
2809 		SRpnt = osst_do_scsi(*aSRpnt, STp, scmd, 0, SCSI_DATA_NONE, STp->long_timeout,  in osst_set_frame_position()
2813 		*aSRpnt  = SRpnt;  in osst_set_frame_position()
2823 			osst_wait_ready(STp, aSRpnt, 5 * 60, OSST_WAIT_POSITION_COMPLETE);  in osst_set_frame_position()
2833 static int osst_write_trailer(OS_Scsi_Tape *STp, Scsi_Request ** aSRpnt, int leave_at_EOT)  in osst_write_trailer()  argument
2840 		result = osst_flush_drive_buffer(STp, aSRpnt);  in osst_write_trailer()
2842 		result = osst_write_filemark(STp, aSRpnt);  in osst_write_trailer()
2849 	result = osst_write_eod(STp, aSRpnt);  in osst_write_trailer()
2850 	osst_write_header(STp, aSRpnt, leave_at_EOT);  in osst_write_trailer()
2860 static int osst_flush_write_buffer(OS_Scsi_Tape *STp, Scsi_Request ** aSRpnt)  in osst_flush_write_buffer()  argument
2865 	Scsi_Request * SRpnt = *aSRpnt;  in osst_flush_write_buffer()
2875 			*aSRpnt = SRpnt = NULL;  in osst_flush_write_buffer()
2909 			result = osst_wait_frame (STp, aSRpnt, STp->first_frame_position, -50, 120);  in osst_flush_write_buffer()
2947 		SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, transfer, SCSI_DATA_WRITE,  in osst_flush_write_buffer()
2949 		*aSRpnt = SRpnt;  in osst_flush_write_buffer()
2968 				if (osst_write_error_recovery(STp, aSRpnt, 1)) {  in osst_flush_write_buffer()
2990 static int osst_flush_buffer(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int seek_next)  in osst_flush_buffer()  argument
3011 		return osst_flush_write_buffer(STp, aSRpnt);  in osst_flush_buffer()
3030 			result = cross_eof(STp, aSRpnt, FALSE); /* Back over the EOF hit */  in osst_flush_buffer()
3040 			result = osst_seek_logical_blk(STp, aSRpnt, STp->logical_blk_num - backspace);  in osst_flush_buffer()
3052 static int osst_write_frame(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, int synchronous)  in osst_write_frame()  argument
3065 		if (osst_flush_drive_buffer(STp, aSRpnt) < 0) {  in osst_write_frame()
3069 		if (osst_get_frame_position(STp, aSRpnt) < 0xbb8) {  in osst_write_frame()
3073 		osst_position_tape_and_confirm(STp, aSRpnt, 0xbb8);  in osst_write_frame()
3078 		osst_wait_frame (STp, aSRpnt, STp->first_frame_position, -50, 60);  in osst_write_frame()
3103 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, SCSI_DATA_WRITE, STp->timeout,  in osst_write_frame()
3107 	*aSRpnt = SRpnt;  in osst_write_frame()
3121 				if (osst_write_error_recovery(STp, aSRpnt, 1))  in osst_write_frame()
3848 static int osst_int_ioctl(OS_Scsi_Tape * STp, Scsi_Request ** aSRpnt, unsigned int cmd_in, unsigned…  in osst_int_ioctl()  argument
3855 	Scsi_Request * SRpnt = * aSRpnt;  in osst_int_ioctl()
4254 	*aSRpnt = SRpnt;  in osst_int_ioctl()