183 static int osst_int_ioctl(struct osst_tape *STp, struct osst_request ** aSRpnt,
186 static int osst_set_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt, int frame,…
188 static int osst_get_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt);
190 static int osst_flush_write_buffer(struct osst_tape *STp, struct osst_request ** aSRpnt);
192 static int osst_write_error_recovery(struct osst_tape * STp, struct osst_request ** aSRpnt, int pen…
235 static int osst_chk_result(struct osst_tape * STp, struct osst_request * SRpnt)  in osst_chk_result()  argument
237 	char *name = tape_name(STp);  in osst_chk_result()
248 	cmdstatp = &STp->buffer->cmdstat;  in osst_chk_result()
252 		scode = STp->buffer->cmdstat.sense_hdr.sense_key;  in osst_chk_result()
296 	STp->pos_unknown |= STp->device->was_reset;  in osst_chk_result()
299 		STp->recover_count++;  in osst_chk_result()
300 		STp->recover_erreg++;  in osst_chk_result()
310 					     STp->recover_count);  in osst_chk_result()
324 	struct osst_tape *STp = SRpnt->stp;  in osst_end_async()  local
327 	STp->buffer->cmdstat.midlevel_result = SRpnt->result = req->errors;  in osst_end_async()
329 	STp->write_pending = 0;  in osst_end_async()
424 static	struct osst_request * osst_do_scsi(struct osst_request *SRpnt, struct osst_tape *STp,   in osst_do_scsi()  argument
436 	if (!do_wait && ((STp->buffer)->last_SRpnt)) {  in osst_do_scsi()
438 		       tape_name(STp));  in osst_do_scsi()
440 			(STp->buffer)->syscall_result = (-EINTR);  in osst_do_scsi()
442 			(STp->buffer)->syscall_result = (-EBUSY);  in osst_do_scsi()
450 				     tape_name(STp));  in osst_do_scsi()
452 				(STp->buffer)->syscall_result = (-EINTR);  in osst_do_scsi()
454 				(STp->buffer)->syscall_result = (-EBUSY);  in osst_do_scsi()
457 		SRpnt->stp = STp;  in osst_do_scsi()
463 		(STp->buffer)->last_SRpnt = SRpnt;  in osst_do_scsi()
465 	waiting = &STp->wait;  in osst_do_scsi()
469 	use_sg = (bytes > STp->buffer->sg[0].length) ? STp->buffer->use_sg : 0;  in osst_do_scsi()
471 		bp = (char *)&(STp->buffer->sg[0]);  in osst_do_scsi()
472 		if (STp->buffer->sg_segs < use_sg)  in osst_do_scsi()
473 			use_sg = STp->buffer->sg_segs;  in osst_do_scsi()
476 		bp = (STp->buffer)->b_data;  in osst_do_scsi()
479 	STp->buffer->cmdstat.have_sense = 0;  in osst_do_scsi()
480 	STp->buffer->syscall_result = 0;  in osst_do_scsi()
485 		(STp->buffer)->syscall_result = (-EBUSY);  in osst_do_scsi()
489 		STp->buffer->syscall_result = osst_chk_result(STp, SRpnt);  in osst_do_scsi()
491 		if (STp->buffer->syscall_result == 0 &&  in osst_do_scsi()
495 		      (STp->first_frame_position == 240   in osst_do_scsi()
498 			printk(OSST_DEB_MSG "%s:D: Injecting read error\n", tape_name(STp));  in osst_do_scsi()
499 			STp->buffer->last_result_fatal = 1;  in osst_do_scsi()
508 static void osst_write_behind_check(struct osst_tape *STp)  in osst_write_behind_check()  argument
512 	STbuffer = STp->buffer;  in osst_write_behind_check()
515 	if (STp->write_pending)  in osst_write_behind_check()
516 		STp->nbr_waits++;  in osst_write_behind_check()
518 		STp->nbr_finished++;  in osst_write_behind_check()
520 	wait_for_completion(&(STp->wait));  in osst_write_behind_check()
521 	STp->buffer->last_SRpnt->waiting = NULL;  in osst_write_behind_check()
523 	STp->buffer->syscall_result = osst_chk_result(STp, STp->buffer->last_SRpnt);  in osst_write_behind_check()
525 	if (STp->buffer->syscall_result)  in osst_write_behind_check()
526 		STp->buffer->syscall_result =  in osst_write_behind_check()
527 			osst_write_error_recovery(STp, &(STp->buffer->last_SRpnt), 1);  in osst_write_behind_check()
529 		STp->first_frame_position++;  in osst_write_behind_check()
531 	osst_release_request(STp->buffer->last_SRpnt);  in osst_write_behind_check()
549 static void osst_init_aux(struct osst_tape * STp, int frame_type, int frame_seq_number,  in osst_init_aux()  argument
552 	os_aux_t       *aux = STp->buffer->aux;  in osst_init_aux()
556 	if (STp->raw) return;  in osst_init_aux()
566 		aux->update_frame_cntr    = htonl(STp->update_frame_cntr);  in osst_init_aux()
576 		aux->next_mark_ppos       = htonl(STp->first_mark_ppos);  in osst_init_aux()
593 		par->wrt_pass_cntr        = htons(STp->wrt_pass_cntr);  in osst_init_aux()
594 		par->first_frame_ppos     = htonl(STp->first_data_ppos);  in osst_init_aux()
595 		par->last_frame_ppos      = htonl(STp->capacity);  in osst_init_aux()
602 	aux->filemark_cnt = htonl(STp->filemark_cnt);  in osst_init_aux()
604 	aux->last_mark_ppos = htonl(STp->last_mark_ppos);  in osst_init_aux()
605 	aux->last_mark_lbn  = htonl(STp->last_mark_lbn);  in osst_init_aux()
611 static int osst_verify_frame(struct osst_tape * STp, int frame_seq_number, int quiet)  in osst_verify_frame()  argument
613 	char               * name = tape_name(STp);  in osst_verify_frame()
614 	os_aux_t           * aux  = STp->buffer->aux;  in osst_verify_frame()
616 	struct st_partstat * STps = &(STp->ps[STp->partition]);  in osst_verify_frame()
619 	if (STp->raw) {  in osst_verify_frame()
620 		if (STp->buffer->syscall_result) {  in osst_verify_frame()
621 			for (i=0; i < STp->buffer->sg_segs; i++)  in osst_verify_frame()
622 				memset(page_address(sg_page(&STp->buffer->sg[i])),  in osst_verify_frame()
623 				       0, STp->buffer->sg[i].length);  in osst_verify_frame()
624 			strcpy(STp->buffer->b_data, "READ ERROR ON FRAME");  in osst_verify_frame()
626 			STp->buffer->buffer_bytes = OS_FRAME_SIZE;  in osst_verify_frame()
629 	if (STp->buffer->syscall_result) {  in osst_verify_frame()
641 	if (memcmp(aux->application_sig, STp->application_sig, 4) != 0 &&  in osst_verify_frame()
642 	    (memcmp(aux->application_sig, "LIN3", 4) != 0 || STp->linux_media_version != 4)) {  in osst_verify_frame()
649 		if (!STp->linux_media || STp->linux_media_version != 2) {  in osst_verify_frame()
663 	if (ntohs(par->wrt_pass_cntr) != STp->wrt_pass_cntr) {  in osst_verify_frame()
666 				    name, ntohs(par->wrt_pass_cntr), STp->wrt_pass_cntr);  in osst_verify_frame()
681 	    STp->first_frame_position < STp->eod_frame_ppos) {  in osst_verify_frame()
683 				 STp->first_frame_position);  in osst_verify_frame()
699 		if (STp->header_cache != NULL && i < OS_FM_TAB_MAX && (i > STp->filemark_cnt ||  in osst_verify_frame()
700 		    STp->first_frame_position - 1 != ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[i]))) {  in osst_verify_frame()
703 				  STp->header_cache->dat_fm_tab.fm_tab_ent[i] == 0?"Learned":"Corrected",  in osst_verify_frame()
704 				  i, STp->first_frame_position - 1);  in osst_verify_frame()
706 			STp->header_cache->dat_fm_tab.fm_tab_ent[i] = htonl(STp->first_frame_position - 1);  in osst_verify_frame()
707 			if (i >= STp->filemark_cnt)  in osst_verify_frame()
708 				 STp->filemark_cnt = i+1;  in osst_verify_frame()
713 		STp->frame_in_buffer = 1;  in osst_verify_frame()
718 		STp->buffer->buffer_bytes = blk_cnt * blk_sz;  in osst_verify_frame()
719 		STp->buffer->read_pointer = 0;  in osst_verify_frame()
720 		STp->frame_in_buffer = 1;  in osst_verify_frame()
723 		if (STp->block_size != blk_sz && blk_sz > 0) {  in osst_verify_frame()
727 				STp->block_size<1024?STp->block_size:STp->block_size/1024,  in osst_verify_frame()
728 				STp->block_size<1024?'b':'k');  in osst_verify_frame()
729 			STp->block_size            = blk_sz;  in osst_verify_frame()
730 			STp->buffer->buffer_blocks = OS_DATA_SIZE / blk_sz;  in osst_verify_frame()
734         STp->frame_seq_number = ntohl(aux->frame_seq_num);  in osst_verify_frame()
735 	STp->logical_blk_num  = ntohl(aux->logical_blk_num);  in osst_verify_frame()
739 	if (STp->read_error_frame == 0)  in osst_verify_frame()
740 		STp->read_error_frame = STp->first_frame_position - 1;  in osst_verify_frame()
747 static int osst_wait_ready(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_wait_ready()  argument
755 	char    	      * name = tape_name(STp);  in osst_wait_ready()
766 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1);  in osst_wait_ready()
770 	while ( STp->buffer->syscall_result && time_before(jiffies, startwait + timeout*HZ) &&  in osst_wait_ready()
787 	    SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1);  in osst_wait_ready()
793 	if ( STp->buffer->syscall_result &&  in osst_wait_ready()
794 	     osst_write_error_recovery(STp, aSRpnt, 0) ) {  in osst_wait_ready()
798 			STp->buffer->syscall_result, SRpnt->sense[0], SRpnt->sense[2],  in osst_wait_ready()
812 static int osst_wait_for_medium(struct osst_tape * STp, struct osst_request ** aSRpnt, unsigned tim…  in osst_wait_for_medium()  argument
819 	char    	      * name = tape_name(STp);  in osst_wait_for_medium()
827 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1);  in osst_wait_for_medium()
831 	while ( STp->buffer->syscall_result && time_before(jiffies, startwait + timeout*HZ) &&  in osst_wait_for_medium()
845 	    SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1);  in osst_wait_for_medium()
851 	if ( STp->buffer->syscall_result     && SRpnt->sense[2]  != 2 &&  in osst_wait_for_medium()
856 			STp->buffer->syscall_result, SRpnt->sense[0], SRpnt->sense[2],  in osst_wait_for_medium()
867 static int osst_position_tape_and_confirm(struct osst_tape * STp, struct osst_request ** aSRpnt, in…  in osst_position_tape_and_confirm()  argument
871 	osst_wait_ready(STp, aSRpnt, 15 * 60, 0);			/* TODO - can this catch a write error? */  in osst_position_tape_and_confirm()
872 	retval = osst_set_frame_position(STp, aSRpnt, frame, 0);  in osst_position_tape_and_confirm()
874 	osst_wait_ready(STp, aSRpnt, 15 * 60, OSST_WAIT_POSITION_COMPLETE);  in osst_position_tape_and_confirm()
875 	return (osst_get_frame_position(STp, aSRpnt));  in osst_position_tape_and_confirm()
881 static int osst_flush_drive_buffer(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_flush_drive_buffer()  argument
888 	char		      * name = tape_name(STp);  in osst_flush_drive_buffer()
897 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1);  in osst_flush_drive_buffer()
900 	if (STp->buffer->syscall_result) {  in osst_flush_drive_buffer()
906 			result = osst_write_error_recovery(STp, aSRpnt, 0);  in osst_flush_drive_buffer()
908 	result |= osst_wait_ready(STp, aSRpnt, 5 * 60, delay);  in osst_flush_drive_buffer()
909 	STp->ps[STp->partition].rw = OS_WRITING_COMPLETE;  in osst_flush_drive_buffer()
915 static int osst_wait_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int curr, int min…  in osst_wait_frame()  argument
918 	char	      * name      = tape_name(STp);  in osst_wait_frame()
922 	if (minlast >= 0 && STp->ps[STp->partition].rw != ST_READING)  in osst_wait_frame()
928 		result = osst_get_frame_position(STp, aSRpnt);  in osst_wait_frame()
930 			if ((result = osst_write_error_recovery(STp, aSRpnt, 0)) == 0)  in osst_wait_frame()
933 		if (STp->first_frame_position == curr &&  in osst_wait_frame()
935 		      (signed)STp->last_frame_position > (signed)curr + minlast) ||  in osst_wait_frame()
936 		     (minlast >= 0 && STp->cur_frames > minlast)  in osst_wait_frame()
943 					name, curr, curr+minlast, STp->first_frame_position,  in osst_wait_frame()
944 					STp->last_frame_position, STp->cur_frames,  in osst_wait_frame()
954 				name, curr, curr+minlast, STp->first_frame_position,  in osst_wait_frame()
955 				STp->last_frame_position, STp->cur_frames, result);  in osst_wait_frame()
963 		name, curr, curr+minlast, STp->first_frame_position,  in osst_wait_frame()
964 		STp->last_frame_position, STp->cur_frames,  in osst_wait_frame()
970 static int osst_recover_wait_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int writi…  in osst_recover_wait_frame()  argument
976         char		      * name      = tape_name(STp);  in osst_recover_wait_frame()
980 		char  * olddata = STp->buffer->b_data;  in osst_recover_wait_frame()
981 		int	oldsize = STp->buffer->buffer_size;  in osst_recover_wait_frame()
988 		SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout,  in osst_recover_wait_frame()
993 			if (STp->buffer->syscall_result && (SRpnt->sense[2] & 0x0f) != 2) {  in osst_recover_wait_frame()
996 				retval = osst_write_error_recovery(STp, aSRpnt, 0);  in osst_recover_wait_frame()
1001 			STp->buffer->b_data = mybuf; STp->buffer->buffer_size = 24;  in osst_recover_wait_frame()
1005 			SRpnt = osst_do_scsi(SRpnt, STp, cmd, 20, DMA_FROM_DEVICE, STp->timeout,  in osst_recover_wait_frame()
1008 			retval = ( STp->buffer->syscall_result || (STp->buffer)->b_data[15] > 25 );  in osst_recover_wait_frame()
1009 			STp->buffer->b_data = olddata; STp->buffer->buffer_size = oldsize;  in osst_recover_wait_frame()
1015 		if (STp->buffer->syscall_result)  in osst_recover_wait_frame()
1028 static int osst_read_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int timeout)  in osst_read_frame()  argument
1034 	os_aux_t	      * aux    = STp->buffer->aux;  in osst_read_frame()
1035 	char		      * name   = tape_name(STp);  in osst_read_frame()
1038 	if (STp->poll)  in osst_read_frame()
1039 		if (osst_wait_frame (STp, aSRpnt, STp->first_frame_position, 0, timeout))  in osst_read_frame()
1040 			retval = osst_recover_wait_frame(STp, aSRpnt, 0);  in osst_read_frame()
1051 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, DMA_FROM_DEVICE,  in osst_read_frame()
1052 				      STp->timeout, MAX_RETRIES, 1);  in osst_read_frame()
1057 	if ((STp->buffer)->syscall_result) {  in osst_read_frame()
1059 	    if (STp->read_error_frame == 0) {  in osst_read_frame()
1060 		STp->read_error_frame = STp->first_frame_position;  in osst_read_frame()
1062 		printk(OSST_DEB_MSG "%s:D: Recording read error at %d\n", name, STp->read_error_frame);  in osst_read_frame()
1076 	    STp->first_frame_position++;  in osst_read_frame()
1099 static int osst_initiate_read(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_initiate_read()  argument
1101 	struct st_partstat    * STps   = &(STp->ps[STp->partition]);  in osst_initiate_read()
1105 	char		      * name   = tape_name(STp);  in osst_initiate_read()
1108 		if (STps->rw == ST_WRITING || STp->dirty) {  in osst_initiate_read()
1109 			STp->write_type = OS_WRITE_DATA;  in osst_initiate_read()
1110                         osst_flush_write_buffer(STp, aSRpnt);  in osst_initiate_read()
1111 			osst_flush_drive_buffer(STp, aSRpnt);  in osst_initiate_read()
1114 		STp->frame_in_buffer = 0;  in osst_initiate_read()
1127 		SRpnt   = osst_do_scsi(*aSRpnt, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1);  in osst_initiate_read()
1129 		if ((retval = STp->buffer->syscall_result))  in osst_initiate_read()
1136 static int osst_get_logical_frame(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_get_logical_frame()  argument
1139 	struct st_partstat * STps  = &(STp->ps[STp->partition]);  in osst_get_logical_frame()
1140 	char		   * name  = tape_name(STp);  in osst_get_logical_frame()
1150 	if (frame_seq_number == -1 && STp->frame_in_buffer) {  in osst_get_logical_frame()
1152 		printk(OSST_DEB_MSG "%s:D: Frame %d still in buffer\n", name, STp->frame_seq_number);  in osst_get_logical_frame()
1163 			if (STp->read_error_frame) {  in osst_get_logical_frame()
1164 				osst_set_frame_position(STp, aSRpnt, STp->read_error_frame, 0);  in osst_get_logical_frame()
1167 						    name, STp->read_error_frame);  in osst_get_logical_frame()
1169 				STp->read_error_frame = 0;  in osst_get_logical_frame()
1170 				STp->abort_count++;  in osst_get_logical_frame()
1179 		if ( osst_initiate_read(STp, aSRpnt)  in osst_get_logical_frame()
1180                 || ( (!STp->frame_in_buffer) && osst_read_frame(STp, aSRpnt, 30) ) ) {  in osst_get_logical_frame()
1181 			if (STp->raw)  in osst_get_logical_frame()
1183 			position = osst_get_frame_position(STp, aSRpnt);  in osst_get_logical_frame()
1186 			else if (position > STp->eod_frame_ppos || ++bad == 10) {  in osst_get_logical_frame()
1187 				position = STp->read_error_frame - 1;  in osst_get_logical_frame()
1198 			osst_set_frame_position(STp, aSRpnt, position, 0);  in osst_get_logical_frame()
1201 		if (osst_verify_frame(STp, frame_seq_number, quiet))  in osst_get_logical_frame()
1203 		if (osst_verify_frame(STp, -1, quiet)) {  in osst_get_logical_frame()
1204 			x = ntohl(STp->buffer->aux->frame_seq_num);  in osst_get_logical_frame()
1205 			if (STp->fast_open) {  in osst_get_logical_frame()
1209 				STp->header_ok = 0;  in osst_get_logical_frame()
1210 				STp->read_error_frame = 0;  in osst_get_logical_frame()
1216 					position = STp->read_error_frame - 1;  in osst_get_logical_frame()
1219 			        	position = osst_get_frame_position(STp, aSRpnt)  in osst_get_logical_frame()
1222 					if (STp->first_frame_position >= 3000 && position < 3000)  in osst_get_logical_frame()
1229 					       	STp->first_frame_position - position);  in osst_get_logical_frame()
1231                         	osst_set_frame_position(STp, aSRpnt, position, 0);  in osst_get_logical_frame()
1237 		if (osst_get_frame_position(STp, aSRpnt) == 0xbaf) {  in osst_get_logical_frame()
1241 			osst_set_frame_position(STp, aSRpnt, 0xbb8, 0);  in osst_get_logical_frame()
1244 		STp->frame_in_buffer = 0;  in osst_get_logical_frame()
1247 		STp->recover_count++;  in osst_get_logical_frame()
1248 		STp->recover_erreg++;  in osst_get_logical_frame()
1250 					name, STp->read_error_frame);  in osst_get_logical_frame()
1252 	STp->read_count++;  in osst_get_logical_frame()
1258 			name, frame_seq_number, STp->frame_seq_number, STps->eof);  in osst_get_logical_frame()
1260 	STp->fast_open = 0;  in osst_get_logical_frame()
1261 	STp->read_error_frame = 0;  in osst_get_logical_frame()
1265 static int osst_seek_logical_blk(struct osst_tape * STp, struct osst_request ** aSRpnt, int logical…  in osst_seek_logical_blk()  argument
1267         struct st_partstat * STps = &(STp->ps[STp->partition]);  in osst_seek_logical_blk()
1268 	char		   * name = tape_name(STp);  in osst_seek_logical_blk()
1275 				name, logical_blk_num, STp->logical_blk_num,   in osst_seek_logical_blk()
1276 				STp->block_size<1024?STp->block_size:STp->block_size/1024,  in osst_seek_logical_blk()
1277 				STp->block_size<1024?'b':'k');  in osst_seek_logical_blk()
1281 		move                = logical_blk_num - STp->logical_blk_num;  in osst_seek_logical_blk()
1282 		if (move < 0) move -= (OS_DATA_SIZE / STp->block_size) - 1;  in osst_seek_logical_blk()
1283 		move               /= (OS_DATA_SIZE / STp->block_size);  in osst_seek_logical_blk()
1284 		frame_seq_estimate  = STp->frame_seq_number + move;  in osst_seek_logical_blk()
1286 		frame_seq_estimate  = logical_blk_num * STp->block_size / OS_DATA_SIZE;  in osst_seek_logical_blk()
1291 	   if (ppos_estimate > STp->eod_frame_ppos-2) {  in osst_seek_logical_blk()
1292 	       frame_seq_estimate += STp->eod_frame_ppos - 2 - ppos_estimate;  in osst_seek_logical_blk()
1293 	       ppos_estimate       = STp->eod_frame_ppos - 2;  in osst_seek_logical_blk()
1299 	   osst_set_frame_position(STp, aSRpnt, ppos_estimate, 0);  in osst_seek_logical_blk()
1300 	   if (osst_get_logical_frame(STp, aSRpnt, frame_seq_estimate, 1) >= 0) {  in osst_seek_logical_blk()
1302 	      if (logical_blk_num <  STp->logical_blk_num ||  in osst_seek_logical_blk()
1303 …      logical_blk_num >= STp->logical_blk_num + ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt)) {  in osst_seek_logical_blk()
1305 		    move = logical_blk_num < STp->logical_blk_num? -2 : 1;  in osst_seek_logical_blk()
1307 		    move                = logical_blk_num - STp->logical_blk_num;  in osst_seek_logical_blk()
1308 		    if (move < 0) move -= (OS_DATA_SIZE / STp->block_size) - 1;  in osst_seek_logical_blk()
1309 		    move               /= (OS_DATA_SIZE / STp->block_size);  in osst_seek_logical_blk()
1311 		 if (!move) move = logical_blk_num > STp->logical_blk_num ? 1 : -1;  in osst_seek_logical_blk()
1315 				name, retries, ppos_estimate, STp->frame_seq_number, frame_seq_estimate,   in osst_seek_logical_blk()
1316 				STp->logical_blk_num, logical_blk_num, move);  in osst_seek_logical_blk()
1322 		 STp->buffer->read_pointer  = (logical_blk_num - STp->logical_blk_num) * STp->block_size;  in osst_seek_logical_blk()
1323 		 STp->buffer->buffer_bytes -= STp->buffer->read_pointer;  in osst_seek_logical_blk()
1324 		 STp->logical_blk_num       =  logical_blk_num;  in osst_seek_logical_blk()
1328 				name, ppos_estimate, STp->frame_seq_number, STp->frame_in_buffer,   in osst_seek_logical_blk()
1329 				STp->buffer->buffer_bytes, STp->buffer->read_pointer / STp->block_size,   in osst_seek_logical_blk()
1330 				STp->block_size);  in osst_seek_logical_blk()
1332 		 STps->drv_file = ntohl(STp->buffer->aux->filemark_cnt);  in osst_seek_logical_blk()
1337 		     STps->drv_block = ntohl(STp->buffer->aux->last_mark_lbn)?  in osst_seek_logical_blk()
1338 					  STp->logical_blk_num -  in osst_seek_logical_blk()
1339 					     (STps->drv_file ? ntohl(STp->buffer->aux->last_mark_lbn) + 1 : 0):  in osst_seek_logical_blk()
1342 		 STps->eof = (STp->first_frame_position >= STp->eod_frame_ppos)?ST_EOD:ST_NOEOF;  in osst_seek_logical_blk()
1346 	   if (osst_get_logical_frame(STp, aSRpnt, -1, 1) < 0)  in osst_seek_logical_blk()
1351 			   name, retries, ppos_estimate, STp->frame_seq_number, frame_seq_estimate,   in osst_seek_logical_blk()
1352 			   STp->logical_blk_num, logical_blk_num);  in osst_seek_logical_blk()
1354 	   if (frame_seq_estimate != STp->frame_seq_number)  in osst_seek_logical_blk()
1355 	      ppos_estimate += frame_seq_estimate - STp->frame_seq_number;  in osst_seek_logical_blk()
1361 			    name, logical_blk_num, STp->logical_blk_num, retries);  in osst_seek_logical_blk()
1374 static int osst_get_sector(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_get_sector()  argument
1378 	char  * name = tape_name(STp);  in osst_get_sector()
1382 		name, STp->first_frame_position, STp->frame_seq_number, STp->logical_blk_num,  in osst_get_sector()
1383 		STp->ps[STp->partition].drv_file, STp->ps[STp->partition].drv_block,   in osst_get_sector()
1384 		STp->ps[STp->partition].rw == ST_WRITING?'w':'r',  in osst_get_sector()
1385 		STp->ps[STp->partition].rw == ST_WRITING?STp->buffer->buffer_bytes:  in osst_get_sector()
1386 		STp->buffer->read_pointer, STp->ps[STp->partition].eof);  in osst_get_sector()
1389 	if (STp->ps[STp->partition].drv_block >= 0) {  in osst_get_sector()
1390 		sector = (STp->frame_in_buffer ? STp->first_frame_position-1 :  in osst_get_sector()
1391 				STp->first_frame_position) << OSST_FRAME_SHIFT;  in osst_get_sector()
1392 		if (STp->ps[STp->partition].rw == ST_WRITING)  in osst_get_sector()
1393 		       	sector |= (STp->buffer->buffer_bytes >> OSST_SECTOR_SHIFT) & OSST_SECTOR_MASK;  in osst_get_sector()
1395 	       		sector |= (STp->buffer->read_pointer >> OSST_SECTOR_SHIFT) & OSST_SECTOR_MASK;  in osst_get_sector()
1397 		sector = osst_get_frame_position(STp, aSRpnt);  in osst_get_sector()
1404 static int osst_seek_sector(struct osst_tape * STp, struct osst_request ** aSRpnt, int sector)  in osst_seek_sector()  argument
1406         struct st_partstat * STps   = &(STp->ps[STp->partition]);  in osst_seek_sector()
1411 	char          * name = tape_name(STp);  in osst_seek_sector()
1416 	if (frame < 0 || frame >= STp->capacity) return (-ENXIO);  in osst_seek_sector()
1418 	if (frame <= STp->first_data_ppos) {  in osst_seek_sector()
1419 		STp->frame_seq_number = STp->logical_blk_num = STps->drv_file = STps->drv_block = 0;  in osst_seek_sector()
1420 		return (osst_set_frame_position(STp, aSRpnt, frame, 0));  in osst_seek_sector()
1422 	r = osst_set_frame_position(STp, aSRpnt, offset?frame:frame-1, 0);  in osst_seek_sector()
1425 	r = osst_get_logical_frame(STp, aSRpnt, -1, 1);  in osst_seek_sector()
1428 	if (osst_get_frame_position(STp, aSRpnt) != (offset?frame+1:frame)) return (-EIO);  in osst_seek_sector()
1431 		STp->logical_blk_num      += offset / STp->block_size;  in osst_seek_sector()
1432 		STp->buffer->read_pointer  = offset;  in osst_seek_sector()
1433 		STp->buffer->buffer_bytes -= offset;  in osst_seek_sector()
1435 		STp->frame_seq_number++;  in osst_seek_sector()
1436 		STp->frame_in_buffer       = 0;  in osst_seek_sector()
1437 		STp->logical_blk_num      += ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt);  in osst_seek_sector()
1438 		STp->buffer->buffer_bytes  = STp->buffer->read_pointer = 0;  in osst_seek_sector()
1440 	STps->drv_file = ntohl(STp->buffer->aux->filemark_cnt);  in osst_seek_sector()
1445 		STps->drv_block = ntohl(STp->buffer->aux->last_mark_lbn)?  in osst_seek_sector()
1446 				    STp->logical_blk_num -  in osst_seek_sector()
1447 					(STps->drv_file ? ntohl(STp->buffer->aux->last_mark_lbn) + 1 : 0):  in osst_seek_sector()
1450 	STps->eof       = (STp->first_frame_position >= STp->eod_frame_ppos)?ST_EOD:ST_NOEOF;  in osst_seek_sector()
1454 		name, STp->first_frame_position, STp->frame_seq_number, STp->logical_blk_num,  in osst_seek_sector()
1455 		STps->drv_file, STps->drv_block, STp->buffer->read_pointer, STps->eof);  in osst_seek_sector()
1467 static int osst_read_back_buffer_and_rewrite(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_read_back_buffer_and_rewrite()  argument
1474 	int			nframes          = STp->cur_frames;  in osst_read_back_buffer_and_rewrite()
1475 	int			blks_per_frame   = ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt);  in osst_read_back_buffer_and_rewrite()
1476 	int			frame_seq_number = ntohl(STp->buffer->aux->frame_seq_num)  in osst_read_back_buffer_and_rewrite()
1478 	int			logical_blk_num  = ntohl(STp->buffer->aux->logical_blk_num)   in osst_read_back_buffer_and_rewrite()
1480 	char		      * name             = tape_name(STp);  in osst_read_back_buffer_and_rewrite()
1492 	osst_copy_from_buffer(STp->buffer, (p = &buffer[nframes * OS_DATA_SIZE]));  in osst_read_back_buffer_and_rewrite()
1508 		SRpnt = osst_do_scsi(SRpnt, STp, cmd, OS_FRAME_SIZE, DMA_FROM_DEVICE,  in osst_read_back_buffer_and_rewrite()
1509 					    STp->timeout, MAX_RETRIES, 1);  in osst_read_back_buffer_and_rewrite()
1511 		if ((STp->buffer)->syscall_result || !SRpnt) {  in osst_read_back_buffer_and_rewrite()
1517 		osst_copy_from_buffer(STp->buffer, p);  in osst_read_back_buffer_and_rewrite()
1525 	osst_get_frame_position(STp, aSRpnt);  in osst_read_back_buffer_and_rewrite()
1528 	printk(OSST_DEB_MSG "%s:D: Frames left in buffer: %d\n", name, STp->cur_frames);  in osst_read_back_buffer_and_rewrite()
1536 			if (STp->write_type == OS_WRITE_HEADER) {  in osst_read_back_buffer_and_rewrite()
1548 			osst_set_frame_position(STp, aSRpnt, new_frame + i, 0);  in osst_read_back_buffer_and_rewrite()
1549 			osst_wait_ready(STp, aSRpnt, 60, OSST_WAIT_POSITION_COMPLETE);  in osst_read_back_buffer_and_rewrite()
1550 			osst_get_frame_position(STp, aSRpnt);  in osst_read_back_buffer_and_rewrite()
1561 		osst_copy_to_buffer(STp->buffer, p);  in osst_read_back_buffer_and_rewrite()
1565 		osst_init_aux(STp, STp->buffer->aux->frame_type, frame_seq_number+i,  in osst_read_back_buffer_and_rewrite()
1567 			       	ntohl(STp->buffer->aux->dat.dat_list[0].blk_sz), blks_per_frame);  in osst_read_back_buffer_and_rewrite()
1580 		SRpnt = osst_do_scsi(SRpnt, STp, cmd, OS_FRAME_SIZE, DMA_TO_DEVICE,  in osst_read_back_buffer_and_rewrite()
1581 					    STp->timeout, MAX_RETRIES, 1);  in osst_read_back_buffer_and_rewrite()
1583 		if (STp->buffer->syscall_result)  in osst_read_back_buffer_and_rewrite()
1596 				SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE,  in osst_read_back_buffer_and_rewrite()
1597 							    STp->timeout, MAX_RETRIES, 1);  in osst_read_back_buffer_and_rewrite()
1605 				flag = STp->buffer->syscall_result;  in osst_read_back_buffer_and_rewrite()
1611 					SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, STp->timeout,  in osst_read_back_buffer_and_rewrite()
1620 					if (STp->buffer->syscall_result)  in osst_read_back_buffer_and_rewrite()
1647 			osst_get_frame_position(STp, aSRpnt);  in osst_read_back_buffer_and_rewrite()
1650 					  name, STp->first_frame_position, STp->last_frame_position, STp->cur_frames);  in osst_read_back_buffer_and_rewrite()
1657 				STp->write_type == OS_WRITE_HEADER?"header":"body");  in osst_read_back_buffer_and_rewrite()
1660 		osst_copy_to_buffer(STp->buffer, p);	/* so buffer content == at entry in all cases */  in osst_read_back_buffer_and_rewrite()
1665 static int osst_reposition_and_retry(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_reposition_and_retry()  argument
1670 	char		      * name      = tape_name(STp);  in osst_reposition_and_retry()
1684 			if (frame < 2990 && frame+skip+STp->cur_frames+pending >= 2990)  in osst_reposition_and_retry()
1686 			expected = frame+skip+STp->cur_frames+pending;  in osst_reposition_and_retry()
1689 					  name, frame+skip, STp->frame_seq_number-STp->cur_frames-pending);  in osst_reposition_and_retry()
1691 			osst_set_frame_position(STp, aSRpnt, frame + skip, 1);  in osst_reposition_and_retry()
1696 		if (osst_get_frame_position(STp, aSRpnt) < 0) {		/* additional write error */  in osst_reposition_and_retry()
1699 					  name, STp->first_frame_position,  in osst_reposition_and_retry()
1700 					  STp->last_frame_position, STp->cur_frames);  in osst_reposition_and_retry()
1702 			frame = STp->last_frame_position;  in osst_reposition_and_retry()
1706 		if (pending && STp->cur_frames < 50) {  in osst_reposition_and_retry()
1714 					  name, STp->frame_seq_number-1, STp->first_frame_position);  in osst_reposition_and_retry()
1716 			SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, DMA_TO_DEVICE,  in osst_reposition_and_retry()
1717 						      STp->timeout, MAX_RETRIES, 1);  in osst_reposition_and_retry()
1720 			if (STp->buffer->syscall_result) {		/* additional write error */  in osst_reposition_and_retry()
1736 		if (STp->cur_frames == 0) {  in osst_reposition_and_retry()
1741 			if (STp->first_frame_position != expected) {  in osst_reposition_and_retry()
1743 						name, STp->first_frame_position, expected);  in osst_reposition_and_retry()
1768 static int osst_write_error_recovery(struct osst_tape * STp, struct osst_request ** aSRpnt, int pen…  in osst_write_error_recovery()  argument
1771 	struct st_partstat  * STps   = & STp->ps[STp->partition];  in osst_write_error_recovery()
1772 	char		    * name   = tape_name(STp);  in osst_write_error_recovery()
1797 	osst_get_frame_position(STp, aSRpnt);  in osst_write_error_recovery()
1800 			name, STp->first_frame_position, STp->last_frame_position);  in osst_write_error_recovery()
1802 	switch (STp->write_type) {  in osst_write_error_recovery()
1808 			name, STp->cur_frames, frame, (frame + skip > 3000 && frame < 3000)?3000:frame + skip);  in osst_write_error_recovery()
1809 		if (STp->os_fw_rev >= 10600)  in osst_write_error_recovery()
1810 			retval = osst_reposition_and_retry(STp, aSRpnt, frame, skip, pending);  in osst_write_error_recovery()
1812 			retval = osst_read_back_buffer_and_rewrite(STp, aSRpnt, frame, skip, pending);  in osst_write_error_recovery()
1820 		osst_set_frame_position(STp, aSRpnt, frame + STp->cur_frames + pending, 0);  in osst_write_error_recovery()
1825 		retval = osst_read_back_buffer_and_rewrite(STp, aSRpnt, frame, 1, pending);  in osst_write_error_recovery()
1829 		osst_set_frame_position(STp, aSRpnt, frame + STp->cur_frames + pending, 0);  in osst_write_error_recovery()
1831 	osst_get_frame_position(STp, aSRpnt);  in osst_write_error_recovery()
1834 			name, STp->cur_frames, STp->first_frame_position, STp->last_frame_position);  in osst_write_error_recovery()
1835 	printk(OSST_DEB_MSG "%s:D: next logical frame to write: %d\n", name, STp->logical_blk_num);  in osst_write_error_recovery()
1838 		STp->recover_count++;  in osst_write_error_recovery()
1839 		STp->recover_erreg++;  in osst_write_error_recovery()
1841 		STp->abort_count++;  in osst_write_error_recovery()
1847 static int osst_space_over_filemarks_backward(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_space_over_filemarks_backward()  argument
1850 	char  * name = tape_name(STp);  in osst_space_over_filemarks_backward()
1857 	if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_backward()
1863 	if (STp->linux_media_version >= 4) {  in osst_space_over_filemarks_backward()
1867 		cnt = ntohl(STp->buffer->aux->filemark_cnt);  in osst_space_over_filemarks_backward()
1868 		if (STp->header_ok                         &&   in osst_space_over_filemarks_backward()
1869 		    STp->header_cache != NULL              &&  in osst_space_over_filemarks_backward()
1872 		    (cnt - mt_count)   < STp->filemark_cnt &&  in osst_space_over_filemarks_backward()
1873 		    STp->header_cache->dat_fm_tab.fm_tab_ent[cnt-1] == STp->buffer->aux->last_mark_ppos)  in osst_space_over_filemarks_backward()
1875 			last_mark_ppos = ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[cnt - mt_count]);  in osst_space_over_filemarks_backward()
1877 		if (STp->header_cache == NULL || (cnt - mt_count) < 0 || (cnt - mt_count) >= OS_FM_TAB_MAX)  in osst_space_over_filemarks_backward()
1879 			       STp->header_cache == NULL?"lack of header cache":"count out of range");  in osst_space_over_filemarks_backward()
1883 				((cnt == -1 && ntohl(STp->buffer->aux->last_mark_ppos) == -1) ||  in osst_space_over_filemarks_backward()
1884 				 (STp->header_cache->dat_fm_tab.fm_tab_ent[cnt-1] ==  in osst_space_over_filemarks_backward()
1885 					 STp->buffer->aux->last_mark_ppos))?"match":"error",  in osst_space_over_filemarks_backward()
1888 		if (last_mark_ppos > 10 && last_mark_ppos < STp->eod_frame_ppos) {  in osst_space_over_filemarks_backward()
1889 			osst_position_tape_and_confirm(STp, aSRpnt, last_mark_ppos);  in osst_space_over_filemarks_backward()
1890 			if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_backward()
1897 			if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) {  in osst_space_over_filemarks_backward()
1910 		last_mark_ppos = ntohl(STp->buffer->aux->last_mark_ppos);  in osst_space_over_filemarks_backward()
1916 		osst_position_tape_and_confirm(STp, aSRpnt, last_mark_ppos);  in osst_space_over_filemarks_backward()
1918 		if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_backward()
1924 		if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) {  in osst_space_over_filemarks_backward()
1932 		STp->frame_seq_number++;  in osst_space_over_filemarks_backward()
1933 		STp->frame_in_buffer      = 0;  in osst_space_over_filemarks_backward()
1934 		STp->buffer->buffer_bytes = 0;  in osst_space_over_filemarks_backward()
1935 		STp->buffer->read_pointer = 0;  in osst_space_over_filemarks_backward()
1936 		STp->logical_blk_num     += ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt);  in osst_space_over_filemarks_backward()
1946 static int osst_space_over_filemarks_forward_slow(struct osst_tape * STp, struct osst_request ** aS…  in osst_space_over_filemarks_forward_slow()  argument
1951 	char  * name = tape_name(STp);  in osst_space_over_filemarks_forward_slow()
1955 	if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_slow()
1962 		if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_slow()
1968 		if (STp->buffer->aux->frame_type == OS_FRAME_TYPE_MARKER)  in osst_space_over_filemarks_forward_slow()
1970 		if (STp->buffer->aux->frame_type == OS_FRAME_TYPE_EOD) {  in osst_space_over_filemarks_forward_slow()
1974 			if (STp->first_frame_position > STp->eod_frame_ppos+1) {  in osst_space_over_filemarks_forward_slow()
1977 					       	name, STp->eod_frame_ppos, STp->first_frame_position-1);  in osst_space_over_filemarks_forward_slow()
1979 				STp->eod_frame_ppos = STp->first_frame_position-1;  in osst_space_over_filemarks_forward_slow()
1985 		STp->frame_in_buffer = 0;  in osst_space_over_filemarks_forward_slow()
1988 		STp->frame_seq_number++;  in osst_space_over_filemarks_forward_slow()
1989 		STp->frame_in_buffer      = 0;  in osst_space_over_filemarks_forward_slow()
1990 		STp->buffer->buffer_bytes = 0;  in osst_space_over_filemarks_forward_slow()
1991 		STp->buffer->read_pointer = 0;  in osst_space_over_filemarks_forward_slow()
1992 		STp->logical_blk_num     += ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt);  in osst_space_over_filemarks_forward_slow()
2000 static int osst_space_over_filemarks_forward_fast(struct osst_tape * STp, struct osst_request ** aS…  in osst_space_over_filemarks_forward_fast()  argument
2003 	char  * name = tape_name(STp);  in osst_space_over_filemarks_forward_fast()
2010 	if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_fast()
2017 	if (STp->linux_media_version >= 4) {  in osst_space_over_filemarks_forward_fast()
2021 		cnt = ntohl(STp->buffer->aux->filemark_cnt) - 1;  in osst_space_over_filemarks_forward_fast()
2022 		if (STp->header_ok                         &&   in osst_space_over_filemarks_forward_fast()
2023 		    STp->header_cache != NULL              &&  in osst_space_over_filemarks_forward_fast()
2025 		    (cnt + mt_count)   < STp->filemark_cnt &&  in osst_space_over_filemarks_forward_fast()
2026 		    ((cnt == -1 && ntohl(STp->buffer->aux->last_mark_ppos) == -1) ||  in osst_space_over_filemarks_forward_fast()
2027 		     (STp->header_cache->dat_fm_tab.fm_tab_ent[cnt] == STp->buffer->aux->last_mark_ppos)))  in osst_space_over_filemarks_forward_fast()
2029 			next_mark_ppos = ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[cnt + mt_count]);  in osst_space_over_filemarks_forward_fast()
2031 		if (STp->header_cache == NULL || (cnt + mt_count) >= OS_FM_TAB_MAX)  in osst_space_over_filemarks_forward_fast()
2033 			       STp->header_cache == NULL?"lack of header cache":"count out of range");  in osst_space_over_filemarks_forward_fast()
2037 			       ((cnt == -1 && ntohl(STp->buffer->aux->last_mark_ppos) == -1) ||  in osst_space_over_filemarks_forward_fast()
2038 				(STp->header_cache->dat_fm_tab.fm_tab_ent[cnt] ==  in osst_space_over_filemarks_forward_fast()
2039 					 STp->buffer->aux->last_mark_ppos))?"match":"error",  in osst_space_over_filemarks_forward_fast()
2042 		if (next_mark_ppos <= 10 || next_mark_ppos > STp->eod_frame_ppos) {  in osst_space_over_filemarks_forward_fast()
2046 			return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count);  in osst_space_over_filemarks_forward_fast()
2048 			osst_position_tape_and_confirm(STp, aSRpnt, next_mark_ppos);  in osst_space_over_filemarks_forward_fast()
2049 			if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_fast()
2056 			if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) {  in osst_space_over_filemarks_forward_fast()
2061 			if (ntohl(STp->buffer->aux->filemark_cnt) != cnt + mt_count) {  in osst_space_over_filemarks_forward_fast()
2064 						 ntohl(STp->buffer->aux->filemark_cnt));  in osst_space_over_filemarks_forward_fast()
2073 			if (STp->buffer->aux->frame_type == OS_FRAME_TYPE_MARKER)  in osst_space_over_filemarks_forward_fast()
2075 			if (STp->buffer->aux->frame_type == OS_FRAME_TYPE_EOD) {  in osst_space_over_filemarks_forward_fast()
2081 			if (ntohl(STp->buffer->aux->filemark_cnt) == 0) {  in osst_space_over_filemarks_forward_fast()
2082 				if (STp->first_mark_ppos == -1) {  in osst_space_over_filemarks_forward_fast()
2086 					return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count);  in osst_space_over_filemarks_forward_fast()
2088 				osst_position_tape_and_confirm(STp, aSRpnt, STp->first_mark_ppos);  in osst_space_over_filemarks_forward_fast()
2089 				if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_fast()
2097 				if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) {  in osst_space_over_filemarks_forward_fast()
2099 							 name, STp->first_mark_ppos);  in osst_space_over_filemarks_forward_fast()
2103 				if (osst_space_over_filemarks_backward(STp, aSRpnt, MTBSF, 1) < 0)  in osst_space_over_filemarks_forward_fast()
2110 			next_mark_ppos = ntohl(STp->buffer->aux->next_mark_ppos);  in osst_space_over_filemarks_forward_fast()
2111 			if (!next_mark_ppos || next_mark_ppos > STp->eod_frame_ppos) {  in osst_space_over_filemarks_forward_fast()
2115 				return osst_space_over_filemarks_forward_slow(STp, aSRpnt, mt_op, mt_count - cnt);  in osst_space_over_filemarks_forward_fast()
2120 			osst_position_tape_and_confirm(STp, aSRpnt, next_mark_ppos);  in osst_space_over_filemarks_forward_fast()
2122 			if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_space_over_filemarks_forward_fast()
2129 			if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_MARKER) {  in osst_space_over_filemarks_forward_fast()
2137 		STp->frame_seq_number++;  in osst_space_over_filemarks_forward_fast()
2138 		STp->frame_in_buffer      = 0;  in osst_space_over_filemarks_forward_fast()
2139 		STp->buffer->buffer_bytes = 0;  in osst_space_over_filemarks_forward_fast()
2140 		STp->buffer->read_pointer = 0;  in osst_space_over_filemarks_forward_fast()
2141 		STp->logical_blk_num     += ntohs(STp->buffer->aux->dat.dat_list[0].blk_cnt);  in osst_space_over_filemarks_forward_fast()
2151 static void osst_set_retries(struct osst_tape * STp, struct osst_request ** aSRpnt, int retries)  in osst_set_retries()  argument
2155 	char		      * name   = tape_name(STp);  in osst_set_retries()
2162 	(STp->buffer)->b_data[0] = cmd[4] - 1;  in osst_set_retries()
2163 	(STp->buffer)->b_data[1] = 0;			/* Medium Type - ignoring */  in osst_set_retries()
2164 	(STp->buffer)->b_data[2] = 0;			/* Reserved */  in osst_set_retries()
2165 	(STp->buffer)->b_data[3] = 0;			/* Block Descriptor Length */  in osst_set_retries()
2166 	(STp->buffer)->b_data[MODE_HEADER_LENGTH + 0] = NUMBER_RETRIES_PAGE | (1 << 7);  in osst_set_retries()
2167 	(STp->buffer)->b_data[MODE_HEADER_LENGTH + 1] = 2;  in osst_set_retries()
2168 	(STp->buffer)->b_data[MODE_HEADER_LENGTH + 2] = 4;  in osst_set_retries()
2169 	(STp->buffer)->b_data[MODE_HEADER_LENGTH + 3] = retries;  in osst_set_retries()
2174 	SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_TO_DEVICE, STp->timeout, 0, 1);  in osst_set_retries()
2177 	if ((STp->buffer)->syscall_result)  in osst_set_retries()
2183 static int osst_write_filemark(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_write_filemark()  argument
2186 	int	this_mark_ppos = STp->first_frame_position;  in osst_write_filemark()
2187 	int	this_mark_lbn  = STp->logical_blk_num;  in osst_write_filemark()
2189 	char  * name = tape_name(STp);  in osst_write_filemark()
2192 	if (STp->raw) return 0;  in osst_write_filemark()
2194 	STp->write_type = OS_WRITE_NEW_MARK;  in osst_write_filemark()
2197 	       name, STp->filemark_cnt, this_mark_ppos, STp->frame_seq_number, this_mark_lbn);  in osst_write_filemark()
2199 	STp->dirty = 1;  in osst_write_filemark()
2200 	result  = osst_flush_write_buffer(STp, aSRpnt);  in osst_write_filemark()
2201 	result |= osst_flush_drive_buffer(STp, aSRpnt);  in osst_write_filemark()
2202 	STp->last_mark_ppos = this_mark_ppos;  in osst_write_filemark()
2203 	STp->last_mark_lbn  = this_mark_lbn;  in osst_write_filemark()
2204 	if (STp->header_cache != NULL && STp->filemark_cnt < OS_FM_TAB_MAX)  in osst_write_filemark()
2205 		STp->header_cache->dat_fm_tab.fm_tab_ent[STp->filemark_cnt] = htonl(this_mark_ppos);  in osst_write_filemark()
2206 	if (STp->filemark_cnt++ == 0)  in osst_write_filemark()
2207 		STp->first_mark_ppos = this_mark_ppos;  in osst_write_filemark()
2211 static int osst_write_eod(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_write_eod()  argument
2215 	char  * name = tape_name(STp);  in osst_write_eod()
2218 	if (STp->raw) return 0;  in osst_write_eod()
2220 	STp->write_type = OS_WRITE_EOD;  in osst_write_eod()
2221 	STp->eod_frame_ppos = STp->first_frame_position;  in osst_write_eod()
2224 			STp->eod_frame_ppos, STp->frame_seq_number, STp->logical_blk_num);  in osst_write_eod()
2226 	STp->dirty = 1;  in osst_write_eod()
2228 	result  = osst_flush_write_buffer(STp, aSRpnt);	  in osst_write_eod()
2229 	result |= osst_flush_drive_buffer(STp, aSRpnt);  in osst_write_eod()
2230 	STp->eod_frame_lfa = --(STp->frame_seq_number);  in osst_write_eod()
2234 static int osst_write_filler(struct osst_tape * STp, struct osst_request ** aSRpnt, int where, int …  in osst_write_filler()  argument
2236 	char * name = tape_name(STp);  in osst_write_filler()
2241 	osst_wait_ready(STp, aSRpnt, 60 * 5, 0);  in osst_write_filler()
2242 	osst_set_frame_position(STp, aSRpnt, where, 0);  in osst_write_filler()
2243 	STp->write_type = OS_WRITE_FILLER;  in osst_write_filler()
2245 		memcpy(STp->buffer->b_data, "Filler", 6);  in osst_write_filler()
2246 		STp->buffer->buffer_bytes = 6;  in osst_write_filler()
2247 		STp->dirty = 1;  in osst_write_filler()
2248 		if (osst_flush_write_buffer(STp, aSRpnt)) {  in osst_write_filler()
2256 	return osst_flush_drive_buffer(STp, aSRpnt);  in osst_write_filler()
2259 static int __osst_write_header(struct osst_tape * STp, struct osst_request ** aSRpnt, int where, in…  in __osst_write_header()  argument
2261 	char * name = tape_name(STp);  in __osst_write_header()
2267 	osst_wait_ready(STp, aSRpnt, 60 * 5, 0);  in __osst_write_header()
2268 	osst_set_frame_position(STp, aSRpnt, where, 0);  in __osst_write_header()
2269 	STp->write_type = OS_WRITE_HEADER;  in __osst_write_header()
2271 		osst_copy_to_buffer(STp->buffer, (unsigned char *)STp->header_cache);  in __osst_write_header()
2272 		STp->buffer->buffer_bytes = sizeof(os_header_t);  in __osst_write_header()
2273 		STp->dirty = 1;  in __osst_write_header()
2274 		if (osst_flush_write_buffer(STp, aSRpnt)) {  in __osst_write_header()
2279 	result = osst_flush_drive_buffer(STp, aSRpnt);  in __osst_write_header()
2286 static int osst_write_header(struct osst_tape * STp, struct osst_request ** aSRpnt, int locate_eod)  in osst_write_header()  argument
2290 	char        * name = tape_name(STp);  in osst_write_header()
2295 	if (STp->raw) return 0;  in osst_write_header()
2297 	if (STp->header_cache == NULL) {  in osst_write_header()
2298 		if ((STp->header_cache = vmalloc(sizeof(os_header_t))) == NULL) {  in osst_write_header()
2302 		memset(STp->header_cache, 0, sizeof(os_header_t));  in osst_write_header()
2307 	if (STp->header_ok) STp->update_frame_cntr++;  in osst_write_header()
2308 	else                STp->update_frame_cntr = 0;  in osst_write_header()
2310 	header = STp->header_cache;  in osst_write_header()
2318 	header->partition[0].wrt_pass_cntr              = htons(STp->wrt_pass_cntr);  in osst_write_header()
2319 	header->partition[0].first_frame_ppos           = htonl(STp->first_data_ppos);  in osst_write_header()
2320 	header->partition[0].last_frame_ppos            = htonl(STp->capacity);  in osst_write_header()
2321 	header->partition[0].eod_frame_ppos             = htonl(STp->eod_frame_ppos);  in osst_write_header()
2331 	header->ext_track_tb.dat_ext_trk_ey.last_hlb    = htonl(STp->eod_frame_lfa);  in osst_write_header()
2332 	header->ext_track_tb.dat_ext_trk_ey.last_pp	= htonl(STp->eod_frame_ppos);  in osst_write_header()
2335 	header->dat_fm_tab.fm_tab_ent_cnt               = htons(STp->filemark_cnt<OS_FM_TAB_MAX?  in osst_write_header()
2336 								STp->filemark_cnt:OS_FM_TAB_MAX);  in osst_write_header()
2338 	result  = __osst_write_header(STp, aSRpnt, 0xbae, 5);  in osst_write_header()
2339 	if (STp->update_frame_cntr == 0)  in osst_write_header()
2340 		    osst_write_filler(STp, aSRpnt, 0xbb3, 5);  in osst_write_header()
2341 	result &= __osst_write_header(STp, aSRpnt,     5, 5);  in osst_write_header()
2345 		printk(OSST_DEB_MSG "%s:D: Locating back to eod frame addr %d\n", name, STp->eod_frame_ppos);  in osst_write_header()
2347 		osst_set_frame_position(STp, aSRpnt, STp->eod_frame_ppos, 0);  in osst_write_header()
2352 		memcpy(STp->application_sig, "LIN4", 4);  in osst_write_header()
2353 		STp->linux_media         = 1;  in osst_write_header()
2354 		STp->linux_media_version = 4;  in osst_write_header()
2355 		STp->header_ok           = 1;  in osst_write_header()
2360 static int osst_reset_header(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_reset_header()  argument
2362 	if (STp->header_cache != NULL)  in osst_reset_header()
2363 		memset(STp->header_cache, 0, sizeof(os_header_t));  in osst_reset_header()
2365 	STp->logical_blk_num = STp->frame_seq_number = 0;  in osst_reset_header()
2366 	STp->frame_in_buffer = 0;  in osst_reset_header()
2367 	STp->eod_frame_ppos = STp->first_data_ppos = 0x0000000A;  in osst_reset_header()
2368 	STp->filemark_cnt = 0;  in osst_reset_header()
2369 	STp->first_mark_ppos = STp->last_mark_ppos = STp->last_mark_lbn = -1;  in osst_reset_header()
2370 	return osst_write_header(STp, aSRpnt, 1);  in osst_reset_header()
2373 static int __osst_analyze_headers(struct osst_tape * STp, struct osst_request ** aSRpnt, int ppos)  in __osst_analyze_headers()  argument
2375 	char        * name = tape_name(STp);  in __osst_analyze_headers()
2382 	if (STp->raw)  in __osst_analyze_headers()
2385 	if (ppos == 5 || ppos == 0xbae || STp->buffer->syscall_result) {  in __osst_analyze_headers()
2386 		if (osst_set_frame_position(STp, aSRpnt, ppos, 0))  in __osst_analyze_headers()
2388 		osst_wait_ready(STp, aSRpnt, 60 * 15, 0);  in __osst_analyze_headers()
2389 		if (osst_initiate_read (STp, aSRpnt)) {  in __osst_analyze_headers()
2394 	if (osst_read_frame(STp, aSRpnt, 180)) {  in __osst_analyze_headers()
2400 	header = (os_header_t *) STp->buffer->b_data;	/* warning: only first segment addressable */  in __osst_analyze_headers()
2401 	aux = STp->buffer->aux;  in __osst_analyze_headers()
2430 	if (update_frame_cntr < STp->update_frame_cntr) {  in __osst_analyze_headers()
2433 				   name, ppos, update_frame_cntr, STp->update_frame_cntr);  in __osst_analyze_headers()
2455 		STp->linux_media = 1;  in __osst_analyze_headers()
2464 	if (linux_media_version < STp->linux_media_version) {  in __osst_analyze_headers()
2471 	if (linux_media_version > STp->linux_media_version) {  in __osst_analyze_headers()
2476 		memcpy(STp->application_sig, id_string, 5);  in __osst_analyze_headers()
2477 		STp->linux_media_version = linux_media_version;  in __osst_analyze_headers()
2478 		STp->update_frame_cntr = -1;  in __osst_analyze_headers()
2480 	if (update_frame_cntr > STp->update_frame_cntr) {  in __osst_analyze_headers()
2485 		if (STp->header_cache == NULL) {  in __osst_analyze_headers()
2486 			if ((STp->header_cache = vmalloc(sizeof(os_header_t))) == NULL) {  in __osst_analyze_headers()
2494 		osst_copy_from_buffer(STp->buffer, (unsigned char *)STp->header_cache);  in __osst_analyze_headers()
2495 		header = STp->header_cache;	/* further accesses from cached (full) copy */  in __osst_analyze_headers()
2497 		STp->wrt_pass_cntr     = ntohs(header->partition[0].wrt_pass_cntr);  in __osst_analyze_headers()
2498 		STp->first_data_ppos   = ntohl(header->partition[0].first_frame_ppos);  in __osst_analyze_headers()
2499 		STp->eod_frame_ppos    = ntohl(header->partition[0].eod_frame_ppos);  in __osst_analyze_headers()
2500 		STp->eod_frame_lfa     = ntohl(header->ext_track_tb.dat_ext_trk_ey.last_hlb);  in __osst_analyze_headers()
2501 		STp->filemark_cnt      = ntohl(aux->filemark_cnt);  in __osst_analyze_headers()
2502 		STp->first_mark_ppos   = ntohl(aux->next_mark_ppos);  in __osst_analyze_headers()
2503 		STp->last_mark_ppos    = ntohl(aux->last_mark_ppos);  in __osst_analyze_headers()
2504 		STp->last_mark_lbn     = ntohl(aux->last_mark_lbn);  in __osst_analyze_headers()
2505 		STp->update_frame_cntr = update_frame_cntr;  in __osst_analyze_headers()
2508 			  name, STp->wrt_pass_cntr, STp->update_frame_cntr, STp->filemark_cnt);  in __osst_analyze_headers()
2510 			  STp->first_data_ppos,  in __osst_analyze_headers()
2514 			  name, STp->first_mark_ppos, STp->last_mark_ppos, STp->eod_frame_ppos);  in __osst_analyze_headers()
2516 		if (header->minor_rev < 4 && STp->linux_media_version == 4) {  in __osst_analyze_headers()
2528 		     header->partition[0].last_frame_ppos            != htonl(STp->capacity)       ||  in __osst_analyze_headers()
2538 		     header->ext_track_tb.dat_ext_trk_ey.last_pp     != htonl(STp->eod_frame_ppos) ||  in __osst_analyze_headers()
2542 			     htons(STp->filemark_cnt<OS_FM_TAB_MAX?STp->filemark_cnt:OS_FM_TAB_MAX)))  in __osst_analyze_headers()
2550 static int osst_analyze_headers(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_analyze_headers()  argument
2555 	char  * name  = tape_name(STp);  in osst_analyze_headers()
2557 	position = osst_get_frame_position(STp, aSRpnt);  in osst_analyze_headers()
2559 	if (STp->raw) {  in osst_analyze_headers()
2560 		STp->header_ok = STp->linux_media = 1;  in osst_analyze_headers()
2561 		STp->linux_media_version = 0;  in osst_analyze_headers()
2564 	STp->header_ok = STp->linux_media = STp->linux_media_version = 0;  in osst_analyze_headers()
2565 	STp->wrt_pass_cntr = STp->update_frame_cntr = -1;  in osst_analyze_headers()
2566 	STp->eod_frame_ppos = STp->first_data_ppos = -1;  in osst_analyze_headers()
2567 	STp->first_mark_ppos = STp->last_mark_ppos = STp->last_mark_lbn = -1;  in osst_analyze_headers()
2579 		if (__osst_analyze_headers(STp, aSRpnt, ppos))  in osst_analyze_headers()
2586 		if (__osst_analyze_headers(STp, aSRpnt, ppos))  in osst_analyze_headers()
2591 		STp->eod_frame_ppos = STp->first_data_ppos = 0;  in osst_analyze_headers()
2592 		osst_set_frame_position(STp, aSRpnt, 10, 0);  in osst_analyze_headers()
2595 	if (position <= STp->first_data_ppos) {  in osst_analyze_headers()
2596 		position = STp->first_data_ppos;  in osst_analyze_headers()
2597 		STp->ps[0].drv_file = STp->ps[0].drv_block = STp->frame_seq_number = STp->logical_blk_num = 0;  in osst_analyze_headers()
2599 	osst_set_frame_position(STp, aSRpnt, position, 0);  in osst_analyze_headers()
2600 	STp->header_ok = 1;  in osst_analyze_headers()
2605 static int osst_verify_position(struct osst_tape * STp, struct osst_request ** aSRpnt)  in osst_verify_position()  argument
2607 	int	frame_position  = STp->first_frame_position;  in osst_verify_position()
2608 	int	frame_seq_numbr = STp->frame_seq_number;  in osst_verify_position()
2609 	int	logical_blk_num = STp->logical_blk_num;  in osst_verify_position()
2610        	int	halfway_frame   = STp->frame_in_buffer;  in osst_verify_position()
2611 	int	read_pointer    = STp->buffer->read_pointer;  in osst_verify_position()
2615 	char  * name = tape_name(STp);  in osst_verify_position()
2619 	osst_set_frame_position(STp, aSRpnt, frame_position - 1, 0);  in osst_verify_position()
2620 	if (osst_get_logical_frame(STp, aSRpnt, -1, 0) < 0) {  in osst_verify_position()
2626 	if (STp->linux_media_version >= 4) {  in osst_verify_position()
2627 		for (i=0; i<STp->filemark_cnt; i++)  in osst_verify_position()
2628 			if ((n=ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[i])) < frame_position)  in osst_verify_position()
2632 	actual_mark_ppos = STp->buffer->aux->frame_type == OS_FRAME_TYPE_MARKER ?  in osst_verify_position()
2633 				frame_position - 1 : ntohl(STp->buffer->aux->last_mark_ppos);  in osst_verify_position()
2634 	if (frame_position  != STp->first_frame_position                   ||  in osst_verify_position()
2635 	    frame_seq_numbr != STp->frame_seq_number + (halfway_frame?0:1) ||  in osst_verify_position()
2639 				  STp->first_frame_position, frame_position,   in osst_verify_position()
2640 				  STp->frame_seq_number + (halfway_frame?0:1),  in osst_verify_position()
2647 		osst_set_frame_position(STp, aSRpnt, frame_position - 1, 0);  in osst_verify_position()
2648 		STp->buffer->buffer_bytes  = read_pointer;  in osst_verify_position()
2649 		STp->ps[STp->partition].rw = ST_WRITING;  in osst_verify_position()
2650 		STp->dirty                 = 1;  in osst_verify_position()
2652 	STp->frame_in_buffer  = halfway_frame;  in osst_verify_position()
2653 	STp->frame_seq_number = frame_seq_numbr;  in osst_verify_position()
2654 	STp->logical_blk_num  = logical_blk_num;  in osst_verify_position()
2681 static int osst_configure_onstream(struct osst_tape *STp, struct osst_request ** aSRpnt)  in osst_configure_onstream()  argument
2684 	char                         * name = tape_name(STp);  in osst_configure_onstream()
2692 	if (STp->ready != ST_READY) {  in osst_configure_onstream()
2699 	if (STp->os_fw_rev < 10600) {  in osst_configure_onstream()
2700 … printk(KERN_INFO "%s:I: Old OnStream firmware revision detected (%s),\n", name, STp->device->rev);  in osst_configure_onstream()
2714 	SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_FROM_DEVICE, STp->timeout, 0, 1);  in osst_configure_onstream()
2722 	if ((STp->buffer)->syscall_result != 0) {  in osst_configure_onstream()
2727 	header = (osst_mode_parameter_header_t *) (STp->buffer)->b_data;  in osst_configure_onstream()
2728 …bs = (osst_block_size_page_t *) ((STp->buffer)->b_data + sizeof(osst_mode_parameter_header_t) + he…  in osst_configure_onstream()
2751 	SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_TO_DEVICE, STp->timeout, 0, 1);  in osst_configure_onstream()
2753 	if ((STp->buffer)->syscall_result != 0) {  in osst_configure_onstream()
2764 	osst_set_retries(STp, aSRpnt, 0);  in osst_configure_onstream()
2782 	(STp->buffer)->b_data[MODE_HEADER_LENGTH + 0] = VENDOR_IDENT_PAGE | (1 << 7);  in osst_configure_onstream()
2783 	(STp->buffer)->b_data[MODE_HEADER_LENGTH + 1] = 6;  in osst_configure_onstream()
2784 	(STp->buffer)->b_data[MODE_HEADER_LENGTH + 2] = 'L';  in osst_configure_onstream()
2785 	(STp->buffer)->b_data[MODE_HEADER_LENGTH + 3] = 'I';  in osst_configure_onstream()
2786 	(STp->buffer)->b_data[MODE_HEADER_LENGTH + 4] = 'N';  in osst_configure_onstream()
2787 	(STp->buffer)->b_data[MODE_HEADER_LENGTH + 5] = '4';  in osst_configure_onstream()
2788 	(STp->buffer)->b_data[MODE_HEADER_LENGTH + 6] = 0;  in osst_configure_onstream()
2789 	(STp->buffer)->b_data[MODE_HEADER_LENGTH + 7] = 0;  in osst_configure_onstream()
2791 	SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_TO_DEVICE, STp->timeout, 0, 1);  in osst_configure_onstream()
2794 	if ((STp->buffer)->syscall_result != 0) {  in osst_configure_onstream()
2796 			(char *) ((STp->buffer)->b_data + MODE_HEADER_LENGTH + 2));  in osst_configure_onstream()
2806 	SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_FROM_DEVICE, STp->timeout, 0, 1);  in osst_configure_onstream()
2809 	if ((STp->buffer)->syscall_result != 0) {  in osst_configure_onstream()
2814 	header = (osst_mode_parameter_header_t *) (STp->buffer)->b_data;  in osst_configure_onstream()
2815 	cp     = (osst_capabilities_page_t    *) ((STp->buffer)->b_data +  in osst_configure_onstream()
2826 	SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_FROM_DEVICE, STp->timeout, 0, 1);  in osst_configure_onstream()
2829 	if ((STp->buffer)->syscall_result != 0) {  in osst_configure_onstream()
2834 	header = (osst_mode_parameter_header_t *) (STp->buffer)->b_data;  in osst_configure_onstream()
2835 	prm    = (osst_tape_paramtr_page_t    *) ((STp->buffer)->b_data +  in osst_configure_onstream()
2838 	STp->density  = prm->density;  in osst_configure_onstream()
2839 	STp->capacity = ntohs(prm->segtrk) * ntohs(prm->trks);  in osst_configure_onstream()
2842 			  name, STp->density, STp->capacity / 32, drive_buffer_size);  in osst_configure_onstream()
2852 static int cross_eof(struct osst_tape *STp, struct osst_request ** aSRpnt, int forward)  in cross_eof()  argument
2855 	char  * name = tape_name(STp);  in cross_eof()
2865 	   result = osst_space_over_filemarks_forward_slow(STp, aSRpnt, MTFSF, 1);  in cross_eof()
2869 	   result = osst_seek_logical_blk(STp, aSRpnt, STp->logical_blk_num - 1);  in cross_eof()
2881 static int osst_get_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt)  in osst_get_frame_position()  argument
2886 	char    	      * name   = tape_name(STp);  in osst_get_frame_position()
2891 	char	      * olddata = STp->buffer->b_data;  in osst_get_frame_position()
2892 	int		oldsize = STp->buffer->buffer_size;  in osst_get_frame_position()
2894 	if (STp->ready != ST_READY) return (-EIO);  in osst_get_frame_position()
2899 	STp->buffer->b_data = mybuf; STp->buffer->buffer_size = 24;  in osst_get_frame_position()
2900 	SRpnt = osst_do_scsi(*aSRpnt, STp, scmd, 20, DMA_FROM_DEVICE,  in osst_get_frame_position()
2901 				      STp->timeout, MAX_RETRIES, 1);  in osst_get_frame_position()
2903 		STp->buffer->b_data = olddata; STp->buffer->buffer_size = oldsize;  in osst_get_frame_position()
2908 	if (STp->buffer->syscall_result)  in osst_get_frame_position()
2919 			STp->buffer->b_data = mybuf; STp->buffer->buffer_size = 24;  in osst_get_frame_position()
2920 			SRpnt = osst_do_scsi(SRpnt, STp, scmd, 20, DMA_FROM_DEVICE,  in osst_get_frame_position()
2921 						    STp->timeout, MAX_RETRIES, 1);  in osst_get_frame_position()
2924 					name, mysense[2], mysense[12], mysense[13], STp->buffer->syscall_result?"":"ok:",  in osst_get_frame_position()
2927 			if (!STp->buffer->syscall_result)  in osst_get_frame_position()
2932 		STp->first_frame_position = ((STp->buffer)->b_data[4] << 24)  in osst_get_frame_position()
2933 					  + ((STp->buffer)->b_data[5] << 16)  in osst_get_frame_position()
2934 					  + ((STp->buffer)->b_data[6] << 8)  in osst_get_frame_position()
2935 					  +  (STp->buffer)->b_data[7];  in osst_get_frame_position()
2936 		STp->last_frame_position  = ((STp->buffer)->b_data[ 8] << 24)  in osst_get_frame_position()
2937 					  + ((STp->buffer)->b_data[ 9] << 16)  in osst_get_frame_position()
2938 					  + ((STp->buffer)->b_data[10] <<  8)  in osst_get_frame_position()
2939 					  +  (STp->buffer)->b_data[11];  in osst_get_frame_position()
2940 		STp->cur_frames           =  (STp->buffer)->b_data[15];  in osst_get_frame_position()
2944 					    STp->first_frame_position, STp->last_frame_position,  in osst_get_frame_position()
2945 					    ((STp->buffer)->b_data[0]&0x80)?" (BOP)":  in osst_get_frame_position()
2946 					    ((STp->buffer)->b_data[0]&0x40)?" (EOP)":"",  in osst_get_frame_position()
2947 					    STp->cur_frames);  in osst_get_frame_position()
2950 		if (STp->cur_frames == 0 && STp->first_frame_position != STp->last_frame_position) {  in osst_get_frame_position()
2953 					STp->first_frame_position, STp->last_frame_position, STp->cur_frames);  in osst_get_frame_position()
2955 			STp->first_frame_position = STp->last_frame_position;  in osst_get_frame_position()
2958 	STp->buffer->b_data = olddata; STp->buffer->buffer_size = oldsize;  in osst_get_frame_position()
2960 	return (result == 0 ? STp->first_frame_position : result);  in osst_get_frame_position()
2965 static int osst_set_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt, int ppos, …  in osst_set_frame_position()  argument
2972 	char		      * name   = tape_name(STp);  in osst_set_frame_position()
2974 	if (STp->ready != ST_READY) return (-EIO);  in osst_set_frame_position()
2976 	STps = &(STp->ps[STp->partition]);  in osst_set_frame_position()
2978 	if (ppos < 0 || ppos > STp->capacity) {  in osst_set_frame_position()
2980 		pp = ppos = ppos < 0 ? 0 : (STp->capacity - 1);  in osst_set_frame_position()
2999 		SRpnt = osst_do_scsi(*aSRpnt, STp, scmd, 0, DMA_NONE, STp->long_timeout,  in osst_set_frame_position()
3005 		if ((STp->buffer)->syscall_result != 0) {  in osst_set_frame_position()
3008 					name, STp->first_frame_position, pp);  in osst_set_frame_position()
3013 			osst_wait_ready(STp, aSRpnt, 5 * 60, OSST_WAIT_POSITION_COMPLETE);  in osst_set_frame_position()
3015 	STp->first_frame_position = STp->last_frame_position = ppos;  in osst_set_frame_position()
3019 	STp->frame_in_buffer = 0;  in osst_set_frame_position()
3023 static int osst_write_trailer(struct osst_tape *STp, struct osst_request ** aSRpnt, int leave_at_EO…  in osst_write_trailer()  argument
3025 	struct st_partstat * STps = &(STp->ps[STp->partition]);  in osst_write_trailer()
3028 	if (STp->write_type != OS_WRITE_NEW_MARK) {  in osst_write_trailer()
3030 		result = osst_flush_drive_buffer(STp, aSRpnt);  in osst_write_trailer()
3032 		result = osst_write_filemark(STp, aSRpnt);  in osst_write_trailer()
3039 	result = osst_write_eod(STp, aSRpnt);  in osst_write_trailer()
3040 	osst_write_header(STp, aSRpnt, leave_at_EOT);  in osst_write_trailer()
3050 static int osst_flush_write_buffer(struct osst_tape *STp, struct osst_request ** aSRpnt)  in osst_flush_write_buffer()  argument
3057 	char		      * name = tape_name(STp);  in osst_flush_write_buffer()
3059 	if ((STp->buffer)->writing) {  in osst_flush_write_buffer()
3060 		if (SRpnt == (STp->buffer)->last_SRpnt)  in osst_flush_write_buffer()
3071 		osst_write_behind_check(STp);  in osst_flush_write_buffer()
3072 		if ((STp->buffer)->syscall_result) {  in osst_flush_write_buffer()
3076 				       name, (STp->buffer)->midlevel_result);  in osst_flush_write_buffer()
3078 			if ((STp->buffer)->midlevel_result == INT_MAX)  in osst_flush_write_buffer()
3085 	if (STp->dirty == 1) {  in osst_flush_write_buffer()
3087 		STp->write_count++;  in osst_flush_write_buffer()
3088 		STps     = &(STp->ps[STp->partition]);  in osst_flush_write_buffer()
3090 		offset   = STp->buffer->buffer_bytes;  in osst_flush_write_buffer()
3091 		blks     = (offset + STp->block_size - 1) / STp->block_size;  in osst_flush_write_buffer()
3095 			osst_zero_buffer_tail(STp->buffer);  in osst_flush_write_buffer()
3097 		if (STp->poll)  in osst_flush_write_buffer()
3098 			if (osst_wait_frame (STp, aSRpnt, STp->first_frame_position, -50, 120))  in osst_flush_write_buffer()
3099 				result = osst_recover_wait_frame(STp, aSRpnt, 1);  in osst_flush_write_buffer()
3106 		switch	(STp->write_type) {  in osst_flush_write_buffer()
3111 					name, blks, STp->frame_seq_number,   in osst_flush_write_buffer()
3112 					STp->logical_blk_num - blks, STp->logical_blk_num - 1);  in osst_flush_write_buffer()
3114 			osst_init_aux(STp, OS_FRAME_TYPE_DATA, STp->frame_seq_number++,  in osst_flush_write_buffer()
3115 				      STp->logical_blk_num - blks, STp->block_size, blks);  in osst_flush_write_buffer()
3118 			osst_init_aux(STp, OS_FRAME_TYPE_EOD, STp->frame_seq_number++,  in osst_flush_write_buffer()
3119 				      STp->logical_blk_num, 0, 0);  in osst_flush_write_buffer()
3122 			osst_init_aux(STp, OS_FRAME_TYPE_MARKER, STp->frame_seq_number++,  in osst_flush_write_buffer()
3123 				      STp->logical_blk_num++, 0, blks=1);  in osst_flush_write_buffer()
3126 			osst_init_aux(STp, OS_FRAME_TYPE_HEADER, 0, 0, 0, blks=0);  in osst_flush_write_buffer()
3129 			osst_init_aux(STp, OS_FRAME_TYPE_FILL, 0, 0, 0, 0);  in osst_flush_write_buffer()
3137 		SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, transfer, DMA_TO_DEVICE,  in osst_flush_write_buffer()
3138 					      STp->timeout, MAX_RETRIES, 1);  in osst_flush_write_buffer()
3143 		if ((STp->buffer)->syscall_result != 0) {  in osst_flush_write_buffer()
3153 				STp->dirty = 0;  in osst_flush_write_buffer()
3154 				(STp->buffer)->buffer_bytes = 0;  in osst_flush_write_buffer()
3158 				if (osst_write_error_recovery(STp, aSRpnt, 1)) {  in osst_flush_write_buffer()
3166 			STp->first_frame_position++;  in osst_flush_write_buffer()
3167 			STp->dirty = 0;  in osst_flush_write_buffer()
3168 			(STp->buffer)->buffer_bytes = 0;  in osst_flush_write_buffer()
3180 static int osst_flush_buffer(struct osst_tape * STp, struct osst_request ** aSRpnt, int seek_next)  in osst_flush_buffer()  argument
3185 	char * name = tape_name(STp);  in osst_flush_buffer()
3192 	if( STp->pos_unknown)  in osst_flush_buffer()
3195 	if (STp->ready != ST_READY)  in osst_flush_buffer()
3198 	STps = &(STp->ps[STp->partition]);  in osst_flush_buffer()
3199 	if (STps->rw == ST_WRITING || STp->dirty) {	/* Writing */  in osst_flush_buffer()
3200 		STp->write_type = OS_WRITE_DATA;  in osst_flush_buffer()
3201 		return osst_flush_write_buffer(STp, aSRpnt);  in osst_flush_buffer()
3203 	if (STp->block_size == 0)  in osst_flush_buffer()
3210 	if (!STp->can_bsr) {  in osst_flush_buffer()
3211 		backspace = ((STp->buffer)->buffer_bytes + (STp->buffer)->read_pointer) / STp->block_size -  in osst_flush_buffer()
3212 			    ((STp->buffer)->read_pointer + STp->block_size - 1        ) / STp->block_size ;  in osst_flush_buffer()
3213 		(STp->buffer)->buffer_bytes = 0;  in osst_flush_buffer()
3214 		(STp->buffer)->read_pointer = 0;  in osst_flush_buffer()
3215 		STp->frame_in_buffer = 0;		/* FIXME is this relevant w. OSST? */  in osst_flush_buffer()
3220 			result = cross_eof(STp, aSRpnt, 0); /* Back over the EOF hit */  in osst_flush_buffer()
3230 			result = osst_seek_logical_blk(STp, aSRpnt, STp->logical_blk_num - backspace);  in osst_flush_buffer()
3242 static int osst_write_frame(struct osst_tape * STp, struct osst_request ** aSRpnt, int synchronous)  in osst_write_frame()  argument
3248 	char		      * name = tape_name(STp);  in osst_write_frame()
3251 	if ((!STp-> raw) && (STp->first_frame_position == 0xbae)) { /* _must_ preserve buffer! */  in osst_write_frame()
3255 		if (osst_flush_drive_buffer(STp, aSRpnt) < 0) {  in osst_write_frame()
3259 		if (osst_get_frame_position(STp, aSRpnt) < 0xbb8) {  in osst_write_frame()
3263 		osst_position_tape_and_confirm(STp, aSRpnt, 0xbb8);  in osst_write_frame()
3267 	if (STp->poll)  in osst_write_frame()
3268 		if (osst_wait_frame (STp, aSRpnt, STp->first_frame_position, -48, 120))  in osst_write_frame()
3269 			if (osst_recover_wait_frame(STp, aSRpnt, 1))  in osst_write_frame()
3274 	STp->ps[STp->partition].rw = ST_WRITING;  in osst_write_frame()
3275 	STp->write_type            = OS_WRITE_DATA;  in osst_write_frame()
3281 	blks     = STp->buffer->buffer_bytes / STp->block_size;  in osst_write_frame()
3285 			STp->frame_seq_number, STp->logical_blk_num - blks, STp->logical_blk_num - 1);  in osst_write_frame()
3287 	osst_init_aux(STp, OS_FRAME_TYPE_DATA, STp->frame_seq_number++,  in osst_write_frame()
3288 		      STp->logical_blk_num - blks, STp->block_size, blks);  in osst_write_frame()
3292 		STp->write_pending = 1;  in osst_write_frame()
3294 	SRpnt = osst_do_scsi(*aSRpnt, STp, cmd, OS_FRAME_SIZE, DMA_TO_DEVICE, STp->timeout,  in osst_write_frame()
3301 		if (STp->buffer->syscall_result != 0) {  in osst_write_frame()
3312 				if (osst_write_error_recovery(STp, aSRpnt, 1))  in osst_write_frame()
3317 			STp->first_frame_position++;  in osst_write_frame()
3320 	STp->write_count++;  in osst_write_frame()
3326 static int do_door_lock(struct osst_tape * STp, int do_lock)  in do_door_lock()  argument
3332 	printk(OSST_DEB_MSG "%s:D: %socking drive door.\n", tape_name(STp), do_lock ? "L" : "Unl");  in do_door_lock()
3334 	retval = scsi_ioctl(STp->device, cmd, NULL);  in do_door_lock()
3336 		STp->door_locked = do_lock ? ST_LOCKED_EXPLICIT : ST_UNLOCKED;  in do_door_lock()
3339 		STp->door_locked = ST_LOCK_FAILS;  in do_door_lock()
3345 static void reset_state(struct osst_tape *STp)  in reset_state()  argument
3350 	STp->pos_unknown = 0;  in reset_state()
3352 		STps = &(STp->ps[i]);  in reset_state()
3376 	struct osst_tape    * STp  = filp->private_data;  in osst_write()  local
3377 	char		    * name = tape_name(STp);  in osst_write()
3380 	if (mutex_lock_interruptible(&STp->lock))  in osst_write()
3389 	if( !scsi_block_when_processing_errors(STp->device) ) {  in osst_write()
3394 	if (STp->ready != ST_READY) {  in osst_write()
3395 		if (STp->ready == ST_NO_TAPE)  in osst_write()
3401 	STm = &(STp->modes[STp->current_mode]);  in osst_write()
3413 	if (STp->pos_unknown) {  in osst_write()
3419 	if (!STp->in_use) {  in osst_write()
3426 	if (STp->write_prot) {  in osst_write()
3432 	if (STp->block_size != 0 && (count % STp->block_size) != 0) {  in osst_write()
3434 				       name, count, STp->block_size<1024?  in osst_write()
3435 				       STp->block_size:STp->block_size/1024, STp->block_size<1024?'b':'k');  in osst_write()
3440 	if (STp->first_frame_position >= STp->capacity - OSST_EOM_RESERVE) {  in osst_write()
3442 				       name, STp->first_frame_position);  in osst_write()
3447 	if (STp->do_auto_lock && STp->door_locked == ST_UNLOCKED && !do_door_lock(STp, 1))  in osst_write()
3448 		STp->door_locked = ST_LOCKED_AUTO;  in osst_write()
3450 	STps = &(STp->ps[STp->partition]);  in osst_write()
3457 		retval = osst_flush_buffer(STp, &SRpnt, 0);  in osst_write()
3464 		if (!STp->header_ok ||  in osst_write()
3465 		    (STp->first_frame_position == STp->first_data_ppos && STps->drv_block < 0) ||  in osst_write()
3467 			STp->wrt_pass_cntr++;  in osst_write()
3470 						  name, STp->wrt_pass_cntr);  in osst_write()
3472 			osst_reset_header(STp, &SRpnt);  in osst_write()
3477 			if ((STp->fast_open && osst_verify_position(STp, &SRpnt)) ||  in osst_write()
3479 				if (STp->first_frame_position == STp->eod_frame_ppos) {	/* at EOD */  in osst_write()
3480 			  		STps->drv_file = STp->filemark_cnt;  in osst_write()
3493 			if ((STps->drv_file + STps->drv_block) > 0 && STps->drv_file < STp->filemark_cnt) {  in osst_write()
3494 				STp->filemark_cnt = STps->drv_file;  in osst_write()
3495 				STp->last_mark_ppos =  in osst_write()
3496 				       	ntohl(STp->header_cache->dat_fm_tab.fm_tab_ent[STp->filemark_cnt-1]);  in osst_write()
3499 						name, STps->drv_file, STp->wrt_pass_cntr);  in osst_write()
3506 					name, STp->filemark_cnt, STp->last_mark_ppos, STp->last_mark_lbn);  in osst_write()
3510 		STp->fast_open = 0;  in osst_write()
3512 	if (!STp->header_ok) {  in osst_write()
3520 	if ((STp->buffer)->writing) {  in osst_write()
3522 		osst_write_behind_check(STp);  in osst_write()
3523 		if ((STp->buffer)->syscall_result) {  in osst_write()
3527 						 (STp->buffer)->midlevel_result);  in osst_write()
3529 		if ((STp->buffer)->midlevel_result == INT_MAX)  in osst_write()
3556 		write_threshold = (STp->buffer)->buffer_blocks * STp->block_size;  in osst_write()
3565 				STp->logical_blk_num, STp->frame_seq_number, STp->first_frame_position);  in osst_write()
3568 	while ((STp->buffer)->buffer_bytes + count > write_threshold)  in osst_write()
3571 		do_count = (STp->buffer)->buffer_blocks * STp->block_size -  in osst_write()
3572 			   (STp->buffer)->buffer_bytes;  in osst_write()
3576 		i = append_to_buffer(b_point, STp->buffer, do_count);  in osst_write()
3582 		blks = do_count / STp->block_size;  in osst_write()
3583 		STp->logical_blk_num += blks;  /* logical_blk_num is incremented as data is moved from user */  in osst_write()
3585 		i = osst_write_frame(STp, &SRpnt, 1);  in osst_write()
3588 			transfer = STp->buffer->writing;	/* FIXME -- check this logic */  in osst_write()
3593 					STps->drv_block += (do_count - transfer) / STp->block_size;  in osst_write()
3621 			STp->buffer->buffer_bytes = 0;  in osst_write()
3622 			STp->dirty = 0;  in osst_write()
3634 		STp->buffer->buffer_bytes = 0;  in osst_write()
3635 		STp->dirty = 0;  in osst_write()
3639 		STp->dirty = 1;  in osst_write()
3640 		i = append_to_buffer(b_point, STp->buffer, count);  in osst_write()
3645 		blks = count / STp->block_size;  in osst_write()
3646 		STp->logical_blk_num += blks;  in osst_write()
3654 	if (doing_write && (STp->buffer)->syscall_result != 0) {  in osst_write()
3655 		retval = (STp->buffer)->syscall_result;  in osst_write()
3659 	if (STm->do_async_writes && ((STp->buffer)->buffer_bytes >= STp->write_threshold)) {   in osst_write()
3661 		(STp->buffer)->writing = ((STp->buffer)->buffer_bytes /  in osst_write()
3662 					   STp->block_size) * STp->block_size;  in osst_write()
3663 		STp->dirty = !((STp->buffer)->writing ==  in osst_write()
3664 				          (STp->buffer)->buffer_bytes);  in osst_write()
3666 		i = osst_write_frame(STp, &SRpnt, 0);  in osst_write()
3682 	mutex_unlock(&STp->lock);  in osst_write()
3697 	struct osst_tape    * STp   = filp->private_data;  in osst_read()  local
3698 	char		    * name  = tape_name(STp);  in osst_read()
3701 	if (mutex_lock_interruptible(&STp->lock))  in osst_read()
3710 	if( !scsi_block_when_processing_errors(STp->device) ) {  in osst_read()
3715 	if (STp->ready != ST_READY) {  in osst_read()
3716 		if (STp->ready == ST_NO_TAPE)  in osst_read()
3722 	STm = &(STp->modes[STp->current_mode]);  in osst_read()
3728 	if (!STp->in_use) {  in osst_read()
3735 	if (!STp->header_ok) {  in osst_read()
3740 	if (STp->do_auto_lock && STp->door_locked == ST_UNLOCKED && !do_door_lock(STp, 1))  in osst_read()
3741 		STp->door_locked = ST_LOCKED_AUTO;  in osst_read()
3743 	STps = &(STp->ps[STp->partition]);  in osst_read()
3745 		retval = osst_flush_buffer(STp, &SRpnt, 0);  in osst_read()
3752 	if ((count % STp->block_size) != 0) {  in osst_read()
3755 		    STp->block_size<1024?STp->block_size:STp->block_size/1024, STp->block_size<1024?'b':'k');  in osst_read()
3761 				     STps->eof, (STp->buffer)->buffer_bytes);  in osst_read()
3763 	if ((STp->buffer)->buffer_bytes == 0 &&  in osst_read()
3785 	for (total = 0, special = 0; total < count - STp->block_size + 1 && !special; ) {  in osst_read()
3788 		if ((STp->buffer)->buffer_bytes == 0) {  in osst_read()
3791 			special = osst_get_logical_frame(STp, &SRpnt, STp->frame_seq_number, 0);  in osst_read()
3793 				STp->frame_in_buffer = 0;  in osst_read()
3800 		if ((STp->buffer)->buffer_bytes > 0) {  in osst_read()
3804 						 STps->eof, (STp->buffer)->buffer_bytes, (int) (count - total));  in osst_read()
3807 			transfer = (((STp->buffer)->buffer_bytes < count - total ?  in osst_read()
3808 				     (STp->buffer)->buffer_bytes : count - total)/  in osst_read()
3809 					STp->block_size) * STp->block_size;  in osst_read()
3814 			   		name, count, STp->block_size < 1024?  in osst_read()
3815 					STp->block_size:STp->block_size/1024,  in osst_read()
3816 				       	STp->block_size<1024?'b':'k');  in osst_read()
3819 			i = from_buffer(STp->buffer, buf, transfer);  in osst_read()
3824 			STp->logical_blk_num += transfer / STp->block_size;  in osst_read()
3825 			STps->drv_block      += transfer / STp->block_size;  in osst_read()
3831 		if ((STp->buffer)->buffer_bytes == 0) {  in osst_read()
3835 					       	name, STp->frame_seq_number);  in osst_read()
3837 			STp->frame_in_buffer = 0;  in osst_read()
3838 			STp->frame_seq_number++;              /* frame to look for next time */  in osst_read()
3845 			STps->eof = (STp->first_frame_position >= STp->eod_frame_ppos)?ST_EOD_2:ST_FM;  in osst_read()
3867 	mutex_unlock(&STp->lock);  in osst_read()
3874 static void osst_log_options(struct osst_tape *STp, struct st_modedef *STm, char *name)  in osst_log_options()  argument
3878 	 name, STp->current_mode, STm->do_buffer_writes, STm->do_async_writes,  in osst_log_options()
3882 	 name, STp->can_bsr, STp->two_fm, STp->fast_mteom, STp->do_auto_lock);  in osst_log_options()
3885 	 name, STm->defaults_for_writes, STp->omit_blklims, STp->can_partitions,  in osst_log_options()
3886 	 STp->scsi2_logical);  in osst_log_options()
3897 static int osst_set_options(struct osst_tape *STp, long options)  in osst_set_options()  argument
3902 	char		  * name = tape_name(STp);  in osst_set_options()
3904 	STm = &(STp->modes[STp->current_mode]);  in osst_set_options()
3906 		memcpy(STm, &(STp->modes[0]), sizeof(*STm));  in osst_set_options()
3911 					     name, STp->current_mode);  in osst_set_options()
3921 		STp->two_fm	      = (options & MT_ST_TWO_FM) != 0;  in osst_set_options()
3922 		STp->fast_mteom	      = (options & MT_ST_FAST_MTEOM) != 0;  in osst_set_options()
3923 		STp->do_auto_lock     = (options & MT_ST_AUTO_LOCK) != 0;  in osst_set_options()
3924 		STp->can_bsr          = (options & MT_ST_CAN_BSR) != 0;  in osst_set_options()
3925 		STp->omit_blklims     = (options & MT_ST_NO_BLKLIMS) != 0;  in osst_set_options()
3926 		if ((STp->device)->scsi_level >= SCSI_2)  in osst_set_options()
3927 			STp->can_partitions = (options & MT_ST_CAN_PARTITIONS) != 0;  in osst_set_options()
3928 		STp->scsi2_logical    = (options & MT_ST_SCSI2LOGICAL) != 0;  in osst_set_options()
3933 		osst_log_options(STp, STm, name);  in osst_set_options()
3946 			STp->two_fm = value;  in osst_set_options()
3948 			STp->fast_mteom = value;  in osst_set_options()
3950 			STp->do_auto_lock = value;  in osst_set_options()
3952 			STp->can_bsr = value;  in osst_set_options()
3954 			STp->omit_blklims = value;  in osst_set_options()
3955 		if ((STp->device)->scsi_level >= SCSI_2 &&  in osst_set_options()
3957 			STp->can_partitions = value;  in osst_set_options()
3959 			STp->scsi2_logical = value;  in osst_set_options()
3966 		osst_log_options(STp, STm, name);  in osst_set_options()
3975 		STp->write_threshold = value;  in osst_set_options()
3999 			STp->long_timeout = (value & ~MT_ST_SET_LONG_TIMEOUT) * HZ;  in osst_set_options()
4004 			STp->timeout = value * HZ;  in osst_set_options()
4024 				STp->default_drvbuffer = 0xff;  in osst_set_options()
4028 				STp->default_drvbuffer = value & 7;  in osst_set_options()
4030 						  name, STp->default_drvbuffer);  in osst_set_options()
4053 static int osst_int_ioctl(struct osst_tape * STp, struct osst_request ** aSRpnt,  in osst_int_ioctl()  argument
4065 	char		      * name = tape_name(STp);  in osst_int_ioctl()
4067 	if (STp->ready != ST_READY && cmd_in != MTLOAD) {  in osst_int_ioctl()
4068 		if (STp->ready == ST_NO_TAPE)  in osst_int_ioctl()
4073 	timeout = STp->long_timeout;  in osst_int_ioctl()
4074 	STps = &(STp->ps[STp->partition]);  in osst_int_ioctl()
4078 	frame_seq_numbr = STp->frame_seq_number;  in osst_int_ioctl()
4079 	logical_blk_num = STp->logical_blk_num;  in osst_int_ioctl()
4086 		if (STp->raw)  in osst_int_ioctl()
4088 		if (STp->linux_media)  in osst_int_ioctl()
4089 		   ioctl_result = osst_space_over_filemarks_forward_fast(STp, &SRpnt, cmd_in, arg);  in osst_int_ioctl()
4091 		   ioctl_result = osst_space_over_filemarks_forward_slow(STp, &SRpnt, cmd_in, arg);  in osst_int_ioctl()
4101 		if (STp->raw)  in osst_int_ioctl()
4103 		ioctl_result = osst_space_over_filemarks_backward(STp, &SRpnt, cmd_in, arg);  in osst_int_ioctl()
4125 		ioctl_result = osst_seek_logical_blk(STp, &SRpnt, logical_blk_num);  in osst_int_ioctl()
4169 		 if ((STps->rw == ST_WRITING || STp->dirty) && !STp->pos_unknown) {  in osst_int_ioctl()
4170 			STp->write_type = OS_WRITE_DATA;  in osst_int_ioctl()
4171 			ioctl_result = osst_flush_write_buffer(STp, &SRpnt);  in osst_int_ioctl()
4179 			ioctl_result |= osst_write_filemark(STp, &SRpnt);  in osst_int_ioctl()
4185 		 if (STp->write_prot)  in osst_int_ioctl()
4187 		 if (!STp->raw)  in osst_int_ioctl()
4195 		 timeout = STp->timeout;  in osst_int_ioctl()
4213 		     if (STp->ready == ST_NO_TAPE)  in osst_int_ioctl()
4222 		 timeout = STp->timeout;  in osst_int_ioctl()
4255 		if ((osst_position_tape_and_confirm(STp, &SRpnt, STp->eod_frame_ppos) < 0) ||  in osst_int_ioctl()
4256 			    (osst_get_logical_frame(STp, &SRpnt, -1, 0)               < 0)) {  in osst_int_ioctl()
4260 		if (STp->buffer->aux->frame_type != OS_FRAME_TYPE_EOD) {  in osst_int_ioctl()
4267 		ioctl_result = osst_set_frame_position(STp, &SRpnt, STp->eod_frame_ppos, 0);  in osst_int_ioctl()
4268 		fileno = STp->filemark_cnt;  in osst_int_ioctl()
4273 		if (STp->write_prot)  in osst_int_ioctl()
4275 		ioctl_result = osst_reset_header(STp, &SRpnt);  in osst_int_ioctl()
4276 		i = osst_write_eod(STp, &SRpnt);  in osst_int_ioctl()
4278 		i = osst_position_tape_and_confirm(STp, &SRpnt, STp->eod_frame_ppos);  in osst_int_ioctl()
4295 		     !STp->dirty				  &&  in osst_int_ioctl()
4296 		     ((STp->buffer)->buffer_bytes == 0)		  &&  in osst_int_ioctl()
4306 			 STp->block_size = (arg & MT_ST_BLKSIZE_MASK);  in osst_int_ioctl()
4308 					   name, STp->block_size);  in osst_int_ioctl()
4315 		 if (STp->dirty || (STp->buffer)->buffer_bytes != 0)  in osst_int_ioctl()
4319 		     (arg & MT_ST_BLKSIZE_MASK) != STp->block_size       ) {  in osst_int_ioctl()
4331 	SRpnt = osst_do_scsi(SRpnt, STp, cmd, datalen, direction, timeout, MAX_RETRIES, 1);  in osst_int_ioctl()
4333 	ioctl_result = (STp->buffer)->syscall_result;  in osst_int_ioctl()
4343 		STp->frame_seq_number = frame_seq_numbr;  in osst_int_ioctl()
4344 		STp->logical_blk_num  = logical_blk_num;  in osst_int_ioctl()
4370 			ioctl_result = osst_seek_logical_blk(STp, &SRpnt, STp->logical_blk_num-1);  in osst_int_ioctl()
4372 			STp->logical_blk_num++;  in osst_int_ioctl()
4373 			STp->frame_seq_number++;  in osst_int_ioctl()
4374 			STp->frame_in_buffer = 0;  in osst_int_ioctl()
4375 			STp->buffer->read_pointer = 0;  in osst_int_ioctl()
4378 			STps->eof = (STp->first_frame_position >= STp->eod_frame_ppos)?ST_EOD:ST_FM;  in osst_int_ioctl()
4383 			STp->rew_at_close = 0;  in osst_int_ioctl()
4386 			    STp->ps[i].rw = ST_IDLE;  in osst_int_ioctl()
4387 			    STp->ps[i].last_block_valid = 0;/* FIXME - where else is this field maintained? */  in osst_int_ioctl()
4389 			STp->partition = 0;  in osst_int_ioctl()
4393 			ioctl_result = osst_position_tape_and_confirm(STp, &SRpnt, STp->first_data_ppos);   in osst_int_ioctl()
4399 		if (osst_position_tape_and_confirm(STp, &SRpnt, STp->first_data_ppos) < 0)  in osst_int_ioctl()
4405 		if (osst_position_tape_and_confirm(STp, &SRpnt, STp->eod_frame_ppos) < 0)  in osst_int_ioctl()
4408 			STps->drv_file  = STp->filemark_cnt;  in osst_int_ioctl()
4415 		STp->header_ok = 0;  in osst_int_ioctl()
4417 		STp->header_ok = 0;  in osst_int_ioctl()
4429 		if (cmd_in == MTLOAD && osst_wait_for_medium(STp, &SRpnt, 60))  in osst_int_ioctl()
4430 			ioctl_result = osst_wait_ready(STp, &SRpnt, 5 * 60, OSST_WAIT_POSITION_COMPLETE);  in osst_int_ioctl()
4445 	struct osst_tape    * STp;  in __os_scsi_tape_open()  local
4461 	    (STp = os_scsi_tapes[dev]) == NULL || !STp->device) {  in __os_scsi_tape_open()
4466 	name = tape_name(STp);  in __os_scsi_tape_open()
4468 	if (STp->in_use) {  in __os_scsi_tape_open()
4475 	if (scsi_device_get(STp->device)) {  in __os_scsi_tape_open()
4482 	filp->private_data = STp;  in __os_scsi_tape_open()
4483 	STp->in_use = 1;  in __os_scsi_tape_open()
4485 	STp->rew_at_close = TAPE_REWIND(inode);  in __os_scsi_tape_open()
4487 	if( !scsi_block_when_processing_errors(STp->device) ) {  in __os_scsi_tape_open()
4491 	if (mode != STp->current_mode) {  in __os_scsi_tape_open()
4495 					       name, STp->current_mode, mode);  in __os_scsi_tape_open()
4498 		STp->current_mode = mode;  in __os_scsi_tape_open()
4500 	STm = &(STp->modes[STp->current_mode]);  in __os_scsi_tape_open()
4503 	STp->write_prot = ((flags & O_ACCMODE) == O_RDONLY);  in __os_scsi_tape_open()
4505 	STp->raw = TAPE_IS_RAW(inode);  in __os_scsi_tape_open()
4506 	if (STp->raw)  in __os_scsi_tape_open()
4507 		STp->header_ok = 0;  in __os_scsi_tape_open()
4510 	if (!enlarge_buffer(STp->buffer, STp->restr_dma)) {  in __os_scsi_tape_open()
4515 	if (STp->buffer->buffer_size >= OS_FRAME_SIZE) {  in __os_scsi_tape_open()
4517 		     (i < STp->buffer->sg_segs) && ((b_size + STp->buffer->sg[i].length) <= OS_DATA_SIZE);   in __os_scsi_tape_open()
4518 		     b_size += STp->buffer->sg[i++].length);  in __os_scsi_tape_open()
4519 …STp->buffer->aux = (os_aux_t *) (page_address(sg_page(&STp->buffer->sg[i])) + OS_DATA_SIZE - b_siz…  in __os_scsi_tape_open()
4522 			STp->buffer->b_data, page_address(STp->buffer->sg[0].page));  in __os_scsi_tape_open()
4524 			 STp->buffer->aux, i, page_address(STp->buffer->sg[i].page));  in __os_scsi_tape_open()
4527 		STp->buffer->aux = NULL; /* this had better never happen! */  in __os_scsi_tape_open()
4532 	STp->buffer->writing = 0;  in __os_scsi_tape_open()
4533 	STp->buffer->syscall_result = 0;  in __os_scsi_tape_open()
4534 	STp->dirty = 0;  in __os_scsi_tape_open()
4536 		STps = &(STp->ps[i]);  in __os_scsi_tape_open()
4539 	STp->ready = ST_READY;  in __os_scsi_tape_open()
4541 	STp->nbr_waits = STp->nbr_finished = 0;  in __os_scsi_tape_open()
4547 	SRpnt = osst_do_scsi(NULL, STp, cmd, 0, DMA_NONE, STp->timeout, MAX_RETRIES, 1);  in __os_scsi_tape_open()
4549 		retval = (STp->buffer)->syscall_result;		/* FIXME - valid? */  in __os_scsi_tape_open()
4567 			SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE,  in __os_scsi_tape_open()
4568 					     STp->timeout, MAX_RETRIES, 1);  in __os_scsi_tape_open()
4570 		osst_wait_ready(STp, &SRpnt, (SRpnt->sense[13]==1?15:3) * 60, 0);  in __os_scsi_tape_open()
4577 		STp->header_ok = 0;  in __os_scsi_tape_open()
4584 			SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE,  in __os_scsi_tape_open()
4585 					     STp->timeout, MAX_RETRIES, 1);  in __os_scsi_tape_open()
4591 		STp->pos_unknown = 0;  in __os_scsi_tape_open()
4592 		STp->partition = STp->new_partition = 0;  in __os_scsi_tape_open()
4593 		if (STp->can_partitions)  in __os_scsi_tape_open()
4594 			STp->nbr_partitions = 1;  /* This guess will be updated later if necessary */  in __os_scsi_tape_open()
4596 			STps = &(STp->ps[i]);  in __os_scsi_tape_open()
4605 		STp->recover_count = 0;  in __os_scsi_tape_open()
4606 		STp->abort_count = 0;  in __os_scsi_tape_open()
4612 	if (!STp->buffer->syscall_result && STp->header_ok &&  in __os_scsi_tape_open()
4621 		SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_FROM_DEVICE, STp->timeout, 0, 1);  in __os_scsi_tape_open()
4623 		if (STp->buffer->syscall_result                     ||  in __os_scsi_tape_open()
4624 		    STp->buffer->b_data[MODE_HEADER_LENGTH + 2] != 'L' ||  in __os_scsi_tape_open()
4625 		    STp->buffer->b_data[MODE_HEADER_LENGTH + 3] != 'I' ||  in __os_scsi_tape_open()
4626 		    STp->buffer->b_data[MODE_HEADER_LENGTH + 4] != 'N' ||  in __os_scsi_tape_open()
4627 		    STp->buffer->b_data[MODE_HEADER_LENGTH + 5] != '4'  ) {  in __os_scsi_tape_open()
4630 			  STp->buffer->b_data[MODE_HEADER_LENGTH + 2],  in __os_scsi_tape_open()
4631 			  STp->buffer->b_data[MODE_HEADER_LENGTH + 3],  in __os_scsi_tape_open()
4632 			  STp->buffer->b_data[MODE_HEADER_LENGTH + 4],  in __os_scsi_tape_open()
4633 			  STp->buffer->b_data[MODE_HEADER_LENGTH + 5]);  in __os_scsi_tape_open()
4635 			STp->header_ok = 0;  in __os_scsi_tape_open()
4637 		i = STp->first_frame_position;  in __os_scsi_tape_open()
4638 		if (STp->header_ok && i == osst_get_frame_position(STp, &SRpnt)) {  in __os_scsi_tape_open()
4639 			if (STp->door_locked == ST_UNLOCKED) {  in __os_scsi_tape_open()
4640 				if (do_door_lock(STp, 1))  in __os_scsi_tape_open()
4643 					STp->door_locked = ST_LOCKED_AUTO;  in __os_scsi_tape_open()
4645 			if (!STp->frame_in_buffer) {  in __os_scsi_tape_open()
4646 				STp->block_size = (STm->default_blksize > 0) ?  in __os_scsi_tape_open()
4648 				STp->buffer->buffer_bytes = STp->buffer->read_pointer = 0;  in __os_scsi_tape_open()
4650 			STp->buffer->buffer_blocks = OS_DATA_SIZE / STp->block_size;  in __os_scsi_tape_open()
4651 			STp->fast_open = 1;  in __os_scsi_tape_open()
4656 		if (i != STp->first_frame_position)  in __os_scsi_tape_open()
4658 						name, i, STp->first_frame_position);  in __os_scsi_tape_open()
4660 		STp->header_ok = 0;  in __os_scsi_tape_open()
4662 	STp->fast_open = 0;  in __os_scsi_tape_open()
4664 	if ((STp->buffer)->syscall_result != 0 &&   /* in all error conditions except no medium */   in __os_scsi_tape_open()
4672 		(STp->buffer)->b_data[0] = cmd[4] - 1;  in __os_scsi_tape_open()
4673 		(STp->buffer)->b_data[1] = 0;			/* Medium Type - ignoring */  in __os_scsi_tape_open()
4674 		(STp->buffer)->b_data[2] = 0;			/* Reserved */  in __os_scsi_tape_open()
4675 		(STp->buffer)->b_data[3] = 0;			/* Block Descriptor Length */  in __os_scsi_tape_open()
4676 		(STp->buffer)->b_data[MODE_HEADER_LENGTH + 0] = 0x3f;  in __os_scsi_tape_open()
4677 		(STp->buffer)->b_data[MODE_HEADER_LENGTH + 1] = 1;  in __os_scsi_tape_open()
4678 		(STp->buffer)->b_data[MODE_HEADER_LENGTH + 2] = 2;  in __os_scsi_tape_open()
4679 		(STp->buffer)->b_data[MODE_HEADER_LENGTH + 3] = 3;  in __os_scsi_tape_open()
4684 		SRpnt = osst_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_TO_DEVICE, STp->timeout, 0, 1);  in __os_scsi_tape_open()
4686 		STp->header_ok = 0;  in __os_scsi_tape_open()
4693 			SRpnt = osst_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE,  in __os_scsi_tape_open()
4694 						    STp->timeout, MAX_RETRIES, 1);  in __os_scsi_tape_open()
4702 				STp->pos_unknown = 0;  in __os_scsi_tape_open()
4703 				STp->partition = STp->new_partition = 0;  in __os_scsi_tape_open()
4704 				if (STp->can_partitions)  in __os_scsi_tape_open()
4705 					STp->nbr_partitions = 1;  /* This guess will be updated later if necessary */  in __os_scsi_tape_open()
4707 					STps = &(STp->ps[j]);  in __os_scsi_tape_open()
4720 	if (osst_wait_ready(STp, &SRpnt, 15 * 60, 0))		/* FIXME - not allowed with NOBLOCK */  in __os_scsi_tape_open()
4723 	if ((STp->buffer)->syscall_result != 0) {  in __os_scsi_tape_open()
4724 		if ((STp->device)->scsi_level >= SCSI_2 &&  in __os_scsi_tape_open()
4728 			STp->ready = ST_NO_TAPE;  in __os_scsi_tape_open()
4730 			STp->ready = ST_NOT_READY;  in __os_scsi_tape_open()
4733 		STp->density = 0;   	/* Clear the erroneous "residue" */  in __os_scsi_tape_open()
4734 		STp->write_prot = 0;  in __os_scsi_tape_open()
4735 		STp->block_size = 0;  in __os_scsi_tape_open()
4736 		STp->ps[0].drv_file = STp->ps[0].drv_block = (-1);  in __os_scsi_tape_open()
4737 		STp->partition = STp->new_partition = 0;  in __os_scsi_tape_open()
4738 		STp->door_locked = ST_UNLOCKED;  in __os_scsi_tape_open()
4742 	osst_configure_onstream(STp, &SRpnt);  in __os_scsi_tape_open()
4744 	STp->block_size = STp->raw ? OS_FRAME_SIZE : (  in __os_scsi_tape_open()
4746 	STp->buffer->buffer_blocks = STp->raw ? 1 : OS_DATA_SIZE / STp->block_size;  in __os_scsi_tape_open()
4747 	STp->buffer->buffer_bytes  =  in __os_scsi_tape_open()
4748 	STp->buffer->read_pointer  =  in __os_scsi_tape_open()
4749 	STp->frame_in_buffer       = 0;  in __os_scsi_tape_open()
4754 		     name, STp->block_size, OS_FRAME_SIZE, (STp->buffer)->buffer_size,  in __os_scsi_tape_open()
4755 		     (STp->buffer)->buffer_blocks);  in __os_scsi_tape_open()
4758 	if (STp->drv_write_prot) {  in __os_scsi_tape_open()
4759 		STp->write_prot = 1;  in __os_scsi_tape_open()
4775 		STp->density_changed = STp->blksize_changed = 0;  in __os_scsi_tape_open()
4776 		STp->compression_changed = 0;  in __os_scsi_tape_open()
4782 	if (STp->door_locked == ST_UNLOCKED) {  in __os_scsi_tape_open()
4783 		 if (do_door_lock(STp, 1))  in __os_scsi_tape_open()
4786 			STp->door_locked = ST_LOCKED_AUTO;  in __os_scsi_tape_open()
4789 	osst_analyze_headers(STp, &SRpnt);  in __os_scsi_tape_open()
4799 	normalize_buffer(STp->buffer);  in __os_scsi_tape_open()
4800 	STp->header_ok = 0;  in __os_scsi_tape_open()
4801 	STp->in_use = 0;  in __os_scsi_tape_open()
4802 	scsi_device_put(STp->device);  in __os_scsi_tape_open()
4824 	struct osst_tape    * STp    = filp->private_data;  in os_scsi_tape_flush()  local
4825 	struct st_modedef   * STm    = &(STp->modes[STp->current_mode]);  in os_scsi_tape_flush()
4826 	struct st_partstat  * STps   = &(STp->ps[STp->partition]);  in os_scsi_tape_flush()
4828 	char		    * name   = tape_name(STp);  in os_scsi_tape_flush()
4833 	if ((STps->rw == ST_WRITING || STp->dirty) && !STp->pos_unknown) {  in os_scsi_tape_flush()
4834 		STp->write_type = OS_WRITE_DATA;  in os_scsi_tape_flush()
4835 		result = osst_flush_write_buffer(STp, &SRpnt);  in os_scsi_tape_flush()
4839 	if ( STps->rw >= ST_WRITING && !STp->pos_unknown) {  in os_scsi_tape_flush()
4846 					       name, STp->nbr_waits, STp->nbr_finished);  in os_scsi_tape_flush()
4849 		result = osst_write_trailer(STp, &SRpnt, !(STp->rew_at_close));  in os_scsi_tape_flush()
4853 					       name, 1+STp->two_fm);  in os_scsi_tape_flush()
4856 	else if (!STp->rew_at_close) {  in os_scsi_tape_flush()
4857 		STps = &(STp->ps[STp->partition]);  in os_scsi_tape_flush()
4859 			if (STp->can_bsr)  in os_scsi_tape_flush()
4860 				result = osst_flush_buffer(STp, &SRpnt, 0); /* this is the default path */  in os_scsi_tape_flush()
4862 				result = cross_eof(STp, &SRpnt, 0);  in os_scsi_tape_flush()
4874 			  !(result = cross_eof(STp, &SRpnt, 1))) ||  in os_scsi_tape_flush()
4884 	if (STp->rew_at_close) {  in os_scsi_tape_flush()
4885 		result2 = osst_position_tape_and_confirm(STp, &SRpnt, STp->first_data_ppos);  in os_scsi_tape_flush()
4886 		STps->drv_file = STps->drv_block = STp->frame_seq_number = STp->logical_blk_num = 0;  in os_scsi_tape_flush()
4892 	if (STp->abort_count || STp->recover_count) {  in os_scsi_tape_flush()
4894 		if (STp->abort_count)  in os_scsi_tape_flush()
4895 			printk(" %d unrecovered errors", STp->abort_count);  in os_scsi_tape_flush()
4896 		if (STp->recover_count)  in os_scsi_tape_flush()
4897 			printk(" %d recovered errors", STp->recover_count);  in os_scsi_tape_flush()
4898 		if (STp->write_count)  in os_scsi_tape_flush()
4899 			printk(" in %d frames written", STp->write_count);  in os_scsi_tape_flush()
4900 		if (STp->read_count)  in os_scsi_tape_flush()
4901 			printk(" in %d frames read", STp->read_count);  in os_scsi_tape_flush()
4903 		STp->recover_count = 0;  in os_scsi_tape_flush()
4904 		STp->abort_count   = 0;  in os_scsi_tape_flush()
4906 	STp->write_count = 0;  in os_scsi_tape_flush()
4907 	STp->read_count  = 0;  in os_scsi_tape_flush()
4917 	struct osst_tape    * STp    = filp->private_data;  in os_scsi_tape_close()  local
4919 	if (STp->door_locked == ST_LOCKED_AUTO)  in os_scsi_tape_close()
4920 		do_door_lock(STp, 0);  in os_scsi_tape_close()
4922 	if (STp->raw)  in os_scsi_tape_close()
4923 		STp->header_ok = 0;  in os_scsi_tape_close()
4925 	normalize_buffer(STp->buffer);  in os_scsi_tape_close()
4927 	STp->in_use = 0;  in os_scsi_tape_close()
4930 	scsi_device_put(STp->device);  in os_scsi_tape_close()
4944 	struct osst_tape    * STp   = file->private_data;  in osst_ioctl()  local
4945 	char		    * name  = tape_name(STp);  in osst_ioctl()
4949 	if (mutex_lock_interruptible(&STp->lock)) {  in osst_ioctl()
4955 	if (debugging && !STp->in_use) {  in osst_ioctl()
4961 	STm = &(STp->modes[STp->current_mode]);  in osst_ioctl()
4962 	STps = &(STp->ps[STp->partition]);  in osst_ioctl()
4970 	if( !scsi_block_when_processing_errors(STp->device) ) {  in osst_ioctl()
4979 			    cmd_type, cmd_nr, STp->raw?"raw":"normal");  in osst_ioctl()
5007 		if (!STp->pos_unknown) {  in osst_ioctl()
5024 				i = !STp->can_partitions || (STp->new_partition != STp->partition);  in osst_ioctl()
5034 			i = osst_flush_buffer(STp, &SRpnt, i);  in osst_ioctl()
5055 			reset_state(STp);  in osst_ioctl()
5057 			STp->device->was_reset = 0;  in osst_ioctl()
5075 					STp->first_frame_position, STp->eod_frame_ppos, STp->frame_seq_number,  in osst_ioctl()
5076 					STp->logical_blk_num, STps->drv_file, STps->drv_block );  in osst_ioctl()
5078 			if (STps->rw >= ST_WRITING && STp->first_frame_position >= STp->eod_frame_ppos) {  in osst_ioctl()
5079 				auto_weof = ((STp->write_type != OS_WRITE_NEW_MARK) &&  in osst_ioctl()
5081 				i = osst_write_trailer(STp, &SRpnt,  in osst_ioctl()
5085 						name, auto_weof, STp->first_frame_position, STp->eod_frame_ppos,  in osst_ioctl()
5086 						STp->frame_seq_number, STp->logical_blk_num, STps->drv_file, STps->drv_block );  in osst_ioctl()
5096 		if (mtc.mt_op == MTOFFL && STp->door_locked != ST_UNLOCKED)  in osst_ioctl()
5097 			do_door_lock(STp, 0);  /* Ignore result! */  in osst_ioctl()
5101 			retval = osst_set_options(STp, mtc.mt_count);  in osst_ioctl()
5106 			if (mtc.mt_count >= STp->nbr_partitions)  in osst_ioctl()
5109 				STp->new_partition = mtc.mt_count;  in osst_ioctl()
5116 			if (!STp->can_partitions) {  in osst_ioctl()
5120 			if ((i = osst_int_ioctl(STp, &SRpnt, MTREW, 0)) < 0 /*||  in osst_ioctl()
5126 				STp->ps[i].rw = ST_IDLE;  in osst_ioctl()
5127 				STp->ps[i].at_sm = 0;  in osst_ioctl()
5128 				STp->ps[i].last_block_valid = 0;  in osst_ioctl()
5130 			STp->partition = STp->new_partition = 0;  in osst_ioctl()
5131 			STp->nbr_partitions = 1;  /* Bad guess ?-) */  in osst_ioctl()
5138 			if (STp->raw)  in osst_ioctl()
5139 				i = osst_set_frame_position(STp, &SRpnt, mtc.mt_count, 0);  in osst_ioctl()
5141 				i = osst_seek_sector(STp, &SRpnt, mtc.mt_count);  in osst_ioctl()
5142 			if (!STp->can_partitions)  in osst_ioctl()
5143 				STp->ps[0].rw = ST_IDLE;  in osst_ioctl()
5149 			retval = do_door_lock(STp, (mtc.mt_op == MTLOCK));  in osst_ioctl()
5154 			cross_eof(STp, &SRpnt, 0);  in osst_ioctl()
5161 			retval = osst_int_ioctl(STp, &SRpnt, mtc.mt_op, mtc.mt_count);  in osst_ioctl()
5170 	if ((i = osst_flush_buffer(STp, &SRpnt, 0)) < 0) {  in osst_ioctl()
5184 		mt_status.mt_erreg = STp->recover_erreg << MT_ST_SOFTERR_SHIFT;  in osst_ioctl()
5186 			((STp->block_size << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK) |  in osst_ioctl()
5187 			((STp->density    << MT_ST_DENSITY_SHIFT) & MT_ST_DENSITY_MASK);  in osst_ioctl()
5190 		if (STp->block_size != 0) {  in osst_ioctl()
5192 				mt_status.mt_blkno += (STp->buffer)->buffer_bytes / STp->block_size;  in osst_ioctl()
5194 				mt_status.mt_blkno -= ((STp->buffer)->buffer_bytes +  in osst_ioctl()
5195 							STp->block_size - 1) / STp->block_size;  in osst_ioctl()
5199 		if (STp->drv_write_prot)  in osst_ioctl()
5207 		mt_status.mt_resid = STp->partition;  in osst_ioctl()
5212 		if (STp->density == 1)  in osst_ioctl()
5214 		else if (STp->density == 2)  in osst_ioctl()
5216 		else if (STp->density == 3)  in osst_ioctl()
5218 		if (STp->ready == ST_READY)  in osst_ioctl()
5220 		if (STp->ready == ST_NO_TAPE)  in osst_ioctl()
5224 		if (STm->do_async_writes || (STm->do_buffer_writes && STp->block_size != 0) ||  in osst_ioctl()
5225 		    STp->drv_buffer != 0)  in osst_ioctl()
5234 		STp->recover_erreg = 0;  /* Clear after read */  in osst_ioctl()
5246 		if (STp->raw)  in osst_ioctl()
5247 			blk = osst_get_frame_position(STp, &SRpnt);  in osst_ioctl()
5249 			blk = osst_get_sector(STp, &SRpnt);  in osst_ioctl()
5262 	mutex_unlock(&STp->lock);  in osst_ioctl()
5264 	retval = scsi_ioctl(STp->device, cmd_in, p);  in osst_ioctl()
5271 	mutex_unlock(&STp->lock);  in osst_ioctl()
5280 	struct osst_tape *STp = file->private_data;  in osst_compat_ioctl()  local
5281 	struct scsi_device *sdev = STp->device;  in osst_compat_ioctl()
5690 	struct osst_tape * STp = (struct osst_tape *) dev_get_drvdata (dev);  in osst_adr_rev_show()  local
5693 	if (STp && STp->header_ok && STp->linux_media)  in osst_adr_rev_show()
5694 …l = snprintf(buf, PAGE_SIZE, "%d.%d\n", STp->header_cache->major_rev, STp->header_cache->minor_rev…  in osst_adr_rev_show()
5704 	struct osst_tape * STp = (struct osst_tape *) dev_get_drvdata (dev);  in osst_linux_media_version_show()  local
5707 	if (STp && STp->header_ok && STp->linux_media)  in osst_linux_media_version_show()
5708 		l = snprintf(buf, PAGE_SIZE, "LIN%d\n", STp->linux_media_version);  in osst_linux_media_version_show()
5717 	struct osst_tape * STp = (struct osst_tape *) dev_get_drvdata (dev);  in osst_capacity_show()  local
5720 	if (STp && STp->header_ok && STp->linux_media)  in osst_capacity_show()
5721 		l = snprintf(buf, PAGE_SIZE, "%d\n", STp->capacity);  in osst_capacity_show()
5731 	struct osst_tape * STp = (struct osst_tape *) dev_get_drvdata (dev);  in osst_first_data_ppos_show()  local
5734 	if (STp && STp->header_ok && STp->linux_media)  in osst_first_data_ppos_show()
5735 		l = snprintf(buf, PAGE_SIZE, "%d\n", STp->first_data_ppos);  in osst_first_data_ppos_show()
5745 	struct osst_tape * STp = (struct osst_tape *) dev_get_drvdata (dev);  in osst_eod_frame_ppos_show()  local
5748 	if (STp && STp->header_ok && STp->linux_media)  in osst_eod_frame_ppos_show()
5749 		l = snprintf(buf, PAGE_SIZE, "%d\n", STp->eod_frame_ppos);  in osst_eod_frame_ppos_show()
5758 	struct osst_tape * STp = (struct osst_tape *) dev_get_drvdata (dev);  in osst_filemark_cnt_show()  local
5761 	if (STp && STp->header_ok && STp->linux_media)  in osst_filemark_cnt_show()
5762 		l = snprintf(buf, PAGE_SIZE, "%d\n", STp->filemark_cnt);  in osst_filemark_cnt_show()
5786 static int osst_sysfs_add(dev_t dev, struct device *device, struct osst_tape * STp, char * name)  in osst_sysfs_add()  argument
5791 	osst_member = device_create(osst_sysfs_class, device, dev, STp,  in osst_sysfs_add()
6070 	struct osst_tape * STp;  in exit_osst()  local
6079 			if (!(STp = os_scsi_tapes[i])) continue;  in exit_osst()
6081 			vfree(STp->header_cache);  in exit_osst()
6082 			if (STp->buffer) {  in exit_osst()
6083 				normalize_buffer(STp->buffer);  in exit_osst()
6084 				kfree(STp->buffer);  in exit_osst()
6086 			put_disk(STp->drive);  in exit_osst()
6087 			kfree(STp);  in exit_osst()