13 #define DM_MSG_PREFIX "zone"
18  * For internal zone reports bypassing the top BIO submission path.
51  * User facing dm device block device report zone operation. This calls the
76 static int dm_report_zones_cb(struct blk_zone *zone, unsigned int idx,  in dm_report_zones_cb()  argument
85 	if (zone->start >= args->start + args->tgt->len)  in dm_report_zones_cb()
89 	 * Remap the start sector and write pointer position of the zone  in dm_report_zones_cb()
92 	zone->start += sector_diff;  in dm_report_zones_cb()
93 	if (zone->type != BLK_ZONE_TYPE_CONVENTIONAL) {  in dm_report_zones_cb()
94 		if (zone->cond == BLK_ZONE_COND_FULL)  in dm_report_zones_cb()
95 			zone->wp = zone->start + zone->len;  in dm_report_zones_cb()
96 		else if (zone->cond == BLK_ZONE_COND_EMPTY)  in dm_report_zones_cb()
97 			zone->wp = zone->start;  in dm_report_zones_cb()
99 			zone->wp += sector_diff;  in dm_report_zones_cb()
102 	args->next_sector = zone->start + zone->len;  in dm_report_zones_cb()
103 	return args->orig_cb(zone, args->zone_idx++, args->orig_data);  in dm_report_zones_cb()
115 	 * dm_report_zones_cb() can correctly remap zone information.  in dm_report_zones()
157 static unsigned int dm_get_zone_wp_offset(struct blk_zone *zone)  in dm_get_zone_wp_offset()  argument
159 	switch (zone->cond) {  in dm_get_zone_wp_offset()
163 		return zone->wp - zone->start;  in dm_get_zone_wp_offset()
165 		return zone->len;  in dm_get_zone_wp_offset()
173 		 * write pointer. Use 0 as for an empty zone.  in dm_get_zone_wp_offset()
179 static int dm_zone_revalidate_cb(struct blk_zone *zone, unsigned int idx,  in dm_zone_revalidate_cb()  argument
185 	switch (zone->type) {  in dm_zone_revalidate_cb()
212 		md->zwp_offset[idx] = dm_get_zone_wp_offset(zone);  in dm_zone_revalidate_cb()
216 		DMERR("Invalid zone type 0x%x at sectors %llu",  in dm_zone_revalidate_cb()
217 		      (int)zone->type, zone->start);  in dm_zone_revalidate_cb()
226  * for zone append emulation. Note that we cannot simply use the block layer
307 	/* Check if zone append is natively supported */  in dm_set_zones_restrictions()
315 	 * Mark the mapped device as needing zone append emulation and  in dm_set_zones_restrictions()
325 static int dm_update_zone_wp_offset_cb(struct blk_zone *zone, unsigned int idx,  in dm_update_zone_wp_offset_cb()  argument
330 	*wp_offset = dm_get_zone_wp_offset(zone);  in dm_update_zone_wp_offset_cb()
365  * First phase of BIO mapping for targets with zone append emulation:
366  * check all BIO that change a zone writer pointer and change zone
377 	 * If the target zone is in an error state, recover by inspecting the  in dm_zone_map_bio_begin()
378 	 * zone to get its current write pointer position. Note that since the  in dm_zone_map_bio_begin()
379 	 * target zone is already locked, a BIO issuing context should never  in dm_zone_map_bio_begin()
380 	 * see the zone write in the DM_ZONE_UPDATING_WP_OFST state.  in dm_zone_map_bio_begin()
395 		/* Writes must be aligned to the zone write pointer */  in dm_zone_map_bio_begin()
401 		 * Change zone append operations into a non-mergeable regular  in dm_zone_map_bio_begin()
403 		 * target zone.  in dm_zone_map_bio_begin()
415 	/* Cannot write to a full zone */  in dm_zone_map_bio_begin()
423  * Second phase of BIO mapping for targets with zone append emulation:
424  * update the zone write pointer offset array to account for the additional
425  * data written to a zone. Note that at this point, the remapped clone BIO
439 	/* Update the zone wp offset */  in dm_zone_map_bio_end()
456 		 * emulating a zone append.  in dm_zone_map_bio_end()
459 			DMWARN_LIMIT("Truncated write for zone append");  in dm_zone_map_bio_end()
498 	 * zone write lock, that is, all operations that target conventional  in dm_need_zone_wp_tracking()
500 	 * zone write pointer.  in dm_need_zone_wp_tracking()
518  * Special IO mapping for targets needing zone append emulation.
533 	 * IOs that do not change a zone write pointer do not need  in dm_zone_map_bio()
539 	/* Lock the target zone */  in dm_zone_map_bio()
544 	 * Check that the bio and the target zone write pointer offset are  in dm_zone_map_bio()
545 	 * both valid, and if the bio is a zone append, remap it to a write.  in dm_zone_map_bio()
564 		 * The target submitted the clone BIO. The target zone will  in dm_zone_map_bio()
572 		 * unlock the target zone here as the clone will not be  in dm_zone_map_bio()
608 	 * For targets that do not emulate zone append, we only need to  in dm_zone_endio()
609 	 * handle native zone-append bios.  in dm_zone_endio()
613 		 * Get the offset within the zone of the written sector  in dm_zone_endio()
628 	 * For targets that do emulate zone append, if the clone BIO does not  in dm_zone_endio()
629 	 * own the target zone write lock, we have nothing to do.  in dm_zone_endio()
638 		 * BIOs that modify a zone write pointer may leave the zone  in dm_zone_endio()
641 		 * the target zone write pointer as invalid unless it is  in dm_zone_endio()
647 		 * Get the written sector for zone append operation that were  in dm_zone_endio()