14 #define DM_MSG_PREFIX "zone"
19  * For internal zone reports bypassing the top BIO submission path.
52  * User facing dm device block device report zone operation. This calls the
77 static int dm_report_zones_cb(struct blk_zone *zone, unsigned int idx,  in dm_report_zones_cb()  argument
86 	if (zone->start >= args->start + args->tgt->len)  in dm_report_zones_cb()
90 	 * Remap the start sector and write pointer position of the zone  in dm_report_zones_cb()
93 	zone->start += sector_diff;  in dm_report_zones_cb()
94 	if (zone->type != BLK_ZONE_TYPE_CONVENTIONAL) {  in dm_report_zones_cb()
95 		if (zone->cond == BLK_ZONE_COND_FULL)  in dm_report_zones_cb()
96 			zone->wp = zone->start + zone->len;  in dm_report_zones_cb()
97 		else if (zone->cond == BLK_ZONE_COND_EMPTY)  in dm_report_zones_cb()
98 			zone->wp = zone->start;  in dm_report_zones_cb()
100 			zone->wp += sector_diff;  in dm_report_zones_cb()
103 	args->next_sector = zone->start + zone->len;  in dm_report_zones_cb()
104 	return args->orig_cb(zone, args->zone_idx++, args->orig_data);  in dm_report_zones_cb()
116 	 * dm_report_zones_cb() can correctly remap zone information.  in dm_report_zones()
155 static unsigned int dm_get_zone_wp_offset(struct blk_zone *zone)  in dm_get_zone_wp_offset()  argument
157 	switch (zone->cond) {  in dm_get_zone_wp_offset()
161 		return zone->wp - zone->start;  in dm_get_zone_wp_offset()
163 		return zone->len;  in dm_get_zone_wp_offset()
171 		 * write pointer. Use 0 as for an empty zone.  in dm_get_zone_wp_offset()
177 static int dm_zone_revalidate_cb(struct blk_zone *zone, unsigned int idx,  in dm_zone_revalidate_cb()  argument
183 	switch (zone->type) {  in dm_zone_revalidate_cb()
208 		md->zwp_offset[idx] = dm_get_zone_wp_offset(zone);  in dm_zone_revalidate_cb()
212 		DMERR("Invalid zone type 0x%x at sectors %llu",  in dm_zone_revalidate_cb()
213 		      (int)zone->type, zone->start);  in dm_zone_revalidate_cb()
222  * for zone append emulation. Note that we cannot simply use the block layer
300 	/* Check if zone append is natively supported */  in dm_set_zones_restrictions()
308 	 * Mark the mapped device as needing zone append emulation and  in dm_set_zones_restrictions()
318 static int dm_update_zone_wp_offset_cb(struct blk_zone *zone, unsigned int idx,  in dm_update_zone_wp_offset_cb()  argument
323 	*wp_offset = dm_get_zone_wp_offset(zone);  in dm_update_zone_wp_offset_cb()
363  * First phase of BIO mapping for targets with zone append emulation:
364  * check all BIO that change a zone writer pointer and change zone
374 	 * If the target zone is in an error state, recover by inspecting the  in dm_zone_map_bio_begin()
375 	 * zone to get its current write pointer position. Note that since the  in dm_zone_map_bio_begin()
376 	 * target zone is already locked, a BIO issuing context should never  in dm_zone_map_bio_begin()
377 	 * see the zone write in the DM_ZONE_UPDATING_WP_OFST state.  in dm_zone_map_bio_begin()
391 		/* Writes must be aligned to the zone write pointer */  in dm_zone_map_bio_begin()
397 		 * Change zone append operations into a non-mergeable regular  in dm_zone_map_bio_begin()
399 		 * target zone.  in dm_zone_map_bio_begin()
410 	/* Cannot write to a full zone */  in dm_zone_map_bio_begin()
418  * Second phase of BIO mapping for targets with zone append emulation:
419  * update the zone write pointer offset array to account for the additional
420  * data written to a zone. Note that at this point, the remapped clone BIO
433 	/* Update the zone wp offset */  in dm_zone_map_bio_end()
449 		 * emulating a zone append.  in dm_zone_map_bio_end()
452 			DMWARN_LIMIT("Truncated write for zone append");  in dm_zone_map_bio_end()
491 	 * zone write lock, that is, all operations that target conventional  in dm_need_zone_wp_tracking()
493 	 * zone write pointer.  in dm_need_zone_wp_tracking()
510  * Special IO mapping for targets needing zone append emulation.
524 	 * IOs that do not change a zone write pointer do not need  in dm_zone_map_bio()
530 	/* Lock the target zone */  in dm_zone_map_bio()
538 	 * Check that the bio and the target zone write pointer offset are  in dm_zone_map_bio()
539 	 * both valid, and if the bio is a zone append, remap it to a write.  in dm_zone_map_bio()
551 		 * The target submitted the clone BIO. The target zone will  in dm_zone_map_bio()
560 		 * unlock the target zone here as the clone will not be  in dm_zone_map_bio()
594 	 * For targets that do not emulate zone append, we only need to  in dm_zone_endio()
595 	 * handle native zone-append bios.  in dm_zone_endio()
599 		 * Get the offset within the zone of the written sector  in dm_zone_endio()
615 	 * For targets that do emulate zone append, if the clone BIO does not  in dm_zone_endio()
616 	 * own the target zone write lock, we have nothing to do.  in dm_zone_endio()
625 		 * BIOs that modify a zone write pointer may leave the zone  in dm_zone_endio()
628 		 * the target zone write pointer as invalid unless it is  in dm_zone_endio()
634 		 * Get the written sector for zone append operation that were  in dm_zone_endio()