zbd: Report the zone capacity

The zone capacity is important information. Hence report the zone
capacity if it is identical for all zones and if ZBD debugging is enabled.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>

Author: bvanassche

zbd.c

@@ -776,7 +776,8 @@ static int parse_zone_info(struct thread_data *td, struct fio_file *f)
 	int nr_zones, nrz;
 	struct zbd_zone *zones, *z;
 	struct fio_zone_info *p;
-	uint64_t zone_size, offset;
+	uint64_t zone_size, offset, capacity;
+	bool same_zone_cap = true;
 	struct zoned_block_device_info *zbd_info = NULL;
 	int i, j, ret = -ENOMEM;
 
@@ -793,6 +794,7 @@ static int parse_zone_info(struct thread_data *td, struct fio_file *f)
 	}
 
 	zone_size = zones[0].len;
+	capacity = zones[0].capacity;
 	nr_zones = (f->real_file_size + zone_size - 1) / zone_size;
 
 	if (td->o.zone_size == 0) {
@@ -821,6 +823,8 @@ static int parse_zone_info(struct thread_data *td, struct fio_file *f)
 						     PTHREAD_MUTEX_RECURSIVE);
 			p->start = z->start;
 			p->capacity = z->capacity;
+			if (capacity != z->capacity)
+				same_zone_cap = false;
 
 			switch (z->cond) {
 			case ZBD_ZONE_COND_NOT_WP:
@@ -876,6 +880,11 @@ static int parse_zone_info(struct thread_data *td, struct fio_file *f)
 	f->zbd_info->zone_size_log2 = is_power_of_2(zone_size) ?
 		ilog2(zone_size) : 0;
 	f->zbd_info->nr_zones = nr_zones;
+
+	if (same_zone_cap)
+		dprint(FD_ZBD, "Zone capacity = %"PRIu64" KB\n",
+		       capacity / 1024);
+
 	zbd_info = NULL;
 	ret = 0;