From bc3d5717d242a37d2e9ea85d7e7b2e3569324d24 Mon Sep 17 00:00:00 2001
From: Hannes Reinecke <hare@suse.de>
Date: Mon, 11 May 2020 10:24:16 +0200
Subject: dm zoned: add 'status' callback

Add callback to supply information for 'dmsetup status'
and 'dmsetup table'. The output for 'dmsetup status' is

0 <size> zoned <nr_zones> zones <nr_unmap_rnd>/<nr_rnd> random <nr_unmap_seq>/<nr_seq> sequential

where <nr_unmap_rnd> is the number of unmapped (ie free) random zones,
<nr_rnd> the total number of random zones, <nr_unmap_seq> the number
of unmapped sequential zones, and <nr_seq> the total number of
sequential zones.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Bob Liu <bob.liu@oracle.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
---
 drivers/md/dm-zoned-metadata.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'drivers/md/dm-zoned-metadata.c')

diff --git a/drivers/md/dm-zoned-metadata.c b/drivers/md/dm-zoned-metadata.c
index 369de15c4e80..c8787560fa9f 100644
--- a/drivers/md/dm-zoned-metadata.c
+++ b/drivers/md/dm-zoned-metadata.c
@@ -202,6 +202,11 @@ sector_t dmz_start_block(struct dmz_metadata *zmd, struct dm_zone *zone)
 	return (sector_t)dmz_id(zmd, zone) << zmd->dev->zone_nr_blocks_shift;
 }
 
+unsigned int dmz_nr_zones(struct dmz_metadata *zmd)
+{
+	return zmd->dev->nr_zones;
+}
+
 unsigned int dmz_nr_chunks(struct dmz_metadata *zmd)
 {
 	return zmd->nr_chunks;
@@ -217,6 +222,16 @@ unsigned int dmz_nr_unmap_rnd_zones(struct dmz_metadata *zmd)
 	return atomic_read(&zmd->unmap_nr_rnd);
 }
 
+unsigned int dmz_nr_seq_zones(struct dmz_metadata *zmd)
+{
+	return zmd->nr_seq;
+}
+
+unsigned int dmz_nr_unmap_seq_zones(struct dmz_metadata *zmd)
+{
+	return atomic_read(&zmd->unmap_nr_seq);
+}
+
 /*
  * Lock/unlock mapping table.
  * The map lock also protects all the zone lists.
-- 
cgit