[dm-devel] [PATCH 01/13] dm-zoned: add 'status' and 'message' callbacks
Hannes Reinecke
hare at suse.de
Mon Apr 20 10:08:12 UTC 2020
Add callbacks to supply information for 'dmsetup status'
and 'dmsetup info', and implement the message 'reclaim'
to start the reclaim worker.
Signed-off-by: Hannes Reinecke <hare at suse.de>
Reviewed-by: Bob Liu <bob.liu at oracle.com>
---
drivers/md/dm-zoned-metadata.c | 15 +++++++++++++++
drivers/md/dm-zoned-target.c | 43 ++++++++++++++++++++++++++++++++++++++++++
drivers/md/dm-zoned.h | 3 +++
3 files changed, 61 insertions(+)
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.
diff --git a/drivers/md/dm-zoned-target.c b/drivers/md/dm-zoned-target.c
index f4f83d39b3dc..44e30a7de8b9 100644
--- a/drivers/md/dm-zoned-target.c
+++ b/drivers/md/dm-zoned-target.c
@@ -965,6 +965,47 @@ static int dmz_iterate_devices(struct dm_target *ti,
return fn(ti, dmz->ddev, 0, capacity, data);
}
+static void dmz_status(struct dm_target *ti, status_type_t type,
+ unsigned int status_flags, char *result,
+ unsigned int maxlen)
+{
+ struct dmz_target *dmz = ti->private;
+ ssize_t sz = 0;
+ char buf[BDEVNAME_SIZE];
+
+ switch (type) {
+ case STATUSTYPE_INFO:
+ DMEMIT("%u zones "
+ "%u/%u random "
+ "%u/%u sequential",
+ dmz_nr_zones(dmz->metadata),
+ dmz_nr_unmap_rnd_zones(dmz->metadata),
+ dmz_nr_rnd_zones(dmz->metadata),
+ dmz_nr_unmap_seq_zones(dmz->metadata),
+ dmz_nr_seq_zones(dmz->metadata));
+ break;
+ case STATUSTYPE_TABLE:
+ format_dev_t(buf, dmz->dev->bdev->bd_dev);
+ DMEMIT("%s ", buf);
+ break;
+ }
+ return;
+}
+
+static int dmz_message(struct dm_target *ti, unsigned int argc, char **argv,
+ char *result, unsigned int maxlen)
+{
+ struct dmz_target *dmz = ti->private;
+ int r = -EINVAL;
+
+ if (!strcasecmp(argv[0], "reclaim")) {
+ dmz_schedule_reclaim(dmz->reclaim);
+ r = 0;
+ } else
+ DMERR("unrecognized message %s", argv[0]);
+ return r;
+}
+
static struct target_type dmz_type = {
.name = "zoned",
.version = {1, 1, 0},
@@ -978,6 +1019,8 @@ static struct target_type dmz_type = {
.postsuspend = dmz_suspend,
.resume = dmz_resume,
.iterate_devices = dmz_iterate_devices,
+ .status = dmz_status,
+ .message = dmz_message,
};
static int __init dmz_init(void)
diff --git a/drivers/md/dm-zoned.h b/drivers/md/dm-zoned.h
index 5b5e493d479c..884c0e586082 100644
--- a/drivers/md/dm-zoned.h
+++ b/drivers/md/dm-zoned.h
@@ -190,8 +190,11 @@ void dmz_free_zone(struct dmz_metadata *zmd, struct dm_zone *zone);
void dmz_map_zone(struct dmz_metadata *zmd, struct dm_zone *zone,
unsigned int chunk);
void dmz_unmap_zone(struct dmz_metadata *zmd, struct dm_zone *zone);
+unsigned int dmz_nr_zones(struct dmz_metadata *zmd);
unsigned int dmz_nr_rnd_zones(struct dmz_metadata *zmd);
unsigned int dmz_nr_unmap_rnd_zones(struct dmz_metadata *zmd);
+unsigned int dmz_nr_seq_zones(struct dmz_metadata *zmd);
+unsigned int dmz_nr_unmap_seq_zones(struct dmz_metadata *zmd);
/*
* Activate a zone (increment its reference count).
--
2.16.4
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