thin: use lv_status_thin and lv_status_thin_pool

Introduce structures lv_status_thin_pool and
lv_status_thin  (pair to lv_status_cache, lv_status_vdo)

Convert lv_thin_percent() -> lv_thin_status()
and  lv_thin_pool_percent() + lv_thin_pool_transaction_id() ->
lv_thin_pool_status().

This way a function user can see not only percentages, but also
other important status info about thin-pool.

TODO:
This patch tries to not change too many other things,
but pool_below_threshold() now uses new thin-pool info to return
failure if thin-pool cannot be actually modified.
This should be handle separately in a better way.

1 files changed, 4 insertions, 6 deletions

diff --git a/lib/activate/activate.h b/lib/activate/activate.h
index e3c1bb35e..3f4d128be 100644
--- a/lib/activate/activate.h
+++ b/lib/activate/activate.h
@@ -191,13 +191,11 @@ int lv_raid_message(const struct logical_volume *lv, const char *msg);
 int lv_writecache_message(const struct logical_volume *lv, const char *msg);
 int lv_cache_status(const struct logical_volume *cache_lv,
 		    struct lv_status_cache **status);
-int lv_thin_pool_percent(const struct logical_volume *lv, int metadata,
-			 dm_percent_t *percent);
-int lv_thin_percent(const struct logical_volume *lv, int mapped,
-		    dm_percent_t *percent);
-int lv_thin_pool_transaction_id(const struct logical_volume *lv,
-				uint64_t *transaction_id);
 int lv_thin_device_id(const struct logical_volume *lv, uint32_t *device_id);
+int lv_thin_status(const struct logical_volume *lv, int flush,
+		   struct lv_status_thin **status);
+int lv_thin_pool_status(const struct logical_volume *lv, int flush,
+			struct lv_status_thin_pool **status);
 int lv_vdo_pool_status(const struct logical_volume *lv, int flush,
 		       struct lv_status_vdo **status);
 int lv_vdo_pool_percent(const struct logical_volume *lv, dm_percent_t *percent);