1 files changed, 40 insertions, 2 deletions

diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index db1b041ce975..37fdaf81bd1f 100644
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -2284,6 +2284,36 @@ static int process_set_transaction_id_mesg(unsigned argc, char **argv, struct po
         return 0;
 }
 
+static int process_reserve_metadata_snap_mesg(unsigned argc, char **argv, struct pool *pool)
+{
+        int r;
+
+        r = check_arg_count(argc, 1);
+        if (r)
+                return r;
+
+        r = dm_pool_reserve_metadata_snap(pool->pmd);
+        if (r)
+                DMWARN("reserve_metadata_snap message failed.");
+
+        return r;
+}
+
+static int process_release_metadata_snap_mesg(unsigned argc, char **argv, struct pool *pool)
+{
+        int r;
+
+        r = check_arg_count(argc, 1);
+        if (r)
+                return r;
+
+        r = dm_pool_release_metadata_snap(pool->pmd);
+        if (r)
+                DMWARN("release_metadata_snap message failed.");
+
+        return r;
+}
+
 /*
  * Messages supported:
  *   create_thin        <dev_id>
@@ -2291,6 +2321,8 @@ static int process_set_transaction_id_mesg(unsigned argc, char **argv, struct po
  *   delete             <dev_id>
  *   trim               <dev_id> <new_size_in_sectors>
  *   set_transaction_id <current_trans_id> <new_trans_id>
+ *   reserve_metadata_snap
+ *   release_metadata_snap
  */
 static int pool_message(struct dm_target *ti, unsigned argc, char **argv)
 {
@@ -2310,6 +2342,12 @@ static int pool_message(struct dm_target *ti, unsigned argc, char **argv)
         else if (!strcasecmp(argv[0], "set_transaction_id"))
                 r = process_set_transaction_id_mesg(argc, argv, pool);
 
+        else if (!strcasecmp(argv[0], "reserve_metadata_snap"))
+                r = process_reserve_metadata_snap_mesg(argc, argv, pool);
+
+        else if (!strcasecmp(argv[0], "release_metadata_snap"))
+                r = process_release_metadata_snap_mesg(argc, argv, pool);
+
         else
                 DMWARN("Unrecognised thin pool target message received: %s", argv[0]);
 
@@ -2369,7 +2407,7 @@ static int pool_status(struct dm_target *ti, status_type_t type,
                 if (r)
                         return r;
 
-                r = dm_pool_get_held_metadata_root(pool->pmd, &held_root);
+                r = dm_pool_get_metadata_snap(pool->pmd, &held_root);
                 if (r)
                         return r;
 
@@ -2465,7 +2503,7 @@ static struct target_type pool_target = {
         .name = "thin-pool",
         .features = DM_TARGET_SINGLETON | DM_TARGET_ALWAYS_WRITEABLE |
                     DM_TARGET_IMMUTABLE,
-        .version = {1, 1, 0},
+        .version = {1, 2, 0},
         .module = THIS_MODULE,
         .ctr = pool_ctr,
         .dtr = pool_dtr,