dm thin: detect metadata device resizing

[karo-tx-linux.git] / drivers / md / dm-thin-metadata.c

diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c
index 9452a489ed999d765211579c3d93fc4f4f8f8c91..f553ed66603c57efc1135c658ace9e149804ff1a 100644 (file)
--- a/drivers/md/dm-thin-metadata.c
+++ b/drivers/md/dm-thin-metadata.c
@@ -1677,6 +1677,18 @@ int dm_pool_resize_data_dev(struct dm_pool_metadata *pmd, dm_block_t new_count)
        return r;
 }
 
+int dm_pool_resize_metadata_dev(struct dm_pool_metadata *pmd, dm_block_t new_count)
+{
+       int r = -EINVAL;
+
+       down_write(&pmd->root_lock);
+       if (!pmd->fail_io)
+               r = __resize_space_map(pmd->metadata_sm, new_count);
+       up_write(&pmd->root_lock);
+
+       return r;
+}
+
 void dm_pool_metadata_read_only(struct dm_pool_metadata *pmd)
 {
        down_write(&pmd->root_lock);