Merge remote-tracking branches 'spi/topic/imx', 'spi/topic/init', 'spi/topic/mpc512x...

[cascardo/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 baa87ff..fb9efc8 100644 (file)
--- a/drivers/md/dm-thin-metadata.c
+++ b/drivers/md/dm-thin-metadata.c
@@ -76,7 +76,7 @@
 
 #define THIN_SUPERBLOCK_MAGIC 27022010
 #define THIN_SUPERBLOCK_LOCATION 0
-#define THIN_VERSION 1
+#define THIN_VERSION 2
 #define THIN_METADATA_CACHE_SIZE 64
 #define SECTOR_TO_BLOCK_SHIFT 3
 
@@ -1755,3 +1755,38 @@ int dm_pool_register_metadata_threshold(struct dm_pool_metadata *pmd,
 
        return r;
 }
+
+int dm_pool_metadata_set_needs_check(struct dm_pool_metadata *pmd)
+{
+       int r;
+       struct dm_block *sblock;
+       struct thin_disk_superblock *disk_super;
+
+       down_write(&pmd->root_lock);
+       pmd->flags |= THIN_METADATA_NEEDS_CHECK_FLAG;
+
+       r = superblock_lock(pmd, &sblock);
+       if (r) {
+               DMERR("couldn't read superblock");
+               goto out;
+       }
+
+       disk_super = dm_block_data(sblock);
+       disk_super->flags = cpu_to_le32(pmd->flags);
+
+       dm_bm_unlock(sblock);
+out:
+       up_write(&pmd->root_lock);
+       return r;
+}
+
+bool dm_pool_metadata_needs_check(struct dm_pool_metadata *pmd)
+{
+       bool needs_check;
+
+       down_read(&pmd->root_lock);
+       needs_check = pmd->flags & THIN_METADATA_NEEDS_CHECK_FLAG;
+       up_read(&pmd->root_lock);
+
+       return needs_check;
+}