X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fmd%2Fdm-thin-metadata.h;h=a938babe4258a79a5bec9f5af75e7c3ac1bb4c04;hb=e09b41010ba33a20a87472ee821fa407a5b8da36;hp=fac01a96d303113b3036071ed8f359c7e5f10224;hpb=f93b97fd65072de626c074dbe099a1fff05ce060;p=kvmfornfv.git

diff --git a/kernel/drivers/md/dm-thin-metadata.h b/kernel/drivers/md/dm-thin-metadata.h
index fac01a96d..a938babe4 100644
--- a/kernel/drivers/md/dm-thin-metadata.h
+++ b/kernel/drivers/md/dm-thin-metadata.h
@@ -146,6 +146,15 @@ struct dm_thin_lookup_result {
 int dm_thin_find_block(struct dm_thin_device *td, dm_block_t block,
 		       int can_issue_io, struct dm_thin_lookup_result *result);
 
+/*
+ * Retrieve the next run of contiguously mapped blocks.  Useful for working
+ * out where to break up IO.  Returns 0 on success, < 0 on error.
+ */
+int dm_thin_find_mapped_range(struct dm_thin_device *td,
+			      dm_block_t begin, dm_block_t end,
+			      dm_block_t *thin_begin, dm_block_t *thin_end,
+			      dm_block_t *pool_begin, bool *maybe_shared);
+
 /*
  * Obtain an unused block.
  */
@@ -158,6 +167,8 @@ int dm_thin_insert_block(struct dm_thin_device *td, dm_block_t block,
 			 dm_block_t data_block);
 
 int dm_thin_remove_block(struct dm_thin_device *td, dm_block_t block);
+int dm_thin_remove_range(struct dm_thin_device *td,
+			 dm_block_t begin, dm_block_t end);
 
 /*
  * Queries.