These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / md / dm-thin-metadata.h

diff --git a/kernel/drivers/md/dm-thin-metadata.h b/kernel/drivers/md/dm-thin-metadata.h
index fac01a9..a938bab 100644 (file)
--- 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.