diff options
| author | Joe Thornber <ejt@redhat.com> | 2015-04-16 12:47:21 +0100 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2015-06-11 17:13:03 -0400 |
| commit | a5d895a90bf57e5fe87edf48dd1852e7292d570d (patch) | |
| tree | 9ac33ffeca4546e80c4975dc41f320b7519661f8 /drivers/md/dm-thin-metadata.h | |
| parent | 4ec331c3ea7ec94f28aa1c62a279cfa1cfe3c91b (diff) | |
dm thin metadata: add dm_thin_find_mapped_range()
Retrieve the next run of contiguously mapped blocks. Useful for working
out where to break up IO.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-thin-metadata.h')
| -rw-r--r-- | drivers/md/dm-thin-metadata.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/md/dm-thin-metadata.h b/drivers/md/dm-thin-metadata.h index fac01a96d303..f11f14095b93 100644 --- a/drivers/md/dm-thin-metadata.h +++ b/drivers/md/dm-thin-metadata.h @@ -147,6 +147,15 @@ 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. */ int dm_pool_alloc_data_block(struct dm_pool_metadata *pmd, dm_block_t *result); |