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authorMike Snitzer <snitzer@redhat.com>2013-03-20 17:21:27 +0000
committerAlasdair G Kergon <agk@redhat.com>2013-03-20 17:21:27 +0000
commit4e7f506f6429636115e2f58f9f97089acc62524a (patch)
tree8758ebd6ee210ec303b661df775f31b3e9f45dd9 /drivers/md/dm-cache-policy-internal.h
parente2e74d617eadc15f601983270c4f4a6935c5a943 (diff)
downloadlinux-next-4e7f506f6429636115e2f58f9f97089acc62524a.tar.gz
dm cache: policy change version from string to integer set
Separate dm cache policy version string into 3 unsigned numbers corresponding to major, minor and patchlevel and store them at the end of the on-disk metadata so we know which version of the policy generated the hints in case a future version wants to use them differently. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-cache-policy-internal.h')
-rw-r--r--drivers/md/dm-cache-policy-internal.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/dm-cache-policy-internal.h b/drivers/md/dm-cache-policy-internal.h
index 52a75beeced5..0928abdc49f0 100644
--- a/drivers/md/dm-cache-policy-internal.h
+++ b/drivers/md/dm-cache-policy-internal.h
@@ -117,6 +117,8 @@ void dm_cache_policy_destroy(struct dm_cache_policy *p);
*/
const char *dm_cache_policy_get_name(struct dm_cache_policy *p);
+const unsigned *dm_cache_policy_get_version(struct dm_cache_policy *p);
+
size_t dm_cache_policy_get_hint_size(struct dm_cache_policy *p);
/*----------------------------------------------------------------*/