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authorJoe Thornber <ejt@redhat.com>2012-07-27 18:08:07 +0400
committerAlasdair G Kergon <agk@redhat.com>2012-07-27 18:08:07 +0400
commit0e9c24ed7443d090e369a2eddfa13f7f0b5afbaf (patch)
tree707aed84bf17ee82bb32bb26e776b97afb3493fe /include
parentf4b90369d3a9ffe0f48f373c566578c142e95bf2 (diff)
downloadlinux-0e9c24ed7443d090e369a2eddfa13f7f0b5afbaf.tar.xz
dm: allow targets to request flushes regardless of underlying device support
Allow targets to override the 'supports flush' calculation. Set 'flush_supported' if a target needs to receive flushes regardless of whether or not its underlying devices have support. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/device-mapper.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 8bdbbfce759a..bdd65e97a129 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -212,6 +212,12 @@ struct dm_target {
char *error;
/*
+ * Set if this target needs to receive flushes regardless of
+ * whether or not its underlying devices have support.
+ */
+ bool flush_supported:1;
+
+ /*
* Set if this target needs to receive discards regardless of
* whether or not its underlying devices have support.
*/