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authorJoe Thornber <ejt@redhat.com>2012-07-27 15:08:07 +0100
committerAlasdair G Kergon <agk@redhat.com>2012-07-27 15:08:07 +0100
commit0e9c24ed7443d090e369a2eddfa13f7f0b5afbaf (patch)
tree707aed84bf17ee82bb32bb26e776b97afb3493fe /drivers/md
parentf4b90369d3a9ffe0f48f373c566578c142e95bf2 (diff)
downloadlinux-0e9c24ed7443d090e369a2eddfa13f7f0b5afbaf.tar.bz2
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 'drivers/md')
-rw-r--r--drivers/md/dm-table.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 2e227fbf1622..f90069029aae 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -1319,6 +1319,9 @@ static bool dm_table_supports_flush(struct dm_table *t, unsigned flush)
if (!ti->num_flush_requests)
continue;
+ if (ti->flush_supported)
+ return 1;
+
if (ti->type->iterate_devices &&
ti->type->iterate_devices(ti, device_flush_capable, &flush))
return 1;