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authorJoe Thornber <ejt@redhat.com>2012-07-27 15:08:15 +0100
committerAlasdair G Kergon <agk@redhat.com>2012-07-27 15:08:15 +0100
commit12ba58af46e5973822f1cfaaf5f29a2a17a523bf (patch)
tree4641ca8730db9c61a34052cf267765305323b896 /drivers/md/dm-thin-metadata.h
parent310975573ba40ab526b0d76d28225d8d0999d72b (diff)
dm thin metadata: introduce dm_pool_metadata_set_read_only
Introduce dm_pool_metadata_set_read_only to put the underlying block manager into read-only mode. 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/dm-thin-metadata.h')
-rw-r--r--drivers/md/dm-thin-metadata.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/md/dm-thin-metadata.h b/drivers/md/dm-thin-metadata.h
index 1632fec1660..2bbe622f299 100644
--- a/drivers/md/dm-thin-metadata.h
+++ b/drivers/md/dm-thin-metadata.h
@@ -174,6 +174,12 @@ int dm_pool_get_data_dev_size(struct dm_pool_metadata *pmd, dm_block_t *result);
*/
int dm_pool_resize_data_dev(struct dm_pool_metadata *pmd, dm_block_t new_size);
+/*
+ * Flicks the underlying block manager into read only mode, so you know
+ * that nothing is changing.
+ */
+void dm_pool_metadata_read_only(struct dm_pool_metadata *pmd);
+
/*----------------------------------------------------------------*/
#endif