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[PATCH 3.16.y-ckt 101/130] dm thin metadata: delete btrees when releasing metadata snapshot

Started byLuis Henriques <luis.henriques@canonical.com>
First post2015-09-04 15:20 +0200
Last post2015-09-04 15:20 +0200
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  [PATCH 3.16.y-ckt 101/130] dm thin metadata: delete btrees when releasing metadata snapshot Luis Henriques <luis.henriques@canonical.com> - 2015-09-04 15:20 +0200

#1218946 — [PATCH 3.16.y-ckt 101/130] dm thin metadata: delete btrees when releasing metadata snapshot

FromLuis Henriques <luis.henriques@canonical.com>
Date2015-09-04 15:20 +0200
Subject[PATCH 3.16.y-ckt 101/130] dm thin metadata: delete btrees when releasing metadata snapshot
Message-ID<q4Z4p-39P-77@gated-at.bofh.it>
3.16.7-ckt17 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Joe Thornber <ejt@redhat.com>

commit 7f518ad0a212e2a6fd68630e176af1de395070a7 upstream.

The device details and mapping trees were just being decremented
before.  Now btree_del() is called to do a deep delete.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/md/dm-thin-metadata.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c
index e9d33ad59df5..3412b86e79fd 100644
--- a/drivers/md/dm-thin-metadata.c
+++ b/drivers/md/dm-thin-metadata.c
@@ -1295,8 +1295,8 @@ static int __release_metadata_snap(struct dm_pool_metadata *pmd)
 		return r;
 
 	disk_super = dm_block_data(copy);
-	dm_sm_dec_block(pmd->metadata_sm, le64_to_cpu(disk_super->data_mapping_root));
-	dm_sm_dec_block(pmd->metadata_sm, le64_to_cpu(disk_super->device_details_root));
+	dm_btree_del(&pmd->info, le64_to_cpu(disk_super->data_mapping_root));
+	dm_btree_del(&pmd->details_info, le64_to_cpu(disk_super->device_details_root));
 	dm_sm_dec_block(pmd->metadata_sm, held_root);
 
 	return dm_tm_unlock(pmd->tm, copy);
--
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