diff options
Diffstat (limited to 'drivers/md/persistent-data/dm-transaction-manager.c')
| -rw-r--r-- | drivers/md/persistent-data/dm-transaction-manager.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/md/persistent-data/dm-transaction-manager.c b/drivers/md/persistent-data/dm-transaction-manager.c index abe2c5dd0993..4353e1146d73 100644 --- a/drivers/md/persistent-data/dm-transaction-manager.c +++ b/drivers/md/persistent-data/dm-transaction-manager.c @@ -379,6 +379,15 @@ int dm_tm_ref(struct dm_transaction_manager *tm, dm_block_t b, return dm_sm_get_count(tm->sm, b, result); } +int dm_tm_block_is_shared(struct dm_transaction_manager *tm, dm_block_t b, + int *result) +{ + if (tm->is_clone) + return -EWOULDBLOCK; + + return dm_sm_count_is_more_than_one(tm->sm, b, result); +} + struct dm_block_manager *dm_tm_get_bm(struct dm_transaction_manager *tm) { return tm->bm; |