Hello, This fixes a potential data corruption in the destination image in differential backup and especially snapshot-based mirroring use cases with fast-diff enabled. Thanks, Ilya Ilya Dryomov (2): rbd: move RBD_OBJ_FLAG_COPYUP_ENABLED flag setting rbd: get snapshot context after exclusive lock is ensured to be held drivers/block/rbd.c | 62 ++++++++++++++++++++++++++++++++------------- 1 file changed, 44 insertions(+), 18 deletions(-) -- 2.39.2