[ceph-fs] kcephfs: why do we do an extra iput in this case?

Hi Zheng! I'm going over the cap handling in the kernel client, and saw this that I didn't quite understand: https://github.com/ceph/ceph-client/blob/daf5cc27eed99afdea8d96e71b89ba41f5… In the event that ceph_try_drop_cap_snap returns true, we'll queue up an extra iput for the inode. Where is that reference acquired? Thanks, -- Jeff Layton <jlayton(a)redhat.com>