ceph/ceph — pull request #1251 by ukernel (2014-02-16 14:37:08+00:00)
Title: ReplicatedPG: return no data if read size is trimmed to zero

OSD should return no data if the read size is trimmed to zero by the
truncate_seq/truncate_size check. We can't rely on ObjectStore::read()
to do that because it reads the entire object when the 'len' parameter
is zero.

Fixes: #7371
Signed-off-by: Yan, Zheng