CEPH_CAP_FILE_SHARED vs CEPH_CAP_FILE_RD

[Marvin Zhang <fanzier@xxxxxxxxx>]

Hi guys,
They look very similar from defination. Can anyone tell me the difference?

Here are defination:
#define CEPH_CAP_FILE_SHARED (CEPH_CAP_GSHARED << CEPH_CAP_SFILE)
#define CEPH_CAP_FILE_RD (CEPH_CAP_GRD << CEPH_CAP_SFILE)

#define CEPH_CAP_GSHARED 1 /* client can reads */
#define CEPH_CAP_GRD 8 /* (file) client can read */

Thansk,
Marvin