LDLM Reply
^^^^^^^^^^
[[struct-ldlm-reply]]

The 'ldlm_reply' structure is the reciprocal of the 'ldlm_request'.

----
struct ldlm_reply {
        __u32 lock_flags;
        __u32 lock_padding;     /* also fix lustre_swab_ldlm_reply */
        struct ldlm_lock_desc lock_desc;
        struct lustre_handle lock_handle;
        __u64  lock_policy_res1;
        __u64  lock_policy_res2;
};
----

It closely resembles the 'lock_request' in its structure. In this case
it is reporting back to the initiator of the request (in the
'lock_desc') both the lock that was actually granted, if any, and lock
server's (possibly) updated value for what was being requested.