Command 103: LDLM_CANCEL
~~~~~~~~~~~~~~~~~~~~~~~~
[[ldlm-cancel-rpc]]

An RPC that notifies an entity that a requested lock is no longer needed.

.LDLM_CANCEL Generic Packet Structure
image::ldlm-cancel-generic.png["LDLM_CANCEL Generic Packet Structure",height=100]

//////////////////////////////////////////////////////////////////////
The ldlm-cancel-generic.png diagram resembles this text
art:

       LDLM_CANCEL:
      --request---------------------
      | ptlrpc_body | ldlm_request |
      ------------------------------
      --reply--------
      | ptlrpc_body |
      ---------------
//////////////////////////////////////////////////////////////////////

'ptlrpc_body'::
RPC descriptor.

'ldlm_request'::
The request RPC identifies the lock being canceled. Only the first
'lock_handle' field is used. The rest of the 'ldlm_request' sturcture
is not used.