[Bugs] [Bug 1354205] New: rpc: set struct saved_frame's member rsp

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1354205

            Bug ID: 1354205
           Summary: rpc: set struct saved_frame's member rsp
           Product: GlusterFS
           Version: mainline
         Component: rpc
          Assignee: bugs at gluster.org
          Reporter: johnzzpcrystal at gmail.com
                CC: bugs at gluster.org



Description of problem:
    In rpc layer, we will notify RPC_TRANSPORT_MAP_XID_REQUEST event to
rpc_clnt layer for getting original rpc_req when we get a reply. The info->rsp
will be copyed from saved_frame.rsp in function rpc_clnt_fill_request_info.
    But the struct saved_frame's member rsp hasn't ever been set in submitting
procedure which will cause request_info->rsp.payload_count==0 in function
__socket_read_reply, and then it will get a new rsp_iobuf for current vectored
reply, the rsp_iobuf has been set in function client3_3_readv actually.
    We don't need to get iobuf twice in one readv operation.

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