packet.transport.rdmainfo - Man Page
RDMA reassembly module
Provides functionality to reassemble RDMA fragments.
RDMA info object used for reassembly The reassembled message consists of one or multiple chunks and each chunk in turn could be composed of multiple segments. Also, each segment could be composed of multiple sub-segments and each sub-segment could be composed of multiple fragments. The protocol only defines segments but if the segment length is large, it is split into multiple sub-segments in which each sub-segment is specified by RDMA_WRITE_First or RDMA_READ_Request packets. The handle is the same for each of these packets but with a shorter DMA length. Thus in order to reassemble all fragments for a single message, a list of segments is created where each segment is identified by its handle or RKey and the message is reassembled according to the chuck lists specified by the RPC-over-RDMA layer. Methods defined here: --------------------- __del__ = reset(self) __init__(self) Constructor Initialize object's private data according to the arguments given. Arguments can be given as positional, named arguments or a combination of both. __len__ = size(self) add_iwarp_data(self, rdmap, unpack, isread=False) Add iWarp fragment data add_iwarp_request(self, rdmap) Add iWarp read request information add_rdma_data(self, psn, unpack, reth=None, only=False, read=False) Add Infiniband fragment data add_rdma_segment(self, rdma_seg, rpcrdma=None) Add RDMA segment information and if the information already exists just update the length and return the segment del_rdma_segment(self, rsegment) Delete RDMA segment information get_rdma_segment(self, handle) Return RDMA segment identified by the given handle process_rdma_segments(self, rpcrdma) Process the RPC-over-RDMA chunks When this method is called on an RPC call, it adds the information of all the segments to the list of segments. When this method is called on an RPC reply, the segments should already exist so just update the segment's DMA length as returned by the reply. RPCoRDMA reads attribute is a list of read segments Read segment is a plain segment plus an XDR position A read chunk is the collection of all read segments with the same XDR position RPCoRDMA writes attribute is a list of write chunks A write chunk is a list of plain segments RPCoRDMA reply is just a single write chunk if it exists. Return the reply chunk data reassemble_rdma_reads(self, unpack, psn=None, only=False, rdmap=None) Reassemble RDMA read chunks The RDMA read chunks are reassembled in the read last operation reset(self) Clear RDMA segments size(self) Return the number RDMA segments
RDMA iWarp Request object Methods defined here: --------------------- __contains__(self, offset) Membership test operator. Return true if offset belongs to this request __init__(self, rdmap, rsegment) Initialize self. See help(type(self)) for accurate signature. get_offset(self, offset) Return offset translated from sink to src
RDMA sub-segment object The sub-segment is created for each RDMA_WRITE_First, RDMA_WRITE_Only or RDMA_READ_Request and each sub-segment belongs to a list in the RDMAsegment object so there is no segment identifier or handle. Reassembly for each sub-segment is done using the PSN or packet sequence number in each of the data fragments. Therefore, a range of PSN numbers define this object which is given by the spsn and epsn attributes (first and last PSN respectively). Methods defined here: --------------------- __del__(self) Destructor __init__(self, spsn, epsn, dmalen) Initialize self. See help(type(self)) for accurate signature. get_data(self, padding=True) Return sub-segment data get_size(self) Return sub-segment data size insert_data(self, psn, data) Insert data at correct position given by the psn
RDMA segment object Each segment is identified by its handle. The segment information comes from the RPC-over-RDMA protocol layer so the length attribute gives the total DMA length of the segment. Methods defined here: --------------------- __del__(self) Destructor __init__(self, rdma_seg, rpcrdma) Initialize self. See help(type(self)) for accurate signature. add_data(self, psn, data) Add Infiniband fragment data add_fragment(self, offset, data) Add iWarp fragment to segment add_sub_segment(self, psn, dmalen, only=False, iosize=0) Add RDMA sub-segment PSN information get_data(self, padding=True) Return segment data get_size(self) Return segment data valid_psn(self, psn) True if given psn is valid for this segment
No known bugs.
Jorge Mora (firstname.lastname@example.org)
21 March 2023 NFStest 3.2 rdmainfo 1.1