classRDMAinfo(packet.utils.RDMAbase)
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.
Methodsdefinedhere:
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__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
classRDMArequest(builtins.object)
RDMA iWarp Request object
Methodsdefinedhere:
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__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
classRDMAseg(builtins.object)
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).
Methodsdefinedhere:
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__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
classRDMAsegment(builtins.object)
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.
Methodsdefinedhere:
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__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
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