+/*
+ * NFS_ requests are mapped on the client side by the chunk lists in
+ * the RPCRDMA header. During the fetching of the RPC from the client
+ * and the writing of the reply to the client, the memory in the
+ * client and the memory in the server must be mapped as contiguous
+ * vaddr/len for access by the hardware. These data strucures keep
+ * these mappings.
+ *
+ * For an RDMA_WRITE, the 'sge' maps the RPC REPLY. For RDMA_READ, the
+ * 'sge' in the svc_rdma_req_map maps the server side RPC reply and the
+ * 'ch' field maps the read-list of the RPCRDMA header to the 'sge'
+ * mapping of the reply.
+ */
+struct svc_rdma_chunk_sge {
+ int start; /* sge no for this chunk */
+ int count; /* sge count for this chunk */
+};
+struct svc_rdma_req_map {
+ unsigned long count;
+ union {
+ struct kvec sge[RPCSVC_MAXPAGES];
+ struct svc_rdma_chunk_sge ch[RPCSVC_MAXPAGES];
+ };
+};
+