/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ /* * Copyright (c) 2015-2017 Oracle. All rights reserved. * Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the BSD-type * license below: * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials provided * with the distribution. * * Neither the name of the Network Appliance, Inc. nor the names of * its contributors may be used to endorse or promote products * derived from this software without specific prior written * permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef _LINUX_SUNRPC_RPC_RDMA_H #define _LINUX_SUNRPC_RPC_RDMA_H #include <linux/types.h> #include <linux/bitops.h> #define RPCRDMA_VERSION … #define rpcrdma_version … enum { … }; /* * XDR sizes, in quads */ enum { … }; /* * Smallest RPC/RDMA header: rm_xid through rm_type, then rm_nochunks */ #define RPCRDMA_HDRLEN_MIN … #define RPCRDMA_HDRLEN_ERR … enum rpcrdma_errcode { … }; enum rpcrdma_proc { … }; #define rdma_msg … #define rdma_nomsg … #define rdma_msgp … #define rdma_done … #define rdma_error … #define err_vers … #define err_chunk … /* * Private extension to RPC-over-RDMA Version One. * Message passed during RDMA-CM connection set-up. * * Add new fields at the end, and don't permute existing * fields. */ struct rpcrdma_connect_private { … } __packed; #define rpcrdma_cmp_magic … enum { … }; static inline u8 rpcrdma_encode_buffer_size(unsigned int size) { … } static inline unsigned int rpcrdma_decode_buffer_size(u8 val) { … } /** * xdr_encode_rdma_segment - Encode contents of an RDMA segment * @p: Pointer into a send buffer * @handle: The RDMA handle to encode * @length: The RDMA length to encode * @offset: The RDMA offset to encode * * Return value: * Pointer to the XDR position that follows the encoded RDMA segment */ static inline __be32 *xdr_encode_rdma_segment(__be32 *p, u32 handle, u32 length, u64 offset) { … } /** * xdr_encode_read_segment - Encode contents of a Read segment * @p: Pointer into a send buffer * @position: The position to encode * @handle: The RDMA handle to encode * @length: The RDMA length to encode * @offset: The RDMA offset to encode * * Return value: * Pointer to the XDR position that follows the encoded Read segment */ static inline __be32 *xdr_encode_read_segment(__be32 *p, u32 position, u32 handle, u32 length, u64 offset) { … } /** * xdr_decode_rdma_segment - Decode contents of an RDMA segment * @p: Pointer to the undecoded RDMA segment * @handle: Upon return, the RDMA handle * @length: Upon return, the RDMA length * @offset: Upon return, the RDMA offset * * Return value: * Pointer to the XDR item that follows the RDMA segment */ static inline __be32 *xdr_decode_rdma_segment(__be32 *p, u32 *handle, u32 *length, u64 *offset) { … } /** * xdr_decode_read_segment - Decode contents of a Read segment * @p: Pointer to the undecoded Read segment * @position: Upon return, the segment's position * @handle: Upon return, the RDMA handle * @length: Upon return, the RDMA length * @offset: Upon return, the RDMA offset * * Return value: * Pointer to the XDR item that follows the Read segment */ static inline __be32 *xdr_decode_read_segment(__be32 *p, u32 *position, u32 *handle, u32 *length, u64 *offset) { … } #endif /* _LINUX_SUNRPC_RPC_RDMA_H */
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