117 lines
3.8 KiB
C
117 lines
3.8 KiB
C
/*
|
|
* 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
|
|
|
|
struct rpcrdma_segment {
|
|
__be32 rs_handle; /* Registered memory handle */
|
|
__be32 rs_length; /* Length of the chunk in bytes */
|
|
__be64 rs_offset; /* Chunk virtual address or offset */
|
|
};
|
|
|
|
/*
|
|
* read chunk(s), encoded as a linked list.
|
|
*/
|
|
struct rpcrdma_read_chunk {
|
|
__be32 rc_discrim; /* 1 indicates presence */
|
|
__be32 rc_position; /* Position in XDR stream */
|
|
struct rpcrdma_segment rc_target;
|
|
};
|
|
|
|
/*
|
|
* write chunk, and reply chunk.
|
|
*/
|
|
struct rpcrdma_write_chunk {
|
|
struct rpcrdma_segment wc_target;
|
|
};
|
|
|
|
/*
|
|
* write chunk(s), encoded as a counted array.
|
|
*/
|
|
struct rpcrdma_write_array {
|
|
__be32 wc_discrim; /* 1 indicates presence */
|
|
__be32 wc_nchunks; /* Array count */
|
|
struct rpcrdma_write_chunk wc_array[0];
|
|
};
|
|
|
|
struct rpcrdma_msg {
|
|
__be32 rm_xid; /* Mirrors the RPC header xid */
|
|
__be32 rm_vers; /* Version of this protocol */
|
|
__be32 rm_credit; /* Buffers requested/granted */
|
|
__be32 rm_type; /* Type of message (enum rpcrdma_proc) */
|
|
union {
|
|
|
|
struct { /* no chunks */
|
|
__be32 rm_empty[3]; /* 3 empty chunk lists */
|
|
} rm_nochunks;
|
|
|
|
struct { /* no chunks and padded */
|
|
__be32 rm_align; /* Padding alignment */
|
|
__be32 rm_thresh; /* Padding threshold */
|
|
__be32 rm_pempty[3]; /* 3 empty chunk lists */
|
|
} rm_padded;
|
|
|
|
__be32 rm_chunks[0]; /* read, write and reply chunks */
|
|
|
|
} rm_body;
|
|
};
|
|
|
|
#define RPCRDMA_HDRLEN_MIN 28
|
|
|
|
enum rpcrdma_errcode {
|
|
ERR_VERS = 1,
|
|
ERR_CHUNK = 2
|
|
};
|
|
|
|
struct rpcrdma_err_vers {
|
|
uint32_t rdma_vers_low; /* Version range supported by peer */
|
|
uint32_t rdma_vers_high;
|
|
};
|
|
|
|
enum rpcrdma_proc {
|
|
RDMA_MSG = 0, /* An RPC call or reply msg */
|
|
RDMA_NOMSG = 1, /* An RPC call or reply msg - separate body */
|
|
RDMA_MSGP = 2, /* An RPC call or reply msg with padding */
|
|
RDMA_DONE = 3, /* Client signals reply completion */
|
|
RDMA_ERROR = 4 /* An RPC RDMA encoding error */
|
|
};
|
|
|
|
#endif /* _LINUX_SUNRPC_RPC_RDMA_H */
|