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44829d02d2
The Version One default inline threshold is still 1KB. But allow testing with thresholds up to 64KB. This maximum is somewhat arbitrary. There's no fundamental architectural limit I'm aware of, but it's good to keep the size of Receive buffers reasonable. Now that Send can use a s/g list, a Send buffer is only as large as each RPC requires. Receive buffers are always the size of the inline threshold, however. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
73 lines
2.9 KiB
C
73 lines
2.9 KiB
C
/*
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* Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the BSD-type
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* license below:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* Neither the name of the Network Appliance, Inc. nor the names of
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* its contributors may be used to endorse or promote products
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* derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _LINUX_SUNRPC_XPRTRDMA_H
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#define _LINUX_SUNRPC_XPRTRDMA_H
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/*
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* Constants. Max RPC/NFS header is big enough to account for
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* additional marshaling buffers passed down by Linux client.
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*
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* RDMA header is currently fixed max size, and is big enough for a
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* fully-chunked NFS message (read chunks are the largest). Note only
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* a single chunk type per message is supported currently.
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*/
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#define RPCRDMA_MIN_SLOT_TABLE (2U)
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#define RPCRDMA_DEF_SLOT_TABLE (128U)
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#define RPCRDMA_MAX_SLOT_TABLE (256U)
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#define RPCRDMA_MIN_INLINE (1024) /* min inline thresh */
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#define RPCRDMA_DEF_INLINE (4096) /* default inline thresh */
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#define RPCRDMA_MAX_INLINE (65536) /* max inline thresh */
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/* Memory registration strategies, by number.
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* This is part of a kernel / user space API. Do not remove. */
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enum rpcrdma_memreg {
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RPCRDMA_BOUNCEBUFFERS = 0,
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RPCRDMA_REGISTER,
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RPCRDMA_MEMWINDOWS,
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RPCRDMA_MEMWINDOWS_ASYNC,
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RPCRDMA_MTHCAFMR,
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RPCRDMA_FRMR,
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RPCRDMA_ALLPHYSICAL,
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RPCRDMA_LAST
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};
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#endif /* _LINUX_SUNRPC_XPRTRDMA_H */
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