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TOMOYO Linux Cross Reference
Linux/include/linux/sunrpc/xprtrdma.h

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  1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
  2 /*
  3  * Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved.
  4  *
  5  * This software is available to you under a choice of one of two
  6  * licenses.  You may choose to be licensed under the terms of the GNU
  7  * General Public License (GPL) Version 2, available from the file
  8  * COPYING in the main directory of this source tree, or the BSD-type
  9  * license below:
 10  *
 11  * Redistribution and use in source and binary forms, with or without
 12  * modification, are permitted provided that the following conditions
 13  * are met:
 14  *
 15  *      Redistributions of source code must retain the above copyright
 16  *      notice, this list of conditions and the following disclaimer.
 17  *
 18  *      Redistributions in binary form must reproduce the above
 19  *      copyright notice, this list of conditions and the following
 20  *      disclaimer in the documentation and/or other materials provided
 21  *      with the distribution.
 22  *
 23  *      Neither the name of the Network Appliance, Inc. nor the names of
 24  *      its contributors may be used to endorse or promote products
 25  *      derived from this software without specific prior written
 26  *      permission.
 27  *
 28  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 29  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 30  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 31  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 32  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 33  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 34  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 35  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 36  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 37  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 38  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 39  */
 40 
 41 #ifndef _LINUX_SUNRPC_XPRTRDMA_H
 42 #define _LINUX_SUNRPC_XPRTRDMA_H
 43 
 44 /*
 45  * Constants. Max RPC/NFS header is big enough to account for
 46  * additional marshaling buffers passed down by Linux client.
 47  *
 48  * RDMA header is currently fixed max size, and is big enough for a
 49  * fully-chunked NFS message (read chunks are the largest). Note only
 50  * a single chunk type per message is supported currently.
 51  */
 52 #define RPCRDMA_MIN_SLOT_TABLE  (4U)
 53 #define RPCRDMA_DEF_SLOT_TABLE  (128U)
 54 #define RPCRDMA_MAX_SLOT_TABLE  (16384U)
 55 
 56 #define RPCRDMA_MIN_INLINE  (1024)      /* min inline thresh */
 57 #define RPCRDMA_DEF_INLINE  (4096)      /* default inline thresh */
 58 #define RPCRDMA_MAX_INLINE  (65536)     /* max inline thresh */
 59 
 60 /* Memory registration strategies, by number.
 61  * This is part of a kernel / user space API. Do not remove. */
 62 enum rpcrdma_memreg {
 63         RPCRDMA_BOUNCEBUFFERS = 0,
 64         RPCRDMA_REGISTER,
 65         RPCRDMA_MEMWINDOWS,
 66         RPCRDMA_MEMWINDOWS_ASYNC,
 67         RPCRDMA_MTHCAFMR,
 68         RPCRDMA_FRWR,
 69         RPCRDMA_ALLPHYSICAL,
 70         RPCRDMA_LAST
 71 };
 72 
 73 #endif /* _LINUX_SUNRPC_XPRTRDMA_H */
 74 

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