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addr.h	4.94 MB	View DL Edit
auth.h	6.11 MB	View DL Edit
auth_gss.h	2.31 MB	View DL Edit
bc_xprt.h	2.78 MB	View DL Edit
cache.h	8.96 MB	View DL Edit
clnt.h	9.01 MB	View DL Edit
debug.h	2.76 MB	View DL Edit
gss_api.h	4.45 MB	View DL Edit
gss_asn1.h	3.11 MB	View DL Edit
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gss_krb5.h	6.32 MB	View DL Edit
metrics.h	3.68 MB	View DL Edit
msg_prot.h	6.21 MB	View DL Edit
rpc_pipe_fs.h	3.85 MB	View DL Edit
rpc_rdma.h	6.07 MB	View DL Edit
rpc_rdma_cid.h	622 B	View DL Edit
sched.h	9.91 MB	View DL Edit
stats.h	2 MB	View DL Edit
svc.h	18.39 MB	View DL Edit
svcauth.h	6.01 MB	View DL Edit
svcauth_gss.h	782 B	View DL Edit
svcsock.h	2.18 MB	View DL Edit
svc_rdma.h	7.63 MB	View DL Edit
svc_rdma_pcl.h	3.13 MB	View DL Edit
svc_xprt.h	7.33 MB	View DL Edit
timer.h	1.14 MB	View DL Edit
types.h	497 B	View DL Edit
xdr.h	22.31 MB	View DL Edit
xprt.h	16.56 MB	View DL Edit
xprtmultipath.h	2.41 MB	View DL Edit
xprtrdma.h	2.95 MB	View DL Edit
xprtsock.h	1.85 MB	View DL Edit

Edit file: /usr/src/kernels/5.14.0-427.31.1.el9_4.x86_64/include/linux/sunrpc/rpc_rdma.h

/* 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		1
#define rpcrdma_version		cpu_to_be32(RPCRDMA_VERSION)

enum {
	RPCRDMA_V1_DEF_INLINE_SIZE	= 1024,
};

/*
 * XDR sizes, in quads
 */
enum {
	rpcrdma_fixed_maxsz	= 4,
	rpcrdma_segment_maxsz	= 4,
	rpcrdma_readseg_maxsz	= 1 + rpcrdma_segment_maxsz,
	rpcrdma_readchunk_maxsz	= 1 + rpcrdma_readseg_maxsz,
};

/*
 * Smallest RPC/RDMA header: rm_xid through rm_type, then rm_nochunks
 */
#define RPCRDMA_HDRLEN_MIN	(sizeof(__be32) * 7)
#define RPCRDMA_HDRLEN_ERR	(sizeof(__be32) * 5)

enum rpcrdma_errcode {
	ERR_VERS = 1,
	ERR_CHUNK = 2
};

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 */
};

#define rdma_msg	cpu_to_be32(RDMA_MSG)
#define rdma_nomsg	cpu_to_be32(RDMA_NOMSG)
#define rdma_msgp	cpu_to_be32(RDMA_MSGP)
#define rdma_done	cpu_to_be32(RDMA_DONE)
#define rdma_error	cpu_to_be32(RDMA_ERROR)

#define err_vers	cpu_to_be32(ERR_VERS)
#define err_chunk	cpu_to_be32(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 {
	__be32			cp_magic;
	u8			cp_version;
	u8			cp_flags;
	u8			cp_send_size;
	u8			cp_recv_size;
} __packed;

#define rpcrdma_cmp_magic	__cpu_to_be32(0xf6ab0e18)

enum {
	RPCRDMA_CMP_VERSION		= 1,
	RPCRDMA_CMP_F_SND_W_INV_OK	= BIT(0),
};

static inline u8
rpcrdma_encode_buffer_size(unsigned int size)
{
	return (size >> 10) - 1;
}

static inline unsigned int
rpcrdma_decode_buffer_size(u8 val)
{
	return ((unsigned int)val + 1) << 10;
}

/**
 * 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)
{
	*p++ = cpu_to_be32(handle);
	*p++ = cpu_to_be32(length);
	return xdr_encode_hyper(p, 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)
{
	*p++ = cpu_to_be32(position);
	return xdr_encode_rdma_segment(p, handle, length, 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)
{
	*handle = be32_to_cpup(p++);
	*length = be32_to_cpup(p++);
	return xdr_decode_hyper(p, 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)
{
	*position = be32_to_cpup(p++);
	return xdr_decode_rdma_segment(p, handle, length, offset);
}

#endif				/* _LINUX_SUNRPC_RPC_RDMA_H */

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