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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /include/linux/sunrpc/rpc_rdma.h
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'include/linux/sunrpc/rpc_rdma.h')
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diff --git a/include/linux/sunrpc/rpc_rdma.h b/include/linux/sunrpc/rpc_rdma.h
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+/*
+ * 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>
+
+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 */