Release 4.12 include/linux/sunrpc/rpc_rdma.h
/*
* Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved.
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*
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#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,
};
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;
struct {
__be32 rm_err;
__be32 rm_vers_low;
__be32 rm_vers_high;
} rm_error;
__be32 rm_chunks[0]; /* read, write and reply chunks */
} rm_body;
};
/*
* XDR sizes, in quads
*/
enum {
rpcrdma_fixed_maxsz = 4,
rpcrdma_segment_maxsz = 4,
rpcrdma_readchunk_maxsz = 2 + rpcrdma_segment_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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chuck Lever | 20 | 100.00% | 1 | 100.00% |
| Total | 20 | 100.00% | 1 | 100.00% |
static inline unsigned int
rpcrdma_decode_buffer_size(u8 val)
{
return ((unsigned int)val + 1) << 10;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Chuck Lever | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
#endif /* _LINUX_SUNRPC_RPC_RDMA_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Talpey, Thomas | 171 | 47.77% | 1 | 9.09% |
| Chuck Lever | 168 | 46.93% | 8 | 72.73% |
| Al Viro | 16 | 4.47% | 1 | 9.09% |
| Boaz Harrosh | 3 | 0.84% | 1 | 9.09% |
| Total | 358 | 100.00% | 11 | 100.00% |
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