1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
/*
* Copyright (c) 2008, XenSource Inc.
* All rights reserved.
*
* 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 XenSource 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 _TAPDISK_RING_H_
#define _TAPDISK_RING_H_
#include <inttypes.h>
#include <xenctrl.h>
#include <xen/io/ring.h>
typedef struct td_uring td_uring_t;
typedef struct td_uring_header td_uring_header_t;
typedef struct td_uring_request td_uring_request_t;
typedef struct td_uring_response td_uring_response_t;
struct td_uring {
int ctlfd;
char *shmem_path;
char *ctlfd_path;
void *shmem;
void *ring_area;
void *data_area;
};
struct td_uring_header {
char cookie[8];
uint32_t version;
uint32_t shmem_size;
uint32_t ring_size;
uint32_t data_size;
char reserved[4064];
};
struct td_uring_request {
uint8_t op;
uint64_t id;
uint64_t sec;
uint32_t secs;
uint32_t offset;
};
struct td_uring_response {
uint8_t op;
uint64_t id;
uint8_t status;
};
DEFINE_RING_TYPES(td_uring, td_uring_request_t, td_uring_response_t);
int tapdisk_uring_create(td_uring_t *, const char *location,
uint32_t ring_size, uint32_t data_size);
int tapdisk_uring_destroy(td_uring_t *);
int tapdisk_uring_connect(td_uring_t *, const char *location);
int tapdisk_uring_disconnect(td_uring_t *);
int tapdisk_uring_poll(td_uring_t *);
int tapdisk_uring_kick(td_uring_t *);
#endif
|
