blob: 14f970dd046dcf8dc5e73f374e0dc7e292e82c8a (
plain)
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
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/******************************************************************************
* domain_controller.h
*
* Interface to server controller (e.g., 'xend'). This header file defines the
* interface that is shared with guest OSes.
*
* Copyright (c) 2004, K A Fraser
*/
#ifndef __DOMAIN_CONTROLLER_H__
#define __DOMAIN_CONTROLLER_H__
#ifndef BASIC_START_INFO
#error "Xen header file hypervisor-if.h must already be included here."
#endif
/*
* EXTENDED BOOTSTRAP STRUCTURE FOR NEW DOMAINS.
*/
typedef struct {
BASIC_START_INFO;
unsigned int domain_controller_evtchn;
} extended_start_info_t;
/*
* CONTROLLER MESSAGING INTERFACE.
*/
typedef struct {
u8 type; /* echoed in response */
u8 subtype; /* echoed in response */
u8 id; /* echoed in response */
u8 length; /* number of bytes in 'msg' */
unsigned char msg[60]; /* type-specific message data */
} control_msg_t;
#define CONTROL_RING_SIZE 8
typedef unsigned int CONTROL_RING_IDX;
#define MASK_CONTROL_IDX(_i) ((_i)&(CONTROL_RING_SIZE-1))
typedef struct {
control_msg_t tx_ring[CONTROL_RING_SIZE]; /* guest-OS -> controller */
control_msg_t rx_ring[CONTROL_RING_SIZE]; /* controller -> guest-OS */
CONTROL_RING_IDX tx_req_prod, tx_resp_prod;
CONTROL_RING_IDX rx_req_prod, rx_resp_prod;
} control_if_t;
/*
* Top-level command types.
*/
#define CMSG_CONSOLE 0 /* Console */
#define CMSG_BLKIF_BE 1 /* Block-device backend */
#define CMSG_BLKIF_FE 2 /* Block-device frontend */
/*
* Subtypes for console messages.
*/
#define CMSG_CONSOLE_DATA 0
/*
* Subtypes for block-device messages.
*/
#define CMSG_BLKIF_BE_CREATE 0 /* Create a new block-device interface. */
#define CMSG_BLKIF_BE_DESTROY 1 /* Destroy a block-device interface. */
#define CMSG_BLKIF_BE_VBD_CREATE 2 /* Create a new VBD for an interface. */
#define CMSG_BLKIF_BE_VBD_DESTROY 3 /* Delete a VBD from an interface. */
#define CMSG_BLKIF_BE_VBD_GROW 4 /* Append an extent to a given VBD. */
#define CMSG_BLKIF_BE_VBD_SHRINK 5 /* Remove last extent from a given VBD. */
/*
* Message request/response defintions for block-device messages.
*/
#define blkif_vdev_t u16
#define blkif_pdev_t u16
#define blkif_sector_t u64
typedef struct {
blkif_pdev_t device;
blkif_sector_t sector_start;
blkif_sector_t sector_length;
} blkif_extent_t;
/* Non-specific 'okay' return. */
#define BLKIF_STATUS_OKAY 0
/* Non-specific 'error' return. */
#define BLKIF_STATUS_ERROR 1
/* The following are specific error returns. */
#define BLKIF_STATUS_INTERFACE_EXISTS 2
#define BLKIF_STATUS_INTERFACE_NOT_FOUND 3
/* This macro can be used to create an array of descriptive error strings. */
#define BLKIF_STATUS_ERRORS { \
"Okay", \
"Non-specific error", \
"Interface already exists", \
"Interface not found" }
/* CMSG_BLKIF_CREATE */
typedef struct {
/* IN */
domid_t domid; /* Domain attached to new interface. */
unsigned int blkif_handle; /* Domain-specific interface handle. */
unsigned int evtchn; /* Event channel for notifications. */
unsigned long shmem_frame; /* Page cont. shared comms window. */
/* OUT */
unsigned int status;
} blkif_create_t;
/* CMSG_BLKIF_DESTROY */
typedef struct {
/* IN */
domid_t domid; /* Identify interface to be destroyed. */
unsigned int blkif_handle; /* ...ditto... */
/* OUT */
unsigned int status;
} blkif_destroy_t;
/* CMSG_BLKIF_VBD_CREATE */
typedef struct {
/* IN */
domid_t domid; /* Identify blkdev interface. */
unsigned int blkif_handle; /* ...ditto... */
blkif_vdev_t vdevice; /* Interface-specific id for this VBD. */
int readonly; /* Non-zero -> VBD isn't writeable. */
/* OUT */
unsigned int status;
} blkif_vbd_create_t;
/* CMSG_BLKIF_VBD_DESTROY */
typedef struct {
/* IN */
domid_t domid; /* Identify blkdev interface. */
unsigned int blkif_handle; /* ...ditto... */
blkif_vdev_t vdevice; /* Interface-specific id of the VBD. */
/* OUT */
unsigned int status;
} blkif_vbd_destroy_t;
/* CMSG_BLKIF_VBD_GROW */
typedef struct {
/* IN */
domid_t domid; /* Identify blkdev interface. */
unsigned int blkif_handle; /* ...ditto... */
blkif_vdev_t vdevice; /* Interface-specific id of the VBD. */
blkif_extent_t extent; /* Physical extent to append to VBD. */
/* OUT */
unsigned int status;
} blkif_vbd_grow_t;
/* CMSG_BLKIF_VBD_SHRINK */
typedef struct {
/* IN */
domid_t domid; /* Identify blkdev interface. */
unsigned int blkif_handle; /* ...ditto... */
blkif_vdev_t vdevice; /* Interface-specific id of the VBD. */
/* OUT */
unsigned int status;
} blkif_vbd_shrink_t;
#endif /* __DOMAIN_CONTROLLER_H__ */
|
