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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
/******************************************************************************
* fsif.h
*
* Interface to FS level split device drivers.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Copyright (c) 2007, Grzegorz Milos, <gm281@cam.ac.uk>.
*/
#ifndef __XEN_PUBLIC_IO_FSIF_H__
#define __XEN_PUBLIC_IO_FSIF_H__
#include "ring.h"
#include "../grant_table.h"
#define REQ_FILE_OPEN 1
#define REQ_FILE_CLOSE 2
#define REQ_FILE_READ 3
#define REQ_FILE_WRITE 4
#define REQ_STAT 5
#define REQ_FILE_TRUNCATE 6
#define REQ_REMOVE 7
#define REQ_RENAME 8
#define REQ_CREATE 9
#define REQ_DIR_LIST 10
#define REQ_CHMOD 11
#define REQ_FS_SPACE 12
#define REQ_FILE_SYNC 13
struct fsif_open_request {
grant_ref_t gref;
};
struct fsif_close_request {
uint32_t fd;
};
struct fsif_read_request {
uint32_t fd;
int32_t pad;
uint64_t len;
uint64_t offset;
grant_ref_t grefs[1]; /* Variable length */
};
struct fsif_write_request {
uint32_t fd;
int32_t pad;
uint64_t len;
uint64_t offset;
grant_ref_t grefs[1]; /* Variable length */
};
struct fsif_stat_request {
uint32_t fd;
};
/* This structure is a copy of some fields from stat structure, returned
* via the ring. */
struct fsif_stat_response {
int32_t stat_mode;
uint32_t stat_uid;
uint32_t stat_gid;
int32_t stat_ret;
int64_t stat_size;
int64_t stat_atime;
int64_t stat_mtime;
int64_t stat_ctime;
};
struct fsif_truncate_request {
uint32_t fd;
int32_t pad;
int64_t length;
};
struct fsif_remove_request {
grant_ref_t gref;
};
struct fsif_rename_request {
uint16_t old_name_offset;
uint16_t new_name_offset;
grant_ref_t gref;
};
struct fsif_create_request {
int8_t directory;
int8_t pad;
int16_t pad2;
int32_t mode;
grant_ref_t gref;
};
struct fsif_list_request {
uint32_t offset;
grant_ref_t gref;
};
#define NR_FILES_SHIFT 0
#define NR_FILES_SIZE 16 /* 16 bits for the number of files mask */
#define NR_FILES_MASK (((1ULL << NR_FILES_SIZE) - 1) << NR_FILES_SHIFT)
#define ERROR_SIZE 32 /* 32 bits for the error mask */
#define ERROR_SHIFT (NR_FILES_SIZE + NR_FILES_SHIFT)
#define ERROR_MASK (((1ULL << ERROR_SIZE) - 1) << ERROR_SHIFT)
#define HAS_MORE_SHIFT (ERROR_SHIFT + ERROR_SIZE)
#define HAS_MORE_FLAG (1ULL << HAS_MORE_SHIFT)
struct fsif_chmod_request {
uint32_t fd;
int32_t mode;
};
struct fsif_space_request {
grant_ref_t gref;
};
struct fsif_sync_request {
uint32_t fd;
};
/* FS operation request */
struct fsif_request {
uint8_t type; /* Type of the request */
uint8_t pad;
uint16_t id; /* Request ID, copied to the response */
uint32_t pad2;
union {
struct fsif_open_request fopen;
struct fsif_close_request fclose;
struct fsif_read_request fread;
struct fsif_write_request fwrite;
struct fsif_stat_request fstat;
struct fsif_truncate_request ftruncate;
struct fsif_remove_request fremove;
struct fsif_rename_request frename;
struct fsif_create_request fcreate;
struct fsif_list_request flist;
struct fsif_chmod_request fchmod;
struct fsif_space_request fspace;
struct fsif_sync_request fsync;
} u;
};
typedef struct fsif_request fsif_request_t;
/* FS operation response */
struct fsif_response {
uint16_t id;
uint16_t pad1;
uint32_t pad2;
union {
uint64_t ret_val;
struct fsif_stat_response fstat;
};
};
typedef struct fsif_response fsif_response_t;
#define FSIF_RING_ENTRY_SIZE 64
#define FSIF_NR_READ_GNTS ((FSIF_RING_ENTRY_SIZE - sizeof(struct fsif_read_request)) / \
sizeof(grant_ref_t) + 1)
#define FSIF_NR_WRITE_GNTS ((FSIF_RING_ENTRY_SIZE - sizeof(struct fsif_write_request)) / \
sizeof(grant_ref_t) + 1)
DEFINE_RING_TYPES(fsif, struct fsif_request, struct fsif_response);
#define STATE_INITIALISED "init"
#define STATE_READY "ready"
#endif
|
