root / block.h @ c4c38c8c
History | View | Annotate | Download (7.7 kB)
1 |
#ifndef BLOCK_H
|
---|---|
2 |
#define BLOCK_H
|
3 |
|
4 |
#include "qemu-aio.h" |
5 |
#include "qemu-common.h" |
6 |
#include "qemu-option.h" |
7 |
|
8 |
/* block.c */
|
9 |
typedef struct BlockDriver BlockDriver; |
10 |
|
11 |
typedef struct BlockDriverInfo { |
12 |
/* in bytes, 0 if irrelevant */
|
13 |
int cluster_size;
|
14 |
/* offset at which the VM state can be saved (0 if not possible) */
|
15 |
int64_t vm_state_offset; |
16 |
} BlockDriverInfo; |
17 |
|
18 |
typedef struct QEMUSnapshotInfo { |
19 |
char id_str[128]; /* unique snapshot id */ |
20 |
/* the following fields are informative. They are not needed for
|
21 |
the consistency of the snapshot */
|
22 |
char name[256]; /* user choosen name */ |
23 |
uint32_t vm_state_size; /* VM state info size */
|
24 |
uint32_t date_sec; /* UTC date of the snapshot */
|
25 |
uint32_t date_nsec; |
26 |
uint64_t vm_clock_nsec; /* VM clock relative to boot */
|
27 |
} QEMUSnapshotInfo; |
28 |
|
29 |
#define BDRV_O_RDONLY 0x0000 |
30 |
#define BDRV_O_RDWR 0x0002 |
31 |
#define BDRV_O_ACCESS 0x0003 |
32 |
#define BDRV_O_CREAT 0x0004 /* create an empty file */ |
33 |
#define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */ |
34 |
#define BDRV_O_FILE 0x0010 /* open as a raw file (do not try to |
35 |
use a disk image format on top of
|
36 |
it (default for
|
37 |
bdrv_file_open()) */
|
38 |
#define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */ |
39 |
#define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */ |
40 |
#define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */ |
41 |
|
42 |
#define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB)
|
43 |
|
44 |
void bdrv_info(Monitor *mon);
|
45 |
void bdrv_info_stats(Monitor *mon);
|
46 |
|
47 |
void bdrv_init(void); |
48 |
BlockDriver *bdrv_find_format(const char *format_name); |
49 |
int bdrv_create(BlockDriver *drv, const char* filename, |
50 |
QEMUOptionParameter *options); |
51 |
int bdrv_create2(BlockDriver *drv,
|
52 |
const char *filename, int64_t size_in_sectors, |
53 |
const char *backing_file, const char *backing_format, |
54 |
int flags);
|
55 |
BlockDriverState *bdrv_new(const char *device_name); |
56 |
void bdrv_delete(BlockDriverState *bs);
|
57 |
int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags); |
58 |
int bdrv_open(BlockDriverState *bs, const char *filename, int flags); |
59 |
int bdrv_open2(BlockDriverState *bs, const char *filename, int flags, |
60 |
BlockDriver *drv); |
61 |
void bdrv_close(BlockDriverState *bs);
|
62 |
int bdrv_check(BlockDriverState *bs);
|
63 |
int bdrv_read(BlockDriverState *bs, int64_t sector_num,
|
64 |
uint8_t *buf, int nb_sectors);
|
65 |
int bdrv_write(BlockDriverState *bs, int64_t sector_num,
|
66 |
const uint8_t *buf, int nb_sectors); |
67 |
int bdrv_pread(BlockDriverState *bs, int64_t offset,
|
68 |
void *buf, int count); |
69 |
int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
|
70 |
const void *buf, int count); |
71 |
int bdrv_truncate(BlockDriverState *bs, int64_t offset);
|
72 |
int64_t bdrv_getlength(BlockDriverState *bs); |
73 |
void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr);
|
74 |
void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs); |
75 |
int bdrv_commit(BlockDriverState *bs);
|
76 |
void bdrv_register(BlockDriver *bdrv);
|
77 |
|
78 |
/* async block I/O */
|
79 |
typedef struct BlockDriverAIOCB BlockDriverAIOCB; |
80 |
typedef void BlockDriverCompletionFunc(void *opaque, int ret); |
81 |
|
82 |
BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, |
83 |
QEMUIOVector *iov, int nb_sectors,
|
84 |
BlockDriverCompletionFunc *cb, void *opaque);
|
85 |
BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, |
86 |
QEMUIOVector *iov, int nb_sectors,
|
87 |
BlockDriverCompletionFunc *cb, void *opaque);
|
88 |
BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs, |
89 |
BlockDriverCompletionFunc *cb, void *opaque);
|
90 |
void bdrv_aio_cancel(BlockDriverAIOCB *acb);
|
91 |
|
92 |
typedef struct BlockRequest { |
93 |
/* Fields to be filled by multiwrite caller */
|
94 |
int64_t sector; |
95 |
int nb_sectors;
|
96 |
QEMUIOVector *qiov; |
97 |
BlockDriverCompletionFunc *cb; |
98 |
void *opaque;
|
99 |
|
100 |
/* Filled by multiwrite implementation */
|
101 |
int error;
|
102 |
} BlockRequest; |
103 |
|
104 |
int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs,
|
105 |
int num_reqs);
|
106 |
|
107 |
/* sg packet commands */
|
108 |
int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf); |
109 |
BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, |
110 |
unsigned long int req, void *buf, |
111 |
BlockDriverCompletionFunc *cb, void *opaque);
|
112 |
|
113 |
/* Ensure contents are flushed to disk. */
|
114 |
void bdrv_flush(BlockDriverState *bs);
|
115 |
void bdrv_flush_all(void); |
116 |
|
117 |
int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, |
118 |
int *pnum);
|
119 |
|
120 |
#define BDRV_TYPE_HD 0 |
121 |
#define BDRV_TYPE_CDROM 1 |
122 |
#define BDRV_TYPE_FLOPPY 2 |
123 |
#define BIOS_ATA_TRANSLATION_AUTO 0 |
124 |
#define BIOS_ATA_TRANSLATION_NONE 1 |
125 |
#define BIOS_ATA_TRANSLATION_LBA 2 |
126 |
#define BIOS_ATA_TRANSLATION_LARGE 3 |
127 |
#define BIOS_ATA_TRANSLATION_RECHS 4 |
128 |
|
129 |
void bdrv_set_geometry_hint(BlockDriverState *bs,
|
130 |
int cyls, int heads, int secs); |
131 |
void bdrv_set_type_hint(BlockDriverState *bs, int type); |
132 |
void bdrv_set_translation_hint(BlockDriverState *bs, int translation); |
133 |
void bdrv_get_geometry_hint(BlockDriverState *bs,
|
134 |
int *pcyls, int *pheads, int *psecs); |
135 |
int bdrv_get_type_hint(BlockDriverState *bs);
|
136 |
int bdrv_get_translation_hint(BlockDriverState *bs);
|
137 |
int bdrv_is_removable(BlockDriverState *bs);
|
138 |
int bdrv_is_read_only(BlockDriverState *bs);
|
139 |
int bdrv_is_sg(BlockDriverState *bs);
|
140 |
int bdrv_enable_write_cache(BlockDriverState *bs);
|
141 |
int bdrv_is_inserted(BlockDriverState *bs);
|
142 |
int bdrv_media_changed(BlockDriverState *bs);
|
143 |
int bdrv_is_locked(BlockDriverState *bs);
|
144 |
void bdrv_set_locked(BlockDriverState *bs, int locked); |
145 |
int bdrv_eject(BlockDriverState *bs, int eject_flag); |
146 |
void bdrv_set_change_cb(BlockDriverState *bs,
|
147 |
void (*change_cb)(void *opaque), void *opaque); |
148 |
void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size); |
149 |
BlockDriverState *bdrv_find(const char *name); |
150 |
void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs), |
151 |
void *opaque);
|
152 |
int bdrv_is_encrypted(BlockDriverState *bs);
|
153 |
int bdrv_key_required(BlockDriverState *bs);
|
154 |
int bdrv_set_key(BlockDriverState *bs, const char *key); |
155 |
int bdrv_query_missing_keys(void); |
156 |
void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
157 |
void *opaque);
|
158 |
const char *bdrv_get_device_name(BlockDriverState *bs); |
159 |
int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
|
160 |
const uint8_t *buf, int nb_sectors); |
161 |
int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi);
|
162 |
|
163 |
const char *bdrv_get_encrypted_filename(BlockDriverState *bs); |
164 |
void bdrv_get_backing_filename(BlockDriverState *bs,
|
165 |
char *filename, int filename_size); |
166 |
int bdrv_snapshot_create(BlockDriverState *bs,
|
167 |
QEMUSnapshotInfo *sn_info); |
168 |
int bdrv_snapshot_goto(BlockDriverState *bs,
|
169 |
const char *snapshot_id); |
170 |
int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id); |
171 |
int bdrv_snapshot_list(BlockDriverState *bs,
|
172 |
QEMUSnapshotInfo **psn_info); |
173 |
char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn); |
174 |
|
175 |
char *get_human_readable_size(char *buf, int buf_size, int64_t size); |
176 |
int path_is_absolute(const char *path); |
177 |
void path_combine(char *dest, int dest_size, |
178 |
const char *base_path, |
179 |
const char *filename); |
180 |
|
181 |
int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, |
182 |
int64_t pos, int size);
|
183 |
|
184 |
int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf,
|
185 |
int64_t pos, int size);
|
186 |
|
187 |
#endif
|