Annotation of qemu/block.h, revision 1.1.1.3
1.1 root 1: #ifndef BLOCK_H
2: #define BLOCK_H
3:
1.1.1.2 root 4: #include "qemu-aio.h"
5: #include "qemu-common.h"
6:
1.1 root 7: /* block.c */
8: typedef struct BlockDriver BlockDriver;
9:
10: extern BlockDriver bdrv_raw;
11: extern BlockDriver bdrv_host_device;
12: extern BlockDriver bdrv_cow;
13: extern BlockDriver bdrv_qcow;
14: extern BlockDriver bdrv_vmdk;
15: extern BlockDriver bdrv_cloop;
16: extern BlockDriver bdrv_dmg;
17: extern BlockDriver bdrv_bochs;
18: extern BlockDriver bdrv_vpc;
19: extern BlockDriver bdrv_vvfat;
20: extern BlockDriver bdrv_qcow2;
21: extern BlockDriver bdrv_parallels;
1.1.1.2 root 22: extern BlockDriver bdrv_nbd;
1.1 root 23:
24: typedef struct BlockDriverInfo {
25: /* in bytes, 0 if irrelevant */
26: int cluster_size;
27: /* offset at which the VM state can be saved (0 if not possible) */
28: int64_t vm_state_offset;
29: } BlockDriverInfo;
30:
31: typedef struct QEMUSnapshotInfo {
32: char id_str[128]; /* unique snapshot id */
33: /* the following fields are informative. They are not needed for
34: the consistency of the snapshot */
35: char name[256]; /* user choosen name */
36: uint32_t vm_state_size; /* VM state info size */
37: uint32_t date_sec; /* UTC date of the snapshot */
38: uint32_t date_nsec;
39: uint64_t vm_clock_nsec; /* VM clock relative to boot */
40: } QEMUSnapshotInfo;
41:
42: #define BDRV_O_RDONLY 0x0000
43: #define BDRV_O_RDWR 0x0002
44: #define BDRV_O_ACCESS 0x0003
45: #define BDRV_O_CREAT 0x0004 /* create an empty file */
46: #define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */
47: #define BDRV_O_FILE 0x0010 /* open as a raw file (do not try to
48: use a disk image format on top of
49: it (default for
50: bdrv_file_open()) */
1.1.1.2 root 51: #define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */
52: #define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */
53: #define BDRV_O_CACHE_DEF 0x0080 /* use default caching */
54:
55: #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_CACHE_DEF)
1.1 root 56:
57: void bdrv_info(void);
58: void bdrv_info_stats(void);
59:
60: void bdrv_init(void);
61: BlockDriver *bdrv_find_format(const char *format_name);
62: int bdrv_create(BlockDriver *drv,
63: const char *filename, int64_t size_in_sectors,
64: const char *backing_file, int flags);
65: BlockDriverState *bdrv_new(const char *device_name);
66: void bdrv_delete(BlockDriverState *bs);
67: int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags);
68: int bdrv_open(BlockDriverState *bs, const char *filename, int flags);
69: int bdrv_open2(BlockDriverState *bs, const char *filename, int flags,
70: BlockDriver *drv);
71: void bdrv_close(BlockDriverState *bs);
72: int bdrv_read(BlockDriverState *bs, int64_t sector_num,
73: uint8_t *buf, int nb_sectors);
74: int bdrv_write(BlockDriverState *bs, int64_t sector_num,
75: const uint8_t *buf, int nb_sectors);
76: int bdrv_pread(BlockDriverState *bs, int64_t offset,
77: void *buf, int count);
78: int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
79: const void *buf, int count);
80: int bdrv_truncate(BlockDriverState *bs, int64_t offset);
81: int64_t bdrv_getlength(BlockDriverState *bs);
82: void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr);
1.1.1.2 root 83: void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs);
1.1 root 84: int bdrv_commit(BlockDriverState *bs);
85: /* async block I/O */
86: typedef struct BlockDriverAIOCB BlockDriverAIOCB;
87: typedef void BlockDriverCompletionFunc(void *opaque, int ret);
88:
1.1.1.2 root 89: BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num,
90: QEMUIOVector *iov, int nb_sectors,
91: BlockDriverCompletionFunc *cb, void *opaque);
92: BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num,
93: QEMUIOVector *iov, int nb_sectors,
94: BlockDriverCompletionFunc *cb, void *opaque);
95:
1.1 root 96: BlockDriverAIOCB *bdrv_aio_read(BlockDriverState *bs, int64_t sector_num,
97: uint8_t *buf, int nb_sectors,
98: BlockDriverCompletionFunc *cb, void *opaque);
99: BlockDriverAIOCB *bdrv_aio_write(BlockDriverState *bs, int64_t sector_num,
100: const uint8_t *buf, int nb_sectors,
101: BlockDriverCompletionFunc *cb, void *opaque);
102: void bdrv_aio_cancel(BlockDriverAIOCB *acb);
103:
104: /* Ensure contents are flushed to disk. */
105: void bdrv_flush(BlockDriverState *bs);
1.1.1.2 root 106: void bdrv_flush_all(void);
107:
108: int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
109: int *pnum);
1.1 root 110:
111: #define BDRV_TYPE_HD 0
112: #define BDRV_TYPE_CDROM 1
113: #define BDRV_TYPE_FLOPPY 2
114: #define BIOS_ATA_TRANSLATION_AUTO 0
115: #define BIOS_ATA_TRANSLATION_NONE 1
116: #define BIOS_ATA_TRANSLATION_LBA 2
117: #define BIOS_ATA_TRANSLATION_LARGE 3
118: #define BIOS_ATA_TRANSLATION_RECHS 4
119:
120: void bdrv_set_geometry_hint(BlockDriverState *bs,
121: int cyls, int heads, int secs);
122: void bdrv_set_type_hint(BlockDriverState *bs, int type);
123: void bdrv_set_translation_hint(BlockDriverState *bs, int translation);
124: void bdrv_get_geometry_hint(BlockDriverState *bs,
125: int *pcyls, int *pheads, int *psecs);
126: int bdrv_get_type_hint(BlockDriverState *bs);
127: int bdrv_get_translation_hint(BlockDriverState *bs);
128: int bdrv_is_removable(BlockDriverState *bs);
129: int bdrv_is_read_only(BlockDriverState *bs);
130: int bdrv_is_sg(BlockDriverState *bs);
131: int bdrv_is_inserted(BlockDriverState *bs);
132: int bdrv_media_changed(BlockDriverState *bs);
133: int bdrv_is_locked(BlockDriverState *bs);
134: void bdrv_set_locked(BlockDriverState *bs, int locked);
135: void bdrv_eject(BlockDriverState *bs, int eject_flag);
136: void bdrv_set_change_cb(BlockDriverState *bs,
137: void (*change_cb)(void *opaque), void *opaque);
138: void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size);
139: BlockDriverState *bdrv_find(const char *name);
1.1.1.3 ! root 140: void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs),
! 141: void *opaque);
1.1 root 142: int bdrv_is_encrypted(BlockDriverState *bs);
1.1.1.3 ! root 143: int bdrv_key_required(BlockDriverState *bs);
1.1 root 144: int bdrv_set_key(BlockDriverState *bs, const char *key);
1.1.1.3 ! root 145: int bdrv_query_missing_keys(void);
1.1 root 146: void bdrv_iterate_format(void (*it)(void *opaque, const char *name),
147: void *opaque);
148: const char *bdrv_get_device_name(BlockDriverState *bs);
149: int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
150: const uint8_t *buf, int nb_sectors);
151: int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi);
152:
1.1.1.3 ! root 153: const char *bdrv_get_encrypted_filename(BlockDriverState *bs);
1.1 root 154: void bdrv_get_backing_filename(BlockDriverState *bs,
155: char *filename, int filename_size);
156: int bdrv_snapshot_create(BlockDriverState *bs,
157: QEMUSnapshotInfo *sn_info);
158: int bdrv_snapshot_goto(BlockDriverState *bs,
159: const char *snapshot_id);
160: int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id);
161: int bdrv_snapshot_list(BlockDriverState *bs,
162: QEMUSnapshotInfo **psn_info);
163: char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn);
164: int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf);
165:
166: char *get_human_readable_size(char *buf, int buf_size, int64_t size);
167: int path_is_absolute(const char *path);
168: void path_combine(char *dest, int dest_size,
169: const char *base_path,
170: const char *filename);
171:
172: #endif
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