diff options
Diffstat (limited to 'block.h')
| -rw-r--r-- | block.h | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/block.h b/block.h new file mode 100644 index 0000000000..42baf11f4f --- /dev/null +++ b/block.h @@ -0,0 +1,157 @@ +#ifndef BLOCK_H +#define BLOCK_H + +/* block.c */ +typedef struct BlockDriverState BlockDriverState; +typedef struct BlockDriver BlockDriver; + +extern BlockDriver bdrv_raw; +extern BlockDriver bdrv_host_device; +extern BlockDriver bdrv_cow; +extern BlockDriver bdrv_qcow; +extern BlockDriver bdrv_vmdk; +extern BlockDriver bdrv_cloop; +extern BlockDriver bdrv_dmg; +extern BlockDriver bdrv_bochs; +extern BlockDriver bdrv_vpc; +extern BlockDriver bdrv_vvfat; +extern BlockDriver bdrv_qcow2; +extern BlockDriver bdrv_parallels; + +typedef struct BlockDriverInfo { + /* in bytes, 0 if irrelevant */ + int cluster_size; + /* offset at which the VM state can be saved (0 if not possible) */ + int64_t vm_state_offset; +} BlockDriverInfo; + +typedef struct QEMUSnapshotInfo { + char id_str[128]; /* unique snapshot id */ + /* the following fields are informative. They are not needed for + the consistency of the snapshot */ + char name[256]; /* user choosen name */ + uint32_t vm_state_size; /* VM state info size */ + uint32_t date_sec; /* UTC date of the snapshot */ + uint32_t date_nsec; + uint64_t vm_clock_nsec; /* VM clock relative to boot */ +} QEMUSnapshotInfo; + +#define BDRV_O_RDONLY 0x0000 +#define BDRV_O_RDWR 0x0002 +#define BDRV_O_ACCESS 0x0003 +#define BDRV_O_CREAT 0x0004 /* create an empty file */ +#define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */ +#define BDRV_O_FILE 0x0010 /* open as a raw file (do not try to + use a disk image format on top of + it (default for + bdrv_file_open()) */ + +#ifndef QEMU_IMG +void bdrv_info(void); +#endif + +void bdrv_init(void); +BlockDriver *bdrv_find_format(const char *format_name); +int bdrv_create(BlockDriver *drv, + const char *filename, int64_t size_in_sectors, + const char *backing_file, int flags); +BlockDriverState *bdrv_new(const char *device_name); +void bdrv_delete(BlockDriverState *bs); +int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags); +int bdrv_open(BlockDriverState *bs, const char *filename, int flags); +int bdrv_open2(BlockDriverState *bs, const char *filename, int flags, + BlockDriver *drv); +void bdrv_close(BlockDriverState *bs); +int bdrv_read(BlockDriverState *bs, int64_t sector_num, + uint8_t *buf, int nb_sectors); +int bdrv_write(BlockDriverState *bs, int64_t sector_num, + const uint8_t *buf, int nb_sectors); +int bdrv_pread(BlockDriverState *bs, int64_t offset, + void *buf, int count); +int bdrv_pwrite(BlockDriverState *bs, int64_t offset, + const void *buf, int count); +int bdrv_truncate(BlockDriverState *bs, int64_t offset); +int64_t bdrv_getlength(BlockDriverState *bs); +void bdrv_get_geometry(BlockDriverState *bs, int64_t *nb_sectors_ptr); +int bdrv_commit(BlockDriverState *bs); +void bdrv_set_boot_sector(BlockDriverState *bs, const uint8_t *data, int size); +/* async block I/O */ +typedef struct BlockDriverAIOCB BlockDriverAIOCB; +typedef void BlockDriverCompletionFunc(void *opaque, int ret); + +BlockDriverAIOCB *bdrv_aio_read(BlockDriverState *bs, int64_t sector_num, + uint8_t *buf, int nb_sectors, + BlockDriverCompletionFunc *cb, void *opaque); +BlockDriverAIOCB *bdrv_aio_write(BlockDriverState *bs, int64_t sector_num, + const uint8_t *buf, int nb_sectors, + BlockDriverCompletionFunc *cb, void *opaque); +void bdrv_aio_cancel(BlockDriverAIOCB *acb); + +void qemu_aio_init(void); +void qemu_aio_poll(void); +void qemu_aio_flush(void); +void qemu_aio_wait_start(void); +void qemu_aio_wait(void); +void qemu_aio_wait_end(void); + +int qemu_key_check(BlockDriverState *bs, const char *name); + +/* Ensure contents are flushed to disk. */ +void bdrv_flush(BlockDriverState *bs); + +#define BDRV_TYPE_HD 0 +#define BDRV_TYPE_CDROM 1 +#define BDRV_TYPE_FLOPPY 2 +#define BIOS_ATA_TRANSLATION_AUTO 0 +#define BIOS_ATA_TRANSLATION_NONE 1 +#define BIOS_ATA_TRANSLATION_LBA 2 +#define BIOS_ATA_TRANSLATION_LARGE 3 +#define BIOS_ATA_TRANSLATION_RECHS 4 + +void bdrv_set_geometry_hint(BlockDriverState *bs, + int cyls, int heads, int secs); +void bdrv_set_type_hint(BlockDriverState *bs, int type); +void bdrv_set_translation_hint(BlockDriverState *bs, int translation); +void bdrv_get_geometry_hint(BlockDriverState *bs, + int *pcyls, int *pheads, int *psecs); +int bdrv_get_type_hint(BlockDriverState *bs); +int bdrv_get_translation_hint(BlockDriverState *bs); +int bdrv_is_removable(BlockDriverState *bs); +int bdrv_is_read_only(BlockDriverState *bs); +int bdrv_is_inserted(BlockDriverState *bs); +int bdrv_media_changed(BlockDriverState *bs); +int bdrv_is_locked(BlockDriverState *bs); +void bdrv_set_locked(BlockDriverState *bs, int locked); +void bdrv_eject(BlockDriverState *bs, int eject_flag); +void bdrv_set_change_cb(BlockDriverState *bs, + void (*change_cb)(void *opaque), void *opaque); +void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size); +BlockDriverState *bdrv_find(const char *name); +void bdrv_iterate(void (*it)(void *opaque, const char *name), void *opaque); +int bdrv_is_encrypted(BlockDriverState *bs); +int bdrv_set_key(BlockDriverState *bs, const char *key); +void bdrv_iterate_format(void (*it)(void *opaque, const char *name), + void *opaque); +const char *bdrv_get_device_name(BlockDriverState *bs); +int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, + const uint8_t *buf, int nb_sectors); +int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi); + +void bdrv_get_backing_filename(BlockDriverState *bs, + char *filename, int filename_size); +int bdrv_snapshot_create(BlockDriverState *bs, + QEMUSnapshotInfo *sn_info); +int bdrv_snapshot_goto(BlockDriverState *bs, + const char *snapshot_id); +int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id); +int bdrv_snapshot_list(BlockDriverState *bs, + QEMUSnapshotInfo **psn_info); +char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn); + +char *get_human_readable_size(char *buf, int buf_size, int64_t size); +int path_is_absolute(const char *path); +void path_combine(char *dest, int dest_size, + const char *base_path, + const char *filename); + +#endif |