[qemu.git] / block.h

#ifndef BLOCK_H
#define BLOCK_H

/* block.c */
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()) */
#define BDRV_O_DIRECT      0x0020

#ifndef QEMU_IMG
void bdrv_info(void);
void bdrv_info_stats(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, uint64_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_sg(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);
int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf);

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
Commit	Line	Data
faf07963 PB	1	#ifndef BLOCK_H
	2	#define BLOCK_H
	3
	4	/* block.c */
faf07963 PB	5	typedef struct BlockDriver BlockDriver;
	6
	7	extern BlockDriver bdrv_raw;
	8	extern BlockDriver bdrv_host_device;
	9	extern BlockDriver bdrv_cow;
	10	extern BlockDriver bdrv_qcow;
	11	extern BlockDriver bdrv_vmdk;
	12	extern BlockDriver bdrv_cloop;
	13	extern BlockDriver bdrv_dmg;
	14	extern BlockDriver bdrv_bochs;
	15	extern BlockDriver bdrv_vpc;
	16	extern BlockDriver bdrv_vvfat;
	17	extern BlockDriver bdrv_qcow2;
	18	extern BlockDriver bdrv_parallels;
	19
	20	typedef struct BlockDriverInfo {
	21	/* in bytes, 0 if irrelevant */
	22	int cluster_size;
	23	/* offset at which the VM state can be saved (0 if not possible) */
	24	int64_t vm_state_offset;
	25	} BlockDriverInfo;
	26
	27	typedef struct QEMUSnapshotInfo {
	28	char id_str[128]; /* unique snapshot id */
	29	/* the following fields are informative. They are not needed for
	30	the consistency of the snapshot */
	31	char name[256]; /* user choosen name */
	32	uint32_t vm_state_size; /* VM state info size */
	33	uint32_t date_sec; /* UTC date of the snapshot */
	34	uint32_t date_nsec;
	35	uint64_t vm_clock_nsec; /* VM clock relative to boot */
	36	} QEMUSnapshotInfo;
	37
	38	#define BDRV_O_RDONLY 0x0000
	39	#define BDRV_O_RDWR 0x0002
	40	#define BDRV_O_ACCESS 0x0003
	41	#define BDRV_O_CREAT 0x0004 /* create an empty file */
	42	#define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */
	43	#define BDRV_O_FILE 0x0010 /* open as a raw file (do not try to
	44	use a disk image format on top of
	45	it (default for
	46	bdrv_file_open()) */
33f00271	47	#define BDRV_O_DIRECT 0x0020
faf07963 PB	48
	49	#ifndef QEMU_IMG
	50	void bdrv_info(void);
a36e69dd	51	void bdrv_info_stats(void);
faf07963 PB	52	#endif
	53
	54	void bdrv_init(void);
	55	BlockDriver bdrv_find_format(const char format_name);
	56	int bdrv_create(BlockDriver *drv,
	57	const char *filename, int64_t size_in_sectors,
	58	const char *backing_file, int flags);
	59	BlockDriverState bdrv_new(const char device_name);
	60	void bdrv_delete(BlockDriverState *bs);
	61	int bdrv_file_open(BlockDriverState *pbs, const char filename, int flags);
	62	int bdrv_open(BlockDriverState bs, const char filename, int flags);
	63	int bdrv_open2(BlockDriverState bs, const char filename, int flags,
	64	BlockDriver *drv);
	65	void bdrv_close(BlockDriverState *bs);
	66	int bdrv_read(BlockDriverState *bs, int64_t sector_num,
	67	uint8_t *buf, int nb_sectors);
	68	int bdrv_write(BlockDriverState *bs, int64_t sector_num,
	69	const uint8_t *buf, int nb_sectors);
	70	int bdrv_pread(BlockDriverState *bs, int64_t offset,
	71	void *buf, int count);
	72	int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
	73	const void *buf, int count);
	74	int bdrv_truncate(BlockDriverState *bs, int64_t offset);
	75	int64_t bdrv_getlength(BlockDriverState *bs);
96b8f136	76	void bdrv_get_geometry(BlockDriverState bs, uint64_t nb_sectors_ptr);
faf07963 PB	77	int bdrv_commit(BlockDriverState *bs);
	78	void bdrv_set_boot_sector(BlockDriverState bs, const uint8_t data, int size);
	79	/* async block I/O */
	80	typedef struct BlockDriverAIOCB BlockDriverAIOCB;
	81	typedef void BlockDriverCompletionFunc(void *opaque, int ret);
	82
	83	BlockDriverAIOCB bdrv_aio_read(BlockDriverState bs, int64_t sector_num,
	84	uint8_t *buf, int nb_sectors,
	85	BlockDriverCompletionFunc cb, void opaque);
	86	BlockDriverAIOCB bdrv_aio_write(BlockDriverState bs, int64_t sector_num,
	87	const uint8_t *buf, int nb_sectors,
	88	BlockDriverCompletionFunc cb, void opaque);
	89	void bdrv_aio_cancel(BlockDriverAIOCB *acb);
	90
	91	void qemu_aio_init(void);
	92	void qemu_aio_poll(void);
	93	void qemu_aio_flush(void);
	94	void qemu_aio_wait_start(void);
	95	void qemu_aio_wait(void);
	96	void qemu_aio_wait_end(void);
	97
	98	int qemu_key_check(BlockDriverState bs, const char name);
	99
	100	/* Ensure contents are flushed to disk. */
	101	void bdrv_flush(BlockDriverState *bs);
	102
	103	#define BDRV_TYPE_HD 0
	104	#define BDRV_TYPE_CDROM 1
	105	#define BDRV_TYPE_FLOPPY 2
	106	#define BIOS_ATA_TRANSLATION_AUTO 0
	107	#define BIOS_ATA_TRANSLATION_NONE 1
	108	#define BIOS_ATA_TRANSLATION_LBA 2
	109	#define BIOS_ATA_TRANSLATION_LARGE 3
	110	#define BIOS_ATA_TRANSLATION_RECHS 4
	111
	112	void bdrv_set_geometry_hint(BlockDriverState *bs,
	113	int cyls, int heads, int secs);
	114	void bdrv_set_type_hint(BlockDriverState *bs, int type);
	115	void bdrv_set_translation_hint(BlockDriverState *bs, int translation);
	116	void bdrv_get_geometry_hint(BlockDriverState *bs,
	117	int pcyls, int pheads, int *psecs);
	118	int bdrv_get_type_hint(BlockDriverState *bs);
	119	int bdrv_get_translation_hint(BlockDriverState *bs);
	120	int bdrv_is_removable(BlockDriverState *bs);
	121	int bdrv_is_read_only(BlockDriverState *bs);
985a03b0	122	int bdrv_is_sg(BlockDriverState *bs);
faf07963 PB	123	int bdrv_is_inserted(BlockDriverState *bs);
	124	int bdrv_media_changed(BlockDriverState *bs);
	125	int bdrv_is_locked(BlockDriverState *bs);
	126	void bdrv_set_locked(BlockDriverState *bs, int locked);
	127	void bdrv_eject(BlockDriverState *bs, int eject_flag);
	128	void bdrv_set_change_cb(BlockDriverState *bs,
	129	void (change_cb)(void opaque), void *opaque);
	130	void bdrv_get_format(BlockDriverState bs, char buf, int buf_size);
	131	BlockDriverState bdrv_find(const char name);
	132	void bdrv_iterate(void (it)(void opaque, const char name), void opaque);
	133	int bdrv_is_encrypted(BlockDriverState *bs);
	134	int bdrv_set_key(BlockDriverState bs, const char key);
	135	void bdrv_iterate_format(void (it)(void opaque, const char *name),
	136	void *opaque);
	137	const char bdrv_get_device_name(BlockDriverState bs);
	138	int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
	139	const uint8_t *buf, int nb_sectors);
	140	int bdrv_get_info(BlockDriverState bs, BlockDriverInfo bdi);
	141
	142	void bdrv_get_backing_filename(BlockDriverState *bs,
	143	char *filename, int filename_size);
	144	int bdrv_snapshot_create(BlockDriverState *bs,
	145	QEMUSnapshotInfo *sn_info);
	146	int bdrv_snapshot_goto(BlockDriverState *bs,
	147	const char *snapshot_id);
	148	int bdrv_snapshot_delete(BlockDriverState bs, const char snapshot_id);
	149	int bdrv_snapshot_list(BlockDriverState *bs,
	150	QEMUSnapshotInfo **psn_info);
	151	char bdrv_snapshot_dump(char buf, int buf_size, QEMUSnapshotInfo *sn);
985a03b0	152	int bdrv_ioctl(BlockDriverState bs, unsigned long int req, void buf);
faf07963 PB	153
	154	char get_human_readable_size(char buf, int buf_size, int64_t size);
	155	int path_is_absolute(const char *path);
	156	void path_combine(char *dest, int dest_size,
	157	const char *base_path,
	158	const char *filename);
	159
	160	#endif