[qemu.git] / block.h

#ifndef BLOCK_H
#define BLOCK_H

#include "qemu-aio.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;
extern BlockDriver bdrv_nbd;

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_NOCACHE     0x0020 /* do not use the host page cache */
#define BDRV_O_CACHE_WB    0x0040 /* use write-back caching */

#define BDRV_O_CACHE_MASK  (BDRV_O_NOCACHE | BDRV_O_CACHE_WB)

void bdrv_info(void);
void bdrv_info_stats(void);

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);
/* 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);

int qemu_key_check(BlockDriverState *bs, const char *name);

/* Ensure contents are flushed to disk.  */
void bdrv_flush(BlockDriverState *bs);
void bdrv_flush_all(void);

int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
	int *pnum);

#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
a76bab49 AL	4	#include "qemu-aio.h"
a76bab49 AL	5
faf07963	6	/* block.c */
faf07963 PB	7	typedef struct BlockDriver BlockDriver;
	8
	9	extern BlockDriver bdrv_raw;
	10	extern BlockDriver bdrv_host_device;
	11	extern BlockDriver bdrv_cow;
	12	extern BlockDriver bdrv_qcow;
	13	extern BlockDriver bdrv_vmdk;
	14	extern BlockDriver bdrv_cloop;
	15	extern BlockDriver bdrv_dmg;
	16	extern BlockDriver bdrv_bochs;
	17	extern BlockDriver bdrv_vpc;
	18	extern BlockDriver bdrv_vvfat;
	19	extern BlockDriver bdrv_qcow2;
	20	extern BlockDriver bdrv_parallels;
75818250	21	extern BlockDriver bdrv_nbd;
faf07963 PB	22
	23	typedef struct BlockDriverInfo {
	24	/* in bytes, 0 if irrelevant */
	25	int cluster_size;
	26	/* offset at which the VM state can be saved (0 if not possible) */
	27	int64_t vm_state_offset;
	28	} BlockDriverInfo;
	29
	30	typedef struct QEMUSnapshotInfo {
	31	char id_str[128]; /* unique snapshot id */
	32	/* the following fields are informative. They are not needed for
	33	the consistency of the snapshot */
	34	char name[256]; /* user choosen name */
	35	uint32_t vm_state_size; /* VM state info size */
	36	uint32_t date_sec; /* UTC date of the snapshot */
	37	uint32_t date_nsec;
	38	uint64_t vm_clock_nsec; /* VM clock relative to boot */
	39	} QEMUSnapshotInfo;
	40
	41	#define BDRV_O_RDONLY 0x0000
	42	#define BDRV_O_RDWR 0x0002
	43	#define BDRV_O_ACCESS 0x0003
	44	#define BDRV_O_CREAT 0x0004 /* create an empty file */
	45	#define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */
	46	#define BDRV_O_FILE 0x0010 /* open as a raw file (do not try to
	47	use a disk image format on top of
	48	it (default for
	49	bdrv_file_open()) */
9f7965c7 AL	50	#define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */
	51	#define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */
	52
	53	#define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE \| BDRV_O_CACHE_WB)
faf07963	54
faf07963	55	void bdrv_info(void);
a36e69dd	56	void bdrv_info_stats(void);
faf07963 PB	57
	58	void bdrv_init(void);
	59	BlockDriver bdrv_find_format(const char format_name);
	60	int bdrv_create(BlockDriver *drv,
	61	const char *filename, int64_t size_in_sectors,
	62	const char *backing_file, int flags);
	63	BlockDriverState bdrv_new(const char device_name);
	64	void bdrv_delete(BlockDriverState *bs);
	65	int bdrv_file_open(BlockDriverState *pbs, const char filename, int flags);
	66	int bdrv_open(BlockDriverState bs, const char filename, int flags);
	67	int bdrv_open2(BlockDriverState bs, const char filename, int flags,
	68	BlockDriver *drv);
	69	void bdrv_close(BlockDriverState *bs);
	70	int bdrv_read(BlockDriverState *bs, int64_t sector_num,
	71	uint8_t *buf, int nb_sectors);
	72	int bdrv_write(BlockDriverState *bs, int64_t sector_num,
	73	const uint8_t *buf, int nb_sectors);
	74	int bdrv_pread(BlockDriverState *bs, int64_t offset,
	75	void *buf, int count);
	76	int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
	77	const void *buf, int count);
	78	int bdrv_truncate(BlockDriverState *bs, int64_t offset);
	79	int64_t bdrv_getlength(BlockDriverState *bs);
96b8f136	80	void bdrv_get_geometry(BlockDriverState bs, uint64_t nb_sectors_ptr);
faf07963	81	int bdrv_commit(BlockDriverState *bs);
faf07963 PB	82	/* async block I/O */
	83	typedef struct BlockDriverAIOCB BlockDriverAIOCB;
	84	typedef void BlockDriverCompletionFunc(void *opaque, int ret);
	85
	86	BlockDriverAIOCB bdrv_aio_read(BlockDriverState bs, int64_t sector_num,
	87	uint8_t *buf, int nb_sectors,
	88	BlockDriverCompletionFunc cb, void opaque);
	89	BlockDriverAIOCB bdrv_aio_write(BlockDriverState bs, int64_t sector_num,
	90	const uint8_t *buf, int nb_sectors,
	91	BlockDriverCompletionFunc cb, void opaque);
	92	void bdrv_aio_cancel(BlockDriverAIOCB *acb);
	93
faf07963 PB	94	int qemu_key_check(BlockDriverState bs, const char name);
	95
	96	/* Ensure contents are flushed to disk. */
	97	void bdrv_flush(BlockDriverState *bs);
c6ca28d6 AL	98	void bdrv_flush_all(void);
c6ca28d6 AL	99
f58c7b35 TS	100	int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
f58c7b35 TS	101	int *pnum);
faf07963 PB	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