Git Repo - qemu.git/blame_incremental

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Commit	Line	Data
	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	#define BDRV_SECTOR_BITS 9
	45	#define BDRV_SECTOR_SIZE (1 << BDRV_SECTOR_BITS)
	46	#define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1);
	47
	48	void bdrv_info(Monitor *mon);
	49	void bdrv_info_stats(Monitor *mon);
	50
	51	void bdrv_init(void);
	52	void bdrv_init_with_whitelist(void);
	53	BlockDriver bdrv_find_format(const char format_name);
	54	BlockDriver bdrv_find_whitelisted_format(const char format_name);
	55	int bdrv_create(BlockDriver drv, const char filename,
	56	QEMUOptionParameter *options);
	57	int bdrv_create2(BlockDriver *drv,
	58	const char *filename, int64_t size_in_sectors,
	59	const char backing_file, const char backing_format,
	60	int flags);
	61	BlockDriverState bdrv_new(const char device_name);
	62	void bdrv_delete(BlockDriverState *bs);
	63	int bdrv_file_open(BlockDriverState *pbs, const char filename, int flags);
	64	int bdrv_open(BlockDriverState bs, const char filename, int flags);
	65	int bdrv_open2(BlockDriverState bs, const char filename, int flags,
	66	BlockDriver *drv);
	67	void bdrv_close(BlockDriverState *bs);
	68	int bdrv_check(BlockDriverState *bs);
	69	int bdrv_read(BlockDriverState *bs, int64_t sector_num,
	70	uint8_t *buf, int nb_sectors);
	71	int bdrv_write(BlockDriverState *bs, int64_t sector_num,
	72	const uint8_t *buf, int nb_sectors);
	73	int bdrv_pread(BlockDriverState *bs, int64_t offset,
	74	void *buf, int count);
	75	int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
	76	const void *buf, int count);
	77	int bdrv_truncate(BlockDriverState *bs, int64_t offset);
	78	int64_t bdrv_getlength(BlockDriverState *bs);
	79	void bdrv_get_geometry(BlockDriverState bs, uint64_t nb_sectors_ptr);
	80	void bdrv_guess_geometry(BlockDriverState bs, int pcyls, int pheads, int psecs);
	81	int bdrv_commit(BlockDriverState *bs);
	82	void bdrv_register(BlockDriver *bdrv);
	83
	84	/* async block I/O */
	85	typedef struct BlockDriverAIOCB BlockDriverAIOCB;
	86	typedef void BlockDriverCompletionFunc(void *opaque, int ret);
	87	typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector,
	88	int sector_num);
	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	BlockDriverAIOCB bdrv_aio_flush(BlockDriverState bs,
	96	BlockDriverCompletionFunc cb, void opaque);
	97	void bdrv_aio_cancel(BlockDriverAIOCB *acb);
	98
	99	typedef struct BlockRequest {
	100	/* Fields to be filled by multiwrite caller */
	101	int64_t sector;
	102	int nb_sectors;
	103	QEMUIOVector *qiov;
	104	BlockDriverCompletionFunc *cb;
	105	void *opaque;
	106
	107	/* Filled by multiwrite implementation */
	108	int error;
	109	} BlockRequest;
	110
	111	int bdrv_aio_multiwrite(BlockDriverState bs, BlockRequest reqs,
	112	int num_reqs);
	113
	114	/* sg packet commands */
	115	int bdrv_ioctl(BlockDriverState bs, unsigned long int req, void buf);
	116	BlockDriverAIOCB bdrv_aio_ioctl(BlockDriverState bs,
	117	unsigned long int req, void *buf,
	118	BlockDriverCompletionFunc cb, void opaque);
	119
	120	/* Ensure contents are flushed to disk. */
	121	void bdrv_flush(BlockDriverState *bs);
	122	void bdrv_flush_all(void);
	123
	124	int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
	125	int *pnum);
	126
	127	#define BDRV_TYPE_HD 0
	128	#define BDRV_TYPE_CDROM 1
	129	#define BDRV_TYPE_FLOPPY 2
	130	#define BIOS_ATA_TRANSLATION_AUTO 0
	131	#define BIOS_ATA_TRANSLATION_NONE 1
	132	#define BIOS_ATA_TRANSLATION_LBA 2
	133	#define BIOS_ATA_TRANSLATION_LARGE 3
	134	#define BIOS_ATA_TRANSLATION_RECHS 4
	135
	136	void bdrv_set_geometry_hint(BlockDriverState *bs,
	137	int cyls, int heads, int secs);
	138	void bdrv_set_type_hint(BlockDriverState *bs, int type);
	139	void bdrv_set_translation_hint(BlockDriverState *bs, int translation);
	140	void bdrv_get_geometry_hint(BlockDriverState *bs,
	141	int pcyls, int pheads, int *psecs);
	142	int bdrv_get_type_hint(BlockDriverState *bs);
	143	int bdrv_get_translation_hint(BlockDriverState *bs);
	144	int bdrv_is_removable(BlockDriverState *bs);
	145	int bdrv_is_read_only(BlockDriverState *bs);
	146	int bdrv_set_read_only(BlockDriverState *bs, int read_only);
	147	int bdrv_is_sg(BlockDriverState *bs);
	148	int bdrv_enable_write_cache(BlockDriverState *bs);
	149	int bdrv_is_inserted(BlockDriverState *bs);
	150	int bdrv_media_changed(BlockDriverState *bs);
	151	int bdrv_is_locked(BlockDriverState *bs);
	152	void bdrv_set_locked(BlockDriverState *bs, int locked);
	153	int bdrv_eject(BlockDriverState *bs, int eject_flag);
	154	void bdrv_set_change_cb(BlockDriverState *bs,
	155	void (change_cb)(void opaque), void *opaque);
	156	void bdrv_get_format(BlockDriverState bs, char buf, int buf_size);
	157	BlockDriverState bdrv_find(const char name);
	158	void bdrv_iterate(void (it)(void opaque, BlockDriverState *bs),
	159	void *opaque);
	160	int bdrv_is_encrypted(BlockDriverState *bs);
	161	int bdrv_key_required(BlockDriverState *bs);
	162	int bdrv_set_key(BlockDriverState bs, const char key);
	163	int bdrv_query_missing_keys(void);
	164	void bdrv_iterate_format(void (it)(void opaque, const char *name),
	165	void *opaque);
	166	const char bdrv_get_device_name(BlockDriverState bs);
	167	int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
	168	const uint8_t *buf, int nb_sectors);
	169	int bdrv_get_info(BlockDriverState bs, BlockDriverInfo bdi);
	170
	171	const char bdrv_get_encrypted_filename(BlockDriverState bs);
	172	void bdrv_get_backing_filename(BlockDriverState *bs,
	173	char *filename, int filename_size);
	174	int bdrv_snapshot_create(BlockDriverState *bs,
	175	QEMUSnapshotInfo *sn_info);
	176	int bdrv_snapshot_goto(BlockDriverState *bs,
	177	const char *snapshot_id);
	178	int bdrv_snapshot_delete(BlockDriverState bs, const char snapshot_id);
	179	int bdrv_snapshot_list(BlockDriverState *bs,
	180	QEMUSnapshotInfo **psn_info);
	181	char bdrv_snapshot_dump(char buf, int buf_size, QEMUSnapshotInfo *sn);
	182
	183	char get_human_readable_size(char buf, int buf_size, int64_t size);
	184	int path_is_absolute(const char *path);
	185	void path_combine(char *dest, int dest_size,
	186	const char *base_path,
	187	const char *filename);
	188
	189	int bdrv_save_vmstate(BlockDriverState bs, const uint8_t buf,
	190	int64_t pos, int size);
	191
	192	int bdrv_load_vmstate(BlockDriverState bs, uint8_t buf,
	193	int64_t pos, int size);
	194
	195	#define BDRV_SECTORS_PER_DIRTY_CHUNK 8
	196
	197	void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable);
	198	int bdrv_get_dirty(BlockDriverState *bs, int64_t sector);
	199	void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector,
	200	int nr_sectors);
	201	#endif