#ifndef BLOCK_H #define BLOCK_H #include "qemu-aio.h" #include "qemu-common.h" #include "qemu-option.h" #include "qobject.h" /* block.c */ typedef struct BlockDriver BlockDriver; 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_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */ #define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */ #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB) #define BDRV_SECTOR_BITS 9 #define BDRV_SECTOR_SIZE (1 << BDRV_SECTOR_BITS) #define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1); void bdrv_info_print(Monitor *mon, const QObject *data); void bdrv_info(Monitor *mon, QObject **ret_data); void bdrv_stats_print(Monitor *mon, const QObject *data); void bdrv_info_stats(Monitor *mon, QObject **ret_data); void bdrv_init(void); void bdrv_init_with_whitelist(void); BlockDriver *bdrv_find_format(const char *format_name); BlockDriver *bdrv_find_whitelisted_format(const char *format_name); int bdrv_create(BlockDriver *drv, const char* filename, QEMUOptionParameter *options); int bdrv_create2(BlockDriver *drv, const char *filename, int64_t size_in_sectors, const char *backing_file, const char *backing_format, 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_check(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); void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs); int bdrv_commit(BlockDriverState *bs); void bdrv_register(BlockDriver *bdrv); /* async block I/O */ typedef struct BlockDriverAIOCB BlockDriverAIOCB; typedef void BlockDriverCompletionFunc(void *opaque, int ret); typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector, int sector_num); BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, QEMUIOVector *iov, int nb_sectors, BlockDriverCompletionFunc *cb, void *opaque); BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, QEMUIOVector *iov, int nb_sectors, BlockDriverCompletionFunc *cb, void *opaque); BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs, BlockDriverCompletionFunc *cb, void *opaque); void bdrv_aio_cancel(BlockDriverAIOCB *acb); typedef struct BlockRequest { /* Fields to be filled by multiwrite caller */ int64_t sector; int nb_sectors; QEMUIOVector *qiov; BlockDriverCompletionFunc *cb; void *opaque; /* Filled by multiwrite implementation */ int error; } BlockRequest; int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs, int num_reqs); /* sg packet commands */ int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf); BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, unsigned long int req, void *buf, BlockDriverCompletionFunc *cb, void *opaque); /* 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_set_read_only(BlockDriverState *bs, int read_only); int bdrv_is_sg(BlockDriverState *bs); int bdrv_enable_write_cache(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); int 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, BlockDriverState *bs), void *opaque); int bdrv_is_encrypted(BlockDriverState *bs); int bdrv_key_required(BlockDriverState *bs); int bdrv_set_key(BlockDriverState *bs, const char *key); int bdrv_query_missing_keys(void); 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); const char *bdrv_get_encrypted_filename(BlockDriverState *bs); 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); int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, int64_t pos, int size); int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf, int64_t pos, int size); #define BDRV_SECTORS_PER_DIRTY_CHUNK 2048 void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable); int bdrv_get_dirty(BlockDriverState *bs, int64_t sector); void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors); #endif