| #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_RDWR 0x0002 |
| #define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */ |
| #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_NO_FLUSH 0x0200 /* disable flushing on this disk */ |
| |
| #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB) |
| |
| #define BDRV_SECTOR_BITS 9 |
| #define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS) |
| #define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1) |
| |
| typedef enum { |
| BLOCK_ERR_REPORT, BLOCK_ERR_IGNORE, BLOCK_ERR_STOP_ENOSPC, |
| BLOCK_ERR_STOP_ANY |
| } BlockErrorAction; |
| |
| typedef enum { |
| BDRV_ACTION_REPORT, BDRV_ACTION_IGNORE, BDRV_ACTION_STOP |
| } BlockMonEventAction; |
| |
| void bdrv_mon_event(const BlockDriverState *bdrv, |
| BlockMonEventAction action, int is_read); |
| 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_protocol(const char *filename); |
| 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_create_file(const char* filename, QEMUOptionParameter *options); |
| 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, |
| BlockDriver *drv); |
| void bdrv_close(BlockDriverState *bs); |
| int bdrv_attach(BlockDriverState *bs, DeviceState *qdev); |
| void bdrv_detach(BlockDriverState *bs, DeviceState *qdev); |
| DeviceState *bdrv_get_attached(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_pwrite_sync(BlockDriverState *bs, int64_t offset, |
| const void *buf, int count); |
| int bdrv_write_sync(BlockDriverState *bs, int64_t sector_num, |
| const uint8_t *buf, int nb_sectors); |
| 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_commit_all(void); |
| int bdrv_change_backing_file(BlockDriverState *bs, |
| const char *backing_file, const char *backing_fmt); |
| void bdrv_register(BlockDriver *bdrv); |
| |
| |
| typedef struct BdrvCheckResult { |
| int corruptions; |
| int leaks; |
| int check_errors; |
| } BdrvCheckResult; |
| |
| int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res); |
| |
| /* 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); |
| void bdrv_close_all(void); |
| |
| int bdrv_has_zero_init(BlockDriverState *bs); |
| 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); |
| void bdrv_set_on_error(BlockDriverState *bs, BlockErrorAction on_read_error, |
| BlockErrorAction on_write_error); |
| BlockErrorAction bdrv_get_on_error(BlockDriverState *bs, int is_read); |
| void bdrv_set_removable(BlockDriverState *bs, int removable); |
| int bdrv_is_removable(BlockDriverState *bs); |
| int bdrv_is_read_only(BlockDriverState *bs); |
| 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); |
| BlockDriverState *bdrv_next(BlockDriverState *bs); |
| 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_can_snapshot(BlockDriverState *bs); |
| int bdrv_is_snapshot(BlockDriverState *bs); |
| BlockDriverState *bdrv_snapshots(void); |
| 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); |
| int64_t bdrv_get_dirty_count(BlockDriverState *bs); |
| |
| |
| typedef enum { |
| BLKDBG_L1_UPDATE, |
| |
| BLKDBG_L1_GROW_ALLOC_TABLE, |
| BLKDBG_L1_GROW_WRITE_TABLE, |
| BLKDBG_L1_GROW_ACTIVATE_TABLE, |
| |
| BLKDBG_L2_LOAD, |
| BLKDBG_L2_UPDATE, |
| BLKDBG_L2_UPDATE_COMPRESSED, |
| BLKDBG_L2_ALLOC_COW_READ, |
| BLKDBG_L2_ALLOC_WRITE, |
| |
| BLKDBG_READ, |
| BLKDBG_READ_AIO, |
| BLKDBG_READ_BACKING, |
| BLKDBG_READ_BACKING_AIO, |
| BLKDBG_READ_COMPRESSED, |
| |
| BLKDBG_WRITE_AIO, |
| BLKDBG_WRITE_COMPRESSED, |
| |
| BLKDBG_VMSTATE_LOAD, |
| BLKDBG_VMSTATE_SAVE, |
| |
| BLKDBG_COW_READ, |
| BLKDBG_COW_WRITE, |
| |
| BLKDBG_REFTABLE_LOAD, |
| BLKDBG_REFTABLE_GROW, |
| |
| BLKDBG_REFBLOCK_LOAD, |
| BLKDBG_REFBLOCK_UPDATE, |
| BLKDBG_REFBLOCK_UPDATE_PART, |
| BLKDBG_REFBLOCK_ALLOC, |
| BLKDBG_REFBLOCK_ALLOC_HOOKUP, |
| BLKDBG_REFBLOCK_ALLOC_WRITE, |
| BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS, |
| BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE, |
| BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE, |
| |
| BLKDBG_CLUSTER_ALLOC, |
| BLKDBG_CLUSTER_ALLOC_BYTES, |
| BLKDBG_CLUSTER_FREE, |
| |
| BLKDBG_EVENT_MAX, |
| } BlkDebugEvent; |
| |
| #define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt) |
| void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event); |
| |
| #endif |
