Archipelago » qemu

#ifndef BLOCK_H

#define BLOCK_H

#include "qemu-aio.h"

#include "qemu-common.h"

#include "qemu-option.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_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(Monitor *mon);

void bdrv_info_stats(Monitor *mon);

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