File:  [Qemu by Fabrice Bellard] / qemu / block.h
Revision 1.1.1.1 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 16:47:31 2018 UTC (3 years ago) by root
Branches: qemu, MAIN
CVS tags: qemu0091, HEAD
qemu 0.9.1

    1: #ifndef BLOCK_H
    2: #define BLOCK_H
    3: 
    4: /* block.c */
    5: typedef struct BlockDriver BlockDriver;
    6: 
    7: extern BlockDriver bdrv_raw;
    8: extern BlockDriver bdrv_host_device;
    9: extern BlockDriver bdrv_cow;
   10: extern BlockDriver bdrv_qcow;
   11: extern BlockDriver bdrv_vmdk;
   12: extern BlockDriver bdrv_cloop;
   13: extern BlockDriver bdrv_dmg;
   14: extern BlockDriver bdrv_bochs;
   15: extern BlockDriver bdrv_vpc;
   16: extern BlockDriver bdrv_vvfat;
   17: extern BlockDriver bdrv_qcow2;
   18: extern BlockDriver bdrv_parallels;
   19: 
   20: typedef struct BlockDriverInfo {
   21:     /* in bytes, 0 if irrelevant */
   22:     int cluster_size;
   23:     /* offset at which the VM state can be saved (0 if not possible) */
   24:     int64_t vm_state_offset;
   25: } BlockDriverInfo;
   26: 
   27: typedef struct QEMUSnapshotInfo {
   28:     char id_str[128]; /* unique snapshot id */
   29:     /* the following fields are informative. They are not needed for
   30:        the consistency of the snapshot */
   31:     char name[256]; /* user choosen name */
   32:     uint32_t vm_state_size; /* VM state info size */
   33:     uint32_t date_sec; /* UTC date of the snapshot */
   34:     uint32_t date_nsec;
   35:     uint64_t vm_clock_nsec; /* VM clock relative to boot */
   36: } QEMUSnapshotInfo;
   37: 
   38: #define BDRV_O_RDONLY      0x0000
   39: #define BDRV_O_RDWR        0x0002
   40: #define BDRV_O_ACCESS      0x0003
   41: #define BDRV_O_CREAT       0x0004 /* create an empty file */
   42: #define BDRV_O_SNAPSHOT    0x0008 /* open the file read only and save writes in a snapshot */
   43: #define BDRV_O_FILE        0x0010 /* open as a raw file (do not try to
   44:                                      use a disk image format on top of
   45:                                      it (default for
   46:                                      bdrv_file_open()) */
   47: #define BDRV_O_DIRECT      0x0020
   48: 
   49: #ifndef QEMU_IMG
   50: void bdrv_info(void);
   51: void bdrv_info_stats(void);
   52: #endif
   53: 
   54: void bdrv_init(void);
   55: BlockDriver *bdrv_find_format(const char *format_name);
   56: int bdrv_create(BlockDriver *drv,
   57:                 const char *filename, int64_t size_in_sectors,
   58:                 const char *backing_file, int flags);
   59: BlockDriverState *bdrv_new(const char *device_name);
   60: void bdrv_delete(BlockDriverState *bs);
   61: int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags);
   62: int bdrv_open(BlockDriverState *bs, const char *filename, int flags);
   63: int bdrv_open2(BlockDriverState *bs, const char *filename, int flags,
   64:                BlockDriver *drv);
   65: void bdrv_close(BlockDriverState *bs);
   66: int bdrv_read(BlockDriverState *bs, int64_t sector_num,
   67:               uint8_t *buf, int nb_sectors);
   68: int bdrv_write(BlockDriverState *bs, int64_t sector_num,
   69:                const uint8_t *buf, int nb_sectors);
   70: int bdrv_pread(BlockDriverState *bs, int64_t offset,
   71:                void *buf, int count);
   72: int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
   73:                 const void *buf, int count);
   74: int bdrv_truncate(BlockDriverState *bs, int64_t offset);
   75: int64_t bdrv_getlength(BlockDriverState *bs);
   76: void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr);
   77: int bdrv_commit(BlockDriverState *bs);
   78: void bdrv_set_boot_sector(BlockDriverState *bs, const uint8_t *data, int size);
   79: /* async block I/O */
   80: typedef struct BlockDriverAIOCB BlockDriverAIOCB;
   81: typedef void BlockDriverCompletionFunc(void *opaque, int ret);
   82: 
   83: BlockDriverAIOCB *bdrv_aio_read(BlockDriverState *bs, int64_t sector_num,
   84:                                 uint8_t *buf, int nb_sectors,
   85:                                 BlockDriverCompletionFunc *cb, void *opaque);
   86: BlockDriverAIOCB *bdrv_aio_write(BlockDriverState *bs, int64_t sector_num,
   87:                                  const uint8_t *buf, int nb_sectors,
   88:                                  BlockDriverCompletionFunc *cb, void *opaque);
   89: void bdrv_aio_cancel(BlockDriverAIOCB *acb);
   90: 
   91: void qemu_aio_init(void);
   92: void qemu_aio_poll(void);
   93: void qemu_aio_flush(void);
   94: void qemu_aio_wait_start(void);
   95: void qemu_aio_wait(void);
   96: void qemu_aio_wait_end(void);
   97: 
   98: int qemu_key_check(BlockDriverState *bs, const char *name);
   99: 
  100: /* Ensure contents are flushed to disk.  */
  101: void bdrv_flush(BlockDriverState *bs);
  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);
  122: int bdrv_is_sg(BlockDriverState *bs);
  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);
  152: int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf);
  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

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