5eb456396d
Added a backing_format field to BlockDriverState. Added bdrv_create2 and drv->bdrv_create2 to create an image with a known backing file format. Upon bdrv_open2 if backing format is known use it, instead of probing the (backing) image. Signed-off-by: Uri Lublin <uril@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6908 c046a42c-6fe2-441c-8c8c-71466251a162
182 lines
7.7 KiB
C
182 lines
7.7 KiB
C
#ifndef BLOCK_H
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#define BLOCK_H
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#include "qemu-aio.h"
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#include "qemu-common.h"
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/* block.c */
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typedef struct BlockDriver BlockDriver;
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extern BlockDriver bdrv_raw;
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extern BlockDriver bdrv_host_device;
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extern BlockDriver bdrv_cow;
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extern BlockDriver bdrv_qcow;
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extern BlockDriver bdrv_vmdk;
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extern BlockDriver bdrv_cloop;
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extern BlockDriver bdrv_dmg;
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extern BlockDriver bdrv_bochs;
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extern BlockDriver bdrv_vpc;
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extern BlockDriver bdrv_vvfat;
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extern BlockDriver bdrv_qcow2;
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extern BlockDriver bdrv_parallels;
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extern BlockDriver bdrv_nbd;
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typedef struct BlockDriverInfo {
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/* in bytes, 0 if irrelevant */
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int cluster_size;
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/* offset at which the VM state can be saved (0 if not possible) */
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int64_t vm_state_offset;
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} BlockDriverInfo;
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typedef struct QEMUSnapshotInfo {
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char id_str[128]; /* unique snapshot id */
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/* the following fields are informative. They are not needed for
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the consistency of the snapshot */
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char name[256]; /* user choosen name */
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uint32_t vm_state_size; /* VM state info size */
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uint32_t date_sec; /* UTC date of the snapshot */
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uint32_t date_nsec;
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uint64_t vm_clock_nsec; /* VM clock relative to boot */
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} QEMUSnapshotInfo;
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#define BDRV_O_RDONLY 0x0000
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#define BDRV_O_RDWR 0x0002
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#define BDRV_O_ACCESS 0x0003
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#define BDRV_O_CREAT 0x0004 /* create an empty file */
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#define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */
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#define BDRV_O_FILE 0x0010 /* open as a raw file (do not try to
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use a disk image format on top of
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it (default for
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bdrv_file_open()) */
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#define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */
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#define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */
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#define BDRV_O_CACHE_DEF 0x0080 /* use default caching */
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#define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_CACHE_DEF)
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void bdrv_info(Monitor *mon);
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void bdrv_info_stats(Monitor *mon);
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void bdrv_init(void);
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BlockDriver *bdrv_find_format(const char *format_name);
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int bdrv_create(BlockDriver *drv,
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const char *filename, int64_t size_in_sectors,
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const char *backing_file, int flags);
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int bdrv_create2(BlockDriver *drv,
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const char *filename, int64_t size_in_sectors,
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const char *backing_file, const char *backing_format,
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int flags);
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BlockDriverState *bdrv_new(const char *device_name);
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void bdrv_delete(BlockDriverState *bs);
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int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags);
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int bdrv_open(BlockDriverState *bs, const char *filename, int flags);
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int bdrv_open2(BlockDriverState *bs, const char *filename, int flags,
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BlockDriver *drv);
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void bdrv_close(BlockDriverState *bs);
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int bdrv_read(BlockDriverState *bs, int64_t sector_num,
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uint8_t *buf, int nb_sectors);
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int bdrv_write(BlockDriverState *bs, int64_t sector_num,
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const uint8_t *buf, int nb_sectors);
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int bdrv_pread(BlockDriverState *bs, int64_t offset,
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void *buf, int count);
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int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
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const void *buf, int count);
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int bdrv_truncate(BlockDriverState *bs, int64_t offset);
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int64_t bdrv_getlength(BlockDriverState *bs);
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void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr);
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void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs);
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int bdrv_commit(BlockDriverState *bs);
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/* async block I/O */
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typedef struct BlockDriverAIOCB BlockDriverAIOCB;
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typedef void BlockDriverCompletionFunc(void *opaque, int ret);
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BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num,
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QEMUIOVector *iov, int nb_sectors,
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BlockDriverCompletionFunc *cb, void *opaque);
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BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num,
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QEMUIOVector *iov, int nb_sectors,
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BlockDriverCompletionFunc *cb, void *opaque);
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BlockDriverAIOCB *bdrv_aio_read(BlockDriverState *bs, int64_t sector_num,
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uint8_t *buf, int nb_sectors,
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BlockDriverCompletionFunc *cb, void *opaque);
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BlockDriverAIOCB *bdrv_aio_write(BlockDriverState *bs, int64_t sector_num,
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const uint8_t *buf, int nb_sectors,
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BlockDriverCompletionFunc *cb, void *opaque);
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void bdrv_aio_cancel(BlockDriverAIOCB *acb);
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/* sg packet commands */
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int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf);
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BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs,
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unsigned long int req, void *buf,
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BlockDriverCompletionFunc *cb, void *opaque);
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/* Ensure contents are flushed to disk. */
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void bdrv_flush(BlockDriverState *bs);
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void bdrv_flush_all(void);
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int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
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int *pnum);
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#define BDRV_TYPE_HD 0
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#define BDRV_TYPE_CDROM 1
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#define BDRV_TYPE_FLOPPY 2
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#define BIOS_ATA_TRANSLATION_AUTO 0
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#define BIOS_ATA_TRANSLATION_NONE 1
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#define BIOS_ATA_TRANSLATION_LBA 2
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#define BIOS_ATA_TRANSLATION_LARGE 3
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#define BIOS_ATA_TRANSLATION_RECHS 4
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void bdrv_set_geometry_hint(BlockDriverState *bs,
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int cyls, int heads, int secs);
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void bdrv_set_type_hint(BlockDriverState *bs, int type);
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void bdrv_set_translation_hint(BlockDriverState *bs, int translation);
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void bdrv_get_geometry_hint(BlockDriverState *bs,
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int *pcyls, int *pheads, int *psecs);
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int bdrv_get_type_hint(BlockDriverState *bs);
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int bdrv_get_translation_hint(BlockDriverState *bs);
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int bdrv_is_removable(BlockDriverState *bs);
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int bdrv_is_read_only(BlockDriverState *bs);
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int bdrv_is_sg(BlockDriverState *bs);
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int bdrv_is_inserted(BlockDriverState *bs);
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int bdrv_media_changed(BlockDriverState *bs);
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int bdrv_is_locked(BlockDriverState *bs);
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void bdrv_set_locked(BlockDriverState *bs, int locked);
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void bdrv_eject(BlockDriverState *bs, int eject_flag);
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void bdrv_set_change_cb(BlockDriverState *bs,
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void (*change_cb)(void *opaque), void *opaque);
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void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size);
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BlockDriverState *bdrv_find(const char *name);
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void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs),
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void *opaque);
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int bdrv_is_encrypted(BlockDriverState *bs);
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int bdrv_key_required(BlockDriverState *bs);
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int bdrv_set_key(BlockDriverState *bs, const char *key);
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int bdrv_query_missing_keys(void);
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void bdrv_iterate_format(void (*it)(void *opaque, const char *name),
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void *opaque);
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const char *bdrv_get_device_name(BlockDriverState *bs);
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int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
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const uint8_t *buf, int nb_sectors);
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int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi);
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const char *bdrv_get_encrypted_filename(BlockDriverState *bs);
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void bdrv_get_backing_filename(BlockDriverState *bs,
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char *filename, int filename_size);
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int bdrv_snapshot_create(BlockDriverState *bs,
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QEMUSnapshotInfo *sn_info);
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int bdrv_snapshot_goto(BlockDriverState *bs,
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const char *snapshot_id);
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int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id);
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int bdrv_snapshot_list(BlockDriverState *bs,
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QEMUSnapshotInfo **psn_info);
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char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn);
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char *get_human_readable_size(char *buf, int buf_size, int64_t size);
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int path_is_absolute(const char *path);
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void path_combine(char *dest, int dest_size,
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const char *base_path,
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const char *filename);
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#endif
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