forked from Miroirs/x49gp
187 lines
6.7 KiB
C
187 lines
6.7 KiB
C
/* $Id: block.h,v 1.1 2008/12/11 12:18:17 ecd Exp $
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*/
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#ifndef BLOCK_H
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#define BLOCK_H 1
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#include <stdint.h>
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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
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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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#ifdef QEMU_OLD
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typedef struct BlockDriverState BlockDriverState;
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#endif
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typedef struct BlockDriver BlockDriver;
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typedef struct SnapshotInfo QEMUSnapshotInfo;
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typedef struct BlockDriverInfo BlockDriverInfo;
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typedef struct BlockDriverAIOCB BlockDriverAIOCB;
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typedef void BlockDriverCompletionFunc(void *opaque, int ret);
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extern BlockDriver bdrv_raw;
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extern BlockDriver bdrv_host_device;
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extern BlockDriver bdrv_qcow;
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extern BlockDriver bdrv_vvfat;
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void bdrv_init(void);
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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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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_read(BlockDriverState *bs, int64_t sector_num,
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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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#ifdef QEMU_OLD
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struct BlockDriver {
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const char *format_name;
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int instance_size;
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int (*bdrv_probe)(const uint8_t *buf, int buf_size, const char *filename);
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int (*bdrv_open)(BlockDriverState *bs, const char *filename, int flags);
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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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void (*bdrv_close)(BlockDriverState *bs);
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int (*bdrv_create)(const char *filename, int64_t total_sectors,
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const char *backing_file, int flags);
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void (*bdrv_flush)(BlockDriverState *bs);
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int (*bdrv_is_allocated)(BlockDriverState *bs, int64_t sector_num,
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int nb_sectors, int *pnum);
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int (*bdrv_set_key)(BlockDriverState *bs, const char *key);
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int (*bdrv_make_empty)(BlockDriverState *bs);
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/* aio */
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BlockDriverAIOCB *(*bdrv_aio_read)(BlockDriverState *bs,
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int64_t sector_num, uint8_t *buf, int nb_sectors,
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BlockDriverCompletionFunc *cb, void *opaque);
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BlockDriverAIOCB *(*bdrv_aio_write)(BlockDriverState *bs,
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int64_t sector_num, 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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int aiocb_size;
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const char *protocol_name;
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int (*bdrv_pread)(BlockDriverState *bs, int64_t offset,
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uint8_t *buf, int count);
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int (*bdrv_pwrite)(BlockDriverState *bs, int64_t offset,
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const uint8_t *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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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_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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int (*bdrv_get_info)(BlockDriverState *bs, BlockDriverInfo *bdi);
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/* removable device specific */
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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_eject)(BlockDriverState *bs, int eject_flag);
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int (*bdrv_set_locked)(BlockDriverState *bs, int locked);
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BlockDriverAIOCB *free_aiocb;
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struct BlockDriver *next;
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};
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struct BlockDriverState {
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int64_t total_sectors; /* if we are reading a disk image, give its
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size in sectors */
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int read_only; /* if true, the media is read only */
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int removable; /* if true, the media can be removed */
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int locked; /* if true, the media cannot temporarily be ejected */
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int encrypted; /* if true, the media is encrypted */
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/* event callback when inserting/removing */
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void (*change_cb)(void *opaque);
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void *change_opaque;
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BlockDriver *drv; /* NULL means no media */
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void *opaque;
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int boot_sector_enabled;
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uint8_t boot_sector_data[512];
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char filename[1024];
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char backing_file[1024]; /* if non zero, the image is a diff of
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this file image */
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int is_temporary;
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int media_changed;
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BlockDriverState *backing_hd;
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// /* async read/write emulation */
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//
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// void *sync_aiocb;
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/* NOTE: the following infos are only hints for real hardware
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drivers. They are not used by the block driver */
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int cyls, heads, secs, translation;
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int type;
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char device_name[32];
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BlockDriverState *next;
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};
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void *qemu_malloc(size_t size);
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void *qemu_mallocz(size_t size);
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void qemu_free(void *ptr);
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void pstrcpy(char *buf, int buf_size, const char *str);
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char *pstrcat(char *buf, int buf_size, const char *s);
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int strstart(const char *str, const char *val, const char **ptr);
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int stristart(const char *str, const char *val, const char **ptr);
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#endif /* QEMU_OLD */
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#ifndef QEMU_OLD
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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_flush(BlockDriverState *bs);
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/* timers */
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typedef struct QEMUClock QEMUClock;
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typedef void QEMUTimerCB(void *opaque);
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/* The real time clock should be used only for stuff which does not
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change the virtual machine state, as it is run even if the virtual
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machine is stopped. The real time clock has a frequency of 1000
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Hz. */
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extern QEMUClock *rt_clock;
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int64_t qemu_get_clock(QEMUClock *clock);
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QEMUTimer *qemu_new_timer(QEMUClock *clock, QEMUTimerCB *cb, void *opaque);
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void qemu_del_timer(QEMUTimer *ts);
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void qemu_mod_timer(QEMUTimer *ts, int64_t expire_time);
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int qemu_timer_pending(QEMUTimer *ts);
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extern int64_t ticks_per_sec;
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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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};
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#endif
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#endif /* !(BLOCK_H) */
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