Archipelago » qemu

/*

 * QEMU System Emulator block driver

 * 

 * Copyright (c) 2003 Fabrice Bellard

 * 

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

#ifndef BLOCK_INT_H

#define BLOCK_INT_H

struct BlockDriver {

    const char *format_name;

    int instance_size;

    int (*bdrv_probe)(const uint8_t *buf, int buf_size, const char *filename);

    int (*bdrv_open)(BlockDriverState *bs, const char *filename, int flags);

    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);

    void (*bdrv_close)(BlockDriverState *bs);

    int (*bdrv_create)(const char *filename, int64_t total_sectors, 

                       const char *backing_file, int flags);

    void (*bdrv_flush)(BlockDriverState *bs);

    int (*bdrv_is_allocated)(BlockDriverState *bs, int64_t sector_num,

                             int nb_sectors, int *pnum);

    int (*bdrv_set_key)(BlockDriverState *bs, const char *key);

    int (*bdrv_make_empty)(BlockDriverState *bs);

    /* aio */

    int (*bdrv_aio_new)(BlockDriverAIOCB *acb);

    int (*bdrv_aio_read)(BlockDriverAIOCB *acb, int64_t sector_num,

                              uint8_t *buf, int nb_sectors);

    int (*bdrv_aio_write)(BlockDriverAIOCB *acb, int64_t sector_num,

                          const uint8_t *buf, int nb_sectors);

    void (*bdrv_aio_cancel)(BlockDriverAIOCB *acb);

    void (*bdrv_aio_delete)(BlockDriverAIOCB *acb);

    const char *protocol_name;

    int (*bdrv_pread)(BlockDriverState *bs, int64_t offset, 

                      uint8_t *buf, int count);

    int (*bdrv_pwrite)(BlockDriverState *bs, int64_t offset, 

                       const uint8_t *buf, int count);

    int (*bdrv_truncate)(BlockDriverState *bs, int64_t offset);

    int64_t (*bdrv_getlength)(BlockDriverState *bs);

    struct BlockDriver *next;

};

struct BlockDriverState {

    int64_t total_sectors; /* XXX: will be suppressed */

    int read_only; /* if true, the media is read only */

    int inserted; /* if true, the media is present */

    int removable; /* if true, the media can be removed */

    int locked;    /* if true, the media cannot temporarily be ejected */

    int encrypted; /* if true, the media is encrypted */

    /* event callback when inserting/removing */

    void (*change_cb)(void *opaque);

    void *change_opaque;

    BlockDriver *drv;

    void *opaque;

    int boot_sector_enabled;

    uint8_t boot_sector_data[512];

    char filename[1024];

    char backing_file[1024]; /* if non zero, the image is a diff of

                                this file image */

    int is_temporary;

    BlockDriverState *backing_hd;

    /* sync read/write emulation */

    BlockDriverAIOCB *sync_aiocb;

    /* NOTE: the following infos are only hints for real hardware

       drivers. They are not used by the block driver */

    int cyls, heads, secs, translation;

    int type;

    char device_name[32];

    BlockDriverState *next;

};

struct BlockDriverAIOCB {

    BlockDriverState *bs;

    BlockDriverCompletionFunc *cb;

    void *cb_opaque;

    void *opaque; /* driver opaque */

};

void get_tmp_filename(char *filename, int size);

#endif /* BLOCK_INT_H */