/* * 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#include "block.h"#define BLOCK_FLAG_ENCRYPT	1#define BLOCK_FLAG_COMPRESS	2#define BLOCK_FLAG_COMPAT6	4struct 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 */    BlockDriverAIOCB *(*bdrv_aio_read)(BlockDriverState *bs,        int64_t sector_num, uint8_t *buf, int nb_sectors,        BlockDriverCompletionFunc *cb, void *opaque);    BlockDriverAIOCB *(*bdrv_aio_write)(BlockDriverState *bs,        int64_t sector_num, const uint8_t *buf, int nb_sectors,        BlockDriverCompletionFunc *cb, void *opaque);    void (*bdrv_aio_cancel)(BlockDriverAIOCB *acb);    int aiocb_size;    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);    int (*bdrv_write_compressed)(BlockDriverState *bs, int64_t sector_num,                                 const uint8_t *buf, int nb_sectors);    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);    int (*bdrv_get_info)(BlockDriverState *bs, BlockDriverInfo *bdi);    /* removable device specific */    int (*bdrv_is_inserted)(BlockDriverState *bs);    int (*bdrv_media_changed)(BlockDriverState *bs);    int (*bdrv_eject)(BlockDriverState *bs, int eject_flag);    int (*bdrv_set_locked)(BlockDriverState *bs, int locked);    /* to control generic scsi devices */    int (*bdrv_ioctl)(BlockDriverState *bs, unsigned long int req, void *buf);    BlockDriverAIOCB *free_aiocb;    struct BlockDriver *next;};struct BlockDriverState {    int64_t total_sectors; /* if we are reading a disk image, give its                              size in sectors */    int read_only; /* if true, the media is read only */    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 */    int sg;        /* if true, the device is a /dev/sg* */    /* event callback when inserting/removing */    void (*change_cb)(void *opaque);    void *change_opaque;    BlockDriver *drv; /* NULL means no media */    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;    int media_changed;    BlockDriverState *backing_hd;    /* async read/write emulation */    void *sync_aiocb;    /* I/O stats (display with "info blockstats"). */    uint64_t rd_bytes;    uint64_t wr_bytes;    uint64_t rd_ops;    uint64_t wr_ops;    /* 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 *opaque;    BlockDriverAIOCB *next;};void get_tmp_filename(char *filename, int size);void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb,                   void *opaque);void qemu_aio_release(void *p);BlockDriverState *bdrv_first;#endif /* BLOCK_INT_H */