symbian-qemu-0.9.1-12/qemu-symbian-svp/block_int.h
author martin.trojer@nokia.com
Fri, 31 Jul 2009 15:01:17 +0100
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permissions -rw-r--r--
Initial QEMU (symbian-qemu-0.9.1-12) import
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/*
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 * QEMU System Emulator block driver
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 *
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 * Copyright (c) 2003 Fabrice Bellard
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy
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 * of this software and associated documentation files (the "Software"), to deal
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 * in the Software without restriction, including without limitation the rights
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 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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 * copies of the Software, and to permit persons to whom the Software is
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 * furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice shall be included in
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 * all copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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 * THE SOFTWARE.
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 */
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#ifndef BLOCK_INT_H
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#define BLOCK_INT_H
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#include "block.h"
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#define BLOCK_FLAG_ENCRYPT	1
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#define BLOCK_FLAG_COMPRESS	2
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#define BLOCK_FLAG_COMPAT6	4
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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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    /* to control generic scsi devices */
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    int (*bdrv_ioctl)(BlockDriverState *bs, unsigned long int req, void *buf);
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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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    int sg;        /* if true, the device is a /dev/sg* */
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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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    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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2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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    void *sync_aiocb;
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    /* I/O stats (display with "info blockstats"). */
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    uint64_t rd_bytes;
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    uint64_t wr_bytes;
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    uint64_t rd_ops;
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    uint64_t wr_ops;
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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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struct BlockDriverAIOCB {
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    BlockDriverState *bs;
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    BlockDriverCompletionFunc *cb;
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    void *opaque;
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    BlockDriverAIOCB *next;
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};
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void get_tmp_filename(char *filename, int size);
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2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb,
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                   void *opaque);
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void qemu_aio_release(void *p);
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2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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extern BlockDriverState *bdrv_first;
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   146
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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#endif /* BLOCK_INT_H */