From 8b23a6c7e1aee255004dd19098d4c2462b61b849 Mon Sep 17 00:00:00 2001 From: The Android Open Source Project Date: Tue, 3 Mar 2009 19:30:32 -0800 Subject: auto import from //depot/cupcake/@135843 --- block_int.h | 150 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 150 insertions(+) create mode 100644 block_int.h (limited to 'block_int.h') diff --git a/block_int.h b/block_int.h new file mode 100644 index 0000000..137000e --- /dev/null +++ b/block_int.h @@ -0,0 +1,150 @@ +/* + * 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 4 + +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 */ + 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 */ -- cgit v1.1