root / block_int.h @ 94909d9f
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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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typedef struct AIOPool { |
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void (*cancel)(BlockDriverAIOCB *acb);
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int aiocb_size;
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BlockDriverAIOCB *free_aiocb; |
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} AIOPool; |
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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_readv)(BlockDriverState *bs, |
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int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
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BlockDriverCompletionFunc *cb, void *opaque);
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BlockDriverAIOCB *(*bdrv_aio_writev)(BlockDriverState *bs, |
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int64_t sector_num, QEMUIOVector *qiov, 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_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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int (*bdrv_put_buffer)(BlockDriverState *bs, const uint8_t *buf, |
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int64_t pos, int size);
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int (*bdrv_get_buffer)(BlockDriverState *bs, uint8_t *buf,
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int64_t pos, int size);
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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 *(*bdrv_aio_ioctl)(BlockDriverState *bs, |
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unsigned long int req, void *buf, |
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BlockDriverCompletionFunc *cb, void *opaque);
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AIOPool aio_pool; |
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/* new create with backing file format */
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int (*bdrv_create2)(const char *filename, int64_t total_sectors, |
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const char *backing_file, const char *backing_format, |
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int flags);
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/* Returns number of errors in image, -errno for internal errors */
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int (*bdrv_check)(BlockDriverState* bs);
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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 valid_key; /* if true, a valid encryption key has been set */ |
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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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char backing_format[16]; /* if non-zero and backing_file exists */ |
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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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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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/* Whether the disk can expand beyond total_sectors */
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int growable;
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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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void *private;
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}; |
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struct BlockDriverAIOCB {
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AIOPool *pool; |
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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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void aio_pool_init(AIOPool *pool, int aiocb_size, |
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void (*cancel)(BlockDriverAIOCB *acb));
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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_get_pool(AIOPool *pool, BlockDriverState *bs,
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BlockDriverCompletionFunc *cb, void *opaque);
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void qemu_aio_release(void *p); |
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extern BlockDriverState *bdrv_first;
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#endif /* BLOCK_INT_H */ |