/*
* 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
#ifndef BLOCK_INT_H
#define BLOCK_INT_H
+#include "block.h"
+#include "qemu-option.h"
+
+#define BLOCK_FLAG_ENCRYPT 1
+#define BLOCK_FLAG_COMPRESS 2
+#define BLOCK_FLAG_COMPAT6 4
+
+#define BLOCK_OPT_SIZE "size"
+#define BLOCK_OPT_ENCRYPT "encryption"
+#define BLOCK_OPT_COMPAT6 "compat6"
+#define BLOCK_OPT_BACKING_FILE "backing_file"
+#define BLOCK_OPT_BACKING_FMT "backing_fmt"
+#define BLOCK_OPT_CLUSTER_SIZE "cluster_size"
+
+typedef struct AIOPool {
+ void (*cancel)(BlockDriverAIOCB *acb);
+ int aiocb_size;
+ BlockDriverAIOCB *free_aiocb;
+} AIOPool;
+
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,
+ int (*bdrv_read)(BlockDriverState *bs, int64_t sector_num,
uint8_t *buf, int nb_sectors);
- int (*bdrv_write)(BlockDriverState *bs, int64_t sector_num,
+ 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);
+ int (*bdrv_create)(const char *filename, QEMUOptionParameter *options);
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);
+ BlockDriverAIOCB *(*bdrv_aio_readv)(BlockDriverState *bs,
+ int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
+ BlockDriverCompletionFunc *cb, void *opaque);
+ BlockDriverAIOCB *(*bdrv_aio_writev)(BlockDriverState *bs,
+ int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
+ BlockDriverCompletionFunc *cb, void *opaque);
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,
+ int (*bdrv_write_compressed)(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors);
- int (*bdrv_snapshot_create)(BlockDriverState *bs,
+ int (*bdrv_snapshot_create)(BlockDriverState *bs,
QEMUSnapshotInfo *sn_info);
- int (*bdrv_snapshot_goto)(BlockDriverState *bs,
+ 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,
+ int (*bdrv_snapshot_list)(BlockDriverState *bs,
QEMUSnapshotInfo **psn_info);
int (*bdrv_get_info)(BlockDriverState *bs, BlockDriverInfo *bdi);
+ int (*bdrv_put_buffer)(BlockDriverState *bs, const uint8_t *buf,
+ int64_t pos, int size);
+ int (*bdrv_get_buffer)(BlockDriverState *bs, uint8_t *buf,
+ int64_t pos, int size);
+
+ /* 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 *(*bdrv_aio_ioctl)(BlockDriverState *bs,
+ unsigned long int req, void *buf,
+ BlockDriverCompletionFunc *cb, void *opaque);
+
+ /* List of options for creating images, terminated by name == NULL */
+ QEMUOptionParameter *create_options;
+
+
+ /* Returns number of errors in image, -errno for internal errors */
+ int (*bdrv_check)(BlockDriverState* bs);
+
struct BlockDriver *next;
};
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 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 */
+ int valid_key; /* if true, a valid encryption key has been set */
+ 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;
+ 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 */
+ char backing_format[16]; /* if non-zero and backing_file exists */
int is_temporary;
-
+ int media_changed;
+
BlockDriverState *backing_hd;
- /* sync read/write emulation */
+ /* 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;
+
+ /* Whether the disk can expand beyond total_sectors */
+ int growable;
+
+ /* the memory alignment required for the buffers handled by this driver */
+ int buffer_alignment;
- 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;
+ void *private;
};
struct BlockDriverAIOCB {
+ AIOPool *pool;
BlockDriverState *bs;
BlockDriverCompletionFunc *cb;
- void *cb_opaque;
-
- void *opaque; /* driver opaque */
+ void *opaque;
+ BlockDriverAIOCB *next;
};
void get_tmp_filename(char *filename, int size);
+void *qemu_aio_get(AIOPool *pool, BlockDriverState *bs,
+ BlockDriverCompletionFunc *cb, void *opaque);
+void qemu_aio_release(void *p);
+
+void *qemu_blockalign(BlockDriverState *bs, size_t size);
+
+extern BlockDriverState *bdrv_first;
+
#endif /* BLOCK_INT_H */
projects / qemu / blobdiff