X-Git-Url: http://git.maemo.org/git/?a=blobdiff_plain;f=block_int.h;h=8d0da7cfd7a6f90fe6399cd5c1be6ed1c56728b4;hb=f452095e3f8d03b87d8df939a370ab767f221c36;hp=e3038160e6fe82228516ce3cdf48448898259759;hpb=95389c8681d4e52f9192fb15e12dba29c6807545;p=qemu diff --git a/block_int.h b/block_int.h index e303816..8d0da7c 100644 --- a/block_int.h +++ b/block_int.h @@ -1,8 +1,8 @@ /* * 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 @@ -24,57 +24,157 @@ #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 (*bdrv_read)(BlockDriverState *bs, int64_t sector_num, + 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, + 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 */ + 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_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); + + 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; }; struct BlockDriverState { - int64_t total_sectors; + 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; - + /* 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; + /* 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 *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 */