6db956039d
BDRV_O_FILE is only used to communicate between bdrv_file_open and bdrv_open. It affects two things: first bdrv_open only searches for protocols using find_protocol instead of all image formats and host drivers. We can easily move that to the caller and pass the found driver to bdrv_open. Second it is used to not force a read-write open of a snapshot file. But we never use bdrv_file_open to open snapshots and this behaviour doesn't make sense to start with. qemu-io abused the BDRV_O_FILE for it's growable option, switch it to using bdrv_file_open to make sure we only open files as growable were we can actually support that. This patch requires Kevin's "[PATCH] Replace calls of old bdrv_open" to be applied first. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
259 lines
9.5 KiB
C
259 lines
9.5 KiB
C
#ifndef BLOCK_H
|
|
#define BLOCK_H
|
|
|
|
#include "qemu-aio.h"
|
|
#include "qemu-common.h"
|
|
#include "qemu-option.h"
|
|
#include "qobject.h"
|
|
|
|
/* block.c */
|
|
typedef struct BlockDriver BlockDriver;
|
|
|
|
typedef struct BlockDriverInfo {
|
|
/* in bytes, 0 if irrelevant */
|
|
int cluster_size;
|
|
/* offset at which the VM state can be saved (0 if not possible) */
|
|
int64_t vm_state_offset;
|
|
} BlockDriverInfo;
|
|
|
|
typedef struct QEMUSnapshotInfo {
|
|
char id_str[128]; /* unique snapshot id */
|
|
/* the following fields are informative. They are not needed for
|
|
the consistency of the snapshot */
|
|
char name[256]; /* user choosen name */
|
|
uint32_t vm_state_size; /* VM state info size */
|
|
uint32_t date_sec; /* UTC date of the snapshot */
|
|
uint32_t date_nsec;
|
|
uint64_t vm_clock_nsec; /* VM clock relative to boot */
|
|
} QEMUSnapshotInfo;
|
|
|
|
#define BDRV_O_RDWR 0x0002
|
|
#define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */
|
|
#define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */
|
|
#define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */
|
|
#define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */
|
|
#define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */
|
|
|
|
#define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB)
|
|
|
|
#define BDRV_SECTOR_BITS 9
|
|
#define BDRV_SECTOR_SIZE (1 << BDRV_SECTOR_BITS)
|
|
#define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1);
|
|
|
|
typedef enum {
|
|
BDRV_ACTION_REPORT, BDRV_ACTION_IGNORE, BDRV_ACTION_STOP
|
|
} BlockMonEventAction;
|
|
|
|
void bdrv_mon_event(const BlockDriverState *bdrv,
|
|
BlockMonEventAction action, int is_read);
|
|
void bdrv_info_print(Monitor *mon, const QObject *data);
|
|
void bdrv_info(Monitor *mon, QObject **ret_data);
|
|
void bdrv_stats_print(Monitor *mon, const QObject *data);
|
|
void bdrv_info_stats(Monitor *mon, QObject **ret_data);
|
|
|
|
void bdrv_init(void);
|
|
void bdrv_init_with_whitelist(void);
|
|
BlockDriver *bdrv_find_format(const char *format_name);
|
|
BlockDriver *bdrv_find_whitelisted_format(const char *format_name);
|
|
int bdrv_create(BlockDriver *drv, const char* filename,
|
|
QEMUOptionParameter *options);
|
|
int bdrv_create2(BlockDriver *drv,
|
|
const char *filename, int64_t size_in_sectors,
|
|
const char *backing_file, const char *backing_format,
|
|
int flags);
|
|
BlockDriverState *bdrv_new(const char *device_name);
|
|
void bdrv_delete(BlockDriverState *bs);
|
|
int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags);
|
|
int bdrv_open(BlockDriverState *bs, const char *filename, int flags,
|
|
BlockDriver *drv);
|
|
void bdrv_close(BlockDriverState *bs);
|
|
int bdrv_check(BlockDriverState *bs);
|
|
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);
|
|
int bdrv_pread(BlockDriverState *bs, int64_t offset,
|
|
void *buf, int count);
|
|
int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
|
|
const void *buf, int count);
|
|
int bdrv_truncate(BlockDriverState *bs, int64_t offset);
|
|
int64_t bdrv_getlength(BlockDriverState *bs);
|
|
void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr);
|
|
void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs);
|
|
int bdrv_commit(BlockDriverState *bs);
|
|
int bdrv_change_backing_file(BlockDriverState *bs,
|
|
const char *backing_file, const char *backing_fmt);
|
|
void bdrv_register(BlockDriver *bdrv);
|
|
|
|
/* async block I/O */
|
|
typedef struct BlockDriverAIOCB BlockDriverAIOCB;
|
|
typedef void BlockDriverCompletionFunc(void *opaque, int ret);
|
|
typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector,
|
|
int sector_num);
|
|
BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num,
|
|
QEMUIOVector *iov, int nb_sectors,
|
|
BlockDriverCompletionFunc *cb, void *opaque);
|
|
BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num,
|
|
QEMUIOVector *iov, int nb_sectors,
|
|
BlockDriverCompletionFunc *cb, void *opaque);
|
|
BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs,
|
|
BlockDriverCompletionFunc *cb, void *opaque);
|
|
void bdrv_aio_cancel(BlockDriverAIOCB *acb);
|
|
|
|
typedef struct BlockRequest {
|
|
/* Fields to be filled by multiwrite caller */
|
|
int64_t sector;
|
|
int nb_sectors;
|
|
QEMUIOVector *qiov;
|
|
BlockDriverCompletionFunc *cb;
|
|
void *opaque;
|
|
|
|
/* Filled by multiwrite implementation */
|
|
int error;
|
|
} BlockRequest;
|
|
|
|
int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs,
|
|
int num_reqs);
|
|
|
|
/* sg packet commands */
|
|
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);
|
|
|
|
/* Ensure contents are flushed to disk. */
|
|
void bdrv_flush(BlockDriverState *bs);
|
|
void bdrv_flush_all(void);
|
|
|
|
int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
|
|
int *pnum);
|
|
|
|
#define BDRV_TYPE_HD 0
|
|
#define BDRV_TYPE_CDROM 1
|
|
#define BDRV_TYPE_FLOPPY 2
|
|
#define BIOS_ATA_TRANSLATION_AUTO 0
|
|
#define BIOS_ATA_TRANSLATION_NONE 1
|
|
#define BIOS_ATA_TRANSLATION_LBA 2
|
|
#define BIOS_ATA_TRANSLATION_LARGE 3
|
|
#define BIOS_ATA_TRANSLATION_RECHS 4
|
|
|
|
void bdrv_set_geometry_hint(BlockDriverState *bs,
|
|
int cyls, int heads, int secs);
|
|
void bdrv_set_type_hint(BlockDriverState *bs, int type);
|
|
void bdrv_set_translation_hint(BlockDriverState *bs, int translation);
|
|
void bdrv_get_geometry_hint(BlockDriverState *bs,
|
|
int *pcyls, int *pheads, int *psecs);
|
|
int bdrv_get_type_hint(BlockDriverState *bs);
|
|
int bdrv_get_translation_hint(BlockDriverState *bs);
|
|
int bdrv_is_removable(BlockDriverState *bs);
|
|
int bdrv_is_read_only(BlockDriverState *bs);
|
|
int bdrv_is_sg(BlockDriverState *bs);
|
|
int bdrv_enable_write_cache(BlockDriverState *bs);
|
|
int bdrv_is_inserted(BlockDriverState *bs);
|
|
int bdrv_media_changed(BlockDriverState *bs);
|
|
int bdrv_is_locked(BlockDriverState *bs);
|
|
void bdrv_set_locked(BlockDriverState *bs, int locked);
|
|
int bdrv_eject(BlockDriverState *bs, int eject_flag);
|
|
void bdrv_set_change_cb(BlockDriverState *bs,
|
|
void (*change_cb)(void *opaque), void *opaque);
|
|
void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size);
|
|
BlockDriverState *bdrv_find(const char *name);
|
|
void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs),
|
|
void *opaque);
|
|
int bdrv_is_encrypted(BlockDriverState *bs);
|
|
int bdrv_key_required(BlockDriverState *bs);
|
|
int bdrv_set_key(BlockDriverState *bs, const char *key);
|
|
int bdrv_query_missing_keys(void);
|
|
void bdrv_iterate_format(void (*it)(void *opaque, const char *name),
|
|
void *opaque);
|
|
const char *bdrv_get_device_name(BlockDriverState *bs);
|
|
int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
|
|
const uint8_t *buf, int nb_sectors);
|
|
int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi);
|
|
|
|
const char *bdrv_get_encrypted_filename(BlockDriverState *bs);
|
|
void bdrv_get_backing_filename(BlockDriverState *bs,
|
|
char *filename, int filename_size);
|
|
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);
|
|
char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn);
|
|
|
|
char *get_human_readable_size(char *buf, int buf_size, int64_t size);
|
|
int path_is_absolute(const char *path);
|
|
void path_combine(char *dest, int dest_size,
|
|
const char *base_path,
|
|
const char *filename);
|
|
|
|
int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf,
|
|
int64_t pos, int size);
|
|
|
|
int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf,
|
|
int64_t pos, int size);
|
|
|
|
#define BDRV_SECTORS_PER_DIRTY_CHUNK 2048
|
|
|
|
void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable);
|
|
int bdrv_get_dirty(BlockDriverState *bs, int64_t sector);
|
|
void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector,
|
|
int nr_sectors);
|
|
int64_t bdrv_get_dirty_count(BlockDriverState *bs);
|
|
|
|
|
|
typedef enum {
|
|
BLKDBG_L1_UPDATE,
|
|
|
|
BLKDBG_L1_GROW_ALLOC_TABLE,
|
|
BLKDBG_L1_GROW_WRITE_TABLE,
|
|
BLKDBG_L1_GROW_ACTIVATE_TABLE,
|
|
|
|
BLKDBG_L2_LOAD,
|
|
BLKDBG_L2_UPDATE,
|
|
BLKDBG_L2_UPDATE_COMPRESSED,
|
|
BLKDBG_L2_ALLOC_COW_READ,
|
|
BLKDBG_L2_ALLOC_WRITE,
|
|
|
|
BLKDBG_READ,
|
|
BLKDBG_READ_AIO,
|
|
BLKDBG_READ_BACKING,
|
|
BLKDBG_READ_BACKING_AIO,
|
|
BLKDBG_READ_COMPRESSED,
|
|
|
|
BLKDBG_WRITE_AIO,
|
|
BLKDBG_WRITE_COMPRESSED,
|
|
|
|
BLKDBG_VMSTATE_LOAD,
|
|
BLKDBG_VMSTATE_SAVE,
|
|
|
|
BLKDBG_COW_READ,
|
|
BLKDBG_COW_WRITE,
|
|
|
|
BLKDBG_REFTABLE_LOAD,
|
|
BLKDBG_REFTABLE_GROW,
|
|
|
|
BLKDBG_REFBLOCK_LOAD,
|
|
BLKDBG_REFBLOCK_UPDATE,
|
|
BLKDBG_REFBLOCK_UPDATE_PART,
|
|
BLKDBG_REFBLOCK_ALLOC,
|
|
BLKDBG_REFBLOCK_ALLOC_HOOKUP,
|
|
BLKDBG_REFBLOCK_ALLOC_WRITE,
|
|
BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS,
|
|
BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE,
|
|
BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE,
|
|
|
|
BLKDBG_CLUSTER_ALLOC,
|
|
BLKDBG_CLUSTER_ALLOC_BYTES,
|
|
BLKDBG_CLUSTER_FREE,
|
|
|
|
BLKDBG_EVENT_MAX,
|
|
} BlkDebugEvent;
|
|
|
|
#define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt)
|
|
void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event);
|
|
|
|
#endif
|