mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-11-05 20:35:44 +00:00
c2c9a46609
This is a compatible extension to the snapshot header format that allows saving a 64 bit VM state size. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
430 lines
16 KiB
C
430 lines
16 KiB
C
#ifndef BLOCK_H
|
|
#define BLOCK_H
|
|
|
|
#include "qemu-aio.h"
|
|
#include "qemu-common.h"
|
|
#include "qemu-option.h"
|
|
#include "qemu-coroutine.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 chosen name */
|
|
uint64_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;
|
|
|
|
/* Callbacks for block device models */
|
|
typedef struct BlockDevOps {
|
|
/*
|
|
* Runs when virtual media changed (monitor commands eject, change)
|
|
* Argument load is true on load and false on eject.
|
|
* Beware: doesn't run when a host device's physical media
|
|
* changes. Sure would be useful if it did.
|
|
* Device models with removable media must implement this callback.
|
|
*/
|
|
void (*change_media_cb)(void *opaque, bool load);
|
|
/*
|
|
* Runs when an eject request is issued from the monitor, the tray
|
|
* is closed, and the medium is locked.
|
|
* Device models that do not implement is_medium_locked will not need
|
|
* this callback. Device models that can lock the medium or tray might
|
|
* want to implement the callback and unlock the tray when "force" is
|
|
* true, even if they do not support eject requests.
|
|
*/
|
|
void (*eject_request_cb)(void *opaque, bool force);
|
|
/*
|
|
* Is the virtual tray open?
|
|
* Device models implement this only when the device has a tray.
|
|
*/
|
|
bool (*is_tray_open)(void *opaque);
|
|
/*
|
|
* Is the virtual medium locked into the device?
|
|
* Device models implement this only when device has such a lock.
|
|
*/
|
|
bool (*is_medium_locked)(void *opaque);
|
|
/*
|
|
* Runs when the size changed (e.g. monitor command block_resize)
|
|
*/
|
|
void (*resize_cb)(void *opaque);
|
|
} BlockDevOps;
|
|
|
|
#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_NO_FLUSH 0x0200 /* disable flushing on this disk */
|
|
#define BDRV_O_COPY_ON_READ 0x0400 /* copy read backing sectors into image */
|
|
|
|
#define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH)
|
|
|
|
#define BDRV_SECTOR_BITS 9
|
|
#define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS)
|
|
#define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1)
|
|
|
|
typedef enum {
|
|
BLOCK_ERR_REPORT, BLOCK_ERR_IGNORE, BLOCK_ERR_STOP_ENOSPC,
|
|
BLOCK_ERR_STOP_ANY
|
|
} BlockErrorAction;
|
|
|
|
typedef enum {
|
|
BDRV_ACTION_REPORT, BDRV_ACTION_IGNORE, BDRV_ACTION_STOP
|
|
} BlockMonEventAction;
|
|
|
|
void bdrv_iostatus_enable(BlockDriverState *bs);
|
|
void bdrv_iostatus_reset(BlockDriverState *bs);
|
|
void bdrv_iostatus_disable(BlockDriverState *bs);
|
|
bool bdrv_iostatus_is_enabled(const BlockDriverState *bs);
|
|
void bdrv_iostatus_set_err(BlockDriverState *bs, int error);
|
|
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);
|
|
|
|
/* disk I/O throttling */
|
|
void bdrv_io_limits_enable(BlockDriverState *bs);
|
|
void bdrv_io_limits_disable(BlockDriverState *bs);
|
|
bool bdrv_io_limits_enabled(BlockDriverState *bs);
|
|
|
|
void bdrv_init(void);
|
|
void bdrv_init_with_whitelist(void);
|
|
BlockDriver *bdrv_find_protocol(const char *filename);
|
|
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_create_file(const char* filename, QEMUOptionParameter *options);
|
|
BlockDriverState *bdrv_new(const char *device_name);
|
|
void bdrv_make_anon(BlockDriverState *bs);
|
|
void bdrv_delete(BlockDriverState *bs);
|
|
int bdrv_parse_cache_flags(const char *mode, int *flags);
|
|
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_attach_dev(BlockDriverState *bs, void *dev);
|
|
void bdrv_attach_dev_nofail(BlockDriverState *bs, void *dev);
|
|
void bdrv_detach_dev(BlockDriverState *bs, void *dev);
|
|
void *bdrv_get_attached_dev(BlockDriverState *bs);
|
|
void bdrv_set_dev_ops(BlockDriverState *bs, const BlockDevOps *ops,
|
|
void *opaque);
|
|
void bdrv_dev_eject_request(BlockDriverState *bs, bool force);
|
|
bool bdrv_dev_has_removable_media(BlockDriverState *bs);
|
|
bool bdrv_dev_is_tray_open(BlockDriverState *bs);
|
|
bool bdrv_dev_is_medium_locked(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_pwrite_sync(BlockDriverState *bs, int64_t offset,
|
|
const void *buf, int count);
|
|
int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num,
|
|
int nb_sectors, QEMUIOVector *qiov);
|
|
int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num,
|
|
int nb_sectors, QEMUIOVector *qiov);
|
|
int coroutine_fn bdrv_co_is_allocated(BlockDriverState *bs, int64_t sector_num,
|
|
int nb_sectors, int *pnum);
|
|
int bdrv_truncate(BlockDriverState *bs, int64_t offset);
|
|
int64_t bdrv_getlength(BlockDriverState *bs);
|
|
int64_t bdrv_get_allocated_file_size(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);
|
|
void bdrv_commit_all(void);
|
|
int bdrv_change_backing_file(BlockDriverState *bs,
|
|
const char *backing_file, const char *backing_fmt);
|
|
void bdrv_register(BlockDriver *bdrv);
|
|
|
|
|
|
typedef struct BdrvCheckResult {
|
|
int corruptions;
|
|
int leaks;
|
|
int check_errors;
|
|
} BdrvCheckResult;
|
|
|
|
int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res);
|
|
|
|
/* 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);
|
|
BlockDriverAIOCB *bdrv_aio_discard(BlockDriverState *bs,
|
|
int64_t sector_num, int nb_sectors,
|
|
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);
|
|
|
|
/* Invalidate any cached metadata used by image formats */
|
|
void bdrv_invalidate_cache(BlockDriverState *bs);
|
|
void bdrv_invalidate_cache_all(void);
|
|
|
|
/* Ensure contents are flushed to disk. */
|
|
int bdrv_flush(BlockDriverState *bs);
|
|
int coroutine_fn bdrv_co_flush(BlockDriverState *bs);
|
|
void bdrv_flush_all(void);
|
|
void bdrv_close_all(void);
|
|
void bdrv_drain_all(void);
|
|
|
|
int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);
|
|
int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);
|
|
int bdrv_has_zero_init(BlockDriverState *bs);
|
|
int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
|
|
int *pnum);
|
|
|
|
#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_translation_hint(BlockDriverState *bs, int translation);
|
|
void bdrv_get_geometry_hint(BlockDriverState *bs,
|
|
int *pcyls, int *pheads, int *psecs);
|
|
typedef enum FDriveType {
|
|
FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
|
|
FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
|
|
FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
|
|
FDRIVE_DRV_NONE = 0x03, /* No drive connected */
|
|
} FDriveType;
|
|
|
|
void bdrv_get_floppy_geometry_hint(BlockDriverState *bs, int *nb_heads,
|
|
int *max_track, int *last_sect,
|
|
FDriveType drive_in, FDriveType *drive);
|
|
int bdrv_get_translation_hint(BlockDriverState *bs);
|
|
void bdrv_set_on_error(BlockDriverState *bs, BlockErrorAction on_read_error,
|
|
BlockErrorAction on_write_error);
|
|
BlockErrorAction bdrv_get_on_error(BlockDriverState *bs, int is_read);
|
|
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);
|
|
void bdrv_lock_medium(BlockDriverState *bs, bool locked);
|
|
void bdrv_eject(BlockDriverState *bs, int eject_flag);
|
|
void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size);
|
|
BlockDriverState *bdrv_find(const char *name);
|
|
BlockDriverState *bdrv_next(BlockDriverState *bs);
|
|
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_can_snapshot(BlockDriverState *bs);
|
|
int bdrv_is_snapshot(BlockDriverState *bs);
|
|
BlockDriverState *bdrv_snapshots(void);
|
|
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_snapshot_load_tmp(BlockDriverState *bs,
|
|
const char *snapshot_name);
|
|
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);
|
|
|
|
int bdrv_img_create(const char *filename, const char *fmt,
|
|
const char *base_filename, const char *base_fmt,
|
|
char *options, uint64_t img_size, int flags);
|
|
|
|
void bdrv_set_buffer_alignment(BlockDriverState *bs, int align);
|
|
void *qemu_blockalign(BlockDriverState *bs, size_t 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);
|
|
|
|
void bdrv_enable_copy_on_read(BlockDriverState *bs);
|
|
void bdrv_disable_copy_on_read(BlockDriverState *bs);
|
|
|
|
void bdrv_set_in_use(BlockDriverState *bs, int in_use);
|
|
int bdrv_in_use(BlockDriverState *bs);
|
|
|
|
enum BlockAcctType {
|
|
BDRV_ACCT_READ,
|
|
BDRV_ACCT_WRITE,
|
|
BDRV_ACCT_FLUSH,
|
|
BDRV_MAX_IOTYPE,
|
|
};
|
|
|
|
typedef struct BlockAcctCookie {
|
|
int64_t bytes;
|
|
int64_t start_time_ns;
|
|
enum BlockAcctType type;
|
|
} BlockAcctCookie;
|
|
|
|
void bdrv_acct_start(BlockDriverState *bs, BlockAcctCookie *cookie,
|
|
int64_t bytes, enum BlockAcctType type);
|
|
void bdrv_acct_done(BlockDriverState *bs, BlockAcctCookie *cookie);
|
|
|
|
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);
|
|
|
|
|
|
/* Convenience for block device models */
|
|
|
|
typedef struct BlockConf {
|
|
BlockDriverState *bs;
|
|
uint16_t physical_block_size;
|
|
uint16_t logical_block_size;
|
|
uint16_t min_io_size;
|
|
uint32_t opt_io_size;
|
|
int32_t bootindex;
|
|
uint32_t discard_granularity;
|
|
} BlockConf;
|
|
|
|
static inline unsigned int get_physical_block_exp(BlockConf *conf)
|
|
{
|
|
unsigned int exp = 0, size;
|
|
|
|
for (size = conf->physical_block_size;
|
|
size > conf->logical_block_size;
|
|
size >>= 1) {
|
|
exp++;
|
|
}
|
|
|
|
return exp;
|
|
}
|
|
|
|
#define DEFINE_BLOCK_PROPERTIES(_state, _conf) \
|
|
DEFINE_PROP_DRIVE("drive", _state, _conf.bs), \
|
|
DEFINE_PROP_UINT16("logical_block_size", _state, \
|
|
_conf.logical_block_size, 512), \
|
|
DEFINE_PROP_UINT16("physical_block_size", _state, \
|
|
_conf.physical_block_size, 512), \
|
|
DEFINE_PROP_UINT16("min_io_size", _state, _conf.min_io_size, 0), \
|
|
DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 0), \
|
|
DEFINE_PROP_INT32("bootindex", _state, _conf.bootindex, -1), \
|
|
DEFINE_PROP_UINT32("discard_granularity", _state, \
|
|
_conf.discard_granularity, 0)
|
|
|
|
#endif
|
|
|