[qemu.git] / block.h

#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;
    bool is_dirty;
} BlockDriverInfo;

typedef struct BlockFragInfo {
    uint64_t allocated_clusters;
    uint64_t total_clusters;
    uint64_t fragmented_clusters;
} BlockFragInfo;

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_INCOMING    0x0800  /* consistency hint for incoming migration */
#define BDRV_O_CHECK       0x1000  /* open solely for consistency check */
#define BDRV_O_ALLOW_RDWR  0x2000  /* allow reopen to change from r/o to r/w */

#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
} BlockQMPEventAction;

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_emit_qmp_error_event(const BlockDriverState *bdrv,
                               BlockQMPEventAction 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_swap(BlockDriverState *bs_new, BlockDriverState *bs_old);
void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top);
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_read_unthrottled(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_copy_on_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);
/*
 * Efficiently zero a region of the disk image.  Note that this is a regular
 * I/O request like read or write and should have a reasonable size.  This
 * function is not suitable for zeroing the entire image in a single request
 * because it may allocate memory for the entire region.
 */
int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs, int64_t sector_num,
    int nb_sectors);
int coroutine_fn bdrv_co_is_allocated(BlockDriverState *bs, int64_t sector_num,
    int nb_sectors, int *pnum);
int coroutine_fn bdrv_co_is_allocated_above(BlockDriverState *top,
                                            BlockDriverState *base,
                                            int64_t sector_num,
                                            int nb_sectors, int *pnum);
BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs,
    const char *backing_file);
int bdrv_get_backing_file_depth(BlockDriverState *bs);
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);
int bdrv_commit(BlockDriverState *bs);
int 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;
    int corruptions_fixed;
    int leaks_fixed;
    BlockFragInfo bfi;
} BdrvCheckResult;

typedef enum {
    BDRV_FIX_LEAKS    = 1,
    BDRV_FIX_ERRORS   = 2,
} BdrvCheckMode;

int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix);

/* async block I/O */
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);

void bdrv_clear_incoming_migration_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);

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);
void bdrv_set_enable_write_cache(BlockDriverState *bs, bool wce);
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, bool eject_flag);
const char *bdrv_get_format_name(BlockDriverState *bs);
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_get_flags(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);
void bdrv_get_full_backing_filename(BlockDriverState *bs,
                                    char *dest, size_t sz);
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_AIO,
    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
Commit	Line	Data
faf07963 PB	1	#ifndef BLOCK_H
	2	#define BLOCK_H
	3
a76bab49	4	#include "qemu-aio.h"
3b69e4b9	5	#include "qemu-common.h"
0e7e1989	6	#include "qemu-option.h"
da1fa91d	7	#include "qemu-coroutine.h"
d15e5465	8	#include "qobject.h"
a76bab49	9
faf07963	10	/* block.c */
faf07963 PB	11	typedef struct BlockDriver BlockDriver;
faf07963 PB	12
faf07963 PB	13	typedef struct BlockDriverInfo {
	14	/* in bytes, 0 if irrelevant */
	15	int cluster_size;
	16	/* offset at which the VM state can be saved (0 if not possible) */
	17	int64_t vm_state_offset;
64c79160	18	bool is_dirty;
faf07963 PB	19	} BlockDriverInfo;
faf07963 PB	20
f8111c24 DXW	21	typedef struct BlockFragInfo {
	22	uint64_t allocated_clusters;
	23	uint64_t total_clusters;
	24	uint64_t fragmented_clusters;
	25	} BlockFragInfo;
	26
faf07963 PB	27	typedef struct QEMUSnapshotInfo {
	28	char id_str[128]; /* unique snapshot id */
	29	/* the following fields are informative. They are not needed for
	30	the consistency of the snapshot */
e7d81004	31	char name[256]; /* user chosen name */
c2c9a466	32	uint64_t vm_state_size; /* VM state info size */
faf07963 PB	33	uint32_t date_sec; /* UTC date of the snapshot */
	34	uint32_t date_nsec;
	35	uint64_t vm_clock_nsec; /* VM clock relative to boot */
	36	} QEMUSnapshotInfo;
	37
145feb17	38	/* Callbacks for block device models */
0e49de52	39	typedef struct BlockDevOps {
145feb17 MA	40	/*
145feb17 MA	41	* Runs when virtual media changed (monitor commands eject, change)
7d4b4ba5	42	* Argument load is true on load and false on eject.
145feb17 MA	43	* Beware: doesn't run when a host device's physical media
145feb17 MA	44	* changes. Sure would be useful if it did.
2c6942fa	45	* Device models with removable media must implement this callback.
145feb17	46	*/
7d4b4ba5	47	void (change_media_cb)(void opaque, bool load);
025ccaa7 PB	48	/*
	49	* Runs when an eject request is issued from the monitor, the tray
	50	* is closed, and the medium is locked.
	51	* Device models that do not implement is_medium_locked will not need
	52	* this callback. Device models that can lock the medium or tray might
	53	* want to implement the callback and unlock the tray when "force" is
	54	* true, even if they do not support eject requests.
	55	*/
	56	void (eject_request_cb)(void opaque, bool force);
e4def80b MA	57	/*
	58	* Is the virtual tray open?
	59	* Device models implement this only when the device has a tray.
	60	*/
	61	bool (is_tray_open)(void opaque);
f107639a MA	62	/*
	63	* Is the virtual medium locked into the device?
	64	* Device models implement this only when device has such a lock.
	65	*/
	66	bool (is_medium_locked)(void opaque);
145feb17 MA	67	/*
	68	* Runs when the size changed (e.g. monitor command block_resize)
	69	*/
	70	void (resize_cb)(void opaque);
0e49de52 MA	71	} BlockDevOps;
0e49de52 MA	72
faf07963	73	#define BDRV_O_RDWR 0x0002
faf07963	74	#define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */
9f7965c7 AL	75	#define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */
9f7965c7 AL	76	#define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */
5c6c3a6c	77	#define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */
b783e409	78	#define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */
016f5cf6	79	#define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */
53fec9d3	80	#define BDRV_O_COPY_ON_READ 0x0400 /* copy read backing sectors into image */
ccb1f4a7	81	#define BDRV_O_INCOMING 0x0800 /* consistency hint for incoming migration */
058f8f16	82	#define BDRV_O_CHECK 0x1000 /* open solely for consistency check */
be028adc	83	#define BDRV_O_ALLOW_RDWR 0x2000 /* allow reopen to change from r/o to r/w */
9f7965c7	84
ceb25e5c	85	#define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE \| BDRV_O_CACHE_WB \| BDRV_O_NO_FLUSH)
faf07963	86
6ea44308	87	#define BDRV_SECTOR_BITS 9
c63782cb	88	#define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS)
3abbc4d9	89	#define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1)
6ea44308	90
abd7f68d MA	91	typedef enum {
	92	BLOCK_ERR_REPORT, BLOCK_ERR_IGNORE, BLOCK_ERR_STOP_ENOSPC,
	93	BLOCK_ERR_STOP_ANY
	94	} BlockErrorAction;
	95
2582bfed LC	96	typedef enum {
2582bfed LC	97	BDRV_ACTION_REPORT, BDRV_ACTION_IGNORE, BDRV_ACTION_STOP
329c0a48	98	} BlockQMPEventAction;
2582bfed	99
28a7282a LC	100	void bdrv_iostatus_enable(BlockDriverState *bs);
	101	void bdrv_iostatus_reset(BlockDriverState *bs);
	102	void bdrv_iostatus_disable(BlockDriverState *bs);
	103	bool bdrv_iostatus_is_enabled(const BlockDriverState *bs);
	104	void bdrv_iostatus_set_err(BlockDriverState *bs, int error);
329c0a48 LC	105	void bdrv_emit_qmp_error_event(const BlockDriverState *bdrv,
329c0a48 LC	106	BlockQMPEventAction action, int is_read);
d15e5465 LC	107	void bdrv_info_print(Monitor mon, const QObject data);
d15e5465 LC	108	void bdrv_info(Monitor mon, QObject *ret_data);
218a536a LC	109	void bdrv_stats_print(Monitor mon, const QObject data);
218a536a LC	110	void bdrv_info_stats(Monitor mon, QObject *ret_data);
faf07963	111
0563e191 ZYW	112	/* disk I/O throttling */
0563e191 ZYW	113	void bdrv_io_limits_enable(BlockDriverState *bs);
98f90dba	114	void bdrv_io_limits_disable(BlockDriverState *bs);
0563e191 ZYW	115	bool bdrv_io_limits_enabled(BlockDriverState *bs);
0563e191 ZYW	116
faf07963	117	void bdrv_init(void);
eb852011	118	void bdrv_init_with_whitelist(void);
b50cbabc	119	BlockDriver bdrv_find_protocol(const char filename);
faf07963	120	BlockDriver bdrv_find_format(const char format_name);
eb852011	121	BlockDriver bdrv_find_whitelisted_format(const char format_name);
0e7e1989 KW	122	int bdrv_create(BlockDriver drv, const char filename,
0e7e1989 KW	123	QEMUOptionParameter *options);
84a12e66	124	int bdrv_create_file(const char* filename, QEMUOptionParameter *options);
faf07963	125	BlockDriverState bdrv_new(const char device_name);
d22b2f41	126	void bdrv_make_anon(BlockDriverState *bs);
4ddc07ca	127	void bdrv_swap(BlockDriverState bs_new, BlockDriverState bs_old);
8802d1fd	128	void bdrv_append(BlockDriverState bs_new, BlockDriverState bs_top);
faf07963	129	void bdrv_delete(BlockDriverState *bs);
c3993cdc	130	int bdrv_parse_cache_flags(const char mode, int flags);
faf07963	131	int bdrv_file_open(BlockDriverState *pbs, const char filename, int flags);
d6e9098e KW	132	int bdrv_open(BlockDriverState bs, const char filename, int flags,
d6e9098e KW	133	BlockDriver *drv);
faf07963	134	void bdrv_close(BlockDriverState *bs);
fa879d62 MA	135	int bdrv_attach_dev(BlockDriverState bs, void dev);
	136	void bdrv_attach_dev_nofail(BlockDriverState bs, void dev);
	137	void bdrv_detach_dev(BlockDriverState bs, void dev);
	138	void bdrv_get_attached_dev(BlockDriverState bs);
0e49de52 MA	139	void bdrv_set_dev_ops(BlockDriverState bs, const BlockDevOps ops,
0e49de52 MA	140	void *opaque);
025ccaa7	141	void bdrv_dev_eject_request(BlockDriverState *bs, bool force);
2c6942fa	142	bool bdrv_dev_has_removable_media(BlockDriverState *bs);
e4def80b	143	bool bdrv_dev_is_tray_open(BlockDriverState *bs);
f107639a	144	bool bdrv_dev_is_medium_locked(BlockDriverState *bs);
faf07963 PB	145	int bdrv_read(BlockDriverState *bs, int64_t sector_num,
faf07963 PB	146	uint8_t *buf, int nb_sectors);
07d27a44 MA	147	int bdrv_read_unthrottled(BlockDriverState *bs, int64_t sector_num,
07d27a44 MA	148	uint8_t *buf, int nb_sectors);
faf07963 PB	149	int bdrv_write(BlockDriverState *bs, int64_t sector_num,
	150	const uint8_t *buf, int nb_sectors);
	151	int bdrv_pread(BlockDriverState *bs, int64_t offset,
	152	void *buf, int count);
	153	int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
	154	const void *buf, int count);
f08145fe KW	155	int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset,
f08145fe KW	156	const void *buf, int count);
da1fa91d KW	157	int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num,
da1fa91d KW	158	int nb_sectors, QEMUIOVector *qiov);
470c0504 SH	159	int coroutine_fn bdrv_co_copy_on_readv(BlockDriverState *bs,
470c0504 SH	160	int64_t sector_num, int nb_sectors, QEMUIOVector *qiov);
da1fa91d KW	161	int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num,
da1fa91d KW	162	int nb_sectors, QEMUIOVector *qiov);
f08f2dda SH	163	/*
	164	* Efficiently zero a region of the disk image. Note that this is a regular
	165	* I/O request like read or write and should have a reasonable size. This
	166	* function is not suitable for zeroing the entire image in a single request
	167	* because it may allocate memory for the entire region.
	168	*/
	169	int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs, int64_t sector_num,
	170	int nb_sectors);
060f51c9 SH	171	int coroutine_fn bdrv_co_is_allocated(BlockDriverState *bs, int64_t sector_num,
060f51c9 SH	172	int nb_sectors, int *pnum);
188a7bbf PB	173	int coroutine_fn bdrv_co_is_allocated_above(BlockDriverState *top,
	174	BlockDriverState *base,
	175	int64_t sector_num,
	176	int nb_sectors, int *pnum);
e8a6bb9c MT	177	BlockDriverState bdrv_find_backing_image(BlockDriverState bs,
e8a6bb9c MT	178	const char *backing_file);
f198fd1c	179	int bdrv_get_backing_file_depth(BlockDriverState *bs);
faf07963 PB	180	int bdrv_truncate(BlockDriverState *bs, int64_t offset);
faf07963 PB	181	int64_t bdrv_getlength(BlockDriverState *bs);
4a1d5e1f	182	int64_t bdrv_get_allocated_file_size(BlockDriverState *bs);
96b8f136	183	void bdrv_get_geometry(BlockDriverState bs, uint64_t nb_sectors_ptr);
faf07963	184	int bdrv_commit(BlockDriverState *bs);
e8877497	185	int bdrv_commit_all(void);
756e6736 KW	186	int bdrv_change_backing_file(BlockDriverState *bs,
756e6736 KW	187	const char backing_file, const char backing_fmt);
5efa9d5a AL	188	void bdrv_register(BlockDriver *bdrv);
5efa9d5a AL	189
e076f338 KW	190
	191	typedef struct BdrvCheckResult {
	192	int corruptions;
	193	int leaks;
	194	int check_errors;
ccf34716 KW	195	int corruptions_fixed;
ccf34716 KW	196	int leaks_fixed;
f8111c24	197	BlockFragInfo bfi;
e076f338 KW	198	} BdrvCheckResult;
e076f338 KW	199
4534ff54 KW	200	typedef enum {
	201	BDRV_FIX_LEAKS = 1,
	202	BDRV_FIX_ERRORS = 2,
	203	} BdrvCheckMode;
	204
	205	int bdrv_check(BlockDriverState bs, BdrvCheckResult res, BdrvCheckMode fix);
e076f338	206
faf07963	207	/* async block I/O */
7cd1e32a	208	typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector,
39aa9a12	209	int sector_num);
3b69e4b9 AL	210	BlockDriverAIOCB bdrv_aio_readv(BlockDriverState bs, int64_t sector_num,
	211	QEMUIOVector *iov, int nb_sectors,
	212	BlockDriverCompletionFunc cb, void opaque);
	213	BlockDriverAIOCB bdrv_aio_writev(BlockDriverState bs, int64_t sector_num,
	214	QEMUIOVector *iov, int nb_sectors,
	215	BlockDriverCompletionFunc cb, void opaque);
b2e12bc6	216	BlockDriverAIOCB bdrv_aio_flush(BlockDriverState bs,
39aa9a12	217	BlockDriverCompletionFunc cb, void opaque);
4265d620 PB	218	BlockDriverAIOCB bdrv_aio_discard(BlockDriverState bs,
	219	int64_t sector_num, int nb_sectors,
	220	BlockDriverCompletionFunc cb, void opaque);
faf07963 PB	221	void bdrv_aio_cancel(BlockDriverAIOCB *acb);
faf07963 PB	222
40b4f539 KW	223	typedef struct BlockRequest {
	224	/* Fields to be filled by multiwrite caller */
	225	int64_t sector;
	226	int nb_sectors;
	227	QEMUIOVector *qiov;
	228	BlockDriverCompletionFunc *cb;
	229	void *opaque;
	230
	231	/* Filled by multiwrite implementation */
	232	int error;
	233	} BlockRequest;
	234
	235	int bdrv_aio_multiwrite(BlockDriverState bs, BlockRequest reqs,
	236	int num_reqs);
	237
7d780669	238	/* sg packet commands */
221f715d AL	239	int bdrv_ioctl(BlockDriverState bs, unsigned long int req, void buf);
	240	BlockDriverAIOCB bdrv_aio_ioctl(BlockDriverState bs,
	241	unsigned long int req, void *buf,
	242	BlockDriverCompletionFunc cb, void opaque);
7d780669	243
0f15423c AL	244	/* Invalidate any cached metadata used by image formats */
	245	void bdrv_invalidate_cache(BlockDriverState *bs);
	246	void bdrv_invalidate_cache_all(void);
	247
07789269 BC	248	void bdrv_clear_incoming_migration_all(void);
07789269 BC	249
faf07963	250	/* Ensure contents are flushed to disk. */
205ef796	251	int bdrv_flush(BlockDriverState *bs);
07f07615	252	int coroutine_fn bdrv_co_flush(BlockDriverState *bs);
c6ca28d6	253	void bdrv_flush_all(void);
2bc93fed	254	void bdrv_close_all(void);
922453bc	255	void bdrv_drain_all(void);
c6ca28d6	256
bb8bf76f	257	int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);
4265d620	258	int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);
f2feebbd	259	int bdrv_has_zero_init(BlockDriverState *bs);
f58c7b35	260	int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
39aa9a12	261	int *pnum);
faf07963	262
abd7f68d MA	263	void bdrv_set_on_error(BlockDriverState *bs, BlockErrorAction on_read_error,
	264	BlockErrorAction on_write_error);
	265	BlockErrorAction bdrv_get_on_error(BlockDriverState *bs, int is_read);
faf07963	266	int bdrv_is_read_only(BlockDriverState *bs);
985a03b0	267	int bdrv_is_sg(BlockDriverState *bs);
e900a7b7	268	int bdrv_enable_write_cache(BlockDriverState *bs);
425b0148	269	void bdrv_set_enable_write_cache(BlockDriverState *bs, bool wce);
faf07963 PB	270	int bdrv_is_inserted(BlockDriverState *bs);
faf07963 PB	271	int bdrv_media_changed(BlockDriverState *bs);
025e849a	272	void bdrv_lock_medium(BlockDriverState *bs, bool locked);
f36f3949	273	void bdrv_eject(BlockDriverState *bs, bool eject_flag);
f8d6bba1	274	const char bdrv_get_format_name(BlockDriverState bs);
faf07963	275	BlockDriverState bdrv_find(const char name);
2f399b0a	276	BlockDriverState bdrv_next(BlockDriverState bs);
51de9760 AL	277	void bdrv_iterate(void (it)(void opaque, BlockDriverState *bs),
51de9760 AL	278	void *opaque);
faf07963	279	int bdrv_is_encrypted(BlockDriverState *bs);
c0f4ce77	280	int bdrv_key_required(BlockDriverState *bs);
faf07963	281	int bdrv_set_key(BlockDriverState bs, const char key);
c0f4ce77	282	int bdrv_query_missing_keys(void);
faf07963 PB	283	void bdrv_iterate_format(void (it)(void opaque, const char *name),
	284	void *opaque);
	285	const char bdrv_get_device_name(BlockDriverState bs);
c8433287	286	int bdrv_get_flags(BlockDriverState *bs);
faf07963 PB	287	int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
	288	const uint8_t *buf, int nb_sectors);
	289	int bdrv_get_info(BlockDriverState bs, BlockDriverInfo bdi);
	290
045df330	291	const char bdrv_get_encrypted_filename(BlockDriverState bs);
faf07963 PB	292	void bdrv_get_backing_filename(BlockDriverState *bs,
faf07963 PB	293	char *filename, int filename_size);
dc5a1371 PB	294	void bdrv_get_full_backing_filename(BlockDriverState *bs,
dc5a1371 PB	295	char *dest, size_t sz);
feeee5ac	296	int bdrv_can_snapshot(BlockDriverState *bs);
199630b6	297	int bdrv_is_snapshot(BlockDriverState *bs);
f9092b10	298	BlockDriverState *bdrv_snapshots(void);
faf07963 PB	299	int bdrv_snapshot_create(BlockDriverState *bs,
	300	QEMUSnapshotInfo *sn_info);
	301	int bdrv_snapshot_goto(BlockDriverState *bs,
	302	const char *snapshot_id);
	303	int bdrv_snapshot_delete(BlockDriverState bs, const char snapshot_id);
	304	int bdrv_snapshot_list(BlockDriverState *bs,
	305	QEMUSnapshotInfo **psn_info);
51ef6727	306	int bdrv_snapshot_load_tmp(BlockDriverState *bs,
51ef6727	307	const char *snapshot_name);
faf07963 PB	308	char bdrv_snapshot_dump(char buf, int buf_size, QEMUSnapshotInfo *sn);
	309
	310	char get_human_readable_size(char buf, int buf_size, int64_t size);
	311	int path_is_absolute(const char *path);
	312	void path_combine(char *dest, int dest_size,
	313	const char *base_path,
	314	const char *filename);
	315
45566e9c CH	316	int bdrv_save_vmstate(BlockDriverState bs, const uint8_t buf,
45566e9c CH	317	int64_t pos, int size);
178e08a5	318
45566e9c CH	319	int bdrv_load_vmstate(BlockDriverState bs, uint8_t buf,
45566e9c CH	320	int64_t pos, int size);
178e08a5	321
f88e1a42 JS	322	int bdrv_img_create(const char filename, const char fmt,
	323	const char base_filename, const char base_fmt,
	324	char *options, uint64_t img_size, int flags);
	325
7b6f9300	326	void bdrv_set_buffer_alignment(BlockDriverState *bs, int align);
ba5b7ad4 MA	327	void qemu_blockalign(BlockDriverState bs, size_t size);
ba5b7ad4 MA	328
23bd90d2	329	#define BDRV_SECTORS_PER_DIRTY_CHUNK 2048
6ea44308	330
7cd1e32a LS	331	void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable);
7cd1e32a LS	332	int bdrv_get_dirty(BlockDriverState *bs, int64_t sector);
a55eb92c JK	333	void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector,
a55eb92c JK	334	int nr_sectors);
aaa0eb75	335	int64_t bdrv_get_dirty_count(BlockDriverState *bs);
8b9b0cc2	336
53fec9d3 SH	337	void bdrv_enable_copy_on_read(BlockDriverState *bs);
	338	void bdrv_disable_copy_on_read(BlockDriverState *bs);
	339
db593f25 MT	340	void bdrv_set_in_use(BlockDriverState *bs, int in_use);
db593f25 MT	341	int bdrv_in_use(BlockDriverState *bs);
8b9b0cc2	342
a597e79c CH	343	enum BlockAcctType {
	344	BDRV_ACCT_READ,
	345	BDRV_ACCT_WRITE,
	346	BDRV_ACCT_FLUSH,
	347	BDRV_MAX_IOTYPE,
	348	};
	349
	350	typedef struct BlockAcctCookie {
	351	int64_t bytes;
c488c7f6	352	int64_t start_time_ns;
a597e79c CH	353	enum BlockAcctType type;
	354	} BlockAcctCookie;
	355
	356	void bdrv_acct_start(BlockDriverState bs, BlockAcctCookie cookie,
	357	int64_t bytes, enum BlockAcctType type);
	358	void bdrv_acct_done(BlockDriverState bs, BlockAcctCookie cookie);
	359
8b9b0cc2	360	typedef enum {
8252278a KW	361	BLKDBG_L1_UPDATE,
	362
	363	BLKDBG_L1_GROW_ALLOC_TABLE,
	364	BLKDBG_L1_GROW_WRITE_TABLE,
	365	BLKDBG_L1_GROW_ACTIVATE_TABLE,
	366
	367	BLKDBG_L2_LOAD,
	368	BLKDBG_L2_UPDATE,
	369	BLKDBG_L2_UPDATE_COMPRESSED,
	370	BLKDBG_L2_ALLOC_COW_READ,
	371	BLKDBG_L2_ALLOC_WRITE,
	372
8252278a	373	BLKDBG_READ_AIO,
8252278a KW	374	BLKDBG_READ_BACKING_AIO,
	375	BLKDBG_READ_COMPRESSED,
	376
	377	BLKDBG_WRITE_AIO,
	378	BLKDBG_WRITE_COMPRESSED,
	379
	380	BLKDBG_VMSTATE_LOAD,
	381	BLKDBG_VMSTATE_SAVE,
	382
	383	BLKDBG_COW_READ,
	384	BLKDBG_COW_WRITE,
	385
	386	BLKDBG_REFTABLE_LOAD,
	387	BLKDBG_REFTABLE_GROW,
	388
	389	BLKDBG_REFBLOCK_LOAD,
	390	BLKDBG_REFBLOCK_UPDATE,
	391	BLKDBG_REFBLOCK_UPDATE_PART,
	392	BLKDBG_REFBLOCK_ALLOC,
	393	BLKDBG_REFBLOCK_ALLOC_HOOKUP,
	394	BLKDBG_REFBLOCK_ALLOC_WRITE,
	395	BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS,
	396	BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE,
	397	BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE,
	398
	399	BLKDBG_CLUSTER_ALLOC,
	400	BLKDBG_CLUSTER_ALLOC_BYTES,
	401	BLKDBG_CLUSTER_FREE,
	402
8b9b0cc2 KW	403	BLKDBG_EVENT_MAX,
	404	} BlkDebugEvent;
	405
	406	#define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt)
	407	void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event);
	408
8a4bc5aa	409	#endif