[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_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 */
9f7965c7	83
ceb25e5c	84	#define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE \| BDRV_O_CACHE_WB \| BDRV_O_NO_FLUSH)
faf07963	85
6ea44308	86	#define BDRV_SECTOR_BITS 9
c63782cb	87	#define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS)
3abbc4d9	88	#define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1)
6ea44308	89
abd7f68d MA	90	typedef enum {
	91	BLOCK_ERR_REPORT, BLOCK_ERR_IGNORE, BLOCK_ERR_STOP_ENOSPC,
	92	BLOCK_ERR_STOP_ANY
	93	} BlockErrorAction;
	94
2582bfed LC	95	typedef enum {
2582bfed LC	96	BDRV_ACTION_REPORT, BDRV_ACTION_IGNORE, BDRV_ACTION_STOP
329c0a48	97	} BlockQMPEventAction;
2582bfed	98
28a7282a LC	99	void bdrv_iostatus_enable(BlockDriverState *bs);
	100	void bdrv_iostatus_reset(BlockDriverState *bs);
	101	void bdrv_iostatus_disable(BlockDriverState *bs);
	102	bool bdrv_iostatus_is_enabled(const BlockDriverState *bs);
	103	void bdrv_iostatus_set_err(BlockDriverState *bs, int error);
329c0a48 LC	104	void bdrv_emit_qmp_error_event(const BlockDriverState *bdrv,
329c0a48 LC	105	BlockQMPEventAction action, int is_read);
d15e5465 LC	106	void bdrv_info_print(Monitor mon, const QObject data);
d15e5465 LC	107	void bdrv_info(Monitor mon, QObject *ret_data);
218a536a LC	108	void bdrv_stats_print(Monitor mon, const QObject data);
218a536a LC	109	void bdrv_info_stats(Monitor mon, QObject *ret_data);
faf07963	110
0563e191 ZYW	111	/* disk I/O throttling */
0563e191 ZYW	112	void bdrv_io_limits_enable(BlockDriverState *bs);
98f90dba	113	void bdrv_io_limits_disable(BlockDriverState *bs);
0563e191 ZYW	114	bool bdrv_io_limits_enabled(BlockDriverState *bs);
0563e191 ZYW	115
faf07963	116	void bdrv_init(void);
eb852011	117	void bdrv_init_with_whitelist(void);
b50cbabc	118	BlockDriver bdrv_find_protocol(const char filename);
faf07963	119	BlockDriver bdrv_find_format(const char format_name);
eb852011	120	BlockDriver bdrv_find_whitelisted_format(const char format_name);
0e7e1989 KW	121	int bdrv_create(BlockDriver drv, const char filename,
0e7e1989 KW	122	QEMUOptionParameter *options);
84a12e66	123	int bdrv_create_file(const char* filename, QEMUOptionParameter *options);
faf07963	124	BlockDriverState bdrv_new(const char device_name);
d22b2f41	125	void bdrv_make_anon(BlockDriverState *bs);
4ddc07ca	126	void bdrv_swap(BlockDriverState bs_new, BlockDriverState bs_old);
8802d1fd	127	void bdrv_append(BlockDriverState bs_new, BlockDriverState bs_top);
faf07963	128	void bdrv_delete(BlockDriverState *bs);
c3993cdc	129	int bdrv_parse_cache_flags(const char mode, int flags);
faf07963	130	int bdrv_file_open(BlockDriverState *pbs, const char filename, int flags);
d6e9098e KW	131	int bdrv_open(BlockDriverState bs, const char filename, int flags,
d6e9098e KW	132	BlockDriver *drv);
faf07963	133	void bdrv_close(BlockDriverState *bs);
fa879d62 MA	134	int bdrv_attach_dev(BlockDriverState bs, void dev);
	135	void bdrv_attach_dev_nofail(BlockDriverState bs, void dev);
	136	void bdrv_detach_dev(BlockDriverState bs, void dev);
	137	void bdrv_get_attached_dev(BlockDriverState bs);
0e49de52 MA	138	void bdrv_set_dev_ops(BlockDriverState bs, const BlockDevOps ops,
0e49de52 MA	139	void *opaque);
025ccaa7	140	void bdrv_dev_eject_request(BlockDriverState *bs, bool force);
2c6942fa	141	bool bdrv_dev_has_removable_media(BlockDriverState *bs);
e4def80b	142	bool bdrv_dev_is_tray_open(BlockDriverState *bs);
f107639a	143	bool bdrv_dev_is_medium_locked(BlockDriverState *bs);
faf07963 PB	144	int bdrv_read(BlockDriverState *bs, int64_t sector_num,
faf07963 PB	145	uint8_t *buf, int nb_sectors);
07d27a44 MA	146	int bdrv_read_unthrottled(BlockDriverState *bs, int64_t sector_num,
07d27a44 MA	147	uint8_t *buf, int nb_sectors);
faf07963 PB	148	int bdrv_write(BlockDriverState *bs, int64_t sector_num,
	149	const uint8_t *buf, int nb_sectors);
	150	int bdrv_pread(BlockDriverState *bs, int64_t offset,
	151	void *buf, int count);
	152	int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
	153	const void *buf, int count);
f08145fe KW	154	int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset,
f08145fe KW	155	const void *buf, int count);
da1fa91d KW	156	int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num,
da1fa91d KW	157	int nb_sectors, QEMUIOVector *qiov);
470c0504 SH	158	int coroutine_fn bdrv_co_copy_on_readv(BlockDriverState *bs,
470c0504 SH	159	int64_t sector_num, int nb_sectors, QEMUIOVector *qiov);
da1fa91d KW	160	int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num,
da1fa91d KW	161	int nb_sectors, QEMUIOVector *qiov);
f08f2dda SH	162	/*
	163	* Efficiently zero a region of the disk image. Note that this is a regular
	164	* I/O request like read or write and should have a reasonable size. This
	165	* function is not suitable for zeroing the entire image in a single request
	166	* because it may allocate memory for the entire region.
	167	*/
	168	int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs, int64_t sector_num,
	169	int nb_sectors);
060f51c9 SH	170	int coroutine_fn bdrv_co_is_allocated(BlockDriverState *bs, int64_t sector_num,
060f51c9 SH	171	int nb_sectors, int *pnum);
188a7bbf PB	172	int coroutine_fn bdrv_co_is_allocated_above(BlockDriverState *top,
	173	BlockDriverState *base,
	174	int64_t sector_num,
	175	int nb_sectors, int *pnum);
e8a6bb9c MT	176	BlockDriverState bdrv_find_backing_image(BlockDriverState bs,
e8a6bb9c MT	177	const char *backing_file);
f198fd1c	178	int bdrv_get_backing_file_depth(BlockDriverState *bs);
faf07963 PB	179	int bdrv_truncate(BlockDriverState *bs, int64_t offset);
faf07963 PB	180	int64_t bdrv_getlength(BlockDriverState *bs);
4a1d5e1f	181	int64_t bdrv_get_allocated_file_size(BlockDriverState *bs);
96b8f136	182	void bdrv_get_geometry(BlockDriverState bs, uint64_t nb_sectors_ptr);
faf07963	183	int bdrv_commit(BlockDriverState *bs);
e8877497	184	int bdrv_commit_all(void);
756e6736 KW	185	int bdrv_change_backing_file(BlockDriverState *bs,
756e6736 KW	186	const char backing_file, const char backing_fmt);
5efa9d5a AL	187	void bdrv_register(BlockDriver *bdrv);
5efa9d5a AL	188
e076f338 KW	189
	190	typedef struct BdrvCheckResult {
	191	int corruptions;
	192	int leaks;
	193	int check_errors;
ccf34716 KW	194	int corruptions_fixed;
ccf34716 KW	195	int leaks_fixed;
f8111c24	196	BlockFragInfo bfi;
e076f338 KW	197	} BdrvCheckResult;
e076f338 KW	198
4534ff54 KW	199	typedef enum {
	200	BDRV_FIX_LEAKS = 1,
	201	BDRV_FIX_ERRORS = 2,
	202	} BdrvCheckMode;
	203
	204	int bdrv_check(BlockDriverState bs, BdrvCheckResult res, BdrvCheckMode fix);
e076f338	205
faf07963	206	/* async block I/O */
7cd1e32a	207	typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector,
39aa9a12	208	int sector_num);
3b69e4b9 AL	209	BlockDriverAIOCB bdrv_aio_readv(BlockDriverState bs, int64_t sector_num,
	210	QEMUIOVector *iov, int nb_sectors,
	211	BlockDriverCompletionFunc cb, void opaque);
	212	BlockDriverAIOCB bdrv_aio_writev(BlockDriverState bs, int64_t sector_num,
	213	QEMUIOVector *iov, int nb_sectors,
	214	BlockDriverCompletionFunc cb, void opaque);
b2e12bc6	215	BlockDriverAIOCB bdrv_aio_flush(BlockDriverState bs,
39aa9a12	216	BlockDriverCompletionFunc cb, void opaque);
4265d620 PB	217	BlockDriverAIOCB bdrv_aio_discard(BlockDriverState bs,
	218	int64_t sector_num, int nb_sectors,
	219	BlockDriverCompletionFunc cb, void opaque);
faf07963 PB	220	void bdrv_aio_cancel(BlockDriverAIOCB *acb);
faf07963 PB	221
40b4f539 KW	222	typedef struct BlockRequest {
	223	/* Fields to be filled by multiwrite caller */
	224	int64_t sector;
	225	int nb_sectors;
	226	QEMUIOVector *qiov;
	227	BlockDriverCompletionFunc *cb;
	228	void *opaque;
	229
	230	/* Filled by multiwrite implementation */
	231	int error;
	232	} BlockRequest;
	233
	234	int bdrv_aio_multiwrite(BlockDriverState bs, BlockRequest reqs,
	235	int num_reqs);
	236
7d780669	237	/* sg packet commands */
221f715d AL	238	int bdrv_ioctl(BlockDriverState bs, unsigned long int req, void buf);
	239	BlockDriverAIOCB bdrv_aio_ioctl(BlockDriverState bs,
	240	unsigned long int req, void *buf,
	241	BlockDriverCompletionFunc cb, void opaque);
7d780669	242
0f15423c AL	243	/* Invalidate any cached metadata used by image formats */
	244	void bdrv_invalidate_cache(BlockDriverState *bs);
	245	void bdrv_invalidate_cache_all(void);
	246
07789269 BC	247	void bdrv_clear_incoming_migration_all(void);
07789269 BC	248
faf07963	249	/* Ensure contents are flushed to disk. */
205ef796	250	int bdrv_flush(BlockDriverState *bs);
07f07615	251	int coroutine_fn bdrv_co_flush(BlockDriverState *bs);
c6ca28d6	252	void bdrv_flush_all(void);
2bc93fed	253	void bdrv_close_all(void);
922453bc	254	void bdrv_drain_all(void);
c6ca28d6	255
bb8bf76f	256	int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);
4265d620	257	int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors);
f2feebbd	258	int bdrv_has_zero_init(BlockDriverState *bs);
f58c7b35	259	int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
39aa9a12	260	int *pnum);
faf07963	261
abd7f68d MA	262	void bdrv_set_on_error(BlockDriverState *bs, BlockErrorAction on_read_error,
	263	BlockErrorAction on_write_error);
	264	BlockErrorAction bdrv_get_on_error(BlockDriverState *bs, int is_read);
faf07963	265	int bdrv_is_read_only(BlockDriverState *bs);
985a03b0	266	int bdrv_is_sg(BlockDriverState *bs);
e900a7b7	267	int bdrv_enable_write_cache(BlockDriverState *bs);
425b0148	268	void bdrv_set_enable_write_cache(BlockDriverState *bs, bool wce);
faf07963 PB	269	int bdrv_is_inserted(BlockDriverState *bs);
faf07963 PB	270	int bdrv_media_changed(BlockDriverState *bs);
025e849a	271	void bdrv_lock_medium(BlockDriverState *bs, bool locked);
f36f3949	272	void bdrv_eject(BlockDriverState *bs, bool eject_flag);
f8d6bba1	273	const char bdrv_get_format_name(BlockDriverState bs);
faf07963	274	BlockDriverState bdrv_find(const char name);
2f399b0a	275	BlockDriverState bdrv_next(BlockDriverState bs);
51de9760 AL	276	void bdrv_iterate(void (it)(void opaque, BlockDriverState *bs),
51de9760 AL	277	void *opaque);
faf07963	278	int bdrv_is_encrypted(BlockDriverState *bs);
c0f4ce77	279	int bdrv_key_required(BlockDriverState *bs);
faf07963	280	int bdrv_set_key(BlockDriverState bs, const char key);
c0f4ce77	281	int bdrv_query_missing_keys(void);
faf07963 PB	282	void bdrv_iterate_format(void (it)(void opaque, const char *name),
	283	void *opaque);
	284	const char bdrv_get_device_name(BlockDriverState bs);
c8433287	285	int bdrv_get_flags(BlockDriverState *bs);
faf07963 PB	286	int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
	287	const uint8_t *buf, int nb_sectors);
	288	int bdrv_get_info(BlockDriverState bs, BlockDriverInfo bdi);
	289
045df330	290	const char bdrv_get_encrypted_filename(BlockDriverState bs);
faf07963 PB	291	void bdrv_get_backing_filename(BlockDriverState *bs,
faf07963 PB	292	char *filename, int filename_size);
dc5a1371 PB	293	void bdrv_get_full_backing_filename(BlockDriverState *bs,
dc5a1371 PB	294	char *dest, size_t sz);
feeee5ac	295	int bdrv_can_snapshot(BlockDriverState *bs);
199630b6	296	int bdrv_is_snapshot(BlockDriverState *bs);
f9092b10	297	BlockDriverState *bdrv_snapshots(void);
faf07963 PB	298	int bdrv_snapshot_create(BlockDriverState *bs,
	299	QEMUSnapshotInfo *sn_info);
	300	int bdrv_snapshot_goto(BlockDriverState *bs,
	301	const char *snapshot_id);
	302	int bdrv_snapshot_delete(BlockDriverState bs, const char snapshot_id);
	303	int bdrv_snapshot_list(BlockDriverState *bs,
	304	QEMUSnapshotInfo **psn_info);
51ef6727	305	int bdrv_snapshot_load_tmp(BlockDriverState *bs,
51ef6727	306	const char *snapshot_name);
faf07963 PB	307	char bdrv_snapshot_dump(char buf, int buf_size, QEMUSnapshotInfo *sn);
	308
	309	char get_human_readable_size(char buf, int buf_size, int64_t size);
	310	int path_is_absolute(const char *path);
	311	void path_combine(char *dest, int dest_size,
	312	const char *base_path,
	313	const char *filename);
	314
45566e9c CH	315	int bdrv_save_vmstate(BlockDriverState bs, const uint8_t buf,
45566e9c CH	316	int64_t pos, int size);
178e08a5	317
45566e9c CH	318	int bdrv_load_vmstate(BlockDriverState bs, uint8_t buf,
45566e9c CH	319	int64_t pos, int size);
178e08a5	320
f88e1a42 JS	321	int bdrv_img_create(const char filename, const char fmt,
	322	const char base_filename, const char base_fmt,
	323	char *options, uint64_t img_size, int flags);
	324
7b6f9300	325	void bdrv_set_buffer_alignment(BlockDriverState *bs, int align);
ba5b7ad4 MA	326	void qemu_blockalign(BlockDriverState bs, size_t size);
ba5b7ad4 MA	327
23bd90d2	328	#define BDRV_SECTORS_PER_DIRTY_CHUNK 2048
6ea44308	329
7cd1e32a	330	void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable);
7cd1e32a	331	int bdrv_get_dirty(BlockDriverState *bs, int64_t sector);
a55eb92c JK	332	void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector,
a55eb92c JK	333	int nr_sectors);
aaa0eb75	334	int64_t bdrv_get_dirty_count(BlockDriverState *bs);
8b9b0cc2	335
53fec9d3 SH	336	void bdrv_enable_copy_on_read(BlockDriverState *bs);
	337	void bdrv_disable_copy_on_read(BlockDriverState *bs);
	338
db593f25 MT	339	void bdrv_set_in_use(BlockDriverState *bs, int in_use);
db593f25 MT	340	int bdrv_in_use(BlockDriverState *bs);
8b9b0cc2	341
a597e79c CH	342	enum BlockAcctType {
	343	BDRV_ACCT_READ,
	344	BDRV_ACCT_WRITE,
	345	BDRV_ACCT_FLUSH,
	346	BDRV_MAX_IOTYPE,
	347	};
	348
	349	typedef struct BlockAcctCookie {
	350	int64_t bytes;
c488c7f6	351	int64_t start_time_ns;
a597e79c CH	352	enum BlockAcctType type;
	353	} BlockAcctCookie;
	354
	355	void bdrv_acct_start(BlockDriverState bs, BlockAcctCookie cookie,
	356	int64_t bytes, enum BlockAcctType type);
	357	void bdrv_acct_done(BlockDriverState bs, BlockAcctCookie cookie);
	358
8b9b0cc2	359	typedef enum {
8252278a KW	360	BLKDBG_L1_UPDATE,
	361
	362	BLKDBG_L1_GROW_ALLOC_TABLE,
	363	BLKDBG_L1_GROW_WRITE_TABLE,
	364	BLKDBG_L1_GROW_ACTIVATE_TABLE,
	365
	366	BLKDBG_L2_LOAD,
	367	BLKDBG_L2_UPDATE,
	368	BLKDBG_L2_UPDATE_COMPRESSED,
	369	BLKDBG_L2_ALLOC_COW_READ,
	370	BLKDBG_L2_ALLOC_WRITE,
	371
8252278a	372	BLKDBG_READ_AIO,
8252278a KW	373	BLKDBG_READ_BACKING_AIO,
	374	BLKDBG_READ_COMPRESSED,
	375
	376	BLKDBG_WRITE_AIO,
	377	BLKDBG_WRITE_COMPRESSED,
	378
	379	BLKDBG_VMSTATE_LOAD,
	380	BLKDBG_VMSTATE_SAVE,
	381
	382	BLKDBG_COW_READ,
	383	BLKDBG_COW_WRITE,
	384
	385	BLKDBG_REFTABLE_LOAD,
	386	BLKDBG_REFTABLE_GROW,
	387
	388	BLKDBG_REFBLOCK_LOAD,
	389	BLKDBG_REFBLOCK_UPDATE,
	390	BLKDBG_REFBLOCK_UPDATE_PART,
	391	BLKDBG_REFBLOCK_ALLOC,
	392	BLKDBG_REFBLOCK_ALLOC_HOOKUP,
	393	BLKDBG_REFBLOCK_ALLOC_WRITE,
	394	BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS,
	395	BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE,
	396	BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE,
	397
	398	BLKDBG_CLUSTER_ALLOC,
	399	BLKDBG_CLUSTER_ALLOC_BYTES,
	400	BLKDBG_CLUSTER_FREE,
	401
8b9b0cc2 KW	402	BLKDBG_EVENT_MAX,
	403	} BlkDebugEvent;
	404
	405	#define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt)
	406	void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event);
	407
8a4bc5aa	408	#endif