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#ifndef BLOCK_H
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#define BLOCK_H
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#include "qemu-aio.h" |
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#include "qemu-common.h" |
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#include "qemu-option.h" |
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#include "qemu-coroutine.h" |
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#include "qobject.h" |
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|
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/* block.c */
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typedef struct BlockDriver BlockDriver; |
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typedef struct BlockDriverInfo { |
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/* in bytes, 0 if irrelevant */
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int cluster_size;
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/* offset at which the VM state can be saved (0 if not possible) */
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int64_t vm_state_offset; |
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bool is_dirty;
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} BlockDriverInfo; |
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|
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typedef struct BlockFragInfo { |
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uint64_t allocated_clusters; |
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uint64_t total_clusters; |
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uint64_t fragmented_clusters; |
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} BlockFragInfo; |
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|
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typedef struct QEMUSnapshotInfo { |
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char id_str[128]; /* unique snapshot id */ |
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/* the following fields are informative. They are not needed for
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the consistency of the snapshot */
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char name[256]; /* user chosen name */ |
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uint64_t vm_state_size; /* VM state info size */
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uint32_t date_sec; /* UTC date of the snapshot */
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uint32_t date_nsec; |
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uint64_t vm_clock_nsec; /* VM clock relative to boot */
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} QEMUSnapshotInfo; |
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|
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/* Callbacks for block device models */
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typedef struct BlockDevOps { |
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/*
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* Runs when virtual media changed (monitor commands eject, change)
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* Argument load is true on load and false on eject.
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* Beware: doesn't run when a host device's physical media
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* changes. Sure would be useful if it did.
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* Device models with removable media must implement this callback.
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*/
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void (*change_media_cb)(void *opaque, bool load); |
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/*
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* Runs when an eject request is issued from the monitor, the tray
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* is closed, and the medium is locked.
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* Device models that do not implement is_medium_locked will not need
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* this callback. Device models that can lock the medium or tray might
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* want to implement the callback and unlock the tray when "force" is
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* true, even if they do not support eject requests.
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*/
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void (*eject_request_cb)(void *opaque, bool force); |
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/*
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* Is the virtual tray open?
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* Device models implement this only when the device has a tray.
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*/
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bool (*is_tray_open)(void *opaque); |
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/*
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* Is the virtual medium locked into the device?
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* Device models implement this only when device has such a lock.
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*/
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bool (*is_medium_locked)(void *opaque); |
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/*
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* Runs when the size changed (e.g. monitor command block_resize)
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*/
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void (*resize_cb)(void *opaque); |
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} BlockDevOps; |
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|
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#define BDRV_O_RDWR 0x0002 |
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#define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */ |
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#define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */ |
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#define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */ |
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#define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */ |
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#define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */ |
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#define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */ |
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#define BDRV_O_COPY_ON_READ 0x0400 /* copy read backing sectors into image */ |
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#define BDRV_O_INCOMING 0x0800 /* consistency hint for incoming migration */ |
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|
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#define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH)
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|
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#define BDRV_SECTOR_BITS 9 |
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#define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS) |
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#define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1) |
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|
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typedef enum { |
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BLOCK_ERR_REPORT, BLOCK_ERR_IGNORE, BLOCK_ERR_STOP_ENOSPC, |
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BLOCK_ERR_STOP_ANY |
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} BlockErrorAction; |
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typedef enum { |
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BDRV_ACTION_REPORT, BDRV_ACTION_IGNORE, BDRV_ACTION_STOP |
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} BlockQMPEventAction; |
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|
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void bdrv_iostatus_enable(BlockDriverState *bs);
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void bdrv_iostatus_reset(BlockDriverState *bs);
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void bdrv_iostatus_disable(BlockDriverState *bs);
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bool bdrv_iostatus_is_enabled(const BlockDriverState *bs); |
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void bdrv_iostatus_set_err(BlockDriverState *bs, int error); |
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void bdrv_emit_qmp_error_event(const BlockDriverState *bdrv, |
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BlockQMPEventAction action, int is_read);
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void bdrv_info_print(Monitor *mon, const QObject *data); |
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void bdrv_info(Monitor *mon, QObject **ret_data);
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void bdrv_stats_print(Monitor *mon, const QObject *data); |
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void bdrv_info_stats(Monitor *mon, QObject **ret_data);
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|
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/* disk I/O throttling */
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void bdrv_io_limits_enable(BlockDriverState *bs);
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void bdrv_io_limits_disable(BlockDriverState *bs);
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bool bdrv_io_limits_enabled(BlockDriverState *bs);
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|
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void bdrv_init(void); |
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void bdrv_init_with_whitelist(void); |
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BlockDriver *bdrv_find_protocol(const char *filename); |
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BlockDriver *bdrv_find_format(const char *format_name); |
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BlockDriver *bdrv_find_whitelisted_format(const char *format_name); |
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int bdrv_create(BlockDriver *drv, const char* filename, |
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QEMUOptionParameter *options); |
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int bdrv_create_file(const char* filename, QEMUOptionParameter *options); |
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BlockDriverState *bdrv_new(const char *device_name); |
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void bdrv_make_anon(BlockDriverState *bs);
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void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top);
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void bdrv_delete(BlockDriverState *bs);
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int bdrv_parse_cache_flags(const char *mode, int *flags); |
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int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags); |
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int bdrv_open(BlockDriverState *bs, const char *filename, int flags, |
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BlockDriver *drv); |
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void bdrv_close(BlockDriverState *bs);
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int bdrv_attach_dev(BlockDriverState *bs, void *dev); |
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void bdrv_attach_dev_nofail(BlockDriverState *bs, void *dev); |
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void bdrv_detach_dev(BlockDriverState *bs, void *dev); |
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void *bdrv_get_attached_dev(BlockDriverState *bs);
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void bdrv_set_dev_ops(BlockDriverState *bs, const BlockDevOps *ops, |
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void *opaque);
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void bdrv_dev_eject_request(BlockDriverState *bs, bool force); |
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bool bdrv_dev_has_removable_media(BlockDriverState *bs);
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bool bdrv_dev_is_tray_open(BlockDriverState *bs);
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bool bdrv_dev_is_medium_locked(BlockDriverState *bs);
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int bdrv_read(BlockDriverState *bs, int64_t sector_num,
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uint8_t *buf, int nb_sectors);
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int bdrv_write(BlockDriverState *bs, int64_t sector_num,
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const uint8_t *buf, int nb_sectors); |
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int bdrv_pread(BlockDriverState *bs, int64_t offset,
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void *buf, int count); |
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int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
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const void *buf, int count); |
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int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset,
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const void *buf, int count); |
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int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num,
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int nb_sectors, QEMUIOVector *qiov);
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int coroutine_fn bdrv_co_copy_on_readv(BlockDriverState *bs,
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int64_t sector_num, int nb_sectors, QEMUIOVector *qiov);
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int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num,
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int nb_sectors, QEMUIOVector *qiov);
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/*
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* Efficiently zero a region of the disk image. Note that this is a regular
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* I/O request like read or write and should have a reasonable size. This
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* function is not suitable for zeroing the entire image in a single request
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* because it may allocate memory for the entire region.
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*/
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int coroutine_fn bdrv_co_write_zeroes(BlockDriverState *bs, int64_t sector_num,
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int nb_sectors);
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int coroutine_fn bdrv_co_is_allocated(BlockDriverState *bs, int64_t sector_num,
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int nb_sectors, int *pnum); |
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int coroutine_fn bdrv_co_is_allocated_above(BlockDriverState *top,
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BlockDriverState *base, |
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int64_t sector_num, |
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int nb_sectors, int *pnum); |
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BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs, |
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const char *backing_file); |
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int bdrv_truncate(BlockDriverState *bs, int64_t offset);
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int64_t bdrv_getlength(BlockDriverState *bs); |
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int64_t bdrv_get_allocated_file_size(BlockDriverState *bs); |
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void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr);
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void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs); |
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int bdrv_commit(BlockDriverState *bs);
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int bdrv_commit_all(void); |
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int bdrv_change_backing_file(BlockDriverState *bs,
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const char *backing_file, const char *backing_fmt); |
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void bdrv_register(BlockDriver *bdrv);
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typedef struct BdrvCheckResult { |
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int corruptions;
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int leaks;
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int check_errors;
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int corruptions_fixed;
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int leaks_fixed;
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BlockFragInfo bfi; |
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} BdrvCheckResult; |
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typedef enum { |
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BDRV_FIX_LEAKS = 1,
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BDRV_FIX_ERRORS = 2,
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} BdrvCheckMode; |
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int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix);
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/* async block I/O */
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typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector, |
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int sector_num);
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BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, |
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QEMUIOVector *iov, int nb_sectors,
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BlockDriverCompletionFunc *cb, void *opaque);
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BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, |
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QEMUIOVector *iov, int nb_sectors,
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BlockDriverCompletionFunc *cb, void *opaque);
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BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs, |
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BlockDriverCompletionFunc *cb, void *opaque);
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BlockDriverAIOCB *bdrv_aio_discard(BlockDriverState *bs, |
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int64_t sector_num, int nb_sectors,
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BlockDriverCompletionFunc *cb, void *opaque);
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void bdrv_aio_cancel(BlockDriverAIOCB *acb);
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typedef struct BlockRequest { |
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/* Fields to be filled by multiwrite caller */
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int64_t sector; |
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int nb_sectors;
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QEMUIOVector *qiov; |
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BlockDriverCompletionFunc *cb; |
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void *opaque;
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/* Filled by multiwrite implementation */
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int error;
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} BlockRequest; |
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int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs,
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int num_reqs);
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/* sg packet commands */
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int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf); |
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BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, |
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unsigned long int req, void *buf, |
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BlockDriverCompletionFunc *cb, void *opaque);
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|
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/* Invalidate any cached metadata used by image formats */
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void bdrv_invalidate_cache(BlockDriverState *bs);
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void bdrv_invalidate_cache_all(void); |
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|
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void bdrv_clear_incoming_migration_all(void); |
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/* Ensure contents are flushed to disk. */
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int bdrv_flush(BlockDriverState *bs);
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int coroutine_fn bdrv_co_flush(BlockDriverState *bs);
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void bdrv_flush_all(void); |
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void bdrv_close_all(void); |
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void bdrv_drain_all(void); |
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|
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int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); |
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int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); |
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int bdrv_has_zero_init(BlockDriverState *bs);
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int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, |
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int *pnum);
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|
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#define BIOS_ATA_TRANSLATION_AUTO 0 |
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#define BIOS_ATA_TRANSLATION_NONE 1 |
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#define BIOS_ATA_TRANSLATION_LBA 2 |
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#define BIOS_ATA_TRANSLATION_LARGE 3 |
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#define BIOS_ATA_TRANSLATION_RECHS 4 |
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|
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void bdrv_set_geometry_hint(BlockDriverState *bs,
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int cyls, int heads, int secs); |
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void bdrv_set_translation_hint(BlockDriverState *bs, int translation); |
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void bdrv_get_geometry_hint(BlockDriverState *bs,
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int *pcyls, int *pheads, int *psecs); |
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typedef enum FDriveType { |
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FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */ |
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FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */ |
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FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */ |
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FDRIVE_DRV_NONE = 0x03, /* No drive connected */ |
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} FDriveType; |
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|
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typedef enum FDriveRate { |
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FDRIVE_RATE_500K = 0x00, /* 500 Kbps */ |
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FDRIVE_RATE_300K = 0x01, /* 300 Kbps */ |
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FDRIVE_RATE_250K = 0x02, /* 250 Kbps */ |
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FDRIVE_RATE_1M = 0x03, /* 1 Mbps */ |
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} FDriveRate; |
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|
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void bdrv_get_floppy_geometry_hint(BlockDriverState *bs, int *nb_heads, |
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int *max_track, int *last_sect, |
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FDriveType drive_in, FDriveType *drive, |
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FDriveRate *rate); |
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int bdrv_get_translation_hint(BlockDriverState *bs);
|
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void bdrv_set_on_error(BlockDriverState *bs, BlockErrorAction on_read_error,
|
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BlockErrorAction on_write_error); |
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BlockErrorAction bdrv_get_on_error(BlockDriverState *bs, int is_read);
|
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int bdrv_is_read_only(BlockDriverState *bs);
|
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int bdrv_is_sg(BlockDriverState *bs);
|
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int bdrv_enable_write_cache(BlockDriverState *bs);
|
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void bdrv_set_enable_write_cache(BlockDriverState *bs, bool wce); |
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int bdrv_is_inserted(BlockDriverState *bs);
|
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int bdrv_media_changed(BlockDriverState *bs);
|
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void bdrv_lock_medium(BlockDriverState *bs, bool locked); |
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void bdrv_eject(BlockDriverState *bs, bool eject_flag); |
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const char *bdrv_get_format_name(BlockDriverState *bs); |
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BlockDriverState *bdrv_find(const char *name); |
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BlockDriverState *bdrv_next(BlockDriverState *bs); |
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void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs), |
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void *opaque);
|
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int bdrv_is_encrypted(BlockDriverState *bs);
|
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int bdrv_key_required(BlockDriverState *bs);
|
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int bdrv_set_key(BlockDriverState *bs, const char *key); |
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int bdrv_query_missing_keys(void); |
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void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
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void *opaque);
|
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const char *bdrv_get_device_name(BlockDriverState *bs); |
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int bdrv_get_flags(BlockDriverState *bs);
|
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int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
|
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const uint8_t *buf, int nb_sectors); |
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int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi);
|
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|
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const char *bdrv_get_encrypted_filename(BlockDriverState *bs); |
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void bdrv_get_backing_filename(BlockDriverState *bs,
|
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char *filename, int filename_size); |
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void bdrv_get_full_backing_filename(BlockDriverState *bs,
|
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char *dest, size_t sz);
|
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int bdrv_can_snapshot(BlockDriverState *bs);
|
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int bdrv_is_snapshot(BlockDriverState *bs);
|
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BlockDriverState *bdrv_snapshots(void);
|
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int bdrv_snapshot_create(BlockDriverState *bs,
|
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QEMUSnapshotInfo *sn_info); |
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int bdrv_snapshot_goto(BlockDriverState *bs,
|
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const char *snapshot_id); |
328 |
int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id); |
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int bdrv_snapshot_list(BlockDriverState *bs,
|
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QEMUSnapshotInfo **psn_info); |
331 |
int bdrv_snapshot_load_tmp(BlockDriverState *bs,
|
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const char *snapshot_name); |
333 |
char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn); |
334 |
|
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char *get_human_readable_size(char *buf, int buf_size, int64_t size); |
336 |
int path_is_absolute(const char *path); |
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void path_combine(char *dest, int dest_size, |
338 |
const char *base_path, |
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const char *filename); |
340 |
|
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int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, |
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int64_t pos, int size);
|
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|
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int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf,
|
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int64_t pos, int size);
|
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|
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int bdrv_img_create(const char *filename, const char *fmt, |
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const char *base_filename, const char *base_fmt, |
349 |
char *options, uint64_t img_size, int flags); |
350 |
|
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void bdrv_set_buffer_alignment(BlockDriverState *bs, int align); |
352 |
void *qemu_blockalign(BlockDriverState *bs, size_t size);
|
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|
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#define BDRV_SECTORS_PER_DIRTY_CHUNK 2048 |
355 |
|
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void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable); |
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int bdrv_get_dirty(BlockDriverState *bs, int64_t sector);
|
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void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector,
|
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int nr_sectors);
|
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int64_t bdrv_get_dirty_count(BlockDriverState *bs); |
361 |
|
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void bdrv_enable_copy_on_read(BlockDriverState *bs);
|
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void bdrv_disable_copy_on_read(BlockDriverState *bs);
|
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|
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void bdrv_set_in_use(BlockDriverState *bs, int in_use); |
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int bdrv_in_use(BlockDriverState *bs);
|
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|
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enum BlockAcctType {
|
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BDRV_ACCT_READ, |
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BDRV_ACCT_WRITE, |
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BDRV_ACCT_FLUSH, |
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BDRV_MAX_IOTYPE, |
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}; |
374 |
|
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typedef struct BlockAcctCookie { |
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int64_t bytes; |
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int64_t start_time_ns; |
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enum BlockAcctType type;
|
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} BlockAcctCookie; |
380 |
|
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void bdrv_acct_start(BlockDriverState *bs, BlockAcctCookie *cookie,
|
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int64_t bytes, enum BlockAcctType type);
|
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void bdrv_acct_done(BlockDriverState *bs, BlockAcctCookie *cookie);
|
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|
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typedef enum { |
386 |
BLKDBG_L1_UPDATE, |
387 |
|
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BLKDBG_L1_GROW_ALLOC_TABLE, |
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BLKDBG_L1_GROW_WRITE_TABLE, |
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BLKDBG_L1_GROW_ACTIVATE_TABLE, |
391 |
|
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BLKDBG_L2_LOAD, |
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BLKDBG_L2_UPDATE, |
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BLKDBG_L2_UPDATE_COMPRESSED, |
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BLKDBG_L2_ALLOC_COW_READ, |
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BLKDBG_L2_ALLOC_WRITE, |
397 |
|
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BLKDBG_READ_AIO, |
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BLKDBG_READ_BACKING_AIO, |
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BLKDBG_READ_COMPRESSED, |
401 |
|
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BLKDBG_WRITE_AIO, |
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BLKDBG_WRITE_COMPRESSED, |
404 |
|
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BLKDBG_VMSTATE_LOAD, |
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BLKDBG_VMSTATE_SAVE, |
407 |
|
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BLKDBG_COW_READ, |
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BLKDBG_COW_WRITE, |
410 |
|
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BLKDBG_REFTABLE_LOAD, |
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BLKDBG_REFTABLE_GROW, |
413 |
|
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BLKDBG_REFBLOCK_LOAD, |
415 |
BLKDBG_REFBLOCK_UPDATE, |
416 |
BLKDBG_REFBLOCK_UPDATE_PART, |
417 |
BLKDBG_REFBLOCK_ALLOC, |
418 |
BLKDBG_REFBLOCK_ALLOC_HOOKUP, |
419 |
BLKDBG_REFBLOCK_ALLOC_WRITE, |
420 |
BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS, |
421 |
BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE, |
422 |
BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE, |
423 |
|
424 |
BLKDBG_CLUSTER_ALLOC, |
425 |
BLKDBG_CLUSTER_ALLOC_BYTES, |
426 |
BLKDBG_CLUSTER_FREE, |
427 |
|
428 |
BLKDBG_EVENT_MAX, |
429 |
} BlkDebugEvent; |
430 |
|
431 |
#define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt)
|
432 |
void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event);
|
433 |
|
434 |
|
435 |
/* Convenience for block device models */
|
436 |
|
437 |
typedef struct BlockConf { |
438 |
BlockDriverState *bs; |
439 |
uint16_t physical_block_size; |
440 |
uint16_t logical_block_size; |
441 |
uint16_t min_io_size; |
442 |
uint32_t opt_io_size; |
443 |
int32_t bootindex; |
444 |
uint32_t discard_granularity; |
445 |
} BlockConf; |
446 |
|
447 |
static inline unsigned int get_physical_block_exp(BlockConf *conf) |
448 |
{ |
449 |
unsigned int exp = 0, size; |
450 |
|
451 |
for (size = conf->physical_block_size;
|
452 |
size > conf->logical_block_size; |
453 |
size >>= 1) {
|
454 |
exp++; |
455 |
} |
456 |
|
457 |
return exp;
|
458 |
} |
459 |
|
460 |
#define DEFINE_BLOCK_PROPERTIES(_state, _conf) \
|
461 |
DEFINE_PROP_DRIVE("drive", _state, _conf.bs), \
|
462 |
DEFINE_PROP_BLOCKSIZE("logical_block_size", _state, \
|
463 |
_conf.logical_block_size, 512), \
|
464 |
DEFINE_PROP_BLOCKSIZE("physical_block_size", _state, \
|
465 |
_conf.physical_block_size, 512), \
|
466 |
DEFINE_PROP_UINT16("min_io_size", _state, _conf.min_io_size, 0), \ |
467 |
DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 0), \ |
468 |
DEFINE_PROP_INT32("bootindex", _state, _conf.bootindex, -1), \ |
469 |
DEFINE_PROP_UINT32("discard_granularity", _state, \
|
470 |
_conf.discard_granularity, 0)
|
471 |
|
472 |
#endif
|
473 |
|