--- /dev/null
+#ifndef BLOCK_H
+#define BLOCK_H
+
+#include "block/aio.h"
+#include "qemu-common.h"
+#include "qemu/option.h"
+#include "block/coroutine.h"
+#include "block/accounting.h"
+#include "qapi/qmp/qobject.h"
+#include "qapi-types.h"
+
+/* block.c */
+typedef struct BlockDriver BlockDriver;
+typedef struct BlockJob BlockJob;
+typedef struct BdrvChild BdrvChild;
+typedef struct BdrvChildRole BdrvChildRole;
+
+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;
+ /*
+ * True if unallocated blocks read back as zeroes. This is equivalent
+ * to the the LBPRZ flag in the SCSI logical block provisioning page.
+ */
+ bool unallocated_blocks_are_zero;
+ /*
+ * True if the driver can optimize writing zeroes by unmapping
+ * sectors. This is equivalent to the BLKDISCARDZEROES ioctl in Linux
+ * with the difference that in qemu a discard is allowed to silently
+ * fail. Therefore we have to use bdrv_write_zeroes with the
+ * BDRV_REQ_MAY_UNMAP flag for an optimized zero write with unmapping.
+ * After this call the driver has to guarantee that the contents read
+ * back as zero. It is additionally required that the block device is
+ * opened with BDRV_O_UNMAP flag for this to work.
+ */
+ bool can_write_zeroes_with_unmap;
+ /*
+ * True if this block driver only supports compressed writes
+ */
+ bool needs_compressed_writes;
+} BlockDriverInfo;
+
+typedef struct BlockFragInfo {
+ uint64_t allocated_clusters;
+ uint64_t total_clusters;
+ uint64_t fragmented_clusters;
+ uint64_t compressed_clusters;
+} BlockFragInfo;
+
+typedef enum {
+ BDRV_REQ_COPY_ON_READ = 0x1,
+ BDRV_REQ_ZERO_WRITE = 0x2,
+ /* The BDRV_REQ_MAY_UNMAP flag is used to indicate that the block driver
+ * is allowed to optimize a write zeroes request by unmapping (discarding)
+ * blocks if it is guaranteed that the result will read back as
+ * zeroes. The flag is only passed to the driver if the block device is
+ * opened with BDRV_O_UNMAP.
+ */
+ BDRV_REQ_MAY_UNMAP = 0x4,
+} BdrvRequestFlags;
+
+typedef struct BlockSizes {
+ uint32_t phys;
+ uint32_t log;
+} BlockSizes;
+
+typedef struct HDGeometry {
+ uint32_t heads;
+ uint32_t sectors;
+ uint32_t cylinders;
+} HDGeometry;
+
+#define BDRV_O_RDWR 0x0002
+#define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */
+#define BDRV_O_TEMPORARY 0x0010 /* delete the file after use */
+#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_UNMAP 0x4000 /* execute guest UNMAP/TRIM operations */
+#define BDRV_O_PROTOCOL 0x8000 /* if no block driver is explicitly given:
+ select an appropriate protocol driver,
+ ignoring the format layer */
+
+#define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH)
+
+
+/* Option names of options parsed by the block layer */
+
+#define BDRV_OPT_CACHE_WB "cache.writeback"
+#define BDRV_OPT_CACHE_DIRECT "cache.direct"
+#define BDRV_OPT_CACHE_NO_FLUSH "cache.no-flush"
+
+
+#define BDRV_SECTOR_BITS 9
+#define BDRV_SECTOR_SIZE (1ULL << BDRV_SECTOR_BITS)
+#define BDRV_SECTOR_MASK ~(BDRV_SECTOR_SIZE - 1)
+
+#define BDRV_REQUEST_MAX_SECTORS MIN(SIZE_MAX >> BDRV_SECTOR_BITS, \
+ INT_MAX >> BDRV_SECTOR_BITS)
+
+/*
+ * Allocation status flags
+ * BDRV_BLOCK_DATA: data is read from bs->file or another file
+ * BDRV_BLOCK_ZERO: sectors read as zero
+ * BDRV_BLOCK_OFFSET_VALID: sector stored in bs->file as raw data
+ * BDRV_BLOCK_ALLOCATED: the content of the block is determined by this
+ * layer (as opposed to the backing file)
+ * BDRV_BLOCK_RAW: used internally to indicate that the request
+ * was answered by the raw driver and that one
+ * should look in bs->file directly.
+ *
+ * If BDRV_BLOCK_OFFSET_VALID is set, bits 9-62 represent the offset in
+ * bs->file where sector data can be read from as raw data.
+ *
+ * DATA == 0 && ZERO == 0 means that data is read from backing_hd if present.
+ *
+ * DATA ZERO OFFSET_VALID
+ * t t t sectors read as zero, bs->file is zero at offset
+ * t f t sectors read as valid from bs->file at offset
+ * f t t sectors preallocated, read as zero, bs->file not
+ * necessarily zero at offset
+ * f f t sectors preallocated but read from backing_hd,
+ * bs->file contains garbage at offset
+ * t t f sectors preallocated, read as zero, unknown offset
+ * t f f sectors read from unknown file or offset
+ * f t f not allocated or unknown offset, read as zero
+ * f f f not allocated or unknown offset, read from backing_hd
+ */
+#define BDRV_BLOCK_DATA 0x01
+#define BDRV_BLOCK_ZERO 0x02
+#define BDRV_BLOCK_OFFSET_VALID 0x04
+#define BDRV_BLOCK_RAW 0x08
+#define BDRV_BLOCK_ALLOCATED 0x10
+#define BDRV_BLOCK_OFFSET_MASK BDRV_SECTOR_MASK
+
+typedef QSIMPLEQ_HEAD(BlockReopenQueue, BlockReopenQueueEntry) BlockReopenQueue;
+
+typedef struct BDRVReopenState {
+ BlockDriverState *bs;
+ int flags;
+ void *opaque;
+} BDRVReopenState;
+
+/*
+ * Block operation types
+ */
+typedef enum BlockOpType {
+ BLOCK_OP_TYPE_BACKUP_SOURCE,
+ BLOCK_OP_TYPE_BACKUP_TARGET,
+ BLOCK_OP_TYPE_CHANGE,
+ BLOCK_OP_TYPE_COMMIT_SOURCE,
+ BLOCK_OP_TYPE_COMMIT_TARGET,
+ BLOCK_OP_TYPE_DATAPLANE,
+ BLOCK_OP_TYPE_DRIVE_DEL,
+ BLOCK_OP_TYPE_EJECT,
+ BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT,
+ BLOCK_OP_TYPE_INTERNAL_SNAPSHOT,
+ BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE,
+ BLOCK_OP_TYPE_MIRROR,
+ BLOCK_OP_TYPE_RESIZE,
+ BLOCK_OP_TYPE_STREAM,
+ BLOCK_OP_TYPE_REPLACE,
+ BLOCK_OP_TYPE_MAX,
+} BlockOpType;
+
+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_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, const char *group);
+void bdrv_io_limits_disable(BlockDriverState *bs);
+void bdrv_io_limits_update_group(BlockDriverState *bs, const char *group);
+
+void bdrv_init(void);
+void bdrv_init_with_whitelist(void);
+BlockDriver *bdrv_find_protocol(const char *filename,
+ bool allow_protocol_prefix,
+ Error **errp);
+BlockDriver *bdrv_find_format(const char *format_name);
+BlockDriver *bdrv_find_whitelisted_format(const char *format_name,
+ bool readonly);
+int bdrv_create(BlockDriver *drv, const char* filename,
+ QemuOpts *opts, Error **errp);
+int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp);
+BlockDriverState *bdrv_new_root(void);
+BlockDriverState *bdrv_new(void);
+void bdrv_make_anon(BlockDriverState *bs);
+void bdrv_swap(BlockDriverState *bs_new, BlockDriverState *bs_old);
+void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top);
+int bdrv_parse_cache_flags(const char *mode, int *flags);
+int bdrv_parse_discard_flags(const char *mode, int *flags);
+int bdrv_open_image(BlockDriverState **pbs, const char *filename,
+ QDict *options, const char *bdref_key,
+ BlockDriverState* parent, const BdrvChildRole *child_role,
+ bool allow_none, Error **errp);
+BdrvChild *bdrv_open_child(const char *filename,
+ QDict *options, const char *bdref_key,
+ BlockDriverState* parent,
+ const BdrvChildRole *child_role,
+ bool allow_none, Error **errp);
+void bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd);
+int bdrv_open_backing_file(BlockDriverState *bs, QDict *options, Error **errp);
+int bdrv_append_temp_snapshot(BlockDriverState *bs, int flags, Error **errp);
+int bdrv_open(BlockDriverState **pbs, const char *filename,
+ const char *reference, QDict *options, int flags,
+ BlockDriver *drv, Error **errp);
+BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue,
+ BlockDriverState *bs, int flags);
+int bdrv_reopen_multiple(BlockReopenQueue *bs_queue, Error **errp);
+int bdrv_reopen(BlockDriverState *bs, int bdrv_flags, Error **errp);
+int bdrv_reopen_prepare(BDRVReopenState *reopen_state,
+ BlockReopenQueue *queue, Error **errp);
+void bdrv_reopen_commit(BDRVReopenState *reopen_state);
+void bdrv_reopen_abort(BDRVReopenState *reopen_state);
+void bdrv_close(BlockDriverState *bs);
+void bdrv_add_close_notifier(BlockDriverState *bs, Notifier *notify);
+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_write_zeroes(BlockDriverState *bs, int64_t sector_num,
+ int nb_sectors, BdrvRequestFlags flags);
+BlockAIOCB *bdrv_aio_write_zeroes(BlockDriverState *bs, int64_t sector_num,
+ int nb_sectors, BdrvRequestFlags flags,
+ BlockCompletionFunc *cb, void *opaque);
+int bdrv_make_zero(BlockDriverState *bs, BdrvRequestFlags flags);
+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_pwritev(BlockDriverState *bs, int64_t offset, QEMUIOVector *qiov);
+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, BdrvRequestFlags flags);
+BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs,
+ const char *backing_file);
+int bdrv_get_backing_file_depth(BlockDriverState *bs);
+void bdrv_refresh_filename(BlockDriverState *bs);
+int bdrv_truncate(BlockDriverState *bs, int64_t offset);
+int64_t bdrv_nb_sectors(BlockDriverState *bs);
+int64_t bdrv_getlength(BlockDriverState *bs);
+int64_t bdrv_get_allocated_file_size(BlockDriverState *bs);
+void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr);
+void bdrv_refresh_limits(BlockDriverState *bs, Error **errp);
+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);
+int bdrv_drop_intermediate(BlockDriverState *active, BlockDriverState *top,
+ BlockDriverState *base,
+ const char *backing_file_str);
+BlockDriverState *bdrv_find_overlay(BlockDriverState *active,
+ BlockDriverState *bs);
+BlockDriverState *bdrv_find_base(BlockDriverState *bs);
+
+
+typedef struct BdrvCheckResult {
+ int corruptions;
+ int leaks;
+ int check_errors;
+ int corruptions_fixed;
+ int leaks_fixed;
+ int64_t image_end_offset;
+ BlockFragInfo bfi;
+} BdrvCheckResult;
+
+typedef enum {
+ BDRV_FIX_LEAKS = 1,
+ BDRV_FIX_ERRORS = 2,
+} BdrvCheckMode;
+
+int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix);
+
+/* The units of offset and total_work_size may be chosen arbitrarily by the
+ * block driver; total_work_size may change during the course of the amendment
+ * operation */
+typedef void BlockDriverAmendStatusCB(BlockDriverState *bs, int64_t offset,
+ int64_t total_work_size);
+int bdrv_amend_options(BlockDriverState *bs_new, QemuOpts *opts,
+ BlockDriverAmendStatusCB *status_cb);
+
+/* external snapshots */
+bool bdrv_recurse_is_first_non_filter(BlockDriverState *bs,
+ BlockDriverState *candidate);
+bool bdrv_is_first_non_filter(BlockDriverState *candidate);
+
+/* check if a named node can be replaced when doing drive-mirror */
+BlockDriverState *check_to_replace_node(const char *node_name, Error **errp);
+
+/* async block I/O */
+typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector,
+ int sector_num);
+BlockAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num,
+ QEMUIOVector *iov, int nb_sectors,
+ BlockCompletionFunc *cb, void *opaque);
+BlockAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num,
+ QEMUIOVector *iov, int nb_sectors,
+ BlockCompletionFunc *cb, void *opaque);
+BlockAIOCB *bdrv_aio_flush(BlockDriverState *bs,
+ BlockCompletionFunc *cb, void *opaque);
+BlockAIOCB *bdrv_aio_discard(BlockDriverState *bs,
+ int64_t sector_num, int nb_sectors,
+ BlockCompletionFunc *cb, void *opaque);
+void bdrv_aio_cancel(BlockAIOCB *acb);
+void bdrv_aio_cancel_async(BlockAIOCB *acb);
+
+typedef struct BlockRequest {
+ /* Fields to be filled by multiwrite caller */
+ int64_t sector;
+ int nb_sectors;
+ int flags;
+ QEMUIOVector *qiov;
+ BlockCompletionFunc *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);
+BlockAIOCB *bdrv_aio_ioctl(BlockDriverState *bs,
+ unsigned long int req, void *buf,
+ BlockCompletionFunc *cb, void *opaque);
+
+/* Invalidate any cached metadata used by image formats */
+void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp);
+void bdrv_invalidate_cache_all(Error **errp);
+
+/* Ensure contents are flushed to disk. */
+int bdrv_flush(BlockDriverState *bs);
+int coroutine_fn bdrv_co_flush(BlockDriverState *bs);
+int bdrv_flush_all(void);
+void bdrv_close_all(void);
+void bdrv_drain(BlockDriverState *bs);
+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_1(BlockDriverState *bs);
+int bdrv_has_zero_init(BlockDriverState *bs);
+bool bdrv_unallocated_blocks_are_zero(BlockDriverState *bs);
+bool bdrv_can_write_zeroes_with_unmap(BlockDriverState *bs);
+int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num,
+ int nb_sectors, int *pnum);
+int64_t bdrv_get_block_status_above(BlockDriverState *bs,
+ BlockDriverState *base,
+ int64_t sector_num,
+ int nb_sectors, int *pnum);
+int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
+ int *pnum);
+int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base,
+ int64_t sector_num, int nb_sectors, int *pnum);
+
+void bdrv_set_on_error(BlockDriverState *bs, BlockdevOnError on_read_error,
+ BlockdevOnError on_write_error);
+BlockdevOnError bdrv_get_on_error(BlockDriverState *bs, bool is_read);
+BlockErrorAction bdrv_get_error_action(BlockDriverState *bs, bool is_read, int error);
+void bdrv_error_action(BlockDriverState *bs, BlockErrorAction action,
+ bool is_read, int error);
+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_node(const char *node_name);
+BlockDeviceInfoList *bdrv_named_nodes_list(Error **errp);
+BlockDriverState *bdrv_lookup_bs(const char *device,
+ const char *node_name,
+ Error **errp);
+bool bdrv_chain_contains(BlockDriverState *top, BlockDriverState *base);
+BlockDriverState *bdrv_next_node(BlockDriverState *bs);
+BlockDriverState *bdrv_next(BlockDriverState *bs);
+int bdrv_is_encrypted(BlockDriverState *bs);
+int bdrv_key_required(BlockDriverState *bs);
+int bdrv_set_key(BlockDriverState *bs, const char *key);
+void bdrv_add_key(BlockDriverState *bs, const char *key, Error **errp);
+int bdrv_query_missing_keys(void);
+void bdrv_iterate_format(void (*it)(void *opaque, const char *name),
+ void *opaque);
+const char *bdrv_get_node_name(const BlockDriverState *bs);
+const char *bdrv_get_device_name(const BlockDriverState *bs);
+const char *bdrv_get_device_or_node_name(const 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);
+ImageInfoSpecific *bdrv_get_specific_info(BlockDriverState *bs);
+void bdrv_round_to_clusters(BlockDriverState *bs,
+ int64_t sector_num, int nb_sectors,
+ int64_t *cluster_sector_num,
+ int *cluster_nb_sectors);
+
+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, Error **errp);
+void bdrv_get_full_backing_filename_from_filename(const char *backed,
+ const char *backing,
+ char *dest, size_t sz,
+ Error **errp);
+int bdrv_is_snapshot(BlockDriverState *bs);
+
+int path_has_protocol(const char *path);
+int path_is_absolute(const char *path);
+void path_combine(char *dest, int dest_size,
+ const char *base_path,
+ const char *filename);
+
+int bdrv_writev_vmstate(BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos);
+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);
+
+void 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,
+ Error **errp, bool quiet);
+
+/* Returns the alignment in bytes that is required so that no bounce buffer
+ * is required throughout the stack */
+size_t bdrv_min_mem_align(BlockDriverState *bs);
+/* Returns optimal alignment in bytes for bounce buffer */
+size_t bdrv_opt_mem_align(BlockDriverState *bs);
+void bdrv_set_guest_block_size(BlockDriverState *bs, int align);
+void *qemu_blockalign(BlockDriverState *bs, size_t size);
+void *qemu_blockalign0(BlockDriverState *bs, size_t size);
+void *qemu_try_blockalign(BlockDriverState *bs, size_t size);
+void *qemu_try_blockalign0(BlockDriverState *bs, size_t size);
+bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov);
+
+struct HBitmapIter;
+typedef struct BdrvDirtyBitmap BdrvDirtyBitmap;
+BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs,
+ uint32_t granularity,
+ const char *name,
+ Error **errp);
+int bdrv_dirty_bitmap_create_successor(BlockDriverState *bs,
+ BdrvDirtyBitmap *bitmap,
+ Error **errp);
+BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BlockDriverState *bs,
+ BdrvDirtyBitmap *bitmap,
+ Error **errp);
+BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BlockDriverState *bs,
+ BdrvDirtyBitmap *bitmap,
+ Error **errp);
+BdrvDirtyBitmap *bdrv_find_dirty_bitmap(BlockDriverState *bs,
+ const char *name);
+void bdrv_dirty_bitmap_make_anon(BdrvDirtyBitmap *bitmap);
+void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap);
+void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap);
+void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap *bitmap);
+BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs);
+uint32_t bdrv_get_default_bitmap_granularity(BlockDriverState *bs);
+uint32_t bdrv_dirty_bitmap_granularity(BdrvDirtyBitmap *bitmap);
+bool bdrv_dirty_bitmap_enabled(BdrvDirtyBitmap *bitmap);
+bool bdrv_dirty_bitmap_frozen(BdrvDirtyBitmap *bitmap);
+DirtyBitmapStatus bdrv_dirty_bitmap_status(BdrvDirtyBitmap *bitmap);
+int bdrv_get_dirty(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, int64_t sector);
+void bdrv_set_dirty_bitmap(BdrvDirtyBitmap *bitmap,
+ int64_t cur_sector, int nr_sectors);
+void bdrv_reset_dirty_bitmap(BdrvDirtyBitmap *bitmap,
+ int64_t cur_sector, int nr_sectors);
+void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap);
+void bdrv_dirty_iter_init(BdrvDirtyBitmap *bitmap, struct HBitmapIter *hbi);
+void bdrv_set_dirty_iter(struct HBitmapIter *hbi, int64_t offset);
+int64_t bdrv_get_dirty_count(BdrvDirtyBitmap *bitmap);
+
+void bdrv_enable_copy_on_read(BlockDriverState *bs);
+void bdrv_disable_copy_on_read(BlockDriverState *bs);
+
+void bdrv_ref(BlockDriverState *bs);
+void bdrv_unref(BlockDriverState *bs);
+void bdrv_unref_child(BlockDriverState *parent, BdrvChild *child);
+
+bool bdrv_op_is_blocked(BlockDriverState *bs, BlockOpType op, Error **errp);
+void bdrv_op_block(BlockDriverState *bs, BlockOpType op, Error *reason);
+void bdrv_op_unblock(BlockDriverState *bs, BlockOpType op, Error *reason);
+void bdrv_op_block_all(BlockDriverState *bs, Error *reason);
+void bdrv_op_unblock_all(BlockDriverState *bs, Error *reason);
+bool bdrv_op_blocker_is_empty(BlockDriverState *bs);
+
+typedef enum {
+ BLKDBG_L1_UPDATE,
+
+ BLKDBG_L1_GROW_ALLOC_TABLE,
+ BLKDBG_L1_GROW_WRITE_TABLE,
+ BLKDBG_L1_GROW_ACTIVATE_TABLE,
+
+ BLKDBG_L2_LOAD,
+ BLKDBG_L2_UPDATE,
+ BLKDBG_L2_UPDATE_COMPRESSED,
+ BLKDBG_L2_ALLOC_COW_READ,
+ BLKDBG_L2_ALLOC_WRITE,
+
+ BLKDBG_READ_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_REFTABLE_UPDATE,
+
+ 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_FLUSH_TO_OS,
+ BLKDBG_FLUSH_TO_DISK,
+
+ BLKDBG_PWRITEV_RMW_HEAD,
+ BLKDBG_PWRITEV_RMW_AFTER_HEAD,
+ BLKDBG_PWRITEV_RMW_TAIL,
+ BLKDBG_PWRITEV_RMW_AFTER_TAIL,
+ BLKDBG_PWRITEV,
+ BLKDBG_PWRITEV_ZERO,
+ BLKDBG_PWRITEV_DONE,
+
+ BLKDBG_EMPTY_IMAGE_PREPARE,
+
+ BLKDBG_EVENT_MAX,
+} BlkDebugEvent;
+
+#define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt)
+void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event);
+
+int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event,
+ const char *tag);
+int bdrv_debug_remove_breakpoint(BlockDriverState *bs, const char *tag);
+int bdrv_debug_resume(BlockDriverState *bs, const char *tag);
+bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag);
+
+/**
+ * bdrv_get_aio_context:
+ *
+ * Returns: the currently bound #AioContext
+ */
+AioContext *bdrv_get_aio_context(BlockDriverState *bs);
+
+/**
+ * bdrv_set_aio_context:
+ *
+ * Changes the #AioContext used for fd handlers, timers, and BHs by this
+ * BlockDriverState and all its children.
+ *
+ * This function must be called with iothread lock held.
+ */
+void bdrv_set_aio_context(BlockDriverState *bs, AioContext *new_context);
+int bdrv_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz);
+int bdrv_probe_geometry(BlockDriverState *bs, HDGeometry *geo);
+
+void bdrv_io_plug(BlockDriverState *bs);
+void bdrv_io_unplug(BlockDriverState *bs);
+void bdrv_flush_io_queue(BlockDriverState *bs);
+
+BlockAcctStats *bdrv_get_stats(BlockDriverState *bs);
+
+#endif
Code Review / kvmfornfv.git / blobdiff