Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 121 insertions, 0 deletions

diff --git a/include/block/dirty-bitmap.h b/include/block/dirty-bitmap.h
new file mode 100644
index 000000000..40950ae3d
--- /dev/null
+++ b/include/block/dirty-bitmap.h
@@ -0,0 +1,121 @@
+#ifndef BLOCK_DIRTY_BITMAP_H
+#define BLOCK_DIRTY_BITMAP_H
+
+#include "qapi/qapi-types-block-core.h"
+#include "qemu/hbitmap.h"
+
+typedef enum BitmapCheckFlags {
+    BDRV_BITMAP_BUSY = 1,
+    BDRV_BITMAP_RO = 2,
+    BDRV_BITMAP_INCONSISTENT = 4,
+} BitmapCheckFlags;
+
+#define BDRV_BITMAP_DEFAULT (BDRV_BITMAP_BUSY | BDRV_BITMAP_RO |        \
+                             BDRV_BITMAP_INCONSISTENT)
+#define BDRV_BITMAP_ALLOW_RO (BDRV_BITMAP_BUSY | BDRV_BITMAP_INCONSISTENT)
+
+#define BDRV_BITMAP_MAX_NAME_SIZE 1023
+
+bool bdrv_supports_persistent_dirty_bitmap(BlockDriverState *bs);
+BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs,
+                                          uint32_t granularity,
+                                          const char *name,
+                                          Error **errp);
+int bdrv_dirty_bitmap_create_successor(BdrvDirtyBitmap *bitmap,
+                                       Error **errp);
+BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BdrvDirtyBitmap *bitmap,
+                                            Error **errp);
+BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BdrvDirtyBitmap *bitmap,
+                                           Error **errp);
+void bdrv_dirty_bitmap_enable_successor(BdrvDirtyBitmap *bitmap);
+BdrvDirtyBitmap *bdrv_find_dirty_bitmap(BlockDriverState *bs,
+                                        const char *name);
+int bdrv_dirty_bitmap_check(const BdrvDirtyBitmap *bitmap, uint32_t flags,
+                            Error **errp);
+void bdrv_release_dirty_bitmap(BdrvDirtyBitmap *bitmap);
+void bdrv_release_named_dirty_bitmaps(BlockDriverState *bs);
+int bdrv_remove_persistent_dirty_bitmap(BlockDriverState *bs, const char *name,
+                                        Error **errp);
+void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap);
+void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap *bitmap);
+void bdrv_enable_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap);
+BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs);
+uint32_t bdrv_get_default_bitmap_granularity(BlockDriverState *bs);
+uint32_t bdrv_dirty_bitmap_granularity(const BdrvDirtyBitmap *bitmap);
+bool bdrv_dirty_bitmap_enabled(BdrvDirtyBitmap *bitmap);
+bool bdrv_dirty_bitmap_has_successor(BdrvDirtyBitmap *bitmap);
+const char *bdrv_dirty_bitmap_name(const BdrvDirtyBitmap *bitmap);
+int64_t bdrv_dirty_bitmap_size(const BdrvDirtyBitmap *bitmap);
+void bdrv_set_dirty_bitmap(BdrvDirtyBitmap *bitmap,
+                           int64_t offset, int64_t bytes);
+void bdrv_reset_dirty_bitmap(BdrvDirtyBitmap *bitmap,
+                             int64_t offset, int64_t bytes);
+BdrvDirtyBitmapIter *bdrv_dirty_iter_new(BdrvDirtyBitmap *bitmap);
+void bdrv_dirty_iter_free(BdrvDirtyBitmapIter *iter);
+
+uint64_t bdrv_dirty_bitmap_serialization_size(const BdrvDirtyBitmap *bitmap,
+                                              uint64_t offset, uint64_t bytes);
+uint64_t bdrv_dirty_bitmap_serialization_align(const BdrvDirtyBitmap *bitmap);
+uint64_t bdrv_dirty_bitmap_serialization_coverage(int serialized_chunk_size,
+        const BdrvDirtyBitmap *bitmap);
+void bdrv_dirty_bitmap_serialize_part(const BdrvDirtyBitmap *bitmap,
+                                      uint8_t *buf, uint64_t offset,
+                                      uint64_t bytes);
+void bdrv_dirty_bitmap_deserialize_part(BdrvDirtyBitmap *bitmap,
+                                        uint8_t *buf, uint64_t offset,
+                                        uint64_t bytes, bool finish);
+void bdrv_dirty_bitmap_deserialize_zeroes(BdrvDirtyBitmap *bitmap,
+                                          uint64_t offset, uint64_t bytes,
+                                          bool finish);
+void bdrv_dirty_bitmap_deserialize_ones(BdrvDirtyBitmap *bitmap,
+                                        uint64_t offset, uint64_t bytes,
+                                        bool finish);
+void bdrv_dirty_bitmap_deserialize_finish(BdrvDirtyBitmap *bitmap);
+
+void bdrv_dirty_bitmap_set_readonly(BdrvDirtyBitmap *bitmap, bool value);
+void bdrv_dirty_bitmap_set_persistence(BdrvDirtyBitmap *bitmap,
+                                       bool persistent);
+void bdrv_dirty_bitmap_set_inconsistent(BdrvDirtyBitmap *bitmap);
+void bdrv_dirty_bitmap_set_busy(BdrvDirtyBitmap *bitmap, bool busy);
+void bdrv_merge_dirty_bitmap(BdrvDirtyBitmap *dest, const BdrvDirtyBitmap *src,
+                             HBitmap **backup, Error **errp);
+void bdrv_dirty_bitmap_skip_store(BdrvDirtyBitmap *bitmap, bool skip);
+bool bdrv_dirty_bitmap_get(BdrvDirtyBitmap *bitmap, int64_t offset);
+
+/* Functions that require manual locking.  */
+void bdrv_dirty_bitmap_lock(BdrvDirtyBitmap *bitmap);
+void bdrv_dirty_bitmap_unlock(BdrvDirtyBitmap *bitmap);
+bool bdrv_dirty_bitmap_get_locked(BdrvDirtyBitmap *bitmap, int64_t offset);
+void bdrv_set_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap,
+                                  int64_t offset, int64_t bytes);
+void bdrv_reset_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap,
+                                    int64_t offset, int64_t bytes);
+int64_t bdrv_dirty_iter_next(BdrvDirtyBitmapIter *iter);
+void bdrv_set_dirty_iter(BdrvDirtyBitmapIter *hbi, int64_t offset);
+int64_t bdrv_get_dirty_count(BdrvDirtyBitmap *bitmap);
+void bdrv_dirty_bitmap_truncate(BlockDriverState *bs, int64_t bytes);
+bool bdrv_dirty_bitmap_readonly(const BdrvDirtyBitmap *bitmap);
+bool bdrv_has_readonly_bitmaps(BlockDriverState *bs);
+bool bdrv_has_named_bitmaps(BlockDriverState *bs);
+bool bdrv_dirty_bitmap_get_autoload(const BdrvDirtyBitmap *bitmap);
+bool bdrv_dirty_bitmap_get_persistence(BdrvDirtyBitmap *bitmap);
+bool bdrv_dirty_bitmap_inconsistent(const BdrvDirtyBitmap *bitmap);
+
+BdrvDirtyBitmap *bdrv_dirty_bitmap_first(BlockDriverState *bs);
+BdrvDirtyBitmap *bdrv_dirty_bitmap_next(BdrvDirtyBitmap *bitmap);
+#define FOR_EACH_DIRTY_BITMAP(bs, bitmap) \
+for (bitmap = bdrv_dirty_bitmap_first(bs); bitmap; \
+     bitmap = bdrv_dirty_bitmap_next(bitmap))
+
+char *bdrv_dirty_bitmap_sha256(const BdrvDirtyBitmap *bitmap, Error **errp);
+int64_t bdrv_dirty_bitmap_next_dirty(BdrvDirtyBitmap *bitmap, int64_t offset,
+                                     int64_t bytes);
+int64_t bdrv_dirty_bitmap_next_zero(BdrvDirtyBitmap *bitmap, int64_t offset,
+                                    int64_t bytes);
+bool bdrv_dirty_bitmap_next_dirty_area(BdrvDirtyBitmap *bitmap,
+        int64_t start, int64_t end, int64_t max_dirty_count,
+        int64_t *dirty_start, int64_t *dirty_count);
+BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap,
+                                                  Error **errp);
+
+#endif