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block/dirty-bitmap: add autoload field to BdrvDirtyBitmap

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Mirror AUTO flag from Qcow2 bitmap in BdrvDirtyBitmap. This will be
needed in future, to save this flag back to Qcow2 for persistent
bitmaps.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20170628120530.31251-16-vsementsov@virtuozzo.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2017-06-28 15:05:15 +03:00 committed by Max Reitz
parent 1b6b0562db
commit a0319aacd4
3 changed files with 22 additions and 0 deletions
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18
block/dirty-bitmap.c
View File

@ -52,6 +52,8 @@ struct BdrvDirtyBitmap {
Such operations must fail and both the image
and this bitmap must remain unchanged while
this flag is set. */
bool autoload; /* For persistent bitmaps: bitmap must be
autoloaded on image opening */
QLIST_ENTRY(BdrvDirtyBitmap) list;
};
@ -100,6 +102,7 @@ void bdrv_dirty_bitmap_make_anon(BdrvDirtyBitmap *bitmap)
assert(!bdrv_dirty_bitmap_frozen(bitmap));
g_free(bitmap->name);
bitmap->name = NULL;
bitmap->autoload = false;
}
/* Called with BQL taken. */
@ -296,6 +299,8 @@ BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BlockDriverState *bs,
bitmap->name = NULL;
successor->name = name;
bitmap->successor = NULL;
successor->autoload = bitmap->autoload;
bitmap->autoload = false;
bdrv_release_dirty_bitmap(bs, bitmap);
return successor;
@ -671,3 +676,16 @@ bool bdrv_has_readonly_bitmaps(BlockDriverState *bs)
return false;
}
/* Called with BQL taken. */
void bdrv_dirty_bitmap_set_autoload(BdrvDirtyBitmap *bitmap, bool autoload)
{
qemu_mutex_lock(bitmap->mutex);
bitmap->autoload = autoload;
qemu_mutex_unlock(bitmap->mutex);
}
bool bdrv_dirty_bitmap_get_autoload(const BdrvDirtyBitmap *bitmap)
{
return bitmap->autoload;
}

2
block/qcow2-bitmap.c
View File

@ -793,6 +793,8 @@ bool qcow2_load_autoloading_dirty_bitmaps(BlockDriverState *bs, Error **errp)
if (bitmap == NULL) {
goto fail;
}
bdrv_dirty_bitmap_set_autoload(bitmap, true);
bm->flags |= BME_FLAG_IN_USE;
created_dirty_bitmaps =
g_slist_append(created_dirty_bitmaps, bitmap);

2
include/block/dirty-bitmap.h
View File

@ -72,6 +72,7 @@ void bdrv_dirty_bitmap_deserialize_ones(BdrvDirtyBitmap *bitmap,
void bdrv_dirty_bitmap_deserialize_finish(BdrvDirtyBitmap *bitmap);
void bdrv_dirty_bitmap_set_readonly(BdrvDirtyBitmap *bitmap, bool value);
void bdrv_dirty_bitmap_set_autoload(BdrvDirtyBitmap *bitmap, bool autoload);
/* Functions that require manual locking. */
void bdrv_dirty_bitmap_lock(BdrvDirtyBitmap *bitmap);
@ -89,5 +90,6 @@ int64_t bdrv_get_meta_dirty_count(BdrvDirtyBitmap *bitmap);
void bdrv_dirty_bitmap_truncate(BlockDriverState *bs);
bool bdrv_dirty_bitmap_readonly(const BdrvDirtyBitmap *bitmap);
bool bdrv_has_readonly_bitmaps(BlockDriverState *bs);
bool bdrv_dirty_bitmap_get_autoload(const BdrvDirtyBitmap *bitmap);
#endif