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author | Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> | 2017-06-28 15:05:17 +0300 |
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committer | Max Reitz <mreitz@redhat.com> | 2017-07-11 17:44:58 +0200 |
commit | a88b179fdbc68e00ae5eacd49e1bccad32440b5a (patch) | |
tree | 26f08a49e53fd1fea8d087b1eacdd8b771c58c6e /block/dirty-bitmap.c | |
parent | cca43ae1e1a5e2faf42d2db778edc8e76e10dc47 (diff) | |
download | qemu-a88b179fdbc68e00ae5eacd49e1bccad32440b5a.zip qemu-a88b179fdbc68e00ae5eacd49e1bccad32440b5a.tar.gz qemu-a88b179fdbc68e00ae5eacd49e1bccad32440b5a.tar.bz2 |
block: introduce persistent dirty bitmaps
New field BdrvDirtyBitmap.persistent means, that bitmap should be saved
by format driver in .bdrv_close and .bdrv_inactivate. No format driver
supports it for now.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20170628120530.31251-18-vsementsov@virtuozzo.com
[mreitz: Fixed indentation]
Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'block/dirty-bitmap.c')
-rw-r--r-- | block/dirty-bitmap.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c index 06dc7a3..3c17c45 100644 --- a/block/dirty-bitmap.c +++ b/block/dirty-bitmap.c @@ -54,6 +54,7 @@ struct BdrvDirtyBitmap { this flag is set. */ bool autoload; /* For persistent bitmaps: bitmap must be autoloaded on image opening */ + bool persistent; /* bitmap must be saved to owner disk image */ QLIST_ENTRY(BdrvDirtyBitmap) list; }; @@ -102,6 +103,7 @@ void bdrv_dirty_bitmap_make_anon(BdrvDirtyBitmap *bitmap) assert(!bdrv_dirty_bitmap_frozen(bitmap)); g_free(bitmap->name); bitmap->name = NULL; + bitmap->persistent = false; bitmap->autoload = false; } @@ -299,6 +301,8 @@ BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BlockDriverState *bs, bitmap->name = NULL; successor->name = name; bitmap->successor = NULL; + successor->persistent = bitmap->persistent; + bitmap->persistent = false; successor->autoload = bitmap->autoload; bitmap->autoload = false; bdrv_release_dirty_bitmap(bs, bitmap); @@ -689,3 +693,28 @@ bool bdrv_dirty_bitmap_get_autoload(const BdrvDirtyBitmap *bitmap) { return bitmap->autoload; } + +/* Called with BQL taken. */ +void bdrv_dirty_bitmap_set_persistance(BdrvDirtyBitmap *bitmap, bool persistent) +{ + qemu_mutex_lock(bitmap->mutex); + bitmap->persistent = persistent; + qemu_mutex_unlock(bitmap->mutex); +} + +bool bdrv_dirty_bitmap_get_persistance(BdrvDirtyBitmap *bitmap) +{ + return bitmap->persistent; +} + +bool bdrv_has_changed_persistent_bitmaps(BlockDriverState *bs) +{ + BdrvDirtyBitmap *bm; + QLIST_FOREACH(bm, &bs->dirty_bitmaps, list) { + if (bm->persistent && !bm->readonly) { + return true; + } + } + + return false; +} |