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authorJohn Snow <jsnow@redhat.com>2015-04-17 19:49:58 -0400
committerKevin Wolf <kwolf@redhat.com>2015-04-28 15:36:10 +0200
commitd58d84539784d27c826924a79d9436178b07ff69 (patch)
treedfc10d7edcb62f28355eab4d7b6ab3eb9bc0bca6 /block.c
parent9bd2b08f27b9c27bb40d73b6466321b8c635086e (diff)
qmp: Add support of "dirty-bitmap" sync mode for drive-backup
For "dirty-bitmap" sync mode, the block job will iterate through the given dirty bitmap to decide if a sector needs backup (backup all the dirty clusters and skip clean ones), just as allocation conditions of "top" sync mode. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1429314609-29776-11-git-send-email-jsnow@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block.c')
-rw-r--r--block.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/block.c b/block.c
index dffa9dedc0..9dc5c8cb1a 100644
--- a/block.c
+++ b/block.c
@@ -5783,6 +5783,15 @@ static void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector,
}
}
+/**
+ * Advance an HBitmapIter to an arbitrary offset.
+ */
+void bdrv_set_dirty_iter(HBitmapIter *hbi, int64_t offset)
+{
+ assert(hbi->hb);
+ hbitmap_iter_init(hbi, hbi->hb, offset);
+}
+
int64_t bdrv_get_dirty_count(BlockDriverState *bs, BdrvDirtyBitmap *bitmap)
{
return hbitmap_count(bitmap->bitmap);