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authorJohn Snow <jsnow@redhat.com>2015-04-17 19:49:59 -0400
committerKevin Wolf <kwolf@redhat.com>2015-04-28 15:36:10 +0200
commite74e6b78e6fe0c9ee426d1278fff45f5fa0af766 (patch)
tree7e076da8b90218a37041d5ec59bc3c747abd7a7b /block.c
parentd58d84539784d27c826924a79d9436178b07ff69 (diff)
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qmp: add block-dirty-bitmap-clear
Add bdrv_clear_dirty_bitmap and a matching QMP command, qmp_block_dirty_bitmap_clear that enables a user to reset the bitmap attached to a drive. This allows us to reset a bitmap in the event of a full drive backup. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 1429314609-29776-12-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.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/block.c b/block.c
index 9dc5c8c..b7f1f00 100644
--- a/block.c
+++ b/block.c
@@ -63,6 +63,7 @@
struct BdrvDirtyBitmap {
HBitmap *bitmap;
BdrvDirtyBitmap *successor;
+ int64_t size;
char *name;
bool disabled;
QLIST_ENTRY(BdrvDirtyBitmap) list;
@@ -5557,6 +5558,7 @@ BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs,
}
bitmap = g_new0(BdrvDirtyBitmap, 1);
bitmap->bitmap = hbitmap_alloc(bitmap_size, ctz32(sector_granularity));
+ bitmap->size = bitmap_size;
bitmap->name = g_strdup(name);
bitmap->disabled = false;
QLIST_INSERT_HEAD(&bs->dirty_bitmaps, bitmap, list);
@@ -5759,6 +5761,12 @@ void bdrv_reset_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap,
hbitmap_reset(bitmap->bitmap, cur_sector, nr_sectors);
}
+void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap)
+{
+ assert(bdrv_dirty_bitmap_enabled(bitmap));
+ hbitmap_reset(bitmap->bitmap, 0, bitmap->size);
+}
+
static void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector,
int nr_sectors)
{