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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 /blockdev.c
parentd58d84539784d27c826924a79d9436178b07ff69 (diff)
downloadhqemu-e74e6b78e6fe0c9ee426d1278fff45f5fa0af766.zip
hqemu-e74e6b78e6fe0c9ee426d1278fff45f5fa0af766.tar.gz
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 'blockdev.c')
-rw-r--r--blockdev.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/blockdev.c b/blockdev.c
index 62d862c..5905946 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -2079,6 +2079,40 @@ void qmp_block_dirty_bitmap_remove(const char *node, const char *name,
aio_context_release(aio_context);
}
+/**
+ * Completely clear a bitmap, for the purposes of synchronizing a bitmap
+ * immediately after a full backup operation.
+ */
+void qmp_block_dirty_bitmap_clear(const char *node, const char *name,
+ Error **errp)
+{
+ AioContext *aio_context;
+ BdrvDirtyBitmap *bitmap;
+ BlockDriverState *bs;
+
+ bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp);
+ if (!bitmap || !bs) {
+ return;
+ }
+
+ if (bdrv_dirty_bitmap_frozen(bitmap)) {
+ error_setg(errp,
+ "Bitmap '%s' is currently frozen and cannot be modified",
+ name);
+ goto out;
+ } else if (!bdrv_dirty_bitmap_enabled(bitmap)) {
+ error_setg(errp,
+ "Bitmap '%s' is currently disabled and cannot be cleared",
+ name);
+ goto out;
+ }
+
+ bdrv_clear_dirty_bitmap(bitmap);
+
+ out:
+ aio_context_release(aio_context);
+}
+
int hmp_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
{
const char *id = qdict_get_str(qdict, "id");
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