update_engine: Refactor payload generation request args in a class.
This patch introduces a new struct PayloadGenerationConfig encapsulating
the payload generation request performed by the user in the command
line.
Since we have several payload generation strategies that are triggered
based on the source image version and if there is an image version at
all, encapsulating the request in a single struct helps splitting the
different strategies in independent classes and pass the payload
generation configuration struct with the request to those classes.
BUG=chromium:430950
TEST=FEATURES=test emerge-link update_engine
Change-Id: Ie960c6510bf02d8e10f5e1adaa847a2048c59598
Reviewed-on: https://chromium-review.googlesource.com/258520
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
Tested-by: Alex Deymo <deymo@chromium.org>
Commit-Queue: Alex Deymo <deymo@chromium.org>
diff --git a/payload_generator/inplace_generator.h b/payload_generator/inplace_generator.h
index 73a791b..a120196 100644
--- a/payload_generator/inplace_generator.h
+++ b/payload_generator/inplace_generator.h
@@ -18,6 +18,22 @@
namespace chromeos_update_engine {
+// This struct stores all relevant info for an edge that is cut between
+// nodes old_src -> old_dst by creating new vertex new_vertex. The new
+// relationship is:
+// old_src -(read before)-> new_vertex <-(write before)- old_dst
+// new_vertex is a MOVE operation that moves some existing blocks into
+// temp space. The temp extents are, by necessity, stored in new_vertex
+// (as dst extents) and old_dst (as src extents), but they are also broken
+// out into tmp_extents, as the nodes themselves may contain many more
+// extents.
+struct CutEdgeVertexes {
+ Vertex::Index new_vertex;
+ Vertex::Index old_src;
+ Vertex::Index old_dst;
+ std::vector<Extent> tmp_extents;
+};
+
class InplaceGenerator {
public:
// Modifies blocks read by 'op' so that any blocks referred to by