Handle resume of VABC updates by emitting labels
To support resuming an update with Virtual AB Compression, we emit
labels in between operations. After writing all SOURCE_COPY, we
emit label 0. Each time we finished writing an InstallOp, we emit
a label incremented by 1. When resuming, we pass the label to CowWriter.
Test: treehugger
1. update_device.py ota.zip
--extra-headers="SWITCH_SLOT_ON_REBOOT=0"
2. update_device.py ota.zip
3. Verify that 2 did not re-start the entire update,
only fs verification and postinstall may re-run.
Change-Id: I785cd04a35457181621ed7b8c0be9a46b6004b7b
diff --git a/payload_consumer/file_descriptor.cc b/payload_consumer/file_descriptor.cc
index 5b27c38..7c69c1b 100644
--- a/payload_consumer/file_descriptor.cc
+++ b/payload_consumer/file_descriptor.cc
@@ -134,6 +134,7 @@
CHECK_GE(fd_, 0);
// Implemented as a No-Op, as delta_performer typically uses |O_DSYNC|, except
// in interactive settings.
+ fsync(fd_);
return true;
}