Merge "Truncate vbmeta to 64KB" (ccaf57c6) · Commits · e / os / android_build_soong

filesystem/vbmeta.go

+10 −0

Original line number	Diff line number	Diff line
		@@ -110,6 +110,9 @@ func (v *vbmeta) partitionName() string {
		return proptools.StringDefault(v.properties.Partition_name, v.BaseModuleName())
		}

		// See external/avb/libavb/avb_slot_verify.c#VBMETA_MAX_SIZE
		const vbmetaMaxSize = 64 * 1024

		func (v *vbmeta) GenerateAndroidBuildActions(ctx android.ModuleContext) {
		extractedPublicKeys := v.extractPublicKeys(ctx)

		@@ -172,6 +175,13 @@ func (v *vbmeta) GenerateAndroidBuildActions(ctx android.ModuleContext) {
		}

		cmd.FlagWithOutput("--output ", v.output)

		// libavb expects to be able to read the maximum vbmeta size, so we must provide a partition
		// which matches this or the read will fail.
		builder.Command().Text("truncate").
		FlagWithArg("-s ", strconv.Itoa(vbmetaMaxSize)).
		Output(v.output)

		builder.Build("vbmeta", fmt.Sprintf("vbmeta %s", ctx.ModuleName()))

		v.installDir = android.PathForModuleInstall(ctx, "etc")