diff options
Diffstat (limited to 'filesystem/vbmeta.go')
| -rw-r--r-- | filesystem/vbmeta.go | 70 |
1 files changed, 66 insertions, 4 deletions
diff --git a/filesystem/vbmeta.go b/filesystem/vbmeta.go index 01b453e25..e7a39bef7 100644 --- a/filesystem/vbmeta.go +++ b/filesystem/vbmeta.go @@ -16,7 +16,10 @@ package filesystem import ( "fmt" + "sort" "strconv" + "strings" + "time" "github.com/google/blueprint" "github.com/google/blueprint/proptools" @@ -52,6 +55,10 @@ type VbmetaProperties struct { // Name of the partition stored in vbmeta desc. Defaults to the name of this module. Partition_name *string + // Type of the `android_filesystem` for which the vbmeta.img is created. + // Examples are system, vendor, product. + Filesystem_partition_type *string + // Set the name of the output. Defaults to <module_name>.img. Stem *string @@ -115,6 +122,9 @@ type vbmetaPartitionInfo struct { // Name of the partition Name string + // Partition type of the correspdonding android_filesystem. + FilesystemPartitionType string + // Rollback index location, non-negative int RollbackIndexLocation int @@ -124,6 +134,10 @@ type vbmetaPartitionInfo struct { // The output of the vbmeta module Output android.Path + + // Information about the vbmeta partition that will be added to misc_info.txt + // created by android_device + PropFileForMiscInfo android.Path } var vbmetaPartitionProvider = blueprint.NewProvider[vbmetaPartitionInfo]() @@ -298,10 +312,12 @@ func (v *vbmeta) GenerateAndroidBuildActions(ctx android.ModuleContext) { }) android.SetProvider(ctx, vbmetaPartitionProvider, vbmetaPartitionInfo{ - Name: v.partitionName(), - RollbackIndexLocation: ril, - PublicKey: extractedPublicKey, - Output: output, + Name: v.partitionName(), + FilesystemPartitionType: proptools.String(v.properties.Filesystem_partition_type), + RollbackIndexLocation: ril, + PublicKey: extractedPublicKey, + Output: output, + PropFileForMiscInfo: v.buildPropFileForMiscInfo(ctx), }) ctx.SetOutputFiles([]android.Path{output}, "") @@ -310,6 +326,41 @@ func (v *vbmeta) GenerateAndroidBuildActions(ctx android.ModuleContext) { setCommonFilesystemInfo(ctx, v) } +func (v *vbmeta) buildPropFileForMiscInfo(ctx android.ModuleContext) android.Path { + var lines []string + addStr := func(name string, value string) { + lines = append(lines, fmt.Sprintf("%s=%s", name, value)) + } + + addStr(fmt.Sprintf("avb_%s_algorithm", v.partitionName()), proptools.StringDefault(v.properties.Algorithm, "SHA256_RSA4096")) + if v.properties.Private_key != nil { + addStr(fmt.Sprintf("avb_%s_key_path", v.partitionName()), android.PathForModuleSrc(ctx, proptools.String(v.properties.Private_key)).String()) + } + if v.properties.Rollback_index_location != nil { + addStr(fmt.Sprintf("avb_%s_rollback_index_location", v.partitionName()), strconv.FormatInt(*v.properties.Rollback_index_location, 10)) + } + + var partitionDepNames []string + ctx.VisitDirectDepsProxyWithTag(vbmetaPartitionDep, func(child android.ModuleProxy) { + if info, ok := android.OtherModuleProvider(ctx, child, vbmetaPartitionProvider); ok { + partitionDepNames = append(partitionDepNames, info.Name) + } else { + ctx.ModuleErrorf("vbmeta dep %s does not set vbmetaPartitionProvider\n", child) + } + }) + if v.partitionName() != "vbmeta" { // skip for vbmeta to match Make's misc_info.txt + addStr(fmt.Sprintf("avb_%s", v.partitionName()), strings.Join(android.SortedUniqueStrings(partitionDepNames), " ")) + } + + addStr(fmt.Sprintf("avb_%s_args", v.partitionName()), fmt.Sprintf("--padding_size 4096 --rollback_index %s", v.rollbackIndexString(ctx))) + + sort.Strings(lines) + + propFile := android.PathForModuleOut(ctx, "prop_file_for_misc_info") + android.WriteFileRule(ctx, propFile, strings.Join(lines, "\n")) + return propFile +} + // Returns the embedded shell command that prints the rollback index func (v *vbmeta) rollbackIndexCommand(ctx android.ModuleContext) string { if v.properties.Rollback_index != nil { @@ -320,6 +371,17 @@ func (v *vbmeta) rollbackIndexCommand(ctx android.ModuleContext) string { } } +// Similar to rollbackIndexCommand, but guarantees that the rollback index is +// always computed during Soong analysis, even if v.properties.Rollback_index is nil +func (v *vbmeta) rollbackIndexString(ctx android.ModuleContext) string { + if v.properties.Rollback_index != nil { + return fmt.Sprintf("%d", *v.properties.Rollback_index) + } else { + t, _ := time.Parse(time.DateOnly, ctx.Config().PlatformSecurityPatch()) + return fmt.Sprintf("%d", t.Unix()) + } +} + var _ android.AndroidMkProviderInfoProducer = (*vbmeta)(nil) func (v *vbmeta) PrepareAndroidMKProviderInfo(config android.Config) *android.AndroidMkProviderInfo { |