Merge "aconfig: read from new storage in Rust codegen" into main
diff --git a/core/board_config.mk b/core/board_config.mk
index 4424517..633303f 100644
--- a/core/board_config.mk
+++ b/core/board_config.mk
@@ -992,7 +992,7 @@
 # BOARD_API_LEVEL for vendor API surface
 ifdef RELEASE_BOARD_API_LEVEL
   ifdef BOARD_API_LEVEL
-    $(error BOARD_API_LEVEL must not set manully. The build system automatically sets this value.)
+    $(error BOARD_API_LEVEL must not be set manually. The build system automatically sets this value.)
   endif
   BOARD_API_LEVEL := $(RELEASE_BOARD_API_LEVEL)
   .KATI_READONLY := BOARD_API_LEVEL
diff --git a/core/release_config.mk b/core/release_config.mk
index a7b5b3f..3e51af5 100644
--- a/core/release_config.mk
+++ b/core/release_config.mk
@@ -41,8 +41,7 @@
 # which has OWNERS control.  If it isn't let others define their own.
 # TODO: Remove wildcard for build/release one when all branch manifests
 # have updated.
-config_map_files := $(wildcard build/trunk_release/release_config_map.mk) \
-    $(wildcard build/release/release_config_map.mk) \
+config_map_files := $(wildcard build/release/release_config_map.mk) \
     $(wildcard vendor/google_shared/build/release/release_config_map.mk) \
     $(if $(wildcard vendor/google/release/release_config_map.mk), \
         vendor/google/release/release_config_map.mk, \
diff --git a/core/tasks/meta-lic.mk b/core/tasks/meta-lic.mk
index dea4892..0348844 100644
--- a/core/tasks/meta-lic.mk
+++ b/core/tasks/meta-lic.mk
@@ -14,6 +14,9 @@
 
 # Declare license metadata for non-module files released with products.
 
+# Moved here from device/sample/Android.mk
+$(eval $(call declare-1p-copy-files,device/sample,))
+
 # Moved here from frameworks/av/media/Android.mk
 $(eval $(call declare-1p-copy-files,frameworks/av/media/libeffects,audio_effects.conf))
 $(eval $(call declare-1p-copy-files,frameworks/av/media/libeffects,audio_effects.xml))
diff --git a/target/product/base_system.mk b/target/product/base_system.mk
index cbd34b2..de5f25f 100644
--- a/target/product/base_system.mk
+++ b/target/product/base_system.mk
@@ -334,7 +334,8 @@
 # Check if the build supports Profiling module
 ifeq ($(RELEASE_PACKAGE_PROFILING_MODULE),true)
     PRODUCT_PACKAGES += \
-       com.android.profiling
+       com.android.profiling \
+       trace_redactor
 endif
 
 ifeq ($(RELEASE_USE_WEBVIEW_BOOTSTRAP_MODULE),true)
diff --git a/tools/aconfig/TEST_MAPPING b/tools/aconfig/TEST_MAPPING
index 0ea8fea..7651dba 100644
--- a/tools/aconfig/TEST_MAPPING
+++ b/tools/aconfig/TEST_MAPPING
@@ -20,7 +20,7 @@
       // aconfig C++ integration tests (test mode auto-generated code)
       "name": "aconfig.test.cpp.test_mode"
     },
-    // TODO(327420679): Enable export mode for native flag library
+    // TODO(b/327420679): Enable export mode for native flag library
     // {
     //   // aconfig C++ integration tests (exported mode auto-generated code)
     //   "name": "aconfig.test.cpp.exported_mode"
@@ -33,7 +33,7 @@
       // aconfig Rust integration tests (test mode auto-generated code)
       "name": "aconfig.test_mode.test.rust"
     },
-    // TODO(327420679): Enable export mode for native flag library
+    // TODO(b/327420679): Enable export mode for native flag library
     // {
     //   // aconfig Rust integration tests (exported mode auto-generated code)
     //   "name": "aconfig.exported_mode.test.rust"
diff --git a/tools/aconfig/aconfig/src/storage/flag_table.rs b/tools/aconfig/aconfig/src/storage/flag_table.rs
index d4f4bc2..a07f179 100644
--- a/tools/aconfig/aconfig/src/storage/flag_table.rs
+++ b/tools/aconfig/aconfig/src/storage/flag_table.rs
@@ -16,8 +16,10 @@
 
 use crate::commands::assign_flag_ids;
 use crate::storage::FlagPackage;
+use aconfig_protos::ProtoFlagPermission;
 use aconfig_storage_file::{
-    get_table_size, FlagTable, FlagTableHeader, FlagTableNode, StorageFileType, FILE_VERSION,
+    get_table_size, FlagTable, FlagTableHeader, FlagTableNode, StorageFileType, StoredFlagType,
+    FILE_VERSION,
 };
 use anyhow::{anyhow, Result};
 
@@ -45,7 +47,7 @@
     fn new(
         package_id: u32,
         flag_name: &str,
-        flag_type: u16,
+        flag_type: StoredFlagType,
         flag_id: u16,
         num_buckets: u32,
     ) -> Self {
@@ -70,11 +72,14 @@
                 let fid = flag_ids
                     .get(pf.name())
                     .ok_or(anyhow!(format!("missing flag id for {}", pf.name())))?;
-                // all flags are boolean value at the moment, thus using the last bit.
-                // When more flag value types are supported, flag value type information
-                // should come from the parsed flag, and we will set the flag_type bit
-                // mask properly.
-                let flag_type = 1;
+                let flag_type = if pf.is_fixed_read_only() {
+                    StoredFlagType::FixedReadOnlyBoolean
+                } else {
+                    match pf.permission() {
+                        ProtoFlagPermission::READ_WRITE => StoredFlagType::ReadWriteBoolean,
+                        ProtoFlagPermission::READ_ONLY => StoredFlagType::ReadOnlyBoolean,
+                    }
+                };
                 Ok(Self::new(package.package_id, pf.name(), flag_type, *fid, num_buckets))
             })
             .collect::<Result<Vec<_>>>()
@@ -95,10 +100,10 @@
         .concat();
 
     // initialize all header fields
-    header.bucket_offset = header.as_bytes().len() as u32;
+    header.bucket_offset = header.into_bytes().len() as u32;
     header.node_offset = header.bucket_offset + num_buckets * 4;
     header.file_size = header.node_offset
-        + node_wrappers.iter().map(|x| x.node.as_bytes().len()).sum::<usize>() as u32;
+        + node_wrappers.iter().map(|x| x.node.into_bytes().len()).sum::<usize>() as u32;
 
     // sort nodes by bucket index for efficiency
     node_wrappers.sort_by(|a, b| a.bucket_index.cmp(&b.bucket_index));
@@ -116,7 +121,7 @@
         if buckets[node_bucket_idx as usize].is_none() {
             buckets[node_bucket_idx as usize] = Some(offset);
         }
-        offset += node_wrappers[i].node.as_bytes().len() as u32;
+        offset += node_wrappers[i].node.into_bytes().len() as u32;
 
         if let Some(index) = next_node_bucket_idx {
             if index == node_bucket_idx {
@@ -147,7 +152,7 @@
         FlagTableNode {
             package_id,
             flag_name: flag_name.to_string(),
-            flag_type,
+            flag_type: StoredFlagType::try_from(flag_type).unwrap(),
             flag_id,
             next_offset,
         }
@@ -203,12 +208,12 @@
         assert_eq!(nodes.len(), 8);
 
         assert_eq!(nodes[0], new_expected_node(0, "enabled_ro", 1, 1, None));
-        assert_eq!(nodes[1], new_expected_node(0, "enabled_rw", 1, 2, Some(151)));
+        assert_eq!(nodes[1], new_expected_node(0, "enabled_rw", 0, 2, Some(151)));
         assert_eq!(nodes[2], new_expected_node(1, "disabled_ro", 1, 0, None));
         assert_eq!(nodes[3], new_expected_node(2, "enabled_ro", 1, 1, None));
-        assert_eq!(nodes[4], new_expected_node(1, "enabled_fixed_ro", 1, 1, Some(236)));
+        assert_eq!(nodes[4], new_expected_node(1, "enabled_fixed_ro", 2, 1, Some(236)));
         assert_eq!(nodes[5], new_expected_node(1, "enabled_ro", 1, 2, None));
-        assert_eq!(nodes[6], new_expected_node(2, "enabled_fixed_ro", 1, 0, None));
-        assert_eq!(nodes[7], new_expected_node(0, "disabled_rw", 1, 0, None));
+        assert_eq!(nodes[6], new_expected_node(2, "enabled_fixed_ro", 2, 0, None));
+        assert_eq!(nodes[7], new_expected_node(0, "disabled_rw", 0, 0, None));
     }
 }
diff --git a/tools/aconfig/aconfig/src/storage/flag_value.rs b/tools/aconfig/aconfig/src/storage/flag_value.rs
index 293615e..4dcf751 100644
--- a/tools/aconfig/aconfig/src/storage/flag_value.rs
+++ b/tools/aconfig/aconfig/src/storage/flag_value.rs
@@ -53,7 +53,7 @@
     }
 
     // initialize all header fields
-    list.header.boolean_value_offset = list.header.as_bytes().len() as u32;
+    list.header.boolean_value_offset = list.header.into_bytes().len() as u32;
     list.header.file_size = list.header.boolean_value_offset + num_flags;
 
     Ok(list)
@@ -88,7 +88,7 @@
         assert_eq!(header, &expected_header);
 
         let booleans: &Vec<bool> = &flag_value_list.as_ref().unwrap().booleans;
-        let expected_booleans: Vec<bool> = vec![false; header.num_flags as usize];
+        let expected_booleans: Vec<bool> = vec![false, true, true, false, true, true, true, true];
         assert_eq!(booleans, &expected_booleans);
     }
 }
diff --git a/tools/aconfig/aconfig/src/storage/mod.rs b/tools/aconfig/aconfig/src/storage/mod.rs
index 3f5f8de..30517de 100644
--- a/tools/aconfig/aconfig/src/storage/mod.rs
+++ b/tools/aconfig/aconfig/src/storage/mod.rs
@@ -97,15 +97,15 @@
     match file {
         StorageFileType::PackageMap => {
             let package_table = create_package_table(container, &packages)?;
-            Ok(package_table.as_bytes())
+            Ok(package_table.into_bytes())
         }
         StorageFileType::FlagMap => {
             let flag_table = create_flag_table(container, &packages)?;
-            Ok(flag_table.as_bytes())
+            Ok(flag_table.into_bytes())
         }
         StorageFileType::FlagVal => {
             let flag_value = create_flag_value(container, &packages)?;
-            Ok(flag_value.as_bytes())
+            Ok(flag_value.into_bytes())
         }
         _ => Err(anyhow!("aconfig does not support the creation of this storage file type")),
     }
@@ -122,30 +122,38 @@
                 "com.android.aconfig.storage.test_1",
                 "storage_test_1.aconfig",
                 include_bytes!("../../tests/storage_test_1.aconfig").as_slice(),
+                "storage_test_1.value",
+                include_bytes!("../../tests/storage_test_1.values").as_slice(),
             ),
             (
                 "com.android.aconfig.storage.test_2",
                 "storage_test_2.aconfig",
                 include_bytes!("../../tests/storage_test_2.aconfig").as_slice(),
+                "storage_test_2.value",
+                include_bytes!("../../tests/storage_test_2.values").as_slice(),
             ),
             (
                 "com.android.aconfig.storage.test_4",
                 "storage_test_4.aconfig",
                 include_bytes!("../../tests/storage_test_4.aconfig").as_slice(),
+                "storage_test_4.value",
+                include_bytes!("../../tests/storage_test_4.values").as_slice(),
             ),
         ];
-
         aconfig_files
             .into_iter()
-            .map(|(pkg, file, content)| {
+            .map(|(pkg, aconfig_file, aconfig_content, value_file, value_content)| {
                 let bytes = crate::commands::parse_flags(
                     pkg,
                     Some("system"),
                     vec![Input {
-                        source: format!("tests/{}", file).to_string(),
-                        reader: Box::new(content),
+                        source: format!("tests/{}", aconfig_file).to_string(),
+                        reader: Box::new(aconfig_content),
                     }],
-                    vec![],
+                    vec![Input {
+                        source: format!("tests/{}", value_file).to_string(),
+                        reader: Box::new(value_content),
+                    }],
                     crate::commands::DEFAULT_FLAG_PERMISSION,
                 )
                 .unwrap();
diff --git a/tools/aconfig/aconfig/src/storage/package_table.rs b/tools/aconfig/aconfig/src/storage/package_table.rs
index ca0dec3..4e3d987 100644
--- a/tools/aconfig/aconfig/src/storage/package_table.rs
+++ b/tools/aconfig/aconfig/src/storage/package_table.rs
@@ -66,10 +66,10 @@
         packages.iter().map(|pkg| PackageTableNodeWrapper::new(pkg, num_buckets)).collect();
 
     // initialize all header fields
-    header.bucket_offset = header.as_bytes().len() as u32;
+    header.bucket_offset = header.into_bytes().len() as u32;
     header.node_offset = header.bucket_offset + num_buckets * 4;
     header.file_size = header.node_offset
-        + node_wrappers.iter().map(|x| x.node.as_bytes().len()).sum::<usize>() as u32;
+        + node_wrappers.iter().map(|x| x.node.into_bytes().len()).sum::<usize>() as u32;
 
     // sort node_wrappers by bucket index for efficiency
     node_wrappers.sort_by(|a, b| a.bucket_index.cmp(&b.bucket_index));
@@ -87,7 +87,7 @@
         if buckets[node_bucket_idx as usize].is_none() {
             buckets[node_bucket_idx as usize] = Some(offset);
         }
-        offset += node_wrappers[i].node.as_bytes().len() as u32;
+        offset += node_wrappers[i].node.into_bytes().len() as u32;
 
         if let Some(index) = next_node_bucket_idx {
             if index == node_bucket_idx {
diff --git a/tools/aconfig/aconfig/tests/storage_test_1.values b/tools/aconfig/aconfig/tests/storage_test_1.values
new file mode 100644
index 0000000..35548ae
--- /dev/null
+++ b/tools/aconfig/aconfig/tests/storage_test_1.values
@@ -0,0 +1,18 @@
+flag_value {
+    package: "com.android.aconfig.storage.test_1"
+    name: "enabled_rw"
+    state: ENABLED
+    permission: READ_WRITE
+}
+flag_value {
+    package: "com.android.aconfig.storage.test_1"
+    name: "disabled_rw"
+    state: DISABLED
+    permission: READ_WRITE
+}
+flag_value {
+    package: "com.android.aconfig.storage.test_1"
+    name: "enabled_ro"
+    state: ENABLED
+    permission: READ_ONLY
+}
diff --git a/tools/aconfig/aconfig/tests/storage_test_2.values b/tools/aconfig/aconfig/tests/storage_test_2.values
new file mode 100644
index 0000000..a7bb0b1
--- /dev/null
+++ b/tools/aconfig/aconfig/tests/storage_test_2.values
@@ -0,0 +1,18 @@
+flag_value {
+    package: "com.android.aconfig.storage.test_2"
+    name: "enabled_ro"
+    state: ENABLED
+    permission: READ_ONLY
+}
+flag_value {
+    package: "com.android.aconfig.storage.test_2"
+    name: "disabled_ro"
+    state: DISABLED
+    permission: READ_ONLY
+}
+flag_value {
+    package: "com.android.aconfig.storage.test_2"
+    name: "enabled_fixed_ro"
+    state: ENABLED
+    permission: READ_ONLY
+}
diff --git a/tools/aconfig/aconfig/tests/storage_test_4.values b/tools/aconfig/aconfig/tests/storage_test_4.values
new file mode 100644
index 0000000..fa21317
--- /dev/null
+++ b/tools/aconfig/aconfig/tests/storage_test_4.values
@@ -0,0 +1,12 @@
+flag_value {
+    package: "com.android.aconfig.storage.test_4"
+    name: "enabled_ro"
+    state: ENABLED
+    permission: READ_ONLY
+}
+flag_value {
+    package: "com.android.aconfig.storage.test_4"
+    name: "enabled_fixed_ro"
+    state: ENABLED
+    permission: READ_ONLY
+}
diff --git a/tools/aconfig/aconfig_storage_file/src/flag_info.rs b/tools/aconfig/aconfig_storage_file/src/flag_info.rs
index 6ece543..c67e70e 100644
--- a/tools/aconfig/aconfig_storage_file/src/flag_info.rs
+++ b/tools/aconfig/aconfig_storage_file/src/flag_info.rs
@@ -55,7 +55,7 @@
 
 impl FlagInfoHeader {
     /// Serialize to bytes
-    pub fn as_bytes(&self) -> Vec<u8> {
+    pub fn into_bytes(&self) -> Vec<u8> {
         let mut result = Vec::new();
         result.extend_from_slice(&self.version.to_le_bytes());
         let container_bytes = self.container.as_bytes();
@@ -118,7 +118,7 @@
 
 impl FlagInfoNode {
     /// Serialize to bytes
-    pub fn as_bytes(&self) -> Vec<u8> {
+    pub fn into_bytes(&self) -> Vec<u8> {
         let mut result = Vec::new();
         result.extend_from_slice(&self.attributes.to_le_bytes());
         result
@@ -154,10 +154,10 @@
 
 impl FlagInfoList {
     /// Serialize to bytes
-    pub fn as_bytes(&self) -> Vec<u8> {
+    pub fn into_bytes(&self) -> Vec<u8> {
         [
-            self.header.as_bytes(),
-            self.nodes.iter().map(|v| v.as_bytes()).collect::<Vec<_>>().concat(),
+            self.header.into_bytes(),
+            self.nodes.iter().map(|v| v.into_bytes()).collect::<Vec<_>>().concat(),
         ]
         .concat()
     }
@@ -166,11 +166,11 @@
     pub fn from_bytes(bytes: &[u8]) -> Result<Self, AconfigStorageError> {
         let header = FlagInfoHeader::from_bytes(bytes)?;
         let num_flags = header.num_flags;
-        let mut head = header.as_bytes().len();
+        let mut head = header.into_bytes().len();
         let nodes = (0..num_flags)
             .map(|_| {
                 let node = FlagInfoNode::from_bytes(&bytes[head..])?;
-                head += node.as_bytes().len();
+                head += node.into_bytes().len();
                 Ok(node)
             })
             .collect::<Result<Vec<_>, AconfigStorageError>>()
@@ -196,17 +196,17 @@
         let flag_info_list = create_test_flag_info_list();
 
         let header: &FlagInfoHeader = &flag_info_list.header;
-        let reinterpreted_header = FlagInfoHeader::from_bytes(&header.as_bytes());
+        let reinterpreted_header = FlagInfoHeader::from_bytes(&header.into_bytes());
         assert!(reinterpreted_header.is_ok());
         assert_eq!(header, &reinterpreted_header.unwrap());
 
         let nodes: &Vec<FlagInfoNode> = &flag_info_list.nodes;
         for node in nodes.iter() {
-            let reinterpreted_node = FlagInfoNode::from_bytes(&node.as_bytes()).unwrap();
+            let reinterpreted_node = FlagInfoNode::from_bytes(&node.into_bytes()).unwrap();
             assert_eq!(node, &reinterpreted_node);
         }
 
-        let flag_info_bytes = flag_info_list.as_bytes();
+        let flag_info_bytes = flag_info_list.into_bytes();
         let reinterpreted_info_list = FlagInfoList::from_bytes(&flag_info_bytes);
         assert!(reinterpreted_info_list.is_ok());
         assert_eq!(&flag_info_list, &reinterpreted_info_list.unwrap());
@@ -218,7 +218,7 @@
     // bytes
     fn test_version_number() {
         let flag_info_list = create_test_flag_info_list();
-        let bytes = &flag_info_list.as_bytes();
+        let bytes = &flag_info_list.into_bytes();
         let mut head = 0;
         let version = read_u32_from_bytes(bytes, &mut head).unwrap();
         assert_eq!(version, 1234)
@@ -229,7 +229,7 @@
     fn test_file_type_check() {
         let mut flag_info_list = create_test_flag_info_list();
         flag_info_list.header.file_type = 123u8;
-        let error = FlagInfoList::from_bytes(&flag_info_list.as_bytes()).unwrap_err();
+        let error = FlagInfoList::from_bytes(&flag_info_list.into_bytes()).unwrap_err();
         assert_eq!(
             format!("{:?}", error),
             format!("BytesParseFail(binary file is not a flag info file)")
diff --git a/tools/aconfig/aconfig_storage_file/src/flag_table.rs b/tools/aconfig/aconfig_storage_file/src/flag_table.rs
index f9b3158..98a1321 100644
--- a/tools/aconfig/aconfig_storage_file/src/flag_table.rs
+++ b/tools/aconfig/aconfig_storage_file/src/flag_table.rs
@@ -21,7 +21,7 @@
     get_bucket_index, read_str_from_bytes, read_u16_from_bytes, read_u32_from_bytes,
     read_u8_from_bytes,
 };
-use crate::{AconfigStorageError, StorageFileType};
+use crate::{AconfigStorageError, StorageFileType, StoredFlagType};
 use anyhow::anyhow;
 use std::fmt;
 
@@ -59,7 +59,7 @@
 
 impl FlagTableHeader {
     /// Serialize to bytes
-    pub fn as_bytes(&self) -> Vec<u8> {
+    pub fn into_bytes(&self) -> Vec<u8> {
         let mut result = Vec::new();
         result.extend_from_slice(&self.version.to_le_bytes());
         let container_bytes = self.container.as_bytes();
@@ -99,7 +99,7 @@
 pub struct FlagTableNode {
     pub package_id: u32,
     pub flag_name: String,
-    pub flag_type: u16,
+    pub flag_type: StoredFlagType,
     pub flag_id: u16,
     pub next_offset: Option<u32>,
 }
@@ -109,7 +109,7 @@
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         writeln!(
             f,
-            "Package Id: {}, Flag: {}, Type: {}, Offset: {}, Next: {:?}",
+            "Package Id: {}, Flag: {}, Type: {:?}, Offset: {}, Next: {:?}",
             self.package_id, self.flag_name, self.flag_type, self.flag_id, self.next_offset
         )?;
         Ok(())
@@ -118,13 +118,13 @@
 
 impl FlagTableNode {
     /// Serialize to bytes
-    pub fn as_bytes(&self) -> Vec<u8> {
+    pub fn into_bytes(&self) -> Vec<u8> {
         let mut result = Vec::new();
         result.extend_from_slice(&self.package_id.to_le_bytes());
         let name_bytes = self.flag_name.as_bytes();
         result.extend_from_slice(&(name_bytes.len() as u32).to_le_bytes());
         result.extend_from_slice(name_bytes);
-        result.extend_from_slice(&self.flag_type.to_le_bytes());
+        result.extend_from_slice(&(self.flag_type as u16).to_le_bytes());
         result.extend_from_slice(&self.flag_id.to_le_bytes());
         result.extend_from_slice(&self.next_offset.unwrap_or(0).to_le_bytes());
         result
@@ -136,7 +136,7 @@
         let node = Self {
             package_id: read_u32_from_bytes(bytes, &mut head)?,
             flag_name: read_str_from_bytes(bytes, &mut head)?,
-            flag_type: read_u16_from_bytes(bytes, &mut head)?,
+            flag_type: StoredFlagType::try_from(read_u16_from_bytes(bytes, &mut head)?)?,
             flag_id: read_u16_from_bytes(bytes, &mut head)?,
             next_offset: match read_u32_from_bytes(bytes, &mut head)? {
                 0 => None,
@@ -178,11 +178,11 @@
 /// Flag table struct
 impl FlagTable {
     /// Serialize to bytes
-    pub fn as_bytes(&self) -> Vec<u8> {
+    pub fn into_bytes(&self) -> Vec<u8> {
         [
-            self.header.as_bytes(),
+            self.header.into_bytes(),
             self.buckets.iter().map(|v| v.unwrap_or(0).to_le_bytes()).collect::<Vec<_>>().concat(),
-            self.nodes.iter().map(|v| v.as_bytes()).collect::<Vec<_>>().concat(),
+            self.nodes.iter().map(|v| v.into_bytes()).collect::<Vec<_>>().concat(),
         ]
         .concat()
     }
@@ -192,7 +192,7 @@
         let header = FlagTableHeader::from_bytes(bytes)?;
         let num_flags = header.num_flags;
         let num_buckets = crate::get_table_size(num_flags)?;
-        let mut head = header.as_bytes().len();
+        let mut head = header.into_bytes().len();
         let buckets = (0..num_buckets)
             .map(|_| match read_u32_from_bytes(bytes, &mut head).unwrap() {
                 0 => None,
@@ -202,7 +202,7 @@
         let nodes = (0..num_flags)
             .map(|_| {
                 let node = FlagTableNode::from_bytes(&bytes[head..])?;
-                head += node.as_bytes().len();
+                head += node.into_bytes().len();
                 Ok(node)
             })
             .collect::<Result<Vec<_>, AconfigStorageError>>()
@@ -226,17 +226,17 @@
         let flag_table = create_test_flag_table();
 
         let header: &FlagTableHeader = &flag_table.header;
-        let reinterpreted_header = FlagTableHeader::from_bytes(&header.as_bytes());
+        let reinterpreted_header = FlagTableHeader::from_bytes(&header.into_bytes());
         assert!(reinterpreted_header.is_ok());
         assert_eq!(header, &reinterpreted_header.unwrap());
 
         let nodes: &Vec<FlagTableNode> = &flag_table.nodes;
         for node in nodes.iter() {
-            let reinterpreted_node = FlagTableNode::from_bytes(&node.as_bytes()).unwrap();
+            let reinterpreted_node = FlagTableNode::from_bytes(&node.into_bytes()).unwrap();
             assert_eq!(node, &reinterpreted_node);
         }
 
-        let flag_table_bytes = flag_table.as_bytes();
+        let flag_table_bytes = flag_table.into_bytes();
         let reinterpreted_table = FlagTable::from_bytes(&flag_table_bytes);
         assert!(reinterpreted_table.is_ok());
         assert_eq!(&flag_table, &reinterpreted_table.unwrap());
@@ -248,7 +248,7 @@
     // bytes
     fn test_version_number() {
         let flag_table = create_test_flag_table();
-        let bytes = &flag_table.as_bytes();
+        let bytes = &flag_table.into_bytes();
         let mut head = 0;
         let version = read_u32_from_bytes(bytes, &mut head).unwrap();
         assert_eq!(version, 1234)
@@ -259,7 +259,7 @@
     fn test_file_type_check() {
         let mut flag_table = create_test_flag_table();
         flag_table.header.file_type = 123u8;
-        let error = FlagTable::from_bytes(&flag_table.as_bytes()).unwrap_err();
+        let error = FlagTable::from_bytes(&flag_table.into_bytes()).unwrap_err();
         assert_eq!(
             format!("{:?}", error),
             format!("BytesParseFail(binary file is not a flag map)")
diff --git a/tools/aconfig/aconfig_storage_file/src/flag_value.rs b/tools/aconfig/aconfig_storage_file/src/flag_value.rs
index c9d09a1..40ccb34 100644
--- a/tools/aconfig/aconfig_storage_file/src/flag_value.rs
+++ b/tools/aconfig/aconfig_storage_file/src/flag_value.rs
@@ -55,7 +55,7 @@
 
 impl FlagValueHeader {
     /// Serialize to bytes
-    pub fn as_bytes(&self) -> Vec<u8> {
+    pub fn into_bytes(&self) -> Vec<u8> {
         let mut result = Vec::new();
         result.extend_from_slice(&self.version.to_le_bytes());
         let container_bytes = self.container.as_bytes();
@@ -108,9 +108,9 @@
 
 impl FlagValueList {
     /// Serialize to bytes
-    pub fn as_bytes(&self) -> Vec<u8> {
+    pub fn into_bytes(&self) -> Vec<u8> {
         [
-            self.header.as_bytes(),
+            self.header.into_bytes(),
             self.booleans.iter().map(|&v| u8::from(v).to_le_bytes()).collect::<Vec<_>>().concat(),
         ]
         .concat()
@@ -120,7 +120,7 @@
     pub fn from_bytes(bytes: &[u8]) -> Result<Self, AconfigStorageError> {
         let header = FlagValueHeader::from_bytes(bytes)?;
         let num_flags = header.num_flags;
-        let mut head = header.as_bytes().len();
+        let mut head = header.into_bytes().len();
         let booleans =
             (0..num_flags).map(|_| read_u8_from_bytes(bytes, &mut head).unwrap() == 1).collect();
         let list = Self { header, booleans };
@@ -139,11 +139,11 @@
         let flag_value_list = create_test_flag_value_list();
 
         let header: &FlagValueHeader = &flag_value_list.header;
-        let reinterpreted_header = FlagValueHeader::from_bytes(&header.as_bytes());
+        let reinterpreted_header = FlagValueHeader::from_bytes(&header.into_bytes());
         assert!(reinterpreted_header.is_ok());
         assert_eq!(header, &reinterpreted_header.unwrap());
 
-        let flag_value_bytes = flag_value_list.as_bytes();
+        let flag_value_bytes = flag_value_list.into_bytes();
         let reinterpreted_value_list = FlagValueList::from_bytes(&flag_value_bytes);
         assert!(reinterpreted_value_list.is_ok());
         assert_eq!(&flag_value_list, &reinterpreted_value_list.unwrap());
@@ -155,7 +155,7 @@
     // bytes
     fn test_version_number() {
         let flag_value_list = create_test_flag_value_list();
-        let bytes = &flag_value_list.as_bytes();
+        let bytes = &flag_value_list.into_bytes();
         let mut head = 0;
         let version = read_u32_from_bytes(bytes, &mut head).unwrap();
         assert_eq!(version, 1234)
@@ -166,7 +166,7 @@
     fn test_file_type_check() {
         let mut flag_value_list = create_test_flag_value_list();
         flag_value_list.header.file_type = 123u8;
-        let error = FlagValueList::from_bytes(&flag_value_list.as_bytes()).unwrap_err();
+        let error = FlagValueList::from_bytes(&flag_value_list.into_bytes()).unwrap_err();
         assert_eq!(
             format!("{:?}", error),
             format!("BytesParseFail(binary file is not a flag value file)")
diff --git a/tools/aconfig/aconfig_storage_file/src/lib.rs b/tools/aconfig/aconfig_storage_file/src/lib.rs
index 50ac69d..a47926f 100644
--- a/tools/aconfig/aconfig_storage_file/src/lib.rs
+++ b/tools/aconfig/aconfig_storage_file/src/lib.rs
@@ -52,7 +52,7 @@
 pub use crate::flag_value::{FlagValueHeader, FlagValueList};
 pub use crate::package_table::{PackageTable, PackageTableHeader, PackageTableNode};
 
-use crate::AconfigStorageError::{BytesParseFail, HashTableSizeLimit};
+use crate::AconfigStorageError::{BytesParseFail, HashTableSizeLimit, InvalidStoredFlagType};
 
 /// Storage file version
 pub const FILE_VERSION: u32 = 1;
@@ -83,7 +83,7 @@
             "flag_val" => Ok(Self::FlagVal),
             "flag_info" => Ok(Self::FlagInfo),
             _ => Err(anyhow!(
-                "Invalid storage file type, valid types are package_map|flag_map|flag_val"
+                "Invalid storage file type, valid types are package_map|flag_map|flag_val|flag_info"
             )),
         }
     }
@@ -103,6 +103,27 @@
     }
 }
 
+/// Flag type enum as stored by storage file
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum StoredFlagType {
+    ReadWriteBoolean = 0,
+    ReadOnlyBoolean = 1,
+    FixedReadOnlyBoolean = 2,
+}
+
+impl TryFrom<u16> for StoredFlagType {
+    type Error = AconfigStorageError;
+
+    fn try_from(value: u16) -> Result<Self, Self::Error> {
+        match value {
+            x if x == Self::ReadWriteBoolean as u16 => Ok(Self::ReadWriteBoolean),
+            x if x == Self::ReadOnlyBoolean as u16 => Ok(Self::ReadOnlyBoolean),
+            x if x == Self::FixedReadOnlyBoolean as u16 => Ok(Self::FixedReadOnlyBoolean),
+            _ => Err(InvalidStoredFlagType(anyhow!("Invalid stored flag type"))),
+        }
+    }
+}
+
 /// Get the right hash table size given number of entries in the table. Use a
 /// load factor of 0.5 for performance.
 pub fn get_table_size(entries: u32) -> Result<u32, AconfigStorageError> {
@@ -201,6 +222,9 @@
 
     #[error("failed to create file")]
     FileCreationFail(#[source] anyhow::Error),
+
+    #[error("invalid stored flag type")]
+    InvalidStoredFlagType(#[source] anyhow::Error),
 }
 
 /// Read in storage file as bytes
@@ -258,10 +282,10 @@
     // this test point locks down the flag list api
     fn test_list_flag() {
         let package_table =
-            write_bytes_to_temp_file(&create_test_package_table().as_bytes()).unwrap();
-        let flag_table = write_bytes_to_temp_file(&create_test_flag_table().as_bytes()).unwrap();
+            write_bytes_to_temp_file(&create_test_package_table().into_bytes()).unwrap();
+        let flag_table = write_bytes_to_temp_file(&create_test_flag_table().into_bytes()).unwrap();
         let flag_value_list =
-            write_bytes_to_temp_file(&create_test_flag_value_list().as_bytes()).unwrap();
+            write_bytes_to_temp_file(&create_test_flag_value_list().into_bytes()).unwrap();
 
         let package_table_path = package_table.path().display().to_string();
         let flag_table_path = flag_table.path().display().to_string();
diff --git a/tools/aconfig/aconfig_storage_file/src/package_table.rs b/tools/aconfig/aconfig_storage_file/src/package_table.rs
index 7cb60eb..e377115 100644
--- a/tools/aconfig/aconfig_storage_file/src/package_table.rs
+++ b/tools/aconfig/aconfig_storage_file/src/package_table.rs
@@ -56,7 +56,7 @@
 
 impl PackageTableHeader {
     /// Serialize to bytes
-    pub fn as_bytes(&self) -> Vec<u8> {
+    pub fn into_bytes(&self) -> Vec<u8> {
         let mut result = Vec::new();
         result.extend_from_slice(&self.version.to_le_bytes());
         let container_bytes = self.container.as_bytes();
@@ -116,7 +116,7 @@
 
 impl PackageTableNode {
     /// Serialize to bytes
-    pub fn as_bytes(&self) -> Vec<u8> {
+    pub fn into_bytes(&self) -> Vec<u8> {
         let mut result = Vec::new();
         let name_bytes = self.package_name.as_bytes();
         result.extend_from_slice(&(name_bytes.len() as u32).to_le_bytes());
@@ -175,11 +175,11 @@
 
 impl PackageTable {
     /// Serialize to bytes
-    pub fn as_bytes(&self) -> Vec<u8> {
+    pub fn into_bytes(&self) -> Vec<u8> {
         [
-            self.header.as_bytes(),
+            self.header.into_bytes(),
             self.buckets.iter().map(|v| v.unwrap_or(0).to_le_bytes()).collect::<Vec<_>>().concat(),
-            self.nodes.iter().map(|v| v.as_bytes()).collect::<Vec<_>>().concat(),
+            self.nodes.iter().map(|v| v.into_bytes()).collect::<Vec<_>>().concat(),
         ]
         .concat()
     }
@@ -189,7 +189,7 @@
         let header = PackageTableHeader::from_bytes(bytes)?;
         let num_packages = header.num_packages;
         let num_buckets = crate::get_table_size(num_packages)?;
-        let mut head = header.as_bytes().len();
+        let mut head = header.into_bytes().len();
         let buckets = (0..num_buckets)
             .map(|_| match read_u32_from_bytes(bytes, &mut head).unwrap() {
                 0 => None,
@@ -199,7 +199,7 @@
         let nodes = (0..num_packages)
             .map(|_| {
                 let node = PackageTableNode::from_bytes(&bytes[head..])?;
-                head += node.as_bytes().len();
+                head += node.into_bytes().len();
                 Ok(node)
             })
             .collect::<Result<Vec<_>, AconfigStorageError>>()
@@ -225,17 +225,17 @@
     fn test_serialization() {
         let package_table = create_test_package_table();
         let header: &PackageTableHeader = &package_table.header;
-        let reinterpreted_header = PackageTableHeader::from_bytes(&header.as_bytes());
+        let reinterpreted_header = PackageTableHeader::from_bytes(&header.into_bytes());
         assert!(reinterpreted_header.is_ok());
         assert_eq!(header, &reinterpreted_header.unwrap());
 
         let nodes: &Vec<PackageTableNode> = &package_table.nodes;
         for node in nodes.iter() {
-            let reinterpreted_node = PackageTableNode::from_bytes(&node.as_bytes()).unwrap();
+            let reinterpreted_node = PackageTableNode::from_bytes(&node.into_bytes()).unwrap();
             assert_eq!(node, &reinterpreted_node);
         }
 
-        let package_table_bytes = package_table.as_bytes();
+        let package_table_bytes = package_table.into_bytes();
         let reinterpreted_table = PackageTable::from_bytes(&package_table_bytes);
         assert!(reinterpreted_table.is_ok());
         assert_eq!(&package_table, &reinterpreted_table.unwrap());
@@ -247,7 +247,7 @@
     // bytes
     fn test_version_number() {
         let package_table = create_test_package_table();
-        let bytes = &package_table.as_bytes();
+        let bytes = &package_table.into_bytes();
         let mut head = 0;
         let version = read_u32_from_bytes(bytes, &mut head).unwrap();
         assert_eq!(version, 1234)
@@ -258,7 +258,7 @@
     fn test_file_type_check() {
         let mut package_table = create_test_package_table();
         package_table.header.file_type = 123u8;
-        let error = PackageTable::from_bytes(&package_table.as_bytes()).unwrap_err();
+        let error = PackageTable::from_bytes(&package_table.into_bytes()).unwrap_err();
         assert_eq!(
             format!("{:?}", error),
             format!("BytesParseFail(binary file is not a package map)")
diff --git a/tools/aconfig/aconfig_storage_file/src/test_utils.rs b/tools/aconfig/aconfig_storage_file/src/test_utils.rs
index 4641829..4097ba6 100644
--- a/tools/aconfig/aconfig_storage_file/src/test_utils.rs
+++ b/tools/aconfig/aconfig_storage_file/src/test_utils.rs
@@ -18,7 +18,7 @@
 use crate::flag_table::{FlagTable, FlagTableHeader, FlagTableNode};
 use crate::flag_value::{FlagValueHeader, FlagValueList};
 use crate::package_table::{PackageTable, PackageTableHeader, PackageTableNode};
-use crate::{AconfigStorageError, StorageFileType};
+use crate::{AconfigStorageError, StorageFileType, StoredFlagType};
 
 use anyhow::anyhow;
 use std::io::Write;
@@ -66,7 +66,13 @@
         flag_id: u16,
         next_offset: Option<u32>,
     ) -> Self {
-        Self { package_id, flag_name: flag_name.to_string(), flag_type, flag_id, next_offset }
+        Self {
+            package_id,
+            flag_name: flag_name.to_string(),
+            flag_type: StoredFlagType::try_from(flag_type).unwrap(),
+            flag_id,
+            next_offset,
+        }
     }
 }
 
diff --git a/tools/aconfig/aconfig_storage_read_api/src/flag_table_query.rs b/tools/aconfig/aconfig_storage_read_api/src/flag_table_query.rs
index 43977ee..8ce2397 100644
--- a/tools/aconfig/aconfig_storage_read_api/src/flag_table_query.rs
+++ b/tools/aconfig/aconfig_storage_read_api/src/flag_table_query.rs
@@ -65,7 +65,7 @@
 #[cfg(test)]
 mod tests {
     use super::*;
-    use aconfig_storage_file::{FlagTable, StorageFileType};
+    use aconfig_storage_file::{FlagTable, StorageFileType, StoredFlagType};
 
     // create test baseline, syntactic sugar
     fn new_expected_node(
@@ -78,7 +78,7 @@
         FlagTableNode {
             package_id,
             flag_name: flag_name.to_string(),
-            flag_type,
+            flag_type: StoredFlagType::try_from(flag_type).unwrap(),
             flag_id,
             next_offset,
         }
@@ -129,7 +129,7 @@
     #[test]
     // this test point locks down table query
     fn test_flag_query() {
-        let flag_table = create_test_flag_table().as_bytes();
+        let flag_table = create_test_flag_table().into_bytes();
         let baseline = vec![
             (0, "enabled_ro", 1u16),
             (0, "enabled_rw", 2u16),
@@ -150,7 +150,7 @@
     #[test]
     // this test point locks down table query of a non exist flag
     fn test_not_existed_flag_query() {
-        let flag_table = create_test_flag_table().as_bytes();
+        let flag_table = create_test_flag_table().into_bytes();
         let flag_offset = find_flag_offset(&flag_table[..], 1, "disabled_fixed_ro").unwrap();
         assert_eq!(flag_offset, None);
         let flag_offset = find_flag_offset(&flag_table[..], 2, "disabled_rw").unwrap();
@@ -162,7 +162,7 @@
     fn test_higher_version_storage_file() {
         let mut table = create_test_flag_table();
         table.header.version = crate::FILE_VERSION + 1;
-        let flag_table = table.as_bytes();
+        let flag_table = table.into_bytes();
         let error = find_flag_offset(&flag_table[..], 0, "enabled_ro").unwrap_err();
         assert_eq!(
             format!("{:?}", error),
diff --git a/tools/aconfig/aconfig_storage_read_api/src/flag_value_query.rs b/tools/aconfig/aconfig_storage_read_api/src/flag_value_query.rs
index 88d2397..964cd69 100644
--- a/tools/aconfig/aconfig_storage_read_api/src/flag_value_query.rs
+++ b/tools/aconfig/aconfig_storage_read_api/src/flag_value_query.rs
@@ -66,7 +66,7 @@
     #[test]
     // this test point locks down flag value query
     fn test_flag_value_query() {
-        let flag_value_list = create_test_flag_value_list().as_bytes();
+        let flag_value_list = create_test_flag_value_list().into_bytes();
         let baseline: Vec<bool> = vec![false, true, false, false, true, true, false, true];
         for (offset, expected_value) in baseline.into_iter().enumerate() {
             let flag_value = find_boolean_flag_value(&flag_value_list[..], offset as u32).unwrap();
@@ -77,7 +77,7 @@
     #[test]
     // this test point locks down query beyond the end of boolean section
     fn test_boolean_out_of_range() {
-        let flag_value_list = create_test_flag_value_list().as_bytes();
+        let flag_value_list = create_test_flag_value_list().into_bytes();
         let error = find_boolean_flag_value(&flag_value_list[..], 8).unwrap_err();
         assert_eq!(
             format!("{:?}", error),
@@ -90,7 +90,7 @@
     fn test_higher_version_storage_file() {
         let mut value_list = create_test_flag_value_list();
         value_list.header.version = crate::FILE_VERSION + 1;
-        let flag_value = value_list.as_bytes();
+        let flag_value = value_list.into_bytes();
         let error = find_boolean_flag_value(&flag_value[..], 4).unwrap_err();
         assert_eq!(
             format!("{:?}", error),
diff --git a/tools/aconfig/aconfig_storage_read_api/src/package_table_query.rs b/tools/aconfig/aconfig_storage_read_api/src/package_table_query.rs
index 3587e10..190de99 100644
--- a/tools/aconfig/aconfig_storage_read_api/src/package_table_query.rs
+++ b/tools/aconfig/aconfig_storage_read_api/src/package_table_query.rs
@@ -110,7 +110,7 @@
     #[test]
     // this test point locks down table query
     fn test_package_query() {
-        let package_table = create_test_package_table().as_bytes();
+        let package_table = create_test_package_table().into_bytes();
         let package_offset =
             find_package_offset(&package_table[..], "com.android.aconfig.storage.test_1")
                 .unwrap()
@@ -135,7 +135,7 @@
     // this test point locks down table query of a non exist package
     fn test_not_existed_package_query() {
         // this will land at an empty bucket
-        let package_table = create_test_package_table().as_bytes();
+        let package_table = create_test_package_table().into_bytes();
         let package_offset =
             find_package_offset(&package_table[..], "com.android.aconfig.storage.test_3").unwrap();
         assert_eq!(package_offset, None);
@@ -150,7 +150,7 @@
     fn test_higher_version_storage_file() {
         let mut table = create_test_package_table();
         table.header.version = crate::FILE_VERSION + 1;
-        let package_table = table.as_bytes();
+        let package_table = table.into_bytes();
         let error = find_package_offset(&package_table[..], "com.android.aconfig.storage.test_1")
             .unwrap_err();
         assert_eq!(
diff --git a/tools/aconfig/aconfig_storage_write_api/src/flag_value_update.rs b/tools/aconfig/aconfig_storage_write_api/src/flag_value_update.rs
index c2375dd..4cb7939 100644
--- a/tools/aconfig/aconfig_storage_write_api/src/flag_value_update.rs
+++ b/tools/aconfig/aconfig_storage_write_api/src/flag_value_update.rs
@@ -71,7 +71,7 @@
     fn test_boolean_flag_value_update() {
         let flag_value_list = create_test_flag_value_list();
         let value_offset = flag_value_list.header.boolean_value_offset;
-        let mut content = flag_value_list.as_bytes();
+        let mut content = flag_value_list.into_bytes();
         let true_byte = u8::from(true).to_le_bytes()[0];
         let false_byte = u8::from(false).to_le_bytes()[0];
 
@@ -87,7 +87,7 @@
     #[test]
     // this test point locks down update beyond the end of boolean section
     fn test_boolean_out_of_range() {
-        let mut flag_value_list = create_test_flag_value_list().as_bytes();
+        let mut flag_value_list = create_test_flag_value_list().into_bytes();
         let error = update_boolean_flag_value(&mut flag_value_list[..], 8, true).unwrap_err();
         assert_eq!(
             format!("{:?}", error),
@@ -100,7 +100,7 @@
     fn test_higher_version_storage_file() {
         let mut value_list = create_test_flag_value_list();
         value_list.header.version = FILE_VERSION + 1;
-        let mut flag_value = value_list.as_bytes();
+        let mut flag_value = value_list.into_bytes();
         let error = update_boolean_flag_value(&mut flag_value[..], 4, true).unwrap_err();
         assert_eq!(
             format!("{:?}", error),
diff --git a/tools/releasetools/ota_from_target_files.py b/tools/releasetools/ota_from_target_files.py
index c0ff5d2..67438e6 100755
--- a/tools/releasetools/ota_from_target_files.py
+++ b/tools/releasetools/ota_from_target_files.py
@@ -872,6 +872,7 @@
   target_info = common.BuildInfo(OPTIONS.info_dict, OPTIONS.oem_dicts)
   if OPTIONS.disable_vabc and target_info.is_release_key:
     raise ValueError("Disabling VABC on release-key builds is not supported.")
+
   ValidateCompressionParam(target_info)
   vabc_compression_param = target_info.vabc_compression_param
 
@@ -907,7 +908,6 @@
       logger.info("Source build and target build use different compression methods {} vs {}, default to source builds parameter {}".format(
           source_info.vabc_compression_param, target_info.vabc_compression_param, source_info.vabc_compression_param))
       vabc_compression_param = source_info.vabc_compression_param
-
     # Virtual AB Cow version 3 is introduced in Android U with improved memory
     # and install time performance. All OTA's with
     # both the source build and target build with VIRTUAL_AB_COW_VERSION = 3
@@ -918,6 +918,7 @@
     elif source_info.vabc_cow_version != target_info.vabc_cow_version:
       logger.info("Source and Target have different cow VABC_COW_VERSION specified, default to minimum version")
       OPTIONS.vabc_cow_version = min(source_info.vabc_cow_version, target_info.vabc_cow_version)
+
     # Virtual AB Compression was introduced in Androd S.
     # Later, we backported VABC to Android R. But verity support was not
     # backported, so if VABC is used and we are on Android R, disable
@@ -930,6 +931,19 @@
     assert "ab_partitions" in OPTIONS.info_dict, \
         "META/ab_partitions.txt is required for ab_update."
     source_info = None
+    if not target_info.vabc_cow_version:
+        OPTIONS.vabc_cow_version = 2
+    elif target_info.vabc_cow_version >= "3" and target_info.vendor_api_level < 35:
+      logger.warning(
+            "This full OTA is configured to use VABC cow version"
+            " 3 which is supported since"
+            " Android API level 35, but device is "
+            "launched with {} . If this full OTA is"
+            " served to a device running old build, OTA might fail due to "
+            "unsupported vabc cow version. For safety, version 2 is used because "
+            "it's supported since day 1.".format(
+                target_info.vendor_api_level))
+      OPTIONS.vabc_cow_version = 2
     if OPTIONS.vabc_compression_param is None and vabc_compression_param:
       minimum_api_level_required = VABC_COMPRESSION_PARAM_SUPPORT[
           vabc_compression_param]