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Commit 997745dc authored by Dennis Shen's avatar Dennis Shen
Browse files

aconfig: add aconfig_storage_metadata proto 

Introduce a new proto to capture storage file location for each
container. This proto file will appeara as
/metadata/aconfig/storage_file_location.pb. Storage service daemon is
responsible for writing entires to it when a new storage file set is
available. The flag read lib will use this file to find the
corresponding storage file and mmap them.

Bug: b/321077378
Test: atest aconfig_storage_file.test
Change-Id: I226e76be895805dce52a075050dcd5b42d337be8
parent c7a1c76e

tools/aconfig/aconfig_storage_file/Android.bp

+11 −0
Original line number Diff line number Diff line
@@ -9,6 +9,9 @@ rust_defaults { 
    srcs: ["src/lib.rs"],

    rustlibs: [

        "libanyhow",

        "libaconfig_storage_protos",

        "libonce_cell",

        "libprotobuf",

    ],

}
@@ -24,3 +27,11 @@ rust_test_host { 
    test_suites: ["general-tests"],

    defaults: ["aconfig_storage_file.defaults"],

}



rust_protobuf {

    name: "libaconfig_storage_protos",

    protos: ["protos/aconfig_storage_metadata.proto"],

    crate_name: "aconfig_storage_protos",

    source_stem: "aconfig_storage_protos",

    host_supported: true,

}

tools/aconfig/aconfig_storage_file/Cargo.toml

+4 −0
Original line number Diff line number Diff line
@@ -9,3 +9,7 @@ cargo = [] 


[dependencies]

anyhow = "1.0.69"

protobuf = "3.2.0"



[build-dependencies]

protobuf-codegen = "3.2.0"

tools/aconfig/aconfig_storage_file/build.rs

0 → 100644
+17 −0
Original line number Diff line number Diff line 
use protobuf_codegen::Codegen;



fn main() {

    let proto_files = vec!["protos/aconfig_storage_metadata.proto"];



    // tell cargo to only re-run the build script if any of the proto files has changed

    for path in &proto_files {

        println!("cargo:rerun-if-changed={}", path);

    }



    Codegen::new()

        .pure()

        .include("protos")

        .inputs(proto_files)

        .cargo_out_dir("aconfig_storage_protos")

        .run_from_script();

}

tools/aconfig/aconfig_storage_file/protos/aconfig_storage_metadata.proto

0 → 100644
+34 −0
Original line number Diff line number Diff line 
// Copyright (C) 2024 The Android Open Source Project

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//      http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License



// This is the schema definition for aconfig files. Modifications need to be

// either backwards compatible, or include updates to all aconfig files in the

// Android tree.



syntax = "proto2";



package android.aconfig_storage_metadata;



message storage_file_info {

  optional uint32 version = 1;

  optional string container = 2;

  optional string package_map = 3;

  optional string flag_map = 4;

  optional string flag_val = 5;

  optional int64 timestamp = 6;

}



message storage_files {

  repeated storage_file_info files = 1;

};

tools/aconfig/aconfig_storage_file/src/lib.rs

+4 −0
Original line number Diff line number Diff line
@@ -21,6 +21,10 @@ pub mod flag_table; 
pub mod flag_value;

pub mod package_table;



mod protos;

#[cfg(test)]

mod test_utils;



use anyhow::{anyhow, Result};

use std::collections::hash_map::DefaultHasher;

use std::hash::{Hash, Hasher};