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Commit 69688245 authored by Yifan Hong's avatar Yifan Hong Committed by Gerrit Code Review
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Merge changes from topic "readonly_generic_ramdisk" 

* changes:
  Add /metadata to ramdisk.
  Also create dirs under /first_stage_ramdisk for GKI.
  Refactor the list of empty dirs in ramdisk in its own list.
  Revert "Move e2fsck into /first_stage_ramdisk."
parents 8571b761 a3f83730

init/Android.mk

+16 −7
Original line number Diff line number Diff line
@@ -75,13 +75,22 @@ LOCAL_REQUIRED_MODULES := \ 
   adb_debug.prop \



# Set up the directories that first stage init mounts on.

LOCAL_POST_INSTALL_CMD := mkdir -p \

    $(TARGET_RAMDISK_OUT)/debug_ramdisk \

    $(TARGET_RAMDISK_OUT)/dev \

    $(TARGET_RAMDISK_OUT)/mnt \

    $(TARGET_RAMDISK_OUT)/proc \

    $(TARGET_RAMDISK_OUT)/second_stage_resources \

    $(TARGET_RAMDISK_OUT)/sys \



my_ramdisk_dirs := \

    debug_ramdisk \

    dev \

    metadata \

    mnt \

    proc \

    second_stage_resources \

    sys \



LOCAL_POST_INSTALL_CMD := mkdir -p $(addprefix $(TARGET_RAMDISK_OUT)/,$(my_ramdisk_dirs))

ifeq (true,$(BOARD_USES_GENERIC_KERNEL_IMAGE))

    LOCAL_POST_INSTALL_CMD += $(addprefix $(TARGET_RAMDISK_OUT)/first_stage_ramdisk/,$(my_ramdisk_dirs))

endif



my_ramdisk_dirs :=



LOCAL_STATIC_LIBRARIES := \

    libc++fs \

init/first_stage_init.cpp

+0 −29
Original line number Diff line number Diff line
@@ -99,34 +99,6 @@ bool ForceNormalBoot(const std::string& cmdline) { 
    return cmdline.find("androidboot.force_normal_boot=1") != std::string::npos;

}



// Move e2fsck before switching root, so that it is available at the same path

// after switching root.

void PrepareSwitchRoot() {

    constexpr const char* src = "/system/bin/e2fsck";

    constexpr const char* dst = "/first_stage_ramdisk/system/bin/e2fsck";



    if (access(dst, X_OK) == 0) {

        LOG(INFO) << dst << " already exists and it can be executed";

        return;

    }



    if (access(src, F_OK) != 0) {

        PLOG(INFO) << "Not moving " << src << " because it cannot be accessed";

        return;

    }



    auto dst_dir = android::base::Dirname(dst);

    std::error_code ec;

    if (!fs::create_directories(dst_dir, ec) && !!ec) {

        LOG(FATAL) << "Cannot create " << dst_dir << ": " << ec.message();

    }

    if (rename(src, dst) != 0) {

        PLOG(FATAL) << "Cannot move " << src << " to " << dst

                    << ". Either install e2fsck.ramdisk so that it is at the correct place (" << dst

                    << "), or make ramdisk writable";

    }

}



}  // namespace



std::string GetModuleLoadList(bool recovery, const std::string& dir_path) {
@@ -327,7 +299,6 @@ int FirstStageMain(int argc, char** argv) { 


    if (ForceNormalBoot(cmdline)) {

        mkdir("/first_stage_ramdisk", 0755);

        PrepareSwitchRoot();

        // SwitchRoot() must be called with a mount point as the target, so we bind mount the

        // target directory to itself here.

        if (mount("/first_stage_ramdisk", "/first_stage_ramdisk", nullptr, MS_BIND, nullptr) != 0) {