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Commit 5d5906fb authored by Doug Anderson's avatar Doug Anderson Committed by Gerrit Code Review
Browse files

Merge changes I819eb60a,I48a52aa0,Iab04742c into main 

* changes:
  init: Reorder GetBlockDeviceSymlinks() so FindDmDevice() is first
  init: Add partition_uuid to Uevent
  fs_mgr: Add getter for androidboot.boot_part_uuid
parents 41e9d7d3 9f760f8d

fs_mgr/libfstab/fstab.cpp

+16 −0
Original line number Diff line number Diff line
@@ -950,6 +950,22 @@ std::set<std::string> GetBootDevices() { 
    return ExtraBootDevices(fstab);

}



std::string GetBootPartUuid() {

    std::string boot_part_uuid;



    if (GetBootconfig("androidboot.boot_part_uuid", &boot_part_uuid)) {

        return boot_part_uuid;

    }



    ImportKernelCmdline([&](std::string key, std::string value) {

        if (key == "androidboot.boot_part_uuid") {

            boot_part_uuid = value;

        }

    });



    return boot_part_uuid;

}



std::string GetVerityDeviceName(const FstabEntry& entry) {

    std::string base_device;

    if (entry.mount_point == "/") {

fs_mgr/libfstab/include/fstab/fstab.h

+10 −0
Original line number Diff line number Diff line
@@ -126,6 +126,16 @@ void TransformFstabForDsu(Fstab* fstab, const std::string& dsu_slot, 


std::set<std::string> GetBootDevices();



// Get the Partition UUID the kernel loaded from if the bootloader passed it.

//

// If the kernel's Partition UUID is provided then we can use this to help

// identify which block device contains the filesystems we care about.

//

// NOTE: Nothing secures a UUID other than the convention that two disks

// aren't supposed to both have the same UUID. We still need other mechanisms

// to ensure we've got the right disk.

std::string GetBootPartUuid();



// Return the name of the dm-verity device for the given fstab entry. This does

// not check whether the device is valid or exists; it merely returns the

// expected name.

init/devices.cpp

+7 −7
Original line number Diff line number Diff line
@@ -376,7 +376,13 @@ std::vector<std::string> DeviceHandler::GetBlockDeviceSymlinks(const Uevent& uev 
    std::string partition;

    std::string uuid;



    if (FindPlatformDevice(uevent.path, &device)) {

    if (FindDmDevice(uevent, &partition, &uuid)) {

        std::vector<std::string> symlinks = {"/dev/block/mapper/" + partition};

        if (!uuid.empty()) {

            symlinks.emplace_back("/dev/block/mapper/by-uuid/" + uuid);

        }

        return symlinks;

    } else if (FindPlatformDevice(uevent.path, &device)) {

        // Skip /devices/platform or /devices/ if present

        static constexpr std::string_view devices_platform_prefix = "/devices/platform/";

        static constexpr std::string_view devices_prefix = "/devices/";
@@ -392,12 +398,6 @@ std::vector<std::string> DeviceHandler::GetBlockDeviceSymlinks(const Uevent& uev 
        type = "pci";

    } else if (FindVbdDevicePrefix(uevent.path, &device)) {

        type = "vbd";

    } else if (FindDmDevice(uevent, &partition, &uuid)) {

        std::vector<std::string> symlinks = {"/dev/block/mapper/" + partition};

        if (!uuid.empty()) {

            symlinks.emplace_back("/dev/block/mapper/by-uuid/" + uuid);

        }

        return symlinks;

    } else {

        return {};

    }

init/uevent.h

+1 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ struct Uevent { 
    std::string subsystem;

    std::string firmware;

    std::string partition_name;

    std::string partition_uuid;

    std::string device_name;

    std::string modalias;

    int partition_num;

init/uevent_listener.cpp

+4 −1
Original line number Diff line number Diff line
@@ -66,6 +66,9 @@ static void ParseEvent(const char* msg, Uevent* uevent) { 
        } else if (!strncmp(msg, "PARTNAME=", 9)) {

            msg += 9;

            uevent->partition_name = msg;

        } else if (!strncmp(msg, "PARTUUID=", 9)) {

            msg += 9;

            uevent->partition_uuid = msg;

        } else if (!strncmp(msg, "DEVNAME=", 8)) {

            msg += 8;

            uevent->device_name = msg;
@@ -82,7 +85,7 @@ static void ParseEvent(const char* msg, Uevent* uevent) { 
    if (LOG_UEVENTS) {

        LOG(INFO) << "event { '" << uevent->action << "', '" << uevent->path << "', '"

                  << uevent->subsystem << "', '" << uevent->firmware << "', " << uevent->major

                  << ", " << uevent->minor << " }";

                  << ", " << uevent->minor << ", " << uevent->partition_uuid << " }";

    }

}