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#include <kapi/filesystem.hpp>
#include <kernel/test_support/filesystem/storage_boot_module_vfs_fixture.hpp>
#include <kstd/system_error.hpp>
#include <catch2/catch_test_macros.hpp>
#include <algorithm>
#include <cstddef>
#include <filesystem>
#include <string_view>
#include <vector>
SCENARIO_METHOD(kernel::tests::filesystem::storage_boot_module_vfs_fixture, "Kapi filesystem with real images",
"[kapi][filesystem]")
{
auto const image_path_1 = std::filesystem::path{KERNEL_TEST_ASSETS_DIR} / "ext2_1KB_fs.img";
auto const image_path_2 = std::filesystem::path{KERNEL_TEST_ASSETS_DIR} / "ext2_2KB_fs.img";
GIVEN("Two real image files")
{
REQUIRE(std::filesystem::exists(image_path_1));
REQUIRE(std::filesystem::exists(image_path_2));
REQUIRE_NOTHROW(
setup_modules_from_img_and_init_vfs({"test_img_module_1", "test_img_module_2"}, {image_path_1, image_path_2}));
THEN("files can be opened, read and closed again")
{
auto fd = kapi::filesystem::open("/information/info_1.txt").value();
auto buffer = std::vector<std::byte>(6);
auto bytes_read = kapi::filesystem::read(fd, buffer.data(), buffer.size());
REQUIRE(bytes_read);
std::string_view buffer_as_str{reinterpret_cast<char *>(buffer.data()), static_cast<size_t>(*bytes_read)};
REQUIRE(buffer_as_str == "info_1");
REQUIRE(kapi::filesystem::close(fd));
}
THEN("files can be opened, written to, read from and closed again")
{
auto write_fd = kapi::filesystem::open("/information/info_1.txt");
REQUIRE(write_fd);
auto write_buffer = std::vector<std::byte>{std::byte{'H'}, std::byte{'e'}};
auto const bytes_written = kapi::filesystem::write(*write_fd, write_buffer.data(), write_buffer.size());
REQUIRE(bytes_written == 2);
auto read_fd = kapi::filesystem::open("/information/info_1.txt");
REQUIRE(read_fd);
auto read_buffer = std::vector<std::byte>(6);
auto const bytes_read = kapi::filesystem::read(*read_fd, read_buffer.data(), read_buffer.size());
REQUIRE(bytes_read);
std::string_view buffer_as_str{reinterpret_cast<char *>(read_buffer.data()), static_cast<size_t>(*bytes_read)};
REQUIRE(buffer_as_str == "Hefo_1");
REQUIRE(kapi::filesystem::close(*write_fd));
REQUIRE(kapi::filesystem::close(*read_fd));
}
THEN("files can be opened through absolute symbolic link, read and closed again")
{
auto fd = kapi::filesystem::open("/symlinks/information_directory_absolute/info_1.txt").value();
auto buffer = std::vector<std::byte>(6);
auto bytes_read = kapi::filesystem::read(fd, buffer.data(), buffer.size());
REQUIRE(bytes_read);
std::string_view buffer_as_str{reinterpret_cast<char *>(buffer.data()), static_cast<size_t>(*bytes_read)};
REQUIRE(buffer_as_str == "info_1");
REQUIRE(kapi::filesystem::close(fd));
}
THEN("files can be opened through relative symbolic link, read and closed again")
{
auto fd = kapi::filesystem::open("/symlinks/information_directory_relative/info_1.txt").value();
auto buffer = std::vector<std::byte>(6);
auto bytes_read = kapi::filesystem::read(fd, buffer.data(), buffer.size());
REQUIRE(bytes_read);
std::string_view buffer_as_str{reinterpret_cast<char *>(buffer.data()), static_cast<size_t>(*bytes_read)};
REQUIRE(buffer_as_str == "info_1");
REQUIRE(kapi::filesystem::close(fd));
}
THEN("files can be opened through relative symbolic link over multiple mount points, read and closed again")
{
CHECK(kapi::filesystem::mount("/archiv/2024.img", "/information"));
auto fd = kapi::filesystem::open("/information/symlinks/traverse_back_twice/information/sheep_1.txt").value();
auto buffer = std::vector<std::byte>(7);
auto bytes_read = kapi::filesystem::read(fd, buffer.data(), buffer.size());
REQUIRE(bytes_read);
std::string_view buffer_as_str{reinterpret_cast<char *>(buffer.data()), static_cast<size_t>(*bytes_read)};
REQUIRE(buffer_as_str == "sheep_1");
REQUIRE(kapi::filesystem::close(fd));
}
THEN("a filesystem can be mounted, files can be opened, read and closed again and unmounted")
{
REQUIRE(kapi::filesystem::mount("/dev/ram16", "/information"));
auto fd = kapi::filesystem::open("/information/monkey_house/monkey_1.txt").value();
auto buffer = std::vector<std::byte>(8);
auto bytes_read = kapi::filesystem::read(fd, buffer.data(), buffer.size());
REQUIRE(bytes_read);
std::string_view buffer_as_str{reinterpret_cast<char *>(buffer.data()), static_cast<size_t>(*bytes_read)};
REQUIRE(buffer_as_str == "monkey_1");
REQUIRE(kapi::filesystem::close(fd));
REQUIRE(kapi::filesystem::umount("/information"));
}
THEN("a filesystem cannot be unmounted if files are still open and can be unmounted after files are closed")
{
REQUIRE(kapi::filesystem::mount("/dev/ram16", "/information"));
auto fd = kapi::filesystem::open("/information/monkey_house/monkey_1.txt").value();
REQUIRE(!kapi::filesystem::umount("/information"));
REQUIRE(kapi::filesystem::close(fd));
REQUIRE(kapi::filesystem::umount("/information"));
}
THEN("device can be opened as file and read from")
{
auto fd = kapi::filesystem::open("/dev/ram0").value();
auto buffer = std::vector<std::byte>(512);
auto bytes_read = kapi::filesystem::read(fd, buffer.data(), buffer.size());
REQUIRE(bytes_read);
REQUIRE(kapi::filesystem::close(fd));
}
THEN("device can be opened as file and written to and read from again")
{
auto read_fd = kapi::filesystem::open("/dev/ram16").value();
auto buffer = std::vector<std::byte>(512, std::byte{0xAB});
auto bytes_written = kapi::filesystem::write(read_fd, buffer.data(), buffer.size());
REQUIRE(bytes_written);
auto write_fd = kapi::filesystem::open("/dev/ram16").value();
auto read_buffer = std::vector<std::byte>(512);
auto bytes_read = kapi::filesystem::read(write_fd, read_buffer.data(), read_buffer.size());
REQUIRE(bytes_read);
REQUIRE(std::equal(buffer.begin(), buffer.end(), read_buffer.begin()));
REQUIRE(kapi::filesystem::close(write_fd));
REQUIRE(kapi::filesystem::close(read_fd));
}
THEN("invalid paths cannot be mounted or unmounted")
{
REQUIRE(!kapi::filesystem::mount("/dev/ram16", "invalid_path"));
}
THEN("invalid paths cannot be unmounted")
{
REQUIRE(!kapi::filesystem::umount("invalid_path"));
}
THEN("non existent files cannot be opened")
{
auto fd = kapi::filesystem::open("/information/non_existent.txt");
REQUIRE(!fd);
}
THEN("not opened files cannot closed")
{
REQUIRE(!kapi::filesystem::close(999));
}
THEN("same file cannot be closed twice")
{
auto fd = kapi::filesystem::open("/information/info_1.txt").value();
REQUIRE(kapi::filesystem::close(fd));
REQUIRE(!kapi::filesystem::close(fd));
}
THEN("not opened files cannot be read from")
{
std::vector<std::byte> buffer(10);
auto const invalid_fd = 999uz;
auto bytes_read = kapi::filesystem::read(invalid_fd, buffer.data(), buffer.size());
REQUIRE(!bytes_read);
}
THEN("not opened files cannot be written to")
{
std::vector<std::byte> buffer(10);
auto const invalid_fd = 999uz;
auto bytes_written = kapi::filesystem::write(invalid_fd, buffer.data(), buffer.size());
REQUIRE(!bytes_written);
}
THEN("a new file can be created, written to, read from, and closed again")
{
auto new_file_path = "/information/new_information.txt";
REQUIRE(!kapi::filesystem::open(new_file_path));
REQUIRE(kapi::filesystem::create(new_file_path));
auto fd = kapi::filesystem::open(new_file_path);
REQUIRE(fd);
auto write_buffer = std::vector<std::byte>{std::byte{'T'}, std::byte{'e'}, std::byte{'s'}, std::byte{'t'}};
CHECK(kapi::filesystem::write(*fd, write_buffer.data(), write_buffer.size()));
REQUIRE(kapi::filesystem::close(*fd));
fd = kapi::filesystem::open(new_file_path);
REQUIRE(fd);
auto read_buffer = std::vector<std::byte>(4);
auto bytes_read = kapi::filesystem::read(*fd, read_buffer.data(), read_buffer.size());
std::string_view buffer_as_str{reinterpret_cast<char *>(read_buffer.data()), static_cast<size_t>(*bytes_read)};
REQUIRE(buffer_as_str == "Test");
REQUIRE(kapi::filesystem::close(*fd));
}
THEN("a new directory can be created and a file within can be created, opened, and closed again")
{
auto new_directory_path = "/information/new_directory";
auto new_file_path = "/information/new_directory/new_information.txt";
REQUIRE(!kapi::filesystem::open(new_file_path));
REQUIRE(kapi::filesystem::mkdir(new_directory_path));
REQUIRE(kapi::filesystem::create(new_file_path));
auto fd = kapi::filesystem::open(new_file_path);
REQUIRE(fd);
REQUIRE(kapi::filesystem::close(*fd));
}
THEN("a file can be created in a mounted filesystem, opened, and closed again")
{
CHECK(kapi::filesystem::mount("/dev/ram16", "/information"));
auto new_file_path = "/information/monkey_house/monkey_4.txt";
REQUIRE(!kapi::filesystem::open(new_file_path));
REQUIRE(kapi::filesystem::create(new_file_path));
auto fd = kapi::filesystem::open(new_file_path);
REQUIRE(fd);
REQUIRE(kapi::filesystem::close(*fd));
REQUIRE(kapi::filesystem::umount("/information"));
}
}
}
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