/* Copyright (c) Advanced Micro Devices, Inc. All rights reserved.
 *
 * SPDX-License-Identifier: MIT
 */

#include "context.h"
#include "file.h"
#include "hipfile.h"
#include "hipfile-test.h"
#include "hipfile-warnings.h"
#include "invalid-enum.h"
#include "msys.h"
#include "mmountinfo.h"
#include "mountinfo.h"
#include "state.h"

#include <cerrno>
#include <cstring>
#include <fcntl.h>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <linux/stat.h>
#include <memory>
#include <optional>
#include <stdexcept>
#include <sys/eventfd.h>
#include <system_error>

using namespace hipFile;
using namespace testing;
using namespace std;

// Put tests inside the macros to suppress the global constructor
// warnings
HIPFILE_WARN_NO_GLOBAL_CTOR_OFF

struct ExpectUnregisteredFile;

struct ExpectUnregisteredFileBuilder {
    MSys                  &m_msys;
    MLibMountHelper       &m_mlibmounthelper;
    optional<struct statx> m_statx;
    optional<int>          m_fd_flags;
    optional<MountInfo>    m_mountinfo;
    optional<int>          m_open_fd;
    optional<int>          m_open_flags;
    optional<int>          m_open_throws;

    ExpectUnregisteredFileBuilder(MSys &msys, MLibMountHelper &mlibmounthelper)
        : m_msys(msys), m_mlibmounthelper(mlibmounthelper)
    {
    }

    ExpectUnregisteredFileBuilder &statx(const struct statx &statxbuf)
    {
        m_statx = statxbuf;
        return *this;
    }

    ExpectUnregisteredFileBuilder &fd_flags(int flags)
    {
        m_fd_flags = flags;
        return *this;
    }

    ExpectUnregisteredFileBuilder &mountinfo(const MountInfo &mountinfo)
    {
        m_mountinfo = mountinfo;
        return *this;
    }

    ExpectUnregisteredFileBuilder &open_fd(int fd)
    {
        if (m_open_throws) {
            throw "Cannot specify both open_throws(...) and open_fd(...)";
        }
        m_open_fd = fd;
        return *this;
    }

    ExpectUnregisteredFileBuilder &open_flags(int flags)
    {
        m_open_flags = flags;
        return *this;
    }

    ExpectUnregisteredFileBuilder &open_throws(int errno_)
    {
        if (m_open_fd) {
            throw "Cannot specify both open_throws(...) and open_fd(...)";
        }
        m_open_throws = errno_;
        return *this;
    }

    ExpectUnregisteredFile build();
};

struct ExpectUnregisteredFile {
    ExpectUnregisteredFile(const ExpectUnregisteredFileBuilder &builder)
    {
        if (builder.m_statx) {
            EXPECT_CALL(builder.m_msys, statx).WillOnce(Return(builder.m_statx.value()));
        }
        else {
            EXPECT_CALL(builder.m_msys, statx);
        }

        if (builder.m_fd_flags) {
            EXPECT_CALL(builder.m_msys, fcntl(_, F_GETFL, 0)).WillOnce(Return(builder.m_fd_flags.value()));
        }
        else {
            EXPECT_CALL(builder.m_msys, fcntl(_, F_GETFL, 0));
        }

        if (builder.m_mountinfo) {
            EXPECT_CALL(builder.m_mlibmounthelper, getMountInfo)
                .WillOnce(Return(builder.m_mountinfo.value()));
        }
        else {
            EXPECT_CALL(builder.m_mlibmounthelper, getMountInfo);
        }

        if (builder.m_open_throws && builder.m_open_flags) {
            EXPECT_CALL(builder.m_msys, open(_, builder.m_open_flags.value(), _))
                .WillOnce(Throw(std::system_error(builder.m_open_throws.value(), std::generic_category())));
        }
        else if (builder.m_open_throws) {
            EXPECT_CALL(builder.m_msys, open)
                .WillOnce(Throw(std::system_error(builder.m_open_throws.value(), std::generic_category())));
        }
        else if (builder.m_open_flags) {
            EXPECT_CALL(builder.m_msys, open(_, builder.m_open_flags.value(), _))
                .WillOnce(Return(builder.m_open_fd ? builder.m_open_fd.value() : -1));
        }
        else {
            EXPECT_CALL(builder.m_msys, open)
                .WillOnce(Return(builder.m_open_fd ? builder.m_open_fd.value() : -1));
        }
    }
};

ExpectUnregisteredFile
ExpectUnregisteredFileBuilder::build()
{
    return ExpectUnregisteredFile(*this);
}

void
expect_file_registration(MSys &msys, MLibMountHelper &mlibmounthelper)
{
    ExpectUnregisteredFileBuilder(msys, mlibmounthelper).build();
}

struct HipFileHandle : public HipFileOpened {
    StrictMock<MSys>            msys;
    StrictMock<MLibMountHelper> mlibmounthelper;
};

TEST_F(HipFileHandle, register_handle_internal_linux_fd)
{
    int fd{0xBADF00D};

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper).build();
    ASSERT_NE(Context<DriverState>::get()->registerFile(fd), nullptr);
}

TEST_F(HipFileHandle, file_initialization)
{
    int          fd{0x12345678};
    int          fd_flags{~O_DIRECT}; // All flags, except O_DIRECT, set
    struct statx stxbuf {};
#if defined(STATX_DIOALIGN)
    stxbuf.stx_mask             = STATX_TYPE | STATX_MODE | STATX_DIOALIGN;
    stxbuf.stx_dio_mem_align    = 4;
    stxbuf.stx_dio_offset_align = 512;
#else
    stxbuf.stx_mask = STATX_TYPE | STATX_MODE;
#endif
    stxbuf.stx_mode = S_IFREG;

    // In this test, the registered file is destroyed _after_ the mocks are
    // destroyed. Use an eventfd so that when FileDescriptor calls close, it
    // has a valid file descriptor to close.
    int open_fd{eventfd(0, 0)};
    ASSERT_NE(open_fd, -1);

    MountInfo mountinfo{};
    mountinfo.type                         = FilesystemType::ext4;
    mountinfo.options.ext4.journaling_mode = ExtJournalingMode::ordered;

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .statx(stxbuf)
        .fd_flags(fd_flags)
        .mountinfo(mountinfo)
        .open_fd(open_fd)
        .build();
    auto fh{Context<DriverState>::get()->registerFile(fd)};
    auto file{Context<DriverState>::get()->getFile(fh)};

    EXPECT_EQ(fh, file->handle());
    EXPECT_EQ(fd, file->clientFd());
    EXPECT_EQ(fd, file->bufferedFd());
    EXPECT_EQ(open_fd, file->unbufferedFd());
#if defined(STATX_DIOALIGN)
    EXPECT_EQ(file->dioMemAlign(), stxbuf.stx_dio_mem_align);
    EXPECT_EQ(file->dioOffsetAlign(), stxbuf.stx_dio_offset_align);
#else
    EXPECT_EQ(file->dioMemAlign(), 4096);
    EXPECT_EQ(file->dioOffsetAlign(), 4096);
#endif
    EXPECT_FALSE(file->isBlockDevice());
    EXPECT_TRUE(file->isRegularFile());
    EXPECT_TRUE(file->onExt4Ordered());
    EXPECT_FALSE(file->onXfs());
}

TEST_F(HipFileHandle, register_handle_internal_linux_fd_already_registered)
{
    int fd{0xBADF00D};
    ExpectUnregisteredFileBuilder(msys, mlibmounthelper).build();
    ASSERT_NE(Context<DriverState>::get()->registerFile(fd), nullptr);
    ExpectUnregisteredFileBuilder(msys, mlibmounthelper).build();
    ASSERT_THROW(Context<DriverState>::get()->registerFile(fd), FileAlreadyRegistered);
}

TEST_F(HipFileHandle, register_handle_linux_fd)
{
    hipFileHandle_t fh{};
    hipFileDescr_t  rfd{};

    rfd.type      = hipFileHandleTypeOpaqueFD;
    rfd.handle.fd = 0xBADF00D;

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper).build();
    ASSERT_EQ(hipFileHandleRegister(&fh, &rfd), HIPFILE_SUCCESS);
    ASSERT_NE(fh, nullptr);
}

// If statx() fails during file registration return hipfileInternalError
TEST_F(HipFileHandle, RocfileHandleRegisterStatxError)
{
    hipFileHandle_t fh{};
    hipFileDescr_t  rfd{};
    rfd.type      = hipFileHandleTypeOpaqueFD;
    rfd.handle.fd = 0xBADF00D;

    EXPECT_CALL(msys, statx).WillOnce(Throw(std::system_error(EBADF, std::generic_category())));

    ASSERT_EQ(hipFileHandleRegister(&fh, &rfd), HipFileOpError(hipFileInternalError));
}

// If the fcntl() fails during file registration return hipfileInternalError
TEST_F(HipFileHandle, RocfileHandleRegisterFcntlError)
{
    hipFileHandle_t fh{};
    hipFileDescr_t  rfd{};
    rfd.type      = hipFileHandleTypeOpaqueFD;
    rfd.handle.fd = 0xBADF00D;

    EXPECT_CALL(msys, statx);
    EXPECT_CALL(msys, fcntl).WillOnce(Throw(std::system_error(EBADF, std::generic_category())));

    ASSERT_EQ(hipFileHandleRegister(&fh, &rfd), HipFileOpError(hipFileInternalError));
}

// If getting mount information fails during file registration return hipfileInternalError
TEST_F(HipFileHandle, RocfileHandleRegisterLibMountError)
{
    hipFileHandle_t fh{};
    hipFileDescr_t  rfd{};
    rfd.type      = hipFileHandleTypeOpaqueFD;
    rfd.handle.fd = 0xBADF00D;

    EXPECT_CALL(msys, statx);
    EXPECT_CALL(msys, fcntl);
    EXPECT_CALL(mlibmounthelper, getMountInfo).WillOnce(Throw(std::runtime_error("error from test")));

    ASSERT_EQ(hipFileHandleRegister(&fh, &rfd), HipFileOpError(hipFileInternalError));
}

TEST_F(HipFileHandle, register_handle_linux_fd_already_registered)
{
    hipFileHandle_t fh{};
    hipFileDescr_t  rfd{};

    rfd.type      = hipFileHandleTypeOpaqueFD;
    rfd.handle.fd = 0xBADF00D;

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper).build();
    ASSERT_EQ(hipFileHandleRegister(&fh, &rfd), HIPFILE_SUCCESS);
    ASSERT_NE(fh, nullptr);
    ExpectUnregisteredFileBuilder(msys, mlibmounthelper).build();
    ASSERT_EQ(hipFileHandleRegister(&fh, &rfd), HipFileOpError(hipFileHandleAlreadyRegistered));
}

TEST_F(HipFileHandle, register_handle_windows_handle_not_supported)
{
    hipFileHandle_t fh{};
    hipFileDescr_t  rfd{};

    rfd.type      = hipFileHandleTypeOpaqueWin32;
    rfd.handle.fd = 0xBADF00D;

    ASSERT_EQ(hipFileHandleRegister(&fh, &rfd), HipFileOpError(hipFileIONotSupported));
}

TEST_F(HipFileHandle, register_handle_userspace_fs_not_supported)
{
    hipFileHandle_t fh{};
    hipFileDescr_t  rfd{};

    rfd.type      = hipFileHandleTypeUserspaceFS;
    rfd.handle.fd = 0xBADF00D;

    ASSERT_EQ(hipFileHandleRegister(&fh, &rfd), HipFileOpError(hipFileIONotSupported));
}

// A type outside the enum's valid range must be rejected, not crash or invoke
// undefined behavior when loaded.
TEST_F(HipFileHandle, register_handle_invalid_type_not_supported)
{
    hipFileHandle_t fh{};
    hipFileDescr_t  rfd{};

    rfd.type      = invalidEnum<hipFileFileHandleType_t>(maxEnum<hipFileFileHandleType_t>());
    rfd.handle.fd = 0xBADF00D;

    ASSERT_EQ(hipFileHandleRegister(&fh, &rfd), HipFileOpError(hipFileIONotSupported));
}

TEST_F(HipFileHandle, deregister_handle_internal_throws_if_not_registered)
{
    ASSERT_THROW(Context<DriverState>::get()->deregisterFile(reinterpret_cast<hipFileHandle_t>(0xdeadbeef)),
                 FileNotRegistered);
}

TEST_F(HipFileHandle, deregister_handle_doesnt_throw_if_not_registered)
{
    hipFileHandleDeregister(reinterpret_cast<hipFileHandle_t>(0xdeadbeef));
}

TEST_F(HipFileHandle, deregister_handle_internal)
{
    ExpectUnregisteredFileBuilder(msys, mlibmounthelper).build();
    auto fh = Context<DriverState>::get()->registerFile(0xBADF00D);
    Context<DriverState>::get()->deregisterFile(fh);
    ASSERT_THROW(Context<DriverState>::get()->deregisterFile(fh), FileNotRegistered);
}

TEST_F(HipFileHandle, deregister_handle)
{
    hipFileHandle_t fh{};
    hipFileDescr_t  rfd{};

    rfd.type      = hipFileHandleTypeOpaqueFD;
    rfd.handle.fd = 0xBADF00D;

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper).build();
    ASSERT_EQ(hipFileHandleRegister(&fh, &rfd), HIPFILE_SUCCESS);
    hipFileHandleDeregister(fh);
    hipFileHandleDeregister(fh);
}

TEST_F(HipFileHandle, deregister_handle_internal_fails_when_operations_are_oustanding)
{
    ExpectUnregisteredFileBuilder(msys, mlibmounthelper).build();
    auto fh = Context<DriverState>::get()->registerFile(0xBADF00D);
    {
        auto file = Context<DriverState>::get()->getFile(fh);
        ASSERT_THROW(Context<DriverState>::get()->deregisterFile(fh), FileOperationsOutstanding);
    }
    Context<DriverState>::get()->deregisterFile(fh);
}

TEST_F(HipFileHandle, deregister_handle_fails_when_operations_are_oustanding)
{
    hipFileHandle_t fh{};
    hipFileDescr_t  rfd{};

    rfd.type      = hipFileHandleTypeOpaqueFD;
    rfd.handle.fd = 0xBADF00D;

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper).build();
    ASSERT_EQ(hipFileHandleRegister(&fh, &rfd), HIPFILE_SUCCESS);
    {
        auto file = Context<DriverState>::get()->getFile(fh);
        hipFileHandleDeregister(fh);
    }
    hipFileHandleDeregister(fh);
}

TEST_F(HipFileHandle, UnregisteredFileCreatesOpensBufferedIfClientFdIsUnbuffered)
{
    int open_fd{888888};

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .fd_flags(~0) // All flags, including O_DIRECT, set
        .open_fd(open_fd)
        .open_flags(~O_DIRECT) // All flags, excluding O_DIRECT, set
        .build();

    UnregisteredFile uf{777777};

    EXPECT_CALL(msys, close(open_fd));
}

TEST_F(HipFileHandle, UnregisteredFileSetsCloseOnExecOnOpenedFile)
{
    int open_fd{888888};

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .fd_flags(0)
        .open_fd(open_fd)
        .open_flags(O_DIRECT | O_CLOEXEC)
        .build();

    UnregisteredFile uf{777777};

    EXPECT_CALL(msys, close(open_fd));
}

TEST_F(HipFileHandle, UnregisteredFileMaintainsCloseOnExecOnOpenedFile)
{
    int open_fd{888888};

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .fd_flags(O_DIRECT | O_CLOEXEC)
        .open_fd(open_fd)
        .open_flags(O_CLOEXEC)
        .build();

    UnregisteredFile uf{777777};

    EXPECT_CALL(msys, close(open_fd));
}

TEST_F(HipFileHandle, UnregisteredFileOpensUnbufferedIfClientFdIsBuffered)
{
    int open_fd{888888};

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .fd_flags(~O_DIRECT) // All flags, excluding O_DIRECT, set
        .open_fd(open_fd)
        .open_flags(~0) // All flags, including O_DIRECT, set
        .build();

    UnregisteredFile uf{777777};

    EXPECT_CALL(msys, close(open_fd));
}

TEST_F(HipFileHandle, UnregisteredFileClosesOpenedFileWhenDestroyed)
{
    int open_fd{888888};
    ExpectUnregisteredFileBuilder(msys, mlibmounthelper).open_fd(open_fd).build();
    UnregisteredFile uf{777777};
    EXPECT_CALL(msys, close(open_fd));
}

TEST_F(HipFileHandle, UnregisteredFilesUnbufferedFdIsNulloptIfOpenThrowsEinval)
{
    ExpectUnregisteredFileBuilder(msys, mlibmounthelper).fd_flags(~O_DIRECT).open_throws(EINVAL).build();
    UnregisteredFile uf{777777};
    ASSERT_EQ(uf.unbuffered_fd, nullopt);
}

TEST_F(HipFileHandle, UnregisteredFileConstructorThrowsOnErrOtherThanEinval)
{
    ExpectUnregisteredFileBuilder(msys, mlibmounthelper).fd_flags(~O_DIRECT).open_throws(EPERM).build();
    ASSERT_THROW(UnregisteredFile{777777}, std::system_error);
}

#if defined(STATX_DIOALIGN)
TEST_F(HipFileHandle, UnregisteredFileDioMemAlignMatchesStatxDioMemAlign)
{
    int          open_fd{888888};
    struct statx stxbuf {};
    stxbuf.stx_mask          = STATX_TYPE | STATX_MODE | STATX_DIOALIGN;
    stxbuf.stx_dio_mem_align = 1234;
    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .fd_flags(O_DIRECT)
        .open_fd(open_fd)
        .statx(stxbuf)
        .build();
    UnregisteredFile uf{777777};
    ASSERT_EQ(uf.m_dio_mem_align, 1234);

    EXPECT_CALL(msys, close(open_fd));
}
#endif

#if defined(STATX_DIOALIGN)
TEST_F(HipFileHandle, UnregisteredFileDioOffsetAlignMatchesStatxDioOffsetAlign)
{
    int          open_fd{888888};
    struct statx stxbuf {};
    stxbuf.stx_mask             = STATX_TYPE | STATX_MODE | STATX_DIOALIGN;
    stxbuf.stx_dio_offset_align = 1234;
    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .fd_flags(O_DIRECT)
        .open_fd(open_fd)
        .statx(stxbuf)
        .build();
    UnregisteredFile uf{777777};
    ASSERT_EQ(uf.m_dio_offset_align, 1234);

    EXPECT_CALL(msys, close(open_fd));
}
#endif

TEST_F(HipFileHandle, UnregisteredFileDioMemAlignIsPageSizeIfStatxDoesntHaveDioAlign)
{
    int          open_fd{888888};
    struct statx stxbuf {};
    stxbuf.stx_mask = STATX_TYPE | STATX_MODE;
    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .fd_flags(O_DIRECT)
        .open_fd(open_fd)
        .statx(stxbuf)
        .build();
    UnregisteredFile uf{777777};
    ASSERT_EQ(uf.m_dio_mem_align, 4096);

    EXPECT_CALL(msys, close(open_fd));
}

TEST_F(HipFileHandle, UnregisteredFileDioOffsetAlignIsPageSizeIfStatxDoesntHaveDioAlign)
{
    int          open_fd{888888};
    struct statx stxbuf {};
    stxbuf.stx_mask = STATX_TYPE | STATX_MODE;
    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .fd_flags(O_DIRECT)
        .open_fd(open_fd)
        .statx(stxbuf)
        .build();
    UnregisteredFile uf{777777};
    ASSERT_EQ(uf.m_dio_offset_align, 4096);

    EXPECT_CALL(msys, close(open_fd));
}

TEST_F(HipFileHandle, UnregisteredFileDioMemAlignIsZeroIfUnableToOpenUnbufferedFd)
{
    ExpectUnregisteredFileBuilder(msys, mlibmounthelper).fd_flags(~O_DIRECT).open_throws(EINVAL).build();
    UnregisteredFile uf{777777};
    ASSERT_EQ(uf.m_dio_mem_align, 0);
}

TEST_F(HipFileHandle, UnregisteredFileDioOffsetAlignIsZeroIfUnableToOpenUnbufferedFd)
{
    ExpectUnregisteredFileBuilder(msys, mlibmounthelper).fd_flags(~O_DIRECT).open_throws(EINVAL).build();
    UnregisteredFile uf{777777};
    ASSERT_EQ(uf.m_dio_offset_align, 0);
}

TEST_F(HipFileHandle, IsBlockDeviceReturnsTrueForBlockDevice)
{
    int          fd{0xBADF00D};
    struct statx stxbuf {};
    stxbuf.stx_mask = STATX_TYPE;
    stxbuf.stx_mode = S_IFBLK;

    // Return an eventfd as the file descriptor for the bufferd fd open so that when
    // FileDescriptor calls close, it has a valid file descriptor to close.
    int open_fd{eventfd(0, 0)};
    ASSERT_NE(open_fd, -1);

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .fd_flags(O_DIRECT)
        .statx(stxbuf)
        .open_fd(open_fd)
        .build();
    auto fh{Context<DriverState>::get()->registerFile(fd)};
    auto file{Context<DriverState>::get()->getFile(fh)};

    EXPECT_TRUE(file->isBlockDevice());
}

TEST_F(HipFileHandle, IsBlockDeviceReturnsFalseForRegularFile)
{
    int          fd{0xBADF00D};
    struct statx stxbuf {};
    stxbuf.stx_mask = STATX_TYPE;
    stxbuf.stx_mode = S_IFREG;

    // Return an eventfd as the file descriptor for the bufferd fd open so that when
    // FileDescriptor calls close, it has a valid file descriptor to close.
    int open_fd{eventfd(0, 0)};
    ASSERT_NE(open_fd, -1);

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .fd_flags(O_DIRECT)
        .statx(stxbuf)
        .open_fd(open_fd)
        .build();
    auto fh{Context<DriverState>::get()->registerFile(fd)};
    auto file{Context<DriverState>::get()->getFile(fh)};

    EXPECT_FALSE(file->isBlockDevice());
}

TEST_F(HipFileHandle, IsBlockDeviceReturnsFalseWhenStatxTypeNotAvailable)
{
    int          fd{0xBADF00D};
    struct statx stxbuf {};
    stxbuf.stx_mask = 0;
    stxbuf.stx_mode = S_IFBLK;

    // Return an eventfd as the file descriptor for the bufferd fd open so that when
    // FileDescriptor calls close, it has a valid file descriptor to close.
    int open_fd{eventfd(0, 0)};
    ASSERT_NE(open_fd, -1);

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .fd_flags(O_DIRECT)
        .statx(stxbuf)
        .open_fd(open_fd)
        .build();
    auto fh{Context<DriverState>::get()->registerFile(fd)};
    auto file{Context<DriverState>::get()->getFile(fh)};

    EXPECT_FALSE(file->isBlockDevice());
}

TEST_F(HipFileHandle, IsRegularFileReturnsTrueForRegularFile)
{
    int          fd{0xBADF00D};
    struct statx stxbuf {};
    stxbuf.stx_mask = STATX_TYPE;
    stxbuf.stx_mode = S_IFREG;

    // Return an eventfd as the file descriptor for the bufferd fd open so that when
    // FileDescriptor calls close, it has a valid file descriptor to close.
    int open_fd{eventfd(0, 0)};
    ASSERT_NE(open_fd, -1);

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .fd_flags(O_DIRECT)
        .statx(stxbuf)
        .open_fd(open_fd)
        .build();
    auto fh{Context<DriverState>::get()->registerFile(fd)};
    auto file{Context<DriverState>::get()->getFile(fh)};

    EXPECT_TRUE(file->isRegularFile());
}

TEST_F(HipFileHandle, IsRegularFileReturnsFalseForBlockDevice)
{
    int          fd{0xBADF00D};
    struct statx stxbuf {};
    stxbuf.stx_mask = STATX_TYPE;
    stxbuf.stx_mode = S_IFBLK;

    // Return an eventfd as the file descriptor for the bufferd fd open so that when
    // FileDescriptor calls close, it has a valid file descriptor to close.
    int open_fd{eventfd(0, 0)};
    ASSERT_NE(open_fd, -1);

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .fd_flags(O_DIRECT)
        .statx(stxbuf)
        .open_fd(open_fd)
        .build();
    auto fh{Context<DriverState>::get()->registerFile(fd)};
    auto file{Context<DriverState>::get()->getFile(fh)};

    EXPECT_FALSE(file->isRegularFile());
}

TEST_F(HipFileHandle, IsRegularFileReturnsFalseWhenStatxTypeNotAvailable)
{
    int          fd{0xBADF00D};
    struct statx stxbuf {};
    stxbuf.stx_mask = 0;
    stxbuf.stx_mode = S_IFBLK;

    // Return an eventfd as the file descriptor for the bufferd fd open so that when
    // FileDescriptor calls close, it has a valid file descriptor to close.
    int open_fd{eventfd(0, 0)};
    ASSERT_NE(open_fd, -1);

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .fd_flags(O_DIRECT)
        .statx(stxbuf)
        .open_fd(open_fd)
        .build();
    auto fh{Context<DriverState>::get()->registerFile(fd)};
    auto file{Context<DriverState>::get()->getFile(fh)};

    EXPECT_FALSE(file->isRegularFile());
}

TEST_F(HipFileHandle, OnExt4OrderedReturnsTrueForExt4Ordered)
{
    int fd{0xBADF00D};

    // Return an eventfd as the file descriptor for the bufferd fd open so that when
    // FileDescriptor calls close, it has a valid file descriptor to close.
    int open_fd{eventfd(0, 0)};
    ASSERT_NE(open_fd, -1);

    MountInfo mountinfo{};
    mountinfo.type                         = FilesystemType::ext4;
    mountinfo.options.ext4.journaling_mode = ExtJournalingMode::ordered;

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .fd_flags(O_DIRECT)
        .mountinfo(mountinfo)
        .open_fd(open_fd)
        .build();
    auto fh{Context<DriverState>::get()->registerFile(fd)};
    auto file{Context<DriverState>::get()->getFile(fh)};

    EXPECT_TRUE(file->onExt4Ordered());
}

TEST_F(HipFileHandle, OnExt4OrderedReturnsFalseForExt4Journal)
{
    int fd{0xBADF00D};

    // Return an eventfd as the file descriptor for the bufferd fd open so that when
    // FileDescriptor calls close, it has a valid file descriptor to close.
    int open_fd{eventfd(0, 0)};
    ASSERT_NE(open_fd, -1);

    MountInfo mountinfo{};
    mountinfo.type                         = FilesystemType::ext4;
    mountinfo.options.ext4.journaling_mode = ExtJournalingMode::journal;

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .fd_flags(O_DIRECT)
        .mountinfo(mountinfo)
        .open_fd(open_fd)
        .build();
    auto fh{Context<DriverState>::get()->registerFile(fd)};
    auto file{Context<DriverState>::get()->getFile(fh)};

    EXPECT_FALSE(file->onExt4Ordered());
}

TEST_F(HipFileHandle, OnExt4OrderedReturnsFalseForOtherFileSystem)
{
    int fd{0xBADF00D};

    // Return an eventfd as the file descriptor for the bufferd fd open so that when
    // FileDescriptor calls close, it has a valid file descriptor to close.
    int open_fd{eventfd(0, 0)};
    ASSERT_NE(open_fd, -1);

    MountInfo mountinfo{};
    mountinfo.type = FilesystemType::other;

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .fd_flags(O_DIRECT)
        .mountinfo(mountinfo)
        .open_fd(open_fd)
        .build();
    auto fh{Context<DriverState>::get()->registerFile(fd)};
    auto file{Context<DriverState>::get()->getFile(fh)};

    EXPECT_FALSE(file->onExt4Ordered());
}

TEST_F(HipFileHandle, OnXfsReturnsTrueForXfs)
{
    int fd{0xBADF00D};

    // Return an eventfd as the file descriptor for the bufferd fd open so that when
    // FileDescriptor calls close, it has a valid file descriptor to close.
    int open_fd{eventfd(0, 0)};
    ASSERT_NE(open_fd, -1);

    MountInfo mountinfo{};
    mountinfo.type = FilesystemType::xfs;

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .fd_flags(O_DIRECT)
        .mountinfo(mountinfo)
        .open_fd(open_fd)
        .build();
    auto fh{Context<DriverState>::get()->registerFile(fd)};
    auto file{Context<DriverState>::get()->getFile(fh)};

    EXPECT_TRUE(file->onXfs());
}

TEST_F(HipFileHandle, OnXfsReturnsFalseForOtherFileSystem)
{
    int fd{0xBADF00D};

    // Return an eventfd as the file descriptor for the bufferd fd open so that when
    // FileDescriptor calls close, it has a valid file descriptor to close.
    int open_fd{eventfd(0, 0)};
    ASSERT_NE(open_fd, -1);

    MountInfo mountinfo{};
    mountinfo.type = FilesystemType::other;

    ExpectUnregisteredFileBuilder(msys, mlibmounthelper)
        .fd_flags(O_DIRECT)
        .mountinfo(mountinfo)
        .open_fd(open_fd)
        .build();
    auto fh{Context<DriverState>::get()->registerFile(fd)};
    auto file{Context<DriverState>::get()->getFile(fh)};

    EXPECT_FALSE(file->onXfs());
}

HIPFILE_WARN_NO_GLOBAL_CTOR_ON