/*
 * Copyright (c) 2023, Liav A. <liavalb@hotmail.co.il>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <Kernel/FileSystem/SysFS/Subsystems/Kernel/RequestPanic.h>
#include <Kernel/Library/Panic.h>
#include <Kernel/Security/Jail.h>
#include <Kernel/Tasks/Process.h>

namespace Kernel {

UNMAP_AFTER_INIT NonnullRefPtr<SysFSSystemRequestPanic> SysFSSystemRequestPanic::must_create(SysFSDirectory const& parent_directory)
{
    return adopt_ref_if_nonnull(new (nothrow) SysFSSystemRequestPanic(parent_directory)).release_nonnull();
}

static ErrorOr<void> check_current_process_not_jailed()
{
    return Process::current().jail().with([&](auto const& my_jail) -> ErrorOr<void> {
        if (my_jail)
            return Error::from_errno(EPERM);
        return {};
    });
}

ErrorOr<size_t> SysFSSystemRequestPanic::read_bytes(off_t, size_t, UserOrKernelBuffer&, OpenFileDescription*) const
{
    TRY(check_current_process_not_jailed());
    return Error::from_errno(ENOTSUP);
}

ErrorOr<size_t> SysFSSystemRequestPanic::write_bytes(off_t, size_t, UserOrKernelBuffer const&, OpenFileDescription*)
{
    TRY(check_current_process_not_jailed());
    PANIC("SysFSSystemRequestPanic::write_bytes");
    VERIFY_NOT_REACHED();
}

ErrorOr<void> SysFSSystemRequestPanic::truncate(u64)
{
    TRY(check_current_process_not_jailed());
    PANIC("SysFSSystemRequestPanic::truncate");
    VERIFY_NOT_REACHED();
}

}