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9201a06027
Before we start disabling acquisition of the big process lock for specific syscalls, make sure to document and assert that all the lock is held during all syscalls.
28 lines
885 B
C++
28 lines
885 B
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/StringView.h>
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#include <Kernel/FileSystem/VirtualFileSystem.h>
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#include <Kernel/Process.h>
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namespace Kernel {
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KResultOr<FlatPtr> Process::sys$mknod(Userspace<const Syscall::SC_mknod_params*> user_params)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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REQUIRE_PROMISE(dpath);
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Syscall::SC_mknod_params params;
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if (!copy_from_user(¶ms, user_params))
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return EFAULT;
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if (!is_superuser() && !is_regular_file(params.mode) && !is_fifo(params.mode) && !is_socket(params.mode))
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return EPERM;
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auto path = get_syscall_path_argument(params.path);
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if (path.is_error())
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return path.error();
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return VirtualFileSystem::the().mknod(path.value()->view(), params.mode & ~umask(), params.dev, current_directory());
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}
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}
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