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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.
32 lines
898 B
C++
32 lines
898 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 <Kernel/FileSystem/FileDescription.h>
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#include <Kernel/Process.h>
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namespace Kernel {
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KResultOr<FlatPtr> Process::sys$get_dir_entries(int fd, Userspace<void*> user_buffer, size_t user_size)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
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REQUIRE_PROMISE(stdio);
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if (user_size > NumericLimits<ssize_t>::max())
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return EINVAL;
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auto description = fds().file_description(fd);
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if (!description)
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return EBADF;
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auto buffer = UserOrKernelBuffer::for_user_buffer(user_buffer, static_cast<size_t>(user_size));
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if (!buffer.has_value())
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return EFAULT;
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auto result = description->get_dir_entries(buffer.value(), user_size);
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if (result.is_error())
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return result.error();
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else
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return result.release_value();
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}
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}
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