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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.
46 lines
1.4 KiB
C++
46 lines
1.4 KiB
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$link(Userspace<const Syscall::SC_link_params*> user_params)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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REQUIRE_PROMISE(cpath);
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Syscall::SC_link_params params;
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if (!copy_from_user(¶ms, user_params))
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return EFAULT;
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auto old_path = copy_string_from_user(params.old_path);
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if (old_path.is_null())
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return EFAULT;
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auto new_path = copy_string_from_user(params.new_path);
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if (new_path.is_null())
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return EFAULT;
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return VirtualFileSystem::the().link(old_path, new_path, current_directory());
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}
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KResultOr<FlatPtr> Process::sys$symlink(Userspace<const Syscall::SC_symlink_params*> user_params)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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REQUIRE_PROMISE(cpath);
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Syscall::SC_symlink_params params;
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if (!copy_from_user(¶ms, user_params))
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return EFAULT;
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auto target = get_syscall_path_argument(params.target);
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if (target.is_error())
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return target.error();
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auto linkpath = get_syscall_path_argument(params.linkpath);
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if (linkpath.is_error())
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return linkpath.error();
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return VirtualFileSystem::the().symlink(target.value()->view(), linkpath.value()->view(), current_directory());
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}
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}
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