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Kernel: Use non-locking {Nonnull,}RefPtr for OpenFileDescription

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This patch switches away from {Nonnull,}LockRefPtr to the non-locking
smart pointers throughout the kernel.

I've looked at the handful of places where these were being persisted
and I don't see any race situations.

Note that the process file descriptor table (Process::m_fds) was already
guarded via MutexProtected.
This commit is contained in:
Andreas Kling 2023-03-06 19:29:25 +01:00
parent 36b0ecfe9e
commit d1371d66f7
34 changed files with 82 additions and 80 deletions
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14
Kernel/Net/LocalSocket.cpp
View file

@ -472,8 +472,9 @@ ErrorOr<void> LocalSocket::chown(Credentials const& credentials, OpenFileDescrip
return {};
}
Vector<NonnullLockRefPtr<OpenFileDescription>>& LocalSocket::recvfd_queue_for(OpenFileDescription const& description)
Vector<NonnullRefPtr<OpenFileDescription>>& LocalSocket::recvfd_queue_for(OpenFileDescription const& description)
{
VERIFY(mutex().is_exclusively_locked_by_current_thread());
auto role = this->role(description);
if (role == Role::Connected)
return m_fds_for_client;
@ -482,8 +483,9 @@ Vector<NonnullLockRefPtr<OpenFileDescription>>& LocalSocket::recvfd_queue_for(Op
VERIFY_NOT_REACHED();
}
Vector<NonnullLockRefPtr<OpenFileDescription>>& LocalSocket::sendfd_queue_for(OpenFileDescription const& description)
Vector<NonnullRefPtr<OpenFileDescription>>& LocalSocket::sendfd_queue_for(OpenFileDescription const& description)
{
VERIFY(mutex().is_exclusively_locked_by_current_thread());
auto role = this->role(description);
if (role == Role::Connected)
return m_fds_for_server;
@ -492,7 +494,7 @@ Vector<NonnullLockRefPtr<OpenFileDescription>>& LocalSocket::sendfd_queue_for(Op
VERIFY_NOT_REACHED();
}
ErrorOr<void> LocalSocket::sendfd(OpenFileDescription const& socket_description, NonnullLockRefPtr<OpenFileDescription> passing_description)
ErrorOr<void> LocalSocket::sendfd(OpenFileDescription const& socket_description, NonnullRefPtr<OpenFileDescription> passing_description)
{
MutexLocker locker(mutex());
auto role = this->role(socket_description);
@ -506,7 +508,7 @@ ErrorOr<void> LocalSocket::sendfd(OpenFileDescription const& socket_description,
return {};
}
ErrorOr<NonnullLockRefPtr<OpenFileDescription>> LocalSocket::recvfd(OpenFileDescription const& socket_description)
ErrorOr<NonnullRefPtr<OpenFileDescription>> LocalSocket::recvfd(OpenFileDescription const& socket_description)
{
MutexLocker locker(mutex());
auto role = this->role(socket_description);
@ -520,10 +522,10 @@ ErrorOr<NonnullLockRefPtr<OpenFileDescription>> LocalSocket::recvfd(OpenFileDesc
return queue.take_first();
}
ErrorOr<Vector<NonnullLockRefPtr<OpenFileDescription>>> LocalSocket::recvfds(OpenFileDescription const& socket_description, int n)
ErrorOr<Vector<NonnullRefPtr<OpenFileDescription>>> LocalSocket::recvfds(OpenFileDescription const& socket_description, int n)
{
MutexLocker locker(mutex());
Vector<NonnullLockRefPtr<OpenFileDescription>> fds;
Vector<NonnullRefPtr<OpenFileDescription>> fds;
auto role = this->role(socket_description);
if (role != Role::Connected && role != Role::Accepted)

18
Kernel/Net/LocalSocket.h
View file

@ -15,8 +15,8 @@ namespace Kernel {
class OpenFileDescription;
struct SocketPair {
NonnullLockRefPtr<OpenFileDescription> description0;
NonnullLockRefPtr<OpenFileDescription> description1;
NonnullRefPtr<OpenFileDescription> description0;
NonnullRefPtr<OpenFileDescription> description1;
};
class LocalSocket final : public Socket {
@ -26,9 +26,9 @@ public:
static ErrorOr<SocketPair> try_create_connected_pair(int type);
virtual ~LocalSocket() override;
ErrorOr<void> sendfd(OpenFileDescription const& socket_description, NonnullLockRefPtr<OpenFileDescription> passing_description);
ErrorOr<NonnullLockRefPtr<OpenFileDescription>> recvfd(OpenFileDescription const& socket_description);
ErrorOr<Vector<NonnullLockRefPtr<OpenFileDescription>>> recvfds(OpenFileDescription const& socket_description, int n);
ErrorOr<void> sendfd(OpenFileDescription const& socket_description, NonnullRefPtr<OpenFileDescription> passing_description);
ErrorOr<NonnullRefPtr<OpenFileDescription>> recvfd(OpenFileDescription const& socket_description);
ErrorOr<Vector<NonnullRefPtr<OpenFileDescription>>> recvfds(OpenFileDescription const& socket_description, int n);
static void for_each(Function<void(LocalSocket const&)>);
static ErrorOr<void> try_for_each(Function<ErrorOr<void>(LocalSocket const&)>);
@ -60,8 +60,8 @@ private:
bool has_attached_peer(OpenFileDescription const&) const;
DoubleBuffer* receive_buffer_for(OpenFileDescription&);
DoubleBuffer* send_buffer_for(OpenFileDescription&);
Vector<NonnullLockRefPtr<OpenFileDescription>>& sendfd_queue_for(OpenFileDescription const&);
Vector<NonnullLockRefPtr<OpenFileDescription>>& recvfd_queue_for(OpenFileDescription const&);
Vector<NonnullRefPtr<OpenFileDescription>>& sendfd_queue_for(OpenFileDescription const&);
Vector<NonnullRefPtr<OpenFileDescription>>& recvfd_queue_for(OpenFileDescription const&);
void set_connect_side_role(Role connect_side_role, bool force_evaluate_block_conditions = false)
{
@ -101,8 +101,8 @@ private:
NonnullOwnPtr<DoubleBuffer> m_for_client;
NonnullOwnPtr<DoubleBuffer> m_for_server;
Vector<NonnullLockRefPtr<OpenFileDescription>> m_fds_for_client;
Vector<NonnullLockRefPtr<OpenFileDescription>> m_fds_for_server;
Vector<NonnullRefPtr<OpenFileDescription>> m_fds_for_client;
Vector<NonnullRefPtr<OpenFileDescription>> m_fds_for_server;
IntrusiveListNode<LocalSocket> m_list_node;