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Kernel: Give each FileDescriptor a chance to co-open sockets.

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Track how many fds are open for a socket's Accepted and Connected roles.
This allows fork() to clone a socket fd without a subsequent close() walking
all over the parent process's fd.
This commit is contained in:
Andreas Kling 2019-02-17 11:00:35 +01:00
parent b0be3299b5
commit d5f515cf6c
6 changed files with 51 additions and 27 deletions
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7
Kernel/LocalSocket.h
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@ -13,7 +13,8 @@ public:
virtual bool bind(const sockaddr*, socklen_t, int& error) override;
virtual bool connect(const sockaddr*, socklen_t, int& error) override;
virtual bool get_address(sockaddr*, socklen_t*) override;
virtual void close(SocketRole) override;
virtual void attach_fd(SocketRole) override;
virtual void detach_fd(SocketRole) override;
virtual bool can_read(SocketRole) const override;
virtual ssize_t read(SocketRole, byte*, size_t) override;
virtual ssize_t write(SocketRole, const byte*, size_t) override;
@ -27,8 +28,8 @@ private:
RetainPtr<LocalSocket> m_peer;
bool m_bound { false };
bool m_server_closed { false };
bool m_client_closed { false };
int m_accepted_fds_open { 0 };
int m_connected_fds_open { 0 };
sockaddr_un m_address;
DoubleBuffer m_for_client;