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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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5
Kernel/Socket.h
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@ -14,7 +14,6 @@ public:
static RetainPtr<Socket> create(int domain, int type, int protocol, int& error);
virtual ~Socket();
bool is_listening() const { return m_listening; }
int domain() const { return m_domain; }
int type() const { return m_type; }
int protocol() const { return m_protocol; }
@ -28,7 +27,8 @@ public:
virtual bool connect(const sockaddr*, socklen_t, int& error) = 0;
virtual bool get_address(sockaddr*, socklen_t*) = 0;
virtual bool is_local() const { return false; }
virtual void close(SocketRole) = 0;
virtual void attach_fd(SocketRole) = 0;
virtual void detach_fd(SocketRole) = 0;
virtual bool can_read(SocketRole) const = 0;
virtual ssize_t read(SocketRole, byte*, size_t) = 0;
virtual ssize_t write(SocketRole, const byte*, size_t) = 0;
@ -48,7 +48,6 @@ private:
int m_type { 0 };
int m_protocol { 0 };
int m_backlog { 0 };
bool m_listening { false };
bool m_connected { false };
Vector<RetainPtr<Socket>> m_pending;