mirror of
https://github.com/Atmosphere-NX/Atmosphere
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kern/ipc: finish Receive part of ReplyAndReceive
This commit is contained in:
Michael Scire
parent
804aa0e55d
commit
9fa6d12586
3 changed files with 303 additions and 27 deletions
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@ -53,6 +53,7 @@ namespace ams::kern {
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void OnClientClosed();
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private:
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bool IsSignaledImpl() const;
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void CleanupRequests();
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};
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}
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@ -62,17 +62,65 @@ namespace ams::kern {
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void Initialize() { /* ... */ }
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void Finalize();
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size_t GetSendCount() const { return this->num_send; }
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size_t GetReceiveCount() const { return this->num_recv; }
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size_t GetExchangeCount() const { return this->num_exch; }
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constexpr size_t GetSendCount() const { return this->num_send; }
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constexpr size_t GetReceiveCount() const { return this->num_recv; }
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constexpr size_t GetExchangeCount() const { return this->num_exch; }
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Result PushSend(KProcessAddress client, KProcessAddress server, size_t size, KMemoryState state);
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Result PushReceive(KProcessAddress client, KProcessAddress server, size_t size, KMemoryState state);
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Result PushExchange(KProcessAddress client, KProcessAddress server, size_t size, KMemoryState state);
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/* TODO: More functionality. */
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constexpr KProcessAddress GetSendClientAddress(size_t i) const { return GetSendMapping(i).GetClientAddress(); }
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constexpr KProcessAddress GetSendServerAddress(size_t i) const { return GetSendMapping(i).GetServerAddress(); }
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constexpr size_t GetSendSize(size_t i) const { return GetSendMapping(i).GetSize(); }
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constexpr KMemoryState GetSendMemoryState(size_t i) const { return GetSendMapping(i).GetMemoryState(); }
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constexpr KProcessAddress GetReceiveClientAddress(size_t i) const { return GetReceiveMapping(i).GetClientAddress(); }
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constexpr KProcessAddress GetReceiveServerAddress(size_t i) const { return GetReceiveMapping(i).GetServerAddress(); }
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constexpr size_t GetReceiveSize(size_t i) const { return GetReceiveMapping(i).GetSize(); }
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constexpr KMemoryState GetReceiveMemoryState(size_t i) const { return GetReceiveMapping(i).GetMemoryState(); }
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constexpr KProcessAddress GetExchangeClientAddress(size_t i) const { return GetExchangeMapping(i).GetClientAddress(); }
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constexpr KProcessAddress GetExchangeServerAddress(size_t i) const { return GetExchangeMapping(i).GetServerAddress(); }
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constexpr size_t GetExchangeSize(size_t i) const { return GetExchangeMapping(i).GetSize(); }
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constexpr KMemoryState GetExchangeMemoryState(size_t i) const { return GetExchangeMapping(i).GetMemoryState(); }
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private:
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Result PushMap(KProcessAddress client, KProcessAddress server, size_t size, KMemoryState state, size_t index);
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constexpr const Mapping &GetSendMapping(size_t i) const {
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MESOSPHERE_ASSERT(i < this->num_send);
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const size_t index = i;
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if (index < NumStaticMappings) {
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return this->static_mappings[index];
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} else {
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return this->mappings[index - NumStaticMappings];
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}
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}
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constexpr const Mapping &GetReceiveMapping(size_t i) const {
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MESOSPHERE_ASSERT(i < this->num_recv);
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const size_t index = this->num_send + i;
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if (index < NumStaticMappings) {
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return this->static_mappings[index];
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} else {
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return this->mappings[index - NumStaticMappings];
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}
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}
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constexpr const Mapping &GetExchangeMapping(size_t i) const {
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MESOSPHERE_ASSERT(i < this->num_exch);
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const size_t index = this->num_send + this->num_recv + i;
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if (index < NumStaticMappings) {
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return this->static_mappings[index];
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} else {
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return this->mappings[index - NumStaticMappings];
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}
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}
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};
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private:
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SessionMappings mappings;
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@ -128,23 +176,23 @@ namespace ams::kern {
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static void PostDestroy(uintptr_t arg) { /* ... */ }
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KThread *GetThread() const { return this->thread; }
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KWritableEvent *GetEvent() const { return this->event; }
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uintptr_t GetAddress() const { return this->address; }
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size_t GetSize() const { return this->size; }
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KProcess *GetServerProcess() const { return this->server; }
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constexpr KThread *GetThread() const { return this->thread; }
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constexpr KWritableEvent *GetEvent() const { return this->event; }
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constexpr uintptr_t GetAddress() const { return this->address; }
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constexpr size_t GetSize() const { return this->size; }
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constexpr KProcess *GetServerProcess() const { return this->server; }
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void SetServerProcess(KProcess *process) {
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this->server = process;
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this->server->Open();
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}
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void ClearThread() { this->thread = nullptr; }
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void ClearEvent() { this->event = nullptr; }
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constexpr void ClearThread() { this->thread = nullptr; }
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constexpr void ClearEvent() { this->event = nullptr; }
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size_t GetSendCount() const { return this->mappings.GetSendCount(); }
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size_t GetReceiveCount() const { return this->mappings.GetReceiveCount(); }
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size_t GetExchangeCount() const { return this->mappings.GetExchangeCount(); }
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constexpr size_t GetSendCount() const { return this->mappings.GetSendCount(); }
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constexpr size_t GetReceiveCount() const { return this->mappings.GetReceiveCount(); }
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constexpr size_t GetExchangeCount() const { return this->mappings.GetExchangeCount(); }
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Result PushSend(KProcessAddress client, KProcessAddress server, size_t size, KMemoryState state) {
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return this->mappings.PushSend(client, server, size, state);
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@ -158,7 +206,20 @@ namespace ams::kern {
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return this->mappings.PushExchange(client, server, size, state);
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}
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/* TODO: More functionality. */
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constexpr KProcessAddress GetSendClientAddress(size_t i) const { return this->mappings.GetSendClientAddress(i); }
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constexpr KProcessAddress GetSendServerAddress(size_t i) const { return this->mappings.GetSendServerAddress(i); }
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constexpr size_t GetSendSize(size_t i) const { return this->mappings.GetSendSize(i); }
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constexpr KMemoryState GetSendMemoryState(size_t i) const { return this->mappings.GetSendMemoryState(i); }
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constexpr KProcessAddress GetReceiveClientAddress(size_t i) const { return this->mappings.GetReceiveClientAddress(i); }
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constexpr KProcessAddress GetReceiveServerAddress(size_t i) const { return this->mappings.GetReceiveServerAddress(i); }
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constexpr size_t GetReceiveSize(size_t i) const { return this->mappings.GetReceiveSize(i); }
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constexpr KMemoryState GetReceiveMemoryState(size_t i) const { return this->mappings.GetReceiveMemoryState(i); }
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constexpr KProcessAddress GetExchangeClientAddress(size_t i) const { return this->mappings.GetExchangeClientAddress(i); }
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constexpr KProcessAddress GetExchangeServerAddress(size_t i) const { return this->mappings.GetExchangeServerAddress(i); }
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constexpr size_t GetExchangeSize(size_t i) const { return this->mappings.GetExchangeSize(i); }
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constexpr KMemoryState GetExchangeMemoryState(size_t i) const { return this->mappings.GetExchangeMemoryState(i); }
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};
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}
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@ -251,6 +251,96 @@ namespace ams::kern {
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return ResultSuccess();
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}
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ALWAYS_INLINE void CleanupSpecialData(KProcess &dst_process, u32 *dst_msg_ptr, size_t dst_buffer_size) {
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/* Parse the message. */
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const ipc::MessageBuffer dst_msg(dst_msg_ptr, dst_buffer_size);
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const ipc::MessageBuffer::MessageHeader dst_header(dst_msg);
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const ipc::MessageBuffer::SpecialHeader dst_special_header(dst_msg, dst_header);
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/* Check that the size is big enough. */
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if (ipc::MessageBuffer::GetMessageBufferSize(dst_header, dst_special_header) > dst_buffer_size) {
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return;
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}
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/* Set the special header. */
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int offset = dst_msg.Set(dst_special_header);
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/* Clear the process id, if needed. */
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if (dst_special_header.GetHasProcessId()) {
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offset = dst_msg.SetProcessId(offset, 0);
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}
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/* Clear handles, as relevant. */
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auto &dst_handle_table = dst_process.GetHandleTable();
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for (auto i = 0; i < (dst_special_header.GetCopyHandleCount() + dst_special_header.GetMoveHandleCount()); ++i) {
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const ams::svc::Handle handle = dst_msg.GetHandle(offset);
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if (handle != ams::svc::InvalidHandle) {
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dst_handle_table.Remove(handle);
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}
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offset = dst_msg.SetHandle(offset, ams::svc::InvalidHandle);
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}
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}
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ALWAYS_INLINE Result CleanupServerMap(KSessionRequest *request, KProcess *server_process) {
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/* If there's no server process, there's nothing to clean up. */
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R_SUCCEED_IF(server_process == nullptr);
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/* Get the page table. */
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auto &server_page_table = server_process->GetPageTable();
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/* Cleanup Send mappings. */
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for (size_t i = 0; i < request->GetSendCount(); ++i) {
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R_TRY(server_page_table.CleanupForIpcServer(request->GetSendServerAddress(i), request->GetSendSize(i), request->GetSendMemoryState(i), server_process));
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}
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/* Cleanup Receive mappings. */
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for (size_t i = 0; i < request->GetReceiveCount(); ++i) {
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R_TRY(server_page_table.CleanupForIpcServer(request->GetReceiveServerAddress(i), request->GetReceiveSize(i), request->GetReceiveMemoryState(i), server_process));
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}
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/* Cleanup Exchange mappings. */
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for (size_t i = 0; i < request->GetExchangeCount(); ++i) {
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R_TRY(server_page_table.CleanupForIpcServer(request->GetExchangeServerAddress(i), request->GetExchangeSize(i), request->GetExchangeMemoryState(i), server_process));
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}
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return ResultSuccess();
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}
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ALWAYS_INLINE Result CleanupClientMap(KSessionRequest *request, KProcessPageTable *client_page_table) {
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/* If there's no client page table, there's nothing to clean up. */
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R_SUCCEED_IF(client_page_table == nullptr);
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/* Cleanup Send mappings. */
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for (size_t i = 0; i < request->GetSendCount(); ++i) {
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R_TRY(client_page_table->CleanupForIpcClient(request->GetSendServerAddress(i), request->GetSendSize(i), request->GetSendMemoryState(i)));
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}
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/* Cleanup Receive mappings. */
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for (size_t i = 0; i < request->GetReceiveCount(); ++i) {
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R_TRY(client_page_table->CleanupForIpcClient(request->GetReceiveServerAddress(i), request->GetReceiveSize(i), request->GetReceiveMemoryState(i)));
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}
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/* Cleanup Exchange mappings. */
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for (size_t i = 0; i < request->GetExchangeCount(); ++i) {
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R_TRY(client_page_table->CleanupForIpcClient(request->GetExchangeServerAddress(i), request->GetExchangeSize(i), request->GetExchangeMemoryState(i)));
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}
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return ResultSuccess();
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}
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ALWAYS_INLINE Result CleanupMap(KSessionRequest *request, KProcess *server_process, KProcessPageTable *client_page_table) {
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/* Cleanup the server map. */
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R_TRY(CleanupServerMap(request, server_process));
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/* Cleanup the client map. */
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R_TRY(CleanupClientMap(request, client_page_table));
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return ResultSuccess();
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}
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ALWAYS_INLINE Result ProcessReceiveMessageMapAliasDescriptors(int &offset, KProcessPageTable &dst_page_table, KProcessPageTable &src_page_table, const ipc::MessageBuffer &dst_msg, const ipc::MessageBuffer &src_msg, KSessionRequest *request, KMemoryPermission perm, bool send) {
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/* Get the offset at the start of processing. */
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const int cur_offset = offset;
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@ -380,8 +470,21 @@ namespace ams::kern {
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/* Set up a guard to make sure that we end up in a clean state on error. */
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auto cleanup_guard = SCOPE_GUARD {
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/* TODO */
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MESOSPHERE_UNIMPLEMENTED();
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/* Cleanup mappings. */
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CleanupMap(request, std::addressof(dst_process), std::addressof(src_page_table));
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/* Cleanup special data. */
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if (src_header.GetHasSpecialHeader()) {
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CleanupSpecialData(dst_process, dst_msg_ptr, dst_buffer_size);
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}
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/* Cleanup the header if the receive list isn't broken. */
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if (!recv_list_broken) {
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dst_msg.Set(dst_header);
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if (dst_header.GetHasSpecialHeader()) {
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dst_msg.Set(dst_special_header);
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}
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}
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};
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/* Process any special data. */
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@ -464,12 +567,6 @@ namespace ams::kern {
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}
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}
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/* TODO: Remove this when done, as these variables will be used by unimplemented stuff above. */
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static_cast<void>(dst_page_table);
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static_cast<void>(dst_user);
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static_cast<void>(src_user);
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static_cast<void>(pointer_key);
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/* We succeeded! */
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cleanup_guard.Cancel();
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return ResultSuccess();
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@ -495,7 +592,7 @@ namespace ams::kern {
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this->parent->OnServerClosed();
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/* TODO: this->CleanupRequests(); */
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this->CleanupRequests();
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this->parent->Close();
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}
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@ -543,8 +640,57 @@ namespace ams::kern {
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/* Handle cleanup on receive failure. */
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if (R_FAILED(result)) {
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/* TODO */
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MESOSPHERE_UNIMPLEMENTED();
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/* Cache the result to return it to the client. */
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const Result result_for_client = result;
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/* Clear the current request. */
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{
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KScopedSchedulerLock sl;
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MESOSPHERE_ASSERT(this->current_request == request);
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this->current_request = nullptr;
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if (!this->request_list.empty()) {
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this->NotifyAvailable();
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}
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}
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/* Reply to the client. */
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{
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/* After we reply, close our reference to the request. */
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ON_SCOPE_EXIT { request->Close(); };
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/* Get the event to check whether the request is async. */
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if (KWritableEvent *event = request->GetEvent(); event != nullptr) {
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/* The client sent an async request. */
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KProcess *client = client_thread->GetOwnerProcess();
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auto &client_pt = client->GetPageTable();
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/* Send the async result. */
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if (R_FAILED(result_for_client)) {
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ReplyAsyncError(client, client_message, client_buffer_size, result_for_client);
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}
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/* Unlock the client buffer. */
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/* NOTE: Nintendo does not check the result of this. */
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client_pt.UnlockForIpcUserBuffer(client_message, client_buffer_size);
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/* Signal the event. */
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event->Signal();
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} else {
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/* Set the thread as runnable. */
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KScopedSchedulerLock sl;
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if (client_thread->GetState() == KThread::ThreadState_Waiting) {
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client_thread->SetSyncedObject(nullptr, result_for_client);
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client_thread->SetState(KThread::ThreadState_Runnable);
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}
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}
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}
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/* Set the server result. */
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if (recv_list_broken) {
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return svc::ResultReceiveListBroken();
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} else {
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return svc::ResultNotFound();
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}
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}
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return result;
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@ -603,6 +749,74 @@ namespace ams::kern {
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return this->IsSignaledImpl();
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}
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void KServerSession::CleanupRequests() {
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MESOSPHERE_ASSERT_THIS();
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KScopedLightLock lk(this->lock);
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/* Clean up any pending requests. */
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while (true) {
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/* Get the next request. */
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KSessionRequest *request = nullptr;
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{
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KScopedSchedulerLock sl;
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if (this->current_request) {
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/* Choose the current request if we have one. */
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request = this->current_request;
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this->current_request = nullptr;
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} else if (!this->request_list.empty()) {
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/* Pop the request from the front of the list. */
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request = std::addressof(this->request_list.front());
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this->request_list.pop_front();
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}
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}
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/* If there's no request, we're done. */
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if (request == nullptr) {
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break;
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}
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/* Close a reference to the request once it's cleaned up. */
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ON_SCOPE_EXIT { request->Close(); };
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/* Extract relevant information from the request. */
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const uintptr_t client_message = request->GetAddress();
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const size_t client_buffer_size = request->GetSize();
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KThread *client_thread = request->GetThread();
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KWritableEvent *event = request->GetEvent();
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KProcess *server_process = request->GetServerProcess();
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KProcess *client_process = (client_thread != nullptr) ? client_thread->GetOwnerProcess() : nullptr;
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KProcessPageTable *client_page_table = (client_process != nullptr) ? std::addressof(client_process->GetPageTable()) : nullptr;
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/* Cleanup the mappings. */
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Result result = CleanupMap(request, server_process, client_page_table);
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/* If there's a client thread, update it. */
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if (client_thread != nullptr) {
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if (event != nullptr) {
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/* We need to reply async. */
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ReplyAsyncError(client_process, client_message, client_buffer_size, (R_SUCCEEDED(result) ? svc::ResultSessionClosed() : result));
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/* Unlock the client buffer. */
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/* NOTE: Nintendo does not check the result of this. */
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client_page_table->UnlockForIpcUserBuffer(client_message, client_buffer_size);
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/* Signal the event. */
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event->Signal();
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} else {
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/* Set the thread as runnable. */
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KScopedSchedulerLock sl;
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if (client_thread->GetState() == KThread::ThreadState_Waiting) {
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client_thread->SetSyncedObject(nullptr, (R_SUCCEEDED(result) ? svc::ResultSessionClosed() : result));
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client_thread->SetState(KThread::ThreadState_Runnable);
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}
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}
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}
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}
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}
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void KServerSession::OnClientClosed() {
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MESOSPHERE_ASSERT_THIS();
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@ -677,7 +891,7 @@ namespace ams::kern {
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MESOSPHERE_ASSERT(request->GetExchangeCount() == 0);
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/* Get the process and page table. */
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KProcess *client_process = thread->GetOwner();
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KProcess *client_process = thread->GetOwnerProcess();
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auto &client_pt = client_process->GetPageTable();
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/* Reply to the request. */
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Reference in a new issue