| // Copyright 2019 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SRC_LIB_STORAGE_VFS_CPP_TRACKED_REMOTE_DIR_H_ |
| #define SRC_LIB_STORAGE_VFS_CPP_TRACKED_REMOTE_DIR_H_ |
| |
| #include <fuchsia/io/llcpp/fidl.h> |
| #include <lib/async/cpp/wait.h> |
| |
| #include <fbl/macros.h> |
| #include <fbl/string.h> |
| |
| #include "pseudo_dir.h" |
| #include "src/lib/storage/vfs/cpp/pseudo_dir.h" |
| #include "src/lib/storage/vfs/cpp/remote_dir.h" |
| #include "vnode.h" |
| |
| namespace fs { |
| |
| // A remote directory which automatically removes itself once the remote channel being tracked is |
| // closed. |
| // |
| // This class is thread-compatible. |
| class TrackedRemoteDir : public RemoteDir { |
| public: |
| // Adds |this| as an entry to |container| with the label |name|. |
| // |
| // Begins monitoring |remote| (provided at construction-time) for |PEER_CLOSED|. When this signal |
| // is activated, the |name| entry is removed from |container|. |
| // |
| // Returns |ZX_ERR_BAD_STATE| if this directory is already tracked. |
| // Returns an error if an entry named |name| cannot be added to |container|. |
| // Returns an error if the underlying handle cannot be monitored for peer closed. |
| zx_status_t AddAsTrackedEntry(async_dispatcher_t* dispatcher, PseudoDir* container, |
| fbl::String name); |
| |
| protected: |
| friend fbl::internal::MakeRefCountedHelper<TrackedRemoteDir>; |
| friend fbl::RefPtr<TrackedRemoteDir>; |
| |
| // Create a directory which is accessed remotely through |remote|. |
| explicit TrackedRemoteDir(fidl::ClientEnd<fuchsia_io::Directory> remote); |
| |
| ~TrackedRemoteDir() override = default; |
| |
| private: |
| void HandleClose(async_dispatcher_t* dispatcher, async::WaitBase* wait, zx_status_t status, |
| const zx_packet_signal_t* signal); |
| bool IsTracked() const; |
| |
| async::WaitMethod<TrackedRemoteDir, &TrackedRemoteDir::HandleClose> tracker_; |
| fbl::String name_; |
| PseudoDir* container_; |
| }; |
| |
| } // namespace fs |
| |
| #endif // SRC_LIB_STORAGE_VFS_CPP_TRACKED_REMOTE_DIR_H_ |