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aaa3332644
Summary: This cleans up construction of the EdenMount and Dirstate objects: - The EdenMount constructor is now responsible for creating the Overlay and Dirstate objects. - The Dirstate constructor is now responsible for loading the DirstatePersistence file. - The EdenMount now takes ownership of the ClientConfig object, and stores it for later use. - The ClientConfig object now has a method to get the path to the DirstatePersistence file. - I added a ClientConfig::createTestConfig() method, so that the TestMount code can now use the same EdenMount constructor as the normal code. This simplifies the logic in EdenServiceHandler and TestMount, and makes some of the initialization dependencies a little bit simpler. This change is necessary in order for me to move some logic from fusell::MountPoint into EdenMount. The Dirstate object will need a pointer back to its EdenMount object, and this diff enables that. Reviewed By: bolinfest Differential Revision: D4249393 fbshipit-source-id: 439786accbf48c8696dbc6ca4fe77a4c6bdeab65
130 lines
3.3 KiB
C++
130 lines
3.3 KiB
C++
/*
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* Copyright (c) 2016, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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*/
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#pragma once
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#include <folly/Synchronized.h>
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#include <memory>
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#include "eden/fs/journal/JournalDelta.h"
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#include "eden/utils/PathFuncs.h"
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namespace facebook {
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namespace eden {
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namespace fusell {
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class MountPoint;
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}
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class BindMount;
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class ClientConfig;
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class Dirstate;
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class ObjectStore;
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class Overlay;
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class Journal;
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class Tree;
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/*
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* EdenMount contains all of the data about a specific eden mount point.
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*
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* This contains:
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* - The fusell::MountPoint object which manages our FUSE interactions with the
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* kernel.
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* - The ObjectStore object used for retreiving/storing object data.
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* - The Overlay object used for storing local changes (that have not been
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* committed/snapshotted yet).
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*/
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class EdenMount {
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public:
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EdenMount(
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std::unique_ptr<ClientConfig> config,
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std::unique_ptr<ObjectStore> objectStore);
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virtual ~EdenMount();
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/*
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* Get the MountPoint object.
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*
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* This returns a raw pointer since the EdenMount owns the mount point.
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* The caller should generally maintain a reference to the EdenMount object,
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* and not directly to the MountPoint object itself.
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*/
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fusell::MountPoint* getMountPoint() const {
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return mountPoint_.get();
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}
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/*
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* Return the path to the mount point.
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*/
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const AbsolutePath& getPath() const;
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/*
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* Return bind mounts that are applied for this mount. These are based on the
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* state of the ClientConfig when this EdenMount was created.
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*/
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const std::vector<BindMount>& getBindMounts() const;
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/*
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* Return the ObjectStore used by this mount point.
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*
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* The ObjectStore is guaranteed to be valid for the lifetime of the
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* EdenMount.
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*/
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ObjectStore* getObjectStore() const {
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return objectStore_.get();
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}
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const std::shared_ptr<Overlay>& getOverlay() const {
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return overlay_;
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}
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Dirstate* getDirstate() {
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return dirstate_.get();
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}
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folly::Synchronized<Journal>& getJournal() {
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return journal_;
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}
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uint64_t getMountGeneration() const {
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return mountGeneration_;
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}
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const ClientConfig* getConfig() const {
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return config_.get();
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}
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/** Convenience method for getting the Tree for the root of the mount. */
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std::unique_ptr<Tree> getRootTree() const;
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private:
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// Forbidden copy constructor and assignment operator
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EdenMount(EdenMount const&) = delete;
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EdenMount& operator=(EdenMount const&) = delete;
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std::unique_ptr<ClientConfig> config_;
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std::unique_ptr<fusell::MountPoint> mountPoint_;
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std::unique_ptr<ObjectStore> objectStore_;
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std::shared_ptr<Overlay> overlay_;
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std::unique_ptr<Dirstate> dirstate_;
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/*
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* Note that this config will not be updated if the user modifies the
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* underlying config files after the ClientConfig was created.
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*/
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const std::vector<BindMount> bindMounts_;
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folly::Synchronized<Journal> journal_;
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/*
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* A number to uniquely identify this particular incarnation of this mount.
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* We use bits from the process id and the time at which we were mounted.
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*/
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const uint64_t mountGeneration_;
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};
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}
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}
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