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62076b545e
Summary: Instead of having one "Dispatcher" type that the various backend overload, let's simply have a per-mount type dispatcher type. The previous model worked fine when EdenFS supported only one way of mounting a repository, but with NFS coming, unix platform will support both FUSE and NFS, making the Dispatcher overload nonsensical. As a behavioral change, the dispatcher lifetime and ownership is changed a bit. It used to live for the duration of the EdenMount object, but is now tied to the channel lifetime, as it is now owned by it. Reviewed By: kmancini Differential Revision: D26329477 fbshipit-source-id: 3959b90a4909e3ab0898caa308f54686f59a943c
152 lines
3.6 KiB
C++
152 lines
3.6 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This software may be used and distributed according to the terms of the
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* GNU General Public License version 2.
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*/
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#pragma once
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#include "folly/portability/Windows.h"
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#include <ProjectedFSLib.h> // @manual
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#include "eden/fs/prjfs/Enumerator.h"
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#include "eden/fs/utils/Guid.h"
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#include "eden/fs/utils/PathFuncs.h"
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namespace folly {
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template <class T>
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class Future;
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} // namespace folly
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namespace facebook::eden {
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class ObjectFetchContext;
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class EdenStats;
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struct InodeMetadata {
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// To ensure that the OS has a record of the canonical file name, and not
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// just whatever case was used to lookup the file, we capture the
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// relative path here.
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RelativePath path;
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size_t size;
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bool isDir;
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};
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struct LookupResult {
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InodeMetadata meta;
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std::function<void()> incFsRefcount;
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};
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class PrjfsDispatcher {
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public:
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virtual ~PrjfsDispatcher();
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explicit PrjfsDispatcher(EdenStats* stats);
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EdenStats* getStats() const;
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/**
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* Open a directory
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*/
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virtual folly::Future<std::vector<FileMetadata>> opendir(
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RelativePathPiece path,
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ObjectFetchContext& context) = 0;
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/**
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* Lookup the specified file and get its attributes.
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*/
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virtual folly::Future<std::optional<LookupResult>> lookup(
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RelativePath path,
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ObjectFetchContext& context) = 0;
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/**
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* Test if a file with the given name exist
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*/
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virtual folly::Future<bool> access(
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RelativePath path,
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ObjectFetchContext& context) = 0;
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/**
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* Read the file with the given name
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*
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* Returns the entire content of the file at path.
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*
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* In the future, this will return only what's in between offset and
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* offset+length.
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*/
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virtual folly::Future<std::string> read(
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RelativePath path,
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ObjectFetchContext& context) = 0;
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/**
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* Notification sent when a file was created
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*/
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virtual folly::Future<folly::Unit> newFileCreated(
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RelativePath relPath,
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RelativePath destPath,
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bool isDirectory,
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ObjectFetchContext& context) = 0;
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/**
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* Notification sent when a file was ovewritten
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*/
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virtual folly::Future<folly::Unit> fileOverwritten(
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RelativePath relPath,
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RelativePath destPath,
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bool isDirectory,
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ObjectFetchContext& context) = 0;
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/**
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* Notification sent when a file is closed after being modified
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*/
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virtual folly::Future<folly::Unit> fileHandleClosedFileModified(
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RelativePath relPath,
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RelativePath destPath,
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bool isDirectory,
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ObjectFetchContext& context) = 0;
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/**
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* Notification sent when a file is renamed
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*/
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virtual folly::Future<folly::Unit> fileRenamed(
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RelativePath oldPath,
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RelativePath newPath,
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bool isDirectory,
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ObjectFetchContext& context) = 0;
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/**
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* Notification sent prior to renaming a file
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*
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* A failure will block the rename operation
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*/
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virtual folly::Future<folly::Unit> preRename(
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RelativePath oldPath,
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RelativePath newPath,
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bool isDirectory,
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ObjectFetchContext& context) = 0;
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/**
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* Notification sent when a file is being removed
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*/
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virtual folly::Future<folly::Unit> fileHandleClosedFileDeleted(
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RelativePath relPath,
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RelativePath destPath,
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bool isDirectory,
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ObjectFetchContext& context) = 0;
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/**
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* Notification sent prior to creating a hardlink
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*
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* A failure will block the hardlink operation
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*/
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virtual folly::Future<folly::Unit> preSetHardlink(
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RelativePath oldPath,
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RelativePath newPath,
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bool isDirectory,
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ObjectFetchContext& context) = 0;
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private:
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EdenStats* stats_{nullptr};
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};
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} // namespace facebook::eden
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