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e97f1c7240
Summary: This adds logging for data fetches that come from the thrift checkout call to help debug the cause of unexpected data fetches. (See D22448048 for more motivation) Reviewed By: chadaustin Differential Revision: D22489504 fbshipit-source-id: 3b732a1e5627c2130f561ec0138a1df270e1925d
128 lines
3.4 KiB
C++
128 lines
3.4 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 <vector>
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#include <folly/Range.h>
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#include <folly/Synchronized.h>
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#include <folly/stop_watch.h>
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#include "eden/fs/inodes/EdenMount.h"
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#include "eden/fs/inodes/InodePtrFwd.h"
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#include "eden/fs/service/gen-cpp2/eden_types.h"
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#include "eden/fs/store/StatsFetchContext.h"
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#include "eden/fs/utils/PathFuncs.h"
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namespace folly {
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class exception_wrapper;
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template <typename T>
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class Future;
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struct Unit;
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} // namespace folly
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namespace facebook {
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namespace eden {
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class CheckoutConflict;
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class TreeInode;
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class Tree;
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/**
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* CheckoutContext maintains state during a checkout operation.
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*/
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class CheckoutContext {
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public:
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CheckoutContext(
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EdenMount* mount,
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folly::Synchronized<EdenMount::ParentInfo>::LockedPtr&& parentsLock,
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CheckoutMode checkoutMode,
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std::optional<pid_t> clientPid,
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folly::StringPiece thriftMethodName);
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~CheckoutContext();
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/**
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* Returns true if the checkout operation should do a dry run, looking for
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* conflicts without actually updating the inode contents. If it returns
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* false, it should actually update the inodes as part of the checkout.
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*/
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bool isDryRun() const {
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// TODO: make this configurable on checkout start
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return checkoutMode_ == CheckoutMode::DRY_RUN;
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}
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/**
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* Returns true if this checkout operation should force the new inode
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* contents to look like the data in the Tree being checked out, even if
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* there are conflicts.
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*
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* This will cause the checkout to always update files with conflicts to the
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* new contents, rather than just reporting and skipping files with
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* conflicts.
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*
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* forceUpdate() can only return true when isDryRun() is false.
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*/
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bool forceUpdate() const {
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return checkoutMode_ == CheckoutMode::FORCE;
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}
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/**
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* Start the checkout operation.
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*/
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void start(RenameLock&& renameLock);
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/**
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* Complete the checkout operation
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*
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* Returns the list of conflicts and errors that were encountered during the
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* operation.
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*/
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folly::Future<std::vector<CheckoutConflict>> finish(Hash newSnapshot);
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void addConflict(ConflictType type, RelativePathPiece path);
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void
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addConflict(ConflictType type, TreeInode* parent, PathComponentPiece name);
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void addConflict(ConflictType type, InodeBase* inode);
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void addError(
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TreeInode* parent,
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PathComponentPiece name,
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const folly::exception_wrapper& ew);
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/**
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* Get a reference to the rename lock.
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*
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* This is mostly used for APIs that require proof that we are currently
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* holding the lock.
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*/
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const RenameLock& renameLock() const {
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return renameLock_;
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}
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/**
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* Return the fetch context associated with this checkout context.
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*/
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StatsFetchContext& getFetchContext() {
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return fetchContext_;
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}
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private:
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CheckoutMode checkoutMode_;
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EdenMount* const mount_;
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folly::Synchronized<EdenMount::ParentInfo>::LockedPtr parentsLock_;
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RenameLock renameLock_;
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StatsFetchContext fetchContext_;
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// The checkout processing may occur across many threads,
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// if some data load operations complete asynchronously on other threads.
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// Therefore access to the conflicts list must be synchronized.
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folly::Synchronized<std::vector<CheckoutConflict>> conflicts_;
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};
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} // namespace eden
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} // namespace facebook
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