mirror of
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a6b4e0f2ff
Summary: The new blob cache wants to know, given a request, whether the blob is expected to be needed or not. The answer, in general, is yes if the request came from Thrift and no if it came from FUSE, because the kernel will cache the result of the request in its own page and dentry caches. Propagate this information through FileInode. Reviewed By: strager Differential Revision: D12813838 fbshipit-source-id: 7a359686149cd4daff41630c94085b680c448c4f
105 lines
3.2 KiB
C++
105 lines
3.2 KiB
C++
/*
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* Copyright (c) 2016-present, 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 "eden/fs/fuse/Dispatcher.h"
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#include "eden/fs/inodes/InodePtr.h"
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namespace facebook {
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namespace eden {
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class EdenMount;
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class FileInode;
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class InodeBase;
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class InodeMap;
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class TreeInode;
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/**
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* A FUSE request dispatcher for eden mount points.
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*/
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class EdenDispatcher : public Dispatcher {
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public:
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/*
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* Create an EdenDispatcher.
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* setRootInode() must be called before using this dispatcher.
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*/
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explicit EdenDispatcher(EdenMount* mount);
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folly::Future<Attr> getattr(InodeNumber ino) override;
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folly::Future<Attr> setattr(InodeNumber ino, const fuse_setattr_in& attr)
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override;
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folly::Future<std::shared_ptr<DirHandle>> opendir(InodeNumber ino, int flags)
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override;
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folly::Future<fuse_entry_out> lookup(
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InodeNumber parent,
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PathComponentPiece name) override;
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void forget(InodeNumber ino, unsigned long nlookup) override;
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folly::Future<std::shared_ptr<FileHandle>> open(InodeNumber ino, int flags)
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override;
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folly::Future<std::string> readlink(
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InodeNumber ino,
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bool kernelCachesReadlink) override;
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folly::Future<fuse_entry_out> mknod(
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InodeNumber parent,
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PathComponentPiece name,
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mode_t mode,
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dev_t rdev) override;
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folly::Future<fuse_entry_out>
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mkdir(InodeNumber parent, PathComponentPiece name, mode_t mode) override;
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folly::Future<folly::Unit> unlink(InodeNumber parent, PathComponentPiece name)
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override;
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folly::Future<folly::Unit> rmdir(InodeNumber parent, PathComponentPiece name)
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override;
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folly::Future<fuse_entry_out> symlink(
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InodeNumber parent,
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PathComponentPiece name,
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folly::StringPiece link) override;
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folly::Future<folly::Unit> rename(
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InodeNumber parent,
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PathComponentPiece name,
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InodeNumber newparent,
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PathComponentPiece newname) override;
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folly::Future<fuse_entry_out> link(
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InodeNumber ino,
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InodeNumber newparent,
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PathComponentPiece newname) override;
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folly::Future<Dispatcher::Create> create(
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InodeNumber parent,
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PathComponentPiece name,
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mode_t mode,
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int flags) override;
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folly::Future<BufVec> read(InodeNumber ino, size_t size, off_t off) override;
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folly::Future<size_t> write(
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std::shared_ptr<FileHandle> ptr,
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InodeNumber ino,
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folly::StringPiece data,
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off_t off) override;
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folly::Future<folly::Unit> fsync(InodeNumber ino, bool datasync) override;
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folly::Future<std::string> getxattr(InodeNumber ino, folly::StringPiece name)
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override;
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folly::Future<std::vector<std::string>> listxattr(InodeNumber ino) override;
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private:
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// The EdenMount that owns this EdenDispatcher.
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EdenMount* const mount_;
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// The EdenMount's InodeMap.
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// We store this pointer purely for convenience. We need it on pretty much
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// every FUSE request, and having it locally avoids having to dereference
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// mount_ first.
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InodeMap* const inodeMap_;
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};
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} // namespace eden
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} // namespace facebook
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