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a6ae3edab9
Summary: This change makes it so that all of the C++ code related to the edenfs daemon is now contained in the eden/fs subdirectory. Reviewed By: bolinfest, wez Differential Revision: D4889053 fbshipit-source-id: d0bd4774cc0bdb5d1d6b6f47d716ecae52391f37
62 lines
1.6 KiB
C++
62 lines
1.6 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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#include "DirList.h"
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#include <linux/fuse.h>
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#include "fuse_headers.h"
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using folly::StringPiece;
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namespace facebook {
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namespace eden {
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namespace fusell {
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DirList::DirList(size_t maxSize)
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: buf_(new char[maxSize]), end_(buf_.get() + maxSize), cur_(buf_.get()) {}
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bool DirList::add(StringPiece name, ino_t inode, dtype_t type, off_t off) {
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// The libfuse APIs unfortunately only accept null terminated strings,
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// so we manually add the fuse_dirent object here rather than using
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// fuse_add_direntry().
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size_t avail = end_ - cur_;
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auto entLength = FUSE_NAME_OFFSET + name.size();
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auto fullSize = FUSE_DIRENT_ALIGN(entLength);
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if (fullSize > avail) {
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return false;
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}
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fuse_dirent* dirent = reinterpret_cast<fuse_dirent*>(cur_);
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dirent->ino = inode;
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dirent->off = off;
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dirent->namelen = name.size();
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dirent->type = static_cast<decltype(dirent->type)>(type);
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memcpy(dirent->name, name.data(), name.size());
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if (fullSize > entLength) {
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// 0 out any padding
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memset(cur_ + entLength, 0, fullSize - entLength);
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}
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cur_ += fullSize;
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DCHECK_LE(cur_, end_);
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return true;
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}
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bool DirList::add(StringPiece name, const struct stat& st, off_t off) {
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return add(name, st.st_ino, mode_to_dtype(st.st_mode), off);
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}
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StringPiece DirList::getBuf() const {
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return StringPiece(buf_.get(), cur_ - buf_.get());
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}
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}
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}
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}
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