diqiu50 commented on code in PR #5738: URL: https://github.com/apache/gravitino/pull/5738#discussion_r1878050265
########## clients/filesystem-fuse/src/fuse_api_handle.rs: ########## @@ -0,0 +1,437 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +use crate::filesystem::{FileStat, FileSystemContext, RawFileSystem, SimpleFileSystem}; +use fuse3::path::prelude::{ReplyData, ReplyOpen, ReplyStatFs, ReplyWrite}; +use fuse3::path::Request; +use fuse3::raw::prelude::{ + FileAttr, ReplyAttr, ReplyCreated, ReplyDirectory, ReplyDirectoryPlus, ReplyEntry, ReplyInit, +}; +use fuse3::raw::reply::{DirectoryEntry, DirectoryEntryPlus}; +use fuse3::raw::Filesystem; +use fuse3::FileType::{Directory, RegularFile}; +use fuse3::{Errno, FileType, Inode, SetAttr, Timestamp}; +use futures_util::stream::BoxStream; +use futures_util::StreamExt; +use futures_util::{stream, FutureExt}; +use std::ffi::{OsStr, OsString}; +use std::num::NonZeroU32; +use std::time::{Duration, SystemTime}; + +pub(crate) struct FuseApiHandle<T: RawFileSystem> { + local_fs: T, + default_ttl: Duration, + fs_context: FileSystemContext, +} + +impl<T: RawFileSystem> FuseApiHandle<T> { + pub fn new(fs: T, context: FileSystemContext) -> Self { + FuseApiHandle { + local_fs: fs, + default_ttl: Duration::from_secs(1), + fs_context: context, + } + } + + pub async fn get_file_path(&self, inode: u64) -> String { + self.local_fs.get_file_path(inode).await + } + + async fn get_modified_file_stat( + &self, + inode: u64, + size: Option<u64>, + atime: Option<Timestamp>, + mtime: Option<Timestamp>, + ) -> Result<FileStat, Errno> { + let file_stat = self.local_fs.stat(inode).await?; + let mut nf = FileStat::clone(&file_stat); + size.map(|size| { + nf.size = size; + }); + atime.map(|atime| { + nf.atime = atime; + }); + mtime.map(|mtime| { + nf.mtime = mtime; + }); + Ok(nf) + } +} + +impl<T: RawFileSystem> Filesystem for FuseApiHandle<T> { + async fn init(&self, _req: Request) -> fuse3::Result<ReplyInit> { + self.local_fs.init().await; + Ok(ReplyInit { + max_write: NonZeroU32::new(16 * 1024).unwrap(), + }) + } + + async fn destroy(&self, _req: Request) {} + + async fn lookup( + &self, + _req: Request, + parent: Inode, + name: &OsStr, + ) -> fuse3::Result<ReplyEntry> { + let file_stat = self.local_fs.lookup(parent, name.to_str().unwrap()).await?; + Ok(ReplyEntry { + ttl: self.default_ttl, + attr: fstat_to_file_attr(&file_stat, &self.fs_context), + generation: 0, + }) + } + + async fn getattr( + &self, + _req: Request, + inode: Inode, + fh: Option<u64>, + _flags: u32, + ) -> fuse3::Result<ReplyAttr> { + // check the opened file inode is the same as the inode + if let Some(fh) = fh { + self.local_fs.valid_file_id(inode, fh).await?; + } + + let file_stat = self.local_fs.stat(inode).await?; + Ok(ReplyAttr { + ttl: self.default_ttl, + attr: fstat_to_file_attr(&file_stat, &self.fs_context), + }) + } + + async fn setattr( + &self, + req: Request, + inode: Inode, + fh: Option<u64>, + set_attr: SetAttr, + ) -> fuse3::Result<ReplyAttr> { + let new_file_stat = self + .get_modified_file_stat(inode, set_attr.size, set_attr.atime, set_attr.mtime) + .await?; + let attr = fstat_to_file_attr(&new_file_stat, &self.fs_context); + self.local_fs.set_attr(inode, &new_file_stat).await?; + Ok(ReplyAttr { + ttl: self.default_ttl, + attr: attr, + }) + } + + async fn mkdir( + &self, + req: Request, + parent: Inode, + name: &OsStr, + mode: u32, + umask: u32, + ) -> fuse3::Result<ReplyEntry> { + let handle_id = self + .local_fs + .create_dir(parent, name.to_str().unwrap()) + .await?; + Ok(ReplyEntry { + ttl: self.default_ttl, + attr: dummy_file_attr( + handle_id.file_id, + Directory, + Timestamp::from(SystemTime::now()), + &self.fs_context, + ), + generation: 0, + }) + } + + async fn unlink(&self, req: Request, parent: Inode, name: &OsStr) -> fuse3::Result<()> { + let result = self + .local_fs + .remove_file(parent, name.to_str().unwrap()) + .await?; + Ok(()) + } + + async fn rmdir(&self, req: Request, parent: Inode, name: &OsStr) -> fuse3::Result<()> { Review Comment: The function names are the trait of `fues3::Filesystem`. we can't change them -- This is an automated message from the Apache Git Service. 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