2017-04-11 19:06:02 -05:00
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// Copyright 2017 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// +build linux darwin freebsd
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package fuse
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import (
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"os"
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"path/filepath"
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"sync"
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2018-04-17 17:53:50 -05:00
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"bazil.org/fuse"
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"bazil.org/fuse/fs"
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"golang.org/x/net/context"
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2017-04-11 19:06:02 -05:00
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)
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var (
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_ fs.Node = (*SwarmDir)(nil)
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_ fs.NodeRequestLookuper = (*SwarmDir)(nil)
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_ fs.HandleReadDirAller = (*SwarmDir)(nil)
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_ fs.NodeCreater = (*SwarmDir)(nil)
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_ fs.NodeRemover = (*SwarmDir)(nil)
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_ fs.NodeMkdirer = (*SwarmDir)(nil)
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)
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type SwarmDir struct {
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inode uint64
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name string
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path string
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directories []*SwarmDir
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files []*SwarmFile
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mountInfo *MountInfo
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lock *sync.RWMutex
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}
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func NewSwarmDir(fullpath string, minfo *MountInfo) *SwarmDir {
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newdir := &SwarmDir{
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inode: NewInode(),
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name: filepath.Base(fullpath),
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path: fullpath,
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directories: []*SwarmDir{},
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files: []*SwarmFile{},
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mountInfo: minfo,
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lock: &sync.RWMutex{},
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}
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return newdir
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}
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func (sd *SwarmDir) Attr(ctx context.Context, a *fuse.Attr) error {
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a.Inode = sd.inode
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a.Mode = os.ModeDir | 0700
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a.Uid = uint32(os.Getuid())
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a.Gid = uint32(os.Getegid())
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return nil
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}
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func (sd *SwarmDir) Lookup(ctx context.Context, req *fuse.LookupRequest, resp *fuse.LookupResponse) (fs.Node, error) {
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for _, n := range sd.files {
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if n.name == req.Name {
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return n, nil
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}
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}
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for _, n := range sd.directories {
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if n.name == req.Name {
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return n, nil
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}
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}
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return nil, fuse.ENOENT
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}
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func (sd *SwarmDir) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
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var children []fuse.Dirent
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for _, file := range sd.files {
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children = append(children, fuse.Dirent{Inode: file.inode, Type: fuse.DT_File, Name: file.name})
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}
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for _, dir := range sd.directories {
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children = append(children, fuse.Dirent{Inode: dir.inode, Type: fuse.DT_Dir, Name: dir.name})
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}
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return children, nil
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}
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func (sd *SwarmDir) Create(ctx context.Context, req *fuse.CreateRequest, resp *fuse.CreateResponse) (fs.Node, fs.Handle, error) {
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newFile := NewSwarmFile(sd.path, req.Name, sd.mountInfo)
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newFile.fileSize = 0 // 0 means, file is not in swarm yet and it is just created
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sd.lock.Lock()
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defer sd.lock.Unlock()
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sd.files = append(sd.files, newFile)
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return newFile, newFile, nil
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}
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func (sd *SwarmDir) Remove(ctx context.Context, req *fuse.RemoveRequest) error {
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if req.Dir && sd.directories != nil {
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newDirs := []*SwarmDir{}
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for _, dir := range sd.directories {
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if dir.name == req.Name {
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removeDirectoryFromSwarm(dir)
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} else {
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newDirs = append(newDirs, dir)
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}
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}
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if len(sd.directories) > len(newDirs) {
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sd.lock.Lock()
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defer sd.lock.Unlock()
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sd.directories = newDirs
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}
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return nil
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} else if !req.Dir && sd.files != nil {
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newFiles := []*SwarmFile{}
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for _, f := range sd.files {
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if f.name == req.Name {
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removeFileFromSwarm(f)
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} else {
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newFiles = append(newFiles, f)
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}
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}
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if len(sd.files) > len(newFiles) {
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sd.lock.Lock()
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defer sd.lock.Unlock()
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sd.files = newFiles
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}
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return nil
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}
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return fuse.ENOENT
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}
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func (sd *SwarmDir) Mkdir(ctx context.Context, req *fuse.MkdirRequest) (fs.Node, error) {
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newDir := NewSwarmDir(req.Name, sd.mountInfo)
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sd.lock.Lock()
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defer sd.lock.Unlock()
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sd.directories = append(sd.directories, newDir)
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return newDir, nil
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}
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