seaweedfs/weed/filesys/dir.go
chrislu 2dcb8cb93b POSIX: ensure file and directory inodes are different
this is just an in memory representation.

POSIX wants different inode numbers for the same named file or directory.
2022-01-11 23:44:48 -08:00

620 lines
16 KiB
Go

package filesys
import (
"bytes"
"context"
"math"
"os"
"strings"
"syscall"
"time"
"github.com/seaweedfs/fuse"
"github.com/seaweedfs/fuse/fs"
"github.com/chrislusf/seaweedfs/weed/filer"
"github.com/chrislusf/seaweedfs/weed/filesys/meta_cache"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/util"
)
type Dir struct {
name string
wfs *WFS
entry *filer_pb.Entry
parent *Dir
id uint64
}
var _ = fs.Node(&Dir{})
var _ = fs.NodeIdentifier(&Dir{})
var _ = fs.NodeCreater(&Dir{})
var _ = fs.NodeMknoder(&Dir{})
var _ = fs.NodeMkdirer(&Dir{})
var _ = fs.NodeFsyncer(&Dir{})
var _ = fs.NodeRequestLookuper(&Dir{})
var _ = fs.HandleReadDirAller(&Dir{})
var _ = fs.NodeRemover(&Dir{})
var _ = fs.NodeRenamer(&Dir{})
var _ = fs.NodeSetattrer(&Dir{})
var _ = fs.NodeGetxattrer(&Dir{})
var _ = fs.NodeSetxattrer(&Dir{})
var _ = fs.NodeRemovexattrer(&Dir{})
var _ = fs.NodeListxattrer(&Dir{})
var _ = fs.NodeForgetter(&Dir{})
func (dir *Dir) Id() uint64 {
if dir.parent == nil {
return 1
}
return dir.id
}
func (dir *Dir) Attr(ctx context.Context, attr *fuse.Attr) error {
entry, err := dir.maybeLoadEntry()
if err != nil {
glog.V(3).Infof("dir Attr %s, err: %+v", dir.FullPath(), err)
return err
}
// https://github.com/bazil/fuse/issues/196
attr.Valid = time.Second
attr.Inode = dir.Id()
attr.Mode = os.FileMode(entry.Attributes.FileMode) | os.ModeDir
attr.Mtime = time.Unix(entry.Attributes.Mtime, 0)
attr.Crtime = time.Unix(entry.Attributes.Crtime, 0)
attr.Ctime = time.Unix(entry.Attributes.Crtime, 0)
attr.Atime = time.Unix(entry.Attributes.Mtime, 0)
attr.Gid = entry.Attributes.Gid
attr.Uid = entry.Attributes.Uid
if dir.FullPath() == dir.wfs.option.FilerMountRootPath {
attr.BlockSize = blockSize
}
glog.V(4).Infof("dir Attr %s, attr: %+v", dir.FullPath(), attr)
return nil
}
func (dir *Dir) Getxattr(ctx context.Context, req *fuse.GetxattrRequest, resp *fuse.GetxattrResponse) error {
glog.V(4).Infof("dir Getxattr %s", dir.FullPath())
entry, err := dir.maybeLoadEntry()
if err != nil {
return err
}
return getxattr(entry, req, resp)
}
func (dir *Dir) Fsync(ctx context.Context, req *fuse.FsyncRequest) error {
// fsync works at OS level
// write the file chunks to the filerGrpcAddress
glog.V(3).Infof("dir %s fsync %+v", dir.FullPath(), req)
return nil
}
func (dir *Dir) newFile(name string) fs.Node {
fileFullPath := util.NewFullPath(dir.FullPath(), name)
fileId := fileFullPath.AsInode(false)
dir.wfs.handlesLock.Lock()
existingHandle, found := dir.wfs.handles[fileId]
dir.wfs.handlesLock.Unlock()
if found {
glog.V(4).Infof("newFile found opened file handle: %+v", fileFullPath)
return existingHandle.f
}
return &File{
Name: name,
dir: dir,
wfs: dir.wfs,
id: fileId,
}
}
func (dir *Dir) newDirectory(fullpath util.FullPath) fs.Node {
return &Dir{name: fullpath.Name(), wfs: dir.wfs, parent: dir, id: fullpath.AsInode(true)}
}
func (dir *Dir) Create(ctx context.Context, req *fuse.CreateRequest,
resp *fuse.CreateResponse) (fs.Node, fs.Handle, error) {
exclusive := req.Flags&fuse.OpenExclusive != 0
isDirectory := req.Mode&os.ModeDir > 0
if exclusive || isDirectory {
_, err := dir.doCreateEntry(req.Name, req.Mode, req.Uid, req.Gid, exclusive)
if err != nil {
return nil, nil, err
}
}
var node fs.Node
if isDirectory {
node = dir.newDirectory(util.NewFullPath(dir.FullPath(), req.Name))
return node, node, nil
}
node = dir.newFile(req.Name)
file := node.(*File)
file.entry = &filer_pb.Entry{
Name: req.Name,
IsDirectory: req.Mode&os.ModeDir > 0,
Attributes: &filer_pb.FuseAttributes{
Mtime: time.Now().Unix(),
Crtime: time.Now().Unix(),
FileMode: uint32(req.Mode &^ dir.wfs.option.Umask),
Uid: req.Uid,
Gid: req.Gid,
Collection: dir.wfs.option.Collection,
Replication: dir.wfs.option.Replication,
TtlSec: dir.wfs.option.TtlSec,
},
}
file.dirtyMetadata = true
fh := dir.wfs.AcquireHandle(file, req.Uid, req.Gid)
return file, fh, nil
}
func (dir *Dir) Mknod(ctx context.Context, req *fuse.MknodRequest) (fs.Node, error) {
glog.V(3).Infof("dir %s Mknod %+v", dir.FullPath(), req)
_, err := dir.doCreateEntry(req.Name, req.Mode, req.Uid, req.Gid, false)
if err != nil {
return nil, err
}
var node fs.Node
node = dir.newFile(req.Name)
return node, nil
}
func (dir *Dir) doCreateEntry(name string, mode os.FileMode, uid, gid uint32, exclusive bool) (*filer_pb.CreateEntryRequest, error) {
dirFullPath := dir.FullPath()
request := &filer_pb.CreateEntryRequest{
Directory: dirFullPath,
Entry: &filer_pb.Entry{
Name: name,
IsDirectory: mode&os.ModeDir > 0,
Attributes: &filer_pb.FuseAttributes{
Mtime: time.Now().Unix(),
Crtime: time.Now().Unix(),
FileMode: uint32(mode &^ dir.wfs.option.Umask),
Uid: uid,
Gid: gid,
Collection: dir.wfs.option.Collection,
Replication: dir.wfs.option.Replication,
TtlSec: dir.wfs.option.TtlSec,
},
},
OExcl: exclusive,
Signatures: []int32{dir.wfs.signature},
}
glog.V(1).Infof("create %s/%s", dirFullPath, name)
err := dir.wfs.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
dir.wfs.mapPbIdFromLocalToFiler(request.Entry)
defer dir.wfs.mapPbIdFromFilerToLocal(request.Entry)
if err := filer_pb.CreateEntry(client, request); err != nil {
if strings.Contains(err.Error(), "EEXIST") {
return fuse.EEXIST
}
glog.V(0).Infof("create %s/%s: %v", dirFullPath, name, err)
return fuse.EIO
}
if err := dir.wfs.metaCache.InsertEntry(context.Background(), filer.FromPbEntry(request.Directory, request.Entry)); err != nil {
glog.Errorf("local InsertEntry dir %s/%s: %v", dirFullPath, name, err)
return fuse.EIO
}
return nil
})
return request, err
}
func (dir *Dir) Mkdir(ctx context.Context, req *fuse.MkdirRequest) (fs.Node, error) {
glog.V(4).Infof("mkdir %s: %s", dir.FullPath(), req.Name)
newEntry := &filer_pb.Entry{
Name: req.Name,
IsDirectory: true,
Attributes: &filer_pb.FuseAttributes{
Mtime: time.Now().Unix(),
Crtime: time.Now().Unix(),
FileMode: uint32(req.Mode &^ dir.wfs.option.Umask),
Uid: req.Uid,
Gid: req.Gid,
},
}
dirFullPath := dir.FullPath()
err := dir.wfs.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
dir.wfs.mapPbIdFromLocalToFiler(newEntry)
defer dir.wfs.mapPbIdFromFilerToLocal(newEntry)
request := &filer_pb.CreateEntryRequest{
Directory: dirFullPath,
Entry: newEntry,
Signatures: []int32{dir.wfs.signature},
}
glog.V(1).Infof("mkdir: %v", request)
if err := filer_pb.CreateEntry(client, request); err != nil {
glog.V(0).Infof("mkdir %s/%s: %v", dirFullPath, req.Name, err)
return err
}
if err := dir.wfs.metaCache.InsertEntry(context.Background(), filer.FromPbEntry(request.Directory, request.Entry)); err != nil {
glog.Errorf("local mkdir dir %s/%s: %v", dirFullPath, req.Name, err)
return fuse.EIO
}
return nil
})
if err == nil {
node := dir.newDirectory(util.NewFullPath(dirFullPath, req.Name))
return node, nil
}
glog.V(0).Infof("mkdir %s/%s: %v", dirFullPath, req.Name, err)
return nil, fuse.EIO
}
func (dir *Dir) Lookup(ctx context.Context, req *fuse.LookupRequest, resp *fuse.LookupResponse) (node fs.Node, err error) {
dirPath := util.FullPath(dir.FullPath())
// glog.V(4).Infof("dir Lookup %s: %s by %s", dirPath, req.Name, req.Header.String())
fullFilePath := dirPath.Child(req.Name)
visitErr := meta_cache.EnsureVisited(dir.wfs.metaCache, dir.wfs, dirPath)
if visitErr != nil {
glog.Errorf("dir Lookup %s: %v", dirPath, visitErr)
return nil, fuse.EIO
}
localEntry, cacheErr := dir.wfs.metaCache.FindEntry(context.Background(), fullFilePath)
if cacheErr == filer_pb.ErrNotFound {
return nil, fuse.ENOENT
}
if localEntry == nil {
// glog.V(3).Infof("dir Lookup cache miss %s", fullFilePath)
entry, err := filer_pb.GetEntry(dir.wfs, fullFilePath)
if err != nil {
glog.V(1).Infof("dir GetEntry %s: %v", fullFilePath, err)
return nil, fuse.ENOENT
}
localEntry = filer.FromPbEntry(string(dirPath), entry)
} else {
glog.V(4).Infof("dir Lookup cache hit %s", fullFilePath)
}
if localEntry != nil {
if localEntry.IsDirectory() {
node = dir.newDirectory(fullFilePath)
} else {
node = dir.newFile(req.Name)
}
// resp.EntryValid = time.Second
resp.Attr.Valid = time.Second
resp.Attr.Size = localEntry.FileSize
resp.Attr.Mtime = localEntry.Attr.Mtime
resp.Attr.Crtime = localEntry.Attr.Crtime
resp.Attr.Mode = localEntry.Attr.Mode
resp.Attr.Gid = localEntry.Attr.Gid
resp.Attr.Uid = localEntry.Attr.Uid
if localEntry.HardLinkCounter > 0 {
resp.Attr.Nlink = uint32(localEntry.HardLinkCounter)
}
return node, nil
}
glog.V(4).Infof("not found dir GetEntry %s: %v", fullFilePath, err)
return nil, fuse.ENOENT
}
func (dir *Dir) ReadDirAll(ctx context.Context) (ret []fuse.Dirent, err error) {
dirPath := util.FullPath(dir.FullPath())
glog.V(4).Infof("dir ReadDirAll %s", dirPath)
processEachEntryFn := func(entry *filer.Entry, isLast bool) {
if entry.IsDirectory() {
dirent := fuse.Dirent{Name: entry.Name(), Type: fuse.DT_Dir, Inode: dirPath.Child(entry.Name()).AsInode(true)}
ret = append(ret, dirent)
} else {
dirent := fuse.Dirent{Name: entry.Name(), Type: findFileType(uint16(entry.Attr.Mode)), Inode: dirPath.Child(entry.Name()).AsInode(false)}
ret = append(ret, dirent)
}
}
if err = meta_cache.EnsureVisited(dir.wfs.metaCache, dir.wfs, dirPath); err != nil {
glog.Errorf("dir ReadDirAll %s: %v", dirPath, err)
return nil, fuse.EIO
}
listErr := dir.wfs.metaCache.ListDirectoryEntries(context.Background(), dirPath, "", false, int64(math.MaxInt32), func(entry *filer.Entry) bool {
processEachEntryFn(entry, false)
return true
})
if listErr != nil {
glog.Errorf("list meta cache: %v", listErr)
return nil, fuse.EIO
}
// create proper . and .. directories
ret = append(ret, fuse.Dirent{
Inode: dirPath.AsInode(true),
Name: ".",
Type: fuse.DT_Dir,
})
// return the correct parent inode for the mount root
var inode uint64
if string(dirPath) == dir.wfs.option.FilerMountRootPath {
inode = dir.wfs.option.MountParentInode
} else {
inode = util.FullPath(dir.parent.FullPath()).AsInode(true)
}
ret = append(ret, fuse.Dirent{
Inode: inode,
Name: "..",
Type: fuse.DT_Dir,
})
return
}
func findFileType(mode uint16) fuse.DirentType {
switch mode & (syscall.S_IFMT & 0xffff) {
case syscall.S_IFSOCK:
return fuse.DT_Socket
case syscall.S_IFLNK:
return fuse.DT_Link
case syscall.S_IFREG:
return fuse.DT_File
case syscall.S_IFBLK:
return fuse.DT_Block
case syscall.S_IFDIR:
return fuse.DT_Dir
case syscall.S_IFCHR:
return fuse.DT_Char
case syscall.S_IFIFO:
return fuse.DT_FIFO
}
return fuse.DT_File
}
func (dir *Dir) Remove(ctx context.Context, req *fuse.RemoveRequest) error {
if !req.Dir {
return dir.removeOneFile(req)
}
return dir.removeFolder(req)
}
func (dir *Dir) removeOneFile(req *fuse.RemoveRequest) error {
dirFullPath := dir.FullPath()
filePath := util.NewFullPath(dirFullPath, req.Name)
entry, err := filer_pb.GetEntry(dir.wfs, filePath)
if err != nil {
return err
}
// first, ensure the filer store can correctly delete
glog.V(3).Infof("remove file: %v", req)
isDeleteData := entry != nil && entry.HardLinkCounter <= 1
err = filer_pb.Remove(dir.wfs, dirFullPath, req.Name, isDeleteData, false, false, false, []int32{dir.wfs.signature})
if err != nil {
glog.V(3).Infof("not found remove file %s: %v", filePath, err)
return fuse.ENOENT
}
// then, delete meta cache and fsNode cache
if err = dir.wfs.metaCache.DeleteEntry(context.Background(), filePath); err != nil {
glog.V(3).Infof("local DeleteEntry %s: %v", filePath, err)
return fuse.ESTALE
}
// remove current file handle if any
dir.wfs.handlesLock.Lock()
defer dir.wfs.handlesLock.Unlock()
inodeId := filePath.AsInode(false)
if fh, ok := dir.wfs.handles[inodeId]; ok {
delete(dir.wfs.handles, inodeId)
fh.isDeleted = true
}
return nil
}
func (dir *Dir) removeFolder(req *fuse.RemoveRequest) error {
dirFullPath := dir.FullPath()
glog.V(3).Infof("remove directory entry: %v", req)
ignoreRecursiveErr := true // ignore recursion error since the OS should manage it
err := filer_pb.Remove(dir.wfs, dirFullPath, req.Name, true, true, ignoreRecursiveErr, false, []int32{dir.wfs.signature})
if err != nil {
glog.V(0).Infof("remove %s/%s: %v", dirFullPath, req.Name, err)
if strings.Contains(err.Error(), "non-empty") {
return fuse.EEXIST
}
return fuse.ENOENT
}
t := util.NewFullPath(dirFullPath, req.Name)
dir.wfs.metaCache.DeleteEntry(context.Background(), t)
return nil
}
func (dir *Dir) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *fuse.SetattrResponse) error {
glog.V(4).Infof("%v dir setattr %+v", dir.FullPath(), req)
entry, err := dir.maybeLoadEntry()
if err != nil {
return err
}
if req.Valid.Mode() {
entry.Attributes.FileMode = uint32(req.Mode)
}
if req.Valid.Uid() {
entry.Attributes.Uid = req.Uid
}
if req.Valid.Gid() {
entry.Attributes.Gid = req.Gid
}
if req.Valid.Mtime() {
entry.Attributes.Mtime = req.Mtime.Unix()
}
return dir.saveEntry(entry)
}
func (dir *Dir) Setxattr(ctx context.Context, req *fuse.SetxattrRequest) error {
glog.V(4).Infof("dir Setxattr %s: %s", dir.FullPath(), req.Name)
entry, err := dir.maybeLoadEntry()
if err != nil {
return err
}
if err := setxattr(entry, req); err != nil {
return err
}
return dir.saveEntry(entry)
}
func (dir *Dir) Removexattr(ctx context.Context, req *fuse.RemovexattrRequest) error {
glog.V(4).Infof("dir Removexattr %s: %s", dir.FullPath(), req.Name)
entry, err := dir.maybeLoadEntry()
if err != nil {
return err
}
if err := removexattr(entry, req); err != nil {
return err
}
return dir.saveEntry(entry)
}
func (dir *Dir) Listxattr(ctx context.Context, req *fuse.ListxattrRequest, resp *fuse.ListxattrResponse) error {
glog.V(4).Infof("dir Listxattr %s", dir.FullPath())
entry, err := dir.maybeLoadEntry()
if err != nil {
return err
}
if err := listxattr(entry, req, resp); err != nil {
return err
}
return nil
}
func (dir *Dir) Forget() {
glog.V(4).Infof("Forget dir %s", dir.FullPath())
}
func (dir *Dir) maybeLoadEntry() (*filer_pb.Entry, error) {
parentDirPath, name := util.FullPath(dir.FullPath()).DirAndName()
return dir.wfs.maybeLoadEntry(parentDirPath, name)
}
func (dir *Dir) saveEntry(entry *filer_pb.Entry) error {
parentDir, name := util.FullPath(dir.FullPath()).DirAndName()
return dir.wfs.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error {
dir.wfs.mapPbIdFromLocalToFiler(entry)
defer dir.wfs.mapPbIdFromFilerToLocal(entry)
request := &filer_pb.UpdateEntryRequest{
Directory: parentDir,
Entry: entry,
Signatures: []int32{dir.wfs.signature},
}
glog.V(1).Infof("save dir entry: %v", request)
_, err := client.UpdateEntry(context.Background(), request)
if err != nil {
glog.Errorf("UpdateEntry dir %s/%s: %v", parentDir, name, err)
return fuse.EIO
}
if err := dir.wfs.metaCache.UpdateEntry(context.Background(), filer.FromPbEntry(request.Directory, request.Entry)); err != nil {
glog.Errorf("UpdateEntry dir %s/%s: %v", parentDir, name, err)
return fuse.ESTALE
}
return nil
})
}
func (dir *Dir) FullPath() string {
var parts []string
for p := dir; p != nil; p = p.parent {
if strings.HasPrefix(p.name, "/") {
if len(p.name) > 1 {
parts = append(parts, p.name[1:])
}
} else {
parts = append(parts, p.name)
}
}
if len(parts) == 0 {
return "/"
}
var buf bytes.Buffer
for i := len(parts) - 1; i >= 0; i-- {
buf.WriteString("/")
buf.WriteString(parts[i])
}
return buf.String()
}