seaweedfs/weed/filesys/dir.go
2021-03-16 02:59:26 -07:00

575 lines
15 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
}
var _ = fs.Node(&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) Attr(ctx context.Context, attr *fuse.Attr) error {
// https://github.com/bazil/fuse/issues/196
attr.Valid = time.Second
if dir.FullPath() == dir.wfs.option.FilerMountRootPath {
dir.setRootDirAttributes(attr)
glog.V(3).Infof("root dir Attr %s, attr: %+v", dir.FullPath(), attr)
return nil
}
if err := dir.maybeLoadEntry(); err != nil {
glog.V(3).Infof("dir Attr %s,err: %+v", dir.FullPath(), err)
return err
}
// attr.Inode = util.FullPath(dir.FullPath()).AsInode()
attr.Mode = os.FileMode(dir.entry.Attributes.FileMode) | os.ModeDir
attr.Mtime = time.Unix(dir.entry.Attributes.Mtime, 0)
attr.Crtime = time.Unix(dir.entry.Attributes.Crtime, 0)
attr.Gid = dir.entry.Attributes.Gid
attr.Uid = dir.entry.Attributes.Uid
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())
if err := dir.maybeLoadEntry(); err != nil {
return err
}
return getxattr(dir.entry, req, resp)
}
func (dir *Dir) setRootDirAttributes(attr *fuse.Attr) {
// attr.Inode = 1 // filer2.FullPath(dir.Path).AsInode()
attr.Valid = time.Second
attr.Uid = dir.wfs.option.MountUid
attr.Gid = dir.wfs.option.MountGid
attr.Mode = dir.wfs.option.MountMode
attr.Crtime = dir.wfs.option.MountCtime
attr.Ctime = dir.wfs.option.MountCtime
attr.Mtime = dir.wfs.option.MountMtime
attr.Atime = dir.wfs.option.MountMtime
attr.BlockSize = blockSize
}
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, entry *filer_pb.Entry) fs.Node {
f := dir.wfs.fsNodeCache.EnsureFsNode(util.NewFullPath(dir.FullPath(), name), func() fs.Node {
return &File{
Name: name,
dir: dir,
wfs: dir.wfs,
entry: entry,
entryViewCache: nil,
}
})
f.(*File).dir = dir // in case dir node was created later
return f
}
func (dir *Dir) newDirectory(fullpath util.FullPath, entry *filer_pb.Entry) fs.Node {
d := dir.wfs.fsNodeCache.EnsureFsNode(fullpath, func() fs.Node {
return &Dir{name: entry.Name, wfs: dir.wfs, entry: entry, parent: dir}
})
d.(*Dir).parent = dir // in case dir node was created later
return d
}
func (dir *Dir) Create(ctx context.Context, req *fuse.CreateRequest,
resp *fuse.CreateResponse) (fs.Node, fs.Handle, error) {
request, err := dir.doCreateEntry(req.Name, req.Mode, req.Uid, req.Gid, req.Flags&fuse.OpenExclusive != 0)
if err != nil {
return nil, nil, err
}
var node fs.Node
if request.Entry.IsDirectory {
node = dir.newDirectory(util.NewFullPath(dir.FullPath(), req.Name), request.Entry)
return node, nil, nil
}
node = dir.newFile(req.Name, request.Entry)
file := node.(*File)
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) {
request, 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, request.Entry)
return node, nil
}
func (dir *Dir) doCreateEntry(name string, mode os.FileMode, uid, gid uint32, exlusive bool) (*filer_pb.CreateEntryRequest, error) {
request := &filer_pb.CreateEntryRequest{
Directory: dir.FullPath(),
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: exlusive,
Signatures: []int32{dir.wfs.signature},
}
glog.V(1).Infof("create %s/%s", dir.FullPath(), name)
err := dir.wfs.WithFilerClient(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", dir.FullPath(), name, err)
return fuse.EIO
}
dir.wfs.metaCache.InsertEntry(context.Background(), filer.FromPbEntry(request.Directory, request.Entry))
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,
},
}
err := dir.wfs.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
dir.wfs.mapPbIdFromLocalToFiler(newEntry)
defer dir.wfs.mapPbIdFromFilerToLocal(newEntry)
request := &filer_pb.CreateEntryRequest{
Directory: dir.FullPath(),
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", dir.FullPath(), req.Name, err)
return err
}
dir.wfs.metaCache.InsertEntry(context.Background(), filer.FromPbEntry(request.Directory, request.Entry))
return nil
})
if err == nil {
node := dir.newDirectory(util.NewFullPath(dir.FullPath(), req.Name), newEntry)
return node, nil
}
glog.V(0).Infof("mkdir %s/%s: %v", dir.FullPath(), 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
}
cachedEntry, cacheErr := dir.wfs.metaCache.FindEntry(context.Background(), fullFilePath)
if cacheErr == filer_pb.ErrNotFound {
return nil, fuse.ENOENT
}
entry := cachedEntry.ToProtoEntry()
if entry == 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
}
} else {
glog.V(4).Infof("dir Lookup cache hit %s", fullFilePath)
}
if entry != nil {
if entry.IsDirectory {
node = dir.newDirectory(fullFilePath, entry)
} else {
node = dir.newFile(req.Name, entry)
}
// resp.EntryValid = time.Second
// resp.Attr.Inode = fullFilePath.AsInode()
resp.Attr.Valid = time.Second
resp.Attr.Mtime = time.Unix(entry.Attributes.Mtime, 0)
resp.Attr.Crtime = time.Unix(entry.Attributes.Crtime, 0)
resp.Attr.Mode = os.FileMode(entry.Attributes.FileMode)
resp.Attr.Gid = entry.Attributes.Gid
resp.Attr.Uid = entry.Attributes.Uid
if entry.HardLinkCounter > 0 {
resp.Attr.Nlink = uint32(entry.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_pb.Entry, isLast bool) error {
if entry.IsDirectory {
dirent := fuse.Dirent{Name: entry.Name, Type: fuse.DT_Dir}
ret = append(ret, dirent)
} else {
dirent := fuse.Dirent{Name: entry.Name, Type: findFileType(uint16(entry.Attributes.FileMode))}
ret = append(ret, dirent)
}
return nil
}
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.ToProtoEntry(), false)
return true
})
if listErr != nil {
glog.Errorf("list meta cache: %v", listErr)
return nil, fuse.EIO
}
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 {
filePath := util.NewFullPath(dir.FullPath(), req.Name)
entry, err := filer_pb.GetEntry(dir.wfs, filePath)
if err != nil {
return err
}
if entry == nil {
return nil
}
// first, ensure the filer store can correctly delete
glog.V(3).Infof("remove file: %v", req)
isDeleteData := entry.HardLinkCounter <= 1
err = filer_pb.Remove(dir.wfs, dir.FullPath(), req.Name, isDeleteData, false, false, false, []int32{dir.wfs.signature})
if err != nil {
glog.V(3).Infof("not found remove file %s/%s: %v", dir.FullPath(), req.Name, err)
return fuse.ENOENT
}
// then, delete meta cache and fsNode cache
dir.wfs.metaCache.DeleteEntry(context.Background(), filePath)
// clear entry inside the file
fsNode := dir.wfs.fsNodeCache.GetFsNode(filePath)
dir.wfs.fsNodeCache.DeleteFsNode(filePath)
if fsNode != nil {
if file, ok := fsNode.(*File); ok {
file.clearEntry()
}
}
// remove current file handle if any
dir.wfs.handlesLock.Lock()
defer dir.wfs.handlesLock.Unlock()
inodeId := util.NewFullPath(dir.FullPath(), req.Name).AsInode()
delete(dir.wfs.handles, inodeId)
return nil
}
func (dir *Dir) removeFolder(req *fuse.RemoveRequest) error {
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, dir.FullPath(), req.Name, true, false, ignoreRecursiveErr, false, []int32{dir.wfs.signature})
if err != nil {
glog.V(0).Infof("remove %s/%s: %v", dir.FullPath(), req.Name, err)
if strings.Contains(err.Error(), "non-empty") {
return fuse.EEXIST
}
return fuse.ENOENT
}
t := util.NewFullPath(dir.FullPath(), req.Name)
dir.wfs.metaCache.DeleteEntry(context.Background(), t)
dir.wfs.fsNodeCache.DeleteFsNode(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)
if err := dir.maybeLoadEntry(); err != nil {
return err
}
if req.Valid.Mode() {
dir.entry.Attributes.FileMode = uint32(req.Mode)
}
if req.Valid.Uid() {
dir.entry.Attributes.Uid = req.Uid
}
if req.Valid.Gid() {
dir.entry.Attributes.Gid = req.Gid
}
if req.Valid.Mtime() {
dir.entry.Attributes.Mtime = req.Mtime.Unix()
}
return dir.saveEntry()
}
func (dir *Dir) Setxattr(ctx context.Context, req *fuse.SetxattrRequest) error {
glog.V(4).Infof("dir Setxattr %s: %s", dir.FullPath(), req.Name)
if err := dir.maybeLoadEntry(); err != nil {
return err
}
if err := setxattr(dir.entry, req); err != nil {
return err
}
return dir.saveEntry()
}
func (dir *Dir) Removexattr(ctx context.Context, req *fuse.RemovexattrRequest) error {
glog.V(4).Infof("dir Removexattr %s: %s", dir.FullPath(), req.Name)
if err := dir.maybeLoadEntry(); err != nil {
return err
}
if err := removexattr(dir.entry, req); err != nil {
return err
}
return dir.saveEntry()
}
func (dir *Dir) Listxattr(ctx context.Context, req *fuse.ListxattrRequest, resp *fuse.ListxattrResponse) error {
glog.V(4).Infof("dir Listxattr %s", dir.FullPath())
if err := dir.maybeLoadEntry(); err != nil {
return err
}
if err := listxattr(dir.entry, req, resp); err != nil {
return err
}
return nil
}
func (dir *Dir) Forget() {
glog.V(4).Infof("Forget dir %s", dir.FullPath())
dir.wfs.fsNodeCache.DeleteFsNode(util.FullPath(dir.FullPath()))
}
func (dir *Dir) maybeLoadEntry() error {
if dir.entry == nil {
parentDirPath, name := util.FullPath(dir.FullPath()).DirAndName()
entry, err := dir.wfs.maybeLoadEntry(parentDirPath, name)
if err != nil {
return err
}
dir.entry = entry
}
return nil
}
func (dir *Dir) saveEntry() error {
parentDir, name := util.FullPath(dir.FullPath()).DirAndName()
return dir.wfs.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
dir.wfs.mapPbIdFromLocalToFiler(dir.entry)
defer dir.wfs.mapPbIdFromFilerToLocal(dir.entry)
request := &filer_pb.UpdateEntryRequest{
Directory: parentDir,
Entry: dir.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
}
dir.wfs.metaCache.UpdateEntry(context.Background(), filer.FromPbEntry(request.Directory, request.Entry))
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()
}