seaweedfs/weed/filesys/dir.go
2018-06-11 23:29:09 -07:00

275 lines
6.5 KiB
Go

package filesys
import (
"context"
"os"
"path"
"bazil.org/fuse"
"bazil.org/fuse/fs"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"path/filepath"
"time"
)
type Dir struct {
Path string
wfs *WFS
}
var _ = fs.Node(&Dir{})
var _ = fs.NodeCreater(&Dir{})
var _ = fs.NodeMkdirer(&Dir{})
var _ = fs.NodeRequestLookuper(&Dir{})
var _ = fs.HandleReadDirAller(&Dir{})
var _ = fs.NodeRemover(&Dir{})
var _ = fs.NodeRenamer(&Dir{})
func (dir *Dir) Attr(context context.Context, attr *fuse.Attr) error {
if dir.Path == "/" {
attr.Valid = time.Second
attr.Mode = os.ModeDir | 0777
return nil
}
item := dir.wfs.listDirectoryEntriesCache.Get(dir.Path)
if item != nil && !item.Expired() {
entry := item.Value().(*filer_pb.Entry)
attr.Mtime = time.Unix(entry.Attributes.Mtime, 0)
attr.Ctime = time.Unix(entry.Attributes.Crtime, 0)
attr.Mode = os.FileMode(entry.Attributes.FileMode)
attr.Gid = entry.Attributes.Gid
attr.Uid = entry.Attributes.Uid
return nil
}
parent, name := filepath.Split(dir.Path)
var attributes *filer_pb.FuseAttributes
err := dir.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
request := &filer_pb.GetEntryAttributesRequest{
Name: name,
ParentDir: parent,
}
glog.V(1).Infof("read dir %s attr: %v", dir.Path, request)
resp, err := client.GetEntryAttributes(context, request)
if err != nil {
glog.V(0).Infof("read dir %s attr %v: %v", dir.Path, request, err)
return err
}
attributes = resp.Attributes
return nil
})
if err != nil {
return err
}
// glog.V(1).Infof("dir %s: %v", dir.Path, attributes)
// glog.V(1).Infof("dir %s permission: %v", dir.Path, os.FileMode(attributes.FileMode))
attr.Mode = os.FileMode(attributes.FileMode) | os.ModeDir
if dir.Path == "/" && attributes.FileMode == 0 {
attr.Valid = time.Second
}
attr.Mtime = time.Unix(attributes.Mtime, 0)
attr.Ctime = time.Unix(attributes.Crtime, 0)
attr.Gid = attributes.Gid
attr.Uid = attributes.Uid
return nil
}
func (dir *Dir) newFile(name string, chunks []*filer_pb.FileChunk) *File {
return &File{
Name: name,
dir: dir,
wfs: dir.wfs,
// attributes: &filer_pb.FuseAttributes{},
Chunks: chunks,
}
}
func (dir *Dir) Create(ctx context.Context, req *fuse.CreateRequest,
resp *fuse.CreateResponse) (fs.Node, fs.Handle, error) {
err := dir.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
request := &filer_pb.CreateEntryRequest{
Directory: dir.Path,
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),
Uid: req.Uid,
Gid: req.Gid,
Collection: dir.wfs.collection,
Replication: dir.wfs.replication,
TtlSec: dir.wfs.ttlSec,
},
},
}
glog.V(1).Infof("create: %v", request)
if _, err := client.CreateEntry(ctx, request); err != nil {
glog.V(0).Infof("create %s/%s: %v", dir.Path, req.Name, err)
return fuse.EIO
}
return nil
})
if err == nil {
file := dir.newFile(req.Name, nil)
file.isOpen = true
return file, dir.wfs.AcquireHandle(file, req.Uid, req.Gid), nil
}
return nil, nil, err
}
func (dir *Dir) Mkdir(ctx context.Context, req *fuse.MkdirRequest) (fs.Node, error) {
err := dir.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
request := &filer_pb.CreateEntryRequest{
Directory: dir.Path,
Entry: &filer_pb.Entry{
Name: req.Name,
IsDirectory: true,
Attributes: &filer_pb.FuseAttributes{
Mtime: time.Now().Unix(),
Crtime: time.Now().Unix(),
FileMode: uint32(req.Mode),
Uid: req.Uid,
Gid: req.Gid,
},
},
}
glog.V(1).Infof("mkdir: %v", request)
if _, err := client.CreateEntry(ctx, request); err != nil {
glog.V(0).Infof("mkdir %s/%s: %v", dir.Path, req.Name, err)
return fuse.EIO
}
return nil
})
if err == nil {
node := &Dir{Path: path.Join(dir.Path, req.Name), wfs: dir.wfs}
return node, nil
}
return nil, err
}
func (dir *Dir) Lookup(ctx context.Context, req *fuse.LookupRequest, resp *fuse.LookupResponse) (node fs.Node, err error) {
var entry *filer_pb.Entry
err = dir.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
request := &filer_pb.LookupDirectoryEntryRequest{
Directory: dir.Path,
Name: req.Name,
}
glog.V(4).Infof("lookup directory entry: %v", request)
resp, err := client.LookupDirectoryEntry(ctx, request)
if err != nil {
// glog.V(0).Infof("lookup %s/%s: %v", dir.Path, name, err)
return fuse.ENOENT
}
entry = resp.Entry
return nil
})
if entry != nil {
if entry.IsDirectory {
node = &Dir{Path: path.Join(dir.Path, req.Name), wfs: dir.wfs}
} else {
node = dir.newFile(req.Name, entry.Chunks)
}
resp.EntryValid = time.Duration(0)
resp.Attr.Mtime = time.Unix(entry.Attributes.Mtime, 0)
resp.Attr.Ctime = 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
return node, nil
}
return nil, fuse.ENOENT
}
func (dir *Dir) ReadDirAll(ctx context.Context) (ret []fuse.Dirent, err error) {
err = dir.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
request := &filer_pb.ListEntriesRequest{
Directory: dir.Path,
}
glog.V(4).Infof("read directory: %v", request)
resp, err := client.ListEntries(ctx, request)
if err != nil {
glog.V(0).Infof("list %s: %v", dir.Path, err)
return fuse.EIO
}
for _, entry := range resp.Entries {
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: fuse.DT_File}
ret = append(ret, dirent)
}
dir.wfs.listDirectoryEntriesCache.Set(dir.Path+"/"+entry.Name, entry, 300*time.Millisecond)
}
return nil
})
return ret, err
}
func (dir *Dir) Remove(ctx context.Context, req *fuse.RemoveRequest) error {
return dir.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
request := &filer_pb.DeleteEntryRequest{
Directory: dir.Path,
Name: req.Name,
IsDirectory: req.Dir,
IsDeleteData: true,
}
glog.V(1).Infof("remove directory entry: %v", request)
_, err := client.DeleteEntry(ctx, request)
if err != nil {
glog.V(0).Infof("remove %s/%s: %v", dir.Path, req.Name, err)
return fuse.EIO
}
return nil
})
}