seaweedfs/weed/filesys/dir.go
2019-05-03 00:24:35 -07:00

384 lines
9.1 KiB
Go

package filesys
import (
"context"
"os"
"path"
"time"
"github.com/chrislusf/seaweedfs/weed/filer2"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/seaweedfs/fuse"
"github.com/seaweedfs/fuse/fs"
)
type Dir struct {
Path string
wfs *WFS
attributes *filer_pb.FuseAttributes
}
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{})
var _ = fs.NodeSetattrer(&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.Path == dir.wfs.option.FilerMountRootPath {
attr.Uid = dir.wfs.option.MountUid
attr.Gid = dir.wfs.option.MountGid
attr.Mode = dir.wfs.option.MountMode
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
}
entry, err := filer2.GetEntry(ctx, dir.wfs, dir.Path)
if err != nil {
glog.V(2).Infof("read dir %s attr: %v, error: %v", dir.Path, dir.attributes, err)
return err
}
dir.attributes = entry.Attributes
glog.V(2).Infof("dir %s: %v perm: %v", dir.Path, dir.attributes, os.FileMode(dir.attributes.FileMode))
attr.Mode = os.FileMode(dir.attributes.FileMode) | os.ModeDir
attr.Mtime = time.Unix(dir.attributes.Mtime, 0)
attr.Ctime = time.Unix(dir.attributes.Crtime, 0)
attr.Gid = dir.attributes.Gid
attr.Uid = dir.attributes.Uid
return nil
}
func (dir *Dir) newFile(name string, entry *filer_pb.Entry) *File {
return &File{
Name: name,
dir: dir,
wfs: dir.wfs,
entry: entry,
entryViewCache: nil,
}
}
func (dir *Dir) Create(ctx context.Context, req *fuse.CreateRequest,
resp *fuse.CreateResponse) (fs.Node, fs.Handle, 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.option.Collection,
Replication: dir.wfs.option.Replication,
TtlSec: dir.wfs.option.TtlSec,
},
},
}
glog.V(1).Infof("create: %v", request)
if request.Entry.IsDirectory {
if err := dir.wfs.WithFilerClient(ctx, func(client filer_pb.SeaweedFilerClient) error {
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
}); err != nil {
return nil, nil, err
}
}
file := dir.newFile(req.Name, request.Entry)
if !request.Entry.IsDirectory {
file.isOpen = true
}
fh := dir.wfs.AcquireHandle(file, req.Uid, req.Gid)
fh.dirtyMetadata = true
return file, fh, nil
}
func (dir *Dir) Mkdir(ctx context.Context, req *fuse.MkdirRequest) (fs.Node, error) {
err := dir.wfs.WithFilerClient(ctx, 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
fullFilePath := path.Join(dir.Path, req.Name)
item := dir.wfs.listDirectoryEntriesCache.Get(fullFilePath)
if item != nil && !item.Expired() {
entry = item.Value().(*filer_pb.Entry)
}
if entry == nil {
entry, err = filer2.GetEntry(ctx, dir.wfs, fullFilePath)
if err != nil {
return nil, err
}
}
if entry != nil {
if entry.IsDirectory {
node = &Dir{Path: path.Join(dir.Path, req.Name), wfs: dir.wfs, attributes: entry.Attributes}
} else {
node = dir.newFile(req.Name, entry)
}
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(ctx, func(client filer_pb.SeaweedFilerClient) error {
paginationLimit := 1024
remaining := dir.wfs.option.DirListingLimit
lastEntryName := ""
for remaining >= 0 {
request := &filer_pb.ListEntriesRequest{
Directory: dir.Path,
StartFromFileName: lastEntryName,
Limit: uint32(paginationLimit),
}
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
}
cacheTtl := estimatedCacheTtl(len(resp.Entries))
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(path.Join(dir.Path, entry.Name), entry, cacheTtl)
lastEntryName = entry.Name
}
remaining -= len(resp.Entries)
if len(resp.Entries) < paginationLimit {
break
}
}
return nil
})
return ret, err
}
func (dir *Dir) Remove(ctx context.Context, req *fuse.RemoveRequest) error {
if !req.Dir {
return dir.removeOneFile(ctx, req)
}
return dir.removeFolder(ctx, req)
}
func (dir *Dir) removeOneFile(ctx context.Context, req *fuse.RemoveRequest) error {
entry, err := filer2.GetEntry(ctx, dir.wfs, path.Join(dir.Path, req.Name))
if err != nil {
return err
}
dir.wfs.deleteFileChunks(ctx, entry.Chunks)
return dir.wfs.WithFilerClient(ctx, func(client filer_pb.SeaweedFilerClient) error {
request := &filer_pb.DeleteEntryRequest{
Directory: dir.Path,
Name: req.Name,
IsDeleteData: false,
}
glog.V(3).Infof("remove file: %v", request)
_, err := client.DeleteEntry(ctx, request)
if err != nil {
glog.V(3).Infof("remove file %s/%s: %v", dir.Path, req.Name, err)
return fuse.ENOENT
}
dir.wfs.listDirectoryEntriesCache.Delete(path.Join(dir.Path, req.Name))
return nil
})
}
func (dir *Dir) removeFolder(ctx context.Context, req *fuse.RemoveRequest) error {
return dir.wfs.WithFilerClient(ctx, func(client filer_pb.SeaweedFilerClient) error {
request := &filer_pb.DeleteEntryRequest{
Directory: dir.Path,
Name: req.Name,
IsDeleteData: true,
}
glog.V(3).Infof("remove directory entry: %v", request)
_, err := client.DeleteEntry(ctx, request)
if err != nil {
glog.V(3).Infof("remove %s/%s: %v", dir.Path, req.Name, err)
return fuse.ENOENT
}
dir.wfs.listDirectoryEntriesCache.Delete(path.Join(dir.Path, req.Name))
return nil
})
}
func (dir *Dir) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *fuse.SetattrResponse) error {
if dir.attributes == nil {
return nil
}
glog.V(3).Infof("%v dir setattr %+v, fh=%d", dir.Path, req, req.Handle)
if req.Valid.Mode() {
dir.attributes.FileMode = uint32(req.Mode)
}
if req.Valid.Uid() {
dir.attributes.Uid = req.Uid
}
if req.Valid.Gid() {
dir.attributes.Gid = req.Gid
}
if req.Valid.Mtime() {
dir.attributes.Mtime = req.Mtime.Unix()
}
parentDir, name := filer2.FullPath(dir.Path).DirAndName()
return dir.wfs.WithFilerClient(ctx, func(client filer_pb.SeaweedFilerClient) error {
request := &filer_pb.UpdateEntryRequest{
Directory: parentDir,
Entry: &filer_pb.Entry{
Name: name,
Attributes: dir.attributes,
},
}
glog.V(1).Infof("set attr directory entry: %v", request)
_, err := client.UpdateEntry(ctx, request)
if err != nil {
glog.V(0).Infof("UpdateEntry %s: %v", dir.Path, err)
return fuse.EIO
}
dir.wfs.listDirectoryEntriesCache.Delete(dir.Path)
return nil
})
}
func estimatedCacheTtl(numEntries int) time.Duration {
if numEntries < 100 {
// 30 ms per entry
return 3 * time.Second
}
if numEntries < 1000 {
// 10 ms per entry
return 10 * time.Second
}
if numEntries < 10000 {
// 10 ms per entry
return 100 * time.Second
}
// 2 ms per entry
return time.Duration(numEntries*2) * time.Millisecond
}