mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-07-02 15:16:51 +02:00
143 lines
2.7 KiB
Go
143 lines
2.7 KiB
Go
package filesys
|
|
|
|
import (
|
|
"context"
|
|
"path/filepath"
|
|
|
|
"github.com/chrislusf/seaweedfs/weed/glog"
|
|
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
|
|
"github.com/seaweedfs/fuse"
|
|
)
|
|
|
|
func getxattr(entry *filer_pb.Entry, req *fuse.GetxattrRequest, resp *fuse.GetxattrResponse) error {
|
|
|
|
if entry == nil {
|
|
return fuse.ErrNoXattr
|
|
}
|
|
if entry.Extended == nil {
|
|
return fuse.ErrNoXattr
|
|
}
|
|
data, found := entry.Extended[req.Name]
|
|
if !found {
|
|
return fuse.ErrNoXattr
|
|
}
|
|
if req.Position < uint32(len(data)) {
|
|
size := req.Size
|
|
if req.Position+size >= uint32(len(data)) {
|
|
size = uint32(len(data)) - req.Position
|
|
}
|
|
if size == 0 {
|
|
resp.Xattr = data[req.Position:]
|
|
} else {
|
|
resp.Xattr = data[req.Position : req.Position+size]
|
|
}
|
|
}
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
func setxattr(entry *filer_pb.Entry, req *fuse.SetxattrRequest) error {
|
|
|
|
if entry == nil {
|
|
return fuse.EIO
|
|
}
|
|
|
|
if entry.Extended == nil {
|
|
entry.Extended = make(map[string][]byte)
|
|
}
|
|
data, _ := entry.Extended[req.Name]
|
|
|
|
newData := make([]byte, int(req.Position)+len(req.Xattr))
|
|
|
|
copy(newData, data)
|
|
|
|
copy(newData[int(req.Position):], req.Xattr)
|
|
|
|
entry.Extended[req.Name] = newData
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
func removexattr(entry *filer_pb.Entry, req *fuse.RemovexattrRequest) error {
|
|
|
|
if entry == nil {
|
|
return fuse.ErrNoXattr
|
|
}
|
|
|
|
if entry.Extended == nil {
|
|
return fuse.ErrNoXattr
|
|
}
|
|
|
|
_, found := entry.Extended[req.Name]
|
|
|
|
if !found {
|
|
return fuse.ErrNoXattr
|
|
}
|
|
|
|
delete(entry.Extended, req.Name)
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
func listxattr(entry *filer_pb.Entry, req *fuse.ListxattrRequest, resp *fuse.ListxattrResponse) error {
|
|
|
|
if entry == nil {
|
|
return fuse.EIO
|
|
}
|
|
|
|
for k := range entry.Extended {
|
|
resp.Append(k)
|
|
}
|
|
|
|
size := req.Size
|
|
if req.Position+size >= uint32(len(resp.Xattr)) {
|
|
size = uint32(len(resp.Xattr)) - req.Position
|
|
}
|
|
|
|
if size == 0 {
|
|
resp.Xattr = resp.Xattr[req.Position:]
|
|
} else {
|
|
resp.Xattr = resp.Xattr[req.Position : req.Position+size]
|
|
}
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
func (wfs *WFS) maybeLoadEntry(ctx context.Context, dir, name string) (entry *filer_pb.Entry, err error) {
|
|
|
|
fullpath := filepath.Join(dir, name)
|
|
item := wfs.listDirectoryEntriesCache.Get(fullpath)
|
|
if item != nil && !item.Expired() {
|
|
entry = item.Value().(*filer_pb.Entry)
|
|
return
|
|
}
|
|
glog.V(3).Infof("read entry cache miss %s", fullpath)
|
|
|
|
err = wfs.WithFilerClient(ctx, func(client filer_pb.SeaweedFilerClient) error {
|
|
|
|
request := &filer_pb.LookupDirectoryEntryRequest{
|
|
Name: name,
|
|
Directory: dir,
|
|
}
|
|
|
|
resp, err := client.LookupDirectoryEntry(ctx, request)
|
|
if err != nil {
|
|
glog.V(3).Infof("file attr read file %v: %v", request, err)
|
|
return fuse.ENOENT
|
|
}
|
|
|
|
entry = resp.Entry
|
|
if entry != nil {
|
|
wfs.listDirectoryEntriesCache.Set(fullpath, entry, wfs.option.EntryCacheTtl)
|
|
}
|
|
|
|
return nil
|
|
})
|
|
|
|
return
|
|
}
|