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package filesys
import (
"context"
"strings"
"github.com/chrislusf/seaweedfs/weed/filer2"
"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 := filer2.NewFullPath(dir, name)
entry = wfs.cacheGet(fullpath)
if entry != nil {
return
}
// glog.V(3).Infof("read entry cache miss %s", fullpath)
err = wfs.WithFilerClient(ctx, func(ctx context.Context, client filer_pb.SeaweedFilerClient) error {
request := &filer_pb.LookupDirectoryEntryRequest{
Name: name,
Directory: dir,
}
resp, err := client.LookupDirectoryEntry(ctx, request)
if err != nil || resp == nil || resp.Entry == nil {
if err == filer2.ErrNotFound || strings.Contains(err.Error(), filer2.ErrNotFound.Error()) {
glog.V(3).Infof("file attr read not found file %v: %v", request, err)
return fuse.ENOENT
}
glog.V(3).Infof("attr read %v: %v", request, err)
return fuse.EIO
}
entry = resp.Entry
wfs.cacheSet(fullpath, entry, wfs.option.EntryCacheTtl)
return nil
})
return
}
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