mirror of
https://github.com/seaweedfs/seaweedfs.git
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74 lines
2.0 KiB
Go
74 lines
2.0 KiB
Go
package mount
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import (
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"context"
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"github.com/hanwen/go-fuse/v2/fuse"
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"github.com/seaweedfs/seaweedfs/weed/filer"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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"github.com/seaweedfs/seaweedfs/weed/mount/meta_cache"
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"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
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)
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// Lookup is called by the kernel when the VFS wants to know
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// about a file inside a directory. Many lookup calls can
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// occur in parallel, but only one call happens for each (dir,
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// name) pair.
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func (wfs *WFS) Lookup(cancel <-chan struct{}, header *fuse.InHeader, name string, out *fuse.EntryOut) (code fuse.Status) {
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if s := checkName(name); s != fuse.OK {
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return s
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}
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dirPath, code := wfs.inodeToPath.GetPath(header.NodeId)
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if code != fuse.OK {
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return
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}
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fullFilePath := dirPath.Child(name)
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visitErr := meta_cache.EnsureVisited(wfs.metaCache, wfs, dirPath)
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if visitErr != nil {
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glog.Errorf("dir Lookup %s: %v", dirPath, visitErr)
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return fuse.EIO
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}
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localEntry, cacheErr := wfs.metaCache.FindEntry(context.Background(), fullFilePath)
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if cacheErr == filer_pb.ErrNotFound {
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return fuse.ENOENT
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}
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if localEntry == nil {
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// glog.V(3).Infof("dir Lookup cache miss %s", fullFilePath)
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entry, err := filer_pb.GetEntry(wfs, fullFilePath)
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if err != nil {
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glog.V(1).Infof("dir GetEntry %s: %v", fullFilePath, err)
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return fuse.ENOENT
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}
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localEntry = filer.FromPbEntry(string(dirPath), entry)
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} else {
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glog.V(4).Infof("dir Lookup cache hit %s", fullFilePath)
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}
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if localEntry == nil {
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return fuse.ENOENT
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}
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inode := wfs.inodeToPath.Lookup(fullFilePath, localEntry.Crtime.Unix(), localEntry.IsDirectory(), len(localEntry.HardLinkId) > 0, localEntry.Inode, true)
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if fh, found := wfs.fhmap.FindFileHandle(inode); found {
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fh.entryLock.Lock()
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if fh.entry != nil {
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glog.V(4).Infof("lookup opened file %s size %d", dirPath.Child(localEntry.Name()), filer.FileSize(fh.entry))
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localEntry = filer.FromPbEntry(string(dirPath), fh.entry)
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}
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fh.entryLock.Unlock()
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}
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wfs.outputFilerEntry(out, inode, localEntry)
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return fuse.OK
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}
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