func (fs *UnionFs) Open(name string, flags uint32, context *fuse.Context) (fuseFile fuse.File, status fuse.Status) { if name == _DROP_CACHE { if flags&fuse.O_ANYWRITE != 0 { log.Println("Forced cache drop on", fs) fs.DropBranchCache(nil) fs.DropDeletionCache() fs.DropSubFsCaches() fs.nodeFs.ForgetClientInodes() } return fuse.NewDevNullFile(), fuse.OK } r := fs.getBranch(name) if r.branch < 0 { // This should not happen, as a GetAttr() should have // already verified existence. log.Println("UnionFs: open of non-existent file:", name) return nil, fuse.ENOENT } if flags&fuse.O_ANYWRITE != 0 && r.branch > 0 { code := fs.Promote(name, r, context) if code != fuse.OK { return nil, code } r.branch = 0 now := time.Now() r.attr.SetTimes(nil, &now, nil) fs.branchCache.Set(name, r) } fuseFile, status = fs.fileSystems[r.branch].Open(name, uint32(flags), context) if fuseFile != nil { fuseFile = fs.newUnionFsFile(fuseFile, r.branch) } return fuseFile, status }
func (fs *AutoUnionFs) Open(path string, flags uint32, context *fuse.Context) (fuse.File, fuse.Status) { if path == filepath.Join(_STATUS, _DEBUG) { if flags&fuse.O_ANYWRITE != 0 { return nil, fuse.EPERM } return fuse.NewDataFile([]byte(fs.DebugData())), fuse.OK } if path == filepath.Join(_STATUS, _VERSION) { if flags&fuse.O_ANYWRITE != 0 { return nil, fuse.EPERM } return fuse.NewDataFile([]byte(fuse.Version())), fuse.OK } if path == filepath.Join(_CONFIG, _SCAN_CONFIG) { if flags&fuse.O_ANYWRITE != 0 { fs.updateKnownFses() } return fuse.NewDevNullFile(), fuse.OK } return nil, fuse.ENOENT }