// OpenFile opens a File, ie. indicates operations are to be done on this file. // // Required for fuse.FileSystem. func (k *KodingNetworkFS) OpenFile(ctx context.Context, op *fuseops.OpenFileOp) error { file, err := k.getFile(ctx, op.Inode) if err != nil { return err } file.Open() handleID := k.setEntryByHandle(file) op.Handle = handleID // KeepPageCache tells Kernel to cache this file contents or not. Say an user // opens a file on their local and then changes that same file on the VM, by // setting this to be false, the user can close and open the file to see the // changes. See https://goo.gl/vjhjFY. op.KeepPageCache = false return nil }
func (fs *Goofys) OpenFile( ctx context.Context, op *fuseops.OpenFileOp) (err error) { fs.mu.Lock() in := fs.getInodeOrDie(op.Inode) fs.mu.Unlock() fh := in.OpenFile(fs) fs.mu.Lock() defer fs.mu.Unlock() handleID := fs.nextHandleID fs.nextHandleID++ fs.fileHandles[handleID] = fh op.Handle = handleID op.KeepPageCache = true return }
// LOCKS_EXCLUDED(fs.mu) func (fs *fileSystem) OpenFile( ctx context.Context, op *fuseops.OpenFileOp) (err error) { fs.mu.Lock() defer fs.mu.Unlock() // Find the inode. in := fs.inodes[op.Inode].(*inode.FileInode) // Allocate a handle. handleID := fs.nextHandleID fs.nextHandleID++ fs.handles[handleID] = handle.NewFileHandle(in, fs.bucket) op.Handle = handleID // When we observe object generations that we didn't create, we assign them // new inode IDs. So for a given inode, all modifications go through the // kernel. Therefore it's safe to tell the kernel to keep the page cache from // open to open for a given inode. op.KeepPageCache = true return }