// LOCKS_EXCLUDED(fs.mu)
func (fs *fileSystem) ReadFile(
op *fuseops.ReadFileOp) (err error) {
// Find the inode.
fs.mu.Lock()
in := fs.inodes[op.Inode].(*inode.FileInode)
fs.mu.Unlock()
in.Lock()
defer in.Unlock()
// Serve the request.
op.Data, err = in.Read(op.Context(), op.Offset, op.Size)
return
}
func (fs *InterruptFS) ReadFile(
op *fuseops.ReadFileOp) (err error) {
// Signal that a read has been received.
fs.mu.Lock()
fs.readInFlight = true
fs.readInFlightChanged.Broadcast()
fs.mu.Unlock()
// Wait for cancellation.
done := op.Context().Done()
if done == nil {
panic("Expected non-nil channel.")
}
<-done
// Return the context's error.
err = op.Context().Err()
return
}