Data loss on open

[Stebalien]

In Open, need to lock the file before getting the current node, not after. Otherwise, we could clobber previous updates.

That is, the following code needs to move up:

go-mfs/file.go

Lines 88 to 96 in 2019c38

	switch flags {
	case OpenReadOnly:
	fi.desclock.RLock()
	case OpenWriteOnly, OpenReadWrite:
	fi.desclock.Lock()
	default:
	// TODO: support other modes
	return nil, fmt.Errorf("mode not supported")
	}

[schomatis]

Yes, that will be handled in #32 (closing this to avoid duplicates, but please reopen if I'm conflating different issues).

[Stebalien]

Ah. I thought that issue looked familiar!