Re: [Avf-fuse-dev] protocol error

[Miklos S. <mi...@sz...>]

> I'm having trouble with file writing. I can 
> "echo something > file" to a file, but 
> "cp file something" or "cat something > file"
> gives a protocol error.

Protocol error is something bad between the library and the kernel,
look at dmesg output for more details.  It's not something that can be
caused by a missing operation in the filesystem.  My guess is that
it's probably a version mismatch between the kernel module and the
library.  Try compiling and installing everything from fresh.

> I'm using OWFS. Trying the same thing with fusexmp works without an
> error.
> 
> I suspect that some one of the setattr call, or truncate or flush is the
> culprit, but it's not clear what the critical components are for file
> copying.
> 
> We really need a table of calls required for common file operations
> (like grep, find, cat, cp, head, tail, mv).

Well, turn on debugging for fusexmp, and look at what kind of
operations are called.

Miklos