[fuse-devel] Re: RELEASE on "-"

[David S. <ds...@ja...>]

On Mon, May 16, 2005 at 05:14:46PM -0400, David Shaw wrote:
> Saw an interesting occurance today.  There were two OPENs on the same
> file (one O_RDONLY, one O_WRONLY).  Data was successfully written to
> the O_WRONLY fd, and read back from the O_RDONLY fd.
> 
> Things got odd when the files were closed.  The O_WRONLY file got a
> FLUSH and a RELEASE as normal.  Then the O_RDONLY file got just a
> RELEASE, but with a pathname of "-".

Did some more digging here, and I can reproduce this with fusexmp when
hard_remove is set.  NFS is not a factor.

1) In window 1, cat > /file/in/fuse
2) In window 2, rm /file/in/fuse
3) In window 1, ctrl-D

Looks like the unlink calls remove_node, even though the file is still
in use (from the open).  The end result after the ctrl-D is that flush
fails with ENOENT, and release gets called with a path of "-".

David