Re: [fuse-devel] Proxmox + NFS w/ exported FUSE = EIO

[Antonio SJ Musumeci <trapexit@spawn.link>]

On 2/19/24 13:38, Miklos Szeredi wrote:
> On Mon, 19 Feb 2024 at 20:05, Antonio SJ Musumeci <trapexit@spawn.link> wrote:
> 
>> This is what I see from the kernel:
>>
>> lookup(nodeid=3, name=.);
>> lookup(nodeid=3, name=..);
>> lookup(nodeid=1, name=dir2);
>> lookup(nodeid=1, name=..);
>> forget(nodeid=3);
>> forget(nodeid=1);
> 
> This is really weird.  It's a kernel bug, no arguments, because kernel
> should never send a forget against the root inode.   But that
> lookup(nodeid=1, name=..); already looks bogus.
> 
> Will try to untangle this by code review, but instructions to
> reproduce could be a big help.
> 
> Thanks,
> Miklos

Thank you.

I'll try to build something bespoke against current libfuse.

That forget(nodeid=1) is coming in after my code detects that 
lookup(nodeid=1, name="..") and returns -ENOENT. Which in a way makes 
sense. Though it seems to happen no matter what I return. Returning the 
same as lookup(nodeid=1, name=".") results in the same behavior. I've 
not tried creating a fake node with a new nodeid/generation though.