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

[Bernd Schubert <bernd.schubert@fastmail.fm>]

On 2/19/24 20:38, 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.

Why exactly bogus?

reconnect_path()
		if (IS_ROOT(dentry))
			parent = reconnect_one(mnt, dentry, nbuf);

reconnect_one()
		if (mnt->mnt_sb->s_export_op->get_parent)
			parent = mnt->mnt_sb->s_export_op->get_parent(dentry);


fuse_get_parent()
	if (!fc->export_support)
		return ERR_PTR(-ESTALE);

	err = fuse_lookup_name(child_inode->i_sb, get_node_id(child_inode),
			       &dotdot_name, &outarg, &inode);



Thanks,
Bernd