nft_rhash_walk, rhashtable and resize event

Hi,

I try to find some ways that fits my use case of iterating a
rhashtable. I found [0] but it somehow tries to skip objects again if
a rhashtable resize event occurs during a hash walk. It does that by
skipping the already iterated objects according to a counter that is
tracked, see [0]:

if (iter->count < iter->skip)

from my understanding.

My question is here? Is that allowed to do because a resize event may
change the order how to iterate over a rhashtable.

Thanks.

- Alex

[0] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/net/netfilter/nft_set_hash.c?h=v6.6-rc1#n257