Re: [PATCH v3 bpf-next 2/3] net: netfilter: add bpf_ct_set_nat_info kfunc helper

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Hi Lorenzo,

On Wed, Sep 21, 2022 at 06:48:26PM +0200, Lorenzo Bianconi wrote:
> Introduce bpf_ct_set_nat_info kfunc helper in order to set source and
> destination nat addresses/ports in a new allocated ct entry not inserted
> in the connection tracking table yet.
> 
> Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>

This commit is now in -next as commit 0fabd2aa199f ("net: netfilter: add
bpf_ct_set_nat_info kfunc helper"). Unfortunately, it introduces a
circular dependency when I build with my distribution's (Arch Linux)
configuration:

$ curl -LSso .config https://github.com/archlinux/svntogit-packages/raw/packages/linux/trunk/config

$ make -skj"$(nproc)" INSTALL_MOD_PATH=rootfs INSTALL_MOD_STRIP=1 olddefconfig all modules_install
...
WARN: multiple IDs found for 'nf_conn': 99333, 114119 - using 99333
WARN: multiple IDs found for 'nf_conn': 99333, 115663 - using 99333
WARN: multiple IDs found for 'nf_conn': 99333, 117330 - using 99333
WARN: multiple IDs found for 'nf_conn': 99333, 119583 - using 99333
depmod: ERROR: Cycle detected: nf_conntrack -> nf_nat -> nf_conntrack
depmod: ERROR: Found 2 modules in dependency cycles!
...

The WARN lines are there before this change but I figured they were
worth including anyways, in case they factor in here.

If there is any more information I can provide or patches I can test,
please let me know!

Cheers,
Nathan



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