Re: [RFC] netfilter: nf_tables: ignore -EOPNOTSUPP on flowtable device offload setup

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On 01.09.23 10:39, Pablo Neira Ayuso wrote:
Hi Felix,

On Thu, Aug 31, 2023 at 10:14:20PM +0200, Felix Fietkau wrote:
On many embedded devices, it is common to configure flowtable offloading for
a mix of different devices, some of which have hardware offload support and
some of which don't.
The current code limits the ability of user space to properly set up such a
configuration by only allowing adding devices with hardware offload support to
a offload-enabled flowtable.
Given that offload-enabled flowtables also imply fallback to pure software
offloading, this limitation makes little sense.
Fix it by not bailing out when the offload setup returns -EOPNOTSUPP

Would you send a v2 to untoggle the offload flag when listing the
ruleset if EOPNOTSUPP is reported? Thus, the user knows that no
hardware offload is being used.

Wouldn't that mess up further updates to the flowtable? From what I can tell, when updating a flow table, changing its offload flag is not supported.

- Felix

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