netdev - Re: [PATCH bpf-next v4 1/2] bpf: add skcipher API support to TC/XDP programs

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Date: Fri, 17 Nov 2023 11:59:31 +0800
From: Herbert Xu <herbert@...dor.apana.org.au>
To: Vadim Fedorenko <vadfed@...a.com>
Cc: vadim.fedorenko@...ux.dev, kuba@...nel.org, martin.lau@...ux.dev,
	andrii@...nel.org, ast@...nel.org, mykolal@...com, vadfed@...a.com,
	bpf@...r.kernel.org, netdev@...r.kernel.org,
	linux-crypto@...r.kernel.org
Subject: Re: [PATCH bpf-next v4 1/2] bpf: add skcipher API support to TC/XDP
 programs

Vadim Fedorenko <vadfed@...a.com> wrote:
> Add crypto API support to BPF to be able to decrypt or encrypt packets
> in TC/XDP BPF programs. Only symmetric key ciphers are supported for
> now. Special care should be taken for initialization part of crypto algo
> because crypto_alloc_sync_skcipher() doesn't work with preemtion
> disabled, it can be run only in sleepable BPF program. Also async crypto
> is not supported because of the very same issue - TC/XDP BPF programs
> are not sleepable.
> 
> Signed-off-by: Vadim Fedorenko <vadfed@...a.com>

Please use the newly introduced lskcipher interface instead of
skcipher.

Thanks,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt