From: Martin KaFai Lau <martin.lau@linux.dev>
To: Stanislav Fomichev <sdf@google.com>
Cc: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
song@kernel.org, yhs@fb.com, john.fastabend@gmail.com,
kpsingh@kernel.org, haoluo@google.com, jolsa@kernel.org,
David Ahern <dsahern@gmail.com>, Jakub Kicinski <kuba@kernel.org>,
Willem de Bruijn <willemb@google.com>,
Jesper Dangaard Brouer <brouer@redhat.com>,
Anatoly Burakov <anatoly.burakov@intel.com>,
Alexander Lobakin <alexandr.lobakin@intel.com>,
Magnus Karlsson <magnus.karlsson@gmail.com>,
Maryam Tahhan <mtahhan@redhat.com>,
xdp-hints@xdp-project.net, netdev@vger.kernel.org,
bpf@vger.kernel.org
Subject: Re: [PATCH bpf-next v5 07/17] bpf: XDP metadata RX kfuncs
Date: Thu, 22 Dec 2022 16:31:26 -0800 [thread overview]
Message-ID: <00810419-c76c-32da-16a6-27c1029e3a60@linux.dev> (raw)
In-Reply-To: <20221220222043.3348718-8-sdf@google.com>
On 12/20/22 2:20 PM, Stanislav Fomichev wrote:
> diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
> index bafcb7a3ae6f..6d81b14361e3 100644
> --- a/kernel/bpf/core.c
> +++ b/kernel/bpf/core.c
> @@ -2097,6 +2097,14 @@ bool bpf_prog_map_compatible(struct bpf_map *map,
> if (fp->kprobe_override)
> return false;
>
> + /* XDP programs inserted into maps are not guaranteed to run on
> + * a particular netdev (and can run outside driver context entirely
> + * in the case of devmap and cpumap). Until device checks
> + * are implemented, prohibit adding dev-bound programs to program maps.
> + */
> + if (bpf_prog_is_dev_bound(fp->aux))
> + return false;
> +
There is a recent change in the same function in the bpf tree, commit
1c123c567fb1. fyi.
[ ... ]
> diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
> index fdfdcab4a59d..320451a0be3e 100644
> --- a/kernel/bpf/verifier.c
> +++ b/kernel/bpf/verifier.c
> @@ -2081,6 +2081,22 @@ static struct btf *find_kfunc_desc_btf(struct bpf_verifier_env *env, s16 offset)
> return btf_vmlinux ?: ERR_PTR(-ENOENT);
> }
>
> +int bpf_dev_bound_kfunc_check(struct bpf_verifier_env *env,
> + struct bpf_prog_aux *prog_aux)
nit. Move the dev bound related function to offload.c. &env->log can be passed
instead of env and then use bpf_log().
Others lgtm.
next prev parent reply other threads:[~2022-12-23 0:31 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-20 22:20 [PATCH bpf-next v5 00/17] xdp: hints via kfuncs Stanislav Fomichev
2022-12-20 22:20 ` [PATCH bpf-next v5 01/17] bpf: Document XDP RX metadata Stanislav Fomichev
2022-12-28 17:25 ` David Vernet
2023-01-03 22:23 ` Stanislav Fomichev
2023-01-04 16:02 ` David Vernet
2022-12-20 22:20 ` [PATCH bpf-next v5 02/17] bpf: Rename bpf_{prog,map}_is_dev_bound to is_offloaded Stanislav Fomichev
2022-12-20 22:20 ` [PATCH bpf-next v5 03/17] bpf: Move offload initialization into late_initcall Stanislav Fomichev
2022-12-20 22:20 ` [PATCH bpf-next v5 04/17] bpf: Reshuffle some parts of bpf/offload.c Stanislav Fomichev
2022-12-20 22:20 ` [PATCH bpf-next v5 05/17] bpf: Introduce device-bound XDP programs Stanislav Fomichev
2022-12-23 0:19 ` Martin KaFai Lau
2022-12-23 4:06 ` Stanislav Fomichev
2022-12-20 22:20 ` [PATCH bpf-next v5 06/17] selftests/bpf: Update expected test_offload.py messages Stanislav Fomichev
2022-12-20 22:20 ` [PATCH bpf-next v5 07/17] bpf: XDP metadata RX kfuncs Stanislav Fomichev
[not found] ` <202212211311.e2ZWQLue-lkp@intel.com>
2022-12-21 17:49 ` Stanislav Fomichev
2022-12-23 0:31 ` Martin KaFai Lau [this message]
2022-12-23 4:06 ` Stanislav Fomichev
2022-12-27 20:33 ` David Vernet
2023-01-03 22:23 ` Stanislav Fomichev
2023-01-03 22:35 ` David Vernet
2022-12-20 22:20 ` [PATCH bpf-next v5 08/17] bpf: Support consuming XDP HW metadata from fext programs Stanislav Fomichev
2022-12-23 0:37 ` Martin KaFai Lau
2022-12-23 4:06 ` Stanislav Fomichev
2023-01-04 1:51 ` Martin KaFai Lau
2023-01-04 3:59 ` Stanislav Fomichev
2022-12-20 22:20 ` [PATCH bpf-next v5 09/17] veth: Introduce veth_xdp_buff wrapper for xdp_buff Stanislav Fomichev
2022-12-20 22:20 ` [PATCH bpf-next v5 10/17] veth: Support RX XDP metadata Stanislav Fomichev
2022-12-20 22:20 ` [PATCH bpf-next v5 11/17] selftests/bpf: Verify xdp_metadata xdp->af_xdp path Stanislav Fomichev
2022-12-23 0:40 ` Martin KaFai Lau
2022-12-23 4:06 ` Stanislav Fomichev
2023-01-04 2:05 ` Martin KaFai Lau
2022-12-20 22:20 ` [PATCH bpf-next v5 12/17] net/mlx4_en: Introduce wrapper for xdp_buff Stanislav Fomichev
2022-12-20 22:20 ` [PATCH bpf-next v5 13/17] net/mlx4_en: Support RX XDP metadata Stanislav Fomichev
2022-12-20 22:20 ` [PATCH bpf-next v5 14/17] xsk: Add cb area to struct xdp_buff_xsk Stanislav Fomichev
2022-12-20 22:20 ` [PATCH bpf-next v5 15/17] net/mlx5e: Introduce wrapper for xdp_buff Stanislav Fomichev
2022-12-20 22:20 ` [PATCH bpf-next v5 16/17] net/mlx5e: Support RX XDP metadata Stanislav Fomichev
2022-12-20 22:20 ` [PATCH bpf-next v5 17/17] selftests/bpf: Simple program to dump XDP RX metadata Stanislav Fomichev
2022-12-23 0:53 ` Martin KaFai Lau
2022-12-23 4:07 ` Stanislav Fomichev
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