From: Martin KaFai Lau <martin.lau@linux.dev>
To: Yonghong Song <yhs@fb.com>
Cc: Alexei Starovoitov <ast@kernel.org>,
Andrii Nakryiko <andrii@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
kernel-team@fb.com, Martin KaFai Lau <martin.lau@kernel.org>,
bpf@vger.kernel.org
Subject: Re: [PATCH bpf-next v9 3/4] bpf: Add kfunc bpf_rcu_read_lock/unlock()
Date: Wed, 23 Nov 2022 15:32:05 -0800 [thread overview]
Message-ID: <7bcdf377-59e9-a774-2882-d53e494b37cd@linux.dev> (raw)
In-Reply-To: <20221123045406.2324479-1-yhs@fb.com>
On 11/22/22 8:54 PM, Yonghong Song wrote:
> @@ -7539,6 +7590,17 @@ static int check_helper_call(struct bpf_verifier_env *env, struct bpf_insn *insn
> return err;
> }
>
> + if (env->cur_state->active_rcu_lock) {
> + if (fn->might_sleep) {
> + verbose(env, "sleepable helper %s#%din rcu_read_lock region\n",
A nit. Missing a space before "in".
> + func_id_name(func_id), func_id);
> + return -EINVAL;
> + }
next prev parent reply other threads:[~2022-11-23 23:32 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-23 4:53 [PATCH bpf-next v9 0/4] bpf: Add bpf_rcu_read_lock() support Yonghong Song
2022-11-23 4:53 ` [PATCH bpf-next v9 1/4] compiler_types: Define __rcu as __attribute__((btf_type_tag("rcu"))) Yonghong Song
2022-11-23 4:54 ` [PATCH bpf-next v9 2/4] bpf: Introduce might_sleep field in bpf_func_proto Yonghong Song
2022-11-23 4:54 ` [PATCH bpf-next v9 3/4] bpf: Add kfunc bpf_rcu_read_lock/unlock() Yonghong Song
2022-11-23 23:32 ` Martin KaFai Lau [this message]
2022-11-24 1:40 ` Alexei Starovoitov
2022-11-24 2:57 ` Yonghong Song
2022-11-24 4:09 ` Alexei Starovoitov
2022-11-24 5:16 ` Yonghong Song
2022-11-23 4:54 ` [PATCH bpf-next v9 4/4] selftests/bpf: Add tests for bpf_rcu_read_lock() Yonghong Song
2022-11-23 23:30 ` [PATCH bpf-next v9 0/4] bpf: Add bpf_rcu_read_lock() support Martin KaFai Lau
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