netdev - Re: [PATCH bpf-next 2/5] net/smc: allow smc to negotiate protocols on policies

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Message-ID: <8e1694ec-9acf-a4bd-4dd2-28a258e1436b@gmail.com>
Date:   Wed, 26 Apr 2023 09:47:26 -0700
From:   Kui-Feng Lee <sinquersw@...il.com>
To:     "D. Wythe" <alibuda@...ux.alibaba.com>, kgraul@...ux.ibm.com,
        wenjia@...ux.ibm.com, jaka@...ux.ibm.com, ast@...nel.org,
        daniel@...earbox.net, andrii@...nel.org, martin.lau@...ux.dev,
        pabeni@...hat.com, song@...nel.org, sdf@...gle.com,
        haoluo@...gle.com, yhs@...com, edumazet@...gle.com,
        john.fastabend@...il.com, kpsingh@...nel.org, jolsa@...nel.org,
        guwen@...ux.alibaba.com
Cc:     kuba@...nel.org, davem@...emloft.net, netdev@...r.kernel.org,
        linux-s390@...r.kernel.org, linux-rdma@...r.kernel.org,
        bpf@...r.kernel.org
Subject: Re: [PATCH bpf-next 2/5] net/smc: allow smc to negotiate protocols on
 policies



On 4/26/23 02:24, D. Wythe wrote:
> From: "D. Wythe" <alibuda@...ux.alibaba.com>
> diff --git a/net/smc/bpf_smc.c b/net/smc/bpf_smc.c
> new file mode 100644
> index 0000000..0c0ec05
> --- /dev/null
> +++ b/net/smc/bpf_smc.c
> @@ -0,0 +1,201 @@
> +// SPDX-License-Identifier: GPL-2.0-only
... cut ...
> +
> +/* register ops */
> +int smc_sock_register_negotiator_ops(struct smc_sock_negotiator_ops *ops)
> +{
> +	int ret;
> +
> +	ret = smc_sock_validate_negotiator_ops(ops);
> +	if (ret)
> +		return ret;
> +
> +	/* calt key by name hash */
> +	ops->key = jhash(ops->name, sizeof(ops->name), strlen(ops->name));
> +
> +	spin_lock(&smc_sock_negotiator_list_lock);
> +	if (smc_negotiator_ops_get_by_key(ops->key)) {
> +		pr_notice("smc: %s negotiator already registered\n", ops->name);
> +		ret = -EEXIST;
> +	} else {
> +		list_add_tail_rcu(&ops->list, &smc_sock_negotiator_list);
> +	}
> +	spin_unlock(&smc_sock_negotiator_list_lock);
> +	return ret;
> +}
> +EXPORT_SYMBOL_GPL(smc_sock_register_negotiator_ops);

This and following functions are not specific to BPF, right?
I found you have more BPF specific code in this file in following
patches.  But, I feel these function should not in this file since
they are not BPF specific because file name "bpf_smc.c" hints.