From: Matthieu Baerts <matttbe@kernel.org>
To: Geliang Tang <geliang@kernel.org>, mptcp@lists.linux.dev
Cc: Geliang Tang <tanggeliang@kylinos.cn>
Subject: Re: [PATCH mptcp-next v4 3/7] mptcp: add struct mptcp_pm_addr_id_bitmap
Date: Thu, 23 Jan 2025 12:40:42 +0100 [thread overview]
Message-ID: <5caed8de-3332-46fc-a38c-16f66dc9ad1d@kernel.org> (raw)
In-Reply-To: <30d07c758cfb06aeb312fe37238ce60fc120da13.1737012165.git.tanggeliang@kylinos.cn>
Hi Geliang,
On 16/01/2025 08:26, Geliang Tang wrote:
> From: Geliang Tang <tanggeliang@kylinos.cn>
>
> To simplify the use of bitmap in BPF, a new type for MPTCP userspace
> pm id bitmap, struct mptcp_pm_addr_id_bitmap is defined. Because
> there's no way to use DECLARE_BITMAP macro in BPF program, and it's
> not easy to reimplement it in BPF.
OK, I got that this is needed in BPF, but: why do you need it in the BPF PM?
I guess it is not for the dump_addr interface, right? If yes, then maybe
you don't need that, see my comment on the previous patch.
If not, what is it for?
I can understand that it might be needed to have a bitmap per msk to
handle the different address IDs. But then why is it needed to change
the code in pm_userspace.c, especially in mptcp_userspace_pm_dump_addr?
Cheers,
Matt
--
Sponsored by the NGI0 Core fund.
next prev parent reply other threads:[~2025-01-23 11:41 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-16 7:26 [PATCH mptcp-next v4 0/7] BPF path manager, part 3 Geliang Tang
2025-01-16 7:26 ` [PATCH mptcp-next v4 1/7] mptcp: add mptcp_pm_genl_fill_addr helper Geliang Tang
2025-01-23 11:37 ` Matthieu Baerts
2025-01-16 7:26 ` [PATCH mptcp-next v4 2/7] mptcp: add a build check for userspace_pm_dump_addr Geliang Tang
2025-01-23 11:37 ` Matthieu Baerts
2025-01-16 7:26 ` [PATCH mptcp-next v4 3/7] mptcp: add struct mptcp_pm_addr_id_bitmap Geliang Tang
2025-01-23 11:40 ` Matthieu Baerts [this message]
2025-01-16 7:26 ` [PATCH mptcp-next v4 4/7] mptcp: drop inet6_sk in mptcp_nl_find_ssk Geliang Tang
2025-01-23 11:40 ` Matthieu Baerts
2025-01-16 7:26 ` [PATCH mptcp-next v4 5/7] mptcp: drop match in userspace_pm_append_new_local_addr Geliang Tang
2025-01-23 11:41 ` Matthieu Baerts
2025-01-16 7:26 ` [PATCH mptcp-next v4 6/7] mptcp: hold msk lock before removing id 0 address Geliang Tang
2025-01-23 11:43 ` Matthieu Baerts
2025-01-16 7:26 ` [PATCH mptcp-next v4 7/7] mptcp: change is_backup interfaces as get_flags Geliang Tang
2025-01-23 11:45 ` Matthieu Baerts
2025-01-16 8:34 ` [PATCH mptcp-next v4 0/7] BPF path manager, part 3 MPTCP CI
2025-01-23 11:34 ` Matthieu Baerts
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