From nobody Mon Feb 9 13:22:07 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AF46E1171D for ; Mon, 9 Sep 2024 01:37:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725845821; cv=none; b=NxKO4oGgPb5+GhnuHaC4mF0IOJpm4jqg7egvx0xyNI2YM9vFKD51bTwln/WPj6ZT3U1eD8rPJX/dlXQow28IQbFrlp9cyD1wtqH0hgfT71gnLmWpvxdEjvhW7UIbA/AEolBzNoP6stWnmQhaIusw/Lwt8tMqbKWyidxxl3JYrWU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725845821; c=relaxed/simple; bh=O7H5p81f3ccOd4bUeotTC/JgYHamD54yF+Aj4VgqtxI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CUH4aZv42/2D7jCCmftZwm9/aNL80KvViTFrpcMZhol+MUawKjQofIC0JN8Ioy+6vByfVUQ9DGwgTvH6aZaqoecNC0S1jwOiQaoeYP90w/AMyI4Fwudqmf7o1TpZi+99fc1i0BbnC8U4e6ObBkmdAPWijqhvYoPFBYPtnvvBVEI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gYZg1a2J; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="gYZg1a2J" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3DCB6C4CEC3; Mon, 9 Sep 2024 01:36:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1725845821; bh=O7H5p81f3ccOd4bUeotTC/JgYHamD54yF+Aj4VgqtxI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gYZg1a2JjcnYXOgJFFpEdcSdA1WLVb8U3U2FDtfVPTqeBDzoA/nqLuW7nwa3PsW+D EKj3rj4AAV1Pu16pKEqxSy65lJgHG4TSmYvpEsomKENNIG7C4PnVQwFio4Ke9IJfqF uMeSnIefc/FvRwxrD/G7CtIE22Woe1vf9zFMw7vS8/zMwq+pe9or8GwiwJtVzeQYsi o0akbuxP/Dcd2D33875q1diqcWFOCkEDnyXOkUsB8XT592eKqjGftjS4qEhLar5D10 LgSZLX14Q84+aDKDyq8sF6vAItmhUBIzqicGp70sBoLO3YhpAMrj+ej/g+GyoKXGB+ hFggYJ4orKIAw== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang Subject: [PATCH mptcp-next v2 3/4] selftests/bpf: Add mptcp_subflow bpf_iter test prog Date: Mon, 9 Sep 2024 09:36:46 +0800 Message-ID: X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Geliang Tang This patch adds a new mptcp bpf selftest program for the newly added mptcp_subflow bpf_iter. Export bpf_iter_mptcp_subflow_new/_next/_destroy into bpf_experimental.h then use bpf_for_each(mptcp_subflow, subflow, msk) to walk the mptcp subflow list. Add a ftrace hook for mptcp_sched_get_send() to do this test and invoke kfuncs mptcp_subflow_active() and mptcp_subflow_set_scheduled() in the loops. Signed-off-by: Geliang Tang --- .../testing/selftests/bpf/bpf_experimental.h | 7 ++++ tools/testing/selftests/bpf/progs/mptcp_bpf.h | 4 ++ .../selftests/bpf/progs/mptcp_bpf_iter.c | 38 +++++++++++++++++++ 3 files changed, 49 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/mptcp_bpf_iter.c diff --git a/tools/testing/selftests/bpf/bpf_experimental.h b/tools/testing= /selftests/bpf/bpf_experimental.h index 828556cdc2f0..97aad95c90c6 100644 --- a/tools/testing/selftests/bpf/bpf_experimental.h +++ b/tools/testing/selftests/bpf/bpf_experimental.h @@ -549,6 +549,13 @@ extern int bpf_iter_css_new(struct bpf_iter_css *it, extern struct cgroup_subsys_state *bpf_iter_css_next(struct bpf_iter_css *= it) __weak __ksym; extern void bpf_iter_css_destroy(struct bpf_iter_css *it) __weak __ksym; =20 +struct bpf_iter_mptcp_subflow; +extern int bpf_iter_mptcp_subflow_new(struct bpf_iter_mptcp_subflow *it, + struct mptcp_sock *msk) __weak __ksym; +extern struct mptcp_subflow_context * +bpf_iter_mptcp_subflow_next(struct bpf_iter_mptcp_subflow *it) __weak __ks= ym; +extern void bpf_iter_mptcp_subflow_destroy(struct bpf_iter_mptcp_subflow *= it) __weak __ksym; + extern int bpf_wq_init(struct bpf_wq *wq, void *p__map, unsigned int flags= ) __weak __ksym; extern int bpf_wq_start(struct bpf_wq *wq, unsigned int flags) __weak __ks= ym; extern int bpf_wq_set_callback_impl(struct bpf_wq *wq, diff --git a/tools/testing/selftests/bpf/progs/mptcp_bpf.h b/tools/testing/= selftests/bpf/progs/mptcp_bpf.h index 928a1e5ad8db..3280d4183beb 100644 --- a/tools/testing/selftests/bpf/progs/mptcp_bpf.h +++ b/tools/testing/selftests/bpf/progs/mptcp_bpf.h @@ -43,9 +43,13 @@ mptcp_subflow_tcp_sock(const struct mptcp_subflow_contex= t *subflow) } =20 /* ksym */ +extern bool mptcp_subflow_active(struct mptcp_subflow_context *subflow) __= ksym; extern void mptcp_subflow_set_scheduled(struct mptcp_subflow_context *subf= low, bool scheduled) __ksym; =20 +extern void bpf_rcu_read_lock(void) __ksym; +extern void bpf_rcu_read_unlock(void) __ksym; + extern struct mptcp_subflow_context * bpf_mptcp_subflow_ctx_by_pos(const struct mptcp_sched_data *data, unsigned= int pos) __ksym; =20 diff --git a/tools/testing/selftests/bpf/progs/mptcp_bpf_iter.c b/tools/tes= ting/selftests/bpf/progs/mptcp_bpf_iter.c new file mode 100644 index 000000000000..03168be3980b --- /dev/null +++ b/tools/testing/selftests/bpf/progs/mptcp_bpf_iter.c @@ -0,0 +1,38 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2024, Kylin Software */ + +/* vmlinux.h, bpf_helpers.h and other 'define' */ +#include "bpf_tracing_net.h" +#include "mptcp_bpf.h" + +char _license[] SEC("license") =3D "GPL"; +int iter =3D 0; +int pid; + +SEC("fentry/mptcp_sched_get_send") +int BPF_PROG(trace_mptcp_sched_get_send, struct mptcp_sock *msk) +{ + struct mptcp_subflow_context *subflow; + int i =3D 0; + + if (bpf_get_current_pid_tgid() >> 32 !=3D pid) + return 0; + + bpf_rcu_read_lock(); + bpf_for_each(mptcp_subflow, subflow, msk) { + if (i++ >=3D MPTCP_SUBFLOWS_MAX) + break; + + if (subflow->token !=3D msk->token) + break; + + if (!mptcp_subflow_active(subflow)) + continue; + + mptcp_subflow_set_scheduled(subflow, false); + } + bpf_rcu_read_unlock(); + + iter =3D i; + return 0; +} --=20 2.43.0