From nobody Fri Mar 14 13:34:33 2025 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 3FE92339A8 for ; Sun, 9 Feb 2025 10:02:26 +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=1739095347; cv=none; b=JA+8ybpIpShySfcmIVY3S6fHl13Kg3DLjKNiG92co2TNChOmV1qSMljYMr4z/MifF40xS1UiMqKnMy+Gvg0PVT77hVSz9V7Hg0hhpX3AvsG7D9w74QxnmbFpOPvI0/q+9p5A+4xrLMqA9ntVG+YZDrkucjEaCdUtS9sQp66SqCc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739095347; c=relaxed/simple; bh=fb2uCNFpuQlFp40NpYrtMpKBUg+F6FlLBd93Ex0V49U=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AzkUszvKTRjSnNBOUzxIWMzNJ0c4ETJDdCLGajVcynuDUEuMrEWMAl5d/0nrl1xbnb18XS6cNFFneEAiwtHa8VpWCAoouk+Fp+4R+Qy2pker3+du8C0gzZL8sCDC/nfgQ4kDvzNKE/9CkZDbcqH4tu2f9n35CK5b6KqZxeuMMPg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=R/I7k7Lq; 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="R/I7k7Lq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B2DCAC4CEE2; Sun, 9 Feb 2025 10:02:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1739095346; bh=fb2uCNFpuQlFp40NpYrtMpKBUg+F6FlLBd93Ex0V49U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=R/I7k7LqUQoRG/EOMOQSAtU447W8o/24ftiFA0Fj2GuqxTtxVNdHJFcSW7udRymMm gG1EUfZergV4oqe4z4xT8tgli1Cw3TWrTY6Gmffa+YMi28/VBQSGKBfyk661NhmJJ/ gx9njDIntCeiuJTUJnX/GdX1D/+fU2NKe3IwN+fRqy6nCoZF7M0bI+HC9K7GOx11Qp IDcHxOL2q1jA49EJNRM8nh9NX9h22nQK9HJqdoaUjTa4wHD/dpuKOyVEfF3UZtQp1a d/zcLGqozSf7PnAwi81Fh0Tz9An9NfCMeWu/bNkuBOQOLinvdfxEX3kF7DTt0wVDQ/ o9RdJ/Mir+44w== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang Subject: [PATCH mptcp-next v14 7/8] Squash to "selftests/bpf: Add bpf_burst scheduler & test" Date: Sun, 9 Feb 2025 18:02:06 +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 Use the newly added bpf_for_each() helper to walk the conn_list. Drop bpf_subflow_send_info, use subflow_send_info instead. Signed-off-by: Geliang Tang --- .../selftests/bpf/progs/mptcp_bpf_burst.c | 78 +++++++------------ 1 file changed, 26 insertions(+), 52 deletions(-) diff --git a/tools/testing/selftests/bpf/progs/mptcp_bpf_burst.c b/tools/te= sting/selftests/bpf/progs/mptcp_bpf_burst.c index 5743601df9dc..482b30cfb011 100644 --- a/tools/testing/selftests/bpf/progs/mptcp_bpf_burst.c +++ b/tools/testing/selftests/bpf/progs/mptcp_bpf_burst.c @@ -11,15 +11,10 @@ char _license[] SEC("license") =3D "GPL"; =20 #define min(a, b) ((a) < (b) ? (a) : (b)) =20 -struct bpf_subflow_send_info { - __u8 subflow_id; - __u64 linger_time; -}; - extern bool mptcp_subflow_active(struct mptcp_subflow_context *subflow) __= ksym; extern void mptcp_set_timeout(struct sock *sk) __ksym; extern __u64 mptcp_wnd_end(const struct mptcp_sock *msk) __ksym; -extern bool tcp_stream_memory_free(const struct sock *sk, int wake) __ksym; +extern bool bpf_sk_stream_memory_free(const struct sock *sk) __ksym; extern bool bpf_mptcp_subflow_queues_empty(struct sock *sk) __ksym; extern void mptcp_pm_subflow_chk_stale(const struct mptcp_sock *msk, struc= t sock *ssk) __ksym; =20 @@ -44,19 +39,6 @@ static __always_inline bool tcp_rtx_and_write_queues_emp= ty(struct sock *sk) return bpf_mptcp_subflow_queues_empty(sk) && tcp_write_queue_empty(sk); } =20 -static __always_inline bool __sk_stream_memory_free(const struct sock *sk,= int wake) -{ - if (sk->sk_wmem_queued >=3D sk->sk_sndbuf) - return false; - - return tcp_stream_memory_free(sk, wake); -} - -static __always_inline bool sk_stream_memory_free(const struct sock *sk) -{ - return __sk_stream_memory_free(sk, 0); -} - SEC("struct_ops") void BPF_PROG(mptcp_sched_burst_init, struct mptcp_sock *msk) { @@ -71,7 +53,7 @@ SEC("struct_ops") int BPF_PROG(bpf_burst_get_send, struct mptcp_sock *msk, struct mptcp_sched_data *data) { - struct bpf_subflow_send_info send_info[SSK_MODE_MAX]; + struct subflow_send_info send_info[SSK_MODE_MAX]; struct mptcp_subflow_context *subflow; struct sock *sk =3D (struct sock *)msk; __u32 pace, burst, wmem; @@ -81,18 +63,12 @@ int BPF_PROG(bpf_burst_get_send, struct mptcp_sock *msk, =20 /* pick the subflow with the lower wmem/wspace ratio */ for (i =3D 0; i < SSK_MODE_MAX; ++i) { - send_info[i].subflow_id =3D MPTCP_SUBFLOWS_MAX; + send_info[i].ssk =3D NULL; send_info[i].linger_time =3D -1; } =20 - for (i =3D 0; i < data->subflows && i < MPTCP_SUBFLOWS_MAX; i++) { - bool backup; - - subflow =3D bpf_mptcp_subflow_ctx_by_pos(data, i); - if (!subflow) - break; - - backup =3D subflow->backup || subflow->request_bkup; + bpf_for_each(mptcp_subflow, subflow, sk) { + bool backup =3D subflow->backup || subflow->request_bkup; =20 ssk =3D mptcp_subflow_tcp_sock(subflow); if (!mptcp_subflow_active(subflow)) @@ -110,7 +86,7 @@ int BPF_PROG(bpf_burst_get_send, struct mptcp_sock *msk, =20 linger_time =3D div_u64((__u64)ssk->sk_wmem_queued << 32, pace); if (linger_time < send_info[backup].linger_time) { - send_info[backup].subflow_id =3D i; + send_info[backup].ssk =3D ssk; send_info[backup].linger_time =3D linger_time; } } @@ -118,16 +94,18 @@ int BPF_PROG(bpf_burst_get_send, struct mptcp_sock *ms= k, =20 /* pick the best backup if no other subflow is active */ if (!nr_active) - send_info[SSK_MODE_ACTIVE].subflow_id =3D send_info[SSK_MODE_BACKUP].sub= flow_id; + send_info[SSK_MODE_ACTIVE].ssk =3D send_info[SSK_MODE_BACKUP].ssk; =20 - subflow =3D bpf_mptcp_subflow_ctx_by_pos(data, send_info[SSK_MODE_ACTIVE]= .subflow_id); - if (!subflow) + ssk =3D send_info[SSK_MODE_ACTIVE].ssk; + if (!ssk || !bpf_sk_stream_memory_free(ssk)) return -1; - ssk =3D mptcp_subflow_tcp_sock(subflow); - if (!ssk || !sk_stream_memory_free(ssk)) + + subflow =3D bpf_mptcp_subflow_ctx(ssk); + if (!subflow) return -1; =20 burst =3D min(MPTCP_SEND_BURST_SIZE, mptcp_wnd_end(msk) - msk->snd_nxt); + ssk =3D bpf_core_cast(ssk, struct sock); wmem =3D ssk->sk_wmem_queued; if (!burst) goto out; @@ -146,20 +124,16 @@ SEC("struct_ops") int BPF_PROG(bpf_burst_get_retrans, struct mptcp_sock *msk, struct mptcp_sched_data *data) { - int backup =3D MPTCP_SUBFLOWS_MAX, pick =3D MPTCP_SUBFLOWS_MAX, subflow_i= d; + struct sock *backup =3D NULL, *pick =3D NULL; struct mptcp_subflow_context *subflow; int min_stale_count =3D INT_MAX; - struct sock *ssk; =20 - for (int i =3D 0; i < data->subflows && i < MPTCP_SUBFLOWS_MAX; i++) { - subflow =3D bpf_mptcp_subflow_ctx_by_pos(data, i); - if (!subflow) - break; + bpf_for_each(mptcp_subflow, subflow, (struct sock *)msk) { + struct sock *ssk =3D bpf_mptcp_subflow_tcp_sock(subflow); =20 - if (!mptcp_subflow_active(subflow)) + if (!ssk || !mptcp_subflow_active(subflow)) continue; =20 - ssk =3D mptcp_subflow_tcp_sock(subflow); /* still data outstanding at TCP level? skip this */ if (!tcp_rtx_and_write_queues_empty(ssk)) { mptcp_pm_subflow_chk_stale(msk, ssk); @@ -168,23 +142,23 @@ int BPF_PROG(bpf_burst_get_retrans, struct mptcp_sock= *msk, } =20 if (subflow->backup || subflow->request_bkup) { - if (backup =3D=3D MPTCP_SUBFLOWS_MAX) - backup =3D i; + if (!backup) + backup =3D ssk; continue; } =20 - if (pick =3D=3D MPTCP_SUBFLOWS_MAX) - pick =3D i; + if (!pick) + pick =3D ssk; } =20 - if (pick < MPTCP_SUBFLOWS_MAX) { - subflow_id =3D pick; + if (pick) goto out; - } - subflow_id =3D min_stale_count > 1 ? backup : MPTCP_SUBFLOWS_MAX; + pick =3D min_stale_count > 1 ? backup : NULL; =20 out: - subflow =3D bpf_mptcp_subflow_ctx_by_pos(data, subflow_id); + if (!pick) + return -1; + subflow =3D bpf_mptcp_subflow_ctx(pick); if (!subflow) return -1; mptcp_subflow_set_scheduled(subflow, true); --=20 2.43.0