From nobody Thu Nov 21 21:52:50 2024 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 060BA18F2C4 for ; Wed, 9 Oct 2024 10:30:09 +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=1728469810; cv=none; b=fbORxjcPOzv0R4NsJvKiH+dNMP063AP82N79IpUNHUzEFAotL9JQJjqucT007Dl5++sjtPymIfD+fRzGINkOOgFdb0nyhg7iE7j7KQTRBxP388pgYPmpFWc9XZLSPHUMGNl+dF5px/jHfkNGef7D4Nr0f+/mtjAQim2KXHXrleo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728469810; c=relaxed/simple; bh=BuOgDD+bm6N14m3sIF4M6yO0GJOC3GY4OAJjbWNeIp0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=o1koOSvdP2kAC6lfemx5fz0RvcZkMbL5ToU02wYvzJwyl0lJiMWDSIRlvflTMy3e+Vk9z+SnTZPNgS6pXksOgyVvvxpygSB5VwA9JIAxwfKfpGEMUHG55yexnojPYYTFKl/zTBM1b2NmTzFwhyosst3upXbU/X+Ed03yqhsLtX4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Jc5YT/+z; 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="Jc5YT/+z" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 98703C4CECC; Wed, 9 Oct 2024 10:30:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728469809; bh=BuOgDD+bm6N14m3sIF4M6yO0GJOC3GY4OAJjbWNeIp0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Jc5YT/+zEVYMYe+kDmGUUltBSDWeP0Lxol1Ovsszm4ncfrJnCnJHLb0x+0wW8FovM n2V/8sgoLSYPvQNtWBZhGZ5tPO/xCIak/ne3Heksc29GdwaXq7QkVFninsPUoz4OK1 kqZUBW0jRKKZQH/30AjaWsTKu0FVKoop+p8EU59mToJPFCNVKqL2FY83AqIlu83LUX TPskJBOXRHuPuLlg6jtMwUTXc4hvx1zNlVYX5LH8YOczswO6QyKfANj4IgXnxTDjZe E5ApAievgATlOEahhrV9xMw3u3yq/SinSVuVMNWzbW1upBf5ADKsFkvofWtgI7ZL2T lmVZB2iqBC7tQ== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang Subject: [PATCH mptcp-next v3 07/10] Squash to "selftests/bpf: Add bpf_burst scheduler & test" Date: Wed, 9 Oct 2024 18:29:48 +0800 Message-ID: <7a0ddf3c8f4fb2ab49a5075fb61ea087986f16bb.1728469555.git.tanggeliang@kylinos.cn> 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 mptcp_subflow_active declaration. Signed-off-by: Geliang Tang --- .../selftests/bpf/progs/mptcp_bpf_burst.c | 78 +++++++++---------- 1 file changed, 39 insertions(+), 39 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 eb21119aa8f7..87b6d9dc876b 100644 --- a/tools/testing/selftests/bpf/progs/mptcp_bpf_burst.c +++ b/tools/testing/selftests/bpf/progs/mptcp_bpf_burst.c @@ -11,22 +11,21 @@ char _license[] SEC("license") =3D "GPL"; =20 #define min(a, b) ((a) < (b) ? (a) : (b)) =20 +#define SSK_MODE_ACTIVE 0 +#define SSK_MODE_BACKUP 1 +#define SSK_MODE_MAX 2 + struct bpf_subflow_send_info { __u8 subflow_id; __u64 linger_time; }; =20 -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_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 -#define SSK_MODE_ACTIVE 0 -#define SSK_MODE_BACKUP 1 -#define SSK_MODE_MAX 2 - static __always_inline __u64 div_u64(__u64 dividend, __u32 divisor) { return dividend / divisor; @@ -57,6 +56,19 @@ static __always_inline bool sk_stream_memory_free(const = struct sock *sk) return __sk_stream_memory_free(sk, 0); } =20 +static struct mptcp_subflow_context * +mptcp_lookup_subflow_by_id(struct mptcp_sock *msk, unsigned int id) +{ + struct mptcp_subflow_context *subflow; + + bpf_for_each(mptcp_subflow, subflow, msk) { + if (subflow->subflow_id =3D=3D id) + return subflow; + } + + return NULL; +} + SEC("struct_ops") void BPF_PROG(mptcp_sched_burst_init, struct mptcp_sock *msk) { @@ -67,8 +79,7 @@ void BPF_PROG(mptcp_sched_burst_release, struct mptcp_soc= k *msk) { } =20 -static int bpf_burst_get_send(struct mptcp_sock *msk, - struct mptcp_sched_data *data) +static int bpf_burst_get_send(struct mptcp_sock *msk) { struct bpf_subflow_send_info send_info[SSK_MODE_MAX]; struct mptcp_subflow_context *subflow; @@ -84,16 +95,10 @@ static int bpf_burst_get_send(struct mptcp_sock *msk, send_info[i].linger_time =3D -1; } =20 - for (i =3D 0; i < data->subflows && i < MPTCP_SUBFLOWS_MAX; i++) { - bool backup; + bpf_for_each(mptcp_subflow, subflow, msk) { + bool backup =3D subflow->backup || subflow->request_bkup; =20 - subflow =3D bpf_mptcp_subflow_ctx_by_pos(data, i); - if (!subflow) - break; - - backup =3D subflow->backup || subflow->request_bkup; - - ssk =3D mptcp_subflow_tcp_sock(subflow); + ssk =3D bpf_mptcp_subflow_tcp_sock(subflow); if (!mptcp_subflow_active(subflow)) continue; =20 @@ -109,7 +114,7 @@ static int 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].subflow_id =3D subflow->subflow_id; send_info[backup].linger_time =3D linger_time; } } @@ -119,10 +124,10 @@ static int bpf_burst_get_send(struct mptcp_sock *msk, if (!nr_active) send_info[SSK_MODE_ACTIVE].subflow_id =3D send_info[SSK_MODE_BACKUP].sub= flow_id; =20 - subflow =3D bpf_mptcp_subflow_ctx_by_pos(data, send_info[SSK_MODE_ACTIVE]= .subflow_id); + subflow =3D mptcp_lookup_subflow_by_id(msk, send_info[SSK_MODE_ACTIVE].su= bflow_id); if (!subflow) return -1; - ssk =3D mptcp_subflow_tcp_sock(subflow); + ssk =3D bpf_mptcp_subflow_tcp_sock(subflow); if (!ssk || !sk_stream_memory_free(ssk)) return -1; =20 @@ -141,23 +146,18 @@ static int bpf_burst_get_send(struct mptcp_sock *msk, return 0; } =20 -static int bpf_burst_get_retrans(struct mptcp_sock *msk, - struct mptcp_sched_data *data) +static int bpf_burst_get_retrans(struct mptcp_sock *msk) { - 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, msk) { + struct sock *ssk =3D bpf_mptcp_subflow_tcp_sock(subflow); =20 if (!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); @@ -166,23 +166,23 @@ static int bpf_burst_get_retrans(struct mptcp_sock *m= sk, } =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); @@ -194,8 +194,8 @@ int BPF_PROG(bpf_burst_get_subflow, struct mptcp_sock *= msk, struct mptcp_sched_data *data) { if (data->reinject) - return bpf_burst_get_retrans(msk, data); - return bpf_burst_get_send(msk, data); + return bpf_burst_get_retrans(msk); + return bpf_burst_get_send(msk); } =20 SEC(".struct_ops") --=20 2.43.0