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charset="utf-8" No need to change subflow->stale bit-filed now, so drop the writing access of it. Signed-off-by: Geliang Tang --- net/mptcp/bpf.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/net/mptcp/bpf.c b/net/mptcp/bpf.c index 51634efe4741..5c82cc35bfe0 100644 --- a/net/mptcp/bpf.c +++ b/net/mptcp/bpf.c @@ -52,9 +52,6 @@ static int bpf_mptcp_sched_btf_struct_access(struct bpf_v= erifier_log *log, case offsetof(struct mptcp_subflow_context, scheduled): end =3D offsetofend(struct mptcp_subflow_context, scheduled); break; - case offsetofend(struct mptcp_subflow_context, map_csum_len): - end =3D offsetof(struct mptcp_subflow_context, data_avail); - break; case offsetof(struct mptcp_subflow_context, avg_pacing_rate): end =3D offsetofend(struct mptcp_subflow_context, avg_pacing_rate); break; --=20 2.35.3 From nobody Fri May 17 05:26:32 2024 Received: from EUR03-DBA-obe.outbound.protection.outlook.com (mail-dbaeur03on2049.outbound.protection.outlook.com [40.107.104.49]) (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 30D5F110C for ; 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charset="utf-8" This patch implements the setting a subflow as stale/unstale in BPF MPTCP scheduler, named bpf_stale. The staled subflow will be added into a stale map in sk_storage. Two helper mptcp_subflow_set_stale() and mptcp_subflow_unstale() are added. The subflow will be set as stale in bpf_stale_data_init() and will be checked in bpf_stale_get_subflow(). Signed-off-by: Geliang Tang --- .../selftests/bpf/progs/mptcp_bpf_stale.c | 155 ++++++++++++++++++ 1 file changed, 155 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/mptcp_bpf_stale.c diff --git a/tools/testing/selftests/bpf/progs/mptcp_bpf_stale.c b/tools/te= sting/selftests/bpf/progs/mptcp_bpf_stale.c new file mode 100644 index 000000000000..44010ca83af3 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/mptcp_bpf_stale.c @@ -0,0 +1,155 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2023, SUSE. */ + +#include +#include "bpf_tcp_helpers.h" + +char _license[] SEC("license") =3D "GPL"; + +struct mptcp_stale_storage { + __u8 nr; + struct mptcp_subflow_context *stale[MPTCP_SUBFLOWS_MAX]; +}; + +struct { + __uint(type, BPF_MAP_TYPE_SK_STORAGE); + __uint(map_flags, BPF_F_NO_PREALLOC); + __type(key, int); + __type(value, struct mptcp_stale_storage); +} mptcp_stale_map SEC(".maps"); + +static void mptcp_subflow_set_stale(struct mptcp_stale_storage *storage, + struct mptcp_subflow_context *subflow) +{ + for (int i =3D 0; i < storage->nr && i < MPTCP_SUBFLOWS_MAX; i++) { + if (storage->stale[i] =3D=3D subflow) + return; + } + + if (storage->nr < MPTCP_SUBFLOWS_MAX - 1) + storage->stale[storage->nr++] =3D subflow; +} + +static void mptcp_subflow_unstale(struct mptcp_stale_storage *storage, + struct mptcp_subflow_context *subflow) +{ + for (int i =3D 0; i < storage->nr && i < MPTCP_SUBFLOWS_MAX; i++) { + if (storage->stale[i] =3D=3D subflow) { + for (int j =3D i; j < MPTCP_SUBFLOWS_MAX - 1; j++) { + if (!storage->stale[j + 1]) + break; + storage->stale[j] =3D storage->stale[j + 1]; + storage->stale[j + 1] =3D NULL; + } + storage->nr--; + return; + } + } +} + +static bool mptcp_subflow_is_stale(struct mptcp_stale_storage *storage, + struct mptcp_subflow_context *subflow) +{ + for (int i =3D 0; i < storage->nr && i < MPTCP_SUBFLOWS_MAX; i++) { + if (storage->stale[i] =3D=3D subflow) + return true; + } + + return false; +} + +static bool mptcp_subflow_is_active(struct mptcp_sched_data *data, + struct mptcp_subflow_context *stale) +{ + for (int i =3D 0; i < data->subflows && i < MPTCP_SUBFLOWS_MAX; i++) { + struct mptcp_subflow_context *subflow; + + subflow =3D mptcp_subflow_ctx_by_pos(data, i); + if (!subflow) + break; + if (subflow =3D=3D stale) + return true; + } + + return false; +} + +SEC("struct_ops/mptcp_sched_stale_init") +void BPF_PROG(mptcp_sched_stale_init, struct mptcp_sock *msk) +{ +} + +SEC("struct_ops/mptcp_sched_stale_release") +void BPF_PROG(mptcp_sched_stale_release, struct mptcp_sock *msk) +{ +} + +void BPF_STRUCT_OPS(bpf_stale_data_init, struct mptcp_sock *msk, + struct mptcp_sched_data *data) +{ + struct mptcp_subflow_context *subflow; + struct mptcp_stale_storage *storage; + + mptcp_sched_data_set_contexts(msk, data); + + storage =3D bpf_sk_storage_get(&mptcp_stale_map, msk, 0, + BPF_LOCAL_STORAGE_GET_F_CREATE); + if (!storage) + return; + + for (int i =3D 0; i < storage->nr && i < MPTCP_SUBFLOWS_MAX; i++) { + if (!mptcp_subflow_is_active(data, storage->stale[i])) + mptcp_subflow_unstale(storage, storage->stale[i]); + } + + subflow =3D mptcp_subflow_ctx_by_pos(data, 0); + if (subflow) { + mptcp_subflow_set_stale(storage, subflow); + mptcp_subflow_unstale(storage, subflow); + } + + subflow =3D mptcp_subflow_ctx_by_pos(data, 1); + if (subflow) { + mptcp_subflow_set_stale(storage, subflow); + mptcp_subflow_unstale(storage, subflow); + mptcp_subflow_set_stale(storage, subflow); + } +} + +int BPF_STRUCT_OPS(bpf_stale_get_subflow, struct mptcp_sock *msk, + const struct mptcp_sched_data *data) +{ + struct mptcp_stale_storage *storage; + int nr =3D -1; + + storage =3D bpf_sk_storage_get(&mptcp_stale_map, msk, 0, + BPF_LOCAL_STORAGE_GET_F_CREATE); + if (!storage) + return -1; + + for (int i =3D 0; i < data->subflows && i < MPTCP_SUBFLOWS_MAX; i++) { + struct mptcp_subflow_context *subflow; + + subflow =3D mptcp_subflow_ctx_by_pos(data, i); + if (!subflow) + break; + + if (mptcp_subflow_is_stale(storage, subflow)) + continue; + + nr =3D i; + } + + if (nr !=3D -1) + mptcp_subflow_set_scheduled(mptcp_subflow_ctx_by_pos(data, nr), true); + return 0; +} + +SEC(".struct_ops") +struct mptcp_sched_ops stale =3D { + .init =3D (void *)mptcp_sched_stale_init, + .release =3D (void *)mptcp_sched_stale_release, + .data_init =3D (void *)bpf_stale_data_init, + .get_subflow =3D (void *)bpf_stale_get_subflow, + .name =3D "bpf_stale", +}; --=20 2.35.3 From nobody Fri May 17 05:26:32 2024 Received: from EUR03-DBA-obe.outbound.protection.outlook.com (mail-dbaeur03on2068.outbound.protection.outlook.com [40.107.104.68]) (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 9365C110C for ; Wed, 2 Aug 2023 05:10:54 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=d1NPhdMw413lDxexI0JMalJZxXwM0mybpdSgqumjuvHBQQxlRBs43MrZxUU2g4ya4iAuxIQFpVxMCdEXClw5l83v5RXkM80tD1g5Ejp5SAoXR/K4PHp/lVRm6ktMybtqRBHRfNwDuwRHnGXsv9gfvehJ8We1jdD7k0TqwheI3XOhUtNAi9P6jk9xlOdcAjAG5jSz6I/RV13RJdiss0Bsm1UyP6s3gRWUUwqZ4SvZYilf0gyQB78sFuT7TfceFta2Gq3wPnX1vvfBJkRBZJ0HZlla6fNQ3R7aThyKsm5gsjgUCoAY4Ok8OFdNg0NkQ3vHTekNdbGvlNGsmd6qX71o8w== ARC-Message-Signature: i=1; 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charset="utf-8" This patch adds the bpf_stale scheduler test: test_stale(). Use sysctl to set net.mptcp.scheduler to use this sched. Add two veth net devices to simulate the multiple addresses case. Use 'ip mptcp endpoint' command to add the new endpoint ADDR_2 to PM netlink. Send data and check bytes_sent of 'ss' output after it to make sure the data has been only sent on ADDR_1 since ADDR_2 is set as stale. Signed-off-by: Geliang Tang --- .../testing/selftests/bpf/prog_tests/mptcp.c | 38 +++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing= /selftests/bpf/prog_tests/mptcp.c index 09770aa31f4a..5accc34d35e5 100644 --- a/tools/testing/selftests/bpf/prog_tests/mptcp.c +++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c @@ -12,6 +12,7 @@ #include "mptcp_bpf_rr.skel.h" #include "mptcp_bpf_red.skel.h" #include "mptcp_bpf_burst.skel.h" +#include "mptcp_bpf_stale.skel.h" =20 char NS_TEST[32]; =20 @@ -524,6 +525,41 @@ static void test_burst(void) mptcp_bpf_burst__destroy(burst_skel); } =20 +static void test_stale(void) +{ + struct mptcp_bpf_stale *stale_skel; + int server_fd, client_fd; + struct nstoken *nstoken; + struct bpf_link *link; + + stale_skel =3D mptcp_bpf_stale__open_and_load(); + if (!ASSERT_OK_PTR(stale_skel, "bpf_stale__open_and_load")) + return; + + link =3D bpf_map__attach_struct_ops(stale_skel->maps.stale); + if (!ASSERT_OK_PTR(link, "bpf_map__attach_struct_ops")) { + mptcp_bpf_stale__destroy(stale_skel); + return; + } + + nstoken =3D sched_init("subflow", "bpf_stale"); + if (!ASSERT_OK_PTR(nstoken, "sched_init:bpf_stale")) + goto fail; + server_fd =3D start_mptcp_server(AF_INET, ADDR_1, PORT_1, 0); + client_fd =3D connect_to_fd(server_fd, 0); + + send_data(server_fd, client_fd, "bpf_stale"); + ASSERT_OK(has_bytes_sent(ADDR_1), "has_bytes_sent addr_1"); + ASSERT_GT(has_bytes_sent(ADDR_2), 0, "has_bytes_sent addr_2"); + + close(client_fd); + close(server_fd); +fail: + cleanup_netns(nstoken); + bpf_link__destroy(link); + mptcp_bpf_stale__destroy(stale_skel); +} + void test_mptcp(void) { if (test__start_subtest("base")) @@ -540,4 +576,6 @@ void test_mptcp(void) test_red(); if (test__start_subtest("burst")) test_burst(); + if (test__start_subtest("stale")) + test_stale(); } --=20 2.35.3