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Signed-off-by: Geliang Tang --- include/net/mptcp.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/net/mptcp.h b/include/net/mptcp.h index 828b10ddabee..4bba29c99172 100644 --- a/include/net/mptcp.h +++ b/include/net/mptcp.h @@ -100,7 +100,7 @@ struct mptcp_out_options { #define MPTCP_SUBFLOWS_MAX 8 =20 struct mptcp_sched_data { - bool reinject; + bool reinject; struct mptcp_subflow_context *contexts[MPTCP_SUBFLOWS_MAX]; }; =20 --=20 2.35.3 From nobody Mon Apr 29 05:34:18 2024 Received: from EUR03-AM7-obe.outbound.protection.outlook.com (mail-am7eur03on2054.outbound.protection.outlook.com [40.107.105.54]) (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 C654E7C for ; Mon, 29 May 2023 09:17:48 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=eompfiDEFttEscvZKLaqy5JhNdT3gkEk9jtliBk6YD5P44709RI5MLHGyW3BcxWt/s2OD4Qr7OAnNsw/CuTdmsrvQGe/nWLf5PPgtv82jc/HBq3aWplAfUHbbIU3rVXiL1jWujRC2o6qsahahK0yYMwgqxPCQYrMzrkgna2iQNxXAM1eY7QikH3D6MivfK2A94Ywyr6p0cxFw1LLR0ntN2ld8rgGaaT5I6K/Sxzq10w4v2M1xkLHXYCy7FfG92Rd5hD8v9xCC2Ik6dtCvRPTQCeW3Yyxxuc3UY7BZOzNbQmGMlChF/rTn8Xh1I1JjyH3eGIVoiBFHS9k88JYmzyI7A== ARC-Message-Signature: i=1; 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charset="utf-8" Add sched_data pointer into mptcp_sock too. Signed-off-by: Geliang Tang --- net/mptcp/protocol.h | 1 + net/mptcp/sched.c | 8 ++++++++ 2 files changed, 9 insertions(+) diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index bd3771c7d79d..09a5e23adca1 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -311,6 +311,7 @@ struct mptcp_sock { */ struct sock *first; struct mptcp_pm_data pm; + struct mptcp_sched_data *data; struct mptcp_sched_ops *sched; struct { u32 space; /* bytes copied in last measurement window */ diff --git a/net/mptcp/sched.c b/net/mptcp/sched.c index c7c167e48d72..edd7c92f4ffe 100644 --- a/net/mptcp/sched.c +++ b/net/mptcp/sched.c @@ -64,6 +64,10 @@ int mptcp_init_sched(struct mptcp_sock *msk, if (!bpf_try_module_get(sched, sched->owner)) return -EBUSY; =20 + msk->data =3D kzalloc(sizeof(struct mptcp_sched_data), GFP_ATOMIC); + if (!msk->data) + return -ENOMEM; + msk->sched =3D sched; if (msk->sched->init) msk->sched->init(msk); @@ -81,6 +85,10 @@ void mptcp_release_sched(struct mptcp_sock *msk) if (!sched) return; 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charset="utf-8" Use msk->data instead of the local variable data. Signed-off-by: Geliang Tang --- net/mptcp/sched.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/net/mptcp/sched.c b/net/mptcp/sched.c index edd7c92f4ffe..af5996a1d3e8 100644 --- a/net/mptcp/sched.c +++ b/net/mptcp/sched.c @@ -124,7 +124,6 @@ void mptcp_sched_data_set_contexts(const struct mptcp_s= ock *msk, int mptcp_sched_get_send(struct mptcp_sock *msk) { struct mptcp_subflow_context *subflow; - struct mptcp_sched_data data; =20 msk_owned_by_me(msk); =20 @@ -154,15 +153,14 @@ int mptcp_sched_get_send(struct mptcp_sock *msk) return 0; } =20 - data.reinject =3D false; - msk->sched->data_init(msk, &data); - return msk->sched->get_subflow(msk, &data); + msk->data->reinject =3D false; + msk->sched->data_init(msk, msk->data); + return msk->sched->get_subflow(msk, msk->data); } =20 int mptcp_sched_get_retrans(struct mptcp_sock *msk) { struct mptcp_subflow_context *subflow; - struct mptcp_sched_data data; =20 msk_owned_by_me(msk); =20 @@ -185,7 +183,7 @@ int mptcp_sched_get_retrans(struct mptcp_sock *msk) return 0; 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charset="utf-8" This patch moves last_snd from struct mptcp_sock to struct mptcp_sched_data. Signed-off-by: Geliang Tang --- include/net/mptcp.h | 1 + net/mptcp/protocol.c | 14 +++++++------- net/mptcp/protocol.h | 1 - 3 files changed, 8 insertions(+), 8 deletions(-) diff --git a/include/net/mptcp.h b/include/net/mptcp.h index 4bba29c99172..d52aeb8b4485 100644 --- a/include/net/mptcp.h +++ b/include/net/mptcp.h @@ -100,6 +100,7 @@ struct mptcp_out_options { #define MPTCP_SUBFLOWS_MAX 8 =20 struct mptcp_sched_data { + struct sock *last_snd; bool reinject; struct mptcp_subflow_context *contexts[MPTCP_SUBFLOWS_MAX]; }; diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 763f709fd5f5..356f8ba1e80d 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -1619,7 +1619,7 @@ void __mptcp_push_pending(struct sock *sk, unsigned i= nt flags) continue; } do_check_data_fin =3D true; - msk->last_snd =3D ssk; + msk->data->last_snd =3D ssk; } } } @@ -1660,7 +1660,7 @@ static void __mptcp_subflow_push_pending(struct sock = *sk, struct sock *ssk, bool if (ret <=3D 0) break; copied +=3D ret; - msk->last_snd =3D ssk; + msk->data->last_snd =3D ssk; continue; } =20 @@ -1673,7 +1673,7 @@ static void __mptcp_subflow_push_pending(struct sock = *sk, struct sock *ssk, bool if (ret <=3D 0) keep_pushing =3D false; copied +=3D ret; - msk->last_snd =3D ssk; + msk->data->last_snd =3D ssk; } =20 mptcp_for_each_subflow(msk, subflow) { @@ -2457,8 +2457,8 @@ static void __mptcp_close_ssk(struct sock *sk, struct= sock *ssk, WRITE_ONCE(msk->first, NULL); =20 out: - if (ssk =3D=3D msk->last_snd) - msk->last_snd =3D NULL; + if (msk->data && ssk =3D=3D msk->data->last_snd) + msk->data->last_snd =3D NULL; =20 if (need_push) __mptcp_push_pending(sk, 0); @@ -2640,7 +2640,7 @@ static void __mptcp_retrans(struct sock *sk) =20 release_sock(ssk); =20 - msk->last_snd =3D ssk; + msk->data->last_snd =3D ssk; } } dfrag->already_sent =3D max(dfrag->already_sent, len); @@ -3142,7 +3142,7 @@ static int mptcp_disconnect(struct sock *sk, int flag= s) * subflow */ mptcp_destroy_common(msk, MPTCP_CF_FASTCLOSE); 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charset="utf-8" This patch moves snd_burst from struct mptcp_sock to struct mptcp_sched_data. Signed-off-by: Geliang Tang --- include/net/mptcp.h | 1 + net/mptcp/protocol.c | 11 ++++++----- net/mptcp/protocol.h | 4 ++-- net/mptcp/sched.c | 2 +- 4 files changed, 10 insertions(+), 8 deletions(-) diff --git a/include/net/mptcp.h b/include/net/mptcp.h index d52aeb8b4485..fb4e6a59afc8 100644 --- a/include/net/mptcp.h +++ b/include/net/mptcp.h @@ -101,6 +101,7 @@ struct mptcp_out_options { =20 struct mptcp_sched_data { struct sock *last_snd; + int snd_burst; bool reinject; struct mptcp_subflow_context *contexts[MPTCP_SUBFLOWS_MAX]; }; diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 356f8ba1e80d..c523e394307c 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -1416,7 +1416,8 @@ bool mptcp_subflow_active(struct mptcp_subflow_contex= t *subflow) * returns the subflow that will transmit the next DSS * additionally updates the rtx timeout */ -struct sock *mptcp_subflow_get_send(struct mptcp_sock *msk) +struct sock *mptcp_subflow_get_send(const struct mptcp_sock *msk, + struct mptcp_sched_data *data) { struct subflow_send_info send_info[SSK_MODE_MAX]; struct mptcp_subflow_context *subflow; @@ -1486,7 +1487,7 @@ struct sock *mptcp_subflow_get_send(struct mptcp_sock= *msk) subflow->avg_pacing_rate =3D div_u64((u64)subflow->avg_pacing_rate * wmem= + READ_ONCE(ssk->sk_pacing_rate) * burst, burst + wmem); - msk->snd_burst =3D burst; + data->snd_burst =3D burst; return ssk; } =20 @@ -1504,7 +1505,7 @@ static void mptcp_update_post_push(struct mptcp_sock = *msk, =20 dfrag->already_sent +=3D sent; =20 - msk->snd_burst -=3D sent; + msk->data->snd_burst -=3D sent; =20 snd_nxt_new +=3D dfrag->already_sent; =20 @@ -1555,7 +1556,7 @@ static int __subflow_push_pending(struct sock *sk, st= ruct sock *ssk, } WRITE_ONCE(msk->first_pending, mptcp_send_next(sk)); =20 - if (msk->snd_burst <=3D 0 || + if (msk->data->snd_burst <=3D 0 || !sk_stream_memory_free(ssk) || !mptcp_subflow_active(mptcp_subflow_ctx(ssk))) { err =3D copied; @@ -2349,7 +2350,7 @@ bool __mptcp_retransmit_pending_data(struct sock *sk) mptcp_data_unlock(sk); =20 msk->first_pending =3D rtx_head; - msk->snd_burst =3D 0; + msk->data->snd_burst =3D 0; =20 /* be sure to clear the "sent status" on all re-injected fragments */ list_for_each_entry(cur, &msk->rtx_queue, list) { diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index 21d59b0875e7..760fdd888e31 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -266,7 +266,6 @@ struct mptcp_sock { atomic64_t rcv_wnd_sent; u64 rcv_data_fin_seq; int rmem_fwd_alloc; - int snd_burst; int old_wspace; u64 recovery_snd_nxt; /* in recovery mode accept up to this seq; * recovery related fields are under data_lock @@ -659,7 +658,8 @@ void mptcp_subflow_set_scheduled(struct mptcp_subflow_c= ontext *subflow, bool scheduled); void mptcp_sched_data_set_contexts(const struct mptcp_sock *msk, struct mptcp_sched_data *data); -struct sock *mptcp_subflow_get_send(struct mptcp_sock *msk); +struct sock *mptcp_subflow_get_send(const struct mptcp_sock *msk, + struct mptcp_sched_data *data); struct sock *mptcp_subflow_get_retrans(struct mptcp_sock *msk); 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charset="utf-8" This patch defines the default packet scheduler mptcp_sched_default. Register it in mptcp_sched_init(), which is invoked in mptcp_proto_init(). Skip deleting this default scheduler in mptcp_unregister_scheduler(). Set msk->sched to the default scheduler when the input parameter of mptcp_init_sched() is NULL. Signed-off-by: Geliang Tang --- net/mptcp/protocol.c | 3 ++- net/mptcp/protocol.h | 3 ++- net/mptcp/sched.c | 38 ++++++++++++++++++++++++++++++++++++-- 3 files changed, 40 insertions(+), 4 deletions(-) diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index c523e394307c..27e86a2cc16c 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -2278,7 +2278,7 @@ static void mptcp_timeout_timer(struct timer_list *t) * * A backup subflow is returned only if that is the only kind available. */ -struct sock *mptcp_subflow_get_retrans(struct mptcp_sock *msk) +struct sock *mptcp_subflow_get_retrans(const struct mptcp_sock *msk) { struct sock *backup =3D NULL, *pick =3D NULL; struct mptcp_subflow_context *subflow; @@ -4005,6 +4005,7 @@ void __init mptcp_proto_init(void) =20 mptcp_subflow_init(); mptcp_pm_init(); + mptcp_sched_init(); mptcp_token_init(); =20 if (proto_register(&mptcp_prot, 1) !=3D 0) diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index 760fdd888e31..9552d5f581f6 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -651,6 +651,7 @@ void mptcp_info2sockaddr(const struct mptcp_addr_info *= info, struct mptcp_sched_ops *mptcp_sched_find(const char *name); int mptcp_register_scheduler(struct mptcp_sched_ops *sched); void mptcp_unregister_scheduler(struct mptcp_sched_ops *sched); +void mptcp_sched_init(void); int mptcp_init_sched(struct mptcp_sock *msk, struct mptcp_sched_ops *sched); void mptcp_release_sched(struct mptcp_sock *msk); @@ -660,7 +661,7 @@ void mptcp_sched_data_set_contexts(const struct mptcp_s= ock *msk, struct mptcp_sched_data *data); struct sock *mptcp_subflow_get_send(const struct mptcp_sock *msk, struct mptcp_sched_data *data); -struct sock *mptcp_subflow_get_retrans(struct mptcp_sock *msk); +struct sock *mptcp_subflow_get_retrans(const struct mptcp_sock *msk); int mptcp_sched_get_send(struct mptcp_sock *msk); int mptcp_sched_get_retrans(struct mptcp_sock *msk); =20 diff --git a/net/mptcp/sched.c b/net/mptcp/sched.c index 81cf278b0435..3a7dcde726db 100644 --- a/net/mptcp/sched.c +++ b/net/mptcp/sched.c @@ -16,6 +16,33 @@ static DEFINE_SPINLOCK(mptcp_sched_list_lock); static LIST_HEAD(mptcp_sched_list); =20 +static void mptcp_sched_default_data_init(const struct mptcp_sock *msk, + struct mptcp_sched_data *data) +{ + data->snd_burst =3D 0; +} + +static int mptcp_sched_default_get_subflow(const struct mptcp_sock *msk, + struct mptcp_sched_data *data) +{ + struct sock *ssk; + + ssk =3D data->reinject ? mptcp_subflow_get_retrans(msk) : + mptcp_subflow_get_send(msk, data); + if (!ssk) + return -EINVAL; + + mptcp_subflow_set_scheduled(mptcp_subflow_ctx(ssk), true); + return 0; +} + +static struct mptcp_sched_ops mptcp_sched_default =3D { + .data_init =3D mptcp_sched_default_data_init, + .get_subflow =3D mptcp_sched_default_get_subflow, + .name =3D "default", + .owner =3D THIS_MODULE, +}; + /* Must be called with rcu read lock held */ struct mptcp_sched_ops *mptcp_sched_find(const char *name) { @@ -50,16 +77,24 @@ int mptcp_register_scheduler(struct mptcp_sched_ops *sc= hed) =20 void mptcp_unregister_scheduler(struct mptcp_sched_ops *sched) { + if (sched =3D=3D &mptcp_sched_default) + return; + spin_lock(&mptcp_sched_list_lock); list_del_rcu(&sched->list); spin_unlock(&mptcp_sched_list_lock); } =20 +void mptcp_sched_init(void) +{ + mptcp_register_scheduler(&mptcp_sched_default); 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charset="utf-8" Add more struct accesses. Signed-off-by: Geliang Tang --- net/mptcp/bpf.c | 33 ++++++++++++++++++++++++--------- 1 file changed, 24 insertions(+), 9 deletions(-) diff --git a/net/mptcp/bpf.c b/net/mptcp/bpf.c index dd1208670c54..f2ce9acc2628 100644 --- a/net/mptcp/bpf.c +++ b/net/mptcp/bpf.c @@ -18,8 +18,9 @@ #ifdef CONFIG_BPF_JIT extern struct bpf_struct_ops bpf_mptcp_sched_ops; extern struct btf *btf_vmlinux; -static const struct btf_type *mptcp_sched_type __read_mostly; -static u32 mptcp_sched_id; +static const struct btf_type *mptcp_context_type __read_mostly; +static const struct btf_type *mptcp_data_type __read_mostly; +static u32 mptcp_context_id, mptcp_data_id; =20 static u32 optional_sched_ops[] =3D { offsetof(struct mptcp_sched_ops, init), @@ -41,8 +42,8 @@ static int bpf_mptcp_sched_btf_struct_access(struct bpf_v= erifier_log *log, size_t end; =20 t =3D btf_type_by_id(reg->btf, reg->btf_id); - if (t !=3D mptcp_sched_type) { - bpf_log(log, "only access to mptcp_subflow_context is supported\n"); + if (t !=3D mptcp_context_type && t !=3D mptcp_data_type) { + bpf_log(log, "only access to subflow_context or sched_data is supported\= n"); return -EACCES; } =20 @@ -50,14 +51,21 @@ static int bpf_mptcp_sched_btf_struct_access(struct bpf= _verifier_log *log, case offsetof(struct mptcp_subflow_context, scheduled): end =3D offsetofend(struct mptcp_subflow_context, scheduled); break; + case offsetof(struct mptcp_subflow_context, avg_pacing_rate): + end =3D offsetofend(struct mptcp_subflow_context, avg_pacing_rate); + break; + case offsetof(struct mptcp_sched_data, snd_burst): + end =3D offsetofend(struct mptcp_sched_data, snd_burst); + break; default: - bpf_log(log, "no write support to mptcp_subflow_context at off %d\n", of= f); + bpf_log(log, "no write support to %s at off %d\n", + t =3D=3D mptcp_context_type ? "subflow_context" : "sched_data", off); return -EACCES; } =20 if (off + size > end) { - bpf_log(log, "access beyond mptcp_subflow_context at off %u size %u ende= d at %zu", - off, size, end); + bpf_log(log, "access beyond %s at off %u size %u ended at %zu", + t =3D=3D mptcp_context_type ? 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charset="utf-8" Added into more functions. Signed-off-by: Geliang Tang --- net/mptcp/bpf.c | 9 +++++++++ net/mptcp/protocol.c | 40 ++++++++++++++++++++++++++++++++++++---- 2 files changed, 45 insertions(+), 4 deletions(-) diff --git a/net/mptcp/bpf.c b/net/mptcp/bpf.c index f2ce9acc2628..c5acce1409f5 100644 --- a/net/mptcp/bpf.c +++ b/net/mptcp/bpf.c @@ -175,6 +175,15 @@ struct bpf_struct_ops bpf_mptcp_sched_ops =3D { BTF_SET8_START(bpf_mptcp_sched_kfunc_ids) BTF_ID_FLAGS(func, mptcp_subflow_set_scheduled) BTF_ID_FLAGS(func, mptcp_sched_data_set_contexts) +BTF_ID_FLAGS(func, mptcp_subflow_active) +BTF_ID_FLAGS(func, mptcp_timeout_from_subflow) +BTF_ID_FLAGS(func, mptcp_set_timer) +BTF_ID_FLAGS(func, mptcp_stream_memory_free) +BTF_ID_FLAGS(func, mptcp_get_linger_time) +BTF_ID_FLAGS(func, mptcp_get_burst) +BTF_ID_FLAGS(func, mptcp_get_pacing_rate) +BTF_ID_FLAGS(func, mptcp_rtx_and_write_queues_empty) +BTF_ID_FLAGS(func, mptcp_pm_subflow_chk_stale) BTF_SET8_END(bpf_mptcp_sched_kfunc_ids) =20 static const struct btf_kfunc_id_set bpf_mptcp_sched_kfunc_set =3D { diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 27e86a2cc16c..fb9668c7f4bf 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -483,12 +483,12 @@ static void mptcp_set_datafin_timeout(struct sock *sk) mptcp_sk(sk)->timer_ival =3D TCP_RTO_MIN << retransmits; } =20 -static void __mptcp_set_timeout(struct sock *sk, long tout) +void mptcp_set_timer(struct sock *sk, long tout) { mptcp_sk(sk)->timer_ival =3D tout > 0 ? tout : TCP_RTO_MIN; } =20 -static long mptcp_timeout_from_subflow(const struct mptcp_subflow_context = *subflow) +long mptcp_timeout_from_subflow(const struct mptcp_subflow_context *subflo= w) { const struct sock *ssk =3D mptcp_subflow_tcp_sock(subflow); =20 @@ -503,7 +503,7 @@ static void mptcp_set_timeout(struct sock *sk) =20 mptcp_for_each_subflow(mptcp_sk(sk), subflow) tout =3D max(tout, mptcp_timeout_from_subflow(subflow)); - __mptcp_set_timeout(sk, tout); + mptcp_set_timer(sk, tout); } =20 static inline bool tcp_can_send_ack(const struct sock *ssk) @@ -1408,6 +1408,33 @@ bool mptcp_subflow_active(struct mptcp_subflow_conte= xt *subflow) return __mptcp_subflow_active(subflow); } =20 +bool mptcp_stream_memory_free(struct mptcp_subflow_context *subflow) +{ + const struct sock *ssk =3D mptcp_subflow_tcp_sock(subflow); + + return sk_stream_memory_free(ssk); +} + +u64 mptcp_get_linger_time(struct sock *ssk, u32 pace) +{ + return div_u64((u64)READ_ONCE(ssk->sk_wmem_queued) << 32, pace); +} + +u32 mptcp_get_burst(const struct mptcp_sock *msk) +{ + return min_t(int, MPTCP_SEND_BURST_SIZE, mptcp_wnd_end(msk) - msk->snd_nx= t); +} + +unsigned long mptcp_get_pacing_rate(struct mptcp_subflow_context *subflow,= u32 burst) +{ + struct sock *ssk =3D mptcp_subflow_tcp_sock(subflow); + u32 wmem =3D READ_ONCE(ssk->sk_wmem_queued); + + return div_u64((u64)subflow->avg_pacing_rate * wmem + + READ_ONCE(ssk->sk_pacing_rate) * burst, + burst + wmem); +} + #define SSK_MODE_ACTIVE 0 #define SSK_MODE_BACKUP 1 #define SSK_MODE_MAX 2 @@ -1457,7 +1484,7 @@ struct sock *mptcp_subflow_get_send(const struct mptc= p_sock *msk, send_info[subflow->backup].linger_time =3D linger_time; } } - __mptcp_set_timeout(sk, tout); + mptcp_set_timer(sk, tout); =20 /* pick the best backup if no other subflow is active */ if (!nr_active) @@ -2273,6 +2300,11 @@ static void mptcp_timeout_timer(struct timer_list *t) sock_put(sk); } =20 +bool mptcp_rtx_and_write_queues_empty(const struct sock *sk) +{ + return tcp_rtx_and_write_queues_empty(sk); +} + /* Find an idle subflow. 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Signed-off-by: Geliang Tang --- tools/testing/selftests/bpf/bpf_tcp_helpers.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/bpf_tcp_helpers.h b/tools/testing/= selftests/bpf/bpf_tcp_helpers.h index 72c618037386..fcb023a749ad 100644 --- a/tools/testing/selftests/bpf/bpf_tcp_helpers.h +++ b/tools/testing/selftests/bpf/bpf_tcp_helpers.h @@ -239,7 +239,7 @@ struct mptcp_subflow_context { } __attribute__((preserve_access_index)); =20 struct mptcp_sched_data { - bool reinject; + bool reinject; struct mptcp_subflow_context *contexts[MPTCP_SUBFLOWS_MAX]; } __attribute__((preserve_access_index)); =20 --=20 2.35.3 From nobody Mon Apr 29 05:34:18 2024 Received: from EUR01-VE1-obe.outbound.protection.outlook.com (mail-ve1eur01on2078.outbound.protection.outlook.com [40.107.14.78]) (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 9463D7C for ; Mon, 29 May 2023 09:18:55 +0000 (UTC) ARC-Seal: i=1; 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charset="utf-8" Use data->last_snd instead of msk->last_snd. Signed-off-by: Geliang Tang --- tools/testing/selftests/bpf/bpf_tcp_helpers.h | 2 +- tools/testing/selftests/bpf/progs/mptcp_bpf_rr.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/bpf/bpf_tcp_helpers.h b/tools/testing/= selftests/bpf/bpf_tcp_helpers.h index fcb023a749ad..dddb51a47740 100644 --- a/tools/testing/selftests/bpf/bpf_tcp_helpers.h +++ b/tools/testing/selftests/bpf/bpf_tcp_helpers.h @@ -239,6 +239,7 @@ struct mptcp_subflow_context { } __attribute__((preserve_access_index)); =20 struct mptcp_sched_data { + struct sock *last_snd; bool reinject; struct mptcp_subflow_context *contexts[MPTCP_SUBFLOWS_MAX]; } __attribute__((preserve_access_index)); @@ -259,7 +260,6 @@ struct mptcp_sched_ops { struct mptcp_sock { struct inet_connection_sock sk; =20 - struct sock *last_snd; __u32 token; struct sock *first; char ca_name[TCP_CA_NAME_MAX]; diff --git a/tools/testing/selftests/bpf/progs/mptcp_bpf_rr.c b/tools/testi= ng/selftests/bpf/progs/mptcp_bpf_rr.c index e101428e5906..4b4141056fe2 100644 --- a/tools/testing/selftests/bpf/progs/mptcp_bpf_rr.c +++ b/tools/testing/selftests/bpf/progs/mptcp_bpf_rr.c @@ -28,10 +28,10 @@ int BPF_STRUCT_OPS(bpf_rr_get_subflow, const struct mpt= cp_sock *msk, int nr =3D 0; 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charset="utf-8" This patch implements the burst BPF MPTCP scheduler, named bpf_burst, which is the default scheduler in protocol.c. Signed-off-by: Geliang Tang --- tools/testing/selftests/bpf/bpf_tcp_helpers.h | 3 + .../selftests/bpf/progs/mptcp_bpf_burst.c | 195 ++++++++++++++++++ 2 files changed, 198 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/mptcp_bpf_burst.c diff --git a/tools/testing/selftests/bpf/bpf_tcp_helpers.h b/tools/testing/= selftests/bpf/bpf_tcp_helpers.h index dddb51a47740..d42a0c00ed73 100644 --- a/tools/testing/selftests/bpf/bpf_tcp_helpers.h +++ b/tools/testing/selftests/bpf/bpf_tcp_helpers.h @@ -234,12 +234,15 @@ extern void tcp_cong_avoid_ai(struct tcp_sock *tp, __= u32 w, __u32 acked) __ksym; #define MPTCP_SUBFLOWS_MAX 8 =20 struct mptcp_subflow_context { + unsigned long avg_pacing_rate; __u32 backup : 1; + __u8 stale_count; struct sock *tcp_sock; /* tcp sk backpointer */ } __attribute__((preserve_access_index)); =20 struct mptcp_sched_data { struct sock *last_snd; + int snd_burst; bool reinject; struct mptcp_subflow_context *contexts[MPTCP_SUBFLOWS_MAX]; } __attribute__((preserve_access_index)); diff --git a/tools/testing/selftests/bpf/progs/mptcp_bpf_burst.c b/tools/te= sting/selftests/bpf/progs/mptcp_bpf_burst.c new file mode 100644 index 000000000000..305829162ce5 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/mptcp_bpf_burst.c @@ -0,0 +1,195 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2023, SUSE. */ + +#include +#include +#include "bpf_tcp_helpers.h" + +char _license[] SEC("license") =3D "GPL"; + +struct subflow_send_info { + struct sock *ssk; + __u64 linger_time; +}; + +static inline struct sock * +mptcp_subflow_tcp_sock(const struct mptcp_subflow_context *subflow) +{ + return subflow->tcp_sock; +} + +extern bool mptcp_subflow_active(struct mptcp_subflow_context *subflow) __= ksym; +extern long mptcp_timeout_from_subflow(const struct mptcp_subflow_context = *subflow) __ksym; +extern void mptcp_set_timer(struct sock *sk, long tout) __ksym; +extern bool mptcp_stream_memory_free(struct mptcp_subflow_context *subflow= ) __ksym; +extern __u64 mptcp_get_linger_time(struct sock *ssk, __u32 pace) __ksym; +extern __u32 mptcp_get_burst(const struct mptcp_sock *msk) __ksym; +extern unsigned long mptcp_get_pacing_rate(struct mptcp_subflow_context *s= ubflow, __u32 burst) __ksym; +extern bool mptcp_rtx_and_write_queues_empty(const struct sock *sk) __ksym; +extern void mptcp_pm_subflow_chk_stale(const struct mptcp_sock *msk, struc= t sock *ssk) __ksym; + +#define SSK_MODE_ACTIVE 0 +#define SSK_MODE_BACKUP 1 +#define SSK_MODE_MAX 2 + +SEC("struct_ops/mptcp_sched_burst_init") +void BPF_PROG(mptcp_sched_burst_init, const struct mptcp_sock *msk) +{ +} + +SEC("struct_ops/mptcp_sched_burst_release") +void BPF_PROG(mptcp_sched_burst_release, const struct mptcp_sock *msk) +{ +} + +void BPF_STRUCT_OPS(bpf_burst_data_init, const struct mptcp_sock *msk, + struct mptcp_sched_data *data) +{ + mptcp_sched_data_set_contexts(msk, data); +} + +static int bpf_burst_get_send(const struct mptcp_sock *msk, + struct mptcp_sched_data *data) +{ + struct subflow_send_info send_info[SSK_MODE_MAX]; + struct mptcp_subflow_context *subflow; + struct sock *sk =3D (struct sock *)msk; + int i, nr_active =3D 0; + __u32 pace, burst; + __u64 linger_time; + struct sock *ssk; + long tout =3D 0; + int nr =3D 0; + + /* pick the subflow with the lower wmem/wspace ratio */ + for (i =3D 0; i < SSK_MODE_MAX; ++i) { + send_info[i].ssk =3D NULL; + send_info[i].linger_time =3D -1; + } + + for (i =3D 0; i < MPTCP_SUBFLOWS_MAX; i++) { + if (!data->contexts[i]) + break; + + subflow =3D data->contexts[i]; + ssk =3D mptcp_subflow_tcp_sock(subflow); + if (!mptcp_subflow_active(subflow)) + continue; + + tout =3D max(tout, mptcp_timeout_from_subflow(subflow)); + nr_active +=3D !subflow->backup; + pace =3D subflow->avg_pacing_rate; + if (!pace) { + /* init pacing rate from socket */ + subflow->avg_pacing_rate =3D ssk->sk_pacing_rate; + pace =3D subflow->avg_pacing_rate; + if (!pace) + continue; + } + + linger_time =3D mptcp_get_linger_time(ssk, pace); + if (linger_time < send_info[subflow->backup].linger_time) { + send_info[subflow->backup].ssk =3D ssk; + send_info[subflow->backup].linger_time =3D linger_time; + } + } + mptcp_set_timer(sk, tout); + + /* pick the best backup if no other subflow is active */ + if (!nr_active) + send_info[SSK_MODE_ACTIVE].ssk =3D send_info[SSK_MODE_BACKUP].ssk; + + ssk =3D send_info[SSK_MODE_ACTIVE].ssk; + if (!ssk) + return -1; + + for (i =3D 0; i < MPTCP_SUBFLOWS_MAX; i++) { + if (data->contexts[i]->tcp_sock =3D=3D ssk) { + nr =3D i; + break; + } + } + subflow =3D data->contexts[nr]; + + if (!mptcp_stream_memory_free(subflow)) + return -1; + + burst =3D mptcp_get_burst(msk); + if (!burst) + goto out; + + data->snd_burst =3D burst; + subflow->avg_pacing_rate =3D mptcp_get_pacing_rate(subflow, burst); + +out: + mptcp_subflow_set_scheduled(subflow, true); + return 0; +} + +static int bpf_burst_get_retrans(const struct mptcp_sock *msk, + struct mptcp_sched_data *data) +{ + struct sock *backup =3D NULL, *pick =3D NULL, *ret =3D NULL; + struct mptcp_subflow_context *subflow; + int min_stale_count =3D INT_MAX; + struct sock *ssk; + int i, nr =3D 0; + + for (i =3D 0; i < MPTCP_SUBFLOWS_MAX; i++) { + if (!data->contexts[i]) + break; + + subflow =3D data->contexts[i]; + ssk =3D mptcp_subflow_tcp_sock(subflow); + if (!mptcp_subflow_active(subflow)) + continue; + + /* still data outstanding at TCP level? skip this */ + if (!mptcp_rtx_and_write_queues_empty(ssk)) { + mptcp_pm_subflow_chk_stale(msk, ssk); + min_stale_count =3D min(min_stale_count, subflow->stale_count); + continue; + } + + if (subflow->backup) { + if (!backup) + backup =3D ssk; + continue; + } + + if (!pick) + pick =3D ssk; + } + + if (pick) + ret =3D pick; + ret =3D min_stale_count > 1 ? backup : NULL; + + if (ret) { + for (i =3D 0; i < MPTCP_SUBFLOWS_MAX; i++) { + if (data->contexts[i]->tcp_sock =3D=3D ret) { + nr =3D i; + break; + } + } + } + mptcp_subflow_set_scheduled(data->contexts[nr], true); + return 0; +} + +int BPF_STRUCT_OPS(bpf_burst_get_subflow, const struct mptcp_sock *msk, + struct mptcp_sched_data *data) +{ + if (data->reinject) + return bpf_burst_get_retrans(msk, data); 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charset="utf-8" This patch adds the burst BPF MPTCP scheduler test: test_burst(). 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 sent on both net devices. 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 a968641cc94a..b9f6dcf995fd 100644 --- a/tools/testing/selftests/bpf/prog_tests/mptcp.c +++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c @@ -10,6 +10,7 @@ #include "mptcp_bpf_bkup.skel.h" #include "mptcp_bpf_rr.skel.h" #include "mptcp_bpf_red.skel.h" +#include "mptcp_bpf_burst.skel.h" =20 char NS_TEST[32]; =20 @@ -455,6 +456,41 @@ static void test_red(void) mptcp_bpf_red__destroy(red_skel); } =20 +static void test_burst(void) +{ + struct mptcp_bpf_burst *burst_skel; + int server_fd, client_fd; + struct nstoken *nstoken; + struct bpf_link *link; + + burst_skel =3D mptcp_bpf_burst__open_and_load(); + if (!ASSERT_OK_PTR(burst_skel, "bpf_burst__open_and_load")) + return; + + link =3D bpf_map__attach_struct_ops(burst_skel->maps.burst); + if (!ASSERT_OK_PTR(link, "bpf_map__attach_struct_ops")) { + mptcp_bpf_burst__destroy(burst_skel); + return; + } + + nstoken =3D sched_init("subflow", "bpf_burst"); + if (!ASSERT_OK_PTR(nstoken, "sched_init:bpf_burst")) + goto fail; + server_fd =3D start_mptcp_server(AF_INET, ADDR_1, 0, 0); + client_fd =3D connect_to_fd(server_fd, 0); + + send_data(server_fd, client_fd); + ASSERT_OK(has_bytes_sent(ADDR_1), "has_bytes_sent addr 1"); + ASSERT_OK(has_bytes_sent(ADDR_2), "has_bytes_sent addr 2"); + + close(client_fd); + close(server_fd); +fail: + cleanup_netns(nstoken); + bpf_link__destroy(link); + mptcp_bpf_burst__destroy(burst_skel); +} + void test_mptcp(void) { if (test__start_subtest("base")) @@ -467,4 +503,6 @@ void test_mptcp(void) test_rr(); if (test__start_subtest("red")) test_red(); + if (test__start_subtest("burst")) + test_burst(); } --=20 2.35.3