netdev - [PATCH bpf-next 5/9] bpf: sync bpf.h to tools and update bpf

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Date:   Mon, 18 Feb 2019 21:38:35 -0800
From:   brakmo <brakmo@...com>
To:     netdev <netdev@...r.kernel.org>
CC:     Martin Lau <kafai@...com>, Alexei Starovoitov <ast@...com>,
        Daniel Borkmann --cc=Kernel Team 
        <"daniel@...earbox.netKernel-team"@fb.com>
Subject: [PATCH bpf-next 5/9] bpf: sync bpf.h to tools and update bpf_helpers.h

This patch syncs the uapi bpf.h to tools/ and also updates
bpf_herlpers.h in tools/

Signed-off-by: Lawrence Brakmo <brakmo@...com>
---
 tools/include/uapi/linux/bpf.h            | 27 ++++++++++++++++++++++-
 tools/testing/selftests/bpf/bpf_helpers.h |  6 +++++
 2 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index bcdd2474eee7..a78936acccae 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -2359,6 +2359,28 @@ union bpf_attr {
  *	Return
  *		A **struct bpf_tcp_sock** pointer on success, or NULL in
  *		case of failure.
+ *
+ * int bpf_tcp_enter_cwr(struct bpf_tcp_sock *tp)
+ *    Description
+ *        Make a tcp_sock enter CWR state.
+ *    Return
+ *        0
+ *
+ * int bpf_skb_set_ecn(struct sk_buf *skb, int val)
+ *	Description
+ *		Sets ECN bits (2) of IP header. Works with IPv6 and IPv4.
+ *		val should be one of 0, 1, 2, 3.
+ *	Return
+ *		-EINVAL on error (e.g. val > 3), 0 otherwise.
+ *
+ * int bpf_tcp_check_probe_timer(struct bpf_tcp_sock *tp, int when_us)
+ *	Description
+ *		Checks that there are no packets out and there is no pending
+ *		timer. If both of these are true, it bounds when_us by
+ *		TCP_TIMEOUT_MIN (2 jiffies) or TCP_RTO_MIN (200ms) and
+ *		sets the probe timer.
+ *	Return
+ *		0
  */
 #define __BPF_FUNC_MAPPER(FN)		\
 	FN(unspec),			\
@@ -2457,7 +2479,10 @@ union bpf_attr {
 	FN(spin_lock),			\
 	FN(spin_unlock),		\
 	FN(sk_fullsock),		\
-	FN(tcp_sock),
+	FN(tcp_sock),			\
+	FN(tcp_enter_cwr),		\
+	FN(skb_set_ecn),		\
+	FN(tcp_check_probe_timer),
 
 /* integer value in 'imm' field of BPF_CALL instruction selects which helper
  * function eBPF program intends to call
diff --git a/tools/testing/selftests/bpf/bpf_helpers.h b/tools/testing/selftests/bpf/bpf_helpers.h
index d9999f1ed1d2..8cf5f30034b7 100644
--- a/tools/testing/selftests/bpf/bpf_helpers.h
+++ b/tools/testing/selftests/bpf/bpf_helpers.h
@@ -180,6 +180,12 @@ static struct bpf_sock *(*bpf_sk_fullsock)(struct bpf_sock *sk) =
 	(void *) BPF_FUNC_sk_fullsock;
 static struct bpf_tcp_sock *(*bpf_tcp_sock)(struct bpf_sock *sk) =
 	(void *) BPF_FUNC_tcp_sock;
+static int (*bpf_tcp_enter_cwr)(struct bpf_tcp_sock *tp) =
+	(void *) BPF_FUNC_tcp_enter_cwr;
+static int (*bpf_skb_set_ecn)(void *ctx, int val) =
+	(void *) BPF_FUNC_skb_set_ecn;
+static int (*bpf_tcp_check_probe_timer)(struct bpf_tcp_sock *tp, int when_us) =
+	(void *) BPF_FUNC_tcp_check_probe_timer;
 
 /* llvm builtin functions that eBPF C program may use to
  * emit BPF_LD_ABS and BPF_LD_IND instructions
-- 
2.17.1