From: Stanislav Fomichev <sdf@google.com>
To: netdev@vger.kernel.org, bpf@vger.kernel.org
Cc: davem@davemloft.net, ast@kernel.org, daniel@iogearbox.net,
Stanislav Fomichev <sdf@google.com>,
Eric Dumazet <edumazet@google.com>,
Priyaranjan Jha <priyarjha@google.com>,
Yuchung Cheng <ycheng@google.com>,
Soheil Hassas Yeganeh <soheil@google.com>
Subject: [PATCH bpf-next 4/8] bpf: add icsk_retransmits to bpf_tcp_sock
Date: Mon, 1 Jul 2019 13:48:17 -0700 [thread overview]
Message-ID: <20190701204821.44230-5-sdf@google.com> (raw)
In-Reply-To: <20190701204821.44230-1-sdf@google.com>
Add some inet_connection_sock fields to bpf_tcp_sock that might be useful
for debugging congestion control issues.
Cc: Eric Dumazet <edumazet@google.com>
Cc: Priyaranjan Jha <priyarjha@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Cc: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: Stanislav Fomichev <sdf@google.com>
---
include/uapi/linux/bpf.h | 1 +
net/core/filter.c | 20 +++++++++++++++++++-
2 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index bfb0b1a76684..ead27aebf491 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -3078,6 +3078,7 @@ struct bpf_tcp_sock {
*/
__u32 delivered; /* Total data packets delivered incl. rexmits */
__u32 delivered_ce; /* Like the above but only ECE marked packets */
+ __u32 icsk_retransmits; /* Number of unrecovered [RTO] timeouts */
};
struct bpf_sock_tuple {
diff --git a/net/core/filter.c b/net/core/filter.c
index 3da4b6c38b46..089aaea0ccc6 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -5544,7 +5544,8 @@ static const struct bpf_func_proto bpf_sock_addr_sk_lookup_udp_proto = {
bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
struct bpf_insn_access_aux *info)
{
- if (off < 0 || off >= offsetofend(struct bpf_tcp_sock, delivered_ce))
+ if (off < 0 || off >= offsetofend(struct bpf_tcp_sock,
+ icsk_retransmits))
return false;
if (off % size != 0)
@@ -5575,6 +5576,20 @@ u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
offsetof(struct tcp_sock, FIELD)); \
} while (0)
+#define BPF_INET_SOCK_GET_COMMON(FIELD) \
+ do { \
+ BUILD_BUG_ON(FIELD_SIZEOF(struct inet_connection_sock, \
+ FIELD) > \
+ FIELD_SIZEOF(struct bpf_tcp_sock, FIELD)); \
+ *insn++ = BPF_LDX_MEM(BPF_FIELD_SIZEOF( \
+ struct inet_connection_sock, \
+ FIELD), \
+ si->dst_reg, si->src_reg, \
+ offsetof( \
+ struct inet_connection_sock, \
+ FIELD)); \
+ } while (0)
+
if (insn > insn_buf)
return insn - insn_buf;
@@ -5661,6 +5676,9 @@ u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
case offsetof(struct bpf_tcp_sock, delivered_ce):
BPF_TCP_SOCK_GET_COMMON(delivered_ce);
break;
+ case offsetof(struct bpf_tcp_sock, icsk_retransmits):
+ BPF_INET_SOCK_GET_COMMON(icsk_retransmits);
+ break;
}
return insn - insn_buf;
--
2.22.0.410.gd8fdbe21b5-goog
next prev parent reply other threads:[~2019-07-01 20:48 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-01 20:48 [PATCH bpf-next 0/8] bpf: TCP RTT sock_ops bpf callback Stanislav Fomichev
2019-07-01 20:48 ` [PATCH bpf-next 1/8] bpf: add BPF_CGROUP_SOCK_OPS callback that is executed on every RTT Stanislav Fomichev
2019-07-01 20:48 ` [PATCH bpf-next 2/8] bpf: split shared bpf_tcp_sock and bpf_sock_ops implementation Stanislav Fomichev
2019-07-01 20:48 ` [PATCH bpf-next 3/8] bpf: add dsack_dups/delivered{,_ce} to bpf_tcp_sock Stanislav Fomichev
2019-07-01 20:48 ` Stanislav Fomichev [this message]
2019-07-01 20:48 ` [PATCH bpf-next 5/8] bpf/tools: sync bpf.h Stanislav Fomichev
2019-07-01 20:48 ` [PATCH bpf-next 6/8] selftests/bpf: test BPF_SOCK_OPS_RTT_CB Stanislav Fomichev
2019-07-01 23:40 ` Y Song
2019-07-02 0:07 ` Stanislav Fomichev
2019-07-02 0:26 ` Y Song
2019-07-01 20:48 ` [PATCH bpf-next 7/8] samples/bpf: add sample program that periodically dumps TCP stats Stanislav Fomichev
2019-07-02 0:15 ` Y Song
2019-07-02 0:31 ` Stanislav Fomichev
2019-07-02 0:39 ` Y Song
2019-07-01 20:48 ` [PATCH bpf-next 8/8] samples/bpf: fix tcp_bpf.readme detach command Stanislav Fomichev
2019-07-01 21:03 ` [PATCH bpf-next 0/8] bpf: TCP RTT sock_ops bpf callback Soheil Hassas Yeganeh
2019-07-01 21:15 ` Yuchung Cheng
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