selftests/bpf: Add a few tcp helper functions and macros to bpf_tracing_net.h

This patch adds a few tcp related helper functions to bpf_tracing_net.h.
They will be useful for both tcp-cc and network tracing related
bpf progs. They have already been in the bpf_tcp_helpers.h. This change
is needed to retire the bpf_tcp_helpers.h and consolidate all tests
to vmlinux.h (i.e. bpf_tracing_net.h).

Some of the helpers (tcp_sk and inet_csk) are also defined in
bpf_cc_cubic.c and they are removed. While at it, remove
the vmlinux.h from bpf_cc_cubic.c. bpf_tracing_net.h (which has
vmlinux.h after this patch) is enough and will be consistent
with the other tcp-cc tests in the later patches.

The other TCP_* macro additions will be needed for the bpf_dctcp
changes in the later patch.

Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://lore.kernel.org/r/20240509175026.3423614-3-martin.lau@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Martin KaFai Lau 2024-05-09 10:50:18 -07:00 committed by Alexei Starovoitov
parent c0338e609e
commit cbaec46df6
2 changed files with 42 additions and 13 deletions

View File

@ -13,11 +13,9 @@
* kernel functions.
*/
#include "vmlinux.h"
#include "bpf_tracing_net.h"
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
#include "bpf_tracing_net.h"
#define BPF_STRUCT_OPS(name, args...) \
SEC("struct_ops/"#name) \
@ -40,16 +38,6 @@ extern __u32 tcp_reno_undo_cwnd(struct sock *sk) __ksym;
extern void cubictcp_acked(struct sock *sk, const struct ack_sample *sample) __ksym;
extern void cubictcp_cong_avoid(struct sock *sk, __u32 ack, __u32 acked) __ksym;
static struct inet_connection_sock *inet_csk(const struct sock *sk)
{
return (struct inet_connection_sock *)sk;
}
static struct tcp_sock *tcp_sk(const struct sock *sk)
{
return (struct tcp_sock *)sk;
}
static bool before(__u32 seq1, __u32 seq2)
{
return (__s32)(seq1-seq2) < 0;

View File

@ -2,6 +2,9 @@
#ifndef __BPF_TRACING_NET_H__
#define __BPF_TRACING_NET_H__
#include <vmlinux.h>
#include <bpf/bpf_core_read.h>
#define AF_INET 2
#define AF_INET6 10
@ -46,6 +49,13 @@
#define TCP_CA_NAME_MAX 16
#define TCP_NAGLE_OFF 1
#define TCP_ECN_OK 1
#define TCP_ECN_QUEUE_CWR 2
#define TCP_ECN_DEMAND_CWR 4
#define TCP_ECN_SEEN 8
#define TCP_CONG_NEEDS_ECN 0x2
#define ICSK_TIME_RETRANS 1
#define ICSK_TIME_PROBE0 3
#define ICSK_TIME_LOSS_PROBE 5
@ -129,4 +139,35 @@
#define tcp_jiffies32 ((__u32)bpf_jiffies64())
static inline struct inet_connection_sock *inet_csk(const struct sock *sk)
{
return (struct inet_connection_sock *)sk;
}
static inline void *inet_csk_ca(const struct sock *sk)
{
return (void *)inet_csk(sk)->icsk_ca_priv;
}
static inline struct tcp_sock *tcp_sk(const struct sock *sk)
{
return (struct tcp_sock *)sk;
}
static inline bool tcp_in_slow_start(const struct tcp_sock *tp)
{
return tp->snd_cwnd < tp->snd_ssthresh;
}
static inline bool tcp_is_cwnd_limited(const struct sock *sk)
{
const struct tcp_sock *tp = tcp_sk(sk);
/* If in slow start, ensure cwnd grows to twice what was ACKed. */
if (tcp_in_slow_start(tp))
return tp->snd_cwnd < 2 * tp->max_packets_out;
return !!BPF_CORE_READ_BITFIELD(tp, is_cwnd_limited);
}
#endif