[PATCH bpf-next v4 7/9] libbpf: add support for tracing session

BPF List
 help / color / mirror / Atom feed

From: Menglong Dong <menglong8.dong@gmail.com>
To: ast@kernel.org, andrii@kernel.org
Cc: davem@davemloft.net, dsahern@kernel.org, daniel@iogearbox.net,
	martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org,
	yonghong.song@linux.dev, john.fastabend@gmail.com,
	kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com,
	jolsa@kernel.org, tglx@linutronix.de, mingo@redhat.com,
	bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org,
	hpa@zytor.com, netdev@vger.kernel.org, bpf@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH bpf-next v4 7/9] libbpf: add support for tracing session
Date: Wed, 17 Dec 2025 17:54:43 +0800	[thread overview]
Message-ID: <20251217095445.218428-8-dongml2@chinatelecom.cn> (raw)
In-Reply-To: <20251217095445.218428-1-dongml2@chinatelecom.cn>

Add BPF_TRACE_SESSION to libbpf and bpftool.

Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
---
 tools/bpf/bpftool/common.c | 1 +
 tools/lib/bpf/bpf.c        | 2 ++
 tools/lib/bpf/libbpf.c     | 3 +++
 3 files changed, 6 insertions(+)

diff --git a/tools/bpf/bpftool/common.c b/tools/bpf/bpftool/common.c
index e8daf963ecef..534be6cfa2be 100644
--- a/tools/bpf/bpftool/common.c
+++ b/tools/bpf/bpftool/common.c
@@ -1191,6 +1191,7 @@ const char *bpf_attach_type_input_str(enum bpf_attach_type t)
 	case BPF_TRACE_FENTRY:			return "fentry";
 	case BPF_TRACE_FEXIT:			return "fexit";
 	case BPF_MODIFY_RETURN:			return "mod_ret";
+	case BPF_TRACE_SESSION:			return "fsession";
 	case BPF_SK_REUSEPORT_SELECT:		return "sk_skb_reuseport_select";
 	case BPF_SK_REUSEPORT_SELECT_OR_MIGRATE:	return "sk_skb_reuseport_select_or_migrate";
 	default:	return libbpf_bpf_attach_type_str(t);
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 21b57a629916..5042df4a5df7 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -794,6 +794,7 @@ int bpf_link_create(int prog_fd, int target_fd,
 	case BPF_TRACE_FENTRY:
 	case BPF_TRACE_FEXIT:
 	case BPF_MODIFY_RETURN:
+	case BPF_TRACE_SESSION:
 	case BPF_LSM_MAC:
 		attr.link_create.tracing.cookie = OPTS_GET(opts, tracing.cookie, 0);
 		if (!OPTS_ZEROED(opts, tracing))
@@ -917,6 +918,7 @@ int bpf_link_create(int prog_fd, int target_fd,
 	case BPF_TRACE_FENTRY:
 	case BPF_TRACE_FEXIT:
 	case BPF_MODIFY_RETURN:
+	case BPF_TRACE_SESSION:
 		return bpf_raw_tracepoint_open(NULL, prog_fd);
 	default:
 		return libbpf_err(err);
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index c7c79014d46c..0c095195df31 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -115,6 +115,7 @@ static const char * const attach_type_name[] = {
 	[BPF_TRACE_FENTRY]		= "trace_fentry",
 	[BPF_TRACE_FEXIT]		= "trace_fexit",
 	[BPF_MODIFY_RETURN]		= "modify_return",
+	[BPF_TRACE_SESSION]		= "trace_session",
 	[BPF_LSM_MAC]			= "lsm_mac",
 	[BPF_LSM_CGROUP]		= "lsm_cgroup",
 	[BPF_SK_LOOKUP]			= "sk_lookup",
@@ -9853,6 +9854,8 @@ static const struct bpf_sec_def section_defs[] = {
 	SEC_DEF("fentry.s+",		TRACING, BPF_TRACE_FENTRY, SEC_ATTACH_BTF | SEC_SLEEPABLE, attach_trace),
 	SEC_DEF("fmod_ret.s+",		TRACING, BPF_MODIFY_RETURN, SEC_ATTACH_BTF | SEC_SLEEPABLE, attach_trace),
 	SEC_DEF("fexit.s+",		TRACING, BPF_TRACE_FEXIT, SEC_ATTACH_BTF | SEC_SLEEPABLE, attach_trace),
+	SEC_DEF("fsession+",		TRACING, BPF_TRACE_SESSION, SEC_ATTACH_BTF, attach_trace),
+	SEC_DEF("fsession.s+",		TRACING, BPF_TRACE_SESSION, SEC_ATTACH_BTF | SEC_SLEEPABLE, attach_trace),
 	SEC_DEF("freplace+",		EXT, 0, SEC_ATTACH_BTF, attach_trace),
 	SEC_DEF("lsm+",			LSM, BPF_LSM_MAC, SEC_ATTACH_BTF, attach_lsm),
 	SEC_DEF("lsm.s+",		LSM, BPF_LSM_MAC, SEC_ATTACH_BTF | SEC_SLEEPABLE, attach_lsm),
-- 
2.52.0

next prev parent reply	other threads:[~2025-12-17  9:55 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-12-17  9:54 [PATCH bpf-next v4 0/9] bpf: tracing session supporting Menglong Dong
2025-12-17  9:54 ` [PATCH bpf-next v4 1/9] bpf: add tracing session support Menglong Dong
2025-12-19  0:55   ` Andrii Nakryiko
2025-12-19  1:24     ` Menglong Dong
2025-12-17  9:54 ` [PATCH bpf-next v4 2/9] bpf: use last 8-bits for the nr_args in trampoline Menglong Dong
2025-12-17  9:54 ` [PATCH bpf-next v4 3/9] bpf: add the kfunc bpf_fsession_is_return Menglong Dong
2025-12-17  9:54 ` [PATCH bpf-next v4 4/9] bpf: add the kfunc bpf_fsession_cookie Menglong Dong
2025-12-19  0:55   ` Andrii Nakryiko
2025-12-19  1:31     ` Menglong Dong
2025-12-19 12:01       ` Menglong Dong
2025-12-17  9:54 ` [PATCH bpf-next v4 5/9] bpf,x86: introduce emit_st_r0_imm64() for trampoline Menglong Dong
2025-12-17  9:54 ` [PATCH bpf-next v4 6/9] bpf,x86: add tracing session supporting for x86_64 Menglong Dong
2025-12-19  0:55   ` Andrii Nakryiko
2025-12-19  1:41     ` Menglong Dong
2025-12-19 16:56       ` Andrii Nakryiko
2025-12-17  9:54 ` Menglong Dong [this message]
2025-12-19  0:55   ` [PATCH bpf-next v4 7/9] libbpf: add support for tracing session Andrii Nakryiko
2025-12-19  1:42     ` Menglong Dong
2025-12-17  9:54 ` [PATCH bpf-next v4 8/9] selftests/bpf: add testcases " Menglong Dong
2025-12-17 10:24   ` bot+bpf-ci
2025-12-17 11:42     ` Menglong Dong
2025-12-17  9:54 ` [PATCH bpf-next v4 9/9] selftests/bpf: test fsession mixed with fentry and fexit Menglong Dong
2025-12-17 10:24   ` bot+bpf-ci
2025-12-17 10:37     ` Menglong Dong
2025-12-19  0:55 ` [PATCH bpf-next v4 0/9] bpf: tracing session supporting Andrii Nakryiko
2025-12-19  1:18   ` Menglong Dong
2025-12-19 16:55     ` Andrii Nakryiko
2025-12-20  1:12       ` Menglong Dong
2025-12-20  9:01         ` Menglong Dong
2025-12-20 12:22           ` Menglong Dong

find likely ancestor, descendant, or conflicting patches for this message:
( dfblob:e8daf963ece dfblob:534be6cfa2b dfblob:21b57a62991
dfblob:5042df4a5df dfblob:c7c79014d46 dfblob:0c095195df3 )
 OR (
bs:"[PATCH bpf-next v4 7/9] libbpf: add support for tracing session" )
	(help)

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20251217095445.218428-8-dongml2@chinatelecom.cn \
    --to=menglong8.dong@gmail.com \
    --cc=andrii@kernel.org \
    --cc=ast@kernel.org \
    --cc=bp@alien8.de \
    --cc=bpf@vger.kernel.org \
    --cc=daniel@iogearbox.net \
    --cc=dave.hansen@linux.intel.com \
    --cc=davem@davemloft.net \
    --cc=dsahern@kernel.org \
    --cc=eddyz87@gmail.com \
    --cc=haoluo@google.com \
    --cc=hpa@zytor.com \
    --cc=john.fastabend@gmail.com \
    --cc=jolsa@kernel.org \
    --cc=kpsingh@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=martin.lau@linux.dev \
    --cc=mingo@redhat.com \
    --cc=netdev@vger.kernel.org \
    --cc=sdf@fomichev.me \
    --cc=song@kernel.org \
    --cc=tglx@linutronix.de \
    --cc=x86@kernel.org \
    --cc=yonghong.song@linux.dev \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Be sure your reply has a Subject: header at the top and a blank line before the message body.

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox