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Wed, 17 Dec 2025 01:55:39 -0800 (PST) From: Menglong Dong X-Google-Original-From: Menglong Dong 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 Message-ID: <20251217095445.218428-8-dongml2@chinatelecom.cn> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251217095445.218428-1-dongml2@chinatelecom.cn> References: <20251217095445.218428-1-dongml2@chinatelecom.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add BPF_TRACE_SESSION to libbpf and bpftool. Signed-off-by: Menglong Dong --- 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 =3D 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[] =3D { [BPF_TRACE_FENTRY] =3D "trace_fentry", [BPF_TRACE_FEXIT] =3D "trace_fexit", [BPF_MODIFY_RETURN] =3D "modify_return", + [BPF_TRACE_SESSION] =3D "trace_session", [BPF_LSM_MAC] =3D "lsm_mac", [BPF_LSM_CGROUP] =3D "lsm_cgroup", [BPF_SK_LOOKUP] =3D "sk_lookup", @@ -9853,6 +9854,8 @@ static const struct bpf_sec_def section_defs[] =3D { SEC_DEF("fentry.s+", TRACING, BPF_TRACE_FENTRY, SEC_ATTACH_BTF | SEC_SLE= EPABLE, 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_SLEEP= ABLE, 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, atta= ch_lsm), --=20 2.52.0