[PATCH bpf-next v3 5/7] libbpf: add support for tracing session

[Menglong Dong]

Add BPF_TRACE_SESSION to libbpf and bpftool.

Signed-off-by: Menglong Dong <dong...@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 339b19797237..caed2b689068 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 b90574f39d1c..50d10d01315a 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",
@@ -9607,6 +9608,8 @@ 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),
-- 
2.51.1