From d920179b3d4842a0e27cae54fdddbe5ef3977e73 Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Fri, 8 Nov 2024 14:45:34 +0100 Subject: bpf: Add support for uprobe multi session attach Adding support to attach BPF program for entry and return probe of the same function. This is common use case which at the moment requires to create two uprobe multi links. Adding new BPF_TRACE_UPROBE_SESSION attach type that instructs kernel to attach single link program to both entry and exit probe. It's possible to control execution of the BPF program on return probe simply by returning zero or non zero from the entry BPF program execution to execute or not the BPF program on return probe respectively. Signed-off-by: Jiri Olsa Signed-off-by: Andrii Nakryiko Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20241108134544.480660-4-jolsa@kernel.org --- tools/lib/bpf/libbpf.c | 1 + 1 file changed, 1 insertion(+) (limited to 'tools/lib/bpf/libbpf.c') diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 711173acbcef..faac1c79840d 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -133,6 +133,7 @@ static const char * const attach_type_name[] = { [BPF_NETKIT_PRIMARY] = "netkit_primary", [BPF_NETKIT_PEER] = "netkit_peer", [BPF_TRACE_KPROBE_SESSION] = "trace_kprobe_session", + [BPF_TRACE_UPROBE_SESSION] = "trace_uprobe_session", }; static const char * const link_type_name[] = { -- cgit v1.2.3