From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-184.mta1.migadu.com (out-184.mta1.migadu.com [95.215.58.184]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BB19C391E4B for ; Sun, 9 Aug 2026 15:01:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.184 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786287716; cv=none; b=SyrE79rkpQZ38YvvQ+yrkNzdI3Oq16v1SLDw/jknAnkun9ppjpmoQSJGbCySpXjE4RAJT2SvM7IQs+AmjG7+Y/NsCKBwniUQBuLdMMrJjF+4qaeA0ZwIgS/fu5XOR7/EQ0ebaUrSyx53KAAXiX/Qqie1b4h0AtwzCvNFPZiIOsc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786287716; c=relaxed/simple; bh=3oNs8QSrFoe5bUDHUnLg5XCzSZ0JCxLnph4plr9mrKM=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=LT1dmADO+Wqnzo8tiKbVL00xUg0RPzW/0Hi1VTid2MkLF6uXAv7xcB6eJPgbkWMlbgOoZ3APxBpLCCEIIC+oi5NgnVh5WwEM1nRTOkmbaQ7XZDig7i7oWbmQ2o2wMCuI7ZH5HLbcImL8z3CwEvnnvAhKaRawg28rY1vpqef15PA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=SZPA9Knj; arc=none smtp.client-ip=95.215.58.184 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="SZPA9Knj" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1786287711; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=KP+Yi6mHI4T84FcQS0INnfN/N5ZjzIUJJSjrPWRGYuE=; b=SZPA9KnjuC0GirlVYdSwgj8GrkTkmTpk3VBdRooUPPjP1FBTPFiMTxjJYOk9PxI8BgedlP kVrH4ZF1A/puOLuaTX04FJLlNQSgKIQfKWUepGh15GSLs3XginZx9qyxXErc6qMvTmbFX5 Q6xttTrQN9dPtOeD9V9/+1dn97kp7r0= From: Leon Hwang To: bpf@vger.kernel.org Cc: Alexei Starovoitov , Daniel Borkmann , John Fastabend , Andrii Nakryiko , Eduard Zingerman , Kumar Kartikeya Dwivedi , Martin KaFai Lau , Song Liu , Yonghong Song , Jiri Olsa , Emil Tsalapatis , Ihor Solodrai , Quentin Monnet , Shuah Khan , Leon Hwang , Mykyta Yatsenko , Avinash Duduskar , Anton Protopopov , Amery Hung , Jordan Rife , Rong Tao , Eyal Birger , Pu Lehui , Jingguo Tan , Lin Ma , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH bpf-next 00/13] bpf: Add tracing_multi link support for bpf progs Date: Sun, 9 Aug 2026 23:00:58 +0800 Message-ID: <20260809150111.45000-1-leon.hwang@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT Similar to the tracing_multi link support for kernel functions [1], add support for bpf progs. When attaching to bpf progs, it must attaches to the target by text poke way. [1] https://lore.kernel.org/bpf/20260606123955.345967-1-jolsa@kernel.org/ Leon Hwang (13): bpf: Initialize ftrace_managed in bpf_trampoline_get bpf: Factor out update_fentry_multi helper bpf: Drop unnecessary ftrace_location() in update_fentry_multi() bpf: Add tracing_multi link support for bpf progs libbpf: Add tracing_multi link support for bpf progs bpf: Add tracing_multi link fdinfo support for bpf progs bpf: Add tracing_multi link info support for bpf progs selftests/bpf: Add tracing_multi bpf prog attach test selftests/bpf: Add tracing_multi bpf prog attach failure tests selftests/bpf: Add tracing_multi bpf prog cookie test selftests/bpf: Add tracing_multi bpf prog rollback test selftests/bpf: Add tracing_multi bpf prog link info test selftests/bpf: Test tailcall with fentry.multi include/linux/bpf.h | 3 + include/uapi/linux/bpf.h | 6 +- kernel/bpf/trampoline.c | 87 +++--- kernel/bpf/verifier.c | 22 +- kernel/trace/bpf_trace.c | 212 ++++++++++++--- tools/bpf/bpftool/link.c | 59 +++- tools/include/uapi/linux/bpf.h | 6 +- tools/lib/bpf/bpf.c | 1 + tools/lib/bpf/bpf.h | 2 + tools/lib/bpf/libbpf.c | 39 ++- tools/lib/bpf/libbpf.h | 4 +- tools/lib/bpf/libbpf_internal.h | 1 + .../selftests/bpf/prog_tests/fill_link_info.c | 170 ++++++++++-- .../selftests/bpf/prog_tests/tailcalls.c | 62 +++++ .../selftests/bpf/prog_tests/tracing_multi.c | 254 ++++++++++++++++++ .../selftests/bpf/progs/tracing_multi_bpf.c | 61 +++++ 16 files changed, 869 insertions(+), 120 deletions(-) create mode 100644 tools/testing/selftests/bpf/progs/tracing_multi_bpf.c -- 2.55.0