From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qk1-f177.google.com (mail-qk1-f177.google.com [209.85.222.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3E678361656 for ; Wed, 14 Jan 2026 22:13:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.222.177 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768428843; cv=none; b=f/6gNDS4xfPHnn576r7L5IXfBu47KILmMdRfh8Cx1bYEBMZO66dive/khEcXAtSBPVaNTiMIbyPl/m1/+mzJ0E169jwh1xZBR2w+yu0cW1vTe/k1BbqeGVUrLqnJWzpc3tLb1V7VdBewPZk48z2sPWSjtVaciQ8XA6oZLiB1alM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768428843; c=relaxed/simple; bh=Frl8g7gPNJZnVuF1cortnAJ5yPmXpbnchhHZccoy5S8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=IfZ+t86lhYKJ7YbWo7a0HpV5yhSMBz9/Si0VxuQ0rp829B9Ln706VNLXJScX0586Nh2RQfln7628NxmVYg2OZO7ZI+fdxACofNlsgGX2Ga5wE9WH5IjVqTmppEwn9uvHdjAVH6KU4dj8WTuU67wQTfwIU+k52yt3pNB05ygo62U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=Erf8d9oF; arc=none smtp.client-ip=209.85.222.177 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Erf8d9oF" Received: by mail-qk1-f177.google.com with SMTP id af79cd13be357-8c5349ba802so25481185a.1 for ; Wed, 14 Jan 2026 14:13:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1768428825; x=1769033625; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=5gG/T9PvlN7aaWKP3v8uvJnzLqAaoC9Sf8EP4s01LO0=; b=Erf8d9oFtq6hQp6TsprMFlAAV1Rp4tW/kqQykHoOoyI5xunoLIPFIqPXZ5i3ILFtBF q5Gt+QRNqs29RFYUr0kvQcqHbiu4nw/umjhIKNk2V1a4/BdQ0xTuJ6XCA3e/91vpahVS gOLh0PvCdJoJPoKf4MAR8nvca9eV63Ca46gGxNq7Sln3dpNI87bBKR3roy8NlhHKtjog rLxMyNXLoCKq+7c8UCh1nzANmsqiuL36JNqEv9LTfL6BM5vQiCQpIhLeneaLZD5p3Aks 1L/ainQw23HM3nVDwVfPw0Qmo92Om/EmrvViLBWt2Bv0FDwStI81fA47g/giKbJHbOEx pKrg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768428825; x=1769033625; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=5gG/T9PvlN7aaWKP3v8uvJnzLqAaoC9Sf8EP4s01LO0=; b=mnWb0s8LOTuS64yztTGEJgQ6Ovvz3OeImXuWw8ZRY73VLMr6hKLfARkbDnWwaLddcv gfEqrgz6nTqEWBxwrm4GPPQNuxE+w37q9Ud5Fazm0L+kUOoAR11koVcyDSWjElEvKXBo g7oXfuVA5MFEGh1FtxLaax/xRjbQPCPou61qhMA3X4/Mt3ZLgUzdcz4EcCtovtw6M+s8 hgkrEmwncpGwW9qec2+f07OjW3O2bbGS8UR+fsD6+cARrq7prVvARSW/+iBVbLHR4QhC jRv5xfniepKA7bqROoz1jU/xanfMl53cA1poswTKcOmBfzQOuhOk2L0B9EI/5iYplTdB A70Q== X-Forwarded-Encrypted: i=1; AJvYcCXNHY0eRtB299tRJycxJIsOjt8+I1vAE7M4SE+SNoORfHRV8lFQU+7d0L1certBpnSC0Qh5NwuUCL3oRLuYf6pkj9w=@vger.kernel.org X-Gm-Message-State: AOJu0Ywcu8udnIUFkpX8Wink7cqBasXU6MHy5vAm9gmPOWpujWeCToVa v3Hro64D7uFCF8+/nGgSrzul8cRnkA64jX/OybgYeTDrLgl58zXSnHQV X-Gm-Gg: AY/fxX6uKsk7Kr3Y67Tph7zJANpoZiC8cUTEw7hJhllj1Lz3bqikZfeOVmsKrk7GAhn xpl+Ie0ZOmP2A3744ZDUSA8G+vZlPA2snmJNy4vKQzJOsasD+uv/cZeTuH9B5RaZu31jYiV1xw4 rXjNxKrvKUxzGmOnr7oZHg549gQbBNLC1GmPmR/b7HH+dAjrUc+Uwcue5BtXt9dLna8UnwHTMGG trw3CcGM9a28uxjeMH/4h8RtGG/uP7nqgx9icpmVUei84tcVV7RMrMRDPDK48cTcQWNM/rpeWST RKTl3kAgfJMpCSyrftCnbO926GeqCbqCSFrR/FsKAj688il6HY52smeAuxkjoVrRcTROLNjEIfJ loSbgtGDCzKsnPz/j0OSFSwRsiNhIJv5U1idZTsAimN8ACkSpW0a8ujNW4zQHSBxr0uP51CeZjE /nrTNZ7hyzjWbOXVOhnw3tUg5H7zgf/72EtR42ujYCKDa0Q0El3n3BldoPnlMMw8Api6b8SXQ= X-Received: by 2002:a05:620a:708a:b0:8b5:222d:ce3b with SMTP id af79cd13be357-8c52fbdce95mr670335885a.52.1768428825363; Wed, 14 Jan 2026 14:13:45 -0800 (PST) Received: from pc.mynetworksettings.com ([2600:4041:4491:2000:c1bc:6046:8762:e96]) by smtp.gmail.com with ESMTPSA id af79cd13be357-8c530bb685fsm250007785a.44.2026.01.14.14.13.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Jan 2026 14:13:44 -0800 (PST) From: "Seokwoo Chung (Ryan)" To: rostedt@goodmis.org, mhiramat@kernel.org, corbet@lwn.net, shuah@kernel.org Cc: mathieu.desnoyers@efficios.com, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, "Seokwoo Chung (Ryan)" Subject: [PATCH v5 1/3] tracing/fprobe: Support comma-separated symbols and :entry/:exit Date: Wed, 14 Jan 2026 17:13:38 -0500 Message-ID: <20260114221341.128038-2-seokwoo.chung130@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260114221341.128038-1-seokwoo.chung130@gmail.com> References: <20251126184110.72241-1-seokwoo.chung130@gmail.com> <20260114221341.128038-1-seokwoo.chung130@gmail.com> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Signed-off-by: Seokwoo Chung (Ryan) --- kernel/trace/trace.c | 4 +-- kernel/trace/trace_fprobe.c | 49 ++++++++++++++++++++----------------- kernel/trace/trace_probe.h | 2 ++ 3 files changed, 31 insertions(+), 24 deletions(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 10cdcc7b194e..73b59d47dfe7 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -5578,8 +5578,8 @@ static const char readme_msg[] = "\t r[maxactive][:[/][]] []\n" #endif #ifdef CONFIG_FPROBE_EVENTS - "\t f[:[/][]] [:entry|:exit] []\n" - "\t (single symbols still accept %return)\n" + "\t f[:[/][]] [%return] []\n" + "\t f[:[/][]] [:entry|:exit] []\n" "\t t[:[/][]] []\n" #endif #ifdef CONFIG_HIST_TRIGGERS diff --git a/kernel/trace/trace_fprobe.c b/kernel/trace/trace_fprobe.c index 5a2a41eea603..1663c341ddb4 100644 --- a/kernel/trace/trace_fprobe.c +++ b/kernel/trace/trace_fprobe.c @@ -187,16 +187,23 @@ DEFINE_FREE(tuser_put, struct tracepoint_user *, */ struct trace_fprobe { struct dyn_event devent; - char *filter; + struct fprobe fp; - bool list_mode; - char *nofilter; const char *symbol; - struct trace_probe tp; + char *filter; + char *nofilter; + bool tprobe; struct tracepoint_user *tuser; + + struct trace_probe tp; }; +static inline bool trace_fprobe_has_list(const struct trace_fprobe *tf) +{ + return tf->filter || tf->nofilter; +} + static bool is_trace_fprobe(struct dyn_event *ev) { return ev->ops == &trace_fprobe_ops; @@ -847,7 +854,7 @@ static int __register_trace_fprobe(struct trace_fprobe *tf) * - list_mode: pass filter/nofilter * - single: pass symbol only (legacy) */ - if (tf->list_mode) + if (trace_fprobe_has_list(tf)) return register_fprobe(&tf->fp, tf->filter, tf->nofilter); return register_fprobe(&tf->fp, tf->symbol, NULL); } @@ -1188,11 +1195,18 @@ static int parse_fprobe_spec(const char *in, bool is_tracepoint, *base = NULL; *filter = NULL; *nofilter = NULL; *is_return = false; *list_mode = false; - if (is_tracepoint) { + if (is_tracepoint) + { if (strchr(in, ',') || strchr(in, ':')) + { + trace_probe_log_err(0, BAD_TP_NAME); return -EINVAL; + } if (strstr(in, "%return")) + { + trace_probe_log_err(p - in, BAD_TP_NAME); return -EINVAL; + } for (p = in; *p; p++) if (!isalnum(*p) && *p != '_') return -EINVAL; @@ -1225,6 +1239,7 @@ static int parse_fprobe_spec(const char *in, bool is_tracepoint, } else if (!strcmp(p, ":entry")) { *(char *)p = '\0'; } else { + trace_probe_log_err(p - work, BAD_LIST_SUFFIX); return -EINVAL; } } @@ -1233,6 +1248,7 @@ static int parse_fprobe_spec(const char *in, bool is_tracepoint, list = !!strchr(work, ','); if (list && legacy_ret) { + trace_probe_log_err(p - work, BAD_LEGACY_RET); return -EINVAL; } @@ -1245,12 +1261,9 @@ static int parse_fprobe_spec(const char *in, bool is_tracepoint, if (list) { char *tmp = b, *tok; - size_t fsz, nfsz; - fsz = nfsz = strlen(b) + 1; - - f = kzalloc(fsz, GFP_KERNEL); - nf = kzalloc(nfsz, GFP_KERNEL); + f = kzalloc(strlen(b) + 1, GFP_KERNEL); + nf = kzalloc(strlen(b) + 1, GFP_KERNEL); if (!f || !nf) return -ENOMEM; @@ -1261,6 +1274,7 @@ static int parse_fprobe_spec(const char *in, bool is_tracepoint, if (*tok == '\0') { trace_probe_log_err(tmp - b - 1, BAD_TP_NAME); return -EINVAL; + } if (neg) tok++; @@ -1455,17 +1469,8 @@ static int trace_fprobe_create_internal(int argc, const char *argv[], /* carry list parsing result into tf */ if (!is_tracepoint) { - tf->list_mode = list_mode; - if (parsed_filter) { - tf->filter = kstrdup(parsed_filter, GFP_KERNEL); - if (!tf->filter) - return -ENOMEM; - } - if (parsed_nofilter) { - tf->nofilter = kstrdup(parsed_nofilter, GFP_KERNEL); - if (!tf->nofilter) - return -ENOMEM; - } + tf->filter = no_free_ptr(parsed_filter); + tf->nofilter = no_free_ptr(parsed_nofilter); } /* parse arguments */ diff --git a/kernel/trace/trace_probe.h b/kernel/trace/trace_probe.h index 9fc56c937130..b8b0544eb7cd 100644 --- a/kernel/trace/trace_probe.h +++ b/kernel/trace/trace_probe.h @@ -494,9 +494,11 @@ extern int traceprobe_define_arg_fields(struct trace_event_call *event_call, C(BAD_PROBE_ADDR, "Invalid probed address or symbol"), \ C(NON_UNIQ_SYMBOL, "The symbol is not unique"), \ C(BAD_RETPROBE, "Retprobe address must be an function entry"), \ + C(BAD_LEGACY_RET, "Legacy %return not allowed with list"), \ C(NO_TRACEPOINT, "Tracepoint is not found"), \ C(BAD_TP_NAME, "Invalid character in tracepoint name"),\ C(BAD_ADDR_SUFFIX, "Invalid probed address suffix"), \ + C(BAD_LIST_SUFFIX, "Bad list suffix"), \ C(NO_GROUP_NAME, "Group name is not specified"), \ C(GROUP_TOO_LONG, "Group name is too long"), \ C(BAD_GROUP_NAME, "Group name must follow the same rules as C identifiers"), \ -- 2.43.0