From patchwork Tue Oct 15 01:31:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Masami Hiramatsu (Google)" X-Patchwork-Id: 13835617 X-Patchwork-Delegate: bpf@iogearbox.net Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 5668D17A90F; Tue, 15 Oct 2024 01:31:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728955882; cv=none; b=CbsLdxbsHUrMtSi4nnzj1OjNRjmVI8/TVibyMbvxp7fe+6pPITsxVNiXRLnTpLERqFR50ThtoImb+l7+vXEeUOmXz9lVywqWkMNG4tRhzF4COXwv0dhUL8Ss/T3+mv4bZPPo3WZiS/r6Avl4CV1A1D8A8wpf4Mzl/Jht0qaguZo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728955882; c=relaxed/simple; bh=pUZUnplXc7WKf9dqULx4QHpPfKN550lqxPSvem6gB2I=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=uRVRyF3U8J8ZwGj68pbi9+7SfICbuqfHzAnD9sRrL1AKraRXjTP05IA/yMiG0aBudVyw9S86DrQhx/05zEk0XgqPkINpZynZ/5XuShZZ+M93Su5/njxnkV5UDm1f0E0HUyz0UwsAnSY/vwi82zoXMRoGVQcW8awf22IuecXQW8M= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CrtWEluv; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="CrtWEluv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8AAAAC4CEC3; Tue, 15 Oct 2024 01:31:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728955881; bh=pUZUnplXc7WKf9dqULx4QHpPfKN550lqxPSvem6gB2I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CrtWEluvcsDeZ5HSYUMCZ2+pZcpvSGlxgdZpw63CDAv+2SFvQaMpy6W9g6njHHy06 37LxPCOKuXb6MFOBo3gUvB7mJr17bL/ZIUGvrkU1bb3AWp+GgXNdwschaV7XkoAPk/ T78le1gfWWNpQ+JT/mJgKd9fq1UtrB8rhzbIhA42V3m/XqPPO74c1QJhvktSr7FiCK /GGR2axuflukNSXTQ+h9iYOQAS+d02GMjoQ3W1Ll3ov4h4LyOFsK3RVAgoAhLiH5HL GTmNHYKT9TeGzrRMn1V/kpRRRNyBXdeiJH2vhuwwgKktv1UJ6MtDhBOk6U1OfJC6CC 7ttR9DMwWqH/w== From: "Masami Hiramatsu (Google)" To: Alexei Starovoitov , Steven Rostedt , Florent Revest Cc: linux-trace-kernel@vger.kernel.org, LKML , Martin KaFai Lau , bpf , Alexei Starovoitov , Jiri Olsa , Alan Maguire , Mark Rutland , linux-arch@vger.kernel.org Subject: [PATCH v16 14/18] tracing/fprobe: Remove nr_maxactive from fprobe Date: Tue, 15 Oct 2024 10:31:17 +0900 Message-ID: <172895587749.107311.18138719578280933178.stgit@devnote2> X-Mailer: git-send-email 2.43.0 In-Reply-To: <172895571278.107311.14000164546881236558.stgit@devnote2> References: <172895571278.107311.14000164546881236558.stgit@devnote2> User-Agent: StGit/0.19 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Masami Hiramatsu (Google) Remove depercated fprobe::nr_maxactive. This involves fprobe events to rejects the maxactive number. Signed-off-by: Masami Hiramatsu (Google) --- Changes in v2: - Newly added. --- include/linux/fprobe.h | 2 -- kernel/trace/trace_fprobe.c | 43 ++++++------------------------------------- 2 files changed, 6 insertions(+), 39 deletions(-) diff --git a/include/linux/fprobe.h b/include/linux/fprobe.h index 2d06bbd99601..a86b3e4df2a0 100644 --- a/include/linux/fprobe.h +++ b/include/linux/fprobe.h @@ -54,7 +54,6 @@ struct fprobe_hlist { * @nmissed: The counter for missing events. * @flags: The status flag. * @entry_data_size: The private data storage size. - * @nr_maxactive: The max number of active functions. (*deprecated) * @entry_handler: The callback function for function entry. * @exit_handler: The callback function for function exit. * @hlist_array: The fprobe_hlist for fprobe search from IP hash table. @@ -63,7 +62,6 @@ struct fprobe { unsigned long nmissed; unsigned int flags; size_t entry_data_size; - int nr_maxactive; fprobe_entry_cb entry_handler; fprobe_exit_cb exit_handler; diff --git a/kernel/trace/trace_fprobe.c b/kernel/trace/trace_fprobe.c index 41595e38fea5..0a17ed405b6a 100644 --- a/kernel/trace/trace_fprobe.c +++ b/kernel/trace/trace_fprobe.c @@ -424,7 +424,6 @@ static struct trace_fprobe *alloc_trace_fprobe(const char *group, const char *symbol, struct tracepoint *tpoint, struct module *mod, - int maxactive, int nargs, bool is_return) { struct trace_fprobe *tf; @@ -445,7 +444,6 @@ static struct trace_fprobe *alloc_trace_fprobe(const char *group, tf->tpoint = tpoint; tf->mod = mod; - tf->fp.nr_maxactive = maxactive; ret = trace_probe_init(&tf->tp, event, group, false, nargs); if (ret < 0) @@ -1098,12 +1096,11 @@ static int __trace_fprobe_create(int argc, const char *argv[]) * FETCHARG:TYPE : use TYPE instead of unsigned long. */ struct trace_fprobe *tf = NULL; - int i, len, new_argc = 0, ret = 0; + int i, new_argc = 0, ret = 0; bool is_return = false; char *symbol = NULL; const char *event = NULL, *group = FPROBE_EVENT_SYSTEM; const char **new_argv = NULL; - int maxactive = 0; char buf[MAX_EVENT_NAME_LEN]; char gbuf[MAX_EVENT_NAME_LEN]; char sbuf[KSYM_NAME_LEN]; @@ -1126,33 +1123,13 @@ static int __trace_fprobe_create(int argc, const char *argv[]) trace_probe_log_init("trace_fprobe", argc, argv); - event = strchr(&argv[0][1], ':'); - if (event) - event++; - - if (isdigit(argv[0][1])) { - if (event) - len = event - &argv[0][1] - 1; - else - len = strlen(&argv[0][1]); - if (len > MAX_EVENT_NAME_LEN - 1) { - trace_probe_log_err(1, BAD_MAXACT); - goto parse_error; - } - memcpy(buf, &argv[0][1], len); - buf[len] = '\0'; - ret = kstrtouint(buf, 0, &maxactive); - if (ret || !maxactive) { + if (argv[0][1] != '\0') { + if (argv[0][1] != ':') { + trace_probe_log_set_index(0); trace_probe_log_err(1, BAD_MAXACT); goto parse_error; } - /* fprobe rethook instances are iterated over via a list. The - * maximum should stay reasonable. - */ - if (maxactive > RETHOOK_MAXACTIVE_MAX) { - trace_probe_log_err(1, MAXACT_TOO_BIG); - goto parse_error; - } + event = &argv[0][2]; } trace_probe_log_set_index(1); @@ -1162,12 +1139,6 @@ static int __trace_fprobe_create(int argc, const char *argv[]) if (ret < 0) goto parse_error; - if (!is_return && maxactive) { - trace_probe_log_set_index(0); - trace_probe_log_err(1, BAD_MAXACT_TYPE); - goto parse_error; - } - trace_probe_log_set_index(0); if (event) { ret = traceprobe_parse_event_name(&event, &group, gbuf, @@ -1231,7 +1202,7 @@ static int __trace_fprobe_create(int argc, const char *argv[]) /* setup a probe */ tf = alloc_trace_fprobe(group, event, symbol, tpoint, tp_mod, - maxactive, argc, is_return); + argc, is_return); if (IS_ERR(tf)) { ret = PTR_ERR(tf); /* This must return -ENOMEM, else there is a bug */ @@ -1311,8 +1282,6 @@ static int trace_fprobe_show(struct seq_file *m, struct dyn_event *ev) seq_putc(m, 't'); else seq_putc(m, 'f'); - if (trace_fprobe_is_return(tf) && tf->fp.nr_maxactive) - seq_printf(m, "%d", tf->fp.nr_maxactive); seq_printf(m, ":%s/%s", trace_probe_group_name(&tf->tp), trace_probe_name(&tf->tp));