From patchwork Sun Aug 18 12:50:38 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: 13767416 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 58BFE4DA1F; Sun, 18 Aug 2024 12:50:45 +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=1723985445; cv=none; b=BT7lXBIpUQFnF+nedWrZGjLQPjUZ+mmGrP77S8kKscBAvw79bb5IYTh0Sr5r1Dp/zxEqiClhNDzpEqRBvOdsVLGFsltlIRLBE1Q48rvWX23MMLKJc+FLTEF2cS2XvmLy6cKzWZd/xSRuKLq1OQ+zxhEDNUlnGjNUukXGibACYAU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723985445; c=relaxed/simple; bh=6LRuOvaZstDE6JovoZfd2CiVZaFBRwbUc1jP+rvwiso=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=Dt15u2ED8m++TGH56OTeYESyEcy6hwTVID8/1kKbI3wIbm+BKAm6X8B2TWuKM2DkOuLZ9iCjG6ZxG7E8WCyqPeKVdHg1SHcsLPGL8LwKoSJ6HZMNyMg0GW8kcycpJ+K1gqS6ySKeuot6m3hfqWKA0gso9RdzxWet6Vz/7gk3+bo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nRrnb+zy; 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="nRrnb+zy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AAC87C32786; Sun, 18 Aug 2024 12:50:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1723985444; bh=6LRuOvaZstDE6JovoZfd2CiVZaFBRwbUc1jP+rvwiso=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nRrnb+zynC3cpLi33tBYB/S6GTiKmAEtVOJej/AozpqY760/DMuauBURWpTzlbsR0 iQr+yR6/Gf2Hyk+ZLwaQGXG3/L2wbpVn+w1LKI5POembwwq74IpCAwjfl5tKVZ9e4o Barp5zwtNun4PffB5P8KzbU2A33nO5eBSEo/Pm47a06n8G9YdxTmiq5oUO6d0v/tSE oKiDANepqSdj7ffuPAOOlavWGJK1phdrkWCLG+QC6gSXqpOh/jPXFywG1buA+GjOUO neMhZXwPoxdLOWVDUnHXdqKU0HR/+vyFKPIeS7aZWwGs9g0qORhxJ7Yk3+FK8iZbDK 0bdQ3O4LWeobQ== From: "Masami Hiramatsu (Google)" To: Alexei Starovoitov , Steven Rostedt , Florent Revest Cc: linux-trace-kernel@vger.kernel.org, LKML , Martin KaFai Lau , bpf , Sven Schnelle , Alexei Starovoitov , Jiri Olsa , Arnaldo Carvalho de Melo , Daniel Borkmann , Alan Maguire , Mark Rutland , Peter Zijlstra , Thomas Gleixner , Guo Ren Subject: [PATCH v13 16/20] tracing/fprobe: Remove nr_maxactive from fprobe Date: Sun, 18 Aug 2024 21:50:38 +0900 Message-Id: <172398543867.293426.11881956158744660094.stgit@devnote2> X-Mailer: git-send-email 2.34.1 In-Reply-To: <172398527264.293426.2050093948411376857.stgit@devnote2> References: <172398527264.293426.2050093948411376857.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 | 44 ++++++------------------------------------- 2 files changed, 6 insertions(+), 40 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 86cd6a8c806a..20ef5cd5d419 100644 --- a/kernel/trace/trace_fprobe.c +++ b/kernel/trace/trace_fprobe.c @@ -422,7 +422,6 @@ static struct trace_fprobe *alloc_trace_fprobe(const char *group, const char *event, const char *symbol, struct tracepoint *tpoint, - int maxactive, int nargs, bool is_return) { struct trace_fprobe *tf; @@ -442,7 +441,6 @@ static struct trace_fprobe *alloc_trace_fprobe(const char *group, tf->fp.entry_handler = fentry_dispatcher; tf->tpoint = tpoint; - tf->fp.nr_maxactive = maxactive; ret = trace_probe_init(&tf->tp, event, group, false, nargs); if (ret < 0) @@ -1021,12 +1019,11 @@ 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]; @@ -1048,33 +1045,13 @@ 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); @@ -1084,12 +1061,6 @@ 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, @@ -1147,8 +1118,7 @@ static int __trace_fprobe_create(int argc, const char *argv[]) goto out; /* setup a probe */ - tf = alloc_trace_fprobe(group, event, symbol, tpoint, maxactive, - argc, is_return); + tf = alloc_trace_fprobe(group, event, symbol, tpoint, argc, is_return); if (IS_ERR(tf)) { ret = PTR_ERR(tf); /* This must return -ENOMEM, else there is a bug */ @@ -1230,8 +1200,6 @@ 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));