From patchwork Fri Sep 6 10:32:32 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthias Maennich X-Patchwork-Id: 11134981 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C0AD41395 for ; Fri, 6 Sep 2019 10:33:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A0E62206CD for ; Fri, 6 Sep 2019 10:33:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="ZKx0qdxN" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2393087AbfIFKdK (ORCPT ); Fri, 6 Sep 2019 06:33:10 -0400 Received: from mail-qt1-f201.google.com ([209.85.160.201]:47470 "EHLO mail-qt1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2393069AbfIFKdG (ORCPT ); Fri, 6 Sep 2019 06:33:06 -0400 Received: by mail-qt1-f201.google.com with SMTP id v16so5781731qtp.14 for ; Fri, 06 Sep 2019 03:33:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=jYdCAZcv6rUUG7KW+wn6gKBF+UzymWMvqv0zOHj9hbE=; b=ZKx0qdxNQMJawIXCeiY8Nkpljkp7KQhcaQObQ4SWu2QmQNURGLfmfWzZSvaUmQ7Xss PD2fCrhFozVh3dIE5w7Wry0AwCaAR3TGuPLkHNdACd3nfRAFQBpQsdVJ/NhTn6/vLQLN Ru7OyMARdWduTJdEV9XXz4m05U5fOnchED0XJTkUnnf0tMOoylRFP+JDasglNs/6kW+6 xSQNHPcXH1rvF5qPd/MRBVUwTtZRs6rHa8jniJQywcaSlPFT/AwaWUCaHqZRobin2CJG 1XgoNK705v7ORTEVCliCLW6vz9Xqdci5W17fWuRehJTxPyZ2zuQzgbV3vHCjpkT3qfrh dbQA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=jYdCAZcv6rUUG7KW+wn6gKBF+UzymWMvqv0zOHj9hbE=; b=WN7YkexTuKpbkbFwsNTcjj2PDOtyaCameoCTI9PMpb86cGFLxsLQ1DlZ6nUvTd4TD7 w3C/lj6fGBWomhh2MBz1zRiZpyb+kjpn7cM3uYnOpqebo9+nJYWNUPVhOB0dYhElv0r2 39ngu4cunV0fNTPmJal2aKap8cWgqh3LxMkQCWDcMClWWrwRL/4eL1O0zGEaRQBKfExw WQcYW/2pD43KRNZvYG876xWTcaVmjClwaMC9Hg9+ZOXCyRgmx07zwQM3BuJzQV11XjMa wqGruitAjf2iSqugApYbqJMoEkiZvHehXCVbEHPcFc2yfN46l2BwqcX9ZsKhWYc25v0f T06Q== X-Gm-Message-State: APjAAAXGHIUjy9COsbHq+1f3SsR71Z/sIg0GfP5Y+QJuHjE4zZ5OmiqX bIfW3m9YTlQW254EeKLJSWSJS9iLdBl+Fg== X-Google-Smtp-Source: APXvYqzygfHWzXU1h9L+MfCrBdRx+fEDw8GAiroiyYdFXEH21sWnVmK3pkwPB3iqxBNhqzFTrxfdHrhG6YBUTA== X-Received: by 2002:ae9:e212:: with SMTP id c18mr8084551qkc.254.1567765985166; Fri, 06 Sep 2019 03:33:05 -0700 (PDT) Date: Fri, 6 Sep 2019 11:32:32 +0100 In-Reply-To: <20190906103235.197072-1-maennich@google.com> Message-Id: <20190906103235.197072-9-maennich@google.com> Mime-Version: 1.0 References: <20180716122125.175792-1-maco@android.com> <20190906103235.197072-1-maennich@google.com> X-Mailer: git-send-email 2.23.0.187.g17f5b7556c-goog Subject: [PATCH v5 08/11] scripts: Coccinelle script for namespace dependencies. From: Matthias Maennich To: linux-kernel@vger.kernel.org Cc: kernel-team@android.com, maennich@google.com, arnd@arndb.de, gregkh@linuxfoundation.org, jeyu@kernel.org, joel@joelfernandes.org, lucas.de.marchi@gmail.com, maco@android.com, sspatil@google.com, will@kernel.org, yamada.masahiro@socionext.com, linux-kbuild@vger.kernel.org, linux-modules@vger.kernel.org, linux-usb@vger.kernel.org, usb-storage@lists.one-eyed-alien.net, Julia Lawall Sender: owner-linux-modules@vger.kernel.org Precedence: bulk List-ID: A script that uses the '.ns_deps' files generated by modpost to automatically add the required symbol namespace dependencies to each module. Usage: 1) Move some symbols to a namespace with EXPORT_SYMBOL_NS() or define DEFAULT_SYMBOL_NAMESPACE 2) Run 'make' (or 'make modules') and get warnings about modules not importing that namespace. 3) Run 'make nsdeps' to automatically add required import statements to said modules. This makes it easer for subsystem maintainers to introduce and maintain symbol namespaces into their codebase. Co-developed-by: Martijn Coenen Signed-off-by: Martijn Coenen Acked-by: Julia Lawall Reviewed-by: Greg Kroah-Hartman Signed-off-by: Matthias Maennich --- MAINTAINERS | 5 ++ Makefile | 12 +++++ scripts/Makefile.modpost | 4 +- scripts/coccinelle/misc/add_namespace.cocci | 23 ++++++++ scripts/nsdeps | 58 +++++++++++++++++++++ 5 files changed, 101 insertions(+), 1 deletion(-) create mode 100644 scripts/coccinelle/misc/add_namespace.cocci create mode 100644 scripts/nsdeps diff --git a/MAINTAINERS b/MAINTAINERS index e7a47b5210fd..3b170c11a0e6 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11436,6 +11436,11 @@ S: Maintained T: git git://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/nolibc.git F: tools/include/nolibc/ +NSDEPS +M: Matthias Maennich +S: Maintained +F: scripts/nsdeps + NTB AMD DRIVER M: Shyam Sundar S K L: linux-ntb@googlegroups.com diff --git a/Makefile b/Makefile index 0cdb957ae2c3..014d55b400ca 100644 --- a/Makefile +++ b/Makefile @@ -1500,6 +1500,9 @@ help: @echo ' headerdep - Detect inclusion cycles in headers' @echo ' coccicheck - Check with Coccinelle' @echo '' + @echo 'Tools:' + @echo ' nsdeps - Generate missing symbol namespace dependencies' + @echo '' @echo 'Kernel selftest:' @echo ' kselftest - Build and run kernel selftest (run as root)' @echo ' Build, install, and boot kernel before' @@ -1687,6 +1690,15 @@ quiet_cmd_tags = GEN $@ tags TAGS cscope gtags: FORCE $(call cmd,tags) +# Script to generate missing namespace dependencies +# --------------------------------------------------------------------------- + +PHONY += nsdeps + +nsdeps: modules + $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost nsdeps + $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ + # Scripts to check various things for consistency # --------------------------------------------------------------------------- diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost index 26e6574ecd08..743fe3a2e885 100644 --- a/scripts/Makefile.modpost +++ b/scripts/Makefile.modpost @@ -56,7 +56,8 @@ MODPOST = scripts/mod/modpost \ $(if $(KBUILD_EXTMOD),$(addprefix -e ,$(KBUILD_EXTRA_SYMBOLS))) \ $(if $(KBUILD_EXTMOD),-o $(modulesymfile)) \ $(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E) \ - $(if $(KBUILD_MODPOST_WARN),-w) + $(if $(KBUILD_MODPOST_WARN),-w) \ + $(if $(filter nsdeps,$(MAKECMDGOALS)),-d) ifdef MODPOST_VMLINUX @@ -134,6 +135,7 @@ $(modules): %.ko :%.o %.mod.o FORCE targets += $(modules) +nsdeps: __modpost # Add FORCE to the prequisites of a target to force it to be always rebuilt. # --------------------------------------------------------------------------- diff --git a/scripts/coccinelle/misc/add_namespace.cocci b/scripts/coccinelle/misc/add_namespace.cocci new file mode 100644 index 000000000000..c832bb6445a8 --- /dev/null +++ b/scripts/coccinelle/misc/add_namespace.cocci @@ -0,0 +1,23 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +/// Adds missing MODULE_IMPORT_NS statements to source files +/// +/// This script is usually called from scripts/nsdeps with -D ns= to +/// add a missing namespace tag to a module source file. +/// + +@has_ns_import@ +declarer name MODULE_IMPORT_NS; +identifier virtual.ns; +@@ +MODULE_IMPORT_NS(ns); + +// Add missing imports, but only adjacent to a MODULE_LICENSE statement. +// That ensures we are adding it only to the main module source file. +@do_import depends on !has_ns_import@ +declarer name MODULE_LICENSE; +expression license; +identifier virtual.ns; +@@ +MODULE_LICENSE(license); ++ MODULE_IMPORT_NS(ns); diff --git a/scripts/nsdeps b/scripts/nsdeps new file mode 100644 index 000000000000..ac2b6031dd13 --- /dev/null +++ b/scripts/nsdeps @@ -0,0 +1,58 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Linux kernel symbol namespace import generator +# +# This script requires a minimum spatch version. +SPATCH_REQ_VERSION="1.0.4" + +DIR="$(dirname $(readlink -f $0))/.." +SPATCH="`which ${SPATCH:=spatch}`" +if [ ! -x "$SPATCH" ]; then + echo 'spatch is part of the Coccinelle project and is available at http://coccinelle.lip6.fr/' + exit 1 +fi + +SPATCH_REQ_VERSION_NUM=$(echo $SPATCH_REQ_VERSION | ${DIR}/scripts/ld-version.sh) +SPATCH_VERSION=$($SPATCH --version | head -1 | awk '{print $3}') +SPATCH_VERSION_NUM=$(echo $SPATCH_VERSION | ${DIR}/scripts/ld-version.sh) + +if [ "$SPATCH_VERSION_NUM" -lt "$SPATCH_REQ_VERSION_NUM" ] ; then + echo "spatch needs to be version $SPATCH_REQ_VERSION or higher" + exit 1 +fi + +generate_deps_for_ns() { + $SPATCH --very-quiet --in-place --sp-file \ + $srctree/scripts/coccinelle/misc/add_namespace.cocci -D ns=$1 $2 +} + +generate_deps() { + local mod_name=`basename $@ .ko` + local mod_file=`echo $@ | sed -e 's/\.ko/\.mod/'` + local ns_deps_file=`echo $@ | sed -e 's/\.ko/\.ns_deps/'` + if [ ! -f "$ns_deps_file" ]; then return; fi + local mod_source_files=`cat $mod_file | sed -n 1p \ + | sed -e 's/\.o/\.c/g' \ + | sed "s/[^ ]* */${srctree}\/&/g"` + for ns in `cat $ns_deps_file`; do + echo "Adding namespace $ns to module $mod_name (if needed)." + generate_deps_for_ns $ns $mod_source_files + # sort the imports + for source_file in $mod_source_files; do + sed '/MODULE_IMPORT_NS/Q' $source_file > ${source_file}.tmp + offset=$(wc -l ${source_file}.tmp | awk '{print $1;}') + cat $source_file | grep MODULE_IMPORT_NS | sort -u >> ${source_file}.tmp + tail -n +$((offset +1)) ${source_file} | grep -v MODULE_IMPORT_NS >> ${source_file}.tmp + if ! diff -q ${source_file} ${source_file}.tmp; then + mv ${source_file}.tmp ${source_file} + else + rm ${source_file}.tmp + fi + done + done +} + +for f in `cat $objtree/modules.order`; do + generate_deps $f +done +