From patchwork Tue Jul 11 15:31:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michal Suchanek X-Patchwork-Id: 13308958 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EEE49EB64DC for ; Tue, 11 Jul 2023 15:32:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232376AbjGKPcS (ORCPT ); Tue, 11 Jul 2023 11:32:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47884 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232243AbjGKPcR (ORCPT ); Tue, 11 Jul 2023 11:32:17 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2001:67c:2178:6::1c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6CD88ED; Tue, 11 Jul 2023 08:32:16 -0700 (PDT) Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out1.suse.de (Postfix) with ESMTP id 17BB722724; Tue, 11 Jul 2023 15:32:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1689089535; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=WhVOBmTkvX5Yn7jpRUVGFl+hIu6p2Hs/7XqxlXkfIA8=; b=MZjChiLgNZKvQmv0tVIAliYRwhstqe1f31P9kGY8cEew/jlNbN8HnnpLQHWoI4NdfC+UwC e+CdRjvv0zaDMQ1db94BfGFxdGiDDw+HpU43XGI+edaGkzvWaNhE8vrw6CuobRm2EaoiUu k1kqepReQsITyhpEj9gv4EmkCiqXikc= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1689089535; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=WhVOBmTkvX5Yn7jpRUVGFl+hIu6p2Hs/7XqxlXkfIA8=; b=7GTOZt4Ni28BiPz+U5RqpkWF8v/p3k1Gq6bQhtzx6gsFk1MjJmd/XxXpV12PIG2JbICQ7f ZfT7YxEHFNz28ZAw== Received: from kitsune.suse.cz (kitsune.suse.cz [10.100.12.127]) by relay2.suse.de (Postfix) with ESMTP id AE0312C142; Tue, 11 Jul 2023 15:32:14 +0000 (UTC) From: Michal Suchanek To: linux-modules@vger.kernel.org Cc: Michal Suchanek , Takashi Iwai , Lucas De Marchi , =?utf-8?q?Michal_Koutn=C3=BD?= , Jiri Slaby , Jan Engelhardt , Masahiro Yamada , Nathan Chancellor , Nick Desaulniers , Nicolas Schier , linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/4] kmod /usr support Date: Tue, 11 Jul 2023 17:31:15 +0200 Message-ID: <20230711153126.28876-1-msuchanek@suse.de> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org Hello, with these patches it is possible to install kernel modules under an arbitrary prefix - eg. moving the /lib/modules to /usr/lib/modules with /usr prefix. While the modprobe.d and depmod.d search which already includes multiple paths is expanded to also include $(prefix) the module directory still supports only one location, only a different one under $(module_prefix). Having kmod search multiple module locations while only one is supported now might break some assumption about relative modulke path corresponding to a specific file, would require more invasive changes to implement, and is not supportive of the goal of moving the modules away from /lib. Both kmod and the kernel need to be patched to make use of this feature. Patched kernel is backwards compatible with older kmod. Patched kmod with empty $(module_prefix) is equivalent to unpatched kmod. Thanks Michal Link: https://lore.kernel.org/linux-modules/20210112160211.5614-1-msuchanek@suse.de/ Michal Suchanek (4): man/depmod.d: Fix incorrect /usr/lib search path libkmod, depmod: Load modprobe.d, depmod.d from $prefix/lib. kmod: Add config command to show compile time configuration as JSON libkmod, depmod, modprobe: Search for kernel modules under ${module_prefix} Makefile.am | 4 +- configure.ac | 7 ++ libkmod/libkmod.c | 7 +- man/Makefile.am | 10 ++- man/depmod.d.xml | 9 ++- man/depmod.xml | 4 +- man/kmod.xml | 6 ++ man/modinfo.xml | 2 +- man/modprobe.d.xml | 1 + man/modprobe.xml | 2 +- man/modules.dep.xml | 6 +- testsuite/module-playground/Makefile | 2 +- testsuite/setup-rootfs.sh | 109 +++++++++++++++------------ testsuite/test-depmod.c | 16 ++-- testsuite/test-testsuite.c | 8 +- tools/depmod.c | 7 +- tools/kmod.c | 40 ++++++++++ tools/modinfo.c | 4 +- tools/modprobe.c | 4 +- tools/static-nodes.c | 6 +- 20 files changed, 166 insertions(+), 88 deletions(-)