From patchwork Thu Feb 27 14:46:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Anton V. Boyarshinov" X-Patchwork-Id: 11408757 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 B20EA14D5 for ; Thu, 27 Feb 2020 14:46:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9AD5F24697 for ; Thu, 27 Feb 2020 14:46:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729471AbgB0Oqi (ORCPT ); Thu, 27 Feb 2020 09:46:38 -0500 Received: from vmicros1.altlinux.org ([194.107.17.57]:59060 "EHLO vmicros1.altlinux.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731828AbgB0Oqh (ORCPT ); Thu, 27 Feb 2020 09:46:37 -0500 Received: from imap.altlinux.org (imap.altlinux.org [194.107.17.38]) by vmicros1.altlinux.org (Postfix) with ESMTP id 98A5172CCF1; Thu, 27 Feb 2020 17:46:35 +0300 (MSK) Received: from boyarsh.office.basealt.ru (unknown [83.220.44.62]) by imap.altlinux.org (Postfix) with ESMTPSA id 7A0314A4A16; Thu, 27 Feb 2020 17:46:35 +0300 (MSK) Date: Thu, 27 Feb 2020 17:46:35 +0300 From: "Anton V. Boyarshinov" To: linux-modules@vger.kernel.org Cc: lucas.de.marchi@gmail.com Subject: [PATCH v3] Add kernel-version dependent configuration directory Message-ID: <20200227174635.5a2b13c9@boyarsh.office.basealt.ru> Organization: BaseALT X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-alt-linux-gnu) MIME-Version: 1.0 Sender: owner-linux-modules@vger.kernel.org Precedence: bulk List-ID: In some cases it looks reasonable to have kernel-version dependent modules configuration: blacklists, options and so on. This commit introduces additional configuration directories: * /lib/modprobe.d/`uname -r` * /etc/modprobe.d/`uname -r` Signed-off-by: Anton V. Boyarshinov --- Changes from v1: ARRAY_SIZE and SYSCONFDIR macros are used Changes from v2: dirname honored libkmod/libkmod-config.c | 5 +---- libkmod/libkmod.c | 42 ++++++++++++++++++++++++++++++++++++---- man/modprobe.d.xml | 2 ++ 3 files changed, 41 insertions(+), 8 deletions(-) diff --git a/libkmod/libkmod-config.c b/libkmod/libkmod-config.c index aaac0a1..5cc348a 100644 --- a/libkmod/libkmod-config.c +++ b/libkmod/libkmod-config.c @@ -711,11 +711,8 @@ static bool conf_files_filter_out(struct kmod_ctx *ctx, DIR *d, fstatat(dirfd(d), fn, &st, 0); - if (S_ISDIR(st.st_mode)) { - ERR(ctx, "Directories inside directories are not supported: " - "%s/%s\n", path, fn); + if (S_ISDIR(st.st_mode)) return true; - } return false; } diff --git a/libkmod/libkmod.c b/libkmod/libkmod.c index 69fe431..51b2e58 100644 --- a/libkmod/libkmod.c +++ b/libkmod/libkmod.c @@ -225,6 +225,19 @@ static char *get_kernel_release(const char *dirname) return p; } +static char *get_ver_config_path(const char * confdir, char * modulesdir) +{ + char *ver_conf; + char * kversion = strrchr(modulesdir, '/'); + if(kversion == NULL) + return NULL; + + if (asprintf(&ver_conf, "%s/modprobe.d/%s", confdir, kversion+1) < 0) + return NULL; + + return ver_conf; +} + /** * kmod_new: * @dirname: what to consider as linux module's directory, if NULL @@ -251,7 +264,7 @@ KMOD_EXPORT struct kmod_ctx *kmod_new(const char *dirname, { const char *env; struct kmod_ctx *ctx; - int err; + int err, configs_count; ctx = calloc(1, sizeof(struct kmod_ctx)); if (!ctx) @@ -269,9 +282,30 @@ KMOD_EXPORT struct kmod_ctx *kmod_new(const char *dirname, if (env != NULL) kmod_set_log_priority(ctx, log_priority(env)); - if (config_paths == NULL) - config_paths = default_config_paths; - err = kmod_config_new(ctx, &ctx->config, config_paths); + if (config_paths == NULL) { + char **tmp_config_paths = malloc(sizeof(default_config_paths) + + sizeof(char *) * 2); + if(tmp_config_paths == NULL) { + ERR(ctx, "could not create versioned config.\n"); + goto fail; + } + + memcpy(tmp_config_paths, default_config_paths, sizeof(default_config_paths)); + + configs_count = ARRAY_SIZE(default_config_paths); + tmp_config_paths[configs_count-1] = get_ver_config_path("/lib", ctx->dirname); + tmp_config_paths[configs_count] = get_ver_config_path(SYSCONFDIR, ctx->dirname); + tmp_config_paths[configs_count+1] = NULL; + + err = kmod_config_new(ctx, &ctx->config, (const char * const*) tmp_config_paths); + + free(tmp_config_paths[configs_count-1]); + free(tmp_config_paths[configs_count]); + free(tmp_config_paths); + } + else + err = kmod_config_new(ctx, &ctx->config, config_paths); + if (err < 0) { ERR(ctx, "could not create config\n"); goto fail; diff --git a/man/modprobe.d.xml b/man/modprobe.d.xml index 211af84..d1e254a 100644 --- a/man/modprobe.d.xml +++ b/man/modprobe.d.xml @@ -41,7 +41,9 @@ /lib/modprobe.d/*.conf + /lib/modprobe.d/`uname -r`/*.conf /etc/modprobe.d/*.conf + /etc/modprobe.d/`uname -r`/*.conf /run/modprobe.d/*.conf