From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C4078C00307 for ; Fri, 6 Sep 2019 10:33:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9FE1B206CD for ; Fri, 6 Sep 2019 10:33:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="C6Jr4bas" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391963AbfIFKcr (ORCPT ); Fri, 6 Sep 2019 06:32:47 -0400 Received: from mail-vs1-f73.google.com ([209.85.217.73]:48654 "EHLO mail-vs1-f73.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391954AbfIFKcq (ORCPT ); Fri, 6 Sep 2019 06:32:46 -0400 Received: by mail-vs1-f73.google.com with SMTP id h11so653301vsj.15 for ; Fri, 06 Sep 2019 03:32:45 -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=XfkuPAzUg0cWTsSII8UxfvUGODgh66Dt0PdffmfP8ds=; b=C6Jr4basPVZinLvyQuBY/r7Xehq/6fD8Z4AwI7Ou+U4iz1SeaCsIMGK5UzEFoCh3kL 7k+AJ2YSXHXGw7QNTRiJ8ltZGyCQPp9P8eS73HOTuEOJsoR6PNQDV8v2IxULBZN84cHA TXZZKLn19IDXXLcvqMtJnYTMw7fID+m98MyQT7iIlal6isZEfCLfpoaZj/JP7G/aFrvH lRXWpI55ga6IiMMdNLTpvlpvMqZeZvvh9Wx5t87nOEC/zjwrXBzP/G7pdhYaxZqpXc3p qqZw126iKby/JWoA6BWfF8d/YLQxx1rrFDojmSnGcNrzbwONWZ8OoJksM4hdUYlQmUoZ +bUQ== 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=XfkuPAzUg0cWTsSII8UxfvUGODgh66Dt0PdffmfP8ds=; b=do3Fdtpl0fvlEnrDdyks3pFS7h7WqhsgM3yMfPPO2oNHqml0yBEwquYGaGE0cG//E5 qN2q4A8o/ZruP3GvVHLr6FVBeAQtP6DU8HEbr5KJT3sfGVRJUnpKZjOWcnCO6Up1dQmQ givI0MSsbg8OOqIDUXGCgFdQQVtRDfdok+/KtQiPxz0P33CKyXSudGDe2/qB1PPnlrC5 ax/vyxUM4HOqGcbbCxLRChLkT23mtso3Szl3hFakRNA9RH3EgpCWq3/6Xf0eEO3JrQzP ST97PEJ9irpCWKvspSaDJgnDaEX33eUWDJxV/8SZ7OQ+bdy4jYDtS8EfAB1sV9Cc8Rgb k6bQ== X-Gm-Message-State: APjAAAUO/tTlPb2q1GPxJy99Go7qYu2w9SbRpWLw2iNo6yULPlfHQJnO hlZWkYE+KV/o1JMMMSCLcT6AhThT5cIegw== X-Google-Smtp-Source: APXvYqx66gHD+SeaL9xmE31R3KTiX9kgRcczCw8/S2SwjY37EWST9lA0u7geo0wJ4WJyTzo4D12jZ8sHy9W3hA== X-Received: by 2002:a1f:a3d8:: with SMTP id m207mr3707720vke.49.1567765964933; Fri, 06 Sep 2019 03:32:44 -0700 (PDT) Date: Fri, 6 Sep 2019 11:32:25 +0100 In-Reply-To: <20190906103235.197072-1-maennich@google.com> Message-Id: <20190906103235.197072-2-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 01/11] module: support reading multiple values per modinfo tag 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 Content-Type: text/plain; charset="UTF-8" Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Archived-At: List-Archive: List-Post: Similar to modpost's get_next_modinfo(), introduce get_next_modinfo() in kernel/module.c to acquire any further values associated with the same modinfo tag name. That is useful for any tags that have multiple occurrences (such as 'alias'), but is in particular introduced here as part of the symbol namespaces patch series to read the (potentially) multiple namespaces a module is importing. Reviewed-by: Joel Fernandes (Google) Reviewed-by: Martijn Coenen Reviewed-by: Greg Kroah-Hartman Signed-off-by: Matthias Maennich --- kernel/module.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/kernel/module.c b/kernel/module.c index 9ee93421269c..3ee507c0a92f 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -2481,7 +2481,8 @@ static char *next_string(char *string, unsigned long *secsize) return string; } -static char *get_modinfo(struct load_info *info, const char *tag) +static char *get_next_modinfo(const struct load_info *info, const char *tag, + char *prev) { char *p; unsigned int taglen = strlen(tag); @@ -2492,13 +2493,25 @@ static char *get_modinfo(struct load_info *info, const char *tag) * get_modinfo() calls made before rewrite_section_headers() * must use sh_offset, as sh_addr isn't set! */ - for (p = (char *)info->hdr + infosec->sh_offset; p; p = next_string(p, &size)) { + char *modinfo = (char *)info->hdr + infosec->sh_offset; + + if (prev) { + size -= prev - modinfo; + modinfo = next_string(prev, &size); + } + + for (p = modinfo; p; p = next_string(p, &size)) { if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=') return p + taglen + 1; } return NULL; } +static char *get_modinfo(const struct load_info *info, const char *tag) +{ + return get_next_modinfo(info, tag, NULL); +} + static void setup_modinfo(struct module *mod, struct load_info *info) { struct module_attribute *attr; -- 2.23.0.187.g17f5b7556c-goog