From patchwork Sat Jan 14 18:02:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mateusz Guzik X-Patchwork-Id: 13102081 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 750FEC6379F for ; Sat, 14 Jan 2023 18:02:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230343AbjANSCp (ORCPT ); Sat, 14 Jan 2023 13:02:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50028 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230231AbjANSCo (ORCPT ); Sat, 14 Jan 2023 13:02:44 -0500 Received: from mail-ed1-x536.google.com (mail-ed1-x536.google.com [IPv6:2a00:1450:4864:20::536]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 89088BBA3; Sat, 14 Jan 2023 10:02:43 -0800 (PST) Received: by mail-ed1-x536.google.com with SMTP id v10so34232897edi.8; Sat, 14 Jan 2023 10:02:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=t6N7J2F7vZrkh1mREUzr3Uhb6M7WIvjgHrSlVsDZzcw=; b=ADIUZhCDGwtjc8id6hSSs006LIW01fTkLA7qDjjWvNb/XOV8bzMbSndCye++Bulk/E M4XvfL2Xl23aCvItGnL/eRYVDX0E1L93zYjB1XMlcBMhwuKjb91SxOPMrxoGs0EbBl8O FL3c1tBUHcdZpmNTFESAWkUgAA096Q9uwMkckxhYiDuQrUmbSSXhGOAtNvGf06fTALIA GJMHHAcitXaux2mWlnrqcdEU9/Dq7yOdZ42S4XzJd/zoVx79kOw84T63GIXAWU7NJ1Q9 v6m0S06ymhRKmMU1MTXgrWHKVacHsBhc5kw/YbFIdU7eYEQJQe+mcdLMwhMcWOTj3ooa fpTQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=t6N7J2F7vZrkh1mREUzr3Uhb6M7WIvjgHrSlVsDZzcw=; b=WXiJKmtm47MFbXtklcGjoqc39zWMwUXHoPDLdLRo3787WzxhxMuUbvfltlgv8FheN6 z+aL0kAszChvx9JJUm/Mr7UUgPPH1HBLp61miL4Ygq4qrCfamhdqSAmH/phhYmr489/C 3r8khWvtKQ3Gv20T9jZ52Dt4H3560QQ/lPKKiSKVQnDRKFqGfJ2rik17X4aQDJzRJdGH n93yAdtblEu0yZY/adz4QBEAbzU3h769vHMK5KopkDj5eektOHfpoiGQ9iAkXvb6QZpz suqdZ9ckHA3oBauXhI3kHBpySWr4kXqUSUor8zj573OjLxXTVLtqF5L5yl4oCa3jzh5P SN0A== X-Gm-Message-State: AFqh2kpjY+8t68D8VvB/JzOCdyAZ6jkpgUeeu9C5Sr5DD81tBRwlgCEW 22nOctwCPVBj0j5TPxHA1U5qrTYcI+YSwg== X-Google-Smtp-Source: AMrXdXt4I50W/aoCUj/+8khUmGwAPDrxlvImYlI3YLhe5z/06Iv/bo4RMdGoLE+iWHrsHTFenLGnXg== X-Received: by 2002:a05:6402:b55:b0:49d:d8ec:cbd3 with SMTP id bx21-20020a0564020b5500b0049dd8eccbd3mr2165859edb.16.1673719362094; Sat, 14 Jan 2023 10:02:42 -0800 (PST) Received: from f.. (cst-prg-72-175.cust.vodafone.cz. [46.135.72.175]) by smtp.gmail.com with ESMTPSA id eg49-20020a05640228b100b00488117821ffsm9623220edb.31.2023.01.14.10.02.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 14 Jan 2023 10:02:41 -0800 (PST) From: Mateusz Guzik To: viro@zeniv.linux.org.uk Cc: serge@hallyn.com, torvalds@linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, Mateusz Guzik Subject: [PATCH 1/2] capability: add cap_isidentical Date: Sat, 14 Jan 2023 19:02:23 +0100 Message-Id: <20230114180224.1777699-1-mjguzik@gmail.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Signed-off-by: Mateusz Guzik Reviewed-by: Serge Hallyn --- include/linux/capability.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/include/linux/capability.h b/include/linux/capability.h index 65efb74c3585..736a973c677a 100644 --- a/include/linux/capability.h +++ b/include/linux/capability.h @@ -156,6 +156,16 @@ static inline bool cap_isclear(const kernel_cap_t a) return true; } +static inline bool cap_isidentical(const kernel_cap_t a, const kernel_cap_t b) +{ + unsigned __capi; + CAP_FOR_EACH_U32(__capi) { + if (a.cap[__capi] != b.cap[__capi]) + return false; + } + return true; +} + /* * Check if "a" is a subset of "set". * return true if ALL of the capabilities in "a" are also in "set"