From patchwork Mon Jan 16 21:21:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mateusz Guzik X-Patchwork-Id: 13103694 X-Patchwork-Delegate: paul@paul-moore.com 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 93C33C46467 for ; Mon, 16 Jan 2023 21:21:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233779AbjAPVVR (ORCPT ); Mon, 16 Jan 2023 16:21:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33006 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232590AbjAPVVQ (ORCPT ); Mon, 16 Jan 2023 16:21:16 -0500 Received: from mail-ej1-x633.google.com (mail-ej1-x633.google.com [IPv6:2a00:1450:4864:20::633]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CEDE623858; Mon, 16 Jan 2023 13:21:15 -0800 (PST) Received: by mail-ej1-x633.google.com with SMTP id v6so27887374ejg.6; Mon, 16 Jan 2023 13:21:15 -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=1ZUr775SZEUdEUVQ50LyInwYmbWVTce14ME9QhXkqM8=; b=EXi/YH/G3S3FVDSqo2MMGTcu9D/1ESejD72sgxsRBtmzrBOrZU5zlWQmckWD2bY+jr FrCHz8y6RUp2GyS49S8LKfpMqLQKjSx25pz3bqFWCrefLFzuOWr5pbDibIyJMqLSgXFq 34SmGJHjFpHi4AA5yMRIyqIcEqTPOm2vHqx/oKv3QjWd73L22NArkdUr5YDSB7mkThtq ISyULCs8LUoeFh24UHcBgZz4D4nAdCK11Olhk68L95Qe6pYyd6QJU95MBrVSReULPPiW 44Y+HmMWRYet6UVRWy2vlhlGuJkfxZ3YTS4tl+zzjrqHmTekATEzm6QOXDWY+TfVa4V/ BW+g== 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=1ZUr775SZEUdEUVQ50LyInwYmbWVTce14ME9QhXkqM8=; b=RO7NF9eWpoxbELFNLxhcK05nbkLm6dzf7Bc0KdLRDgOScT6KRMl9fH+DSYvnP4xcb4 iG58ps4VEcZE4/e2QZILF0k2oBJml3I/60wMaq0E/Q0XKgTBMHuw05rh0/1+cY0IIL/3 Fass/r+7qmF/WblIi2jHlhwmsqzK734b6QRx7mklddbxMdJG7Cek5ktMz838Q//jOQ4l bw8hm43Slul1glyK+PrTA8qTfdnv/x4EILFOh7dByF3gXwgy+6jlNalNtcdTotqoYAEq ico0SAR9qtn53dryLTjrC0EP4zBcEWwf2Hnbrb5rkJUBW3+7zbzi0vOV14ypM0J3XyQ5 7r8g== X-Gm-Message-State: AFqh2krSzOl9rWnGTdEoMxM3xXbzbXadZiexGlHstBYpBy6gMfaXYdyX i00xuWrLRNJooIGnmW5FFVE= X-Google-Smtp-Source: AMrXdXtRA6viwDNQpmAscLu1ZrTmv8E2nfZRNDx6J5yodEg7Yk/dH6aw081jjftiYPC2/kdo95W07w== X-Received: by 2002:a17:907:2bdf:b0:86e:38ae:8713 with SMTP id gv31-20020a1709072bdf00b0086e38ae8713mr431733ejc.51.1673904074355; Mon, 16 Jan 2023 13:21:14 -0800 (PST) Received: from f.. (cst-prg-72-175.cust.vodafone.cz. [46.135.72.175]) by smtp.gmail.com with ESMTPSA id q18-20020a17090676d200b00857c2c29553sm7961721ejn.197.2023.01.16.13.21.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Jan 2023 13:21:13 -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 v2 1/2] capability: add cap_isidentical Date: Mon, 16 Jan 2023 22:21:04 +0100 Message-Id: <20230116212105.1840362-1-mjguzik@gmail.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: 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"