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[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 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1755022594025880139?= X-GMAIL-MSGID: =?utf-8?q?1755022594025880139?= 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"