From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Fri, 06 Jun 2025 10:59:10 +0200 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1uNSus-004K6S-0X for lore@lore.pengutronix.de; Fri, 06 Jun 2025 10:59:10 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1uNSun-0003fv-Gy for lore@pengutronix.de; Fri, 06 Jun 2025 10:59:10 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=dhajCjFc2MIUWDhfJg+Bc21FPb3O5w5QrPwLEcRMELg=; b=iTB6l+SzTVUWum2SRRUCPPFuix 5pfz4R7S8+Ymf/UMRWZOimExaFt/38SS1BW/fp4XnK9oJzHSz4pt1cIVkp8qcch7K8yQr5rN3IJIz Zw01tl9Xn5kyavpFVR8cVeO+0yx3pd4LaHeM/WEu4nvYVc0Jlp6NAQyu3sWRYmtpB8x+pdK8LYsDq Np0X+IC0nRUo7VbjtZJkXanbVfQF3EQA61DfGyM+xo/f3lwvIaiu3ElVMAZjMsdrj7SfaplXjt+rw p8L66JRb5A2Dw430qyKlWh8V8t8lmbtGFv8fbp7JbrTIXAHTlBqf9uEOFrDgWGEWlbsVQhAwTuZcu oXoAV38w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uNSu7-0000000HSOe-1odQ; Fri, 06 Jun 2025 08:58:23 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uNSu1-0000000HSKB-1FXM for barebox@lists.infradead.org; Fri, 06 Jun 2025 08:58:19 +0000 Received: from ptz.office.stw.pengutronix.de ([2a0a:edc0:0:900:1d::77] helo=geraet.fritz.box) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1uNSu0-0002si-2J; Fri, 06 Jun 2025 10:58:16 +0200 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: Ahmad Fatoum Date: Fri, 6 Jun 2025 10:58:09 +0200 Message-Id: <20250606085813.2183260-7-a.fatoum@barebox.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250606085813.2183260-1-a.fatoum@barebox.org> References: <20250606085813.2183260-1-a.fatoum@barebox.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250606_015817_331669_B2089AF8 X-CRM114-Status: GOOD ( 14.69 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-5.7 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH 06/10] include: add definitions for UID/GID/DEV X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) We do not care for these fields, but they simplify porting kernel file systems, so add helpers for them. Signed-off-by: Ahmad Fatoum --- include/linux/kdev_t.h | 22 ++++++++++++++ include/linux/uidgid.h | 59 ++++++++++++++++++++++++++++++++++++ include/linux/uidgid_types.h | 15 +++++++++ 3 files changed, 96 insertions(+) create mode 100644 include/linux/kdev_t.h create mode 100644 include/linux/uidgid.h create mode 100644 include/linux/uidgid_types.h diff --git a/include/linux/kdev_t.h b/include/linux/kdev_t.h new file mode 100644 index 000000000000..2919eb6bde82 --- /dev/null +++ b/include/linux/kdev_t.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_KDEV_T_H +#define _LINUX_KDEV_T_H + +#include + +#define MINORBITS 20 +#define MINORMASK ((1U << MINORBITS) - 1) + +#define MAJOR(dev) ((unsigned int) ((dev) >> MINORBITS)) +#define MINOR(dev) ((unsigned int) ((dev) & MINORMASK)) +#define MKDEV(ma,mi) (((ma) << MINORBITS) | (mi)) + +static __always_inline dev_t new_decode_dev(u32 dev) +{ + unsigned major = (dev & 0xfff00) >> 8; + unsigned minor = (dev & 0xff) | ((dev >> 12) & 0xfff00); + return MKDEV(major, minor); +} + + +#endif diff --git a/include/linux/uidgid.h b/include/linux/uidgid.h new file mode 100644 index 000000000000..7589e77b325f --- /dev/null +++ b/include/linux/uidgid.h @@ -0,0 +1,59 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_UIDGID_H +#define _LINUX_UIDGID_H + +/* + * A set of types for the internal kernel types representing uids and gids. + * + * The types defined in this header allow distinguishing which uids and gids in + * the kernel are values used by userspace and which uid and gid values are + * the internal kernel values. With the addition of user namespaces the values + * can be different. Using the type system makes it possible for the compiler + * to detect when we overlook these differences. + * + */ +#include + +#define KUIDT_INIT(value) (kuid_t){ value } +#define KGIDT_INIT(value) (kgid_t){ value } + +#define make_kuid(uid) KUIDT_INIT(uid) +#define make_kgid(gid) KGIDT_INIT(gid) + +#define GLOBAL_ROOT_UID KUIDT_INIT(0) +#define GLOBAL_ROOT_GID KGIDT_INIT(0) + +#define INVALID_UID KUIDT_INIT(-1) +#define INVALID_GID KGIDT_INIT(-1) + +static inline uid_t __kuid_val(kuid_t uid) +{ + return 0; +} + +static inline gid_t __kgid_val(kgid_t gid) +{ + return 0; +} + +static inline uid_t from_kuid(kuid_t kuid) +{ + return __kuid_val(kuid); +} + +static inline gid_t from_kgid(kgid_t kgid) +{ + return __kgid_val(kgid); +} + +static inline bool uid_eq(kuid_t left, kuid_t right) +{ + return __kuid_val(left) == __kuid_val(right); +} + +static inline bool gid_eq(kgid_t left, kgid_t right) +{ + return __kgid_val(left) == __kgid_val(right); +} + +#endif /* _LINUX_UIDGID_H */ diff --git a/include/linux/uidgid_types.h b/include/linux/uidgid_types.h new file mode 100644 index 000000000000..b35ac4955a33 --- /dev/null +++ b/include/linux/uidgid_types.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_UIDGID_TYPES_H +#define _LINUX_UIDGID_TYPES_H + +#include + +typedef struct { + uid_t val; +} kuid_t; + +typedef struct { + gid_t val; +} kgid_t; + +#endif /* _LINUX_UIDGID_TYPES_H */ -- 2.39.5