From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Thu, 11 Dec 2025 16:19:06 +0100 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 1vTiRe-00AL1G-1b for lore@lore.pengutronix.de; Thu, 11 Dec 2025 16:19:06 +0100 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 1vTiRd-0002sM-U4 for lore@pengutronix.de; Thu, 11 Dec 2025 16:19:06 +0100 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=Jp85a0M9MS6470mA4K9TDKicRffV5JsB/ETMrIiEtzE=; b=YztpWpLRTlPWIS0EsMJ7oXGexA ePVMrJm7wJu3F6qZYcDhhmWGJsg2TdSUA4ythrE+hl54aWrlfrHlL8ntvnStXgYWToJlhDe4Dsjo8 p4J6yapCrl/OBcCurokz51p8DKekW1LPVINk77Q1g55Y+YqFt3xSqL4CclX3bk9JGWGt8wP4dHNVB 1iYPzLvEiiPPn2fn/ZMT8Ps/3FMBuBWV7stEatO37R+UrRvmS+BkUQPpJEZpnIgcdw/pi9Vp28h34 mKgUz/nbWLoNfHHRc/bRFWqWATXd/sL9RbSV5DMVnHFu9X2HLEsfHCPR53PGxkP7qXCzC4q856HXA Prpm4cgg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vTiR1-0000000GlKc-1Svf; Thu, 11 Dec 2025 15:18:27 +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 1vTiQx-0000000GlJ7-0WN6 for barebox@lists.infradead.org; Thu, 11 Dec 2025 15:18:25 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1vTiQv-0002fg-HI; Thu, 11 Dec 2025 16:18:21 +0100 Received: from dude05.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::54]) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1vTiQv-0059M7-16; Thu, 11 Dec 2025 16:18:21 +0100 Received: from localhost ([::1] helo=dude05.red.stw.pengutronix.de) by dude05.red.stw.pengutronix.de with esmtp (Exim 4.98.2) (envelope-from ) id 1vTiQv-0000000Fe1B-0zsv; Thu, 11 Dec 2025 16:18:21 +0100 From: Ahmad Fatoum To: barebox@lists.infradead.org Cc: Ahmad Fatoum Date: Thu, 11 Dec 2025 16:18:16 +0100 Message-ID: <20251211151820.3726093-3-a.fatoum@pengutronix.de> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251211151820.3726093-1-a.fatoum@pengutronix.de> References: <20251211151820.3726093-1-a.fatoum@pengutronix.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251211_071823_158974_754170C0 X-CRM114-Status: GOOD ( 11.43 ) 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=-4.1 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH 3/3] fs: implement new resolve_fsdevice_path helper 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) For use by the EFI loader, we will want to split off the file path within a device from the device path. As we have no function that generates a path relative to a mountpoint's root, add a function that does this. Signed-off-by: Ahmad Fatoum --- fs/fs.c | 25 +++++++++++++++++++++++++ include/fs.h | 1 + 2 files changed, 26 insertions(+) diff --git a/fs/fs.c b/fs/fs.c index 28378989f91b..77f22d69ea49 100644 --- a/fs/fs.c +++ b/fs/fs.c @@ -2454,6 +2454,31 @@ struct fs_device *get_fsdevice_by_path(int dirfd, const char *pathname) return fsdev; } +struct fs_device *resolve_fsdevice_path(int dirfd, const char *pathname, char **filepath) +{ + struct fs_device *fsdev; + char *res = NULL; + struct path path; + int ret; + + fsdev = get_fsdevice_by_path(dirfd, pathname); + if (!fsdev) + return NULL; + + ret = filename_lookup(dirfd, getname(pathname), LOOKUP_FOLLOW, &path); + if (ret) + goto out; + + res = dpath(path.dentry, fsdev->vfsmount.mnt_root); + if (res) + *filepath = res; + + path_put(&path); +out: + errno_set(ret); + return res ? fsdev : NULL; +} + static int vfs_rmdir(struct inode *dir, struct dentry *dentry) { int error; diff --git a/include/fs.h b/include/fs.h index b9bd14da81a7..9c3c8d95123a 100644 --- a/include/fs.h +++ b/include/fs.h @@ -141,6 +141,7 @@ void cdev_print(const struct cdev *cdev); char *canonicalize_path(int dirfd, const char *pathname); struct fs_device *get_fsdevice_by_path(int dirfd, const char *path); +struct fs_device *resolve_fsdevice_path(int dirfd, const char *pathname, char **filepath); const char *get_mounted_path(const char *path); -- 2.47.3