From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EFECEC77B7A for ; Wed, 31 May 2023 12:57:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=5w31w+zZv892sZKtN/pHOkwm4iPKfDlNCg76dfsNnU8=; b=LWIr7g3K4/XlLN luGp3l4gNG/rjfY0EWMtQ3g45i8MQL/a2Ex//hs85U7znbaNKEiYTuinEpx8BqmVnaUumkmbJZPDC PkMo3qC8yqJnEmb5roiEHEALmkQEZ/qtW4wKKlweUM8KBchaPFAMJRY+UXoTODrCxHgYbTbaf/KsY 0cTIMNI7GfEzpu4rZdZs0oNOfEstL+q5gNaG3HYdQ65WGicX1PBBKmEO2AiEfEGQlZxk85DIYHbq4 0AOE2Jkkbn8sS4OX8s4fV/F+jB7rNowZMFZv4lYkEOQeHSncGe/5NMUQkeaqHVm7Z0/oN1PT9wXrJ pQT9zxcQmjPT/sVd8Rcg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q4LNe-00HRa6-0h; Wed, 31 May 2023 12:56:46 +0000 Received: from [2001:4bb8:182:6d06:2e49:a56:513a:92ee] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1q4LNb-00HRVg-31; Wed, 31 May 2023 12:56:44 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Greg Kroah-Hartman , "Rafael J. Wysocki" , Mike Snitzer , Joern Engel , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Pavel Machek , Loic Poulain , dm-devel@redhat.com, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-mtd@lists.infradead.org, linux-pm@vger.kernel.org Subject: [PATCH 12/24] init: move the nfs/cifs/ram special cases out of name_to_dev_t Date: Wed, 31 May 2023 14:55:23 +0200 Message-Id: <20230531125535.676098-13-hch@lst.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230531125535.676098-1-hch@lst.de> References: <20230531125535.676098-1-hch@lst.de> MIME-Version: 1.0 X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org The nfs/cifs/ram special case only needs to be parsed once, and only in the boot code. Move them out of name_to_dev_t and into prepare_namespace. Signed-off-by: Christoph Hellwig --- Documentation/admin-guide/kernel-parameters.txt | 7 ++++++- init/do_mounts.c | 14 ++++++-------- 2 files changed, 12 insertions(+), 9 deletions(-) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 9e5bab29685ff0..457c342d15977e 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -5452,7 +5452,12 @@ port and the regular usb controller gets disabled. root= [KNL] Root filesystem - See name_to_dev_t comment in init/do_mounts.c. + Usually this a a block device specifier of some kind, + see the name_to_dev_t comment in init/do_mounts.c for + details. + Alternatively this can be "ram" for the legacy initial + ramdisk, "nfs" and "cifs" for root on a network file + system, or "mtd" and "ubi" for mounting from raw flash. rootdelay= [KNL] Delay (in seconds) to pause before attempting to mount the root filesystem diff --git a/init/do_mounts.c b/init/do_mounts.c index d5c06c1546e82c..86599faf2bf8a1 100644 --- a/init/do_mounts.c +++ b/init/do_mounts.c @@ -248,7 +248,6 @@ static dev_t devt_from_devnum(const char *name) * * 1) device number in hexadecimal represents itself * no leading 0x, for example b302. - * 2) /dev/nfs represents Root_NFS (0xff) * 3) /dev/ represents the device number of disk * 4) /dev/ represents the device number * of partition - device number of disk plus the partition number @@ -266,7 +265,6 @@ static dev_t devt_from_devnum(const char *name) * a colon. * 9) PARTLABEL= with name being the GPT partition label. * MSDOS partitions do not support labels! - * 10) /dev/cifs represents Root_CIFS (0xfe) * * If name doesn't have fall into the categories above, we return (0,0). * block_class is used to check if something is a disk name. If the disk @@ -275,12 +273,6 @@ static dev_t devt_from_devnum(const char *name) */ dev_t name_to_dev_t(const char *name) { - if (strcmp(name, "/dev/nfs") == 0) - return Root_NFS; - if (strcmp(name, "/dev/cifs") == 0) - return Root_CIFS; - if (strcmp(name, "/dev/ram") == 0) - return Root_RAM0; #ifdef CONFIG_BLOCK if (strncmp(name, "PARTUUID=", 9) == 0) return devt_from_partuuid(name + 9); @@ -631,6 +623,12 @@ static dev_t __init parse_root_device(char *root_device_name) if (!strncmp(root_device_name, "mtd", 3) || !strncmp(root_device_name, "ubi", 3)) return Root_Generic; + if (strcmp(root_device_name, "/dev/nfs") == 0) + return Root_NFS; + if (strcmp(root_device_name, "/dev/cifs") == 0) + return Root_CIFS; + if (strcmp(root_device_name, "/dev/ram") == 0) + return Root_RAM0; return name_to_dev_t(root_device_name); } -- 2.39.2 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/