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 X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A0E01C31E49 for ; Wed, 19 Jun 2019 12:30:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 81C0F208CB for ; Wed, 19 Jun 2019 12:30:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731867AbfFSMaj (ORCPT ); Wed, 19 Jun 2019 08:30:39 -0400 Received: from mail-wr1-f68.google.com ([209.85.221.68]:43963 "EHLO mail-wr1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731845AbfFSMah (ORCPT ); Wed, 19 Jun 2019 08:30:37 -0400 Received: by mail-wr1-f68.google.com with SMTP id p13so3168102wru.10 for ; Wed, 19 Jun 2019 05:30:35 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=aEJZvAaP0gZ3BGwiRkcb3jZB35A1QSUJKdWyF6hsB/4=; b=HS8Nfe5cXr3Pf7qQFn0lT6K9pVlvHDMTQWKWhx5sffNVYl9qAEAcrg1ngyXp3XqsuE fGqj9Kv/TU9FvvhBgkW4oMeB5Q3l9QQW4/Wl89D+dKtCXLs53PXNlExAXDNGudRJkGJw jqG1357pyG0+OMdJ9IwCs5tlU4Aihu7Dfs+UOS+YVrA1PQ10+BGoFTnvdZUHOXHmYwn3 8dNf/sS8bnaPmwZyTH1fK0QDBJhVVTB20/v4izxhdrndcGIN+hxKc6OPEplHfmJ9evML A6EhP4ZaBcTn0tCrenUY9gyRkQPA+geOqY7NnX0Xy//hBVabnHoaryFNfWk4FzIVwaLH T+GA== X-Gm-Message-State: APjAAAV1j6uzv32Ko9dk70Mltg+Exw13V7M4UjManU4JxfBBu/9oWZty S1IaXIOi6yF5Oz/4jkRsG03tGQ== X-Google-Smtp-Source: APXvYqx+pORYHinPI1RPJLOFGKWiPjDYT7ZAsQ/FYO/zLto8APQKogtIGI+TjNYrCayP0MLlUNfRAg== X-Received: by 2002:adf:fc85:: with SMTP id g5mr86528327wrr.324.1560947435212; Wed, 19 Jun 2019 05:30:35 -0700 (PDT) Received: from miu.piliscsaba.redhat.com (catv-212-96-48-140.catv.broadband.hu. [212.96.48.140]) by smtp.gmail.com with ESMTPSA id 11sm1837513wmd.23.2019.06.19.05.30.33 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Wed, 19 Jun 2019 05:30:33 -0700 (PDT) From: Miklos Szeredi To: David Howells Cc: Al Viro , Ian Kent , linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 06/13] vfs: new helper: vfs_parse_ro_rw() Date: Wed, 19 Jun 2019 14:30:12 +0200 Message-Id: <20190619123019.30032-6-mszeredi@redhat.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190619123019.30032-1-mszeredi@redhat.com> References: <20190619123019.30032-1-mszeredi@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This just parses the "ro" and "rw" options and sets sb_flags accordingly. Signed-off-by: Miklos Szeredi --- fs/fs_context.c | 18 ++++++++++++++++++ include/linux/fs_context.h | 1 + 2 files changed, 19 insertions(+) diff --git a/fs/fs_context.c b/fs/fs_context.c index c26b353aa858..5012ab7650ec 100644 --- a/fs/fs_context.c +++ b/fs/fs_context.c @@ -77,6 +77,24 @@ int vfs_parse_sb_flag(struct fs_context *fc, struct fs_parameter *param) } EXPORT_SYMBOL(vfs_parse_sb_flag); +int vfs_parse_ro_rw(struct fs_context *fc, struct fs_parameter *param) +{ + if (strcmp(param->key, "ro") == 0) + fc->sb_flags |= SB_RDONLY; + else if (strcmp(param->key, "rw") == 0) + fc->sb_flags &= ~SB_RDONLY; + else + return -ENOPARAM; + + if (param->type != fs_value_is_flag) + return invalf(fc, "%s: Unexpected value for '%s'", + fc->fs_type->name, param->key); + + fc->sb_flags_mask |= SB_RDONLY; + return 0; +} +EXPORT_SYMBOL(vfs_parse_ro_rw); + /** * vfs_parse_fs_param - Add a single parameter to a superblock config * @fc: The filesystem context to modify diff --git a/include/linux/fs_context.h b/include/linux/fs_context.h index 39f4d8b0a390..bff6796a89ef 100644 --- a/include/linux/fs_context.h +++ b/include/linux/fs_context.h @@ -128,6 +128,7 @@ extern struct fs_context *fs_context_for_submount(struct file_system_type *fs_ty extern struct fs_context *vfs_dup_fs_context(struct fs_context *fc); extern int vfs_parse_sb_flag(struct fs_context *fc, struct fs_parameter *param); +extern int vfs_parse_ro_rw(struct fs_context *fc, struct fs_parameter *param); extern int vfs_parse_fs_param(struct fs_context *fc, struct fs_parameter *param); extern int vfs_parse_fs_string(struct fs_context *fc, const char *key, const char *value, size_t v_size); -- 2.21.0