From patchwork Wed Feb 19 11:29:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anand Jain X-Patchwork-Id: 11391273 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 58BC91580 for ; Wed, 19 Feb 2020 11:31:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3940F24658 for ; Wed, 19 Feb 2020 11:31:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="HGO/oXhp" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726788AbgBSLbo (ORCPT ); Wed, 19 Feb 2020 06:31:44 -0500 Received: from userp2120.oracle.com ([156.151.31.85]:56478 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726270AbgBSLbo (ORCPT ); Wed, 19 Feb 2020 06:31:44 -0500 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 01JBS1sD129657; Wed, 19 Feb 2020 11:31:40 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=corp-2020-01-29; bh=1ZBrgt24O1C4pCqHd+Y/7lmncxgO+I82LUgkjMMen9g=; b=HGO/oXhphHg95E/qm2N5xT2bT2/9sCxauyBKYqZIh4GkusBOuAkECGqF2K1LuKVybq7j 8qAXHfE3DDT+wmelOWNuesrRCDUBhABsM7SxwBEQxClAk7EQ8sJmfJWtzvflUQNkIxhU Xo6IWsXprtsU3Yj+5vQ78PBbILVeZEpKu7j5lNe9N+ekJ5LMOl3vLvKV7g4q994BDLG/ y7FfvDQ74gXKs/0GqWz0X/gpjWAGZn8NkkHnnRm/B78rr6XQnZMVA2hv0VATF2v4HpNU c+OcrTWVpv5lS9vBsKUqe+Z91mithDY3Y2cZ0R9bYVgcA+VRE9aK4CMVwtb+kckF2XDf HA== Received: from userp3030.oracle.com (userp3030.oracle.com [156.151.31.80]) by userp2120.oracle.com with ESMTP id 2y8ud12cjm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 19 Feb 2020 11:31:40 +0000 Received: from pps.filterd (userp3030.oracle.com [127.0.0.1]) by userp3030.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 01JBRsoI117905; Wed, 19 Feb 2020 11:29:39 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userp3030.oracle.com with ESMTP id 2y8ud30afx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 19 Feb 2020 11:29:39 +0000 Received: from abhmp0007.oracle.com (abhmp0007.oracle.com [141.146.116.13]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 01JBTd5O006530; Wed, 19 Feb 2020 11:29:39 GMT Received: from tp.localdomain (/39.109.145.141) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 19 Feb 2020 03:29:38 -0800 From: Anand Jain To: linux-btrfs@vger.kernel.org Cc: josef@toxicpanda.com, dsterba@suse.cz Subject: [PATCH v6 1/5] btrfs: add btrfs_strmatch helper Date: Wed, 19 Feb 2020 19:29:22 +0800 Message-Id: <1582111766-8372-2-git-send-email-anand.jain@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1582111766-8372-1-git-send-email-anand.jain@oracle.com> References: <1582111766-8372-1-git-send-email-anand.jain@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9535 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 mlxlogscore=999 mlxscore=0 adultscore=0 spamscore=0 suspectscore=1 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002190087 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9535 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 lowpriorityscore=0 malwarescore=0 suspectscore=1 bulkscore=0 spamscore=0 priorityscore=1501 phishscore=0 impostorscore=0 mlxlogscore=999 clxscore=1015 adultscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002190087 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Add a generic helper to match the golden-string in the given-string, and ignore the leading and trailing whitespaces if any. Signed-off-by: Anand Jain Suggested-by: David Sterba --- v5: born fs/btrfs/sysfs.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index 93cf76118a04..7bb68cef98ab 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -809,6 +809,29 @@ static ssize_t btrfs_checksum_show(struct kobject *kobj, BTRFS_ATTR(, checksum, btrfs_checksum_show); +/* + * Match the %golden in the %given. Ignore the leading and trailing whitespaces + * if any. + */ +static int btrfs_strmatch(const char *given, const char *golden) +{ + size_t len = strlen(golden); + char *stripped; + + /* strip leading whitespace */ + stripped = skip_spaces(given); + + if (strncmp(stripped, golden, len) == 0) { + /* strip trailing whitespace */ + if (strlen(skip_spaces(stripped + len))) + return -EINVAL; + + return 0; + } + + return -EINVAL; +} + static const struct attribute *btrfs_attrs[] = { BTRFS_ATTR_PTR(, label), BTRFS_ATTR_PTR(, nodesize),