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=-10.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, URIBL_BLOCKED,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 CF7EDC2BA1E for ; Mon, 6 Apr 2020 11:51:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A52B020780 for ; Mon, 6 Apr 2020 11:51:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="ns/JMUsI" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727575AbgDFLve (ORCPT ); Mon, 6 Apr 2020 07:51:34 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:40632 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726329AbgDFLve (ORCPT ); Mon, 6 Apr 2020 07:51:34 -0400 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 036BnHj6027615 for ; Mon, 6 Apr 2020 11:51:32 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : subject : date : message-id : in-reply-to : references; s=corp-2020-01-29; bh=bszKer2+tebRvMuF2lhAhjztr5cP3v/1OBY0PY660F8=; b=ns/JMUsI6FDu5ISrFbA/3P5yiksji5kj0FGZmF8nVcs1+M9+nk8MqV/vvwlIcM2CuBa8 4zkaLIt14BCjoFTRdVitApo9BEehu83eOX0tnaQdK6s2jIQEDBFtfzCVdIr5HsFhQzsU LbJfYkKZF+T3Qa0qRyDAwTjGa8Up4WM+WkQqdzeYiNQ6QwE5RmboV6KjFHKBTVAOx/kr VVSqD7BDc5mKW5C6xxE83ZcNh1fg4ijs9mD5PxFG5v2HI9WwC86BBwdrdo+tlSBOvLQy ahQE498Sf9oAnVR42l+XmH3N4M0JOoM6uRcb5yzN4Tr7WaYLN4FbTvTjx02CcJH86z0/ xg== Received: from userp3030.oracle.com (userp3030.oracle.com [156.151.31.80]) by userp2120.oracle.com with ESMTP id 306jvmx8eb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Mon, 06 Apr 2020 11:51:32 +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 036BlEPo064708 for ; Mon, 6 Apr 2020 11:51:32 GMT Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by userp3030.oracle.com with ESMTP id 3073qcw4tp-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Mon, 06 Apr 2020 11:51:32 +0000 Received: from abhmp0008.oracle.com (abhmp0008.oracle.com [141.146.116.14]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 036BpV94000660 for ; Mon, 6 Apr 2020 11:51:31 GMT Received: from tp.localdomain (/39.109.145.141) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 06 Apr 2020 04:51:31 -0700 From: Anand Jain To: linux-btrfs@vger.kernel.org Subject: [PATCH v7 1/5] btrfs: add btrfs_strmatch helper Date: Mon, 6 Apr 2020 19:51:07 +0800 Message-Id: <1586173871-5559-2-git-send-email-anand.jain@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1586173871-5559-1-git-send-email-anand.jain@oracle.com> References: <1586173871-5559-1-git-send-email-anand.jain@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9582 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 mlxscore=0 mlxlogscore=999 spamscore=0 bulkscore=0 adultscore=0 malwarescore=0 suspectscore=1 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004060104 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9582 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 suspectscore=1 mlxlogscore=999 mlxscore=0 bulkscore=0 adultscore=0 priorityscore=1501 lowpriorityscore=0 clxscore=1015 malwarescore=0 impostorscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004060104 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), -- 2.23.0