From patchwork Tue Apr 2 10:07:38 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anand Jain X-Patchwork-Id: 10881331 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 620BE1669 for ; Tue, 2 Apr 2019 10:08:02 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4DAAA286DD for ; Tue, 2 Apr 2019 10:08:02 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 41817286E6; Tue, 2 Apr 2019 10:08:02 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EAA84286DD for ; Tue, 2 Apr 2019 10:08:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729813AbfDBKIA (ORCPT ); Tue, 2 Apr 2019 06:08:00 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:45898 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728710AbfDBKIA (ORCPT ); Tue, 2 Apr 2019 06:08:00 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x329hSHx123761 for ; Tue, 2 Apr 2019 10:07:59 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-2018-07-02; bh=p1QpKWpC5/eH1WEcq8+sNoolFCALr1GRilhns7bKSzk=; b=PLxTkbAorNN3nN7Qlm4G4l3dgO0iidtZz5sZoNI6rrRRGWr81LDMKudMhlDJnxhLfn66 YomPKJiFRs7l9k6okfNe9Id50kVR9mMapnCkmH2NfGe3pD2uRElLAOf9JspITBSCteWU wtL6w5OKWbFcdhJSoSSpl87uNumN4JuvdzS0fFOhAE+e2IfUBSzrE374kdmtfeeI+wq1 xXCGIrsfhdDx4J799KhzYQphFqeOi6A1fiEtl1JiKRSFLBfzcix+vD6IXrR/YQHTmTTR gu/gkrypMHHb1iyzy8+ZljTh1VNhzq5od2SwV0nm1FclAsZx/vSodEY3RL/A0tIggG6h ow== Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by userp2120.oracle.com with ESMTP id 2rj13q43qx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 02 Apr 2019 10:07:59 +0000 Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by userv0022.oracle.com (8.14.4/8.14.4) with ESMTP id x32A7wlu007815 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 2 Apr 2019 10:07:59 GMT Received: from abhmp0002.oracle.com (abhmp0002.oracle.com [141.146.116.8]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id x32A7wUR000548 for ; Tue, 2 Apr 2019 10:07:58 GMT Received: from tp.wifi.oracle.com (/192.188.170.106) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 02 Apr 2019 03:07:58 -0700 From: Anand Jain To: linux-btrfs@vger.kernel.org Subject: [PATCH 1/4 RESEND] btrfs: fix zstd compression parameter Date: Tue, 2 Apr 2019 18:07:38 +0800 Message-Id: <20190402100742.8355-2-anand.jain@oracle.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190402100742.8355-1-anand.jain@oracle.com> References: <20190402100742.8355-1-anand.jain@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9214 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1904020070 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP We let to pass zstd compression parameter even if its not fully written. For example: btrfs prop set /btrfs compression zst btrfs prop get /btrfs compression compression=zst zlib and lzo are fine. Fix it by using the expected number of char in strncmp(). Signed-off-by: Anand Jain Reviewed-by: Nikolay Borisov Reviewed-by: David Sterba --- fs/btrfs/props.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/btrfs/props.c b/fs/btrfs/props.c index f1a8be67f639..3cc007e3c7f8 100644 --- a/fs/btrfs/props.c +++ b/fs/btrfs/props.c @@ -304,7 +304,7 @@ static int prop_compression_apply(struct inode *inode, const char *value, btrfs_set_fs_incompat(fs_info, COMPRESS_LZO); } else if (!strncmp("zlib", value, 4)) { type = BTRFS_COMPRESS_ZLIB; - } else if (!strncmp("zstd", value, len)) { + } else if (!strncmp("zstd", value, 4)) { type = BTRFS_COMPRESS_ZSTD; btrfs_set_fs_incompat(fs_info, COMPRESS_ZSTD); } else {