From patchwork Sat Feb 12 18:12:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dai Ngo X-Patchwork-Id: 12744376 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EB099C433FE for ; Sat, 12 Feb 2022 18:13:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229509AbiBLSNM (ORCPT ); Sat, 12 Feb 2022 13:13:12 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:32770 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229478AbiBLSNI (ORCPT ); Sat, 12 Feb 2022 13:13:08 -0500 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4B3EC50B2B; Sat, 12 Feb 2022 10:13:03 -0800 (PST) Received: from pps.filterd (m0246617.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 21C9iZCH018836; Sat, 12 Feb 2022 18:13:00 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-2021-07-09; bh=tThgcaiGmTbULAPxqZRjZiOlO/ux403+Gpgm9lIu16c=; b=itEzUN7TD8VlMLrvSGe6RbUBUyUUnRueT/y+NsHatBkAeIai1Aog2Z8ny3OSQgx+++p/ qHgxcK/hzulKXZXTjMZqEea1rDAPYfdFsHjxli16V38iNkkBS5oNriQnmpe5rB6+7p5/ lZwZXSV4hDYPvQ9mLii3K83uXhupr3RLfI8Py49zouLcet7jFV4yQjjsURjLNSt8EwlT 1VfmjepkRWL6dN1neWFG45EgSjGGUuwbPwkAsM6OSmJHXjkRfPN4GW+8bEyXBq+17+Qc 8T+vl+JaGPpE2Qw99tQg+Bpn5E8AJjxaxmayNY6Ye2pnjC6lSU7Lq09CNx+7yvf2LJ9f fQ== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by mx0b-00069f02.pphosted.com with ESMTP id 3e65eu8vqb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 12 Feb 2022 18:13:00 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.1.2/8.16.1.2) with SMTP id 21CIBqLP120392; Sat, 12 Feb 2022 18:12:59 GMT Received: from pps.reinject (localhost [127.0.0.1]) by userp3020.oracle.com with ESMTP id 3e66bj2f5e-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 12 Feb 2022 18:12:59 +0000 Received: from userp3020.oracle.com (userp3020.oracle.com [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 21CICvs1121470; Sat, 12 Feb 2022 18:12:58 GMT Received: from ca-common-hq.us.oracle.com (ca-common-hq.us.oracle.com [10.211.9.209]) by userp3020.oracle.com with ESMTP id 3e66bj2f4u-4; Sat, 12 Feb 2022 18:12:58 +0000 From: Dai Ngo To: chuck.lever@oracle.com, bfields@fieldses.org Cc: jlayton@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH RFC v13 3/4] fs/lock: only call lm_breaker_owns_lease if there is conflict. Date: Sat, 12 Feb 2022 10:12:54 -0800 Message-Id: <1644689575-1235-4-git-send-email-dai.ngo@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1644689575-1235-1-git-send-email-dai.ngo@oracle.com> References: <1644689575-1235-1-git-send-email-dai.ngo@oracle.com> X-Proofpoint-ORIG-GUID: oxTmIk42g6HG4TsWlsTd0fEM3NKkMGdU X-Proofpoint-GUID: oxTmIk42g6HG4TsWlsTd0fEM3NKkMGdU Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Modify leases_conflict to call lm_breaker_owns_lease only if there is real conflict. This is to allow the lock manager to resolve the conflict if possible. Signed-off-by: Dai Ngo --- fs/locks.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/locks.c b/fs/locks.c index 52ede42651df..050acf8b5110 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -1387,9 +1387,6 @@ static bool leases_conflict(struct file_lock *lease, struct file_lock *breaker) { bool rc; - if (lease->fl_lmops->lm_breaker_owns_lease - && lease->fl_lmops->lm_breaker_owns_lease(lease)) - return false; if ((breaker->fl_flags & FL_LAYOUT) != (lease->fl_flags & FL_LAYOUT)) { rc = false; goto trace; @@ -1400,6 +1397,9 @@ static bool leases_conflict(struct file_lock *lease, struct file_lock *breaker) } rc = locks_conflict(breaker, lease); + if (rc && lease->fl_lmops->lm_breaker_owns_lease && + lease->fl_lmops->lm_breaker_owns_lease(lease)) + rc = false; trace: trace_leases_conflict(rc, lease, breaker); return rc;