From patchwork Thu Sep 8 00:26:09 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Roesch X-Patchwork-Id: 12969504 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 2E0A6C6FA82 for ; Thu, 8 Sep 2022 00:26:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229911AbiIHA0r (ORCPT ); Wed, 7 Sep 2022 20:26:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34888 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230119AbiIHA0p (ORCPT ); Wed, 7 Sep 2022 20:26:45 -0400 Received: from mx0a-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3089BD0214 for ; Wed, 7 Sep 2022 17:26:42 -0700 (PDT) Received: from pps.filterd (m0001303.ppops.net [127.0.0.1]) by m0001303.ppops.net (8.17.1.5/8.17.1.5) with ESMTP id 287HnemN015420 for ; Wed, 7 Sep 2022 17:26:41 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=facebook; bh=FP4BKMFtaBlJsT3YkvMH3UxflWSwQVSL2T5ICVjAeuI=; b=hVVGuGhCaWU0MEVjIboUnyHrT8svMtbvkk6d4fqXQfWSaqplgqTuLF7sDy3WV+GB+b/d Gl11c0JFxD3pr9uiHF/08miQOTR3ITvyFOr26SEH9X/eH2+hdk3n72TQg4vImBFWm7hu llhXrx2bpLc2AYK5XSDjzQJUQmAxiyaSUjU= Received: from maileast.thefacebook.com ([163.114.130.16]) by m0001303.ppops.net (PPS) with ESMTPS id 3jevdac9xt-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Wed, 07 Sep 2022 17:26:40 -0700 Received: from twshared6447.05.prn5.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:83::4) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Wed, 7 Sep 2022 17:26:39 -0700 Received: by dev1180.prn1.facebook.com (Postfix, from userid 425415) id C93071D2F03C; Wed, 7 Sep 2022 17:26:19 -0700 (PDT) From: Stefan Roesch To: , , CC: , , , Subject: [PATCH v2 05/12] btrfs: add btrfs_try_lock_ordered_range Date: Wed, 7 Sep 2022 17:26:09 -0700 Message-ID: <20220908002616.3189675-6-shr@fb.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220908002616.3189675-1-shr@fb.com> References: <20220908002616.3189675-1-shr@fb.com> MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-GUID: NrX3bzNndXzDfVBDYKbqJm6MS62JKXfh X-Proofpoint-ORIG-GUID: NrX3bzNndXzDfVBDYKbqJm6MS62JKXfh X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.528,FMLib:17.11.122.1 definitions=2022-09-07_10,2022-09-07_02,2022-06-22_01 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org From: Josef Bacik For IOCB_NOWAIT we're going to want to use try lock on the extent lock, and simply bail if there's an ordered extent in the range because the only choice there is to wait for the ordered extent to complete. Signed-off-by: Josef Bacik Signed-off-by: Stefan Roesch --- fs/btrfs/ordered-data.c | 28 ++++++++++++++++++++++++++++ fs/btrfs/ordered-data.h | 1 + 2 files changed, 29 insertions(+) diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c index 1952ac85222c..3cdfdcedb088 100644 --- a/fs/btrfs/ordered-data.c +++ b/fs/btrfs/ordered-data.c @@ -1041,6 +1041,34 @@ void btrfs_lock_and_flush_ordered_range(struct btrfs_inode *inode, u64 start, } } +/* + * btrfs_try_lock_ordered_range - lock the passed range and ensure all pending + * ordered extents in it are run to completion in nowait mode. + * + * @inode: Inode whose ordered tree is to be searched + * @start: Beginning of range to flush + * @end: Last byte of range to lock + * + * This function returns 1 if btrfs_lock_ordered_range does not return any + * extents, otherwise 0. + */ +int btrfs_try_lock_ordered_range(struct btrfs_inode *inode, u64 start, u64 end) +{ + struct btrfs_ordered_extent *ordered; + + if (!try_lock_extent(&inode->io_tree, start, end)) + return 0; + + ordered = btrfs_lookup_ordered_range(inode, start, end - start + 1); + if (!ordered) + return 1; + + btrfs_put_ordered_extent(ordered); + unlock_extent(&inode->io_tree, start, end); + return 0; +} + + static int clone_ordered_extent(struct btrfs_ordered_extent *ordered, u64 pos, u64 len) { diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h index 87792f85e2c4..ec27ebf0af4b 100644 --- a/fs/btrfs/ordered-data.h +++ b/fs/btrfs/ordered-data.h @@ -218,6 +218,7 @@ void btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, u64 nr, void btrfs_lock_and_flush_ordered_range(struct btrfs_inode *inode, u64 start, u64 end, struct extent_state **cached_state); +int btrfs_try_lock_ordered_range(struct btrfs_inode *inode, u64 start, u64 end); int btrfs_split_ordered_extent(struct btrfs_ordered_extent *ordered, u64 pre, u64 post); int __init ordered_data_init(void);