From patchwork Mon Jul 12 16:55:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Kara X-Patchwork-Id: 12371673 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 6A51CC11F9F for ; Mon, 12 Jul 2021 16:56:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 59999610FA for ; Mon, 12 Jul 2021 16:56:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235713AbhGLQ7X (ORCPT ); Mon, 12 Jul 2021 12:59:23 -0400 Received: from smtp-out2.suse.de ([195.135.220.29]:54432 "EHLO smtp-out2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234507AbhGLQ7B (ORCPT ); Mon, 12 Jul 2021 12:59:01 -0400 Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out2.suse.de (Postfix) with ESMTP id 3994D1FFD5; Mon, 12 Jul 2021 16:56:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1626108970; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=3UrWJRrmmZoeFsiXlatgXAwopNmimQ93wkzrLwvaNN0=; b=OoZipLAProXeUQwlzamKj0otwgyhRsb3O/pcugRpO8Ybwg1pbYzMK4x9w9LV0dmRyohoo/ O083EpZsARaFYJ0N5/MzyEadqP0WiPrBtsJCD813PKcPt/pV8cMylSLMJuzupgbb19vYQj ABq70ngOyN39fG6CWj32dHOt7fxUHDA= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1626108970; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=3UrWJRrmmZoeFsiXlatgXAwopNmimQ93wkzrLwvaNN0=; b=5iyyjB2aesPiOfQ9Kj3UZPS+jdt80S0tnRRb1Hx/M1h/B/iT6eo6l+1KByw1UAcD/GM/3o 56s5F3yalT9KrkBg== Received: from quack2.suse.cz (unknown [10.100.224.230]) by relay2.suse.de (Postfix) with ESMTP id 1EDBBA3B91; Mon, 12 Jul 2021 16:56:10 +0000 (UTC) Received: by quack2.suse.cz (Postfix, from userid 1000) id CDC2A1F2CD7; Mon, 12 Jul 2021 18:56:09 +0200 (CEST) From: Jan Kara To: Cc: , Christoph Hellwig , "Darrick J. Wong" , Ted Tso , Dave Chinner , Matthew Wilcox , , , linux-f2fs-devel@lists.sourceforge.net, linux-cifs@vger.kernel.org, ceph-devel@vger.kernel.org, Pavel Reichl , Dave Chinner , Eric Sandeen , "Darrick J . Wong" , Christoph Hellwig , Jan Kara Subject: [PATCH 07/14] xfs: Refactor xfs_isilocked() Date: Mon, 12 Jul 2021 18:55:58 +0200 Message-Id: <20210712165609.13215-7-jack@suse.cz> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210712163901.29514-1-jack@suse.cz> References: <20210712163901.29514-1-jack@suse.cz> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2663; i=jack@suse.cz; h=from:subject; bh=YmQSkQse9NO9b0qrNLfWFR/SLfIwnVnRgr/nYQ5R0lY=; b=owEBbQGS/pANAwAIAZydqgc/ZEDZAcsmYgBg7HQehJIq6dexPtRN0mRaJPDIgpTC8p8HxaHKF5yv BEL61CyJATMEAAEIAB0WIQSrWdEr1p4yirVVKBycnaoHP2RA2QUCYOx0HgAKCRCcnaoHP2RA2aZ0CA DmMkxbR9qLrsukw83nRMmafvnSx1UgV9wddqFCwl3MYM26n9QK2HkjOUv/5lXjER/+Xc7hwqxRJJK3 QW4giqCDesV3ACAsWDxpJzexMo/UAc9evJHeXzBhZYgTvZaWh63FTCn6WqNJuqqVFydnvmFPUmVz7d 0gc9RfNrf0waBvGaKbsk4ANoIme0JNxUeSNt5jEK7bLjasw0NCR1yQwlNlBgs4ldvO4nm+DfPRhP5/ sBA74EnrGzVeVg9JHNKccZUK3uoM6JJoN1H+OCbhiKDkf7USnKdBFWKv9/x68yB0JVkbDiNO3QAywj 9TXMbtQNtgT3RKU9LX7xy29shO9zEP X-Developer-Key: i=jack@suse.cz; a=openpgp; fpr=93C6099A142276A28BBE35D815BC833443038D8C Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org From: Pavel Reichl Introduce a new __xfs_rwsem_islocked predicate to encapsulate checking the state of a rw_semaphore, then refactor xfs_isilocked to use it. Signed-off-by: Pavel Reichl Suggested-by: Dave Chinner Suggested-by: Eric Sandeen Suggested-by: Darrick J. Wong Reviewed-by: Christoph Hellwig Reviewed-by: Darrick J. Wong Signed-off-by: Jan Kara --- fs/xfs/xfs_inode.c | 34 ++++++++++++++++++++++++++-------- fs/xfs/xfs_inode.h | 2 +- 2 files changed, 27 insertions(+), 9 deletions(-) diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index a835ceb79ba5..359e2cd44ad7 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -343,9 +343,29 @@ xfs_ilock_demote( } #if defined(DEBUG) || defined(XFS_WARN) -int +static inline bool +__xfs_rwsem_islocked( + struct rw_semaphore *rwsem, + bool shared) +{ + if (!debug_locks) + return rwsem_is_locked(rwsem); + + if (!shared) + return lockdep_is_held_type(rwsem, 0); + + /* + * We are checking that the lock is held at least in shared + * mode but don't care that it might be held exclusively + * (i.e. shared | excl). Hence we check if the lock is held + * in any mode rather than an explicit shared mode. + */ + return lockdep_is_held_type(rwsem, -1); +} + +bool xfs_isilocked( - xfs_inode_t *ip, + struct xfs_inode *ip, uint lock_flags) { if (lock_flags & (XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)) { @@ -360,15 +380,13 @@ xfs_isilocked( return rwsem_is_locked(&ip->i_mmaplock.mr_lock); } - if (lock_flags & (XFS_IOLOCK_EXCL|XFS_IOLOCK_SHARED)) { - if (!(lock_flags & XFS_IOLOCK_SHARED)) - return !debug_locks || - lockdep_is_held_type(&VFS_I(ip)->i_rwsem, 0); - return rwsem_is_locked(&VFS_I(ip)->i_rwsem); + if (lock_flags & (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED)) { + return __xfs_rwsem_islocked(&VFS_I(ip)->i_rwsem, + (lock_flags & XFS_IOLOCK_SHARED)); } ASSERT(0); - return 0; + return false; } #endif diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index 4b6703dbffb8..4b5202ae8ebb 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -410,7 +410,7 @@ void xfs_ilock(xfs_inode_t *, uint); int xfs_ilock_nowait(xfs_inode_t *, uint); void xfs_iunlock(xfs_inode_t *, uint); void xfs_ilock_demote(xfs_inode_t *, uint); -int xfs_isilocked(xfs_inode_t *, uint); +bool xfs_isilocked(struct xfs_inode *, uint); uint xfs_ilock_data_map_shared(struct xfs_inode *); uint xfs_ilock_attr_map_shared(struct xfs_inode *);