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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 Authentication-Results: imf19.hostedemail.com; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=OoZipLAP; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=5iyyjB2a; spf=pass (imf19.hostedemail.com: domain of jack@suse.cz designates 195.135.220.29 as permitted sender) smtp.mailfrom=jack@suse.cz; dmarc=none X-Stat-Signature: wmd1cu7jdkqoqg3uoepquhec49gr13b6 X-Rspamd-Queue-Id: 5FA1FB0001A8 X-Rspamd-Server: rspam01 X-HE-Tag: 1626108971-258382 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 *);