From patchwork Wed Jan 31 23:01:45 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 13540165 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AD3AF3D56D; Wed, 31 Jan 2024 23:02:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706742152; cv=none; b=YnMlC8t+VT9eoD01X440v86Fl/NJng6y6E+J5xJAf5BnPYRlt9FG8G5FLNC28hfcOzT09Xu3KXK9Yil9ccP0oxKrLP4DpYztnacfAtDxIE4zw+G4sRO0Wv76v70kUkn49q5N50vvsHA/q4MGy9hqE6yI4QTYBBk0OrrriJpuVic= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706742152; c=relaxed/simple; bh=xt33cafGvSFvt222mAMoOTpMEQG2ghQN1EIR655yJN0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=nx8TxqY07120cXAVISV6idCpwF7itHsQFIh3Zf9V0Bc6CVh6PYoOc0rpabRCQIhz7s4D4UMYeLpMAu5q8dJ+wsqLjaPLlbvZy5DtkG56LyOyChKnAiYDyTprJIyYlaXMln6POI0sVpAaEWF/ohkbusECX5zkhGxM7WX4r0XoxR8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=p0f1OulF; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="p0f1OulF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 82292C43601; Wed, 31 Jan 2024 23:02:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1706742152; bh=xt33cafGvSFvt222mAMoOTpMEQG2ghQN1EIR655yJN0=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=p0f1OulFEEElmyKK0Uv3B9cug7v7Zvq3/Zr1OsgJU58i/PbhRAmS0eYpcNHsgg3ZH 8ewJ9meelgEleUNxIAQHvx9aieyewDZpV/Jr0ydIB08icoKmnqsK+oUSiU4L29hEN1 Sjgs9Ggp5cPk/FhYQNlOSrlFP8lA1O0NxngHb31Flo8CXDm3nguei+lPtazyhDvbmn +hErSf2YcdRUCCfiNa+3zxbg9F85t6Optjh+4aGlwyYMAGe6RzaCT1TQmk5JWPFGDw 9qF1wMJibm+JHs/TQU5+/YHxa46v4yQvGtOv6dyEhD7cmTnItpWEBVX41GYDR8Fq7O hpXn5k/BFtC/A== From: Jeff Layton Date: Wed, 31 Jan 2024 18:01:45 -0500 Subject: [PATCH v3 04/47] filelock: add some new helper functions Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240131-flsplit-v3-4-c6129007ee8d@kernel.org> References: <20240131-flsplit-v3-0-c6129007ee8d@kernel.org> In-Reply-To: <20240131-flsplit-v3-0-c6129007ee8d@kernel.org> To: Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Chuck Lever , Alexander Viro , Christian Brauner , Jan Kara , Eric Van Hensbergen , Latchesar Ionkov , Dominique Martinet , Christian Schoenebeck , David Howells , Marc Dionne , Xiubo Li , Ilya Dryomov , Alexander Aring , David Teigland , Andreas Gruenbacher , Neil Brown , Olga Kornievskaia , Dai Ngo , Tom Talpey , Trond Myklebust , Anna Schumaker , Mark Fasheh , Joel Becker , Joseph Qi , Steve French , Paulo Alcantara , Ronnie Sahlberg , Shyam Prasad N , Namjae Jeon , Sergey Senozhatsky , Miklos Szeredi Cc: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, v9fs@lists.linux.dev, linux-afs@lists.infradead.org, ceph-devel@vger.kernel.org, gfs2@lists.linux.dev, linux-nfs@vger.kernel.org, ocfs2-devel@lists.linux.dev, linux-cifs@vger.kernel.org, Jeff Layton X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=4239; i=jlayton@kernel.org; h=from:subject:message-id; bh=xt33cafGvSFvt222mAMoOTpMEQG2ghQN1EIR655yJN0=; b=owEBbQKS/ZANAwAIAQAOaEEZVoIVAcsmYgBlutFu7pak3ysU7YUEadmffL0cjTzgn6W58PqPi O+VkLJOJleJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCZbrRbgAKCRAADmhBGVaC FTkgEACwR7rQ5JTYFNjlZe0wLt9N7ReG5E7lt9pi+v4QXxMxU6zFDBf65iHA00yAzZxcnlMFdqV b8UtO2fotBzn7i/F1UR5aCknZGuU0AiwEr+6ic0xQrH7VFDPu5JmAxQOCReVedjrrYe+23sOA1X sTvQTBkjy4/tNqdA8dvT82dqlo3wZe8kO/Am61eFX7Fs5z6WPGbmUQGQutIotImyHqHgu5MFE1B Me+Etok0NCCoTA7kKou3TjaK96y916+UtwgKH0YKnkYp/fel2u4RfEOS+m85tFPn4Xk0NrDDubY 50eunzAil4PTazfxa8GEZSGcMW1tVPf+1GMJIWlF0+C7OzDG8GMmEhM1wkSmvKUzn8SYuI+W61V V++GdegN2vVXhdpWAWYrvWnpp2vQZWfWtoYKM507mdQUh4dU0RTwOwBWBo156/dB2UbN6Sx1qE8 fDPJyn54Y8Rfa/IjJQBiLskGVDp1l0ryQOm6UD4gofJ2dnvWuOoJnb/dZivB/7n4qSO4e5pIvRM 3tcKlUS8U9x8ATMiKgTL1NEr5zqh8CNNaOD2A2szZ1TfoP5YLEF7xZb0H1txOLLvZXAUFKOgQJk PVfJV9H5psKLfN4lkqD5C5bii/HfiSCQLOiU+CH0ccSH35x3UBEc1y8v5Ka2IvVtIfLOJdUm6aN omSEWafx298uVwA== X-Developer-Key: i=jlayton@kernel.org; a=openpgp; fpr=4BC0D7B24471B2A184EAF5D3000E684119568215 In later patches we're going to embed some common fields into a new structure inside struct file_lock. Smooth the transition by adding some new helper functions, and converting the core file locking code to use them. Signed-off-by: Jeff Layton Reviewed-by: Jeff Layton --- fs/locks.c | 18 +++++++++--------- include/linux/filelock.h | 23 +++++++++++++++++++++++ 2 files changed, 32 insertions(+), 9 deletions(-) diff --git a/fs/locks.c b/fs/locks.c index 1eceaa56e47f..149070fd3b66 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -674,7 +674,7 @@ static void __locks_wake_up_blocks(struct file_lock *blocker) if (waiter->fl_lmops && waiter->fl_lmops->lm_notify) waiter->fl_lmops->lm_notify(waiter); else - wake_up(&waiter->fl_wait); + locks_wake_up(waiter); /* * The setting of fl_blocker to NULL marks the "done" @@ -841,9 +841,9 @@ locks_delete_lock_ctx(struct file_lock *fl, struct list_head *dispose) static bool locks_conflict(struct file_lock *caller_fl, struct file_lock *sys_fl) { - if (sys_fl->fl_type == F_WRLCK) + if (lock_is_write(sys_fl)) return true; - if (caller_fl->fl_type == F_WRLCK) + if (lock_is_write(caller_fl)) return true; return false; } @@ -874,7 +874,7 @@ static bool posix_test_locks_conflict(struct file_lock *caller_fl, struct file_lock *sys_fl) { /* F_UNLCK checks any locks on the same fd. */ - if (caller_fl->fl_type == F_UNLCK) { + if (lock_is_unlock(caller_fl)) { if (!posix_same_owner(caller_fl, sys_fl)) return false; return locks_overlap(caller_fl, sys_fl); @@ -1055,7 +1055,7 @@ static int flock_lock_inode(struct inode *inode, struct file_lock *request) break; } - if (request->fl_type == F_UNLCK) { + if (lock_is_unlock(request)) { if ((request->fl_flags & FL_EXISTS) && !found) error = -ENOENT; goto out; @@ -1107,7 +1107,7 @@ static int posix_lock_inode(struct inode *inode, struct file_lock *request, ctx = locks_get_lock_context(inode, request->fl_type); if (!ctx) - return (request->fl_type == F_UNLCK) ? 0 : -ENOMEM; + return lock_is_unlock(request) ? 0 : -ENOMEM; /* * We may need two file_lock structures for this operation, @@ -1228,7 +1228,7 @@ static int posix_lock_inode(struct inode *inode, struct file_lock *request, continue; if (fl->fl_start > request->fl_end) break; - if (request->fl_type == F_UNLCK) + if (lock_is_unlock(request)) added = true; if (fl->fl_start < request->fl_start) left = fl; @@ -1279,7 +1279,7 @@ static int posix_lock_inode(struct inode *inode, struct file_lock *request, error = 0; if (!added) { - if (request->fl_type == F_UNLCK) { + if (lock_is_unlock(request)) { if (request->fl_flags & FL_EXISTS) error = -ENOENT; goto out; @@ -1608,7 +1608,7 @@ void lease_get_mtime(struct inode *inode, struct timespec64 *time) spin_lock(&ctx->flc_lock); fl = list_first_entry_or_null(&ctx->flc_lease, struct file_lock, fl_list); - if (fl && (fl->fl_type == F_WRLCK)) + if (fl && lock_is_write(fl)) has_lease = true; spin_unlock(&ctx->flc_lock); } diff --git a/include/linux/filelock.h b/include/linux/filelock.h index 085ff6ba0653..a814664b1053 100644 --- a/include/linux/filelock.h +++ b/include/linux/filelock.h @@ -147,6 +147,29 @@ int fcntl_setlk64(unsigned int, struct file *, unsigned int, int fcntl_setlease(unsigned int fd, struct file *filp, int arg); int fcntl_getlease(struct file *filp); +static inline bool lock_is_unlock(struct file_lock *fl) +{ + return fl->fl_type == F_UNLCK; +} + +static inline bool lock_is_read(struct file_lock *fl) +{ + return fl->fl_type == F_RDLCK; +} + +static inline bool lock_is_write(struct file_lock *fl) +{ + return fl->fl_type == F_WRLCK; +} + +static inline void locks_wake_up(struct file_lock *fl) +{ + wake_up(&fl->fl_wait); +} + +/* for walking lists of file_locks linked by fl_list */ +#define for_each_file_lock(_fl, _head) list_for_each_entry(_fl, _head, fl_list) + /* fs/locks.c */ void locks_free_lock_context(struct inode *inode); void locks_free_lock(struct file_lock *fl);