From patchwork Thu Jul 11 07:48:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Youling Tang X-Patchwork-Id: 13730135 Received: from out-180.mta1.migadu.com (out-180.mta1.migadu.com [95.215.58.180]) (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 EAB13150997; Thu, 11 Jul 2024 07:49:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.180 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720684190; cv=none; b=RI2S8Yw34hD0zmQ8iak4HzHIwj75KO63gjiNILa065aDHUnb/qB163O26txoU2rDwmwGmM3IzUP8oucV3X0mv3LFVFjYGZmHx+L+x+M6v6/Czebk0y+GH7NpAY6+hVUfknFusQ/pLFd5obegVI2gkDiaya8NuGjIEluZsuEpeuQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720684190; c=relaxed/simple; bh=s4t6ohU0MtcRBXarNqAE1eNK8YuDB//6S6YolUZvKX4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=S1pdwiYppUL2mCjRyrtcuv2aZmSTI5wSUAlDbu2hPaxx0Ix0bgqSkXCnLJau8XAwP55jgE2JR9lrjHzB9kwdWmtVjA230N/aaZtsWgODY8Fe+NjM6A7ad4M2DK9BSttrUH2COLg3Y4U0lTs3cu8C4kOR14hgmGPH9ZKVMvY2LBo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=U0rpWiAW; arc=none smtp.client-ip=95.215.58.180 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="U0rpWiAW" X-Envelope-To: viro@zeniv.linux.org.uk DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1720684187; h=from:from:reply-to:subject:subject: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=mvI9A8h/Y5bWS/0nnv7dns2BHflaYgKGDmzquHt/oQs=; b=U0rpWiAWEUzjZS2+HWWLA903HnIPzwMLBJvJWmYhEPS0mPj8TQrwz9ld5INtXG0BqBCWnh Bm7XYNoSGhKEh3/eZHW/CSN7dDFoUMD6y6afKhy7RPuu0QADwODeT9/CRKNdkWUJ7iiBoa m17x3Jq8dEX2SUUzarB0aP2nOxGRAH0= X-Envelope-To: brauner@kernel.org X-Envelope-To: jack@suse.cz X-Envelope-To: clm@fb.com X-Envelope-To: josef@toxicpanda.com X-Envelope-To: dsterba@suse.com X-Envelope-To: tytso@mit.edu X-Envelope-To: adilger.kernel@dilger.ca X-Envelope-To: jaegeuk@kernel.org X-Envelope-To: chao@kernel.org X-Envelope-To: linux-fsdevel@vger.kernel.org X-Envelope-To: linux-btrfs@vger.kernel.org X-Envelope-To: linux-ext4@vger.kernel.org X-Envelope-To: linux-f2fs-devel@lists.sourceforge.net X-Envelope-To: linux-kernel@vger.kernel.org X-Envelope-To: youling.tang@linux.dev X-Envelope-To: tangyouling@kylinos.cn X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Youling Tang To: Alexander Viro , Christian Brauner , Jan Kara , Chris Mason , Josef Bacik , David Sterba , tytso@mit.edu, Andreas Dilger , Jaegeuk Kim , Chao Yu Cc: linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, youling.tang@linux.dev, Youling Tang Subject: [PATCH 3/3] fs: Add {init, exit}_sequence_fs() helper functions Date: Thu, 11 Jul 2024 15:48:59 +0800 Message-Id: <20240711074859.366088-4-youling.tang@linux.dev> In-Reply-To: <20240711074859.366088-1-youling.tang@linux.dev> References: <20240711074859.366088-1-youling.tang@linux.dev> Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT From: Youling Tang In theory init_sequence_fs() and exit_sequence_fs() should match their sequence, thus normally they should look like this: init_sequence_fs() | exit_sequence_fs() -------------------------+------------------------ init_A(); | init_B(); | init_C(); | | exit_C(); | exit_B(); | exit_A(); Providing {init, exit}_sequence_fs() helps functions ensure that modules init/exit match their order, while also simplifying the code. For more details see commit 5565b8e0adcd ("btrfs: make module init/exit match their sequence"). Signed-off-by: Youling Tang --- fs/btrfs/super.c | 36 ++---------------------------------- fs/ext4/super.c | 41 ++--------------------------------------- fs/f2fs/super.c | 36 ++---------------------------------- include/linux/fs.h | 38 ++++++++++++++++++++++++++++++++++++++ 4 files changed, 44 insertions(+), 107 deletions(-) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index f05cce7c8b8d..1101991a9a63 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -2478,13 +2478,6 @@ static void unregister_btrfs(void) unregister_filesystem(&btrfs_fs_type); } -/* Helper structure for long init/exit functions. */ -struct init_sequence { - int (*init_func)(void); - /* Can be NULL if the init_func doesn't need cleanup. */ - void (*exit_func)(void); -}; - static const struct init_sequence mod_init_seq[] = { { .init_func = btrfs_props_init, @@ -2551,40 +2544,15 @@ static const struct init_sequence mod_init_seq[] = { static bool mod_init_result[ARRAY_SIZE(mod_init_seq)]; -static __always_inline void btrfs_exit_btrfs_fs(void) -{ - int i; - - for (i = ARRAY_SIZE(mod_init_seq) - 1; i >= 0; i--) { - if (!mod_init_result[i]) - continue; - if (mod_init_seq[i].exit_func) - mod_init_seq[i].exit_func(); - mod_init_result[i] = false; - } -} - static void __exit exit_btrfs_fs(void) { - btrfs_exit_btrfs_fs(); + exit_sequence_fs(mod_init_seq, mod_init_result, ARRAY_SIZE(mod_init_seq)); btrfs_cleanup_fs_uuids(); } static int __init init_btrfs_fs(void) { - int ret; - int i; - - for (i = 0; i < ARRAY_SIZE(mod_init_seq); i++) { - ASSERT(!mod_init_result[i]); - ret = mod_init_seq[i].init_func(); - if (ret < 0) { - btrfs_exit_btrfs_fs(); - return ret; - } - mod_init_result[i] = true; - } - return 0; + return init_sequence_fs(mod_init_seq, mod_init_result, ARRAY_SIZE(mod_init_seq)); } late_initcall(init_btrfs_fs); diff --git a/fs/ext4/super.c b/fs/ext4/super.c index ec1e63facb10..cb5b7449c80b 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -7328,13 +7328,6 @@ static void unregister_ext(void) unregister_filesystem(&ext4_fs_type); } -/* Helper structure for long init/exit functions. */ -struct init_sequence { - int (*init_func)(void); - /* Can be NULL if the init_func doesn't need cleanup. */ - void (*exit_func)(void); -}; - static const struct init_sequence mod_init_seq[] = { { .init_func = ext4_init_es, @@ -7371,40 +7364,10 @@ static const struct init_sequence mod_init_seq[] = { static bool mod_init_result[ARRAY_SIZE(mod_init_seq)]; -static __always_inline void ext4_exit_ext4_fs(void) -{ - int i; - - for (i = ARRAY_SIZE(mod_init_seq) - 1; i >= 0; i--) { - if (!mod_init_result[i]) - continue; - if (mod_init_seq[i].exit_func) - mod_init_seq[i].exit_func(); - mod_init_result[i] = false; - } -} - static void __exit ext4_exit_fs(void) { ext4_destroy_lazyinit_thread(); - ext4_exit_ext4_fs(); -} - -static __always_inline int ext4_init_ext4_fs(void) -{ - int ret; - int i; - - for (i = 0; i < ARRAY_SIZE(mod_init_seq); i++) { - ASSERT(!mod_init_result[i]); - ret = mod_init_seq[i].init_func(); - if (ret < 0) { - ext4_exit_ext4_fs(); - return ret; - } - mod_init_result[i] = true; - } - return 0; + exit_sequence_fs(mod_init_seq, mod_init_result, ARRAY_SIZE(mod_init_seq)); } /* Shared across all ext4 file systems */ @@ -7421,7 +7384,7 @@ static int __init ext4_init_fs(void) for (int i = 0; i < EXT4_WQ_HASH_SZ; i++) init_waitqueue_head(&ext4__ioend_wq[i]); - return ext4_init_ext4_fs(); + return init_sequence_fs(mod_init_seq, mod_init_result, ARRAY_SIZE(mod_init_seq)); } MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 19509942b837..b4be24865ab3 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -4950,13 +4950,6 @@ static void unregister_f2fs(void) unregister_filesystem(&f2fs_fs_type); } -/* Helper structure for long init/exit functions. */ -struct init_sequence { - int (*init_func)(void); - /* Can be NULL if the init_func doesn't need cleanup. */ - void (*exit_func)(void); -}; - static const struct init_sequence mod_init_seq[] = { { .init_func = init_inodecache, @@ -5017,39 +5010,14 @@ static const struct init_sequence mod_init_seq[] = { static bool mod_init_result[ARRAY_SIZE(mod_init_seq)]; -static __always_inline void f2fs_exit_f2fs_fs(void) -{ - int i; - - for (i = ARRAY_SIZE(mod_init_seq) - 1; i >= 0; i--) { - if (!mod_init_result[i]) - continue; - if (mod_init_seq[i].exit_func) - mod_init_seq[i].exit_func(); - mod_init_result[i] = false; - } -} - static void __exit exit_f2fs_fs(void) { - f2fs_exit_f2fs_fs(); + exit_sequence_fs(mod_init_seq, mod_init_result, ARRAY_SIZE(mod_init_seq)); } static int __init init_f2fs_fs(void) { - int ret; - int i; - - for (i = 0; i < ARRAY_SIZE(mod_init_seq); i++) { - BUG_ON(mod_init_result[i]); - ret = mod_init_seq[i].init_func(); - if (ret < 0) { - f2fs_exit_f2fs_fs(); - return ret; - } - mod_init_result[i] = true; - } - return 0; + return init_sequence_fs(mod_init_seq, mod_init_result, ARRAY_SIZE(mod_init_seq)); } module_init(init_f2fs_fs) diff --git a/include/linux/fs.h b/include/linux/fs.h index 0283cf366c2a..b173194b7f14 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2598,6 +2598,44 @@ extern void iput(struct inode *); int inode_update_timestamps(struct inode *inode, int flags); int generic_update_time(struct inode *, int); +/* Helper structure for long init/exit functions. */ +struct init_sequence { + int (*init_func)(void); + /* Can be NULL if the init_func doesn't need cleanup. */ + void (*exit_func)(void); +}; + +static __always_inline void exit_sequence_fs(const struct init_sequence *mod_init_seq, + bool *mod_init_result, int num) +{ + int i; + + for (i = num - 1; i >= 0; i--) { + if (!mod_init_result[i]) + continue; + if (mod_init_seq[i].exit_func) + mod_init_seq[i].exit_func(); + mod_init_result[i] = false; + } +} + +static __always_inline int init_sequence_fs(const struct init_sequence *mod_init_seq, + bool *mod_init_result, int num) +{ + int ret, i; + + for (i = 0; i < num; i++) { + BUG_ON(mod_init_result[i]); + ret = mod_init_seq[i].init_func(); + if (ret < 0) { + exit_sequence_fs(mod_init_seq, mod_init_result, num); + return ret; + } + mod_init_result[i] = true; + } + return 0; +} + /* /sys/fs */ extern struct kobject *fs_kobj;