From patchwork Wed May 31 09:57:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 13261856 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id BBEB5C77B73 for ; Wed, 31 May 2023 09:58:40 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 5FCAC8E0007; Wed, 31 May 2023 05:58:40 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 5AC338E0002; Wed, 31 May 2023 05:58:40 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 49B228E0007; Wed, 31 May 2023 05:58:40 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 3BF5D8E0002 for ; Wed, 31 May 2023 05:58:40 -0400 (EDT) Received: from smtpin08.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 0F5781202F4 for ; Wed, 31 May 2023 09:58:40 +0000 (UTC) X-FDA: 80850100800.08.2823E9D Received: from out-2.mta0.migadu.com (out-2.mta0.migadu.com [91.218.175.2]) by imf01.hostedemail.com (Postfix) with ESMTP id 572FD40014 for ; Wed, 31 May 2023 09:58:38 +0000 (UTC) Authentication-Results: imf01.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=PlSv9IPm; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf01.hostedemail.com: domain of qi.zheng@linux.dev designates 91.218.175.2 as permitted sender) smtp.mailfrom=qi.zheng@linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1685527118; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=TtT/YiPGcEdmTG9OAN3DQ5AumhKObXT9/Vj+qIl0WEg=; b=MqR63qJ7ggP6YnmtHxkiDLm+gflCe+Il2FETPXfhJJzU9FW5BqlYKFKw+T5P3MLbmhMRwl yb5GMkMSv28BzzlfXAo0zPy3ImZHMHIUzeYJLaZbrKTUj2glmWL+n+C6t+g1I26GEbb+8q 1Jtc6JKbLupk3Ze29OkqyJHqW/aUhCM= ARC-Authentication-Results: i=1; imf01.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=PlSv9IPm; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf01.hostedemail.com: domain of qi.zheng@linux.dev designates 91.218.175.2 as permitted sender) smtp.mailfrom=qi.zheng@linux.dev ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1685527118; a=rsa-sha256; cv=none; b=DBQePM2MkP7XFFOf+0cOLSTeBc9ImSg1nFY7/boltQ0FNjfruuqPzktgNpRNZSP+1FiEwg YN8TYvwnK8CSJyMdFGPx6/g96QFtMDY+G7PLJuhIB/qhU9C8iKrki4zdQzxziMhyxmow+K 1U0Un+E4VpdJH8YZ8y4zXhwqQHrIyYw= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1685527116; 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=TtT/YiPGcEdmTG9OAN3DQ5AumhKObXT9/Vj+qIl0WEg=; b=PlSv9IPmuSHjdrKvEPl7w4TEiIOKkc/t+uD+8kCUMyQjVkWRlPkNzabQJ7hHCOKGaBYK7W bUUNx1CrZkZITlDuz0x6psukNLY7bBJ0k/0MQR2aKvy2s33NxB3JNm4Ms6dXTNpvioEckI QgaCfDLB4ZAFsh5XY9kozVeBEH/jkVw= From: Qi Zheng To: akpm@linux-foundation.org, tkhai@ya.ru, roman.gushchin@linux.dev, vbabka@suse.cz, viro@zeniv.linux.org.uk, brauner@kernel.org, djwong@kernel.org, hughd@google.com, paulmck@kernel.org, muchun.song@linux.dev Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-kernel@vger.kernel.org, Qi Zheng Subject: [PATCH 5/8] fs: introduce struct super_operations::destroy_super() callback Date: Wed, 31 May 2023 09:57:39 +0000 Message-Id: <20230531095742.2480623-6-qi.zheng@linux.dev> In-Reply-To: <20230531095742.2480623-1-qi.zheng@linux.dev> References: <20230531095742.2480623-1-qi.zheng@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Rspamd-Queue-Id: 572FD40014 X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: pxqsu3d7exug6x7mne44ntiescxkd4s1 X-HE-Tag: 1685527118-290201 X-HE-Meta: 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 gsdMpB1p jvZ+r9FM2TpwShTMgy647uaReBXmiUqW2QPmSo4UUbs43GptfhF3YBomUw8st9AnyXMirjpYeMegY+fUf0kbKwq0vYLw3VJ1QcLqzLx4Lc7SiuzlVrsQfeIvjn1mC4xqDsLSFDa+KagfYS/n/asc2AdZ6N8S3wsqQoIZVbhodkSJNPo6bAR+EzuzDjmOgKf0sVCxWVIHdhYXXtcRfEbYP1A/aQuizFIO7iLRKnrqyvjq20p9PR+G8o56WnQ== 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: Kirill Tkhai The patch introduces a new callback, which will be called asynchronous from delayed work. This will allows to make ::nr_cached_objects() safe to be called on destroying superblock in next patches, and to split unregister_shrinker() into two primitives. Signed-off-by: Kirill Tkhai Signed-off-by: Qi Zheng --- fs/super.c | 3 +++ include/linux/fs.h | 1 + 2 files changed, 4 insertions(+) diff --git a/fs/super.c b/fs/super.c index 2ce54561e82e..4e9d08224f86 100644 --- a/fs/super.c +++ b/fs/super.c @@ -170,6 +170,9 @@ static void destroy_super_work(struct work_struct *work) list_lru_destroy(&s->s_dentry_lru); list_lru_destroy(&s->s_inode_lru); + if (s->s_op->destroy_super) + s->s_op->destroy_super(s); + for (i = 0; i < SB_FREEZE_LEVELS; i++) percpu_free_rwsem(&s->s_writers.rw_sem[i]); kfree(s); diff --git a/include/linux/fs.h b/include/linux/fs.h index 0b54ac1d331b..30b46d0facfc 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1910,6 +1910,7 @@ struct super_operations { int (*drop_inode) (struct inode *); void (*evict_inode) (struct inode *); void (*put_super) (struct super_block *); + void (*destroy_super) (struct super_block *); int (*sync_fs)(struct super_block *sb, int wait); int (*freeze_super) (struct super_block *); int (*freeze_fs) (struct super_block *);