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: 101322 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:994d:0:b0:3d9:f83d:47d9 with SMTP id k13csp2769308vqr; Wed, 31 May 2023 03:21:02 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ7krI8P/r0Zu/FDv4jSkM8nS6L75dbV1UjzpiDRrRjHuO/HRs3ZLR3ik+xFHYWFpaqPHLek X-Received: by 2002:a05:6a20:549a:b0:10f:fea:1997 with SMTP id i26-20020a056a20549a00b0010f0fea1997mr6426223pzk.5.1685528462564; Wed, 31 May 2023 03:21:02 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1685528462; cv=none; d=google.com; s=arc-20160816; b=p8yPQr1HMsuzFSLU3/5nNjYb0D5cIgQYCG8a3xN9e+0UZ8ANC1ooWGK7GSxk51EG+o loLSfiQuTFcPIdWeK1stymGeTW47G6f2UhUSZcKPxWalHbs28iGzK2v1yRNejuRt0ZaT b64D20wlhJRYiY0cI2FeG/g2Gu7uP20d4jsYyEHjrJnotKw6DEvhK/p/Rz1siyBpivyb fF1UuwTs/EzEXXTZm8GutfmmynaSmWT++l26PM/Jp2onv6cuEFXxzNRYzT7yFuzhL1ny H3wcCIwJ+gm4YHbrsCKNnfu6HJA2CTja7ZLIgDDadUtxuUO5FvJRpmjZ1WBJiOYVkntj 4srg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=TtT/YiPGcEdmTG9OAN3DQ5AumhKObXT9/Vj+qIl0WEg=; b=VOmcg//aVc504FKMX61TG5KXXpyA7N09DTll+TEmIcx81snwyvDjN9AjMs3ge5YK3K gtDwB4OxeSp89F1vOotnU0ZQwBZuLQxhJOIc0hooJy0Pv11fClLjXEGMOWqOy+412w1F 0JO8Pl582NU4a2E1UyGmgo7Jnj+jwZTgeJwZ7WXwsCHzm1zvqNXVdmY7ulQ7/wVG31C4 S1/SLjbfJoc4RNHzo3JFArUSNPgs52ywdMdOhJCV6zMuGID/2WiOHZgOMlOeIoa4V2vK EAP7seibhu8G85CeICh73jhP3MdsLmM/MEBjnF+erpIdXQouzPlasCzy0b95BFR1oda6 HQrw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linux.dev header.s=key1 header.b=PlSv9IPm; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linux.dev Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id j12-20020a633c0c000000b00534866eb2c2si698901pga.835.2023.05.31.03.20.48; Wed, 31 May 2023 03:21:02 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linux.dev header.s=key1 header.b=PlSv9IPm; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linux.dev Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235233AbjEaJ7S (ORCPT + 99 others); Wed, 31 May 2023 05:59:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54624 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235734AbjEaJ7I (ORCPT ); Wed, 31 May 2023 05:59:08 -0400 Received: from out-47.mta0.migadu.com (out-47.mta0.migadu.com [91.218.175.47]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 907D71B1 for ; Wed, 31 May 2023 02:58:44 -0700 (PDT) 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-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS, T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1767404693013692383?= X-GMAIL-MSGID: =?utf-8?q?1767404693013692383?= 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 *);