From mboxrd@z Thu Jan 1 00:00:00 1970 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 2AA4F1DE4CA; Wed, 6 Nov 2024 12:59:02 +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=1730897943; cv=none; b=O0/HqrPVbbXT9fnSLeSmejX/SdhjnryUsHS5t3pIOlDXV84BFX/zQ39opMZMA56/ctZ83IG+38yYHvFAeSQxHlAYpWLJEYdvBewgS1r2C8A8LLFuYiRbp48fijk440/SwKTx8PBaT6oRAcM9q84QZYIP407s6mZ20STh+s4Oq9g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730897943; c=relaxed/simple; bh=n/QNAnz1FQcSmi93Av0vUlfWIBPTX4ckwWJx6w7Pqzs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XN6mRdHUAu2QC1vTXwbJyi0huQqJygc+bKwAA7iO1Wm4YEFYsRgcZ2dPfnrrYOuxcEfcoOsZh0VyyrQoihK3yBfXpzZ23hpENYVy1DAS6drvPsShgDH71yR8lTVuOLBnrLfekVAWLT6fu75LEPVJyTp74/kwJ8nyB+xeInsfteA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=WBJWK2ah; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="WBJWK2ah" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3451BC4CECD; Wed, 6 Nov 2024 12:59:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1730897942; bh=n/QNAnz1FQcSmi93Av0vUlfWIBPTX4ckwWJx6w7Pqzs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WBJWK2ahrWPmoQuHsVPGwgieVRGo8x3MJ8n/XddE7arxhJuAyF9UDmyiBPCoOU+nR pQU4+2zGnhtlPG0B/JE0tV0QjFsvzGF8qlCLMgm91oH1euWo8dBisIh5d4AkU8NZBi Kq+q32ht1tsnBCo0U3AHMVUM8KreQQicJ8RuYzIA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Christoph Hellwig , Jan Kara , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Andrew Morton , Linus Torvalds , Sasha Levin Subject: [PATCH 5.4 035/462] fs: explicitly unregister per-superblock BDIs Date: Wed, 6 Nov 2024 12:58:48 +0100 Message-ID: <20241106120332.387329940@linuxfoundation.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241106120331.497003148@linuxfoundation.org> References: <20241106120331.497003148@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Christoph Hellwig [ Upstream commit 0b3ea0926afb8dde70cfab00316ae0a70b93a7cc ] Add a new SB_I_ flag to mark superblocks that have an ephemeral bdi associated with them, and unregister it when the superblock is shut down. Link: https://lkml.kernel.org/r/20211021124441.668816-4-hch@lst.de Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Cc: Miquel Raynal Cc: Richard Weinberger Cc: Vignesh Raghavendra Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Stable-dep-of: 4bcda1eaf184 ("mount: handle OOM on mnt_warn_timestamp_expiry") Signed-off-by: Sasha Levin --- 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 47ca7dc0e6c3d..8edf44a2d3dcc 100644 --- a/fs/super.c +++ b/fs/super.c @@ -475,6 +475,8 @@ void generic_shutdown_super(struct super_block *sb) spin_unlock(&sb_lock); up_write(&sb->s_umount); if (sb->s_bdi != &noop_backing_dev_info) { + if (sb->s_iflags & SB_I_PERSB_BDI) + bdi_unregister(sb->s_bdi); bdi_put(sb->s_bdi); sb->s_bdi = &noop_backing_dev_info; } @@ -1622,6 +1624,7 @@ int super_setup_bdi_name(struct super_block *sb, char *fmt, ...) } WARN_ON(sb->s_bdi != &noop_backing_dev_info); sb->s_bdi = bdi; + sb->s_iflags |= SB_I_PERSB_BDI; return 0; } diff --git a/include/linux/fs.h b/include/linux/fs.h index d4f5fcc60744d..b21fdce37c37a 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1407,6 +1407,7 @@ extern int send_sigurg(struct fown_struct *fown); #define SB_I_UNTRUSTED_MOUNTER 0x00000040 #define SB_I_SKIP_SYNC 0x00000100 /* Skip superblock at global sync */ +#define SB_I_PERSB_BDI 0x00000200 /* has a per-sb bdi */ /* Possible states of 'frozen' field */ enum { -- 2.43.0