From patchwork Tue Jan 30 21:48:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bart Van Assche X-Patchwork-Id: 13538138 Received: from mail-pg1-f179.google.com (mail-pg1-f179.google.com [209.85.215.179]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 686DB38DDA; Tue, 30 Jan 2024 21:49:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.179 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706651379; cv=none; b=Sb5LjrEYg+KB9pvY07MwuQn8qG1a5gWxff02XU4Da2jMpKfysLJMu/7Xe/x+5+/xuJujc2X0zzRzW0FsR9aMAcyLDZW3+mvvUAsQbDCl+1Kq+pEnSj/9pDESISkhXW6LBjQ4AokkddH8Z/DSoM24//z7e50zGxRwmSr+ue7qnZs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706651379; c=relaxed/simple; bh=CxuIjzAuFPsuQ2mGh2GtZYv3uzrTRgT4sTYAH4YjEGE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kShbQ1l8vyqAr8wffKeSDBFcw7G2VaEcdsXjoNArsEsvLiOj+8Ss+ebkS3nwOP5abBiqDWT18RfER78fb99fITFsslLL+7Z2a4hWeZDiuBDSYe1Alb0wEUc4UIcKaGzH0cE5/YOgjeWzpjn9l2RE1IxnkBL8ZpUNuEri5Q0jub0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=acm.org; spf=pass smtp.mailfrom=gmail.com; arc=none smtp.client-ip=209.85.215.179 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=acm.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-pg1-f179.google.com with SMTP id 41be03b00d2f7-5ce2aada130so2533940a12.1; Tue, 30 Jan 2024 13:49:38 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1706651378; x=1707256178; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=7QD+F7yRBzRHQujQndodnozYpP+7wyWwo1I/tKuhJ6A=; b=Hx/EPH3zZjMRe1opCvmk6WEsUp+M7U68vmeL5ddOFD+DJrgDibg0VgUOUN1b51YgGb 7v9AKVbeARPA08DE2BC0jI/IkYEUvIeTwJdpka22IpJrFtTDMVhTNdqvSMzBKY+z37Xb ug0oDhw1B2knvGsL4mbfnwGqPpo/SkA+sg15RxmuxFeLKSneLGMgPn0cJDxvSwX7J8zu 0D/39vpwFWvu192YeR6zHv01AsZPBem1i2sXBLEPwmzNFnKMShiln9fgRz3N/DlR2V51 mScoF5T5r/wcy5Lt4K8tLFxpeQjK8N7e8TKTLkQ5vTzuZKZtr1Px38rHznXVAhlkH1mW kZxA== X-Gm-Message-State: AOJu0Yy8YKR9Rcx+it87YBjFOtre47/jO3b3gm8vCyHQ2b4C7U7Kx3Lm PQTDPLP7U2mkOuj1L+gxBk+LnVhkM1K1bzAzJ/nzPspOY9vVXCKH X-Google-Smtp-Source: AGHT+IH4gURjDL3Z5G5a/OCKtiv576sRPTtWCKl2beurVCfH8bZo2s0WAt98mCZO/b2/E670qCNSxQ== X-Received: by 2002:a05:6a20:b28:b0:19c:2fb5:973f with SMTP id x40-20020a056a200b2800b0019c2fb5973fmr486899pzf.23.1706651377723; Tue, 30 Jan 2024 13:49:37 -0800 (PST) Received: from bvanassche-linux.mtv.corp.google.com ([2620:0:1000:8411:f45c:fd18:bfa0:e084]) by smtp.gmail.com with ESMTPSA id k14-20020aa7998e000000b006db87354a8fsm8285597pfh.119.2024.01.30.13.49.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 Jan 2024 13:49:37 -0800 (PST) From: Bart Van Assche To: "Martin K . Petersen" Cc: linux-scsi@vger.kernel.org, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, Jens Axboe , Christoph Hellwig , Daejun Park , Kanchan Joshi , Bart Van Assche , Alexander Viro , Christian Brauner , Jeff Layton , Chuck Lever Subject: [PATCH v9 05/19] fs: Propagate write hints to the struct block_device inode Date: Tue, 30 Jan 2024 13:48:31 -0800 Message-ID: <20240130214911.1863909-6-bvanassche@acm.org> X-Mailer: git-send-email 2.43.0.429.g432eaa2c6b-goog In-Reply-To: <20240130214911.1863909-1-bvanassche@acm.org> References: <20240130214911.1863909-1-bvanassche@acm.org> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Write hints applied with F_SET_RW_HINT on a block device affect the block device inode only. Propagate these hints to the inode associated with struct block_device because that is the inode used when writing back dirty pages. Cc: Alexander Viro Cc: Christian Brauner Cc: Jens Axboe Cc: Christoph Hellwig Cc: Jeff Layton Cc: Chuck Lever Signed-off-by: Bart Van Assche Reviewed-by: Kanchan Joshi --- fs/fcntl.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/fs/fcntl.c b/fs/fcntl.c index fc73c5fae43c..cfb52c3a4577 100644 --- a/fs/fcntl.c +++ b/fs/fcntl.c @@ -319,6 +319,17 @@ static long fcntl_set_rw_hint(struct file *file, unsigned int cmd, inode->i_write_hint = hint; inode_unlock(inode); + /* + * file->f_mapping->host may differ from inode. As an example, + * blkdev_open() modifies file->f_mapping. + */ + if (file->f_mapping->host != inode) { + inode = file->f_mapping->host; + inode_lock(inode); + inode->i_write_hint = hint; + inode_unlock(inode); + } + return 0; }