From patchwork Tue Jun 23 19:53:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 223113 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.0 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CB555C433DF for ; Tue, 23 Jun 2020 21:32:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9D47A20707 for ; Tue, 23 Jun 2020 21:32:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592947957; bh=aLWt/8UxmqPo2Cj3Qzb8QZkcV8GFh12eDwf4SwQizXI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=LEwSv5zIwqEEWfpqYd5VD6BaO42caRDVQyeJFLmDUXJVvUrQceO9R03QSila0ucsN 0A7KJ43JM3RELegk62oza0MmCeWmU7CkWD2ujFc19TrI2/x+7N8tdc0QJPydnPM4bw R2al9FYqOqoZIIALZRz5i6vWZl8slluJqvgHPb9w= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388952AbgFWUMO (ORCPT ); Tue, 23 Jun 2020 16:12:14 -0400 Received: from mail.kernel.org ([198.145.29.99]:53790 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388456AbgFWUML (ORCPT ); Tue, 23 Jun 2020 16:12:11 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 320DA206C3; Tue, 23 Jun 2020 20:12:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592943130; bh=aLWt/8UxmqPo2Cj3Qzb8QZkcV8GFh12eDwf4SwQizXI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lllSONkkCgY88yeoLI2TTZBEY5OO3cvKnrZMvHnn7I9owfdSrf2PXlUdtvzeax6Rn n+fKzH6Li6fmpCX7phfrjt5vR0Si+Uc3Wf6Bsvjcfre3XjNyPeOs4w/c6PlRppYV+m +pWxat7gfT/HAx9U+ivgA7LL7cZ+zz/pinjqz/co= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Miklos Szeredi , Sasha Levin Subject: [PATCH 5.7 241/477] fuse: fix copy_file_range cache issues Date: Tue, 23 Jun 2020 21:53:58 +0200 Message-Id: <20200623195418.968225015@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200623195407.572062007@linuxfoundation.org> References: <20200623195407.572062007@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Miklos Szeredi [ Upstream commit 2c4656dfd994538176db30ce09c02cc0dfc361ae ] a) Dirty cache needs to be written back not just in the writeback_cache case, since the dirty pages may come from memory maps. b) The fuse_writeback_range() helper takes an inclusive interval, so the end position needs to be pos+len-1 instead of pos+len. Fixes: 88bc7d5097a1 ("fuse: add support for copy_file_range()") Signed-off-by: Miklos Szeredi Signed-off-by: Sasha Levin --- fs/fuse/file.c | 20 ++++++++------------ 1 file changed, 8 insertions(+), 12 deletions(-) diff --git a/fs/fuse/file.c b/fs/fuse/file.c index d400b71b98d55..d58324198b7a7 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -3280,13 +3280,11 @@ static ssize_t __fuse_copy_file_range(struct file *file_in, loff_t pos_in, if (file_inode(file_in)->i_sb != file_inode(file_out)->i_sb) return -EXDEV; - if (fc->writeback_cache) { - inode_lock(inode_in); - err = fuse_writeback_range(inode_in, pos_in, pos_in + len); - inode_unlock(inode_in); - if (err) - return err; - } + inode_lock(inode_in); + err = fuse_writeback_range(inode_in, pos_in, pos_in + len - 1); + inode_unlock(inode_in); + if (err) + return err; inode_lock(inode_out); @@ -3294,11 +3292,9 @@ static ssize_t __fuse_copy_file_range(struct file *file_in, loff_t pos_in, if (err) goto out; - if (fc->writeback_cache) { - err = fuse_writeback_range(inode_out, pos_out, pos_out + len); - if (err) - goto out; - } + err = fuse_writeback_range(inode_out, pos_out, pos_out + len - 1); + if (err) + goto out; if (is_unstable) set_bit(FUSE_I_SIZE_UNSTABLE, &fi_out->state);