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 2FE3743AA6 for ; Wed, 15 Nov 2023 20:44:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="wRFznVQf" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6CC23C433C7; Wed, 15 Nov 2023 20:44:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1700081052; bh=t6LAKxfYnfxge0l7MdF9EQLgN+08WJHaC/4X++RmunA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wRFznVQfFWBci9wkxtKSdCFaf7dTAzNH9ytwPAHsNj2lG9IFeEzYa8Yq4aP7H460j 6hfIDgkIWgaP6jJaAV6VVH2K7rzfzM8XT28FW7ZA+hHCGVwULBfDZqmi4b6EnoApuU /oage1ga4LaSS/jKHtoIyCfQWn27V/Xif/jEEuxs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Reuben Hawkins , Amir Goldstein , Christian Brauner , Sasha Levin Subject: [PATCH 4.19 01/88] vfs: fix readahead(2) on block devices Date: Wed, 15 Nov 2023 15:35:13 -0500 Message-ID: <20231115191426.291570066@linuxfoundation.org> X-Mailer: git-send-email 2.42.1 In-Reply-To: <20231115191426.221330369@linuxfoundation.org> References: <20231115191426.221330369@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 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Reuben Hawkins [ Upstream commit 7116c0af4b8414b2f19fdb366eea213cbd9d91c2 ] Readahead was factored to call generic_fadvise. That refactor added an S_ISREG restriction which broke readahead on block devices. In addition to S_ISREG, this change checks S_ISBLK to fix block device readahead. There is no change in behavior with any file type besides block devices in this change. Fixes: 3d8f7615319b ("vfs: implement readahead(2) using POSIX_FADV_WILLNEED") Signed-off-by: Reuben Hawkins Link: https://lore.kernel.org/r/20231003015704.2415-1-reubenhwk@gmail.com Reviewed-by: Amir Goldstein Signed-off-by: Christian Brauner Signed-off-by: Sasha Levin --- mm/readahead.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/readahead.c b/mm/readahead.c index 4e630143a0ba8..96d0f652222a9 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -593,7 +593,8 @@ ssize_t ksys_readahead(int fd, loff_t offset, size_t count) */ ret = -EINVAL; if (!f.file->f_mapping || !f.file->f_mapping->a_ops || - !S_ISREG(file_inode(f.file)->i_mode)) + (!S_ISREG(file_inode(f.file)->i_mode) && + !S_ISBLK(file_inode(f.file)->i_mode))) goto out; ret = vfs_fadvise(f.file, offset, count, POSIX_FADV_WILLNEED); -- 2.42.0