From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:45012 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759325AbdLRN0H (ORCPT ); Mon, 18 Dec 2017 08:26:07 -0500 Subject: Patch "target/file: Do not return error for UNMAP if length is zero" has been added to the 4.9-stable tree To: jiangyilism@gmail.com, alexander.levin@verizon.com, gregkh@linuxfoundation.org, nab@linux-iscsi.org Cc: , From: Date: Mon, 18 Dec 2017 14:23:33 +0100 Message-ID: <1513603413375@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled target/file: Do not return error for UNMAP if length is zero to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: target-file-do-not-return-error-for-unmap-if-length-is-zero.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From foo@baz Mon Dec 18 14:12:35 CET 2017 From: Jiang Yi Date: Fri, 11 Aug 2017 11:29:44 +0800 Subject: target/file: Do not return error for UNMAP if length is zero From: Jiang Yi [ Upstream commit 594e25e73440863981032d76c9b1e33409ceff6e ] The function fd_execute_unmap() in target_core_file.c calles ret = file->f_op->fallocate(file, mode, pos, len); Some filesystems implement fallocate() to return error if length is zero (e.g. btrfs) but according to SCSI Block Commands spec UNMAP should return success for zero length. Signed-off-by: Jiang Yi Signed-off-by: Nicholas Bellinger Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/target/target_core_file.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/target/target_core_file.c +++ b/drivers/target/target_core_file.c @@ -466,6 +466,10 @@ fd_execute_unmap(struct se_cmd *cmd, sec struct inode *inode = file->f_mapping->host; int ret; + if (!nolb) { + return 0; + } + if (cmd->se_dev->dev_attrib.pi_prot_type) { ret = fd_do_prot_unmap(cmd, lba, nolb); if (ret) Patches currently in stable-queue which might be from jiangyilism@gmail.com are queue-4.9/target-file-do-not-return-error-for-unmap-if-length-is-zero.patch