From patchwork Thu Jun 17 22:11:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kristian Klausen X-Patchwork-Id: 12329645 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=-23.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham 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 9C1A8C2B9F4 for ; Thu, 17 Jun 2021 22:12:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6ACDC61375 for ; Thu, 17 Jun 2021 22:12:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231239AbhFQWO3 (ORCPT ); Thu, 17 Jun 2021 18:14:29 -0400 Received: from mail.klausen.dk ([157.90.24.29]:51186 "EHLO mail.klausen.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229915AbhFQWO2 (ORCPT ); Thu, 17 Jun 2021 18:14:28 -0400 From: Kristian Klausen DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=klausen.dk; s=dkim; t=1623967938; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=Q7RbCKgSk5h1jem9dXNZ5yqfit5y4sv6R9H/UHSF8xg=; b=18dAxXYSeh3O6HtlKbvDbc35tXLIHZCBiVTqkScX+7q5NKHJdIijAy8GnBMMGR1TIcPYSv HKyn6VJeqFrNPy3WmpjeYQmueaLiwXhxTO7GJY1ofEAjSK4pOEsY1oBiwrbCZexKYhSQmJ 1WA2QzQKBxTgtuGxi5E/yqxt8WU/404= To: linux-block@vger.kernel.org Cc: Kristian Klausen , stable@vger.kernel.org, Jens Axboe , Martijn Coenen , linux-kernel@vger.kernel.org (open list) Subject: [PATCH] loop: Fix missing discard support when using LOOP_CONFIGURE Date: Fri, 18 Jun 2021 00:11:57 +0200 Message-Id: <20210617221158.7045-1-kristian@klausen.dk> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Cc: # 5.8.x- Fixes: 3448914e8cc5 ("loop: Add LOOP_CONFIGURE ioctl") Signed-off-by: Kristian Klausen --- Tested like so (without the patch): losetup 2.37<= uses LOOP_CONFIGURE instead of LOOP_SET_STATUS64[1] # fallocate -l100M disk.img # rmmod loop # losetup --version losetup from util-linux 2.36.2 # losetup --find --show disk.img /dev/loop0 # grep '' /sys/devices/virtual/block/loop0/queue/*discard* /sys/devices/virtual/block/loop0/queue/discard_granularity:4096 /sys/devices/virtual/block/loop0/queue/discard_max_bytes:4294966784 /sys/devices/virtual/block/loop0/queue/discard_max_hw_bytes:4294966784 /sys/devices/virtual/block/loop0/queue/discard_zeroes_data:0 /sys/devices/virtual/block/loop0/queue/max_discard_segments:1 # losetup -d /dev/loop0 # [update util-linux] # losetup --version losetup from util-linux 2.37 # rmmod loop # losetup --find --show disk.img /dev/loop0 # grep '' /sys/devices/virtual/block/loop0/queue/*discard* /sys/devices/virtual/block/loop0/queue/discard_granularity:0 /sys/devices/virtual/block/loop0/queue/discard_max_bytes:0 /sys/devices/virtual/block/loop0/queue/discard_max_hw_bytes:0 /sys/devices/virtual/block/loop0/queue/discard_zeroes_data:0 /sys/devices/virtual/block/loop0/queue/max_discard_segments:1 With the patch applied: # losetup --version losetup from util-linux 2.37 # rmmod loop # losetup --find --show disk.img /dev/loop0 # grep '' /sys/devices/virtual/block/loop0/queue/*discard* /sys/devices/virtual/block/loop0/queue/discard_granularity:4096 /sys/devices/virtual/block/loop0/queue/discard_max_bytes:4294966784 /sys/devices/virtual/block/loop0/queue/discard_max_hw_bytes:4294966784 /sys/devices/virtual/block/loop0/queue/discard_zeroes_data:0 /sys/devices/virtual/block/loop0/queue/max_discard_segments:1 [1] https://github.com/karelzak/util-linux/pull/1152 drivers/block/loop.c | 2 ++ 1 file changed, 2 insertions(+) base-commit: 70585216fe7730d9fb5453d3e2804e149d0fe201 diff --git a/drivers/block/loop.c b/drivers/block/loop.c index 76e12f3482a9..ec957f6d8a49 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -1168,6 +1168,8 @@ static int loop_configure(struct loop_device *lo, fmode_t mode, if (partscan) lo->lo_disk->flags &= ~GENHD_FL_NO_PART_SCAN; + loop_config_discard(lo); + /* Grab the block_device to prevent its destruction after we * put /dev/loopXX inode. Later in __loop_clr_fd() we bdput(bdev). */