From patchwork Tue May 12 16:50:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Shinkevich X-Patchwork-Id: 11543623 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DD613139A for ; Tue, 12 May 2020 17:02:53 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BE04E206B8 for ; Tue, 12 May 2020 17:02:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BE04E206B8 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=virtuozzo.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:54684 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jYYIu-00084g-Rn for patchwork-qemu-devel@patchwork.kernel.org; Tue, 12 May 2020 13:02:52 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:52400) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jYY7S-0004oj-Uz; Tue, 12 May 2020 12:51:02 -0400 Received: from relay.sw.ru ([185.231.240.75]:50528) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jYY7P-0001R5-9P; Tue, 12 May 2020 12:51:02 -0400 Received: from dhcp-172-16-25-136.sw.ru ([172.16.25.136] helo=localhost.sw.ru) by relay.sw.ru with esmtp (Exim 4.92.3) (envelope-from ) id 1jYY7C-0004nT-Sg; Tue, 12 May 2020 19:50:46 +0300 From: Andrey Shinkevich To: qemu-block@nongnu.org Subject: [PATCH v4 06/15] block: Use CAFs in block status functions Date: Tue, 12 May 2020 19:50:36 +0300 Message-Id: <1589302245-893269-7-git-send-email-andrey.shinkevich@virtuozzo.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1589302245-893269-1-git-send-email-andrey.shinkevich@virtuozzo.com> References: <1589302245-893269-1-git-send-email-andrey.shinkevich@virtuozzo.com> Received-SPF: pass client-ip=185.231.240.75; envelope-from=andrey.shinkevich@virtuozzo.com; helo=relay.sw.ru X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/12 10:53:25 X-ACL-Warn: Detected OS = Linux 3.1-3.10 X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, fam@euphon.net, vsementsov@virtuozzo.com, armbru@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, andrey.shinkevich@virtuozzo.com, den@openvz.org, mreitz@redhat.com, jsnow@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" From: Max Reitz Use the child access functions in the block status inquiry functions as appropriate. Signed-off-by: Max Reitz Reviewed-by: Vladimir Sementsov-Ogievskiy --- block/io.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/block/io.c b/block/io.c index 7d30e61..47d8096 100644 --- a/block/io.c +++ b/block/io.c @@ -2387,11 +2387,12 @@ static int coroutine_fn bdrv_co_block_status(BlockDriverState *bs, if (ret & (BDRV_BLOCK_DATA | BDRV_BLOCK_ZERO)) { ret |= BDRV_BLOCK_ALLOCATED; } else if (want_zero) { + BlockDriverState *cow_bs = bdrv_filtered_cow_bs(bs); + if (bdrv_unallocated_blocks_are_zero(bs)) { ret |= BDRV_BLOCK_ZERO; - } else if (bs->backing) { - BlockDriverState *bs2 = bs->backing->bs; - int64_t size2 = bdrv_getlength(bs2); + } else if (cow_bs) { + int64_t size2 = bdrv_getlength(cow_bs); if (size2 >= 0 && offset >= size2) { ret |= BDRV_BLOCK_ZERO; @@ -2457,7 +2458,7 @@ static int coroutine_fn bdrv_co_block_status_above(BlockDriverState *bs, bool first = true; assert(bs != base); - for (p = bs; p != base; p = backing_bs(p)) { + for (p = bs; p != base; p = bdrv_filtered_bs(p)) { ret = bdrv_co_block_status(p, want_zero, offset, bytes, pnum, map, file); if (ret < 0) { @@ -2543,7 +2544,7 @@ int bdrv_block_status_above(BlockDriverState *bs, BlockDriverState *base, int bdrv_block_status(BlockDriverState *bs, int64_t offset, int64_t bytes, int64_t *pnum, int64_t *map, BlockDriverState **file) { - return bdrv_block_status_above(bs, backing_bs(bs), + return bdrv_block_status_above(bs, bdrv_filtered_bs(bs), offset, bytes, pnum, map, file); } @@ -2553,9 +2554,9 @@ int coroutine_fn bdrv_is_allocated(BlockDriverState *bs, int64_t offset, int ret; int64_t dummy; - ret = bdrv_common_block_status_above(bs, backing_bs(bs), false, offset, - bytes, pnum ? pnum : &dummy, NULL, - NULL); + ret = bdrv_common_block_status_above(bs, bdrv_filtered_bs(bs), false, + offset, bytes, pnum ? pnum : &dummy, + NULL, NULL); if (ret < 0) { return ret; } @@ -2618,7 +2619,7 @@ int bdrv_is_allocated_above(BlockDriverState *top, break; } - intermediate = backing_bs(intermediate); + intermediate = bdrv_filtered_bs(intermediate); } *pnum = n;