From patchwork Wed Jun 17 10:20:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lin Ma X-Patchwork-Id: 1311097 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=suse.com 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 ozlabs.org (Postfix) with ESMTPS id 49n1VY5Kklz9sRh for ; Wed, 17 Jun 2020 20:28:05 +1000 (AEST) Received: from localhost ([::1]:57734 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jlVIZ-0005tq-7A for incoming@patchwork.ozlabs.org; Wed, 17 Jun 2020 06:28:03 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54406) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jlVGq-0004GS-77; Wed, 17 Jun 2020 06:26:16 -0400 Received: from [114.255.249.163] (port=49827 helo=localhost) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jlVGo-0007Ok-EB; Wed, 17 Jun 2020 06:26:15 -0400 Received: by localhost (Postfix, from userid 0) id 16553140E50; Wed, 17 Jun 2020 18:20:24 +0800 (CST) From: Lin Ma To: qemu-block@nongnu.org Subject: [PATCH v2 1/3] block: Add bdrv_co_get_lba_status Date: Wed, 17 Jun 2020 18:20:17 +0800 Message-Id: <20200617102019.29652-2-lma@suse.com> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200617102019.29652-1-lma@suse.com> References: <20200617102019.29652-1-lma@suse.com> MIME-Version: 1.0 X-Host-Lookup-Failed: Reverse DNS lookup failed for 114.255.249.163 (failed) Received-SPF: none client-ip=114.255.249.163; envelope-from=root@localhost; helo=localhost X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/17 06:20:25 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Spam_score_int: 68 X-Spam_score: 6.8 X-Spam_bar: ++++++ X-Spam_report: (6.8 / 5.0 requ) BAYES_00=-1.9, FSL_HELO_NON_FQDN_1=0.001, HEADER_FROM_DIFFERENT_DOMAINS=1, HELO_LOCALHOST=3.828, RCVD_IN_MSPIKE_BL=0.01, RCVD_IN_MSPIKE_ZBI=2.7, RCVD_IN_XBL=0.375, RDNS_NONE=0.793, SPF_NONE=0.001 autolearn=_AUTOLEARN X-Spam_action: reject 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: fam@euphon.net, kwolf@redhat.com, qemu-devel@nongnu.org, mreitz@redhat.com, stefanha@redhat.com, Lin Ma , pbonzini@redhat.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" The get lba status wrapper based on the bdrv_block_status. The following patches will add GET LBA STATUS 16 support for scsi emulation layer. Signed-off-by: Lin Ma --- block/io.c | 43 +++++++++++++++++++++++++++++++++++++++ include/block/block_int.h | 5 +++++ 2 files changed, 48 insertions(+) diff --git a/block/io.c b/block/io.c index df8f2a98d4..2064016b19 100644 --- a/block/io.c +++ b/block/io.c @@ -2208,6 +2208,49 @@ int coroutine_fn bdrv_co_pwrite_zeroes(BdrvChild *child, int64_t offset, BDRV_REQ_ZERO_WRITE | flags); } +int coroutine_fn +bdrv_co_get_lba_status(BdrvChild *child, int64_t offset, int64_t bytes, + uint32_t *num_blocks, uint32_t *is_deallocated) +{ + BlockDriverState *bs = child->bs; + int ret = 0; + int64_t target_size, count = 0; + bool first = true; + uint8_t wanted_bit1 = 0; + + target_size = bdrv_getlength(bs); + if (target_size < 0) { + return -EIO; + } + + if (offset < 0 || bytes < 0) { + return -EIO; + } + + for ( ; offset <= target_size - bytes; offset += count) { + ret = bdrv_block_status(bs, offset, bytes, &count, NULL, NULL); + if (ret < 0) { + goto out; + } + if (first) { + if (ret & BDRV_BLOCK_ZERO) { + wanted_bit1 = BDRV_BLOCK_ZERO >> 1; + *is_deallocated = 1; + } else { + wanted_bit1 = 0; + } + first = false; + } + if ((ret & BDRV_BLOCK_ZERO) >> 1 == wanted_bit1) { + (*num_blocks)++; + } else { + break; + } + } +out: + return ret; +} + /* * Flush ALL BDSes regardless of if they are reachable via a BlkBackend or not. */ diff --git a/include/block/block_int.h b/include/block/block_int.h index 791de6a59c..43f90591b9 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -1296,6 +1296,11 @@ int coroutine_fn bdrv_co_block_status_from_backing(BlockDriverState *bs, int64_t *pnum, int64_t *map, BlockDriverState **file); +int coroutine_fn bdrv_co_get_lba_status(BdrvChild *child, + int64_t offset, + int64_t bytes, + uint32_t *num_blocks, + uint32_t *is_deallocated); const char *bdrv_get_parent_name(const BlockDriverState *bs); void blk_dev_change_media_cb(BlockBackend *blk, bool load, Error **errp); bool blk_dev_has_removable_media(BlockBackend *blk);