From mboxrd@z Thu Jan 1 00:00:00 1970 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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 1EF7BC433DB for ; Tue, 26 Jan 2021 14:38:33 +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 B9F6422D58 for ; Tue, 26 Jan 2021 14:38:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B9F6422D58 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:53924 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l4PUF-0004Dt-LA for qemu-devel@archiver.kernel.org; Tue, 26 Jan 2021 09:38:31 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:46914) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l4PDr-0000bD-6T for qemu-devel@nongnu.org; Tue, 26 Jan 2021 09:21:35 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:43785) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1l4PDm-0006Iu-Df for qemu-devel@nongnu.org; Tue, 26 Jan 2021 09:21:34 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1611670889; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Cu9MwT2CdfGPrg3EMlOLRjxF2ldDYMYSvnDncq7VrkI=; b=Ipd3Lt4Yp6FEPCJtf5otH4OLSGRGh31w9s2fjEmGYDaFqieLrEIM6D5vF0hMAdznk007Cs zptEh0wNziOnmsxzpKPpo/PJ3ZT6jDEYXmWjcdp3mxN4oIs3zM9EtD5uNamnhy88g/9gQu IqIqxFtdBavXcYCTkjKeq8KhsZYEXOo= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-496-UO8GvGM2NJ2Jv7bQR4sbkg-1; Tue, 26 Jan 2021 09:21:23 -0500 X-MC-Unique: UO8GvGM2NJ2Jv7bQR4sbkg-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A0D03107ACF7; Tue, 26 Jan 2021 14:21:22 +0000 (UTC) Received: from localhost (ovpn-114-175.ams2.redhat.com [10.36.114.175]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 4076960871; Tue, 26 Jan 2021 14:21:22 +0000 (UTC) From: Max Reitz To: qemu-block@nongnu.org Subject: [PULL 28/53] block/block-copy: implement block_copy_async Date: Tue, 26 Jan 2021 15:19:51 +0100 Message-Id: <20210126142016.806073-29-mreitz@redhat.com> In-Reply-To: <20210126142016.806073-1-mreitz@redhat.com> References: <20210126142016.806073-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mreitz@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" Received-SPF: pass client-ip=63.128.21.124; envelope-from=mreitz@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.255, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no 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: Kevin Wolf , Peter Maydell , qemu-devel@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Vladimir Sementsov-Ogievskiy We'll need async block-copy invocation to use in backup directly. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Max Reitz Message-Id: <20210116214705.822267-4-vsementsov@virtuozzo.com> Signed-off-by: Max Reitz --- include/block/block-copy.h | 29 ++++++++++++++ block/block-copy.c | 81 ++++++++++++++++++++++++++++++++++++-- 2 files changed, 106 insertions(+), 4 deletions(-) diff --git a/include/block/block-copy.h b/include/block/block-copy.h index 6397505f30..8c225ebf81 100644 --- a/include/block/block-copy.h +++ b/include/block/block-copy.h @@ -19,7 +19,9 @@ #include "qemu/co-shared-resource.h" typedef void (*ProgressBytesCallbackFunc)(int64_t bytes, void *opaque); +typedef void (*BlockCopyAsyncCallbackFunc)(void *opaque); typedef struct BlockCopyState BlockCopyState; +typedef struct BlockCopyCallState BlockCopyCallState; BlockCopyState *block_copy_state_new(BdrvChild *source, BdrvChild *target, int64_t cluster_size, bool use_copy_range, @@ -41,6 +43,33 @@ int64_t block_copy_reset_unallocated(BlockCopyState *s, int coroutine_fn block_copy(BlockCopyState *s, int64_t offset, int64_t bytes, bool *error_is_read); +/* + * Run block-copy in a coroutine, create corresponding BlockCopyCallState + * object and return pointer to it. Never returns NULL. + * + * Caller is responsible to call block_copy_call_free() to free + * BlockCopyCallState object. + */ +BlockCopyCallState *block_copy_async(BlockCopyState *s, + int64_t offset, int64_t bytes, + BlockCopyAsyncCallbackFunc cb, + void *cb_opaque); + +/* + * Free finished BlockCopyCallState. Trying to free running + * block-copy will crash. + */ +void block_copy_call_free(BlockCopyCallState *call_state); + +/* + * Note, that block-copy call is marked finished prior to calling + * the callback. + */ +bool block_copy_call_finished(BlockCopyCallState *call_state); +bool block_copy_call_succeeded(BlockCopyCallState *call_state); +bool block_copy_call_failed(BlockCopyCallState *call_state); +int block_copy_call_status(BlockCopyCallState *call_state, bool *error_is_read); + BdrvDirtyBitmap *block_copy_dirty_bitmap(BlockCopyState *s); void block_copy_set_skip_unallocated(BlockCopyState *s, bool skip); diff --git a/block/block-copy.c b/block/block-copy.c index 6ea55f1f9a..74655b86f8 100644 --- a/block/block-copy.c +++ b/block/block-copy.c @@ -30,13 +30,19 @@ static coroutine_fn int block_copy_task_entry(AioTask *task); typedef struct BlockCopyCallState { - /* IN parameters */ + /* IN parameters. Initialized in block_copy_async() and never changed. */ BlockCopyState *s; int64_t offset; int64_t bytes; + BlockCopyAsyncCallbackFunc cb; + void *cb_opaque; + + /* Coroutine where async block-copy is running */ + Coroutine *co; /* State */ - bool failed; + int ret; + bool finished; /* OUT parameters */ bool error_is_read; @@ -428,8 +434,8 @@ static coroutine_fn int block_copy_task_entry(AioTask *task) ret = block_copy_do_copy(t->s, t->offset, t->bytes, t->zeroes, &error_is_read); - if (ret < 0 && !t->call_state->failed) { - t->call_state->failed = true; + if (ret < 0 && !t->call_state->ret) { + t->call_state->ret = ret; t->call_state->error_is_read = error_is_read; } else { progress_work_done(t->s->progress, t->bytes); @@ -679,6 +685,12 @@ static int coroutine_fn block_copy_common(BlockCopyCallState *call_state) */ } while (ret > 0); + call_state->finished = true; + + if (call_state->cb) { + call_state->cb(call_state->cb_opaque); + } + return ret; } @@ -700,6 +712,67 @@ int coroutine_fn block_copy(BlockCopyState *s, int64_t start, int64_t bytes, return ret; } +static void coroutine_fn block_copy_async_co_entry(void *opaque) +{ + block_copy_common(opaque); +} + +BlockCopyCallState *block_copy_async(BlockCopyState *s, + int64_t offset, int64_t bytes, + BlockCopyAsyncCallbackFunc cb, + void *cb_opaque) +{ + BlockCopyCallState *call_state = g_new(BlockCopyCallState, 1); + + *call_state = (BlockCopyCallState) { + .s = s, + .offset = offset, + .bytes = bytes, + .cb = cb, + .cb_opaque = cb_opaque, + + .co = qemu_coroutine_create(block_copy_async_co_entry, call_state), + }; + + qemu_coroutine_enter(call_state->co); + + return call_state; +} + +void block_copy_call_free(BlockCopyCallState *call_state) +{ + if (!call_state) { + return; + } + + assert(call_state->finished); + g_free(call_state); +} + +bool block_copy_call_finished(BlockCopyCallState *call_state) +{ + return call_state->finished; +} + +bool block_copy_call_succeeded(BlockCopyCallState *call_state) +{ + return call_state->finished && call_state->ret == 0; +} + +bool block_copy_call_failed(BlockCopyCallState *call_state) +{ + return call_state->finished && call_state->ret < 0; +} + +int block_copy_call_status(BlockCopyCallState *call_state, bool *error_is_read) +{ + assert(call_state->finished); + if (error_is_read) { + *error_is_read = call_state->error_is_read; + } + return call_state->ret; +} + BdrvDirtyBitmap *block_copy_dirty_bitmap(BlockCopyState *s) { return s->copy_bitmap; -- 2.29.2