From patchwork Tue Dec 13 08:53:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 13071814 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id ACE95C4167B for ; Tue, 13 Dec 2022 08:54:42 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1p512w-0006Ps-LL; Tue, 13 Dec 2022 03:53:54 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1p512t-0006N1-GM for qemu-devel@nongnu.org; Tue, 13 Dec 2022 03:53:51 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1p512r-00031G-K2 for qemu-devel@nongnu.org; Tue, 13 Dec 2022 03:53:51 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1670921629; 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: in-reply-to:in-reply-to:references:references; bh=rDIT5R8xLa5n0OX6Q2beZjyG+PsX1tFuVapUyb7CGoI=; b=NtEECSa+Rv+WX2SF630YAkfpA49lQKsOV+H3sPX/T2jEF4LKlsAB/TYHWukX04vULUmF/F at2wvMVzh8LJN1rU+ZnNdAKpUDl4LdXTFDBdr4tiSOkzHQ32p20euCBkAxRuO28F3O6acB AyV7HkNfcLI+vegR/FoUUswGZY12VXY= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-623-P4rglM8ZPaayNTLiUfhnjQ-1; Tue, 13 Dec 2022 03:53:47 -0500 X-MC-Unique: P4rglM8ZPaayNTLiUfhnjQ-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 392592932491; Tue, 13 Dec 2022 08:53:47 +0000 (UTC) Received: from merkur.redhat.com (unknown [10.39.192.221]) by smtp.corp.redhat.com (Postfix) with ESMTP id 20239492C1B; Tue, 13 Dec 2022 08:53:46 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Cc: kwolf@redhat.com, hreitz@redhat.com, eesposit@redhat.com, pbonzini@redhat.com, vsementsov@yandex-team.ru, qemu-devel@nongnu.org Subject: [PATCH 12/14] block: convert bdrv_lock_medium in co_wrapper Date: Tue, 13 Dec 2022 09:53:18 +0100 Message-Id: <20221213085320.95673-13-kwolf@redhat.com> In-Reply-To: <20221213085320.95673-1-kwolf@redhat.com> References: <20221213085320.95673-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.9 Received-SPF: pass client-ip=170.10.129.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Emanuele Giuseppe Esposito bdrv_lock_medium() is categorized as an I/O function, and it currently doesn't run in a coroutine. We should let it take a graph rdlock since it traverses the block nodes graph, which however is only possible in a coroutine. The only caller of this function is blk_lock_medium(). Therefore make blk_lock_medium() a co_wrapper, so that it always creates a new coroutine, and then make bdrv_lock_medium() a coroutine_fn where the lock can be taken. Signed-off-by: Emanuele Giuseppe Esposito Signed-off-by: Kevin Wolf --- include/block/block-io.h | 2 +- include/block/block_int-common.h | 2 +- include/sysemu/block-backend-io.h | 4 +++- block.c | 2 +- block/block-backend.c | 4 ++-- block/copy-on-read.c | 2 +- block/filter-compress.c | 2 +- block/raw-format.c | 2 +- 8 files changed, 11 insertions(+), 9 deletions(-) diff --git a/include/block/block-io.h b/include/block/block-io.h index f3d49ea05f..7e76bb647a 100644 --- a/include/block/block-io.h +++ b/include/block/block-io.h @@ -143,7 +143,7 @@ int bdrv_get_flags(BlockDriverState *bs); bool coroutine_fn bdrv_co_is_inserted(BlockDriverState *bs); bool co_wrapper bdrv_is_inserted(BlockDriverState *bs); -void bdrv_lock_medium(BlockDriverState *bs, bool locked); +void coroutine_fn bdrv_co_lock_medium(BlockDriverState *bs, bool locked); void coroutine_fn bdrv_co_eject(BlockDriverState *bs, bool eject_flag); const char *bdrv_get_format_name(BlockDriverState *bs); diff --git a/include/block/block_int-common.h b/include/block/block_int-common.h index fd31b37567..0de99682e2 100644 --- a/include/block/block_int-common.h +++ b/include/block/block_int-common.h @@ -712,7 +712,7 @@ struct BlockDriver { /* removable device specific */ bool coroutine_fn (*bdrv_is_inserted)(BlockDriverState *bs); void coroutine_fn (*bdrv_eject)(BlockDriverState *bs, bool eject_flag); - void (*bdrv_lock_medium)(BlockDriverState *bs, bool locked); + void coroutine_fn (*bdrv_lock_medium)(BlockDriverState *bs, bool locked); /* to control generic scsi devices */ BlockAIOCB *(*bdrv_aio_ioctl)(BlockDriverState *bs, diff --git a/include/sysemu/block-backend-io.h b/include/sysemu/block-backend-io.h index 00209625e1..780c1e5f77 100644 --- a/include/sysemu/block-backend-io.h +++ b/include/sysemu/block-backend-io.h @@ -58,7 +58,9 @@ bool coroutine_fn blk_co_is_inserted(BlockBackend *blk); bool co_wrapper_mixed blk_is_inserted(BlockBackend *blk); bool blk_is_available(BlockBackend *blk); -void blk_lock_medium(BlockBackend *blk, bool locked); + +void coroutine_fn blk_co_lock_medium(BlockBackend *blk, bool locked); +void co_wrapper blk_lock_medium(BlockBackend *blk, bool locked); void coroutine_fn blk_co_eject(BlockBackend *blk, bool eject_flag); void co_wrapper blk_eject(BlockBackend *blk, bool eject_flag); diff --git a/block.c b/block.c index 11647e49db..d5e660bc9d 100644 --- a/block.c +++ b/block.c @@ -6834,7 +6834,7 @@ void coroutine_fn bdrv_co_eject(BlockDriverState *bs, bool eject_flag) * Lock or unlock the media (if it is locked, the user won't be able * to eject it manually). */ -void bdrv_lock_medium(BlockDriverState *bs, bool locked) +void coroutine_fn bdrv_co_lock_medium(BlockDriverState *bs, bool locked) { BlockDriver *drv = bs->drv; IO_CODE(); diff --git a/block/block-backend.c b/block/block-backend.c index 233ce6d05a..fcc9ede031 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -1999,13 +1999,13 @@ bool blk_is_available(BlockBackend *blk) return blk_is_inserted(blk) && !blk_dev_is_tray_open(blk); } -void blk_lock_medium(BlockBackend *blk, bool locked) +void coroutine_fn blk_co_lock_medium(BlockBackend *blk, bool locked) { BlockDriverState *bs = blk_bs(blk); IO_CODE(); if (bs) { - bdrv_lock_medium(bs, locked); + bdrv_co_lock_medium(bs, locked); } } diff --git a/block/copy-on-read.c b/block/copy-on-read.c index 76f884a6ae..ccc767f37b 100644 --- a/block/copy-on-read.c +++ b/block/copy-on-read.c @@ -224,7 +224,7 @@ static void cor_eject(BlockDriverState *bs, bool eject_flag) static void cor_lock_medium(BlockDriverState *bs, bool locked) { - bdrv_lock_medium(bs->file->bs, locked); + bdrv_co_lock_medium(bs->file->bs, locked); } diff --git a/block/filter-compress.c b/block/filter-compress.c index 571e4684dd..e10312c225 100644 --- a/block/filter-compress.c +++ b/block/filter-compress.c @@ -124,7 +124,7 @@ static void compress_eject(BlockDriverState *bs, bool eject_flag) static void compress_lock_medium(BlockDriverState *bs, bool locked) { - bdrv_lock_medium(bs->file->bs, locked); + bdrv_co_lock_medium(bs->file->bs, locked); } diff --git a/block/raw-format.c b/block/raw-format.c index efe1ef0265..adc766bf79 100644 --- a/block/raw-format.c +++ b/block/raw-format.c @@ -410,7 +410,7 @@ static void raw_eject(BlockDriverState *bs, bool eject_flag) static void raw_lock_medium(BlockDriverState *bs, bool locked) { - bdrv_lock_medium(bs->file->bs, locked); + bdrv_co_lock_medium(bs->file->bs, locked); } static int coroutine_fn raw_co_ioctl(BlockDriverState *bs,