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 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 1BCE0C77B6C for ; Mon, 3 Apr 2023 18:34:07 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pjP0D-0001lJ-Ff; Mon, 03 Apr 2023 14:34:01 -0400 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 1pjP0C-0001l4-3b for qemu-devel@nongnu.org; Mon, 03 Apr 2023 14:34:00 -0400 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 1pjP0A-0001H7-Os for qemu-devel@nongnu.org; Mon, 03 Apr 2023 14:33:59 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1680546837; 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=hLGTNhZNr3bIXX7Mx11PRwkKdI3CfrxoXkyIIe5WNhM=; b=F+KGODZeWnjO06iBeGXu1GsIu2iw04oQLGujd32EevpihS9Rzx5T4Qqtfrde3BHMI4LZgx iYk27pdQUail9zYFunJ3RytksdYoSbs+oUuJVGn/eXH1RzdkZ8BNdIHrOaXRiKQ/nf/wQn +6IYJL4BHd8jmiVFQeTEV2m4dfzayFI= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-117-j26lxWggN_O159O5n3-PNg-1; Mon, 03 Apr 2023 14:33:46 -0400 X-MC-Unique: j26lxWggN_O159O5n3-PNg-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 3118C885620; Mon, 3 Apr 2023 18:30:37 +0000 (UTC) Received: from localhost (unknown [10.39.192.107]) by smtp.corp.redhat.com (Postfix) with ESMTP id 71C5440C6EC4; Mon, 3 Apr 2023 18:30:36 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org Cc: Paolo Bonzini , Julia Suvorova , Stefan Hajnoczi , Kevin Wolf , Peter Lieven , Coiby Xu , xen-devel@lists.xenproject.org, Richard Henderson , Stefano Garzarella , , Eduardo Habkost , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Paul Durrant , "Richard W.M. 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Tsirkin" , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Anthony Perard Subject: [PATCH 11/13] block/fuse: take AioContext lock around blk_exp_ref/unref() Date: Mon, 3 Apr 2023 14:30:02 -0400 Message-Id: <20230403183004.347205-12-stefanha@redhat.com> In-Reply-To: <20230403183004.347205-1-stefanha@redhat.com> References: <20230403183004.347205-1-stefanha@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.1 on 10.11.54.2 Received-SPF: pass client-ip=170.10.129.124; envelope-from=stefanha@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=unavailable 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 These functions must be called with the AioContext acquired: /* Callers must hold exp->ctx lock */ void blk_exp_ref(BlockExport *exp) ... /* Callers must hold exp->ctx lock */ void blk_exp_unref(BlockExport *exp) Signed-off-by: Stefan Hajnoczi --- block/export/fuse.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/block/export/fuse.c b/block/export/fuse.c index 06fa41079e..18394f9e07 100644 --- a/block/export/fuse.c +++ b/block/export/fuse.c @@ -244,7 +244,9 @@ static void read_from_fuse_export(void *opaque) FuseExport *exp = opaque; int ret; + aio_context_acquire(exp->common.ctx); blk_exp_ref(&exp->common); + aio_context_release(exp->common.ctx); do { ret = fuse_session_receive_buf(exp->fuse_session, &exp->fuse_buf); @@ -256,7 +258,9 @@ static void read_from_fuse_export(void *opaque) fuse_session_process_buf(exp->fuse_session, &exp->fuse_buf); out: + aio_context_acquire(exp->common.ctx); blk_exp_unref(&exp->common); + aio_context_release(exp->common.ctx); } static void fuse_export_shutdown(BlockExport *blk_exp) -- 2.39.2