From patchwork Thu Oct 24 05:32:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?C=C3=A9dric_Le_Goater?= X-Patchwork-Id: 13848317 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 3D229D0BB5E for ; Thu, 24 Oct 2024 05:33:21 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1t3qSe-0003bo-Oe; Thu, 24 Oct 2024 01:32:42 -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 1t3qSN-0003aS-Fn for qemu-devel@nongnu.org; Thu, 24 Oct 2024 01:32:25 -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 1t3qSJ-0004Ic-Ha for qemu-devel@nongnu.org; Thu, 24 Oct 2024 01:32:22 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1729747936; 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=qOSGfh1Uui/5RceMtbyXrhVmegZXFuC2W7IuPh+sr6w=; b=D2wBgCEmw3rmZq/0GAXw3MgbNlrDED4CdnZbW8rdoSVKD96KxxuWnWAqLGz16z4HTn4YXE ekcB6g+52D+FXfJ9UhUBU8sdaPCBEQFQm+TeqQPE8mNvRIU7hDEItKKkoVUhYl+aMcfObd zjS3py9u1lJBHv/IowvVwovaC88xUXk= Received: from mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-665-pyMS9ORGN-C8ioApMWkA2g-1; Thu, 24 Oct 2024 01:32:14 -0400 X-MC-Unique: pyMS9ORGN-C8ioApMWkA2g-1 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id C6C0E19560AB for ; Thu, 24 Oct 2024 05:32:13 +0000 (UTC) Received: from corto.redhat.com (unknown [10.39.192.9]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 399A31956056; Thu, 24 Oct 2024 05:32:11 +0000 (UTC) From: =?utf-8?q?C=C3=A9dric_Le_Goater?= To: qemu-devel@nongnu.org Cc: Alex Williamson , Peter Xu , =?utf-8?q?C=C3=A9dric_Le_Goater?= Subject: [PULL 3/4] vfio/helpers: Refactor vfio_region_mmap() error handling Date: Thu, 24 Oct 2024 07:32:02 +0200 Message-ID: <20241024053203.1559456-4-clg@redhat.com> In-Reply-To: <20241024053203.1559456-1-clg@redhat.com> References: <20241024053203.1559456-1-clg@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Received-SPF: pass client-ip=170.10.129.124; envelope-from=clg@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -40 X-Spam_score: -4.1 X-Spam_bar: ---- X-Spam_report: (-4.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.263, 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=-1.697, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=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: Alex Williamson Move error handling code to the end of the function so that it can more easily be shared by new mmap failure conditions. No functional change intended. Signed-off-by: Alex Williamson Reviewed-by: Peter Xu Reviewed-by: Cédric Le Goater --- hw/vfio/helpers.c | 34 +++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-) diff --git a/hw/vfio/helpers.c b/hw/vfio/helpers.c index ea15c79db0a3643f260fc1ce3abfeaa7001ab306..b9e606e364a2dd267bacd63094cdedae5dd7d8b2 100644 --- a/hw/vfio/helpers.c +++ b/hw/vfio/helpers.c @@ -395,7 +395,7 @@ static void vfio_subregion_unmap(VFIORegion *region, int index) int vfio_region_mmap(VFIORegion *region) { - int i, prot = 0; + int i, ret, prot = 0; char *name; if (!region->mem) { @@ -411,22 +411,8 @@ int vfio_region_mmap(VFIORegion *region) region->fd_offset + region->mmaps[i].offset); if (region->mmaps[i].mmap == MAP_FAILED) { - int ret = -errno; - - trace_vfio_region_mmap_fault(memory_region_name(region->mem), i, - region->fd_offset + - region->mmaps[i].offset, - region->fd_offset + - region->mmaps[i].offset + - region->mmaps[i].size - 1, ret); - - region->mmaps[i].mmap = NULL; - - for (i--; i >= 0; i--) { - vfio_subregion_unmap(region, i); - } - - return ret; + ret = -errno; + goto no_mmap; } name = g_strdup_printf("%s mmaps[%d]", @@ -446,6 +432,20 @@ int vfio_region_mmap(VFIORegion *region) } return 0; + +no_mmap: + trace_vfio_region_mmap_fault(memory_region_name(region->mem), i, + region->fd_offset + region->mmaps[i].offset, + region->fd_offset + region->mmaps[i].offset + + region->mmaps[i].size - 1, ret); + + region->mmaps[i].mmap = NULL; + + for (i--; i >= 0; i--) { + vfio_subregion_unmap(region, i); + } + + return ret; } void vfio_region_unmap(VFIORegion *region)