From patchwork Mon Aug 5 21:08:47 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 13754061 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 BDF1DC3DA7F for ; Mon, 5 Aug 2024 21:10:23 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sb4xt-0003NT-Tx; Mon, 05 Aug 2024 17:10:02 -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 1sb4xJ-0000Z8-1W for qemu-devel@nongnu.org; Mon, 05 Aug 2024 17:09:25 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sb4xG-0008VV-LU for qemu-devel@nongnu.org; Mon, 05 Aug 2024 17:09:24 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1722892162; 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=7fUnXN9vjFAkhcC+JDQXUlQenfUijIgKJLPelVxzZjo=; b=X3SOcUSg0q5thCYLlzkDUjy3La2GYhGoGfmqRsHAB+LdQoEGtqeTR8oIS5vXlVDZiTDXyg wOJtv+ysIjjfoP8Xk4zFDNydd/SExvqHKpFrnQyOOWRk3+79e4zFF0XZ/m43yttdw4Dvp/ 1zmdd5f4UAYvHRk0EVDi8sUjfwHMuBc= Received: from mx-prod-mc-03.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-636-IIpnlJlcPuaxNyCw5H5PLA-1; Mon, 05 Aug 2024 17:09:18 -0400 X-MC-Unique: IIpnlJlcPuaxNyCw5H5PLA-1 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (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-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id B57AC19560AA; Mon, 5 Aug 2024 21:09:17 +0000 (UTC) Received: from merkur.fritz.box (unknown [10.39.193.224]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 5E96430001AA; Mon, 5 Aug 2024 21:09:16 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Cc: kwolf@redhat.com, qemu-devel@nongnu.org Subject: [PULL 09/13] vvfat: Fix usage of `info.file.offset` Date: Mon, 5 Aug 2024 23:08:47 +0200 Message-ID: <20240805210851.314076-10-kwolf@redhat.com> In-Reply-To: <20240805210851.314076-1-kwolf@redhat.com> References: <20240805210851.314076-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Received-SPF: pass client-ip=170.10.133.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.143, 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_H4=0.001, RCVD_IN_MSPIKE_WL=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 From: Amjad Alsharafi The field is marked as "the offset in the file (in clusters)", but it was being used like this `cluster_size*(nums)+mapping->info.file.offset`, which is incorrect. Signed-off-by: Amjad Alsharafi Reviewed-by: Kevin Wolf Message-ID: <72f19a7903886dda1aa78bcae0e17702ee939262.1721470238.git.amjadsharafi10@gmail.com> Signed-off-by: Kevin Wolf --- block/vvfat.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/block/vvfat.c b/block/vvfat.c index a67cfa823b..cfde468c2e 100644 --- a/block/vvfat.c +++ b/block/vvfat.c @@ -1408,7 +1408,9 @@ read_cluster_directory: assert(s->current_fd); - offset=s->cluster_size*(cluster_num-s->current_mapping->begin)+s->current_mapping->info.file.offset; + offset = s->cluster_size * + ((cluster_num - s->current_mapping->begin) + + s->current_mapping->info.file.offset); if(lseek(s->current_fd, offset, SEEK_SET)!=offset) return -3; s->cluster=s->cluster_buffer; @@ -1929,8 +1931,9 @@ get_cluster_count_for_direntry(BDRVVVFATState* s, direntry_t* direntry, const ch (mapping->mode & MODE_DIRECTORY) == 0) { /* was modified in qcow */ - if (offset != mapping->info.file.offset + s->cluster_size - * (cluster_num - mapping->begin)) { + if (offset != s->cluster_size + * ((cluster_num - mapping->begin) + + mapping->info.file.offset)) { /* offset of this cluster in file chain has changed */ abort(); copy_it = 1; @@ -2404,7 +2407,7 @@ static int commit_mappings(BDRVVVFATState* s, (mapping->end - mapping->begin); } else next_mapping->info.file.offset = mapping->info.file.offset + - mapping->end - mapping->begin; + (mapping->end - mapping->begin); mapping = next_mapping; }