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 460B6CF9C6F for ; Mon, 23 Sep 2024 16:39:34 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ssm5a-0006g0-Sj; Mon, 23 Sep 2024 12:39:06 -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 1ssm5S-0006Nu-Au for qemu-devel@nongnu.org; Mon, 23 Sep 2024 12:38:58 -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 1ssm5P-0002b8-9O for qemu-devel@nongnu.org; Mon, 23 Sep 2024 12:38:57 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1727109533; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:in-reply-to:in-reply-to: references:references; bh=tOB3zabxRlWoXExj8FrqCm95Pa09ZuzKc1H2OvBsXOQ=; b=NtX9u4+8I+KmYmtLekKPq3JOatRbALIZC363sZl3NbIQ41wj8+HfHwnPaRn9uLKk64qmso 6g8jJo3HygOf6wGsFfGtrF1JTvhQ0dnOvBLdn2U6o3I3wwbhlOI7rO71V7CX0GsZ0QThoE 8tDzh7QRF+AtkCT3ucGtFgJB70EYfDU= Received: from mx-prod-mc-05.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-571-U9m4cdGfNHGaYAqYkV_DrQ-1; Mon, 23 Sep 2024 12:38:49 -0400 X-MC-Unique: U9m4cdGfNHGaYAqYkV_DrQ-1 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (unknown [10.30.177.12]) (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-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 256CF190A0BB; Mon, 23 Sep 2024 16:38:48 +0000 (UTC) Received: from redhat.com (unknown [10.45.224.47]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 401EB19560AA; Mon, 23 Sep 2024 16:38:31 +0000 (UTC) Date: Mon, 23 Sep 2024 18:38:27 +0200 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Eric Blake Cc: "Richard W.M. Jones" , Thomas Huth , Alex =?utf-8?Q?Benn=C3=A9e?= , Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= , Vladimir Sementsov-Ogievskiy , Peter Lieven , qemu-devel@nongnu.org, Kevin Wolf , Hanna Reitz , Paolo Bonzini , Konstantin Kostiuk , qemu-block@nongnu.org Subject: Re: [PATCH for-9.1 6/9] block/nbd: Use URI parsing code from glib Message-ID: References: <20240328140607.2433889-1-thuth@redhat.com> <20240328140607.2433889-7-thuth@redhat.com> <20240328141342.GK7636@redhat.com> <20240922195122.GK5140@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/2.2.12 (2023-09-09) X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Received-SPF: pass client-ip=170.10.129.124; envelope-from=berrange@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=-0.144, 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_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=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: , Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Mon, Sep 23, 2024 at 11:03:08AM -0500, Eric Blake wrote: > On Sun, Sep 22, 2024 at 08:51:22PM GMT, Richard W.M. Jones wrote: > > On Thu, Mar 28, 2024 at 02:13:42PM +0000, Richard W.M. Jones wrote: > > > On Thu, Mar 28, 2024 at 03:06:03PM +0100, Thomas Huth wrote: > > > > Since version 2.66, glib has useful URI parsing functions, too. > > > > Use those instead of the QEMU-internal ones to be finally able > > > > to get rid of the latter. The g_uri_get_host() also takes care > > > > of removing the square brackets from IPv6 addresses, so we can > > > > drop that part of the QEMU code now, too. > > > > > > > > > > > > > - p = uri->path ? uri->path : ""; > > > > + p = g_uri_get_path(uri) ?: ""; > > > > if (p[0] == '/') { > > > > p++; > > > > } > > > > Looks ok, > > > > > > Reviewed-by: Richard W.M. Jones > > > > Or maybe not. This caused a regression in the nbdkit test suite (when > > we use qemu-img from 9.1). It seems the exportname part of the NBD > > URI gets munged: > > > > https://gitlab.com/qemu-project/qemu/-/issues/2584 > > To be more specific, it looks like > g_uri_get_path("./name//with//..//slashes") is getting munged to > "name/slashes". That is, glib is blindly assuming that ./ and XXX/../ > can be dropped, and // can be simplified to /, which may be true for > arbitrary file names but not true for abitrary URIs (since URIs have > application-specific semantics, which may not match path name > traversal semantics). Looks like we need to report a bug to glib, > and/or see if glib's URI functions have a flag for turning off this > unwanted munging. The source code indicates it is doing some normalization based on this: https://datatracker.ietf.org/doc/html/rfc3986#section-5.2.4 With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|