From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.proxmox.com (Postfix) with ESMTPS id E027F9CC5B for ; Thu, 1 Jun 2023 15:53:44 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id CA2961EDC3 for ; Thu, 1 Jun 2023 15:53:44 +0200 (CEST) Received: from proxmox-new.maurer-it.com (proxmox-new.maurer-it.com [94.136.29.106]) (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 firstgate.proxmox.com (Proxmox) with ESMTPS for ; Thu, 1 Jun 2023 15:53:43 +0200 (CEST) Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1]) by proxmox-new.maurer-it.com (Proxmox) with ESMTP id 57B1D4826A for ; Thu, 1 Jun 2023 15:53:43 +0200 (CEST) From: Aaron Lauterer To: pve-devel@lists.proxmox.com Date: Thu, 1 Jun 2023 15:53:38 +0200 Message-Id: <20230601135342.2903359-4-a.lauterer@proxmox.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230601135342.2903359-1-a.lauterer@proxmox.com> References: <20230601135342.2903359-1-a.lauterer@proxmox.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SPAM-LEVEL: Spam detection results: 0 AWL -0.093 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DMARC_MISSING 0.1 Missing DMARC policy KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record T_SCC_BODY_TEXT_LINE -0.01 - Subject: [pve-devel] [PATCH v3 qemu-server 3/7] migration: fail when aliased volume is detected X-BeenThere: pve-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE development discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 01 Jun 2023 13:53:44 -0000 Aliased volids can lead to unexpected behavior in a migration. An aliased volid can happen if we have two storage configurations, pointing to the same place. The resulting 'path' for a disk image will be the same. Therefore, stop the migration in such a case. The check works by comparing the path returned by the storage plugin. We decided against checking the storages themselves being aliased. It is not possible to infer that reliably from just the storage configuration options alone. Signed-off-by: Aaron Lauterer --- We did discuss moving the check into its own function so that we can call it in other places as well, for example during the VM start to be able to show a warning. I haven't gotten around to it yet, but wanted to get this version of the sries out so we can review the other parts of the series. Therefore, we could not apply this and the next patch (maching tests) for now. PVE/QemuMigrate.pm | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/PVE/QemuMigrate.pm b/PVE/QemuMigrate.pm index 163a721..6148cf5 100644 --- a/PVE/QemuMigrate.pm +++ b/PVE/QemuMigrate.pm @@ -299,12 +299,12 @@ sub scan_local_volumes { my $storecfg = $self->{storecfg}; eval { - # found local volumes and their origin my $local_volumes = $self->{local_volumes}; my $local_volumes_errors = {}; my $other_errors = []; my $abort = 0; + my $path_to_volid = {}; my $log_error = sub { my ($msg, $volid) = @_; @@ -391,6 +391,8 @@ sub scan_local_volumes { die "owned by other VM (owner = VM $owner)\n" if !$owner || ($owner != $vmid); + $path_to_volid->{$path}->{$volid} = 1; + return if $attr->{is_vmstate}; if (defined($snaprefs)) { @@ -424,6 +426,12 @@ sub scan_local_volumes { } }); + for my $path (keys %$path_to_volid) { + my @volids = keys $path_to_volid->{$path}->%*; + die "detected not supported aliased volumes: '" . join("', '", @volids) . "'" + if (scalar(@volids) > 1); + } + foreach my $vol (sort keys %$local_volumes) { my $type = $replicatable_volumes->{$vol} ? 'local, replicated' : 'local'; my $ref = $local_volumes->{$vol}->{ref}; -- 2.30.2