From a1528ffe8f86ca87f52c55781fc8f8a2bce4f603 Mon Sep 17 00:00:00 2001 From: Aaron Lauterer Date: Mon, 23 May 2022 12:54:25 +0200 Subject: [PATCH] rbd: get_rbd_dev_path: return /dev/rbd path only if cluster matches The changes in cfe46e2d4a97a83f1bbe6ad656e6416399309ba2 git not catch all situations. In the case of a guest having 2 disk images with the same name on a pool with the same name but in two different ceph clusters we still had issues when starting it. The first disk got mapped as expected. The second disk did not get mapped because we returned the old $path to "/dev/rbd//" because it already existed from the first disk. In the case that only the "old" /dev/rbd path exists and we do not have the /dev/rbd-pve//... path available, we now check if the cluster fsid used by that rbd device matches the one we expect. If it does, then we are in the situation that the image has been mapped before the new rbd-pve udev rule was introduced. If it does not, then we have the situation of an ambiguous mapping in /dev/rbd and return the $pve_path. Signed-off-by: Aaron Lauterer --- PVE/Storage/RBDPlugin.pm | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/PVE/Storage/RBDPlugin.pm b/PVE/Storage/RBDPlugin.pm index 3511914..eeeaf3f 100644 --- a/PVE/Storage/RBDPlugin.pm +++ b/PVE/Storage/RBDPlugin.pm @@ -3,6 +3,7 @@ package PVE::Storage::RBDPlugin; use strict; use warnings; +use Cwd qw(abs_path); use IO::File; use JSON; use Net::IP; @@ -13,7 +14,7 @@ use PVE::JSONSchema qw(get_standard_option); use PVE::ProcFSTools; use PVE::RADOS; use PVE::Storage::Plugin; -use PVE::Tools qw(run_command trim); +use PVE::Tools qw(run_command trim file_read_firstline); use base qw(PVE::Storage::Plugin); @@ -66,7 +67,13 @@ my sub get_rbd_dev_path { my $pve_path = "/dev/rbd-pve/${cluster_id}/${rbd_path}"; my $path = "/dev/rbd/${rbd_path}"; - return $path if !-e $pve_path && -e $path; # mapped before rbd-pve udev rule existed + if (!-e $pve_path && -e $path) { + # possibly mapped before rbd-pve rule existed + my $real_dev = abs_path($path); + my ($rbd_id) = ($real_dev =~ m|/dev/rbd([0-9]+)$|); + my $dev_cluster_id = file_read_firstline("/sys/devices/rbd/${rbd_id}/cluster_fsid"); + return $path if $cluster_id eq $dev_cluster_id; + } return $pve_path; }