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From: Fiona Ebner <f.ebner@proxmox.com>
To: pve-devel@lists.proxmox.com
Subject: [pve-devel] [PATCH storage v3 06/13] rbd plugin: improve volume exists helper
Date: Thu, 19 Dec 2024 11:43:09 +0100	[thread overview]
Message-ID: <20241219104316.35329-7-f.ebner@proxmox.com> (raw)
In-Reply-To: <20241219104316.35329-1-f.ebner@proxmox.com>

Currently, the helper would not distinguish between different kinds
of errors. Instead of relying on an error, list the images and check
there.

Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
---

Changes in v3:
* do not match error message, list images instead

 src/PVE/Storage/RBDPlugin.pm | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/src/PVE/Storage/RBDPlugin.pm b/src/PVE/Storage/RBDPlugin.pm
index 44770b0..1d1cfad 100644
--- a/src/PVE/Storage/RBDPlugin.pm
+++ b/src/PVE/Storage/RBDPlugin.pm
@@ -357,11 +357,24 @@ sub rbd_volume_du {
 my sub rbd_volume_exists {
     my ($scfg, $storeid, $volname) = @_;
 
-    eval {
-	my $cmd = $rbd_cmd->($scfg, $storeid, 'info', $volname);
-	run_rbd_command($cmd, errmsg => "exist check",  quiet => 1);
-    };
-    return $@ ? undef : 1;
+    my $cmd = $rbd_cmd->($scfg, $storeid, 'ls', '--format', 'json');
+    my $raw = '';
+    run_rbd_command(
+	$cmd, errmsg => "rbd error", errfunc => sub {}, outfunc => sub { $raw .= shift; });
+
+    my $list;
+    if ($raw =~ m/^(\[.*\])$/s) { # untaint
+	$list = eval { JSON::decode_json($1); };
+	die "invalid JSON output from 'rbd ls': $@\n" if $@;
+    } else {
+	die "got unexpected data from 'rbd ls': '$raw'\n";
+    }
+
+    for my $name ($list->@*) {
+	return 1 if $name eq $volname;
+    }
+
+    return 0;
 }
 
 # Configuration
-- 
2.39.5



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  parent reply	other threads:[~2024-12-19 10:43 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-12-19 10:43 [pve-devel] [PATCH storage/container v3 00/13] import/export for shared storages Fiona Ebner
2024-12-19 10:43 ` [pve-devel] [PATCH storage v3 01/13] plugin: export/import: fix calls to path() method Fiona Ebner
2024-12-19 10:43 ` [pve-devel] [PATCH storage v3 02/13] rbd plugin: schema: document default value for 'krbd' setting Fiona Ebner
2024-12-19 10:43 ` [pve-devel] [PATCH storage v3 03/13] export: redirect stdout to avoid any unrelated messages ending up in the export stream Fiona Ebner
2024-12-19 10:43 ` [pve-devel] [PATCH storage v3 04/13] rbd plugin: factor out helper to check if volume already exists Fiona Ebner
2024-12-19 10:43 ` [pve-devel] [PATCH storage v3 05/13] rbd plugin: implement volume import/export Fiona Ebner
2024-12-19 10:43 ` Fiona Ebner [this message]
2024-12-19 10:43 ` [pve-devel] [PATCH storage v3 07/13] iscsi plugin: support volume export Fiona Ebner
2024-12-19 10:43 ` [pve-devel] [PATCH storage v3 08/13] iscsi direct " Fiona Ebner
2024-12-19 10:46   ` Fiona Ebner
2024-12-19 10:43 ` [pve-devel] [PATCH storage v3 09/13] common: introduce common module Fiona Ebner
2024-12-19 10:43 ` [pve-devel] [PATCH storage v3 10/13] plugins: volume import: align size up to 1KiB Fiona Ebner
2024-12-19 10:43 ` [pve-devel] [PATCH storage v3 11/13] rbd plugin: list: drop outdated error message check Fiona Ebner
2024-12-19 10:43 ` [pve-devel] [PATCH container v3 12/13] migration: allow rbd storages for remote migration Fiona Ebner
2024-12-19 10:43 ` [pve-devel] [PATCH container v3 13/13] migration: add reminder to evaluate dropping seemingly useless check for PVE 9 Fiona Ebner
2024-12-19 11:45 ` [pve-devel] partially-applied: [PATCH storage/container v3 00/13] import/export for shared storages Fabian Grünbichler
2024-12-19 12:17   ` Fiona Ebner

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