[pve-devel] [PATCH storage] diskmanage: get_partnum: fix check

[Fabian Ebner <f.ebner@proxmox.com>]

Not replacing it with return, because the current behavior is dying:
    Can't "next" outside a loop block
and the single existing caller in pve-manager's API2/Ceph/OSD.pm does not check
the return value.

Also check for $st, which can be undefined in case a non-existing path was
provided. This also led to dying previously:
    Can't call method "mode" on an undefined value

Signed-off-by: Fabian Ebner <f.ebner@proxmox.com>
---
 PVE/Diskmanage.pm | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/PVE/Diskmanage.pm b/PVE/Diskmanage.pm
index 853d333..b916d2e 100644
--- a/PVE/Diskmanage.pm
+++ b/PVE/Diskmanage.pm
@@ -750,7 +750,9 @@ sub get_partnum {
 
     my $st = stat($part_path);
 
-    next if !$st->mode || !S_ISBLK($st->mode) || !$st->rdev;
+    die "error detecting block device '$part_path'\n"
+	if !$st || !$st->mode || !S_ISBLK($st->mode) || !$st->rdev;
+
     my $major = PVE::Tools::dev_t_major($st->rdev);
     my $minor = PVE::Tools::dev_t_minor($st->rdev);
     my $partnum_path = "/sys/dev/block/$major:$minor/";
-- 
2.20.1