[pve-devel] [PATCH storage 1/6] dir plugin: update notes: don't attempt to remove non-existent notes

[Thomas Lamprecht]

On 24.09.21 10:54, Dominik Csapak wrote:
> On 9/17/21 15:02, Fabian Ebner wrote:
>> Signed-off-by: Fabian Ebner <f.ebner at proxmox.com>
>> ---
>>   PVE/Storage/DirPlugin.pm | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/PVE/Storage/DirPlugin.pm b/PVE/Storage/DirPlugin.pm
>> index 2267f11..0423e5f 100644
>> --- a/PVE/Storage/DirPlugin.pm
>> +++ b/PVE/Storage/DirPlugin.pm
>> @@ -109,7 +109,7 @@ sub update_volume_notes {
>>         if (defined($notes) && $notes ne '') {
>>       PVE::Tools::file_set_contents($path, $notes);
>> -    } else {
>> +    } elsif (-e $path) {
>>       unlink $path or die "could not delete notes - $!\n";
>>       }
>>       return;
>>
> 
> nit: it is still racy, and imho the correct solution would be to
> ignore the error but only if the file did not exists
> iow $! is ENOENT
> 
> for most cases it's enough though and i am not sure if the
> added complexity is worth it...

IMO it's worth it and it's really not much complexity..

use POSIX; # or `use POSIX qw(ENOENT);` if we filter default-exports from the POSIX module already

unlink $path;
die "could not delete notes - $!\n" if $! && $! != ENOENT;