Re: One failed raid device can't umount automatically

[Xiao Ni <xni@redhat.com>]

Hi all

Any good suggestion for this problem?

Regards
Xiao

On 01/12/2021 04:42 PM, Xiao Ni wrote:
> Hi all
>
> We support to umount one failed raid device automatically. But it 
> can't work now.
> For example, one 3 disks raid5 device /dev/md0. I unplug two disks one 
> by one.
> The udev rule udev-md-raid-assembly.rules is triggered when unplug disk.
>
> In this udev rule, it calls `mdadm -If $disk` when unplug one disk. 
> Function IncrementalRemove
> is called. When the raid doesn't have enough disks to be active, it 
> tries to stop the array.
> Before stopping the array, it tries to umount the raid device first.
>
> Now it uses udisks to umount raid device. I printed logs during test. 
> It gives error message
> "Permission denied". Then I tried with umount directly, it failed with 
> the same error message.
>
> diff --git a/Incremental.c b/Incremental.c
> index e849bdd..96ba234 100644
> --- a/Incremental.c
> +++ b/Incremental.c
> @@ -1620,6 +1620,7 @@ static void run_udisks(char *arg1, char *arg2)
>                 manage_fork_fds(1);
>                 execl("/usr/bin/udisks", "udisks", arg1, arg2, NULL);
>                 execl("/bin/udisks", "udisks", arg1, arg2, NULL);
> +               execl("/usr/bin/umount", "umount", arg2, NULL);
>                 exit(1);
>         }
>         while (pid > 0 && wait(&status) != pid)
>
> Does anyone know how to fix this problem?
>
> Regards
> Xiao
>