Re: wapbl file system on logical volume

[Christof Meerwald <cmeerw%cmeerw.org@localhost>]

On Sun, Sep 28, 2025 at 10:50:08AM +0200, Matthias Petermann wrote:
> Hello Christof,
> 
> On Sat Sep 27, 2025 at 9:12 PM CEST, Christof Meerwald wrote:
> > Just thought I'd give LVM a try (on 11.0_BETA). Everything seemed to
> > be fine until I tried to mount a filesystem with the "log" option:
> >
> > mount -o log /dev/mapper/M247--X10E--9N--vg-netbsd--test /mnt/test/
> > mount_ffs: /dev/mapper/M247--X10E--9N--vg-netbsd--test on /mnt/test: Inappropriate ioctl for device
> >
> > but without the log option it's fine:
> >
> > mount /dev/mapper/M247--X10E--9N--vg-netbsd--test /mnt/test/
> 
> Not sure if this helps, but as I am also interested in exactly
> this setup you are using here let me add some data points:
> 
> ```
> ~ [ sudo lvm lvs                                                  ] 10:40 vorm.
>   LV   VG   Attr   LSize   Origin Snap%  Move Log Copy%  Convert
>   data vg0  -wi-a- 200,00g                                      
>   home vg0  -wi-a- 200,00g  
> ```
> 
> ```
> ~ [ cat /etc/fstab
> ...                                                ] 10:38 vorm.
> /dev/mapper/vg0-data	/u	ffs	rw,log	0	0
> /dev/mapper/vg0-home	/h	ffs	rw,log	0	0
> ```
> 	
> ```
> ~ [ mount                                                         ] 10:39 vorm.
> ...
> /dev/mapper/vg0-data on /u type ffs (log, local)
> /dev/mapper/vg0-home on /h type ffs (log, local)
> ```
> 
> ```
> ~ [ uname -a                                                      ] 10:40 vorm.
> NetBSD x230.lan 10.1 NetBSD 10.1 (GENERIC) #0: Mon Dec 16 13:08:11 UTC 2024  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
> ```
> 
> Summary: in NetBSD 10.1 this works.
> 
> How did you create the filesystem in the LV? newfs -O2
> is required I think to use wapbl.

Was actually using "newfs -O2ea" (but "newfs -O2" makes no difference).

I have now been able to test this in a small test VM.

As you say, with NetBSD 10.1 it works fine, but with a NetBSD
11.0_BETA kernel (Wed Sep 24 12:39:13 UTC 2025) I get the
"Inappropriate ioctl for device" error when trying to mount with "-o
log" (that's with a newly created filesystem).

So if I first mount the filesystem with "-o log" with NetBSD 10.1
first, and then switch to NetBSD 11.0_BETA, I can mount the
filesystem.

And just to double-check: if I don't use LVM, I can create and mount a
filesystem with "-o log" on NetBSD 11.0_BETA.


Christof

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