[dm-devel] fuzzing bcachefs with dm-flakey

[Darrick J. Wong]

On Fri, Jun 09, 2023 at 08:56:37PM +0200, Mikulas Patocka wrote:
> 
> 
> On Thu, 1 Jun 2023, Darrick J. Wong wrote:
> 
> > On Mon, May 29, 2023 at 04:59:40PM -0400, Mikulas Patocka wrote:
> >
> > > #!/bin/sh -ex
> > > umount /mnt/test || true
> > > dmsetup remove_all || true
> > > rmmod brd || true
> > > SRC=/usr/src/git/bcachefs-tools
> > > while true; do
> > >         modprobe brd rd_size=1048576
> > >         bcachefs format --replicas=2 /dev/ram0 /dev/ram1
> > >         dmsetup create flakey --table "0 `blockdev --getsize /dev/ram0` linear /dev/ram0 0"
> > >         mount -t bcachefs /dev/mapper/flakey:/dev/ram1 /mnt/test
> > >         dmsetup load flakey --table "0 `blockdev --getsize /dev/ram0` flakey /dev/ram0 0 0 1 4 random_write_corrupt 100000000 random_read_corrupt 100000000"
> > 
> > Hey, that's really neat!
> > 
> > Any chance you'd be willing to get the dm-flakey changes merged into
> > upstream so that someone can write a recoveryloop fstest to test all the
> > filesystems systematically?
> > 
> > :D
> > 
> > --D
> 
> Yes, we will merge improved dm-flakey in the next merge window.

Thank you!

--D

> Mikulas
>