[dm-devel] [PATCH v5 00/11] dm: Improve zoned block device support

[Mike Snitzer]

On Tue, Jun 01 2021 at  6:57P -0400,
Damien Le Moal <Damien.LeMoal at wdc.com> wrote:

> On 2021/05/26 6:25, Damien Le Moal wrote:
> > This series improve device mapper support for zoned block devices and
> > of targets exposing a zoned device.
> 
> Mike, Jens,
> 
> Any feedback regarding this series ?
> 
> > 
> > The first patch improve support for user requests to reset all zones of
> > the target device. With the fix, such operation behave similarly to
> > physical block devices implementation based on the single zone reset
> > command with the ALL bit set.
> > 
> > The following 2 patches are preparatory block layer patches.
> > 
> > Patch 4 and 5 are 2 small fixes to DM core zoned block device support.
> > 
> > Patch 6 reorganizes DM core code, moving conditionally defined zoned
> > block device code into the new dm-zone.c file. This avoids sprinkly DM
> > with zone related code defined under an #ifdef CONFIG_BLK_DEV_ZONED.
> > 
> > Patch 7 improves DM zone report helper functions for target drivers.
> > 
> > Patch 8 fixes a potential problem with BIO requeue on zoned target.
> > 
> > Finally, patch 9 to 11 implement zone append emulation using regular
> > writes for target drivers that cannot natively support this BIO type.
> > The only target currently needing this emulation is dm-crypt. With this
> > change, a zoned dm-crypt device behaves exactly like a regular zoned
> > block device, correctly executing user zone append BIOs.
> > 
> > This series passes the following tests:
> > 1) zonefs tests on top of dm-crypt with a zoned nullblk device
> > 2) zonefs tests on top of dm-crypt+dm-linear with an SMR HDD
> > 3) btrfs fstests on top of dm-crypt with zoned nullblk devices.
> > 
> > Comments are as always welcome.

I've picked up DM patches 4-8 because they didn't depend on the first
3 block patches.

But I'm fine with picking up 1-3 if Jens provides his Acked-by.
And then I can pickup the remaining DM patches 9-11.

Thanks,
Mike