On Tue, Feb 23, 2021 at 02:53:30PM +0100, David Sterba wrote:

On Mon, Feb 22, 2021 at 10:19:06PM +0100, Goffredo Baroncelli wrote:

quoted

From: Goffredo Baroncelli <redacted>

This ioctl is a base for returning / setting information from / to  the
fields of the btrfs_dev_item object.

Please don't add a new ioctl for properties, they're using the xattr as
interface alrady.

We had some earlier discussion about why xattrs on an inode are a
bad idea for this feature:

	https://lore.kernel.org/linux-btrfs/20210123172118.GJ28049@hungrycats.org/ (local)

TL;DR they shouldn't be copied from one filesystem to another.

Maybe it's better from a CLI UI point of view to put them under 'btrfs
dev' instead of 'btrfs property'?