On Tue, May 25, 2021 at 11:12:21AM -0700, Eric Biggers wrote: > On Wed, May 05, 2021 at 12:20:39PM -0700, Boris Burkov wrote: > > The tree checker currently rejects unrecognized flags when it reads > > btrfs_inode_item. Practically, this means that adding a new flag makes > > the change backwards incompatible if the flag is ever set on a file. > > > > Take up one of the 4 reserved u64 fields in the btrfs_inode_item as a > > new "compat_flags". These flags are zero on inode creation in btrfs and > > mkfs and are ignored by an older kernel, so it should be safe to use > > them in this way. > > > > Signed-off-by: Boris Burkov <boris@xxxxxx> > > This patchset doesn't have a cover letter anymore for some reason. > > Also, please mention where this patchset applies to. I tried mainline and > btrfs/for-next, but neither works. There was a parallel change updating file attributes causing conflict with the patchset as sent. Boris is aware of that and the new version will be on top of something that appalies on top of the btrfs development branch again.
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