[RFC 0/2] Add dummy RAID stripe tree entries for PREALLOC data

[Johannes Thumshirn <jth@kernel.org>]

This is an RFC implementation of Qu's request to be able to
distinguish preallocated extents in the stripe tree for scrub.

It's not 100% working yet but only showing the basic "how it's going to
look like".

I'm not really sure this is a better solution than returning ENOENT
and ignoring it in scrub.

A third possibility would be to do a full backref walk on
btrfs_map_block() error and then check if it's a preallocated extent.

Johannes Thumshirn (2):
  btrfs: introduce dummy RAID stripes for preallocated data
  btrfs: insert dummy RAID stripe extents for preallocated data

 fs/btrfs/inode.c                | 47 +++++++++++++++++++++++++++++++++
 fs/btrfs/raid-stripe-tree.c     | 47 +++++++++++++++++++++++++++++++++
 fs/btrfs/raid-stripe-tree.h     |  2 ++
 include/uapi/linux/btrfs_tree.h |  1 +
 4 files changed, 97 insertions(+)

-- 
2.43.0