[PATCH v3 0/2] btrfs: fix inlined file extent items in data reloc

[Qu Wenruo <wqu@suse.com>]

[CHANGELOG]
v3:
- Use btrfs_is_data_reloc_root()

- Reword the cause analyze to avoid confusion

- Expand the [FIX] section to explain why disabling compression will
  avoid inlined extents

v2:
- Add more explanation on why we can created inlined extents even if
  relocation is preallocating space

- Add the fixes: tag since the behavior is caused by a specific commit

There is a syzbot report that an inlined file extent item in a data
reloc inode triggered a sanity check in get_new_location().

It turns out that we can create inlined file extents for data reloc
inodes in the first place after commit 3eaf5f082c4c ("btrfs: extract
inlined creation into a dedicated delalloc helper").

So the first patch will avoid compression for data reloc inodes first,
then the second patch to reject inlined file extent items in
get_new_location(), making the checks more robust.

Qu Wenruo (2):
  btrfs: do not try compression for data reloc inodes
  btrfs: reject inline file extents item in get_new_location()

 fs/btrfs/btrfs_inode.h | 2 ++
 fs/btrfs/relocation.c  | 7 +++++++
 2 files changed, 9 insertions(+)

-- 
2.54.0