bcachefs: Use KEY_TYPE_deleted whitouts for extents

Browse source

Previously, partial overwrites of existing extents were handled
implicitly by the btree code; when reading in a btree node, we'd do a
mergesort of the different bsets and detect and fix partially
overlapping extents during that mergesort.

That approach won't work with snapshots: this changes extents to work
like regular keys as far as the btree code is concerned, where a 0 size
KEY_TYPE_deleted whiteout will completely overwrite an existing extent.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

...

This commit is contained in:

Kent Overstreet 2019-11-26 17:26:04 -05:00 • committed by Kent Overstreet

parent 1c3ff72c0f

commit bcd6f3e06f

8 changed files with 244 additions and 133 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

8

fs/bcachefs/bcachefs_format.h

View file

268

fs/bcachefs/bkey_sort.c

View file

36

fs/bcachefs/btree_io.c

View file

2

fs/bcachefs/btree_types.h

View file

7

fs/bcachefs/btree_update_interior.c

View file

2

fs/bcachefs/btree_update_leaf.c

View file

88

fs/bcachefs/extent_update.c

View file

2

fs/bcachefs/recovery.c

View file