bcachefs: Always emit new extents on partial overwrite

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This is prep work for snapshots: the algorithm in
bch2_extent_sort_fix_overlapping() will break when we have multiple
overlapping extents in unrelated snapshots - but, we'll be able to make
extents work like regular keys and use bch2_key_sort_fix_overlapping()
for extent btree nodes if we make a couple changes - the main one being
to always emit new extents when we partially overwrite an existing
(written) extent.

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

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Kent Overstreet 2019-11-20 16:22:49 -05:00 • committed by Kent Overstreet

parent c201e2d976

commit 183797e31d

1 changed files with 125 additions and 168 deletions

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fs/bcachefs/extent_update.c

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