bcachefs: Topology repair now uses nodes found by scanning to fill holes

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With the new btree node scan code, we can now recover from corrupt btree
roots - simply create a new fake root at depth 1, and then insert all
the leaves we found.

If the root wasn't corrupt but there's corruption elsewhere in the
btree, we can fill in holes as needed with the newest version of a given
node(s) from the scan; we also check if a given btree node is older than
what we found from the scan.

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

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This commit is contained in:

Kent Overstreet 2024-03-16 22:45:30 -04:00

parent 4409b8081d

commit 43f5ea4646

2 changed files with 199 additions and 107 deletions

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299

fs/bcachefs/btree_gc.c

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3

fs/bcachefs/sb-errors_types.h

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