diff options
| author | Darrick J. Wong <djwong@kernel.org> | 2022-10-21 14:30:05 -0700 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2022-11-09 19:07:16 -0800 |
| commit | 423ac23dc1ed6f7c37b7b57a2c43724c51c44dfe (patch) | |
| tree | ead3e9b2b5bd77b8a77db385835fa2189d621280 | |
| parent | 80e5a9ba218ca6cf4b950b858c20e3a8df9d368d (diff) | |
xfs: always scrub record/key order of interior recordsbtree-key-enhancements_2022-11-09
In commit d47fef9342d0, we removed the firstrec and firstkey fields of
struct xchk_btree because Christoph thought they were unnecessary
because we could use the record index in the btree cursor. This is
incorrect because bc_ptrs (now bc_levels[].ptr) tracks the cursor
position within a specific btree block, not within the entire level.
The end result is that scrub no longer detects situations where the
rightmost record of a block is identical to the leftmost record of that
block's right sibling. Fix this regression by reintroducing record
validity booleans so that order checking skips *only* the leftmost
record/key in each level.
Fixes: d47fef9342d0 ("xfs: don't track firstrec/firstkey separately in xchk_btree")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
| -rw-r--r-- | fs/xfs/scrub/btree.c | 14 | ||||
| -rw-r--r-- | fs/xfs/scrub/btree.h | 8 |
2 files changed, 15 insertions, 7 deletions
diff --git a/fs/xfs/scrub/btree.c b/fs/xfs/scrub/btree.c index 615f52e56f4e..2dfa3e1d5841 100644 --- a/fs/xfs/scrub/btree.c +++ b/fs/xfs/scrub/btree.c @@ -151,11 +151,12 @@ xchk_btree_rec( trace_xchk_btree_rec(bs->sc, cur, 0); - /* If this isn't the first record, are they in order? */ - if (cur->bc_levels[0].ptr > 1 && + /* Are all records across all record blocks in order? */ + if (bs->lastrec_valid && !cur->bc_ops->recs_inorder(cur, &bs->lastrec, rec)) xchk_btree_set_corrupt(bs->sc, cur, 0); memcpy(&bs->lastrec, rec, cur->bc_ops->rec_len); + bs->lastrec_valid = true; if (cur->bc_nlevels == 1) return; @@ -198,11 +199,12 @@ xchk_btree_key( trace_xchk_btree_key(bs->sc, cur, level); - /* If this isn't the first key, are they in order? */ - if (cur->bc_levels[level].ptr > 1 && - !cur->bc_ops->keys_inorder(cur, &bs->lastkey[level - 1], key)) + /* Are all low keys across all node blocks in order? */ + if (bs->lastkey[level - 1].valid && + !cur->bc_ops->keys_inorder(cur, &bs->lastkey[level - 1].key, key)) xchk_btree_set_corrupt(bs->sc, cur, level); - memcpy(&bs->lastkey[level - 1], key, cur->bc_ops->key_len); + memcpy(&bs->lastkey[level - 1].key, key, cur->bc_ops->key_len); + bs->lastkey[level - 1].valid = true; if (level + 1 >= cur->bc_nlevels) return; diff --git a/fs/xfs/scrub/btree.h b/fs/xfs/scrub/btree.h index 26c499925b5e..def8da9c4b4a 100644 --- a/fs/xfs/scrub/btree.h +++ b/fs/xfs/scrub/btree.h @@ -31,6 +31,11 @@ typedef int (*xchk_btree_rec_fn)( struct xchk_btree *bs, const union xfs_btree_rec *rec); +struct xchk_btree_key { + union xfs_btree_key key; + bool valid; +}; + struct xchk_btree { /* caller-provided scrub state */ struct xfs_scrub *sc; @@ -40,11 +45,12 @@ struct xchk_btree { void *private; /* internal scrub state */ + bool lastrec_valid; union xfs_btree_rec lastrec; struct list_head to_check; /* this element must come last! */ - union xfs_btree_key lastkey[]; + struct xchk_btree_key lastkey[]; }; /* |