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bcachefs: check bi_parent_subvol in check_inode()

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check for inodes with a nonzero bi_parent_subvol field that aren't
actually subvolume roots

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-02-06 23:41:46 -05:00
parent 971a1503a2
commit 0b498a5a39
1 changed files with 10 additions and 0 deletions
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10
fs/bcachefs/fsck.c
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@ -1009,6 +1009,16 @@ static int check_inode(struct btree_trans *trans,
goto err;
}
if (fsck_err_on(u.bi_parent_subvol &&
(u.bi_subvol == 0 ||
u.bi_subvol == BCACHEFS_ROOT_SUBVOL),
c, inode_bi_parent_subvol_nonzero,
"inode %llu:%u has subvol %u but nonzero parent subvol %u",
u.bi_inum, k.k->p.snapshot, u.bi_subvol, u.bi_parent_subvol)) {
u.bi_parent_subvol = 0;
do_update = true;
}
if (u.bi_subvol) {
struct bch_subvolume s;