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bcachefs: fsck: Fix remove_backpointer() for subvol roots

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The dirent will be in a different snapshot if the inode is a subvolume
root.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet
2025-06-16 14:15:28 -04:00
parent 7029cc4d13
commit c1ca07a4dd
1 changed files with 9 additions and 1 deletions
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10
fs/bcachefs/fsck.c
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@@ -493,10 +493,18 @@ static int remove_backpointer(struct btree_trans *trans,
if (!inode->bi_dir)
return 0;
u32 snapshot = inode->bi_snapshot;
if (inode->bi_parent_subvol) {
int ret = bch2_subvolume_get_snapshot(trans, inode->bi_parent_subvol, &snapshot);
if (ret)
return ret;
}
struct bch_fs *c = trans->c;
struct btree_iter iter;
struct bkey_s_c_dirent d = dirent_get_by_pos(trans, &iter,
SPOS(inode->bi_dir, inode->bi_dir_offset, inode->bi_snapshot));
SPOS(inode->bi_dir, inode->bi_dir_offset, snapshot));
int ret = bkey_err(d) ?:
dirent_points_to_inode(c, d, inode) ?:
bch2_fsck_remove_dirent(trans, d.k->p);