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-rw-r--r--fs/bcachefs/data_update.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/fs/bcachefs/data_update.c b/fs/bcachefs/data_update.c
index 0771a6d880bf..5ed66202c226 100644
--- a/fs/bcachefs/data_update.c
+++ b/fs/bcachefs/data_update.c
@@ -239,6 +239,34 @@ restart_drop_extra_replicas:
next_pos = insert->k.p;
+ /*
+ * Check for nonce offset inconsistency:
+ * This is debug code - we've been seeing this bug rarely, and
+ * it's been hard to reproduce, so this should give us some more
+ * information when it does occur:
+ */
+ struct printbuf err = PRINTBUF;
+ int invalid = bch2_bkey_invalid(c, bkey_i_to_s_c(insert), __btree_node_type(0, m->btree_id), 0, &err);
+ printbuf_exit(&err);
+
+ if (invalid) {
+ struct printbuf buf = PRINTBUF;
+
+ prt_str(&buf, "about to insert invalid key in data update path");
+ prt_str(&buf, "\nold: ");
+ bch2_bkey_val_to_text(&buf, c, old);
+ prt_str(&buf, "\nk: ");
+ bch2_bkey_val_to_text(&buf, c, k);
+ prt_str(&buf, "\nnew: ");
+ bch2_bkey_val_to_text(&buf, c, bkey_i_to_s_c(insert));
+
+ bch2_print_string_as_lines(KERN_ERR, buf.buf);
+ printbuf_exit(&buf);
+
+ bch2_fatal_error(c);
+ goto out;
+ }
+
ret = bch2_insert_snapshot_whiteouts(trans, m->btree_id,
k.k->p, bkey_start_pos(&insert->k)) ?:
bch2_insert_snapshot_whiteouts(trans, m->btree_id,