bcachefs: Make sure allocation failure errors are logged

The previous patch fixed a bug in allocation path error handling, and it
would've been noticed sooner had it been logged properly.

Generally speaking, errors that shouldn't happen in normal operation and
are being returned up the stack should be logged: the write path was
already logging IO errors, but non IO errors were missed.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/bcachefs.h

@@ -326,6 +326,12 @@ do {									\
 		bch_err(_c, "%s(): error %s", __func__, bch2_err_str(_ret));\
 } while (0)
 
+#define bch_err_fn_ratelimited(_c, _ret)				\
+do {									\
+	if (should_print_err(_ret))					\
+		bch_err_ratelimited(_c, "%s(): error %s", __func__, bch2_err_str(_ret));\
+} while (0)
+
 #define bch_err_msg(_c, _ret, _msg, ...)				\
 do {									\
 	if (should_print_err(_ret))					\

fs/bcachefs/btree_update_interior.c

@@ -1190,6 +1190,9 @@ bch2_btree_update_start(struct btree_trans *trans, struct btree_path *path,
 	return as;
 err:
 	bch2_btree_update_free(as, trans);
+	if (!bch2_err_matches(ret, ENOSPC) &&
+	    !bch2_err_matches(ret, EROFS))
+		bch_err_fn_ratelimited(c, ret);
 	return ERR_PTR(ret);
 }
 

fs/bcachefs/data_update.c

@@ -418,6 +418,8 @@ static void bch2_update_unwritten_extent(struct btree_trans *trans,
 			continue;
 		}
 
+		bch_err_fn_ratelimited(c, ret);
+
 		if (ret)
 			return;
 

fs/bcachefs/io_misc.c

@@ -61,7 +61,7 @@ int bch2_extent_fallocate(struct btree_trans *trans,
 		 */
 		ret = bch2_disk_reservation_get(c, &disk_res, sectors, new_replicas, 0);
 		if (unlikely(ret))
-			goto err;
+			goto err_noprint;
 
 		bch2_bkey_buf_reassemble(&old, c, k);
 	}
@@ -125,7 +125,12 @@ int bch2_extent_fallocate(struct btree_trans *trans,
 err:
 	if (!ret && sectors_allocated)
 		bch2_increment_clock(c, sectors_allocated, WRITE);
-
+	if (should_print_err(ret))
+		bch_err_inum_offset_ratelimited(c,
+			inum.inum,
+			iter->pos.offset << 9,
+			"%s(): error: %s", __func__, bch2_err_str(ret));
+err_noprint:
 	bch2_open_buckets_put(c, &open_buckets);
 	bch2_disk_reservation_put(c, &disk_res);
 	bch2_bkey_buf_exit(&new, c);

fs/bcachefs/io_write.c

@@ -1463,6 +1463,10 @@ static void __bch2_write(struct bch_write_op *op)
 			op->flags |= BCH_WRITE_DONE;
 
 			if (ret < 0) {
+				bch_err_inum_offset_ratelimited(c,
+					op->pos.inode,
+					op->pos.offset << 9,
+					"%s(): error: %s", __func__, bch2_err_str(ret));
 				op->error = ret;
 				break;
 			}