bcachefs: Suppresss various error messages in no_data_io mode

We commonly use no_data_io mode when debugging filesystem metadata
dumps, where data checksum/compression errors are expected and
unimportant - this patch suppresses these.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/checksum.c

@@ -426,7 +426,7 @@ int bch2_rechecksum_bio(struct bch_fs *c, struct bio *bio,
 		merged = bch2_checksum_bio(c, crc_old.csum_type,
 				extent_nonce(version, crc_old), bio);
 
-	if (bch2_crc_cmp(merged, crc_old.csum)) {
+	if (bch2_crc_cmp(merged, crc_old.csum) && !c->opts.no_data_io) {
 		bch_err(c, "checksum error in bch2_rechecksum_bio() (memory corruption or bug?)\n"
 			"expected %0llx:%0llx got %0llx:%0llx (old type %s new type %s)",
 			crc_old.csum.hi,

fs/bcachefs/compress.c

@@ -240,7 +240,8 @@ int bch2_bio_uncompress_inplace(struct bch_fs *c, struct bio *bio,
 	data = __bounce_alloc(c, dst_len, WRITE);
 
 	if (__bio_uncompress(c, bio, data.b, *crc)) {
-		bch_err(c, "error rewriting existing data: decompression error");
+		if (!c->opts.no_data_io)
+			bch_err(c, "error rewriting existing data: decompression error");
 		bio_unmap_or_unbounce(c, data);
 		return -EIO;
 	}

fs/bcachefs/io.c

@@ -1082,7 +1082,8 @@ static enum prep_encoded_ret {
 	     op->incompressible)) {
 		if (!crc_is_compressed(op->crc) &&
 		    op->csum_type != op->crc.csum_type &&
-		    bch2_write_rechecksum(c, op, op->csum_type))
+		    bch2_write_rechecksum(c, op, op->csum_type) &&
+		    !c->opts.no_data_io)
 			return PREP_ENCODED_CHECKSUM_ERR;
 
 		return PREP_ENCODED_DO_WRITE;
@@ -1102,7 +1103,7 @@ static enum prep_encoded_ret {
 		csum = bch2_checksum_bio(c, op->crc.csum_type,
 					 extent_nonce(op->version, op->crc),
 					 bio);
-		if (bch2_crc_cmp(op->crc.csum, csum))
+		if (bch2_crc_cmp(op->crc.csum, csum) && !c->opts.no_data_io)
 			return PREP_ENCODED_CHECKSUM_ERR;
 
 		if (bch2_bio_uncompress_inplace(c, bio, &op->crc))
@@ -1120,7 +1121,8 @@ static enum prep_encoded_ret {
 	 */
 	if ((op->crc.live_size != op->crc.uncompressed_size ||
 	     op->crc.csum_type != op->csum_type) &&
-	    bch2_write_rechecksum(c, op, op->csum_type))
+	    bch2_write_rechecksum(c, op, op->csum_type) &&
+	    !c->opts.no_data_io)
 		return PREP_ENCODED_CHECKSUM_ERR;
 
 	/*
@@ -2416,7 +2418,8 @@ static void __bch2_read_endio(struct work_struct *work)
 		if (ret)
 			goto decrypt_err;
 
-		if (bch2_bio_uncompress(c, src, dst, dst_iter, crc))
+		if (bch2_bio_uncompress(c, src, dst, dst_iter, crc) &&
+		    !c->opts.no_data_io)
 			goto decompression_err;
 	} else {
 		/* don't need to decrypt the entire bio: */