md/raid10: Handle write errors by updating badblock log.
When we get a write error (in the data area, not in metadata),
update the badblock log rather than failing the whole device.
As the write may well be many blocks, we trying writing each
block individually and only log the ones which fail.
Signed-off-by: NeilBrown <neilb@suse.de>
diff --git a/drivers/md/raid10.h b/drivers/md/raid10.h
index d8b7f9a..79cb52a 100644
--- a/drivers/md/raid10.h
+++ b/drivers/md/raid10.h
@@ -139,4 +139,5 @@
* known-bad-block records, we set this flag.
*/
#define R10BIO_MadeGood 5
+#define R10BIO_WriteError 6
#endif