[PATCH] md: count corrected read errors per drive

Store this total in superblock (As appropriate), and make it available to
userspace via sysfs.

Signed-off-by: Neil Brown <neilb@suse.de>
Acked-by: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
index 686463115438..68b929c079ab 100644
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -95,6 +95,10 @@ struct mdk_rdev_s
         atomic_t        read_errors;    /* number of consecutive read errors that
                                          * we have tried to ignore.
                                          */
+        atomic_t        corrected_errors; /* number of corrected read errors,
+                                           * for reporting to userspace and storing
+                                           * in superblock.
+                                           */
 };
 
 struct mddev_s