add header!

 brassow

This patch adds the ability detect read failures during
recovery and flag the device as failed.

We add a call to fail_mirror() when 'read_err' is set
upon recovery completion.  This sets the error_count
on the device.  It maintains backwards compatibility
(does nothing) if the DM_RAID1_HANDLE_ERRORS flag is
not set during mirror device creation.

Using the same code put in place to handle write failures,
it ensures that the region is marked as 'not-in-sync'
and that this is reflected in the log.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>

---
 drivers/md/dm-raid1.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletion(-)

Index: linux-2.6.23/drivers/md/dm-raid1.c
===================================================================
--- linux-2.6.23.orig/drivers/md/dm-raid1.c	2007-10-13 06:49:00.000000000 +0100
+++ linux-2.6.23/drivers/md/dm-raid1.c	2007-10-13 06:49:01.000000000 +0100
@@ -719,8 +719,10 @@ static void recovery_complete(int read_e
 	unsigned m;
 	int bit = 0;
 
-	if (read_err)
+	if (read_err) {
 		DMERR_LIMIT("Unable to read primary mirror during recovery");
+		fail_mirror(ms->default_mirror);
+	}
 
 	if (!write_err)
 		goto out;