From: Jonathan Brassow <jbrassow@redhat.com>
Date: Fri, 8 Feb 2008 02:11:32 +0000 (+0000)
Subject: dm raid1: handle recovery failures
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=8f0205b798f926e2745de5fdebf0a8605c621de6;p=openwrt%2Fstaging%2Fblogic.git

dm raid1: handle recovery failures

This patch adds the calls to 'fail_mirror' if an error occurs during
mirror recovery (aka resynchronization).  'fail_mirror' is responsible
for recording the type of error by mirror device and ensuring an event
gets raised for the purpose of notifying userspace.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
---

diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index 4e1e04dbc4ab..9978b9f07fe9 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -737,15 +737,32 @@ out:
 static void recovery_complete(int read_err, unsigned int write_err,
 			      void *context)
 {
-	struct region *reg = (struct region *) context;
+	struct region *reg = (struct region *)context;
+	struct mirror_set *ms = reg->rh->ms;
+	int m, bit = 0;
 
-	if (read_err)
+	if (read_err) {
 		/* Read error means the failure of default mirror. */
 		DMERR_LIMIT("Unable to read primary mirror during recovery");
+		fail_mirror(get_default_mirror(ms), DM_RAID1_SYNC_ERROR);
+	}
 
-	if (write_err)
+	if (write_err) {
 		DMERR_LIMIT("Write error during recovery (error = 0x%x)",
 			    write_err);
+		/*
+		 * Bits correspond to devices (excluding default mirror).
+		 * The default mirror cannot change during recovery.
+		 */
+		for (m = 0; m < ms->nr_mirrors; m++) {
+			if (&ms->mirror[m] == get_default_mirror(ms))
+				continue;
+			if (test_bit(bit, &write_err))
+				fail_mirror(ms->mirror + m,
+					    DM_RAID1_SYNC_ERROR);
+			bit++;
+		}
+	}
 
 	rh_recovery_end(reg, !(read_err || write_err));
 }