From 9d88883e68f404d5581bd391713ceef470ea53a9 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Tue, 8 Nov 2005 21:39:26 -0800 Subject: [PATCH] md: teach raid5 the difference between 'check' and 'repair'. With this, raid5 can be asked to check parity without repairing it. It also keeps a count of the number of incorrect parity blocks found (mismatches) and reports them through sysfs. Signed-off-by: Neil Brown Cc: Greg KH Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/md/raid5.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/md/raid5.c') diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 121fbaa9ed59..ce154553aca5 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -1292,6 +1292,11 @@ static void handle_stripe(struct stripe_head *sh) !memcmp(pagea, pagea+4, STRIPE_SIZE-4)) { /* parity is correct (on disc, not in buffer any more) */ set_bit(STRIPE_INSYNC, &sh->state); + } else { + conf->mddev->resync_mismatches += STRIPE_SECTORS; + if (test_bit(MD_RECOVERY_CHECK, &conf->mddev->recovery)) + /* don't try to repair!! */ + set_bit(STRIPE_INSYNC, &sh->state); } } if (!test_bit(STRIPE_INSYNC, &sh->state)) { -- cgit v1.2.1