md: don't reset curr_resync_completed after an interrupted resync

If a resync/recovery/check/repair is interrupted for some reason, it
can be useful to know exactly where it got up to.
So in that case, do not clear curr_resync_completed.
Initialise it when starting a resync/recovery/... instead.

Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/drivers/md/md.c b/drivers/md/md.c
index a08aa58..d79a406 100644 (file)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -6381,6 +6381,7 @@ void md_do_sync(mddev_t *mddev)
                       desc, mdname(mddev));
                mddev->curr_resync = j;
        }
+       mddev->curr_resync_completed = mddev->curr_resync;
 
        while (j < max_sectors) {
                sector_t sectors;
@@ -6532,7 +6533,8 @@ void md_do_sync(mddev_t *mddev)
        } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery))
                mddev->resync_min = mddev->curr_resync_completed;
        mddev->curr_resync = 0;
-       mddev->curr_resync_completed = 0;
+       if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery))
+               mddev->curr_resync_completed = 0;
        sysfs_notify(&mddev->kobj, NULL, "sync_completed");
        wake_up(&resync_wait);
        set_bit(MD_RECOVERY_DONE, &mddev->recovery);