[PATCH] md: Make 'reshape' a possible sync_action action

This allows reshape to be triggerred via sysfs (which is the only way to start
it happening).

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 1a637676a930..a79dd33d343d 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2247,7 +2247,14 @@ action_store(mddev_t *mddev, const char *page, size_t len)
                 return -EBUSY;
         else if (cmd_match(page, "resync") || cmd_match(page, "recover"))
                 set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
-        else {
+        else if (cmd_match(page, "reshape")) {
+                int err;
+                if (mddev->pers->start_reshape == NULL)
+                        return -EINVAL;
+                err = mddev->pers->start_reshape(mddev);
+                if (err)
+                        return err;
+        } else {
                 if (cmd_match(page, "check"))
                         set_bit(MD_RECOVERY_CHECK, &mddev->recovery);
                 else if (cmd_match(page, "repair"))