1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/block/drbd/drbd_actlog.c b/drivers/block/drbd/drbd_actlog.c
index 6608076dc39e..28c73ca320a8 100644
--- a/drivers/block/drbd/drbd_actlog.c
+++ b/drivers/block/drbd/drbd_actlog.c
@@ -659,6 +659,27 @@ void drbd_al_shrink(struct drbd_conf *mdev)
         wake_up(&mdev->al_wait);
 }
 
+int drbd_initialize_al(struct drbd_conf *mdev, void *buffer)
+{
+        struct al_transaction_on_disk *al = buffer;
+        struct drbd_md *md = &mdev->ldev->md;
+        sector_t al_base = md->md_offset + md->al_offset;
+        int al_size_4k = md->al_stripes * md->al_stripe_size_4k;
+        int i;
+
+        memset(al, 0, 4096);
+        al->magic = cpu_to_be32(DRBD_AL_MAGIC);
+        al->transaction_type = cpu_to_be16(AL_TR_INITIALIZED);
+        al->crc32c = cpu_to_be32(crc32c(0, al, 4096));
+
+        for (i = 0; i < al_size_4k; i++) {
+                int err = drbd_md_sync_page_io(mdev, mdev->ldev, al_base + i * 8, WRITE);
+                if (err)
+                        return err;
+        }
+        return 0;
+}
+
 static int w_update_odbm(struct drbd_work *w, int unused)
 {
         struct update_odbm_work *udw = container_of(w, struct update_odbm_work, w);