diff options
Diffstat (limited to 'drivers/block/drbd/drbd_main.c')
| -rw-r--r-- | drivers/block/drbd/drbd_main.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index 4da6f11cc82..2190064d59b 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -1387,6 +1387,17 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os, spin_unlock_irq(&mdev->req_lock); } + /* Became sync source. With protocol >= 96, we still need to send out + * the sync uuid now. Need to do that before any drbd_send_state, or + * the other side may go "paused sync" before receiving the sync uuids, + * which is unexpected. */ + if ((os.conn != C_SYNC_SOURCE && os.conn != C_PAUSED_SYNC_S) && + (ns.conn == C_SYNC_SOURCE || ns.conn == C_PAUSED_SYNC_S) && + mdev->agreed_pro_version >= 96 && get_ldev(mdev)) { + drbd_gen_and_send_sync_uuid(mdev); + put_ldev(mdev); + } + /* Do not change the order of the if above and the two below... */ if (os.pdsk == D_DISKLESS && ns.pdsk > D_DISKLESS) { /* attach on the peer */ drbd_send_uuids(mdev); @@ -1980,12 +1991,17 @@ int drbd_send_uuids_skip_initial_sync(struct drbd_conf *mdev) return _drbd_send_uuids(mdev, 8); } - -int drbd_send_sync_uuid(struct drbd_conf *mdev, u64 val) +int drbd_gen_and_send_sync_uuid(struct drbd_conf *mdev) { struct p_rs_uuid p; + u64 uuid; + + D_ASSERT(mdev->state.disk == D_UP_TO_DATE); - p.uuid = cpu_to_be64(val); + get_random_bytes(&uuid, sizeof(u64)); + drbd_uuid_set(mdev, UI_BITMAP, uuid); + drbd_md_sync(mdev); + p.uuid = cpu_to_be64(uuid); return drbd_send_cmd(mdev, USE_DATA_SOCKET, P_SYNC_UUID, (struct p_header80 *)&p, sizeof(p)); |