diff options
Diffstat (limited to 'drivers/block/drbd/drbd_worker.c')
| -rw-r--r-- | drivers/block/drbd/drbd_worker.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c index 2ff5fd4..6532a69 100644 --- a/drivers/block/drbd/drbd_worker.c +++ b/drivers/block/drbd/drbd_worker.c @@ -698,8 +698,8 @@ next_sector: /* adjust very last sectors, in case we are oddly sized */ if (sector + (size>>9) > capacity) size = (capacity-sector)<<9; - if (connection->agreed_pro_version >= 89 && - connection->csums_tfm) { + + if (device->use_csums) { switch (read_for_csum(peer_device, sector, size)) { case -EIO: /* Disk failure */ put_ldev(device); @@ -913,7 +913,7 @@ int drbd_resync_finished(struct drbd_device *device) if (os.conn == C_SYNC_TARGET || os.conn == C_PAUSED_SYNC_T) khelper_cmd = "after-resync-target"; - if (first_peer_device(device)->connection->csums_tfm && device->rs_total) { + if (device->use_csums && device->rs_total) { const unsigned long s = device->rs_same_csum; const unsigned long t = device->rs_total; const int ratio = @@ -1622,6 +1622,18 @@ static void do_start_resync(struct drbd_device *device) clear_bit(AHEAD_TO_SYNC_SOURCE, &device->flags); } +static bool use_checksum_based_resync(struct drbd_connection *connection, struct drbd_device *device) +{ + bool csums_after_crash_only; + rcu_read_lock(); + csums_after_crash_only = rcu_dereference(connection->net_conf)->csums_after_crash_only; + rcu_read_unlock(); + return connection->agreed_pro_version >= 89 && /* supported? */ + connection->csums_tfm && /* configured? */ + (csums_after_crash_only == 0 /* use for each resync? */ + || test_bit(CRASHED_PRIMARY, &device->flags)); /* or only after Primary crash? */ +} + /** * drbd_start_resync() - Start the resync process * @device: DRBD device. @@ -1756,8 +1768,12 @@ void drbd_start_resync(struct drbd_device *device, enum drbd_conns side) drbd_conn_str(ns.conn), (unsigned long) device->rs_total << (BM_BLOCK_SHIFT-10), (unsigned long) device->rs_total); - if (side == C_SYNC_TARGET) + if (side == C_SYNC_TARGET) { device->bm_resync_fo = 0; + device->use_csums = use_checksum_based_resync(connection, device); + } else { + device->use_csums = 0; + } /* Since protocol 96, we must serialize drbd_gen_and_send_sync_uuid * with w_send_oos, or the sync target will get confused as to |