drbd: Four new configuration settings for resync speed control

To reasonably control resync speed over drbd-proxy connections,
drbd has to measure the current delay of packets transmitted over
the (possibly congested) data socket vs the meta-data socket.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

2 files changed, 20 insertions, 0 deletions

diff --git a/include/linux/drbd_limits.h b/include/linux/drbd_limits.h
index 51f47a586ad8..440b42e38e89 100644
--- a/include/linux/drbd_limits.h
+++ b/include/linux/drbd_limits.h
@@ -133,5 +133,21 @@
 #define DRBD_MAX_BIO_BVECS_MAX 128
 #define DRBD_MAX_BIO_BVECS_DEF 0
 
+#define DRBD_DP_VOLUME_MIN 4
+#define DRBD_DP_VOLUME_MAX 1048576
+#define DRBD_DP_VOLUME_DEF 16384
+
+#define DRBD_DP_INTERVAL_MIN 1
+#define DRBD_DP_INTERVAL_MAX 600
+#define DRBD_DP_INTERVAL_DEF 5
+
+#define DRBD_RS_THROTTLE_TH_MIN 1
+#define DRBD_RS_THROTTLE_TH_MAX 600
+#define DRBD_RS_THROTTLE_TH_DEF 20
+
+#define DRBD_RS_HOLD_OFF_TH_MIN 1
+#define DRBD_RS_HOLD_OFF_TH_MAX 6000
+#define DRBD_RS_HOLD_OFF_TH_DEF 100
+
 #undef RANGE
 #endif
diff --git a/include/linux/drbd_nl.h b/include/linux/drbd_nl.h
index de055c07c2ba..ce77a746fc9d 100644
--- a/include/linux/drbd_nl.h
+++ b/include/linux/drbd_nl.h
@@ -78,6 +78,10 @@ NL_PACKET(syncer_conf, 8,
         NL_INTEGER(     30,     T_MAY_IGNORE,   rate)
         NL_INTEGER(     31,     T_MAY_IGNORE,   after)
         NL_INTEGER(     32,     T_MAY_IGNORE,   al_extents)
+        NL_INTEGER(     71,     T_MAY_IGNORE,   dp_volume)
+        NL_INTEGER(     72,     T_MAY_IGNORE,   dp_interval)
+        NL_INTEGER(     73,     T_MAY_IGNORE,   throttle_th)
+        NL_INTEGER(     74,     T_MAY_IGNORE,   hold_off_th)
         NL_STRING(      52,     T_MAY_IGNORE,   verify_alg,     SHARED_SECRET_MAX)
         NL_STRING(      51,     T_MAY_IGNORE,   cpu_mask,       32)
         NL_STRING(      64,     T_MAY_IGNORE,   csums_alg,      SHARED_SECRET_MAX)