batman-adv: Fragment and send skbs larger than mtu
Non-broadcast packets larger than MTU are fragmented and sent with
an encapsulating header. Up to 16 fragments are supported, which are
sent in reverse order on the wire to allow minimal memory copying when
creating fragments.
Signed-off-by: Martin Hundebøll <martin@hundeboll.net>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index 5a2cc7a..d517d5d 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -300,6 +300,8 @@
* @BATADV_CNT_MGMT_TX_BYTES: transmitted routing protocol traffic bytes counter
* @BATADV_CNT_MGMT_RX: received routing protocol traffic packet counter
* @BATADV_CNT_MGMT_RX_BYTES: received routing protocol traffic bytes counter
+ * @BATADV_CNT_FRAG_TX: transmitted fragment traffic packet counter
+ * @BATADV_CNT_FRAG_TX_BYTES: transmitted fragment traffic bytes counter
* @BATADV_CNT_FRAG_RX: received fragment traffic packet counter
* @BATADV_CNT_FRAG_RX_BYTES: received fragment traffic bytes counter
* @BATADV_CNT_FRAG_FWD: forwarded fragment traffic packet counter
@@ -341,6 +343,8 @@
BATADV_CNT_MGMT_TX_BYTES,
BATADV_CNT_MGMT_RX,
BATADV_CNT_MGMT_RX_BYTES,
+ BATADV_CNT_FRAG_TX,
+ BATADV_CNT_FRAG_TX_BYTES,
BATADV_CNT_FRAG_RX,
BATADV_CNT_FRAG_RX_BYTES,
BATADV_CNT_FRAG_FWD,
@@ -542,6 +546,7 @@
* @aggregated_ogms: bool indicating whether OGM aggregation is enabled
* @bonding: bool indicating whether traffic bonding is enabled
* @fragmentation: bool indicating whether traffic fragmentation is enabled
+ * @frag_seqno: incremental counter to identify chains of egress fragments
* @ap_isolation: bool indicating whether ap isolation is enabled
* @bridge_loop_avoidance: bool indicating whether bridge loop avoidance is
* enabled
@@ -585,6 +590,7 @@
atomic_t aggregated_ogms;
atomic_t bonding;
atomic_t fragmentation;
+ atomic_t frag_seqno;
atomic_t ap_isolation;
#ifdef CONFIG_BATMAN_ADV_BLA
atomic_t bridge_loop_avoidance;
