netdev - [PATCH 2/7] batman-adv: Treat NET_XMIT

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Message-Id: <20170125164303.14268-3-sw@simonwunderlich.de>
Date:   Wed, 25 Jan 2017 17:42:58 +0100
From:   Simon Wunderlich <sw@...onwunderlich.de>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, b.a.t.m.a.n@...ts.open-mesh.org,
        Gao Feng <gfree.wind@...il.com>,
        Sven Eckelmann <sven@...fation.org>,
        Simon Wunderlich <sw@...onwunderlich.de>
Subject: [PATCH 2/7] batman-adv: Treat NET_XMIT_CN as transmit successfully

From: Gao Feng <gfree.wind@...il.com>

The tc could return NET_XMIT_CN as one congestion notification, but
it does not mean the packet is lost. Other modules like ipvlan,
macvlan, and others treat NET_XMIT_CN as success too.

So batman-adv should add the NET_XMIT_CN check.

Signed-off-by: Gao Feng <gfree.wind@...il.com>
Signed-off-by: Sven Eckelmann <sven@...fation.org>
Signed-off-by: Simon Wunderlich <sw@...onwunderlich.de>
---
 net/batman-adv/distributed-arp-table.c |  3 ++-
 net/batman-adv/fragmentation.c         |  2 +-
 net/batman-adv/routing.c               | 10 +++++-----
 net/batman-adv/soft-interface.c        |  2 +-
 net/batman-adv/tp_meter.c              |  2 +-
 5 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c
index 49576c5a3fe3..3641765d55df 100644
--- a/net/batman-adv/distributed-arp-table.c
+++ b/net/batman-adv/distributed-arp-table.c
@@ -659,7 +659,8 @@ static bool batadv_dat_send_data(struct batadv_priv *bat_priv,
 		}
 
 		send_status = batadv_send_unicast_skb(tmp_skb, neigh_node);
-		if (send_status == NET_XMIT_SUCCESS) {
+		if (send_status == NET_XMIT_SUCCESS ||
+		    send_status == NET_XMIT_CN) {
 			/* count the sent packet */
 			switch (packet_subtype) {
 			case BATADV_P_DAT_DHT_GET:
diff --git a/net/batman-adv/fragmentation.c b/net/batman-adv/fragmentation.c
index 9c561e683f4b..52396160360b 100644
--- a/net/batman-adv/fragmentation.c
+++ b/net/batman-adv/fragmentation.c
@@ -509,7 +509,7 @@ int batadv_frag_send_packet(struct sk_buff *skb,
 		batadv_add_counter(bat_priv, BATADV_CNT_FRAG_TX_BYTES,
 				   skb_fragment->len + ETH_HLEN);
 		ret = batadv_send_unicast_skb(skb_fragment, neigh_node);
-		if (ret != NET_XMIT_SUCCESS) {
+		if (ret != NET_XMIT_SUCCESS && ret != NET_XMIT_CN) {
 			ret = NET_XMIT_DROP;
 			goto free_skb;
 		}
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index 6713bdf414cd..6b08b26da4d9 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -262,7 +262,7 @@ static int batadv_recv_my_icmp_packet(struct batadv_priv *bat_priv,
 		icmph->ttl = BATADV_TTL;
 
 		res = batadv_send_skb_to_orig(skb, orig_node, NULL);
-		if (res == NET_XMIT_SUCCESS)
+		if (res == NET_XMIT_SUCCESS || res == NET_XMIT_CN)
 			ret = NET_RX_SUCCESS;
 
 		/* skb was consumed */
@@ -330,7 +330,7 @@ static int batadv_recv_icmp_ttl_exceeded(struct batadv_priv *bat_priv,
 	icmp_packet->ttl = BATADV_TTL;
 
 	res = batadv_send_skb_to_orig(skb, orig_node, NULL);
-	if (res == NET_RX_SUCCESS)
+	if (res == NET_RX_SUCCESS || res == NET_XMIT_CN)
 		ret = NET_XMIT_SUCCESS;
 
 	/* skb was consumed */
@@ -424,7 +424,7 @@ int batadv_recv_icmp_packet(struct sk_buff *skb,
 
 	/* route it */
 	res = batadv_send_skb_to_orig(skb, orig_node, recv_if);
-	if (res == NET_XMIT_SUCCESS)
+	if (res == NET_XMIT_SUCCESS || res == NET_XMIT_CN)
 		ret = NET_RX_SUCCESS;
 
 	/* skb was consumed */
@@ -719,14 +719,14 @@ static int batadv_route_unicast_packet(struct sk_buff *skb,
 
 	len = skb->len;
 	res = batadv_send_skb_to_orig(skb, orig_node, recv_if);
-	if (res == NET_XMIT_SUCCESS)
+	if (res == NET_XMIT_SUCCESS || res == NET_XMIT_CN)
 		ret = NET_RX_SUCCESS;
 
 	/* skb was consumed */
 	skb = NULL;
 
 	/* translate transmit result into receive result */
-	if (res == NET_XMIT_SUCCESS) {
+	if (res == NET_XMIT_SUCCESS || res == NET_XMIT_CN) {
 		/* skb was transmitted and consumed */
 		batadv_inc_counter(bat_priv, BATADV_CNT_FORWARD);
 		batadv_add_counter(bat_priv, BATADV_CNT_FORWARD_BYTES,
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index 7b3494ae6ad9..60516bbb7e83 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -386,7 +386,7 @@ static int batadv_interface_tx(struct sk_buff *skb,
 			ret = batadv_send_skb_via_tt(bat_priv, skb, dst_hint,
 						     vid);
 		}
-		if (ret != NET_XMIT_SUCCESS)
+		if (ret != NET_XMIT_SUCCESS && ret != NET_XMIT_CN)
 			goto dropped_freed;
 	}
 
diff --git a/net/batman-adv/tp_meter.c b/net/batman-adv/tp_meter.c
index 981e8c5b07e9..c367c8316a82 100644
--- a/net/batman-adv/tp_meter.c
+++ b/net/batman-adv/tp_meter.c
@@ -615,7 +615,7 @@ static int batadv_tp_send_msg(struct batadv_tp_vars *tp_vars, const u8 *src,
 	batadv_tp_fill_prerandom(tp_vars, data, data_len);
 
 	r = batadv_send_skb_to_orig(skb, orig_node, NULL);
-	if (r == NET_XMIT_SUCCESS)
+	if (r == NET_XMIT_SUCCESS || r == NET_XMIT_CN)
 		return 0;
 
 	return BATADV_TP_REASON_CANT_SEND;
-- 
2.11.0