[B.A.T.M.A.N.] pull request: batman-adv 2012-04-18

[B.A.T.M.A.N.] pull request: batman-adv 2012-04-18

[Antonio Quartulli]

Hello David,

this is the fixed version of my previous pull request (issued on 2012-04-17).
In this patchset the issues you reported have been fixed; moreover I'm
also including two new patches (1/13 and 2/13) which are respectively:

1/13) a fix for Al Viro's report about the missing htons()
2/13) a fix for a wrongly duplicated line in a comment

The following changes since commit ecffe75f934b4e3c5301fe5db278068e0efb0d6b:

  hippi: fix printk format in rrunner.c (2012-04-16 23:48:38 -0400)

are available in the git repository at:

  git://git.open-mesh.org/linux-merge.git tags/batman-adv-for-davem

for you to fetch changes up to 1e5cc266dbc401d11aefb966ad35e651c2f67414:

  batman-adv: skip the window protection test when the originator has no neighbours (2012-04-18 09:54:02 +0200)

----------------------------------------------------------------
Included changes:
* remove duplicated line in comment
* add htons() invocation for tt_crc as suggested by Al Viro
* OriGinator Message seqno initial value is now random
* some cleanups and fixes

----------------------------------------------------------------
Antonio Quartulli (5):
      batman-adv: convert the tt_crc to network order
      batman-adv: remove duplicated line in comment
      batman-adv: use ETH_HLEN instead of sizeof(struct ethhdr)
      batman-adv: print OGM seq numbers as unsigned int
      batman-adv: skip the window protection test when the originator has no neighbours

Marek Lindner (8):
      batman-adv: move ogm initialization into the proper function
      batman-adv: refactoring API: find generalized name for bat_ogm_init callback
      batman-adv: randomize initial seqno to avoid collision
      batman-adv: add iface_disable() callback to routing API
      batman-adv: handle routing code initialization properly
      batman-adv: refactoring API: find generalized name for bat_ogm_init_primary callback
      batman-adv: rename BATMAN_OGM_LEN to BATMAN_OGM_HLEN
      batman-adv: mark existing ogm variables as batman iv

 net/batman-adv/bat_iv_ogm.c            |   63 +++++++++++++++++++++-----------
 net/batman-adv/bridge_loop_avoidance.c |   11 ++----
 net/batman-adv/hard-interface.c        |   33 +++++++++--------
 net/batman-adv/icmp_socket.c           |    4 +-
 net/batman-adv/main.c                  |    5 ++-
 net/batman-adv/packet.h                |    6 +--
 net/batman-adv/routing.c               |   10 ++---
 net/batman-adv/send.c                  |   14 +++----
 net/batman-adv/soft-interface.c        |    2 +-
 net/batman-adv/translation-table.c     |    2 +-
 net/batman-adv/types.h                 |   12 +++---
 net/batman-adv/vis.c                   |    8 ++--
 12 files changed, 96 insertions(+), 74 deletions(-)

[B.A.T.M.A.N.] [PATCH 01/13] batman-adv: convert the tt_crc to network order

[Antonio Quartulli]

Before sending out a TT_Request packet we must convert the tt_crc field value
to network order (since it is 16bits long).

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
---
 net/batman-adv/translation-table.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index e16a369..a38d315 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -1339,7 +1339,7 @@ static int send_tt_request(struct bat_priv *bat_priv,
 	memcpy(tt_request->dst, dst_orig_node->orig, ETH_ALEN);
 	tt_request->header.ttl = TTL;
 	tt_request->ttvn = ttvn;
-	tt_request->tt_data = tt_crc;
+	tt_request->tt_data = htons(tt_crc);
 	tt_request->flags = TT_REQUEST;
 
 	if (full_table)
-- 
1.7.9.4

[B.A.T.M.A.N.] [PATCH 02/13] batman-adv: remove duplicated line in comment

[Antonio Quartulli]

Remove an accidentally added duplicated line in a function comment

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
---
 net/batman-adv/bridge_loop_avoidance.c |    1 -
 1 file changed, 1 deletion(-)

diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c
index 1cf18ac..c8642b5 100644
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -735,7 +735,6 @@ static int handle_claim(struct bat_priv *bat_priv,
 
 /**
  * @bat_priv: the bat priv with all the soft interface information
- * @bat_priv: the bat priv with all the soft interface information
  * @hw_src: the Hardware source in the ARP Header
  * @hw_dst: the Hardware destination in the ARP Header
  * @ethhdr: pointer to the Ethernet header of the claim frame
-- 
1.7.9.4

[B.A.T.M.A.N.] [PATCH 03/13] batman-adv: move ogm initialization into the proper function

[Antonio Quartulli]

From: Marek Lindner <lindner_marek@yahoo.de>

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
---
 net/batman-adv/hard-interface.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index 8c4b790..f152007 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -332,7 +332,6 @@ int hardif_enable_interface(struct hard_iface *hard_iface,
 	hard_iface->batman_adv_ptype.dev = hard_iface->net_dev;
 	dev_add_pack(&hard_iface->batman_adv_ptype);
 
-	atomic_set(&hard_iface->seqno, 1);
 	atomic_set(&hard_iface->frag_seqno, 1);
 	bat_info(hard_iface->soft_iface, "Adding interface: %s\n",
 		 hard_iface->net_dev->name);
@@ -451,6 +450,13 @@ static struct hard_iface *hardif_add_interface(struct net_device *net_dev)
 	check_known_mac_addr(hard_iface->net_dev);
 	list_add_tail_rcu(&hard_iface->list, &hardif_list);
 
+	/**
+	 * This can't be called via a bat_priv callback because
+	 * we have no bat_priv yet.
+	 */
+	atomic_set(&hard_iface->seqno, 1);
+	hard_iface->packet_buff = NULL;
+
 	return hard_iface;
 
 free_if:
-- 
1.7.9.4

[B.A.T.M.A.N.] [PATCH 04/13] batman-adv: refactoring API: find generalized name for bat_ogm_init callback

[Antonio Quartulli]

From: Marek Lindner <lindner_marek@yahoo.de>

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
---
 net/batman-adv/bat_iv_ogm.c     |    4 ++--
 net/batman-adv/hard-interface.c |    2 +-
 net/batman-adv/main.c           |    2 +-
 net/batman-adv/types.h          |    4 ++--
 4 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index fab1071..117b831 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -30,7 +30,7 @@
 #include "send.h"
 #include "bat_algo.h"
 
-static void bat_iv_ogm_init(struct hard_iface *hard_iface)
+static void bat_iv_ogm_iface_enable(struct hard_iface *hard_iface)
 {
 	struct batman_ogm_packet *batman_ogm_packet;
 
@@ -1169,7 +1169,7 @@ static void bat_iv_ogm_receive(struct hard_iface *if_incoming,
 
 static struct bat_algo_ops batman_iv __read_mostly = {
 	.name = "BATMAN IV",
-	.bat_ogm_init = bat_iv_ogm_init,
+	.bat_iface_enable = bat_iv_ogm_iface_enable,
 	.bat_ogm_init_primary = bat_iv_ogm_init_primary,
 	.bat_ogm_update_mac = bat_iv_ogm_update_mac,
 	.bat_ogm_schedule = bat_iv_ogm_schedule,
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index f152007..4d9b85d 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -312,7 +312,7 @@ int hardif_enable_interface(struct hard_iface *hard_iface,
 	hard_iface->soft_iface = soft_iface;
 	bat_priv = netdev_priv(hard_iface->soft_iface);
 
-	bat_priv->bat_algo_ops->bat_ogm_init(hard_iface);
+	bat_priv->bat_algo_ops->bat_iface_enable(hard_iface);
 
 	if (!hard_iface->packet_buff) {
 		bat_err(hard_iface->soft_iface,
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index e67ca96..ca8f395 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -208,7 +208,7 @@ int bat_algo_register(struct bat_algo_ops *bat_algo_ops)
 	}
 
 	/* all algorithms must implement all ops (for now) */
-	if (!bat_algo_ops->bat_ogm_init ||
+	if (!bat_algo_ops->bat_iface_enable ||
 	    !bat_algo_ops->bat_ogm_init_primary ||
 	    !bat_algo_ops->bat_ogm_update_mac ||
 	    !bat_algo_ops->bat_ogm_schedule ||
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index a5b1a63..4b92248 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -377,8 +377,8 @@ struct recvlist_node {
 struct bat_algo_ops {
 	struct hlist_node list;
 	char *name;
-	/* init OGM when hard-interface is enabled */
-	void (*bat_ogm_init)(struct hard_iface *hard_iface);
+	/* init routing info when hard-interface is enabled */
+	void (*bat_iface_enable)(struct hard_iface *hard_iface);
 	/* init primary OGM when primary interface is selected */
 	void (*bat_ogm_init_primary)(struct hard_iface *hard_iface);
 	/* init mac addresses of the OGM belonging to this hard-interface */
-- 
1.7.9.4

[B.A.T.M.A.N.] [PATCH 05/13] batman-adv: randomize initial seqno to avoid collision

[Antonio Quartulli]

From: Marek Lindner <lindner_marek@yahoo.de>

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
---
 net/batman-adv/bat_iv_ogm.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index 117b831..95bfc59 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -33,6 +33,11 @@
 static void bat_iv_ogm_iface_enable(struct hard_iface *hard_iface)
 {
 	struct batman_ogm_packet *batman_ogm_packet;
+	uint32_t random_seqno;
+
+	/* randomize initial seqno to avoid collision */
+	get_random_bytes(&random_seqno, sizeof(random_seqno));
+	atomic_set(&hard_iface->seqno, random_seqno);
 
 	hard_iface->packet_len = BATMAN_OGM_LEN;
 	hard_iface->packet_buff = kmalloc(hard_iface->packet_len, GFP_ATOMIC);
-- 
1.7.9.4

[B.A.T.M.A.N.] [PATCH 06/13] batman-adv: add iface_disable() callback to routing API

[Antonio Quartulli]

From: Marek Lindner <lindner_marek@yahoo.de>

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
---
 net/batman-adv/bat_iv_ogm.c     |    7 +++++++
 net/batman-adv/hard-interface.c |    3 +--
 net/batman-adv/main.c           |    1 +
 net/batman-adv/types.h          |    2 ++
 4 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index 95bfc59..4cc66db 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -52,6 +52,12 @@ static void bat_iv_ogm_iface_enable(struct hard_iface *hard_iface)
 	batman_ogm_packet->ttvn = 0;
 }
 
+static void bat_iv_ogm_iface_disable(struct hard_iface *hard_iface)
+{
+	kfree(hard_iface->packet_buff);
+	hard_iface->packet_buff = NULL;
+}
+
 static void bat_iv_ogm_init_primary(struct hard_iface *hard_iface)
 {
 	struct batman_ogm_packet *batman_ogm_packet;
@@ -1175,6 +1181,7 @@ static void bat_iv_ogm_receive(struct hard_iface *if_incoming,
 static struct bat_algo_ops batman_iv __read_mostly = {
 	.name = "BATMAN IV",
 	.bat_iface_enable = bat_iv_ogm_iface_enable,
+	.bat_iface_disable = bat_iv_ogm_iface_disable,
 	.bat_ogm_init_primary = bat_iv_ogm_init_primary,
 	.bat_ogm_update_mac = bat_iv_ogm_update_mac,
 	.bat_ogm_schedule = bat_iv_ogm_schedule,
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index 4d9b85d..fd9715e 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -397,8 +397,7 @@ void hardif_disable_interface(struct hard_iface *hard_iface)
 			hardif_free_ref(new_if);
 	}
 
-	kfree(hard_iface->packet_buff);
-	hard_iface->packet_buff = NULL;
+	bat_priv->bat_algo_ops->bat_iface_disable(hard_iface);
 	hard_iface->if_status = IF_NOT_IN_USE;
 
 	/* delete all references to this hard_iface */
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index ca8f395..a47a6ce 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -209,6 +209,7 @@ int bat_algo_register(struct bat_algo_ops *bat_algo_ops)
 
 	/* all algorithms must implement all ops (for now) */
 	if (!bat_algo_ops->bat_iface_enable ||
+	    !bat_algo_ops->bat_iface_disable ||
 	    !bat_algo_ops->bat_ogm_init_primary ||
 	    !bat_algo_ops->bat_ogm_update_mac ||
 	    !bat_algo_ops->bat_ogm_schedule ||
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index 4b92248..b034cf2 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -379,6 +379,8 @@ struct bat_algo_ops {
 	char *name;
 	/* init routing info when hard-interface is enabled */
 	void (*bat_iface_enable)(struct hard_iface *hard_iface);
+	/* de-init routing info when hard-interface is disabled */
+	void (*bat_iface_disable)(struct hard_iface *hard_iface);
 	/* init primary OGM when primary interface is selected */
 	void (*bat_ogm_init_primary)(struct hard_iface *hard_iface);
 	/* init mac addresses of the OGM belonging to this hard-interface */
-- 
1.7.9.4

[B.A.T.M.A.N.] [PATCH 07/13] batman-adv: handle routing code initialization properly

[Antonio Quartulli]

From: Marek Lindner <lindner_marek@yahoo.de>

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
---
 net/batman-adv/bat_iv_ogm.c     |   11 ++++++++++-
 net/batman-adv/hard-interface.c |   15 ++++++---------
 net/batman-adv/types.h          |    2 +-
 3 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index 4cc66db..2714670 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -30,10 +30,11 @@
 #include "send.h"
 #include "bat_algo.h"
 
-static void bat_iv_ogm_iface_enable(struct hard_iface *hard_iface)
+static int bat_iv_ogm_iface_enable(struct hard_iface *hard_iface)
 {
 	struct batman_ogm_packet *batman_ogm_packet;
 	uint32_t random_seqno;
+	int res = -1;
 
 	/* randomize initial seqno to avoid collision */
 	get_random_bytes(&random_seqno, sizeof(random_seqno));
@@ -42,6 +43,9 @@ static void bat_iv_ogm_iface_enable(struct hard_iface *hard_iface)
 	hard_iface->packet_len = BATMAN_OGM_LEN;
 	hard_iface->packet_buff = kmalloc(hard_iface->packet_len, GFP_ATOMIC);
 
+	if (!hard_iface->packet_buff)
+		goto out;
+
 	batman_ogm_packet = (struct batman_ogm_packet *)hard_iface->packet_buff;
 	batman_ogm_packet->header.packet_type = BAT_OGM;
 	batman_ogm_packet->header.version = COMPAT_VERSION;
@@ -50,6 +54,11 @@ static void bat_iv_ogm_iface_enable(struct hard_iface *hard_iface)
 	batman_ogm_packet->tq = TQ_MAX_VALUE;
 	batman_ogm_packet->tt_num_changes = 0;
 	batman_ogm_packet->ttvn = 0;
+
+	res = 0;
+
+out:
+	return res;
 }
 
 static void bat_iv_ogm_iface_disable(struct hard_iface *hard_iface)
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index fd9715e..3b391fd 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -304,22 +304,17 @@ int hardif_enable_interface(struct hard_iface *hard_iface,
 	if (!softif_is_valid(soft_iface)) {
 		pr_err("Can't create batman mesh interface %s: already exists as regular interface\n",
 		       soft_iface->name);
-		dev_put(soft_iface);
 		ret = -EINVAL;
-		goto err;
+		goto err_dev;
 	}
 
 	hard_iface->soft_iface = soft_iface;
 	bat_priv = netdev_priv(hard_iface->soft_iface);
 
-	bat_priv->bat_algo_ops->bat_iface_enable(hard_iface);
-
-	if (!hard_iface->packet_buff) {
-		bat_err(hard_iface->soft_iface,
-			"Can't add interface packet (%s): out of memory\n",
-			hard_iface->net_dev->name);
+	ret = bat_priv->bat_algo_ops->bat_iface_enable(hard_iface);
+	if (ret < 0) {
 		ret = -ENOMEM;
-		goto err;
+		goto err_dev;
 	}
 
 	hard_iface->if_num = bat_priv->num_ifaces;
@@ -363,6 +358,8 @@ int hardif_enable_interface(struct hard_iface *hard_iface,
 out:
 	return 0;
 
+err_dev:
+	dev_put(soft_iface);
 err:
 	hardif_free_ref(hard_iface);
 	return ret;
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index b034cf2..dd78023 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -378,7 +378,7 @@ struct bat_algo_ops {
 	struct hlist_node list;
 	char *name;
 	/* init routing info when hard-interface is enabled */
-	void (*bat_iface_enable)(struct hard_iface *hard_iface);
+	int (*bat_iface_enable)(struct hard_iface *hard_iface);
 	/* de-init routing info when hard-interface is disabled */
 	void (*bat_iface_disable)(struct hard_iface *hard_iface);
 	/* init primary OGM when primary interface is selected */
-- 
1.7.9.4

[B.A.T.M.A.N.] [PATCH 08/13] batman-adv: refactoring API: find generalized name for bat_ogm_init_primary callback

[Antonio Quartulli]

From: Marek Lindner <lindner_marek@yahoo.de>

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
---
 net/batman-adv/bat_iv_ogm.c     |    4 ++--
 net/batman-adv/hard-interface.c |    2 +-
 net/batman-adv/main.c           |    2 +-
 net/batman-adv/types.h          |    4 ++--
 4 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index 2714670..c0bdb90 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -67,7 +67,7 @@ static void bat_iv_ogm_iface_disable(struct hard_iface *hard_iface)
 	hard_iface->packet_buff = NULL;
 }
 
-static void bat_iv_ogm_init_primary(struct hard_iface *hard_iface)
+static void bat_iv_ogm_primary_iface_set(struct hard_iface *hard_iface)
 {
 	struct batman_ogm_packet *batman_ogm_packet;
 
@@ -1191,7 +1191,7 @@ static struct bat_algo_ops batman_iv __read_mostly = {
 	.name = "BATMAN IV",
 	.bat_iface_enable = bat_iv_ogm_iface_enable,
 	.bat_iface_disable = bat_iv_ogm_iface_disable,
-	.bat_ogm_init_primary = bat_iv_ogm_init_primary,
+	.bat_primary_iface_set = bat_iv_ogm_primary_iface_set,
 	.bat_ogm_update_mac = bat_iv_ogm_update_mac,
 	.bat_ogm_schedule = bat_iv_ogm_schedule,
 	.bat_ogm_emit = bat_iv_ogm_emit,
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index 3b391fd..75a555b 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -146,7 +146,7 @@ static void primary_if_select(struct bat_priv *bat_priv,
 	if (!new_hard_iface)
 		goto out;
 
-	bat_priv->bat_algo_ops->bat_ogm_init_primary(new_hard_iface);
+	bat_priv->bat_algo_ops->bat_primary_iface_set(new_hard_iface);
 	primary_if_update_addr(bat_priv, curr_hard_iface);
 
 out:
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index a47a6ce..7913272 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -210,7 +210,7 @@ int bat_algo_register(struct bat_algo_ops *bat_algo_ops)
 	/* all algorithms must implement all ops (for now) */
 	if (!bat_algo_ops->bat_iface_enable ||
 	    !bat_algo_ops->bat_iface_disable ||
-	    !bat_algo_ops->bat_ogm_init_primary ||
+	    !bat_algo_ops->bat_primary_iface_set ||
 	    !bat_algo_ops->bat_ogm_update_mac ||
 	    !bat_algo_ops->bat_ogm_schedule ||
 	    !bat_algo_ops->bat_ogm_emit ||
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index dd78023..4d93aad 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -381,8 +381,8 @@ struct bat_algo_ops {
 	int (*bat_iface_enable)(struct hard_iface *hard_iface);
 	/* de-init routing info when hard-interface is disabled */
 	void (*bat_iface_disable)(struct hard_iface *hard_iface);
-	/* init primary OGM when primary interface is selected */
-	void (*bat_ogm_init_primary)(struct hard_iface *hard_iface);
+	/* called when primary interface is selected / changed */
+	void (*bat_primary_iface_set)(struct hard_iface *hard_iface);
 	/* init mac addresses of the OGM belonging to this hard-interface */
 	void (*bat_ogm_update_mac)(struct hard_iface *hard_iface);
 	/* prepare a new outgoing OGM for the send queue */
-- 
1.7.9.4

[B.A.T.M.A.N.] [PATCH 09/13] batman-adv: rename BATMAN_OGM_LEN to BATMAN_OGM_HLEN

[Antonio Quartulli]

From: Marek Lindner <lindner_marek@yahoo.de>

Using BATMAN_OGM_LEN leaves one with the impression that this is
the full packet size which is not the case. Therefore the variable
is renamed.

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
---
 net/batman-adv/bat_iv_ogm.c |   12 ++++++------
 net/batman-adv/packet.h     |    2 +-
 net/batman-adv/routing.c    |    2 +-
 net/batman-adv/send.c       |   12 ++++++------
 4 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index c0bdb90..a2af289 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -40,7 +40,7 @@ static int bat_iv_ogm_iface_enable(struct hard_iface *hard_iface)
 	get_random_bytes(&random_seqno, sizeof(random_seqno));
 	atomic_set(&hard_iface->seqno, random_seqno);
 
-	hard_iface->packet_len = BATMAN_OGM_LEN;
+	hard_iface->packet_len = BATMAN_OGM_HLEN;
 	hard_iface->packet_buff = kmalloc(hard_iface->packet_len, GFP_ATOMIC);
 
 	if (!hard_iface->packet_buff)
@@ -112,7 +112,7 @@ static uint8_t hop_penalty(uint8_t tq, const struct bat_priv *bat_priv)
 static int bat_iv_ogm_aggr_packet(int buff_pos, int packet_len,
 				  int tt_num_changes)
 {
-	int next_buff_pos = buff_pos + BATMAN_OGM_LEN + tt_len(tt_num_changes);
+	int next_buff_pos = buff_pos + BATMAN_OGM_HLEN + tt_len(tt_num_changes);
 
 	return (next_buff_pos <= packet_len) &&
 		(next_buff_pos <= MAX_AGGREGATION_BYTES);
@@ -162,7 +162,7 @@ static void bat_iv_ogm_send_to_if(struct forw_packet *forw_packet,
 			batman_ogm_packet->ttvn, hard_iface->net_dev->name,
 			hard_iface->net_dev->dev_addr);
 
-		buff_pos += BATMAN_OGM_LEN +
+		buff_pos += BATMAN_OGM_HLEN +
 				tt_len(batman_ogm_packet->tt_num_changes);
 		packet_num++;
 		batman_ogm_packet = (struct batman_ogm_packet *)
@@ -540,7 +540,7 @@ static void bat_iv_ogm_forward(struct orig_node *orig_node,
 		batman_ogm_packet->flags &= ~DIRECTLINK;
 
 	bat_iv_ogm_queue_add(bat_priv, (unsigned char *)batman_ogm_packet,
-			     BATMAN_OGM_LEN + tt_len(tt_num_changes),
+			     BATMAN_OGM_HLEN + tt_len(tt_num_changes),
 			     if_incoming, 0, bat_iv_ogm_fwd_send_time());
 }
 
@@ -1173,12 +1173,12 @@ static void bat_iv_ogm_receive(struct hard_iface *if_incoming,
 		batman_ogm_packet->seqno = ntohl(batman_ogm_packet->seqno);
 		batman_ogm_packet->tt_crc = ntohs(batman_ogm_packet->tt_crc);
 
-		tt_buff = packet_buff + buff_pos + BATMAN_OGM_LEN;
+		tt_buff = packet_buff + buff_pos + BATMAN_OGM_HLEN;
 
 		bat_iv_ogm_process(ethhdr, batman_ogm_packet,
 				   tt_buff, if_incoming);
 
-		buff_pos += BATMAN_OGM_LEN +
+		buff_pos += BATMAN_OGM_HLEN +
 				tt_len(batman_ogm_packet->tt_num_changes);
 
 		batman_ogm_packet = (struct batman_ogm_packet *)
diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h
index 59800e8..59dec0a 100644
--- a/net/batman-adv/packet.h
+++ b/net/batman-adv/packet.h
@@ -126,7 +126,7 @@ struct batman_ogm_packet {
 	uint16_t tt_crc;
 } __packed;
 
-#define BATMAN_OGM_LEN sizeof(struct batman_ogm_packet)
+#define BATMAN_OGM_HLEN sizeof(struct batman_ogm_packet)
 
 struct icmp_packet {
 	struct batman_header header;
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index 78eddc9..ac13a6a 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -254,7 +254,7 @@ int recv_bat_ogm_packet(struct sk_buff *skb, struct hard_iface *hard_iface)
 	struct ethhdr *ethhdr;
 
 	/* drop packet if it has not necessary minimum size */
-	if (unlikely(!pskb_may_pull(skb, BATMAN_OGM_LEN)))
+	if (unlikely(!pskb_may_pull(skb, BATMAN_OGM_HLEN)))
 		return NET_RX_DROP;
 
 	ethhdr = (struct ethhdr *)skb_mac_header(skb);
diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c
index af7a674..b5f078c 100644
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@ -87,7 +87,7 @@ static void realloc_packet_buffer(struct hard_iface *hard_iface,
 	/* keep old buffer if kmalloc should fail */
 	if (new_buff) {
 		memcpy(new_buff, hard_iface->packet_buff,
-		       BATMAN_OGM_LEN);
+		       BATMAN_OGM_HLEN);
 
 		kfree(hard_iface->packet_buff);
 		hard_iface->packet_buff = new_buff;
@@ -101,13 +101,13 @@ static int prepare_packet_buffer(struct bat_priv *bat_priv,
 {
 	int new_len;
 
-	new_len = BATMAN_OGM_LEN +
+	new_len = BATMAN_OGM_HLEN +
 		  tt_len((uint8_t)atomic_read(&bat_priv->tt_local_changes));
 
 	/* if we have too many changes for one packet don't send any
 	 * and wait for the tt table request which will be fragmented */
 	if (new_len > hard_iface->soft_iface->mtu)
-		new_len = BATMAN_OGM_LEN;
+		new_len = BATMAN_OGM_HLEN;
 
 	realloc_packet_buffer(hard_iface, new_len);
 
@@ -117,14 +117,14 @@ static int prepare_packet_buffer(struct bat_priv *bat_priv,
 	atomic_set(&bat_priv->tt_ogm_append_cnt, TT_OGM_APPEND_MAX);
 
 	return tt_changes_fill_buffer(bat_priv,
-				      hard_iface->packet_buff + BATMAN_OGM_LEN,
-				      hard_iface->packet_len - BATMAN_OGM_LEN);
+				      hard_iface->packet_buff + BATMAN_OGM_HLEN,
+				      hard_iface->packet_len - BATMAN_OGM_HLEN);
 }
 
 static int reset_packet_buffer(struct bat_priv *bat_priv,
 				struct hard_iface *hard_iface)
 {
-	realloc_packet_buffer(hard_iface, BATMAN_OGM_LEN);
+	realloc_packet_buffer(hard_iface, BATMAN_OGM_HLEN);
 	return 0;
 }
 
-- 
1.7.9.4

[B.A.T.M.A.N.] [PATCH 10/13] batman-adv: mark existing ogm variables as batman iv

[Antonio Quartulli]

From: Marek Lindner <lindner_marek@yahoo.de>

The coming protocol changes also will have a part called "OGM". That
makes it necessary to introduce a distinction in the code base.

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
---
 net/batman-adv/bat_iv_ogm.c     |    4 ++--
 net/batman-adv/hard-interface.c |    2 +-
 net/batman-adv/packet.h         |    4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index a2af289..98f7182 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -47,7 +47,7 @@ static int bat_iv_ogm_iface_enable(struct hard_iface *hard_iface)
 		goto out;
 
 	batman_ogm_packet = (struct batman_ogm_packet *)hard_iface->packet_buff;
-	batman_ogm_packet->header.packet_type = BAT_OGM;
+	batman_ogm_packet->header.packet_type = BAT_IV_OGM;
 	batman_ogm_packet->header.version = COMPAT_VERSION;
 	batman_ogm_packet->header.ttl = 2;
 	batman_ogm_packet->flags = NO_FLAGS;
@@ -934,7 +934,7 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
 	 * packet in an aggregation.  Here we expect that the padding
 	 * is always zero (or not 0x01)
 	 */
-	if (batman_ogm_packet->header.packet_type != BAT_OGM)
+	if (batman_ogm_packet->header.packet_type != BAT_IV_OGM)
 		return;
 
 	/* could be changed by schedule_own_packet() */
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index 75a555b..e8c5da3 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -604,7 +604,7 @@ static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
 
 	switch (batman_ogm_packet->header.packet_type) {
 		/* batman originator packet */
-	case BAT_OGM:
+	case BAT_IV_OGM:
 		ret = recv_bat_ogm_packet(skb, hard_iface);
 		break;
 
diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h
index 59dec0a..f54969c 100644
--- a/net/batman-adv/packet.h
+++ b/net/batman-adv/packet.h
@@ -25,7 +25,7 @@
 #define ETH_P_BATMAN  0x4305	/* unofficial/not registered Ethertype */
 
 enum bat_packettype {
-	BAT_OGM		 = 0x01,
+	BAT_IV_OGM	 = 0x01,
 	BAT_ICMP	 = 0x02,
 	BAT_UNICAST	 = 0x03,
 	BAT_BCAST	 = 0x04,
@@ -38,7 +38,7 @@ enum bat_packettype {
 /* this file is included by batctl which needs these defines */
 #define COMPAT_VERSION 14
 
-enum batman_flags {
+enum batman_iv_flags {
 	PRIMARIES_FIRST_HOP = 1 << 4,
 	VIS_SERVER	    = 1 << 5,
 	DIRECTLINK	    = 1 << 6
-- 
1.7.9.4

[B.A.T.M.A.N.] [PATCH 11/13] batman-adv: use ETH_HLEN instead of sizeof(struct ethhdr)

[Antonio Quartulli]

Instead of using sizeof(struct ethhdr) it is strongly recommended to use the
kernel macro ETH_HLEN. This patch substitute each occurrence of the former
expressione with the latter one.

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
---
 net/batman-adv/bat_iv_ogm.c            |    7 +++----
 net/batman-adv/bridge_loop_avoidance.c |   10 ++++------
 net/batman-adv/hard-interface.c        |    3 +--
 net/batman-adv/icmp_socket.c           |    4 ++--
 net/batman-adv/routing.c               |    8 ++++----
 net/batman-adv/send.c                  |    2 +-
 net/batman-adv/soft-interface.c        |    2 +-
 net/batman-adv/types.h                 |    2 +-
 net/batman-adv/vis.c                   |    8 ++++----
 9 files changed, 21 insertions(+), 25 deletions(-)

diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index 98f7182..d7fa8af 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -355,10 +355,9 @@ static void bat_iv_ogm_aggregate_new(const unsigned char *packet_buff,
 	if ((atomic_read(&bat_priv->aggregated_ogms)) &&
 	    (packet_len < MAX_AGGREGATION_BYTES))
 		forw_packet_aggr->skb = dev_alloc_skb(MAX_AGGREGATION_BYTES +
-						      sizeof(struct ethhdr));
+						      ETH_HLEN);
 	else
-		forw_packet_aggr->skb = dev_alloc_skb(packet_len +
-						      sizeof(struct ethhdr));
+		forw_packet_aggr->skb = dev_alloc_skb(packet_len + ETH_HLEN);
 
 	if (!forw_packet_aggr->skb) {
 		if (!own_packet)
@@ -366,7 +365,7 @@ static void bat_iv_ogm_aggregate_new(const unsigned char *packet_buff,
 		kfree(forw_packet_aggr);
 		goto out;
 	}
-	skb_reserve(forw_packet_aggr->skb, sizeof(struct ethhdr));
+	skb_reserve(forw_packet_aggr->skb, ETH_HLEN);
 
 	INIT_HLIST_NODE(&forw_packet_aggr->list);
 
diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c
index c8642b5..ad394c6 100644
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -290,9 +290,7 @@ static void bla_send_claim(struct bat_priv *bat_priv, uint8_t *mac,
 		goto out;
 
 	ethhdr = (struct ethhdr *)skb->data;
-	hw_src = (uint8_t *)ethhdr +
-		 sizeof(struct ethhdr) +
-		 sizeof(struct arphdr);
+	hw_src = (uint8_t *)ethhdr + ETH_HLEN + sizeof(struct arphdr);
 
 	/* now we pretend that the client would have sent this ... */
 	switch (claimtype) {
@@ -340,7 +338,7 @@ static void bla_send_claim(struct bat_priv *bat_priv, uint8_t *mac,
 	skb_reset_mac_header(skb);
 	skb->protocol = eth_type_trans(skb, soft_iface);
 	bat_priv->stats.rx_packets++;
-	bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr);
+	bat_priv->stats.rx_bytes += skb->len + ETH_HLEN;
 	soft_iface->last_rx = jiffies;
 
 	netif_rx(skb);
@@ -844,7 +842,7 @@ static int bla_process_claim(struct bat_priv *bat_priv,
 		headlen = sizeof(*vhdr);
 	} else {
 		proto = ntohs(ethhdr->h_proto);
-		headlen = sizeof(*ethhdr);
+		headlen = ETH_HLEN;
 	}
 
 	if (proto != ETH_P_ARP)
@@ -1302,7 +1300,7 @@ int bla_is_backbone_gw(struct sk_buff *skb,
 		return 0;
 
 	/* first, find out the vid. */
-	if (!pskb_may_pull(skb, hdr_size + sizeof(struct ethhdr)))
+	if (!pskb_may_pull(skb, hdr_size + ETH_HLEN))
 		return 0;
 
 	ethhdr = (struct ethhdr *)(((uint8_t *)skb->data) + hdr_size);
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index e8c5da3..47c79d7 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -574,8 +574,7 @@ static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
 		goto err_free;
 
 	/* expect a valid ethernet header here. */
-	if (unlikely(skb->mac_len != sizeof(struct ethhdr) ||
-		     !skb_mac_header(skb)))
+	if (unlikely(skb->mac_len != ETH_HLEN || !skb_mac_header(skb)))
 		goto err_free;
 
 	if (!hard_iface->soft_iface)
diff --git a/net/batman-adv/icmp_socket.c b/net/batman-adv/icmp_socket.c
index b87518e..2e98a57 100644
--- a/net/batman-adv/icmp_socket.c
+++ b/net/batman-adv/icmp_socket.c
@@ -175,13 +175,13 @@ static ssize_t bat_socket_write(struct file *file, const char __user *buff,
 	if (len >= sizeof(struct icmp_packet_rr))
 		packet_len = sizeof(struct icmp_packet_rr);
 
-	skb = dev_alloc_skb(packet_len + sizeof(struct ethhdr));
+	skb = dev_alloc_skb(packet_len + ETH_HLEN);
 	if (!skb) {
 		len = -ENOMEM;
 		goto out;
 	}
 
-	skb_reserve(skb, sizeof(struct ethhdr));
+	skb_reserve(skb, ETH_HLEN);
 	icmp_packet = (struct icmp_packet_rr *)skb_put(skb, packet_len);
 
 	if (copy_from_user(icmp_packet, buff, packet_len)) {
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index ac13a6a..ff56086 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -313,7 +313,7 @@ static int recv_my_icmp_packet(struct bat_priv *bat_priv,
 		goto out;
 
 	/* create a copy of the skb, if needed, to modify it. */
-	if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
+	if (skb_cow(skb, ETH_HLEN) < 0)
 		goto out;
 
 	icmp_packet = (struct icmp_packet_rr *)skb->data;
@@ -368,7 +368,7 @@ static int recv_icmp_ttl_exceeded(struct bat_priv *bat_priv,
 		goto out;
 
 	/* create a copy of the skb, if needed, to modify it. */
-	if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
+	if (skb_cow(skb, ETH_HLEN) < 0)
 		goto out;
 
 	icmp_packet = (struct icmp_packet *)skb->data;
@@ -454,7 +454,7 @@ int recv_icmp_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 		goto out;
 
 	/* create a copy of the skb, if needed, to modify it. */
-	if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
+	if (skb_cow(skb, ETH_HLEN) < 0)
 		goto out;
 
 	icmp_packet = (struct icmp_packet_rr *)skb->data;
@@ -841,7 +841,7 @@ static int route_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 		goto out;
 
 	/* create a copy of the skb, if needed, to modify it. */
-	if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
+	if (skb_cow(skb, ETH_HLEN) < 0)
 		goto out;
 
 	unicast_packet = (struct unicast_packet *)skb->data;
diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c
index b5f078c..7c66b61 100644
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@ -51,7 +51,7 @@ int send_skb_packet(struct sk_buff *skb, struct hard_iface *hard_iface,
 	}
 
 	/* push to the ethernet header. */
-	if (my_skb_head_push(skb, sizeof(*ethhdr)) < 0)
+	if (my_skb_head_push(skb, ETH_HLEN) < 0)
 		goto send_skb_err;
 
 	skb_reset_mac_header(skb);
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index efe0fba..6e2530b 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -292,7 +292,7 @@ void interface_rx(struct net_device *soft_iface,
 /*	skb->ip_summed = CHECKSUM_UNNECESSARY;*/
 
 	bat_priv->stats.rx_packets++;
-	bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr);
+	bat_priv->stats.rx_bytes += skb->len + ETH_HLEN;
 
 	soft_iface->last_rx = jiffies;
 
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index 4d93aad..2f4848b 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -27,7 +27,7 @@
 #include "packet.h"
 #include "bitarray.h"
 
-#define BAT_HEADER_LEN (sizeof(struct ethhdr) + \
+#define BAT_HEADER_LEN (ETH_HLEN + \
 	((sizeof(struct unicast_packet) > sizeof(struct bcast_packet) ? \
 	 sizeof(struct unicast_packet) : \
 	 sizeof(struct bcast_packet))))
diff --git a/net/batman-adv/vis.c b/net/batman-adv/vis.c
index c4a5b8c..cec216f 100644
--- a/net/batman-adv/vis.c
+++ b/net/batman-adv/vis.c
@@ -434,12 +434,12 @@ static struct vis_info *add_packet(struct bat_priv *bat_priv,
 		return NULL;
 
 	info->skb_packet = dev_alloc_skb(sizeof(*packet) + vis_info_len +
-					 sizeof(struct ethhdr));
+					 ETH_HLEN);
 	if (!info->skb_packet) {
 		kfree(info);
 		return NULL;
 	}
-	skb_reserve(info->skb_packet, sizeof(struct ethhdr));
+	skb_reserve(info->skb_packet, ETH_HLEN);
 	packet = (struct vis_packet *)skb_put(info->skb_packet, sizeof(*packet)
 					      + vis_info_len);
 
@@ -894,11 +894,11 @@ int vis_init(struct bat_priv *bat_priv)
 
 	bat_priv->my_vis_info->skb_packet = dev_alloc_skb(sizeof(*packet) +
 							  MAX_VIS_PACKET_SIZE +
-							 sizeof(struct ethhdr));
+							  ETH_HLEN);
 	if (!bat_priv->my_vis_info->skb_packet)
 		goto free_info;
 
-	skb_reserve(bat_priv->my_vis_info->skb_packet, sizeof(struct ethhdr));
+	skb_reserve(bat_priv->my_vis_info->skb_packet, ETH_HLEN);
 	packet = (struct vis_packet *)skb_put(bat_priv->my_vis_info->skb_packet,
 					      sizeof(*packet));
 
-- 
1.7.9.4

[B.A.T.M.A.N.] [PATCH 12/13] batman-adv: print OGM seq numbers as unsigned int

[Antonio Quartulli]

OGM sequence numbers are declared as uint32_t and so they have to printed
using %u instead of %d in order to avoid wrong representations.

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
---
 net/batman-adv/bat_iv_ogm.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index d7fa8af..1014210 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -152,7 +152,7 @@ static void bat_iv_ogm_send_to_if(struct forw_packet *forw_packet,
 							    "Sending own" :
 							    "Forwarding"));
 		bat_dbg(DBG_BATMAN, bat_priv,
-			"%s %spacket (originator %pM, seqno %d, TQ %d, TTL %d, IDF %s, ttvn %d) on interface %s [%pM]\n",
+			"%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s, ttvn %d) on interface %s [%pM]\n",
 			fwd_str, (packet_num > 0 ? "aggregated " : ""),
 			batman_ogm_packet->orig,
 			ntohl(batman_ogm_packet->seqno),
@@ -211,7 +211,7 @@ static void bat_iv_ogm_emit(struct forw_packet *forw_packet)
 
 		/* FIXME: what about aggregated packets ? */
 		bat_dbg(DBG_BATMAN, bat_priv,
-			"%s packet (originator %pM, seqno %d, TTL %d) on interface %s [%pM]\n",
+			"%s packet (originator %pM, seqno %u, TTL %d) on interface %s [%pM]\n",
 			(forw_packet->own ? "Sending own" : "Forwarding"),
 			batman_ogm_packet->orig,
 			ntohl(batman_ogm_packet->seqno),
@@ -892,7 +892,7 @@ static int bat_iv_ogm_update_seqnos(const struct ethhdr *ethhdr,
 
 	if (need_update) {
 		bat_dbg(DBG_BATMAN, bat_priv,
-			"updating last_seqno: old %d, new %d\n",
+			"updating last_seqno: old %u, new %u\n",
 			orig_node->last_real_seqno, batman_ogm_packet->seqno);
 		orig_node->last_real_seqno = batman_ogm_packet->seqno;
 	}
@@ -945,7 +945,7 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
 					   batman_ogm_packet->orig) ? 1 : 0);
 
 	bat_dbg(DBG_BATMAN, bat_priv,
-		"Received BATMAN packet via NB: %pM, IF: %s [%pM] (from OG: %pM, via prev OG: %pM, seqno %d, ttvn %u, crc %u, changes %u, td %d, TTL %d, V %d, IDF %d)\n",
+		"Received BATMAN packet via NB: %pM, IF: %s [%pM] (from OG: %pM, via prev OG: %pM, seqno %u, ttvn %u, crc %u, changes %u, td %d, TTL %d, V %d, IDF %d)\n",
 		ethhdr->h_source, if_incoming->net_dev->name,
 		if_incoming->net_dev->dev_addr, batman_ogm_packet->orig,
 		batman_ogm_packet->prev_sender, batman_ogm_packet->seqno,
-- 
1.7.9.4

[B.A.T.M.A.N.] [PATCH 13/13] batman-adv: skip the window protection test when the originator has no neighbours

[Antonio Quartulli]

When we receive an OGM from from a node for the first time, the last_real_seqno
field of the orig_node structure has not been initialised yet. The value of this
field is used to compute the current ogm-seqno window and therefore the
protection mechanism will probably drop the packet due to an out-of-window error.
To avoid this situation this patch adds a check to skip the window protection
mechanism if no neighbour nodes have already been added. When the first
neighbour node is added, the last_real_seqno field is initialised too.

Reported-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
---
 net/batman-adv/bat_iv_ogm.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index 1014210..8b2db2e 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -861,7 +861,8 @@ static int bat_iv_ogm_update_seqnos(const struct ethhdr *ethhdr,
 	seq_diff = batman_ogm_packet->seqno - orig_node->last_real_seqno;
 
 	/* signalize caller that the packet is to be dropped. */
-	if (window_protected(bat_priv, seq_diff,
+	if (!hlist_empty(&orig_node->neigh_list) &&
+	    window_protected(bat_priv, seq_diff,
 			     &orig_node->batman_seqno_reset))
 		goto out;
 
-- 
1.7.9.4

Re: [B.A.T.M.A.N.] pull request: batman-adv 2012-04-18

[David Miller]

From: Antonio Quartulli <ordex@autistici.org>
Date: Wed, 18 Apr 2012 11:59:57 +0200

> this is the fixed version of my previous pull request (issued on 2012-04-17).
> In this patchset the issues you reported have been fixed; moreover I'm
> also including two new patches (1/13 and 2/13) which are respectively:
> 
> 1/13) a fix for Al Viro's report about the missing htons()
> 2/13) a fix for a wrongly duplicated line in a comment
> 
> The following changes since commit ecffe75f934b4e3c5301fe5db278068e0efb0d6b:
> 
>   hippi: fix printk format in rrunner.c (2012-04-16 23:48:38 -0400)
> 
> are available in the git repository at:
> 
>   git://git.open-mesh.org/linux-merge.git tags/batman-adv-for-davem

This looks a lot better, pulled, thanks!

Re: [B.A.T.M.A.N.] pull request: batman-adv 2012-04-18

[Al Viro]

On Wed, Apr 18, 2012 at 11:59:57AM +0200, Antonio Quartulli wrote:
> Hello David,
> 
> this is the fixed version of my previous pull request (issued on 2012-04-17).
> In this patchset the issues you reported have been fixed; moreover I'm
> also including two new patches (1/13 and 2/13) which are respectively:
> 
> 1/13) a fix for Al Viro's report about the missing htons()

Speaking of endianness stuff: here's a series of 4 patches on top of
your merge.git/master, hopefully getting all that stuff endian-clean,
at least from the sparse POV.  And AFAICS all on-the-wire stuff is
correctly annotated...

[B.A.T.M.A.N.] [PATCH 1/4] batman: don't bother flipping ->tt_data

[Al Viro]

just keep it net-endian all along

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 net/batman-adv/packet.h            |    2 +-
 net/batman-adv/routing.c           |    6 +-----
 net/batman-adv/translation-table.c |    8 ++++----
 3 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h
index 307dbb3..9157f7c 100644
--- a/net/batman-adv/packet.h
+++ b/net/batman-adv/packet.h
@@ -220,7 +220,7 @@ struct tt_query_packet {
 	 * if TT_REQUEST: crc associated with the
 	 *		  ttvn
 	 * if TT_RESPONSE: table_size */
-	uint16_t tt_data;
+	__be16   tt_data;
 } __packed;
 
 struct roam_adv_packet {
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index 2181a91..4310cfe 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -596,8 +596,6 @@ int recv_tt_query(struct sk_buff *skb, struct hard_iface *recv_if)
 
 	tt_query = (struct tt_query_packet *)skb->data;
 
-	tt_query->tt_data = ntohs(tt_query->tt_data);
-
 	switch (tt_query->flags & TT_QUERY_TYPE_MASK) {
 	case TT_REQUEST:
 		/* If we cannot provide an answer the tt_request is
@@ -607,7 +605,6 @@ int recv_tt_query(struct sk_buff *skb, struct hard_iface *recv_if)
 				"Routing TT_REQUEST to %pM [%c]\n",
 				tt_query->dst,
 				(tt_query->flags & TT_FULL_TABLE ? 'F' : '.'));
-			tt_query->tt_data = htons(tt_query->tt_data);
 			return route_unicast_packet(skb, recv_if);
 		}
 		break;
@@ -618,7 +615,7 @@ int recv_tt_query(struct sk_buff *skb, struct hard_iface *recv_if)
 			if (skb_linearize(skb) < 0)
 				goto out;
 
-			tt_len = tt_query->tt_data * sizeof(struct tt_change);
+			tt_len = ntohs(tt_query->tt_data) * sizeof(struct tt_change);
 
 			/* Ensure we have all the claimed data */
 			if (unlikely(skb_headlen(skb) <
@@ -631,7 +628,6 @@ int recv_tt_query(struct sk_buff *skb, struct hard_iface *recv_if)
 				"Routing TT_RESPONSE to %pM [%c]\n",
 				tt_query->dst,
 				(tt_query->flags & TT_FULL_TABLE ? 'F' : '.'));
-			tt_query->tt_data = htons(tt_query->tt_data);
 			return route_unicast_packet(skb, recv_if);
 		}
 		break;
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index 88e4c8e..a9c2b59 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -1416,7 +1416,7 @@ static bool send_other_tt_response(struct bat_priv *bat_priv,
 
 	/* I don't have the requested data */
 	if (orig_ttvn != req_ttvn ||
-	    tt_request->tt_data != req_dst_orig_node->tt_crc)
+	    tt_request->tt_data != htons(req_dst_orig_node->tt_crc))
 		goto out;
 
 	/* If the full table has been explicitly requested */
@@ -1672,7 +1672,7 @@ static void tt_fill_gtable(struct bat_priv *bat_priv,
 
 	_tt_update_changes(bat_priv, orig_node,
 			   (struct tt_change *)(tt_response + 1),
-			   tt_response->tt_data, tt_response->ttvn);
+			   ntohs(tt_response->tt_data), tt_response->ttvn);
 
 	spin_lock_bh(&orig_node->tt_buff_lock);
 	kfree(orig_node->tt_buff);
@@ -1727,7 +1727,7 @@ void handle_tt_response(struct bat_priv *bat_priv,
 
 	bat_dbg(DBG_TT, bat_priv,
 		"Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n",
-		tt_response->src, tt_response->ttvn, tt_response->tt_data,
+		tt_response->src, tt_response->ttvn, ntohs(tt_response->tt_data),
 		(tt_response->flags & TT_FULL_TABLE ? 'F' : '.'));
 
 	/* we should have never asked a backbone gw */
@@ -1741,7 +1741,7 @@ void handle_tt_response(struct bat_priv *bat_priv,
 	if (tt_response->flags & TT_FULL_TABLE)
 		tt_fill_gtable(bat_priv, tt_response);
 	else
-		tt_update_changes(bat_priv, orig_node, tt_response->tt_data,
+		tt_update_changes(bat_priv, orig_node, ntohs(tt_response->tt_data),
 				  tt_response->ttvn,
 				  (struct tt_change *)(tt_response + 1));
 
-- 
1.7.2.5

[B.A.T.M.A.N.] [PATCH 2/4] batman: don't bother flipping ->tt_crc

[Al Viro]

Again, keep ->tt_crc in batman_ogv_packet net-endian

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 net/batman-adv/bat_iv_ogm.c |    6 ++----
 net/batman-adv/packet.h     |    2 +-
 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index ab2085c..5aa8861 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -544,7 +544,6 @@ static void bat_iv_ogm_forward(struct orig_node *orig_node,
 		batman_ogm_packet->tq, batman_ogm_packet->header.ttl);
 
 	batman_ogm_packet->seqno = htonl(batman_ogm_packet->seqno);
-	batman_ogm_packet->tt_crc = htons(batman_ogm_packet->tt_crc);
 
 	/* switch of primaries first hop flag when forwarding */
 	batman_ogm_packet->flags &= ~PRIMARIES_FIRST_HOP;
@@ -722,7 +721,7 @@ update_tt:
 		tt_update_orig(bat_priv, orig_node, tt_buff,
 			       batman_ogm_packet->tt_num_changes,
 			       batman_ogm_packet->ttvn,
-			       batman_ogm_packet->tt_crc);
+			       ntohs(batman_ogm_packet->tt_crc));
 
 	if (orig_node->gw_flags != batman_ogm_packet->gw_flags)
 		gw_node_update(bat_priv, orig_node,
@@ -969,7 +968,7 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
 		ethhdr->h_source, if_incoming->net_dev->name,
 		if_incoming->net_dev->dev_addr, batman_ogm_packet->orig,
 		batman_ogm_packet->prev_sender, batman_ogm_packet->seqno,
-		batman_ogm_packet->ttvn, batman_ogm_packet->tt_crc,
+		batman_ogm_packet->ttvn, ntohs(batman_ogm_packet->tt_crc),
 		batman_ogm_packet->tt_num_changes, batman_ogm_packet->tq,
 		batman_ogm_packet->header.ttl,
 		batman_ogm_packet->header.version, has_directlink_flag);
@@ -1214,7 +1213,6 @@ static int bat_iv_ogm_receive(struct sk_buff *skb,
 		/* network to host order for our 32bit seqno and the
 		   orig_interval */
 		batman_ogm_packet->seqno = ntohl(batman_ogm_packet->seqno);
-		batman_ogm_packet->tt_crc = ntohs(batman_ogm_packet->tt_crc);
 
 		tt_buff = packet_buff + buff_pos + BATMAN_OGM_HLEN;
 
diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h
index 9157f7c..61a7fe0 100644
--- a/net/batman-adv/packet.h
+++ b/net/batman-adv/packet.h
@@ -132,7 +132,7 @@ struct batman_ogm_packet {
 	uint8_t  tq;
 	uint8_t  tt_num_changes;
 	uint8_t  ttvn; /* translation table version number */
-	uint16_t tt_crc;
+	__be16   tt_crc;
 } __packed;
 
 #define BATMAN_OGM_HLEN sizeof(struct batman_ogm_packet)
-- 
1.7.2.5

[B.A.T.M.A.N.] batman: keep batman_ogm_packet ->seqno net-endian all along

[Al Viro]

Ditto for its ->seqno...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 net/batman-adv/bat_iv_ogm.c |   25 ++++++++++---------------
 net/batman-adv/packet.h     |    2 +-
 2 files changed, 11 insertions(+), 16 deletions(-)

diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index 5aa8861..cc6d4c3 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -34,11 +34,11 @@ static struct neigh_node *bat_iv_ogm_neigh_new(struct hard_iface *hard_iface,
 					       const uint8_t *neigh_addr,
 					       struct orig_node *orig_node,
 					       struct orig_node *orig_neigh,
-					       uint32_t seqno)
+					       __be32 seqno)
 {
 	struct neigh_node *neigh_node;
 
-	neigh_node = neigh_node_new(hard_iface, neigh_addr, seqno);
+	neigh_node = neigh_node_new(hard_iface, neigh_addr, ntohl(seqno));
 	if (!neigh_node)
 		goto out;
 
@@ -543,8 +543,6 @@ static void bat_iv_ogm_forward(struct orig_node *orig_node,
 		"Forwarding packet: tq: %i, ttl: %i\n",
 		batman_ogm_packet->tq, batman_ogm_packet->header.ttl);
 
-	batman_ogm_packet->seqno = htonl(batman_ogm_packet->seqno);
-
 	/* switch of primaries first hop flag when forwarding */
 	batman_ogm_packet->flags &= ~PRIMARIES_FIRST_HOP;
 	if (is_single_hop_neigh)
@@ -868,13 +866,14 @@ static int bat_iv_ogm_update_seqnos(const struct ethhdr *ethhdr,
 	int32_t seq_diff;
 	int need_update = 0;
 	int set_mark, ret = -1;
+	uint32_t seqno = ntohl(batman_ogm_packet->seqno);
 
 	orig_node = get_orig_node(bat_priv, batman_ogm_packet->orig);
 	if (!orig_node)
 		return 0;
 
 	spin_lock_bh(&orig_node->ogm_cnt_lock);
-	seq_diff = batman_ogm_packet->seqno - orig_node->last_real_seqno;
+	seq_diff = seqno - orig_node->last_real_seqno;
 
 	/* signalize caller that the packet is to be dropped. */
 	if (!hlist_empty(&orig_node->neigh_list) &&
@@ -888,7 +887,7 @@ static int bat_iv_ogm_update_seqnos(const struct ethhdr *ethhdr,
 
 		is_duplicate |= bat_test_bit(tmp_neigh_node->real_bits,
 					     orig_node->last_real_seqno,
-					     batman_ogm_packet->seqno);
+					     seqno);
 
 		if (compare_eth(tmp_neigh_node->addr, ethhdr->h_source) &&
 		    (tmp_neigh_node->if_incoming == if_incoming))
@@ -910,8 +909,8 @@ static int bat_iv_ogm_update_seqnos(const struct ethhdr *ethhdr,
 	if (need_update) {
 		bat_dbg(DBG_BATMAN, bat_priv,
 			"updating last_seqno: old %u, new %u\n",
-			orig_node->last_real_seqno, batman_ogm_packet->seqno);
-		orig_node->last_real_seqno = batman_ogm_packet->seqno;
+			orig_node->last_real_seqno, seqno);
+		orig_node->last_real_seqno = seqno;
 	}
 
 	ret = is_duplicate;
@@ -967,7 +966,7 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
 		"Received BATMAN packet via NB: %pM, IF: %s [%pM] (from OG: %pM, via prev OG: %pM, seqno %u, ttvn %u, crc %u, changes %u, td %d, TTL %d, V %d, IDF %d)\n",
 		ethhdr->h_source, if_incoming->net_dev->name,
 		if_incoming->net_dev->dev_addr, batman_ogm_packet->orig,
-		batman_ogm_packet->prev_sender, batman_ogm_packet->seqno,
+		batman_ogm_packet->prev_sender, ntohl(batman_ogm_packet->seqno),
 		batman_ogm_packet->ttvn, ntohs(batman_ogm_packet->tt_crc),
 		batman_ogm_packet->tt_num_changes, batman_ogm_packet->tq,
 		batman_ogm_packet->header.ttl,
@@ -1039,7 +1038,7 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
 			word = &(orig_neigh_node->bcast_own[offset]);
 			bat_set_bit(word,
 				    if_incoming_seqno -
-						batman_ogm_packet->seqno - 2);
+					ntohl(batman_ogm_packet->seqno) - 2);
 			orig_neigh_node->bcast_own_sum[if_incoming->if_num] =
 				bitmap_weight(word, TQ_LOCAL_WINDOW_SIZE);
 			spin_unlock_bh(&orig_neigh_node->ogm_cnt_lock);
@@ -1132,7 +1131,7 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
 	 * seqno and similar ttl as the non-duplicate */
 	if (is_bidirectional &&
 	    (!is_duplicate ||
-	     ((orig_node->last_real_seqno == batman_ogm_packet->seqno) &&
+	     ((orig_node->last_real_seqno == ntohl(batman_ogm_packet->seqno)) &&
 	      (orig_node->last_ttl - 3 <= batman_ogm_packet->header.ttl))))
 		bat_iv_ogm_orig_update(bat_priv, orig_node, ethhdr,
 				       batman_ogm_packet, if_incoming,
@@ -1210,10 +1209,6 @@ static int bat_iv_ogm_receive(struct sk_buff *skb,
 
 	/* unpack the aggregated packets and process them one by one */
 	do {
-		/* network to host order for our 32bit seqno and the
-		   orig_interval */
-		batman_ogm_packet->seqno = ntohl(batman_ogm_packet->seqno);
-
 		tt_buff = packet_buff + buff_pos + BATMAN_OGM_HLEN;
 
 		bat_iv_ogm_process(ethhdr, batman_ogm_packet,
diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h
index 61a7fe0..ad39938 100644
--- a/net/batman-adv/packet.h
+++ b/net/batman-adv/packet.h
@@ -125,7 +125,7 @@ struct batman_header {
 struct batman_ogm_packet {
 	struct batman_header header;
 	uint8_t  flags;    /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
-	uint32_t seqno;
+	__be32   seqno;
 	uint8_t  orig[ETH_ALEN];
 	uint8_t  prev_sender[ETH_ALEN];
 	uint8_t  gw_flags;  /* flags related to gateway class */
-- 
1.7.2.5

[B.A.T.M.A.N.] batman: trivial endianness annotations

[Al Viro]

Missing endianness annotations - on-the-wire data and ip addresses.
BTW, casting memcpy() arguments to (uint8_t *) is cargo-cult programming -
they are void *, which is precisely "take any pointer to object"...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 net/batman-adv/bridge_loop_avoidance.c |    8 ++++----
 net/batman-adv/distributed-arp-table.c |   16 ++++++++--------
 net/batman-adv/distributed-arp-table.h |    4 ++--
 net/batman-adv/packet.h                |   12 ++++++------
 4 files changed, 20 insertions(+), 20 deletions(-)

diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c
index 8bf9751..d51288b 100644
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -258,7 +258,7 @@ static void bla_send_claim(struct bat_priv *bat_priv, uint8_t *mac,
 	struct net_device *soft_iface;
 	uint8_t *hw_src;
 	struct bla_claim_dst local_claim_dest;
-	uint32_t zeroip = 0;
+	__be32 zeroip = 0;
 
 	primary_if = primary_if_get_selected(bat_priv);
 	if (!primary_if)
@@ -506,11 +506,11 @@ static void bla_send_announce(struct bat_priv *bat_priv,
 			      struct backbone_gw *backbone_gw)
 {
 	uint8_t mac[ETH_ALEN];
-	uint16_t crc;
+	__be16 crc;
 
 	memcpy(mac, announce_mac, 4);
 	crc = htons(backbone_gw->crc);
-	memcpy(&mac[4], (uint8_t *)&crc, 2);
+	memcpy(&mac[4], &crc, 2);
 
 	bla_send_claim(bat_priv, mac, backbone_gw->vid, CLAIM_TYPE_ANNOUNCE);
 
@@ -627,7 +627,7 @@ static int handle_announce(struct bat_priv *bat_priv,
 
 	/* handle as ANNOUNCE frame */
 	backbone_gw->lasttime = jiffies;
-	crc = ntohs(*((uint16_t *)(&an_addr[4])));
+	crc = ntohs(*((__be16 *)(&an_addr[4])));
 
 	bat_dbg(DBG_BLA, bat_priv,
 		"handle_announce(): ANNOUNCE vid %d (sent by %pM)... CRC = %04x\n",
diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c
index b43bece..d87f914 100644
--- a/net/batman-adv/distributed-arp-table.c
+++ b/net/batman-adv/distributed-arp-table.c
@@ -192,7 +192,7 @@ static void choose_next_candidate(struct bat_priv *bat_priv,
  *
  * return an array of size DHT_CANDIDATES_NUM */
 static struct dht_candidate *dht_select_candidates(struct bat_priv *bat_priv,
-						   uint32_t ip_dst)
+						   __be32 ip_dst)
 {
 	int select;
 	dat_addr_t last_max = DAT_ADDR_MAX, ip_key;
@@ -224,7 +224,7 @@ static struct dht_candidate *dht_select_candidates(struct bat_priv *bat_priv,
  * If the packet is successfully sent to at least one candidate, then this
  * function returns true */
 static bool dht_send_data(struct bat_priv *bat_priv, struct sk_buff *skb,
-			  uint32_t ip, int packet_subtype)
+			  __be32 ip, int packet_subtype)
 {
 	int i;
 	bool ret = false;
@@ -270,7 +270,7 @@ out:
 /* Update the neighbour entry corresponding to the IP passed as parameter with
  * the hw address hw. If the neighbour entry doesn't exists, then it will be
  * created */
-static void arp_neigh_update(struct bat_priv *bat_priv, uint32_t ip,
+static void arp_neigh_update(struct bat_priv *bat_priv, __be32 ip,
 			     uint8_t *hw)
 {
 	struct neighbour *n = NULL;
@@ -299,7 +299,7 @@ static uint16_t arp_get_type(struct bat_priv *bat_priv, struct sk_buff *skb,
 {
 	struct arphdr *arphdr;
 	struct ethhdr *ethhdr;
-	uint32_t ip_src, ip_dst;
+	__be32 ip_src, ip_dst;
 	uint16_t type = 0;
 
 	/* pull the ethernet header */
@@ -352,7 +352,7 @@ bool dat_snoop_outgoing_arp_request(struct bat_priv *bat_priv,
 				    struct sk_buff *skb)
 {
 	uint16_t type = 0;
-	uint32_t ip_dst, ip_src;
+	__be32 ip_dst, ip_src;
 	uint8_t *hw_src;
 	bool ret = false;
 	struct neighbour *n = NULL;
@@ -414,7 +414,7 @@ bool dat_snoop_incoming_arp_request(struct bat_priv *bat_priv,
 				    struct sk_buff *skb, int hdr_size)
 {
 	uint16_t type;
-	uint32_t ip_src, ip_dst;
+	__be32 ip_src, ip_dst;
 	uint8_t *hw_src;
 	struct hard_iface *primary_if = NULL;
 	struct sk_buff *skb_new;
@@ -470,7 +470,7 @@ bool dat_snoop_outgoing_arp_reply(struct bat_priv *bat_priv,
 				  struct sk_buff *skb)
 {
 	uint16_t type;
-	uint32_t ip_src, ip_dst;
+	__be32 ip_src, ip_dst;
 	uint8_t *hw_src, *hw_dst;
 	bool ret = false;
 
@@ -503,7 +503,7 @@ bool dat_snoop_incoming_arp_reply(struct bat_priv *bat_priv,
 				  struct sk_buff *skb, int hdr_size)
 {
 	uint16_t type;
-	uint32_t ip_src, ip_dst;
+	__be32 ip_src, ip_dst;
 	uint8_t *hw_src, *hw_dst;
 	bool ret = false;
 
diff --git a/net/batman-adv/distributed-arp-table.h b/net/batman-adv/distributed-arp-table.h
index fcf6c15..01d5b4f 100644
--- a/net/batman-adv/distributed-arp-table.h
+++ b/net/batman-adv/distributed-arp-table.h
@@ -33,10 +33,10 @@
 
 #define ARP_HW_SRC(skb, hdr_size) ((uint8_t *)(skb->data + hdr_size) + \
 				   ETH_HLEN + sizeof(struct arphdr))
-#define ARP_IP_SRC(skb, hdr_size) (*(uint32_t *)(ARP_HW_SRC(skb, hdr_size) + \
+#define ARP_IP_SRC(skb, hdr_size) (*(__be32 *)(ARP_HW_SRC(skb, hdr_size) + \
 				   ETH_ALEN))
 #define ARP_HW_DST(skb, hdr_size) (ARP_HW_SRC(skb, hdr_size) + ETH_ALEN + 4)
-#define ARP_IP_DST(skb, hdr_size) (*(uint32_t *)(ARP_HW_SRC(skb, hdr_size) + \
+#define ARP_IP_DST(skb, hdr_size) (*(__be32 *)(ARP_HW_SRC(skb, hdr_size) + \
 				   ETH_ALEN * 2 + 4))
 
 bool dat_snoop_outgoing_arp_request(struct bat_priv *bat_priv,
diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h
index ad39938..eb4fdf6 100644
--- a/net/batman-adv/packet.h
+++ b/net/batman-adv/packet.h
@@ -113,7 +113,7 @@ enum bla_claimframe {
 struct bla_claim_dst {
 	uint8_t magic[3];	/* FF:43:05 */
 	uint8_t type;		/* bla_claimframe */
-	uint16_t group;		/* group id */
+	__be16 group;		/* group id */
 } __packed;
 
 struct batman_header {
@@ -142,7 +142,7 @@ struct icmp_packet {
 	uint8_t  msg_type; /* see ICMP message types above */
 	uint8_t  dst[ETH_ALEN];
 	uint8_t  orig[ETH_ALEN];
-	uint16_t seqno;
+	__be16   seqno;
 	uint8_t  uid;
 	uint8_t  reserved;
 } __packed;
@@ -156,7 +156,7 @@ struct icmp_packet_rr {
 	uint8_t  msg_type; /* see ICMP message types above */
 	uint8_t  dst[ETH_ALEN];
 	uint8_t  orig[ETH_ALEN];
-	uint16_t seqno;
+	__be16   seqno;
 	uint8_t  uid;
 	uint8_t  rr_cur;
 	uint8_t  rr[BAT_RR_LEN][ETH_ALEN];
@@ -181,20 +181,20 @@ struct unicast_frag_packet {
 	uint8_t  flags;
 	uint8_t  align;
 	uint8_t  orig[ETH_ALEN];
-	uint16_t seqno;
+	__be16   seqno;
 } __packed;
 
 struct bcast_packet {
 	struct batman_header header;
 	uint8_t  reserved;
-	uint32_t seqno;
+	__be32   seqno;
 	uint8_t  orig[ETH_ALEN];
 } __packed;
 
 struct vis_packet {
 	struct batman_header header;
 	uint8_t  vis_type;	 /* which type of vis-participant sent this? */
-	uint32_t seqno;		 /* sequence number */
+	__be32   seqno;		 /* sequence number */
 	uint8_t  entries;	 /* number of entries behind this struct */
 	uint8_t  reserved;
 	uint8_t  vis_orig[ETH_ALEN];	/* originator reporting its neighbors */
-- 
1.7.2.5

Re: [B.A.T.M.A.N.] batman: keep batman_ogm_packet ->seqno net-endian all along

[Al Viro]

grr... this one would be 3/4 and the last ("trivial endianness annotations") -
4/4.  My apologies...

Re: [B.A.T.M.A.N.] [PATCH 2/4] batman: don't bother flipping ->tt_crc

[Antonio Quartulli]

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On Wed, Apr 18, 2012 at 07:10:58 +0100, Al Viro wrote:
> @@ -722,7 +721,7 @@ update_tt:
>  		tt_update_orig(bat_priv, orig_node, tt_buff,
>  			       batman_ogm_packet->tt_num_changes,
>  			       batman_ogm_packet->ttvn,
> -			       batman_ogm_packet->tt_crc);
> +			       ntohs(batman_ogm_packet->tt_crc));

If we don't need to flip tt_crc, wy are you introducing ntohs here? Am I
overlooking something?

> @@ -969,7 +968,7 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
>  		ethhdr->h_source, if_incoming->net_dev->name,
>  		if_incoming->net_dev->dev_addr, batman_ogm_packet->orig,
>  		batman_ogm_packet->prev_sender, batman_ogm_packet->seqno,
> -		batman_ogm_packet->ttvn, batman_ogm_packet->tt_crc,
> +		batman_ogm_packet->ttvn, ntohs(batman_ogm_packet->tt_crc),
>  		batman_ogm_packet->tt_num_changes, batman_ogm_packet->tq,

The same here..I am not understanding..

Thank you for your patches!

Cheers,


-- 
Antonio Quartulli

..each of us alone is worth nothing..
Ernesto "Che" Guevara

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Re: [B.A.T.M.A.N.] [PATCH 2/4] batman: don't bother flipping ->tt_crc

[Antonio Quartulli]

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On Thu, Apr 19, 2012 at 07:41:14AM +0200, Antonio Quartulli wrote:
> On Wed, Apr 18, 2012 at 07:10:58 +0100, Al Viro wrote:
> > @@ -722,7 +721,7 @@ update_tt:
> >  		tt_update_orig(bat_priv, orig_node, tt_buff,
> >  			       batman_ogm_packet->tt_num_changes,
> >  			       batman_ogm_packet->ttvn,
> > -			       batman_ogm_packet->tt_crc);
> > +			       ntohs(batman_ogm_packet->tt_crc));
> 
> If we don't need to flip tt_crc, wy are you introducing ntohs here? Am I
> overlooking something?

Ok. I was missing the correct meaning of __be16. Now everything is clear.


Cheers,

-- 
Antonio Quartulli

..each of us alone is worth nothing..
Ernesto "Che" Guevara

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Re: [B.A.T.M.A.N.] pull request: batman-adv 2012-04-18

[Antonio Quartulli]

[-- Attachment #1: Type: text/plain, Size: 1982 bytes --]

Hello,

On Thu, Apr 19, 2012 at 02:48:54 +0100, Al Viro wrote:
> On Thu, Apr 19, 2012 at 08:10:27AM +0200, Antonio Quartulli wrote:
> 
> > Hello Al,
> > 
> > and thank you very much for your patches.
> > Before committing them, do you mind if we reword the subject by substituting
> > "batman" with "batman-adv"?
> 
> No problem...
> 
> > Moreover, patch 3/4, fixes the memcpy() casting too other than the endianess
> 
> 4/4, actually.
> 
> > stuff. We would prefer to have two different patches for fixing those two
> > issues. What about splitting it and resending them?
> 
> Can do; I've just grepped for memcpy() in there, to see if there are other
> places like that.  

Thanks!

> Haven't found any, but
> 	* you do an awful lot of GFP_ATOMIC allocations and those can and
> do fail from time to time.  What's worse, you ignore some of those failures -
> e.g. failing allocation in orig_hash_{add,del}_if() will be ignored by the
> caller.  I haven't looked into that code enough to tell if it could be
> exploited, but I really don't like the look of it...
> 	* orig_node_add_if() leaves junk in added array elements.  You do
> kmalloc() followed by memcpy(), but leave the last element uninitialized.
> May be safe if you assign it soon enough, but I'd suggest checking that.
> 	* orig_node_del_if() looks odd - it removes element #hard_iface->if_num
> and shifts all subsequent ones down; then it renumbers interfaces to match
> that.  So far, so good, and there's even a plausible comment about locking:
>         /* renumber remaining batman interfaces _inside_ of orig_hash_lock */
> except that no such lock exists since commit d007260.  What protects us from
> the obvious race in there?


Thank you very much for your analysis. I really appreciated it!
I'm CCing our mailing list so that other people can comment on it.


Cheers,

-- 
Antonio Quartulli

..each of us alone is worth nothing..
Ernesto "Che" Guevara

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Re: [B.A.T.M.A.N.] pull request: batman-adv 2012-04-18

[Marek Lindner]

Hi,

> Haven't found any, but
> 
> 	* you do an awful lot of GFP_ATOMIC allocations and those can and
> do fail from time to time.  What's worse, you ignore some of those
> failures - e.g. failing allocation in orig_hash_{add,del}_if() will be
> ignored by the caller.  I haven't looked into that code enough to tell
> if it could be exploited, but I really don't like the look of it...

other GFP_* allocations can't fail ?
This whole resizing isn't escpecially beautiful and asks for some love.


> 	* orig_node_add_if() leaves junk in added array elements.  You do
> kmalloc() followed by memcpy(), but leave the last element uninitialized.
> May be safe if you assign it soon enough, but I'd suggest checking that.

Replacing kmalloc() with kzalloc() should do, right ?


> 	* orig_node_del_if() looks odd - it removes element #hard_iface->if_num
> and shifts all subsequent ones down; then it renumbers interfaces to
> match that.  So far, so good, and there's even a plausible comment about
> locking:
>    /* renumber remaining batman interfaces _inside_ of orig_hash_lock */
> except that no such lock exists since commit d007260.  What protects us
> from the obvious race in there?

Thanks for catching this. I agree that this is not properly protected. All 
functions accessing orig_node->bcast_own(_sum) use orig_node->ogm_cnt_lock to 
lock each other out. Obviously we would need a global lock for the interface 
renumbering which will be as ugly as the current array resizing is. You don't 
happen to have a good example of a resizable array at hand ?

Cheers,
Marek

Re: [B.A.T.M.A.N.] pull request: batman-adv 2012-04-18

[Al Viro]

On Mon, Apr 23, 2012 at 01:18:25PM +0800, Marek Lindner wrote:
> 
> Hi,
> 
> > Haven't found any, but
> > 
> > 	* you do an awful lot of GFP_ATOMIC allocations and those can and
> > do fail from time to time.  What's worse, you ignore some of those
> > failures - e.g. failing allocation in orig_hash_{add,del}_if() will be
> > ignored by the caller.  I haven't looked into that code enough to tell
> > if it could be exploited, but I really don't like the look of it...
> 
> other GFP_* allocations can't fail ?
> This whole resizing isn't escpecially beautiful and asks for some love.

Other GFP_* allocations fail only when system is in a really lousy state -
killing processes, etc.  GFP_ATOMIC can fail in much milder conditions;
note that they can't e.g. swap a page out or write a dirty page out and
free it, etc.  _Any_ allocation failures need to be dealt with, of course,
but with GFP_ATOMIC ones failures are just a fact of life - it's not even
an emergency situation.

> > 	* orig_node_add_if() leaves junk in added array elements.  You do
> > kmalloc() followed by memcpy(), but leave the last element uninitialized.
> > May be safe if you assign it soon enough, but I'd suggest checking that.
> 
> Replacing kmalloc() with kzalloc() should do, right ?

*shrug*
That would do it, all right, but since you memcpy() over all but the last
element, I'd suggest cleaning that last element explicitly.  Hell knows -
depends on how large your arrays are...

> > 	* orig_node_del_if() looks odd - it removes element #hard_iface->if_num
> > and shifts all subsequent ones down; then it renumbers interfaces to
> > match that.  So far, so good, and there's even a plausible comment about
> > locking:
> >    /* renumber remaining batman interfaces _inside_ of orig_hash_lock */
> > except that no such lock exists since commit d007260.  What protects us
> > from the obvious race in there?
> 
> Thanks for catching this. I agree that this is not properly protected. All 
> functions accessing orig_node->bcast_own(_sum) use orig_node->ogm_cnt_lock to 
> lock each other out. Obviously we would need a global lock for the interface 
> renumbering which will be as ugly as the current array resizing is. You don't 
> happen to have a good example of a resizable array at hand ?

Depends...  How large those arrays realistically get?  I would probably
consider allocating these guys separately and hashing them by orig_node/hwif
pair, but feasibility of that depends on how many of each do you expect to
see and how often do their numbers change...

Re: [B.A.T.M.A.N.] pull request: batman-adv 2012-04-18

[Marek Lindner]

On Monday, April 23, 2012 14:43:24 Al Viro wrote:
> Other GFP_* allocations fail only when system is in a really lousy state -
> killing processes, etc.  GFP_ATOMIC can fail in much milder conditions;
> note that they can't e.g. swap a page out or write a dirty page out and
> free it, etc.  _Any_ allocation failures need to be dealt with, of course,
> but with GFP_ATOMIC ones failures are just a fact of life - it's not even
> an emergency situation.

Ok, that is what I thought.


> > Replacing kmalloc() with kzalloc() should do, right ?
> 
> *shrug*
> That would do it, all right, but since you memcpy() over all but the last
> element, I'd suggest cleaning that last element explicitly.  Hell knows -
> depends on how large your arrays are...

Don't think that is worth the hassle. The index of these arrays is the number 
of interfaces batman is running on. In 90% of all cases it will be a single 
interface. Have yet to encounter a system with more than 3 interfaces.


> > Thanks for catching this. I agree that this is not properly protected.
> > All functions accessing orig_node->bcast_own(_sum) use
> > orig_node->ogm_cnt_lock to lock each other out. Obviously we would need
> > a global lock for the interface renumbering which will be as ugly as the
> > current array resizing is. You don't happen to have a good example of a
> > resizable array at hand ?
> 
> Depends...  How large those arrays realistically get?  I would probably
> consider allocating these guys separately and hashing them by
> orig_node/hwif pair, but feasibility of that depends on how many of each
> do you expect to see and how often do their numbers change...

As I explained above: The index is not big and does not change often (when an 
interface is added or removed).
Can you explain the "hashing them by orig_node/hwif pair" part in greater 
detail ?

Thanks,
Marek

Re: [B.A.T.M.A.N.] [PATCH 1/5] batman-adv: don't bother flipping ->tt_data

[Marek Lindner]

Hey,

I was about to merge the patch when I realized checkpatch is complaining. See 
below for details.


> @@ -618,7 +615,7 @@ int recv_tt_query(struct sk_buff *skb, struct
> hard_iface *recv_if) if (skb_linearize(skb) < 0)
>  				goto out;
> 
> -			tt_len = tt_query->tt_data * sizeof(struct tt_change);
> +			tt_len = ntohs(tt_query->tt_data) * sizeof(struct tt_change);

Line is too long.


> @@ -1727,7 +1727,7 @@ void handle_tt_response(struct bat_priv *bat_priv,
> 
>  	bat_dbg(DBG_TT, bat_priv,
>  		"Received TT_RESPONSE from %pM for ttvn %d t_size: %d [%c]\n",
> -		tt_response->src, tt_response->ttvn, tt_response->tt_data,
> +		tt_response->src, tt_response->ttvn, ntohs(tt_response->tt_data),
>  		(tt_response->flags & TT_FULL_TABLE ? 'F' : '.'));
> 
>  	/* we should have never asked a backbone gw */
> @@ -1741,7 +1741,7 @@ void handle_tt_response(struct bat_priv *bat_priv,
>  	if (tt_response->flags & TT_FULL_TABLE)
>  		tt_fill_gtable(bat_priv, tt_response);
>  	else
> -		tt_update_changes(bat_priv, orig_node, tt_response->tt_data,
> +		tt_update_changes(bat_priv, orig_node, ntohs(tt_response->tt_data),
>  				  tt_response->ttvn,
>  				  (struct tt_change *)(tt_response + 1));

Both changes are too long as well.

Regards,
Marek

Re: [B.A.T.M.A.N.] [PATCH 5/5] batman-adv: get rid of pointless cast in memcpy()

[Marek Lindner]

On Sunday, April 22, 2012 14:50:29 Al Viro wrote:
> memcpy() arguments are void *, precisely to avoid that kind of pointless
> casts.
> 
> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Applied in revision 815cfb5.

Thanks,
Marek

Re: [B.A.T.M.A.N.] [PATCH 4/5] batman-adv: trivial endianness annotations

[Marek Lindner]

On Sunday, April 22, 2012 14:47:50 Al Viro wrote:
> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
> ---
>  net/batman-adv/bridge_loop_avoidance.c |    6 +++---
>  net/batman-adv/distributed-arp-table.c |   16 ++++++++--------
>  net/batman-adv/distributed-arp-table.h |    4 ++--
>  net/batman-adv/packet.h                |   12 ++++++------
>  4 files changed, 19 insertions(+), 19 deletions(-)

Applied in revision 276f053.

Thanks,
Marek

Re: [B.A.T.M.A.N.] [PATCH 3/5] batman-adv: keep batman_ogm_packet ->seqno net-endian all along

[Marek Lindner]

On Sunday, April 22, 2012 14:46:29 Al Viro wrote:
> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
> ---
>  net/batman-adv/bat_iv_ogm.c |   25 ++++++++++---------------
>  net/batman-adv/packet.h     |    2 +-
>  2 files changed, 11 insertions(+), 16 deletions(-)

Applied in revision e62e464.

Thanks,
Marek