Staging: batman-adv: add routing debug log accessible via debugfs

All routing debug messages are saved in a ring buffer that can be
read via the debugfs file "log".
Note that CONFIG_BATMAN_ADV_DEBUG must be activated to have the
debug logs compiled in.

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 38 insertions, 22 deletions

diff --git a/drivers/staging/batman-adv/routing.c b/drivers/staging/batman-adv/routing.c
index 127cfbfc1da9..418ae09120f3 100644
--- a/drivers/staging/batman-adv/routing.c
+++ b/drivers/staging/batman-adv/routing.c
@@ -77,24 +77,27 @@ static void update_route(struct orig_node *orig_node,
 			 struct neigh_node *neigh_node,
 			 unsigned char *hna_buff, int hna_buff_len)
 {
+	/* FIXME: each orig_node->batman_if will be attached to a softif */
+	struct bat_priv *bat_priv = netdev_priv(soft_device);
+
 	/* route deleted */
 	if ((orig_node->router != NULL) && (neigh_node == NULL)) {
 
-		bat_dbg(DBG_ROUTES, "Deleting route towards: %pM\n",
+		bat_dbg(DBG_ROUTES, bat_priv, "Deleting route towards: %pM\n",
 			orig_node->orig);
 		hna_global_del_orig(orig_node, "originator timed out");
 
 		/* route added */
 	} else if ((orig_node->router == NULL) && (neigh_node != NULL)) {
 
-		bat_dbg(DBG_ROUTES,
+		bat_dbg(DBG_ROUTES, bat_priv,
 			"Adding route towards: %pM (via %pM)\n",
 			orig_node->orig, neigh_node->addr);
 		hna_global_add_orig(orig_node, hna_buff, hna_buff_len);
 
 		/* route changed */
 	} else {
-		bat_dbg(DBG_ROUTES,
+		bat_dbg(DBG_ROUTES, bat_priv,
 			"Changing route towards: %pM "
 			"(now via %pM - was via %pM)\n",
 			orig_node->orig, neigh_node->addr,
@@ -125,6 +128,8 @@ static int is_bidirectional_neigh(struct orig_node *orig_node,
 				struct batman_packet *batman_packet,
 				struct batman_if *if_incoming)
 {
+	/* FIXME: each orig_node->batman_if will be attached to a softif */
+	struct bat_priv *bat_priv = netdev_priv(soft_device);
 	struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
 	unsigned char total_count;
 
@@ -211,7 +216,7 @@ static int is_bidirectional_neigh(struct orig_node *orig_node,
 			      orig_neigh_node->tq_asym_penalty) /
 			     (TQ_MAX_VALUE * TQ_MAX_VALUE));
 
-	bat_dbg(DBG_BATMAN,
+	bat_dbg(DBG_BATMAN, bat_priv,
 		"bidirectional: "
 		"orig = %-15pM neigh = %-15pM => own_bcast = %2i, "
 		"real recv = %2i, local tq: %3i, asym_penalty: %3i, "
@@ -234,10 +239,12 @@ static void update_orig(struct orig_node *orig_node, struct ethhdr *ethhdr,
 			unsigned char *hna_buff, int hna_buff_len,
 			char is_duplicate)
 {
+	/* FIXME: get bat_priv */
+	struct bat_priv *bat_priv = netdev_priv(soft_device);
 	struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
 	int tmp_hna_buff_len;
 
-	bat_dbg(DBG_BATMAN, "update_originator(): "
+	bat_dbg(DBG_BATMAN, bat_priv, "update_originator(): "
 		"Searching and updating originator entry of received packet\n");
 
 	list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
@@ -269,7 +276,7 @@ static void update_orig(struct orig_node *orig_node, struct ethhdr *ethhdr,
 		if (!neigh_node)
 			return;
 	} else
-		bat_dbg(DBG_BATMAN,
+		bat_dbg(DBG_BATMAN, bat_priv,
 			"Updating existing last-hop neighbor of originator\n");
 
 	orig_node->flags = batman_packet->flags;
@@ -321,13 +328,16 @@ update_hna:
 static int window_protected(int32_t seq_num_diff,
 				unsigned long *last_reset)
 {
+	/* FIXME: each orig_node->batman_if will be attached to a softif */
+	struct bat_priv *bat_priv = netdev_priv(soft_device);
+
 	if ((seq_num_diff <= -TQ_LOCAL_WINDOW_SIZE)
 		|| (seq_num_diff >= EXPECTED_SEQNO_RANGE)) {
 		if (time_after(jiffies, *last_reset +
 			msecs_to_jiffies(RESET_PROTECTION_MS))) {
 
 			*last_reset = jiffies;
-			bat_dbg(DBG_BATMAN,
+			bat_dbg(DBG_BATMAN, bat_priv,
 				"old packet received, start protection\n");
 
 			return 0;
@@ -349,6 +359,8 @@ static char count_real_packets(struct ethhdr *ethhdr,
 			       struct batman_packet *batman_packet,
 			       struct batman_if *if_incoming)
 {
+	/* FIXME: each orig_node->batman_if will be attached to a softif */
+	struct bat_priv *bat_priv = netdev_priv(soft_device);
 	struct orig_node *orig_node;
 	struct neigh_node *tmp_neigh_node;
 	char is_duplicate = 0;
@@ -387,7 +399,8 @@ static char count_real_packets(struct ethhdr *ethhdr,
 	}
 
 	if (need_update) {
-		bat_dbg(DBG_BATMAN, "updating last_seqno: old %d, new %d\n",
+		bat_dbg(DBG_BATMAN, bat_priv,
+			"updating last_seqno: old %d, new %d\n",
 			orig_node->last_real_seqno, batman_packet->seqno);
 		orig_node->last_real_seqno = batman_packet->seqno;
 	}
@@ -540,7 +553,8 @@ void receive_bat_packet(struct ethhdr *ethhdr,
 	is_single_hop_neigh = (compare_orig(ethhdr->h_source,
 					    batman_packet->orig) ? 1 : 0);
 
-	bat_dbg(DBG_BATMAN, "Received BATMAN packet via NB: %pM, IF: %s [%s] "
+	bat_dbg(DBG_BATMAN, bat_priv,
+		"Received BATMAN packet via NB: %pM, IF: %s [%s] "
 		"(from OG: %pM, via prev OG: %pM, seqno %d, tq %d, "
 		"TTL %d, V %d, IDF %d)\n",
 		ethhdr->h_source, if_incoming->dev, if_incoming->addr_str,
@@ -569,14 +583,14 @@ void receive_bat_packet(struct ethhdr *ethhdr,
 	}
 
 	if (batman_packet->version != COMPAT_VERSION) {
-		bat_dbg(DBG_BATMAN,
+		bat_dbg(DBG_BATMAN, bat_priv,
 			"Drop packet: incompatible batman version (%i)\n",
 			batman_packet->version);
 		return;
 	}
 
 	if (is_my_addr) {
-		bat_dbg(DBG_BATMAN,
+		bat_dbg(DBG_BATMAN, bat_priv,
 			"Drop packet: received my own broadcast (sender: %pM"
 			")\n",
 			ethhdr->h_source);
@@ -584,7 +598,7 @@ void receive_bat_packet(struct ethhdr *ethhdr,
 	}
 
 	if (is_broadcast) {
-		bat_dbg(DBG_BATMAN, "Drop packet: "
+		bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: "
 		"ignoring all packets with broadcast source addr (sender: %pM"
 		")\n", ethhdr->h_source);
 		return;
@@ -614,13 +628,13 @@ void receive_bat_packet(struct ethhdr *ethhdr,
 				bit_packet_count(word);
 		}
 
-		bat_dbg(DBG_BATMAN, "Drop packet: "
+		bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: "
 			"originator packet from myself (via neighbor)\n");
 		return;
 	}
 
 	if (is_my_oldorig) {
-		bat_dbg(DBG_BATMAN,
+		bat_dbg(DBG_BATMAN, bat_priv,
 			"Drop packet: ignoring all rebroadcast echos (sender: "
 			"%pM)\n", ethhdr->h_source);
 		return;
@@ -633,14 +647,14 @@ void receive_bat_packet(struct ethhdr *ethhdr,
 	is_duplicate = count_real_packets(ethhdr, batman_packet, if_incoming);
 
 	if (is_duplicate == -1) {
-		bat_dbg(DBG_BATMAN,
+		bat_dbg(DBG_BATMAN, bat_priv,
 			"Drop packet: packet within seqno protection time "
 			"(sender: %pM)\n", ethhdr->h_source);
 		return;
 	}
 
 	if (batman_packet->tq == 0) {
-		bat_dbg(DBG_BATMAN,
+		bat_dbg(DBG_BATMAN, bat_priv,
 			"Drop packet: originator packet with tq equal 0\n");
 		return;
 	}
@@ -653,7 +667,7 @@ void receive_bat_packet(struct ethhdr *ethhdr,
 	    !(compare_orig(batman_packet->orig, batman_packet->prev_sender)) &&
 	    (compare_orig(orig_node->router->addr,
 			  orig_node->router->orig_node->router->addr))) {
-		bat_dbg(DBG_BATMAN,
+		bat_dbg(DBG_BATMAN, bat_priv,
 			"Drop packet: ignoring all rebroadcast packets that "
 			"may make me loop (sender: %pM)\n", ethhdr->h_source);
 		return;
@@ -670,7 +684,8 @@ void receive_bat_packet(struct ethhdr *ethhdr,
 	 * don't route towards it */
 	if (!is_single_hop_neigh &&
 	    (orig_neigh_node->router == NULL)) {
-		bat_dbg(DBG_BATMAN, "Drop packet: OGM via unknown neighbor!\n");
+		bat_dbg(DBG_BATMAN, bat_priv,
+			"Drop packet: OGM via unknown neighbor!\n");
 		return;
 	}
 
@@ -697,24 +712,25 @@ void receive_bat_packet(struct ethhdr *ethhdr,
 		schedule_forward_packet(orig_node, ethhdr, batman_packet,
 					1, hna_buff_len, if_incoming);
 
-		bat_dbg(DBG_BATMAN, "Forwarding packet: "
+		bat_dbg(DBG_BATMAN, bat_priv, "Forwarding packet: "
 			"rebroadcast neighbor packet with direct link flag\n");
 		return;
 	}
 
 	/* multihop originator */
 	if (!is_bidirectional) {
-		bat_dbg(DBG_BATMAN,
+		bat_dbg(DBG_BATMAN, bat_priv,
 			"Drop packet: not received via bidirectional link\n");
 		return;
 	}
 
 	if (is_duplicate) {
-		bat_dbg(DBG_BATMAN, "Drop packet: duplicate packet received\n");
+		bat_dbg(DBG_BATMAN, bat_priv,
+			"Drop packet: duplicate packet received\n");
 		return;
 	}
 
-	bat_dbg(DBG_BATMAN,
+	bat_dbg(DBG_BATMAN, bat_priv,
 		"Forwarding packet: rebroadcast originator packet\n");
 	schedule_forward_packet(orig_node, ethhdr, batman_packet,
 				0, hna_buff_len, if_incoming);