Staging: batman-adv: Fix VIS output bug for secondary interfaces

TQ and HNA records for originators on secondary interfaces were
wrongly being included on the primary interface. Ensure we output a
line for each source interface on every node, so we correctly separate
primary and secondary interface records.

Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

3 files changed, 49 insertions, 34 deletions

diff --git a/drivers/staging/batman-adv/proc.c b/drivers/staging/batman-adv/proc.c
index 7de60e84bc96..c9366bcbb360 100644
--- a/drivers/staging/batman-adv/proc.c
+++ b/drivers/staging/batman-adv/proc.c
@@ -41,7 +41,7 @@ static int proc_interfaces_read(struct seq_file *seq, void *offset)
 
 	rcu_read_lock();
 	list_for_each_entry_rcu(batman_if, &if_list, list) {
-		seq_printf(seq, "[%8s] %s %s \n",
+		seq_printf(seq, "[%8s] %s %s\n",
 			   (batman_if->if_active == IF_ACTIVE ?
 			    "active" : "inactive"),
 			   batman_if->dev,
@@ -188,18 +188,18 @@ static int proc_originators_read(struct seq_file *seq, void *offset)
 	rcu_read_lock();
 	if (list_empty(&if_list)) {
 		rcu_read_unlock();
-		seq_printf(seq, "BATMAN disabled - please specify interfaces to enable it \n");
+		seq_printf(seq, "BATMAN disabled - please specify interfaces to enable it\n");
 		goto end;
 	}
 
 	if (((struct batman_if *)if_list.next)->if_active != IF_ACTIVE) {
 		rcu_read_unlock();
-		seq_printf(seq, "BATMAN disabled - primary interface not active \n");
+		seq_printf(seq, "BATMAN disabled - primary interface not active\n");
 		goto end;
 	}
 
 	seq_printf(seq,
-		   "  %-14s (%s/%i) %17s [%10s]: %20s ... [B.A.T.M.A.N. adv %s%s, MainIF/MAC: %s/%s] \n",
+		   "  %-14s (%s/%i) %17s [%10s]: %20s ... [B.A.T.M.A.N. adv %s%s, MainIF/MAC: %s/%s]\n",
 		   "Originator", "#", TQ_MAX_VALUE, "Nexthop", "outgoingIF",
 		   "Potential nexthops", SOURCE_VERSION, REVISION_VERSION_STR,
 		   ((struct batman_if *)if_list.next)->dev,
@@ -240,7 +240,7 @@ static int proc_originators_read(struct seq_file *seq, void *offset)
 	spin_unlock_irqrestore(&orig_hash_lock, flags);
 
 	if (batman_count == 0)
-		seq_printf(seq, "No batman nodes in range ... \n");
+		seq_printf(seq, "No batman nodes in range ...\n");
 
 end:
 	return 0;
@@ -262,7 +262,7 @@ static int proc_transt_local_read(struct seq_file *seq, void *offset)
 	rcu_read_lock();
 	if (list_empty(&if_list)) {
 		rcu_read_unlock();
-		seq_printf(seq, "BATMAN disabled - please specify interfaces to enable it \n");
+		seq_printf(seq, "BATMAN disabled - please specify interfaces to enable it\n");
 		goto end;
 	}
 
@@ -294,7 +294,7 @@ static int proc_transt_global_read(struct seq_file *seq, void *offset)
 	rcu_read_lock();
 	if (list_empty(&if_list)) {
 		rcu_read_unlock();
-		seq_printf(seq, "BATMAN disabled - please specify interfaces to enable it \n");
+		seq_printf(seq, "BATMAN disabled - please specify interfaces to enable it\n");
 		goto end;
 	}
 	rcu_read_unlock();
@@ -350,9 +350,9 @@ static int proc_vis_srv_read(struct seq_file *seq, void *offset)
 {
 	int vis_server = atomic_read(&vis_mode);
 
-	seq_printf(seq, "[%c] client mode (server disabled) \n",
+	seq_printf(seq, "[%c] client mode (server disabled)\n",
 			(vis_server == VIS_TYPE_CLIENT_UPDATE) ? 'x' : ' ');
-	seq_printf(seq, "[%c] server mode (server enabled) \n",
+	seq_printf(seq, "[%c] server mode (server enabled)\n",
 			(vis_server == VIS_TYPE_SERVER_SYNC) ? 'x' : ' ');
 
 	return 0;
@@ -369,6 +369,8 @@ static int proc_vis_data_read(struct seq_file *seq, void *offset)
 	struct vis_info *info;
 	struct vis_info_entry *entries;
 	HLIST_HEAD(vis_if_list);
+	struct if_list_entry *entry;
+	struct hlist_node *pos, *n;
 	int i;
 	char tmp_addr_str[ETH_STR_LEN];
 	unsigned long flags;
@@ -387,17 +389,34 @@ static int proc_vis_data_read(struct seq_file *seq, void *offset)
 		info = hashit.bucket->data;
 		entries = (struct vis_info_entry *)
 			((char *)info + sizeof(struct vis_info));
-		addr_to_string(tmp_addr_str, info->packet.vis_orig);
-		seq_printf(seq, "%s,", tmp_addr_str);
 
 		for (i = 0; i < info->packet.entries; i++) {
-			proc_vis_read_entry(seq, &entries[i], &vis_if_list,
-					    info->packet.vis_orig);
+			if (entries[i].quality == 0)
+				continue;
+			proc_vis_insert_interface(entries[i].src, &vis_if_list,
+				compare_orig(entries[i].src,
+						info->packet.vis_orig));
 		}
 
-		/* add primary/secondary records */
-		proc_vis_read_prim_sec(seq, &vis_if_list);
-		seq_printf(seq, "\n");
+		hlist_for_each_entry(entry, pos, &vis_if_list, list) {
+			addr_to_string(tmp_addr_str, entry->addr);
+			seq_printf(seq, "%s,", tmp_addr_str);
+
+			for (i = 0; i < info->packet.entries; i++)
+				proc_vis_read_entry(seq, &entries[i],
+						entry->addr, entry->primary);
+
+			/* add primary/secondary records */
+			if (compare_orig(entry->addr, info->packet.vis_orig))
+				proc_vis_read_prim_sec(seq, &vis_if_list);
+
+			seq_printf(seq, "\n");
+		}
+
+		hlist_for_each_entry_safe(entry, pos, n, &vis_if_list, list) {
+			hlist_del(&entry->list);
+			kfree(entry);
+		}
 	}
 	spin_unlock_irqrestore(&vis_hash_lock, flags);
 
diff --git a/drivers/staging/batman-adv/vis.c b/drivers/staging/batman-adv/vis.c
index 0b5c63fbb401..222db0189a6d 100644
--- a/drivers/staging/batman-adv/vis.c
+++ b/drivers/staging/batman-adv/vis.c
@@ -86,7 +86,7 @@ static int vis_info_choose(void *data, int size)
 
 /* insert interface to the list of interfaces of one originator, if it
  * does not already exist in the list */
-static void proc_vis_insert_interface(const uint8_t *interface,
+void proc_vis_insert_interface(const uint8_t *interface,
 				      struct hlist_head *if_list,
 				      bool primary)
 {
@@ -111,39 +111,32 @@ void proc_vis_read_prim_sec(struct seq_file *seq,
 			    struct hlist_head *if_list)
 {
 	struct if_list_entry *entry;
-	struct hlist_node *pos, *n;
+	struct hlist_node *pos;
 	char tmp_addr_str[ETH_STR_LEN];
 
-	hlist_for_each_entry_safe(entry, pos, n, if_list, list) {
-		if (entry->primary) {
+	hlist_for_each_entry(entry, pos, if_list, list) {
+		if (entry->primary)
 			seq_printf(seq, "PRIMARY, ");
-		} else {
+		else {
 			addr_to_string(tmp_addr_str, entry->addr);
 			seq_printf(seq, "SEC %s, ", tmp_addr_str);
 		}
-
-		hlist_del(&entry->list);
-		kfree(entry);
 	}
 }
 
 /* read an entry  */
 void proc_vis_read_entry(struct seq_file *seq,
 				struct vis_info_entry *entry,
-				struct hlist_head *if_list,
-				uint8_t *vis_orig)
+				uint8_t *src,
+				bool primary)
 {
 	char to[40];
 
 	addr_to_string(to, entry->dest);
-	if (entry->quality == 0) {
-		proc_vis_insert_interface(vis_orig, if_list, true);
+	if (primary && entry->quality == 0)
 		seq_printf(seq, "HNA %s, ", to);
-	} else {
-		proc_vis_insert_interface(entry->src, if_list,
-					  compare_orig(entry->src, vis_orig));
+	else if (compare_orig(entry->src, src))
 		seq_printf(seq, "TQ %s %d, ", to, entry->quality);
-	}
 }
 
 /* add the info packet to the send list, if it was not
diff --git a/drivers/staging/batman-adv/vis.h b/drivers/staging/batman-adv/vis.h
index 465da4765cee..a1f92a4b101d 100644
--- a/drivers/staging/batman-adv/vis.h
+++ b/drivers/staging/batman-adv/vis.h
@@ -49,10 +49,13 @@ struct recvlist_node {
 extern struct hashtable_t *vis_hash;
 extern spinlock_t vis_hash_lock;
 
+void proc_vis_insert_interface(const uint8_t *interface,
+				      struct hlist_head *if_list,
+				      bool primary);
 void proc_vis_read_entry(struct seq_file *seq,
 				struct vis_info_entry *entry,
-				struct hlist_head *if_list,
-				uint8_t *vis_orig);
+				uint8_t *src,
+				bool primary);
 void proc_vis_read_prim_sec(struct seq_file *seq,
 			    struct hlist_head *if_list);
 void receive_server_sync_packet(struct vis_packet *vis_packet,