1 files changed, 66 insertions, 6 deletions

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index ce0296273e76..2fa30751f362 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -58,6 +58,11 @@ module_param_named(debug_level, ipoib_debug_level, int, 0644);
 MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
 #endif
 
+struct ipoib_path_iter {
+        struct net_device *dev;
+        struct ipoib_path  path;
+};
+
 static const u8 ipv4_bcast_addr[] = {
         0x00, 0xff, 0xff, 0xff,
         0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
@@ -250,6 +255,64 @@ static void path_free(struct net_device *dev, struct ipoib_path *path)
         kfree(path);
 }
 
+#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
+
+struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev)
+{
+        struct ipoib_path_iter *iter;
+
+        iter = kmalloc(sizeof *iter, GFP_KERNEL);
+        if (!iter)
+                return NULL;
+
+        iter->dev = dev;
+        memset(iter->path.pathrec.dgid.raw, 0, 16);
+
+        if (ipoib_path_iter_next(iter)) {
+                kfree(iter);
+                return NULL;
+        }
+
+        return iter;
+}
+
+int ipoib_path_iter_next(struct ipoib_path_iter *iter)
+{
+        struct ipoib_dev_priv *priv = netdev_priv(iter->dev);
+        struct rb_node *n;
+        struct ipoib_path *path;
+        int ret = 1;
+
+        spin_lock_irq(&priv->lock);
+
+        n = rb_first(&priv->path_tree);
+
+        while (n) {
+                path = rb_entry(n, struct ipoib_path, rb_node);
+
+                if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw,
+                           sizeof (union ib_gid)) < 0) {
+                        iter->path = *path;
+                        ret = 0;
+                        break;
+                }
+
+                n = rb_next(n);
+        }
+
+        spin_unlock_irq(&priv->lock);
+
+        return ret;
+}
+
+void ipoib_path_iter_read(struct ipoib_path_iter *iter,
+                          struct ipoib_path *path)
+{
+        *path = iter->path;
+}
+
+#endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
+
 void ipoib_flush_paths(struct net_device *dev)
 {
         struct ipoib_dev_priv *priv = netdev_priv(dev);
@@ -763,7 +826,7 @@ void ipoib_dev_cleanup(struct net_device *dev)
 {
         struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv, *tcpriv;
 
-        ipoib_delete_debug_file(dev);
+        ipoib_delete_debug_files(dev);
 
         /* Delete any child interfaces first */
         list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) {
@@ -972,8 +1035,7 @@ static struct net_device *ipoib_add_port(const char *format,
                 goto register_failed;
         }
 
-        if (ipoib_create_debug_file(priv->dev))
-                goto debug_failed;
+        ipoib_create_debug_files(priv->dev);
 
         if (ipoib_add_pkey_attr(priv->dev))
                 goto sysfs_failed;
@@ -987,9 +1049,7 @@ static struct net_device *ipoib_add_port(const char *format,
         return priv->dev;
 
 sysfs_failed:
-        ipoib_delete_debug_file(priv->dev);
-
-debug_failed:
+        ipoib_delete_debug_files(priv->dev);
         unregister_netdev(priv->dev);
 
 register_failed: