2 files changed, 27 insertions, 0 deletions

diff --git a/include/net/dcbnl.h b/include/net/dcbnl.h
index 62a268531d4a..c14fd9483e46 100644
--- a/include/net/dcbnl.h
+++ b/include/net/dcbnl.h
@@ -32,6 +32,7 @@ u8 dcb_setapp(struct net_device *, struct dcb_app *);
 u8 dcb_getapp(struct net_device *, struct dcb_app *);
 int dcb_ieee_setapp(struct net_device *, struct dcb_app *);
 int dcb_ieee_delapp(struct net_device *, struct dcb_app *);
+u8 dcb_ieee_getapp_mask(struct net_device *, struct dcb_app *);
 
 int dcbnl_notify(struct net_device *dev, int event, int cmd, u32 seq, u32 pid);
 
diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c
index 196084f310d2..b7d0be01dcc4 100644
--- a/net/dcb/dcbnl.c
+++ b/net/dcb/dcbnl.c
@@ -1929,6 +1929,32 @@ out:
 EXPORT_SYMBOL(dcb_setapp);
 
 /**
+ * dcb_ieee_getapp_mask - retrieve the IEEE DCB application priority
+ *
+ * Helper routine which on success returns a non-zero 802.1Qaz user
+ * priority bitmap otherwise returns 0 to indicate the dcb_app was
+ * not found in APP list.
+ */
+u8 dcb_ieee_getapp_mask(struct net_device *dev, struct dcb_app *app)
+{
+        struct dcb_app_type *itr;
+        u8 prio = 0;
+
+        spin_lock(&dcb_lock);
+        list_for_each_entry(itr, &dcb_app_list, list) {
+                if (itr->app.selector == app->selector &&
+                    itr->app.protocol == app->protocol &&
+                    (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
+                        prio |= 1 << itr->app.priority;
+                }
+        }
+        spin_unlock(&dcb_lock);
+
+        return prio;
+}
+EXPORT_SYMBOL(dcb_ieee_getapp_mask);
+
+/**
  * dcb_ieee_setapp - add IEEE dcb application data to app list
  *
  * This adds Application data to the list. Multiple application