@@ -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);
@@ -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
With multiple APP entries per selector and protocol drivers or stacks may want to pick a specific value or stripe traffic across many priorities. Also if an APP entry in use is deleted the stack/driver may want to choose from the existing APP entries. To facilitate this and avoid having duplicate code to walk the APP ring provide a routine dcb_ieee_getapp_mask() to return a u8 bitmask of all priorities set for the specified selector and protocol. This routine and bitmask is a helper for DCB kernel users. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> --- include/net/dcbnl.h | 1 + net/dcb/dcbnl.c | 26 ++++++++++++++++++++++++++ 2 files changed, 27 insertions(+), 0 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html