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authorJohn Fastabend <john.r.fastabend@intel.com>2011-06-21 07:34:42 +0000
committerDavid S. Miller <davem@davemloft.net>2011-06-21 16:06:11 -0700
commitb6db2174c59ef1e72f7bd63e0f105b1a2d7f18d3 (patch)
treeb8d08270d6d6158fd94a6fc6ccadc5978d51a673 /net/dcb
parent314b4778ed579f29b6d46ba90dbf31314c13805f (diff)
downloadlinux-b6db2174c59ef1e72f7bd63e0f105b1a2d7f18d3.tar.gz
dcb: Add ieee_dcb_setapp() to be used for IEEE 802.1Qaz APP data
This adds a setapp routine for IEEE802.1Qaz encoded APP data types. The IEEE 802.1Qaz spec encodes the priority bits differently and allows for multiple APP data entries of the same selector and protocol. Trying to force these to use the same set routines was becoming tedious. Furthermore, userspace could probably enforce the correct semantics, but expecting drivers to do this seems error prone in the firmware case. For these reasons add ieee_dcb_setapp() that understands the IEEE 802.1Qaz encoded form. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dcb')
-rw-r--r--net/dcb/dcbnl.c55
1 files changed, 51 insertions, 4 deletions
diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c
index ffba32692bd..3e3b51c4a84 100644
--- a/net/dcb/dcbnl.c
+++ b/net/dcb/dcbnl.c
@@ -1399,7 +1399,7 @@ static int dcbnl_ieee_set(struct net_device *netdev, struct nlattr **tb,
if (ops->ieee_setapp)
err = ops->ieee_setapp(netdev, app_data);
else
- err = dcb_setapp(netdev, app_data);
+ err = dcb_ieee_setapp(netdev, app_data);
if (err)
goto err;
}
@@ -1829,10 +1829,11 @@ u8 dcb_getapp(struct net_device *dev, struct dcb_app *app)
EXPORT_SYMBOL(dcb_getapp);
/**
- * ixgbe_dcbnl_setapp - add dcb application data to app list
+ * dcb_setapp - add CEE dcb application data to app list
*
- * Priority 0 is the default priority this removes applications
- * from the app list if the priority is set to zero.
+ * Priority 0 is an invalid priority in CEE spec. This routine
+ * removes applications from the app list if the priority is
+ * set to zero.
*/
u8 dcb_setapp(struct net_device *dev, struct dcb_app *new)
{
@@ -1877,6 +1878,52 @@ out:
}
EXPORT_SYMBOL(dcb_setapp);
+/**
+ * dcb_ieee_setapp - add IEEE dcb application data to app list
+ *
+ * This adds Application data to the list. Multiple application
+ * entries may exists for the same selector and protocol as long
+ * as the priorities are different.
+ */
+int dcb_ieee_setapp(struct net_device *dev, struct dcb_app *new)
+{
+ struct dcb_app_type *itr, *entry;
+ struct dcb_app_type event;
+ int err = 0;
+
+ memcpy(&event.name, dev->name, sizeof(event.name));
+ memcpy(&event.app, new, sizeof(event.app));
+
+ spin_lock(&dcb_lock);
+ /* Search for existing match and abort if found */
+ list_for_each_entry(itr, &dcb_app_list, list) {
+ if (itr->app.selector == new->selector &&
+ itr->app.protocol == new->protocol &&
+ itr->app.priority == new->priority &&
+ (strncmp(itr->name, dev->name, IFNAMSIZ) == 0)) {
+ err = -EEXIST;
+ goto out;
+ }
+ }
+
+ /* App entry does not exist add new entry */
+ entry = kmalloc(sizeof(struct dcb_app_type), GFP_ATOMIC);
+ if (!entry) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ memcpy(&entry->app, new, sizeof(*new));
+ strncpy(entry->name, dev->name, IFNAMSIZ);
+ list_add(&entry->list, &dcb_app_list);
+out:
+ spin_unlock(&dcb_lock);
+ if (!err)
+ call_dcbevent_notifiers(DCB_APP_EVENT, &event);
+ return err;
+}
+EXPORT_SYMBOL(dcb_ieee_setapp);
+
static void dcb_flushapp(void)
{
struct dcb_app_type *app;