batman-adv: Add get_ethtool_stats() support
Added additional counters in a bat_stats structure, which are exported
through the ethtool api. The counters are specific to batman-adv and
includes:
forwarded packets and bytes
management packets and bytes (aggregated OGMs at this point)
translation table packets
New counters are added by extending "enum bat_counters" in types.h and
adding corresponding descriptive string(s) to bat_counters_strings in
soft-iface.c.
Counters are increased by calling batadv_add_counter() and incremented
by one by calling batadv_inc_counter().
Signed-off-by: Martin Hundebøll <martin@hundeboll.net>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index 630bbe8..6e0cbdc 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -138,6 +138,7 @@
#include <linux/kthread.h> /* kernel threads */
#include <linux/pkt_sched.h> /* schedule types */
#include <linux/workqueue.h> /* workqueue */
+#include <linux/percpu.h>
#include <linux/slab.h>
#include <net/sock.h> /* struct sock */
#include <linux/jiffies.h>
@@ -242,4 +243,30 @@
_dummy > smallest_signed_int(_dummy); })
#define seq_after(x, y) seq_before(y, x)
+/* Stop preemption on local cpu while incrementing the counter */
+static inline void batadv_add_counter(struct bat_priv *bat_priv, size_t idx,
+ size_t count)
+{
+ int cpu = get_cpu();
+ per_cpu_ptr(bat_priv->bat_counters, cpu)[idx] += count;
+ put_cpu();
+}
+
+#define batadv_inc_counter(b, i) batadv_add_counter(b, i, 1)
+
+/* Sum and return the cpu-local counters for index 'idx' */
+static inline uint64_t batadv_sum_counter(struct bat_priv *bat_priv, size_t idx)
+{
+ uint64_t *counters;
+ int cpu;
+ int sum = 0;
+
+ for_each_possible_cpu(cpu) {
+ counters = per_cpu_ptr(bat_priv->bat_counters, cpu);
+ sum += counters[idx];
+ }
+
+ return sum;
+}
+
#endif /* _NET_BATMAN_ADV_MAIN_H_ */