net: new counter for tx_timeout errors in sysfs
This adds the /sys/class/net/DEV/queues/Q/tx_timeout attribute
containing the total number of timeout events on the given queue. It
is always available with CONFIG_SYSFS, independently of
CONFIG_RPS/XPS.
Credits to Stephen Hemminger for a preliminary version of this patch.
Tested:
without CONFIG_SYSFS (compilation only)
with sysfs and without CONFIG_RPS & CONFIG_XPS
with sysfs and without CONFIG_RPS
with sysfs and without CONFIG_XPS
with defaults
Signed-off-by: David Decotigny <david.decotigny@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 31da3bb..4d5698a 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -532,7 +532,7 @@
struct Qdisc *qdisc;
unsigned long state;
struct Qdisc *qdisc_sleeping;
-#if defined(CONFIG_RPS) || defined(CONFIG_XPS)
+#ifdef CONFIG_SYSFS
struct kobject kobj;
#endif
#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
@@ -547,6 +547,12 @@
* please use this field instead of dev->trans_start
*/
unsigned long trans_start;
+
+ /*
+ * Number of TX timeouts for this queue
+ * (/sys/class/net/DEV/Q/trans_timeout)
+ */
+ unsigned long trans_timeout;
} ____cacheline_aligned_in_smp;
static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
@@ -1109,9 +1115,11 @@
unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
-#if defined(CONFIG_RPS) || defined(CONFIG_XPS)
+#ifdef CONFIG_SYSFS
struct kset *queues_kset;
+#endif
+#ifdef CONFIG_RPS
struct netdev_rx_queue *_rx;
/* Number of RX queues allocated at register_netdev() time */