Patchwork [net-next-2.6] ixgbe: Fix erroneous display of stats by ethtool -S

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Submitter Ajit Khaparde
Date Oct. 13, 2009, 11:47 a.m.
Message ID <20091013114721.GA2671@serverengines.com>
Download mbox | patch
Permalink /patch/35850/
State Accepted
Delegated to: David Miller
Headers show

Comments

Ajit Khaparde - Oct. 13, 2009, 11:47 a.m.
Commit 59aa3cc4 overlooked the way offsets for netdev stats were considered.
Because of this some of the stats shown by ethtool -S were wrong.
This patch fixes it.

Signed-off-by: Ajit Khaparde <ajitk@serverengines.com>
---
 drivers/net/ixgbe/ixgbe_ethtool.c |   27 ++++++++++++++++++++++-----
 1 files changed, 22 insertions(+), 5 deletions(-)
David Miller - Oct. 13, 2009, 7:10 p.m.
From: Ajit Khaparde <ajitk@serverengines.com>
Date: Tue, 13 Oct 2009 17:17:33 +0530

> Commit 59aa3cc4 overlooked the way offsets for netdev stats were considered.
> Because of this some of the stats shown by ethtool -S were wrong.
> This patch fixes it.
> 
> Signed-off-by: Ajit Khaparde <ajitk@serverengines.com>

Applied.
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Patch

diff --git a/drivers/net/ixgbe/ixgbe_ethtool.c b/drivers/net/ixgbe/ixgbe_ethtool.c
index 987b41c..08eccf4 100644
--- a/drivers/net/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ixgbe/ixgbe_ethtool.c
@@ -40,16 +40,22 @@ 
 
 #define IXGBE_ALL_RAR_ENTRIES 16
 
+enum {NETDEV_STATS, IXGBE_STATS};
+
 struct ixgbe_stats {
 	char stat_string[ETH_GSTRING_LEN];
+	int type;
 	int sizeof_stat;
 	int stat_offset;
 };
 
-#define IXGBE_STAT(m) sizeof(((struct ixgbe_adapter *)0)->m), \
-                             offsetof(struct ixgbe_adapter, m)
-#define IXGBE_NETDEV_STAT(m) sizeof(((struct net_device *)0)->m), \
-                             offsetof(struct net_device, m)
+#define IXGBE_STAT(m)		IXGBE_STATS, \
+				sizeof(((struct ixgbe_adapter *)0)->m), \
+				offsetof(struct ixgbe_adapter, m)
+#define IXGBE_NETDEV_STAT(m)	NETDEV_STATS, \
+				sizeof(((struct net_device *)0)->m), \
+				offsetof(struct net_device, m)
+
 static struct ixgbe_stats ixgbe_gstrings_stats[] = {
 	{"rx_packets", IXGBE_NETDEV_STAT(stats.rx_packets)},
 	{"tx_packets", IXGBE_NETDEV_STAT(stats.tx_packets)},
@@ -931,10 +937,21 @@  static void ixgbe_get_ethtool_stats(struct net_device *netdev,
 	int stat_count = sizeof(struct ixgbe_queue_stats) / sizeof(u64);
 	int j, k;
 	int i;
+	char *p = NULL;
 
 	ixgbe_update_stats(adapter);
 	for (i = 0; i < IXGBE_GLOBAL_STATS_LEN; i++) {
-		char *p = (char *)adapter + ixgbe_gstrings_stats[i].stat_offset;
+		switch (ixgbe_gstrings_stats[i].type) {
+		case NETDEV_STATS:
+			p = (char *) netdev +
+					ixgbe_gstrings_stats[i].stat_offset;
+			break;
+		case IXGBE_STATS:
+			p = (char *) adapter +
+					ixgbe_gstrings_stats[i].stat_offset;
+			break;
+		}
+
 		data[i] = (ixgbe_gstrings_stats[i].sizeof_stat ==
 		           sizeof(u64)) ? *(u64 *)p : *(u32 *)p;
 	}