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authorBen Hutchings <ben@decadent.org.uk>2014-02-12 22:14:43 +0000
committerDavid S. Miller <davem@davemloft.net>2014-02-12 17:33:03 -0500
commit590912298c2d7d9d69c87d93af1f2f8b365f1e04 (patch)
treedd78cdf083806a613a493b563ab38f5fced988ac /include
parent4e5a62db2bed17b2b6241850f330c820f75bc3cd (diff)
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ethtool: Expand documentation of struct ethtool_stats
Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/uapi/linux/ethtool.h16
1 files changed, 13 insertions, 3 deletions
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index f246f3703ed8..e96aec0bf7c1 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -597,10 +597,20 @@ struct ethtool_test {
__u64 data[0];
};
-/* for dumping NIC-specific statistics */
+/**
+ * struct ethtool_stats - device-specific statistics
+ * @cmd: Command number = %ETHTOOL_GSTATS
+ * @n_stats: On return, the number of statistics
+ * @data: Array of statistics
+ *
+ * Users must use %ETHTOOL_GSSET_INFO or %ETHTOOL_GDRVINFO to find the
+ * number of statistics that will be returned. They must allocate a
+ * buffer of the appropriate size (8 * number of statistics)
+ * immediately following this structure.
+ */
struct ethtool_stats {
- __u32 cmd; /* ETHTOOL_GSTATS */
- __u32 n_stats; /* number of u64's being returned */
+ __u32 cmd;
+ __u32 n_stats;
__u64 data[0];
};