summaryrefslogtreecommitdiff
path: root/include/linux/ethtool.h
diff options
context:
space:
mode:
authorBen Hutchings <bhutchings@solarflare.com>2010-12-09 15:08:35 +0300
committerDavid S. Miller <davem@davemloft.net>2010-12-11 02:55:23 +0300
commite596e6e4d578f2639416e620d367a3af34814a40 (patch)
tree9ffe67f2abe3aebda15ce65ef4ff223f2db7d0f9 /include/linux/ethtool.h
parent29639059a0122d95b34b5475bd9fee3910b401a3 (diff)
downloadlinux-e596e6e4d578f2639416e620d367a3af34814a40.tar.xz
ethtool: Report link-down while interface is down
While an interface is down, many implementations of ethtool_ops::get_link, including the default, ethtool_op_get_link(), will report the last link state seen while the interface was up. In general the current physical link state is not available if the interface is down. Define ETHTOOL_GLINK to reflect whether the interface *and* any physical port have a working link, and consistently return 0 when the interface is down. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/ethtool.h')
-rw-r--r--include/linux/ethtool.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 6628a507fd3b..1908929204a9 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -691,7 +691,9 @@ struct ethtool_ops {
#define ETHTOOL_GMSGLVL 0x00000007 /* Get driver message level */
#define ETHTOOL_SMSGLVL 0x00000008 /* Set driver msg level. */
#define ETHTOOL_NWAY_RST 0x00000009 /* Restart autonegotiation. */
-#define ETHTOOL_GLINK 0x0000000a /* Get link status (ethtool_value) */
+/* Get link status for host, i.e. whether the interface *and* the
+ * physical port (if there is one) are up (ethtool_value). */
+#define ETHTOOL_GLINK 0x0000000a
#define ETHTOOL_GEEPROM 0x0000000b /* Get EEPROM data */
#define ETHTOOL_SEEPROM 0x0000000c /* Set EEPROM data. */
#define ETHTOOL_GCOALESCE 0x0000000e /* Get coalesce config */