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| author | Ben Hutchings <bhutchings@solarflare.com> | 2010-12-09 12:08:35 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-12-10 15:55:23 -0800 |
| commit | e596e6e4d578f2639416e620d367a3af34814a40 (patch) | |
| tree | 9ffe67f2abe3aebda15ce65ef4ff223f2db7d0f9 /include/linux/ethtool.h | |
| parent | 29639059a0122d95b34b5475bd9fee3910b401a3 (diff) | |
| download | lwn-e596e6e4d578f2639416e620d367a3af34814a40.tar.gz lwn-e596e6e4d578f2639416e620d367a3af34814a40.zip | |
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.h | 4 |
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 */ |