From: Maxime Chevallier maxime.chevallier@bootlin.com
[ Upstream commit b73484b2fc0d0ba84a13e9d86eb4adcae718163b ]
When parsing an ethtool flow spec to build a flow_rule, the code checks if both the vlan etype and the vlan tci are specified by the user to add a FLOW_DISSECTOR_KEY_VLAN match.
However, when the user only specified a vlan etype or a vlan tci, this check silently ignores these parameters.
For example, the following rule :
ethtool -N eth0 flow-type udp4 vlan 0x0010 action -1 loc 0
will result in no error being issued, but the equivalent rule will be created and passed to the NIC driver :
ethtool -N eth0 flow-type udp4 action -1 loc 0
In the end, neither the NIC driver using the rule nor the end user have a way to know that these keys were dropped along the way, or that incorrect parameters were entered.
This kind of check should be left to either the driver, or the ethtool flow spec layer.
This commit makes so that ethtool parameters are forwarded as-is to the NIC driver.
Since none of the users of ethtool_rx_flow_rule_create are using the VLAN dissector, I don't think this qualifies as a regression.
Fixes: eca4205f9ec3 ("ethtool: add ethtool_rx_flow_spec to flow_rule structure translator") Signed-off-by: Maxime Chevallier maxime.chevallier@bootlin.com Acked-by: Pablo Neira Ayuso pablo@gnumonks.org Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/core/ethtool.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
--- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -3008,11 +3008,12 @@ ethtool_rx_flow_rule_create(const struct const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext; const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
- if (ext_m_spec->vlan_etype && - ext_m_spec->vlan_tci) { + if (ext_m_spec->vlan_etype) { match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype; match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype; + }
+ if (ext_m_spec->vlan_tci) { match->key.vlan.vlan_id = ntohs(ext_h_spec->vlan_tci) & 0x0fff; match->mask.vlan.vlan_id = @@ -3022,7 +3023,10 @@ ethtool_rx_flow_rule_create(const struct (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13; match->mask.vlan.vlan_priority = (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13; + }
+ if (ext_m_spec->vlan_etype || + ext_m_spec->vlan_tci) { match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_VLAN); match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =