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| author | Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp> | 2014-02-18 21:20:09 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-03-23 21:43:59 -0700 |
| commit | 4d9c46adfdaee7290439d4474f28d771d9bcdf16 (patch) | |
| tree | 8c02264caa2019930f87b6bd14eda7a414a180f4 /net/ipv4/tcp_output.c | |
| parent | 9ed7806263aea63f3003937a406fa06780052694 (diff) | |
tun: remove bogus hardware vlan acceleration flags from vlan_features
[ Upstream commit 6671b2240c54585d4afb5286a29f1569fe5e40a8 ]
Even though only the outer vlan tag can be HW accelerated in the transmission
path, in the TUN/TAP driver vlan_features mirrors hw_features, which happens
to have the NETIF_F_HW_VLAN_?TAG_TX flags set. Because of this, during packet
tranmisssion through a stacked vlan device dev_hard_start_xmit, (incorrectly)
assuming that the vlan device supports hardware vlan acceleration, does not
add the vlan header to the skb payload and the inner vlan tags are lost
(vlan_tci contains the outer vlan tag when userspace reads the packet from
the tap device).
Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp>
Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv4/tcp_output.c')
0 files changed, 0 insertions, 0 deletions