tree 15b3ea5b89ea7f75965d3ce1c4eba43d69c182c6
parent a8f9bfdf982e2b1fb9f094e4de9ab08c57f3d2fd
author Herbert Xu <herbert@gondor.apana.org.au> 1414960214 +0800
committer David S. Miller <davem@davemloft.net> 1415042826 -0500

tun: Fix TUN_PKT_STRIP setting

We set the flag TUN_PKT_STRIP if the user buffer provided is too
small to contain the entire packet plus meta-data.  However, this
has been broken ever since we added GSO meta-data.  VLAN acceleration
also has the same problem.

This patch fixes this by taking both into account when setting the
TUN_PKT_STRIP flag.

The fact that this has been broken for six years without anyone
realising means that nobody actually uses this flag.

Fixes: f43798c27684 ("tun: Allow GSO using virtio_net_hdr")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>