On Wed, 2009-11-25 at 11:04 +0100, Pierre Riteau wrote: > This avoids the "TUNSETOFFLOAD ioctl() failed: Invalid argument" message > on kernels without TUNSETOFFLOAD support. > > Signed-off-by: Pierre Riteau <pierre.rit...@irisa.fr>
Acked-by: Mark McLoughlin <mar...@redhat.com> Thanks, Mark. > --- > net/tap-linux.c | 5 +++++ > 1 files changed, 5 insertions(+), 0 deletions(-) > > diff --git a/net/tap-linux.c b/net/tap-linux.c > index 0f621a2..e038e1a 100644 > --- a/net/tap-linux.c > +++ b/net/tap-linux.c > @@ -129,6 +129,11 @@ void tap_fd_set_offload(int fd, int csum, int tso4, > { > unsigned int offload = 0; > > + /* Check if our kernel supports TUNSETOFFLOAD */ > + if (ioctl(fd, TUNSETOFFLOAD, 0) != 0 && errno == EINVAL) { > + return; > + } > + > if (csum) { > offload |= TUN_F_CSUM; > if (tso4)