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)
