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net: fix TAP networking on host kernels without IFF_VNET_HDR support

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vnet_hdr is initialized at 1 by default. We need to reset it to 0 if
the kernel doesn't support IFF_VNET_HDR.

Signed-off-by: Pierre Riteau <Pierre.Riteau@irisa.fr>
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Pierre Riteau 2009-11-25 18:49:34 +00:00 committed by Anthony Liguori
parent 0f2fbf40a9
commit 6720b35b81
1 changed files with 2 additions and 0 deletions
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2
net/tap-linux.c
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@ -52,6 +52,8 @@ int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required
features & IFF_VNET_HDR) { features & IFF_VNET_HDR) {
*vnet_hdr = 1; *vnet_hdr = 1;
ifr.ifr_flags |= IFF_VNET_HDR; ifr.ifr_flags |= IFF_VNET_HDR;
} else {
*vnet_hdr = 0;
} }
if (vnet_hdr_required && !*vnet_hdr) { if (vnet_hdr_required && !*vnet_hdr) {