Patchwork [41/44] net: fix TAP networking on host kernels without IFF_VNET_HDR support

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Submitter Mark McLoughlin
Date Nov. 25, 2009, 6:49 p.m.
Message ID <1259174977-26212-42-git-send-email-markmc@redhat.com>
Download mbox | patch
Permalink /patch/39435/
State New
Headers show

Comments

Mark McLoughlin - Nov. 25, 2009, 6:49 p.m.
From: Pierre Riteau <Pierre.Riteau@irisa.fr>

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>
---
 net/tap-linux.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

Patch

diff --git a/net/tap-linux.c b/net/tap-linux.c
index 0f621a2..e4f7e27 100644
--- a/net/tap-linux.c
+++ b/net/tap-linux.c
@@ -52,6 +52,8 @@  int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required
             features & IFF_VNET_HDR) {
             *vnet_hdr = 1;
             ifr.ifr_flags |= IFF_VNET_HDR;
+        } else {
+            *vnet_hdr = 0;
         }
 
         if (vnet_hdr_required && !*vnet_hdr) {