SYS-OSS/FRET-qemu
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net: check for TUNSETOFFLOAD support before trying to enable offload features

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This avoids the "TUNSETOFFLOAD ioctl() failed: Invalid argument" message
on kernels without TUNSETOFFLOAD support.

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 18:49:35 +00:00 committed by Anthony Liguori
parent 6720b35b81
commit 2e50326c44
1 changed files with 5 additions and 0 deletions
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5
net/tap-linux.c
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@ -131,6 +131,11 @@ void tap_fd_set_offload(int fd, int csum, int tso4,
{ {
unsigned int offload = 0; unsigned int offload = 0;
/* Check if our kernel supports TUNSETOFFLOAD */
if (ioctl(fd, TUNSETOFFLOAD, 0) != 0 && errno == EINVAL) {
return;
}
if (csum) { if (csum) {
offload |= TUN_F_CSUM; offload |= TUN_F_CSUM;
if (tso4) if (tso4)