diff options
| author | Mark McLoughlin <markmc@redhat.com> | 2009-10-22 17:49:15 +0100 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2009-10-30 08:39:28 -0500 |
| commit | 1faac1f7d48d3f7bfa2d168b1ad5680d3288f585 (patch) | |
| tree | 0b22b4e1f779608f3917bea94a3a09d5a38096ef /net/tap-linux.c | |
| parent | dc69004c7d89afb6ede02ca9379075c062c0c091 (diff) | |
net: move tap_set_offload() code into tap-linux.c
TUNSETOFFLOAD is only available on Linux
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'net/tap-linux.c')
| -rw-r--r-- | net/tap-linux.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/net/tap-linux.c b/net/tap-linux.c index 0059404069..b6f1fad5e4 100644 --- a/net/tap-linux.c +++ b/net/tap-linux.c @@ -111,3 +111,29 @@ int tap_probe_vnet_hdr(int fd) return ifr.ifr_flags & IFF_VNET_HDR; } + +void tap_fd_set_offload(int fd, int csum, int tso4, + int tso6, int ecn, int ufo) +{ + unsigned int offload = 0; + + if (csum) { + offload |= TUN_F_CSUM; + if (tso4) + offload |= TUN_F_TSO4; + if (tso6) + offload |= TUN_F_TSO6; + if ((tso4 || tso6) && ecn) + offload |= TUN_F_TSO_ECN; + if (ufo) + offload |= TUN_F_UFO; + } + + if (ioctl(fd, TUNSETOFFLOAD, offload) != 0) { + offload &= ~TUN_F_UFO; + if (ioctl(fd, TUNSETOFFLOAD, offload) != 0) { + fprintf(stderr, "TUNSETOFFLOAD ioctl() failed: %s\n", + strerror(errno)); + } + } +} |