diff options
| -rw-r--r-- | net.c | 24 | ||||
| -rw-r--r-- | net.h | 1 | ||||
| -rw-r--r-- | tap-linux.h | 7 |
3 files changed, 32 insertions, 0 deletions
@@ -1302,6 +1302,9 @@ int tap_has_vnet_hdr(VLANClientState *vc) void tap_using_vnet_hdr(VLANClientState *vc, int using_vnet_hdr) { } +void tap_set_offload(VLANClientState *vc, int csum, int tso4, int tso6, int ecn) +{ +} #else /* !defined(_WIN32) */ /* Maximum GSO packet size (64k) plus plenty of room for @@ -1539,6 +1542,27 @@ static int tap_probe_vnet_hdr(int fd) return ifr.ifr_flags & IFF_VNET_HDR; } +void tap_set_offload(VLANClientState *vc, int csum, int tso4, int tso6, int ecn) +{ + TAPState *s = vc->opaque; + 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 (ioctl(s->fd, TUNSETOFFLOAD, offload) != 0) { + fprintf(stderr, "TUNSETOFFLOAD ioctl() failed: %s\n", + strerror(errno)); + } +} + static void tap_cleanup(VLANClientState *vc) { TAPState *s = vc->opaque; @@ -182,5 +182,6 @@ void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd); int tap_has_vnet_hdr(VLANClientState *vc); void tap_using_vnet_hdr(VLANClientState *vc, int using_vnet_hdr); +void tap_set_offload(VLANClientState *vc, int csum, int tso4, int tso6, int ecn); #endif diff --git a/tap-linux.h b/tap-linux.h index 8e7534829e..241cf836a4 100644 --- a/tap-linux.h +++ b/tap-linux.h @@ -22,6 +22,7 @@ /* Ioctl defines */ #define TUNSETIFF _IOW('T', 202, int) #define TUNGETFEATURES _IOR('T', 207, unsigned int) +#define TUNSETOFFLOAD _IOW('T', 208, unsigned int) #define TUNGETIFF _IOR('T', 210, unsigned int) #define TUNSETSNDBUF _IOW('T', 212, int) @@ -30,6 +31,12 @@ #define IFF_NO_PI 0x1000 #define IFF_VNET_HDR 0x4000 +/* Features for GSO (TUNSETOFFLOAD). */ +#define TUN_F_CSUM 0x01 /* You can hand me unchecksummed packets. */ +#define TUN_F_TSO4 0x02 /* I can handle TSO for IPv4 packets */ +#define TUN_F_TSO6 0x04 /* I can handle TSO for IPv6 packets */ +#define TUN_F_TSO_ECN 0x08 /* I can handle TSO with ECN bits. */ + struct virtio_net_hdr { uint8_t flags; |