diff options
Diffstat (limited to 'net.c')
| -rw-r--r-- | net.c | 36 |
1 files changed, 32 insertions, 4 deletions
@@ -1295,6 +1295,10 @@ void do_info_usernet(Monitor *mon) #endif /* CONFIG_SLIRP */ #if defined(_WIN32) +int tap_has_ufo(VLANClientState *vc) +{ + return 0; +} int tap_has_vnet_hdr(VLANClientState *vc) { return 0; @@ -1302,7 +1306,8 @@ 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) +void tap_set_offload(VLANClientState *vc, int csum, int tso4, + int tso6, int ecn, int ufo) { } #else /* !defined(_WIN32) */ @@ -1322,6 +1327,7 @@ typedef struct TAPState { unsigned int write_poll : 1; unsigned int has_vnet_hdr : 1; unsigned int using_vnet_hdr : 1; + unsigned int has_ufo: 1; } TAPState; static int launch_script(const char *setup_script, const char *ifname, int fd); @@ -1509,6 +1515,15 @@ static int tap_set_sndbuf(TAPState *s, QemuOpts *opts) return 0; } +int tap_has_ufo(VLANClientState *vc) +{ + TAPState *s = vc->opaque; + + assert(vc->type == NET_CLIENT_TYPE_TAP); + + return s->has_ufo; +} + int tap_has_vnet_hdr(VLANClientState *vc) { TAPState *s = vc->opaque; @@ -1542,7 +1557,8 @@ 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) +void tap_set_offload(VLANClientState *vc, int csum, int tso4, + int tso6, int ecn, int ufo) { TAPState *s = vc->opaque; unsigned int offload = 0; @@ -1555,11 +1571,16 @@ void tap_set_offload(VLANClientState *vc, int csum, int tso4, int tso6, int ecn) offload |= TUN_F_TSO6; if ((tso4 || tso6) && ecn) offload |= TUN_F_TSO_ECN; + if (ufo) + offload |= TUN_F_UFO; } if (ioctl(s->fd, TUNSETOFFLOAD, offload) != 0) { - fprintf(stderr, "TUNSETOFFLOAD ioctl() failed: %s\n", - strerror(errno)); + offload &= ~TUN_F_UFO; + if (ioctl(s->fd, TUNSETOFFLOAD, offload) != 0) { + fprintf(stderr, "TUNSETOFFLOAD ioctl() failed: %s\n", + strerror(errno)); + } } } @@ -1587,6 +1608,7 @@ static TAPState *net_tap_fd_init(VLANState *vlan, int vnet_hdr) { TAPState *s; + unsigned int offload; s = qemu_mallocz(sizeof(TAPState)); s->fd = fd; @@ -1596,6 +1618,12 @@ static TAPState *net_tap_fd_init(VLANState *vlan, vlan, NULL, model, name, NULL, tap_receive, tap_receive_raw, tap_receive_iov, tap_cleanup, s); + s->has_ufo = 0; + /* Check if tap supports UFO */ + offload = TUN_F_CSUM | TUN_F_UFO; + if (ioctl(s->fd, TUNSETOFFLOAD, offload) == 0) + s->has_ufo = 1; + tap_set_offload(s->vc, 0, 0, 0, 0, 0); tap_read_poll(s, 1); return s; } |