Merge tag 'net-pull-request' of https://github.com/jasowang/qemu into staging

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* tag 'net-pull-request' of https://github.com/jasowang/qemu:
  net/tap: Avoid variable-length array
  net/dump: Avoid variable length array
  hw/net/rocker: Avoid variable length array
  hw/net/fsl_etsec/rings.c: Avoid variable length array
  net: add initial support for AF_XDP network backend
  tests: bump libvirt-ci for libasan and libxdp
  e1000e: rename e1000e_ba_state and e1000e_write_hdr_to_rx_buffers
  igb: packet-split descriptors support
  igb: add IPv6 extended headers traffic detection
  igb: RX payload guest writting refactoring
  igb: RX descriptors guest writting refactoring
  igb: rename E1000E_RingInfo_st
  igb: remove TCP ACK detection
  virtio-net: Add support for USO features
  virtio-net: Add USO flags to vhost support.
  tap: Add check for USO features
  tap: Add USO support to tap device.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 24 insertions, 3 deletions

diff --git a/net/tap-linux.c b/net/tap-linux.c
index f54f308d35..c7e514ecb0 100644
--- a/net/tap-linux.c
+++ b/net/tap-linux.c
@@ -173,6 +173,18 @@ int tap_probe_has_ufo(int fd)
     return 1;
 }
 
+int tap_probe_has_uso(int fd)
+{
+    unsigned offload;
+
+    offload = TUN_F_CSUM | TUN_F_USO4 | TUN_F_USO6;
+
+    if (ioctl(fd, TUNSETOFFLOAD, offload) < 0) {
+        return 0;
+    }
+    return 1;
+}
+
 /* Verify that we can assign given length */
 int tap_probe_vnet_hdr_len(int fd, int len)
 {
@@ -237,7 +249,7 @@ int tap_fd_set_vnet_be(int fd, int is_be)
 }
 
 void tap_fd_set_offload(int fd, int csum, int tso4,
-                        int tso6, int ecn, int ufo)
+                        int tso6, int ecn, int ufo, int uso4, int uso6)
 {
     unsigned int offload = 0;
 
@@ -256,13 +268,22 @@ void tap_fd_set_offload(int fd, int csum, int tso4,
             offload |= TUN_F_TSO_ECN;
         if (ufo)
             offload |= TUN_F_UFO;
+        if (uso4) {
+            offload |= TUN_F_USO4;
+        }
+        if (uso6) {
+            offload |= TUN_F_USO6;
+        }
     }
 
     if (ioctl(fd, TUNSETOFFLOAD, offload) != 0) {
-        offload &= ~TUN_F_UFO;
+        offload &= ~(TUN_F_USO4 | TUN_F_USO6);
         if (ioctl(fd, TUNSETOFFLOAD, offload) != 0) {
-            fprintf(stderr, "TUNSETOFFLOAD ioctl() failed: %s\n",
+            offload &= ~TUN_F_UFO;
+            if (ioctl(fd, TUNSETOFFLOAD, offload) != 0) {
+                fprintf(stderr, "TUNSETOFFLOAD ioctl() failed: %s\n",
                     strerror(errno));
+            }
         }
     }
 }