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Support setting GSO Max Segment count

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This allows for ip link set $link gso_max_segs $maxSegs type operations.
This commit is contained in:
Nicholas Hollett 2023-03-15 21:53:40 +00:00 committed by Alessandro Boch
parent 19c6398aa9
commit 1b5637395d
2 changed files with 57 additions and 0 deletions
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27
link_linux.go
View File

@ -956,6 +956,33 @@ func LinkSetXdpFdWithFlags(link Link, fd, flags int) error {
return err
}
// LinkSetGSOMaxSegs sets the GSO maximum segment count of the link device.
// Equivalent to: `ip link set $link gso_max_segs $maxSegs`
func LinkSetGSOMaxSegs(link Link, maxSegs int) error {
return pkgHandle.LinkSetGSOMaxSegs(link, maxSegs)
}
// LinkSetGSOMaxSegs sets the GSO maximum segment count of the link device.
// Equivalent to: `ip link set $link gso_max_segs $maxSegs`
func (h *Handle) LinkSetGSOMaxSegs(link Link, maxSize int) error {
base := link.Attrs()
h.ensureIndex(base)
req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
msg.Index = int32(base.Index)
req.AddData(msg)
b := make([]byte, 4)
native.PutUint32(b, uint32(maxSize))
data := nl.NewRtAttr(unix.IFLA_GSO_MAX_SEGS, b)
req.AddData(data)
_, err := req.Execute(unix.NETLINK_ROUTE, 0)
return err
}
// LinkSetGSOMaxSize sets the IPv6 GSO maximum size of the link device.
// Equivalent to: `ip link set $link gso_max_size $maxSize`
func LinkSetGSOMaxSize(link Link, maxSize int) error {

30
link_test.go
View File

@ -2146,6 +2146,36 @@ func TestLinkSetGSOMaxSize(t *testing.T) {
}
}
func TestLinkSetGSOMaxSegs(t *testing.T) {
minKernelRequired(t, 5, 19)
tearDown := setUpNetlinkTest(t)
defer tearDown()
iface := &Veth{LinkAttrs: LinkAttrs{Name: "foo", TxQLen: testTxQLen, MTU: 1500}, PeerName: "bar"}
if err := LinkAdd(iface); err != nil {
t.Fatal(err)
}
link, err := LinkByName("foo")
if err != nil {
t.Fatal(err)
}
err = LinkSetGSOMaxSegs(link, 16)
if err != nil {
t.Fatal(err)
}
link, err = LinkByName("foo")
if err != nil {
t.Fatal(err)
}
if link.Attrs().GSOMaxSegs != 16 {
t.Fatalf("GSO max segments was not modified")
}
}
func TestLinkSetGROMaxSize(t *testing.T) {
minKernelRequired(t, 5, 19)
tearDown := setUpNetlinkTest(t)