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package link
import (
"os"
"slices"
"testing"
"github.com/cilium/ebpf"
"github.com/cilium/ebpf/internal/testutils"
"github.com/go-quicktest/qt"
)
func TestQueryPrograms(t *testing.T) {
for name, fn := range map[string]func(*testing.T) (*ebpf.Program, Link, QueryOptions){
"cgroup": queryCgroupProgAttachFixtures,
"cgroup link": queryCgroupLinkFixtures,
"netns": queryNetNSFixtures,
"tcx": queryTCXFixtures,
} {
t.Run(name, func(t *testing.T) {
prog, link, opts := fn(t)
result, err := QueryPrograms(opts)
testutils.SkipIfNotSupported(t, err)
qt.Assert(t, qt.IsNil(err))
progInfo, err := prog.Info()
qt.Assert(t, qt.IsNil(err))
progID, _ := progInfo.ID()
i := slices.IndexFunc(result.Programs, func(ap AttachedProgram) bool {
return ap.ID == progID
})
qt.Assert(t, qt.Not(qt.Equals(i, -1)))
if name == "tcx" {
qt.Assert(t, qt.Not(qt.Equals(result.Revision, 0)))
}
if result.HaveLinkInfo() {
ap := result.Programs[i]
linkInfo, err := link.Info()
qt.Assert(t, qt.IsNil(err))
linkID, ok := ap.LinkID()
qt.Assert(t, qt.IsTrue(ok))
qt.Assert(t, qt.Equals(linkID, linkInfo.ID))
}
})
}
}
func queryCgroupProgAttachFixtures(t *testing.T) (*ebpf.Program, Link, QueryOptions) {
cgroup, prog := mustCgroupFixtures(t)
link, err := newProgAttachCgroup(cgroup, ebpf.AttachCGroupInetEgress, prog, flagAllowOverride)
if err != nil {
t.Fatal("Can't create link:", err)
}
t.Cleanup(func() {
qt.Assert(t, qt.IsNil(link.Close()))
})
return prog, nil, QueryOptions{
Target: int(cgroup.Fd()),
Attach: ebpf.AttachCGroupInetEgress,
}
}
func queryCgroupLinkFixtures(t *testing.T) (*ebpf.Program, Link, QueryOptions) {
cgroup, prog := mustCgroupFixtures(t)
link, err := newLinkCgroup(cgroup, ebpf.AttachCGroupInetEgress, prog)
testutils.SkipIfNotSupported(t, err)
if err != nil {
t.Fatal("Can't create link:", err)
}
t.Cleanup(func() {
qt.Assert(t, qt.IsNil(link.Close()))
})
return prog, nil, QueryOptions{
Target: int(cgroup.Fd()),
Attach: ebpf.AttachCGroupInetEgress,
}
}
func queryNetNSFixtures(t *testing.T) (*ebpf.Program, Link, QueryOptions) {
testutils.SkipOnOldKernel(t, "4.20", "flow_dissector program")
prog := mustLoadProgram(t, ebpf.FlowDissector, ebpf.AttachFlowDissector, "")
// RawAttachProgramOptions.Target needs to be 0, as PROG_ATTACH with namespaces
// only works with the threads current netns. Any other fd will be rejected.
if err := RawAttachProgram(RawAttachProgramOptions{
Target: 0,
Program: prog,
Attach: ebpf.AttachFlowDissector,
}); err != nil {
t.Fatal(err)
}
t.Cleanup(func() {
err := RawDetachProgram(RawDetachProgramOptions{
Target: 0,
Program: prog,
Attach: ebpf.AttachFlowDissector,
})
if err != nil {
t.Fatal(err)
}
})
netns, err := os.Open("/proc/self/ns/net")
qt.Assert(t, qt.IsNil(err))
t.Cleanup(func() { netns.Close() })
return prog, nil, QueryOptions{
Target: int(netns.Fd()),
Attach: ebpf.AttachFlowDissector,
}
}
func queryTCXFixtures(t *testing.T) (*ebpf.Program, Link, QueryOptions) {
testutils.SkipOnOldKernel(t, "6.6", "TCX link")
prog := mustLoadProgram(t, ebpf.SchedCLS, ebpf.AttachTCXIngress, "")
link, iface := mustAttachTCX(t, prog, ebpf.AttachTCXIngress)
return prog, link, QueryOptions{
Target: iface,
Attach: ebpf.AttachTCXIngress,
}
}
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