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libbpf: Added AttachXDP wrapper #170

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merged 7 commits into from Jun 14, 2022
Merged

libbpf: Added AttachXDP wrapper #170

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a40aa0a
libbpf: Added AttachXDP wrapper
guyarb Jun 8, 2022
d5bb79b
Fixed naming
guyarb Jun 12, 2022
b34a445
Update libbpfgo.go
guyarb Jun 14, 2022
f1cce4c
Added new link type XDP
guyarb Jun 14, 2022
90a895e
selftest: xdp: Added selftest
guyarb Jun 14, 2022
4943566
Update selftest/xdp/main.go
grantseltzer Jun 14, 2022
2234b19
Update selftest/xdp/main.bpf.c
grantseltzer Jun 14, 2022
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20 changes: 20 additions & 0 deletions libbpfgo.go
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Expand Up @@ -1263,6 +1263,26 @@ func (p *BPFProg) SetAttachType(attachType BPFAttachType) {
C.bpf_program__set_expected_attach_type(p.prog, C.enum_bpf_attach_type(int(attachType)))
}

func (p *BPFProg) AttachXDP(deviceName string) (*BPFLink, error) {
iface, err := net.InterfaceByName(deviceName)
if err != nil {
return nil, fmt.Errorf("failed to attach program to device %s: %w", deviceName, err)
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}
link := C.bpf_program__attach_xdp(p.prog, C.int(iface.Index))
if C.IS_ERR_OR_NULL(unsafe.Pointer(link)) {
return nil, errptrError(unsafe.Pointer(link), "failed to attach xdp on device %s to program %s", deviceName, p.name)
}

bpfLink := &BPFLink{
link: link,
prog: p,
linkType: Tracepoint,
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Are we sure that this is the correct link type?

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great catch! Added new link type XDP

eventName: fmt.Sprintf("xdp-%s-%s", p.name, deviceName),
}
p.module.links = append(p.module.links, bpfLink)
return bpfLink, nil
}

func (p *BPFProg) AttachTracepoint(category, name string) (*BPFLink, error) {
tpCategory := C.CString(category)
tpName := C.CString(name)
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