mirror of
https://github.com/superseriousbusiness/gotosocial.git
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58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
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package link
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import (
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"fmt"
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"github.com/cilium/ebpf"
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"github.com/cilium/ebpf/internal"
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)
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type RawTracepointOptions struct {
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// Tracepoint name.
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Name string
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// Program must be of type RawTracepoint*
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Program *ebpf.Program
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}
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// AttachRawTracepoint links a BPF program to a raw_tracepoint.
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//
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// Requires at least Linux 4.17.
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func AttachRawTracepoint(opts RawTracepointOptions) (Link, error) {
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if t := opts.Program.Type(); t != ebpf.RawTracepoint && t != ebpf.RawTracepointWritable {
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return nil, fmt.Errorf("invalid program type %s, expected RawTracepoint(Writable)", t)
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}
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if opts.Program.FD() < 0 {
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return nil, fmt.Errorf("invalid program: %w", internal.ErrClosedFd)
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}
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fd, err := bpfRawTracepointOpen(&bpfRawTracepointOpenAttr{
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name: internal.NewStringPointer(opts.Name),
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fd: uint32(opts.Program.FD()),
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})
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if err != nil {
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return nil, err
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}
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return &progAttachRawTracepoint{fd: fd}, nil
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}
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type progAttachRawTracepoint struct {
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fd *internal.FD
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}
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var _ Link = (*progAttachRawTracepoint)(nil)
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func (rt *progAttachRawTracepoint) isLink() {}
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func (rt *progAttachRawTracepoint) Close() error {
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return rt.fd.Close()
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}
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func (rt *progAttachRawTracepoint) Update(_ *ebpf.Program) error {
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return fmt.Errorf("can't update raw_tracepoint: %w", ErrNotSupported)
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}
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func (rt *progAttachRawTracepoint) Pin(_ string) error {
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return fmt.Errorf("can't pin raw_tracepoint: %w", ErrNotSupported)
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}
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