mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-11-30 07:32:45 +00:00
58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
|
package link
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
|
||
|
|
"github.com/cilium/ebpf"
|
||
|
|
"github.com/cilium/ebpf/internal"
|
||
|
|
)
|
||
|
|
|
||
|
|
type RawTracepointOptions struct {
|
||
|
|
// Tracepoint name.
|
||
|
|
Name string
|
||
|
|
// Program must be of type RawTracepoint*
|
||
|
|
Program *ebpf.Program
|
||
|
|
}
|
||
|
|
|
||
|
|
// AttachRawTracepoint links a BPF program to a raw_tracepoint.
|
||
|
|
//
|
||
|
|
// Requires at least Linux 4.17.
|
||
|
|
func AttachRawTracepoint(opts RawTracepointOptions) (Link, error) {
|
||
|
|
if t := opts.Program.Type(); t != ebpf.RawTracepoint && t != ebpf.RawTracepointWritable {
|
||
|
|
return nil, fmt.Errorf("invalid program type %s, expected RawTracepoint(Writable)", t)
|
||
|
|
}
|
||
|
|
if opts.Program.FD() < 0 {
|
||
|
|
return nil, fmt.Errorf("invalid program: %w", internal.ErrClosedFd)
|
||
|
|
}
|
||
|
|
|
||
|
|
fd, err := bpfRawTracepointOpen(&bpfRawTracepointOpenAttr{
|
||
|
|
name: internal.NewStringPointer(opts.Name),
|
||
|
|
fd: uint32(opts.Program.FD()),
|
||
|
|
})
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
|
||
|
|
return &progAttachRawTracepoint{fd: fd}, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
type progAttachRawTracepoint struct {
|
||
|
|
fd *internal.FD
|
||
|
|
}
|
||
|
|
|
||
|
|
var _ Link = (*progAttachRawTracepoint)(nil)
|
||
|
|
|
||
|
|
func (rt *progAttachRawTracepoint) isLink() {}
|
||
|
|
|
||
|
|
func (rt *progAttachRawTracepoint) Close() error {
|
||
|
|
return rt.fd.Close()
|
||
|
|
}
|
||
|
|
|
||
|
|
func (rt *progAttachRawTracepoint) Update(_ *ebpf.Program) error {
|
||
|
|
return fmt.Errorf("can't update raw_tracepoint: %w", ErrNotSupported)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (rt *progAttachRawTracepoint) Pin(_ string) error {
|
||
|
|
return fmt.Errorf("can't pin raw_tracepoint: %w", ErrNotSupported)
|
||
|
|
}
|