| package link |
| |
| import ( |
| "fmt" |
| |
| "github.com/cilium/ebpf" |
| "github.com/cilium/ebpf/internal/sys" |
| ) |
| |
| type RawAttachProgramOptions struct { |
| // File descriptor to attach to. This differs for each attach type. |
| Target int |
| // Program to attach. |
| Program *ebpf.Program |
| // Program to replace (cgroups). |
| Replace *ebpf.Program |
| // Attach must match the attach type of Program (and Replace). |
| Attach ebpf.AttachType |
| // Flags control the attach behaviour. This differs for each attach type. |
| Flags uint32 |
| } |
| |
| // RawAttachProgram is a low level wrapper around BPF_PROG_ATTACH. |
| // |
| // You should use one of the higher level abstractions available in this |
| // package if possible. |
| func RawAttachProgram(opts RawAttachProgramOptions) error { |
| if err := haveProgAttach(); err != nil { |
| return err |
| } |
| |
| var replaceFd uint32 |
| if opts.Replace != nil { |
| replaceFd = uint32(opts.Replace.FD()) |
| } |
| |
| attr := sys.ProgAttachAttr{ |
| TargetFd: uint32(opts.Target), |
| AttachBpfFd: uint32(opts.Program.FD()), |
| ReplaceBpfFd: replaceFd, |
| AttachType: uint32(opts.Attach), |
| AttachFlags: uint32(opts.Flags), |
| } |
| |
| if err := sys.ProgAttach(&attr); err != nil { |
| return fmt.Errorf("can't attach program: %w", err) |
| } |
| return nil |
| } |
| |
| type RawDetachProgramOptions struct { |
| Target int |
| Program *ebpf.Program |
| Attach ebpf.AttachType |
| } |
| |
| // RawDetachProgram is a low level wrapper around BPF_PROG_DETACH. |
| // |
| // You should use one of the higher level abstractions available in this |
| // package if possible. |
| func RawDetachProgram(opts RawDetachProgramOptions) error { |
| if err := haveProgAttach(); err != nil { |
| return err |
| } |
| |
| attr := sys.ProgDetachAttr{ |
| TargetFd: uint32(opts.Target), |
| AttachBpfFd: uint32(opts.Program.FD()), |
| AttachType: uint32(opts.Attach), |
| } |
| if err := sys.ProgDetach(&attr); err != nil { |
| return fmt.Errorf("can't detach program: %w", err) |
| } |
| |
| return nil |
| } |