build(deps): bump github.com/containerd/cgroups/v3 from 3.0.2 to 3.0.3
Bumps [github.com/containerd/cgroups/v3](https://github.com/containerd/cgroups) from 3.0.2 to 3.0.3. - [Release notes](https://github.com/containerd/cgroups/releases) - [Commits](https://github.com/containerd/cgroups/compare/v3.0.2...v3.0.3) --- updated-dependencies: - dependency-name: github.com/containerd/cgroups/v3 dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <support@github.com>
This commit is contained in:
180
vendor/github.com/cilium/ebpf/link/kprobe_multi.go
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180
vendor/github.com/cilium/ebpf/link/kprobe_multi.go
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package link
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import (
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"errors"
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"fmt"
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"os"
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"unsafe"
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"github.com/cilium/ebpf"
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"github.com/cilium/ebpf/asm"
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"github.com/cilium/ebpf/internal"
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"github.com/cilium/ebpf/internal/sys"
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"github.com/cilium/ebpf/internal/unix"
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)
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// KprobeMultiOptions defines additional parameters that will be used
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// when opening a KprobeMulti Link.
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type KprobeMultiOptions struct {
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// Symbols takes a list of kernel symbol names to attach an ebpf program to.
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//
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// Mutually exclusive with Addresses.
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Symbols []string
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// Addresses takes a list of kernel symbol addresses in case they can not
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// be referred to by name.
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//
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// Note that only start addresses can be specified, since the fprobe API
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// limits the attach point to the function entry or return.
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//
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// Mutually exclusive with Symbols.
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Addresses []uintptr
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// Cookies specifies arbitrary values that can be fetched from an eBPF
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// program via `bpf_get_attach_cookie()`.
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//
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// If set, its length should be equal to the length of Symbols or Addresses.
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// Each Cookie is assigned to the Symbol or Address specified at the
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// corresponding slice index.
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Cookies []uint64
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}
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// KprobeMulti attaches the given eBPF program to the entry point of a given set
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// of kernel symbols.
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//
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// The difference with Kprobe() is that multi-kprobe accomplishes this in a
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// single system call, making it significantly faster than attaching many
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// probes one at a time.
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//
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// Requires at least Linux 5.18.
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func KprobeMulti(prog *ebpf.Program, opts KprobeMultiOptions) (Link, error) {
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return kprobeMulti(prog, opts, 0)
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}
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// KretprobeMulti attaches the given eBPF program to the return point of a given
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// set of kernel symbols.
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//
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// The difference with Kretprobe() is that multi-kprobe accomplishes this in a
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// single system call, making it significantly faster than attaching many
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// probes one at a time.
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//
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// Requires at least Linux 5.18.
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func KretprobeMulti(prog *ebpf.Program, opts KprobeMultiOptions) (Link, error) {
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return kprobeMulti(prog, opts, unix.BPF_F_KPROBE_MULTI_RETURN)
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}
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func kprobeMulti(prog *ebpf.Program, opts KprobeMultiOptions, flags uint32) (Link, error) {
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if prog == nil {
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return nil, errors.New("cannot attach a nil program")
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}
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syms := uint32(len(opts.Symbols))
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addrs := uint32(len(opts.Addresses))
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cookies := uint32(len(opts.Cookies))
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if syms == 0 && addrs == 0 {
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return nil, fmt.Errorf("one of Symbols or Addresses is required: %w", errInvalidInput)
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}
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if syms != 0 && addrs != 0 {
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return nil, fmt.Errorf("Symbols and Addresses are mutually exclusive: %w", errInvalidInput)
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}
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if cookies > 0 && cookies != syms && cookies != addrs {
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return nil, fmt.Errorf("Cookies must be exactly Symbols or Addresses in length: %w", errInvalidInput)
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}
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if err := haveBPFLinkKprobeMulti(); err != nil {
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return nil, err
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}
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attr := &sys.LinkCreateKprobeMultiAttr{
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ProgFd: uint32(prog.FD()),
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AttachType: sys.BPF_TRACE_KPROBE_MULTI,
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KprobeMultiFlags: flags,
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}
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switch {
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case syms != 0:
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attr.Count = syms
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attr.Syms = sys.NewStringSlicePointer(opts.Symbols)
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case addrs != 0:
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attr.Count = addrs
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attr.Addrs = sys.NewPointer(unsafe.Pointer(&opts.Addresses[0]))
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}
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if cookies != 0 {
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attr.Cookies = sys.NewPointer(unsafe.Pointer(&opts.Cookies[0]))
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}
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fd, err := sys.LinkCreateKprobeMulti(attr)
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if errors.Is(err, unix.ESRCH) {
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return nil, fmt.Errorf("couldn't find one or more symbols: %w", os.ErrNotExist)
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}
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if errors.Is(err, unix.EINVAL) {
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return nil, fmt.Errorf("%w (missing kernel symbol or prog's AttachType not AttachTraceKprobeMulti?)", err)
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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 &kprobeMultiLink{RawLink{fd, ""}}, nil
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}
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type kprobeMultiLink struct {
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RawLink
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}
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var _ Link = (*kprobeMultiLink)(nil)
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func (kml *kprobeMultiLink) Update(prog *ebpf.Program) error {
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return fmt.Errorf("update kprobe_multi: %w", ErrNotSupported)
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}
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func (kml *kprobeMultiLink) Pin(string) error {
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return fmt.Errorf("pin kprobe_multi: %w", ErrNotSupported)
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}
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func (kml *kprobeMultiLink) Unpin() error {
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return fmt.Errorf("unpin kprobe_multi: %w", ErrNotSupported)
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}
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var haveBPFLinkKprobeMulti = internal.NewFeatureTest("bpf_link_kprobe_multi", "5.18", func() error {
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prog, err := ebpf.NewProgram(&ebpf.ProgramSpec{
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Name: "probe_kpm_link",
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Type: ebpf.Kprobe,
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Instructions: asm.Instructions{
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asm.Mov.Imm(asm.R0, 0),
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asm.Return(),
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},
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AttachType: ebpf.AttachTraceKprobeMulti,
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License: "MIT",
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})
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if errors.Is(err, unix.E2BIG) {
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// Kernel doesn't support AttachType field.
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return internal.ErrNotSupported
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}
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if err != nil {
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return err
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}
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defer prog.Close()
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fd, err := sys.LinkCreateKprobeMulti(&sys.LinkCreateKprobeMultiAttr{
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ProgFd: uint32(prog.FD()),
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AttachType: sys.BPF_TRACE_KPROBE_MULTI,
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Count: 1,
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Syms: sys.NewStringSlicePointer([]string{"vprintk"}),
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})
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switch {
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case errors.Is(err, unix.EINVAL):
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return internal.ErrNotSupported
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// If CONFIG_FPROBE isn't set.
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case errors.Is(err, unix.EOPNOTSUPP):
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return internal.ErrNotSupported
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case err != nil:
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return err
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}
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fd.Close()
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return nil
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})
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