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go.mod: runc v1.0.0

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Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
This commit is contained in:
Akihiro Suda
2021-06-22 15:35:10 +09:00
committed by Davanum Srinivas
parent 28bb59c080
commit f913a42755
107 changed files with 9760 additions and 1798 deletions
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149
vendor/github.com/cilium/ebpf/prog.go generated vendored
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@@ -5,6 +5,7 @@ import (
"encoding/binary"
"errors"
"fmt"
"io"
"math"
"path/filepath"
"strings"
@@ -19,6 +20,8 @@ import (
// ErrNotSupported is returned whenever the kernel doesn't support a feature.
var ErrNotSupported = internal.ErrNotSupported
var errUnsatisfiedReference = errors.New("unsatisfied reference")
// ProgramID represents the unique ID of an eBPF program.
type ProgramID uint32
@@ -41,6 +44,12 @@ type ProgramOptions struct {
// Controls the output buffer size for the verifier. Defaults to
// DefaultVerifierLogSize.
LogSize int
// An ELF containing the target BTF for this program. It is used both to
// find the correct function to trace and to apply CO-RE relocations.
// This is useful in environments where the kernel BTF is not available
// (containers) or where it is in a non-standard location. Defaults to
// use the kernel BTF from a well-known location.
TargetBTF io.ReaderAt
}
// ProgramSpec defines a Program.
@@ -125,21 +134,21 @@ func NewProgram(spec *ProgramSpec) (*Program, error) {
// Loading a program for the first time will perform
// feature detection by loading small, temporary programs.
func NewProgramWithOptions(spec *ProgramSpec, opts ProgramOptions) (*Program, error) {
btfs := make(btfHandleCache)
defer btfs.close()
handles := newHandleCache()
defer handles.close()
return newProgramWithOptions(spec, opts, btfs)
prog, err := newProgramWithOptions(spec, opts, handles)
if errors.Is(err, errUnsatisfiedReference) {
return nil, fmt.Errorf("cannot load program without loading its whole collection: %w", err)
}
return prog, err
}
func newProgramWithOptions(spec *ProgramSpec, opts ProgramOptions, btfs btfHandleCache) (*Program, error) {
func newProgramWithOptions(spec *ProgramSpec, opts ProgramOptions, handles *handleCache) (*Program, error) {
if len(spec.Instructions) == 0 {
return nil, errors.New("Instructions cannot be empty")
}
if len(spec.License) == 0 {
return nil, errors.New("License cannot be empty")
}
if spec.ByteOrder != nil && spec.ByteOrder != internal.NativeEndian {
return nil, fmt.Errorf("can't load %s program on %s", spec.ByteOrder, internal.NativeEndian)
}
@@ -157,27 +166,10 @@ func newProgramWithOptions(spec *ProgramSpec, opts ProgramOptions, btfs btfHandl
kv = v.Kernel()
}
insns := make(asm.Instructions, len(spec.Instructions))
copy(insns, spec.Instructions)
if err := fixupJumpsAndCalls(insns); err != nil {
return nil, err
}
buf := bytes.NewBuffer(make([]byte, 0, len(spec.Instructions)*asm.InstructionSize))
err := insns.Marshal(buf, internal.NativeEndian)
if err != nil {
return nil, err
}
bytecode := buf.Bytes()
insCount := uint32(len(bytecode) / asm.InstructionSize)
attr := &bpfProgLoadAttr{
progType: spec.Type,
progFlags: spec.Flags,
expectedAttachType: spec.AttachType,
insCount: insCount,
instructions: internal.NewSlicePointer(bytecode),
license: internal.NewStringPointer(spec.License),
kernelVersion: kv,
}
@@ -186,15 +178,24 @@ func newProgramWithOptions(spec *ProgramSpec, opts ProgramOptions, btfs btfHandl
attr.progName = newBPFObjName(spec.Name)
}
var err error
var targetBTF *btf.Spec
if opts.TargetBTF != nil {
targetBTF, err = handles.btfSpec(opts.TargetBTF)
if err != nil {
return nil, fmt.Errorf("load target BTF: %w", err)
}
}
var btfDisabled bool
var core btf.COREFixups
if spec.BTF != nil {
if relos, err := btf.ProgramRelocations(spec.BTF, nil); err != nil {
return nil, fmt.Errorf("CO-RE relocations: %s", err)
} else if len(relos) > 0 {
return nil, fmt.Errorf("applying CO-RE relocations: %w", ErrNotSupported)
core, err = btf.ProgramFixups(spec.BTF, targetBTF)
if err != nil {
return nil, fmt.Errorf("CO-RE relocations: %w", err)
}
handle, err := btfs.load(btf.ProgramSpec(spec.BTF))
handle, err := handles.btfHandle(btf.ProgramSpec(spec.BTF))
btfDisabled = errors.Is(err, btf.ErrNotSupported)
if err != nil && !btfDisabled {
return nil, fmt.Errorf("load BTF: %w", err)
@@ -221,8 +222,27 @@ func newProgramWithOptions(spec *ProgramSpec, opts ProgramOptions, btfs btfHandl
}
}
insns, err := core.Apply(spec.Instructions)
if err != nil {
return nil, fmt.Errorf("CO-RE fixup: %w", err)
}
if err := fixupJumpsAndCalls(insns); err != nil {
return nil, err
}
buf := bytes.NewBuffer(make([]byte, 0, len(spec.Instructions)*asm.InstructionSize))
err = insns.Marshal(buf, internal.NativeEndian)
if err != nil {
return nil, err
}
bytecode := buf.Bytes()
attr.instructions = internal.NewSlicePointer(bytecode)
attr.insCount = uint32(len(bytecode) / asm.InstructionSize)
if spec.AttachTo != "" {
target, err := resolveBTFType(spec.AttachTo, spec.Type, spec.AttachType)
target, err := resolveBTFType(targetBTF, spec.AttachTo, spec.Type, spec.AttachType)
if err != nil {
return nil, err
}
@@ -250,7 +270,7 @@ func newProgramWithOptions(spec *ProgramSpec, opts ProgramOptions, btfs btfHandl
}
logErr := err
if opts.LogLevel == 0 {
if opts.LogLevel == 0 && opts.LogSize >= 0 {
// Re-run with the verifier enabled to get better error messages.
logBuf = make([]byte, logSize)
attr.logLevel = 1
@@ -664,52 +684,45 @@ func (p *Program) ID() (ProgramID, error) {
return ProgramID(info.id), nil
}
func findKernelType(name string, typ btf.Type) error {
kernel, err := btf.LoadKernelSpec()
if err != nil {
return fmt.Errorf("can't load kernel spec: %w", err)
}
return kernel.FindType(name, typ)
}
func resolveBTFType(name string, progType ProgramType, attachType AttachType) (btf.Type, error) {
func resolveBTFType(kernel *btf.Spec, name string, progType ProgramType, attachType AttachType) (btf.Type, error) {
type match struct {
p ProgramType
a AttachType
}
target := match{progType, attachType}
switch target {
var target btf.Type
var typeName, featureName string
switch (match{progType, attachType}) {
case match{LSM, AttachLSMMac}:
var target btf.Func
err := findKernelType("bpf_lsm_"+name, &target)
if errors.Is(err, btf.ErrNotFound) {
return nil, &internal.UnsupportedFeatureError{
Name: name + " LSM hook",
}
}
if err != nil {
return nil, fmt.Errorf("resolve BTF for LSM hook %s: %w", name, err)
}
return &target, nil
target = new(btf.Func)
typeName = "bpf_lsm_" + name
featureName = name + " LSM hook"
case match{Tracing, AttachTraceIter}:
var target btf.Func
err := findKernelType("bpf_iter_"+name, &target)
if errors.Is(err, btf.ErrNotFound) {
return nil, &internal.UnsupportedFeatureError{
Name: name + " iterator",
}
}
if err != nil {
return nil, fmt.Errorf("resolve BTF for iterator %s: %w", name, err)
}
return &target, nil
target = new(btf.Func)
typeName = "bpf_iter_" + name
featureName = name + " iterator"
default:
return nil, nil
}
if kernel == nil {
var err error
kernel, err = btf.LoadKernelSpec()
if err != nil {
return nil, fmt.Errorf("load kernel spec: %w", err)
}
}
err := kernel.FindType(typeName, target)
if errors.Is(err, btf.ErrNotFound) {
return nil, &internal.UnsupportedFeatureError{
Name: featureName,
}
}
if err != nil {
return nil, fmt.Errorf("resolve BTF for %s: %w", featureName, err)
}
return target, nil
}