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Pin dependency github.com/cilium/ebpf

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Use same as opencontainers/runc
This commit is contained in:
Odin Ugedal
2020-01-24 13:13:44 +01:00
parent 088ee920e0
commit 5ba2a8da09
35 changed files with 600 additions and 2731 deletions
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302
vendor/github.com/cilium/ebpf/syscalls.go generated vendored
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@@ -1,17 +1,71 @@
package ebpf
import (
"bytes"
"path/filepath"
"runtime"
"strconv"
"strings"
"unsafe"
"github.com/cilium/ebpf/internal"
"github.com/cilium/ebpf/internal/btf"
"github.com/cilium/ebpf/internal/unix"
"github.com/pkg/errors"
)
var errClosedFd = errors.New("use of closed file descriptor")
type bpfFD struct {
raw int64
}
func newBPFFD(value uint32) *bpfFD {
fd := &bpfFD{int64(value)}
runtime.SetFinalizer(fd, (*bpfFD).close)
return fd
}
func (fd *bpfFD) String() string {
return strconv.FormatInt(fd.raw, 10)
}
func (fd *bpfFD) value() (uint32, error) {
if fd.raw < 0 {
return 0, errClosedFd
}
return uint32(fd.raw), nil
}
func (fd *bpfFD) close() error {
if fd.raw < 0 {
return nil
}
value := int(fd.raw)
fd.raw = -1
fd.forget()
return unix.Close(value)
}
func (fd *bpfFD) forget() {
runtime.SetFinalizer(fd, nil)
}
func (fd *bpfFD) dup() (*bpfFD, error) {
if fd.raw < 0 {
return nil, errClosedFd
}
dup, err := unix.FcntlInt(uintptr(fd.raw), unix.F_DUPFD_CLOEXEC, 0)
if err != nil {
return nil, errors.Wrap(err, "can't dup fd")
}
return newBPFFD(uint32(dup)), nil
}
// bpfObjName is a null-terminated string made up of
// 'A-Za-z0-9_' characters.
type bpfObjName [unix.BPF_OBJ_NAME_LEN]byte
@@ -44,25 +98,21 @@ func invalidBPFObjNameChar(char rune) bool {
}
type bpfMapCreateAttr struct {
mapType MapType
keySize uint32
valueSize uint32
maxEntries uint32
flags uint32
innerMapFd uint32 // since 4.12 56f668dfe00d
numaNode uint32 // since 4.14 96eabe7a40aa
mapName bpfObjName // since 4.15 ad5b177bd73f
mapIfIndex uint32
btfFd uint32
btfKeyTypeID btf.TypeID
btfValueTypeID btf.TypeID
mapType MapType
keySize uint32
valueSize uint32
maxEntries uint32
flags uint32
innerMapFd uint32 // since 4.12 56f668dfe00d
numaNode uint32 // since 4.14 96eabe7a40aa
mapName bpfObjName // since 4.15 ad5b177bd73f
}
type bpfMapOpAttr struct {
mapFd uint32
padding uint32
key internal.Pointer
value internal.Pointer
key syscallPtr
value syscallPtr
flags uint64
}
@@ -77,7 +127,7 @@ type bpfMapInfo struct {
}
type bpfPinObjAttr struct {
fileName internal.Pointer
fileName syscallPtr
fd uint32
padding uint32
}
@@ -85,23 +135,16 @@ type bpfPinObjAttr struct {
type bpfProgLoadAttr struct {
progType ProgramType
insCount uint32
instructions internal.Pointer
license internal.Pointer
instructions syscallPtr
license syscallPtr
logLevel uint32
logSize uint32
logBuf internal.Pointer
logBuf syscallPtr
kernelVersion uint32 // since 4.1 2541517c32be
progFlags uint32 // since 4.11 e07b98d9bffe
progName bpfObjName // since 4.15 067cae47771c
progIfIndex uint32 // since 4.15 1f6f4cb7ba21
expectedAttachType AttachType // since 4.17 5e43f899b03a
progBTFFd uint32
funcInfoRecSize uint32
funcInfo internal.Pointer
funcInfoCnt uint32
lineInfoRecSize uint32
lineInfo internal.Pointer
lineInfoCnt uint32
}
type bpfProgInfo struct {
@@ -110,12 +153,12 @@ type bpfProgInfo struct {
tag [unix.BPF_TAG_SIZE]byte
jitedLen uint32
xlatedLen uint32
jited internal.Pointer
xlated internal.Pointer
jited syscallPtr
xlated syscallPtr
loadTime uint64 // since 4.15 cb4d2b3f03d8
createdByUID uint32
nrMapIDs uint32
mapIds internal.Pointer
mapIds syscallPtr
name bpfObjName
}
@@ -124,8 +167,8 @@ type bpfProgTestRunAttr struct {
retval uint32
dataSizeIn uint32
dataSizeOut uint32
dataIn internal.Pointer
dataOut internal.Pointer
dataIn syscallPtr
dataOut syscallPtr
repeat uint32
duration uint32
}
@@ -140,7 +183,7 @@ type bpfProgAlterAttr struct {
type bpfObjGetInfoByFDAttr struct {
fd uint32
infoLen uint32
info internal.Pointer // May be either bpfMapInfo or bpfProgInfo
info syscallPtr // May be either bpfMapInfo or bpfProgInfo
}
type bpfGetFDByIDAttr struct {
@@ -148,9 +191,13 @@ type bpfGetFDByIDAttr struct {
next uint32
}
func bpfProgLoad(attr *bpfProgLoadAttr) (*internal.FD, error) {
func newPtr(ptr unsafe.Pointer) syscallPtr {
return syscallPtr{ptr: ptr}
}
func bpfProgLoad(attr *bpfProgLoadAttr) (*bpfFD, error) {
for {
fd, err := internal.BPF(_ProgLoad, unsafe.Pointer(attr), unsafe.Sizeof(*attr))
fd, err := bpfCall(_ProgLoad, unsafe.Pointer(attr), unsafe.Sizeof(*attr))
// As of ~4.20 the verifier can be interrupted by a signal,
// and returns EAGAIN in that case.
if err == unix.EAGAIN {
@@ -161,54 +208,26 @@ func bpfProgLoad(attr *bpfProgLoadAttr) (*internal.FD, error) {
return nil, err
}
return internal.NewFD(uint32(fd)), nil
return newBPFFD(uint32(fd)), nil
}
}
func bpfProgAlter(cmd int, attr *bpfProgAlterAttr) error {
_, err := internal.BPF(cmd, unsafe.Pointer(attr), unsafe.Sizeof(*attr))
_, err := bpfCall(cmd, unsafe.Pointer(attr), unsafe.Sizeof(*attr))
return err
}
func bpfMapCreate(attr *bpfMapCreateAttr) (*internal.FD, error) {
fd, err := internal.BPF(_MapCreate, unsafe.Pointer(attr), unsafe.Sizeof(*attr))
func bpfMapCreate(attr *bpfMapCreateAttr) (*bpfFD, error) {
fd, err := bpfCall(_MapCreate, unsafe.Pointer(attr), unsafe.Sizeof(*attr))
if err != nil {
return nil, err
}
return internal.NewFD(uint32(fd)), nil
return newBPFFD(uint32(fd)), nil
}
var haveNestedMaps = internal.FeatureTest("nested maps", "4.12", func() bool {
inner, err := bpfMapCreate(&bpfMapCreateAttr{
mapType: Array,
keySize: 4,
valueSize: 4,
maxEntries: 1,
})
if err != nil {
return false
}
defer inner.Close()
innerFd, _ := inner.Value()
nested, err := bpfMapCreate(&bpfMapCreateAttr{
mapType: ArrayOfMaps,
keySize: 4,
valueSize: 4,
maxEntries: 1,
innerMapFd: innerFd,
})
if err != nil {
return false
}
_ = nested.Close()
return true
})
func bpfMapLookupElem(m *internal.FD, key, valueOut internal.Pointer) error {
fd, err := m.Value()
func bpfMapLookupElem(m *bpfFD, key, valueOut syscallPtr) error {
fd, err := m.value()
if err != nil {
return err
}
@@ -218,27 +237,12 @@ func bpfMapLookupElem(m *internal.FD, key, valueOut internal.Pointer) error {
key: key,
value: valueOut,
}
_, err = internal.BPF(_MapLookupElem, unsafe.Pointer(&attr), unsafe.Sizeof(attr))
_, err = bpfCall(_MapLookupElem, unsafe.Pointer(&attr), unsafe.Sizeof(attr))
return err
}
func bpfMapLookupAndDelete(m *internal.FD, key, valueOut internal.Pointer) error {
fd, err := m.Value()
if err != nil {
return err
}
attr := bpfMapOpAttr{
mapFd: fd,
key: key,
value: valueOut,
}
_, err = internal.BPF(_MapLookupAndDeleteElem, unsafe.Pointer(&attr), unsafe.Sizeof(attr))
return err
}
func bpfMapUpdateElem(m *internal.FD, key, valueOut internal.Pointer, flags uint64) error {
fd, err := m.Value()
func bpfMapUpdateElem(m *bpfFD, key, valueOut syscallPtr, flags uint64) error {
fd, err := m.value()
if err != nil {
return err
}
@@ -249,12 +253,12 @@ func bpfMapUpdateElem(m *internal.FD, key, valueOut internal.Pointer, flags uint
value: valueOut,
flags: flags,
}
_, err = internal.BPF(_MapUpdateElem, unsafe.Pointer(&attr), unsafe.Sizeof(attr))
_, err = bpfCall(_MapUpdateElem, unsafe.Pointer(&attr), unsafe.Sizeof(attr))
return err
}
func bpfMapDeleteElem(m *internal.FD, key internal.Pointer) error {
fd, err := m.Value()
func bpfMapDeleteElem(m *bpfFD, key syscallPtr) error {
fd, err := m.value()
if err != nil {
return err
}
@@ -263,12 +267,12 @@ func bpfMapDeleteElem(m *internal.FD, key internal.Pointer) error {
mapFd: fd,
key: key,
}
_, err = internal.BPF(_MapDeleteElem, unsafe.Pointer(&attr), unsafe.Sizeof(attr))
_, err = bpfCall(_MapDeleteElem, unsafe.Pointer(&attr), unsafe.Sizeof(attr))
return err
}
func bpfMapGetNextKey(m *internal.FD, key, nextKeyOut internal.Pointer) error {
fd, err := m.Value()
func bpfMapGetNextKey(m *bpfFD, key, nextKeyOut syscallPtr) error {
fd, err := m.value()
if err != nil {
return err
}
@@ -278,13 +282,13 @@ func bpfMapGetNextKey(m *internal.FD, key, nextKeyOut internal.Pointer) error {
key: key,
value: nextKeyOut,
}
_, err = internal.BPF(_MapGetNextKey, unsafe.Pointer(&attr), unsafe.Sizeof(attr))
_, err = bpfCall(_MapGetNextKey, unsafe.Pointer(&attr), unsafe.Sizeof(attr))
return err
}
const bpfFSType = 0xcafe4a11
func bpfPinObject(fileName string, fd *internal.FD) error {
func bpfPinObject(fileName string, fd *bpfFD) error {
dirName := filepath.Dir(fileName)
var statfs unix.Statfs_t
if err := unix.Statfs(dirName, &statfs); err != nil {
@@ -294,30 +298,30 @@ func bpfPinObject(fileName string, fd *internal.FD) error {
return errors.Errorf("%s is not on a bpf filesystem", fileName)
}
value, err := fd.Value()
value, err := fd.value()
if err != nil {
return err
}
_, err = internal.BPF(_ObjPin, unsafe.Pointer(&bpfPinObjAttr{
fileName: internal.NewStringPointer(fileName),
_, err = bpfCall(_ObjPin, unsafe.Pointer(&bpfPinObjAttr{
fileName: newPtr(unsafe.Pointer(&[]byte(fileName)[0])),
fd: value,
}), 16)
return errors.Wrapf(err, "pin object %s", fileName)
}
func bpfGetObject(fileName string) (*internal.FD, error) {
ptr, err := internal.BPF(_ObjGet, unsafe.Pointer(&bpfPinObjAttr{
fileName: internal.NewStringPointer(fileName),
func bpfGetObject(fileName string) (*bpfFD, error) {
ptr, err := bpfCall(_ObjGet, unsafe.Pointer(&bpfPinObjAttr{
fileName: newPtr(unsafe.Pointer(&[]byte(fileName)[0])),
}), 16)
if err != nil {
return nil, errors.Wrapf(err, "get object %s", fileName)
}
return internal.NewFD(uint32(ptr)), nil
return newBPFFD(uint32(ptr)), nil
}
func bpfGetObjectInfoByFD(fd *internal.FD, info unsafe.Pointer, size uintptr) error {
value, err := fd.Value()
func bpfGetObjectInfoByFD(fd *bpfFD, info unsafe.Pointer, size uintptr) error {
value, err := fd.value()
if err != nil {
return err
}
@@ -326,69 +330,91 @@ func bpfGetObjectInfoByFD(fd *internal.FD, info unsafe.Pointer, size uintptr) er
attr := bpfObjGetInfoByFDAttr{
fd: value,
infoLen: uint32(size),
info: internal.NewPointer(info),
info: newPtr(info),
}
_, err = internal.BPF(_ObjGetInfoByFD, unsafe.Pointer(&attr), unsafe.Sizeof(attr))
return errors.Wrapf(err, "fd %d", fd)
_, err = bpfCall(_ObjGetInfoByFD, unsafe.Pointer(&attr), unsafe.Sizeof(attr))
return errors.Wrapf(err, "fd %d", value)
}
func bpfGetProgInfoByFD(fd *internal.FD) (*bpfProgInfo, error) {
func bpfGetProgInfoByFD(fd *bpfFD) (*bpfProgInfo, error) {
var info bpfProgInfo
err := bpfGetObjectInfoByFD(fd, unsafe.Pointer(&info), unsafe.Sizeof(info))
return &info, errors.Wrap(err, "can't get program info")
}
func bpfGetMapInfoByFD(fd *internal.FD) (*bpfMapInfo, error) {
func bpfGetMapInfoByFD(fd *bpfFD) (*bpfMapInfo, error) {
var info bpfMapInfo
err := bpfGetObjectInfoByFD(fd, unsafe.Pointer(&info), unsafe.Sizeof(info))
return &info, errors.Wrap(err, "can't get map info")
return &info, errors.Wrap(err, "can't get map info:")
}
var haveObjName = internal.FeatureTest("object names", "4.15", func() bool {
name, err := newBPFObjName("feature_test")
if err != nil {
// This really is a fatal error, but it should be caught
// by the unit tests not working.
return false
}
var haveObjName = featureTest{
Fn: func() bool {
name, err := newBPFObjName("feature_test")
if err != nil {
// This really is a fatal error, but it should be caught
// by the unit tests not working.
return false
}
attr := bpfMapCreateAttr{
mapType: Array,
keySize: 4,
valueSize: 4,
maxEntries: 1,
mapName: name,
}
attr := bpfMapCreateAttr{
mapType: Array,
keySize: 4,
valueSize: 4,
maxEntries: 1,
mapName: name,
}
fd, err := bpfMapCreate(&attr)
if err != nil {
return false
}
fd, err := bpfMapCreate(&attr)
if err != nil {
return false
}
_ = fd.Close()
return true
})
_ = fd.close()
return true
},
}
func bpfGetMapFDByID(id uint32) (*internal.FD, error) {
func bpfGetMapFDByID(id uint32) (*bpfFD, error) {
// available from 4.13
attr := bpfGetFDByIDAttr{
id: id,
}
ptr, err := internal.BPF(_MapGetFDByID, unsafe.Pointer(&attr), unsafe.Sizeof(attr))
ptr, err := bpfCall(_MapGetFDByID, unsafe.Pointer(&attr), unsafe.Sizeof(attr))
if err != nil {
return nil, errors.Wrapf(err, "can't get fd for map id %d", id)
}
return internal.NewFD(uint32(ptr)), nil
return newBPFFD(uint32(ptr)), nil
}
func bpfGetProgramFDByID(id uint32) (*internal.FD, error) {
func bpfGetProgramFDByID(id uint32) (*bpfFD, error) {
// available from 4.13
attr := bpfGetFDByIDAttr{
id: id,
}
ptr, err := internal.BPF(_ProgGetFDByID, unsafe.Pointer(&attr), unsafe.Sizeof(attr))
ptr, err := bpfCall(_ProgGetFDByID, unsafe.Pointer(&attr), unsafe.Sizeof(attr))
if err != nil {
return nil, errors.Wrapf(err, "can't get fd for program id %d", id)
}
return internal.NewFD(uint32(ptr)), nil
return newBPFFD(uint32(ptr)), nil
}
func bpfCall(cmd int, attr unsafe.Pointer, size uintptr) (uintptr, error) {
r1, _, errNo := unix.Syscall(unix.SYS_BPF, uintptr(cmd), uintptr(attr), size)
runtime.KeepAlive(attr)
var err error
if errNo != 0 {
err = errNo
}
return r1, err
}
func convertCString(in []byte) string {
inLen := bytes.IndexByte(in, 0)
if inLen == -1 {
return ""
}
return string(in[:inLen])
}