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|
package internal
import "C"
import (
"bytes"
"encoding/binary"
"fmt"
"runtime"
"ioriotng/internal/debugfs"
"ioriotng/internal/flags"
"ioriotng/internal/syncpool"
"ioriotng/internal/tracepoints"
"ioriotng/internal/types"
bpf "github.com/aquasecurity/libbpfgo"
)
type BpfMapper interface {
String() string
}
func Run(flags flags.Flags) {
// To consider for implementation!
fmt.Println(debugfs.TracepointsWithFd())
bpfModule, err := bpf.NewModuleFromFile("ioriotng.bpf.o")
if err != nil {
panic(err)
}
defer bpfModule.Close()
if err := flags.ResizeBPFMaps(bpfModule); err != nil {
panic(err)
}
if err := flags.SetBPF(bpfModule); err != nil {
panic(err)
}
if err := bpfModule.BPFLoadObject(); err != nil {
panic(err)
}
if err := tracepoints.AttachSyscalls(bpfModule); err != nil {
panic(err)
}
// 4096 channel size, minimises event drops
ch := make(chan []byte, 4096)
rb, err := bpfModule.InitRingBuf("event_map", ch)
if err != nil {
panic(err)
}
rb.Poll(300)
enterOpen := make(map[uint32]*types.OpenatEnterEvent)
enterFd := make(map[uint32]*types.FdEvent)
// To do this, extract the PID from the TID (pid_tid >> 32)
// openFiles := make(map[
for raw := range ch {
switch types.OpId(raw[0]) {
case types.OPENAT_ENTER_OP_ID:
ev := readRaw(raw, syncpool.OpenEnterEvent.Get().(*types.OpenatEnterEvent))
enterOpen[ev.PidTGid] = ev
case types.OPENAT_EXIT_OP_ID:
ev := readRaw(raw, syncpool.FdEvent.Get().(*types.FdEvent))
enterEv, ok := enterOpen[ev.PidTGid]
if !ok {
fmt.Println("Dropping", ev)
syncpool.FdEvent.Put(ev)
continue
}
duration := float64(ev.Time-enterEv.Time) / float64(1_000_000)
fmt.Println(duration, "ms", enterEv, ev)
delete(enterOpen, ev.PidTGid)
syncpool.FdEvent.Put(ev)
syncpool.OpenEnterEvent.Put(enterEv)
case types.CLOSE_ENTER_OP_ID:
ev := readRaw(raw, syncpool.FdEvent.Get().(*types.FdEvent))
enterFd[ev.PidTGid] = ev
case types.CLOSE_EXIT_OP_ID:
ev := readRaw(raw, syncpool.NullEvent.Get().(*types.NullEvent))
enterEv, ok := enterFd[ev.PidTGid]
if !ok {
fmt.Println("Dropping", ev)
syncpool.NullEvent.Put(ev)
continue
}
duration := float64(ev.Time-enterEv.Time) / float64(1_000_000)
fmt.Println(duration, "ms", enterEv, ev)
delete(enterFd, ev.PidTGid)
syncpool.NullEvent.Put(ev)
syncpool.FdEvent.Put(enterEv)
default:
panic(fmt.Sprintf("UNKNOWN Ringbuf data received len:%d raw:%v", len(raw), raw))
}
}
fmt.Println("Good bye")
}
func readRaw[T any](raw []byte, ev *T) *T {
if err := binary.Read(bytes.NewReader(raw), binary.LittleEndian, ev); err != nil {
panic(err)
}
return ev
}
func ksymArch() string {
switch runtime.GOARCH {
case "amd64":
return "x64"
case "arm64":
return "arm64"
default:
panic("unsupported architecture")
}
}
|
