add bpf object files

Signed-off-by: rksharma95 <[email protected]>

KubeArmor/presets/anonmapexec/preset.go

@@ -23,7 +23,7 @@ import (
 	tp "github.com/kubearmor/KubeArmor/KubeArmor/types"
 )
 
-//go:generate go run github.com/cilium/ebpf/cmd/bpf2go -cc clang anonmapexec  ../../BPF/anon_map_exec.bpf.c -type mmap_event -no-global-types -- -I/usr/include/ -O2 -g
+//go:generate go run github.com/cilium/ebpf/cmd/bpf2go -cc clang anonmapexec  ../../BPF/anonmapexec.bpf.c -type mmap_event -no-global-types -- -I/usr/include/ -O2 -g
 
 const (
 	NAME   string = "AnonMapExecutionPreset"

KubeArmor/presets/base/containers.go

@@ -0,0 +1,72 @@
+package base
+
+import (
+	"errors"
+	"os"
+	"sync"
+
+	"github.com/cilium/ebpf"
+)
+
+// NsKey struct
+type NsKey struct {
+	PidNS uint32
+	MntNS uint32
+}
+
+// ContainerVal struct
+type ContainerVal struct {
+	NsKey  NsKey
+	Policy string
+}
+
+// Containers struct
+type Containers struct {
+	BPFContainerMap *ebpf.Map
+	// ContainerID -> NsKey
+	ContainerMap     map[string]ContainerVal
+	ContainerMapLock *sync.RWMutex
+}
+
+// NewContainers func
+func NewContainers(emap *ebpf.Map) *Containers {
+	c := &Containers{}
+	c.BPFContainerMap = emap
+	c.ContainerMap = make(map[string]ContainerVal)
+	c.ContainerMapLock = new(sync.RWMutex)
+
+	return c
+}
+
+// AddContainerIDToMap function adds container to containers map
+func (c *Containers) AddContainerIDToMap(containerID string, pidns, mntns uint32) {
+	ckv := NsKey{PidNS: pidns, MntNS: mntns}
+	c.ContainerMapLock.Lock()
+	defer c.ContainerMapLock.Unlock()
+	c.ContainerMap[containerID] = ContainerVal{NsKey: ckv}
+}
+
+// DeleteContainerIDFromMap function removed container from container map and subsequently
+// from BPF Map as well returns error if failed
+func (c *Containers) DeleteContainerIDFromMap(id string) error {
+	c.ContainerMapLock.Lock()
+	defer c.ContainerMapLock.Unlock()
+
+	if val, ok := c.ContainerMap[id]; ok {
+		if err := c.DeleteContainerIDFromBPFMap(val.NsKey); err != nil {
+			return err
+		}
+		delete(c.ContainerMap, id)
+	}
+	return nil
+}
+
+// DeleteContainerIDFromBPFMap deletes the container from BPF map and returns error if failed
+func (c *Containers) DeleteContainerIDFromBPFMap(ckv NsKey) error {
+	if err := c.BPFContainerMap.Delete(ckv); err != nil {
+		if !errors.Is(err, os.ErrNotExist) {
+			return err
+		}
+	}
+	return nil
+}