pkg:api: add Cgroup message definition

Add cgroup message definition that will be sent from bpf side.

Signed-off-by: Djalal Harouni <[email protected]>

Author: tixxdz

pkg/api/processapi/processapi.go

@@ -12,6 +12,12 @@ const (
 	// cgroup of the task
 	DOCKER_ID_LENGTH = 128
 
+	// Length of the cgroup name as it is returned from BPF side
+	CGROUP_NAME_LENGTH = 128
+
+	// Length of the cgroup path as it is returned from BPF side
+	CGROUP_PATH_LENGTH = 4096
+
 	MSG_SIZEOF_MAXARG = 100
 	MSG_SIZEOF_EXECVE = 32
 	MSG_SIZEOF_CWD    = 256
@@ -138,3 +144,29 @@ type MsgExitEvent struct {
 	ProcessKey MsgExecveKey `align:"current"`
 	Info       MsgExitInfo  `align:"info"`
 }
+
+// MsgCgroupData is complementary cgroup data that is collected from
+// BPF side on various cgroup events.
+type MsgCgroupData struct {
+	State       int32  // State of cgroup
+	HierarchyId uint32 // Unique id for the hierarchy
+	Level       uint32 // The depth this cgroup is at
+	Pad         uint32
+	Name        [CGROUP_NAME_LENGTH]byte // Cgroup kernfs_node name
+}
+
+// MsgCgroupEvent is the data that is sent from BPF side on cgroup events
+// into ring buffer.
+type MsgCgroupEvent struct {
+	Common        MsgCommon
+	Parent        MsgExecveKey
+	CgrpOp        uint32 // Current cgroup operation
+	PID           uint32
+	NSPID         uint32
+	Flags         uint32
+	Ktime         uint64
+	CgrpidTracker uint64                   // The tracking cgroup ID
+	Cgrpid        uint64                   // Current cgroup ID
+	CgrpData      MsgCgroupData            // Complementary cgroup data
+	Path          [CGROUP_PATH_LENGTH]byte // Full path of the cgroup on fs
+}