Adding api for ordered multiple kernel modules (#380)

Adding list entry under Modprobe spec that defines
the sequence of loading multiple independent kernel modules
that are stored in the Module image. The entry is a list with
the modules that depends on all other modules at the head of the list.
Example: if moduleA depends on first loading moduleB, and moduleB depends on first loading moduleC
then the list will look:
ModulesLoadingOrder:
- moduleA
- moduleB
- moduleC
moduleC shoudl be loaded first, then module B, and then module C.
moduleA should be set in the ModuleName entry of the ModprobeSpec

Author: yevgeny-shnaidman

api/v1beta1/module_types.go

@@ -163,6 +163,19 @@ type ModprobeSpec struct {
 	// The firmware(s) will be copied to the host for the kernel to find them.
 	// +optional
 	FirmwarePath string `json:"firmwarePath,omitempty"`
+
+	// ModulesLoadingOrder defines the dependency between kernel modules loading, in case
+	// it was not created by depmod (independent kernel modules).
+	// The list order should be: upmost module, then the module it depends on and so on.
+	// Example: if moduleA depends on first loading moduleB, and moduleB depends on first loading moduleC
+	// the entry should look:
+	// ModulesLoadingOrder:
+	//    - moduleA
+	//    - moduleB
+	//    - moduleC
+	// In order to load all 3 modules, moduleA shoud be defined in the ModuleName parameter of this struct
+	// +optional
+	ModulesLoadingOrder []string `json:"modulesLoadingOrder,omitempty"`
 }
 
 type ModuleLoaderContainerSpec struct {

api/v1beta1/zz_generated.deepcopy.go

@@ -2362,6 +2362,20 @@ spec:
                                 description: ModuleName is the name of the Module
                                   to be loaded.
                                 type: string
+                              modulesLoadingOrder:
+                                description: 'ModulesLoadingOrder defines the dependency
+                                  between kernel modules loading, in case it was not
+                                  created by depmod (independent kernel modules).
+                                  The list order should be: upmost module, then the
+                                  module it depends on and so on. Example: if moduleA
+                                  depends on first loading moduleB, and moduleB depends
+                                  on first loading moduleC the entry should look:
+                                  ModulesLoadingOrder: - moduleA - moduleB - moduleC
+                                  In order to load all 3 modules, moduleA shoud be
+                                  defined in the ModuleName parameter of this struct'
+                                items:
+                                  type: string
+                                type: array
                               parameters:
                                 description: 'Parameters is an optional list of kernel
                                   module parameters to be provided to modprobe. They

config/crd-hub/bases/hub.kmm.sigs.x-k8s.io_managedclustermodules.yaml

@@ -2263,6 +2263,20 @@ spec:
                             description: ModuleName is the name of the Module to be
                               loaded.
                             type: string
+                          modulesLoadingOrder:
+                            description: 'ModulesLoadingOrder defines the dependency
+                              between kernel modules loading, in case it was not created
+                              by depmod (independent kernel modules). The list order
+                              should be: upmost module, then the module it depends
+                              on and so on. Example: if moduleA depends on first loading
+                              moduleB, and moduleB depends on first loading moduleC
+                              the entry should look: ModulesLoadingOrder: - moduleA
+                              - moduleB - moduleC In order to load all 3 modules,
+                              moduleA shoud be defined in the ModuleName parameter
+                              of this struct'
+                            items:
+                              type: string
+                            type: array
                           parameters:
                             description: 'Parameters is an optional list of kernel
                               module parameters to be provided to modprobe. They should