Add IntelRdt to CDI spec

.codespellrc

@@ -1,4 +1,3 @@
 [codespell]
 skip = .git,*.pdf,*.svg,*.sum,*.mod
-#
-# ignore-words-list =
+ignore-words-list = clos

SPEC.md

@@ -8,7 +8,7 @@
 
 ## Version
 
-This is CDI **spec** version **0.6.0**.
+This is CDI **spec** version **0.7.0**.
 
 ### Update policy
 
@@ -27,7 +27,8 @@ Released versions of the spec are available as Git tags.
 | v0.4.0 |   | Added `type` field to Mount specification |
 | v0.5.0 |   | Add `HostPath` to `DeviceNodes` |
 | v0.6.0 |   | Add `Annotations` field to `Spec` and `Device` specifications |
-|            |    | Allow dots (`.`)  in name segment of `Kind` field |
+|        |   | Allow dots (`.`)  in name segment of `Kind` field. |
+| v0.7.0 |   | Add `IntelRdt`field. |
 
 *Note*: The initial release of a **spec** with version `v0.x.0` will be tagged as
 `v0.x.0` with subsequent changes to the API applicable to this version tagged as `v0.x.y`.
@@ -82,7 +83,7 @@ The keywords "must", "must not", "required", "shall", "shall not", "should", "sh
 
 ```
 {
-    "cdiVersion": "0.6.0",
+    "cdiVersion": "0.7.0",
     "kind": "<name>",
 
     // This field contains a set of key-value pairs that may be used to provide
@@ -150,6 +151,13 @@ The keywords "must", "must not", "required", "shall", "shall not", "should", "sh
                     "timeout": <int> (optional)
                 }
             ]
+            "intelRdt": { (optional)
+                "closID": "<name>", (optional)
+                "l3CacheSchema": "string" (optional)
+                "memBwSchema": "string" (optional)
+                "enableCMT": "<boolean>" (optional)
+                "enableMBM": "<boolean>" (optional)
+            }
         }
     ]
 }
@@ -220,6 +228,12 @@ The `containerEdits` field has the following definition:
     * `args` (array of strings, OPTIONAL) with the same semantics as IEEE Std 1003.1-2008 execv's argv.
     * `env` (array of strings, OPTIONAL) with the same semantics as IEEE Std 1003.1-2008's environ.
     * `timeout` (int, OPTIONAL) is the number of seconds before aborting the hook. If set, timeout MUST be greater than zero. If not set container runtime will wait for the hook to return.
+  * `intelRdt` (object, OPTIONAL) describes the Linux [resctrl][resctrl] settings for the container (object, OPTIONAL)
+    * `closID` (string, OPTIONAL) name of the `CLOS` (Class of Service).
+    * `l3CacheSchema` (string, OPTIONAL) L3 cache allocation schema for the `CLOS`.
+    * `memBwSchema` (string, OPTIONAL) memory bandwidth allocation schema for the `CLOS`.
+    * `enableCMT` (boolean, OPTIONAL) whether to enable cache monitoring
+    * `enableMBM` (boolean, OPTIONAL) whether to enable memory bandwidth monitoring
 
 ## Error Handling
   * Kind requested is not present in any CDI file.
@@ -231,3 +245,5 @@ The `containerEdits` field has the following definition:
     This is because a resource does not need to exist when the spec is written, but it needs to exist when the container is created.
   * Hook fails to execute.
     Container runtimes should surface an error when hooks fails to execute.
+
+[resctrl]: https://docs.kernel.org/arch/x86/resctrl.html

pkg/cdi/container-edits.go

@@ -144,6 +144,13 @@ func (e *ContainerEdits) Apply(spec *oci.Spec) error {
 		}
 	}
 
+	if e.IntelRdt != nil {
+		// The specgen is missing functionality to set all parameters so we
+		// just piggy-back on it to initialize all structs and the copy over.
+		specgen.SetLinuxIntelRdtClosID(e.IntelRdt.ClosID)
+		spec.Linux.IntelRdt = e.IntelRdt.ToOCI()
+	}
+
 	return nil
 }
 
@@ -171,6 +178,11 @@ func (e *ContainerEdits) Validate() error {
 			return err
 		}
 	}
+	if e.IntelRdt != nil {
+		if err := ValidateIntelRdt(e.IntelRdt); err != nil {
+			return err
+		}
+	}
 
 	return nil
 }
@@ -192,6 +204,9 @@ func (e *ContainerEdits) Append(o *ContainerEdits) *ContainerEdits {
 	e.DeviceNodes = append(e.DeviceNodes, o.DeviceNodes...)
 	e.Hooks = append(e.Hooks, o.Hooks...)
 	e.Mounts = append(e.Mounts, o.Mounts...)
+	if o.IntelRdt != nil {
+		e.IntelRdt = o.IntelRdt
+	}
 
 	return e
 }
@@ -202,7 +217,7 @@ func (e *ContainerEdits) isEmpty() bool {
 	if e == nil {
 		return false
 	}
-	return len(e.Env)+len(e.DeviceNodes)+len(e.Hooks)+len(e.Mounts) == 0
+	return len(e.Env)+len(e.DeviceNodes)+len(e.Hooks)+len(e.Mounts) == 0 && e.IntelRdt == nil
 }
 
 // ValidateEnv validates the given environment variables.
@@ -280,6 +295,15 @@ func (m *Mount) Validate() error {
 	return nil
 }
 
+// ValidateIntelRdt validates the IntelRdt configuration.
+func ValidateIntelRdt(i *specs.IntelRdt) error {
+	// ClosID must be a valid Linux filename
+	if len(i.ClosID) >= 4096 || i.ClosID == "." || i.ClosID == ".." || strings.ContainsAny(i.ClosID, "/\n") {
+		return errors.New("invalid ClosID")
+	}
+	return nil
+}
+
 // Ensure OCI Spec hooks are not nil so we can add hooks.
 func ensureOCIHooks(spec *oci.Spec) {
 	if spec.Hooks == nil {

pkg/cdi/container-edits_test.go

@@ -245,6 +245,50 @@ func TestValidateContainerEdits(t *testing.T) {
 			},
 			invalid: true,
 		},
+		{
+			name: "valid rdt config",
+			edits: &cdi.ContainerEdits{
+				IntelRdt: &cdi.IntelRdt{
+					ClosID: "foo.bar",
+				},
+			},
+		},
+		{
+			name: "invalid rdt config, invalid closID (slash)",
+			edits: &cdi.ContainerEdits{
+				IntelRdt: &cdi.IntelRdt{
+					ClosID: "foo/bar",
+				},
+			},
+			invalid: true,
+		},
+		{
+			name: "invalid rdt config, invalid closID (dot)",
+			edits: &cdi.ContainerEdits{
+				IntelRdt: &cdi.IntelRdt{
+					ClosID: ".",
+				},
+			},
+			invalid: true,
+		},
+		{
+			name: "invalid rdt config, invalid closID (double dot)",
+			edits: &cdi.ContainerEdits{
+				IntelRdt: &cdi.IntelRdt{
+					ClosID: "..",
+				},
+			},
+			invalid: true,
+		},
+		{
+			name: "invalid rdt config, invalid closID (newline)",
+			edits: &cdi.ContainerEdits{
+				IntelRdt: &cdi.IntelRdt{
+					ClosID: "foo\nbar",
+				},
+			},
+			invalid: true,
+		},
 	} {
 		t.Run(tc.name, func(t *testing.T) {
 			edits := ContainerEdits{tc.edits}
@@ -467,6 +511,58 @@ func TestApplyContainerEdits(t *testing.T) {
 				},
 			},
 		},
+		{
+			name: "empty spec, rdt",
+			spec: &oci.Spec{},
+			edits: &cdi.ContainerEdits{
+				IntelRdt: &cdi.IntelRdt{
+					ClosID:        "clos-1",
+					L3CacheSchema: "L3:0=ff;1=ff",
+					MemBwSchema:   "MB:0=50;1=50",
+					EnableCMT:     true,
+					EnableMBM:     true,
+				},
+			},
+			result: &oci.Spec{
+				Linux: &oci.Linux{
+					IntelRdt: &oci.LinuxIntelRdt{
+						ClosID:        "clos-1",
+						L3CacheSchema: "L3:0=ff;1=ff",
+						MemBwSchema:   "MB:0=50;1=50",
+						EnableCMT:     true,
+						EnableMBM:     true,
+					},
+				},
+			},
+		},
+		{
+			name: "non-empty spec, overriding rdt",
+			spec: &oci.Spec{
+				Linux: &oci.Linux{
+					IntelRdt: &oci.LinuxIntelRdt{
+						ClosID:        "clos-1",
+						L3CacheSchema: "L3:0=ff",
+						MemBwSchema:   "MB:0=100",
+						EnableCMT:     true,
+						EnableMBM:     true,
+					},
+				},
+			},
+			edits: &cdi.ContainerEdits{
+				IntelRdt: &cdi.IntelRdt{
+					ClosID:        "clos-2",
+					L3CacheSchema: "L3:0=f",
+				},
+			},
+			result: &oci.Spec{
+				Linux: &oci.Linux{
+					IntelRdt: &oci.LinuxIntelRdt{
+						ClosID:        "clos-2",
+						L3CacheSchema: "L3:0=f",
+					},
+				},
+			},
+		},
 	} {
 		t.Run(tc.name, func(t *testing.T) {
 			edits := ContainerEdits{tc.edits}
@@ -555,6 +651,10 @@ func TestAppend(t *testing.T) {
 								Path: "/dev/dev1",
 							},
 						},
+						IntelRdt: &cdi.IntelRdt{
+							ClosID:        "clos-1",
+							L3CacheSchema: "L3:0=ff",
+						},
 					},
 				},
 				{
@@ -583,6 +683,9 @@ func TestAppend(t *testing.T) {
 								Path: "/dev/dev4",
 							},
 						},
+						IntelRdt: &cdi.IntelRdt{
+							ClosID: "clos-2",
+						},
 					},
 				},
 			},
@@ -609,6 +712,9 @@ func TestAppend(t *testing.T) {
 							Path: "/dev/dev4",
 						},
 					},
+					IntelRdt: &cdi.IntelRdt{
+						ClosID: "clos-2",
+					},
 				},
 			},
 		},

pkg/cdi/spec_test.go

@@ -669,6 +669,33 @@ func TestRequiredVersion(t *testing.T) {
 			},
 			expectedVersion: "0.6.0",
 		},
+		{
+			description: "IntelRdt requires v0.7.0",
+			spec: &cdi.Spec{
+				ContainerEdits: cdi.ContainerEdits{
+					IntelRdt: &cdi.IntelRdt{
+						ClosID: "foo",
+					},
+				},
+			},
+			expectedVersion: "0.7.0",
+		},
+		{
+			description: "IntelRdt (on devices) requires v0.7.0",
+			spec: &cdi.Spec{
+				Devices: []cdi.Device{
+					{
+						Name: "device0",
+						ContainerEdits: cdi.ContainerEdits{
+							IntelRdt: &cdi.IntelRdt{
+								ClosID: "foo",
+							},
+						},
+					},
+				},
+			},
+			expectedVersion: "0.7.0",
+		},
 	}
 
 	for _, tc := range testCases {

pkg/cdi/version.go

@@ -39,6 +39,7 @@ const (
 	v040 version = "v0.4.0"
 	v050 version = "v0.5.0"
 	v060 version = "v0.6.0"
+	v070 version = "v0.7.0"
 
 	// vEarliest is the earliest supported version of the CDI specification
 	vEarliest version = v030
@@ -54,6 +55,7 @@ var validSpecVersions = requiredVersionMap{
 	v040: requiresV040,
 	v050: requiresV050,
 	v060: requiresV060,
+	v070: requiresV070,
 }
 
 // MinimumRequiredVersion determines the minimum spec version for the input spec.
@@ -118,6 +120,21 @@ func (r requiredVersionMap) requiredVersion(spec *cdi.Spec) version {
 	return minVersion
 }
 
+// requiresV070 returns true if the spec uses v0.7.0 features
+func requiresV070(spec *cdi.Spec) bool {
+	if spec.ContainerEdits.IntelRdt != nil {
+		return true
+	}
+
+	for _, d := range spec.Devices {
+		if d.ContainerEdits.IntelRdt != nil {
+			return true
+		}
+	}
+
+	return false
+}
+
 // requiresV060 returns true if the spec uses v0.6.0 features
 func requiresV060(spec *cdi.Spec) bool {
 	// The v0.6.0 spec allows annotations to be specified at a spec level

schema/defs.json

@@ -17,6 +17,9 @@
                     "type": "string"
             }
         },
+        "FileName": {
+            "type": "string"
+        },
         "FilePath": {
             "type": "string"
         },
@@ -134,6 +137,26 @@
                     "items": {
                         "$ref": "#/definitions/Hook"
                     }
+                },
+                "intelRdt": {
+                    "type": "object",
+                    "properties": {
+                        "closID": {
+                            "$ref": "#/definitions/FileName"
+                        },
+                        "l3CacheSchema": {
+                            "type": "string"
+                        },
+                        "memBwSchema": {
+                            "type": "string"
+                        },
+                        "enableCMT": {
+                            "type": "boolean"
+                        },
+                        "enableMBM": {
+                            "type": "boolean"
+                        }
+                    }
                 }
             }
         },

specs-go/config.go

@@ -29,6 +29,7 @@ type ContainerEdits struct {
 	DeviceNodes []*DeviceNode `json:"deviceNodes,omitempty"`
 	Hooks       []*Hook       `json:"hooks,omitempty"`
 	Mounts      []*Mount      `json:"mounts,omitempty"`
+	IntelRdt    *IntelRdt     `json:"intelRdt,omitempty"`
 }
 
 // DeviceNode represents a device node that needs to be added to the OCI spec.
@@ -60,3 +61,12 @@ type Hook struct {
 	Env      []string `json:"env,omitempty"`
 	Timeout  *int     `json:"timeout,omitempty"`
 }
+
+// IntelRdt describes the Linux IntelRdt parameters to set in the OCI spec.
+type IntelRdt struct {
+	ClosID        string `json:"closID,omitempty"`
+	L3CacheSchema string `json:"l3CacheSchema,omitempty"`
+	MemBwSchema   string `json:"memBwSchema,omitempty"`
+	EnableCMT     bool   `json:"enableCMT,omitempty"`
+	EnableMBM     bool   `json:"enableMBM,omitempty"`
+}