fixup! config-linux: Refined JSON definitions for RDMA limits (#1)

additionalProperties is defined for the JSON Schema draft-04 in [1]
with clearer documentation in draft-07 [2].  It is supportd by
gojsonschema since xeipuuv/gojsonschema@0572d9d (added
additionalProperties with inner schema, 2013-06-21).

[1]: https://tools.ietf.org/html/draft-fge-json-schema-validation-00#section-5.4.4
[2]: https://tools.ietf.org/html/draft-handrews-json-schema-validation-00#section-6.5.6

Signed-off-by: W. Trevor King <[email protected]>

Author: wking

config-linux.md

@@ -457,40 +457,32 @@ The following parameters can be specified to set up the controller:
 
 ### <a name="configLinuxRDMA" />RDMA
 
-**`rdma`** (object, OPTIONAL) represents the cgroup subsystem `rdma`.
+**`rdmaLimits`** (object, OPTIONAL) represents the cgroup subsystem `rdma`.
 For more information, see the kernel cgroups documentation about [rdma][cgroup-v1-rdma].
 
-The following parameters can be specified to set up the controller:
+The name of the device to limit is the entry key.
+Entry values are objects with the following properties:
+
+* **`hca_handles`** *(uint32, OPTIONAL)* - specifies the maximum number of hca_objects in the cgroup
+* **`hca_objects`** *(uint32, OPTIONAL)* - specifies the maximum number of hca_handles in the cgroup
 
-* **`rdmaLimits`** *(list of objects, OPTIONAL)* - specifies a list of limit objects applicable to processes in the group.
-Limit object is a key value pair that defines limits of a device.
-    * **`hca_device`** *(string, REQUIRED)* - specifies the device name whose resources limit to be configured
-        The following parameters can be specified per-device:
-        * **`hca_handles`** *(uint32, OPTIONAL)* - specifies the maximum number of hca_objects in the cgroup
-        * **`hca_objects`** *(uint32, OPTIONAL)* - specifies the maximum number of hca_handles in the cgroup
-        You MUST specify at least one of the `hca_handles` or `hca_objects` in a given entry, and MAY specify both.
+You MUST specify at least one of the `hca_handles` or `hca_objects` in a given entry, and MAY specify both.
 
 #### Example
 
 ```json
-    "rdma": [
-                {
-		    "mlx5_1": {
-                        "hca_handles": 3,
-                        "hca_objects": 10000
-		    }
-	        },
-                {
-                    "mlx4_0": {
-                        "hca_objects": 1000
-                    }
-                },
-                {
-                    "rxe3": {
-                        "hca_objects": 10000
-                    }
-                }
-             ]
+"rdmaLimits": {
+    "mlx5_1": {
+        "hca_handles": 3,
+        "hca_objects": 10000
+    },
+    "mlx4_0": {
+        "hca_objects": 1000
+    },
+    "rxe3": {
+        "hca_objects": 10000
+    }
+}
 ```
 
 ## <a name="configLinuxIntelRdt" />IntelRdt

schema/config-linux.json

@@ -212,6 +212,12 @@
                                 }
                             }
                         }
+                    },
+                    "rdmaLimits": {
+                        "type": "object",
+                        "additionalProperties": {
+                            "$ref": "defs-linux.json#/definitions/RdmaLimit"
+                        }
                     }
                 }
             },

schema/defs-linux.json

@@ -240,6 +240,17 @@
                 "priority"
             ]
         },
+        "RdmaLimit": {
+            "type": "object",
+            "properties": {
+                "hca_handles": {
+                    "$ref": "defs.json#/definitions/uint32"
+                },
+                "hca_objects": {
+                    "$ref": "defs.json#/definitions/uint32"
+                }
+            }
+        },
         "NamespaceType": {
             "type": "string",
             "enum": [

schema/test/config/bad/linux-rdma.json

@@ -0,0 +1,15 @@
+{
+    "ociVersion": "1.0.0",
+    "root": {
+        "path": "rootfs"
+    },
+    "linux": {
+        "resources": {
+            "rdmaLimits": {
+                "mlx5_1": {
+                    "hca_handles": "not a uint32"
+                }
+            }
+        }
+    }
+}

schema/test/config/good/linux-rdma.json

@@ -0,0 +1,22 @@
+{
+    "ociVersion": "1.0.0",
+    "root": {
+        "path": "rootfs"
+    },
+    "linux": {
+        "resources": {
+            "rdmaLimits": {
+                "mlx5_1": {
+                    "hca_handles": 3,
+                    "hca_objects": 10000
+                },
+                "mlx4_0": {
+                    "hca_objects": 1000
+                },
+                "rxe3": {
+                    "hca_objects": 10000
+                }
+            }
+        }
+    }
+}

specs-go/config.go

@@ -344,7 +344,7 @@ type LinuxResources struct {
 	HugepageLimits []LinuxHugepageLimit `json:"hugepageLimits,omitempty"`
 	// Network restriction configuration
 	Network *LinuxNetwork `json:"network,omitempty"`
-	// Rdma resource restriction configuration
+	// RdmaLimits resource restriction configuration.
 	// Limits are a set of key value pairs that define RDMA resource limits,
 	// where the key is device name and value is resource limits.
 	RdmaLimits map[string]LinuxRdmaLimit `json:"rdmaLimits,omitempty"`