vmm: openapi: Add rate_limiter_config to the `DiskConfig

Signed-off-by: Bo Chen <chen.bo@intel.com>

vmm/src/api/openapi/cloud-hypervisor.yaml

@@ -607,6 +607,48 @@ components:
         args:
           type: string
 
+    TokenBucket:
+      required:
+      - size
+      - refill_time
+      type: object
+      properties:
+        size:
+          type: integer
+          format: int64
+          minimum: 0
+          description: The total number of tokens this bucket can hold.
+        one_time_burst:
+          type: integer
+          format: int64
+          minimum: 0
+          description: The initial size of a token bucket.
+        refill_time:
+          type: integer
+          format: int64
+          minimum: 0
+          description: The amount of milliseconds it takes for the bucket to refill.
+      description:
+        Defines a token bucket with a maximum capacity (_size_), an initial burst size
+        (_one_time_burst_) and an interval for refilling purposes (_refill_time_).
+        The refill-rate is derived from _size_ and _refill_time_, and it is the constant
+        rate at which the tokens replenish. The refill process only starts happening after
+        the initial burst budget is consumed.
+        Consumption from the token bucket is unbounded in speed which allows for bursts
+        bound in size by the amount of tokens available.
+        Once the token bucket is empty, consumption speed is bound by the refill-rate.
+
+    RateLimiterConfig:
+      type: object
+      properties:
+        bandwidth:
+          $ref: '#/components/schemas/TokenBucket'
+        ops:
+          $ref: '#/components/schemas/TokenBucket'
+      description:
+        Defines an IO rate limiter with independent bytes/s and ops/s limits.
+        Limits are defined by configuring each of the _bandwidth_ and _ops_ token buckets.
+
     DiskConfig:
       required:
       - path
@@ -637,6 +679,8 @@ components:
         poll_queue:
           type: boolean
           default: true
+        rate_limiter_config:
+            $ref: '#/components/schemas/RateLimiterConfig'
         id:
           type: string