net/devlink/resource.c

10  * struct devlink_resource - devlink resource
11  * @name: name of the resource
13  * @size: size of the resource
14  * @size_new: updated size of the resource, reload is needed
15  * @size_valid: valid in case the total size of the resource is valid
17  * @parent: parent resource
40 		      struct devlink_resource *resource, u64 resource_id)
44 	if (resource)
45 		resource_list = &resource->resource_list;
49 	list_for_each_entry(resource, resource_list, list) {
52 		if (resource->id == resource_id)
53 			return resource;
55 		child_resource = devlink_resource_find(devlink, resource,
64 devlink_resource_validate_children(struct devlink_resource *resource)
70 	if (list_empty(&resource->resource_list))
73 	list_for_each_entry(child_resource, &resource->resource_list, list)
76 	if (parts_size > resource->size_new)
79 	resource->size_valid = size_valid;
83 devlink_resource_validate_size(struct devlink_resource *resource, u64 size,
89 	if (size > resource->size_params.size_max) {
94 	if (size < resource->size_params.size_min) {
99 	div64_u64_rem(size, resource->size_params.size_granularity, &reminder);
111 	struct devlink_resource *resource;
121 	resource = devlink_resource_find(devlink, NULL, resource_id);
122 	if (!resource)
126 	err = devlink_resource_validate_size(resource, size, info->extack);
130 	resource->size_new = size;
131 	devlink_resource_validate_children(resource);
132 	if (resource->parent)
133 		devlink_resource_validate_children(resource->parent);
138 devlink_resource_size_params_put(struct devlink_resource *resource,
143 	size_params = &resource->size_params;
155 static int devlink_resource_occ_put(struct devlink_resource *resource,
158 	if (!resource->occ_get)
161 				  resource->occ_get(resource->occ_get_priv));
165 				struct devlink_resource *resource)
175 	if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) ||
176 	    devlink_nl_put_u64(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size) ||
177 	    devlink_nl_put_u64(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id))
179 	if (resource->size != resource->size_new &&
181 			       resource->size_new))
183 	if (devlink_resource_occ_put(resource, skb))
185 	if (devlink_resource_size_params_put(resource, skb))
187 	if (list_empty(&resource->resource_list))
191 		       resource->size_valid))
199 	list_for_each_entry(child_resource, &resource->resource_list, list) {
220 	struct devlink_resource *resource;
229 	resource = list_first_entry(&devlink->resource_list,
253 	list_for_each_entry_from(resource, &devlink->resource_list, list) {
254 		err = devlink_resource_put(devlink, skb, resource);
296 			       struct devlink_resource *resource,
302 	if (resource)
303 		resource_list = &resource->resource_list;
307 	list_for_each_entry(resource, resource_list, list) {
308 		if (!resource->size_valid)
310 		err = devlink_resources_validate(devlink, resource, info);
318  * devl_resource_register - devlink resource register
321  * @resource_name: resource's name
322  * @resource_size: resource's size
323  * @resource_id: resource's id
324  * @parent_resource_id: resource's parent id
329  * Documentation/networking/devlink/devlink-resource.rst
338 	struct devlink_resource *resource;
346 	resource = devlink_resource_find(devlink, NULL, resource_id);
347 	if (resource)
350 	resource = kzalloc(sizeof(*resource), GFP_KERNEL);
351 	if (!resource)
363 			resource->parent = parent_resource;
365 			kfree(resource);
370 	resource->name = resource_name;
371 	resource->size = resource_size;
372 	resource->size_new = resource_size;
373 	resource->id = resource_id;
374 	resource->size_valid = true;
375 	memcpy(&resource->size_params, size_params,
376 	       sizeof(resource->size_params));
377 	INIT_LIST_HEAD(&resource->resource_list);
378 	list_add_tail(&resource->list, resource_list);
385 					struct devlink_resource *resource)
389 	list_for_each_entry_safe(child_resource, tmp, &resource->resource_list,
436  * @resource_id: the requested resource id
443 	struct devlink_resource *resource;
447 	resource = devlink_resource_find(devlink, NULL, resource_id);
448 	if (!resource)
450 	*p_resource_size = resource->size_new;
451 	resource->size = resource->size_new;
460  * @resource_id: resource id
469 	struct devlink_resource *resource;
473 	resource = devlink_resource_find(devlink, NULL, resource_id);
474 	if (WARN_ON(!resource))
476 	WARN_ON(resource->occ_get);
478 	resource->occ_get = occ_get;
479 	resource->occ_get_priv = occ_get_priv;
487  * @resource_id: resource id
492 	struct devlink_resource *resource;
496 	resource = devlink_resource_find(devlink, NULL, resource_id);
497 	if (WARN_ON(!resource))
499 	WARN_ON(!resource->occ_get);
501 	resource->occ_get = NULL;
502 	resource->occ_get_priv = NULL;