devlink: Add callback to query for snapshot id before snapshot create (ccadfa44) · Commits · 戴 / test

include/net/devlink.h

+8 −0

Original line number	Diff line number	Diff line
		@@ -29,6 +29,7 @@ struct devlink {
		struct list_head resource_list;
		struct list_head param_list;
		struct list_head region_list;
		u32 snapshot_id;
		struct devlink_dpipe_headers *dpipe_headers;
		const struct devlink_ops *ops;
		struct device *dev;
		@@ -551,6 +552,7 @@ struct devlink_region devlink_region_create(struct devlink devlink,
		u32 region_max_snapshots,
		u64 region_size);
		void devlink_region_destroy(struct devlink_region *region);
		u32 devlink_region_shapshot_id_get(struct devlink *devlink);

		#else

		@@ -792,6 +794,12 @@ devlink_region_destroy(struct devlink_region *region)
		{
		}

		static inline u32
		devlink_region_shapshot_id_get(struct devlink *devlink)
		{
		return 0;
		}

		#endif

		#endif /* _NET_DEVLINK_H_ */

+21 −0

Original line number	Diff line number	Diff line
		@@ -4193,6 +4193,27 @@ void devlink_region_destroy(struct devlink_region *region)
		}
		EXPORT_SYMBOL_GPL(devlink_region_destroy);

		/**
		* devlink_region_shapshot_id_get - get snapshot ID
		*
		* This callback should be called when adding a new snapshot,
		* Driver should use the same id for multiple snapshots taken
		* on multiple regions at the same time/by the same trigger.
		*
		* @devlink: devlink
		*/
		u32 devlink_region_shapshot_id_get(struct devlink *devlink)
		{
		u32 id;

		mutex_lock(&devlink->lock);
		id = ++devlink->snapshot_id;
		mutex_unlock(&devlink->lock);

		return id;
		}
		EXPORT_SYMBOL_GPL(devlink_region_shapshot_id_get);

		static int __init devlink_module_init(void)
		{
		return genl_register_family(&devlink_nl_family);