RDMA/core: Move ib_uverbs_file struct to uverbs_types.h

In light of the previous commit, make the ib_uverbs_file accessible to
drivers by moving its definition to uverbs_types.h, to allow drivers to
freely access the struct argument and create a personalized cleanup flow.

For the same reason expose uverbs_try_lock_object function to allow driver
to safely access the uverbs objects.

Signed-off-by: Patrisious Haddad <[email protected]>
Link: https://patch.msgid.link/29b718e0dca35daa5f496320a39284fc1f5a1722.1730373303.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <[email protected]>

Author: PatrisiousHaddad

drivers/infiniband/core/rdma_core.c

@@ -58,8 +58,8 @@ void uverbs_uobject_put(struct ib_uobject *uobject)
 }
 EXPORT_SYMBOL(uverbs_uobject_put);
 
-static int uverbs_try_lock_object(struct ib_uobject *uobj,
-				  enum rdma_lookup_mode mode)
+int uverbs_try_lock_object(struct ib_uobject *uobj,
+			   enum rdma_lookup_mode mode)
 {
 	/*
 	 * When a shared access is required, we use a positive counter. Each
@@ -84,6 +84,7 @@ static int uverbs_try_lock_object(struct ib_uobject *uobj,
 	}
 	return 0;
 }
+EXPORT_SYMBOL(uverbs_try_lock_object);
 
 static void assert_uverbs_usecnt(struct ib_uobject *uobj,
 				 enum rdma_lookup_mode mode)

drivers/infiniband/core/uverbs.h

@@ -133,37 +133,6 @@ struct ib_uverbs_completion_event_file {
 	struct ib_uverbs_event_queue		ev_queue;
 };
 
-struct ib_uverbs_file {
-	struct kref				ref;
-	struct ib_uverbs_device		       *device;
-	struct mutex				ucontext_lock;
-	/*
-	 * ucontext must be accessed via ib_uverbs_get_ucontext() or with
-	 * ucontext_lock held
-	 */
-	struct ib_ucontext		       *ucontext;
-	struct ib_uverbs_async_event_file      *default_async_file;
-	struct list_head			list;
-
-	/*
-	 * To access the uobjects list hw_destroy_rwsem must be held for write
-	 * OR hw_destroy_rwsem held for read AND uobjects_lock held.
-	 * hw_destroy_rwsem should be called across any destruction of the HW
-	 * object of an associated uobject.
-	 */
-	struct rw_semaphore	hw_destroy_rwsem;
-	spinlock_t		uobjects_lock;
-	struct list_head	uobjects;
-
-	struct mutex umap_lock;
-	struct list_head umaps;
-	struct page *disassociate_page;
-
-	struct xarray		idr;
-
-	struct mutex disassociation_lock;
-};
-
 struct ib_uverbs_event {
 	union {
 		struct ib_uverbs_async_event_desc	async;

include/rdma/uverbs_types.h

@@ -134,6 +134,8 @@ static inline void uverbs_uobject_get(struct ib_uobject *uobject)
 }
 void uverbs_uobject_put(struct ib_uobject *uobject);
 
+int uverbs_try_lock_object(struct ib_uobject *uobj, enum rdma_lookup_mode mode);
+
 struct uverbs_obj_fd_type {
 	/*
 	 * In fd based objects, uverbs_obj_type_ops points to generic
@@ -150,6 +152,37 @@ struct uverbs_obj_fd_type {
 	int				flags;
 };
 
+struct ib_uverbs_file {
+	struct kref				ref;
+	struct ib_uverbs_device		       *device;
+	struct mutex				ucontext_lock;
+	/*
+	 * ucontext must be accessed via ib_uverbs_get_ucontext() or with
+	 * ucontext_lock held
+	 */
+	struct ib_ucontext		       *ucontext;
+	struct ib_uverbs_async_event_file      *default_async_file;
+	struct list_head			list;
+
+	/*
+	 * To access the uobjects list hw_destroy_rwsem must be held for write
+	 * OR hw_destroy_rwsem held for read AND uobjects_lock held.
+	 * hw_destroy_rwsem should be called across any destruction of the HW
+	 * object of an associated uobject.
+	 */
+	struct rw_semaphore	hw_destroy_rwsem;
+	spinlock_t		uobjects_lock;
+	struct list_head	uobjects;
+
+	struct mutex umap_lock;
+	struct list_head umaps;
+	struct page *disassociate_page;
+
+	struct xarray		idr;
+
+	struct mutex disassociation_lock;
+};
+
 extern const struct uverbs_obj_type_class uverbs_idr_class;
 extern const struct uverbs_obj_type_class uverbs_fd_class;
 int uverbs_uobject_fd_release(struct inode *inode, struct file *filp);