-/**
- * Returns the top-page for a given page.
- *
- * \see cl_object_top(), cl_io_top()
- */
-struct cl_page *cl_page_top(struct cl_page *page)
-{
- return cl_page_top_trusted(page);
-}
-EXPORT_SYMBOL(cl_page_top);
-
-const struct cl_page_slice *cl_page_at(const struct cl_page *page,
- const struct lu_device_type *dtype)
-{
- return cl_page_at_trusted(page, dtype);
-}
-EXPORT_SYMBOL(cl_page_at);
-
-#define CL_PAGE_OP(opname) offsetof(struct cl_page_operations, opname)
-
-#define CL_PAGE_INVOKE(_env, _page, _op, _proto, ...) \
-({ \
- const struct lu_env *__env = (_env); \
- struct cl_page *__page = (_page); \
- const struct cl_page_slice *__scan; \
- int __result; \
- ptrdiff_t __op = (_op); \
- int (*__method)_proto; \
- \
- __result = 0; \
- __page = cl_page_top(__page); \
- do { \
- cfs_list_for_each_entry(__scan, &__page->cp_layers, \
- cpl_linkage) { \
- __method = *(void **)((char *)__scan->cpl_ops + \
- __op); \
- if (__method != NULL) { \
- __result = (*__method)(__env, __scan, \
- ## __VA_ARGS__); \
- if (__result != 0) \
- break; \
- } \
- } \
- __page = __page->cp_child; \
- } while (__page != NULL && __result == 0); \
- if (__result > 0) \
- __result = 0; \
- __result; \
-})
-
-#define CL_PAGE_INVOID(_env, _page, _op, _proto, ...) \
-do { \
- const struct lu_env *__env = (_env); \
- struct cl_page *__page = (_page); \
- const struct cl_page_slice *__scan; \
- ptrdiff_t __op = (_op); \
- void (*__method)_proto; \
- \
- __page = cl_page_top(__page); \
- do { \
- cfs_list_for_each_entry(__scan, &__page->cp_layers, \
- cpl_linkage) { \
- __method = *(void **)((char *)__scan->cpl_ops + \
- __op); \
- if (__method != NULL) \
- (*__method)(__env, __scan, \
- ## __VA_ARGS__); \
- } \
- __page = __page->cp_child; \
- } while (__page != NULL); \
-} while (0)
-
-#define CL_PAGE_INVOID_REVERSE(_env, _page, _op, _proto, ...) \
-do { \
- const struct lu_env *__env = (_env); \
- struct cl_page *__page = (_page); \
- const struct cl_page_slice *__scan; \
- ptrdiff_t __op = (_op); \
- void (*__method)_proto; \
- \
- /* get to the bottom page. */ \
- while (__page->cp_child != NULL) \
- __page = __page->cp_child; \
- do { \
- cfs_list_for_each_entry_reverse(__scan, &__page->cp_layers, \
- cpl_linkage) { \
- __method = *(void **)((char *)__scan->cpl_ops + \
- __op); \
- if (__method != NULL) \
- (*__method)(__env, __scan, \
- ## __VA_ARGS__); \
- } \
- __page = __page->cp_parent; \
- } while (__page != NULL); \
-} while (0)
-
-static int cl_page_invoke(const struct lu_env *env,
- struct cl_io *io, struct cl_page *page, ptrdiff_t op)
-
-{
- PINVRNT(env, page, cl_object_same(page->cp_obj, io->ci_obj));
- ENTRY;
- RETURN(CL_PAGE_INVOKE(env, page, op,
- (const struct lu_env *,
- const struct cl_page_slice *, struct cl_io *),
- io));
-}
-
-static void cl_page_invoid(const struct lu_env *env,
- struct cl_io *io, struct cl_page *page, ptrdiff_t op)
-
-{
- PINVRNT(env, page, cl_object_same(page->cp_obj, io->ci_obj));
- ENTRY;
- CL_PAGE_INVOID(env, page, op,
- (const struct lu_env *,
- const struct cl_page_slice *, struct cl_io *), io);
- EXIT;
-}
-