-static const struct cl_page_operations lov_page_ops = {
- .cpo_fini = lov_page_fini,
- .cpo_own = lov_page_own,
- .cpo_assume = lov_page_assume,
- .cpo_print = lov_page_print
-};
-
-static void lov_empty_page_fini(const struct lu_env *env,
- struct cl_page_slice *slice)
-{
- struct lov_page *lp = cl2lov_page(slice);
-
- LASSERT(slice->cpl_page->cp_child == NULL);
- ENTRY;
- OBD_SLAB_FREE_PTR(lp, lov_page_kmem);
- EXIT;
-}
-
-struct cl_page *lov_page_init_raid0(const struct lu_env *env,
- struct cl_object *obj, struct cl_page *page,
- cfs_page_t *vmpage)
-{
- struct lov_page *lpg;
- struct lov_object *loo = cl2lov(obj);
- int result;
-
- ENTRY;
- OBD_SLAB_ALLOC_PTR_GFP(lpg, lov_page_kmem, CFS_ALLOC_IO);
- if (lpg != NULL) {
- loff_t offset;
- int stripe;
- obd_off suboff;
- struct cl_page *subpage;
- struct cl_object *subobj;
- struct lov_layout_raid0 *r0 = lov_r0(loo);
-
- offset = cl_offset(obj, page->cp_index);
- stripe = lov_stripe_number(r0->lo_lsm, offset);
- result = lov_stripe_offset(r0->lo_lsm, offset, stripe,
- &suboff);
- LASSERT(stripe < r0->lo_nr);
- LASSERT(result == 0);
-
- subobj = lovsub2cl(r0->lo_sub[stripe]);
- subpage = cl_page_find(env, subobj,
- cl_index(subobj, suboff), vmpage,
- page->cp_type);
- if (!IS_ERR(subpage)) {
- if (subpage->cp_parent != NULL) {
- /*
- * This is only possible when TRANSIENT page
- * is being created, and CACHEABLE sub-page
- * (attached to already existing top-page) has
- * been found. Tell cl_page_find() to use
- * existing page.
- */
- LASSERT(subpage->cp_type == CPT_CACHEABLE);
- LASSERT(page->cp_type == CPT_TRANSIENT);
- lpg->lps_invalid = 1;
- cl_page_put(env, subpage);
- /*
- * XXX This assumes that lov is in the topmost
- * cl_page.
- */
- result = PTR_ERR(cl_page_top(subpage));
- } else {
- lu_ref_add(&subpage->cp_reference, "lov", page);
- subpage->cp_parent = page;
- page->cp_child = subpage;
- }
- cl_page_slice_add(page, &lpg->lps_cl,
- obj, &lov_page_ops);
- } else
- result = PTR_ERR(subpage);
- } else
- result = -ENOMEM;
- RETURN(ERR_PTR(result));
-}
-
-