*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, 2013, Intel Corporation.
+ * Copyright (c) 2011, 2016, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*
*/
-static int lov_page_print(const struct lu_env *env,
- const struct cl_page_slice *slice,
- void *cookie, lu_printer_t printer)
+static int lov_comp_page_print(const struct lu_env *env,
+ const struct cl_page_slice *slice,
+ void *cookie, lu_printer_t printer)
{
- struct lov_page *lp = cl2lov_page(slice);
+ struct lov_page *lp = cl2lov_page(slice);
- return (*printer)(env, cookie, LUSTRE_LOV_NAME"-page@%p\n", lp);
+ return (*printer)(env, cookie,
+ LUSTRE_LOV_NAME"-page@%p, comp index: %x\n",
+ lp, lp->lps_index);
}
-static const struct cl_page_operations lov_page_ops = {
- .cpo_print = lov_page_print
+static const struct cl_page_operations lov_comp_page_ops = {
+ .cpo_print = lov_comp_page_print
};
-int lov_page_init_raid0(const struct lu_env *env, struct cl_object *obj,
- struct cl_page *page, pgoff_t index)
+int lov_page_init_composite(const struct lu_env *env, struct cl_object *obj,
+ struct cl_page *page, pgoff_t index)
{
struct lov_object *loo = cl2lov(obj);
- struct lov_layout_raid0 *r0 = lov_r0(loo);
struct lov_io *lio = lov_env_io(env);
struct cl_object *subobj;
struct cl_object *o;
struct lov_io_sub *sub;
struct lov_page *lpg = cl_object_page_slice(obj, page);
+ struct lov_layout_raid0 *r0;
loff_t offset;
- obd_off suboff;
+ loff_t suboff;
+ int entry;
int stripe;
int rc;
ENTRY;
offset = cl_offset(obj, index);
- stripe = lov_stripe_number(loo->lo_lsm, offset);
+ entry = lov_lsm_entry(loo->lo_lsm, offset);
+ if (entry < 0 || !lsm_entry_inited(loo->lo_lsm, entry)) {
+ /* non-existing layout component */
+ lov_page_init_empty(env, obj, page, index);
+ RETURN(0);
+ }
+
+ r0 = lov_r0(loo, entry);
+ stripe = lov_stripe_number(loo->lo_lsm, entry, offset);
LASSERT(stripe < r0->lo_nr);
- rc = lov_stripe_offset(loo->lo_lsm, offset, stripe,
- &suboff);
+ rc = lov_stripe_offset(loo->lo_lsm, entry, offset, stripe, &suboff);
LASSERT(rc == 0);
- cl_page_slice_add(page, &lpg->lps_cl, obj, &lov_page_ops);
+ lpg->lps_index = lov_comp_index(entry, stripe);
+ cl_page_slice_add(page, &lpg->lps_cl, obj, index, &lov_comp_page_ops);
- sub = lov_sub_get(env, lio, stripe);
+ sub = lov_sub_get(env, lio, lpg->lps_index);
if (IS_ERR(sub))
RETURN(PTR_ERR(sub));
subobj = lovsub2cl(r0->lo_sub[stripe]);
- cfs_list_for_each_entry(o, &subobj->co_lu.lo_header->loh_layers,
- co_lu.lo_linkage) {
+ list_for_each_entry(o, &subobj->co_lu.lo_header->loh_layers,
+ co_lu.lo_linkage) {
if (o->co_ops->coo_page_init != NULL) {
rc = o->co_ops->coo_page_init(sub->sub_env, o, page,
cl_index(subobj, suboff));
break;
}
}
- lov_sub_put(sub);
+
RETURN(rc);
}
-static int lov_page_empty_print(const struct lu_env *env,
+static int lov_empty_page_print(const struct lu_env *env,
const struct cl_page_slice *slice,
void *cookie, lu_printer_t printer)
{
}
static const struct cl_page_operations lov_empty_page_ops = {
- .cpo_print = lov_page_empty_print
+ .cpo_print = lov_empty_page_print
};
int lov_page_init_empty(const struct lu_env *env, struct cl_object *obj,
void *addr;
ENTRY;
- cl_page_slice_add(page, &lpg->lps_cl, obj, &lov_empty_page_ops);
+ cl_page_slice_add(page, &lpg->lps_cl, obj, index, &lov_empty_page_ops);
addr = kmap(page->cp_vmpage);
memset(addr, 0, cl_page_size(obj));
kunmap(page->cp_vmpage);