4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * Implementation of cl_io for OSC layer.
38 * Author: Nikita Danilov <nikita.danilov@sun.com>
39 * Author: Jinshan Xiong <jinshan.xiong@whamcloud.com>
42 #define DEBUG_SUBSYSTEM S_OSC
44 #include "osc_cl_internal.h"
50 /*****************************************************************************
56 static struct osc_req *cl2osc_req(const struct cl_req_slice *slice)
58 LINVRNT(slice->crs_dev->cd_lu_dev.ld_type == &osc_device_type);
59 return container_of0(slice, struct osc_req, or_cl);
62 static struct osc_io *cl2osc_io(const struct lu_env *env,
63 const struct cl_io_slice *slice)
65 struct osc_io *oio = container_of0(slice, struct osc_io, oi_cl);
67 LINVRNT(oio == osc_env_io(env));
71 static struct osc_page *osc_cl_page_osc(struct cl_page *page)
73 const struct cl_page_slice *slice;
75 slice = cl_page_at(page, &osc_device_type);
76 LASSERT(slice != NULL);
78 return cl2osc_page(slice);
81 /*****************************************************************************
87 static void osc_io_fini(const struct lu_env *env, const struct cl_io_slice *io)
92 * An implementation of cl_io_operations::cio_io_submit() method for osc
93 * layer. Iterates over pages in the in-queue, prepares each for io by calling
94 * cl_page_prep() and then either submits them through osc_io_submit_page()
95 * or, if page is already submitted, changes osc flags through
96 * osc_set_async_flags().
98 static int osc_io_submit(const struct lu_env *env,
99 const struct cl_io_slice *ios,
100 enum cl_req_type crt, struct cl_2queue *queue)
102 struct cl_page *page;
104 struct client_obd *cli = NULL;
105 struct osc_object *osc = NULL; /* to keep gcc happy */
106 struct osc_page *opg;
110 struct cl_page_list *qin = &queue->c2_qin;
111 struct cl_page_list *qout = &queue->c2_qout;
118 LASSERT(qin->pl_nr > 0);
120 CDEBUG(D_CACHE, "%d %d\n", qin->pl_nr, crt);
122 osc = cl2osc(ios->cis_obj);
124 max_pages = cli->cl_max_pages_per_rpc;
126 cmd = crt == CRT_WRITE ? OBD_BRW_WRITE : OBD_BRW_READ;
127 brw_flags = osc_io_srvlock(cl2osc_io(env, ios)) ? OBD_BRW_SRVLOCK : 0;
130 * NOTE: here @page is a top-level page. This is done to avoid
131 * creation of sub-page-list.
133 cl_page_list_for_each_safe(page, tmp, qin) {
134 struct osc_async_page *oap;
140 opg = osc_cl_page_osc(page);
142 LASSERT(osc == oap->oap_obj);
144 if (!list_empty(&oap->oap_pending_item) ||
145 !list_empty(&oap->oap_rpc_item)) {
146 CDEBUG(D_CACHE, "Busy oap %p page %p for submit.\n",
152 result = cl_page_prep(env, io, page, crt);
155 if (result != -EALREADY)
158 * Handle -EALREADY error: for read case, the page is
159 * already in UPTODATE state; for write, the page
166 cl_page_list_move(qout, qin, page);
167 oap->oap_async_flags = ASYNC_URGENT|ASYNC_READY;
168 oap->oap_async_flags |= ASYNC_COUNT_STABLE;
170 osc_page_submit(env, opg, crt, brw_flags);
171 list_add_tail(&oap->oap_pending_item, &list);
172 if (++queued == max_pages) {
174 result = osc_queue_sync_pages(env, osc, &list, cmd,
182 result = osc_queue_sync_pages(env, osc, &list, cmd, brw_flags);
184 CDEBUG(D_INFO, "%d/%d %d\n", qin->pl_nr, qout->pl_nr, result);
185 return qout->pl_nr > 0 ? 0 : result;
188 static void osc_page_touch_at(const struct lu_env *env,
189 struct cl_object *obj, pgoff_t idx, unsigned to)
191 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
192 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
196 /* offset within stripe */
197 kms = cl_offset(obj, idx) + to;
199 cl_object_attr_lock(obj);
203 * ll_inode_size_lock(inode, 0); lov_stripe_lock(lsm);
207 CDEBUG(D_INODE, "stripe KMS %sincreasing %llu->%llu %llu\n",
208 kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms,
209 loi->loi_lvb.lvb_size);
212 if (kms > loi->loi_kms) {
216 if (kms > loi->loi_lvb.lvb_size) {
217 attr->cat_size = kms;
220 cl_object_attr_set(env, obj, attr, valid);
221 cl_object_attr_unlock(obj);
225 * This is called when a page is accessed within file in a way that creates
226 * new page, if one were missing (i.e., if there were a hole at that place in
227 * the file, or accessed page is beyond the current file size). Examples:
228 * ->commit_write() and ->nopage() methods.
230 * Expand stripe KMS if necessary.
232 static void osc_page_touch(const struct lu_env *env,
233 struct osc_page *opage, unsigned to)
235 struct cl_page *page = opage->ops_cl.cpl_page;
236 struct cl_object *obj = opage->ops_cl.cpl_obj;
238 osc_page_touch_at(env, obj, page->cp_index, to);
242 * Implements cl_io_operations::cio_prepare_write() method for osc layer.
244 * \retval -EIO transfer initiated against this osc will most likely fail
245 * \retval 0 transfer initiated against this osc will most likely succeed.
247 * The reason for this check is to immediately return an error to the caller
248 * in the case of a deactivated import. Note, that import can be deactivated
249 * later, while pages, dirtied by this IO, are still in the cache, but this is
250 * irrelevant, because that would still return an error to the application (if
251 * it does fsync), but many applications don't do fsync because of performance
252 * issues, and we wanted to return an -EIO at write time to notify the
255 static int osc_io_prepare_write(const struct lu_env *env,
256 const struct cl_io_slice *ios,
257 const struct cl_page_slice *slice,
258 unsigned from, unsigned to)
260 struct osc_device *dev = lu2osc_dev(slice->cpl_obj->co_lu.lo_dev);
261 struct obd_import *imp = class_exp2cliimp(dev->od_exp);
262 struct osc_io *oio = cl2osc_io(env, ios);
266 * This implements OBD_BRW_CHECK logic from old client.
269 if (imp == NULL || imp->imp_invalid)
271 if (result == 0 && oio->oi_lockless)
272 /* this page contains `invalid' data, but who cares?
273 * nobody can access the invalid data.
274 * in osc_io_commit_write(), we're going to write exact
275 * [from, to) bytes of this page to OST. -jay */
276 cl_page_export(env, slice->cpl_page, 1);
281 static int osc_io_commit_write(const struct lu_env *env,
282 const struct cl_io_slice *ios,
283 const struct cl_page_slice *slice,
284 unsigned from, unsigned to)
286 struct osc_io *oio = cl2osc_io(env, ios);
287 struct osc_page *opg = cl2osc_page(slice);
288 struct osc_object *obj = cl2osc(opg->ops_cl.cpl_obj);
289 struct osc_async_page *oap = &opg->ops_oap;
293 * XXX instead of calling osc_page_touch() here and in
294 * osc_io_fault_start() it might be more logical to introduce
295 * cl_page_touch() method, that generic cl_io_commit_write() and page
298 osc_page_touch(env, cl2osc_page(slice), to);
299 if (!client_is_remote(osc_export(obj)) &&
300 capable(CFS_CAP_SYS_RESOURCE))
301 oap->oap_brw_flags |= OBD_BRW_NOQUOTA;
303 if (oio->oi_lockless)
304 /* see osc_io_prepare_write() for lockless io handling. */
305 cl_page_clip(env, slice->cpl_page, from, to);
310 static int osc_io_fault_start(const struct lu_env *env,
311 const struct cl_io_slice *ios)
314 struct cl_fault_io *fio;
317 fio = &io->u.ci_fault;
318 CDEBUG(D_INFO, "%lu %d %d\n",
319 fio->ft_index, fio->ft_writable, fio->ft_nob);
321 * If mapping is writeable, adjust kms to cover this page,
322 * but do not extend kms beyond actual file size.
325 if (fio->ft_writable)
326 osc_page_touch_at(env, ios->cis_obj,
327 fio->ft_index, fio->ft_nob);
331 static int osc_async_upcall(void *a, int rc)
333 struct osc_async_cbargs *args = a;
336 complete(&args->opc_sync);
341 * Checks that there are no pages being written in the extent being truncated.
343 static int trunc_check_cb(const struct lu_env *env, struct cl_io *io,
344 struct cl_page *page, void *cbdata)
346 const struct cl_page_slice *slice;
347 struct osc_page *ops;
348 struct osc_async_page *oap;
349 __u64 start = *(__u64 *)cbdata;
351 slice = cl_page_at(page, &osc_device_type);
352 LASSERT(slice != NULL);
353 ops = cl2osc_page(slice);
356 if (oap->oap_cmd & OBD_BRW_WRITE &&
357 !list_empty(&oap->oap_pending_item))
358 CL_PAGE_DEBUG(D_ERROR, env, page, "exists %llu/%s.\n",
359 start, current->comm);
362 struct page *vmpage = cl_page_vmpage(env, page);
364 if (PageLocked(vmpage))
365 CDEBUG(D_CACHE, "page %p index %lu locked for %d.\n",
367 (oap->oap_cmd & OBD_BRW_RWMASK));
370 return CLP_GANG_OKAY;
373 static void osc_trunc_check(const struct lu_env *env, struct cl_io *io,
374 struct osc_io *oio, __u64 size)
376 struct cl_object *clob;
380 clob = oio->oi_cl.cis_obj;
381 start = cl_index(clob, size);
382 partial = cl_offset(clob, start) < size;
385 * Complain if there are pages in the truncated region.
387 cl_page_gang_lookup(env, clob, io, start + partial, CL_PAGE_EOF,
388 trunc_check_cb, (void *)&size);
391 static int osc_io_setattr_start(const struct lu_env *env,
392 const struct cl_io_slice *slice)
394 struct cl_io *io = slice->cis_io;
395 struct osc_io *oio = cl2osc_io(env, slice);
396 struct cl_object *obj = slice->cis_obj;
397 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
398 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
399 struct obdo *oa = &oio->oi_oa;
400 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
401 __u64 size = io->u.ci_setattr.sa_attr.lvb_size;
402 unsigned int ia_valid = io->u.ci_setattr.sa_valid;
404 struct obd_info oinfo = { };
406 /* truncate cache dirty pages first */
407 if (cl_io_is_trunc(io))
408 result = osc_cache_truncate_start(env, oio, cl2osc(obj), size);
410 if (result == 0 && oio->oi_lockless == 0) {
411 cl_object_attr_lock(obj);
412 result = cl_object_attr_get(env, obj, attr);
414 struct ost_lvb *lvb = &io->u.ci_setattr.sa_attr;
415 unsigned int cl_valid = 0;
417 if (ia_valid & ATTR_SIZE) {
418 attr->cat_size = attr->cat_kms = size;
419 cl_valid = CAT_SIZE | CAT_KMS;
421 if (ia_valid & ATTR_MTIME_SET) {
422 attr->cat_mtime = lvb->lvb_mtime;
423 cl_valid |= CAT_MTIME;
425 if (ia_valid & ATTR_ATIME_SET) {
426 attr->cat_atime = lvb->lvb_atime;
427 cl_valid |= CAT_ATIME;
429 if (ia_valid & ATTR_CTIME_SET) {
430 attr->cat_ctime = lvb->lvb_ctime;
431 cl_valid |= CAT_CTIME;
433 result = cl_object_attr_set(env, obj, attr, cl_valid);
435 cl_object_attr_unlock(obj);
437 memset(oa, 0, sizeof(*oa));
439 oa->o_oi = loi->loi_oi;
440 oa->o_mtime = attr->cat_mtime;
441 oa->o_atime = attr->cat_atime;
442 oa->o_ctime = attr->cat_ctime;
443 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP | OBD_MD_FLATIME |
444 OBD_MD_FLCTIME | OBD_MD_FLMTIME;
445 if (ia_valid & ATTR_SIZE) {
447 oa->o_blocks = OBD_OBJECT_EOF;
448 oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
450 if (oio->oi_lockless) {
451 oa->o_flags = OBD_FL_SRVLOCK;
452 oa->o_valid |= OBD_MD_FLFLAGS;
455 LASSERT(oio->oi_lockless == 0);
459 init_completion(&cbargs->opc_sync);
461 if (ia_valid & ATTR_SIZE)
462 result = osc_punch_base(osc_export(cl2osc(obj)),
463 &oinfo, osc_async_upcall,
464 cbargs, PTLRPCD_SET);
466 result = osc_setattr_async_base(osc_export(cl2osc(obj)),
469 cbargs, PTLRPCD_SET);
470 cbargs->opc_rpc_sent = result == 0;
475 static void osc_io_setattr_end(const struct lu_env *env,
476 const struct cl_io_slice *slice)
478 struct cl_io *io = slice->cis_io;
479 struct osc_io *oio = cl2osc_io(env, slice);
480 struct cl_object *obj = slice->cis_obj;
481 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
484 if (cbargs->opc_rpc_sent) {
485 wait_for_completion(&cbargs->opc_sync);
486 result = io->ci_result = cbargs->opc_rc;
489 if (oio->oi_lockless) {
490 /* lockless truncate */
491 struct osc_device *osd = lu2osc_dev(obj->co_lu.lo_dev);
493 LASSERT(cl_io_is_trunc(io));
494 /* XXX: Need a lock. */
495 osd->od_stats.os_lockless_truncates++;
499 if (cl_io_is_trunc(io)) {
500 __u64 size = io->u.ci_setattr.sa_attr.lvb_size;
502 osc_trunc_check(env, io, oio, size);
503 if (oio->oi_trunc != NULL) {
504 osc_cache_truncate_end(env, oio, cl2osc(obj));
505 oio->oi_trunc = NULL;
510 static int osc_io_read_start(const struct lu_env *env,
511 const struct cl_io_slice *slice)
513 struct cl_object *obj = slice->cis_obj;
514 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
517 if (!slice->cis_io->ci_noatime) {
518 cl_object_attr_lock(obj);
519 attr->cat_atime = ktime_get_real_seconds();
520 rc = cl_object_attr_set(env, obj, attr, CAT_ATIME);
521 cl_object_attr_unlock(obj);
526 static int osc_io_write_start(const struct lu_env *env,
527 const struct cl_io_slice *slice)
529 struct cl_object *obj = slice->cis_obj;
530 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
533 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_SETTIME, 1);
534 cl_object_attr_lock(obj);
535 attr->cat_mtime = attr->cat_ctime = ktime_get_real_seconds();
536 rc = cl_object_attr_set(env, obj, attr, CAT_MTIME | CAT_CTIME);
537 cl_object_attr_unlock(obj);
542 static int osc_fsync_ost(const struct lu_env *env, struct osc_object *obj,
543 struct cl_fsync_io *fio)
545 struct osc_io *oio = osc_env_io(env);
546 struct obdo *oa = &oio->oi_oa;
547 struct obd_info *oinfo = &oio->oi_info;
548 struct lov_oinfo *loi = obj->oo_oinfo;
549 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
552 memset(oa, 0, sizeof(*oa));
553 oa->o_oi = loi->loi_oi;
554 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
556 /* reload size abd blocks for start and end of sync range */
557 oa->o_size = fio->fi_start;
558 oa->o_blocks = fio->fi_end;
559 oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
561 obdo_set_parent_fid(oa, fio->fi_fid);
563 memset(oinfo, 0, sizeof(*oinfo));
565 init_completion(&cbargs->opc_sync);
567 rc = osc_sync_base(osc_export(obj), oinfo, osc_async_upcall, cbargs,
572 static int osc_io_fsync_start(const struct lu_env *env,
573 const struct cl_io_slice *slice)
575 struct cl_io *io = slice->cis_io;
576 struct cl_fsync_io *fio = &io->u.ci_fsync;
577 struct cl_object *obj = slice->cis_obj;
578 struct osc_object *osc = cl2osc(obj);
579 pgoff_t start = cl_index(obj, fio->fi_start);
580 pgoff_t end = cl_index(obj, fio->fi_end);
583 if (fio->fi_end == OBD_OBJECT_EOF)
586 result = osc_cache_writeback_range(env, osc, start, end, 0,
587 fio->fi_mode == CL_FSYNC_DISCARD);
589 fio->fi_nr_written += result;
592 if (fio->fi_mode == CL_FSYNC_ALL) {
595 /* we have to wait for writeback to finish before we can
596 * send OST_SYNC RPC. This is bad because it causes extents
597 * to be written osc by osc. However, we usually start
598 * writeback before CL_FSYNC_ALL so this won't have any real
600 rc = osc_cache_wait_range(env, osc, start, end);
603 rc = osc_fsync_ost(env, osc, fio);
611 static void osc_io_fsync_end(const struct lu_env *env,
612 const struct cl_io_slice *slice)
614 struct cl_fsync_io *fio = &slice->cis_io->u.ci_fsync;
615 struct cl_object *obj = slice->cis_obj;
616 pgoff_t start = cl_index(obj, fio->fi_start);
617 pgoff_t end = cl_index(obj, fio->fi_end);
620 if (fio->fi_mode == CL_FSYNC_LOCAL) {
621 result = osc_cache_wait_range(env, cl2osc(obj), start, end);
622 } else if (fio->fi_mode == CL_FSYNC_ALL) {
623 struct osc_io *oio = cl2osc_io(env, slice);
624 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
626 wait_for_completion(&cbargs->opc_sync);
628 result = cbargs->opc_rc;
630 slice->cis_io->ci_result = result;
633 static void osc_io_end(const struct lu_env *env,
634 const struct cl_io_slice *slice)
636 struct osc_io *oio = cl2osc_io(env, slice);
638 if (oio->oi_active) {
639 osc_extent_release(env, oio->oi_active);
640 oio->oi_active = NULL;
644 static const struct cl_io_operations osc_io_ops = {
647 .cio_start = osc_io_read_start,
648 .cio_fini = osc_io_fini
651 .cio_start = osc_io_write_start,
652 .cio_end = osc_io_end,
653 .cio_fini = osc_io_fini
656 .cio_start = osc_io_setattr_start,
657 .cio_end = osc_io_setattr_end
660 .cio_start = osc_io_fault_start,
661 .cio_end = osc_io_end,
662 .cio_fini = osc_io_fini
665 .cio_start = osc_io_fsync_start,
666 .cio_end = osc_io_fsync_end,
667 .cio_fini = osc_io_fini
670 .cio_fini = osc_io_fini
675 .cio_submit = osc_io_submit
678 .cio_submit = osc_io_submit
681 .cio_prepare_write = osc_io_prepare_write,
682 .cio_commit_write = osc_io_commit_write
685 /*****************************************************************************
687 * Transfer operations.
691 static int osc_req_prep(const struct lu_env *env,
692 const struct cl_req_slice *slice)
697 static void osc_req_completion(const struct lu_env *env,
698 const struct cl_req_slice *slice, int ioret)
702 or = cl2osc_req(slice);
703 kmem_cache_free(osc_req_kmem, or);
707 * Implementation of struct cl_req_operations::cro_attr_set() for osc
708 * layer. osc is responsible for struct obdo::o_id and struct obdo::o_seq
711 static void osc_req_attr_set(const struct lu_env *env,
712 const struct cl_req_slice *slice,
713 const struct cl_object *obj,
714 struct cl_req_attr *attr, u64 flags)
716 struct lov_oinfo *oinfo;
717 struct cl_req *clerq;
718 struct cl_page *apage; /* _some_ page in @clerq */
719 struct cl_lock *lock; /* _some_ lock protecting @apage */
720 struct osc_lock *olck;
721 struct osc_page *opg;
725 oinfo = cl2osc(obj)->oo_oinfo;
726 lvb = &oinfo->loi_lvb;
729 if ((flags & OBD_MD_FLMTIME) != 0) {
730 oa->o_mtime = lvb->lvb_mtime;
731 oa->o_valid |= OBD_MD_FLMTIME;
733 if ((flags & OBD_MD_FLATIME) != 0) {
734 oa->o_atime = lvb->lvb_atime;
735 oa->o_valid |= OBD_MD_FLATIME;
737 if ((flags & OBD_MD_FLCTIME) != 0) {
738 oa->o_ctime = lvb->lvb_ctime;
739 oa->o_valid |= OBD_MD_FLCTIME;
741 if (flags & OBD_MD_FLGROUP) {
742 ostid_set_seq(&oa->o_oi, ostid_seq(&oinfo->loi_oi));
743 oa->o_valid |= OBD_MD_FLGROUP;
745 if (flags & OBD_MD_FLID) {
746 ostid_set_id(&oa->o_oi, ostid_id(&oinfo->loi_oi));
747 oa->o_valid |= OBD_MD_FLID;
749 if (flags & OBD_MD_FLHANDLE) {
750 clerq = slice->crs_req;
751 LASSERT(!list_empty(&clerq->crq_pages));
752 apage = container_of(clerq->crq_pages.next,
753 struct cl_page, cp_flight);
754 opg = osc_cl_page_osc(apage);
755 apage = opg->ops_cl.cpl_page; /* now apage is a sub-page */
756 lock = cl_lock_at_page(env, apage->cp_obj, apage, NULL, 1, 1);
758 struct cl_object_header *head;
759 struct cl_lock *scan;
761 head = cl_object_header(apage->cp_obj);
762 list_for_each_entry(scan, &head->coh_locks,
764 CL_LOCK_DEBUG(D_ERROR, env, scan,
766 CL_PAGE_DEBUG(D_ERROR, env, apage,
767 "dump uncover page!\n");
772 olck = osc_lock_at(lock);
773 LASSERT(olck != NULL);
774 LASSERT(ergo(opg->ops_srvlock, olck->ols_lock == NULL));
775 /* check for lockless io. */
776 if (olck->ols_lock != NULL) {
777 oa->o_handle = olck->ols_lock->l_remote_handle;
778 oa->o_valid |= OBD_MD_FLHANDLE;
780 cl_lock_put(env, lock);
784 static const struct cl_req_operations osc_req_ops = {
785 .cro_prep = osc_req_prep,
786 .cro_attr_set = osc_req_attr_set,
787 .cro_completion = osc_req_completion
790 int osc_io_init(const struct lu_env *env,
791 struct cl_object *obj, struct cl_io *io)
793 struct osc_io *oio = osc_env_io(env);
795 CL_IO_SLICE_CLEAN(oio, oi_cl);
796 cl_io_slice_add(io, &oio->oi_cl, obj, &osc_io_ops);
800 int osc_req_init(const struct lu_env *env, struct cl_device *dev,
806 or = kmem_cache_alloc(osc_req_kmem, GFP_NOFS | __GFP_ZERO);
808 cl_req_slice_add(req, &or->or_cl, dev, &osc_req_ops);