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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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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, 2013, 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);
66 LINVRNT(oio == osc_env_io(env));
70 static struct osc_page *osc_cl_page_osc(struct cl_page *page)
72 const struct cl_page_slice *slice;
74 slice = cl_page_at(page, &osc_device_type);
75 LASSERT(slice != NULL);
77 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;
108 CFS_LIST_HEAD (list);
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 (!cfs_list_empty(&oap->oap_pending_item) ||
145 !cfs_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 spin_lock(&oap->oap_lock);
168 oap->oap_async_flags = ASYNC_URGENT|ASYNC_READY;
169 oap->oap_async_flags |= ASYNC_COUNT_STABLE;
170 spin_unlock(&oap->oap_lock);
172 osc_page_submit(env, opg, crt, brw_flags);
173 cfs_list_add_tail(&oap->oap_pending_item, &list);
174 if (++queued == max_pages) {
176 result = osc_queue_sync_pages(env, osc, &list, cmd,
184 result = osc_queue_sync_pages(env, osc, &list, cmd, brw_flags);
186 CDEBUG(D_INFO, "%d/%d %d\n", qin->pl_nr, qout->pl_nr, result);
187 return qout->pl_nr > 0 ? 0 : result;
190 static void osc_page_touch_at(const struct lu_env *env,
191 struct cl_object *obj, pgoff_t idx, unsigned to)
193 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
194 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
198 /* offset within stripe */
199 kms = cl_offset(obj, idx) + to;
201 cl_object_attr_lock(obj);
205 * ll_inode_size_lock(inode, 0); lov_stripe_lock(lsm);
209 CDEBUG(D_INODE, "stripe KMS %sincreasing "LPU64"->"LPU64" "LPU64"\n",
210 kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms,
211 loi->loi_lvb.lvb_size);
214 if (kms > loi->loi_kms) {
218 if (kms > loi->loi_lvb.lvb_size) {
219 attr->cat_size = kms;
222 cl_object_attr_set(env, obj, attr, valid);
223 cl_object_attr_unlock(obj);
227 * This is called when a page is accessed within file in a way that creates
228 * new page, if one were missing (i.e., if there were a hole at that place in
229 * the file, or accessed page is beyond the current file size). Examples:
230 * ->commit_write() and ->nopage() methods.
232 * Expand stripe KMS if necessary.
234 static void osc_page_touch(const struct lu_env *env,
235 struct osc_page *opage, unsigned to)
237 struct cl_page *page = opage->ops_cl.cpl_page;
238 struct cl_object *obj = opage->ops_cl.cpl_obj;
240 osc_page_touch_at(env, obj, page->cp_index, to);
244 * Implements cl_io_operations::cio_prepare_write() method for osc layer.
246 * \retval -EIO transfer initiated against this osc will most likely fail
247 * \retval 0 transfer initiated against this osc will most likely succeed.
249 * The reason for this check is to immediately return an error to the caller
250 * in the case of a deactivated import. Note, that import can be deactivated
251 * later, while pages, dirtied by this IO, are still in the cache, but this is
252 * irrelevant, because that would still return an error to the application (if
253 * it does fsync), but many applications don't do fsync because of performance
254 * issues, and we wanted to return an -EIO at write time to notify the
257 static int osc_io_prepare_write(const struct lu_env *env,
258 const struct cl_io_slice *ios,
259 const struct cl_page_slice *slice,
260 unsigned from, unsigned to)
262 struct osc_device *dev = lu2osc_dev(slice->cpl_obj->co_lu.lo_dev);
263 struct obd_import *imp = class_exp2cliimp(dev->od_exp);
264 struct osc_io *oio = cl2osc_io(env, ios);
269 * This implements OBD_BRW_CHECK logic from old client.
272 if (imp == NULL || imp->imp_invalid)
274 if (result == 0 && oio->oi_lockless)
275 /* this page contains `invalid' data, but who cares?
276 * nobody can access the invalid data.
277 * in osc_io_commit_write(), we're going to write exact
278 * [from, to) bytes of this page to OST. -jay */
279 cl_page_export(env, slice->cpl_page, 1);
284 static int osc_io_commit_write(const struct lu_env *env,
285 const struct cl_io_slice *ios,
286 const struct cl_page_slice *slice,
287 unsigned from, unsigned to)
289 struct osc_io *oio = cl2osc_io(env, ios);
290 struct osc_page *opg = cl2osc_page(slice);
291 struct osc_object *obj = cl2osc(opg->ops_cl.cpl_obj);
292 struct osc_async_page *oap = &opg->ops_oap;
297 * XXX instead of calling osc_page_touch() here and in
298 * osc_io_fault_start() it might be more logical to introduce
299 * cl_page_touch() method, that generic cl_io_commit_write() and page
302 osc_page_touch(env, cl2osc_page(slice), to);
303 if (!client_is_remote(osc_export(obj)) &&
304 cfs_capable(CFS_CAP_SYS_RESOURCE))
305 oap->oap_brw_flags |= OBD_BRW_NOQUOTA;
307 if (oio->oi_lockless)
308 /* see osc_io_prepare_write() for lockless io handling. */
309 cl_page_clip(env, slice->cpl_page, from, to);
314 static int osc_io_rw_iter_init(const struct lu_env *env,
315 const struct cl_io_slice *ios)
317 struct cl_io *io = ios->cis_io;
318 struct osc_io *oio = osc_env_io(env);
319 struct osc_object *osc = cl2osc(ios->cis_obj);
320 struct client_obd *cli = osc_cli(osc);
323 unsigned int max_pages;
326 if (cl_io_is_append(io))
329 npages = io->u.ci_rw.crw_count >> PAGE_CACHE_SHIFT;
330 if (io->u.ci_rw.crw_pos & ~CFS_PAGE_MASK)
333 max_pages = cli->cl_max_pages_per_rpc * cli->cl_max_rpcs_in_flight;
334 if (npages > max_pages)
337 c = cfs_atomic_read(cli->cl_lru_left);
338 if (c < npages && osc_lru_reclaim(cli) > 0)
339 c = cfs_atomic_read(cli->cl_lru_left);
340 while (c >= npages) {
341 if (c == cfs_atomic_cmpxchg(cli->cl_lru_left, c, c - npages)) {
342 oio->oi_lru_reserved = npages;
345 c = cfs_atomic_read(cli->cl_lru_left);
351 static void osc_io_rw_iter_fini(const struct lu_env *env,
352 const struct cl_io_slice *ios)
354 struct osc_io *oio = osc_env_io(env);
355 struct osc_object *osc = cl2osc(ios->cis_obj);
356 struct client_obd *cli = osc_cli(osc);
358 if (oio->oi_lru_reserved > 0) {
359 cfs_atomic_add(oio->oi_lru_reserved, cli->cl_lru_left);
360 oio->oi_lru_reserved = 0;
364 static int osc_io_fault_start(const struct lu_env *env,
365 const struct cl_io_slice *ios)
368 struct cl_fault_io *fio;
373 fio = &io->u.ci_fault;
374 CDEBUG(D_INFO, "%lu %d %d\n",
375 fio->ft_index, fio->ft_writable, fio->ft_nob);
377 * If mapping is writeable, adjust kms to cover this page,
378 * but do not extend kms beyond actual file size.
381 if (fio->ft_writable)
382 osc_page_touch_at(env, ios->cis_obj,
383 fio->ft_index, fio->ft_nob);
387 static int osc_async_upcall(void *a, int rc)
389 struct osc_async_cbargs *args = a;
392 complete(&args->opc_sync);
396 #if defined(__KERNEL__)
398 * Checks that there are no pages being written in the extent being truncated.
400 static int trunc_check_cb(const struct lu_env *env, struct cl_io *io,
401 struct osc_page *ops , void *cbdata)
403 struct cl_page *page = ops->ops_cl.cpl_page;
404 struct osc_async_page *oap;
405 __u64 start = *(__u64 *)cbdata;
408 if (oap->oap_cmd & OBD_BRW_WRITE &&
409 !cfs_list_empty(&oap->oap_pending_item))
410 CL_PAGE_DEBUG(D_ERROR, env, page, "exists " LPU64 "/%s.\n",
411 start, current->comm);
415 struct page *vmpage = cl_page_vmpage(env, page);
416 if (PageLocked(vmpage))
417 CDEBUG(D_CACHE, "page %p index %lu locked for %d.\n",
419 (oap->oap_cmd & OBD_BRW_RWMASK));
423 return CLP_GANG_OKAY;
426 static void osc_trunc_check(const struct lu_env *env, struct cl_io *io,
427 struct osc_io *oio, __u64 size)
429 struct cl_object *clob;
433 clob = oio->oi_cl.cis_obj;
434 start = cl_index(clob, size);
435 partial = cl_offset(clob, start) < size;
438 * Complain if there are pages in the truncated region.
440 osc_page_gang_lookup(env, io, cl2osc(clob),
441 start + partial, CL_PAGE_EOF,
442 trunc_check_cb, (void *)&size);
444 #else /* __KERNEL__ */
445 static void osc_trunc_check(const struct lu_env *env, struct cl_io *io,
446 struct osc_io *oio, __u64 size)
452 static int osc_io_setattr_start(const struct lu_env *env,
453 const struct cl_io_slice *slice)
455 struct cl_io *io = slice->cis_io;
456 struct osc_io *oio = cl2osc_io(env, slice);
457 struct cl_object *obj = slice->cis_obj;
458 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
459 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
460 struct obdo *oa = &oio->oi_oa;
461 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
462 __u64 size = io->u.ci_setattr.sa_attr.lvb_size;
463 unsigned int ia_valid = io->u.ci_setattr.sa_valid;
465 struct obd_info oinfo = { { { 0 } } };
467 /* truncate cache dirty pages first */
468 if (cl_io_is_trunc(io))
469 result = osc_cache_truncate_start(env, oio, cl2osc(obj), size);
471 if (result == 0 && oio->oi_lockless == 0) {
472 cl_object_attr_lock(obj);
473 result = cl_object_attr_get(env, obj, attr);
475 struct ost_lvb *lvb = &io->u.ci_setattr.sa_attr;
476 unsigned int cl_valid = 0;
478 if (ia_valid & ATTR_SIZE) {
479 attr->cat_size = attr->cat_kms = size;
480 cl_valid = (CAT_SIZE | CAT_KMS);
482 if (ia_valid & ATTR_MTIME_SET) {
483 attr->cat_mtime = lvb->lvb_mtime;
484 cl_valid |= CAT_MTIME;
486 if (ia_valid & ATTR_ATIME_SET) {
487 attr->cat_atime = lvb->lvb_atime;
488 cl_valid |= CAT_ATIME;
490 if (ia_valid & ATTR_CTIME_SET) {
491 attr->cat_ctime = lvb->lvb_ctime;
492 cl_valid |= CAT_CTIME;
494 result = cl_object_attr_set(env, obj, attr, cl_valid);
496 cl_object_attr_unlock(obj);
498 memset(oa, 0, sizeof(*oa));
500 oa->o_oi = loi->loi_oi;
501 oa->o_mtime = attr->cat_mtime;
502 oa->o_atime = attr->cat_atime;
503 oa->o_ctime = attr->cat_ctime;
504 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP | OBD_MD_FLATIME |
505 OBD_MD_FLCTIME | OBD_MD_FLMTIME;
506 if (ia_valid & ATTR_SIZE) {
508 oa->o_blocks = OBD_OBJECT_EOF;
509 oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
511 if (oio->oi_lockless) {
512 oa->o_flags = OBD_FL_SRVLOCK;
513 oa->o_valid |= OBD_MD_FLFLAGS;
516 LASSERT(oio->oi_lockless == 0);
520 oinfo.oi_capa = io->u.ci_setattr.sa_capa;
521 init_completion(&cbargs->opc_sync);
523 if (ia_valid & ATTR_SIZE)
524 result = osc_punch_base(osc_export(cl2osc(obj)),
525 &oinfo, osc_async_upcall,
526 cbargs, PTLRPCD_SET);
528 result = osc_setattr_async_base(osc_export(cl2osc(obj)),
531 cbargs, PTLRPCD_SET);
532 cbargs->opc_rpc_sent = result == 0;
537 static void osc_io_setattr_end(const struct lu_env *env,
538 const struct cl_io_slice *slice)
540 struct cl_io *io = slice->cis_io;
541 struct osc_io *oio = cl2osc_io(env, slice);
542 struct cl_object *obj = slice->cis_obj;
543 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
546 if (cbargs->opc_rpc_sent) {
547 wait_for_completion(&cbargs->opc_sync);
548 result = io->ci_result = cbargs->opc_rc;
551 if (oio->oi_lockless) {
552 /* lockless truncate */
553 struct osc_device *osd = lu2osc_dev(obj->co_lu.lo_dev);
555 LASSERT(cl_io_is_trunc(io));
556 /* XXX: Need a lock. */
557 osd->od_stats.os_lockless_truncates++;
561 if (cl_io_is_trunc(io)) {
562 __u64 size = io->u.ci_setattr.sa_attr.lvb_size;
563 osc_trunc_check(env, io, oio, size);
564 if (oio->oi_trunc != NULL) {
565 osc_cache_truncate_end(env, oio, cl2osc(obj));
566 oio->oi_trunc = NULL;
571 static int osc_io_read_start(const struct lu_env *env,
572 const struct cl_io_slice *slice)
574 struct osc_io *oio = cl2osc_io(env, slice);
575 struct cl_object *obj = slice->cis_obj;
576 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
580 if (oio->oi_lockless == 0 && !slice->cis_io->ci_noatime) {
581 cl_object_attr_lock(obj);
582 attr->cat_atime = LTIME_S(CFS_CURRENT_TIME);
583 rc = cl_object_attr_set(env, obj, attr, CAT_ATIME);
584 cl_object_attr_unlock(obj);
590 static int osc_io_write_start(const struct lu_env *env,
591 const struct cl_io_slice *slice)
593 struct osc_io *oio = cl2osc_io(env, slice);
594 struct cl_object *obj = slice->cis_obj;
595 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
599 if (oio->oi_lockless == 0) {
600 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_SETTIME, 1);
601 cl_object_attr_lock(obj);
602 result = cl_object_attr_get(env, obj, attr);
604 attr->cat_mtime = attr->cat_ctime =
605 LTIME_S(CFS_CURRENT_TIME);
606 result = cl_object_attr_set(env, obj, attr,
607 CAT_MTIME | CAT_CTIME);
609 cl_object_attr_unlock(obj);
614 static int osc_fsync_ost(const struct lu_env *env, struct osc_object *obj,
615 struct cl_fsync_io *fio)
617 struct osc_io *oio = osc_env_io(env);
618 struct obdo *oa = &oio->oi_oa;
619 struct obd_info *oinfo = &oio->oi_info;
620 struct lov_oinfo *loi = obj->oo_oinfo;
621 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
625 memset(oa, 0, sizeof(*oa));
626 oa->o_oi = loi->loi_oi;
627 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
629 /* reload size abd blocks for start and end of sync range */
630 oa->o_size = fio->fi_start;
631 oa->o_blocks = fio->fi_end;
632 oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
634 obdo_set_parent_fid(oa, fio->fi_fid);
636 memset(oinfo, 0, sizeof(*oinfo));
638 oinfo->oi_capa = fio->fi_capa;
639 init_completion(&cbargs->opc_sync);
641 rc = osc_sync_base(osc_export(obj), oinfo, osc_async_upcall, cbargs,
646 static int osc_io_fsync_start(const struct lu_env *env,
647 const struct cl_io_slice *slice)
649 struct cl_io *io = slice->cis_io;
650 struct cl_fsync_io *fio = &io->u.ci_fsync;
651 struct cl_object *obj = slice->cis_obj;
652 struct osc_object *osc = cl2osc(obj);
653 pgoff_t start = cl_index(obj, fio->fi_start);
654 pgoff_t end = cl_index(obj, fio->fi_end);
658 if (fio->fi_end == OBD_OBJECT_EOF)
661 result = osc_cache_writeback_range(env, osc, start, end, 0,
662 fio->fi_mode == CL_FSYNC_DISCARD);
664 fio->fi_nr_written += result;
667 if (fio->fi_mode == CL_FSYNC_ALL) {
670 /* we have to wait for writeback to finish before we can
671 * send OST_SYNC RPC. This is bad because it causes extents
672 * to be written osc by osc. However, we usually start
673 * writeback before CL_FSYNC_ALL so this won't have any real
675 rc = osc_cache_wait_range(env, osc, start, end);
678 rc = osc_fsync_ost(env, osc, fio);
686 static void osc_io_fsync_end(const struct lu_env *env,
687 const struct cl_io_slice *slice)
689 struct cl_fsync_io *fio = &slice->cis_io->u.ci_fsync;
690 struct cl_object *obj = slice->cis_obj;
691 pgoff_t start = cl_index(obj, fio->fi_start);
692 pgoff_t end = cl_index(obj, fio->fi_end);
695 if (fio->fi_mode == CL_FSYNC_LOCAL) {
696 result = osc_cache_wait_range(env, cl2osc(obj), start, end);
697 } else if (fio->fi_mode == CL_FSYNC_ALL) {
698 struct osc_io *oio = cl2osc_io(env, slice);
699 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
701 wait_for_completion(&cbargs->opc_sync);
703 result = cbargs->opc_rc;
705 slice->cis_io->ci_result = result;
708 static void osc_io_end(const struct lu_env *env,
709 const struct cl_io_slice *slice)
711 struct osc_io *oio = cl2osc_io(env, slice);
713 if (oio->oi_active) {
714 osc_extent_release(env, oio->oi_active);
715 oio->oi_active = NULL;
719 static const struct cl_io_operations osc_io_ops = {
722 .cio_start = osc_io_read_start,
723 .cio_fini = osc_io_fini
726 .cio_iter_init = osc_io_rw_iter_init,
727 .cio_iter_fini = osc_io_rw_iter_fini,
728 .cio_start = osc_io_write_start,
729 .cio_end = osc_io_end,
730 .cio_fini = osc_io_fini
733 .cio_start = osc_io_setattr_start,
734 .cio_end = osc_io_setattr_end
737 .cio_start = osc_io_fault_start,
738 .cio_end = osc_io_end,
739 .cio_fini = osc_io_fini
742 .cio_start = osc_io_fsync_start,
743 .cio_end = osc_io_fsync_end,
744 .cio_fini = osc_io_fini
747 .cio_fini = osc_io_fini
752 .cio_submit = osc_io_submit
755 .cio_submit = osc_io_submit
758 .cio_prepare_write = osc_io_prepare_write,
759 .cio_commit_write = osc_io_commit_write
762 /*****************************************************************************
764 * Transfer operations.
768 static int osc_req_prep(const struct lu_env *env,
769 const struct cl_req_slice *slice)
774 static void osc_req_completion(const struct lu_env *env,
775 const struct cl_req_slice *slice, int ioret)
779 or = cl2osc_req(slice);
780 OBD_SLAB_FREE_PTR(or, osc_req_kmem);
784 * Implementation of struct cl_req_operations::cro_attr_set() for osc
785 * layer. osc is responsible for struct obdo::o_id and struct obdo::o_seq
788 static void osc_req_attr_set(const struct lu_env *env,
789 const struct cl_req_slice *slice,
790 const struct cl_object *obj,
791 struct cl_req_attr *attr, obd_valid flags)
793 struct lov_oinfo *oinfo;
794 struct cl_req *clerq;
795 struct cl_page *apage; /* _some_ page in @clerq */
796 struct cl_lock *lock; /* _some_ lock protecting @apage */
797 struct osc_lock *olck;
798 struct osc_page *opg;
802 oinfo = cl2osc(obj)->oo_oinfo;
803 lvb = &oinfo->loi_lvb;
806 if ((flags & OBD_MD_FLMTIME) != 0) {
807 oa->o_mtime = lvb->lvb_mtime;
808 oa->o_valid |= OBD_MD_FLMTIME;
810 if ((flags & OBD_MD_FLATIME) != 0) {
811 oa->o_atime = lvb->lvb_atime;
812 oa->o_valid |= OBD_MD_FLATIME;
814 if ((flags & OBD_MD_FLCTIME) != 0) {
815 oa->o_ctime = lvb->lvb_ctime;
816 oa->o_valid |= OBD_MD_FLCTIME;
818 if (flags & OBD_MD_FLGROUP) {
819 ostid_set_seq(&oa->o_oi, ostid_seq(&oinfo->loi_oi));
820 oa->o_valid |= OBD_MD_FLGROUP;
822 if (flags & OBD_MD_FLID) {
823 ostid_set_id(&oa->o_oi, ostid_id(&oinfo->loi_oi));
824 oa->o_valid |= OBD_MD_FLID;
826 if (flags & OBD_MD_FLHANDLE) {
827 clerq = slice->crs_req;
828 LASSERT(!cfs_list_empty(&clerq->crq_pages));
829 apage = container_of(clerq->crq_pages.next,
830 struct cl_page, cp_flight);
831 opg = osc_cl_page_osc(apage);
832 apage = opg->ops_cl.cpl_page; /* now apage is a sub-page */
833 lock = cl_lock_at_page(env, apage->cp_obj, apage, NULL, 1, 1);
835 struct cl_object_header *head;
836 struct cl_lock *scan;
838 head = cl_object_header(apage->cp_obj);
839 cfs_list_for_each_entry(scan, &head->coh_locks,
841 CL_LOCK_DEBUG(D_ERROR, env, scan,
843 CL_PAGE_DEBUG(D_ERROR, env, apage,
844 "dump uncover page!\n");
845 libcfs_debug_dumpstack(NULL);
849 olck = osc_lock_at(lock);
850 LASSERT(olck != NULL);
851 LASSERT(ergo(opg->ops_srvlock, olck->ols_lock == NULL));
852 /* check for lockless io. */
853 if (olck->ols_lock != NULL) {
854 oa->o_handle = olck->ols_lock->l_remote_handle;
855 oa->o_valid |= OBD_MD_FLHANDLE;
857 cl_lock_put(env, lock);
861 static const struct cl_req_operations osc_req_ops = {
862 .cro_prep = osc_req_prep,
863 .cro_attr_set = osc_req_attr_set,
864 .cro_completion = osc_req_completion
868 int osc_io_init(const struct lu_env *env,
869 struct cl_object *obj, struct cl_io *io)
871 struct osc_io *oio = osc_env_io(env);
873 CL_IO_SLICE_CLEAN(oio, oi_cl);
874 cl_io_slice_add(io, &oio->oi_cl, obj, &osc_io_ops);
878 int osc_req_init(const struct lu_env *env, struct cl_device *dev,
884 OBD_SLAB_ALLOC_PTR_GFP(or, osc_req_kmem, __GFP_IO);
886 cl_req_slice_add(req, &or->or_cl, dev, &osc_req_ops);