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,
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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).
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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, 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,
71 struct osc_object *osc)
73 const struct cl_page_slice *slice;
76 slice = cl_object_page_slice(&osc->oo_cl, page);
78 slice = cl_page_at(page, &osc_device_type);
79 LASSERT(slice != NULL);
81 return cl2osc_page(slice);
85 /*****************************************************************************
91 static void osc_io_fini(const struct lu_env *env, const struct cl_io_slice *io)
96 * An implementation of cl_io_operations::cio_io_submit() method for osc
97 * layer. Iterates over pages in the in-queue, prepares each for io by calling
98 * cl_page_prep() and then either submits them through osc_io_submit_page()
99 * or, if page is already submitted, changes osc flags through
100 * osc_set_async_flags().
102 static int osc_io_submit(const struct lu_env *env,
103 const struct cl_io_slice *ios,
104 enum cl_req_type crt, struct cl_2queue *queue)
106 struct cl_page *page;
108 struct client_obd *cli = NULL;
109 struct osc_object *osc = NULL; /* to keep gcc happy */
110 struct osc_page *opg;
112 struct list_head list = LIST_HEAD_INIT(list);
114 struct cl_page_list *qin = &queue->c2_qin;
115 struct cl_page_list *qout = &queue->c2_qout;
122 LASSERT(qin->pl_nr > 0);
124 CDEBUG(D_CACHE, "%d %d\n", qin->pl_nr, crt);
126 osc = cl2osc(ios->cis_obj);
128 max_pages = cli->cl_max_pages_per_rpc;
130 cmd = crt == CRT_WRITE ? OBD_BRW_WRITE : OBD_BRW_READ;
131 brw_flags = osc_io_srvlock(cl2osc_io(env, ios)) ? OBD_BRW_SRVLOCK : 0;
134 * NOTE: here @page is a top-level page. This is done to avoid
135 * creation of sub-page-list.
137 cl_page_list_for_each_safe(page, tmp, qin) {
138 struct osc_async_page *oap;
144 opg = osc_cl_page_osc(page, osc);
146 LASSERT(osc == oap->oap_obj);
148 if (!list_empty(&oap->oap_pending_item) ||
149 !list_empty(&oap->oap_rpc_item)) {
150 CDEBUG(D_CACHE, "Busy oap %p page %p for submit.\n",
156 result = cl_page_prep(env, io, page, crt);
159 if (result != -EALREADY)
162 * Handle -EALREADY error: for read case, the page is
163 * already in UPTODATE state; for write, the page
170 spin_lock(&oap->oap_lock);
171 oap->oap_async_flags = ASYNC_URGENT|ASYNC_READY;
172 oap->oap_async_flags |= ASYNC_COUNT_STABLE;
173 spin_unlock(&oap->oap_lock);
175 osc_page_submit(env, opg, crt, brw_flags);
176 list_add_tail(&oap->oap_pending_item, &list);
178 if (page->cp_sync_io != NULL)
179 cl_page_list_move(qout, qin, page);
181 cl_page_list_del(env, qin, page);
183 if (++queued == max_pages) {
185 result = osc_queue_sync_pages(env, osc, &list, cmd,
193 result = osc_queue_sync_pages(env, osc, &list, cmd, brw_flags);
195 CDEBUG(D_INFO, "%d/%d %d\n", qin->pl_nr, qout->pl_nr, result);
196 return qout->pl_nr > 0 ? 0 : result;
200 * This is called when a page is accessed within file in a way that creates
201 * new page, if one were missing (i.e., if there were a hole at that place in
202 * the file, or accessed page is beyond the current file size).
204 * Expand stripe KMS if necessary.
206 static void osc_page_touch_at(const struct lu_env *env,
207 struct cl_object *obj, pgoff_t idx, unsigned to)
209 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
210 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
214 /* offset within stripe */
215 kms = cl_offset(obj, idx) + to;
217 cl_object_attr_lock(obj);
221 * ll_inode_size_lock(inode, 0); lov_stripe_lock(lsm);
225 CDEBUG(D_INODE, "stripe KMS %sincreasing "LPU64"->"LPU64" "LPU64"\n",
226 kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms,
227 loi->loi_lvb.lvb_size);
229 attr->cat_mtime = attr->cat_ctime = LTIME_S(CFS_CURRENT_TIME);
230 valid = CAT_MTIME | CAT_CTIME;
231 if (kms > loi->loi_kms) {
235 if (kms > loi->loi_lvb.lvb_size) {
236 attr->cat_size = kms;
239 cl_object_attr_set(env, obj, attr, valid);
240 cl_object_attr_unlock(obj);
243 static int osc_io_commit_async(const struct lu_env *env,
244 const struct cl_io_slice *ios,
245 struct cl_page_list *qin, int from, int to,
248 struct cl_io *io = ios->cis_io;
249 struct osc_io *oio = cl2osc_io(env, ios);
250 struct osc_object *osc = cl2osc(ios->cis_obj);
251 struct cl_page *page;
252 struct cl_page *last_page;
253 struct osc_page *opg;
257 LASSERT(qin->pl_nr > 0);
259 /* Handle partial page cases */
260 last_page = cl_page_list_last(qin);
261 if (oio->oi_lockless) {
262 page = cl_page_list_first(qin);
263 if (page == last_page) {
264 cl_page_clip(env, page, from, to);
267 cl_page_clip(env, page, from, PAGE_SIZE);
269 cl_page_clip(env, last_page, 0, to);
273 while (qin->pl_nr > 0) {
274 struct osc_async_page *oap;
276 page = cl_page_list_first(qin);
277 opg = osc_cl_page_osc(page, osc);
280 if (!list_empty(&oap->oap_rpc_item)) {
281 CDEBUG(D_CACHE, "Busy oap %p page %p for submit.\n",
287 /* The page may be already in dirty cache. */
288 if (list_empty(&oap->oap_pending_item)) {
289 result = osc_page_cache_add(env, &opg->ops_cl, io);
294 osc_page_touch_at(env, osc2cl(osc), osc_index(opg),
295 page == last_page ? to : PAGE_SIZE);
297 cl_page_list_del(env, qin, page);
299 (*cb)(env, io, page);
300 /* Can't access page any more. Page can be in transfer and
301 * complete at any time. */
304 /* for sync write, kernel will wait for this page to be flushed before
305 * osc_io_end() is called, so release it earlier.
306 * for mkwrite(), it's known there is no further pages. */
307 if (cl_io_is_sync_write(io) && oio->oi_active != NULL) {
308 osc_extent_release(env, oio->oi_active);
309 oio->oi_active = NULL;
312 CDEBUG(D_INFO, "%d %d\n", qin->pl_nr, result);
316 static int osc_io_rw_iter_init(const struct lu_env *env,
317 const struct cl_io_slice *ios)
319 struct cl_io *io = ios->cis_io;
320 struct osc_io *oio = osc_env_io(env);
321 struct osc_object *osc = cl2osc(ios->cis_obj);
322 struct client_obd *cli = osc_cli(osc);
325 unsigned int max_pages;
328 if (cl_io_is_append(io))
331 npages = io->u.ci_rw.crw_count >> PAGE_CACHE_SHIFT;
332 if (io->u.ci_rw.crw_pos & ~CFS_PAGE_MASK)
335 max_pages = cli->cl_max_pages_per_rpc * cli->cl_max_rpcs_in_flight;
336 if (npages > max_pages)
339 c = atomic_read(cli->cl_lru_left);
340 if (c < npages && osc_lru_reclaim(cli) > 0)
341 c = atomic_read(cli->cl_lru_left);
342 while (c >= npages) {
343 if (c == atomic_cmpxchg(cli->cl_lru_left, c, c - npages)) {
344 oio->oi_lru_reserved = npages;
347 c = atomic_read(cli->cl_lru_left);
353 static void osc_io_rw_iter_fini(const struct lu_env *env,
354 const struct cl_io_slice *ios)
356 struct osc_io *oio = osc_env_io(env);
357 struct osc_object *osc = cl2osc(ios->cis_obj);
358 struct client_obd *cli = osc_cli(osc);
360 if (oio->oi_lru_reserved > 0) {
361 atomic_add(oio->oi_lru_reserved, cli->cl_lru_left);
362 oio->oi_lru_reserved = 0;
366 static int osc_io_fault_start(const struct lu_env *env,
367 const struct cl_io_slice *ios)
370 struct cl_fault_io *fio;
375 fio = &io->u.ci_fault;
376 CDEBUG(D_INFO, "%lu %d %d\n",
377 fio->ft_index, fio->ft_writable, fio->ft_nob);
379 * If mapping is writeable, adjust kms to cover this page,
380 * but do not extend kms beyond actual file size.
383 if (fio->ft_writable)
384 osc_page_touch_at(env, ios->cis_obj,
385 fio->ft_index, fio->ft_nob);
389 static int osc_async_upcall(void *a, int rc)
391 struct osc_async_cbargs *args = a;
394 complete(&args->opc_sync);
398 #if defined(__KERNEL__)
400 * Checks that there are no pages being written in the extent being truncated.
402 static int trunc_check_cb(const struct lu_env *env, struct cl_io *io,
403 struct osc_page *ops , void *cbdata)
405 struct cl_page *page = ops->ops_cl.cpl_page;
406 struct osc_async_page *oap;
407 __u64 start = *(__u64 *)cbdata;
410 if (oap->oap_cmd & OBD_BRW_WRITE &&
411 !list_empty(&oap->oap_pending_item))
412 CL_PAGE_DEBUG(D_ERROR, env, page, "exists " LPU64 "/%s.\n",
413 start, current->comm);
416 if (PageLocked(page->cp_vmpage))
417 CDEBUG(D_CACHE, "page %p index %lu locked for %d.\n",
418 ops, osc_index(ops), oap->oap_cmd & OBD_BRW_RWMASK);
421 return CLP_GANG_OKAY;
424 static void osc_trunc_check(const struct lu_env *env, struct cl_io *io,
425 struct osc_io *oio, __u64 size)
427 struct cl_object *clob;
431 clob = oio->oi_cl.cis_obj;
432 start = cl_index(clob, size);
433 partial = cl_offset(clob, start) < size;
436 * Complain if there are pages in the truncated region.
438 osc_page_gang_lookup(env, io, cl2osc(clob),
439 start + partial, CL_PAGE_EOF,
440 trunc_check_cb, (void *)&size);
442 #else /* __KERNEL__ */
443 static void osc_trunc_check(const struct lu_env *env, struct cl_io *io,
444 struct osc_io *oio, __u64 size)
450 static int osc_io_setattr_start(const struct lu_env *env,
451 const struct cl_io_slice *slice)
453 struct cl_io *io = slice->cis_io;
454 struct osc_io *oio = cl2osc_io(env, slice);
455 struct cl_object *obj = slice->cis_obj;
456 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
457 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
458 struct obdo *oa = &oio->oi_oa;
459 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
460 __u64 size = io->u.ci_setattr.sa_attr.lvb_size;
461 unsigned int ia_valid = io->u.ci_setattr.sa_valid;
463 struct obd_info oinfo = { { { 0 } } };
465 /* truncate cache dirty pages first */
466 if (cl_io_is_trunc(io))
467 result = osc_cache_truncate_start(env, oio, cl2osc(obj), size);
469 if (result == 0 && oio->oi_lockless == 0) {
470 cl_object_attr_lock(obj);
471 result = cl_object_attr_get(env, obj, attr);
473 struct ost_lvb *lvb = &io->u.ci_setattr.sa_attr;
474 unsigned int cl_valid = 0;
476 if (ia_valid & ATTR_SIZE) {
477 attr->cat_size = attr->cat_kms = size;
478 cl_valid = (CAT_SIZE | CAT_KMS);
480 if (ia_valid & ATTR_MTIME_SET) {
481 attr->cat_mtime = lvb->lvb_mtime;
482 cl_valid |= CAT_MTIME;
484 if (ia_valid & ATTR_ATIME_SET) {
485 attr->cat_atime = lvb->lvb_atime;
486 cl_valid |= CAT_ATIME;
488 if (ia_valid & ATTR_CTIME_SET) {
489 attr->cat_ctime = lvb->lvb_ctime;
490 cl_valid |= CAT_CTIME;
492 result = cl_object_attr_set(env, obj, attr, cl_valid);
494 cl_object_attr_unlock(obj);
496 memset(oa, 0, sizeof(*oa));
498 oa->o_oi = loi->loi_oi;
499 oa->o_mtime = attr->cat_mtime;
500 oa->o_atime = attr->cat_atime;
501 oa->o_ctime = attr->cat_ctime;
502 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP | OBD_MD_FLATIME |
503 OBD_MD_FLCTIME | OBD_MD_FLMTIME;
504 if (ia_valid & ATTR_SIZE) {
506 oa->o_blocks = OBD_OBJECT_EOF;
507 oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
509 if (oio->oi_lockless) {
510 oa->o_flags = OBD_FL_SRVLOCK;
511 oa->o_valid |= OBD_MD_FLFLAGS;
514 LASSERT(oio->oi_lockless == 0);
518 oinfo.oi_capa = io->u.ci_setattr.sa_capa;
519 init_completion(&cbargs->opc_sync);
521 if (ia_valid & ATTR_SIZE)
522 result = osc_punch_base(osc_export(cl2osc(obj)),
523 &oinfo, osc_async_upcall,
524 cbargs, PTLRPCD_SET);
526 result = osc_setattr_async_base(osc_export(cl2osc(obj)),
529 cbargs, PTLRPCD_SET);
530 cbargs->opc_rpc_sent = result == 0;
535 static void osc_io_setattr_end(const struct lu_env *env,
536 const struct cl_io_slice *slice)
538 struct cl_io *io = slice->cis_io;
539 struct osc_io *oio = cl2osc_io(env, slice);
540 struct cl_object *obj = slice->cis_obj;
541 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
544 if (cbargs->opc_rpc_sent) {
545 result = wait_for_completion_killable(&cbargs->opc_sync);
547 result = cbargs->opc_rc;
548 io->ci_result = result;
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 cl_object *obj = slice->cis_obj;
575 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
579 if (!slice->cis_io->ci_noatime) {
580 cl_object_attr_lock(obj);
581 attr->cat_atime = LTIME_S(CFS_CURRENT_TIME);
582 rc = cl_object_attr_set(env, obj, attr, CAT_ATIME);
583 cl_object_attr_unlock(obj);
589 static int osc_io_write_start(const struct lu_env *env,
590 const struct cl_io_slice *slice)
592 struct cl_object *obj = slice->cis_obj;
593 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
597 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_SETTIME, 1);
598 cl_object_attr_lock(obj);
599 attr->cat_mtime = attr->cat_ctime = LTIME_S(CFS_CURRENT_TIME);
600 rc = cl_object_attr_set(env, obj, attr, CAT_MTIME | CAT_CTIME);
601 cl_object_attr_unlock(obj);
606 static int osc_fsync_ost(const struct lu_env *env, struct osc_object *obj,
607 struct cl_fsync_io *fio)
609 struct osc_io *oio = osc_env_io(env);
610 struct obdo *oa = &oio->oi_oa;
611 struct obd_info *oinfo = &oio->oi_info;
612 struct lov_oinfo *loi = obj->oo_oinfo;
613 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
617 memset(oa, 0, sizeof(*oa));
618 oa->o_oi = loi->loi_oi;
619 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
621 /* reload size abd blocks for start and end of sync range */
622 oa->o_size = fio->fi_start;
623 oa->o_blocks = fio->fi_end;
624 oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
626 obdo_set_parent_fid(oa, fio->fi_fid);
628 memset(oinfo, 0, sizeof(*oinfo));
630 oinfo->oi_capa = fio->fi_capa;
631 init_completion(&cbargs->opc_sync);
633 rc = osc_sync_base(osc_export(obj), oinfo, osc_async_upcall, cbargs,
638 static int osc_io_fsync_start(const struct lu_env *env,
639 const struct cl_io_slice *slice)
641 struct cl_io *io = slice->cis_io;
642 struct cl_fsync_io *fio = &io->u.ci_fsync;
643 struct cl_object *obj = slice->cis_obj;
644 struct osc_object *osc = cl2osc(obj);
645 pgoff_t start = cl_index(obj, fio->fi_start);
646 pgoff_t end = cl_index(obj, fio->fi_end);
650 if (fio->fi_end == OBD_OBJECT_EOF)
653 result = osc_cache_writeback_range(env, osc, start, end, 0,
654 fio->fi_mode == CL_FSYNC_DISCARD);
656 fio->fi_nr_written += result;
659 if (fio->fi_mode == CL_FSYNC_ALL) {
662 /* we have to wait for writeback to finish before we can
663 * send OST_SYNC RPC. This is bad because it causes extents
664 * to be written osc by osc. However, we usually start
665 * writeback before CL_FSYNC_ALL so this won't have any real
667 rc = osc_cache_wait_range(env, osc, start, end);
670 rc = osc_fsync_ost(env, osc, fio);
678 static void osc_io_fsync_end(const struct lu_env *env,
679 const struct cl_io_slice *slice)
681 struct cl_fsync_io *fio = &slice->cis_io->u.ci_fsync;
682 struct cl_object *obj = slice->cis_obj;
683 pgoff_t start = cl_index(obj, fio->fi_start);
684 pgoff_t end = cl_index(obj, fio->fi_end);
687 if (fio->fi_mode == CL_FSYNC_LOCAL) {
688 result = osc_cache_wait_range(env, cl2osc(obj), start, end);
689 } else if (fio->fi_mode == CL_FSYNC_ALL) {
690 struct osc_io *oio = cl2osc_io(env, slice);
691 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
693 result = wait_for_completion_killable(&cbargs->opc_sync);
695 result = cbargs->opc_rc;
697 slice->cis_io->ci_result = result;
700 static void osc_io_end(const struct lu_env *env,
701 const struct cl_io_slice *slice)
703 struct osc_io *oio = cl2osc_io(env, slice);
705 if (oio->oi_active) {
706 osc_extent_release(env, oio->oi_active);
707 oio->oi_active = NULL;
711 static const struct cl_io_operations osc_io_ops = {
714 .cio_start = osc_io_read_start,
715 .cio_fini = osc_io_fini
718 .cio_iter_init = osc_io_rw_iter_init,
719 .cio_iter_fini = osc_io_rw_iter_fini,
720 .cio_start = osc_io_write_start,
721 .cio_end = osc_io_end,
722 .cio_fini = osc_io_fini
725 .cio_start = osc_io_setattr_start,
726 .cio_end = osc_io_setattr_end
729 .cio_start = osc_io_fault_start,
730 .cio_end = osc_io_end,
731 .cio_fini = osc_io_fini
734 .cio_start = osc_io_fsync_start,
735 .cio_end = osc_io_fsync_end,
736 .cio_fini = osc_io_fini
739 .cio_fini = osc_io_fini
742 .cio_submit = osc_io_submit,
743 .cio_commit_async = osc_io_commit_async
746 /*****************************************************************************
748 * Transfer operations.
752 static int osc_req_prep(const struct lu_env *env,
753 const struct cl_req_slice *slice)
758 static void osc_req_completion(const struct lu_env *env,
759 const struct cl_req_slice *slice, int ioret)
763 or = cl2osc_req(slice);
764 OBD_SLAB_FREE_PTR(or, osc_req_kmem);
768 * Implementation of struct cl_req_operations::cro_attr_set() for osc
769 * layer. osc is responsible for struct obdo::o_id and struct obdo::o_seq
772 static void osc_req_attr_set(const struct lu_env *env,
773 const struct cl_req_slice *slice,
774 const struct cl_object *obj,
775 struct cl_req_attr *attr, obd_valid flags)
777 struct lov_oinfo *oinfo;
778 struct cl_req *clerq;
779 struct cl_page *apage; /* _some_ page in @clerq */
780 struct cl_lock *lock; /* _some_ lock protecting @apage */
781 struct osc_lock *olck;
782 struct osc_page *opg;
786 oinfo = cl2osc(obj)->oo_oinfo;
787 lvb = &oinfo->loi_lvb;
790 if ((flags & OBD_MD_FLMTIME) != 0) {
791 oa->o_mtime = lvb->lvb_mtime;
792 oa->o_valid |= OBD_MD_FLMTIME;
794 if ((flags & OBD_MD_FLATIME) != 0) {
795 oa->o_atime = lvb->lvb_atime;
796 oa->o_valid |= OBD_MD_FLATIME;
798 if ((flags & OBD_MD_FLCTIME) != 0) {
799 oa->o_ctime = lvb->lvb_ctime;
800 oa->o_valid |= OBD_MD_FLCTIME;
802 if (flags & OBD_MD_FLGROUP) {
803 ostid_set_seq(&oa->o_oi, ostid_seq(&oinfo->loi_oi));
804 oa->o_valid |= OBD_MD_FLGROUP;
806 if (flags & OBD_MD_FLID) {
807 ostid_set_id(&oa->o_oi, ostid_id(&oinfo->loi_oi));
808 oa->o_valid |= OBD_MD_FLID;
810 if (flags & OBD_MD_FLHANDLE) {
811 struct cl_object *subobj;
813 clerq = slice->crs_req;
814 LASSERT(!list_empty(&clerq->crq_pages));
815 apage = container_of(clerq->crq_pages.next,
816 struct cl_page, cp_flight);
817 opg = osc_cl_page_osc(apage, NULL);
818 subobj = opg->ops_cl.cpl_obj;
819 lock = cl_lock_at_pgoff(env, subobj, osc_index(opg),
822 struct cl_object_header *head;
823 struct cl_lock *scan;
825 head = cl_object_header(subobj);
826 list_for_each_entry(scan, &head->coh_locks,
828 CL_LOCK_DEBUG(D_ERROR, env, scan,
830 CL_PAGE_DEBUG(D_ERROR, env, apage,
831 "dump uncover page!\n");
832 libcfs_debug_dumpstack(NULL);
836 olck = osc_lock_at(lock);
837 LASSERT(olck != NULL);
838 LASSERT(ergo(opg->ops_srvlock, olck->ols_lock == NULL));
839 /* check for lockless io. */
840 if (olck->ols_lock != NULL) {
841 oa->o_handle = olck->ols_lock->l_remote_handle;
842 oa->o_valid |= OBD_MD_FLHANDLE;
844 cl_lock_put(env, lock);
848 static const struct cl_req_operations osc_req_ops = {
849 .cro_prep = osc_req_prep,
850 .cro_attr_set = osc_req_attr_set,
851 .cro_completion = osc_req_completion
855 int osc_io_init(const struct lu_env *env,
856 struct cl_object *obj, struct cl_io *io)
858 struct osc_io *oio = osc_env_io(env);
860 CL_IO_SLICE_CLEAN(oio, oi_cl);
861 cl_io_slice_add(io, &oio->oi_cl, obj, &osc_io_ops);
865 int osc_req_init(const struct lu_env *env, struct cl_device *dev,
871 OBD_SLAB_ALLOC_PTR_GFP(or, osc_req_kmem, GFP_NOFS);
873 cl_req_slice_add(req, &or->or_cl, dev, &osc_req_ops);