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 cl_page_list_move(qout, qin, page);
171 spin_lock(&oap->oap_lock);
172 oap->oap_async_flags = ASYNC_URGENT|ASYNC_READY;
173 oap->oap_async_flags |= ASYNC_COUNT_STABLE;
174 spin_unlock(&oap->oap_lock);
176 osc_page_submit(env, opg, crt, brw_flags);
177 list_add_tail(&oap->oap_pending_item, &list);
178 if (++queued == max_pages) {
180 result = osc_queue_sync_pages(env, osc, &list, cmd,
188 result = osc_queue_sync_pages(env, osc, &list, cmd, brw_flags);
190 CDEBUG(D_INFO, "%d/%d %d\n", qin->pl_nr, qout->pl_nr, result);
191 return qout->pl_nr > 0 ? 0 : result;
195 * This is called when a page is accessed within file in a way that creates
196 * new page, if one were missing (i.e., if there were a hole at that place in
197 * the file, or accessed page is beyond the current file size).
199 * Expand stripe KMS if necessary.
201 static void osc_page_touch_at(const struct lu_env *env,
202 struct cl_object *obj, pgoff_t idx, unsigned to)
204 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
205 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
209 /* offset within stripe */
210 kms = cl_offset(obj, idx) + to;
212 cl_object_attr_lock(obj);
216 * ll_inode_size_lock(inode, 0); lov_stripe_lock(lsm);
220 CDEBUG(D_INODE, "stripe KMS %sincreasing "LPU64"->"LPU64" "LPU64"\n",
221 kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms,
222 loi->loi_lvb.lvb_size);
224 attr->cat_mtime = attr->cat_ctime = LTIME_S(CFS_CURRENT_TIME);
225 valid = CAT_MTIME | CAT_CTIME;
226 if (kms > loi->loi_kms) {
230 if (kms > loi->loi_lvb.lvb_size) {
231 attr->cat_size = kms;
234 cl_object_attr_set(env, obj, attr, valid);
235 cl_object_attr_unlock(obj);
238 static int osc_io_commit_async(const struct lu_env *env,
239 const struct cl_io_slice *ios,
240 struct cl_page_list *qin, int from, int to,
243 struct cl_io *io = ios->cis_io;
244 struct osc_io *oio = cl2osc_io(env, ios);
245 struct osc_object *osc = cl2osc(ios->cis_obj);
246 struct cl_page *page;
247 struct cl_page *last_page;
248 struct osc_page *opg;
252 LASSERT(qin->pl_nr > 0);
254 /* Handle partial page cases */
255 last_page = cl_page_list_last(qin);
256 if (oio->oi_lockless) {
257 page = cl_page_list_first(qin);
258 if (page == last_page) {
259 cl_page_clip(env, page, from, to);
262 cl_page_clip(env, page, from, PAGE_SIZE);
264 cl_page_clip(env, last_page, 0, to);
268 while (qin->pl_nr > 0) {
269 struct osc_async_page *oap;
271 page = cl_page_list_first(qin);
272 opg = osc_cl_page_osc(page, osc);
275 if (!list_empty(&oap->oap_rpc_item)) {
276 CDEBUG(D_CACHE, "Busy oap %p page %p for submit.\n",
282 /* The page may be already in dirty cache. */
283 if (list_empty(&oap->oap_pending_item)) {
284 result = osc_page_cache_add(env, &opg->ops_cl, io);
289 osc_page_touch_at(env, osc2cl(osc), osc_index(opg),
290 page == last_page ? to : PAGE_SIZE);
292 cl_page_list_del(env, qin, page);
294 (*cb)(env, io, page);
295 /* Can't access page any more. Page can be in transfer and
296 * complete at any time. */
299 /* for sync write, kernel will wait for this page to be flushed before
300 * osc_io_end() is called, so release it earlier.
301 * for mkwrite(), it's known there is no further pages. */
302 if (cl_io_is_sync_write(io) && oio->oi_active != NULL) {
303 osc_extent_release(env, oio->oi_active);
304 oio->oi_active = NULL;
307 CDEBUG(D_INFO, "%d %d\n", qin->pl_nr, result);
311 static int osc_io_rw_iter_init(const struct lu_env *env,
312 const struct cl_io_slice *ios)
314 struct cl_io *io = ios->cis_io;
315 struct osc_io *oio = osc_env_io(env);
316 struct osc_object *osc = cl2osc(ios->cis_obj);
317 struct client_obd *cli = osc_cli(osc);
320 unsigned int max_pages;
323 if (cl_io_is_append(io))
326 npages = io->u.ci_rw.crw_count >> PAGE_CACHE_SHIFT;
327 if (io->u.ci_rw.crw_pos & ~CFS_PAGE_MASK)
330 max_pages = cli->cl_max_pages_per_rpc * cli->cl_max_rpcs_in_flight;
331 if (npages > max_pages)
334 c = atomic_read(cli->cl_lru_left);
335 if (c < npages && osc_lru_reclaim(cli) > 0)
336 c = atomic_read(cli->cl_lru_left);
337 while (c >= npages) {
338 if (c == atomic_cmpxchg(cli->cl_lru_left, c, c - npages)) {
339 oio->oi_lru_reserved = npages;
342 c = atomic_read(cli->cl_lru_left);
348 static void osc_io_rw_iter_fini(const struct lu_env *env,
349 const struct cl_io_slice *ios)
351 struct osc_io *oio = osc_env_io(env);
352 struct osc_object *osc = cl2osc(ios->cis_obj);
353 struct client_obd *cli = osc_cli(osc);
355 if (oio->oi_lru_reserved > 0) {
356 atomic_add(oio->oi_lru_reserved, cli->cl_lru_left);
357 oio->oi_lru_reserved = 0;
361 static int osc_io_fault_start(const struct lu_env *env,
362 const struct cl_io_slice *ios)
365 struct cl_fault_io *fio;
370 fio = &io->u.ci_fault;
371 CDEBUG(D_INFO, "%lu %d %d\n",
372 fio->ft_index, fio->ft_writable, fio->ft_nob);
374 * If mapping is writeable, adjust kms to cover this page,
375 * but do not extend kms beyond actual file size.
378 if (fio->ft_writable)
379 osc_page_touch_at(env, ios->cis_obj,
380 fio->ft_index, fio->ft_nob);
384 static int osc_async_upcall(void *a, int rc)
386 struct osc_async_cbargs *args = a;
389 complete(&args->opc_sync);
393 #if defined(__KERNEL__)
395 * Checks that there are no pages being written in the extent being truncated.
397 static int trunc_check_cb(const struct lu_env *env, struct cl_io *io,
398 struct osc_page *ops , void *cbdata)
400 struct cl_page *page = ops->ops_cl.cpl_page;
401 struct osc_async_page *oap;
402 __u64 start = *(__u64 *)cbdata;
405 if (oap->oap_cmd & OBD_BRW_WRITE &&
406 !list_empty(&oap->oap_pending_item))
407 CL_PAGE_DEBUG(D_ERROR, env, page, "exists " LPU64 "/%s.\n",
408 start, current->comm);
411 if (PageLocked(page->cp_vmpage))
412 CDEBUG(D_CACHE, "page %p index %lu locked for %d.\n",
413 ops, osc_index(ops), oap->oap_cmd & OBD_BRW_RWMASK);
416 return CLP_GANG_OKAY;
419 static void osc_trunc_check(const struct lu_env *env, struct cl_io *io,
420 struct osc_io *oio, __u64 size)
422 struct cl_object *clob;
426 clob = oio->oi_cl.cis_obj;
427 start = cl_index(clob, size);
428 partial = cl_offset(clob, start) < size;
431 * Complain if there are pages in the truncated region.
433 osc_page_gang_lookup(env, io, cl2osc(clob),
434 start + partial, CL_PAGE_EOF,
435 trunc_check_cb, (void *)&size);
437 #else /* __KERNEL__ */
438 static void osc_trunc_check(const struct lu_env *env, struct cl_io *io,
439 struct osc_io *oio, __u64 size)
445 static int osc_io_setattr_start(const struct lu_env *env,
446 const struct cl_io_slice *slice)
448 struct cl_io *io = slice->cis_io;
449 struct osc_io *oio = cl2osc_io(env, slice);
450 struct cl_object *obj = slice->cis_obj;
451 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
452 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
453 struct obdo *oa = &oio->oi_oa;
454 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
455 __u64 size = io->u.ci_setattr.sa_attr.lvb_size;
456 unsigned int ia_valid = io->u.ci_setattr.sa_valid;
458 struct obd_info oinfo = { { { 0 } } };
460 /* truncate cache dirty pages first */
461 if (cl_io_is_trunc(io))
462 result = osc_cache_truncate_start(env, oio, cl2osc(obj), size);
464 if (result == 0 && oio->oi_lockless == 0) {
465 cl_object_attr_lock(obj);
466 result = cl_object_attr_get(env, obj, attr);
468 struct ost_lvb *lvb = &io->u.ci_setattr.sa_attr;
469 unsigned int cl_valid = 0;
471 if (ia_valid & ATTR_SIZE) {
472 attr->cat_size = attr->cat_kms = size;
473 cl_valid = (CAT_SIZE | CAT_KMS);
475 if (ia_valid & ATTR_MTIME_SET) {
476 attr->cat_mtime = lvb->lvb_mtime;
477 cl_valid |= CAT_MTIME;
479 if (ia_valid & ATTR_ATIME_SET) {
480 attr->cat_atime = lvb->lvb_atime;
481 cl_valid |= CAT_ATIME;
483 if (ia_valid & ATTR_CTIME_SET) {
484 attr->cat_ctime = lvb->lvb_ctime;
485 cl_valid |= CAT_CTIME;
487 result = cl_object_attr_set(env, obj, attr, cl_valid);
489 cl_object_attr_unlock(obj);
491 memset(oa, 0, sizeof(*oa));
493 oa->o_oi = loi->loi_oi;
494 oa->o_mtime = attr->cat_mtime;
495 oa->o_atime = attr->cat_atime;
496 oa->o_ctime = attr->cat_ctime;
497 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP | OBD_MD_FLATIME |
498 OBD_MD_FLCTIME | OBD_MD_FLMTIME;
499 if (ia_valid & ATTR_SIZE) {
501 oa->o_blocks = OBD_OBJECT_EOF;
502 oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
504 if (oio->oi_lockless) {
505 oa->o_flags = OBD_FL_SRVLOCK;
506 oa->o_valid |= OBD_MD_FLFLAGS;
509 LASSERT(oio->oi_lockless == 0);
513 oinfo.oi_capa = io->u.ci_setattr.sa_capa;
514 init_completion(&cbargs->opc_sync);
516 if (ia_valid & ATTR_SIZE)
517 result = osc_punch_base(osc_export(cl2osc(obj)),
518 &oinfo, osc_async_upcall,
519 cbargs, PTLRPCD_SET);
521 result = osc_setattr_async_base(osc_export(cl2osc(obj)),
524 cbargs, PTLRPCD_SET);
525 cbargs->opc_rpc_sent = result == 0;
530 static void osc_io_setattr_end(const struct lu_env *env,
531 const struct cl_io_slice *slice)
533 struct cl_io *io = slice->cis_io;
534 struct osc_io *oio = cl2osc_io(env, slice);
535 struct cl_object *obj = slice->cis_obj;
536 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
539 if (cbargs->opc_rpc_sent) {
540 wait_for_completion(&cbargs->opc_sync);
541 result = io->ci_result = cbargs->opc_rc;
544 if (oio->oi_lockless) {
545 /* lockless truncate */
546 struct osc_device *osd = lu2osc_dev(obj->co_lu.lo_dev);
548 LASSERT(cl_io_is_trunc(io));
549 /* XXX: Need a lock. */
550 osd->od_stats.os_lockless_truncates++;
554 if (cl_io_is_trunc(io)) {
555 __u64 size = io->u.ci_setattr.sa_attr.lvb_size;
556 osc_trunc_check(env, io, oio, size);
557 if (oio->oi_trunc != NULL) {
558 osc_cache_truncate_end(env, oio, cl2osc(obj));
559 oio->oi_trunc = NULL;
564 static int osc_io_read_start(const struct lu_env *env,
565 const struct cl_io_slice *slice)
567 struct cl_object *obj = slice->cis_obj;
568 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
572 if (!slice->cis_io->ci_noatime) {
573 cl_object_attr_lock(obj);
574 attr->cat_atime = LTIME_S(CFS_CURRENT_TIME);
575 rc = cl_object_attr_set(env, obj, attr, CAT_ATIME);
576 cl_object_attr_unlock(obj);
582 static int osc_io_write_start(const struct lu_env *env,
583 const struct cl_io_slice *slice)
585 struct cl_object *obj = slice->cis_obj;
586 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
590 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_SETTIME, 1);
591 cl_object_attr_lock(obj);
592 attr->cat_mtime = attr->cat_ctime = LTIME_S(CFS_CURRENT_TIME);
593 rc = cl_object_attr_set(env, obj, attr, CAT_MTIME | CAT_CTIME);
594 cl_object_attr_unlock(obj);
599 static int osc_fsync_ost(const struct lu_env *env, struct osc_object *obj,
600 struct cl_fsync_io *fio)
602 struct osc_io *oio = osc_env_io(env);
603 struct obdo *oa = &oio->oi_oa;
604 struct obd_info *oinfo = &oio->oi_info;
605 struct lov_oinfo *loi = obj->oo_oinfo;
606 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
610 memset(oa, 0, sizeof(*oa));
611 oa->o_oi = loi->loi_oi;
612 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
614 /* reload size abd blocks for start and end of sync range */
615 oa->o_size = fio->fi_start;
616 oa->o_blocks = fio->fi_end;
617 oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
619 obdo_set_parent_fid(oa, fio->fi_fid);
621 memset(oinfo, 0, sizeof(*oinfo));
623 oinfo->oi_capa = fio->fi_capa;
624 init_completion(&cbargs->opc_sync);
626 rc = osc_sync_base(osc_export(obj), oinfo, osc_async_upcall, cbargs,
631 static int osc_io_fsync_start(const struct lu_env *env,
632 const struct cl_io_slice *slice)
634 struct cl_io *io = slice->cis_io;
635 struct cl_fsync_io *fio = &io->u.ci_fsync;
636 struct cl_object *obj = slice->cis_obj;
637 struct osc_object *osc = cl2osc(obj);
638 pgoff_t start = cl_index(obj, fio->fi_start);
639 pgoff_t end = cl_index(obj, fio->fi_end);
643 if (fio->fi_end == OBD_OBJECT_EOF)
646 result = osc_cache_writeback_range(env, osc, start, end, 0,
647 fio->fi_mode == CL_FSYNC_DISCARD);
649 fio->fi_nr_written += result;
652 if (fio->fi_mode == CL_FSYNC_ALL) {
655 /* we have to wait for writeback to finish before we can
656 * send OST_SYNC RPC. This is bad because it causes extents
657 * to be written osc by osc. However, we usually start
658 * writeback before CL_FSYNC_ALL so this won't have any real
660 rc = osc_cache_wait_range(env, osc, start, end);
663 rc = osc_fsync_ost(env, osc, fio);
671 static void osc_io_fsync_end(const struct lu_env *env,
672 const struct cl_io_slice *slice)
674 struct cl_fsync_io *fio = &slice->cis_io->u.ci_fsync;
675 struct cl_object *obj = slice->cis_obj;
676 pgoff_t start = cl_index(obj, fio->fi_start);
677 pgoff_t end = cl_index(obj, fio->fi_end);
680 if (fio->fi_mode == CL_FSYNC_LOCAL) {
681 result = osc_cache_wait_range(env, cl2osc(obj), start, end);
682 } else if (fio->fi_mode == CL_FSYNC_ALL) {
683 struct osc_io *oio = cl2osc_io(env, slice);
684 struct osc_async_cbargs *cbargs = &oio->oi_cbarg;
686 wait_for_completion(&cbargs->opc_sync);
688 result = cbargs->opc_rc;
690 slice->cis_io->ci_result = result;
693 static void osc_io_end(const struct lu_env *env,
694 const struct cl_io_slice *slice)
696 struct osc_io *oio = cl2osc_io(env, slice);
698 if (oio->oi_active) {
699 osc_extent_release(env, oio->oi_active);
700 oio->oi_active = NULL;
704 static const struct cl_io_operations osc_io_ops = {
707 .cio_start = osc_io_read_start,
708 .cio_fini = osc_io_fini
711 .cio_iter_init = osc_io_rw_iter_init,
712 .cio_iter_fini = osc_io_rw_iter_fini,
713 .cio_start = osc_io_write_start,
714 .cio_end = osc_io_end,
715 .cio_fini = osc_io_fini
718 .cio_start = osc_io_setattr_start,
719 .cio_end = osc_io_setattr_end
722 .cio_start = osc_io_fault_start,
723 .cio_end = osc_io_end,
724 .cio_fini = osc_io_fini
727 .cio_start = osc_io_fsync_start,
728 .cio_end = osc_io_fsync_end,
729 .cio_fini = osc_io_fini
732 .cio_fini = osc_io_fini
735 .cio_submit = osc_io_submit,
736 .cio_commit_async = osc_io_commit_async
739 /*****************************************************************************
741 * Transfer operations.
745 static int osc_req_prep(const struct lu_env *env,
746 const struct cl_req_slice *slice)
751 static void osc_req_completion(const struct lu_env *env,
752 const struct cl_req_slice *slice, int ioret)
756 or = cl2osc_req(slice);
757 OBD_SLAB_FREE_PTR(or, osc_req_kmem);
761 * Implementation of struct cl_req_operations::cro_attr_set() for osc
762 * layer. osc is responsible for struct obdo::o_id and struct obdo::o_seq
765 static void osc_req_attr_set(const struct lu_env *env,
766 const struct cl_req_slice *slice,
767 const struct cl_object *obj,
768 struct cl_req_attr *attr, obd_valid flags)
770 struct lov_oinfo *oinfo;
771 struct cl_req *clerq;
772 struct cl_page *apage; /* _some_ page in @clerq */
773 struct cl_lock *lock; /* _some_ lock protecting @apage */
774 struct osc_lock *olck;
775 struct osc_page *opg;
779 oinfo = cl2osc(obj)->oo_oinfo;
780 lvb = &oinfo->loi_lvb;
783 if ((flags & OBD_MD_FLMTIME) != 0) {
784 oa->o_mtime = lvb->lvb_mtime;
785 oa->o_valid |= OBD_MD_FLMTIME;
787 if ((flags & OBD_MD_FLATIME) != 0) {
788 oa->o_atime = lvb->lvb_atime;
789 oa->o_valid |= OBD_MD_FLATIME;
791 if ((flags & OBD_MD_FLCTIME) != 0) {
792 oa->o_ctime = lvb->lvb_ctime;
793 oa->o_valid |= OBD_MD_FLCTIME;
795 if (flags & OBD_MD_FLGROUP) {
796 ostid_set_seq(&oa->o_oi, ostid_seq(&oinfo->loi_oi));
797 oa->o_valid |= OBD_MD_FLGROUP;
799 if (flags & OBD_MD_FLID) {
800 ostid_set_id(&oa->o_oi, ostid_id(&oinfo->loi_oi));
801 oa->o_valid |= OBD_MD_FLID;
803 if (flags & OBD_MD_FLHANDLE) {
804 struct cl_object *subobj;
806 clerq = slice->crs_req;
807 LASSERT(!list_empty(&clerq->crq_pages));
808 apage = container_of(clerq->crq_pages.next,
809 struct cl_page, cp_flight);
810 opg = osc_cl_page_osc(apage, NULL);
811 subobj = opg->ops_cl.cpl_obj;
812 lock = cl_lock_at_pgoff(env, subobj, osc_index(opg),
815 struct cl_object_header *head;
816 struct cl_lock *scan;
818 head = cl_object_header(subobj);
819 list_for_each_entry(scan, &head->coh_locks,
821 CL_LOCK_DEBUG(D_ERROR, env, scan,
823 CL_PAGE_DEBUG(D_ERROR, env, apage,
824 "dump uncover page!\n");
825 libcfs_debug_dumpstack(NULL);
829 olck = osc_lock_at(lock);
830 LASSERT(olck != NULL);
831 LASSERT(ergo(opg->ops_srvlock, olck->ols_lock == NULL));
832 /* check for lockless io. */
833 if (olck->ols_lock != NULL) {
834 oa->o_handle = olck->ols_lock->l_remote_handle;
835 oa->o_valid |= OBD_MD_FLHANDLE;
837 cl_lock_put(env, lock);
841 static const struct cl_req_operations osc_req_ops = {
842 .cro_prep = osc_req_prep,
843 .cro_attr_set = osc_req_attr_set,
844 .cro_completion = osc_req_completion
848 int osc_io_init(const struct lu_env *env,
849 struct cl_object *obj, struct cl_io *io)
851 struct osc_io *oio = osc_env_io(env);
853 CL_IO_SLICE_CLEAN(oio, oi_cl);
854 cl_io_slice_add(io, &oio->oi_cl, obj, &osc_io_ops);
858 int osc_req_init(const struct lu_env *env, struct cl_device *dev,
864 OBD_SLAB_ALLOC_PTR_GFP(or, osc_req_kmem, GFP_NOFS);
866 cl_req_slice_add(req, &or->or_cl, dev, &osc_req_ops);